Porous laminated, super absorbent, hydratable, temperature control pack system
IPC분류정보
국가/구분
United States(US) Patent
등록
국제특허분류(IPC7판)
F25D-003/08
출원번호
US-0079872
(1998-05-15)
발명자
/ 주소
Murray Joseph C.
Don Gaude Lyman E.
Gabel Kimberly Lynn
출원인 / 주소
Thermal Products, Inc.
대리인 / 주소
Pugh AssociatesPugh
인용정보
피인용 횟수 :
13인용 특허 :
5
초록▼
A hydratable packet pad (10) comprising a series of spaced, packet cells (17) made up of a backing sheet (11), preferably of an impervious plastic sheet material, e.g., polyester film, and an upper, porous, sheet (12) permeable to water, of, for example, non-woven polypropylene without any additive(
A hydratable packet pad (10) comprising a series of spaced, packet cells (17) made up of a backing sheet (11), preferably of an impervious plastic sheet material, e.g., polyester film, and an upper, porous, sheet (12) permeable to water, of, for example, non-woven polypropylene without any additive(s), with a tacky sealant (13), [e.g., 22.5% ethylene-methyl-acrylate (EMA)], used to affix and seal the two sheets together in a process forming the cells and to initially hold the polymer powder in the cell areas, which are initially deposited on the film in a squat cone, prior to the cells being formed. Within each cell of the packet is a superabsorbent polymeric material (14) of a multiply-cross-linked polymer, for example, a doubly cross-linked sodium polyacrylate polymer. The superabsorbent material also preferably includes no alcohol (OH) functional groups, and the sheeting materials preferably contain no cellulose materials. The superabsorbent polymer also preferably is of the type that is particularly effective in absorbing water. In comparison to the prior art, 1994 predecessor product, the preferred embodiment of the present invention shows over an eight-to-one (>8:1) improvement factor in the thaw time of the pad, indicating a difference in kind, rather than merely of degree, as well as a number of other improvements (note, e.g., the bar chart test results summary of FIG. 6).
대표청구항▼
[ We claim:] [1.]1. A hydratable packet (10) for producing for juxtaposed goods a temperature environment substantially different in temperature from the ambient for a significant period of time, comprising:a backing sheet (11);a porous sheet (12) with said backing sheet and said porous sheet being
[ We claim:] [1.]1. A hydratable packet (10) for producing for juxtaposed goods a temperature environment substantially different in temperature from the ambient for a significant period of time, comprising:a backing sheet (11);a porous sheet (12) with said backing sheet and said porous sheet being attached together at selected portions thereof;a heat activated sealant layer (13) on at least one of the sheets affixing said sheets (11 & 12) together, said sealant being ethylene-methyl-acrylate (EMA); andsuperabsorbent material (14) contained between said sheets, said superabsorbent material being a multiply-cross-linked polymer, superabsorbent to water.
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이 특허에 인용된 특허 (5)
Anderson Leslie B. (Easton PA), Absorbent assembly for use as a thermal pack.
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