US 12,420,319 B2
Biodegradable composite and product containing biodegradable composite
Chung-King Hsu, Taipei (TW)
Assigned to Chung-King Hsu, Taipei (TW); Jui-Tsai Wang, Taipei (TW); Shu-Tang Chang, Taichung (TW); and Hung-Ching Chang, Changhua (TW)
Filed by Chung-King Hsu, Taipei (TW); Jui-Tsai Wang, Taipei (TW); Shu-Tang Chang, Taichung (TW); and Hung-Ching Chang, Changhua County (TW)
Filed on Jul. 19, 2021, as Appl. No. 17/379,791.
Claims priority of application No. 110114453 (TW), filed on Apr. 22, 2021.
Prior Publication US 2022/0339681 A1, Oct. 27, 2022
Int. Cl. B09B 3/00 (2022.01); B09B 101/20 (2022.01); C05F 9/04 (2006.01); C05F 11/08 (2006.01); C08L 67/04 (2006.01); C12N 1/20 (2006.01); D21H 17/00 (2006.01); D21H 21/14 (2006.01); D21H 27/00 (2006.01)
CPC B09B 3/00 (2013.01) [C05F 9/04 (2013.01); C05F 11/08 (2013.01); C08L 67/04 (2013.01); D21H 17/005 (2013.01); D21H 21/14 (2013.01); D21H 27/00 (2013.01); B09B 2101/20 (2022.01); C08L 2201/06 (2013.01); C12N 1/20 (2013.01); Y02W 30/40 (2015.05)] 4 Claims
 
1. A product adapted to contact a biological substrate, comprising:
a biodegradable composite consisting of viable bacteria, a porous material, and water; and
a biodegradable plastic that is decomposable by biological activities, covers and contacts with the biodegradable composite, wherein the biodegradable plastic comprises polylactic acid;
wherein the product comprises less than or equal to 10% by weight of the biodegradable composite;
wherein the viable bacteria accounts for 40% to 80% of a weight of the biodegradable composite, and a total plate count of the viable bacteria is greater than or equal to 104 CFU/g;
wherein the porous material is selected from a group consisting of activated carbon, egg-shell powder, shell powder, bamboo charcoal powder and a combination thereof; and accounts for 20% to 60% of the weight of the biodegradable composite;
wherein the viable bacteria is solid and a weight ratio of the viable bacteria to the porous material is 1:1;
wherein the viable bacteria are selected from the group consisting of thermoduric bacteria, Bacillus thuringiensis, Pseudomonas putida, Actinobacteria, and a combination thereof;
wherein the water accounts for 1% to 3% of the weight of the biodegradable composite.