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A kind of degradable composite material prepreg and its preparation method and device

A composite material and prepreg technology, applied in textiles and papermaking, physical treatment, fiber treatment, etc., can solve the problems of unsuitable production of natural fiber reinforced PLA, inability to form reinforced prepreg tape, and degradation of PLA mechanical properties, and achieve Good self-extinguishing property, less environmental hazards, and the effect of ensuring safety and environmental performance

Active Publication Date: 2016-09-28
SHANGHAI GENIUS ADVANCED MATERIAL (GRP) CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The products produced by this method can fully adjust the content of reinforcing fibers, but this method is extruded and pelletized to form short-cut pellets, which cannot form continuous reinforced prepreg tapes
And this method is not suitable for the production of natural fiber reinforced PLA
First of all, PLA is easy to degrade. After a spinning process, the mechanical properties of PLA will decrease. After another heating process, the degradation of PLA is obvious. Secondly, natural fibers are different from glass fibers. Glass fibers are artificial fibers, which can effectively improve the length of the fibers. , but natural fibers must be twisted to form effective continuous

Method used

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  • A kind of degradable composite material prepreg and its preparation method and device
  • A kind of degradable composite material prepreg and its preparation method and device
  • A kind of degradable composite material prepreg and its preparation method and device

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0056] A kind of preparation method of degradable composite material prepreg, this preparation method comprises the following steps:

[0057] 70 parts of PLA resin, 5 parts of dilauryl thiodipropionate, 10 parts of polyhydroxyalkanoate, 3 parts of bis(2,2,6,6-tetramethyl-4-piperidinyl) sebacate Parts, 5 parts of polyethylene glycol, 5 parts of zinc borate, 1 part of isooctyl 3-mercaptopropionate, 1 part of 4,4-dimethyl-2,4-diphenyl-1-butene in the mixer Mixed in medium for 7 minutes, fully mixed and then added to a twin-screw extruder to extrude and pelletize. The screw speed is 80r / min, and the extrusion temperature is 205°C to obtain a modified PLA resin; the performance test results are shown in Table 1.

[0058] With 120 rolls of jute fiber after plasma treatment, untwisting through untwisting machine, the form of loose expansion occurs, and the jute fiber after untwisting is processed through each step in embodiment 1, wherein in the coating extruder The extruded resin i...

Embodiment 2

[0060] A kind of preparation method of degradable composite material prepreg, this preparation method comprises the following steps:

[0061] Take 82 parts of PLA resin, 4 parts of phenylene diisodecyl phosphite, 7 parts of polyethylene glycol, 2 parts of 2-(2'-hydroxy-5'-)benzotriazole, 2 parts of aluminum hydroxide, 3 parts of magnesium were mixed in a mixer for 4 minutes, then added to a twin-screw extruder after mixing, extruded and granulated, the screw speed was 75r / min, and the extruder head temperature was 190°C.

[0062] 80 volumes of flax fibers after plasma treatment are untwisted by an untwisting machine, and a loose and expanded form appears, and the flax fibers after untwisting are processed through the steps in Example 1, wherein in the coating extruder The extruded resin is the above-mentioned modified PLA resin, and its extrusion temperature is 210°C. The natural fiber and PLA are impregnated on both sides, cooled, and rolled up to prepare a fully degradable ...

Embodiment 3

[0064] A kind of preparation method of degradable composite material prepreg, this preparation method comprises the following steps:

[0065] Get 85 parts of PLA resin, 1 part of dilauryl thiodipropionate, 2 parts of polyhydroxyalkanoate (PHA), 1 part of 2,4-dihydroxy-benzophenone, 2 parts of decabromodiphenylethane, 3 parts of hexabromocyclododecane, 5 parts of silicone oil, 1 part of 4-diphenyl-4-methyl-1-pentene, mixed in the raw material mixer for 6 minutes, mixed and added to the twin-screw extruder , extrusion granulation, the screw speed is 75r / min, and the extruder head temperature is 190°C. In the present embodiment, 150 rolls of jute fiber through alkali treatment are taken through the untwisting machine 1 to untwist, and the natural fiber 3 after untwisting, which is the jute fiber here, is placed on the natural fiber arrangement device 2 and passed through the natural fiber After the direction control 4, enter the natural fiber pressing roller 5, 5', then pass thr...

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Abstract

The invention relates to a biodegradable composite prepreg cloth, and a preparation method and a device for the same. The composite prepreg cloth comprises a modified polylactic acid (PLA) resin accounting for 40-70 wt% of the composite prepreg and natural fiber. The preparation method comprises the following steps: conducting a continuous drying treatment on natural fiber; immersing the fiber with molten modified PLA; coating the modified PLA on the surface of the natural fiber; and rolling, cooling and winding to obtain the prepreg cloth. The device comprises an untwisting machine, an arrangement warping device, a direction control device, a friction roll, a tenslator, a film extruder, a gum dipping cooling device, and a winding device. Compared with the prior art, the invention has the advantages of large fiber draw ratio, obvious PLA enhancement effect, small wear of the extruder screw, simple process, energy saving and environment-friendliness.

Description

technical field [0001] The invention relates to a polymer composite material and its preparation method and device, in particular to a degradable composite material prepreg and its preparation method and device. Background technique [0002] Polylactic acid (PLA) does not exist in nature. It is polymerized from lactic acid obtained after fermentation of corn and potatoes. Polylactic acid has good biodegradability and can gradually degrade in the natural environment to generate water and carbon dioxide. The degradation process will not cause secondary pollution to the environment; and with the reduction of oil content, various products produced with oil as the main raw material The price of this kind of polymer raw material is constantly rising, and the price of PLA, which has a faster circulation rate, will become lower and lower with the development of production technology and technological progress, and its role as a substitute for petroleum products will become more and ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): D06N7/06C08L67/04C08L71/08C08K13/02C08K5/372C08K3/38C08K5/526C08K5/03C08K5/32D06M10/00D06M11/00D06M13/00
Inventor 刘密密
Owner SHANGHAI GENIUS ADVANCED MATERIAL (GRP) CO LTD
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