Fastener element and method for producing same

Patent metadata

Field	Value
Publication number	US-10098420-B2
Application number	US-201415520741-A
Country	US
Kind code	B2
Filing date	Oct 29, 2014
Priority date	Oct 29, 2014
Publication date	Oct 16, 2018
Grant date	Oct 16, 2018

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

What is claimed is:

1. A fastener element made of a polyacetal resin composition containing 13 to 17% by mass of reinforcing fibers having an average fiber diameter of 8-11 μm and a numeric average fiber length of 200 to 270 μm, wherein the reinforcing fibers have a fiber length distribution Lw/Ln of 1.0 to 1.5 in which Ln represents the numeric average fiber length and Lw represents a weight average fiber length.

2. 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.

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

4. A method for producing the fastener element according to claim 1 , 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.

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

6. 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.

7. A slide fastener comprising the fastener elements according to claim 1 or the fastener chain according to claim 6 .

8. An article comprising the slide fastener according to claim 7 .

Assignees

• Ykk Corp

Inventors

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

Classifications

• Y10T24/25

  Zipper or required component thereof · CPC title

• A44B19/06 Primary

  with substantially rectangular members having interlocking projections and pieces · 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

• Y10T24/2539

  Interlocking surface constructed from plural elements in series · CPC title

• A44B19/02

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