Analysis of Patent Application of Corn Plastic (Polylactic Acid) (III)

11. Title: Bag for clothes

Source: JP2002293961A (Application Date: 2001.03.30, Public Day: 2002.10.09)

Applicant: UNITIKA LTD

The purpose of this patent is to provide a pocket that does not pollute the environment and does not generate pollution even when disposed of such as landfill or burn. Its novelty is that the bag has a biodegradable film and the film contains polylactic acid and a fat/aromatic copolyester.

Uses: can be used as laundry bag, hanging clothes bag, or clothing set

12. Title: BIODEGRADABLE BAG WITH FASTENER

Source: JP2002293961A (filing date: 1996.11.15, publication date: 1998.06.02)

Applicant: MITSUBISHI PLASTICS IND LTD; NITTO PACK KK; SHOWA DENKO KK; SHOWA HIGH POLYMER CO LTD

The purpose of this patent is to provide a good heat-sealable, transparent, biodegradable, buttoned bag. The bag contains an inner film, an outer film and a button; the inner film consists of polylactic acid and an aliphatic polyester. Where the basic structure of the aliphatic polyester is as follows, formula (I), the average molecular weight is from 30,000 to 150,000, or the structure of the aliphatic polyester polyester is as in formula (I) and includes a urethane bond, the molecular weight is the same as above; the outer layer film includes Directional polylactic acid polymers, the buttons mainly include aliphatic polyesters, the structural formula is (I), or further include urethane bonds in the molecule, the average molecular weight is 30000-150000, the buttons are connected with the inner layer film, and the structural formula (I) Is: -(C(O)-R1-C(O)-O-R2-O-)n, wherein R1 and R2 = 2-10C alkylene, cycloalkylene, n is the degree of polymerization.

Uses: The biodegradable bags with buttons can be used for fishing, agriculture, construction and medical packaging.

13. Title: A CONTAINER PROVIDED WITH A ZIPPER OF A BIODEGRADABLE MATERIAL AND A ZIPPER THEREFOR

Source: WO9915128 (filing date: 1998.09.21, publication date: 1999.04.01)

Equivalent Patents: NL1007091, AU9893667, EP1017349

Applicant: JonKER JC

The biodegradable flexible container disclosed in this patent is airtight and has a zipper made of a biodegradable material. Zippers and containers are all made of polymers, injection molded or extruded. The container obtained from this patent can be used as a cadaver bag. The advantage is that the body bag does not release harmful gases to the environment when it is burned.

14. Title: Resin Component and Biodegradable Draining Bag (RESIN COMPOSITION AND BIODEGRADABLE DRAINING BAG)

Source: JP2001089649 (filing date: 1999.09.22, publication date: 2001.04.03)

Applicant: RIKEN VINYL INDUSTRY CO LTD

The purpose of this patent is to provide a drainage bag with excellent practicality, formability and post-treatment, biodegradation within compost at an appropriate rate. The resin component mentioned in this invention is prepared by adding a lubricant to a biodegradable linear aliphatic polyester resin, a biodegradable linear aliphatic polyester resin, and a polylactic acid resin. The drainage bag referred to in the present invention is prepared by using a highly biodegradable mesh or plate made of the above resin.

15. Title: BIODEGRADABLE FILM AND BIODEGRADABLE BAG USING THE FILM

Source: JP2001031134 (filing date: 1999.07.15, publication date: 2001.02.06)

Applicant: KIMOTO & CO LTD

The purpose of this patent is to use a bag made of a biodegradable film combined with activated carbon to treat raw litter and feces to prevent odor generation. The film of the invention is made of a biodegradable plastic, wherein the biodegradable plastic is prepared by using polylactic acid, polyhydroxyalkanoate, lactone resin, aliphatic polyester resin (such as low molecular weight aliphatic dicarboxylic acid and A low-molecular-weight aliphatic diol is obtained), a modified starch, a modified polyvinyl alcohol, etc.; in addition, the biodegradable plastic is melted by kenaf and kneaded with the activated carbon, and the above mixture is granulated and made into a thin film, which is then used to obtain a Biodegradable films produce biodegradable bags. The proportion of biodegradable plastic and activated carbon is not limited, but the amount of activated carbon needs to be limited to 2-70% by weight of biodegradable plastic, preferably 5-30% by weight.