Method and apparatus for entangling yarns

Patent metadata

Field	Value
Publication number	US-9528199-B2
Application number	US-201314379857-A
Country	US
Kind code	B2
Filing date	Feb 11, 2013
Priority date	Feb 20, 2012
Publication date	Dec 27, 2016
Grant date	Dec 27, 2016

Abstract

A fluid jet is directed onto a first yarn at least at sonic speed to entangle the first yarn, which is aligned substantially parallel to a main yarn, into the main yarn enabling that yarns having a high yarn count and/or wet yarns can be entangled.

First claim

The invention claimed is:

1. A method of entangling a first yarn into a moving main yarn, comprising:
aligning the first yarn substantially parallel to the main yarn, and
subsequently directing a fluid jet onto the first yarn for separating filaments and/or groups of filaments in the first yarn from each other and to intermingle filaments and/or groups of filaments of the first yarn with filaments and/or groups of filaments of the main yarn to form mechanical friction points between filaments and/or groups of filaments from the first yarn and the main yarn, thereby entangling the first yarn into the moving main yarn, wherein
the fluid jet is directed onto the first yarn at least at sonic speed, and
a speed of the main yarn before and after the entangling is essentially the same.

2. The method according to claim 1 , wherein
a second yarn is aligned substantially parallel to the main yarn and
the fluid jet forms mechanical friction points between filaments and/or groups of filaments from the first yarn, the second yarn and the main yarn.

3. The method according to claim 1 , wherein
the first yarn moves at a speed of at least at a speed of 105% of the speed of the main yarn.

4. The method according to claim 1 , wherein
the first yarn comprises at least 10 wt. % of a liquid based on a weight of polymer in the first yarn.

5. The method according to claim 1 , wherein
tension on the first yarn is 95% or less of tension on the main yarn.

6. The method according to claim 1 , wherein
the fluid jet is directed onto the first yarn for a time period of 0.3 seconds or less.

7. The method according to claim 1 , wherein
the fluid jet is reflected, after having intermingled filaments and/or groups of filaments of the first yarn with filaments and/or groups of filaments of the main yarn, such that the fluid jet is redirected onto the main yarn for separating filaments and/or groups of filaments in the main yarn from each other and to intermingle filaments and/or groups of filaments of the main yarn with filaments and/or groups of filaments of the first yarn to form mechanical friction points between filaments and/or groups of filaments from the main yarn and the first yarn.

8. An apparatus for entangling a first yarn into a moving main yarn comprising:
an aligning unit that aligns the first yarn substantially parallel to the main yarn; and
a generating unit that generates a fluid jet directed onto the first yarn for separating filaments and/or groups of filaments in the first yarn from each other and to intermingle filaments and/or groups of filaments of the first yarn with filaments and/or groups of filaments of the main yarn to form mechanical friction points between filaments and/or groups of filaments from the first yarn and the main yarn, thereby entangling the first yarn into the moving main yarn;
wherein the generating unit generates the fluid jet at least at sonic speed when in use, and
a speed of the main yarn before and after the entangling is essentially the same.

9. The apparatus for entangling a first yarn into a main yarn according to claim 8 ,
wherein the generating unit comprises a receptacle for containing a compressed fluid and a valve for releasing a pulse of compressed fluid in the direction of the first yarn.

10. The apparatus for entangling a first yarn into a main yarn according to claim 9 ,
wherein the receptacle is located within 1 m from the first yarn.

11. The apparatus for entangling a first yarn into a main yarn according to claim 9 , further comprising a reflecting unit that reflects the fluid jet after having intermingled filaments and/or groups of filaments of the first yarn with filaments and/or groups of filaments of the main yarn.

12. The apparatus for entangling a first yarn into a main yarn according to claim 8 ,
wherein the aligning unit is capable of aligning the first yarn at a distance of less than 10 mm from the main yarn.

13. The apparatus for entangling a first yarn into a main yarn according to claim 8 , further comprising a first adjusting unit that adjusts the tension on the main yarn.

14. The apparatus for entangling a first yarn into a main yarn according to claim 8 , further comprising an adjusting unit that adjusts the tension on the first yarn.

15. The apparatus for entangling a first yarn into a main yarn according to claim 8 , further comprising a cutting unit that cuts off the leading part of the first yarn.

Assignees

• Teijin Aramid Bv

Inventors

• Journée Marinus
• Van Assenbergh Karel Johannes

Classifications

• D02G1/20

  Combinations of two or more of the above-mentioned operations or devices; After-treatments for fixing crimp or curl · CPC title

• D02J1/18

  Separating or spreading · CPC title

• D01H4/04

  imparting twist by contact of fibres with a running surface · CPC title

• D02J1/08 Primary

  Interlacing constituent filaments without breakage thereof, e.g. by use of turbulent air streams · CPC title

• D02G1/16

  using jets or streams of turbulent gases, e.g. air, steam {(interlacing filaments D02J1/08)} · CPC title