Fabric basis weight

Polyesters are also used in continuous filament spunbonded nonwovens (see Nonwoven fabrics). Reemay spunbonded fabric is composed of continuous filament PET with a polyester copolymer binder. These spunbonded fabrics are available in a wide range of thicknesses and basis weights and can be used for electrical insulation, coated fabric substrates, disposable apparel for clean rooms, hospitals, and geotextiles (qv). 

However, melt-blown nonwoven fabrics with a microscopic variation of basis weight in different parts are a further drawback. The variation changes little even after the melt-blown nonwoven fabrics are pressed or embossed with metal rolls or press plates. Accordingly, the fabrics or pressed products, when used as separators, cause a microscopic nonuniform passage of electrolytes or ions in different parts of the membrane. 

Instron Model 1125 interfaced with an IBM Personal System/2 Model 55 SX computer equipped with Labvanlage Series IV software. Fiber tenacity, strain, and modulus were recorded. Fabric characterization consisted of evaluating basis weight, thickness, light transmittance, moisture transmittance, and tensile strength and elongation as described previously. 

The mechanical properties of the various erosion control fabrics are reported in Table 11.5. Values for the standard deviation of the thickness and basis weight of the peanut fiber fabrics are unavailable. Due to the limited amount of peanut fabric produced and the fact that the webs were partially created by hand, they were tested only in one direction, labeled as the machine direction in Table 11.5. 

There is an almost unlimited number of ways to characterize spunbonded fabrics. Many tests in use were originally developed for the characterization of textiles and paper products. When taken together, properties such as tensile, tear, and burst strength toughness elongation to break basis weight thickness air porosity dimensional stability and resistance to heat and chemicals are often... 

The nonwoven polyolefin fabric is used. The thickness of the separator is 100-200 pm, and the basis weight of the fiber is 50-80 g/m. The hydrophilicity is provided to the fiber surface of the separator with the sulfonation treatment, plasma treatment or acrylic acid graft polymerization treatment. 

The rate of moisture absorption and biodegradability is primarily dependent on the chemistry of the fibre type, as indicated by Table 11.2. However, the twist of the yarn and the basis weight of the fabric can be used as moderating factors. The higher the twist, the slower the rate of absorption, and the greater the fabric weight, the lower the rate of biodegradation. 

P.A. Boeckeiman, Meeting the special requirements for on-Une basis weight measurement of Ughtweight nonwoven fabrics, Tappi J 75 (12) (1992) 166—172. 

The ground blasting mat is built up in five layers of a textile fabric in a mostly (cross-)twill weave made of aramid filament yarns (without addition of a matrix material) sewn with each other in one or two directions. The thickness is 3.9 mm with a basis weight of 3.2 kg/m ... 

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