WO1997026408A1 - Method for marking paper and apparatus for detected marked paper - Google Patents
Method for marking paper and apparatus for detected marked paper Download PDFInfo
- Publication number
- WO1997026408A1 WO1997026408A1 PCT/FI1997/000025 FI9700025W WO9726408A1 WO 1997026408 A1 WO1997026408 A1 WO 1997026408A1 FI 9700025 W FI9700025 W FI 9700025W WO 9726408 A1 WO9726408 A1 WO 9726408A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- paper
- tracer
- procedure
- marked
- reclaimed
- Prior art date
Links
Classifications
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21B—FIBROUS RAW MATERIALS OR THEIR MECHANICAL TREATMENT
- D21B1/00—Fibrous raw materials or their mechanical treatment
- D21B1/02—Pretreatment of the raw materials by chemical or physical means
- D21B1/026—Separating fibrous materials from waste
- D21B1/028—Separating fibrous materials from waste by dry methods
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21C—PRODUCTION OF CELLULOSE BY REMOVING NON-CELLULOSE SUBSTANCES FROM CELLULOSE-CONTAINING MATERIALS; REGENERATION OF PULPING LIQUORS; APPARATUS THEREFOR
- D21C5/00—Other processes for obtaining cellulose, e.g. cooking cotton linters ; Processes characterised by the choice of cellulose-containing starting materials
- D21C5/02—Working-up waste paper
-
- 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
- D21H21/14—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 function or properties in or on the paper
-
- 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
- D21H17/00—Non-fibrous material added to the pulp, characterised by its constitution; Paper-impregnating material characterised by its constitution
- D21H17/63—Inorganic compounds
- D21H17/67—Water-insoluble compounds, e.g. fillers, pigments
-
- 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
- D21H23/00—Processes or apparatus for adding material to the pulp or to the paper
- D21H23/02—Processes or apparatus for adding material to the pulp or to the paper characterised by the manner in which substances are added
- D21H23/22—Addition to the formed paper
- D21H23/50—Spraying or projecting
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W30/00—Technologies for solid waste management
- Y02W30/50—Reuse, recycling or recovery technologies
- Y02W30/64—Paper recycling
Definitions
- the present invention relates to a procedure for the marking of paper and detection of marked paper for sorting when the paper is recycled.
- the invention relates to an appara ⁇ tus for the detection of marked paper, as defined in the preamble of claim 10.
- 'paper' means paper and cardboard sorts mainly manufactured from lignocellulo- se-based raw material by means of a paper or cardboard making machine.
- the paper fibres become brittle and shorter. Therefore, it is of prima ⁇ ry importance for the paper manufacturer to know how many times the paper raw material has been used befo ⁇ re. If the paper raw material has been used several times before, the fibres are often so short and of such low quality that the raw material is not accep ⁇ table for reuse and has to be burned or destroyed in some other way.
- the object of the present invention is to eliminate the drawbacks mentioned above.
- a specific object of the invention is to produce a new procedure for the marking of paper and detection of marked paper to allow it to be sorted in connection with recycling in such a way that the marking and detection of paper can be carried out mechanically by an online method without manually touching the paper.
- the invention is based on the basic idea, de ⁇ veloped during the investigations carried out, that a chemical tracer corresponding to the number of times the paper pulp has been used in the papermaking pro ⁇ cess is introduced into the paper to be marked.
- the tracer is detected in reclaimed paper by means of a detector sensitive to the tracer to allow reclaimed paper to be sorted for recycling according to the num ⁇ ber of times it has been used.
- the inven ⁇ tion makes it possible to determine the number of recycling times for each lot or even each sheet of reclaimed paper, arranged e.g. for transport on a con- veyor, on the basis of the tracer, which specifically corresponds to the number of times the paper has been recycled.
- the user of reclaimed paper is able to sort the reclaimed paper e.g. by means of a sorter ar ⁇ ranged in conjunction with and controlled by a detec- tor, according to the number of recycling times of the reclaimed paper.
- Usable and recyclable reclaimed paper can be passed on to a papermaking process, whereas reclaimed paper that has already been recycled many times and is of a lower quality can be passed to an energy production unit or to a dumping place or some other kind of disposal system.
- the invention thus ma ⁇ kes it possible to sort reclaimed paper in a desired manner and in accordance with desired criteria for reclaimed paper.
- the tracer used in the procedure of the in ⁇ vention preferably contains metal and/or metal com ⁇ pounds, e.g.
- the tracer may also be e.g. an organometallic com ⁇ pound.
- the tracer may consist of any tracer that can be introduced into paper during manufacture corresponding to the number of times the fibre raw material has been used and which is not dis ⁇ solved or otherwise removed from the paper during the paper manufacturing process.
- the tracer may consist of a single compound or it may contain two or more com ⁇ pounds, whose proportions in the tracer are constant.
- the chemical tracer may be added into paper or into a raw material of paper, e.g. lignocellulose pulp, paper filler, pigment or generally in any suitable way.
- the tracer can be detected by an easy and fast method, i.e. by an on-line method, e.g. using an emission spectrometer.
- a specially preferred method of detecti ⁇ on is to vaporize the tracer by means of a laser beam and to detect it by means of an emission spectrometer. If desired, other methods and/or devices for marking and/or detecting can also be used.
- EXAMPLE 1 For reasons of product liability, a paper ma ⁇ nufacturer wants to be able to identify their own pa ⁇ per in any circumstances. During the manufacturing process in the paper mill, lanthane in an amount of 100 ⁇ g/g of filler and samarium in an amount of 150 ⁇ g/g in nitrate form are mixed with the filler. The filler is added into the paper during the manufactu ⁇ ring process. The paper product is sent to a customer. Later, a reclamation claiming the paper sold by the manufacturer to have been defective is raised against the paper manufacturer. The manufacturer requests a sample of the defective product. The sample is ana ⁇ lysed in a laboratory.
- the lanthanide concentrations in the sample are determined. It is established that the La/Sm ratio is 3.5. Since the La/Sm ratio in marked paper is 0.67, the manufacturer is able to prove that the defective paper is not their produce.
- a paper mill which uses recycled fibre adver ⁇ tises in their marketing that their paper, certified to have a certain fibre composition, can be automati ⁇ cally identified during sorting and thus separated for a given use.
- paper containing e.g. 10 % recycled fibre is so marked that it will contain 100 ⁇ g of lanthane and 200 ⁇ g of samarium in nitrate form per dm .
- Paper containing 20 % recycled fibre again con ⁇ tains 100 ⁇ g of lanthane and 150 ⁇ g of samarium per dm 2 .
- the paper sorter is provided with a laser- excited emission spectrograph, it can easily determine the lanthanide concentrations and their ratios in the paper. In this way, these paper sorts can be automati ⁇ cally separated from other, non-marked sorts and from each other.
Abstract
Description
Claims
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
AU14463/97A AU1446397A (en) | 1996-01-17 | 1997-01-17 | Method for marking paper and apparatus for detected marked paper |
EP19970901099 EP0876535A1 (en) | 1996-01-17 | 1997-01-17 | Method for marking paper and apparatus for detected marked paper |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FI960239A FI98744C (en) | 1996-01-17 | 1996-01-17 | Method of marking paper and device for detecting marked paper |
FI960239 | 1996-01-17 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO1997026408A1 true WO1997026408A1 (en) | 1997-07-24 |
Family
ID=8544930
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/FI1997/000025 WO1997026408A1 (en) | 1996-01-17 | 1997-01-17 | Method for marking paper and apparatus for detected marked paper |
Country Status (4)
Country | Link |
---|---|
EP (1) | EP0876535A1 (en) |
AU (1) | AU1446397A (en) |
FI (1) | FI98744C (en) |
WO (1) | WO1997026408A1 (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN106164937A (en) * | 2014-03-25 | 2016-11-23 | 精工爱普生株式会社 | Sheet production apparatus |
CN113201956A (en) * | 2020-01-30 | 2021-08-03 | 精工爱普生株式会社 | Fiber treatment system and fiber treatment method |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2089383A (en) * | 1980-05-30 | 1982-06-23 | Gao Ges Automation Org | Paper security with authenticity mark of luminescent material and utilization method thereof |
DE3122470C2 (en) * | 1981-06-05 | 1985-09-05 | GAO Gesellschaft für Automation und Organisation mbH, 8000 München | Security paper and process for making the same |
US5118349A (en) * | 1986-08-19 | 1992-06-02 | Petrel | Security markings, material provided with security marks, and apparatus to detect the security mark |
-
1996
- 1996-01-17 FI FI960239A patent/FI98744C/en active
-
1997
- 1997-01-17 EP EP19970901099 patent/EP0876535A1/en not_active Withdrawn
- 1997-01-17 AU AU14463/97A patent/AU1446397A/en not_active Abandoned
- 1997-01-17 WO PCT/FI1997/000025 patent/WO1997026408A1/en not_active Application Discontinuation
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2089383A (en) * | 1980-05-30 | 1982-06-23 | Gao Ges Automation Org | Paper security with authenticity mark of luminescent material and utilization method thereof |
DE3122470C2 (en) * | 1981-06-05 | 1985-09-05 | GAO Gesellschaft für Automation und Organisation mbH, 8000 München | Security paper and process for making the same |
US5118349A (en) * | 1986-08-19 | 1992-06-02 | Petrel | Security markings, material provided with security marks, and apparatus to detect the security mark |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN106164937A (en) * | 2014-03-25 | 2016-11-23 | 精工爱普生株式会社 | Sheet production apparatus |
US10920347B2 (en) | 2014-03-25 | 2021-02-16 | Seiko Epson Corporation | Sheet manufactured from recyclable materials |
CN112381200A (en) * | 2014-03-25 | 2021-02-19 | 精工爱普生株式会社 | Sheet manufacturing apparatus |
CN113201956A (en) * | 2020-01-30 | 2021-08-03 | 精工爱普生株式会社 | Fiber treatment system and fiber treatment method |
Also Published As
Publication number | Publication date |
---|---|
AU1446397A (en) | 1997-08-11 |
FI98744C (en) | 1997-08-11 |
EP0876535A1 (en) | 1998-11-11 |
FI960239A0 (en) | 1996-01-17 |
FI98744B (en) | 1997-04-30 |
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