Understanding glass fiber cloth, Product Knowledge
1, glass fiber roving fabrics (fiberglass roving)
Fiberglass roving roving is plain fabric, hand lay fiberglass important substrate. Plaid's strength mainly in the warp and weft of the fabric, the requirements for high zonal intensity over the case or to be woven into unidirectional fabric, it can be disposed of more roving in the warp or weft, single warp cloth, single weft cloth. Roving roving is bundle of parallel strands or parallel monofilaments made. Roving by the glass component can be divided into: E-GLASS E-glass rovings and C-GLASS alkali glass rovings. Glass roving used in the production of glass fiber diameter from 12 ~ 23μm. Number of roving number from No. 150 to No. 9600 (tex). Rovings can be directly used for certain composite materials technology molding method, such as surround entangled, pultrusion, because of the tension on average, can be woven into a roving fabric, in some applications will be further short roving cut. Chambray other quality requirements are as follows: ① average fabric, cloth edge straight, smooth fabric was sheeted, no stains, fluff, creases, wrinkles, etc; ② warp, weft density, basis weight, long pieces of cloth and roll all in line with the scale; ③ wound on a solid paper core, wound clean; ④ fast, good permeability resin; dry, wet mechanical strength ⑤ fabric laminate material shall meet the requirements. Plaid plated with molded composite material which is characterized by low interlaminar shear strength, pressure and fatigue strength difference.
2, a glass fiber cloth mat
(1) chopped strand mat glass strand (sometimes with rovings) cut to 50mm long, randomly but evenly lay on the belt, and then subjected to an emulsion adhesive or by spreading the powder caking agent After heat curing adhesive into chopped strand mat. Chopped strand mat is mainly used for hand lay-up, continuous system board and mold and SMC molding process. Of chopped strand mat quality requirements are as follows: ① quality area average width direction; ② chopped strand mat surface distributed in average, no big perforation forming binder distribution average; ③ have felt moderate dry strength; ④ good The resin infiltration and permeability. (2) continuous strand mat glass strand drawing or formed during the retreat from raw silk solution cartridge out continuous strand 8-shaped plated continuously moving mesh belt, dried powder adhesive bonded. Continuous strand glass fiber mat is continuous, so the reinforcing effect of the composite short-cut felt good. Mainly used in the pultrusion method, RTM method, a pressure bag method and glass mat reinforced thermoplastic (GMT) and other processes. (3) surface mat FRP products usually require rich resin layer is formed, which is generally used in the base surface of the glass mat to achieve. Because the use of such alkali glass mat (C) is made, it gives GRP chemical resistance particularly acid resistance, and because the carpet is thin, so the small diameter of the glass, but also absorb more resin-rich resin layer, cover live in glass fiber-reinforced material (such as Plaid) lines, played the role of surface polish. (4) needle felt needle felt or chopped into continuous strand fiber needle felt and needle felt. Chopped fiber glass roving needle felt is cut short 50mm, random laid on pre-positioned on the substrate on the conveyor belt, and then use a barbed needle acupuncture needle pierce chopped fiber substrate rather crochet turn up with some of the fibers together to form a three-dimensional structure. The substrate can be diluted with a fabric of glass fibers or other fibers, this needle felt plush feel. Its main uses include use as acoustic insulation materials, thermal lining materials, filter materials, can also be used in the production of glass fiber reinforced plastic, but lower strength fiberglass prepared, limited range. Another continuous strand needled felt, is a continuous glass strand wire device with random toss toss in a continuous mesh belt, the acupuncture needle plate, forming a carpet fibers are three-dimensional structure of collusion. This mat is mainly used for glass fiber reinforced thermoplastic sheet may stamping production. (5) suture chopped glass fiber mat from 50mm and even 60cm long with a stitching machine can be sewn into a chopped fiber or filament mat, chopped strand mat former can replace conventional adhesive bond in a number of uses, the latter is to some extent instead of a continuous strand mat. Their common advantage is free of binders, to avoid contamination of the production process, while soaked good performance and low price.
3, glass fiber cloth
The following is the introduction of a variety of glass fiber yarn woven glass fiber cloth, glass fiber fabric. (1) The production of glass cloth glass cloth, alkali and alkali divided into two categories, the majority of overseas E-GLASS E-glass cloth. Glass cloth is mainly used in the production of various electric insulating laminates, printed circuit boards, all kinds of vehicle body, tanks, boats, such as mold. Alkali glass cloth is mainly used for the production of plastic packaging cloth, and for corrosion applications. Properties of the fabric are determined by fiber function, warp and weft density, yarn and weave structure. Density also decided by the yarn and weave structure. Weft yarn plus dense structure, determines the physical properties of the fabric, such as weight, thickness and breaking strength. There are five basic weave: plain plan (similar Plaid), denim twill (General + -45 degrees), satin statin (similar unidirectional fabric), rib leno (fiberglass mesh weave mainly) and Xi Wen matts (similar to Oxford). (2) be divided into a woven fiberglass tape sideband (optical sideband) and non-woven sideband (flash band) is mainly plain weave. E-glass fiber tape used in the manufacture of high strength, good dielectric electrical energy electrical equipment components. (3) glass fiber unidirectional fabric, unidirectional fabric in which the four major axis by breaking a satin or satin weave single fabric is a coarse warp warp and weft yarns of the fine, which is characterized by warp master to 0 degrees having high strength. There are also glass fiber cloth zonal, have two kinds of woven warp and weave, the weft is characterized by thick, thin warp, weft glass fiber yarns are fed, at 90 degrees latitude has high strength. (4) glass fiber fabric stereoscopic three-dimensional fabric is relatively flat fabric, its structural characteristics from one-dimensional to three-dimensional development, so as to strengthen the composite body has good integrity and profile of, greatly improving the interlaminar shear strength of the composite material and anti-damage tolerance. It is followed by the special needs of some of the aerospace, aviation, weapons, ships and other developed, and currently its application has been extended to part of the car, sports equipment, medical equipment and so on. There are five categories: three-dimensional fabric woven, knitted three-dimensional fabric, orthogonal and non-orthogonal three-dimensional non-woven fabrics, woven fabrics and other forms of three-dimensional three-dimensional fabric. Three-dimensional shape of the fabric has massive, cylindrical, tubular, hollow frustum and variable thickness profiled like. (5) The shape shaped glass fiber fabric shaped fabric products to be enhanced and its appearance is very similar, it is necessary in special weaving loom. Symmetrical shape shaped fabric are: domes, cones, caps, dumbbell-shaped fabric, etc., also can be made into boxes, and other differences in hull shape asymmetry. (6) a glass fiber fabric groove slotted core fabric is made of two parallel core fabric, longitudinal bars are connected with fabric composed of a cross-sectional shape may be triangular, rectangular, honeycomb structure. (7) Glass fiber stitched fabric, also known as knitted or woven mat mat, which is different from ordinary fabric, also different from the usual meaning of the carpet. The most typical stitched fabric layer is a layer of warp and weft overlap, by stitching the warp and weft yarns woven together into the fabric. Strengths stitch knit as follows: ① it can increase the limit FRP laminate tensile strength, resistance to delamination strength and bending strength under tension; ② reduce the weight of glass fiber reinforced plastic products; ③ smooth surface of the glass steel surface is smooth; ④ simplified hand lay manipulation, progressive labor productivity. This reinforcing material may instead of a continuous strand mat in pultruded fiberglass and RTM method, it can also replace Gebu in the production of centrifuge glass pipe.
4, a combination of glass fiber cloth
The glass fiber cloth, chopped strand mat, continuous strand mat, roving and roving fabric, etc., according to a certain order of combined reinforcing material, generally have the following: (1) chopped strand mat + None twist roving fabric (2) chopped strand mat + roving cloth + chopped strand mat (3) chopped strand mat + continuous strand mat + chopped strand mat (4) Chopped than carpet + random roving ( 5) chopped strand mat or unidirectional roving cloth +
(6) chopped strand mat + surface (7) of unidirectional glass fiber cloth + glass rovings or thin rods + glass fiber cloth
