Method of producing films by means of coextrusion blow-moulding

Method of producing films by means of coextrusion blow-moulding

  • CN 1,571,722 A
  • Filed: 10/11/2002
  • Published: 01/26/2005
  • Est. Priority Date: 10/19/2001
  • Status: Active Application
First Claim
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1. method for preparing film, this film comprise the polymeric layer that one deck at least is selected from thermoplastic fluoropolymer and polymer (A), and wherein extrusion-blown modling method is:



  • coextrusion is following;

    A) one deck thermoplastic fluoropolymer and one layer of polymeric (A) at least at least,B) or at least one deck contains the thermoplastic fluoropolymer of filler and other polymer of one deck at least that can choose wantonly,C) or at least one layer of polymeric (A), a), b) or each layer of c) extruding adhere to each other,D) layer of another kind of thermoplastic polymer (B), thus its form in abutting connection with a), b) or c) in the compound layer of each layer extruded,E) can choose another layer (B) wantonly, it in abutting connection with a), b) or c) in each layer of extruding be compounded in d) reverse side of extruding layer;



    thermoplastic polymer (B) and fluoropolymer polymer and polymer (A) are incompatible and have enough extrudate intensity to support the layer of fluoropolymer and/or polymer (A);



    after the extrudate cooling, comprise at least a film that is selected from the thermoplastic fluoropolymer and the polymeric layer of polymer (A) to the major general and reclaim by separating from (B) layer.

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