Process for packaging plastic materials like hot melt adhesives
원문보기
IPC분류정보
국가/구분
United States(US) Patent
등록
국제특허분류(IPC7판)
B65B-063/08
B65B-063/00
B65B-009/12
B65B-009/10
출원번호
US-0976943
(2004-10-29)
등록번호
US-7328547
(2008-02-12)
발명자
/ 주소
Mehta,Atul
Neperud,Michael A.
Sajot,Nicolas E.
Chiarabini,Dominique
Morel Fourrier,Chrisophe
출원인 / 주소
Bostik, Inc.
대리인 / 주소
Andrus, Sceales, Starke & Sawall, LLP
인용정보
피인용 횟수 :
24인용 특허 :
31
초록▼
A method for packaging plastic material using a film to surround the material, and more particularly to a method for packaging hot melt adhesives, the resulting package formed thereby, and the film composition used therein. The method is preferably a coextrusion process for packaging a pressure sens
A method for packaging plastic material using a film to surround the material, and more particularly to a method for packaging hot melt adhesives, the resulting package formed thereby, and the film composition used therein. The method is preferably a coextrusion process for packaging a pressure sensitive hot melt adhesive by extruding a hot melt adhesive through a die orifice, and coextruding a wax-based polymeric film to surround the hot melt adhesive. The coated adhesive may then be formed into individual packaged units having a finite size and shape. The polymeric film comprises a composition having at least 25% by weight of a wax material, an enthalpy of fusion of at least about 100 J/g, and an elongation value at break of at least about 100%. Any type of hot melt adhesive formulation can be packaged or surrounded by the polymeric film in the process. Also, the specific enthalpy of fusion desired and/or elongation value at break desired for the polymeric film can be obtained by blending an appropriate amount of partially crystalline ethylene-based polymer together with a thermoplastic elastomeric block copolymer and/or an ethylene based or propylene-based elastomer.
대표청구항▼
We claim: 1. A method of packaging a plastic mass, comprising the steps of: providing a plastic mass, and surrounding the plastic mass with a polymeric film, said polymeric film comprising a composition having at least 25% by weight of a wax material, an enthalpy of fusion of at least about 100 J/g
We claim: 1. A method of packaging a plastic mass, comprising the steps of: providing a plastic mass, and surrounding the plastic mass with a polymeric film, said polymeric film comprising a composition having at least 25% by weight of a wax material, an enthalpy of fusion of at least about 100 J/g, and an elongation value at break of at least about 100%. 2. The method of claim 1 wherein said wax material comprises at least 40% by weight of said film composition. 3. The method of claim 1 wherein said wax material comprises 25% to 65% by weight of said film composition. 4. The method of claim 1 wherein said wax material is selected from the group consisting of a petroleum wax, a synthetic wax, a polyolefin wax, an animal wax, a vegetable wax, and mixtures thereof. 5. The method of claim 4 wherein said petroleum wax is a paraffin wax. 6. The method of claim 4, wherein said synthetic wax is a Fischer-Tropsch wax. 7. The method of claim 4 wherein said polyolefin wax is selected from the group consisting of polyethylene, polypropylene, ethylene-based copolymers, propylene-based copolymers and mixtures thereof. 8. The method of claim 1 wherein said film composition includes about 5% to about 65% by weight of a partially crystalline ethylene-based polymer comprising a homopolymer, a copolymer, a terpolymer, or an interpolymer having a melt flow index of 0.05 g/10 min. to 800 g/10 min. at 190�� C. and a DSC melting point of 40�� C. to 130�� C. 9. The method of claim 8 wherein said ethylene-based polymer is selected from the group consisting of LDPE, VLDPE, LLDPE, MDPE, HDPE, EVA, EAA, EMA, EBA, EE2HA, EO, EP, EB EH, ESI and blends thereof. 10. The method of claim 8 wherein said ethylene-based polymer is EMA. 11. The method of claim 8 wherein said ethylene-based polymer is EO. 12. The method of claim 8 wherein said ethylene-based polymer is EB. 13. The method of claim 8 wherein said ethylene-based polymer has a melt flow index below 30 g/10 min. 14. The method of claim 8 wherein said ethylene-based polymer has a melt flow index below 7 g/10 min. 15. The method of claim 8 wherein said ethylene-based polymer has a DSC melting point below 100�� C. 16. The method of claim 1 wherein said film composition includes up to 40% by weight of a thermoplastic elastomeric block copolymer having a structure A-B, A-B-A, A-(B-A)n-B, or (A-B)n-Y wherein A comprises a polyvinyl aromatic block having a Tg higher than 80�� C., B comprises a rubbery midblock having a Tg lower than-10�� C., Y comprises a multivalent compound, and n is an integer of at least 3. 17. The method of claim 16 wherein said block copolymer is selected from the group consisting of SB, SBS, SIS, SIBS, SEBS, SEP, SEPS, SBBS and blends thereof. 18. The method of claim 16 wherein said block copolymer is SEBS. 19. The method of claim 16 wherein said block copolymer has a melt flow index below 15 g/10 min. at 190�� C. 20. The method of claim 16 wherein said block copolymer comprises 15% or less of said film composition. 21. The method of claim 1 wherein said film composition includes up to 25% by weight of an elastomer comprising a copolymer or terpolymer having a Tg lower than-10�� C., said elastomer selected from the group consisting of an ethylene-based elastomer, a propylene-based elastomer, and blends of ethylene-based and propylene-based elastomers. 22. The method of claim 21 wherein said elastomer is selected from the group consisting of EPR, EPDM and blends thereof. 23. The method of claim 21 wherein said elastomer is EPR having a propylene content of about 15% to 70% by weight. 24. The method of claim 21 wherein said elastomer is EPR having a propylene content of about 20% to 45% by weight. 25. The method of claim 21 wherein said elastomer is EPDM having an ethylene content of from about 20% to 80% by weight, a propylene content of from about 15% to 70% by weight, and a diene content of about 2% to 15% by weight. 26. The method of claim 21 wherein said elastomer comprises 15% or less of said film composition. 27. The method of claim 1 wherein the step of providing a plastic mass comprises extruding said plastic mass. 28. The method of claim 27 wherein said plastic mass comprises a hot melt adhesive composition. 29. The method of claim 27 wherein the step of surrounding the plastic mass comprises coextruding the polymeric film. 30. The method of claim 29 wherein said plastic mass comprises a hot melt adhesive composition. 31. The method of claim 29 further including the step of forming the extruded plastic mass and coextruded polymeric film into a unit of finite size and shape. 32. The method of claim 31 further including the step of sealing opposite ends of said unit. 33. The method of claim 1 wherein said plastic mass is a material selected from the group consisting of a thermoplastic composition, a thermoplastic compound, a thermoplastic polymer, a thermosetting composition, a thermosetting compound, a thermosetting polymer, a hot melt composition, a hot melt compound, a hot melt polymer, a hot melt adhesive composition, a hot melt adhesive compound, a hot melt adhesive polymer, and blends thereof. 34. The method of claim 1 wherein said plastic mass comprises a hot melt adhesive composition.
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이 특허에 인용된 특허 (31)
Cameron Janelle C. ; Fischer Carolyn A. ; Lehman Nicholas C. ; Lindquist Jeffrey S. ; Olson Christopher E. ; Fox Steve A., Hot melt adhesive pellet comprising continuous coating of pelletizing aid.
Cameron Janelle C. ; Fischer Carolyn A. ; Lehman Nicholas C. ; Lindquist Jeffrey S. ; Olson Christopher E. ; Fox Steve A., Method for making hot melt adhesive pellet comprising continuous coating of pelletizing aid.
Hatfield Stephen (Somerville NJ) Puletti Paul (Pittstown NJ) Giese Robert (Wall NJ) Thorpe Roger (Skillman NJ), Method for packaging hot melt adhesives.
Heuer Glenn C. ; Brand Norris R. ; Nelson Randall D. ; Weber Wolfgang,DEX, Method for packaging thermoplastic compositions comprising sufficiently cooling composition.
Hatfield Stephen (Somerville NJ) Gore Shelley (Neshanic Station NJ) Fame David (Newtown PA) Rindone Anthony (Flemington NJ), Method for tackless packaging of hot melt adhesives.
Peter Remmers DE; Joachim Baumung DE; Michelle M. Chanak ; Kevin W. McKay ; Thomas Wittkopf DE, Method of packaging a thermoplastic composition with a film having a low complex viscosity and corresponding packaged article.
Simmons Eugene R. ; Sweeney Kevin J. ; Lindquist Jeffrey S. ; Olson Christopher E. ; Carter Freddie C. ; Farmer James R., Polymeric composition in pellet form.
Simmons Eugene R. ; Sweeney Kevin J. ; Lindquist Jeffrey S. ; Olson Christopher E. ; Carter Freddie C. ; Farmer James R., Polymeric composition in pellet form.
McCoskey Steven L. (Longview TX) Hooker Stephen R. (Longview TX) Jarrell Don W. (Henderson TX) Somers Marc S. (Longview TX) Coe Stephen W. (Longview TX), Pourable particles of normally tacky plastic materials and process for their preparation.
Waagen Geert N. (Baarn NLX) Bastiaansen Cornelis W. M. (Dongen NLX) Kirschbaum Robert (Sittard NLX), Process for the preparation of ultrastretchable polymer material, ultrastretchable material, as well as a process for th.
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