Preparing method for gray ultraviolet resistant non-woven

Abstract

Provided is a preparing method for gray ultraviolet resistant non-woven. The preparing method comprises the steps of adding a polyester chip into a main stock bin, conducting crystalization and drying at the temperature of 165-175 DEG C, and then conducting fusion in a screw; adding black master batch and ultraviolet resistant master batch into a small stock bin, wherein the adding proportion of the black master batch accounts for 0.5-2% of the dosage of the polyester chip and the adding proportion of the ultraviolet resistant non-woven accounts for 1.5-3% of the dosage of the polyester chip, conducting drying on the mixture for 3-5 hours at the temperature of 85-95 DEG C, adding a big screw into the mixture, and conducting melt mixing on the mixture; conducting screw extrusion after mixing the polyester chip, the black master batch and the ultraviolet resistant master batch, and conducting spinning, cooling, traction tube drafting and web forming to obtain a 80-150 g / m<2> product; conducting acupuncture reinforcing to reinforce and control the thickness of the product. The gray ultraviolet resistant non-woven product has an excellent ultraviolet resistant effect and is mainly used for being paved on the lawn to achieve an effect of partial heat retaining. According to experimental proof, after being exposed under an ultraviolet radiator for 500 hours, the gray ultraviolet resistant non-woven still has a mightiness retention rate of 79%.

Description

technical field

[0001] The invention relates to a preparation method of a nonwoven fabric, in particular to a preparation method of a gray anti-ultraviolet ultrathin nonwoven fabric. Background technique

[0002] Spunbonded nonwovens have poor UV resistance when used as sunshade materials, and most of them are ordinary white nonwovens. For example, polypropylene spunbonded nonwovens do not need to be dried before spinning. The melting point of polypropylene is 170°C, and the spinning temperature is about 170-190°C. With the increase of surface density, the change trend of UVA and UVB transmittance Exponential decline, and as the sun exposure time increases, the anti-ultraviolet performance effect will gradually become worse. Therefore, it is urgent to develop a non-white non-woven fabric with excellent anti-ultraviolet effect obtained by the spunbond method to meet the market demand. Contents of the invention

[0003] The technical problem to be solved by the present inv...

Images