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특허 상세정보

Low density paper and paperboard articles

국가/구분 United States(US) Patent 등록
국제특허분류(IPC7판) D21H-019/72   
미국특허분류(USC) 162/135; 162/169; 162/100; 162/134; 162/164.1; 229/400; 206/485.1
출원번호 US-0770340 (2001-01-26)
발명자 / 주소
출원인 / 주소
대리인 / 주소
    Luedeka, Neely & Graham, P.C.
인용정보 피인용 횟수 : 54  인용 특허 : 10
초록

The invention provides a low density paperboard material and associated method for use in producing an insulated container, and is especially well-suited for making cups. The paperboard material comprises a paperboard web including wood fibers and expanded microspheres, and has a relatively low density ranging from about 6 to about 10 lb/3MSF/mil, a relatively high caliper ranging from about 24 to about 35 mil, and an internal bond strength of at least about 80×10−3ft-lbf., preferably at least 100×10−3lft-lbf. For applications such as cups th...

대표
청구항

1. A method for making an insulated paperboard-based cup having a sidewall and a bottom which comprises providing a paperboard material comprising a paperboard web including from about 0.25 to about 10% by weight dry basis of expanded polymeric microspheres, a caliper of from about 24 to about 35 mils, an apparent density of from about 6.5 to about 10 lb/3MSF/mil, an internal bond of at least about 80×10−3ft-lbf, and a Sheffield smoothness of at least about 300 SU, and a barrier coating on at least one surface of the web having a thickness of from ...

이 특허를 인용한 특허 피인용횟수: 54

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