# US 4,395,871 A · Process for the manufacture of twistless or substantially twistless yarn and the yarn obtained according to this process

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- Number: US 4,395,871 A
- Document ID: US4395871A
- Status: Granted
- Kind: A
- Application number: 06/190,253
- Filed: 1980-09-24
- Granted: 1983-08-02
- Earliest claimed: 1979-09-28
- Assignees: Chem-Y Fabriek Van Chemische Producten, BV
- Inventors: Jacob K. Smid; Thomas H. M. Terwee
- Web page: https://patentgrep.com/patent/US4395871A

## CPC

- D02G 3/406: {where the polymeric solution is removable at a later stage, e.g. by washing}
- D02G: CRIMPING OR CURLING FIBRES, FILAMENTS, THREADS, OR YARNS; YARNS OR THREADS

## Abstract

A method of manufacturing twistless or substantially twistless yarn consisting of dry drafting a sliver, moistening the drafted sliver with a water-soluble cation-active polymer bonding agent, drafting the sliver in the web state, false twisting the sliver, activating the bonding agent by drying the sliver on a heated drum and winding the resultant yarn up on cross wound cheeses, and a yarn manufactured according to this process.

## Claims

### Claim 1

In processes for the manufacture of twistless or substantially twistless yarn which comprises drafting a sliver of staple fiber to a thinner fiber strand, false twisting the fiber strand and bonding it with the aid of a bonding agent, which bonding agent can be removed from products manufactured using the twistless yarn, the improvement consisting essentially in employing a water-soluble cation-active quaternized starch polymer as the bonding agent.

### Claim 2 (depends on 1)

A process for the manufacture of twistless or substantially twistless yarn according to claim 1, wherein said quaternized starch has a degree of substitution of between 0.005 and 0.5.

### Claim 3 (depends on 2)

A process for the manufacture of twistless or substantially twistless yarn according to claim 2, wherein said starch is quaternized with glycidyl trimethyl ammonium chloride.

### Claim 4 (depends on 1)

A process for the manufacture of twistless or substantially twistless yarn according to any one of claims 1, or 2 wherein a bonding agent with an activation time of 5 seconds or less is used.

### Claim 5

A twistless or substantially twistless yarn manufactured by drafting a sliver of staple fiber to a thinner fiber strand, false twisting the fiber strand and bonding it with the aid of a water-soluble cation-active quarternized starch polymer bonding agent, which agent can be removed from the final product.