US2023331968A1PendingUtilityA1

Composite polymer

82
Assignee: INT PAPER COPriority: Feb 14, 2012Filed: Nov 21, 2022Published: Oct 19, 2023
Est. expiryFeb 14, 2032(~5.5 yrs left)· nominal 20-yr term from priority
Inventors:Robert T. HamiltonHarshadkumar M. ShahJeffrey Jacob CernohousNeil R. GranlundDavid E. Fish
C08L 23/12C08J 5/045C08L 53/00C08L 55/02C08L 97/02C08L 2205/16B29B 7/92B29B 7/7461B29B 7/42B29B 7/48B29B 7/748B29B 9/065B29B 7/726B29B 9/08B29B 9/12
82
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Claims

Abstract

A composition comprising 10 to 50 wt% wood pulp fiber and 45 to 85 wt% 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.

Claims

exact text as granted — not AI-modified
1 . A composition comprising 10 to 50 weight% diced bleached chemical wood pulp fiber particles and 45 to 85 weight% thermoplastic polymer, wherein the fiber particles have fibers with an average fiber length of at least 1 mm, and wherein a dilution level for odor detection in a bag at 40° C. is equal to or less than 450 as determined by ASTM E679. 
     
     
         2 . The composition of  claim 1 , wherein the thermoplastic polymer is selected from the group consisting of biopolymers, polylactic acid, cellulose acetate, cellulose propionate, cellulose butyrate, polycarbonates, polyethylene terephthalate, polyolefins, polyethylene, high density polyethylene, low density polyethylene, linear low density polyethylene, polypropylene, polystyrene, polystyrene copolymers, acrylonitrile-butadiene-styrene copolymer, styrene block copolymers, polyvinyl chloride, polyacetals, and recycled plastics. 
     
     
         3 . The composition of  claim 1 , wherein the diced bleached chemical wood pulp fiber particles are 20 to 40 weight %, and the thermoplastic polymer is 55 to 75 weight %, of the composition. 
     
     
         4 . The composition of  claim 3 , wherein the thermoplastic polymer is selected from the group consisting of biopolymers, polylactic acid, cellulose acetate, cellulose propionate, cellulose butyrate, polycarbonates, polyethylene terephthalate, polyolefins, polyethylene, high density polyethylene, low density polyethylene, linear low density polyethylene, polypropylene, polystyrene, polystyrene copolymers, acrylonitrile-butadiene-styrene copolymer, styrene block copolymers, polyvinyl chloride, polyacetals, and recycled plastics. 
     
     
         5 . The composition of  claim 1 , wherein the dilution level for odor detection in a bag at 40° C. is equal to or less than 400 as determined by ASTM E679. 
     
     
         6 . The composition of  claim 5 , wherein the thermoplastic polymer is selected from the group consisting of biopolymers, polylactic acid, cellulose acetate, cellulose propionate, cellulose butyrate, polycarbonates, polyethylene terephthalate, polyolefins, polyethylene, high density polyethylene, low density polyethylene, linear low density polyethylene, polypropylene, polystyrene, polystyrene copolymers, acrylonitrile-butadiene-styrene copolymer, styrene block copolymers, polyvinyl chloride, polyacetals, and recycled plastics. 
     
     
         7 . The composition of  claim 5 , wherein the composition comprises 20 to 40 weight % diced bleached chemical wood pulp fiber particles and 55 to 75 weight % of thermoplastic polymer. 
     
     
         8 . The composition of  claim 7 , wherein the thermoplastic polymer is selected from the group consisting of biopolymers, polylactic acid, cellulose acetate, cellulose propionate, cellulose butyrate, polycarbonates, polyethylene terephthalate, polyolefins, polyethylene, high density polyethylene, low density polyethylene, linear low density polyethylene, polypropylene, polystyrene, polystyrene copolymers, acrylonitrile-butadiene-styrene copolymer, styrene block copolymers, polyvinyl chloride, polyacetals, and recycled plastics. 
     
     
         9 . The composition of  claim 1 , wherein the dilution level for odor detection in a bag at 40° C. is equal to or less than 350 as determined by ASTM E679. 
     
     
         10 . The composition of  claim 9 ,wherein the thermoplastic polymer is selected from the group consisting of biopolymers, polylactic acid, cellulose acetate, cellulose propionate, cellulose butyrate, polycarbonates, polyethylene terephthalate, polyolefins, polyethylene, high density polyethylene, low density polyethylene, linear low density polyethylene, polypropylene, polyslyrene, polystyrene copolymers, acrylonitrile-butadicne-styrene copolymer, styrene block copolymers, polyvinyl chloride, polyacetals, and recycled plastics. 
     
     
         11 . The composition of  claim 9 , wherein the composition comprises 20 to 40 weight % diced bleached chemical wood pulp fiber particles and 55 to 75 weight % of thermoplastic polymer. 
     
     
         12 . The composition of  claim 11 , wherein the thermoplastic polymer is selected from the group consisting of biopolymers, polylactic acid, cellulose acetate, cellulose propionate, cellulose butyrate, polycarbonates, polyethylene terephthalate, polyolefins, polyethylene, high density polyethylene, low density polyethylene, linear low density polyethylene, polypropylene, polystyrene, polystyrene copolymers, acrylonitrile-butadiene-styrene copolymer, styrene block copolygners, polyvinyl chloride, polyacetals, and recycled plastics. 
     
     
         13 . The composition of  claim 1 ,wherein the diced bleached chemical wood pulp fiber particles and thermoplastic polymer collectively make up at least 80 weight% of the composition. 
     
     
         14 . The composition of  claim 1 , wherein the diced bleached chemical wood pulp fiber particles and thermoplastic polymer collectively make up at least 85 weight% of the composition. 
     
     
         15 . The composition of  claim 1 , wherein the diced bleached chemical wood pulp fiber particles and thermoplastic polymer collectively make up at least 90 weight% of the composition. 
     
     
         16 . The composition of  claim 1 , wherein the composition comprises 0.2 to 10 weight % compatibilizer or coupling agent. 
     
     
         17 . The composition of  claim 1 ,
 wherein the thermoplastic polymer comprises a polyolefin,   wherein the composition comprises a compatibilizer, and   wherein the compatibilizer includes a polyolefin-graft-maleic anhydride copolymer.   
     
     
         18 . The composition of  claim 1 ,wherein the diced bleached chemical wood pulp fiber particles have a hexagonal shape, a triangular shape, a rectangular shape, or a pentagonal shape. 
     
     
         19 . The composition of  claim 1 , wherein the diced bleached chemical wood pulp fiber particles have a hexagonal shape. 
     
     
         20 . A composition consisting of 10 to 50 weight% diced bleached chemical wood pulp fiber particles, 45 to 85 weight% thermoplastic polymer, and 0.5 to 20 weight% additives; wherein the fiber particles have fibers with an average fiber length of at least 1 mm; wherein the additives consist of one or more compatibilizers, coupling agents, anti-oxidants, and lubricants; and wherein a dilution level for odor detection in a bag at 40° C. is equal to or less than 450 as determined by ASTM E679. 
     
     
         21 . The composition of  claim 20 , wherein the thermoplastic polymer is selected from the group consisting of biopolymers, polylactic acid, cellulose acetate, cellulose propionate, cellulose butyrate, polycarbonates, polyethylene terephthalate, polyolefins, polyethylene, high density polyethylene, low density polyethylene, linear low density polyethylene, polypropylene, polystyrene, polystyrene copolymers, acrylonitrile-butadiene-styrene copolymer, styrene block copolymers, polyvinyl chloride, polyacetals, and recycled plastics. 
     
     
         22 . The composition of  claim 20 , consisting of 20 to 40 weight% diced bleached chemical wood pulp fiber particles, 45 to 75 weight% thermoplastic polymer, and 0.5 to 20 weight% additives. 
     
     
         23 . The composition of  claim 20 , wherein the diced bleached chemical wood pulp fiber particles have a hexagonal shape, a triangular shape, a rectangular shape, or a pentagonal shape. 
     
     
         24 . The composition of  claim 20 , wherein the diced bleached chemical wood pulp fiber particles have a hexagonal shape.

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