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특허 상세정보

Method and apparatus for microcellular polymer extrusion

국가/구분 United States(US) Patent 등록
국제특허분류(IPC7판) B29D-007/00   
미국특허분류(USC) 521/079 ; 264/045.9 ; 264/046.1
출원번호 US-0258625 (1999-02-26)
발명자 / 주소
출원인 / 주소
대리인 / 주소
    Wolf, Greenfield & Sacks, P.C.
인용정보 피인용 횟수 : 76  인용 특허 : 43
초록

Continuous polymeric extrusion nucleation systems and methods useful for making polymeric microcellular foamed materials, including crystalline and semi-crystalline polymeric microcellular materials, are provided. Pressure drop rate is an important feature in some embodiments, and the invention provides systems for controlling these and other parameters. One aspect involves a multiple-pathway nucleator that is separated from a shaping die by a residence chamber. Another aspect involves a die for making advantageously thick articles, including a multiple-...

대표
청구항

[ What is claimed is:] [1.]1. A method comprising:establishing a first stream of a fluid, polymeric material;admixing the first stream with a blowing agent to form a single-phase solution; andcontinuously nucleating the solution by dividing the stream into separate portions and separately nucleating each of the separate portions at a rate sufficient to form a microcellular polymeric material.

이 특허에 인용된 특허 (43)

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