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Preparation of Waterborne Polyurethane Composite Reinforcing Liquid and Study on Anti-UV Aging Properties of Coated Xuan Paper |
Received:January 22, 2022 |
DOI:10.11980/j.issn.0254-508X.2022.09.010 |
Key Words:polyurethane acrylate epoxy acrylate xuan paper reinforcement anti-UV aging |
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Abstract:In this study, JZEP reinforcing liquid was prepared by blending waterborne polyurethane acrylate JZ-4234 with epoxy acrylate EP-6204, which was subsequently coated on the surface of Xuan paper. The effects of EP-6204 content in the blending system on the UV transmittance of the reinforcing liquid film and the coating amount on the strength properties of the paper were investigated; the effects of aging time on the strength properties and whiteness of the paper coated with the reinforcing liquid were discussed. The results showed that with the addition of EP-6204, the UV transmittance of JZEP reinforcing liquid membrane in the near UV region could be reduced to less than 25%, showing a good UV shielding effect. When the coating amount was approximately 23%, the strength performance of Xuan paper increased significantly. Meanwhile, the strength performance of Xuan paper coated with JZ reinforcing liquid was higher than that of its JZEP-10 counterpart, and the tearing breaking strength reached the maximum (79.5 mN), which was 58% higher than that of Xuan paper. The results of UV accelerated aging showed that JZEP reinforcing liquid had good anti-UV aging ability, and the strength loss rate of Xuan paper coated with JZEP-10 reinforcing liquid was lower than that of its JZ counterpart. After 5 days of UV aging, the dry tensile strength loss rate was about 16%, the wet tensile strength loss rate 40% and the tearing breaking strength loss rate 24%. |
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