a window film
A window film and transparent technology, applied in the field of window film, can solve the problems of complicated construction process, high production cost, detachment of the adhesive layer, etc., and achieve the effects of simple construction process, improved service life, and improved adhesion fastness.
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Embodiment 1
[0039] 15 parts by weight of acrylic pressure-sensitive adhesive (Shandong Chemical Factory Adhesive Tape Branch Factory YN-903 type), 0.01 parts by weight of polyurethane (Dainippon Ink Chemical Company, trade name: CRISVON NT-165EL) were added to 45 parts by weight of toluene In the solvent, after stirring for 20 minutes, the solution was left to defoam for 30 minutes. Then apply the defoaming solution after standing still on a transparent biaxially stretched PET polyester sheet at 18°C, and dry it at 120°C for 2 minutes to obtain a pressure-sensitive adhesive layer with a dry thickness of 25um The window film Y1.
[0040] At room temperature, sample Y1 was pasted on the glass. After the water and air bubbles were driven off, the glass with sample Y1 was placed in a sunny place. After 15 days, the adhesion between the pressure-sensitive adhesive layer and the substrate PET was measured. Fastness, after three years, observe whether the pressure-sensitive adhesive layer is de...
Embodiment 2
[0042] 50 parts by weight of acrylic pressure-sensitive adhesive (type 201 of Shanghai Great Wall Fine Chemical Factory), 10 parts by weight of polyurethane (Dainippon Ink Chemical Company, trade name: CRISVON5150S) were added to 30 parts by weight of toluene and 52 parts by weight In the mixed solvent composed of ethyl acetate, after stirring for 20 minutes, the solution was left to defoam for 30 minutes. Then apply the defoaming solution after standing still on a transparent biaxially stretched PET polyester sheet at 18°C, and dry it at 120°C for 2 minutes to obtain a pressure-sensitive adhesive layer with a dry thickness of 25um The window film Y2.
[0043] At room temperature, the sample Y2 was pasted on the glass, and after the water and air bubbles were driven off, the glass with the sample Y2 was placed in a sunny place, and the adhesion between the pressure-sensitive adhesive layer and the substrate PET was measured after 15 days. Fastness, observe whether the pressur...
Embodiment 3
[0045] 30 parts by weight of acrylic pressure-sensitive adhesive (PS-7 of Shanghai Synthetic Resin Research Institute), 25 parts by weight of polyurethane (Dainippon Ink Chemical Company, trade name: CRISVON5150S) were added to toluene by 40 parts by weight, 50 parts by weight Parts of acetone and 35 parts by weight of ethyl acetate in a mixed solvent composed of, after stirring for 20 minutes, the solution was allowed to stand for defoaming for 30 minutes. Then apply the defoaming solution after standing at 18°C on a transparent biaxially stretched PET polyester sheet, and dry it at 110°C for 2 minutes to obtain a pressure-sensitive adhesive layer with a dry thickness of 25um The window film Y3.
[0046] At room temperature, the sample Y3 was pasted on the glass. After the water and air bubbles were driven off, the glass with the sample Y3 was placed in a sunny place. After 15 days, the adhesion between the pressure-sensitive adhesive layer and the substrate PET was measure...
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