Surface protecting film for mobile phone screen at humid environment
A technology for surface protection films and mobile phone screens, applied in epoxy resin coatings, film/sheet adhesives, adhesive types, etc. Large and other problems, to achieve stable bonding, improve overall performance, and no adhesive residue
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Example Embodiment
[0042] Preparation example
[0043] 1. Wear-resistant coating
[0044] Wear-resistant coating A Wear-resistant coating B Wear-resistant coating C Wear-resistant coating D Epoxy acrylate30303040 Epoxy resin1010100 Photoinitiator0.70.70.70.7 Amine curing agent1.81.81.81.8 Leveling agent0.70.70.70.7 Flake titanium dioxide8008 Spherical titanium dioxide0800 Nano zinc oxide008 Coupling agent0.80.80.80.8 Solvent48484848
[0045] 2. Adhesive
[0046] Adhesive A1 Adhesive A2 Adhesive B1 Adhesive B2 Adhesive B3 Urethane acrylate3030252525 Hydroxyl-containing acrylate1515101010 Water-absorbing additives*0.300.20.40 Crosslinking agent22333 Coupling agent1515222 Photoinitiator0.50.50.50.50.5 Leveling agent1.21.21.51.51.5 Solvent3636.357.857.658
[0047] *Adhesive A1 uses cobalt-free discoloring silica gel desiccant, and adhesives B1 and B2 use porous silica gel desiccant.
[0048] 3. Anti-blue light coating
[0049] Anti-blue light paint A : 30 parts by weight of polyuret...
Example Embodiment
[0053] Example 1
[0054] The front side of a 160μm thick PET film 2 containing 1.5wt% calcium oxide is coated with a wear-resistant coating A and cured to obtain an 80μm thick wear-resistant coating 1, and an anti-blue coating A is applied on the reverse side and cured to obtain a 20μm thick anti-blue layer 3. Coat the outer ring of the anti-blue light layer 3 with adhesive A1 (the area of the outer ring accounts for 10% of the area of the film layer), and the inner area with adhesive B1. The thickness of the adhesive layer is 90μm. There is a 0.1 mm wide annular gap between the outer edges of the inner region, the surface of the adhesive layer is covered with a release liner, and the thickness of the release liner is 100 μm to obtain a surface protective film.
Example Embodiment
[0055] Example 2-3
[0056] The wear-resistant coating B and C were used to replace the wear-resistant coating A in Example 1, respectively, to obtain a surface protective film.
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