Glass cloth, impregnated

The resins known as DAP and DAIP, are cross linked allyl esters of phthalic and rsophthalic acid, respectively. They are notable for rigidity and excellent electrical properties at temperatures up to 4.50" F. Allylic resin-impregnated glass cloth is used in aircraft and missile parl.s. Other... 

The laminate in which the impregnated glass cloths are sandwiched between the PTFE films is then polymerized by adhering onto a hot plate heated at 145°C for 1 min. Thereafter, the PTFE films are peeled off to get a prepreg. Eventually the prepreg is laminated on both sides with a copper foil and a PTFE film having a thickness of 0.05 mm. The laminate is then put into a mold and heat pressed in the mold frame under a press pressure of 4.1 MPa at 200°C for 15 min. 

For the adsorption tests, a sample of silica (Merk) with a specific surface area of 388 m g measured by the BET method was used. The solid specimens used to measure the contact angles were microscope glass slides and pieces of quartz polished using a rotating plate covered with a polishing cloth impregnated with 10 pm diamond polishing particles. 

This device may be considered as a modification and improvement of the devices proposed by Roth and by Zschokke. In the latter, a glass capsule containing H2SO4 was wrapped in a piece of cloth impregnated with a concentrated solution of K.CIO3 + sugar (Ref 1)... 

A good example of large-size fiber-reinforced components in aerospace application is the radome covering the underbelly radar on the Hercules transport aircraft. It is made from very thin polyethylene sulfide (PES) film interleaved with PES-impregnated glass fiber cloth, which is subsequently hot molded in a closed die. The composite radome, nearly 1 m in diameter and 6 mm thick, weighs only 10 kg. 

FR4(FIRE RETARDANT EPOXY -GLASS CLOTH) IMPREGNATE AND COAT WITH A POLYMER (PLASTIC) E G. RESIN... 

An interesting new product from Japan s Kyocera Chemical Corporation is a flexible fibre-reinforced plastic circuit board which is manufactured from a non-woven cloth of glass fibres impregnated with epoxy resin and sandwiched between layers of copper foil. 

Organic substrates consist of layers of paper impregnated with phenolic resin or layers of woven or nonwoven glass cloth impregnated with epoxy resin, polyimide, cyanate ester, BT resin, etc. The usage of these substrates depends on the physical characteristics required by the application of the PWB, such as operating temperature, frequency, or mechanical... 

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