[특허]Heat sealable films from propylene and α-olefin units

[미국특허] Heat sealable films from propylene and α-olefin units 원문보기

IPC분류정보
국가/구분	United States(US) Patent 등록
국제특허분류(IPC7판)	B32B-027/06 B32B-027/32 C08L-023/16
출원번호	US-0588204 (2006-10-26)
등록번호	US-8617717 (2013-12-31)
발명자 / 주소	Williams, Michael Glenn Pip, Hans Joachim
출원인 / 주소	ExxonMobil Chemical Patents Inc.
인용정보	피인용 횟수 : 0 인용 특허 : 33

초록 ▼

A film structure having a base layer comprising a film-forming thermoplastic polymer; and a heat-seal layer having a seal-initiation temperature less than or about 130° C. and comprising from about 50 to about 98 wt % of a first polymer component and about 2 to about 50 wt % of a second polymer component. The first polymer component comprising propylene-derived units and, optionally, up to about 20 wt % of comonomer units derived from a C2 and/or C4-C20 α-olefin, and having a heat of fusion greater than 75 J/g and a melting point greater than or equal to 105° C. The second polymer component comprising at least 75 wt % propylene-derived units, and having a melting point less than 105° C. and a heat of fusion less than 75 J/g.

대표청구항 ▼

1. A heat sealable film structure comprising: (a) an unoriented or uniaxially oriented base layer comprising a metallocene-catalyzed isotactic polypropylene homopolymer having an isotacticity of from about 80 to 99%, a melting point from about 155° C. to about 165° C., and a melt flow rate (2.16 kg @ 230° C., ASTM D-1238) of from 0.5 g/10 min to about 15 g/10 min; and(b) a heat-seal layer having: a seal-initiation temperature ≦130° C.; and comprising from 80 wt % to 90 wt % of a first polymer component (FPC) and 10 wt % to 20 wt % of a second polymer component (SPC), based on the total weight of FPC and SPC, wherein: (i) the FPC comprises a polypropylene copolymer with 2 to 5 wt % comonomer and has a heat of fusion >75 J/g and a melting point ≧105° C.; and (ii) the SPC comprises from about 75 wt % to about 95 wt % propylene and from about 8 wt % to about 16 wt % ethylene, the SPC having a melting point of about 25° C. to about 65° C. and a heat of fusion 75 J/g and a melting point ≧105° C.; and(ii) the SPC consists essentially of from about 75 wt % to about 94 wt % propylene and from about 6 wt % to about 25 wt % ethylene, the SPC having a melting point of about 30° C. to about 60° C. and a heat of fusion <50 J/g,wherein the heat seal layer comprises 80 wt % or 90 wt % FPC and 10 wt % or 20 wt % SPC, and50 to 99 percent of the heat sealable film thickness is the base layer, andwherein the base layer further comprises a slip agent and the heat seal layer further comprises a slip agent and an anti-blocking agent. 14. The film of claim 13, wherein the FPC has a melt flow rate (2.16 kg @ 230° C., ASTM D-1238) of 5.6 g/10 min, an ethylene content of 3.5 wt %, a butene content of 6.4 wt %, and the balance propylene; and wherein the SPC comprises a propylene-ethylene random copolymer having a density of 0.855 g/cm3, an MFR (2.16 kg @ 230° C., ASTM D-1238) of 3.0 g/10 min, an Mw/Mn of 2, a melting point of 46.3° C. and a propylene content of 77.8 mol %.

이 특허에 인용된 특허 (33) 인용/피인용 타임라인 분석

Datta,Sudhin; Gadkari,Avinash Chandrakant; Cozewith,Charles, Alpha-olefin/propylene copolymers and their use.
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Sudhin Datta ; Jeffrey Middlesworth, Elastic films including crystalline polymer and crystallizable polymers of propylene.
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Tau, Li-Min; Chum, Pak-Wing S.; Karande, Seema; Bosnyak, Clive, Films comprising isotactic propylene copolymers.
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O\Brien Jeffrey J. (Walworth NY) Sexton Donald F. (Fairport NY), Heat sealable base films.
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Kiang Webster W. (Lisle IL), Heat sealable blend of polypropylene terpolymers and linear low density polyethylene.
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Mehta Aspy K. (Humble TX) Chen Michael C. (Duisburg-Tervuren BEX), Heat sealable blend of very low density polyethylene or plastomer with polypropylene based polymers and heat sealable fi.
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Van Loon, Achiel Jos, Heat sealable films.
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Weiner Milton L. (Rochester NY), Heat sealable packaging film comprising propylene polymer substrate and a surface layer blend of ethylene copolymer and.
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Weiner Milton L. (Rochester NY), Heat sealable packaging film comprising propylene polymer substrate and a surface layer blend of ethylene copolymer and.
상세보기
Weiner Milton L. (Rochester NY), Heat sealable packaging film comprising propylene polymer substrate and a surface layer blend of ethylene copolymer and.
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Weiner Milton L. (Rochester NY), Heat sealable packaging film comprising propylene polymer substrate and a surface layer blend of ethylene copolymer and.
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Weiner Milton L. (Rochester NY), Heat sealable packaging film comprising propylene polymer substrate and a surface layer of an ethylene copolymer and a d.
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Steiner Robert Henry (Rochester NY), Heat sealable thermoplastic films.
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Ferguson Daniel F. (Spartanburg SC) Stringer Frederick D. (Greenville SC) Esakov Michael D. (Greer SC), Heat sealable, multi-ply polypropylene film.
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Peiffer Herbert (Mainz DEX) Murschall Ursula (Nierstein DEX) Schloegl Gunter (Kelkheim DEX), Heat-sealable, oriented, multilayer polyolefin film, process for the production thereof, and the use thereof.
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Brew Joseph Edward (Newark NY) Keung Jay Kin (Macedon NY), High moisture barrier polypropylene-based film.
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Balloni Ricardo (Fairport NY) Nahmias A. Michael (Victor NY), Laminated packaging film.
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Balloni Ricardo (Fairport NY) Nahmias A. Michael (Victor NY), Laminated packaging film.
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Nakagawa Norihiko,JPX ; Sugi Masahiro,JPX ; Tanaka Yasuo,JPX, Laminating propylene/1-butene random copolymer composition and composite film using the same.
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Ashcraft, Charles R.; Park, Hee C., Lustrous satin appearing, opaque film compositions and method of preparing same.
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Liu Leland L. (Macedon NY) Cyr Patricia A. (Farmington NY), Method of forming a multilayer heat sealable film.
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Hein Carl C. (Pittsford NY) Wagner ; Jr. John R. (Rochester NY) Powell Mark S. (Egypt NY), Multilayer heat sealable oriented packaging film and method of forming same.
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Idlas Scott Allan, Multilayer plastic film, useful for packaging a cook-in foodstuff.
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Cozewith, Charles; Ju, Shiaw; VerStrate, Gary W., Narrow MWD alpha-olefin copolymers.
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Wagner ; Jr. John R. (Rochester NY) Hein Carl C. (Pittsford NY), Oriented multilayer heat sealable packaging film.
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Keller Lajos E. (Luxemburg LUX), Oriented polypropylene film structure.
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Knoerzer Anthony R. (Fairport NY), Oxygen and water vapor transmission resistant film and method.
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Last Anthony G. M. (Welwyn Garden City GB2), Polyolefin films.
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Setoh Ritsuo,JPX ; Satoh Makoto,JPX ; Inagaki Katsunari,JPX ; Ohara Jun,JPX, Polypropylene composition and laminated and oriented film therefrom.
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Steiner Robert H. (Rochester NY) Duncan Gary L. (Pittsford NY) Touhsaent Robert E. (Fairport NY), Polypropylene film with primer of a water dispersed epoxy resin coating.
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Kakugo Masahiro (Narashino JPX) Ogawa Tadatoshi (Ichihara JPX) Ima Seiichiro (Ichihara JPX) Yoshida Teruaki (Ichihara JPX), Polypropylene multi-layer film.
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Park Hee C. (Fairport NY) O\Brien Jeffrey J. (Walworth NY) Fosmire Christopher R. (Fairport NY), Resin composition, opaque film and method of preparing same.
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Matsuda Akira (Iwakuni JPX) Tojo Tetsuo (Ohtake JPX) Iwata Kazuo (Iwakuni JPX), Thermoplastic olefin resin composition and laminated film or sheet thereof.
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[미국특허] Heat sealable films from propylene and α-olefin units 원문보기