YARN AND INFLATABLE BAG MADE THEREFROM

• US 3,842,583 A
• Filed: 06/30/1972
• Issued: 10/22/1974
• Est. Priority Date: 06/30/1972
• Status: Expired due to Term

• Current Assignee: Thomas Barton Gage
• Original Assignee: Thomas Barton Gage
• Inventors: Gage, Thomas Barton
• Primary Examiner(s): Petrakes, John
• Application Number:
  US05/268,021
• Time in Patent Office: 844 Days
• Field of Search: 57/14R,157R,157S 264/29R,29N,29T 280/15AB 150/1
• US Class Current: 57/243
• CPC Class Codes: B60R 21/235 characterised by their material
• CPC Class Codes: D02G 3/02 Yarns or threads characterised by the material or by the materials from which they are made

Abstract

A high elongation yarn made of poly(hexamethylene adipamide) filaments having specific values of toughness, tenacity, initial modulus and elongation are prepared by drawing spun yarn at a draw ratio of between 2.8 X and 3.8 X . The yarns are useful in preparing woven fabric for use in making rapidly inflatable passive restraint air bags.

Claims

1. A SYNTHETIC, MULTIFILAMENT, CONTINUOUS FILAMENT YARN OF POLY(HEXAMETHYLENE ADIPAMIDE ) HAVING A. A TOUGHNESS OF AT LEAST 1.5 GM. CM./DEN. CM., B. A TENACITY OF A LEAST 4.0 GM./DEN. (GPD), C. AN INITIAL MODULUS OF LESS THAN 25 GPD, AND D. AN ELONGATION (AT BREAK) OF AT LEAST 45 PERCENT.

2. The yarn of claim 1 wherein the yarn has:

a. a toughness of at least 1.8 gm. cm./den. cm., b. a tenacity of at least 4.5 gpd, c. an initial modulus of less than 20 gpd, and d. an elongation (at break) of at least 50 percent.

3. The yarn of claim 2 wherein the yarn has a denier of between about 100 and 500.

4. An inflatable bag made of fabric woven from poly(hexamethylene adipamide) yarn having:

5. The bag of claim 4 wherein the air permeability of the fabric is between about 2 and 15 CFM/sq. ft.

9. 9 toughness of at least 1.5 gm. cm./den. cm., b. a tenacity of at least 4.0 gm./den. (gpd), c. an initial modulus of less than 25 gpd, and d. an elongation (at break) of at least 45 percent, said fabric having a higher thread count in the direction of bag deployment during inflation, and a fabric modulus of less than 8 X 8.