A kind of preparation method of two-way shape memory fiber

A technology of memory fiber and twin-screw extruder, which is applied in the direction of fiber chemical characteristics, melt spinning method, stretch spinning method, etc., to achieve good shape recovery process, simple preparation process, and shorten the effect of crosslinking reaction time

Active Publication Date: 2021-03-30
ZHEJIANG SCI-TECH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, at present, two-way shape memory polymers are mostly thin film materials, which limits their application to a certain extent.

Method used

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  • A kind of preparation method of two-way shape memory fiber
  • A kind of preparation method of two-way shape memory fiber
  • A kind of preparation method of two-way shape memory fiber

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] (1) The quality of benzophenone, triallyl isocyanurate and EVA resin was mixed with 3g, 3g and 100g respectively and then extruded using a twin-screw extruder. The temperature of the heating zone of the extruder is set at 145, 145, 150, and 150°C, the speed of the screw host is 40rpm, the speed of the feeding rod is 30rpm, and the extrusion speed is 1m / min;

[0019] (2) The extruded melt is first drawn by the rollers installed in the ultraviolet light box, and its line speed is about 8m / min. About 10m / min, the draft ratio is about 10;

[0020] (3) The power of the ultraviolet lamp installed in this ultraviolet light box is 250W, and the length of the lamp tube is 30cm.

[0021] The physical picture of the prepared EVA fiber is as follows figure 1 Shown in (a), as can be seen from the figure, this invention can be continuously spun and the fiber diameter is uniform, figure 1 (b) is a polarizing microscope picture, from which it can be seen that the fiber diameter is 2...

Embodiment 2

[0028] (1) The quality of benzophenone, triallyl isocyanurate and EVA resin was mixed with 4g, 4g and 100g respectively and then extruded using a twin-screw extruder. The temperature of the heating zone of the extruder is set at 145, 145, 150, and 150°C, the rotation speed of the screw host is 45rpm, the rotation speed of the feeding rod is 35rpm, and the extrusion speed is 1.5m / min;

[0029] (2) The extruded melt is first drawn by the rollers installed in the ultraviolet light box, and its linear speed is about 9m / min. About 15m / min, the draft ratio is about 10;

[0030] (3) The power of the ultraviolet lamp installed in this ultraviolet light box is 1KW, and the length of the lamp tube is 40cm.

[0031] The EVA fiber obtained in this example was characterized by the same means as in Example 1, and the results showed that the two-way shape memory effect of the fiber was similar to that shown by the fiber obtained in Example 1.

Embodiment 3

[0033] (1) The quality of benzophenone, triallyl isocyanurate and EVA resin is mixed with 5g, 5g and 100g respectively and then extruded using a twin-screw extruder. The temperature of the heating zone of the extruder is set at 145, 145, 150, and 150°C, the rotation speed of the screw host is 50rpm, the rotation speed of the feeding rod is 40rpm, and the extrusion speed is 2m / min;

[0034] (2) The extruded melt is first drawn by the rollers installed in the ultraviolet light box, and its line speed is about 10m / min. About 20m / min, the draft ratio is about 10;

[0035] (3) The power of the ultraviolet lamp installed in this ultraviolet light box is 2KW, and the length of the lamp tube is 50cm.

[0036] The EVA fiber obtained in this example was characterized by the same means as in Example 1, and the results showed that the two-way shape memory effect of the fiber was similar to that shown by the fiber obtained in Example 1.

[0037] From the above three examples, it can be k...

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Abstract

The invention discloses a preparation method of a bidirectional shape memory fiber. The preparation process of the bidirectional shape memory fiber comprises the following two steps: (1) melt blending and extruding benzophenone, triallyl isocyanurate and polyethylene-vinyl acetate resin; (2) extruding The two-way shape memory fiber is obtained by the melt through secondary drawing and simultaneous UV curing. The ultraviolet curing time of the invention is short, the cost is low and the preparation process is simple. The reversible transformation temperature of the bidirectional shape memory fiber is 85-100°C, the reversible strain is within 5-15%, and the reversible shape recovery rate is kept above 95%.

Description

technical field [0001] The present invention relates to a bidirectional shape memory fiber and a preparation method thereof, in particular to a method in which the melt spinning process of the bidirectional shape memory fiber is simultaneously accompanied by ultraviolet curing, and relates to the component formula and ultraviolet curing parameters required for the preparation of the bidirectional shape memory fiber and spinning process parameters, belonging to the technical field of polymer materials. Background technique [0002] Shape memory polymer is an intelligent flexible material that can endow a temporary shape under certain external forces and external stimuli (such as temperature, light, electricity, magnetism, and solvents, etc.), and return to the original shape when it is stimulated again. The industrial application of shape memory polymer materials is currently concentrated in the fields of heat shrinkable film for packaging materials, wire and cable, heat shri...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): D01D5/08D01D5/16D01D11/00D01F1/10D01F6/46
CPCD01D5/08D01D5/16D01D11/00D01F1/10D01F6/46
Inventor 齐晓明傅雅琴董余兵朱曜峰
Owner ZHEJIANG SCI-TECH UNIV
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