Fastening component and method for manufacturing the fastening component

Patent metadata

Field	Value
Publication number	US-9505915-B2
Application number	US-201214416094-A
Country	US
Kind code	B2
Filing date	Nov 5, 2012
Priority date	Nov 5, 2012
Publication date	Nov 29, 2016
Grant date	Nov 29, 2016

Abstract

A fastening component is a molded article of a mixture in which microfibrillated cellulose fibers are dispersed in a thermoplastic resin, wherein the thermoplastic resin has a melting point of between 150 and 200° C., and wherein when the total mass % of the thermoplastic resin and the cellulose fibers is set to be 100 mass %, the mass % of the cellulose fibers included in the mixture is greater than 20 mass % and less than 60 mass %. When the total mass % of the thermoplastic resin and the cellulose fibers is set to be 100%, the mass % of the cellulose fibers included in the mixture is preferably equal to or greater than 30 mass % and equal to or less than 50 mass %.

First claim

The invention claimed is:

1. A fastening component that is a molded article of a mixture, the mixture comprising;
a thermoplastic polymer resin having a melting point of between 150 and 200° C., wherein the thermoplastic polymer resin comprises a polyamide;
microfibrillated cellulose fibers dispersed in the thermoplastic polymer resin; and
an inorganic pigment, wherein when the total mass % of the thermoplastic polymer resin and the cellulose fibers is set to be 100 mass %, the mass % of the cellulose fibers included in the mixture is greater than 35 mass % and less than 60 mass % and wherein
the mixture melted at a temperature of 220° C. has a melt viscosity of equal to or less than 500 Pa/s at shear velocity of 12160 sec −1 and a melt viscosity of equal to or greater than 5000 Pa/s at shear velocity of 12.16 sec −1 .

2. The fastening component of claim 1 , wherein when the total mass % of the thermoplastic polymer resin and the cellulose fibers is set to be 100%, the mass % of the cellulose fibers included in the mixture is equal to or greater than 35 mass % and equal to or less than 50 mass %.

3. The fastening component of claim 1 , wherein the mass % of the inorganic pigment in the mixture is between 0.5 and 5 mass %, the inorganic pigment being added in addition to the total 100 mass % of the thermoplastic polymer resin and the cellulose fibers.

4. The fastening component of claim 1 , a specimen having a predetermined size of 80 mm length, 10 mm width, and 4 mm thickness which is obtained through melting the fastening component has a bending strength that is equal to or greater than 100 MPa.

5. The fastening component of claim 4 , wherein the specimen has a bending elastic modulus that is equal to or greater than 4000 GPa.

6. The fastening component of claim 1 , wherein the fastening component is a fastener slider for a slide fastener.

7. The fastening component of claim 1 , wherein when the total mass % of the thermoplastic polymer resin and the cellulose fibers is set to be 100 mass %, the mass % of the cellulose fibers included in the mixture is equal to or greater than 40 mass % and less than 60 mass %.

8. The fastening component of claim 1 , wherein the microfibrillated cellulose fibers include hydrophobized transformed cellulose fibers.

9. The fastening component of claim 1 , wherein the mixture melted at a temperature of 220° C. has a melt viscosity of equal to or less than 400 Pa/s at shear velocity of 12160 sec −1 and a melt viscosity of equal to or greater than 8000 Pa/s at shear velocity of 12.16 sec −1 .

10. A manufacturing method of a fastening component, the method comprising:
supplying a melted mixture into a mold, the mixture comprising a thermoplastic polymer resin and microfibrillated cellulose fibers dispersed in the thermoplastic polymer resin, the melting point of the thermoplastic polymer resin being between 150 and 200° C., and the mass % of the cellulose fibers included in the melted mixture is greater than 35 mass % and less than 60 mass % when the total mass % of the thermoplastic polymer resin and the cellulose fibers is set to be 100 mass %; and
cooling the melted mixture filled in the mold,
wherein
the mixture melted at a temperature of 220° C. has a melt viscosity of equal to or less than 500 Pa/s at shear velocity of 12160 sec −1 and a melt viscosity of equal to or greater than 5000 Pa/s at shear velocity of 12.16 sec −1 .

11. The manufacturing method of a fastening component of claim 10 , wherein the mixture melted at a temperature of 220° C. has a melt viscosity of equal to or less than 400 Pa/s at shear velocity of 12160 sec −1 and a melt viscosity of equal to or greater than 8000 Pa/s at shear velocity of 12.16 sec −1 .

12. The manufacturing method of a fastening component of claim 10 , further comprising:
mixing the thermoplastic polymer resin and microfibrillated cellulose fibers to disperse the microfibrillated cellulose fibers in the thermoplastic polymer resin.

Assignees

• Kyoto Municipal Inst Of Ind Tech And Culture
• Ykk Corp

Inventors

• Senba Takeshi
• Kitagawa Kazuo
• Itou Akihiro
• Mizumoto Kazuya

Classifications

• B29L2005/00

  Elements of slide fasteners · CPC title

• C08L77/08

  from polyamines and polymerised unsaturated fatty acids · CPC title

• B29K2201/00

  Use of cellulose, modified cellulose or cellulose derivatives, e.g. viscose, as reinforcement · CPC title

• B29K2105/122

  microfibres or nanofibers · CPC title

• B29K2309/08

  Glass · CPC title