Oct 10,2022
(1) Short -cut raw silk felt cut the glass raw wire (sometimes with non -twisting yarn) to 50mm long, random but uniformly spread it on the mesh band, and then apply lotion bonding agent or sprinkler to the pink agent passage through the samples. After heating and curing, bonding into short -cut silk felt. Chopped strand mat is mainly used in hand paste, continuous board and module pressure and SMC process. The quality requirements of short -cut original silk felt are as follows: ① The quality of the width direction area is uniform; ② short -cut original filament is evenly distributed in the felt surface, forms without large pores, and the bonding agent is evenly distributed; ③ has a moderate dry felt strength; ④ excellent Resin infiltration and impregnation.
(2) Consecutive raw silk felt to put the glass raw wire formed in the brushed process or the continuous raw wire resolved from the original filament was paved with a continuous mobile mesh, which was bonded by the powder binder. The fiber in the consecutive glass fiber fiber felt is continuous, so the enhancement effect of composite materials is shorter. It is mainly used in the process of pulling method, RTM method, pressure bag method, and glass felt enhanced thermal plastic (GMT).
(3) Surface felt glass fiber reinforcement products usually need to form a rich resin layer, which is generally implemented with medium -alkali glass surface felt. Because this kind of felt is made of medium -alkali glass (C), it is given glass fiber fiber fiber fiber fiber fiberic chemical resistance, especially acid resistance. At the same time, because of the thin diameter of the felt and the diameter of the glass fiber Living the texture of the glass fiber enhancement material (such as square cloth), it plays a surface modification effect.
(4) Acupuncture -to -fiber felt or divided into short -cut fiber needle felt and continuous original wire needle felt. The short -cut fiber needle felt to cut the glass fiber crude yarn to 50mm, the random store was placed on the bottom material placed on the conveyor belt, and then the needle was pierced with a needle with an inverted hook. In the middle, the hook needle brings up some fibers up to form a three -dimensional structure. The substrate used can be a dilute fabric with glass fiber or other fibers. This kind of acupuncture felt has a fluffy feeling. Its main uses include as insulating sound and sound -lining materials, and filter materials. They can also be used in the production of FRP, but the strength of the glass fiber reinforcement has a low strength and a limited range of use. Another type of continuous raw wire needle felt is to randomly throw the continuous glass raw wire on the continuous mesh belt, and through the needle plate acupuncture, forming a three -dimensional structure that is linked to each other. This felt is mainly used for the production of glass fiber enhanced thermal plastic stamping sheets.
(5) Switching felt short -cut glass fiber from 50mm to even 60cm can use a sewing machine to suture it into short -cut fiber or long fiber felt. The latter replaces continuous original silk felt to a certain extent. Their common advantages are that they do not contain adhesives, avoiding pollution of production processes, and at the same time, they have good permeability and low prices.
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