Finely cut paper product for use in mixing with resin, ecologically sound resin composition comprising the same, and ecologically sound molded resin article using the composition

Abstract

An object of the invention is to provide a finely cut paper product exhibiting a good workability in the production of a paper-resin composition comprising a mixture of a resin and a natural fiber, and improve the fluidity of an ecologically sound paper-resin composition using the finely cut paper product, so as to improve the moldability thereof when the composition is subjected to a working such as injection molding. An other object thereof is to restrain the generation of yellowing or the generation of an odor. The finely cut paper product for use in mixing with resin according to the invention is obtained by pulverizing neutral or alkaline pigment-free coated paper which comprises 70 to 100% by mass of hardwood bleached chemical pulp, 0 to 20% by mass of softwood bleached chemical pulp and 0 to 20% by mass of an inorganic filler, and has an ISO brightness of 70% or more. The ecologically sound paper-resin composition comprising it comprises 50% or more by mass of the above-mentioned finely cut paper product for use in mixing with resin, wherein the balance is made mainly of a synthetic resin, or wherein the main component is made of the above-mentioned finely cut paper product for use in mixing with resin and a biodegradable resin.

1 - 7 . (canceled) 
   
   
       8 . A finely cut paper product for use in mixing with resin, comprising being obtained by pulverizing neutral or alkaline pigment-free coated paper which comprises 70 to 100% by mass of hardwood bleached chemical pulp, 0 to 20% by mass of softwood bleached chemical pulp and 0 to 20% by mass of an inorganic filler, and has an ISO brightness of 70% or more. 
   
   
       9 . The finely cut paper product for use in mixing with resin according to  claim 8 , comprising one or more selected from calcium carbonate and talc as the inorganic filler. 
   
   
       10 . The finely cut paper product for use in mixing with resin according to  claim 8 , comprising one or more selected from calcium carbonate and talc as the inorganic filler and having an apparent bulk specific gravity of 0.1 or more. 
   
   
       11 . An ecologically sound paper-resin composition, comprising 50% or more by mass of the finely cut paper product for use in mixing with resin according to  claim 8 , wherein the balance is made mainly of a synthetic resin. 
   
   
       12 . The ecologically sound paper-resin composition according to  claim 11 , wherein the finely cut paper product for use in mixing with resin comprises one or more selected from calcium carbonate and talc as the inorganic filler. 
   
   
       13 . The ecologically sound paper-resin composition according to  claim 11 , wherein the finely cut paper product for use in mixing with resin comprises one or more selected from calcium carbonate and talc as the inorganic filler and has an apparent bulk specific gravity of 0.1 or more. 
   
   
       14 . An ecologically sound paper-resin composition, wherein being made mainly of the finely cut paper product for use in mixing with resin according to  claim 8  and a biodegradable resin. 
   
   
       15 . The ecologically sound paper-resin composition according to  claim 14 , wherein the finely cut paper product for use in mixing with resin comprises one or more selected from calcium carbonate and talc as the inorganic filler. 
   
   
       16 . The ecologically sound paper-resin composition according to  claim 14 , wherein the finely cut paper product for use in mixing with resin comprises one or more selected from calcium carbonate and talc as the inorganic filler and has an apparent bulk specific gravity of 0.1 or more. 
   
   
       17 . The ecologically sound paper-resin composition according to  claim 14 , wherein comprising a rosin-based resin. 
   
   
       18 . The ecologically sound paper-resin composition according to  claim 15 , wherein comprising a rosin-based resin. 
   
   
       19 . The ecologically sound paper-resin composition according to  claim 16 , wherein comprising a rosin-based resin. 
   
   
       20 . An ecologically sound molded article, wherein being molded by use of the ecologically sound paper-resin composition according to  claim 11 . 
   
   
       21 . The ecologically sound molded article according to  claim 20 , wherein the finely cut paper product for use in mixing with resin contained in the ecologically sound paper-resin composition comprises one or more selected from calcium carbonate and talc as the inorganic filler. 
   
   
       22 . The ecologically sound molded article according to  claim 20 , wherein the finely cut paper product for use in mixing with resin contained in the ecologically sound paper-resin composition comprises one or more selected from calcium carbonate and talc as the inorganic filler and has an apparent bulk specific gravity of 0.1 or more. 
   
   
       23 . An ecologically sound molded article, wherein being molded by use of the ecologically sound paper-resin composition according to  claim 14 . 
   
   
       24 . The ecologically sound molded article according to  claim 23 , wherein the finely cut paper product for use in mixing with resin contained in the ecologically sound paper-resin composition comprises one or more selected from calcium carbonate and talc as the inorganic filler. 
   
   
       25 . The ecologically sound molded article according to  claim 23 , wherein the finely cut paper product for use in mixing with resin contained in the ecologically sound paper-resin composition comprises one or more selected from calcium carbonate and talc as the inorganic filler and has an apparent bulk specific gravity of 0.1 or more. 
   
   
       26 . The ecologically sound molded article according to  claim 23 , wherein the ecologically sound paper-resin composition comprises a rosin-based resin. 
   
   
       27 . The ecologically sound molded article according to  claim 24 , wherein the ecologically sound paper-resin composition comprises a rosin-based resin. 
   
   
       28 . The ecologically sound molded article according to  claim 25 , wherein the ecologically sound paper-resin composition comprises a rosin-based resin.