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Preparation method for wide thermoplastic prepreg and hot compression rolls for preparing same

A prepreg, hot pressing roller technology, applied in the coating and other directions, can solve the problems of low operating temperature, complicated preparation method, and large fiber damage of hot pressing rollers, and achieves less fiber damage, uniform resin distribution, and prepreg. The effect of stable glue content

Active Publication Date: 2017-01-04
SHAANXI TIANCE NEW MATERIAL TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The technical problem to be solved by the present invention is to provide a method for preparing a wide-width thermoplastic prepreg and a hot press roll for its preparation in view of the above-mentioned deficiencies in the prior art, which solves the problem that the existing preparation method is complicated, and the conventional melt impregnation method is difficult for fibers. Large damage, low operating temperature of hot pressing roller, large deflection and deformation under high temperature conditions

Method used

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  • Preparation method for wide thermoplastic prepreg and hot compression rolls for preparing same
  • Preparation method for wide thermoplastic prepreg and hot compression rolls for preparing same
  • Preparation method for wide thermoplastic prepreg and hot compression rolls for preparing same

Examples

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Comparison scheme
Effect test

preparation example Construction

[0029] see figure 1 Shown, a kind of wide width thermoplastic prepreg preparation method of the present invention comprises the following steps:

[0030] S1: pre-install 1-2m fiber cloth on the sand frame 1, and the fiber cloth enters the pre-tension roller 4 through the rinse nozzle 2 and the dryer 3 in turn, and fixes and pre-tensions the fiber cloth;

[0031] S2: The resin extruded by the extrusion die 10 is calendered between the film preparation roll 5 and the hot pressing roll 6 to obtain a resin film with a predetermined thickness and width;

[0032] S3: Adhere the resin film prepared in step S2 to the surface of the hot pressing roller 6, enter the impregnation stage and impregnate the fiber cloth on the pretension roller 4 in step S1, and pass through the cooling positioning roller 7 equipped with deionized water after the impregnation is completed Cooling, trimming by trimmer 8, and finally winding by winder 9 to obtain the required prepreg.

[0033] Specifically: ...

Embodiment 1

[0056] The glass fiber is made of continuous unidirectional glass fiber, and the polyphenylene sulfide is made of low-viscosity polyphenylene sulfide pure material. Spray and wash the fiber cloth with methyl ethyl ketone to remove impurities, bake the fiber with infrared light to remove solvent, set the line speed in the whole set of equipment to 0.5m / s, and set the temperature of film preparation roller 5 and hot pressing roller 6 to 330 ℃, the cooling water flow rate in the hollow shaft of the hot pressing roller 6 is 8L / min, the gap between the film preparation roller 5 and the hot pressing roller 6 is set to 0.051mm, the pressure between the hot pressing rollers is set to 15MPa, and the positioning roller is cooled The flow rate of deionized water in 7 is 15L / min. A prepreg with a glue content of 60% and a good impregnation effect can be prepared. The performance of this prepreg is tested according to GB / T1463-2005, GB 1447-2005 and GB 1449-2005, and compared with the per...

Embodiment 2

[0066] The prepreg is prepared by using the hot pressing roller of the present invention. When the hot pressing roller needs to be heated to a certain temperature, the heating power supply and the cooling water system of the hollow shaft are turned on in turn. The electric heating wire located in the heating tank 6-3 generates heat, which is conducted to the surface of the hot pressing roller body 1. Since the heating tank 6-3 is evenly distributed in the circumferential direction, it can effectively ensure the uniformity of the surface temperature of the hot pressing roller body 6-1. sex. When the hot pressing roller 6-1 reaches the predetermined temperature, the prepreg is prepared, and the force applied to the surface of the hot pressing roller is evenly transmitted to the reinforcing plate 6-6 and the end baffle 6-4, and then transmitted to the hollow rotating shaft 6- 10. In the temperature range of 300-400°C, the compression deformation of the steel is very small and wi...

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Abstract

The invention discloses a preparation method for a wide thermoplastic prepreg and hot compression rolls for preparing the same. Each of the hot compression rolls comprises a hot compression roll body and a hollow rotating shaft sleeving the same, wherein a hot compression roll heating layer is arranged on the inner surface of the hot compression roll body; end baffle plates for fixedly connecting the hot compression roll body and the hot compression roll heating layer are arranged at two ends of the hollow rotating shaft; an inner sealed space is formed by virtue of the two end baffle plates; a vacuum opening is formed in each of the end baffle plates, a reinforcing plate is arranged between the hollow rotating shaft and the hot compression roll heating layer, and a plurality of round lightening holes are uniformly formed in the reinforcing plate. The preparation method disclosed by the invention combining the advantages of a melting method and a film method prepreg preparation method is high in continuity, high in method realizability, and high in energy consumption utilization ratio; the damage of fibers is little, the preparation method is easy to industrialize, and the quality of the prepreg is excellent; by adopting the special hot compression rolls, the structural stability of the hot compression rolls in a wide pre-impregnating preparation process is guaranteed, and the quality of the prepreg is not affected.

Description

【Technical field】 [0001] The invention belongs to the technical field of thermoplastic composite material prepreg preparation, and in particular relates to a preparation method of wide-width thermoplastic prepreg working under high temperature conditions and a hot pressing roller for preparation thereof. 【Background technique】 [0002] The preparation technologies of thermoplastic composite prepreg mainly include solvent method, powder method, film method and melt impregnation method, among which melt impregnation method is considered to be the most likely to realize industrial production method. In the existing melt-melt prepreg preparation method, due to the radial shear between the fiber and the resin solution, the impregnation effect is not ideal, and it is easy to cause fiber damage, and in the high temperature range of 300-400 ° C, the hot press roll is easy to Deformation, although the quality of the prepreg is guaranteed, the film needs to be prepared in advance, the...

Claims

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Application Information

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IPC IPC(8): B29B15/12
CPCB29B15/12
Inventor 杨泽诚聂挺张鸿翔江汛马洋洋殷武雄
Owner SHAANXI TIANCE NEW MATERIAL TECH
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