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Preparation method of poly (p-phenylene terephthalamide) (PPTA) fiber with high elongation at break

A technology of p-phenylenediamine phthalamide and a manufacturing method, which are applied in the field of man-made fibers, can solve problems such as influence and low elongation at break, and achieve the effects of high process efficiency, few fiber structure defects, and low industrialization cost.

Inactive Publication Date: 2017-04-26
CHINA BLUESTAR CHENGRAND CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0019] The present invention aims to solve the problem that the elongation at break of poly-p-phenylene terephthalamide fibers in the prior art is low relative to other flexible molecular materials, and the elongation at break is usually lower than 3.6%. The problem that the application of the field of rate is affected, provide a kind of manufacture method of poly-p-phenylene terephthalamide fiber with high elongation at break, the poly-p-phenylene terephthalamide fiber that this method manufactures has High elongation at break, suitable for industrial scale production, with excellent impact resistance and fatigue resistance, more suitable for conveyor belts and tires

Method used

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  • Preparation method of poly (p-phenylene terephthalamide) (PPTA) fiber with high elongation at break
  • Preparation method of poly (p-phenylene terephthalamide) (PPTA) fiber with high elongation at break

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Embodiment 1

[0039] A kind of manufacture method of high elongation at break poly-p-phenylene terephthalamide fiber, it is characterized in that: take the poly-p-phenylene terephthalamide polymer of logarithmic viscosity 4.5dl / g as raw material, Use 96% concentrated sulfuric acid as a solution to make spinning stock solution, use dry jet wet spinning process, form primary filaments through spinneret, and then enter coagulation bath to solidify and form, and the coagulated and formed fibers are washed, neutralized, dried and Oiling, winding into products, wherein in the process of washing, neutralization, drying, oiling and winding, the yarn tension is controlled at 0.1g / d.

Embodiment 2

[0041] A kind of manufacture method of high elongation at break poly-p-phenylene terephthalamide fiber, it is characterized in that: take the poly-p-phenylene terephthalamide polymer of logarithmic viscosity 7.5dl / g as raw material, 100% concentrated sulfuric acid is used as the solution to make the spinning stock solution, and the dry-jet wet spinning process is used to form primary filaments through the spinneret, and then enter the coagulation bath to solidify and form, and the coagulated and formed fibers are washed, neutralized, dried and Oiling, winding into products, wherein in the process of washing, neutralization, drying, oiling and winding, the yarn tension is controlled at 0.5g / d.

Embodiment 3

[0043] A kind of manufacture method of high breaking elongation poly-p-phenylene terephthalamide fiber, it is characterized in that: take the poly-p-phenylene terephthalamide polymer of logarithmic viscosity 6dl / g as raw material, with 98% concentrated sulfuric acid is used as a solution. After the spinning stock solution is made, the dry jet wet spinning process is used to form primary filaments through the spinneret, and then enter the coagulation bath to solidify and form. The coagulated and formed fibers are washed, neutralized, dried and processed. Oil, coiled into products, wherein in the process of washing, neutralizing, drying, oiling and coiling, the yarn tension is controlled at 0.3g / d.

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Abstract

The invention relates to a preparation method of poly (p-phenylene terephthalamide) (PPTA) fiber with high elongation at break, and belongs to the technical field of artificial fiber. The preparation method is characterized by after preparing a spinning solution by taking a PPTA polymer of which the logarithmic viscosity is 4.5 to 7.5 dl / g as a raw material and concentrated sulfuric acid of which the concentration is 96 to 100 percent as a solution, forming as-spun filaments through a spinneret plate by adopting a dry-jet wet-spinning technology, then entering a coagulating bath to realize coagulation forming, and winding fiber after coagulation forming into a product after washing, neutralizing, drying and oiling the fiber, wherein the filament tension is controlled to be 0.5g / d or lower during the processes of washing, neutralizing, drying, oiling and winding. The PPTA fiber with the high elongation at break has good impact resistance and good fatigue resistance, and is relatively suitable for the field of rubber composite materials and bulletproof composite materials.

Description

technical field [0001] The present invention relates to a kind of manufacturing method of fiber, more specifically, the present invention relates to a kind of manufacturing method of poly(p-phenylene terephthalamide) fiber with high elongation at break, which belongs to the technical field of man-made fiber. Background technique [0002] Poly(p-phenylene terephthalamide) (PPTA) fiber was synthesized by DuPont of the United States in 1965 by low-temperature solution polycondensation reaction, and then PPTA / H 2 SO 4 The solution has liquid crystal behavior, and the dry-jet wet spinning method was invented to obtain high-performance poly-p-phenylene terephthalamide fiber (referred to as "aramid fiber 1414"). The patents of related technologies were published in the United States in 1970-1985, such as patent number: 3671542, 3819587, 19730361818, 3767756, 3869429, 3849430, 4726922, 5009830849, 1988018268888888888888888888888888888888888888888888888888888888888888888888888888888...

Claims

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Application Information

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IPC IPC(8): D01F6/60D01D1/10D01D4/02D01D5/00D01D5/06
CPCD01F6/60D01D1/106D01D4/02D01D5/00D01D5/06
Inventor 崔晓静孙潜
Owner CHINA BLUESTAR CHENGRAND CO LTD
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