Manufacturing method of needle-shaped bristles having short taper length and a toothbrush by same manufacturing method
US8522389B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Nov 29, 2006 |
| Grant date | Sep 3, 2013 |
| Priority date | — |
| Expiry date | Oct 31, 2027 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA46B2200/1066
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
The present invention relates to a method of manufacturing a needle-shaped bristle having a short taper length. The method includes preparing a bundle of toothbrush bristles by mixing a polyester resin (a polyester resin other than a PTT resin) and a PTT resin in a ratio of 90˜40 to 10˜60 and spinning the mixture thereof; cutting the bundle of toothbrush bristles; and tapering the cut bundle of toothbrush bristles by immersing it into a chemical. According to the present invention, since needle-shaped bristles having a taper length of 6 mm or less can be efficiently obtained, the needle-shaped bristles can be implanted even in an anchorless toothbrush.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.