Spinneret plate, equipment and method for manufacturing high-gram-weight spun-bonded hot-rolled non-woven fabrics

Abstract

The invention relates to a spinneret plate for manufacturing high-gram-weight spun-bonded hot-rolled non-woven fabrics. The spinneret plate comprises a spinneret plate body, a plurality of circular holes and a plurality of linear holes are formed in the spinneret plate body, the multiple circular holes form a circular hole area, the multiple linear holes form a linear hole area, the circular holearea is positioned on the periphery of the linear hole area, the multiple linear holes are distributed in an annular array, the extension lines of the multiple linear holes in the length direction allpass through the circle center of the annular array, and the multiple circular holes are further distributed in an annular array. A method for manufacturing the high-gram-weight spun-bonded hot-rolled non-woven fabrics is characterized by comprising the following steps of PET raw material preparation, air flow conveying, pre-crystallization, drying, spinneret plate melt spinning, cross air blow cooling, air flow drafting, yarn swinging and web forming, hot rolling reinforcement and winding. A special spinneret plate hole design with the same plate and different deniers is adopted, and two spinneret holes with different sectional areas and different shapes are formed in the same spinneret plate, so that fibers with different deniers (diameters) and different crystallinity degrees are spun.

Description

technical field [0001] The invention relates to the field of nonwoven fabric production, in particular to a spinneret, equipment and method for manufacturing high-gram-weight spunbonded hot-rolled nonwoven fabrics. Background technique [0002] The spunbonding method, also known as the spinning method, is the most important and widely used method in nonwovens. It uses the principle of chemical fiber spinning to lay continuous filament fibers into a web during the polymer spinning process, and the web is reinforced by mechanical, chemical or thermal methods to form a nonwoven fabric. The specific process is as follows: [0003] After the polymer slices are put into the hopper, they are fed into the screw extruder. The screw has a heating function. The slices are melted and extruded in the screw. The filtered melt is transported to the spinning assembly by the metering pump according to a certain flow rate. The filament assembly is equipped with a spinneret with many small h...

AI Technical Summary

Problems solved by technology

[0004] In the production of hot-rolled spunbonded nonwovens, as the weight of the product increases, the product is prone to delamination. Therefore, the spunbonded hot-rolled nonwovens produced by a single-component thermoplastic polymer (such as PET) Cloth is difficult to produce high-weight products, especially 250g / m 2 above products

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