Biodegradable resin composition

Abstract

This invention provides a biodegradable resin composition and a biodegradable molding using the same and in particular, it not only have satisfactory biodegradability, processability and properties required for biodegradable resins by comprising cellulose diacetate as a main component but also can lower manufacturing costs and prevent environmental contamination by preparing the biodegradable resins by reusing a cause factor of environmental contamination.

1 . A biodegradable resin composition comprising a cellulose diacetate as a main component.  
   
   
       2 . The biodegradable resin composition according to  claim 1  wherein the cellulose diacetate is an ethyl cellulose having a molecular weight of 10,000 to 500,000.  
   
   
       3 . The biodegradable resin composition according to  claim 1  wherein the biodegradable resin composition comprises: 
 a) 50 to 90 parts by weight of a cellulose diacetate; and    b) 10 to 50 parts by weight of a plasticizer.    
   
   
       4 . The biodegradable resin composition according to  claim 1  wherein the plasticizer is selected from the group consisting of triacetin (TA), triethyl citrate (TEC), glycerin and a mixture thereof.  
   
   
       5 . The biodegradable resin composition according to  claim 1  wherein the cellulose diacetate is obtained from a waste cigarette filter.  
   
   
       6 . The biodegradable resin composition according to  claim 1  wherein the biodegradable resin composition further comprises a clay mineral, degradation catalyst or processing aid.  
   
   
       7 . The biodegradable resin composition according to  claim 1  wherein the biodegradable resin composition further comprises a natural vegetable fiber.  
   
   
       8 . A biodegradable molding prepared by kneading, extruding and injecting the biodegradable resin composition of  claim 1 .  
   
   
       9 . The biodegradable molding according to  claim 8  wherein the biodegradable molding is a film for semiconductor packaging, container, cup, spoon, fork, knife, toothbrush, straw, paper cup, paper coating for the manufacture of paper plates, mulching film, plant port, clip, garbage bag, compost bag, shrink wrap film, wrapping film, syringe for animal injection, mouthpiece for endoscope, modifier for hard biodegradable plastics, golf tee, fish net, fishing line, bottles or stationery.