Method for preparing high-tenacity hot-melt prepreg by hot-melt resin matrix
A resin-based, high-toughness technology, applied in the direction of chemical instruments and methods, synthetic resin layered products, lamination, etc., can solve the problems of sacrificing the mechanical properties of composite materials, increasing costs, and increasing resin viscosity, so as to eliminate prepregs Decreased pavement and difficulty in pressurization, strong adaptability, and improved toughness
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Example Embodiment
[0021] Example 1:
[0022] When the resin film is made of phenolic resin, one or more of polysulfone, polyamide, polyether ether ketone, and polytetrafluoroethylene are used as the powder material. The specific examples are:
[0023] Raw material: T700 carbon fiber, fiber surface density is 250g / m 2 ; The prepreg resin is a phenolic resin system, and the prepreg resin content is required to be 40%±2%, that is, the unit area weight of the phenolic resin film is 167g / m2 2 ±8g / m 2 .
[0024] Ordinary prepreg: control the unit area weight of the single-sided film to be 83.5g / m2 2 ±5g / m 2 , after hot pressing, prepreg, cooling and winding with double-sided adhesive film.
[0025] This method: control the unit area weight of the single-sided film to be 63.5g / m2 2 ±4g / m 2 , using 300 mesh polyamide powder, the powder is dispersed on one side, and the weight of the single side of the control powder is: 40g / m 2 ±3g / m 2 , the thermoplastic content is about 24%. After film hot ...
Example Embodiment
[0027] Embodiment 2:
[0028] When the resin film is made of cyanate resin, the powder is made of one or more of polysulfone, polyethersulfone, polyetherimide, and polytetrafluoroethylene. The specific examples are:
[0029] Raw material: aramid fiber fabric, fiber surface density is 220g / m 2 ; The prepreg resin is a modified cyanate ester resin system, and the prepreg resin content is required to be 40%±2%, that is, the weight per unit area is 147g / m2 2 ±7g / m 2 .
[0030] Ordinary prepreg: control the unit area weight of single-sided adhesive film to be 73.5g / m2 2 ±5g / m 2 , after hot pressing, prepreg, cooling and winding with double-sided adhesive film.
[0031] This method: control the unit area weight of the film to be 18.5g / m 2 ±2g / m 2 , using 100 mesh polysulfone powder, the powder is dispersed on one side, and the area weight of the control powder is: 110g / m 2 ±10g / m 2 , The thermoplastic content is about 75%, after film hot pressing, prepreg, cooling and windi...
Example Embodiment
[0033] Embodiment three:
[0034] When epoxy resin is used for the resin film, one or more of polysulfone, polyamide, polyethersulfone, polyetherimide, and polyetheretherketone are used as the powder material; specific examples are:
[0035] Raw material: T700-12K carbon fiber, fiber surface density is 145g / m 2 ; The prepreg resin is a medium temperature epoxy resin system, and the prepreg resin content is required to be 45%±3%, that is, the weight per unit area is 118g / m2 2 ±8g / m 2 .
[0036] Ordinary prepreg: the squeegee temperature is 50℃±5℃, and the total weight of the prepreg is controlled at 263g / m 2 ±10g / m 2 , Rewind after pre-soaking.
[0037] This method: the squeegee temperature is 50℃±5℃, and the unit area weight of each single-sided adhesive film is controlled to be 44g / m2 2 ±4g / m 2 , using 800-mesh polyethersulfone powder, dusting on both sides for toughening, and controlling the single-sided area weight of the powder: 15g / m 2 ±3g / m 2 , the thermoplastic...
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