[특허]Laminate

Laminate 원문보기

IPC분류정보
국가/구분	United States(US) Patent 등록
국제특허분류(IPC7판)	B65D-051/20 B32B-027/08 B32B-037/20 B32B-037/15
출원번호	US-0284526 (2011-10-28)
등록번호	US-10005598 (2018-06-26)
우선권정보	GB-06126645.8 (2006-12-20)
발명자 / 주소	McLean, Andrew Fenwick Sachs, Victor Thornhill, Craig Warren
출원인 / 주소	Selig Sealing Products, Inc.
대리인 / 주소	Fitch, Even, Tabin & Flannery, LLP
인용정보	피인용 횟수 : 0 인용 특허 : 71

초록 ▼

A primary laminate including a tabstock in which a seal laminate including a foil layer and a top foam layer, a tabstock and a plastic film stock are fed to a laminating station is provided herein. At the lamination station, a curtain of polymeric adhesive is extruded between the plastics film stock and the top face of the primary substrate, which is partly comprised of the top face of the tabstock and partly comprised of the top foam layer of the seal laminate. Use of primary laminates obtained by such a process to form seals for sealing a container, for food or drink stored at low temperatures, is also described.

대표청구항 ▼

1. A primary laminate comprising: a seal laminate including a heat seal layer for sealing to a container, a foil layer and a top foam layer;a tabstock which has a top and a bottom face wherein the bottom face is in contact with the top foam layer of the seal laminate;a layer of plastic film adhered to the top face of the tabstock and to the top foam layer by a random copolymer of ethylene and alkyl acrylate and having a melt flow index in the range of 1 to less than 5 dg/min (190° C., 2.16 kg); andwherein the random copolymer of ethylene and alkyl acrylate bonds the layer of plastic film to the top foam layer so that the layer of plastic film does not delaminate therefrom when subjected to a low temperature freezer test by exposing a sealed container with the primary laminate to a temperature from about 0° C. to about −30 to form a cold primary laminate and when applying a removal force to the cold primary laminate for removal of the cold primary laminate from the container. 2. The primary laminate according to claim 1, wherein the random copolymer of ethylene and alkyl acrylate has a melt point of about 70 to about 100° C. and a density of about 0.92 to about 0.955 g/cm3. 3. The primary laminate according to claim 1, wherein the random copolymer of ethylene and alkyl acrylate is a copolymer of ethylene and C1-12 alkyl acrylate esters. 4. The primary laminate according to claim 1, wherein the random copolymer of ethylene and alkyl acrylate is an ethylene methyl acrylate copolymer effective to provide an initial peel strength between the layer of plastic film and the top foam layer of greater than 15N/12.5 mm at 330 mm/min. 5. The primary laminate according to claim 1, wherein the random copolymer of ethylene and alkyl acrylate has a melt point of about 70 to about 100° C. and the top foam layer has a higher melt point of about 120° C. to about 129° C. 6. The primary laminate according to claim 1, wherein the layer of plastic film is a co-extruded polyester film. 7. A pull-tab sealing member constructed to be secured to a rim surrounding an opening of a container, the pull-tab sealing member comprising: a seal laminate having a bottom heat seal layer for bonding to a rim of a container and a top foam layer;a tab having a top and a bottom face wherein the bottom face is in contact with but not bonded to the top foam layer of the seal laminate so that the tab lies wholly within a perimeter of the pull-tab sealing member;a layer of plastic film forming a portion of the tab and adhered to the top foam layer of the seal laminate by an extruded polymeric adhesive; andthe extruded polymeric adhesive is a random copolymer of ethylene and alkyl acrylate and has a melt flow index in the range of 1 to less than 5 dg/min (190° C., 2.16 kg) effective to bond the layer of plastic film to the top foam layer so that the layer of plastic film does not delaminate therefrom upon a removal force applied to the tab when the pull-tab sealing member is exposed to temperatures from about −30° C. to about 0° C. 8. The pull-tab sealing member according to claim 7, wherein the polymeric adhesive has a melt point of about 70 to about 100° C. and a density of about 0.92 to about 0.955 g/cm3. 9. The pull-tab sealing member of claim 7, wherein the polymeric adhesive has a melt point of about 70 to about 100° C. and the top foam layer has a higher melt point of about 120° C. to about 129° C. 10. The pull-tab sealing member according to claim 7, wherein the polymeric adhesive is a copolymer of ethylene and C1-12 alkyl acrylate esters. 11. The pull-tab sealing member according to claim 7, wherein the polymeric adhesive is an ethylene methyl acrylate copolymer effective to provide an initial peel strength between the layer of plastic film and the top foam layer of greater than 15N/12.5 mm at 330 mm/min. 12. The pull-tab sealing member according to claim 7, wherein the layer of plastic film is a co-extruded polyester film. 13. A pull-tab sealing member constructed to be secured to a rim surrounding an opening of a container, the pull-tab sealing member comprising: a seal laminate having a bottom heat seal layer for bonding to a rim of a container and a top polymer foam layer;a layer of polymer film partially adhered to the top polymer foam layer of the seal laminate by a random copolymer of ethylene and alkyl acrylate to form a tab defined by a portion of the polymer film layer not adhered to the top polymer foam layer so that the defined tab lies wholly within a perimeter of the pull-tab sealing member; andthe random copolymer of ethylene and alkyl acrylate is a random copolymer of ethylene and C1-12 alkyl acrylate esters with a mole percentage of the acrylate between 0.5 and 25 percent and has a melt flow index from 1 to less than 5 dg/min (190° C., 2.16kg) effective to bond the layer of plastic film to the top foam layer so that the layer of plastic film does not delaminate therefrom upon a removal force applied to the tab throughout a temperatures from about −30° C. to about 0° C. 14. The pull-tab sealing member according to claim 13, wherein the random copolymer of ethylene and alkyl acrylate has a melt point of about 70 to about 100° C. and a density of about 0.92 to about 0.955 g/cm3. 15. The pull-tab sealing member according to claim 14, wherein the random copolymer of ethylene and alkyl acrylate is a random copolymer of ethylene methyl acrylate in an amount effective to provide an initial peel strength between the layer of polyester film and the top polyolefin foam layer of greater than 15N/12.5 mm at 330 mm/min. 16. The pull-tab sealing member according to claim 13, wherein the layer of polymer film is a co-extruded polyester film.

이 특허에 인용된 특허 (71)

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IPC	Description
A	생활필수품
A62	인명구조; 소방(사다리 E06C)
A62B	인명구조용의 기구, 장치 또는 방법(특히 의료용에 사용되는 밸브 A61M 39/00; 특히 물에서 쓰이는 인명구조 장치 또는 방법 B63C 9/00; 잠수장비 B63C 11/00; 특히 항공기에 쓰는 것, 예. 낙하산, 투출좌석 B64D; 특히 광산에서 쓰이는 구조장치 E21F 11/00)
A62B-1/08	.. 윈치 또는 풀리에 제동기구가 있는 것

내보내기 구분	파일저장 인쇄 메일전송
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Laminate 원문보기

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