Online hydrophilia treatment method for surface of polyethylene sheet material

Abstract

Disclosed is an online hydrophilia treatment method for surface of a polyethylene sheet material. The sheet material is heated through a heating plate, a liquid film is formed by coating the surface of the preheated material with a modifier, the sheet material is then sent into an ozone treatment chamber through a conveyor belt for secondary heating to achieve surface catalytic oxidation and filmcuring, and meanwhile, waste gas generated after ozone treatment is collected and purified and then supplies to an ozone generator for recycling, and finally the sheet material is rolled up and stored. Since butyl methacrylate oligomer serves as the surface modifier, volatility of butyl methacrylate monomer is reduced, a good film forming effect is achieved based on the high fluidity, the treatment process of soaking after use of solvents is avoided, and energy saving and environmental protection are achieved, while the molding process is simplified. Besides, the ozone treatment chamber utilizes a staged heating treatment manner, time for treatment is shortened greatly; only upper surface of the sheet material is subjected to treatment, so that the circumstance that both inner and outer surface of a finished product are hydrophilic and tacky is avoided.

Description

technical field [0001] The invention relates to the technical field of polyethylene sheet production, in particular to an online hydrophilic treatment method for the surface of polyethylene sheets. Background technique [0002] Since polyethylene is a non-polar material, its surface energy is low, and its contact angle to polar solvents such as aqueous solutions is large. In the ideal mixed state, it is difficult to effectively transfer stress between the interfaces during the stress process, resulting in unsatisfactory comprehensive properties of the material. There are many ways to improve the compatibility of polyethylene with other materials and increase the hydrophilicity of the surface, such as changing the main structure of the molecular chain through copolymerization, grafting or crosslinking in chemical modification, or through blending and reactive extrusion. In order to increase the polar groups in the polyethylene matrix, the above modification method is to adju...

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Problems solved by technology

At present, there are not many literatures and patents on surface treatment of polyethylene by using ozone to increase hydrophilicity, and there are generally deficiencies such as cumbersome treatment process, complicated process, long treatment time and short timeliness of treatment effect.

[0004] At present, domestic patents of the same technology have patent number: CN201510762453 discloses "a combined preparation method of hydrophilic ultra-high molecular weight polyethylene powder" and patent number: CN200410062258 discloses "hydrophilic ultra-high molecular weight polyethylene microporous membrane surface "Hydration modification method" is based on ultra-high molecular weight polyethylene, and the surface of the ozone pretreated substrate is grafted and modified by solution immersion. The treatment process is complicated and time-consuming (more than 8h), and it is difficult to meet Process requirements for high-speed extrusion molding of polyethylene sheet and selective treatment of one side

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