EP1258006A2 - Film polymere a couches multiples et utilisation relative - Google Patents

Film polymere a couches multiples et utilisation relative

Info

Publication number
EP1258006A2
EP1258006A2 EP01914465A EP01914465A EP1258006A2 EP 1258006 A2 EP1258006 A2 EP 1258006A2 EP 01914465 A EP01914465 A EP 01914465A EP 01914465 A EP01914465 A EP 01914465A EP 1258006 A2 EP1258006 A2 EP 1258006A2
Authority
EP
European Patent Office
Prior art keywords
layer
layers
film
multilayer film
use according
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Withdrawn
Application number
EP01914465A
Other languages
German (de)
English (en)
Inventor
Stephen William Sankey
Julia Elizabeth Friend
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.)
DuPont Teijin Films US LP
Original Assignee
DuPont Teijin Films US LP
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by DuPont Teijin Films US LP filed Critical DuPont Teijin Films US LP
Publication of EP1258006A2 publication Critical patent/EP1258006A2/fr
Withdrawn legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B27/00—Layered products comprising a layer of synthetic resin
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B7/00—Layered products characterised by the relation between layers; Layered products characterised by the relative orientation of features between layers, or by the relative values of a measurable parameter between layers, i.e. products comprising layers having different physical, chemical or physicochemical properties; Layered products characterised by the interconnection of layers
    • B32B7/02—Physical, chemical or physicochemical properties
    • B32B7/023—Optical properties

Definitions

  • Figure 2 is a micrograph of a cross-section of a cast multilayer film.
  • the difference in the optical properties of each type of layer relates to the different fluorescence of each type of layer, i.e. the layers of one type are relatively more fluorescent than the layers of another type.
  • the layers of the multilayer film may be formed from any film-forming material, such as a synthetic linear polyester which may be obtained by condensing one or more dicarboxylic acids or their lower alky] (up to 6 carbon atoms) diesters, eg terephthalic acid, isophthalic acid, phthalic acid, 2,5-, 2,6- or 2,7-naphthalenedicarboxylic acid, succinic acid, sebacic acid, adipic acid, azelaic acid, 4,4'-diphenyldicarboxylic acid, hexahydro-terephthalic acid or 1 ,2-bis-p-carboxyphenoxyethane (optionally with a monocarboxylic acid, such as pivalic acid) with one or more glycols, particularly an aliphatic or cycloaliphatic glycol, eg ethylene glycol, 1,3-propanediol, 1 ,4-butanediol, neopentyl
  • the thickness of a dark layer is preferably in the range from 0.1 to 50 ⁇ m, more preferably 0.2 to 20 ⁇ m, particularly 0.5 to 15 ⁇ m, and especially 1 to 12 ⁇ m.
  • the titanium dioxide filler particles may be of anatase or rutile crystal form.
  • the titanium dioxide particles preferably comprise a major portion of anatase, more preferably at least 60% by weight, particularly at least 80%, and especially approximately 100% by weight of anatase.
  • the particles can be prepared by standard procedures, such as using the chloride process, or preferably by the sulphate process.
  • the coating is suitably applied to the titanium dioxide particles in aqueous suspension.
  • the inorganic oxides are precipitated in aqueous suspension from water- soluble compounds such as sodium aluminate, aluminium sulphate, aluminium hydroxide, aluminium nitrate, silicic acid or sodium silicate.
  • the layers of each type comprise different levels of one or more UV absorber(s).
  • the UV absorber(s) may be any known to those skilled in the art which are compatible with the other materials used in the preparation of the multilayer films of the present invention.
  • the UV absorber may absorb substantially all wavelengths in the ultraviolet region of the electromagnetic spectrum, or substantially all wavelengths within a selected band of wavelengths within the ultraviolet region.
  • a UV absorber may be chemically inco ⁇ orated in the chain of a layer-forming polyester.
  • Preferred UV-stable polyesters are produced by inco ⁇ orating benzophenones into the polyester, for example as described in EP-A-0006686, EP-A-0031202, EP-A-0031203 and EP-A-0076582, the teaching of which is inco ⁇ orated herein by reference.

Landscapes

  • Laminated Bodies (AREA)
  • Polarising Elements (AREA)
  • Credit Cards Or The Like (AREA)

Abstract

L'invention concerne l'utilisation d'un film à couches multiples en vue de stocker ou de récupérer des informations, ces dernières étant corrélées à la structure multi-couches du film. Le film à couches multiples comprenant au moins deux types différents de couches, chaque type de couches présentant une propriété optique différente, le film à couches multiples comprenant une pluralité de couches d'au moins ces deux types différents de couche. L'invention concerne également un procédé permettant de stocker des informations, un procédé permettant de récupérer des informations stockées et un procédé de protection contre la contrefaçon ou la fraude, ce procédé mettant en oeuvre le film à couches multiples.
EP01914465A 2000-02-22 2001-02-22 Film polymere a couches multiples et utilisation relative Withdrawn EP1258006A2 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
GBGB0004170.7A GB0004170D0 (en) 2000-02-22 2000-02-22 Polymeric film
GB0004170 2000-02-22
PCT/US2001/005903 WO2001062496A2 (fr) 2000-02-22 2001-02-22 Film polymere a couches multiples et utilisation relative

Publications (1)

Publication Number Publication Date
EP1258006A2 true EP1258006A2 (fr) 2002-11-20

Family

ID=9886178

Family Applications (1)

Application Number Title Priority Date Filing Date
EP01914465A Withdrawn EP1258006A2 (fr) 2000-02-22 2001-02-22 Film polymere a couches multiples et utilisation relative

Country Status (6)

Country Link
EP (1) EP1258006A2 (fr)
JP (1) JP2004503393A (fr)
KR (1) KR100706143B1 (fr)
CN (1) CN1500271A (fr)
GB (1) GB0004170D0 (fr)
WO (1) WO2001062496A2 (fr)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP5319877B2 (ja) * 2006-09-05 2013-10-16 三菱樹脂株式会社 積層ポリエステルフィルム
CN101975973B (zh) * 2010-09-16 2013-12-11 宁波激智科技股份有限公司 光学反射薄膜及其制备方法及使用该薄膜的液晶显示装置
KR101663378B1 (ko) * 2014-11-04 2016-10-07 삼화제지 주식회사 다층 형광 피스 제조방법 및 이를 적용한 보안 용지

Family Cites Families (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3959799A (en) * 1974-09-09 1976-05-25 International Business Machines Corporation Information storage by laser beam initiated reactions
JPH0615226B2 (ja) * 1987-09-25 1994-03-02 富士写真フイルム株式会社 感光物質用包装材料
US5303225A (en) * 1989-10-30 1994-04-12 Matsushita Electrical Industrial Co., Ltd. Multi-layered optical disk with track and layer identification
JPH04110148A (ja) * 1990-08-30 1992-04-10 Diafoil Co Ltd 艶消しポリエステルフィルム
JPH05289612A (ja) * 1992-04-06 1993-11-05 Nhk Spring Co Ltd 情報記録システム及び情報通信システム
JP3370105B2 (ja) * 1992-06-22 2003-01-27 三菱化学ポリエステルフィルム株式会社 積層フィルムの製造方法
JP2766821B2 (ja) * 1993-09-30 1998-06-18 セイコープレシジョン株式会社 インクリボンカセット
JPH08290539A (ja) * 1995-04-25 1996-11-05 Diafoil Co Ltd 磁気カード用積層ポリエステルフィルム
JP4191808B2 (ja) * 1996-12-19 2008-12-03 パナソニック株式会社 光ディスクの追記情報の記録方法
NL1007123C2 (nl) * 1997-09-26 1999-03-29 Od & Me Bv Registratiedragers, werkwijze voor het controleren van dergelijke registratiedragers, werkwijzen voor het vervaardigen van dergelijke registratiedragers alsmede inrichting geschikt voor het uitvoeren van dergelijke werkwijzen.
DE69924354T2 (de) * 1998-01-13 2006-03-09 Minnesota Mining & Manufacturing Company, St. Paul Modifizierte copolyester und verbesserte reflektierende mehrschichtfolie

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO0162496A2 *

Also Published As

Publication number Publication date
WO2001062496A3 (fr) 2002-04-18
JP2004503393A (ja) 2004-02-05
CN1500271A (zh) 2004-05-26
GB0004170D0 (en) 2000-04-12
WO2001062496A2 (fr) 2001-08-30
KR100706143B1 (ko) 2007-04-11
KR20020072591A (ko) 2002-09-16

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