Production of texturised yarn专利检索-纹理合成图形技术专利检索查询-专利查询网

Production of texturised yarn

阅读：997发布：2022-03-03

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 producing bulk is described by sequentially drawing and false twist texturizing a synthetic yarn wherein the yarn is withdrawn from the texturizing zone at a greater speed than it is fed thereto. In a preferred embodiment, the draw roll for the drawing step also serves as the take-off roll for the texturizing zone and is stepped so that the portion used to take off the texturized yarn is of greater diameter than the part used for drawing. A further preference is that the heater in the texturizing zone is a heated pin.，下面是Production of texturised yarn专利的具体信息内容。

权利要求

1. A process for false twist texturing a synthetic filament yarn comprising sequentially passing the yarn being treated through a drawing zone, a twist heat setting zone, a twisting zone, an untwisting zone and a yarn speed increase zone prior to take up wherein the yarn is first drawn to the desired extent prior to passing to the twist heat setting zone and twisting zone, said yarn being twisted and the twist being passed upstream into the twist heat setting zone wherein said yarn is heated to above its second order transition temperature to set said yarn in the twisted configuration, untwisting said heat set yarn, increasing the speed of said yarn up to about 10 percent as it passes through said heat setting and twisting zone and subsequently taking up a texturized yarn.

2. The process of claim 1 wherein the yarn is a polyester continuous filament yarn.

3. The process of claim 1 wherein the yarn is a polyamide continuous filament yarn.

4. The process of claim 1 wherein the yarn speed increases as it passes through said heat setting and twisting zone by 2 to 10 percent.

5. A process according to claim 4 in which the yarn speed increases by between 2 and 6%.

6. A process according to claim 1 in which the increase in speed in the yarn as it passes through the heat setting and twisting zone is such that it produces no permanent stretch in the yarn.

7. The process of claim 1 wherein the yarn passes through a twist damming zone prior to passing through said twist heat setting zone.

8. The process of claim 7 wherein the twist damming zone comprises passing the yarn through a path of curvature equalling at least a 75* turn.

9. A process according to claim 1 in which the yarn is also texturised in the stretching zone.

10. A process according to claim 1 in which the texturised yarn is further texturised.

11. An apparatus for sequentially stretching and texturising yarn comprising a draw zone with means for feeding the yarn to a texturising zone and drawing means to withdraw the yarn from said texturising zone and to effect the required drawing of the yarn and said texturising zone comprising a feed roll, a heater, a friction texturising device providing a friction surface which bears against the yarn and a means for withdrawing the yarn wherein the feed roll also acts as the withdrawing means and is stepped so that it is the portion of larger diameter which acts as the withdrawing means.

12. An apparatus according to claim 11 in which the heater in the texturising zone is a heated pin with which the yarn makes contact.

13. An apparatus according to claim 11 in which the feed roll for the texturising zone is also the drawing means for the draw zone.

14. An apparatus according to claim 11 in which the diameter of the portion of the feed roll is between 2% and 10% larger than the other portion of the roller.

15. An apparatus according to claim 11 including a twist damming element with which the yarn makes contact between the heated pin and the draw roll.

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Production of texturised yarn

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