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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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