Glass scrim

Two-Faced Aluminum Foil over a Core of Glass Scrim Webbing... 

Another available product has two faces of aluminum foil over a core of glass scrim webbing it is coated with asphalt. The membrane is 0.012 in. thick. This material has not been tested as a barrier against diffusive flow of radon, but its performance should be similar to that of other foil-faced products. Seams are sealed with aluminum tape. 

Figures 7.8(a) and (b) display piloted ignition results for a metalized polyvinyl fluoride (MPVF) film of 0.2 mm thickness over a 25 mm fiberglass batting [14]. The MPVF film was bonded to a shear glass scrim (with no adhesive or significant thickness increase) to prevent it from stretching and ripping. The unbounded MPVF film was also tested. This shows several features that confirm the theory and also indicate issues.

This flooring is composed of 3 layers interlayer, print layer, and clear layer. The above table gives the formulation of plastisols used in formation of the interlayer and the clear layer. The interlayer is coated on a glass scrim. This flooring... 

In the course of curing, the viscosity varies from thin to syrupy liquids which is favorable for use to impregnate reinforcing materials, such as fiber glass scrim, used in making wiring boards or circuit boards or other electronic components used in electric or electronic applications. 

Because the host pipe was made of steel, to avoid galvanic corrosion the pipe first had to he lined with a glass fabric. This was satisfied by including very thin glass scrims on both faces of the FRP laminate. 

As with tissue, woven glass cloth is used for decorative or acoustic purposes. Additionally, close-woven fabrics give improved fire-safety properties and are resistant to mechanical abuse. Glass cloth or scrim of an extremely open weave is used on insulants as a key for mastic or hard-setting finishes. 

Tape and film are the most common forms of solid epoxy adhesives. Tape and film are terms that are used rather loosely for adhesives in a thin sheet form. The term tape generally refers to an adhesive that is supported on a web of paper or nonwoven fabric, or on an open-weave scrim of glass, cotton, or nylon. Films, on the other hand, are free of supporting material and consist only of the adhesive. Both tape and film products may be accompanied with a release liner depending on the tack or blocking characteristics of the adhesive. 

The adhesive is manufactured in tape form by a hot-melt process. It is a tacky solid at room temperature. The integrity is maintained by using a finely woven glass fabric scrim as the carrier. This process is an excellent example of the compromises required in the technology of formulation. Some of the high-temperature performance that is expected from the phenolic resole is sacrificed for the improved bond strength and toughness afforded from the epoxy resin. The filler is added to make the thermal coefficient of expansion of the cured adhesive more metallic in nature. Dicyandiamide is the... 

PVC plastisols and latexes are involved in the production of many useful products, including protection of scrim glass fabric used for reinforcement of cementitious boards and other products, production of breathable fabrics woven from coated fibers, fiber optics, and production of various articles (e g., fishing lines or tennis racket string) from coated fibers. Some examples are given below. 

A syntactic core material made of a 120C curing epoxy film adhesive filled with glass micro spheres and supplied with a lightweight carrier scrim is also available. In the uncured state, the material is in... 

Nonwoven scrim Adhesive film/powder Chopped glass mat Adhesive film/powder Central core Adhesive film/powder Chopped glass mat Adhesive film/powder Polyurethane foam Decorative (face) fabric Typically polyester Hot melt Adds rigidity Hot melt Semi-rigid PU foam or resonated waste fibres Hot melt Adds rigidity Hot melt Present if the need for soft touch is required Typically polyester... 

Glass is available in the form of rovings (untwisted bundles of strands), yam (twisted bundles of strands), and bonded, needled, woven and knitted fabrics made fi om each. Yam-based fabrics are the most expensive but yield the strongest composites. The cheapest fabric is the chemically bound, non-woven, two-dimensionally random, chopped strand mat, but where better mechanical properties are needed tapes, scrims, square weaves, twills, satins and various knitted constructions are preferred. 

Hong Kong, China, manufacturer of AR-glass and E-glass roving, chopped strand, yarn, tape, mesh, fiibric, doth, scrim, gun roving... 

Non-woven scrim An open-mesh glass fabric in which two or more layers of parallel yarns are bonded to each other by chemical or mechanical means, the yarns in adjacent layers lying at an angle to each other. 

In reinforced plastics the fabrics most commonly used are glass, cotton, nylon, polyethylene, and aramid. Glass fabrics are used in electrical-grade laminates, mechanical laminates, and marine-grade laminates. Scrim glass fabrics are used as facing layers for smooth, cosmetic applications. 

A scrim cloth can also be used in adhesive bonding as a automatic means of retaining a certain adhesive thickness. In this process, the scrim is used as a cloth spacer, impregnated with adhesive. The glass fibers in the scrim cloth act as shims to separate the two adherends regardless of the amount of pressure placed on the joint. 

As shown in Fig. 14.2, scrims made from polyester and/or glass fibres, and also scrim laminates made with glass or polyester nonwovens, are in use for many different polymer-based membranes. Scrims can often be found in roofing membranes made from PVC, PO, EPDM, or bitumen [9—12]. 

SLI batteries use either phenolic/cellulosic separators, sintered PVC separators or more recently a trend toward microporous polyethylene in either leaf or envelope form. The average pore diameters are in the 5 to 30-/im range. Heavy-duty batteries usually have microporous rubber or polyolefin (mainly polyethylene) separators which have smaller pore sizes and give longer life at a higher cost. Glass liber scrim is added to some separator materials to improve acid retention. 

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