Glass cloth/polyester

The first two preliminary designs utilize slabs of glass cloth/ epoxy and glass cloth/polyester. For the third design, we chose a... 

Glass-reinforced polyester is the most widely used reinforced-resin system. A wide choice of polyester resins is available. The bisphenol resins resist strong acids as well as alkahne solutions. The size range is 2 through 12 in the temperature range is shown in Table 10-17. Diameters are not standardized. Adhesive-cemented socket joints and hand-lay-up reinforced butt joints are used. For the latter, reinforcement consists of layers of glass cloth saturated with adhesive cement. 

Aircraft radomes, ducting, spinners and other parts are often prepared from polyester resins in conjunction with glass cloth or mat. The principal virtue here is the high strength/weight ratio possible, particularly when glass cloth is used. Land, sea and air transport applications account for almost half the polyester resin produced. 

Property Polyester/ Glass Mat Polyester/ Woven Glass Qoth Epoxy/ Woven Glass Cloth Epoxy/ Filament Wound Glass Rovings... 

Polyester coatings are suitable for concrete and steel substrates. The systems are generally used as laminates in conjunction with the use of glass cloth or glass flakes as the reinforcement. Polyester coatings are particularly useful in areas where resistance to mineral acids is required. Typical properties of polyester coatings are given in Table 9.2. 

Key C = Conditional R = Recommended N = Not recommended = Reinforce with polyester or carbon cloth, not with glass cloth. 

When the asphalt membrane is to be used in an exposure involving acid fluorides (such as a nitric-hydrofluoric pickling solution in a pickling tank for stainless steel), the designer should specify that the polyester fabric given above be used for reinforcing rather than the above glass cloth. 

Use Heating pads (combined with glass fiber), protection clothing, polyester and epoxy composites for jet engine components, spacecraft, compressor blades, airframe structure, electrodes for sparkhardening metals, flame-proof textile products, engineering thermoplastics. 

Property Polyester/ Class Mat Polyester/Woven Glass Cloth... 

In industrial filtration a common filter medium is canvas cloth, either duck or twill weave. Many different weights and patterns of weave are available for different services. Corrosive liquids require the use of other filter media, such as woolen cloth, metal cloth of monel or stainless steel, glass cloth, or paper. Synthetic fabrics like nylon, polypropylene, and various polyesters are also highly resistant chemically. 

Commercial development of this field was aided by a fortuitous set of circumstances. Maleic anhydride became available commercially shortly prior to World War II and cheap styrene for synthetic rubber during this conflict. Glass fibers in woven cloth form appeared at about the same time. A demand for radomes for aircraft caused a search for a strong lastic material which literally would be a window for radar waves. Glass cloth-reinforced unSaturated polyester resins provided the strength necessary as well as the desired electrical properties. From this commercial start "in 1944, the imsaturated polyester resin production has grown to an estimated 70 million lb in 1956. The major part of the resin is used with reinforcing fibers of some tj e. 

Uses Primary plasticizer plasticizer/tackifierforPVC peroxide crosslinking coactivator intermediate catalyst extender mfg. of paints reactive diluent in polyester laminating resins forms low-pressure laminates with fillers such as glass cloth, paper, etc. for elec, insulation Mamd./Distrib. Aldrich Allchem Ind. Ashland BP Chems. Ltd C.P. Hall ... 

Polyester thermosetting resin Woven glass cloth 1.5-2.1 10-30 200-350 1-2 300-1600... 

Glass cloth/ Glass cloth/ Unidirectional epoxy polyester glass/epoxy... 

The macroscopic composites are those in which one or both phases tend to have structures large enough to be easily seen with the naked eye. These include paint hlms (paint itself is usually a particulate composite), adhesive joints, and foams (e.g., the familiar polystyrene foams used for coffee cups because of their low heat transfer coefficient). The fabric laminates alternate layers of inorganic cloth and plastic. An important subclass usually has multiple layers of glass cloth or chopped fiber interspersed with layers of unsaturated polyester-styrene AB-cross-linked materials see Section 2.7.3. These sheet molding compounds are widely used for the hulls of pleasure boats, because they are light weight and very puncture resistant, as well as for automotive bodies see Section 13.9.1. 

Curing agent Amount Cure cycle, hr at ° Polyester glass-mat laminate Tensile- Polyester glass-cloth laminate —shear strength, Ib/in Cold-rolled steel 2 Aluminum Brass Copper... 

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