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특허 상세정보

Method of forming foam moldings having varied density regions

국가/구분 United States(US) Patent 등록
국제특허분류(IPC7판) B29C-067/22   
미국특허분류(USC) 264/454 ; 264/451 ; 264/51 ; 264/126
출원번호 US-0879431 (1992-05-06)
우선권정보 DE-4040908 (1990-12-20)
발명자 / 주소
출원인 / 주소
인용정보 피인용 횟수 : 22  인용 특허 : 0
초록

Moldings made from polyolefin particle foams having a mean density of from 0.015 to 0.100 g/cm3 and having at least two different regions whose densities differ by from 0.005 to 0.030 g/cm3 have a transition zone between the different density regions having a thickness of not more than 25 mm. A method of forming the moldings, using removable mold dividing walls, is described.

대표
청구항

A process for the production of a molding having a mean density of from 0.015 to 0.100 g/cm3 and having at least two different regions whose densities differ by from 0.005 to 0.030 g/cm3, the transition zone between the different density regions having a thickness of not more than 25 mm, which process comprises introducing polyolefin foam particles having substantially the same density into individual chambers of a mold divided into at least two chambers by removable dividing walls, said chambers being filled at different pressures or applying different ...

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