Shikoku Kakoh Co., Ltd., Mitsubishi Chemical Corporation
대리인 / 주소
Edwards & Angell, LLP
인용정보
피인용 횟수 :
4인용 특허 :
4
초록▼
The laminated film of the present invention comprises:an outermost layer (A) comprising a polybutylene terephthalate homopolymer, a polybutylene terephthalate copolymer or a mixture of the polybutylene terephthalate homopolymer and the polybutylene terephthalate copolymer; andan innermost layer (B)
The laminated film of the present invention comprises:an outermost layer (A) comprising a polybutylene terephthalate homopolymer, a polybutylene terephthalate copolymer or a mixture of the polybutylene terephthalate homopolymer and the polybutylene terephthalate copolymer; andan innermost layer (B) comprising a heat-sealing resin,the outermost layer (A) having a shape factor of not less than 2.2, which shows a peak shape of Raman spectrum thereof and is represented by the following formula (1): La/Lb (1)wherein La and Lb represent peak widths being present on higher- and lower-frequency sides, respectively, relative to a perpendicular line drawn from a peak top to a base line formed by a tangent line taken before and after the peak based on carbonyl stretching vibration, and being taken along a horizontal line at a height corresponding to one half of an intensity of the peak. The laminated film is prevented from being curled upon heat-sealing.
대표청구항▼
1. A laminated film produced by a co-extrusion inflation method, comprising:an outermost layer (A) comprising a polybutylene terephthalate homopolymer, a polybutylene terephthalate copolymer or a mixture of the polybutylene terephthalate homopolymer and the polybutylene terephthalate copolymer; anda
1. A laminated film produced by a co-extrusion inflation method, comprising:an outermost layer (A) comprising a polybutylene terephthalate homopolymer, a polybutylene terephthalate copolymer or a mixture of the polybutylene terephthalate homopolymer and the polybutylene terephthalate copolymer; andan innermost layer (B) comprising a heat-sealing resin,said outermost layer (A) having a shape factor of not less than 2.2, which shows a peak shape of Raman spectrum thereof and is represented by the following formula (1): La/Lb (1)Wherein La and Lb represent peak widths being present on higher- and lower-frequency sides, respectively, relative to a perpendicular line drawn from a peak top to a base line formed by a tangent line taken before and after the peak based on carbonyl stretching vibration, and being taken along a horizontal line at a height corresponding to one half of an intensity of the peak. 2. A laminated film according to claim 1, wherein said outermost layer (A) contains an anti-blocking agent. 3. A laminated film according to claim 2, wherein said anti-blocking agent is contained in an amount of 100 to 10,000 ppm based on the resin. 4. A laminated film according to claim 1, wherein said heat-sealing resin is selected from the group consisting off high-density polyethylene, medium density polyethylene, low-density polyethylene, polypropylene, ethylene-vinyl acetate copolymer, ethylene-methacrylate copolymer, ethylene-ethyl acrylate copolymer, ethylene-ethyl methacrylate copolymer, ethylene-acrylic acid copolymer, ethylene-methacrylic acid copolymer, adhesive polyethylene, ionomer resin, ethylene-vinyl acetate copolymer saponification product, linear low-density polyethylene and copolymers thereof. 5. A laminated film according to claim 1, wherein said outermost layer (A) has a thickness of 2 to 50 μm, and said innermost layer (B) has a thickness of 20 to 100 μm. 6. A laminated film according to claim 1, wherein the thickness of said innermost layer (B) is as large as two or more times the thickness of said outermost layer (A). 7. A laminated film according to claim 1, further comprising a gas-barrier resin layer (C) interposed between the outermost layer (A) and the innermost layer (B). 8. A laminated film according to claim 7, wherein said gas-barrier resin layer (C) is formed of polyamide, ethylene-vinyl acetate copolymer saponification product, polyethylene terephthalate, polyethylene naphthalate or polycarbonate. 9. A laminated film according to claim 7, wherein said gas-barrier resin layer (C) has a thickness of 5 to 70 μm. 10. A laminated film according to claim 1, further comprising an adhesive resin layer composed of a modified polyolefin resin, which is interposed between the respective layers. 11. A laminated film according to claim 10, wherein said adhesive resin layer has a thickness of 2 to 30 μm. 12. A laminated film according to claim 1, wherein the heat-shrinkage percentage in each of longitudinal (MD) direction and transverse (TD) direction of the film is not more than 5%. 13. A packaging bag obtained by heat-sealing the laminated film as defined in claim 1. 14. A packaging bag according to claim 13, which has a haze of 2 to 20%. 15. A laminated film produced by a co-extrusion inflation method, comprising:an outermost layer (A) comprising a polybutylene terephthalate homopolymer, a polybutylene terephthalate copolymer or a mixture of the polybutylene terephthalate homopolymer and the polybutylene terephthalate copolymer;an adhesive resin layer comprising a heat-sealing resin,an innermost layer (B) comprising a heat-sealing resin,said outermost layer (A) having a shape factor of not less than 2.2, which shows a peak shape of Raman spectrum thereof and is represented by the following formula (1): La/Lb (1)wherein La and Lb represent peak widths being present on higher- and lower-frequency sides, respectively, relative to a perpendicular line dr awn from a peak top to a base line formed by a tangent line taken before and after the peak based on carbonyl stretching vibration, and being taken along a horizontal line at a height corresponding to one half of an intensity of the peak. 16. A laminated film produced by a co-extrusion inflation method, comprising:an outermost layer (A) comprising a polybutylene terephthalate homopolymer, a polybutylene terephthalate copolymer or a mixture of the polybutylene terephthalate homopolymer and the polybutylene terephthalate copolymer;an adhesive resin layer comprising a modified polyolefin resin,a gas-barrier resin layer (C) comprising polyamide, an ethylene-vinyl acetate copolymer saponification product, polyethylene terephthalate, polyethylene naphthalate or polycarbonate;a second adhesive resin layer comprising a modified polyolefin resin; andan innermost layer (B) comprising a heat-sealing resin,said outermost layer (A) having a shape factor of not less than 2.2, which shows a peak shape of Raman spectrum thereof and is represented by the following formula (1): La/Lb (1)wherein La and Lb represent peak widths being present on higher- and lower-frequency sides, respectively, relative to a perpendicular line drawn from a peak top to a base line formed by a tangent line taken before and after the peak based on carbonyl stretching vibration, and being taken along a horizontal line at a height corresponding to one half of an intensity of the peak.
연구과제 타임라인
LOADING...
LOADING...
LOADING...
LOADING...
LOADING...
이 특허에 인용된 특허 (4)
Wnuk Andrew J. (Wyoming OH) Koger ; II Thurman J. (Hamilton OH) Young Terrill A. (Cincinnati OH), Biodegradable, liquid impervious multilayer film compositions.
Kunz Peter (Kreuzlingen CHX) Roncoroni Joachim (Radolfzell DEX) Rothschink Andreas (Konstanz DEX), Composites of plastic films and packaging made thereof.
※ AI-Helper는 부적절한 답변을 할 수 있습니다.