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Preparation method of blend fiber-reinforced polycaprolactone composite material of polycaprolactone/full-degraded natural fiber

A technology of polycaprolactone and composite materials, which is applied in cellulose/protein conjugated rayon filament, conjugated synthetic polymer rayon filament, melt spinning and other directions, can solve problems such as hidden dangers of health and safety, cumbersome process, etc. Achieve the effect of improving performance, avoiding agglomeration and ensuring safety

Inactive Publication Date: 2014-01-22
NINGXIA GREEN BIODEGRADABLE PROD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

There is no doubt that such methods require the use of special equipment, and the process is also very cumbersome; especially some coupling reagents used in the manufacture of food-contact materials have hidden health and safety risks. Under the background of China’s efforts to promote food safety more cautious use

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] Embodiment 1 Preparation of composite material of the present invention

[0026] (1) The polycaprolactone resin was vacuum-dried at 45°C for 10 hours to remove moisture.

[0027] (2) The ramie fiber and polycaprolactone were melt spun and cut into short fibers at a mass ratio of 0.5:1. The processing temperature was 170°C. The obtained blended fiber had a diameter of 0.5 mm and a fiber length of 25 mm.

[0028] (3) Blend the resulting blended fiber and polycaprolactone at a mass ratio of 3:7, and add β-(3,5-di-tert-butyl-4-hydroxyphenyl)propionic acid accounting for 0.2% of the total amount of the substance N-octadecanyl alcohol ester is then extruded into strands in a twin-screw extruder at an extrusion temperature of 170° C. and a screw speed of 200 rpm. The product is cooled, pelletized and dried to obtain polycaprolactone / ramie fiber blended fiber reinforced polycaprolactone composite material.

Embodiment 2

[0029] Embodiment 2 Preparation of composite material of the present invention

[0030] (1) The polycaprolactone resin was vacuum-dried at 45°C for 10 hours to remove moisture.

[0031] (2) Bamboo fiber and polycaprolactone were melt-spun at a mass ratio of 1:1, and the processing temperature was 180°C. The obtained blended fiber had a diameter of 1 mm and a fiber length of 50 mm.

[0032] (3) Blend the resulting blended fiber and polycaprolactone at a mass ratio of 5:5, and add β-(3,5-di-tert-butyl-4-hydroxyphenyl)propionic acid accounting for 0.1% of the total amount of the substance N-octadecyl alcohol ester, 0.2% tris (2.4-di-tert-butylphenyl) phosphite, and then extrude the strands in a twin-screw extruder, the extrusion temperature is 180 ° C, and the screw speed is 120 rpm. The product is cooled, pelletized and dried to obtain polycaprolactone / bamboo fiber blended fiber reinforced polycaprolactone composite material.

Embodiment 3

[0033] Embodiment 3 Preparation of composite material of the present invention

[0034] (1) The polycaprolactone resin was vacuum-dried at 45°C for 10 hours to remove moisture.

[0035] (2) Cotton fiber and polycaprolactone were melt-spun at a mass ratio of 1:1, the processing temperature was 170°C, and the aspect ratio of the obtained blended fiber was 15:1.

[0036] (3) Blend the obtained blended fiber and polycaprolactone at a mass ratio of 1:3, add vitamin E accounting for 0.1% of the total amount of substances, and then perform blending and extrusion in a twin-screw extruder. The extrusion temperature 180°C, screw speed 150rpm. The product is cooled, pelletized and dried to obtain polycaprolactone / cotton fiber blended fiber reinforced polycaprolactone composite material.

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Abstract

The invention provides a full-degraded polycaprolactone composite material which is prepared from the following raw materials in parts by weight: 1-9 parts of blend fiber, and 1-9 parts of polycaprolactone, wherein an antioxidant accounts for 0.1-1% of total mass of the raw materials; the blend fiber is prepared from a natural fiber and the polycaprolactone, of which the ratio is (0.5-1):(1-1) w / w in a melt spinning manner; the draw ratio of the blend fiber is (5-100):1. By adopting the full-degraded polycaprolactone composite material, the natural fiber and the polycaprolactone are creatively blended, melted, spun and cut, and then blend fiber staples and the polycaprolactone are blended to pelletize. Thus, not only is the dispersity of the fiber in the polycaprolactone greatly improved, but also aggregation clustering of the fiber inside polycaprolactone matrix is effectively avoided; the enhancement effect of the fiber is fully developed; the performance of the composite material is obviously improved; furthermore, other chemicals are not introduced to the technology disclosed by the invention; the safety of the product is ensured.

Description

technical field [0001] The invention relates to a preparation method of fully degradable natural fiber blended fiber reinforced polycaprolactone composite material. Background technique [0002] With the enhancement of people's awareness of environmental protection, biodegradable polymer materials, especially aliphatic polyester, have attracted more and more attention. Polycaprolactone is a thermoplastic semi-crystalline linear polymer obtained by ring-opening polymerization of caprolactone. Aliphatic polyester synthetic polymer material has good flexibility and processability, and is a good biodegradable material. As a plastic material, polycaprolactone has the main disadvantages of low melting temperature and poor heat resistance of the product. The thermal deformation temperature of the product is only about 60°C, which is very unfavorable for its application in more aspects. [0003] The disadvantage of poor heat resistance of polycaprolactone can be improved by blendin...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L67/04C08L1/02C08J5/04D01F8/14D01F8/02D01D5/08
Inventor 杨建军
Owner NINGXIA GREEN BIODEGRADABLE PROD
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