THERMALLY CONTACT BONDED WATER-RESISTANT POLYVINYL ALCOHOL-BASED CONTINUOUS FILAMENT NONWOVEN FABRIC AND ITS PRODUCTION

摘要

PURPOSE:To obtain a material, having water resistance, a high strength and thermal contact bonding properties (heat sealability) in combination and suitable as agricultural and horticultural materials and materials related to living by bonding polyvinyl alcohol-based continuous filaments without using a chemical adhesive at all in a polyvinyl alcohol-based continuous filament nonwoven fabric. CONSTITUTION:This polyvinyl alcohol-based continuous filament nonwoven fabric comprises fibers of an island-in-sea structure, obtained by blending a high-melting polyvinyl alcohol-based polymer with a low-melting water-resistant polymer within a specific range and carrying out the low-temperature blend spinning and containing the high-melting polyvinyl alcohol-based polymer as a sea component and the low-melting water-resistant polymer as an island component. A chemical adhesive is not used for mutually bonding the fibers at all and the low-melting polymer which is the island component is pushed out to the fiber surfaces by the thermal contact bonding to mutually bond the fibers. The resultant nonwoven fabric has water resistance a high strength and thermal contact bonding properties (heat sealability) in combination.