Water and oil repellent fabric and preparation method thereof

Abstract

The invention discloses a water and oil repellent fabric and a preparation method thereof. Through the cooperation of two guide rollers and two tension rollers, a semi-finished fabric can fully make contact with a water and oil repellent liquid in an immersion liquid tank; piston rods of telescopic cylinders push down first sliding blocks, the first sliding blocks slide down in through grooves, and then the first sliding blocks drive the tension rollers downward through connecting plates, so that the semi-finished fabric between the tension rollers and the guide rollers is stretched, and the stretched semi-finished fabric can fully absorb the water and oil repellent liquid; therefore, the part of the semi-finished fabric that is in contact with the water and oil repellent fluid can be fully relaxed, and the area on the semi-finished fabric where the water and oil repellent fluid is in contact is larger; and therefore, the technical problem in the prior art that the fabric cannot fullyabsorb the water and oil repellent liquid during the water and oil repellent finishing process is solved.

Description

technical field [0001] The invention relates to the technical field of fabric preparation, in particular to a water- and oil-repellent fabric and a preparation method thereof. Background technique [0002] At present, most of the fabrics on the market are made of chemical fiber synthetic materials or mixed with chemical fiber and fabrics. Most of them have poor water and oil repellency. With the improvement of living standards, people's requirements for fabrics are no longer limited to the original basic characteristics such as warmth retention and comfort. [0003] The patent document (201620219692.3) discloses a wear-resistant fabric, which has the functions of antibacterial, anti-radiation, waterproof, fireproof, and wear-resistant. Insufficient strength and tear strength make it easy to be damaged in daily life. In the prior art, when the fabric is water- and oil-repellent, the spinning on the fabric cannot fully absorb the water- and oil-repellent liquid, which also l...

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Problems solved by technology

[0004] The purpose of the present invention is to provide a water and oil repellent fabric and its preparation method, to solve the following technical problems: (1) the polyoxyethylene-polyoxypropylene block copolymer is not easy to absorb moisture, and it is made into a sheet and exposed to the air for a long time In addition, it will not be cemented, so that the raw materials are mixed more fully during the spinning process. The addition of polyvinyl chloride can effectively increase the mechanical properties and tensile strength of the prepared water-repellent and oil-repellent fabric. According to AATCC22-2001, The water-repellent grade of the prepared water-repellent and oil-repellent fabric is 5-6, measured according to AATCC118-2002, and the oil-repellent grade of the prepared water- and oil-repellent fabric is 6-7, measured according to ISO13934-I / 1999, The radial fracture strength of the prepared water- and oil-repellent fabric is 1360-1380N, and the weft fracture strength is 680-690N. According to ISO13937-3 / 2000, the radial fracture strength of the prepared water- and oil-repellent fabric is The tear strength is 31-33N, and the tear strength in the weft direction is 22-24N, which solves the technical problems that the fabric in the prior art is easy to be torn and broken, and the effect of water and oil repellency is not good; (2) Through the cooperative setting of two guide rollers and two tension rollers, the semi-finished fabric can fully contact the water and oil repellent liquid in the immersion tank, and the piston rod of the telescopic cylinder pushes down the first slider. Slide down in the groove, and then the first slider drives the tension roller to move downward through the connecting plate, the semi-finished fabric between the tension roller and the guide roller is stretched, and the stretched semi-finished fabric can fully absorb water and oil repellency Liquid, so that the part of the semi-finished fabric that is in contact with the water-repellent and oil-repellent liquid can be fully relaxed during the immersion process, so that the spinning area on the semi-finished fabric that contacts the water-repellent and oil-repellent liquid is larger, solving the problem of water- and oil-repellent finishing in the prior art During the process, the fabric cannot fully absorb the water and oil repellent; (3) The output shaft of the second motor drives the drive rod to rotate, and the drive rod drives the two second bevel gears to rotate, and the second bevel gear meshes to drive the first cone When the gear rotates, the first bevel gear drives the second slider to slide down along the U-shaped groove through the screw rod, and the two second sliders drive the fixed plate to move downward, and the fixed plate drives the roller and shaft to move downward. The semi-finished fabric between the moving rollers is squeezed, and the unabsorbed water and oil repellent liquid in the semi-finished fabric is discharged into the recovery box. The piston rod of the rotating cylinder drives the connecting block to descend through the screw rod, and the connecting block drives the shaft to further descend. The auxiliary roller on the surface of the shaft presses both sides of the semi-finished fabric to increase the tension on the surface of the semi-finished fabric, so that the semi-finished fabric can be fully squeezed, and the surface of the semi-finished fabric and the unabsorbed water and oil repellent liquid can be removed before drying Carry out effective removal, cooperate with drying to effectively increase the efficiency of the entire water-repellent and oil-repellent finishing process, and solve the problem of insufficient drying and surface water-repellent and oil-repellent fabrics that are directly dried after absorbing water- and oil-repellent liquid in the prior art Technical problems that are difficult to remove

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