Ink for white reflective film, powder coating, white reflective film and production method thereof, light source mount, and lighting device shade
A technology of white reflective film and powder coating, which is applied in the field of white reflective film, can solve the problem of slow decline in reflectivity and achieve the effect of high hardness and reflectivity
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no. 1 Embodiment approach
[0029] The present inventors studied the cause of the decrease in the reflectance of a white reflective film using silicone. As a result, it was found that when the hardness of the white reflective film is low, the reflectance decreases over time due to the adhesion of dust or the generation of fine scratches on the surface. Furthermore, by using silicone resin instead of soft silicone rubber, a white reflective film having a pencil scratch hardness of 8B or higher was obtained. Specifically, by using a resin composition containing a crosslinkable silicone resin and titanium oxide particles, and containing 10 to 500 parts by mass of titanium oxide particles relative to 100 parts by mass of the crosslinkable silicone resin, a pencil scratch hardness of White reflective film above 8B. According to such a white reflective film, occurrence of the above-mentioned problems can be suppressed. Hereinafter, the ink for a white reflective film (hereinafter also simply referred to as i...
no. 2 Embodiment approach
[0087] refer to figure 1 Each step of the method of forming a white reflective film using the screen printing method will be described. figure 1 Among them, 1 or 11 is an ink containing silicone varnish containing titanium oxide particles, and 3 is a base material. In addition, 4 is a screen used in screen printing. The screen 4 is equipped with the mesh part 4a, the opening 4b, and the frame 4c. In addition, 5 is a scraper, and 6 is a squeegee. 10 or 30 is the coating film, 20 or 40 is the white reflective film.
[0088] The formation of the white reflective film by the screen printing method was carried out in the following steps. First, if figure 1 As shown in (a), the screen 4 is arranged above the base material 3 . Then, ink 11 is loaded on the screen 4 . Next, if figure 1 As shown in (b), the ink 11 is filled in the opening 4b while being spread in the direction of the arrow with the squeegee 5 . Then, if figure 1 As shown in (c), the squeegee 6 is moved in the...
no. 3 Embodiment approach
[0106] In the first embodiment and the second embodiment, the method of forming a white reflective film using ink has been described. According to the method of forming a white reflective film using ink, it may be difficult to coat the base material with a uniform film thickness on the base material having a three-dimensional shape or a mixed area of uneven areas. Specifically, when ink is used, the outline of small unevenness may be filled and smoothed by forming a coating film. In such a case, it may not be possible to reflect the shape of the region having the step difference on the surface of the white reflective film. The present inventors found that by forming a white reflective film using a powder coating, it is possible to coat a base material with a uniform thickness without covering the surface shape even on a base material having a surface shape with a difference in height. Hereinafter, a third embodiment based on such knowledge will be described in detail.
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Abstract
Description
Claims
Application Information
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