US2006172137A1PendingUtilityA1

Transverse-direction, elastomeric, breathable film

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Individually held — no corporate assignee on recordPriority: Feb 1, 2005Filed: Feb 1, 2005Published: Aug 3, 2006
Est. expiryFeb 1, 2025(expired)· nominal 20-yr term from priority
Inventors:William Champion
B32B 27/18B32B 27/08B32B 27/302B32B 27/32B32B 2250/24B32B 2250/40B32B 2264/104B32B 2307/51B32B 2307/724B32B 2307/7265B32B 2307/736B32B 2555/02B32B 2309/14Y10T428/31917Y10T428/3154Y10T428/31913Y10T428/249986Y10T428/31909Y10T428/31928Y10T428/24998Y10T428/31931Y10T428/31938Y10T428/3192
36
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Claims

Abstract

The present invention provides a multilayer film preferably comprising two skin layers, each preferably comprising low density polyethylene, two outer core layers, preferably comprising an additive and a styrene block copolymer, and an inner core layer preferably comprising an additive and a styrene block copolymer.

Claims

exact text as granted — not AI-modified
1 . A multilayer film comprising: 
 a first layer comprising at least one polyolefin polymer; and    a second layer comprising an additive, and at least one polymer compound selected from the group consisting of high performance thermoplastic rubber, polyolefin polymers, ethylene copolymer resins, styrene block copolymers, fluoropolymers, polyvinylchloride, and mixtures thereof.    
     
     
         2 . The film of  claim 1  wherein said polymer compound of said second layer comprises a metallocence-catalyzed polymer.  
     
     
         3 . The film of  claim 1  wherein said additive is a neutralizer.  
     
     
         4 . The film of  claim 3  wherein said additive is calcium carbonate.  
     
     
         5 . A multilayer film comprising: 
 a first skin layer comprising at least one polyolefin polymer;    a core layer comprising an additive, and at least one polymer compound selected from the group consisting of high performance thermoplastic rubber, polyolefin polymers, ethylene copolymer resins, styrene block copolymers, fluoropolymers, polyvinylchloride, and mixtures thereof; and    a second skin layer comprising at least one polyolefin polymer,    wherein said core layer is situated between said first skin layer and said second skin layer.    
     
     
         6 . The film of  claim 5  wherein said additive is a neutralizer.  
     
     
         7 . The film of  claim 6  wherein said additive is calcium carbonate.  
     
     
         8 . The film of  claim 4  wherein said core layer comprises: 
 a first outer core layer comprising an additive, and at least one polymer compound selected from the group consisting of polyolefin polymers, ethylene copolymer resins, styrene block copolymers, fluoropolymers, polyvinylchloride, and mixtures thereof, wherein said at least one polymer compound is a metallocene-catalyzed polymer,    an inner core layer comprising an additive, and at least one polymer compound selected from the group consisting of high performance thermoplastic rubber, polyolefin polymers, ethylene copolymer resins, styrene block copolymers, fluoropolymers, polyvinylchloride, and mixtures thereof; and    a second outer core layer comprising an additive, and at least one polymer compound selected from the group consisting of polyolefin polymers, ethylene copolymer resins, styrene block copolymers, fluoropolymers, polyvinylchloride, and mixtures thereof, wherein said at least one polymer compound is a metallocene-catalyzed polymer,    wherein said inner core layer is situated between said first out core layer and said second out core layer.    
     
     
         9 . The film of  claim 8  wherein the additive comprising said inner core layer and said first and second outer core layers is a neutralizer.  
     
     
         10 . The film of  claim 9  wherein the additive comprising said inner core layer and said first and second outer core layers is calcium carbonate.  
     
     
         11 . A multilayer film comprising: 
 a first skin layer comprising at least one polyolefin polymer;    a first outer core layer comprising an additive and further comprising a styrene block copolymer;    an inner core layer comprising an additive and further comprising a styrene block copolymer;    a second outer core layer comprising an additive and further comprising a styrene block copolymer; and    a second skin layer comprising at least one polyolefin polymer,    wherein said inner core layer is situated between said first and second outer core layers, and wherein said first and second outer core layers are situated between said first and second skin layers.    
     
     
         12 . The multilayer film of  claim 11  wherein the at least one polyolefin polymer in said first and second skin layers includes low density polyethylene.  
     
     
         13 . The multilayer film of  claim 12  wherein said first and second outer core layers further include a metallocene-catalyzed polyolefin polymer.  
     
     
         14 . The multilayer film of  claim 13  wherein the additive in said inner core layer and said first and second outer core layers includes calcium carbonate.  
     
     
         15 . The multilayer film of  claim 11  wherein the additive in said inner core layer and said first and second outer core layers includes calcium carbonate.  
     
     
         16 . The multilayer film of  claim 12  wherein the styrene block copolymer of said first and second outer core layers includes styrene-ethylene/butylene-styrene elastomer.  
     
     
         17 . The multilayer film of  claim 16  wherein said first and second outer core layers further include a metallocence-catalyzed polyolefin polymer.  
     
     
         18 . The multilayer film of  claim 17  wherein the additive in said inner core layer and said first and second outer core layers includes calcium carbonate.  
     
     
         19 . The multilayer film of  claim 16  wherein the additive in said inner core layer and said first and second outer core layers includes calcium carbonate.  
     
     
         20 . The multilayer film of  claim 16  wherein the styrene block copolymer of said inner core layer includes styrene-ethylene/butylene-styrene elastomer.  
     
     
         21 . The multilayer film of  claim 20  wherein said first and second outer core layers further include a metallocence-catalyzed polyolefin polymer.  
     
     
         22 . The multilayer film of  claim 21  wherein the additive in said inner core layer and said first and second outer core layers includes calcium carbonate.  
     
     
         23 . The multilayer film of  claim 20  wherein the additive in said inner core layer and said first and second outer core layers includes calcium carbonate.  
     
     
         24 . The multilayer film of  claim 11  wherein the styrene block copolymer of said first and second outer cores includes styrene-ethylene/butylene-styrene elastomer.  
     
     
         25 . The multilayer film of  claim 24  wherein said first and second outer core layers further include a metallocence-catalyzed polyolefin polymer.  
     
     
         26 . The multilayer film of  claim 25  wherein the additive in said inner core layer and said first and second outer core layers includes calcium carbonate.  
     
     
         27 . The multilayer film of  claim 24  wherein the additive in said inner core layer and said first and second outer core layers includes calcium carbonate.  
     
     
         28 . The multilayer film of  claim 24  wherein the styrene block copolymer of said inner core layer includes styrene-ethylene/butylene-styrene elastomer.  
     
     
         29 . The multilayer film of  claim 28  wherein said first and second outer core layers further include a metallocence-catalyzed polyolefin polymer.  
     
     
         30 . The multilayer film of  claim 29  wherein the additive in said inner core layer and said first and second outer core layers includes calcium carbonate.  
     
     
         31 . The multilayer film of  claim 28  wherein the additive in said inner core layer and said first and second outer core layers includes calcium carbonate.  
     
     
         32 . The multilayer film of  claim 11  wherein the styrene block copolymer of said inner core layer includes styrene-ethylene/butylene-styrene elastomer.  
     
     
         33 . The multilayer film of  claim 32  wherein said first and second outer core layers further include a metallocence-catalyzed polyolefin polymer.  
     
     
         34 . The multilayer film of  claim 33  wherein the additive in said inner core layer and said first and second outer core layers includes calcium carbonate.  
     
     
         35 . The multilayer film of  claim 32  wherein the additive in said inner core layer and said first and second outer core layers includes calcium carbonate.  
     
     
         36 . The multilayer film of  claim 12  wherein the styrene block copolymer of said inner core layer includes styrene-ethylene/butylene-styrene elastomer.  
     
     
         37 . The multilayer film of  claim 36  wherein said first and second outer core layers further include a metallocence-catalyzed polyolefin polymer.  
     
     
         38 . The multilayer film of  claim 37  wherein the additive in said inner core layer and said first and second outer core layers includes calcium carbonate.  
     
     
         39 . The multilayer film of  claim 36  wherein the additive in said inner core layer and said first and second outer core layers includes calcium carbonate.  
     
     
         40 . The multilayer film of  claim 11  wherein said first and second skin layers comprise from about 2% to about 4% by weight of said film.  
     
     
         41 . The multilayer film of  claim 11  wherein said inner and outer core layers comprise from about 36% to about 45% by weight of said film.  
     
     
         42 . The multilayer film of  claim 11  wherein said inner core layer comprises from about 48% to about 60% by weight of said film.  
     
     
         43 . The multilayer film of  claim 20  wherein said first and second skin layers comprise from about 2% to about 4% by weight of said film.  
     
     
         44 . The multilayer film of  claim 20  wherein said inner and outer core layers comprise from about 36% to about 45% by weight of said film.  
     
     
         45 . The multilayer film of  claim 20  wherein said inner core layer comprises from about 48% to about 60% by weight of said film.  
     
     
         46 . The multilayer film of  claim 11  wherein the additive in said first and second outer core layers and said inner core layer comprises calcium carbonate.  
     
     
         47 . The multilayer film of  claim 11  wherein said first and second skin layers further comprise at least one additive selected from the group consisting of antioxidants and anti-blocking agents.  
     
     
         48 . The multilayer film of  claim 20  wherein said first and second skin layers further comprise at least one additive selected from the group consisting of antioxidants and anti-blocking agents.  
     
     
         49 . A multilayer film comprising: 
 a first skin layer comprising low density polyethylene;    a first outer core layer comprising calcium carbonate, styrene-ethylene/butylene-styrene elastomer, and metallocene-catalyzed linear low-density polyethylene;    an inner core layer comprising calcium carbonate and styrene-ethylene/butylene-styrene elastomer;    a second outer core layer comprising calcium carbonate, styrene-ethylene/butylene-styrene elastomer, and metallocene-catalyzed linear low-density polyethylene; and    a second skin layer comprising low density polyethylene,    wherein said inner core layer is situated between said first and second outer core layers, and wherein said first and second outer core layers are situated between said first and second skin layers.    
     
     
         50 . The multilayer film of  claim 49  wherein said first and second skin layers further include at least one additive selected from the group consisting of antioxidants and antiblocking agents.  
     
     
         51 . The multilayer film of  claim 49  wherein said first and second skin layers each comprise from about 1% to about 2%, by weight, of said film, said first and second outer core layers each comprise from about 18% to about 24%, by weight, of said film, and said inner core layer comprises from about 48% to about 60%, by weight, of said film.

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