High-strength industrial polyester fiber and preparation method thereof

A polyester fiber and industrial technology, applied in the field of high-strength industrial polyester fiber and its preparation, can solve the problem that the degree of molecular chain orientation is limited, the inorganic nanoparticles are difficult to have good dispersibility and compatibility, and the spinning formation is affected. Processing performance and other issues, to achieve the effect of less additives and improved mechanical properties

Active Publication Date: 2013-05-08
DONGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The introduction of spherical inorganic nanoparticles as nucleating agents will enhance the crystallization properties of polymers, but the improvement of the orientation degree of molecular chains is limited, and the dispersion of inorganic nanomaterials in

Method used

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  • High-strength industrial polyester fiber and preparation method thereof
  • High-strength industrial polyester fiber and preparation method thereof
  • High-strength industrial polyester fiber and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0047] The preparation of embodiment 1 formula (I) compound

[0048] Add 23g of n-butyl titanate to 498g (1eq) of terephthalic acid and 279g (1.5eq) of ethylene glycol, under 0.1MPa gauge pressure, react at a temperature of about 150°C for 1.2h, then raise the temperature to about 260°C to continue the reaction . Collect the distilled liquid during the esterification reaction, and stop the reaction when the mole number of water in it is twice that of terephthalic acid (that is, the degree of esterification is about 100%). Cool the reaction system, collect the solid, and grind to obtain a powdery esterified compound containing the compound of formula (I). Further, dissolve the esterified compound with a 1:1 weight ratio phenol-tetrachloroethane solution, centrifuge, and collect The insoluble matter is the compound Ti of formula (I) 4 (OCH 2 CH 2 O) 8 (OOCC 6 h 4 COO) 2 h 4 .

Embodiment 2

[0049] Embodiment 2 melt blending method

[0050] PET slices with an intrinsic viscosity of 1.0dl / g and the compound of formula (I) prepared in Example 1 are mixed at a weight ratio of 80:20 and poured into the barrel of a twin-screw extruder, and sliced ​​and pelletized after extrusion to obtain a composite parent grain.

[0051] Then the obtained composite masterbatch and PET chips with an intrinsic viscosity of 1.0dl / g are prepared according to the compound content of formula (I) at 0.3wt%, extruded through a screw extruder at a temperature of 295°C, and then cooled slowly Oiling and hot roller secondary drafting 6.0 times, and finally winding molding at a spinning speed of 3000m / min.

[0052] Performance test: GB / T14343-2003, FZ / T50002-1991, the breaking strength is 8.6cN / dtex, and the breaking elongation is 17%.

Embodiment 3

[0053] Embodiment 3 Melt Blending-Solid Phase Viscosification Method

[0054] PET chips with an intrinsic viscosity of 0.64dl / g and the compound prepared in Example 1 were mixed at a weight ratio of 99.5:0.5 and poured into the barrel of a twin-screw extruder. After extrusion, chips were pelletized to obtain a composite resin.

[0055] Under an absolute pressure of 100 Pa, the composite resin was subjected to a solid-state polycondensation reaction at a temperature of 240° C. for 22 hours to obtain high-molecular-weight composite modified PET chips with an intrinsic viscosity of 1.14 dl / g.

[0056] Then the high-molecular-weight composite modified PET chips are extruded through a screw extruder at a temperature of 293°C, then slowly cooled, cooled and oiled, and heated to a secondary draft of 6.3 times, and finally at a spinning speed of 3000m / min Roll forming.

[0057] Performance test: GB / T14343-2003, FZ / T50002-1991, the breaking strength is 8.9cN / dtex, and the breaking elo...

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Abstract

The invention belongs to the field of polyester fiber, and particularly relates to a high-strength industrial polyester fiber and a preparation method thereof. The high-strength industrial polyester fiber comprises a PET (polyethylene terephthalate) matrix with the intrinsic viscosity of 0.8-1.2dl/g and a compound in a compound having a formula (I) dispersed in the PET matrix, wherein the general structural formula of the compound in the formula (I) is Tix(OR<1>O)y(OOC6H4COO)zH4. According to the preparation method of the high-strength industrial polyester fiber, composite resin is obtained by adopting a melt blending method, a melt blending-solid phase tackifying method or in-situ polymerization-solid phase tackifying method, and then the high-strength industrial polyester fiber is formed. According to the technical scheme, the orientation of the nanometer material with a laminated structure is introduced into the PET matrix in the production process, so as to induce the orientation of a PET molecule chain, so that the mechanical property can be improved, the amount of the additive added is less, the cost is low, and market prospects are wide.

Description

technical field [0001] The invention belongs to the field of polyester fibers, and in particular relates to a high-strength industrial polyester fiber and a preparation method thereof. Background technique [0002] Since polyester and polyester fiber entered large-scale industrialization in the 1970s, no matter the technical level or the production variety, its development speed is much faster than that of other synthetic materials and synthetic fibers. [0003] Polyester fiber is polyethylene terephthalate (PET) fiber, and there are two main categories: civil fiber and industrial fiber. Generally, the ratio of industrial fibers to civilian fibers requires high strength and high modulus. The breaking strength of industrial fibers generally needs to be above 7.8cN / dtex, and the elongation at break is 12±2%. The strength of polyester fibers varies with polyester chips. The intrinsic viscosity of civil fiber is about 0.64dl / g, and the intrinsic viscosity of industrial polyeste...

Claims

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Application Information

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IPC IPC(8): D01F6/92D01F1/10C08J3/22C08L67/02C08G63/183
Inventor 孙宾朱美芳陈龙李薇薇邓峰牛永杰
Owner DONGHUA UNIV
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