发明名称 |
Mehrschichtige, metallisierte oder keramisch beschichtete, siegelfähige, biaxial orientierte Polyesterfolie, Verfahren zu ihrer Herstellung und ihre Verwendung |
摘要 |
<p>Transparent, biaxially-oriented, sealable polyester film has a sealable outer layer (A) and a metallized or ceramic-coated outer layer (C) with different roughness values and coefficients of friction, containing synthetic silicon dioxide with particle diameters of 2.5-10 and 1.5-6 microns and SPAN 98 values of 1.80 or less and 2.0 or less in (A) and (C) respectively. Coextruded, transparent, biaxially-oriented, sealable polyester film with a base layer (B) between a sealable outer layer (A) and a metallized or ceramic-coated outer layer (C), in which layer (A) shows a sealing temperature of not more than 110 degrees C and a seal seam strength of at least 1.3 N/15 mm film width. Layer (A) shows a surface roughness (Ra) of more than 60 nm and a coefficient of friction (CF) (A side/A side) of less than 0.8, and contains 500-5000 ppm synthetic silicon dioxide with an average particle diameter (d50) of 2.5-10 microns and a SPAN 98 value (scattering) of 1.80 or less. Layer (C) shows an Ra value of 30-150 nm and a CF (C side/C side) of less than 0.6, contains 1000-5000 ppm synthetic SiO2 with a d50 of 1.5-6 microns and a SPAN 98 value of 2.0 or less, and is coated with metal or ceramic material. An Independent claim is also included for a method for the production of this film by feeding the base polymers for the 3 layers into separate extruders, filtering the melts, extruding through a multilayer die to form a multilayer flat melt film, taking off the film with a cooling roll and optionally other rollers, stretching by a ratio of (2.5:1)-(6:1) in the machine direction at 80-130 degrees C and then by (3:1)-(5:1) in the cross direction at 90-150 degrees C, and then heat-fixing.</p> |
申请公布号 |
DE50304339(D1) |
申请公布日期 |
2006.09.07 |
申请号 |
DE2003504339 |
申请日期 |
2003.07.02 |
申请人 |
MITSUBISHI POLYESTER FILM GMBH |
发明人 |
JANSSENS, BART, DR.;PEIFFER, DR.PROFESSOR;BARTSCH, STEFAN, DR. |
分类号 |
B32B27/36;B29C55/02;B29C55/12;B29C55/14;B29K67/00;B29L9/00;B32B15/08;B32B18/00;C08J5/18;C08K3/36 |
主分类号 |
B32B27/36 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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