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Method for preparing ultrahigh molecular weight polyethylene (UHMWPE) colored fibre

An ultra-high molecular weight, colored fiber technology, applied in the direction of single-component polyolefin rayon, fiber treatment, stretch spinning, etc., can solve the problem of uneven color of fiber products, difficulty in mixing particularly uniform, and low breaking strength and other problems, to achieve the effect of convenient color switching, simple process operation and reduced production cost

Active Publication Date: 2011-09-28
CHANGSHU SUPERFIBER
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The disadvantage of this method is that only colored ultra-high molecular weight polyethylene fibers with low breaking strength can be obtained. During the preparation process, the solvent is polluted by pigments, which is not easy to recycle, and the cost is high. Micron-sized inorganic pigments and ultra-high The molecular weight polyethylene powder is mixed directly in the solvent, it is difficult to mix it uniformly, and the color of the obtained fiber product is not uniform

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] The present embodiment provides a kind of preparation method of ultra-high molecular weight polyethylene red fiber, comprising the following steps:

[0023] (1) Preparation of colored frozen collagen filaments of ultra-high molecular weight polyethylene: Add organic heterocyclic red pigments with an average particle size of 500nm to ultra-high molecular weight polyethylene (relative average molecular mass: 4.5 million) powder, The ratio of 2:1000 is fully stirred and mixed to form a colored polymer of ultra-high molecular weight polyethylene. The stirring and mixing is carried out in a double-helix conical mixer (Qinhuangdao Funing Chemical Light Machinery Factory, YSH series) at room temperature for about 15 minutes .

[0024] (2) Inject the colored polymer obtained in step (1), 70# solvent white oil and phenolic antioxidant into the unwrapping kettle at a mass ratio of 8:100:0.16, and shear for 25 minutes under nitrogen protection , shear rate 3000 sec -1 An emulsio...

Embodiment 2

[0027] This example provides a method for preparing ultra-high molecular weight polyethylene yellow fibers, as follows: adding organic heterocyclic yellow pigments with an average particle size of 500 nm to ultra-high molecular weight polyethylene (relative average molecular mass: 4.5 million) powder , fully stirred and mixed according to the mass ratio of 2:1000 to form a colored polymer of ultra-high molecular weight polyethylene. The stirring and mixing was carried out in a double-helix conical mixer (Qinhuangdao Funing Chemical Light Machinery Factory, YSH series) at room temperature About 15 minutes; Then according to the same method as the steps (2) and (3) of Example 1, the ultra-high molecular weight polyethylene yellow fiber was prepared. After testing, the fiber breaking strength reaches 31cn / dtex, and the modulus is above 1000 g / d.

Embodiment 3

[0029] This example provides a preparation method of ultra-high molecular weight polyethylene orange fiber, which is as follows: adding an organic heterocyclic orange pigment with an average particle size of 500 nm to ultra-high molecular weight polyethylene (relative average molecular mass: 4.5 million) powder , fully stirred and mixed according to the mass ratio of 2:1000 to form a colored polymer of ultra-high molecular weight polyethylene. The stirring and mixing was carried out in a double-helix conical mixer (Qinhuangdao Funing Chemical Light Machinery Factory, YSH series) at room temperature About 15 minutes; Then according to the same method as the steps (2) and (3) of Example 1, the ultra-high molecular weight polyethylene yellow fiber was prepared. After testing, the fiber breaking strength reaches 31cn / dtex, and the modulus is above 1000 g / d.

[0030] In summary, the present invention mixes nano-scale organic heterocyclic pigments with ultra-high molecular weight po...

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Abstract

The invention relates to ultrahigh molecular weight polyethylene (UHMWPE) colored fibre and a method for preparing the same. The method comprises the following steps: firstly adding nanoscale organic heterocyclic pigments to UHMWPE powder and fully stirring and mixing the pigments and the powder in a double-thread conical mixer to obtain colored polymers; then continuously adding the colored polymers and auxiliaries to an untwisting kettle which can provide at least 1000s<-1> shearing rate to form emulsion-like mixed liquor; performing the secondary shearing and grinding on the mixed liquid by a high shear dispersion and emulsification pump; and then carrying out extrusion spinning, extracting, drying and hot drawing in a screw extruder to form the UHMWPE colored fibre. The method is simple in operation and convenient in collar change, and the obtained colored fibre has bright colour and high ageing resistance; the added pigments are nontoxic and pollution-free and are harmless to thehuman bodies, and the production process is clean and environmentally-friendly; and in the production process, the solvents are never polluted by the pigments and are convenient to recycle, thus further lowering the production cost.

Description

technical field [0001] The invention relates to a preparation method of ultra-high molecular weight polyethylene colored fiber. Background technique [0002] Ultra-high molecular weight polyethylene fiber (UHMWPE) is a high-performance fiber that was successfully developed in the late 1970s and entered industrialization in the early 1980s. It is mainly produced by gel spinning. In the prior art, the main steps of the jelly spinning method are as follows: the stock solution made of ultra-high molecular weight polyethylene powder and an appropriate solvent is extruded through a screw extruder, the spinneret holes are formed, and solidified in a water bath to obtain polyethylene fibers The frozen collagen filaments, the frozen collagen filaments are extracted, dried, and ultra-heated to obtain finished fibers. The fibers are all white, which cannot meet the requirements for color in rope nets and other fields. However, the UHMWPE fiber In the macromolecular chain, there are n...

Claims

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Application Information

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IPC IPC(8): D01F6/46D01F1/04D01D1/04D01D5/12D01D5/40
Inventor 许海霞刘兆峰李振国丁洪昌朱正新蔡建南
Owner CHANGSHU SUPERFIBER
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