JPH0436908Y2 - - Google Patents

Description

[Detailed description of the invention] "Purpose of the invention" The present invention relates to the invention of a breathable and waterproof building material, and aims to provide a building material that maintains waterproofness while ensuring breathability.

(Industrial field of use) Building materials or panels used in various buildings.

(Prior Art) The use of shoji paper as a building material in buildings has been widely practiced in Japan for a long time.

Various materials such as wood, metal, plastic, concrete, and glass are used as such building materials.

Furthermore, various methods of forming panels using such building materials, appropriately using frame materials, or forming panels in the form of plates or other molded bodies have been practiced and put to practical use.

(Problem to be solved by the invention) The above-mentioned shoji paper is made from paper mulberry paper, manila hemp, etc., and has some breathability, but it is not waterproof, and is especially resistant to rainwater. When it contains water due to dew condensation, its strength decreases significantly, so it cannot be used as an exterior wall material, and its use is limited to indoor partitions.

Wood, metal materials, plastic materials, concrete materials, glass materials, etc. have waterproof properties and do not show any particular decrease in strength even when they contain water, but they do not have breathability. Particularly in recent years, heating and cooling technology has become widespread, and under conditions where heating equipment powered by oil-based fuel is used for low-cost heating, pollution of the living environment is unavoidable, and conditions such as oxygen deficiency occur. For this reason, it is necessary to perform sufficient ventilation at regular intervals, which is complicated, and it is also necessary to create a state in which the heating atmosphere is instantaneously exchanged with the atmosphere and the heating effect is completely eliminated.

Furthermore, in rooms that are closed using conventional building materials such as glass, wood, metal materials, and plastic materials, water vapor is generated from the kitchen and other areas as well as being humidified for heating, and this moisture can cause discomfort to the human body. Ventilation and moisture permeability are essential from this point of view as well, which can cause mold to grow on buildings and building materials, impairing their beauty and reducing their durability.

In the end, it is clear that even if it is possible to form a partition structure with a reasonable appearance using the conventional building materials mentioned above, it cannot be made into an appropriate structure for accurately creating and maintaining a desirable living environment. Various inconveniences cannot be avoided.

"Structure of the invention" (Means for solving problems) 1. A breathable and waterproof building material characterized by bonding porous polytetrafluoroethylene film and shoji paper.

2. Breathable and waterproof building material in the form of a panel attached to a frame material.

3. A breathable and waterproof building material in which a reinforcing material such as a net is interposed between a porous polytetrafluoroethylene film and shoji paper.

4. A breathable and waterproof building material with a heat insulating layer formed on the inner surface.

5. A breathable and waterproof building material with protective board pieces lined up on the outside.

(Function) The porous polytetrafluoroethylene film provides both waterproof and dustproof properties as well as breathable and moisture permeable properties.

By adhering to the shoji paper, the film achieves extensibility and moldability even though it is sufficiently thinned, and also ensures breathability and moisture permeability.

The film increases the strength of the shoji paper.

(Example) To explain the specific embodiment of the above-mentioned invention according to the present invention as shown in the attached drawings, in the present invention, as shown in FIG. The present invention proposes a building material in which a polytetrafluoroethylene film 1 is integrally bonded.

The structure of the shoji paper 2 as described above has been widely known and used since at least before the Tokugawa era, and is a paper structure mainly made of mulberry fibers, manila hemp fibers, etc. Representative examples of the specific microscopic structure of the porous polytetrafluoroethylene film 1 that is bonded and integrated with the shoji paper 2 are shown in FIGS. 2 and 3. That is, by appropriately rolling or stretching the polytetrafluoroethylene film, the polytetrafluoroethylene film becomes porous, and numerous fibrillated fine fibers 12 are formed in a spider web shape between a large number of micro nodules 11. It has been confirmed by the present inventors that it can be obtained as a polytetrafluorocarbon material with an average pore size of 0.1 to 20 μm and a thickness of 5 to 100 μm. In combination with the water repellency, which is a material property of ethylene, it has effective waterproofing performance and has an average pore diameter of 0.1 to 20 _μm . have.
As shown in Figure 4, for buildings that are used under conditions that require waterproofing performance against external conditions such as rain and snowfall on the outside of the building, as well as waterproofing performance against dew condensation inside. Polytetrafluoroethylene films 1 and 1 each made porous on the outer surface as described above.
It is possible to adopt an integrated adhesive.
If further reinforcement is required in terms of strength, a mesh material 3 made of fiber or metal is interposed between the shoji paper 2 and the porous polytetrafluoroethylene film 1, as shown in FIG. It is clear that this is a good thing.

When the material according to the present invention is required to have moisture retention properties as an exterior wall material, it is used as an integral finish by attaching a heat insulating material 6 to the material attached to the panel frame 5 as shown in FIG. Furthermore, when the device according to the present invention is used under conditions where it is easily damaged, a blind-like protective plate piece 7 is installed on the outer surface of the panel frame 5 as shown in FIG.
to be arranged. It is clear that the blind-like protective plate pieces 7 may be arranged in rows in the horizontal direction as shown in the figure, but in some cases they may be arranged in the vertical direction. Ventilation and lighting are obtained in the gap 8 formed.

1, 4, 5, and 7, the polytetrafluoroethylene film 1, which has been made thin and porous as described above, has a lighting property similar to that of the shoji paper 2. It is used in the same manner as conventional shoji paper on the market. For example, when attaching to a shoji door as a fitting, if two layers of shoji paper are used, it is possible to bond with a general adhesive, and if a polytetrafluoroethylene adhesive is used, it is possible to bond even one side of the film. is possible. Regarding the porous polytetrafluoroethylene film 1, the one shown in FIG. 2 shows a fibrous structure that has been mainly rolled or stretched in one direction, and in this case, the strength properties of the film 1 are also poor. It has direction. On the other hand, the material shown in FIG. 3 was obtained by rolling or stretching in multiple directions, and in this case, the strength properties generally have no directionality. In contrast to the porous polytetrafluoroethylene film 1, the shoji paper 2 has a certain directionality in strength depending on the direction in which the paper is made, but the relationship between these strength characteristics is not intended. They can be used in appropriate combinations, taking into consideration the directionality of the strength properties of the building materials. If the direction of the strength properties necessary for the building material is the longitudinal direction, the strength direction of the shoji paper 2 for the film 1 in the second figure is also used as the longitudinal direction, and if the strength properties of the building material have no directionality, then The strength direction of the shoji paper 2 and the strength direction of the film 1 are made to intersect, or the film 1 of the type shown in Figure 3 is used.

"Description of the invention" According to the invention as explained above, waterproofness can be obtained due to the fineness of the fibrous structure in the porous polytetrafluoroethylene film 1 and its material properties (water repellency), and water resistance can be obtained on the μm order. It effectively traps the following fine particles and achieves excellent dustproof properties, and also ensures moisture permeability or air permeability in the structure of the shoji paper 2 and the structure of the porous film 1. In other words, it is waterproof. It is possible to provide a new building material that is both flexible and moisture-permeable, and in principle can be used easily using panel frames similar to those used for shoji paper, and can effectively provide daylight. This invention has a great practical effect.

[Brief explanation of the drawing]

The drawings show the technical content of the present invention; Fig. 1 is a partially cutaway plan view of an example of a building material according to the invention, and Fig. 2 is a partially cutaway plan view of an example of a porous polytetrafluoroethylene film used in the invention.
A photomicrograph showing the fiber structure of an example; FIG. 3 is a similar photomicrograph of another example;
FIGS. 4 to 7 are explanatory diagrams summarizing the cross-sectional configuration of each embodiment of the present invention. However, in these drawings, 1 is porous polytetrafluoroethylene film, 2 is shoji paper,
3 is a netting material, 5 is a panel frame, 6 is a heat insulating material, 7 is a protection plate piece, 8 is a gap, 11 is a minute nodule, and 12 is a fine fiber.

Claims (1)

[Claims for Utility Model Registration] 1. A breathable and waterproof building material characterized by bonding porous polytetrafluoroethylene film and shoji paper. 2. The breathable and waterproof building material as set forth in claim 1 of the utility model registration claim, which is a panel member attached to a frame material. 3. Breathable and waterproof properties according to any one of claims 1 or 2 of the utility model registration claim, in which a reinforcing material such as a net is interposed between the porous polytetrafluoroethylene film and the shoji paper. Building materials. 4. The breathable and waterproof building material according to any one of claims 1 to 3 of the registered utility model claims, which has a heat insulating layer formed on the inner surface. 5. The breathable and waterproof building material according to any one of claims 1 to 4 of the utility model registration claims, which has protective plate pieces lined up on its outer surface.