CN1265055C - Cut resistant paper and paper articles and method for making same - Google Patents
Cut resistant paper and paper articles and method for making same Download PDFInfo
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- CN1265055C CN1265055C CN02809521.9A CN02809521A CN1265055C CN 1265055 C CN1265055 C CN 1265055C CN 02809521 A CN02809521 A CN 02809521A CN 1265055 C CN1265055 C CN 1265055C
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- paper web
- paper
- file
- microballoon
- cover
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- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
- D21H21/00—Non-fibrous material added to the pulp, characterised by its function, form or properties; Paper-impregnating or coating material, characterised by its function, form or properties
- D21H21/50—Non-fibrous material added to the pulp, characterised by its function, form or properties; Paper-impregnating or coating material, characterised by its function, form or properties characterised by form
- D21H21/52—Additives of definite length or shape
- D21H21/54—Additives of definite length or shape being spherical, e.g. microcapsules, beads
Abstract
The specification discloses a method for making a paper material having a reduced tendency to cut human skin. The Method includes providing a papermaking furnish containing cellulosic fibers and from about 0.5 to about 5.0 wt% by weight dry basis expandable microspheres, forming a paperboard web from the papermaking furnish, drying the web, and calendaring the web to a caliper of from about 18.0 mils and a density ranging from about 7.0 to about 12.0 1b/3000ft<2>/mil. Papers formed according to the method and articles formed therefrom are also disclosed.
Description
Technical field
The present invention relates to paper technology, be specifically related to the production of paper products such as file etc., described paper products are made by the cardboard of the paper a/k/a of weight phase counterweight, are used for office and document environment.
Background technology
The a large amount of paper products of work office application in the present age, the file and/or the cover that comprise writing paper, notepad and be used for putting in order and depositing various paper spares, but be not limited to this.This file and/or cover (hereinafter being referred to as " file ") are used paper material usually and are made, and this paper material is quite hard and durable, thereby can the protected file content, himself are in erectility or keep opposed flattened and can the oneself support.But unfortunately, the edge of this product might cause so-called " paper cuts " to the personnel that handle file usually.Though the situation of grievous injury seldom occurs, because these incised wounds often are zigzags and irregular, and extremely sensitive nerve ending place formation on finger usually, so paper cuts very inconvenient and may cause the discomfort of certain degree.
Therefore, require to improve paper products, particularly paper base file and press from both sides, thereby reduce or eliminate the generation that paper cuts.
Summary of the invention
At aforementioned and other purpose and advantage, the invention provides a kind of method of production paper material, described paper material has the incised wound application on human skin of reduction and the tendency of tissue.This method comprises provides papermaking batching, forms fibrous web by described papermaking batching, and dry described paper web rolls described paper web to thickness and be about 11.0 to about 18.0mils, density range is about 7.0 to about 12.0lb/3000ft
2/ mil, wherein said batching comprises cellulose fibre, accounts for expansion or the expended microsphere of the about 0.5wt% of butt paper web gross weight to about 5.0wt%, and optional conventional batch additives such as filler, retention agent etc.
Another aspect, the paper material that the present invention relates to be used to produce paper products such as file.This paper material comprises paper web, and described paper web comprises that the cellulose fiber peacekeeping is dispersed in intrastitial expandable microspheres and optional conventional paper additive, and described additive comprises one or more fillers and starch.The density of described paper web is about 7.0 to about 12.0lb/3000ft
2/ mil, thickness are about 11.0 to about 18.0mils.In addition, the edge of described paper web demonstrates improved protective to causing the application on human skin incised wound.
On the other hand, the invention provides a kind of file or cover.Described file or cover comprise paper web, and described paper web comprises wood fibre and is dispersed in intrastitial expandable microspheres.The density of described paper web is about 7.0 to about 12.0lb/3000ft
2/ mil, thickness are about 11.0 to about 18.0mils.Thereby described paper web is cut at file or puts the formation exposed edge, and this edge demonstrates improved protective to causing the application on human skin incised wound.
According to a kind of preferred embodiment of the present invention, the density of paper web is about 7.5lb/3000ft
2/ mil is to about 9.0lb/3000ft
2/ mil.Further preferably the thickness of paper web is about 14.0 to about 16.0mils.The basic weight of paper web is generally about 80lb/3000ft
2To about 300lb/3000ft
2, more preferably about 120lb/3000ft
2To about 150lb/3000ft
2
Microballoon in the paper web generally includes synthetic polymerizing microballoons, and account for butt paper web gross weight about 0.5 to about 5.0wt%, the about 1.0wt% that more preferably accounts for butt paper web gross weight is to about 2.0wt%.Particularly preferably be microballoon and comprise the microballoon that makes by polymeric material, described polymeric material is selected from two or more the combination of methyl methacrylate, neighbour-chlorostyrene, poly-neighbour-chlorostyrene, polyvinyl benzyl chlorine, acrylonitrile, vinylidene chloride, right-tert-butyl styrene, vinylacetate, butylacrylic acid ester, styrene, methacrylic acid, vinyl benzene methyl chloride and aforementioned substances.The preferred swell diameter of microballoon is about 30 to about 60 microns.In addition, might preferably at first in batching, disperse to be in the microballoon of unswollen state in some cases, expand with the dry microballoon that makes of paper web then.
The cellulose fibre of paper web can be provided by hardwood, cork or both mixtures.Fiber in paper web preferably includes about 30wt% to the butt cork fibrous of about 100wt% and the about 70wt% butt hardwood fiber of about 0wt% extremely.
Description of drawings
Further describe above-mentioned and others and advantage of the present invention below in conjunction with accompanying drawing, wherein:
Fig. 1 is a microphoto, has described the edge that utilizes the conventional paper in various cut paper technology cutting backs.
Fig. 2 is another microphoto, has compared the cross cutting paper of conventional cross cutting paper and one embodiment of this invention.
Fig. 3 is a side view, schematically describes the paper matrix of using and cut equipment in reverse cross cutting pattern product.
Fig. 4 is a side view also, schematically describes a kind of testing equipment of simulation paper incised wound finger.
Fig. 5 is a perspective view, has described some aspect of the testing equipment of Fig. 4.
The specific embodiment
The invention provides a kind of paper material, this paper material has improved cut-protection performance, and the edge that is to say paper has incised wound, the worn-off that has reduced or damages the tendency of application on human skin.If do not add explanation in addition, applied here " paper " refers to paper and cardboard, and comprises the two.
Paper provides as paper web usually, and described paper web contains cellulosic pulp fibers, for example by any known suitable boiling, the refining and bleaching operation fiber that is used for the papermaking batching by the combined preparation of palohierror, softwood trees or palohierror and softwood trees.In a kind of preferred embodiment, the cellulose fibre in paper comprises the butt cork fibrous and about 70wt% butt hardwood fiber to about 0wt% of about 30wt% to about 100wt%.In certain embodiments, have at least a part of fiber to provide by non-wooden herbaceous plant, described herbaceous plant comprises mestha, hemp, jute, flax, sisal hemp or abaca, but being not limited thereto, is unpractical or impossible though the restriction of law and other consideration may make application hemp or other fibre source.Described paper can also comprise other conventional additives, for example starch, mineral-filled thing, sizing agent, retention agent and enhancing polymer etc.Adaptable filler is organic and inorganic pigment, for example polymer beads such as polystyrene latex and polymethyl methacrylate, and mineral matter such as calcium carbonate, kaolin and talcum.Except paper pulp fiber and filler, described paper material comprises also being dispersed in and accounts for about 0.5 to about 5.0wt% the expandable microspheres of butt paper web gross weight in fiber and any other component that more preferably about 1.0wt% is the expandable microspheres of about 2.0wt% extremely.Suitable microballoon comprises pellets of synthetic resins, and described resin particle contains the liquid core that is generally spherical.Described resin particle can by methyl methacrylate, neighbour-chlorostyrene, poly-neighbour-chlorostyrene, polyvinyl benzyl chlorine, acrylonitrile, vinylidene chloride, right-tert-butyl styrene, vinylacetate, butylacrylic acid ester, styrene, methacrylic acid, vinyl benzene methyl chloride and aforementioned substances two or more combination and prepare.Preferred resin particle comprises a kind of polymer, and this polymer contains the 65wt% that has an appointment to about 90wt%1,1-dichloroethylene, be preferably about 65wt% to about 75wt%1, the 1-dichloroethylene, and about 35wt% is preferably about 25wt% to about 35wt% acrylonitrile to about 10wt% acrylonitrile.
Microballoon preferably exists with " expansion " attitude in paper web, and promptly having experienced numerical value by " expanding " state in the initial papermaking batching that obtains paper web is about 300% to about 600% diameter expansion.In its initial unswollen state, the center of expended microsphere can comprise the volatile fluid foaming agent, thereby promotes and keep desirable volumetric expansion.Preferably, this reagent is not the solvent of fluoropolymer resin.Particularly preferred foaming agent is an iso-butane, is benchmark with the gross weight of resin particle, the amount of this foaming agent can for about 10wt% to about 25wt%.When being heated to about 80 ℃ during to about 190 ℃ temperature in the dryer unit at paper machine, it is about 30 to about 60 microns that resin particle expand into diameter.Suitable expended microsphere can be by AkzoNobel of Marietta, and Georgia obtains with trade (brand) name EXPANCEL.Expended microsphere and they are applied in common unexamined patent application No.09/770 in paper material, be described in more detail in 340, and this patent application is in application on January 26 calendar year 2001, and its content is here as with reference to introducing.
The calendering described paper after, and carry out any clamping or the compacting as can with apply relevant operation subsequently after, the final thickness of the formed paper of the present invention is preferably about 11.0 to about 18.0mils, more preferably about 14.0 to about 16.0mils.It is about 80lb/3000ft that paper of the present invention also demonstrates basic weight usually
2To about 300lb/3000ft
2, more preferably about 120lb/3000ft
2To about 150lb/3000ft
2The final densities of described paper is that basic weight is generally about 7.0lb/3000ft divided by thickness
2/ mil is to about 12.0lb/3000ft
2/ mil, more preferably about 7.5lb/3000ft
2/ mil is to about 9.0lb/3000ft
2/ mil.Therefore compare with conventional paper, with respect to its weight, paper of the present invention has relatively large thickness.
It is believed that basic weight gives the credit to small spaces a large amount of in the paper with respect to the small part that is reduced to of thickness, and these small spaces are with to be dispersed in interfibrous expandable microspheres relevant, particularly in expansion process, microballoon causes that voidage obviously increases in the material.In addition, paper is fully rolled after the drying process, thereby obtains the thickness of final hope discussed herein, and relevant with the calendering operation any desirable surface adjustment that paper web is carried out.Voidage is obviously increased and make the higher relatively effect that reduces paper density that also can reach of thickness, keep good rigidity simultaneously and other very important characteristic concerning the raw material that is used for file etc.
The method that forms paper material of the present invention comprises the paper batching that provides initial.The cellulose fibre component of described batching suitably is the chemical pulping class, kraft pulp as bleaching, be not limited to kraft pulp though be sure of the present invention, and can use other paper pulp and reach good effect, described other paper pulp have chemical pulp such as sulfite pulp, mechanical pulp as the wood pulp that grinds and other paper pulp type and composition thereof as chemical-mechanical paper pulp and heat-mechanical pulp.
Though be not very crucial for purposes of the invention, but preferably handle paper pulp is bleached according to one or more bleachings known in the art, thereby remove lignin and reach desirable paper pulp brightness, bleaching sequence, the bleaching sequence based on chlorine dioxide, not chloride bleaching sequence, the bleaching sequence that does not contain elemental chlorine, any combination that reaches aforementioned relevant bleaching sequence with other and step or the step variation that comprises based on elemental chlorine handled in described bleaching.
Bleaching is finished and with pulp washing with after filtering, it carries out one or more purification step usually.Paper pulp after will making with extra care is then delivered in the mixing channel, mixes with the additives of various common introducings in the papermaking batching and the paper pulp after filler and other paper pulp such as unbleached paper pulp and/or circulation or the use therein.Agent that additive can comprise so-called " inner starching ", as alkenyl succinic anhydride (ASA), alkyl ketene dimer (AKD) and gum rosin etc., this sizing agent is mainly used to increase the contact angle that polar liquid contacts with the paper surface.Retention agent also can add in this stage.The cationic retention aid agent is preferred; But in batching, also can use anionic retention aids.
In addition, before in the flow box of paper machine, providing batching, in the intermittent pulp proportioning mixture, add polymerizing microballoons.As noted above, be benchmark with the gross dry weight of preparing burden, the microballoon addition is that about 0.5wt% is to about 5.0wt%.Before in joining ingredients mixture, described microballoon can expand in advance or add with its final size basically.But preferably described microballoon joins in the batching with unexpanded state basically at first, forms along with paper web then and makes its expansion when dry, and is as will be explained hereinafter.The effect that will be understood that this expansion is the thickness of final paper products to be increased and the density reduction.In papermaking batching, comprise the expended microsphere and the mixture of the expandable microspheres microballoon of its final size state (or be in basically), thereby the part microballoon is expanded largely in drying process, all the other microballoons then keep essentially identical overall size in dry run, this also within the scope of the invention.
After the preparation, described batching forms the single or multiple lift paper web on paper machine, and described paper machine Fourdrinier paper machine or any other suitable paper machine and those as known in the art will become known paper machine in future.To those skilled in the art, related basic skills is known in the paper-making process on various paper machine configuration, does not therefore here describe in detail.Put it briefly, so-called batching " whitewashing " is ejected on the matrix band or wire netting of porous annular movement from flow box, wherein liquid drains by the aperture on the wire netting gradually, up to the pad that forms paper pulp fiber and other material on wire netting, wherein said batching " whitewashing " contains the aqueous slurry of the paper pulp fiber (common about 0.1 to about 1.0%) that hangs down denseness relatively and is scattered in its interior microballoon and various additive and filler.Thisly still be transferred to wet press from wire netting, carry out associating of more fiber and fiber and moisture therein and further reduce for the pad of hygrometric state or paper web.Then paper web is delivered to initial drier district, most of keeps moisture thereby remove, and further association fibre in paper web.Heat in the dry section also impels the not expandable microspheres that is included in the paper web to expand.
After the initial drying, paper web can further be handled by the application surface quetsch, wherein can be to the more starch of web application, pigment and other additive, and be incorporated into wherein by squeezing action.
After carrying out surperficial starching and dried subsequently, reach desirable final thickness thereby paper rolled, as discussed above, thereby improve slickness and other characteristic of paper web.The calendering operation can realize by steel-steel calender under enough folder district pressure, thereby reach desirable thickness.The final thickness that it should be understood that ply of paper is determined by the selection of folder district pressure to a great extent.
Can be used for multiple office or document purposes according to the formed paper material of the present invention.Particularly, paper of the present invention can be advantageously used in and be formed on Bristol cardboard folder or the cover that is used in the office to deposit with sorted material.Technical staff for field of paper processing, by this file of paper manufacture is known, and generally include the blank page that paper web is cut to suitable dimension and shape by " oppositely " cross cutting, then blank page is folded into suitable file shape, piles up subsequently and packaging step.If wish folding convenient, blank page also can fold folding line in advance.Fold folding line, cutting, fold, pile up and packaging operation is usually used known for those of ordinary skills automaton and carried out to unreeling stand from the paper web material roller to the machinery charging by continuous substantially mode.
In Fig. 3, schematically describe the exemplary apparatus of " oppositely " cross cutting.This cross cutting and so-called " guillotine type " cut paper form contrast.In the guillotine type cutting, the paper that is cut is by one under the paper smooth, fixing surface support, and cutting paper manipulation is undertaken by following process: reduce the removable cutting knife thickness by paper downwards, and enter a groove that is arranged in fixed surface, thereby having definite size, described groove receives cutting knife.The guillotine type cut paper produces level and smooth relatively trimming edge usually; But the guillotine type cut paper is normally unpractiaca concerning high speed, a large amount of cuttings are used.
In reverse cross cutting, cutting knife is fixed on the vertical position, and stretches out from being arranged in the cover for the treatment of the cut paper bottom.Fix and during the cutting position of paper above blade when blade, make contact plate be reduced to the top of paper, and with respect to the edge of a knife platen of cutting knife, thereby make the described paper of blade cuts.
Compare the tendency of skin that has been found that paper with exposed edge of the present invention and file and handle the people of file by the incised wound that other cross cutting goods that it forms demonstrate obvious reduction with cross cutting paper products such as file with the paper of prior art.That is to say that when facing toward the exposed edge pulling of material if other position of finger or health does not have attention, the edge of paper is littler to causing skin incised wound or the possibility that galls.
Not bound by theory, it is believed that the improvement of its anti-cutting performance comes from the combination of the density of its thickness of comparing increase with the paper of prior art and reduction, and these characteristics are to the influence of paper to the reaction of cutting operation.As noted above, the file blank page is cross cutting normally.When the paper matrix with relatively little thickness and high relatively density of the prior art that is used for regular file folder is cut blank page, it is believed that the mould cutter produces clean cut at first on the segment thickness of paper.But before the mould cutter was finished clean cut by paper, remaining paper thickness was by relative sawtooth and irregular mode " explosion " or break.Consequently, resulting file edge is a zigzag, and comprises a large amount of very little but very sharp paper fragments.It is believed that contacting with fragment with these little zigzag sharp edges is to cause paper to cut the main cause of accident.
Though compare with guillotine type cutting, more coarse and zigzag is more obvious by the edge of the resulting paper of cross cutting, the easier realization of die cutting technique in extensive high-speed production, thereby well received in modern Application.
Fig. 1 has described four samples by the conventional paper of different technologies cutting.First sample in microphoto is the paper with the plug-in strip cutting.Two samples describing in the middle of microphoto are the paper with the desk-top die-cutting machine cutting in a kind of laboratory that describes in further detail hereinafter.Last sample in the background of microphoto is the paper by the production-scale die-cutting machine cutting of routine.As can be seen, the conventional paper of cross cutting has sizable roughness in the edge of pattern product.
But it has been determined that it has the tendency of breaking too early of obvious reduction or explosion when the paper matrix with sizable thickness and quite low density of the present invention is cut.Clearly allow described mould cutter to finish clean cut by whole paper thickness, therefore resulting edge has the irregularly shaped and fragment of zigzag that significantly less meeting generation paper cuts.Therefore when processed, has the tendency that the generation paper of obvious reduction cuts according to the prepared file of the present invention.
In Fig. 2, schematically describe the difference of resulting cross cutting trimming edge, described cross cutting edge on the right side of this figure, and described the cross cutting edge of the essentially identical conventional paper of basic weight in the left side of this figure according to the formed paper of the present invention.Paper bag of the present invention is drawn together the expandable microspheres of about 2wt%, and thickness is about 15mils, and density is about 8.7lb/3000ft
2/ mil.Conventional paper does not comprise any microballoon, and its thickness is about 11mils, and density is about 11.3lb/3000ft
2/ mil.The edge of paper of the present invention is obviously more level and smooth on apparent as can be seen, and has the angle sections that tilts more.It is believed that these differences are the reasons that cause the incised wound possibility to reduce.
Following non-restrictive example has been described a plurality of additional aspect of the present invention.If not indicated otherwise, temperature be degree centigrade (℃), percentage is weight percentage (wt%), and the percentage of any pulp additive or moisture is benchmark with the baking box dry weight of total amount of material all.
Embodiment 1
Mixture by about 40% soft wood pulp and about 60% hard wood pulp forms a series of paper, and these paper have about 450 Canadian Standard Freeness, in conjunction with a certain amount of expended microsphere, and is various thickness by calendering.Then the resulting paper that contains expandable microspheres is tested, thereby determined the possibility that its edge hurts finger when it is processed.In order to replace actual application on human skin, to use a rubber finger that is coated by the emgloves material and test, wherein said emgloves material is as artificial " skin ".
The sample that is used to examine or check is to use laboratory shown in Figure 3 die-cutting machine 20 to carry out cross cutting.Described cutting knife comprises an end cover 22 with groove 24.Cutting knife 26 is installed in the bearing 28, and this bearing is fixed in the groove 24, thereby cutting knife is protruded upward.
Die-cutting machine 20 also comprises a top cover 30, and it aligns fixing with the bottom cover by a plurality of bolts or bar 32, and these bolts or bar are received by a plurality of holes corresponding in the top cover 30.Above cutting knife 26, the top cover comprises a contact surface 34.Pattern product 36 to be cut are placed in the gap between cutting knife 26 and the contact surface 34.By hydraulic hammer 38 or the downward press contacts of other suitable drive mechanism surface 34, become two then thereby make pattern product 36 be crushed on the cutting knife and be cut/break.
The incised wound at pattern product edge is inclined in the process of the test that hereinafter is referred to as " incised wound index 30 " test (number of repetition of the test that " 30 " expression is carried out) at and is estimated.The equipment class of the equipment that 30 tests of incised wound index are used and Fig. 4 and Fig. 5 schematic description seemingly.Testing equipment 50 comprises a framework 52, this frame supported pattern product apparatus for fastening 54, and from the described apparatus for fastening 54 of upper suspension.Described apparatus for fastening 54 hangs around axle point 56, and this point allows the angle of apparatus for fastening 54 to change with respect to horizontal level.In such a way, paper can contact with artificial hand's fingering row by different contact angles.Pattern product 60 to be tested are clipped in the apparatus for fastening 54 by vertical substantially position.
The simulation finger is preferably formed by the interior bar of metal or duroplasts, and described interior bar is coated by a kind of some flexible material such as neoprene, and the neoprene layer is preferably coated as the finger from emgloves by emulsion layer.In such a way, this finger has been simulated bone, muscle and the skin layer of actual finger roughly.Though latex and neoprene structure can not show some the accurate tendency when actual finger is hurt, but the generation that it is believed that incised wound accident higher relatively in this structure usually with actual finger in being associated of relative higher incised wound accident, and in this structure the generation of relatively low incised wound accident common with actual finger in being associated of relatively low incised wound accident.
In the described here experiment, the hardness of the neoprene layer that is adopted is about Shore A50, and the thickness of latex " skin " is about 0.004 inch, and latex skin is attached on the neoprene with two-sided tape.For simulated skin better, before test also by it being exposed about 6 hours time and latex is adjusted under about 125 ℃ intensification.Because latex is the material of natural generation, thus latex and by the product of its production in the difference that has between each batch aspect some special properties such as the moisture to a certain degree.Have been found that resulting latex skin demonstrates more uniform one group of character, so the repeatability of result of the test is improved by adjust about 6 hours of latex under heating up.
Applied pattern product are cut into about 1 inch * 6 inches sizes, thereby and the cross cutting edge contact with finger in the alignment of the bottom of apparatus for fastening.Then with respect to the edge of paper pulling simulation finger, stop then and checks latex skin, thereby determine whether to have taken place incised wound, if having, size or size that then definite paper cuts.
Each pattern product is repeated 30 tests altogether.The result is as follows:
Table I
| Sample ID (WMCF) | ％Expancel (wt％) | Basic weight (lb/3000ft 2) | Final thickness (mils) | Density (lb/3000ft 2/mil) | Total incised wound number of times | The incised wound index |
| 1A | 0 | 127 | 11.9 | 10.7 | 19 | 45 |
| 2 | 2 | 108 | 12.0 | 9.0 | 15 | 34 |
| 3 | 3 | 108 | 12.7 | 8.5 | 17 | 29 |
| 6A | 0 | 148 | 12.1 | 12.3 | 22 | 56 |
| 6B | 0 | 182 | 14.5 | 12.6 | 18 | 30 |
| 6C | 0 | 200 | 16.2 | 12.4 | 13 | 16 |
| 124 | 2 | 131 | 15.8 | 8.3 | 7 | 15 |
| 143 | 2 | 143 | 17.0 | 8.4 | 3 | 5 |
Except measuring incised wound number of times (in 30 repeated tests), the size of each incised wound also characterizes with the grade of 1-5,1 expression " very little " and 5 represent " greatly ".Use these data, determine to hurt index by adding with the product of the order of severity of the incised wound number of times of each size level and 1-5 level incised wound.Resulting result is as shown in Table II:
Table II
| Sample ID | Total incised wound number of times | (5) greatly | In+(4) | In (3) | Little (2) | Very little (1) | The incised wound index |
| 1A | 19 | 0 | 3 | 5 | 7 | 4 | 45 |
| 2 | 15 | 0 | 1 | 3 | 10 | 1 | 34 |
| 3 | 17 | 0 | 0 | 1 | 10 | 6 | 29 |
| 6A | 22 | 0 | 4 | 8 | 6 | 4 | 56 |
| 6B | 18 | 0 | 0 | 6 | 0 | 12 | 30 |
| 6C | 13 | 0 | 0 | 0 | 3 | 10 | 16 |
| 124 | 7 | 0 | 0 | 3 | 2 | 2 | 15 |
| 143 | 3 | 0 | 0 | 0 | 2 | 1 | 5 |
As what in sample 1-3 and 6A, can see, change the density of paper by the expandable microspheres that add different amounts, but the thickness of paper roughly is held constant at about 12mils.These samples confirm that the density reduction relevant with introducing microballoon causes the corresponding reduction with the order of severity of number of times of the incised wound that paper produces.
In sample 6A-6C, paper density keeps constant to be about 12.5lb/3000ft
2/ mil, but the thickness of paper changes.The result confirms concerning the paper that contains microballoon, increases thickness and reduces the incised wound number of times and hurt between the order of severity clearly relevant.
At last, in sample 124 and 143, the paper of being produced contains microballoon, and reduces the density of paper simultaneously and increase thickness.The result shows that incised wound number of times and weight average incised wound time number average obviously are lowered to the utmost point low level.Therefore, relevant thickness increases and the density reduction all can reduce incised wound separately to a certain extent though clearly add with microballoon, but the two combination shows that it provides a kind of collaborative reduction effect aspect incised wound, and this is very wondrous and do not reckon with.
Embodiment 2
A series of paper that application is formed by second kind of intermittent pulp proportioning carry out testing like the category, and described second kind of intermittent pulp proportioning formed by the mixture of about 40% soft wood pulp and about 60% hard wood pulp, and have about 450 Canadian Standard Freeness.In these trials, produced two groups of paper, and every group of paper all has approximately identical basic weight.Concerning one group of paper, the order of magnitude of basic weight is about 130lb/3000ft
2, and concerning another group paper, basic weight is about 150lb/3000ft
2In each group, add the microballoon of different amounts, and change the thickness of resulting paper.Equally, every kind of sample is carried out 30 repeated tests and measure the incised wound tendency.The results are shown among Table III and the IV.
Table III
| Sample ID | ％Expancel (wt％) | Basic weight (lb/3000ft 2) | Final thickness (Mils) | Density (lb/3000ft 2/mil) | Total incised wound number of times | The incised wound index |
| 1 | 0 | 129 | 12.1 | 10.7 | 21 | 77 |
| 3 | 2 | 133 | 15.5 | 8.58 | 15 | 34 |
| 4 | 3 | 128 | 17.2 | 7.46 | 10 | 16 |
| 5 | 0 | 153 | 13.8 | 11.1 | 25 | 80 |
| 7 | 2 | 149 | 14.6 | 10.2 | 16 | 36 |
| 8 | 3 | 150 | 18.4 | 8.15 | 7 | 12 |
These results show the increase along with the microballoon amount, but wherein basic weight keeps roughly the same, always hurt number of times and weight average incised wound time number average and have tangible reduction tendency.In the amount that keeps increasing under the identical situation of basic weight microballoon, can cause thickness increase, density reduction and incised wound number of times and the order of severity all to reduce as can be seen.
Table IV
| Sample ID | Total incised wound number of times | (5) greatly | In+(4) | In (3) | Little (2) | Very little (1) | The incised wound index |
| 1 | 21 | 7 | 5 | 5 | 3 | 1 | 77 |
| 3 | 15 | 0 | 2 | 1 | 8 | 3 | 34 |
| 4 | 10 | 0 | 0 | 0 | 6 | 4 | 16 |
| 5 | 25 | 2 | 9 | 6 | 8 | 0 | 80 |
| 7 | 16 | 0 | 0 | 4 | 12 | 0 | 36 |
| 8 | 7 | 0 | 0 | 0 | 5 | 2 | 12 |
Embodiment 3
A series of paper that application is formed by the third intermittent pulp proportioning carry out testing like the category, and described the third intermittent pulp proportioning comprises about 35% cork fibrous and about 65% hardwood fiber.Equally, every kind of sample is carried out 30 repeated tests and measure the incised wound tendency.The results are shown in the Table V.
Table V
| Sample ID | ％Expancel (wt％) | Basic weight (lb/3000ft 2) | Final thickness (Mils) | Density (lb/3000ft 2/mil) | Total incised wound number of times | The incised wound index |
| The 124lb contrast | 0 | 129 | 11.39 | 11.34 | 28 | 116 |
| The 143lb contrast | 0 | 148 | 11.57 | 12.76 | 30 | 95 |
| 4 | 2 | 128 | 14.83 | 8.61 | 15 | 21 |
| 6 | 2 | 125 | 15.21 | 8.22 | 7 | 9 |
| 7 | 2 | 124 | 14.94 | 8.28 | 5 | 5 |
| 8 | 2 | 125 | 15.08 | 8.27 | 15 | 15 |
| 9 | 2 | 125 | 14.56 | 8.62 | 8 | 9 |
In these trials, producing and contain the paper of expandable microspheres, is about 124lb/3000ft thereby target basis weight is provided
2, and compare with two Comparative Examples that do not contain microballoon and form, the basic weight of wherein said Comparative Examples is respectively 124lb/3000ft
2And 143lb/3000ft
2Equally, compare with contrast paper, the expandable microspheres sample demonstrates its incised wound tendency once more obviously to be reduced.In each case, the incised wound sum reduces about 50% or more, and the reduction of weight average incised wound number of times further is lowered.
Described various aspects of the present invention and preferred embodiment thereof now, to those skilled in the art, will appreciate that in the essence of claims and scope, may have multiple improvement, change and substitute.
Claims (32)
1. paper material that is used to produce paper products, described paper material comprises paper web, and described paper web comprises cellulose fiber peacekeeping expandable microspheres, the density of described paper web is 7.0-12.0lb/3000ft
2/ mil, and its thickness is 11.0-18.0mils after the calendering, the swell diameter of wherein said microballoon is the 30-60 micron, the reverse cross cutting edge of described paper web has improved protective to causing the application on human skin incised wound.
2. the paper material of claim 1, the density of wherein said paper web is 7.5-9.0lb/3000ft
2/ mil.
3. the paper material of claim 1, the thickness of wherein said paper web is 14.0-16.0mils.
4. the paper material of claim 1, wherein the expandable microspheres in described paper web comprises the synthesized polymer microballoon, and accounts for butt paper web gross weight 0.5-5.0wt%.
5. the paper material of claim 1, wherein the expandable microspheres in described paper web comprises the synthesized polymer microballoon, and accounts for butt paper web gross weight 1.0-2.0wt%.
6. the paper material of claim 1, the basic weight of wherein said paper web is 80-300lb/3000ft
2
7. the paper material of claim 1, the basic weight of wherein said paper web is 120-150lb/3000ft
2
8. the paper material of claim 1, wherein the expandable microspheres in described paper web comprises by being selected from the microballoon that following material is made: two or more the combination of methyl methacrylate, neighbour-chlorostyrene, poly-neighbour-chlorostyrene, polyvinyl benzyl chlorine, acrylonitrile, vinylidene chloride, right-tert-butyl styrene, vinylacetate, butylacrylic acid ester, styrene, methacrylic acid, vinyl benzene methyl chloride and aforementioned substances.
9. the paper material of claim 1, wherein the fiber in described paper web comprises the butt cork fibrous of 30-100wt% and the butt hardwood fiber of 70-0wt%.
10. the paper material of claim 1, wherein microballoon is dispersed in the batching with unexpanded state, and expands with paper web is dry subsequently.
11. the paper material of claim 1, wherein when analyzing according to 30 tests of incised wound index, described paper material demonstrates and is lower than 40 incised wound index.
12. method for preparing paper material, described paper material has the tendency of the incised wound application on human skin of reduction, described method comprises provides the papermaking batching, form fibrous web, dry described paper web by described papermaking batching, and to roll described paper web to thickness be that 11.0-18.0mils, density range are 7.0-12.0lb/3000ft
2/ mil, and thereby the reverse described paper web of cross cutting provides the edge of at least one tendency of the incised wound application on human skin with reduction, wherein said batching comprises cellulose fibre and expands or expended microsphere based on butt paper web gross weight meter 0.5-5.0wt% that the swell diameter of described microballoon is the 30-60 micron.
13. the method for claim 12, the density of wherein said paper web are 7.5-9.0lb/3000ft
2/ mil.
14. the method for claim 12, the thickness of wherein said paper web are 14.0-16.0mils.
15. the method for claim 12, wherein the microballoon in described paper web comprises the synthesized polymer microballoon, and accounts for butt paper web gross weight 1.0-2.0wt%.
16. the method for claim 12, the basic weight of wherein said paper web are 80-3000lb/3000ft
2
17. the method for claim 12, the basic weight of wherein said paper web are 120-150lb/3000ft
2
18. the method for claim 12, wherein the microballoon in described paper web comprises by being selected from the microballoon that following material is made: two or more the combination of methyl methacrylate, neighbour-chlorostyrene, poly-neighbour-chlorostyrene, polyvinyl benzyl chlorine, acrylonitrile, vinylidene chloride, right-tert-butyl styrene, vinylacetate, butylacrylic acid ester, styrene, methacrylic acid, vinyl benzene methyl chloride and aforementioned substances.
19. the method for claim 12, wherein the fiber in described paper web comprises the butt cork fibrous of 30-100wt% and the butt hardwood fiber of 70-0wt%.
20. the method for claim 12, wherein microballoon is dispersed in the fiber with unexpanded state, and expands with paper web is dry subsequently.
21. the method for claim 12, wherein when analyzing according to 30 tests of incised wound index, described paper web demonstrates and is lower than 40 incised wound index.
22. file or cover, described file or cover comprise paper web, and described paper web comprises wood fibre and is dispersed in intrastitial expandable microspheres, and the density of described paper web is 7.0-12.0lb/3000ft
2/ mil, its thickness is 11.0-18.0mils, the swell diameter of wherein said microballoon is the 30-60 micron, described paper web is reversed cross cutting thereby the blank page with exposed edge is provided, and this blank page forms file or cover, and the edge of wherein said file or cover has improved protective to causing the application on human skin incised wound.
23. the file of claim 22 or cover, the density of wherein said paper web are 7.5-9.0lb/3000ft
2/ mil.
24. the file of claim 22 or cover, the thickness of wherein said paper web are 14.0-16.0mils.
25. the file of claim 22 or cover, wherein the expandable microspheres in described paper web comprises the synthesized polymer microballoon, and accounts for butt paper web gross weight 0.5-5.0wt%.
26. the file of claim 22 or cover, wherein the expandable microspheres in described paper web comprises the synthesized polymer microballoon, and accounts for butt paper web gross weight 1.0-2.0wt%.
27. the file of claim 22 or cover, the basic weight of wherein said paper web are 80-300lb/3000ft
2
28. the file of claim 22 or cover, the basic weight of wherein said paper web are 120-150lb/3000ft
2
29. the file of claim 22 or cover, wherein the expandable microspheres in described paper web comprises by being selected from the microballoon that following material is made: two or more the combination of methyl methacrylate, neighbour-chlorostyrene, poly-neighbour-chlorostyrene, polyvinyl benzyl chlorine, acrylonitrile, vinylidene chloride, right-tert-butyl styrene, vinylacetate, butylacrylic acid ester, styrene, methacrylic acid, vinyl benzene methyl chloride and aforementioned substances.
30. the file of claim 22 or cover, wherein the fiber in described paper web comprises the butt cork fibrous of 30-100wt% and the butt hardwood fiber of 70-0wt%.
31. the file of claim 22 or cover, wherein microballoon is dispersed in the wood fibre with unexpanded state, and expands with paper web is dry subsequently.
32. the file of claim 22 or cover, wherein when analyzing according to 30 tests of incised wound index, described file or cover demonstrate and are lower than 40 incised wound index.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US28298301P | 2001-04-11 | 2001-04-11 | |
| US60/282,983 | 2001-04-11 |
Related Child Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2006100898532A Division CN1861902B (en) | 2001-04-11 | 2002-04-11 | Cut resistant paper and paper articles and method for making same |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1507519A CN1507519A (en) | 2004-06-23 |
| CN1265055C true CN1265055C (en) | 2006-07-19 |
Family
ID=23083982
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN02809521.9A Expired - Lifetime CN1265055C (en) | 2001-04-11 | 2002-04-11 | Cut resistant paper and paper articles and method for making same |
| CN2006100898532A Expired - Lifetime CN1861902B (en) | 2001-04-11 | 2002-04-11 | Cut resistant paper and paper articles and method for making same |
Family Applications After (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2006100898532A Expired - Lifetime CN1861902B (en) | 2001-04-11 | 2002-04-11 | Cut resistant paper and paper articles and method for making same |
Country Status (11)
| Country | Link |
|---|---|
| EP (1) | EP1381734B1 (en) |
| JP (1) | JP4197253B2 (en) |
| CN (2) | CN1265055C (en) |
| AT (1) | ATE553251T1 (en) |
| AU (1) | AU2002252689B2 (en) |
| BR (1) | BR0208882A (en) |
| CA (1) | CA2443904C (en) |
| ES (1) | ES2384957T3 (en) |
| MX (1) | MXPA03009308A (en) |
| NZ (1) | NZ528925A (en) |
| WO (1) | WO2002084026A1 (en) |
Families Citing this family (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20060231227A1 (en) * | 2000-01-26 | 2006-10-19 | Williams Richard C | Paper and paper articles and method for making same |
| CA2398451C (en) * | 2000-01-26 | 2008-04-29 | International Paper Company | Low density paperboard articles |
| US6866906B2 (en) | 2000-01-26 | 2005-03-15 | International Paper Company | Cut resistant paper and paper articles and method for making same |
| EP1381476B1 (en) | 2001-04-11 | 2010-03-17 | International Paper Company | Paper articles exhibiting long term storageability |
| US7279071B2 (en) | 2001-04-11 | 2007-10-09 | International Paper Company | Paper articles exhibiting water resistance and method for making same |
| AU2004236484B2 (en) * | 2003-05-06 | 2008-03-06 | International Paper Company | A process for preparing sized paper and paperboard |
| JP2007521410A (en) * | 2003-06-26 | 2007-08-02 | アクゾ ノーベル エヌ．ブイ． | Microsphere |
| CN106398256B (en) * | 2016-08-31 | 2019-04-05 | 西能化工科技(上海)有限公司 | A kind of lightweight paper material and preparation method thereof comprising microspheres |
| CN106835785B (en) * | 2016-12-19 | 2019-03-22 | 西能化工科技(上海)有限公司 | The preparation method of paper pulp comprising expandable microspheres and its purposes in speciality paper |
| WO2020077466A1 (en) * | 2018-10-19 | 2020-04-23 | Cascades Canada Ulc | Cupstock with rim-formation index and associated methods and rimmed cup products |
Family Cites Families (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| BE661981A (en) | 1964-04-03 | |||
| US3533908A (en) * | 1967-05-19 | 1970-10-13 | Brown Co | Porous paperboard sheet having plastic microspheres therein |
| BE758373A (en) * | 1967-11-27 | 1971-05-03 | Dow Chemical Co | PAPER MANUFACTURING PROCESS |
| US4179546A (en) * | 1972-08-28 | 1979-12-18 | The Dow Chemical Company | Method for expanding microspheres and expandable composition |
| US4133688A (en) * | 1975-01-24 | 1979-01-09 | Felix Schoeller, Jr. | Photographic carrier material containing thermoplastic microspheres |
| US4324753A (en) * | 1980-11-03 | 1982-04-13 | Gill Robert A | Method of producing an air laid paper web utilizing microencapsulated hydrogen bond promoting material |
| SE8204595L (en) * | 1982-08-05 | 1984-02-06 | Kema Nord Ab | PROCEDURE FOR THE PREPARATION OF HEART-IMPREGNATED FIBER COMPOSITION MATERIAL |
| SE453206B (en) * | 1983-10-21 | 1988-01-18 | Valmet Paper Machinery Inc | HYGIENE PAPER COAT, PROCEDURE FOR PREPARING THEREOF AND USING EXPANDABLE MICROSPHERES OF THERMOPLASTIC IN PREPARING HYGIENE PAPER COAT |
| US5125996A (en) * | 1990-08-27 | 1992-06-30 | Eastman Kodak Company | Three dimensional imaging paper |
| JP2611612B2 (en) * | 1992-11-18 | 1997-05-21 | 王子製紙株式会社 | Cushioned paper tube |
| US5342649A (en) * | 1993-01-15 | 1994-08-30 | International Paper Company | Coated base paper for use in the manufacture of low heat thermal printing paper |
| GB2307487B (en) * | 1995-11-22 | 1999-03-17 | Portals Ltd | Process for producing security paper |
| US6379497B1 (en) * | 1996-09-20 | 2002-04-30 | Fort James Corporation | Bulk enhanced paperboard and shaped products made therefrom |
| CA2398451C (en) * | 2000-01-26 | 2008-04-29 | International Paper Company | Low density paperboard articles |
-
2002
- 2002-04-11 CN CN02809521.9A patent/CN1265055C/en not_active Expired - Lifetime
- 2002-04-11 ES ES02721777T patent/ES2384957T3/en not_active Expired - Lifetime
- 2002-04-11 EP EP02721777A patent/EP1381734B1/en not_active Expired - Lifetime
- 2002-04-11 NZ NZ528925A patent/NZ528925A/en not_active IP Right Cessation
- 2002-04-11 WO PCT/US2002/012264 patent/WO2002084026A1/en active IP Right Grant
- 2002-04-11 BR BR0208882-7A patent/BR0208882A/en not_active Application Discontinuation
- 2002-04-11 CA CA002443904A patent/CA2443904C/en not_active Expired - Lifetime
- 2002-04-11 AU AU2002252689A patent/AU2002252689B2/en not_active Expired
- 2002-04-11 JP JP2002581754A patent/JP4197253B2/en not_active Expired - Fee Related
- 2002-04-11 AT AT02721777T patent/ATE553251T1/en active
- 2002-04-11 MX MXPA03009308A patent/MXPA03009308A/en active IP Right Grant
- 2002-04-11 CN CN2006100898532A patent/CN1861902B/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| EP1381734B1 (en) | 2012-04-11 |
| ES2384957T3 (en) | 2012-07-16 |
| EP1381734A4 (en) | 2004-12-15 |
| EP1381734A1 (en) | 2004-01-21 |
| CN1861902A (en) | 2006-11-15 |
| CA2443904A1 (en) | 2002-10-24 |
| CN1507519A (en) | 2004-06-23 |
| JP2004536973A (en) | 2004-12-09 |
| ATE553251T1 (en) | 2012-04-15 |
| BR0208882A (en) | 2004-06-29 |
| CA2443904C (en) | 2009-04-07 |
| WO2002084026A1 (en) | 2002-10-24 |
| CN1861902B (en) | 2012-08-22 |
| JP4197253B2 (en) | 2008-12-17 |
| NZ528925A (en) | 2005-05-27 |
| MXPA03009308A (en) | 2005-07-01 |
| AU2002252689B2 (en) | 2006-10-19 |
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