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Multilayer polymer film for a multichamber medical bag and process for fabrication thereof

  • US 6,017,598 A
  • Filed: 05/28/1996
  • Issued: 01/25/2000
  • Est. Priority Date: 03/29/1994
  • Status: Expired due to Term
First Claim
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1. A method of sealing a multilayer polymer film including two or more layers, which, at a first sealing temperature, forms a peelable bond and, at a second higher sealing temperature, forms a permanent bond, wherein the sealing layer has a matrix phase polymer system, wherein the matrix polymer is a polyethylene homopolymer, a polyethylene copolymer, a polypropylene homopolymer, or a polypropylene copolymer and the phase polymer is a styrene ethylene/butylene styrene triblock polymer with a styrene ethylene/butylene diblock component, a styrene ethylene/propylene styrene triblock polymer, a styrene butadiene styrene triblock polymer, and/or a styrene isoprene styrene triblock polymer, which method comprises forming a seam which can be separated by a force in the range of 5 to 20 N/mm2 by sealing the film at a temperature in the range of from 123°

  • C. to 128°

    C.

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