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1.发明公开PROCESS FOR PRODUCING THERMOPLASTIC FILMS BY BLOWN FILM EXTRUSION AND FILMS PRODUCED THEREBY 审中-公开吹塑用于生产热塑性薄膜和制作的电影热塑性
公开(公告)号：EP1171276A1
公开(公告)日：2002-01-16
申请号：EP00916138.1
申请日：2000-03-07
Applicant: THE DOW CHEMICAL COMPANY
Inventor： KLING, Susan, M. , LEE, Eric, K. , KRUIDENIER, Rene , DEBNEY, Martin, F.
CPC classification number: C08J7/047 , B29C37/0067 , B29C47/0026 , B29C47/0057 , B29C47/0059 , B29C47/065 , C08J2401/00 , Y10T428/3188 , Y10T428/31884 , Y10T428/31891
Abstract: A process for making a thermoplastic film by the blown film extrusion process comprises extruding a molten thermoplastic polymer through a tubular die to form a tube of molten polymer, contacting the inner surface of the tube of molten polymer as it exits the die with an aqueous solution of a water-soluble polysaccharide ether, inflating the tube of molten polymer to form a blown tubular film and then collapsing the blown film to a flat web. The thermoplastic film has on its surface a coating of a water-soluble polysaccharide ether.
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