Preparation method of modified polypropylene resin for superfine-denier dyeable polypropylene fiber

A technology of polypropylene resin and ultrafine denier, which is applied in the field of preparation of modified polypropylene resin for dyeable polypropylene with ultrafine denier, which can solve the problems of spinning performance, mechanical property decline, failure to produce normal mechanical properties, and no application value, etc. Problems, achieve the effect of improving spinning processing performance, improving dispersion effect, and improving thermal stability

Active Publication Date: 2013-11-06
ZHEJIANG SCI-TECH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The dyeable polypropylene resin patents disclosed above mainly meet the conventional technical route to prepare dyeable fine-denier polypropylene, and generally the single-filament fineness is greater than 0.5dtex. If you want to produce dyeable fine-denier polypropylene with a smaller single-filament Problems such as dispersibility in the polypropylene base material greatly reduce the spinning performance and mechanical properties, and even cannot be produced normally or the mechanical properties are too poor to have application value

Method used

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  • Preparation method of modified polypropylene resin for superfine-denier dyeable polypropylene fiber

Examples

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Embodiment 1

[0018] The preparation method of a modified polypropylene resin for ultra-fine denier dyeable polypropylene in this embodiment includes the following steps: 1) Firstly, through the method of combining melt polycondensation and solid-state polycondensation, using terephthalic acid and ethylene glycol as the Raw materials, the molar ratio of terephthalic acid to ethylene glycol is 1:1.2; add 30% of the molar percentage of terephthalic acid and 30% of the molar percentage of terephthalic acid 1,4-butanediol , through the method of melt polycondensation, a copolyester with a melting point of 180°C and an intrinsic viscosity of 0.4dl / g was obtained; then, the copolyester was subjected to solid-state polycondensation at 170°C and a vacuum of less than 1kpa for 36 hours to obtain Copolyester with an intrinsic viscosity of 0.8dl / g and a melting point of 180°C. 2) Then, the copolyester additive with an intrinsic viscosity of 0.8dl / g prepared in step 1) and accounting for 5% of the tota...

Embodiment 2

[0021] The preparation steps of the present embodiment are basically the same as in Example 1, except that the copolyester with an intrinsic viscosity of 0.8dl / g accounting for 10% of the total weight percentage of the additive, compatibilizer and polypropylene resin, accounting for the additive, EPDM-g-MAH with a total weight percentage of 2% of compatibilizer and polypropylene resin and polypropylene resin with a melt index of 50g / 10min are blended and granulated at 200°C through a twin-screw extruder, and the particle size of the dispersed phase is measured is 0.92 μm. The detailed conditions and results are shown in Table 1, which is the preparation process and result display table of the dyeable modified polypropylene resin in the embodiment of the present invention.

[0022]In this example, a copolyester containing aliphatic dibasic acid and dibasic alcohol is used as an additive, which can not only reduce the melting point difference between the additive and polypropyle...

Embodiment 3

[0024] The preparation steps of the present embodiment are basically the same as in Example 1, except that the copolyester with an intrinsic viscosity of 15% of the total weight percentage of the additive, compatibilizer and polypropylene resin is 0.8dl / g, accounting for the additive, EPDM-g-MAH with a total weight percentage of 2% of compatibilizer and polypropylene resin and polypropylene resin with a melt index of 50g / 10min are blended and granulated at 220°C through a twin-screw extruder, and the particle size of the dispersed phase is measured is 0.98 μm. The detailed conditions and results are shown in Table 1, which is the preparation process and result display table of the dyeable modified polypropylene resin in the embodiment of the present invention.

[0025] In this example, a copolyester containing aliphatic dibasic acid and dibasic alcohol is used as an additive, which can not only reduce the melting point difference between the additive and polypropylene, but als...

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Abstract

The invention discloses a preparation method of modified polypropylene resin for superfine-denier dyeable polypropylene fiber. The preparation method comprises the following steps: 1) first, obtaining copolyester additives which have a melting point of 180 to 220 DEG C and intrinsic viscosity of 0.8 to 1.2dl / g and contain aliphatic dibasic acid and dihydric alcohol, through a combined method of melt polycondensation and solid phase polycondensation; 2) then, granulating the additives prepared in step 1) polyolefin elastomer grafted multi-monomer compatilizers, and high-speed spinning fine denier polypropylene resin with the melt index of 10 to 50g / 10min, in a melt blending manner in a double-screw extruder, so as to obtain dyeable polypropylene resin which has a dispersed-phase particle size less than 1 microns and is suitable for composite spinning superfine-denier polypropylene fiber. The modified polypropylene resin has high thermal stability; spun filaments are highly processable; and the additives have a good dispersion effect in polypropylene substrate, so that the dispersed-phase particle size is less than 1 micron. Therefore, dyeable polypropylene fiber for disperse dyes with fineness less than 0.2dtex can be produced.

Description

technical field [0001] The invention relates to a preparation method of modified polypropylene resin for superfine denier dyeable polypropylene fiber. It belongs to the chemical fiber field. Background technique [0002] Conventional coarse-denier polypropylene fiber feels waxy, has poor air permeability and moisture absorption, and has no polar groups on the molecular chain of conventional polypropylene, high crystallinity, and poor dyeing performance of polypropylene fiber. to a good promotion. Studies have shown that in addition to the common characteristics of ordinary fine denier fibers such as softness, skin-friendly, and elegant, the fine-denier polypropylene filaments also have good warmth, breathability, moisture conduction, hygiene, and lightness; The dyeable modification of propylene can overcome the disadvantages of the production of polypropylene stock solution dyeing method, such as insufficient color vividness and richness, which cannot be printed, and the c...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L23/10C08L67/02C08L51/06C08G63/16
Inventor 王秀华李邵波秦艳分沈金科
Owner ZHEJIANG SCI-TECH UNIV
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