Preparation method of reaction injection molding interpenetrating network sweating wear-resistant screen

Abstract

The invention relates to the technical field of screen production. The invention relates to a screen, in particular to a preparation method of a reaction injection molding interpenetrating network sweating wear-resistant screen, which has extensive raw material source and simple preparation process; wherein vinyl ester resin and polyisocyanurate synchronously react to form an interpenetrating network through injection molding; an interpenetrating network structure is realized by means of introduced sweating microcapsules; therefore, the effects of bionic sweating and antifriction are achievedand good toughness and strength are realized; the prepared sweating wear-resistant screen has the advantages of light weight, high screening efficiency, no hole blockage, friction resistance, impact resistance, tear resistance and long service life; the prepared screen has the effects of reducing abrasion and sweating, so that microcapsule lubricating elements can be separated out along ordered channels of an interpenetrating network in a matrix under the action of high-temperature friction heat-stress when the screen is used and are enriched on the acting surface to form a lubricating film, and the high-temperature sweating and self-lubricating functions are achieved.

Description

technical field [0001] The invention belongs to the technical field of screen production, and in particular relates to a preparation method of a reaction injection molding interpenetrating network sweating wear-resistant screen. Background technique [0002] The material for sweating and friction is based on the bionics of human sweat glands. A material matrix with a sweat gland structure is prepared, and a low-melting point alloy or solid lubricant is compounded in the micropores of the matrix. Driven by high temperature and frictional heat-stress field, the microstructure of the matrix The lubricating components in the pores diffuse along the sweat gland-like ordered micropores and accumulate at the friction interface in a similar way to human sweat secretion, forming a lubricating film to realize its high-temperature self-compensating lubrication, a bionic lubrication and anti-friction technology. The earliest proposal of this research idea was not in the field of metal a...

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Problems solved by technology

Chinese patent CN2011103761903 discloses polyphenylene sulfide sweat-type lubricating and wear-resistant composite material and its preparation method. It is a porous grease-containing material with polyphenylene sulfide as the skeleton. The small coefficient is actually a sponge-like porous foam material impregnated with grease lubricating material, which is formed by sintering, which makes it impossible to apply in the screen. The common problem of other similar skeleton porous foam materials is low strength. , The connectivity of the internal pores is not good, and most of them adopt simple impregnation treatment, which has the obvious defects of low or high oil content, poor compactness and easy throwing of lubricating oil during friction. Realizing the bionics of human sweat glands is more similar to a sponge that absorbs grease. The application effect is not good, and it cannot be applied to the screen. It can ensure long-term use under high-frequency vibration conditions or high-temperature conditions, and requires small deformation, light weight, durability, and easy operation. This has led to the existing screen materials being mainly made of polyurethane, rubber, stainless steel, and nylon. The most widely used is polyurethane, which must undergo long-term curing and trimming and other processes through casting. In addition, the screen is always in an alternating state of dry and wet, and its material must be corrosion-resistant.

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