IPC분류정보
국가/구분 |
United States(US) Patent
등록
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국제특허분류(IPC7판) |
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출원번호 |
US-0590514
(2012-08-21)
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등록번호 |
US-9315300
(2016-04-19)
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발명자
/ 주소 |
- Moras, Wayne J.
- Long, Steven P.
- Holt, Stephen H.
- Horstmeyer, Ryan M.
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출원인 / 주소 |
- REYNOLDS CONSUMER PRODUCTS INC.
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대리인 / 주소 |
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인용정보 |
피인용 횟수 :
0 인용 특허 :
18 |
초록
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Drawtape includes a film of a polymeric blend of a minor polymer component of linear low density polyethylene and a major polymer component of medium density polyethylene and/or high density polyethylene. The drawtape of the disclosed subject matter is capable of a strong seal with a commercial poly
Drawtape includes a film of a polymeric blend of a minor polymer component of linear low density polyethylene and a major polymer component of medium density polyethylene and/or high density polyethylene. The drawtape of the disclosed subject matter is capable of a strong seal with a commercial polymeric bag, and provides a high elongation prior to tape failure or seal failure. Drawtape bag and method of making the drawtape are also provided.
대표청구항
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1. A drawtape comprising: a film of a polymeric blend including:between about 25 wt % and about 30 wt % linear low density polyethylene; anda major polymer component selected from medium density polyethylene, high density polyethylene, or combinations thereof. 2. The drawtape of claim 1, wherein the
1. A drawtape comprising: a film of a polymeric blend including:between about 25 wt % and about 30 wt % linear low density polyethylene; anda major polymer component selected from medium density polyethylene, high density polyethylene, or combinations thereof. 2. The drawtape of claim 1, wherein the film comprises about 25 wt % linear low density polyethylene. 3. The drawtape of claim 1, wherein the linear low density polyethylene has a melt index of between about 0.25 and about 3.0 grams per 10 minutes per ASTM D1238 (2010). 4. The drawtape of claim 1, wherein the linear low density polyethylene has a melt index of between about 0.50 and about 1.0 grams per 10 minutes per ASTM D1238 (2010). 5. The drawtape of claim 1, wherein the linear low density polyethylene has a melt index of between about 0.80 and about 0.90 grams per 10 minutes per ASTM D1238 (2010). 6. The drawtape of claim 1, wherein the linear low density polyethylene has a base density of between about 0.910 and 0.925 grams per cubic centimeter per ASTM D792 (2008). 7. The drawtape of claim 1, wherein the linear low density polyethylene has a base density of between about 0.916 and 0.920 grams per cubic centimeter per ASTM D792 (2008). 8. The drawtape of claim 1, wherein the linear low density polyethylene includes an alpha olefin comonomer. 9. The drawtape of claim 1, wherein the linear low density polyethylene includes a comonomer having from 4 to 8 carbon atoms. 10. The drawtape of claim 1, wherein the linear low density polyethylene includes a comonomer selected from propylene, 1-butene, 1-pentene, 1-hexene, and 1-octene. 11. The drawtape of claim 1, wherein the major polymer has a melt index of between about 0.050 and about 0.50 grams per 10 minutes per ASTM D1238 (2010). 12. The drawtape of claim 1, wherein the major polymer has a melt index of between about 0.10 and about 0.20 grams per 10 minutes per ASTM D1238 (2010). 13. The drawtape of claim 1, wherein the major polymer has a base density of between about 0.926 and about 0.959 grams per cubic centimeter per ASTM D792 (2008). 14. The drawtape of claim 1, wherein the major polymer has a base density of between about 0.939 and about 0.940 grams per cubic centimeter per ASTM D792 (2008). 15. The drawtape of claim 1, further comprising an additive selected from a colorant, a slip additive, an antiblock agent, a processing aid, or combinations thereof. 16. The drawtape of claim 1, wherein the drawtape is a single layer. 17. A drawtape bag comprising: first and second thermoplastic body panels joined along a pair of opposing sides and a bottom bridging the opposing sides, the joined first and second body panels defining a mouth disposed opposite the bottom; anda drawtape disposed proximate the mouth of the bag, the drawtape comprisinga film of a polymeric blend including: a) between about 25 wt % and about 30 wt % linear low density polyethylene; andb) a major polymer component selected from medium density polyethylene, high density polyethylene, or combinations thereof. 18. The drawtape bag of claim 17, where the drawtape has a load carrying capacity of at least about 10 lbs in a tensile direction in an ASTM D882 (2010) test. 19. The drawtape bag of claim 18, where the drawtape has a load carrying capacity of less than or equal to about 17 lbs in a tensile direction in an ASTM D882 (2010) test. 20. The drawtape bag of claim 18, where the drawtape has a load carrying capacity of at least about 14 lbs in a tensile direction in an ASTM D882 (2010) test. 21. The drawtape bag of claim 20, where the drawtape has a load carrying capacity of less than or equal to about 17 lbs in a tensile direction in an ASTM D882 (2010) test. 22. The drawtape bag of claim 17, wherein the drawtape has an elongation at break of at least about 425% in an ASTM D882 (2010) test. 23. The drawtape bag of claim 22, wherein the drawtape has an elongation at break of about 460% in an ASTM D882 (2010) test. 24. The drawtape bag of claim 17, wherein the drawtape is secured to at least one of the first and second panels. 25. The drawtape bag of claim 24, wherein the drawtape is secured by a thermal bond. 26. The drawtape bag of claim 25, wherein the drawtape is capable of at least about 120% elongation without failure of the drawtape or the thermal bond in a Tape Pull Test. 27. The drawtape bag of claim 26, wherein the drawtape is capable of about 138% elongation without failure of the drawtape or the thermal bond in a Tape Pull Test. 28. A method of making a drawtape comprising: providing a polymeric blend comprising a) between about 25 wt % and about 30 wt % linear low density polyethylene; andb) a major polymer component selected from medium density polyethylene, high density polyethylene, or combinations thereof;forming the polymeric blend into a film; andshaping the film into a drawtape. 29. The method of claim 28, further comprising dry blending the linear low density polyethylene with the major polymer component. 30. The method of claim 28, wherein the film is highly oriented in the machine direction when forming the polymeric blend into a film. 31. The method of claim 28, wherein said forming includes film blowing.
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