US2021153641A1PendingUtilityA1

Makeup brush bristle material and makeup brush using said bristle material

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Assignee: TAIKI CORP LTDPriority: Dec 5, 2017Filed: Dec 4, 2018Published: May 27, 2021
Est. expiryDec 5, 2037(~11.4 yrs left)· nominal 20-yr term from priority
Inventors:Wataru EnomotoShoko Ichii
D01F 6/62D01D 5/253A46B 9/021A46D 1/0269A46B 2200/1046A46D 1/0276A46D 1/0207A46D 1/0292A46D 1/0238D02G 3/26D10B 2509/00D10B 2331/04D02G 3/02D02G 3/44
57
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Claims

Abstract

An object is to provide a makeup brush bristle material and a makeup brush bristle material assembly, both made of synthetic resin, as well as a makeup brush using such bristle material or bristle material assembly, all offering good uptake and release properties with respect to powder or liquid cosmetics. As a solution, a makeup brush bristle material constituted by S-twisted or Z-twisted synthetic resin monofilaments, characterized in that the cross-section of the monofilaments in the direction orthogonal to the axis of fiber has a cocoon shape, is provided.

Claims

exact text as granted — not AI-modified
1 . A makeup brush bristle material constituted by S-twisted or Z-twisted monofilaments made of a synthetic resin, characterized in that a cross-section of the monofilaments in a direction orthogonal to an axis of fiber has a cocoon shape which is an oblong with an obtusely constricted center portion. 
     
     
         2 . The makeup brush bristle material according to  claim 1 , characterized in that the monofilament has a narrow tip part having a tapered shape. 
     
     
         3 . The makeup brush bristle material according to  claim 2 , characterized in that the narrow tip part having a tapered shape is branched. 
     
     
         4 . The makeup brush bristle material according to  claim 1 , characterized in that the synthetic resin is a polyester resin. 
     
     
         5 . The makeup brush bristle material according to  claim 4 , characterized in that the polyester resin consists of one or two or more types selected from polytrimethylene terephthalate, polyethylene terephthalate, and polybutylene terephthalate. 
     
     
         6 . A makeup brush bristle material assembly constituted by a mixed assembly of S-twisted and Z-twisted monofilaments made of a synthetic resin, characterized in that a cross-section of the monofilaments in a direction orthogonal to an axis of fiber has a cocoon shape. 
     
     
         7 . A makeup brush characterized by using, at least partially, the makeup brush bristle material according to  claim 1 . 
     
     
         8 . The makeup brush bristle material according to  claim 2 , characterized in that the synthetic resin is a polyester resin. 
     
     
         9 . A makeup brush characterized by using, at least partially, the makeup brush bristle material according to  claim 2 . 
     
     
         10 . The makeup brush bristle material according to  claim 3 , characterized in that the synthetic resin is a polyester resin. 
     
     
         11 . A makeup brush characterized by using, at least partially, the makeup brush bristle material according to  claim 3 . 
     
     
         12 . A makeup brush characterized by using, at least partially, the makeup brush bristle material according to  claim 4 . 
     
     
         13 . A makeup brush characterized by using, at least partially, the makeup brush bristle material according to  claim 5 . 
     
     
         14 . A makeup brush characterized by using, at least partially, the makeup brush bristle material according to  claim 6 . 
     
     
         15 . The makeup brush bristle material according to  claim 8 , characterized in that the polyester resin consists of one or two or more types selected from polytrimethylene terephthalate, polyethylene terephthalate, and polybutylene terephthalate. 
     
     
         16 . A makeup brush characterized by using, at least partially, the makeup brush bristle material according to  claim 8 . 
     
     
         17 . The makeup brush bristle material according to  claim 10 , characterized in that the polyester resin consists of one or two or more types selected from polytrimethylene terephthalate, polyethylene terephthalate, and polybutylene terephthalate. 
     
     
         18 . A makeup brush characterized by using, at least partially, the makeup brush bristle material according to  claim 10 . 
     
     
         19 . A makeup brush characterized by using, at least partially, the makeup brush bristle material according to  claim 15 . 
     
     
         20 . A makeup brush characterized by using, at least partially, the makeup brush bristle material according to  claim 17 .

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