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Thermoplastic prepreg prepared through continuous laminating method and method thereof
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A thermoplastic and prepreg technology, used in lamination, lamination devices, lamination auxiliary operations, etc., can solve problems such as low production efficiency, achieve the effect of small fiber damage, ensure stability, and improve product performance
Inactive Publication Date: 2016-02-24
SHAANXI TIANCE NEW MATERIAL TECH
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However, this method is intermittent production, which requires frequent mold opening and closing, and the production efficiency is low
Method used
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Embodiment 1
[0070] The selected density is 0.949g / cm 3 , A high-density polyethylene resin film matrix with a thickness of 0.0458mm and a width of 400mm, electronic grade glass fiber cloth 7628 as a continuous reinforcement material, and a control glue content of 30%;
[0071] Set the temperature of the impurity removal and dryingnozzle 3 to 150°C, and use hot air to process the raw materials;
[0072] The linear velocity of the orientation roller 4 is set to 0.99m / s, and the pressure is set to 0.4MPa;
[0073] The temperature of the preheating device 5 is set to 170°C;
[0074] The linear velocity of the continuous laminating device 6 is 1m / s, the initial pressure is set to 0.8MPa, the pressure gradient is set to 0MPa / m, the initial temperature is set to 230°C, the heating and pressure impregnation section temperature rise gradient is 0°C / m, cooling and desorption The temperature gradient of the mold section is -20℃ / m;
[0075] The linear speed of the winding device 7 is set to 1.2 m / s, and the ...
Embodiment 2
[0077] The selected density is 1.32g / cm 3 , A polyetheretherketone film matrix with a thickness of 0.05mm and a width of 800mm, electronic grade glass fiber cloth 7628 as a continuous reinforcement material, and a control glue content of 40%;
[0078] Set the temperature of the impurity removal and dryingnozzle 3 to 250°C, and use hot air to process the raw materials;
[0079] The linear speed of the orientation roller 4 is set to 1.98m / s, and the pressure is set to 0.4MPa;
[0080] The temperature of the preheating device 5 is set to 330°C;
[0081] The linear velocity of the continuous laminating device 6 is 2m / s, the initial pressure is set to 0.4MPa, the pressure gradient is set to 0.2MPa / m, the initial temperature is set to 360°C, the heating and pressure impregnation section heating gradient is 0°C / m, cooling The temperature gradient of the demoulding section is -20℃ / m, and the pressure is set to 1.0MPa;
[0082] The linear speed of the winding device 7 is set to 2.1 m / s, and th...
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Abstract
The invention relates to thermoplastic prepreg prepared through a continuous laminating method and a method thereof. An existing laminating method for preparing the thermoplastic prepreg adopts intermittent production and is low in production efficiency. According to the method, two resin film rolls are arranged above and below a reinforced fiber roll respectively, and take-up operation is executed through a take-up device. Impurity removing and drying nozzles are arranged on the advancing path of reinforced fibers and resin films, the reinforced fibers and the resin films are converged to directional roller sets opposite vertically to be positioned and are preheated through preheating equipment sets opposite vertically, the positioned and preheated reinforced fibers and the resin films pass through continuous laminating equipment sets which are each provided with a heating and cooling device and are opposite vertically for preimpregnation, and the prepreg is obtained through paying-off and edge cutting operations. The continuous process is adopted, the production efficiency is greatly improved, pretension is exerted on resin and the fibers controllably by adjusting linear speed of each section in the preparation process, and the performance of the thermoplastic prepreg is improved.
Description
Technical field [0001] The invention belongs to the technical field of resin-based composite materials, and specifically relates to a thermoplastic prepreg prepared by a continuous lamination method and a method thereof. Background technique [0002] Resin-based composite materials have higher specific strength and specific modulus than traditional materials such as metals and inorganic materials, and are widely used. Resin-based composite materials are divided into thermoset and thermoplastic composite materials. Compared with thermoset composite materials, thermoplastic composite materials have the advantages of short molding cycle, environmental friendliness, and recyclability. However, since the thermoplastic resin is larger in the molten state, often greater than 100 Pa.s, it is necessary to provide a larger pressure in the conventional preparation process to ensure the impregnation effect. Commonly used dipping methods mainly include direct dipping and extrusion dipping. D...
Claims
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Application Information
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