Fabric scrim

The reinforcing ply of laminates may be a woven fabric scrim, a nonwoven web of polymer monofilaments, or a mat of fibers. One of the most common reinforcements in use is also one of the oldest, ordinary cellulose fiber paper. 

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... 

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. 

Coated fabrics extrusion of coated scrim for tarpaulins. .. 

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. 

There are also other products produced such as foamed vinyl fabrics (Chapter 8). One method of fabrication is to coat a thin layer of solid plastisol on embossed release paper, then coating a thicker coating of foam plastisol and finally layering on a cloth scrim. The composite is... 

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. 

All layers with exception of scrim fabric, high performance coating, and print are made out of PVC plastisol or melt (as indicated in the text above). High performance coating is either polyurethane, polyester, or UV curable. 

Woven reinforcement material constructed is by interlacing fibers, yarns, or filaments to form such fabric patterns as basket, plain, harness, satin, leno weaves, scrim, etc. These different weaving patterns are used to provide different processing and/or directional properties. There are filling threads that represent threads in the so-called machine direction warp threads represent those in the transverse direction or at 90° to the filling threads. 

Nonwovens The textile and paper industries are based on the two oldest (wet and dry) processes. Manufacturers of nonwovens for plastics draw on both. With the wet, there are basically two types namely the Fourdrinier and cylinder machine types that have been modified. In addition, two basic types exist for the process formation of the web and application of the bonding agent or system where mechanical carding of fibers is used. The particular equipment and method of operation to be used, with their many modifications, is influenced by desired requirements such as mechanical properties, softness, surface condition, tenacity, etc. There are certain t) es of so-called nonwoven fabric that are directly formed from short or chopped fiber as well as continuous filaments. They are produced by loosely compressing together fibers, yarns, rovings, etc. with or without a scrim cloth carrier assembled by mechanical, chemical, thermal, or solvent methods. Products of this type include melted and spun-bonded fabrics. 

Scrim A low cost reinforcing nonwoven fabric made from continuous filament yarn in an open-mesh construction. Used includes surfacing RPs to produce a smooth surface. Also used as a carrier of adhesives for use in secondary bonding of RPs, etc. 

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. 

Solvent-based polyurethane adhesives find application particularly in the diverse field of product assembly operations, and are used for bonding materials such as steel, aluminium, timber products and rigid insulation. Products are available, however, that have been formulated to cure to a soft flexible adhesive film for bonding flexible materials such as fabrics and nylon scrim to flexible foams and sponge. 

Buckram lb9-kr9m [ME buckeram, fr. OF boquerant, from OP bocamn] (15c) n. A scrim fabric with a stiff finish, often used as interlining. 

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