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Degradable fibers with good resilience and preparation method thereof

A technology for degrading fiber and resilience, which is applied in the field of degradable fiber and its preparation. It can solve problems such as difficult stretching, narrow spinning temperature range, and yield stress of nascent fiber, and achieves improved post-stretch performance and good biodegradability. , good resilience effect

Inactive Publication Date: 2012-07-18
DALIAN POLYTECHNIC UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The method provided by the invention can effectively solve the problems of the narrow spinning temperature range of P(3HB-co-4HB), and because of the post-crystallization effect, the yield stress of the primary fiber is difficult to stretch, etc.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] ① Vacuum-dry EVA (14% VAC) and P(3HB-co-4HB) at 70°C and 90°C for 8h and 30h, respectively, and control the moisture content of the slices to less than 0.01wt.% and 0.005wt.%, respectively.

[0033] ②Mix the dried EVA and P(3HB-co-4HB) slices at a mass ratio of 3:100, and add 1 part (based on 100 parts of P(3HB-co-4HB)) of dicumyl peroxide and A mixture of chain extenders, wherein the mass ratio of dicumyl peroxide to chain extenders is 1:14.

[0034] The chain extender used in this embodiment is produced by BASF Brand ADR 4300 chain extender, containing 5 epoxy reactive groups.

[0035] ③The above three are fully mixed and sent to the pre-spinning hopper, plasticized and melted in the screw extruder at 130°C-150°C, and extruded at 140°C at a speed of 15m / min from the hole diameter of 0.3mm, the hole Extrude from a spinneret with a length of 0.55 mm, and wind the extruded filaments at a winding speed of 200 m / min to obtain primary fibers after being air-cooled with a...

Embodiment 2

[0040] ① same as embodiment 1

[0041] ②Mix the dried EVA and P(3HB-co-4HB) slices at a mass ratio of 3:100, and add 2 parts (based on 100 parts of P(3HB-co-4HB)) of dicumyl peroxide and A mixture of chain extenders, wherein the mass ratio of dicumyl peroxide to the chain extender is 1:15.

[0042] The chain extender used in this embodiment is produced by BASF Brand ADR 4300 chain extender, containing 5 epoxy reactive groups.

[0043] ③The above three are fully mixed and sent to the pre-spinning hopper, plasticized and melted at 130°C-150°C in the screw extruder, and extruded at 135°C at a speed of 15m / min from a hole diameter of 0.3mm, the hole Extrude from a spinneret with a length of 0.55 mm, and wind the extruded filaments at a winding speed of 300 m / min to obtain primary fibers after being air-cooled with a length of 1 m.

[0044] ④The as-spun fibers were equilibrated for 24 hours at 20°C±2, 65±5% relative humidity. Then stretch 10 times in a 70°C water bath, perform...

Embodiment 3

[0047] ① same as embodiment 1

[0048]②Mix the dried EVA and P(3HB-co-4HB) slices at a mass ratio of 10:100, and add 2 parts (based on 100 parts of P(3HB-co-4HB)) of dicumyl peroxide and A mixture of chain extenders, wherein the mass ratio of dicumyl peroxide to chain extender is 1:10.

[0049] The chain extender used in this embodiment is produced by BASF Brand ADR-4368C / CS chain extender, containing 9 epoxy active groups.

[0050] ③The above three are fully mixed and sent to the pre-spinning hopper, plasticized and melted in the screw extruder at 130°C-150°C, and extruded at 130°C at a speed of 5m / min from a hole diameter of 0.3mm, the hole Extrude from a spinneret with a length of 0.55 mm, and wind the extruded filaments at a winding speed of 200 m / min to obtain primary fibers after being air-cooled with a length of 1 m.

[0051] ④The as-spun fibers were equilibrated for 24 hours at 20°C±2, 65±5% relative humidity. Then stretch 8 times in a water bath at 65°C, perform ...

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Abstract

The invention discloses a method for preparing degradable fibers with good resilience. The method comprises the following steps of: mixing components A, B and C in a mass ratio of 100:(1.5-10):(0.5-2.5), spinning by using melt spinning and coiling equipment to obtain primary fibers, and balancing, drawing and shaping to obtain blend fibers; and balancing the blend fibers again to obtain the target fibers. The fibers prepared by the method are biomass polyester-based elastic fibers, and a main component P(3HB-co-4HB) has high biocompatibility and biodegradability and is sourced from biofermentation but not petroleum, so that the fibers are green sustainable environment-friendly fibers. The elastic fibers are prepared by a melting spinning technology, non polyurethane fibers are prepared by a solution spinning technology, and organic solvents are not used in the production process to avoid environmental pollution.

Description

technical field [0001] The invention relates to a degradable fiber with good resilience and a preparation method thereof, belonging to the technical field of differential fiber production. Background technique [0002] Poly 3-hydroxybutyrate 4-hydroxybutyrate [P(3HB-co-4HB)] is a kind of biomass polyester, which is generally prepared by biological fermentation. Because of its good biocompatibility and complete degradability, it can be used to make environmentally friendly films, plastic containers, plastic coatings, and can also be used to prepare fibers for absorbable surgical sutures, etc. By adjusting the 4HB content in P(3HB-co-4HB), P(3HB-co-4HB) products with lower melting temperature and crystallinity, better processability and thermal stability can be obtained. Since P(3HB-co-4HB) contains water-sensitive ester groups and is prone to post-crystallization, its spinning and forming has always been very difficult. The main performances are (1) the spinning temperature ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D01F6/92D01F11/08D01D5/08D01D5/14D01D10/02
Inventor 郭静胡成女
Owner DALIAN POLYTECHNIC UNIVERSITY
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