NONWOVEN MATERIAL LAYER, LAMINATED STRUCTURE (VERSIONS), NONWOVEN MATERIAL LAYER MANUFACTURE METHOD Russian patent published in 1997 - IPC

FIELD: textile industry. SUBSTANCE: nonwoven material layer has short polyolefin filaments with tensile strength of 1.2 GPa and modulus of elasticity of 40 GPa and is made in the form of felt containing at least 80% by weight of polyolefin filaments extending randomly in layer plane and having length of 40-100 mm. In other version, layer is made only from polyolefin filaments extending randomly in layer plane in curved line, have length of 40-100 mm and dispersity of 0.5-8 denier. One version of laminated structure has two layers connected one with another. Other version has similar layers making structure having at least one layer of fabric connected with one or each layer of nonwoven material. Nonwoven layer manufacture method is presented in Specifications. EFFECT: increased efficiency, simplified construction and enhanced reliability in operation. 35 cl, 1 tbl