Preliminary dip material for vacuum forming massive article

A large-scale product, vacuum forming technology, applied in the field of polymer materials, can solve the problems of reinforced fiber bending, unable to be discharged in time, and affecting the mechanical properties of the product

Active Publication Date: 2009-07-29
WEIHAI GUANGWEI COMPOSITES
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In the manufacture of large-scale composite products, because the products are longer and thicker, some reaching tens of meters, when ordinary prepregs are used for molding, the layers of prepregs cannot be tightly bonded together, and it is inevitable There will be a small amount of air remaining, and there is no exhaust channel between the layers, so that it cannot be discharged in time when vacuuming. In this way, the residual air will gradually accumulate and increase to form a large gap when the multi-layer prepreg is covered. Voids, resulting in the formation of voids in the product, while bending the reinforcing fibers, which seriously affects the mechanical properties of the product

Method used

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  • Preliminary dip material for vacuum forming massive article

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0013] like figure 1 As shown, in this embodiment, after the epoxy resin composition is heated and melted, it is evenly coated on the release paper capable of carrying the resin so that the weight per unit area is 300g / m 2 resin film, and rolled up for use. Arrange the unidirectional carbon fiber bundles evenly so that the mass per unit area is 500g / m 2 , the coated resin film is bonded to the underside of the yarn bundle, and the resin is impregnated into the reinforcing fibers by heating and / or pressure, so that the matrix resin is completely impregnated into one side of the reinforcing fibers, forming a reinforcing fiber that is completely saturated with the matrix resin 3 , and control that the other side of the reinforcing fiber cannot be completely saturated with the resin, forming a reinforcing fiber 2 that is not completely saturated with the matrix resin, the impregnation rate is controlled at 80%, and a prepreg is formed, and then the weight per unit area is 25g / m ...

Embodiment 2

[0014] Embodiment 2: After the epoxy resin composition is heated and melted, it is evenly coated on the release paper so that the weight per unit area is 320g / m 2 resin film, and rolled up for use. Evenly arrange the glass fibers so that the mass per unit area is 600g / m 2 , the coated resin film is attached to the bottom of the fiber, and the resin is impregnated into the fiber by heating and pressing, so that the lower surface of the reinforcing fiber is completely saturated with the matrix resin, and the upper surface of the fiber is controlled not to be completely saturated with the resin. The impregnation rate is controlled as 90%, and then the weight per unit area is 6g / m 2 The triaxial polyamide mesh is flatly attached to the side that is not completely saturated with resin, and the yarn used in the triaxial polyamide mesh is selected from 12Tex mesh. The spacing is 25mm.

Embodiment 3

[0015] Example 3: In this example, after the epoxy resin composition is heated and melted, it is evenly coated on the release paper capable of carrying the resin so that the weight per unit area is 550g / m 2 resin film, and rolled up for use. The coated resin film with a unit area of ​​900g / m 2 The underside of the triaxial stitchbonded fabric is laminated, and the resin is impregnated into the reinforcing fiber by heating and / or pressure, so that the matrix resin is completely impregnated into one side of the reinforcing fiber, forming a reinforcing fiber 3 completely saturated with the matrix resin, and controlling the reinforcement The other side of the fiber cannot be completely impregnated with the resin, forming a reinforcing fiber 2 in which the matrix resin is not completely impregnated, and the impregnation rate is controlled at 70% to form a prepreg.

[0016] When utilizing the present invention to manufacture large-scale plate products, one side of the reinforcing f...

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Abstract

The invention relates to a high polymer material field, in particular to a prepreg compound used in a vacuum forming massive article, which comprises reinforcing fiber, matrix resin and fiber base-material and is characterized in that the reinforcing fiber is retted by the matrix resin to form the reinforcing fiber at one side which is completely soaked by the matrix resin and the prepreg compound at the other side which is not completely soaked by the matrix resin; wherein for one side of the reinforcing fiber which is not completely by the matrix resin, the soakage rate of the matrix resin is more than or equal to 20% and is less than or equal to 95%.

Description

technical field [0001] The invention relates to the field of polymer materials, in particular to a prepreg for vacuum forming large-scale products. Background technique [0002] As we all know, because of its light weight, high strength, good rigidity, fatigue resistance and other excellent characteristics, fiber-reinforced plastic composite materials have been widely used in recent years, especially large-scale composite products, which can give full play to their full potential in use. The advantages of light weight and high strength of composite materials. [0003] In the manufacture of large-scale composite products, because the products are longer and thicker, some reaching tens of meters, when ordinary prepregs are used for molding, the layers of prepregs cannot be tightly bonded together, and it is inevitable There will be a small amount of air remaining, and there is no exhaust channel between the layers, so that it cannot be discharged in time when vacuuming. In th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L101/00C08K7/02C08J5/24
Inventor 林凤森李盛林段长兵夏向欣
Owner WEIHAI GUANGWEI COMPOSITES
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