US2020406505A1PendingUtilityA1

Polymer composites

72
Assignee: INT PAPER COPriority: Feb 14, 2012Filed: Sep 16, 2020Published: Dec 31, 2020
Est. expiryFeb 14, 2032(~5.6 yrs left)· nominal 20-yr term from priority
Inventors:Robert T. HamiltonHarshadkumar M. ShahDavid E. FishNeil R. GranlundJeffrey Jacob Cernohous
B29B 9/08B29C 48/385B29C 48/022B29B 9/14B29B 7/92B29C 48/387B29C 48/0022B29C 48/395B29B 7/487B29C 48/04B29C 48/365B29C 48/40B29B 7/60B29B 9/065
72
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Claims

Abstract

A composition including 6 to 50 weight percent wood pulp fiber and 45 to 93.45 weight percent thermoplastic polymer. In some embodiments, the average dispersion of the wood pulp fibers within the thermoplastic polymer is equal to or greater than 90% as determined by the Dispersion Test. In some embodiments, the dilution level for detection in a bang at 40° C. is equal to or less than 450 as determined by ASTM E679. In some embodiments, the composition further includes 0.5 to 5 weight percent of an additive, such as a compatibilizer, a coupling agent, an anti-oxidant, and/or a lubricant. In some embodiments, the wood pulp fiber is bleached chemical wood pulp fiber.

Claims

exact text as granted — not AI-modified
The embodiments of the invention in which an exclusive property or privilege is claimed are defined as follows: 
     
         1 . A composition comprising 6 to 50 weight percent wood pulp fiber and 45 to 93.45 weight percent thermoplastic polymer, wherein the average dispersion of the wood pulp fibers within the thermoplastic polymer is equal to or greater than 90% as determined by the Dispersion Test. 
     
     
         2 . The composition of  claim 1 , further comprising 0.5 to 5 weight percent of an additive, wherein the additive includes one or more additives selected from the group consisting of a compatibilizer, a coupling agent, an anti-oxidant, and a lubricant. 
     
     
         3 . The composition of  claim 2 , wherein the additives comprise a lubricant in the form of mineral oil, and wherein the composition comprises no more than 1.0 weight percent lubricant. 
     
     
         4 . The composition of  claim 1 , wherein the thermoplastic polymer is selected from the group consisting of a biopolymer, a polycarbonate, polyethylene terephthalate, a polyolefin, polystyrene, polystyrene copolymer, acrylonitrile-butadiene-styrene copolymer, a styrene block copolymer, polyvinyl chloride, a polyolefin-graft-maleic anhydride copolymer, a recycled plastic. 
     
     
         5 . The composition of  claim 4 , wherein the thermoplastic polymer comprises a biopolymer selected from the group consisting of polylactic acid, cellulose acetate, cellulose proprionate, and cellulose butyrate. 
     
     
         6 . The composition of  claim 4 , wherein the thermoplastic polymer comprises a polyolefin selected from group consisting of polyethylene, high density polyethylene, low density polyethylene, liner low density polyethylene, and polypropylene. 
     
     
         7 . The composition of  claim 1 , wherein the thermoplastic polymer is selected from the group consisting of a polyolefin, polystyrene, a polystyrene copolymer, a styrene block copolymer, polyvinyl chloride, and one or more of the aforementioned thermoplastic polymers in recycled plastic form. 
     
     
         8 . The composition of  claim 7 , wherein the thermoplastic polymer comprises polyolefin selected from the group consisting of polyethylene, high density polyethylene, low density polyethylene, liner low density polyethylene, and polypropylene. 
     
     
         9 . The composition of  claim 1 , wherein the wood pulp fiber is bleached chemical wood pulp fiber. 
     
     
         10 . The composition of  claim 1 , wherein the average dispersion of the wood pulp fibers within the thermoplastic polymer is equal to or greater than 95% as determined by the Dispersion Test. 
     
     
         11 . The composition of  claim 1 , wherein the average dispersion of the wood pulp fibers within the thermoplastic polymer is equal to or greater than 98% as determined by the Dispersion Test. 
     
     
         12 . The composition of  claim 1 , comprising 6 to 10 weight percent pulp fiber and 85 to 93.45 weight percent thermoplastic polymer. 
     
     
         13 . The composition of  claim 12 , further comprising 0.5 to 1.0 weight percent additives, wherein the additives include one or more additives selected from the group consisting of a compatibilizer, a coupling agent, an anti-oxidant, and a lubricant. 
     
     
         14 . The composition of  claim 1 , wherein the dilution level for detection in a bag at 40° C. is equal to or less than 450 as determined by ASTM E679. 
     
     
         15 . The composition of  claim 1 , comprising no more than 5.0 weight percent mineral oil. 
     
     
         16 . The composition of  claim 15 , comprising no more than 1.0 weight percent mineral oil. 
     
     
         17 . A composition comprising 6 to 50 weight percent wood pulp fiber and 45 to 93.45 weight percent thermoplastic polymer,
 wherein the thermoplastic polymer is selected from the group consisting of a polyolefin, polystyrene, a polystyrene copolymer, a styrene block copolymer, polyvinyl chloride, and one or more of the aforementioned thermoplastic polymers in recycled plastic form, and   wherein the average dispersion of the wood pulp fibers within the thermoplastic polymer is equal to or greater than 90% as determined by the Dispersion Test.   
     
     
         18 . The composition of  claim 17 , further comprising 0.5 to 5 weight percent additives, wherein the additives include one or more additives selected from the group consisting of a compatibilizer, a coupling agent, an anti-oxidant, and a lubricant. 
     
     
         19 . The composition of  claim 17 , wherein the thermoplastic polymer comprises a polyolefin selected from the group consisting of polyethylene, high density polyethylene, low density polyethylene, linear low density polyethylene, and polypropylene. 
     
     
         20 . The composition of  claim 17 , wherein the average dispersion of the wood pulp fibers within the thermoplastic polymer is equal to or greater than 95% as determined by the Dispersion Test. 
     
     
         21 . The composition of  claim 17 , wherein the average dispersion of the wood pulp fibers within the thermoplastic polymer is equal to or greater than 98% as determined by the Dispersion Test. 
     
     
         22 . A composition comprising 6 to 50 weight percent wood pulp fiber and 45 to 93.45 weight percent thermoplastic polymer, wherein the dilution level for detection in a bag at 40° C. is equal to or less than 450 as determined by ASTM E679. 
     
     
         23 . The composition of  claim 22 , further comprising 0.5 to 5 weight percent additives, wherein the additives include one or more additives selected from the group consisting of a compatibilizer, a coupling agent, an anti-oxidant, and a lubricant. 
     
     
         24 . The composition of  claim 22 , wherein the thermoplastic polymer is selected from the group consisting of a biopolymer, a polycarbonate, polyethylene terephthalate, a polyolefin, polystyrene, a polystyrene copolymer, acrylonitrile-butadiene-styrene copolymer, a styrene block copolymer, polyvinyl chloride, a polyolefin-graft-maleic anhydride copolymer, and a recycled plastic. 
     
     
         25 . The composition of  claim 24 , wherein polymer comprises a biopolymer selected from the group consisting of polylactic acid, cellulose acetate, cellulose proprionate, and cellulose butyrate. 
     
     
         26 . The composition of  claim 24 , wherein the thermoplastic polymer comprises a polyolefin selected from the group consisting of polyethylene, high density polyethylene, low density polyethylene, linear low density polyethylene, and polypropylene. 
     
     
         27 . The composition of  claim 22 , wherein the thermoplastic polymer is selected from the group consisting of a polyolefin, polystyrene, a polystyrene copolymer, a styrene block copolymer, polyvinyl chloride, and one or more of the aforementioned thermoplastic polymers in recycled plastic form. 
     
     
         28 . The composition of  claim 27 , wherein the thermoplastic polymer comprises a polyolefin selected from the group consisting of polyethylene, high density polyethylene, low density polyethylene, linear low density polyethylene, and polypropylene. 
     
     
         29 . The composition of  claim 22 , wherein the wood pulp fiber is bleached chemical wood pulp fiber. 
     
     
         30 . The composition of  claim 22 , wherein the dilution level for detection in a bag at 40° C. is equal to or less than 400 as determined by ASTM E679. 
     
     
         31 . The composition of  claim 22 , wherein the dilution level for detection in a bag at 10° C. is equal to or less than 350 as determine by ASTM E679. 
     
     
         32 . The composition of  claim 22 , comprising 6 to 10 weight percent wood pulp fiber and 85 to 93.45 weight percent thermoplastic polymer. 
     
     
         33 . The composition  claim 32 , further comprising 0.5 to 1.0 weight percent additives, wherein the additives include one or more additives selected from the group consisting of a compatibilizer, a coupling agent, an anti oxidant, and a lubricant. 
     
     
         34 . The composition of  claim 22 , wherein the average dispersion of the wood pulp fibers within the thermoplastic polymer is equal to or greater than 90% as determined by the Dispersion Test. 
     
     
         35 . The composition of  claim 22 , comprising no more than 5.0 weight percent mineral oil. 
     
     
         36 . The composition of  claim 35 , comprising no more than 1.0 weight percent mineral oil.

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