Fastener Element and Method for Producing Same

Patent metadata

Field	Value
Publication number	US-2017311684-A1
Application number	US-201415520741-A
Country	US
Kind code	A1
Filing date	Oct 29, 2014
Priority date	Oct 29, 2014
Publication date	Nov 2, 2017
Grant date	—

Abstract

Elements are made of a polyacetal resin, which can effectively improve the chain crosswise strength while maintaining wear resistance. Provided is a fastener element made of a polyacetal resin composition containing 5 to 30% by mass of reinforcing fibers each having an average fiber diameter of 5 to 15 μm and a numeric average fiber length of 150 to 500 μm.

First claim

1 . A fastener element made of a polyacetal resin composition containing 5 to 30% by mass of reinforcing fibers having an average fiber diameter of 5 to 15 μm and a numeric average fiber length of 150 to 500 μm.

2 . The fastener element according to claim 1 , wherein the reinforcing fibers have a fiber length distribution Lw/Ln of 1.0 to 2.0 in which Ln represents the numeric average fiber length and Lw represents a weight average fiber length.

3 . The fastener element according to claim 2 , wherein the reinforcing fibers have the average fiber diameter of 6 to 13 the numeric average fiber length of 200 to 350 μm, and the Lw/Ln of 1.1 to 1.8, and wherein the polyacetal resin composition contains 10 to 20% by mass of the reinforcing fibers.

4 . The fastener element according to claim 1 , wherein the fastener element has a thickness t of 2.6 mm or less, a lateral direction length l of 4.5 mm or less, and a longitudinal direction length m of 3.2 mm or less.

5 . The fastener element according to claim 1 , wherein the fastener element is produced by injection molding.

6 . A method for producing a fastener element comprising a polyacetal resin composition containing reinforcing fibers, the method comprising:
adjusting the content of the reinforcing fibers in the polyacetal resin composition by producing a masterbatch through a step of melt-kneading a first polyacetal resin composition containing the reinforcing fibers, and then mixing the masterbatch with a second polyacetal resin composition that does not contain the reinforcing fibers.

7 . A fastener stringer comprising the fastener elements according to claim 1 .

8 . A fastener chain comprising the fastener elements according to claim 1 , wherein the fastener chain has a pitch p between the elements of 3.5 mm or less, a chain width w of 6.3 mm or less, and a thickness t of 2.6 mm or less.

9 . A slide fastener comprising the fastener elements according to claim 1 or the fastener chain according to claim 8 .

10 . An article comprising the slide fastener according to claim 9 .

Assignees

• Ykk Corp

Inventors

• Asami Toshiyuki
• Michihata Isamu
• Nakamura Sayaka
• Kojima Yoshinori

Classifications

• A44B19/02

  with a series of separate interlocking members secured to each stringer tape · CPC title

• A44B19/24 Primary

  Details · CPC title

• A44B19/42

  Making by processes not fully provided for in one other class, e.g. B21D53/50, B21F45/18, B22D17/16, B29D5/00 {(attaching closure devices, e.g. slide fasteners, to bags B31B70/813; making package opening by applying or incorporating profile strips, e.g. for reclosable bags B65B61/188)} · CPC title

• A44B19/06 Primary

  with substantially rectangular members having interlocking projections and pieces · CPC title

• Y10T24/25

  Zipper or required component thereof · CPC title