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Production of texturised yarn

阅读：172发布：2022-02-28

专利汇可以提供Production of texturised yarn专利检索，专利查询，专利分析的服务。并且A process for the production of texturised yarn wherein thermoplastic synthetic yarn is sequentially stretched and texturised comprising stretching yarn between a feed means and a draw roll and texturising the drawn yarn by the friction false twist principle wherein the draw roll is also the feed means for and controls the tension of the yarn in the texturising zone characterised in that the yarn passes a plurality of times from the draw roll to a separator roll before reaching the heater of the texturising zone and the separator roll acts as a twist damming element which substantially prevents the twist inserted by the texturising unit running back to the draw roll.，下面是Production of texturised yarn专利的具体信息内容。

权利要求

1. A process for the production of texturised yarn wherein thermoplastic synthetic yarn is sequentially stretched and texturised comprising stretching yarn between a feed means and a draw roll and texturising the drawn yarn by the friction false twist principle wherein the draw roll is also the feed means for and controls the tension of the yarn in the texturising zone characterised in that the yarn passes a plurality of times from the draw roll to a separator roll before reaching the heater of the texturising zone and the separator roll acts as a twist damming element which substantially prevents the twist inserted by the texturising unit running back to the draw roll.

2. A process according to claim 1 in which a groove is formed at the position on the separator roll which acts as the twist damming element.

3. A process according to claim 1 in which the yarn is fed directly from the draw roll to the twist damming element then through a heater zone to the twist device and finally to the take off unit.

4. A process according to claim 3 in which the heater zone comprises a pin heater around which the yarn is wrapped.

5. A process according to claim 4 in which the separator roll can be moved to alter the extent to which the yarn is wrapped around the pin heater.

6. A process according to claim 1 in which the yarn is withdrawn from the twist device by a withdrawing unit in such a way that the yarn is subject to an increase in tension between the draw roll and the withdrawing unit.

7. A process according to claim 6 in which the withdrawing unit and the drawing means are a single roller which is stepped with the portion of smaller diameter acting as the drawing means and the portion of larger diameter as the withdrawing unit.

8. An apparatus for the production of texturised yarns by sequentially drawing and texturising yarn comprising feed means for not fully drawn yarn, a stretching roller for drawing the not fully drawn yarn which stretching roller delivers the yarn to a texturising zone comprising a heater and a yarn twisting element situated so that the yarn passes the heater before reaching the twisting element characterised in that the roller is associated with a separator roll and the yarn passes a plurality of times between the roller and the separator roll so that said separator roll acts as a twist damming element.

9. An apparatus according to claim 8 in which a groove is formed in the separator roll to take the wrap of the yarn in the position of the separator roll which acts as the twist damming element.

10. An apparatus according to claim 8 in which the heater is a pin heater.

11. An apparatus according to claim 10 in which the position of the twist separator roll may be altered to vary the wrap of the yarn around the pin.

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