EP1322789B1 - Mattes transferelement zur verleihung eines lederfinishes - Google Patents

Mattes transferelement zur verleihung eines lederfinishes Download PDF

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Publication number
EP1322789B1
EP1322789B1 EP99963660A EP99963660A EP1322789B1 EP 1322789 B1 EP1322789 B1 EP 1322789B1 EP 99963660 A EP99963660 A EP 99963660A EP 99963660 A EP99963660 A EP 99963660A EP 1322789 B1 EP1322789 B1 EP 1322789B1
Authority
EP
European Patent Office
Prior art keywords
layer
transfer member
matt
layers
resins
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
Application number
EP99963660A
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English (en)
French (fr)
Other versions
EP1322789A1 (de
Inventor
Pushpinder Kumar Kaushik
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Max India Ltd
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Max India Ltd
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Filing date
Publication date
Application filed by Max India Ltd filed Critical Max India Ltd
Publication of EP1322789A1 publication Critical patent/EP1322789A1/de
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Publication of EP1322789B1 publication Critical patent/EP1322789B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • C—CHEMISTRY; METALLURGY
    • C14—SKINS; HIDES; PELTS; LEATHER
    • C14C—CHEMICAL TREATMENT OF HIDES, SKINS OR LEATHER, e.g. TANNING, IMPREGNATING, FINISHING; APPARATUS THEREFOR; COMPOSITIONS FOR TANNING
    • C14C11/00—Surface finishing of leather
    • C14C11/003—Surface finishing of leather using macromolecular compounds

Definitions

  • This invention relates to a transfer member for treatment of leather so as to impart matt properties thereto.
  • WPI Derwent abstract of SO-A-1730171 describes chemical treatment of leather to achieve a matt effect.
  • a nitrocellulose varnish comprising modified aerosil as matting agent is applied to the leather surface.
  • FR-A-2116822 describes a transfer member for applying a matting film to a leather surface.
  • the film comprises inter alia a film-forming synthetic resin and a matting agent.
  • split leathers A further disadvantage of the known art is that associated with split leathers.
  • split leather was subjected to the step of lamination, pigmentation or transfer foil so as to upgrade or improve the quality of the leather.
  • split leather is impregnated with binder and waxes so that when compressed a release takes place from the plate. After impregnation, it is then laminated, pigmented or treated with a transfer foil.
  • a disadvantage is that the fiber bundles do not get concealed and continue to be in a standing position.
  • An object of this invention is to propose a novel construction of a transfer member which may advantageously be employed for imparting a matt finish to leather.
  • Another object of this invention is to propose a transfer member for imparting a matt together with either a colour, print or metallised finish to leather.
  • Yet another object of this invention is to propose a transfer member for leather applications having suitable plate releasing properties.
  • Still another object of this invention is to propose a transfer member for leather applications having uniform feel property.
  • a transfer member for imparting matt properties to leather comprising a substrate or carrier to releasably support a matt film of at least three resins selected from ethylene propylene polymer, ethylene propylene butylene polymer, high density polyethylene, isotactic polypropylene and additives.
  • the matt film comprises an inner layer being the active layer having the matt properties, and an outer layer being the colayer.
  • the matt film comprises preferably of three coextruded layers and wherein the inner layer has the matt properties, a middle layer being a colayer which contributes to the bulk properties of the film and further is a storage layer for the migratory chemicals, and an outer layer being a colayer.
  • the inner layer comprises a composition of at least three resins selected from ethylene propylene polymer, ethylene propylene butylene polymer, high density polyethylene and isotactic polypropylene.
  • the middle layer comprises isotactic polypropylene and additives being anti-static and slip agents.
  • the outer layer also comprises isotactic polypropylene with antiblock agents. In the instance where the outer layer is a sealant layer, it may then comprise random copolymer of ethylene propylene where ethylene is present in the amount of 1 to 8 parts, and preferably 3 to 5 parts, of the copolymer.
  • the resin composition for the inner layer comprises 10-30% by wt. of ethylene propylene polymer, 0-50% by wt. of ethylene propylene butylene polymer, 25-65% by wt. of high density polyethylene and 0-50% by wt. of isotactic polypropylene.
  • the composition for the inner layer may additionally include the additives present in the amount of 0-5%.
  • the additives are migratory chemicals such as antistatic and slip agents selected from erucamide stearamide, silicon oil, stearic acid and stearates used singularly or in any combination thereof.
  • the additives for the inner layer may also comprise antiblock agent present in the amount of 500-4000 PPM.
  • the antiblock agent is selected from silica, silicates, clay talc and quartz present singularly or in any combination thereof.
  • the haziness of the matt layer is varid by changing the thickness of the matt layer and/or quantities of additives in the inner layer composition.
  • the middle layer comprises isotactic polypropylene and additives.
  • the additives are antistatic and slip agents and are present in the amount of 500-10000 PPM by wt. of the isotactic polypropylene.
  • the outer layer comprises isotactic polypropylene with antiblock agents as herein above mentioned.
  • the outer layer is a sealant layer, it then comprises random co-polymer of ethylene propylene where ethylene is present in the amount of 1-8 parts and preferably 3-5 parts of the co-polymer.
  • the outer layer may also comprise ethylene propylene butylene polymer singularly or in combination with the aforesaid co-polymer.
  • the isotactic polypropylene present in the layers has an average molecular wt. of 25000 to 1,000,00, a melt flow index of 1-25 at 2°C and density of 0.892 to 0.92.
  • an antiblock agent is provided in the outer layer.
  • the antiblock agent may not be provided in the outer layer.
  • the anti block agent is preferably provided in the outer layer as well as in the inner layer.
  • the outer layer may be subjected to the step of activation by a corona treatment, flame treatment or chemical treatment.
  • the outer layer comprises isotactic polypropylene and that the migratory agents are present in the layer.
  • the matt film does not contain distinct layers, and the matt film is formed from a single mix of said resins and additives, which is then extrusion coated on said substrate or carrier.
  • the matt film of the present invention has a thickness of 8 to 45 micrones. If the thickness of the film is greater than 45 microns, it does not affect the workability or properties of the film, but no advantages are derived therefrom and only adds to the end cost of the film. If the film thickness is less than 8 microns, the required quality and properties are then not achieved. Both the outer and middle layers should have sufficient thickness in the instant of two layers film, in order to store and release the migratory chemicals therefrom. Similarly, the outer, middle and inner layers should have sufficient thickness in an three layers structure for storage and release of said chemicals. Preferably, and without implying any limitation thereto the matt film has a thickness of 12 to 30 microns.
  • the outer and inner layers have each a thickness of 2 to 8 microns and preferably a thickness of 2 to 5 microns. If the thickness of the inner layer is less than 2 microns, then haziness would reduce. If the thickness is more than 8 microns, and the outer, middle and inner layers are extruded then problems may arise in the coextrusion of the layers.
  • the transfer member of the present invention also envisages a foil in addition to the matt film, said foil being selected from a colour, print or metallized foil.
  • the transfer member comprises a carrier or substrate having the matt film, the foil being provided on said film.
  • the structure of the foil depends as to whether colour, print or metallized properties are to be imparted to the leather surface, and that separate foils are provided for each property.
  • the foil comprises at least a plurality of layers with an outermost layer being an adhesive layer adapted to contact the leather surface and inner most layer being a release layer in contact with the film and an active layer provided therebetween, and wherein the active layer is either a print, colour or metallized layer.
  • the colour foil further comprises a feel modifier layer with or without top protecting coat layer on said release coating, said colorant layer provided onto said feel modifier layer.
  • the intermediate layers comprise a top coat layer on said release layer, said metallized layer being provided on said top coat layer to provide metal finish to the leather.
  • the print foil intermediate layers comprise a feel modifier layer provided onto said release layer, a print coat layer provided onto said feel modifier layer.
  • a top coat layer may or may not be provided on said feel modifier layer.
  • the feel modifier layer in itself comprises a plurality of layers. According to one embodiment, the feel modifier layer comprises at least two layers. One of said layer is a mixture of feel modifiers and a top coat or feel modifier and cover coat.
  • the feel modifier layer comprises three layers namely a feel modifier layer adjacent to the release layer, a top coat layer adjacent to the feel modifier layer, and a covering layer adjacent the top coat layer.
  • the feel modifier layer comprises a combination of or only a single wax such as microcrystillene wax, paraffin, natural or synthetic waxes in solution or emulsion form.
  • the waxes incorporated in the feel modifier imparts a waxy feel to leather.
  • the feel modifier layer also comprises oils used singularly or in combination wi th polydialkyl siloxane, olefin modified siloxanes, diethylene modified silicon oils, epoxy modified silicon oils, alcohol modified silicon oils.
  • the feel modifier layer comprises a combination of waxes and lubricants as this also improves the scuff resistance properties. If a waxy feel is required, then the content of waxes present in the feel modifier layer is greater than that of the lubricants. However, if a silky feel is required then the content of lubricants present in the feel modifier layer is greater than the waxes.
  • the feel modifier layer can consist of a combination of waxes and lubricants, or separate layers of waxes and lubricants.
  • the top coat layer is a protective coating for protecting the covering coat layer.
  • the coat layer consists of lacquer and lacquer emulsions of various resins, such as nitrocellulose copolymer of vinyl chloride and vinyl acetate, polyurethane and polyamides with or without cross linking agents with or without fillers, such as silica.
  • the covering coat layer comprises essentially of natural resins such as shellac, casein, albumin and gelatene or plasticizers.
  • the covering coat layer may be selected from natural resins or synthetic resins such as acrylic, methacrylic, synthetic rubber, vinyl resin, nitrocellulose resins or polyurethane.
  • the natural resin may be present with the synthetic resin.
  • the covering coat layer may also include colourants with or without dispersing agents, with or without cross linking or curing agents.
  • the colourants may be selected from metallic pigments, pearl pigments of organic or inorganic nature or dyestuffs.
  • the structure of the foil comprises an outermost layer of adhesive adapted to contact the leather receiving surface, a covering and/or colourant layer in contact with said adhesive layer, a feel modifier layer with or without top protecting coat layer, in contact with said covering and/or colorant layer and a release layer in contact with said feel modifier layer.
  • a colour foil is provided with the matt film.
  • the structure of the foil comprises an outermost adhesive layer adapted to contact the leather surface, a metallized layer in contact with the adhesive layer, a top coat layer in contact with said metallized layer, a release layer in contact with said top coat layer, said matt film in contact with the release layer.
  • the metallized layer is provided onto the top coat layer by passing the transfer foil through a vacuum chamber and vapours of the metal get deposited thereon.
  • the thickness of the metal layer depends on the temperature of the molten metal and vacuum chamber, the processing roll temperature and the optical density of the metal coating. Preferably the thickness of the metal layer is 1.8-2.5 optical density.
  • waxes and/or lubricants may be added to the top coating layer, but only for the purposes of imparting scuff resistance and not feel properties. Alternatively such waxes and/or lubricants may be added to the release coat.
  • a separate scuff resistance, wet rub and dry rub fastness coat layer may be provided between said top coat layer and release coat layer.
  • the present invention envisages yet another embodiment of a transfer foil having a print coat layer between said metallized layer and top coat.
  • the print coat layer comprises any pattern or design of a single or multicolours. Printing pigmented lacquers may be employed.
  • the structure of the foil comprises an outermost adhesive layer adapted to contact the leather surface, a print coat layer in contact with the adhesive layer, a feel modifier layer with or without covering coat layer in contact with the print layer, a release layer in contact with the feel modifier layer, said matt film in contact with the release layer.
  • the print coat layer is combined with the adhesive layer.
  • the print coat comprises pattern or design of a single or multicolours.
  • Printing pigmented lacquers may also be employed.
  • the thickness of the release coating layer is in between 1-3 GMS (Gram per square meter) (solid).
  • the thickness of the feel modifier layer/top protected layer is 1-6 GMS (solid).
  • the thickness of active coat layer is 1-5 GSM GSD (solid) and the thickness of adhesive layer is 2-50 GSM (solid).
  • composition prepared for the outer/matt layer is illustrated.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • General Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Laminated Bodies (AREA)
  • Treatment And Processing Of Natural Fur Or Leather (AREA)
  • Decoration By Transfer Pictures (AREA)
  • Synthetic Leather, Interior Materials Or Flexible Sheet Materials (AREA)

Claims (21)

  1. Ein Transferelement um Leder wenigstens matte Eigenschaften zu verleihen, mit einem Substrat oder einem Träger, um lösbar einen matten Film zu tragen aus wenigstens drei Harzen, die gewählt werden aus Ethylenpropylenpolymer, Ethylenpropylenbutylenpolymer, hochdichtem Polyethylen und isotaktischem Polypropylen und Zusätzen.
  2. Ein Transferelement gemäß Anspruch 1,
    wobei der genannte matte Film wenigstens zwei co-extrudierte Schichten aufweist, eine innere Schicht, die eine matte Schicht ist, die matte Eigenschaften hat, und die genannten Harze und 0 bis 5 % der genannten Additive enthält, und einer äußeren Schicht, die eine Parallelschicht ist und isotaktisches Polypropylen und Zusätze enthält.
  3. Ein Transferelement gemäß Anspruch 1,
    wobei der genannte matte Film drei co-extrudierte Schichten enthält, die eine innere oder matte Schicht der genannten Harze und 0 bis 5 % der genannten Additive sind, einer Zwischenschicht von isotaktischem Polypropylen und migratorischen Additiven und einer äußeren Schicht.
  4. Ein Transferelement gemäß Anspruch 1,
    wobei der genannte matte Film eine Beschichtung der genannten Harze und Additive enthält, die auf dem genannten Substrat oder Träger extrusionsbeschichtet sind.
  5. Ein Transferelement gemäß Anspruch 1,
    wobei die Harzzusammensetzung der inneren oder matten Schicht eine Zusammensetzung von wenigstens drei Harzen aufweist, die gewählt wurden aus 10 bis 30 Gewichts-% von Ethylenpropylenpolymer, 0 bis 5 Gewichts-% von Ethylenpropylenbutylenpolymer, 25 bis 65 Gewichts-% von hochdichtem Polyethylen und 0 bis 50 Gewichts-% von isotaktischem Polypropylen.
  6. Ein Transferelement gemäß Anspruch 1,
    wobei die genannten Additive Antiblockmittel und migratorische Mittel sind wie Antistatik- und Gleitmittel gewählt aus Erucamidstearamid, Sliciumöl, Stearinsäure und Stearaten, die einzeln benutzt werden oder in jeglicher Kombination,
    wobei das Antiblockmittel gewählt wird aus Silika, Silikaten, Ton, Talk und Quarz, die einzeln oder in jeglicher Kombination davon vorliegen und in einer Menge von 500 bis 4.000 ppm vorhanden sind.
  7. Ein Transferelement gemäß Anspruch 1,
    wobei die Dicke des Elementes 8 bis 45 micron ist und vorzugsweise 12 bis 30 micron.
  8. Ein Transferelement gemäß den Ansprüchen 2 und 3,
    wobei die Dicken der äußeren und der inneren Schichten jeweils 2 bis 8 micron und vorzugsweise 2 - 5 micron sind.
  9. Ein Transferelement gemäß Anspruch 1,
    enthaltend eine Folie, die auf dem genannten Film vorgesehen ist, wobei die genannte Folie gewählt wird aus einer Druck-, Farb- oder metallisierten Folie.
  10. Ein Transferelement gemäß Anspruch 9,
    wobei jede der genannten Folien eine Vielzahl von Schichten aufweist mit wenigstens einer äußersten Schicht, die eine Klebschicht ist, die angepasst ist, um die Lederfläche zu kontaktieren, einer innersten Schicht, die eine Löseschicht ist in Kontakt mit dem Film und einer aktiven Schicht, die dazwischen vorgesehen ist, und wobei die aktive Schicht entweder eine Druck-, Farb- oder metallisierte Schicht ist.
  11. Ein Transferelement gemäß Anspruch 10,
    wobei die Druck- und Farbfolie jeweils eine Gefühlveränderungsschicht hat, die eine Vielzahl von Schichten aufweist und wobei eine der Schichten eine Gefühlveränderungsschicht ist und die andere Schicht eine oberste Beschichtungsschicht oder Abdeckbeschichtungsschicht ist.
  12. Ein Transferelement gemäß Anspruch 10,
    wobei die Druck- und Farbfolie jeweils eine Gefühlveränderungsschicht hat, die eine Vielzahl von Schichten aufweist und wobei eine der Schichten eine Gefühlveränderungsschicht ist benachbart zu der Lösebeschichtung, eine oberste Beschichtungsschicht benachbart zu der Gefühlveränderungsschicht, und eine Abdeckschicht benachbart zu der obersten Beschichtungsschicht.
  13. Ein Transferelement gemäß Anspruch 10,
    wobei die metallisierte Folie eine oberste Beschichtungsschicht auf der genannten Lösebeschichtungsschicht enthält.
  14. Ein Transferelement gemäß den Ansprüchen 11 und 12,
    wobei der Gefühlveränderer eine Kombination von oder lediglich ein einzelnes Wachs enthält wie mikrokristallines Wachs, Parafin, natürliche oder synthetische Wachse in Lösung oder emulgierter Form.
  15. Ein Transferelement gemäß den Ansprüchen 11 und 12,
    wobei die Gefühlveränderungsschicht ebenfalls Öle enthält, die einzeln benutzt werden oder in Verbindung mit Polydialkylsiloxan, olefinmodifizierten Siloxanen, diäthylenmodifizierten Siliziumölen, epoxymodifizierten Siliziumölen, alkoholmodifizierten Siliziumölen.
  16. Ein Transferelement gemäß den Ansprüchen 11 und 12,
    wobei die Gefühlveränderungsschicht eine Kombination enthält von Wachsen und Schmiermitteln unterschiedlicher Schichten von Wachsen und Schmiermitteln.
  17. Ein Transferelement gemäß den Ansprüchen 11 bis 13,
    bei dem die oberste Beschichtungsschicht Lack enthält und Lackemulsionen verschiedener Harze, wie Nitrocellulosecopolymer von Vinylchlorid und Vinylacetat, Polyurethan und Polyamide mit oder ohne Crosslinking-Mittel mit oder ohne Füller, wie Silika.
  18. Ein Transferelement gemäß den Ansprüchen 11 und 12,
    wobei die Abdeckbeschichtungsschicht im Wesentlichen besteht aus natürlichen Harzen wie Schellack, Kasein, Albumin und Gelatine oder Weichmachern.
  19. Ein Transferelement gemäß den Ansprüchen 11 und 12,
    wobei die abdeckende Beschichtungsschicht synthetisches Harz umfasst wie Acrylic, Methacrylic, synthetisches Gummi, Vinylharz, Nitrocelluloseharze oder Polyurethan oder eine Kombination der genannten natürlichen und synthetischen Harze.
  20. Ein Transferelement gemäß den Ansprüchen 11 und 12,
    wobei die abdeckende Beschichtungsschicht auch Farbstoffe enthalten kann mit oder ohne Dispergiermittel, mit oder ohne Vernetzungs- oder Aushärtmittel.
  21. Ein Transferelement gemäß Anspruch 13,
    wobei eine Druckbeschichtungsschicht vorgesehen ist zwischen der genannten metallisierten Schicht und der obersten Beschichtungsschicht.
EP99963660A 1999-11-01 1999-11-01 Mattes transferelement zur verleihung eines lederfinishes Expired - Lifetime EP1322789B1 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/IN1999/000059 WO2001032939A1 (en) 1999-11-01 1999-11-01 A matt transfer member for imparting a finish leather

Publications (2)

Publication Number Publication Date
EP1322789A1 EP1322789A1 (de) 2003-07-02
EP1322789B1 true EP1322789B1 (de) 2005-04-27

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
EP99963660A Expired - Lifetime EP1322789B1 (de) 1999-11-01 1999-11-01 Mattes transferelement zur verleihung eines lederfinishes

Country Status (6)

Country Link
EP (1) EP1322789B1 (de)
CN (1) CN1195874C (de)
AT (1) ATE294242T1 (de)
DE (1) DE69925047T2 (de)
HK (1) HK1049027A1 (de)
WO (1) WO2001032939A1 (de)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1321197C (zh) * 2005-06-29 2007-06-13 广州市晶鼎恒艺科技有限公司 真皮转移涂饰制作方法
WO2009139194A1 (ja) * 2008-05-16 2009-11-19 ミドリホクヨー株式会社 トップコート
ES2600030T3 (es) * 2011-06-01 2017-02-06 Comercial De Utiles Y Moldes, S.A. Carril de corredera compacta para moldes de inyección

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS602989B2 (ja) * 1977-08-01 1985-01-25 スコツト ペ−パ− コンパニ− 剥離シ−ト及びその製造方法
DE3401677A1 (de) * 1984-01-19 1985-07-25 Oike Industrial Co., Ltd., Kyoto Abdruckfolie
JPH05124394A (ja) * 1991-11-07 1993-05-21 Toppan Printing Co Ltd 皮革表現転写箔

Also Published As

Publication number Publication date
WO2001032939A1 (en) 2001-05-10
CN1375015A (zh) 2002-10-16
DE69925047T2 (de) 2006-03-02
DE69925047D1 (de) 2005-06-02
EP1322789A1 (de) 2003-07-02
CN1195874C (zh) 2005-04-06
ATE294242T1 (de) 2005-05-15
HK1049027A1 (en) 2003-04-25

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