Water-soluble nonwoven cloth and its proparing method

Abstract

This invention relates to a soluble non-woven fabric and its preparation method, especially the one made of PVA short fibers as the raw materials and the PVA adhesive agent as the binder, in which, the preparation includes: initially carding fibers, accurately carding fibers, carding, spreading the net, forming a net by gas flow, dipping in saturation, drawing the wetness, drying, extending the net, drying and shaping, ironing out, smoothing, arranging to rolls and checking. This invented ''dipping in saturation and drawing humid'' technology replaces the original method of applying glue with foams to strengthen the horizontal and longitudinal pull of the product and the technology of drawing humid can absorb unwanted glue to either ensure the stability of the drying step or recover and use the unwanted glue again.

Description

Technical field: [0001] The invention relates to a water-soluble non-woven fabric and a preparation method thereof, in particular to a non-woven fabric made of water-soluble polyvinyl alcohol short fibers as raw materials and polyvinyl alcohol viscose as a binder. Non-woven fabrics are widely used in the computer embroidery industry as the base fabric of computer embroidery, replacing the original plain paper and fabric, solving the original insoluble shortcomings, improving the production efficiency of embroidery products, making embroidery products inconvenient and more beautiful. Background technique: [0002] As polyvinyl alcohol (PVA) fiber can be melted in hot water, the non-woven fabric made from it can be used as a base fabric for computer embroidery. First embroider laces and ribbons of various patterns and patterns on this water-soluble base fabric, and then wash them with water to dissolve the base fabric in hot water, remove the base fabric, and the beautiful lace and...

AI Technical Summary

Problems solved by technology

[0003] Existing adopting water-soluble polyvinyl alcohol short fiber is that the non-woven fabric of raw material production mainly contains two kinds of methods: the one, as described in CN1461850A, use the papermaking method of online papermaking to filter water, press dehydration, vacuum drying, drying, by The non-woven fabric made by this method has the advantages of uniform texture, etc., but its disadvantages are large investment in equipment, sewage discharge, which is not good for environmental protection. In addition, a certain amount of auxiliary materials other than polyvinyl alcohol is added. The composition of non-woven fabrics is complicated, which is not conducive to the recycling of side materials and waste materials; the other is the production process of general-purpose non-woven fabrics (reported by the "China Science and Technology Achievements Database"). The production process includes: fiber opening , carding and cross-lapping, air-laid, foam sizing, drying and setting, finishing, winding inspection, the production method can overcome the unfavorable factors of the papermaking method, but the foam sizing process is to let the adhesive It produces foam, which is then applied to an air-laid fiber web with a certain thickness and uniformity. The disadvantage of the foam sizing process is that it is difficult to accurately control the amount of sizing, especially for thick non-woven fabrics, and it is difficult to apply to the bottom fibers. Adhesive is enough, but too much adhesive will adversely affect the drying process of the subsequent process

Images