公开(公告)号：EP0940427A1

公开(公告)日：1999-09-08

申请号：EP98103969.6

申请日：1998-03-06

Applicant: Imation Corp.

Inventor： Patel, Ranjan C. ,  Vogel, Jon C. ,  Parsons, Keith B. ,  Spence, Graham ,  Lindsay, Alan J. ,  Hobson, Rachel J. ,  Williams, Luke C.

IPC: C08J9/26 ,  B41M5/00

CPC classification number: B41M5/508 ,  B41M5/0047 ,  B41M5/0064 ,  B41M5/52 ,  B41M5/5218 ,  B41M5/5236 ,  B41M5/5254 ,  C08J9/26 ,  C08J2201/0462 ,  Y10T428/24802 ,  Y10T428/249962 ,  Y10T428/2933

Abstract: A method for manufacturing a microporous film comprising the steps of:

(a) providing a first polymer which is a hydrophobic thermoplastic polymer and a second polymer which is a hydrophilic polymer or copolymer of N-vinylpyrrolidone;
(b) dissolving said first and second polymers in a solvent system which is compatible with both polymers, said solvent system comprising a blend of an aprotic organic solvent and an alcohol;
(c) coating the resulting solution on a support;
(d) effecting at least a partial drying of the resulting coating; and
(e) washing the coating in an aqueous medium so as to extract at least 50% by weight of the said second polymer.

Image accepting members comprising a microporous film made by the above method, and preferably comprising a support which is also microporous.

Abstract translation: 一种制造微孔薄膜的方法，包括以下步骤：（a）提供作为疏水性热塑性聚合物的第一聚合物和作为N-乙烯基吡咯烷酮的亲水性聚合物或共聚物的第二聚合物; （b）将所述第一和第二聚合物溶解在与两种聚合物相容的溶剂体系中，所述溶剂系统包含非质子有机溶剂和醇的共混物; （c）将所得溶液涂布在支撑体上; （d）至少对所得涂层进行部分干燥; 和（e）在水性介质中洗涤涂层，以提取至少50重量％的所述第二聚合物。 包含由上述方法制成的微孔膜的图像承载构件，优选包括也是微孔的载体。