A heat-shrinkable film suitable for use in fabricating bags for packaging frozen poultry. The film composition comprises a resin mixture of between about 75 and about 95 weight percent of an ethylene-vinyl acetate copolymer having a vinyl acetate content of from at least about 1.7 to about 5.0 weigh
A heat-shrinkable film suitable for use in fabricating bags for packaging frozen poultry. The film composition comprises a resin mixture of between about 75 and about 95 weight percent of an ethylene-vinyl acetate copolymer having a vinyl acetate content of from at least about 1.7 to about 5.0 weight percent, and having a melt index of from at least about 0.15 to about 0.35 decigram per minute; and between about 5 and about 25 weight percent of a polyethylene material selected from the group consisting of: (a) high density polyethylene having a melt index of between about 0.15 and about 0.70 decigram per minute, and a density of between about 0.94 and about 0.96 grams per cubic centimeter, and (b) low pressure-low density polyethylene having a melt index of between about 0.3 and about 3.0 decigrams per minute, and a density of between about 0.915 and about 0.925 gram per cubic centimeter.
대표청구항▼
1. A heat-shrinkable film, suitable for used in fabricating bags for packaging frozen poultry, comprising a mixture of between about 75 and about 95 percent by weight, based on the weight of said film, of an ethylene-vinyl acetate copolymer having a vinyl acetate content of from at least about 1.7 t
1. A heat-shrinkable film, suitable for used in fabricating bags for packaging frozen poultry, comprising a mixture of between about 75 and about 95 percent by weight, based on the weight of said film, of an ethylene-vinyl acetate copolymer having a vinyl acetate content of from at least about 1.7 to about 5.0 percent by weight, based on the weight of said ethylene-vinyl acetate copolymer, and having a melt index of from at least about 0.15 to about 0.35 decigram per minute; and between about 5 and about 25 percent by weight, based on the weight of said film, of a polyethylene material selected from the group consisting of: (a) low pressure-high density polyethylene having a melt index of between about 0.15 and about 0.70 decigram per minute, and a density of between about 0.94 and about 0.96 gram per cubic centimeter, and (b) low pressure-low density polyethylene having a melt index of between about 0.3 and about 3.0 decigrams per minute, and a density of between about 0.915 and about 0.925 gram per cubic centimeter. 2. The film of claim 1 wherein said ethylene-vinyl acetate copolymer has a vinyl acetate content of between about 2.25 and about 4.5 percent by weight and a melt index of between about 0.2 and about 0.3 decigram per minute. 3. The film of claim 1 wherein said low pressure-low density polyethylene is a copolymer formed from ethylene and a comonomer selected from the group consisting of butene, pentene, hexene, heptene and octene, and mixtures thereof. 4. The film of claim 1 wherein said polyethylene material comprises between about 10 and about 20 percent by weight of the film. 5. The film of claim 3 wherein said copolymer has a melt index of between about 0.3 and about 3.0 decigrams per minute. 6. The film of claim 3 wherein said copolymer has a melt index of between about 0.5 and about 2.0 decigrams per minute, and a density of between about 0.915 and about 0.920 gram per cubic centimeter. 7. The film of claim 1 wherein said low pressure-low density polyethylene is a heterogeneous copolymer formed from ethylene, and at least one comonomer selected from the group consisting of propylene and butene-1, and at least one C 5 -C 8 comonomer. 8. The film of claim 7 wherein said copolymer has a density of between about 0.91 and about 0.94 gram per cubic centimeter, and a melt index of between about 0.3 and about 3.0 decigrams per minute. 9. The film of claim 7 wherein said copolymer has a melt index of between about 0.5 and about 2.0 decigrams per minute, and a density of between about 0.915 and about 0.925 gram per cubic centimeter. 10. The film of claim 1 wherein said low pressure-high density polyethylene has a melt index of between about 0.15 and about 0.3 decigram per minute, a density of between about 0.945 and about 0.955 gram per cubic centimeter. 11. The film of claim 10 wherein said low pressure-low density polyethylene has a melt index of between about 0.5 and about 2.0 decigrams per minute, and a density of between about 0.915 and about 0.920 gram per cubic centimeter. 12. The film of claim 1 fabricated in the form of a bag. 13. A heat-shrinkable film suitable for use in fabricating bags for packaging frozen poultry, comprising a mixture of from about 75 to about 90 percent by weight, based on the weight of said film, of an ethylene-vinyl acetate copolymer having a vinyl acetate content of between about 1.7 and about 5.0 percent by weight of said copolymer, and having a melt index of between about 0.15 and about 0.35 decigram per minute; and between about 10 and about 25 percent by weight, based on the weight of said film, of a polyethylene material selected from the group consisting of: (a) low pressure-high density polyethylene having a melt index of between about 0.15 and about 0.70 decigram per minute, and a density of between about 0.94 and about 0.96 gram per cubic centimeter, and (b) low pressure-low density polyethylene having a melt index of between about 0.3 and about 3.0 decigrams per minute, and a density of between about 0.915 and about 0.925 gram per minute. 14. The film of claim 13 wherein said ethylene-vinyl acetate copolymer has a melting point of about 103° C. to about 106° C. 15. The film of claim 13 wherein said ethylene-vinyl acetate copolymer has a vinyl acetate content of between about 2.25 and to about 4.5 percent by weight, based on the weight of said copolymer, a melt index of between about 0.2 to about 0.3 decigram per minute, and a density of about 0.917 gram per cubic centimeter. 16. The film of claim 13 wherein said film has a thickness of from about 1.5 mils to about 2.75 mils. 17. The film of claim 13 fabricated in the form of a bag. 18. A resin mixture comprising between about 75 to about 95 percent by weight of an ethylene-vinyl acetate copolymer having a vinyl acetate content of from at least about 1.7 to about 5.0 percent by weight, based on the weight of said ethylene-vinyl acetate copolymer, and having a melt index of from about 0.15 to about 0.35 decigram per minute; and between about 5 and about 25 percent by weight, based on the weight of said resin mixture, of a polyethylene material selected from the group consisting of: (a) low pressure-high density polyethylene having a melt index of between about 0.15 and about 0.70 decigram per minute, and a density of between about 0.94 and about 0.96 gram per cubic centimeter, and (b) low pressure-low density polyethylene having a melt index of between about 0.3 and about 3.0 decigrams per minute, and a density of between about 0.915 and about 0.925 gram per centimeter. 19. A resin mixture as in claim 18 wherein said ethylene-vinyl acetate copolymer has a vinyl acetate content of between about 2.25 and about 4.5 percent by weight and a melt index of between about 0.20 and about 0.30 decigram per minute. 20. A resin mixture as in claim 18 wherein said low pressure-low density polyethylene is a copolymer formed from ethylene and a comonomer selected from the group consisting of butene, pentene, hexene, heptene and octene, and mixtures thereof. 21. A resin mixture as claimed in claim 18 wherein said polyethylene material comprises between about 10 and about 20 percent by weight of said resin mixture. 22. A resin mixture as in claim 20 wherein said copolymer has a melt index of between about 0.3 and about 3.0 decigrams per minute. 23. A resin mixture as in claim 20 wherein said copolymer has a melt index of between about 0.5 and about 2.0 decigrams per minute, and a density of between about 0.915 and about 0.920 gram per cubic centimeter. 24. A resin mixture as in claim 18 wherein said low pressure-low density polyethylene is a heterogeneous copolymer formed from ethylene, and at least one comonomer selected from the group consisting of propylene and butene-1, and at least one C 5 -C 8 comonomer. 25. A resin mixture as in claim 24 wherein said copolymer has a density of between about 0.91 and about 0.94 gram per cubic centimeter and a melt index of between about 0.3 and about 3.0 decigrams per minute. 26. A resin mixture as in claim 24 wherein said copolymer has a melt index of between about 0.5 and about 2.0 decigrams per minute, and a density of between about 0.915 and about 0.925 gram per cubic centimeter. 27. A resin mixture as in claim 18 wherein said low pressure-high density polyethylene has a melt index of between about 0.15 and about 0.3 decigram per minute, and a density of between about 0.945 and about 0.955 gram per cubic centimeter. 28. A resin mixture as in claim 27 wherein said low pressure-low density polyethylene has a melt index of between about 0.5 and about 2.0 decigrams per minute, and a density of between about 0.915 and about 0.920 gram per cubic centimeter. 29. A resin mixture comprising from about 80 to about 90 percent by weight of an ethylene-vinyl acetate copolymer having a vinyl acetate content of between about 1.7 and about 5.0 percent by weight of said copolymer, and having a melt index of between about 0.15 and about 0.35 decigram per minute; and between about 10 and about 20 percent by weight, based on the weight of said resin mixture, of a polyethylene material selected from the group consisting of: (a) low pressure-high density polyethylene having a melt index of between about 0.15 and about 0.70 decigram per minute, and a density of between about 0.94 and about 0.96 gram per cubic centimeter, and (b) low pressure-low density polyethylene having a melt index of between about 0.3 and about 3.0 decigrams per minute, and a density of between about 0.915 and about 0.925 gram per cubic centimeter. 30. A resin mixture as in claim 29 wherein said ethylene-vinyl acetate copolymer has a melting point of about 103° C. to about 106° C. 31. A resin mixture as in claim 29 wherein said ethylene-vinyl acetate copolymer has a vinyl acetate content of between about 2.25 to about 4.5 percent by weight, based on the weight of said copolymer, a melt index of between about 0.20 to about 0.30 decigram per minute, and a density of about 0.917 gram per cubic centimeter. 32. A resin mixture as in claim 29 wherein said mixture is in the form of an extruded film having a thickness of from about 1.5 mils to about 2.75 mils. 33. A resin mixture as in claim 32 wherein said film is fabricated in the form of a bag.
연구과제 타임라인
LOADING...
LOADING...
LOADING...
LOADING...
LOADING...
이 특허에 인용된 특허 (11)
Yoshikawa Shinsuke (Iwaki JPX) Hisazumi Nobuyuki (Iwaki JPX) Yamamoto Masataka (Iwaki JPX), Biaxially stretched five-layer film for packaging food.
Yoshimura Isao (Kawaski JPX) Hata Hideo (Kawaski JPX) Kaneko Takashi (Kawaski JPX), Composition for drawn film, cold drawn film made of said composition and process for manufacture of said film.
Lustig Stanley (Park Forest IL) Vicik Stephen J. (Darien IL) Kohler William J. (Westmont IL), Heat shrinkable multilayer packaging film of blended copolymers and elastomers.
Kurtz Stuart J. (Martinsville NJ) Apgar ; Jr. Howard G. (Bedminster NJ), Linear low density ethylene hydrocarbon copolymer containing composition for extrusion coating.
Karim Khalid A. (Houston TX) Lakshmanan Pallavoor R. (Houston TX) Rea James H. (Houston TX), Polymer compositions and laminates produced by bonding or coextrusion.
※ AI-Helper는 부적절한 답변을 할 수 있습니다.