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Barre reduction process

阅读:758发布:2022-03-01

专利汇可以提供Barre reduction process专利检索,专利查询,专利分析的服务。并且A pre-dyeing method for substantially eliminating or at least greatlly reducing the potential for thermally induced barre in textured synthetic yarns or fabrics. In a preferred embodiment yarns or fabrics which are known or believed to be likely to develop thermal barre are heated briefly at a temperature essentially equal to the highest temperature reached by any portion of the yarn or group of yarns during texturing.,下面是Barre reduction process专利的具体信息内容。

1. A PROCESS FOR SUBSTANTIALLY REDUCING OR ELIMINATING THERMAL BARRE IN A DYED FABRIC COMPRISING TEXTURED SYNTHETIC YARNS WHICH HAVE DIFFERENT DYEING CHARACTERISTICS CAUSED BY THERMAL VARIATION IN THE TEXTURING OF THE YARNS, SAID PROCESS COMPRISING DRY HEATING SAID YARNS, AFTER TEXTURING BY A PROCESS FROM THE GROUP CONSISTING OF FALSE-TWIST, STUFFER-BOX, KNIFE-EDGE, TWIST, GEAR, JET AMD KNIT-DEKNIT AND BEFORE DYEING, AT A TEMPERATURE ABOUT EQUAL TO THE HIGHEST TEMPERATURE USED IN TEXTURING THE YARNS, SAID DRY HEATING BEING CONTINUED FOR A TIME PERIOD OF FROM ABOUT 0.5 MINUTES TO ABOUT 15 MINUTES UNTIL THE EFFECTS OF THERMAL VARIATION IN TEXTURING HAVE BEEN EQUILIBRATED AND ONLY THEREAFTER DYEING SAID YARNS.
2. A process according to claim 1 wherein the textured synthetic yarns are continuous filament thermoplastics.
3. A process according to claim 1 wherein said yarns are polyester yarns.
4. A process according to claim 1 wherein said yarns are nylon yarns.
5. A process according to claim 1 comprising the steps of determining portions of said fabric which contain yarns that are representative of the yarns used in the production of said fabric; removing at least one fabric sample from at least one of said representative portions; dyeing at least a portion of each of said fabric samples to emphasize the barre effect occurring between said yarns in each fabric sample; dividing said undyed portion of each of said fabric sample into strips and dry heat treating each of said strips for constant periods of time and at different temperatures; dyeing said strips in a manner similar to the way in which the previously dyed portion was dyed; comparing the previously dyed portion of each fabric sample with said strips divided out of the previously undyed portion of the same fabric sample after said strips have been heat treated and dyed; determining the amount of heat input, as a function of time and temperature, required to eliminate any barre effect existing between said yarns due to thermal variation in previous texturing of said yarns; treating said textile material at said determined amount of heat input so that the effects of said thermal variation are equilibrated in substantially all yarns within said textile material and dyeing said textile material.
6. A process according to claim 5 wherein said different temperatures are within the range of 170* to 250* C.
7. A process according to claim 5 wherein said different temperatures are within the range of 190* to 230* C.
8. A process according to claim 7 wherein the heat treatment is a dry-heat treatment for a period of about 1 minute to about 5 minutes.
9. A process according to claim 5 whereiN said textured yarns contain a combination of at least two different fiber forming materials.
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