Method for preparing transparent hardening coat on surface of plastic plate

Abstract

The invention discloses a method for preparing a transparent hardening coat on the surface of a plastic plate, using curtaining film making and UV radiation curing method, the steps are as follows: using acrylate oligomers, acrylic acid ester monomer and organic solvent, photoinitiator and auxiliary agent to prepare photo-cured coating; cleaning the surface of the plastic sheet; curtaining the photo-cured coating on the surface of the plastic sheet; naturally levelling the wet film on the plastic plate, then roasting and cooling; and curing the wet film on the plastic plate by UV to form transparent hardening coat. The method of the invention is simple, uses the curtaining method to form film, has low requirements on equipment and technology, and can be easily achieved on various plastic base materials, therefore, the surface of the obtained coat is transparent and smooth, the penetration is high, and the hardness can be enhanced by 6-8 levels than original sheets. The obtained hardening coat has excellent performances of impressionability, engravable and processable properties, film coating property, and the like, thereby being benefit for better protecting plastic base materials, and being adapted to the new developments of electronic products, electrical appliances and digital products.

Description

technical field [0001] The invention relates to a method for preparing a hardened coating, in particular to a method for preparing a transparent hardened coating on the surface of a plastic plate. Background technique [0002] Transparent plastic materials, such as polycarbonate (PC), polymethyl methacrylate (PMMA), polyxylylene glycol ester (PET), polystyrene (PS) because of their excellent light transmission and processability , Toughness, has been widely used in various industries and fields, such as display screens, windows and touch screens of digital products (mobile phones, LCD monitors, digital cameras, MP3 / MP4, digital photo frames, game consoles), household, medical or industrial appliances, Instrument control panels and nameplates, display windows, cabinets, billboards, glasses lenses, reflectors, diffusers, light guide plates for optical instruments, etc. [0003] However, plastic materials have some major defects, namely low surface hardness, poor wear resistan...

AI Technical Summary

Problems solved by technology

Hardened coatings are mainly divided into heat-cured silicone resins and UV-cured polyacrylate resins. The former will affect printing performance due to its low surface energy. Therefore, most of the above-mentioned application fields use UV-cured hardening methods. The method of coating pre-treats the surface of the plastic sheet, but the equipment investment is large, the paint is wasted, the energy consumption is large, and various surface defects of the product are difficult to avoid, and the relevant technical requirements are relatively high.