Heat-resistant ultra-high molecular weight polyethylene fiber product and preparation method thereof

Abstract

The invention relates to the technical field of fiber materials, in particular to a heat-resistant ultra-high molecular weight polyethylene fiber product and a preparation method thereof. The heat-resistant ultra-high molecular weight polyethylene fiber product comprises ultra-high molecular weight polyethylene fibers. The wrap yarn is wound and wrapped outside the ultra-high molecular weight polyethylene fiber, and water is adsorbed in the wrap yarn; and the paraffin layer is coated on the wrap yarn. The preparation method comprises the following steps: by taking the ultra-high molecular weight polyethylene fiber as the core yarn, spirally winding and wrapping the core yarn with the wrapping yarn to form the wrapping yarn; soaking the ultra-high molecular weight polyethylene fiber coated with the wrap yarn in water, wherein the wrap yarn absorbs water; and coating the water-absorbed wrap yarn with liquid paraffin, and curing the liquid paraffin to prepare the heat-resistant ultra-high molecular weight polyethylene fiber product. According to the invention, the ultra-high molecular weight polyethylene fiber can be ensured to maintain high tensile strength in a 200 DEG C high-temperature environment within a certain period of time.

Description

technical field [0001] The invention relates to the technical field of fiber materials, a heat-resistant ultra-high molecular weight polyethylene fiber product and a preparation method thereof. Background technique [0002] One of the design standards of commonly used cables: when the cable is overloaded in short circuit, it can carry a maximum temperature of 250 degrees Celsius, and the high temperature duration does not exceed five seconds; the high heat generated in a short time will inevitably act on the main bearing mechanical force through thermal conduction. armor layer. [0003] On the other hand, the English name of ultra-high molecular weight polyethylene (UHMWPE) is ultra-high molecular weight polyethylene (UHMWPE), which is polyethylene with a molecular weight of more than 1 million. Molecular formula: —(—CH 2 -CH 2 —)—n—, density: 0.936~0.964g / cm 3 . The heat distortion temperature (0.46MPa) is 85℃, and the melting point is about 130℃. UHMWPE has excellent...

AI Technical Summary

Problems solved by technology

[0006] Chinese Invention Patent CN201410704931X discloses a reinforced flame-retardant thermal insulation composite material, and proposes to use paraffin wax to make phase-change heat storage materials, which can meet certain strength requirements while realizing heat-absorbing thermal insulation functions; In the field of materials, although to a certain extent it puts forward the demand for heat resistance and ensuring tensile strength, since the upper temperature limit of buildings usually does not exceed 70°C, although this patented technical solution can meet its requirements as a building material to a certain extent However, this technical solution cannot be used for reference in industrial production fields such as cable armor layers; specifically, there are the following technical problems: the existing technology uses paraffin as the main component to make phase-change heat storage materials, and phase-change heat storage materials are attached On the side of the support material to ensure that the support material does not significantly reduce its tensile strength due to overheating

However, when there is an instantaneous high temperature above 200 degrees Celsius in the temperature environment, in order to ensure the state of the supporting material, the amount of paraffin wax used as a phase change heat storage material is relatively large, and the overall quality of the final composite material is greatly improved, which makes the application scene affected. Second, after the paraffin wax heats up, it releases heat gradually and slowly, so that the supporting material is baked at high temperature for a long time, which will also cause the material properties to deteriorate; third, it is impossible for the composite material to maintain an absolute level state when it is applied to the cable , a relatively large amount of paraffin will fill the gap between the phase change heat storage material and the support material after being heated and melted, so that the liquid paraffin gathers to the low point, which strengthens the heat resistance of the low point, while the heat resistance of other points is almost The low point of the composite material will pull the support material asymmetrically, forming a vulnerable point; fourth, the paraffin wax makes the phase change heat storage material, the existing technology needs about four hours of cooling and solidification process, and the phase change heat storage material in this process is relatively It is difficult to purchase and store heat storage materials, and it is not conducive to continuous production