Spinneret, equipment and method for manufacturing high grammage spunbonded hot-rolled nonwoven fabric

Abstract

The invention relates to a spinneret for manufacturing high-gram weight spunbonded hot-rolled nonwovens, including a spinneret body, which is provided with several circular holes and several inline holes, several circular holes Form a circular hole area, a number of in-line holes form a in-line hole area, the circular hole area is located on the periphery of the in-line hole area, a number of in-line holes are arranged in a circular array, and a number of in-line holes The extension lines in the length direction all pass through the center of the circular array, and several circular holes are also arranged in a circular array. The method for manufacturing high grammage spunbonded hot-rolled nonwovens is characterized in that it includes the following steps: PET raw material—air flow conveying—precrystallization—drying—spinneret melt spinning—side blowing cooling—air drafting—swing Wire forming - hot rolling reinforcement - coiling. The special spinneret hole design of the same plate with different fineness is adopted, and two kinds of spinneret holes with different cross-sectional areas and different shapes are designed in the same spinneret, so that different fineness (diameter) and different crystallinity can be spun of fiber.

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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