A cold-resistant semi-hard ash pvc plastic for double-twisted steel wire mesh

Abstract

The invention relates to cold-resistant semihard ash PVC plastic for a double-twisted wire mesh. The cold-resistant semihard ash PVC plastic is prepared from the following components in parts by mass: 100 parts of PVC resin, 35-65 parts of a plastifier, 3-5 parts of a composite stabilizer, 3.5-5 parts of a filler, 0.5-1 part of a lubricant, 0.1-0.3 part of an antioxidant and 0.5-1 part of an ultraviolet light resistant absorber. High-content dioctyl sebacate is added to the plastifier and is used for improving the cold resistance of the PVC plastic; besides, a proper amount of the antioxidant, a proper amount of the ultraviolet light resistant absorber, a proper amount of the filler and the like are separately added to compounded ingredients, and used for delaying the ageing time of the plastic and controlling the hardness of the plastic. The cold-resistant semihard ash PVC plastic prepared by the formula is good in low-temperature properties, high in heat stability, moderate in shore hardness, high in ageing resistance and the like, and meets operating requirements of special environment in the respects of comprehensive properties. At present, the material is already and successfully applied to the field of slope protection type double-twisted wire meshes and the like, breaks foreign monopoly, fills a domestic gap, and has good social benefits and economic benefits.

Description

technical field [0001] The invention relates to the field of double-twisted steel wire mesh suitable for slope protection, in particular to a cold-resistant semi-hard gray PVC plastic used for double-twisted steel wire mesh. Background technique [0002] For a long time, landslides and soil erosion on slopes formed by construction have brought great hidden dangers to our personal and property safety. In order to solve this problem, at present, the method of covering a layer of twisted steel wire mesh on the slope is generally used to reinforce it. After 3 to 5 years, when various vegetation grows on the slope and has its own soil protection function, the twisted wire The slope protection function of the combined steel wire mesh is completed. In order to make the double-stranded wire mesh reach the specified service life, we often coat the wire mesh with a protective layer to prevent the wire mesh from being oxidized and degraded. [0003] As we all know, PVC plastic has be...

AI Technical Summary

Problems solved by technology

Due to the particularity of the use environment of slope protection type twisted wire mesh, when PVC plastic is used as the protective layer of double twisted wire mesh, it is easy to age under sunlight for a long time with the passage of time, and the mechanical strength is unstable with the ambient temperature, especially , easy to harden and crack in low temperature environment

Based on one or more of the above shortcomings, domestic PVC plastics have not been applied in the field of twisted wire mesh for a long time

[0004] Chinese patent CN201210396064 "PVC compound with improved cold resistance" discloses the use of a higher content of cold-resistant plasticizer to improve the cold-resistant impact fracture rate of the material, but the published patent does not clarify the type of cold-resistant plasticizer used and its implementation effect description Fuzzy; Chinese patent CN201410470912 "a PVC cable sheath resistant to cold and heat" discloses a formula of PVC cable sheath, the improvement of its performance is mainly reflected in the stability of high temperature resistance, and the PVC plastic is mainly used in cable insulation materials; Chinese patent CN102352077A "a stone-wood-plastic composite material" discloses an environmentally friendly and aging-resistant PVC plastic, which is made of PVC and stabilizers, calcium carbonate, titanium dioxide, and ACR. Poor strength, etc.; Chinese patent CN201310295810 "An oxidation-resistant PVC" is made of PVC, bisphenol A, triphenyl phosphite, epoxy chlorocarbon, plasticizer, heat stabilizer, ultraviolet absorber, and antioxidant. , but this patent does not consider its mechanical strength when it is cold-resistant due to its technical field limitation

[0005] Although there are many PVC plastic synthesis formulas involved in domestic patents, it has not been possible to find a PVC plastic that can fully meet the environmental requirements of slope protection double-pair steel wire mesh.

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