JPS61287812A - Window glass for vehicle - Google Patents

Abstract

PURPOSE:To prevent a glass from being frosted by applying a transparent film having a water pick-up layer which appears to be transparent when water is impregnated inside, on the inner surface of a window glass panel. CONSTITUTION:A transparent film 2 which is formed by applying a water pick-up layer 5 on the front surface of a transparent resin sheet 3, is applied on the inner surface of a front glass with adhesive 4. This configuration allows dew condensed on the front surface because of the dew-point to be absorbed into the water pick-up layer 5 followed by diffusion and gelation which appear to be transparent. Accordingly, this configuration prevents the glass from being frosted.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] This invention relates to a vehicle window glass that can prevent fogging of the glass due to dew condensation.

[Conventional technology]

During the winter and rainy seasons, the humidity and temperature inside the vehicle increase, and moisture (moisture) adheres to the inner surface of the windshield and condenses, causing the windshield to fog up and making it difficult to see what's ahead while the vehicle is running. As a result, safe driving of the vehicle is impaired. For this reason, conventionally, visibility has been ensured by the driver or assistant wiping the fog with a cloth or running the near conditioner in a dehumidifying operation.

[Problem that the invention seeks to solve]

However, it is cumbersome for the driver or his assistant to wipe off the fog with a cloth, and while the vehicle is in motion, there is a danger that the driver may make a driving error or make a mistake in checking the front. Further, dehumidification using a near conditioner requires the driver to operate a lever for dehumidification while driving, and there are other problems such as deterioration of fuel efficiency.

This invention was made in view of these conventional problems, and provides a vehicle that prevents dew condensation and effectively prevents fogging on the inner surface of the glass by keeping the inner surface of the glass constantly moist. The purpose is to obtain window glass for use in

[Means for solving problems]

The vehicle windshield according to the present invention has the following structure: a transparent film is attached to the inner surface of a glass plate such as a windshield, a water absorption layer is provided on the inner surface of this transparent film, and this water absorption layer is impregnated with water. It is.

[Effect]

The water-absorbing layer in this invention changes its original white and translucent properties to transparent properties by impregnating it with water, and
Moisture present in the vehicle interior adheres to this water absorbing layer to prevent condensation, and also to gel the moisture and make it part of the transparent plate.

[Embodiments of the invention]

An embodiment of the present invention will be specifically described below with reference to the drawings.

FIG. 1 is a perspective view of a vehicle window glass. In the figure, reference numeral 1 denotes a windshield body serving as a window glass plate, and the windshield body 1 may be any type of glass plate conventionally used for vehicles.

Reference numeral 2 denotes a transparent film adhered to the inner surface of the windshield body 1, and the back surface thereof is an adhesive layer of adhesive so that it can be attached to and detached from the windshield body 1 at will.

FIG. 2 is a sectional view of the transparent film 2. This transparent film 2 includes a resin sheet 3 having a thickness of, for example, 50 μm, which serves as a base sheet, an adhesive layer 4 provided on the back surface of this resin sheet 3, and
It is integrally formed with a water absorbing layer 5 provided on the surface of the resin sheet 30, and this water absorbing layer 6 is impregnated with water. The water-absorbing layer 5 can be formed by special processing the surface of the resin sheet 30 and providing it integrally, or by attaching a separate water-absorbing member (for example, a water-absorbing sheet) to the surface of the resin sheet 30. As the material for the water-absorbing layer 5, highly water-absorbent resins are commonly used, which are formed from polymer materials such as dengun, cellulose, and synthetic polymers (polyacrylic, poval, etc.) in the form of a film.

In addition, such super absorbent resin is generally white or translucent, but when water is poured into it, it instantly absorbs water and swells, gelling this water-metal body and turning it into a transparent substance, and its water absorption capacity is several hundred times as strong as its own weight. It has the property of reaching from 1000 times to several thousand times.

Next, the operation of the vehicle window glass having such a structure will be described.

Now, when a person gets into the cabin of a vehicle and the temperature of the humid air in the cabin rises, this adheres to the transparent film 2 attached to the windshield body 1. This attached moisture is cooled by the temperature difference with the outside temperature of the vehicle and tends to condense on the water absorption layer 5, but this moisture is quickly diffused and absorbed onto the surface of this water absorption layer 50, and is gelled and becomes transparent. Change into matter. Therefore, this transparent film can reliably prevent fogging due to moisture in the vehicle interior. The water absorbing layer 6 has a water absorbing power of about 100 to several thousand times its own weight,
Under normal usage conditions, it can be used for more than one year without needing to be replaced.

The transparent film 2 can be used not only on the windshield body 1 but also on door glass and the like.

〔Effect of the invention〕

As explained in detail above, the present invention comprises a transparent film adhered to the inner surface of a window glass plate, and a water absorbing layer provided on the inner surface of the transparent film. By impregnating it with water, the windshield actively absorbs moisture from the interior surface of the vehicle.
This fogging caused by moisture can be reliably prevented. Thus, does the windshield fog up as in the past? This has the effect of eliminating the need for the troublesome work of wiping with a cloth and the need for dehumidification using a near conditioner, which goes against energy conservation.

[Brief explanation of drawings]

FIG. 1 is a perspective view of a vehicle window glass according to the present invention, and FIG. 2 is a sectional view of the same transparent film. 1...Window glass plate, 2...Transparent film, 5
...Water absorption layer.

Claims (2)

[Claims] (1) A vehicle window comprising a transparent film adhered to the inner surface of a window glass plate and a water absorption layer provided on the inner surface of the transparent film, the water absorption layer being impregnated with water. glass. (2) The vehicle window glass according to claim 1, wherein the water absorbing layer is a water absorbing sheet adhered to the inner surface of a transparent film.