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Polypropylene foam sheets 원문보기

IPC분류정보
국가/구분 United States(US) Patent 등록
국제특허분류(IPC7판)
  • C08J-009/08
  • C08J-009/14
출원번호 US-0493541 (1990-03-14)
발명자 / 주소
  • Park John J. (Neenah WI) Katz Leon (Stamford CT) Gaylord Norman G. (New Providence NJ)
출원인 / 주소
  • James River Corporation of Virginia (Richmond VA 02)
인용정보 피인용 횟수 : 81  인용 특허 : 0

초록 ▼

A thermoformable, rigid or semi-rigid polypropylene foam sheet having a smooth surface and a uniform cell structure and a density of at least 2.5 lbs/ft3 is prepared by extruding a mixture of a nucleating agent, a physical blowing agent and a polypropylene resin having a high melt strength and high

대표청구항 ▼

A foam sheet of a polypropylene characterized by at least (a) either z-average molecular weight Mz of at least 1.0×106 or a ratio of the z-average molecular weight Mz to weight average molecular weight Mw Mz/Mw of at least 3.0, and (b) either equilibrium compliance Jeo of at least 12×10-5 cm2/dyne o

이 특허를 인용한 특허 (81)

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