Preparation method of PBAT short fiber

A technology of short fiber and masterbatch, applied in the field of biodegradable fiber materials, can solve the problems of fiber adhesion, difficult continuous and stable forming, etc., and achieve the effect of improving crystallization speed, improving spinnability, and optimizing process parameters.

Active Publication Date: 2022-07-08
浙江安顺化纤有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The present invention aims to overcome the problem that PBAT tends to cause fiber adhesion in the spinning process and is difficult to form continuously and stably in the prior art, and provides a method for preparing PBAT short fibers. , which improves the spinning stability of PBAT fiber and realizes high-speed continuous spinning

Method used

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  • Preparation method of PBAT short fiber

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preparation example Construction

[0034] A preparation method of PBAT staple fiber, comprising the steps:

[0035] (1) Preparation of antibacterial PBAT masterbatch: the PBAT masterbatch and the antibacterial agent are mixed uniformly in a mass ratio of 97~100:0.3~3, and the antibacterial PBAT masterbatch is obtained after melt extrusion, water cooling and pelletizing through a twin-screw extruder, The temperature of each zone of the twin-screw extruder is:

[0036] Each area of ​​the screw temperature(℃) a district 100-150 Second District 160-210 Third District 180-240 Four districts 180-240 District 5 180-240 District VI 180-240 District Seven 180-240 eight districts 180-240 nine districts 180-240 District 10 180-240 die 180-240

[0037] (2) Drying of raw materials: After drying PBAT masterbatch and antibacterial PBAT masterbatch at 65-75°C for 3-5 hours, they are used as core material and skin material respectively;

[0038] (...

Embodiment 1

[0048] A preparation method of PBAT staple fiber, comprising the steps:

[0049] (1) Preparation of antibacterial PBAT masterbatch: Mix the PBAT masterbatch and the antibacterial agent uniformly at a mass ratio of 98:1, melt extrusion, water cooling, and pelletize through a twin-screw extruder to obtain an antibacterial PBAT masterbatch, and twin-screw extrusion. The temperature of each zone of the machine is: 120°C for the first zone, 180°C for the second zone, 220°C for the third zone, 220°C for the fourth zone, 220°C for the fifth zone, 220°C for the sixth zone, 220°C for the seventh zone, 220°C for the eighth zone, and 220°C for the ninth zone. Ten zone 220℃, die head 220℃;

[0050] (2) Drying of raw materials: After drying the PBAT masterbatch and the antibacterial PBAT masterbatch at 70°C for 4 hours, they were used as the core layer material and the skin layer material respectively;

[0051] (3) Pre-spinning: After the core layer material and the skin layer material ar...

Embodiment 2

[0058] A preparation method of PBAT staple fiber, comprising the steps:

[0059] (1) Preparation of antibacterial PBAT masterbatch: Mix the PBAT masterbatch and the antibacterial agent uniformly at a mass ratio of 97:0.3, melt extrusion, water cooling and pelletizing through a twin-screw extruder to obtain an antibacterial PBAT masterbatch, and twin-screw extrusion The temperature of each zone of the machine is: 100°C in the first zone, 160°C in the second zone, 180°C in the third zone, 200°C in the fourth zone, 200°C in the fifth zone, 200°C in the sixth zone, 200°C in the seventh zone, 220°C in the eighth zone, and 220°C in the ninth zone. Ten zone 220℃, die head 220℃;

[0060] (2) Drying of raw materials: After drying the PBAT masterbatch and the antibacterial PBAT masterbatch at 65°C for 5 hours, they were used as the core layer material and the skin layer material respectively;

[0061] (3) Pre-spinning: After the core layer material and the skin layer material are melte...

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Abstract

The invention discloses a preparation method of a PBAT short fiber. The preparation method comprises the following steps: (1) preparing an antibacterial PBAT master batch: uniformly mixing the PBAT master batch with an antibacterial agent, and carrying out melt extrusion, water cooling and grain-sized dicing to obtain the antibacterial PBAT master batch; the antibacterial agent is porous nano zinc oxide loaded with sodium benzoate; (2) drying the raw materials: drying the PBAT master batch and the antibacterial PBAT master batch, and respectively taking the PBAT master batch and the antibacterial PBAT master batch as a core layer material and a skin layer material; (3) fore-spinning: after respectively melting and extruding the core layer material and the skin layer material, performing extrusion molding through a skin-core type composite spinning assembly, and performing circular blowing cooling and winding treatment; and (4) post-spinning: oiling the wound fibers, drafting, and cutting to obtain the PBAT staple fibers. The spinning stability of the PBAT fiber is improved and high-speed continuous spinning is realized by regulating and controlling the fiber components and the process in the spinning process.

Description

technical field [0001] The invention relates to the field of biodegradable fiber materials, in particular to a preparation method of PBAT staple fibers. Background technique [0002] Poly(butylene adipic acid / terephthalate) (PBAT) is a ternary copolyester polymerized from terephthalic acid, adipic acid and 1,4-butanediol. More of a new type of biodegradable material. PBAT contains flexible aliphatic chains and rigid aromatic bonds, so it has high toughness and high temperature resistance, and due to the presence of aliphatic ester bonds, it is biodegradable. [0003] As a degradable material with excellent performance, PBAT can also be used in the field of textile materials. However, during the spinning process of PBAT, due to the low crystallinity of primary fibers, low glass transition temperature, and slow crystallization speed, the fibers are difficult to form continuously and stably. Therefore, in the prior art, it is generally necessary to blend PBAT with other poly...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D01F8/14D01F1/10
CPCD01F8/14D01F1/103Y02W90/10
Inventor 李耿裕秦治平欧晢文
Owner 浙江安顺化纤有限公司
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