EP0939847A1 - Method for manufacturing a metallized paper material - Google Patents
Method for manufacturing a metallized paper materialInfo
- Publication number
- EP0939847A1 EP0939847A1 EP97912566A EP97912566A EP0939847A1 EP 0939847 A1 EP0939847 A1 EP 0939847A1 EP 97912566 A EP97912566 A EP 97912566A EP 97912566 A EP97912566 A EP 97912566A EP 0939847 A1 EP0939847 A1 EP 0939847A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- paper material
- piece
- waxes
- coating
- wax
- 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.)
- Withdrawn
Links
Classifications
-
- 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
- D21H23/66—Treating discontinuous paper, e.g. sheets, blanks, rolls
-
- 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
- D21H23/52—Addition to the formed paper by contacting paper with a device carrying the material
- D21H23/64—Addition to the formed paper by contacting paper with a device carrying the material the material being non-fluent at the moment of transfer, e.g. in form of preformed, at least partially hardened coating
-
- 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
- D21H19/00—Coated paper; Coating material
- D21H19/02—Metal coatings
-
- 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
- D21H19/00—Coated paper; Coating material
- D21H19/10—Coatings without pigments
- D21H19/14—Coatings without pigments applied in a form other than the aqueous solution defined in group D21H19/12
- D21H19/18—Coatings without pigments applied in a form other than the aqueous solution defined in group D21H19/12 comprising waxes
-
- 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
- D21H19/00—Coated paper; Coating material
- D21H19/80—Paper comprising more than one coating
- D21H19/82—Paper comprising more than one coating superposed
Definitions
- the invention is related to the field of manufacturing metallized papers, in particular for packaging purposes.
- a typical application is in the packaging of cigarettes as an inner liner or internal wrapping, to ensure against loss of flavour and against the drying of the cigarettes. Both are critical parameters for the manufacturer and the end user, and provide confidence in the quality of the end product.
- metallized paper material examples include decorative papers or gift wrap.
- the metallized paper material in question can consist of a paper to which by vapour deposition is applied an aluminium layer, for instance with a substance of 20 grammes per square metre.
- the metallic coating is applied by vaporisation and is subsequently coated with a lacquer or varnish.
- the purpose of this coating is to protect the metal from being abraded. For instance, by a process such as imprinting or embossing and folding the metallic coating, if exposed, would flake or peel off leading to metal particles being deposited on the machines used in the manufacturing process. As a result, the machines could become damaged and the production efficiency could be affected.
- lacquer or varnish has the further positive effect of reducing the friction between the surfaces of paper and machinery, and between superposed sheets of papers. This effect is to be attributed to the chemicals such as waxes and starches in the lacquer or varnish.
- the object of the invention is to provide such method which does not have these disadvantages. This object is achieved through a method for manufacturing a metallized paper material, comprising the steps of:
- the wax or lubricant may be brought into the piece of paper material during the process of manufacturing said material.
- a preferred embodiment of the method according to the invention, wherein the piece of paper material is a paper web comprises the step of reeling the web onto a reel after coating said web with a metal layer, such that the one side of each winding of the web is in contact with the other side of a next winding.
- This method ensures that in a simple and reliable way, a continuous, coherent slip layer may be formed on the aluminium coating.
- the wax or lubricant migrates from the piece of paper material towards and onto the adjoining metal coating of the next winding. Thus, in no part of the metal coating friction forces will develop which would be so high that thereby flaking of the metal coating is generated.
- the relative humidity is less than 552-
- the method according to the invention can be carried out with several waxes, including low molecular weight paraffins, polyethylene waxes, polypropylene waxes modified with maleic anhydride, ester and acid waxes, amide waxes, natural waxes, fatty acids, their esters and alcohols, and sulphonate waxes.
- the fatty acid esters may include short or long chain monovalent alcohols, glycol fatty acid esters, glycerine fatty acid esters and crystalline micro waxes of polyethylene.
- the step of coating the metal layer may include vacuum precipitation, cathodic spraying, vapour phase plating, current free plating, electro plating, vaporisation or absorption.
- the metal coating comprises gold, silver, copper, aluminium or mixtures thereof.
- the aluminium foil laminate as known from US-A-335 3 ⁇ 8, which comprises a paper substrate coated with wax blends.
- the aluminium layer is protected here by a shellac or a nitrocellulose wash coat. This coat should protect the aluminium against possible transfer of the wax blends from the paper onto the aluminium layer, once the sheet in question is stored in rolls.
- this transfer process however is usefully applied for the formation of a slip layer onto the metallic surface.
Landscapes
- Laminated Bodies (AREA)
Abstract
A method for manufacturing a metallized paper material, comprising the steps of: providing a paper material having a wax or lubricant; coating one side of the piece of paper material with a metal; contacting one side of said piece of paper material with the other side of another piece of paper material of the same type, or with the other side of another part of the same piece of paper material; keeping said faces in contact with each other so as to form a slip layer by migration of the wax or lubricant onto the metal coating; separating the pieces or parts of paper material from each other.
Description
Method for manufacturing a metallized paper material
The invention is related to the field of manufacturing metallized papers, in particular for packaging purposes. A typical application is in the packaging of cigarettes as an inner liner or internal wrapping, to ensure against loss of flavour and against the drying of the cigarettes. Both are critical parameters for the manufacturer and the end user, and provide confidence in the quality of the end product.
Other applications of the metallized paper material include decorative papers or gift wrap.
The metallized paper material in question can consist of a paper to which by vapour deposition is applied an aluminium layer, for instance with a substance of 20 grammes per square metre. However, this material appears to have several disadvantages. The metallic coating is applied by vaporisation and is subsequently coated with a lacquer or varnish. The purpose of this coating is to protect the metal from being abraded. For instance, by a process such as imprinting or embossing and folding the metallic coating, if exposed, would flake or peel off leading to metal particles being deposited on the machines used in the manufacturing process. As a result, the machines could become damaged and the production efficiency could be affected.
The coating of lacquer or varnish has the further positive effect of reducing the friction between the surfaces of paper and machinery, and between superposed sheets of papers. This effect is to be attributed to the chemicals such as waxes and starches in the lacquer or varnish.
The application of such lacquer or varnish coating however represents an additional manufacturing step, implying additional costs in raw materials and processing time. A method of this kind is known from DE-C-4412019.
The object of the invention is to provide such method which does not have these disadvantages. This object is achieved through a method for manufacturing a metallized paper material, comprising the steps of:
-providing a piece of paper material having a wax or lubricant,
-coating one side of a piece of paper material with a metal,
-contacting one of the sides of said piece of paper material with the other side of another piece of paper material of the same type, or with the other side of another part of the same piece of paper material, -keeping said faces in contact with each other so as to form a slip layer by migration of the wax or lubricant coating onto the metal coating,
-separating the pieces or parts of paper material from each other. The wax or lubricant may be brought into the piece of paper material during the process of manufacturing said material.
A preferred embodiment of the method according to the invention, wherein the piece of paper material is a paper web, comprises the step of reeling the web onto a reel after coating said web with a metal layer, such that the one side of each winding of the web is in contact with the other side of a next winding.
This method ensures that in a simple and reliable way, a continuous, coherent slip layer may be formed on the aluminium coating. The wax or lubricant migrates from the piece of paper material towards and onto the adjoining metal coating of the next winding. Thus, in no part of the metal coating friction forces will develop which would be so high that thereby flaking of the metal coating is generated.
Good results are obtained in case the contacting sides of the paper material are kept in contact for at least 2 hours. Preferably, the relative humidity is less than 552-
The method according to the invention can be carried out with several waxes, including low molecular weight paraffins, polyethylene waxes, polypropylene waxes modified with maleic anhydride, ester and acid waxes, amide waxes, natural waxes, fatty acids, their esters and alcohols, and sulphonate waxes. The fatty acid esters may include short or long chain monovalent alcohols, glycol fatty acid esters, glycerine fatty acid esters and crystalline micro waxes of polyethylene. The step of coating the metal layer may include vacuum precipitation, cathodic spraying, vapour phase plating, current free plating, electro plating, vaporisation or absorption. The metal coating comprises gold, silver, copper, aluminium or mixtures thereof.
Reference is made to the aluminium foil laminate as known from US-A-335 3^8, which comprises a paper substrate coated with wax blends. The aluminium layer is protected here by a shellac or a nitrocellulose wash coat. This coat should protect the aluminium against possible transfer of the wax blends from the paper onto the aluminium layer, once the sheet in question is stored in rolls.
According to the invention, this transfer process however is usefully applied for the formation of a slip layer onto the metallic surface.
Claims
1. Method for manufacturing a metallized paper material, comprising the steps of: -providing a piece of paper material having a wax or lubricant, -coating one side of the piece of paper material with a metal, -contacting one side of said piece of paper material with the other side of another piece of paper material of the same type, or with the other side of another part of the same piece of paper material,
-keeping said faces in contact with each other so as to form a slip layer by migration of the wax or lubricant onto the metal coating,
-separating the pieces or parts of paper material from each other.
2. Method according to claim 1, wherein the piece of paper material is a paper web, and comprising the step of reeling the web onto a reel after coating said web with a metal layer, such that the one side of each winding of the web is in contact with the other side of a next winding.
3. Method according to claim 1 , wherein the piece of paper material is a board.
4. Method according to one of the preceding claims, wherein the contacting sides of the paper material are kept in contact for at least 24 hours.
5« Method according to any of the preceding claims, wherein the relative humidity is less than 55#-
6. Method according to any of the preceding claims, wherein the wax includes low molecular weight paraffins, polyethylene waxes, polypropylene waxes modified with maleic anhydride, ester and acid waxes, amide waxes, natural waxes, fatty acids, there esters and alcohols, and sulphonate waxes.
7. Method according to claim 6, wherein the fatty acid esters include short or long chain monovalent alcohols, glycol fatty acid esters, glycerine fatty acid esters and crystalline micro waxes of polyethylene.
8. Method according to any of the preceding claims, wherein the metal coating step includes vacuum precipitation, cathodic spraying, vapour phase plating, current free plating, electro plating, vaporisation or absorption.
9. Method according to any of the preceding claims, wherein the metal coating comprises gold, silver, copper, aluminium or mixtures thereof.
10. Method according to any of the preceding claims, wherein before applying the metal coating, a pre-metallization coating or primer is applied to the paper material.
Applications Claiming Priority (5)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
NL1004595A NL1004595C2 (en) | 1996-11-22 | 1996-11-22 | Metallised paper manufacture |
NL1004595 | 1996-11-22 | ||
NL1005218 | 1997-02-07 | ||
NL1005218A NL1005218C1 (en) | 1996-11-22 | 1997-02-07 | Method of manufacturing a metallized paper material. |
PCT/NL1997/000613 WO1998022655A1 (en) | 1996-11-22 | 1997-11-10 | Method for manufacturing a metallized paper material |
Publications (1)
Publication Number | Publication Date |
---|---|
EP0939847A1 true EP0939847A1 (en) | 1999-09-08 |
Family
ID=26642485
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP97912566A Withdrawn EP0939847A1 (en) | 1996-11-22 | 1997-11-10 | Method for manufacturing a metallized paper material |
Country Status (4)
Country | Link |
---|---|
EP (1) | EP0939847A1 (en) |
AU (1) | AU4969797A (en) |
NL (1) | NL1005218C1 (en) |
WO (1) | WO1998022655A1 (en) |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN110485207A (en) * | 2019-07-12 | 2019-11-22 | 嘉兴市豪能科技股份有限公司 | A kind of production method of depth decorative pattern label directly plating papers |
KR20240022563A (en) * | 2021-06-14 | 2024-02-20 | 멜로디아 리미티드 | Processes for metallization and products formed therefrom |
Family Cites Families (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5270088A (en) * | 1992-03-18 | 1993-12-14 | Minnesota Mining And Manufacturing Company | Graphic package incorporating a dual function separating layer |
DE4412019C2 (en) * | 1994-04-07 | 1996-08-01 | Alcan Gmbh | Metallized paper cigarette wrapper and process for its manufacture |
US5676787A (en) * | 1995-06-07 | 1997-10-14 | Borden Decorative Products, Inc. | Method for making repositionable wall covering and intermediate for same |
-
1997
- 1997-02-07 NL NL1005218A patent/NL1005218C1/en not_active IP Right Cessation
- 1997-11-10 WO PCT/NL1997/000613 patent/WO1998022655A1/en not_active Application Discontinuation
- 1997-11-10 EP EP97912566A patent/EP0939847A1/en not_active Withdrawn
- 1997-11-10 AU AU49697/97A patent/AU4969797A/en not_active Abandoned
Non-Patent Citations (1)
Title |
---|
See references of WO9822655A1 * |
Also Published As
Publication number | Publication date |
---|---|
AU4969797A (en) | 1998-06-10 |
WO1998022655A1 (en) | 1998-05-28 |
NL1005218C1 (en) | 1998-05-27 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
PUAI | Public reference made under article 153(3) epc to a published international application that has entered the european phase |
Free format text: ORIGINAL CODE: 0009012 |
|
17P | Request for examination filed |
Effective date: 19990510 |
|
AK | Designated contracting states |
Kind code of ref document: A1 Designated state(s): AT BE CH DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE |
|
17Q | First examination report despatched |
Effective date: 19991014 |
|
STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: THE APPLICATION IS DEEMED TO BE WITHDRAWN |
|
18D | Application deemed to be withdrawn |
Effective date: 20000225 |