US 11,963,610 B2
Method of manufacturing bamboo toothbrush and bamboo toothbrush manufactured thereby
Kyung Tae Lee, Seoul (KR); Guen Woo Park, Seoul (KR); and Eun Seob Kim, Seoul (KR)
Assigned to PROJECT NOAH, INC., (KR)
Appl. No. 17/422,743
Filed by PROJECT NOAH, INC., Seoul (KR)
PCT Filed Oct. 2, 2019, PCT No. PCT/KR2019/012928
§ 371(c)(1), (2) Date Jul. 13, 2021,
PCT Pub. No. WO2020/149491, PCT Pub. Date Jul. 23, 2020.
Claims priority of application No. 10-2019-0005623 (KR), filed on Jan. 16, 2019.
Prior Publication US 2022/0125192 A1, Apr. 28, 2022
Int. Cl. A46D 3/00 (2006.01); A46B 9/04 (2006.01); B27J 1/00 (2006.01); B27K 5/00 (2006.01)
CPC A46D 3/00 (2013.01) [A46B 9/04 (2013.01); B27J 1/00 (2013.01); B27K 5/007 (2013.01); B27K 5/0085 (2013.01); A46B 2200/1066 (2013.01)] 6 Claims
OG exemplary drawing
 
1. A method of manufacturing a bamboo toothbrush, the method comprising steps of:
a) CNC machining of machining a rod-shaped bamboo into a toothbrush stem shape; and
b) hot pressing of inserting, heating, and pressing the machined bamboo in a press mold,
wherein the heating and pressing in the step b) have conditions of temperature of 100° C. to 220° C., time of 5 minutes to 60 minutes, and pressure of 0.2 MPa to 10 MPa, and
a coating layer is formed on the surface of the bamboo by caramelization of a sugar content in the bamboo under the conditions.