JPH0410029Y2 - - Google Patents

Description

[Detailed description of the invention] This invention relates to a mirror-like laminate having antifogging performance. Conventionally, it is known that a transparent sheet-like material with anti-fogging properties is coated with adhesive and pasted onto a mirror plate, which has the characteristic that fogging does not occur even in a humid place. However, when pasting such a sheet-like material on a mirror plate, the usual method is to soak it in water, etc., but in this case air bubbles tend to remain on the pasted surface, and the resulting surface is also uneven. This is extremely unpleasant in practice. Furthermore, when a normal adhesive is used for lamination, the anti-fogging sheet itself has high water absorption, so a phenomenon in which the adhesive surface peels off due to moisture absorption is often observed. The inventor of this invention came up with this idea as a result of intensive research to solve these problems. This invention will be explained below based on a drawing showing an embodiment of the invention.This invention is based on a sheet-like material 2 having a mirror function and a sheet-like material 1 having an anti-fogging property using a thermosetting adhesive 3. The object is to provide a mirror-like laminate obtained by adhering and further applying an adhesive 4 having excellent moisture and heat resistance to the back surface. The mirror-like laminate obtained in this way can be easily attached to any surface, and even if air enters the surface to which it is attached, it will not affect the surface condition of the mirror and a uniform mirror surface can be obtained. . Furthermore, since the adhesive on the base is not on a sheet-like material with antifogging properties but on a sheet-like material made of another material, it is difficult to peel off even when used in high temperature and high humidity conditions like conventional products. As the transparent sheet-like material 1 having anti-fog properties that can be used in this invention, any sheet-like material having transparency and anti-fog properties can be used. In general, plastic sheets coated with or kneaded with surfactants to provide anti-fog properties, plastic sheets or glass sheets coated with anti-fog paint, cellulose-based, nylon-based sheets, etc. Saponified or hydrolyzed products can be used. Since transparency is required, the thickness is preferably 3 mm or less. The mirror-finished sheet 2 can be obtained by forming a metal surface on a glass plate or plastic sheet, but it is generally easier to use a plastic sheet with metal vapor-deposited on it. As the adhesive 3 having excellent heat resistance, moist heat resistance, weather resistance, and transparency, polyurethane-based, polyvinyl-based, epoxy-based, phenol-based adhesives, etc. can be used, but in this invention, crosslinkable adhesives are preferred. Among these, moisture-curing or two-component curing polyurethane adhesives and epoxy adhesives show particularly good results. Polyvinyl-based adhesives are often used as the adhesive 4 having excellent heat and humidity resistance. Among these, acrylic copolymers and partially crosslinked acrylic copolymers are preferred because they have excellent moist heat resistance. Modified polyurethane adhesives are also preferred adhesives. As the release agent 5, any commonly used sheet-like material having release properties can be used. The thus obtained mirror-like laminate of this invention can be used in places where fogging is likely to occur, such as mirrors in bathrooms and washrooms, window glass, endoscopes for dentists, or as endoscopes attached to the other end of ordinary toothbrushes. can be used. Next, this invention will be explained using examples. Example: A 0.1 mm thick triacetate film with anti-fog performance and a 0.2 mm thick polyester mirror film are bonded together using a two-component curing polyurethane adhesive, and then an acrylic ester copolymer is applied to the back side of the polyester mirror film. A heat-resistant 80°C adhesive consisting of a combination of adhesives was applied, and silicone paper was used as a release paper to bond them together. The antifogging sheet laminate thus obtained was pasted on a glass plate, and a storage test was conducted indoors at 40°C and a relative temperature of 95%. The results are shown in Table 1 below. The conventional product is a 0.25 mm thick cellulose diacetate film that has been saponified and pasted onto the mirror surface with adhesive. 【table】

[Brief explanation of the drawing]

The drawing is a cross-sectional view showing an example of the mirror-like laminate of this invention having antifogging performance. 1... Transparent sheet-like material, 2... Mirror-treated sheet-like material, 3... Adhesive layer, 4... Adhesive layer, 5... Release paper.

Claims (1)

[Scope of utility model registration request] A transparent sheet material with anti-fog performance and a mirror-treated sheet material are pasted together via an adhesive with excellent heat resistance, heat and humidity resistance, weather resistance, and transparency, and then the mirror processing is applied. A mirror-like laminate with anti-fog properties, made by coating the opposite side of a sheet with an adhesive with excellent moisture and heat resistance and pasting a release paper on it.