US2127896A - Method of producing elastic objects from polyvinyl alcohols - Google Patents
Method of producing elastic objects from polyvinyl alcohols Download PDFInfo
- Publication number
- US2127896A US2127896A US120635A US12063537A US2127896A US 2127896 A US2127896 A US 2127896A US 120635 A US120635 A US 120635A US 12063537 A US12063537 A US 12063537A US 2127896 A US2127896 A US 2127896A
- Authority
- US
- United States
- Prior art keywords
- weight
- mixture
- parts
- water
- polyvinyl alcohols
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
- 229920002451 polyvinyl alcohol Polymers 0.000 title description 21
- 235000019422 polyvinyl alcohol Nutrition 0.000 title description 20
- 238000000034 method Methods 0.000 title description 16
- 239000000203 mixture Substances 0.000 description 20
- 239000004902 Softening Agent Substances 0.000 description 16
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 14
- 239000004372 Polyvinyl alcohol Substances 0.000 description 13
- PEDCQBHIVMGVHV-UHFFFAOYSA-N Glycerine Chemical compound OCC(O)CO PEDCQBHIVMGVHV-UHFFFAOYSA-N 0.000 description 8
- 238000003825 pressing Methods 0.000 description 7
- 239000000126 substance Substances 0.000 description 6
- 238000001035 drying Methods 0.000 description 4
- 235000011187 glycerol Nutrition 0.000 description 4
- LYCAIKOWRPUZTN-UHFFFAOYSA-N Ethylene glycol Chemical compound OCCO LYCAIKOWRPUZTN-UHFFFAOYSA-N 0.000 description 3
- 229920002472 Starch Polymers 0.000 description 3
- 239000003292 glue Substances 0.000 description 3
- 238000010438 heat treatment Methods 0.000 description 3
- 235000019698 starch Nutrition 0.000 description 3
- 239000008107 starch Substances 0.000 description 3
- 238000004512 die casting Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000012528 membrane Substances 0.000 description 2
- 238000012856 packing Methods 0.000 description 2
- QBUKAFSEUHGMMX-MTJSOVHGSA-N (5z)-5-[[3-(1-hydroxyethyl)thiophen-2-yl]methylidene]-10-methoxy-2,2,4-trimethyl-1h-chromeno[3,4-f]quinolin-9-ol Chemical group C1=CC=2NC(C)(C)C=C(C)C=2C2=C1C=1C(OC)=C(O)C=CC=1O\C2=C/C=1SC=CC=1C(C)O QBUKAFSEUHGMMX-MTJSOVHGSA-N 0.000 description 1
- 229920001353 Dextrin Polymers 0.000 description 1
- 239000004375 Dextrin Substances 0.000 description 1
- 238000010924 continuous production Methods 0.000 description 1
- 235000019425 dextrin Nutrition 0.000 description 1
- 229940093476 ethylene glycol Drugs 0.000 description 1
- 238000001125 extrusion Methods 0.000 description 1
- 238000007493 shaping process Methods 0.000 description 1
- 230000035900 sweating Effects 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C43/00—Compression moulding, i.e. applying external pressure to flow the moulding material; Apparatus therefor
- B29C43/003—Compression moulding, i.e. applying external pressure to flow the moulding material; Apparatus therefor characterised by the choice of material
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K5/00—Use of organic ingredients
- C08K5/0008—Organic ingredients according to more than one of the "one dot" groups of C08K5/01 - C08K5/59
- C08K5/0016—Plasticisers
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
- B29K2029/00—Use of polyvinylalcohols, polyvinylethers, polyvinylaldehydes, polyvinylketones or polyvinylketals or derivatives thereof as moulding material
- B29K2029/04—PVOH, i.e. polyvinyl alcohol
Definitions
- My invention relates to the production of elastic articles from a polyvinyl alcohol.
- Hitherto elastic articles f. e. hoses, threads, bands, packings, membranes, etc.
- Hitherto elastic articles f. e. hoses, threads, bands, packings, membranes, etc.
- the dryingprocess may, according to the form of the article, take up to several days, and as the shrinkage can not be exactly predetermined so that the size of the article in its final form is often different from the desired size, the use of an excess of water is not only very disadvantageous but it makes it even impossible to produce articles having a considerable wall thickness as the drying of such articles would take an economically unbearable space of time.
- the pressing operation can be performed by means of a worm press or piston-press in order to enable the continuous production of hoses, bands and threads; or a stamping-press may be used for producing packings, membranes and the like.
- the production of the last mentioned articles can also be effected by the known die casting process.
- organic filling substances may be used as with the known methods; they may be soluble in water and glycerin or insoluble. I1 soluble filling substances are used, such as glue, starch, dextrin or the like, then the percentage of softening agents admixed to the polyvinyl alcohol must be increased according to the added quantity of filling substances.
- composition of the mixtures to be used with the method according to the invention shall be illustrated by the following examples:
- a method of producing elastic objects from polyvinyl alcohols comprising preparing a mixture containing a polyvinyl alcohol, 15 to 50% by weight of softening agents and not more water than the quantity of softening agent present in the mixture is able to withhold, working up such mixture into a kneadable mass, pressing such mass into the desired form and heating such pressed mass to a temperature of to C.
- a method of producing elastic objects from polyvinyl alcohols comprising preparing a mixture containing a polyvinyl alcohol, 15 to 50% by weight of softening agents and not more water than the quantity of softening agent present in the mixture is able to withhold, working up such mixture into a kneadable mass, shaping such mass into the desired form in the cold state and subsequently subjecting such shaped mass to pressure at a temperature between 135 and 180 C.
- a method of producing elastic objects from polyvinyl alcohols comprising preparing a mixture containing a polyvinyl alcohol, 15 to 50% by weight of softening agents, organic filling substances, and not more water than the quantity of softening agent present in the mixture is able to withhold, working up such mixture into a kneadable mass, pressing such mass into the desired form and heating such pressed mass to a tempereture of 135 to 180 C.
- a method of producing elastic objects from polyvinyl alcohols comprising preparing a mixture containing a polyvinyl alcohol, 15 to 50% by weight of softening agents, inorganic filling substances, and not more water than the quantity 0! softening agent present in the mixture is able 10 to withhold, working up such mixture into a kneadable mass, pressing such mass into the desired form and heating such pressed mass to a temperature of 135 to 180 C.
Description
\ Patented Aug. 23, I938 UNITED STATES METHOD OF PRODUCING ELASTIC OBJECTS FROM POLYVINYL ALCOHOLS Herbert Vohrer, Berlin, Germany No Drawing. Application January 14, 1937, Se-
rial 1936 '1 Claims.
My invention relates to the production of elastic articles from a polyvinyl alcohol.
Hitherto elastic articles, f. e. hoses, threads, bands, packings, membranes, etc., have been produced from polyvinyl alcohols insoluble in cold water by pressing a mixture of polyvinyl alcohol and softening agents, and a quantity of water exceeding the quantity which the used softening agents are able to withhold at temperatures from 70 to 130 C. Thereafter the ready article had to be freed from the excess of water contained therein by drying and this process caused a certain shrinkage of the article. As the dryingprocess may, according to the form of the article, take up to several days, and as the shrinkage can not be exactly predetermined so that the size of the article in its final form is often different from the desired size, the use of an excess of water is not only very disadvantageous but it makes it even impossible to produce articles having a considerable wall thickness as the drying of such articles would take an economically unbearable space of time.
It has been proposed to replace the excess of water by a surplus of softening agents, however, herewith the high percentage of softening agents in the articles caused such a strong "sweating" of them in moist air that this process could not be used in practice.
30 Now I have found that the usual mixture of a polyvinyl alcohol with 15 to 50 parts by weight of softening agents can be used for producing elastic articles even without any water or with just that quantity of water which the softening agents are able to withhold, if the temperature at which the pressing is effected, is raised to between 135 and 180 C. The pulverized mixture of polyvinyl alcohol and softening agents can either be worked at this temperature into a kneadable caoutchouclike mass and then be pressed into the desired form, or it can be formed in the cold state and then be pressed at the above mentioned temperature. In both cases articles of any form and with any desired wall-thickness can be obtained which do not need any drying but are completely finished as soon as they leave the press. The pressing operation can be performed by means of a worm press or piston-press in order to enable the continuous production of hoses, bands and threads; or a stamping-press may be used for producing packings, membranes and the like. The production of the last mentioned articles can also be effected by the known die casting process.
In producingarticles from polyvinyl-alcohols according to my method the same organic or in- In Germany August 13,
organic filling substances may be used as with the known methods; they may be soluble in water and glycerin or insoluble. I1 soluble filling substances are used, such as glue, starch, dextrin or the like, then the percentage of softening agents admixed to the polyvinyl alcohol must be increased according to the added quantity of filling substances.
The composition of the mixtures to be used with the method according to the invention shall be illustrated by the following examples:
I. parts by weight of. polyvinyl alcohol, 40 parts by weight of glycerin.
II. 55 parts by weight of polyvinyl alcohol, 10 parts by weight of a 50% solution of glue in water, 35 parts by weight of ethylene-glycol.
III. 40 parts by weight of polyvinyl alcohol, 20 parts by weight of starch, 10 parts by weight of a 50% solution of glue in water, 30 parts by weight of glycerin.
IV. 25 parts by weight of polyvinyl alcohol, 25
parts by weight of starch, 25 parts by weight of inorganic filling substances, and 25 parts by weight of glycerin.
What I claim is:
1. A method of producing elastic objects from polyvinyl alcohols comprising preparing a mixture containing a polyvinyl alcohol, 15 to 50% by weight of softening agents and not more water than the quantity of softening agent present in the mixture is able to withhold, working up such mixture into a kneadable mass, pressing such mass into the desired form and heating such pressed mass to a temperature of to C.
2. A method according to claim 1 in which said mixture is worked up into a kneadable mass at a temperature between 135 and 180 C. prior to the pressing operation.
3. A method of producing elastic objects from polyvinyl alcohols comprising preparing a mixture containing a polyvinyl alcohol, 15 to 50% by weight of softening agents and not more water than the quantity of softening agent present in the mixture is able to withhold, working up such mixture into a kneadable mass, shaping such mass into the desired form in the cold state and subsequently subjecting such shaped mass to pressure at a temperature between 135 and 180 C.
4. A method of producing elastic objects from polyvinyl alcohols comprising preparing a mixture containing a polyvinyl alcohol, 15 to 50% by weight of softening agents, organic filling substances, and not more water than the quantity of softening agent present in the mixture is able to withhold, working up such mixture into a kneadable mass, pressing such mass into the desired form and heating such pressed mass to a tempereture of 135 to 180 C.
5. A method of producing elastic objects from polyvinyl alcohols comprising preparing a mixture containing a polyvinyl alcohol, 15 to 50% by weight of softening agents, inorganic filling substances, and not more water than the quantity 0! softening agent present in the mixture is able 10 to withhold, working up such mixture into a kneadable mass, pressing such mass into the desired form and heating such pressed mass to a temperature of 135 to 180 C.
6. A method according to claim 1 in which said mixture is pressed by the die casting process.
7. A method according to claim 1 in which said mixture is pressed by extrusion through a heated nozzle.
Z'ERBERT VQHRER.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE493561X | 1936-08-13 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| US2127896A true US2127896A (en) | 1938-08-23 |
Family
ID=6544579
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| US120635A Expired - Lifetime US2127896A (en) | 1936-08-13 | 1937-01-14 | Method of producing elastic objects from polyvinyl alcohols |
Country Status (3)
| Country | Link |
|---|---|
| US (1) | US2127896A (en) |
| FR (1) | FR825552A (en) |
| GB (1) | GB493561A (en) |
Cited By (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2563661A (en) * | 1948-09-16 | 1951-08-07 | Johnson & Son Inc S C | Fabric-treating composition and method of preparation |
| US2565686A (en) * | 1948-09-16 | 1951-08-28 | Johnson & Son Inc S C | Fabric-treating composition and method of preparation |
| US2618796A (en) * | 1949-05-05 | 1952-11-25 | United Shoe Machinery Corp | Stiffening uppers of shoes |
| US2650170A (en) * | 1951-01-27 | 1953-08-25 | Du Pont | Coating material, coated fabric, and process for producing it |
| US2917045A (en) * | 1958-12-10 | 1959-12-15 | Air Reduction | Face mask and similar devices having body-conforming means |
| US3044974A (en) * | 1958-05-26 | 1962-07-17 | Kurashiki Rayon Co | Method of preparing polyvinyl alcohol filaments containing starch or derivatives thereof |
| US3143518A (en) * | 1963-06-21 | 1964-08-04 | United Resin Products Inc | Hot melt polyvinyl alcohol adhesive plasticized with propylene glycol |
| US3442848A (en) * | 1966-03-15 | 1969-05-06 | Kuraray Co | Polyvinyl alcohol sizing compositions containing deliquescent compounds and plasticizers |
| US3472804A (en) * | 1966-01-29 | 1969-10-14 | Ledoga Spa | Insoluble films based on polyvinyl alcohol and process for the preparation thereof |
| US4323492A (en) * | 1978-03-23 | 1982-04-06 | Hoechst Aktiengesellschaft | Plasticizer containing polyvinyl alcohol granules |
| US4438139A (en) | 1979-08-14 | 1984-03-20 | Key Pharmaceuticals, Inc. | Polymeric diffusion matrix containing estrogens |
| US4460562A (en) * | 1982-01-06 | 1984-07-17 | Key Pharmaceuticals, Inc. | Polymeric diffusion matrix containing propranolol |
| US4466953A (en) * | 1979-08-14 | 1984-08-21 | Key Pharmaceuticals, Inc. | Polymeric diffusion matrix |
| AU661872B2 (en) * | 1991-11-07 | 1995-08-10 | Novamont S.P.A. | A method of producing starch based-biodegradable thermoplastic compositions comprising plasticised polyvinylalcohol |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2693438A (en) * | 1951-02-21 | 1954-11-02 | Norwich Pharma Co | Preformed, nonadherent films for application to open lesions |
| EP0083370A1 (en) * | 1981-07-08 | 1983-07-13 | Key Pharmaceuticals, Inc. | Polymeric diffusion matrix containing 5-((3,4-dimethoxyphenethyl)methylamino)-2-(3,4-dimethoxyphenyl)-2-isopropylvaleronitrile |
| JPS58501034A (en) * | 1981-07-08 | 1983-06-30 | キイ・フア−マシユ−テイカルズ・インコ−ポレイテツド | Polymer diffusion matrix containing propranolol |
-
1937
- 1937-01-14 US US120635A patent/US2127896A/en not_active Expired - Lifetime
- 1937-04-17 GB GB11008/37A patent/GB493561A/en not_active Expired
- 1937-08-13 FR FR825552D patent/FR825552A/en not_active Expired
Cited By (17)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2563661A (en) * | 1948-09-16 | 1951-08-07 | Johnson & Son Inc S C | Fabric-treating composition and method of preparation |
| US2565686A (en) * | 1948-09-16 | 1951-08-28 | Johnson & Son Inc S C | Fabric-treating composition and method of preparation |
| US2618796A (en) * | 1949-05-05 | 1952-11-25 | United Shoe Machinery Corp | Stiffening uppers of shoes |
| US2650170A (en) * | 1951-01-27 | 1953-08-25 | Du Pont | Coating material, coated fabric, and process for producing it |
| US3044974A (en) * | 1958-05-26 | 1962-07-17 | Kurashiki Rayon Co | Method of preparing polyvinyl alcohol filaments containing starch or derivatives thereof |
| US2917045A (en) * | 1958-12-10 | 1959-12-15 | Air Reduction | Face mask and similar devices having body-conforming means |
| US3143518A (en) * | 1963-06-21 | 1964-08-04 | United Resin Products Inc | Hot melt polyvinyl alcohol adhesive plasticized with propylene glycol |
| US3472804A (en) * | 1966-01-29 | 1969-10-14 | Ledoga Spa | Insoluble films based on polyvinyl alcohol and process for the preparation thereof |
| US3442848A (en) * | 1966-03-15 | 1969-05-06 | Kuraray Co | Polyvinyl alcohol sizing compositions containing deliquescent compounds and plasticizers |
| US4323492A (en) * | 1978-03-23 | 1982-04-06 | Hoechst Aktiengesellschaft | Plasticizer containing polyvinyl alcohol granules |
| US4542178A (en) * | 1978-03-23 | 1985-09-17 | Hoechst Aktiengesellschaft | Plasticizer-containing polyvinyl alcohol granules |
| US4438139A (en) | 1979-08-14 | 1984-03-20 | Key Pharmaceuticals, Inc. | Polymeric diffusion matrix containing estrogens |
| US4466953A (en) * | 1979-08-14 | 1984-08-21 | Key Pharmaceuticals, Inc. | Polymeric diffusion matrix |
| US4470962A (en) * | 1979-08-14 | 1984-09-11 | Key Pharmaceuticals, Inc. | Polymeric diffusion matrix |
| US4492685A (en) * | 1979-08-14 | 1985-01-08 | Key Pharmaceuticals, Inc. | Protective skin matrix |
| US4460562A (en) * | 1982-01-06 | 1984-07-17 | Key Pharmaceuticals, Inc. | Polymeric diffusion matrix containing propranolol |
| AU661872B2 (en) * | 1991-11-07 | 1995-08-10 | Novamont S.P.A. | A method of producing starch based-biodegradable thermoplastic compositions comprising plasticised polyvinylalcohol |
Also Published As
| Publication number | Publication date |
|---|---|
| GB493561A (en) | 1938-10-11 |
| FR825552A (en) | 1938-03-07 |
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