IPC분류정보
국가/구분 |
United States(US) Patent
등록
|
국제특허분류(IPC7판) |
|
출원번호 |
US-0798632
(2001-03-02)
|
발명자
/ 주소 |
- Renn, Daniel John
- Jacobs, Steven
|
출원인 / 주소 |
- Saint- Gobain Performance Plastics Corporation
|
대리인 / 주소 |
Langton, Esq., Grant T.Jeffer, Mangels, Butler & Marmaro LLP
|
인용정보 |
피인용 횟수 :
1 인용 특허 :
7 |
초록
▼
Valve boxes of this invention comprise a housing including an inner chamber that extends axially through the housing from a housing base. The housing chamber includes a diameter that is defined by a housing sidewall surface that extends outwardly from the base, forming a chamber opening. The chamber
Valve boxes of this invention comprise a housing including an inner chamber that extends axially through the housing from a housing base. The housing chamber includes a diameter that is defined by a housing sidewall surface that extends outwardly from the base, forming a chamber opening. The chamber opening includes a seal surface that is positioned radially inwardly towards the chamber. The valve box further includes a lid that is positioned over the housing chamber opening. The lid includes a concave center section and a seal surface disposed radially therearound. The lid seal surface is positioned radially towards the chamber, and is placed opposite the chamber opening seal surface. An annular seal is interposed between the housing chamber and lid seal surfaces. The chamber and lid seal surfaces are configured generally perpendicular to the chamber opening, such that internal pressure within the chamber causes the concave center portion to impose a radially outwardly directed pressure onto the lid, thereby further compressing the annular seal to ensure a leak-tight seal.
대표청구항
▼
Valve boxes of this invention comprise a housing including an inner chamber that extends axially through the housing from a housing base. The housing chamber includes a diameter that is defined by a housing sidewall surface that extends outwardly from the base, forming a chamber opening. The chamber
Valve boxes of this invention comprise a housing including an inner chamber that extends axially through the housing from a housing base. The housing chamber includes a diameter that is defined by a housing sidewall surface that extends outwardly from the base, forming a chamber opening. The chamber opening includes a seal surface that is positioned radially inwardly towards the chamber. The valve box further includes a lid that is positioned over the housing chamber opening. The lid includes a concave center section and a seal surface disposed radially therearound. The lid seal surface is positioned radially towards the chamber, and is placed opposite the chamber opening seal surface. An annular seal is interposed between the housing chamber and lid seal surfaces. The chamber and lid seal surfaces are configured generally perpendicular to the chamber opening, such that internal pressure within the chamber causes the concave center portion to impose a radially outwardly directed pressure onto the lid, thereby further compressing the annular seal to ensure a leak-tight seal. ight percent tackifier; c) 0 to 35 weight percent wax; and d) optionally 1 to 25 weight percent of a second ethylene n-butyl acrylate, wherein the second ethylene n-butyl acrylate comprises 33 to 35 weight percent butyl acrylate with a melt index of 40 dg/min. 7. A cigarette filter according to claim 6 wherein the adhesive comprises: a) 15 to 45% ethylene n-butyl acrylate copolymers having a melt index of at least 200; b) 25 to 55% α-methyl styrene tackifying resins; and c) 15 to 40% of a low melting point paraffin wax. 8. A cigarette filter according to claim 6 wherein the adhesive further comprises a polymeric additive selected from the group consisting of ethylene methyl acrylate polymers containing 10 to 28 weight percent by weight methyl acrylate, ethylene acrylic acid copolymers having an acid number of 25 to 150, methyl (meth)acrylate copolymers, polyethylene, polypropylene, poly(butene-1-co-ethylene) polymers and low molecular weight and/or low melt index ethylene n-butyl acrylate copolymers, and combinations thereof. 9. A cigarette filter according to claim 1 wherein the adhesive comprises: a) from 20 to 40 weight percent of an ethylene/α-olefin. copolymer; b) from 20 to 40 weight percent tackifier; and c) from 10 to 40 weight percent wax. 10. A cigarette filter according to claim 9 wherein the ethylene/α-olefin copolymer has a composition distribution breath index greater than 50%, and Mw/Mn less than 6. 11. A cigarette filter according to claim 9 wherein the ethylene/α-olefin copolymer has a melt index of 40 to 1000 dg/mn melt point of 71 to 90° C., a density of 0.850 to 0.92, a composition distribution breath index greater than 50%, and Mw/Mn less than 6. 12. A cigarette filter according to claim 9 wherein the adhesive further comprises polymeric additive selected from the group consisting of ethylene methyl acrylate polymers containing 10 to 28 weight percent by weight methyl acrylate, ethylene acrylic acid copolymers having an acid number of 25 to 150, polyethylene, polypropylene, poly(butene-1-co-ethylene) polymers, ethylene n-butyl acrylate copolymers and ethylene vinyl acetate copolymers, and combinations thereof. 13. A cigarette filter according to claim 1 wherein the adhesive comprises ethylene vinyl acetate comprising 5 to 45 weight percent vinyl acetate with a melt index of at least 400 dg/min. 14. A cigarette filter according to claim 13 wherein the adhesive further comprises a second ethylene vinyl acetate copolymer, wherein the second ethylene vinyl acetate copolymer comprises 28 weight percent vinyl acetate with a melt index of 6 to 40 dg/min. 15. A cigarette filter according to claim 13 wherein the adhesive further comprises a polymeric additive selected from the group consisting of ethylene methyl acrylate polymers containing 10 to 28 weight percent by weight methyl acrylate, ethylene acrylic acid copolymers having an acid number of 25 to 150, methyl (meth)acrylate copolymers, polyethylene, polypropylene, poly(butene-1-co-ethylene) polymers and low molecular weight and/or low melt index ethylene n-butyl acrylate copolymers, and combinations thereof. 16. A cigarette filter according to claim 1 wherein the adhesive comprises 30 to 60 weight percent polyethylene polymer with melt index of 5000 to 2000 dg/min at 190° C., a density of 0.900 to 0.930, and a softening point less than 110° C. 17. A cigarette filter according to claim 1 wherein the adhesive comprises blends selected from the group consisting of blends of EnBA and EVA polymers; blends of polyethylene and EVA; blends of poly α-olefin and EVA; and combinations thereof. 18. A cigarette filter according to claim 1 wherein the hot melt adhesive comprises: a) 31 parts paraffin wax with a softening point of 150° F.; b) 21 parts ethylene vinyl acetate copolymer with a melt index of 400 and a vinyl acetate content of 28%; c) 11 parts or ethylene vinyl acetate copolymer with a melt index of 43 and a vinyl acetate content of 28%; d) 37 parts of alpha-methyl styrene tackifying resins; and e) 0.5 parts of an antioxidant stabilizer. 19. A cigarette filter according to claim 1 wherein the hot melt adhesive comprises: a) 50 parts polyethylene; b) 40 parts of an aliphatic-aromatic hydrocarbon tackifying resin; c) 10 parts of a microcrystalline wax with a softening point of 195° F.; and d) 0.2 parts of an antioxidant stabilizer. 20. The process for preparing a cigarette filter comprising applying a low application temperature hot melt adhesive to porous and/or nonporous plugwrap paper. 21. The process according to claim 20 wherein the adhesive comprises at least one ethylene copolymer. 22. The process according to claim 20 wherein the adhesive comprises ethylene n-butyl acrylate copolymer comprising 10 to 40 weight percent n-butyl acrylate with a melt index of at least 40 dg/min, and optionally a second ethylene n-butyl acrylate copolymer, wherein the second ethylene n-butyl acrylate copolymer comprises 25 to 35 weight percent n-butyl acrylate. 23. The process according to claim 20 wherein the adhesive comprises: a) 10 to 40 weight percent ethylene n-butyl acrylate comprising 10 to 40 weight percent n-butyl acrylate with a melt index of at least 400 dg/min; b) 10 to 60 weight percent tackifier; c) 0 to 35 weight percent wax; and d) optionally 1 to 25 weight percent of a second ethylene n-butyl acrylate, wherein the second ethylene n-butyl acrylate comprises 33 to 35 weight percent n-butyl acrylate with a melt index of 40 dg/min. 24. The process according to claim 20 wherein the adhesive comprises: a) 15 to 45% ethylene n-butyl acrylate copolymers having a melt index of at least 200; b) 25 to 55% a-methyl styrene tackifying resins; and c) 15 to 40% of a low melting point paraffin wax. 25. The process according to claim 20 wherein the adhesive comprises: a) from 20 to 40 weight percent of an ethylene/α-olefin copolymer; b) from 20 to 40 weight percent tackifier; and c) from 10 to 40 weight percent wax. 26. The process according to claim 25 wherein the ethylene/α-olefin copolymer has a composition distribution breath index greater than 50% and Mw/Mn less than 6. 27. The process according to claim 25 wherein the ethylene/α-olefin copolymer has a melt index of 40 to 1000 dg/min, a melt point of 71 to 90° C., a density of 0.850 to 0.92, a composition distribution breath index greater than 50%, and Mw/Mn less than 6. 28. The process according to claim 20 wherein the adhesive comprises ethylene vinyl acetate comprising 5 to 45 weight percent vinyl acetate with a melt index of at least 400 dg/min. 29. The process according to claim 20 wherein the adhesive comprises 30 to 60 weight percent polyethylene polymer with melt index of 5000 to 2000 dg/min at 190° C., a density of 0.900 to 0.930, and a softening point less than 110° C. 30. The process according to claim 20 wherein the adhesive comprises blends selected from the group consisting of blends of EnBA and EVA polymers; blends of polyethylene and EVA; blends of poly α-olefin and EVA; and combinations thereof. 31. The process according to claim 20 wherein the adhesive comprises: a) 31 parts paraffin wax with a softening point of 150° F.; b) 21 parts ethylene vinyl acetate copolymer with a melt index of 400 and a vinyl acetate content of 28%; c) 11 parts or ethylene vinyl acetate copolymer with a melt index of 43 and a vinyl acetate content of 28%; d) 37 parts of alpha-methyl styrene tackifying resins; and e) 0.5 parts of an antioxidant stabilizer. 32. The process according to claim 20 wherein the adhesive comprises: a) 50 parts polyethylene; b) 40 parts of an aliphatic-aromatic hydrocarbon tackifying resin; c) 10 parts of a microcrystalline wax with a softening point of 195° F.; and d) 0.2 parts of an antioxidant stabilizer. 33. A cigarette comprising the filter of claim 1.
※ AI-Helper는 부적절한 답변을 할 수 있습니다.