Roving textile

Roving, textile A form of fibrous glass having less twist than is present in a yarn. As a fibrous glass reinforcement, it means strands of continuous fibers wound into a cylindrical spool. Usually 60 strands, or ends are used. For staple fibers, roving is used to designate one or more slivers with a very small amount of twist and thus indicates an intermediate stage between liver and yarn. 

Textile glass—Yarns—Determination of breaking force and breaking elongation Textile glass—Determination of stiffness of rovings Textile glass—Yarns—Basis for a specification... 

Lunte,/. slow match, fuse Textiles) rove, roving cigaret. 

ISO 3597-2 2003 Textile-glass-reinforced plastics - Determination of mechanical properties on rods made of roving-reinforced resin - Part 2 Determination of flexural strength ISO 5893 2002 Rubber and plastics test equipment - Tensile, flexural and compression types (constant rate of traverse) - Specification ISO 6721-3 1995 Plastics - Determination of dynamic mechanical properties - Part 3 Flexural vibration - Resonance-curve method... 

ISO 3597-4 2003 Textile-glass-reinforced plastics - Determination of mechanical properties on rods made of roving-reinforced resin - Part 4 Determination of apparent interlaminar... 

ISO 2558 1974 Textile glass chopped-strand mats for reinforcement of plastics -Determination of time of dissolution of the binder in styrene ISO 2559 2000 Textile glass - Mats (made from chopped or continuous strands) -Designation and basis for specifications ISO 2797 1986 Textile glass - Rovings - Basis for a specification... 

ISO 15039 2003 - Textile-glass rovings - Determination of solubility of size... 

The fibers or the yarn or rovings made therefrom can be processed to fleeces or mats (non-oriented semi-finished product) and textiles, lattices or meshes (oriented semifinished products) and can be utilized as such e.g. for thermal insulation or as filter materials, or in composites with other materials e.g. for fiber-reinforced polymers, metals or ceramics. Fibers are generally marketed after surface treatment (chemical modification, annealing, smoothing) to optimize their application and processing properties. 

In tins connection it diould be borne in mind that structural modification of the fibor is a double-edged weapon since the improvements ate often achieved at the expense of existing fiber properties. The newly modifkd textile material may definitely show some valuable new properties for the required performance, but at the same time some of its excellent ori nal features may have become inq>aired so as to exclude the modified fiber from some of the tn itkmalmd uses of the KT material. Modification of the macromolecule should this be achieved with m oa-tion in order to ensure real success in in roving fiber quality at lea in a ven textfle area. This fact, explains why the modifications have resulted in different effects for different ends and why the improvements concern only one or a few properties of the fiber. For this reason, the big producer conq nies put on the market a great number of modified PET fibers, each of vhich is onfy capable of satisfying the requirements for specific performances. 

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. 

Roving cloth A coarse textile fabric woven from rovings. 

The planar reinforcement was coated and cured in a continuous production process as depicted in Fig. 5. The fabric was driven through a mold filled with epoxy resin. Excessive resin was squeezed out between rollers, so that a uniform application of the resin as well as a nearly saturated roving was achieved. Immediately after coating, the textile was cured in a heating tower at a maximum temperature of 160°C and coiled up to a roll. 

In comparison to steel and steel reinforced concrete, a distinction of FRP composites is their usually ortho tropic mechanical behavior. The strongest direction is always in parallel to that of the fiber direction. Strength and stiffness of a FRP component depend on the orientation of the fibers and quantity of fibers oriented in each direction. Bundles of parallel fibers are called roving. Different textiles... 

UP-G-R Prepreg from unsaturated polyesters and textile glass rovings... 

Textile glass—Continuous filament yarns, staple fibre yarns, textured yarns and rovings (packages)—Determination of linear density Textile glass—Yarns—Designation... 

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