JP2005059506A - Moisture permeable waterproof sheet with radiant heat reflecting function - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To solve the problem that a conventional waterproof sheet for the outer wall of a building does not almost contribute to the shielding of heat and the insulation of heat and, even if a moisture permeable waterproof sheet and an aluminum foil are integrated with each other in order to utilize the radiant heat reflecting action of the aluminum foil or the like, they do not fulfil the function as the moisture permeable waterproof sheet to bring about an increase in cost, the deterioration of processability and the deterioration of execution properties due to an increase in weight. <P>SOLUTION: The moisture permeable waterproof sheet having waterproof properties and moisture permeability is used as a base material while the alumnum foil and a plastic film are laminated and through-holes are provided to the obtained laminate to form a radiant heat reflecting layer. This radiant heat reflecting layer is partially bonded to the base material in a lattice-like, stripe-like or dot-like state by dry lamination and integrated with the base material to obtain the moisture permeable waterproof sheet having a radiant heat reflecting function. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a waterproof sheet.

  In general, as a waterproof sheet for an outer wall of a building, an asphalt type, a rubberized asphalt type, or a moisture permeable waterproof sheet having waterproofness and air permeability is used. These sheets have a thickness of about 0.1 to 2 mm, and even if these sheets are used, heat insulation and heat insulation effects are hardly obtained.

Further, when trying to integrate the moisture permeable waterproof sheet and the aluminum foil in order to use the radiant heat reflecting action of the aluminum foil or the like, the aluminum foil does not have air permeability, so that it does not serve as a moisture permeable waterproof sheet. As a conventional technique for improving this, there is one in which a ventilation hole is provided in an aluminum foil and bonded to a moisture-permeable waterproof paper as a base material. Even in this case, the air hole is blocked by the adhesive when adhering to the moisture permeable waterproof paper serving as the base material, and the aluminum foil is 0.05 mm to prevent the air permeation performance or keep the strength as a sheet. The thickness increases to 1 mm, which leads to cost increase, workability deterioration, and workability deterioration due to weight increase. (For example, refer to Patent Document 1) Further, asphalt-based or rubberized asphalt-based waterproof sheets have poor moisture permeability, and it is difficult for water vapor generated indoors to be released to the outside, causing problems such as internal condensation in the wall. is there.
JP-A-5-79130

The present invention is intended to solve the above-mentioned drawbacks of the prior art, and is intended to improve heat shielding and moisture permeability on the outer wall surface, and to reduce the material cost, and to reduce the material cost. It is to provide a waterproof sheet with a cover.

The present invention has a waterproof and moisture-permeable moisture-permeable waterproof sheet as a base material, and a radiant heat reflecting layer having a through-hole formed by laminating an aluminum foil and a plastic film on the surface thereof in a lattice shape or a stripe shape by dry lamination Alternatively, the present invention has been made by finding that the object described in the problem to be solved by the present invention can be achieved by providing a waterproof sheet characterized by being partially bonded in dots and integrated.

The moisture-permeable waterproof sheet with a radiant heat reflection function according to the present invention is particularly effective when used on an outer wall.

In the present invention, the moisture-permeable waterproof sheet main body includes a sheet having waterproof performance and breathability generally used as a waterproof layer for walls. These sheets are composed of polyolefin-based, nylon-based, polyurethane-based nonwoven fabrics, and the like.

As the reflective layer, an aluminum foil is attached to a plastic film and then a through hole is opened for ventilation. By laminating aluminum foil and plastic film, it is possible to secure the strength required for drilling and the strength required for construction on site, even if the aluminum foil is thin, and it is flexible and easy to perform on site. good. Moreover, since aluminum foil can be made thin, the cost as a product can also be held down. The thickness of the aluminum foil is preferably 0.004 mm to 0.03 mm, and the thickness of the plastic film is preferably about 0.004 mm to 0.04 mm. If it is thinner than this, the strength of the sheet is insufficient, and if it is thicker, the flexibility is lost. At the same time, it becomes heavier, resulting in poor workability such as on-site cutting and workability at the time of pasting, and increased production costs. The through hole is preferably about 0.5 to 3.5 mmφ, and if it is less than 0.5 mmφ, it is not preferable because water vapor is not sufficiently discharged to the outside and condensation tends to occur. The aperture ratio is preferably 0.5% to 20%, and if it exceeds 20%, the reflectance of the radiant heat is lowered and the heat insulating property is lowered.

Such a reflective layer made of an aluminum foil and a plastic film is integrated by applying an adhesive in a mesh shape or the like to the surface of the waterproof sheet body. By applying an adhesive partially in a lattice shape, stripe shape, or dot shape by dry lamination, the through holes for ventilation opened in the reflective layer can be integrated without being blocked by the adhesive. As the adhesive, an epoxy, rubber, or vinyl chloride two-component reactive urethane is preferable because it has excellent weather resistance. When the adhesive is uniformly applied to the entire surface of the sheet and integrated, the through-hole provided in the reflective layer is blocked and the ventilation is hardly performed, which is not preferable. Moreover, the reflective layer which consists of aluminum foil and a plastic film may be provided in both surfaces of a moisture-permeable waterproof sheet main body, and may be provided only in one surface.

For example, as shown in (FIG. 2), a moisture permeable waterproof sheet with a radiant heat reflecting function (FIG. 2) 8 according to the present invention is attached to an outer wall base, and a moisture permeable waterproof sheet with a radiant heat reflecting function and siding (FIG. 2) Construction is carried out with the ventilation cylinder edge of 7 interposed between the outer wall materials so that a ventilation layer is formed (FIG. 2). Furthermore, a normal heat insulating material is provided on the indoor side as shown in FIG. At this time, the aluminum foil of the sheet with radiant heat reflection function 1 shown in FIG. 1 is positioned on the outer wall side.

The surface of the outer wall material is heated by the influence of solar radiation or the like, and the heat flowing toward the indoor side is transmitted to the ventilation layer directly under the outer wall by the principle of convection and radiation. The heat that flows from the ventilation layer is blocked by the radiant heat reflection action of the aluminum foil, and the blocked heat is discharged by the exhaust heat effect of the ventilation layer, so that the inflow of heat into the room is effectively reduced. Further, the moisture generated indoors passes from the indoor side to the ventilation layer and is discharged by the exhaust effect of the ventilation layer, which is effective in preventing internal condensation. In addition, the structure in which the aluminum foil and the plastic film are bonded to each other ensures flexibility, lightness, and strength, and it is possible to achieve both on-site workability improvement and production cost reduction.

Sectional drawing of the moisture-permeable waterproof sheet with a radiant heat reflective function of this invention is shown. The construction sectional view of the moisture-permeable waterproof sheet with a radiant heat reflection function of the present invention is shown.

Explanation of symbols

1. 1. Aluminum foil 2. Plastic sheet Through hole 4. 4. Adhesive 5. Moisture permeable waterproof sheet 6. Wall material Ventilation trunk edge8. Moisture permeable waterproof sheet with reflection function (this sheet)
9. Insulation material 10. Pillar 11. Stud 12. Indoor side wall material

Claims (1)

A radiant heat-reflective layer with a waterproof and moisture-permeable moisture-permeable waterproof sheet as a base material, with aluminum foil and plastic film laminated on its surface and through-holes provided in a lattice, stripe, or dot shape by dry lamination A waterproof sheet characterized in that it is partially bonded to and integrated.

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