Elastomer composition, method for producing the same, and eraser using the same
AssigneeSeed Co., Ltd.
InventorsKazuki Morimoto, Yasuhiro Nishioka
Life of this patent
Estimating the term…
Abstract
An elastomer composition is provided which contains a matrix of poly-(3-hydroxybutyrate-co-3-hydroxyhexanoate) produced from microorganisms and crosslinked natural rubber particles dispersed like islands in the matrix. An eraser using the elastomer composition is also provided. The present invention is capable of providing an elastomer composition and eraser using the same, which can be recycled, are friendly to the environment, and corresponds to the recycling society, without relying on fossil resources.
Claims24
An eraser made of an elastomer composition containing a matrix of a biomass plastic and crosslinked natural rubber particles dispersed like islands in the matrix of the biomass plastic,
- wherein the elastomer composition is an eraser composition containing 50 to 99% by weight of natural rubber, 50 to 1% by weight of the biomass plastic, and 0.1 to 5 parts by weight of a rubber crosslinking agent to 100 parts by weight of the natural rubber, and wherein the biomass plastic is at least one kind of compound selected from polylactic acid, polybutylene succinate, polyamide 11, poly-3-hydroxybutyrate, cellulose acetate, esterified starch, chitosan-cellulose-starch and starch-modified polyvinyl alcohol.
An eraser comprising an elastomer containing a matrix of a biomass plastic and crosslinked natural rubber particles dispersed like islands in the matrix and a vinyl chloride resin,
- wherein the elastomer is an elastomer eraser composition containing 50 to 99% by weight of natural rubber, 50 to 1% by weight of the biomass plastic, and 0.1 to 5 parts by weight of a rubber crosslinking agent to 100 parts by weight of the natural rubber, and wherein the biomass plastic is at least one kind of compound selected from polylactic acid, polybutylene succinate, polyamide 11, poly-3-hydroxybutyrate, cellulose acetate, esterified starch, chitosan-cellulose-starch and starch-modified polyvinyl alcohol.
A method for producing an eraser comprising the steps of;
- melting and kneading an eraser of an elastomer eraser composition and an eraser of a vinyl chloride resin eraser composition, and
- molding the kneaded mixture, wherein the elastomer eraser composition is an elastomer eraser composition containing 50 to 99% by weight of natural rubber, 50 to 1% by weight of a biomass plastic, and 0.1 to 5 parts by weight of a rubber crosslinking agent to 100 parts by weight of the natural rubber, and wherein the biomass plastic is at least one kind of compound selected from polylactic acid, polybutylene succinate, polyamide 11, poly-3-hydroxybutyrate, cellulose acetate, esterified starch, chitosan-cellulose-starch and starch-modified polyvinyl alcohol.
Dependencies are inferred from the claim text.