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Thermoplastic composite preimpregnation body plate

A composite material and thermoplastic polymer technology, applied in the field of thermoplastic composite material prepreg sheet, can solve the problems of high polymer melt viscosity, difficult mold preheating, long product forming time, etc., and achieve tensile strength and anti-deformation. Performance improvement, solving the problem of effective impregnation, and the effect of convenient impregnation treatment

Inactive Publication Date: 2014-03-05
南京彤天广元高分子材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Mixing plastic powder in the fiber bundle, the impregnation effect is not good due to the influence of the powder size and the ability of the powder to soak into the fiber bundle
[0007] 4. Mixed fiber yarn is also called composite yarn impregnation technology: plastic fiber and glass fiber are dry-mixed and pre-impregnated, and pre-heating outside the mold is difficult. If the pre-heating temperature is too high, the plastic fiber will melt and shrink. If the pre-heating temperature is too low, The product molding time is too long and the production cost is high
[0008] The solution impregnation technology has not become the mainstream technology due to the use of more solvents; the powder impregnation technology has not been widely used due to the poor impregnation effect; Melting shrinkage changes its original good dispersibility, and under pressure, the heat transfer of mixed fiber yarn becomes a problem, so it has not been widely used
The current mainstream technology is melt impregnation technology, the viscosity of polymer melt is high, and the impregnation efficiency is low
[0009] None of the existing technologies can solve the problem of high-efficiency and effective impregnation of thermoplastic polymers on reinforced fiber fabrics (that is, to ensure that the reinforced fiber bundles pass the siphon test after impregnation), and there are special requirements for reinforced fibers and polymers, and the adaptability is not strong

Method used

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  • Thermoplastic composite preimpregnation body plate
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  • Thermoplastic composite preimpregnation body plate

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0052] Polyurethane emulsion (emulsion is a fine particle, very stable water dispersion) produced by Shandong Aodemei Polymer Material Co., Ltd., ADM-F269D500.2 microns, mixed with water to prepare a solid content of 11% (wt), the fabric is carbon fiber single Xiang cloth, gram weight 200 grams / square meter, carbon fiber is Toray T70012K fiber with a diameter of 7 microns, soak the fabric in the emulsion, drain the excess emulsion, place it on the metal mesh, and place it in an oven at 180°C for 20 minutes. Remove from the oven and cool to room temperature. The prepreg contained 10.3% polymer, and the carbon fiber bundles passed the siphon test after immersion.

[0053] The prepregs of Example 1 to Example 7 and Comparative Example 1 are shown in Table 1:

[0054] Table 1

[0055]

[0056]

[0057]

[0058] The gel content of the prepreg in Table 1 refers to the content of the thermoplastic polymer after the prepreg is impregnated with an aqueous dispersion of the thermoplastic pol...

Embodiment 2

[0060] Preparation method of polypropylene wax water dispersion used:

[0061] Mix and disperse the following materials evenly:

[0062] 100 grams of polypropylene wax Nanjing Tianshi Experimental Micron Powder Co., Ltd. PPW0902 (melting point: 145°C, particle size: D50: 10 microns)

[0063] 2.5 grams of castor oil twenty carbon polyoxyethylene ether EL-20 Jiangsu Haian Petrochemical Plant

[0064] 3 grams of allyl branched alcohol ten-carbon polyoxyethylene ether APEG-1000 Jiangsu Haian Petrochemical Plant

[0065] 10 g methyl methacrylate

[0066] 10 g dibutyl maleate

[0067] 0.2 g dibenzoyl peroxide

[0068] 0.2 g azobisisobutyronitrile

[0069] 200g water

[0070] Stir the mixture in a four-necked reaction flask equipped with a stirrer, a condenser and a thermometer for 1 hour, then increase the temperature to 95°C for constant temperature reaction for 5 hours, and then lower the temperature to 45°C. Grind the materials in a grinder for 5 hours to obtain the finished product. After tes...

Embodiment 3

[0072] Preparation method of water dispersion:

[0073] The material ratio is:

[0074] 100 grams of KT-1 powder (maleic anhydride modified polypropylene D50: 14 microns)

[0075] 6 grams acrylic

[0076] 5 grams baking soda

[0077] 0.5 g benzoyl peroxide

[0078] 1.3 grams of azobisisobutyronitrile

[0079] 10 g hydroxyethyl acrylate

[0080] 19 grams of styrene

[0081] 230 g water

[0082] Put the above materials directly into the container of the basket sand mill, continue to disperse for 1 hour, then grind, heat up to 95°C for 6 hours at constant temperature, and cool to 45°C to obtain the finished product and discharge.

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Abstract

The invention discloses a thermoplastic composite preimpregnation body plate, which is prepared by a thermoplastic composite preimpregnation body or is compounded by the thermoplastic composite preimpregnation body and thermoplastic polymer through hot melting. The thermoplastic composite preimpregnation body is prepared by steps of steeping fabric prepared by reinforced fibers in thermoplastic polymer aqueous dispersion, drying and dehydrating, melting the polymer, cooling and shaping, and the length of the reinforced fibers is more than 2cm. According to the preparation method of the thermoplastic composite preimpregnation body, an organic solvent is not used, water is taken as a dispersion medium, the aqueous dispersion of polymer substitutes for the organic solvent, so that the preparation method is environment-friendly; the aqueous dispersion used by the preparation method has low viscosity and is beneficial to steeping of the polymer on fiber bundles, the immersion treatment is convenient, the production efficiency is high, the production cost is low, and the problem of effectively steeping the reinforced fiber fabric by the thermoplastic polymer is solved; compared with the composite board prepared by the prior art, the preimpregnation body plate is sharply improved in tensile strength and deformation performance.

Description

Technical field [0001] The invention relates to a thermoplastic composite material prepreg board. Background technique [0002] Polymer composite materials have played an increasingly important role in the development of society and economy. Thermoset composite materials have developed maturely in our country. However, there are still many technical and cost problems due to the recycling of thermoset composite materials. Recycling economy is being promoted day by day, environmental protection pressure is increasing, and the easily recyclable thermoplastic composite material (FRTP) has been paid more and more attention. [0003] Thermoplastic composite material (FRTP) was originally a form of staple fiber reinforcement, and the length of the fiber in the composite material was very short, less than 1mm. In the LFT (Long Fiber Process) developed later, the fiber length is not more than 3mm, and the fiber reinforcement effect is not fully utilized. Obviously, under the same condition...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08J5/24C08J5/04C08L75/04C08L51/06C08L25/14B32B27/04
Inventor 夏涛汪辉黄欣王健
Owner 南京彤天广元高分子材料有限公司
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