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Method for preparing mixed regenerated polyester fibers special for non-woven material

A recycled polyester and non-woven technology, applied in fiber processing, rayon manufacturing, fiber chemical characteristics, etc., can solve the problems of low fiber strength, long elongation, and little development of mixed fibers, etc., to achieve excellent mixing effect and reduce Production cost, the effect of improving technical indicators

Active Publication Date: 2012-06-20
福建鑫华股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, mixed fibers used in the production of dry-laid and wet-laid non-woven materials are rarely developed. The cotton feeding process uses manual weighing and mixing, which increases the labor intensity on the one hand, and poor uniformity of manual mixing on the other hand.
In the process of preparing mixed fibers, because the fibers of two finenesses are mixed in a certain proportion, compared with the ordinary polyester production process and spinneret specifications, the raw yarns spun from the two boxes cannot be fully drawn, resulting in Relatively coarse denier fibers have low strength and large elongation, and the technical indicators cannot reach the industry standard of recycled polyester fibers

Method used

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  • Method for preparing mixed regenerated polyester fibers special for non-woven material
  • Method for preparing mixed regenerated polyester fibers special for non-woven material
  • Method for preparing mixed regenerated polyester fibers special for non-woven material

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Experimental program
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Effect test

Embodiment 1

[0021] Such as figure 1 Shown, the preparation method of a kind of non-woven special mixed regenerated polyester fiber of the present invention, realize by following steps:

[0022] 1. 2399.52 kg of waste PET bottle flakes and 0.48 kg of fluorescent whitening agent are used as spinning raw materials; the melting point of waste PET bottle flakes is 256°C, the viscosity is 0.65dl / g, and the PVC content is 0.034%.

[0023] 2. Blend the above-mentioned spinning raw materials evenly and put them into a drum vacuum machine for drying. Set the vacuum degree of the drum vacuum machine to -0.098Mpa, set the steam pressure to 5.4kg, and set the drying temperature to 150°C. 10h, make the moisture content of waste PET bottle flakes be 132PPM.

[0024] 3. The above-mentioned dried spinning raw materials are fed into the screw extruder of the melt spinning equipment, and melt spinning is carried out through the spinning box of the melt spinning equipment. In the present embodiment, two sp...

Embodiment 2

[0030] Such as figure 1 Shown, the preparation method of a kind of non-woven special mixed regenerated polyester fiber of the present invention, realize by following steps:

[0031] 1. 1919.52 kg of waste PET bottle flakes, 240 kg of chemical fiber friction material, 240 kg of foam material and 0.48 kg of fluorescent whitening agent are used as spinning raw materials. Among them, the melting point of waste PET bottle flakes is 256°C, the viscosity is 0.68dl / g, and the PVC content is 0.035%; the melting point of chemical fiber friction material is 250°C, the intrinsic viscosity is 0.55dl / g, and the PVC content is 0.034%; the melting point of foam material is 255℃, intrinsic viscosity is 0.62dl / g, PVC content is 0.036%;

[0032] 2. Blend the above-mentioned spinning raw materials and evenly add them to the drum vacuum machine for drying. Set the vacuum degree to -0.098Mpa, the steam pressure to 5.5kg, the drying temperature to 150°C, and dry for 10.5h, so that the waste PET Th...

Embodiment 3

[0039] Such as figure 2 Shown, the preparation method of a kind of non-woven special mixed regenerated polyester fiber of the present invention, realize by following steps:

[0040] 1. 1919.52 kg of waste PET bottle flakes, 480 kg of chemical fiber friction material or foam material and 0.48 kg of fluorescent whitening agent are used as raw materials for spinning; the melting point of waste and old PET bottle flakes is 254°C, the viscosity is 0.66dl / g, and the PVC content is 0.032%; chemical fiber friction material has a melting point of 250°C, an intrinsic viscosity of 0.55dl / g, and a PVC content of 0.034%; foam material has a melting point of 255°C, an intrinsic viscosity of 0.62dl / g, and a PVC content of 0.036%.

[0041] 2. Blend the above-mentioned spinning raw materials and evenly add them to the drum vacuum machine for drying. Set the vacuum degree to -0.098Mpa, the steam pressure to 5.6kg, the drying temperature to 150°C, and dry for 10.2 hours. It is 108PPM.

[0042...

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Abstract

The invention discloses a method for preparing mixed regenerated polyester fibers special for a non-woven material. The method comprises the following steps of: mixing spinning raw materials such as bottle flakes, a chemical fiber friction material, a bubble material and a fluorescent brightener, drying by using a vacuum drum dryer, and performing melt spinning to obtain as-spun fibers with two or more kinds of fineness through two or more spinning box bodies of melt spinning equipment; winding, doffing and bundling the as-spun fibers in turn; drawing in an oil bath, drawing in steam, and reeling; and performing heat setting to prepare the mixed regenerated polyester fibers special for the non-woven material. Compared with the prior art, the method has the advantages that: the fibers produced by the method have two or more kinds of fineness, the raw materials are stably proportioned and uniformly mixed, the non-woven material can have good opening and mixing effects, and the technical index of the non-woven material can be effectively improved. The mixed fibers can be used for producing different styles of non-woven materials, work efficiency is improved, and production cost is reduced.

Description

【Technical field】 [0001] The invention relates to the field of nonwovens, in particular to a preparation method of special mixed recycled polyester fibers for nonwovens. 【Background technique】 [0002] Nonwovens are different from traditional textiles in that they are fiber aggregates directly composed of fiber raw materials. Among the fiber raw materials used in the non-woven industry, the proportion of chemical fibers is increasing, accounting for about 90%, mainly including polyester, polypropylene, nylon, viscose, and hot-melt fibers. According to the use function of non-woven materials, choosing fiber combinations with different deniers, different lengths, different crimps, different cross-sectional shapes, and different surface properties to complement each other can achieve unexpected results. The commonly used method is to use different fiber raw materials together, or to use the same fiber with different deniers to improve the performance, quality and price of nonw...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D01F6/92D01F1/10D01D5/096D01D5/14D01D10/02
Inventor 粘伟诚王宝荣白玉光曾鹏程吴端
Owner 福建鑫华股份有限公司
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