Abstract: A mesh body made of polyethylene terephthalate (PET) having good orientation and having relatively high heat resistance is provided. Each of a split web 1 (longitudinal web) and a slit web 6 (lateral web) has a three-layer structure including a layer (main layer) made of a first thermoplastic resin and bonding layers made of a second thermoplastic resin provided on the respective surfaces of the main layer. The second thermoplastic resin has a heat-sealing property at a temperature lower than a melting point of the first thermoplastic resin. A nonwoven fabric 8 is formed by laminating crosswise a longitudinal web and a lateral web via their bonding layers so that orientation axes of the webs cross perpendicularly to each other. The first thermoplastic resin is PET. The second thermoplastic resin is an amorphous PET copolymer. Before laminating crosswise the webs, their surfaces (bonding layers) are applied with a corona treatment.

Abstract: This invention provides a web expander comprising means for carrying a web 2 having longitudinal slits, means 5 for expanding the width of the web, and opening control means 6 for uniformly forming size and form of openings of the web expanded by said means for expanding. The means 5 for expanding the width consists of a flat expander 15 and two pairs of cloth guider 21, and opening control means 6 comprises two expander rolls 31 as a rotatable ribbed roll, the ribbed roll being adapted to be applied to one side of the traveling net-like web to rotate in the direction in which the net-like web 2 is reduced in width.

Abstract: A laminate sheet has a base layer, and a first uniaxially stretched reticular film and a second uniaxially stretched reticular film laminated to the top and back surfaces of the base layer, respectively. Each of the uniaxially stretched reticular films is made of a thermoplastic resin of the same type. The respective uniaxially stretched reticular films are laminated to the base through thermo-compression bonding with their stretching directions oriented perpendicular to each other.

Abstract: This invention provides a web expander comprising means for carrying a web 2 having longitudinal slits, means 5 for expanding the width of the web, and opening control means 6 for uniformly forming size and form of openings of the web expanded by said means for expanding. The means 5 for expanding the width consists of a flat expander 15 and two pairs of cloth guider 21, and opening control means 6 comprises two expander rolls 31 as a rotatable ribbed roll, the ribbed roll being adapted to be applied to one side of the traveling net-like web to rotate in the direction in which the net-like web 2 is reduced in width.

Abstract: A flame-retardant olefin polymer composition superior in surface whitening preventing property is obtained by blending 100 parts by weight of a resin component consisting principally of:a) 99-60% by weight of a polyolefin resin andb) 1-40% by weight of an olefin polymer modified with an unsaturated carboxylic acid or a derivative thereof: withc) 5-200 parts by weight of a flame retardant: andd) at least one component selected from the group consisting of:1 a mineral oil, a wax, or a paraffin.2 a higher fatty acid or an ester, amide or metallic salt thereof,3 a silicone4 a partial fatty ester of a polyhydric alcohol or aliphatic alcohol-, fatty acid-, aliphatic amino-, fatty acid amide-, alkylphenol- or alkylnaphthol-ethylene oxide adduct, and5 a fluoric elastomer.