JP2016211192A - Vent spacer, method for imparting heat shield function to building material, and heat shield structure of building - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide means capable of securing equivalent heat-shielding properties and moisture permeability, while keeping a manufacturing cost low than that of a conventional product, in a building material.SOLUTION: A method for imparting a heat shield function to a building material includes at least a step of forming a reflection part by applying or printing ink or a coating, which includes one or more kinds of metal powders, onto a part or the whole of a surface of the building material.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a ventilation spacer, a method for imparting a heat shielding function to a construction material, and a heat shielding structure for a building.

  Conventionally, a wooden house has a problem that the ceiling plate is heated by the heat of the attic, the indoor temperature is increased by the radiant heat from the ceiling plate, and the cooling effect is reduced.

In order to solve this problem, the present applicant provided a metal vapor deposition layer on one side of corrugated paper as a ventilation spacer (see Patent Document 1) for securing a ventilation layer between the base plate and the heat insulating layer. The thing which stuck the nonwoven fabric which developed was developed (refer patent document 2).
This ventilation spacer is beneficial in that a heat shielding function can be obtained with a non-woven fabric provided with a metal vapor deposition layer to the extent that moisture permeability is not impaired.

Japanese Patent No. 5477990 Japanese Patent No. 5301213

  However, the conventional ventilation spacer requires a step of separately providing a non-woven fabric to be a metal vapor deposition layer on a corrugated cardboard to be a base material, and there has been a limit to compression of manufacturing costs.

  Therefore, an object of the present invention is to provide means capable of ensuring sufficient heat shielding and moisture permeability while keeping the manufacturing cost lower than that of a conventional product.

The first invention of the present application to solve the above problems is a ventilation spacer for securing a ventilation layer between a wall material or a base plate and a heat insulating layer, and a part of the surface of the ventilation spacer. Alternatively, the present invention provides a ventilation spacer characterized by having a reflection part formed by applying or printing a paint or ink containing at least one metal powder.
According to a second invention of the present application, in the first invention, the one or more metal powders include an aluminum powder.
According to a third aspect of the present invention, in the first or second aspect, the main body is corrugated paper.
According to a fourth aspect of the present invention, in any one of the first to third aspects, a slit is provided on a surface of the ventilation spacer.
The fifth invention of the present application is a method for imparting a heat shielding function to a construction material, and a paint or ink containing one or more metal powders on a part or all of the surface of the construction material. A method for imparting a heat shielding function to a construction material is provided, which includes at least a step of forming or reflecting a portion by applying or printing.
According to a sixth aspect of the present invention, there is provided a shielding for a building using the ventilation spacer according to any one of the first to fourth aspects or the construction material obtained by the method according to the fifth aspect. Provides thermal structure.

The present invention has at least one of the effects described below.
(1) It becomes unnecessary to use a nonwoven fabric.
Without providing a non-woven fabric or the like constituting the metal vapor deposition layer, a heat shielding function can be imparted, which contributes to the reduction of manufacturing costs.
(2) Control of heat shielding, moisture permeability and strength is possible.
By adjusting the ratio of the reflecting portion to the surface of the construction material and the number of slits provided separately, the balance between heat shielding properties and moisture permeability and the balance between strengths can be arbitrarily controlled.

The schematic perspective view of the ventilation spacer which concerns on this invention. The schematic sectional drawing of the ventilation spacer which concerns on this invention. The table | surface which shows the comparison results, such as a heat-shielding function.

<1> Overall configuration.
The present invention is a method for imparting a heat shielding function to a construction material, wherein a paint or ink containing one or more metal powders is applied or printed on a part or all of the surface of the construction material. And at least a step of forming the reflecting portion.

<2> Construction materials.
The construction material is a member used for construction purposes, which is composed of one or more planar bodies.
As an example of the construction material, there is a ventilation spacer for securing a ventilation layer between a wall material or a base plate and a heat insulating layer.
Construction materials include paper, wood and other materials.

<3> Reflecting part.
The reflection part is an element for imparting a heat shielding function to the construction material.
The reflecting portion applies or prints a coating or ink containing one or more kinds of metal powders on a part or all of the surface of at least one of the one or more planar bodies. To form.

<3.1> An example of paint or ink.
As the paint or ink, an aqueous flexo ink containing metal powder can be used.
A known metal material can be adopted as the metal powder. For example, aluminum can be used when forming a reflection part of a silver surface.

<3.2> Formation region of the reflection portion.
The area where application or printing with paint or ink is performed may be formed on the entire surface of the construction material, or may be formed in part. However, the heat shielding function is limited to a range that satisfies a desired standard.
Improvement of the design of this product, display of the reference line when cutting this product according to the slope of the roof, product, etc., by the region provided with the reflective part or the region not provided with the reflective part, or a combination thereof It is also possible to display products such as names and company names.

<3.3> A method for forming the reflecting portion.
The following method can be used as a method for forming the reflecting portion.
(1) Method by application.
The application work with paint is carried out manually or mechanically by brush or roller spray. The coating includes vapor deposition.

(2) A method by printing.
Printing with ink is performed using a printing machine (silk printing / patt printing). Note that printing includes transfer.

(3) Formation by multilayer structure.
The reflective portion may have a multilayer structure by repeating a plurality of steps so that the same or different paint or ink is undercoated and then overcoated in the coating or printing step.

<4> Other configurations.
A separate protection part may be provided on the upper surface of the reflection part.
A general clear coat agent such as a varnish can be used for the protective part, and the protective part can be formed by the above-described application or printing method.
Similarly to the reflective portion, the protective portion may have a multilayer structure by repeating a plurality of steps so that the same or different paint or ink is undercoated and then overcoated.

An example in which the present invention is applied to a ventilation spacer for securing a ventilation layer between a field board and a heat insulating layer in a wooden house will be described with reference to FIGS.
<1> Overall shape of the ventilation spacer.
The ventilation spacer shown in FIG. 1 is composed of a single planar body A having a square shape.
The planar body A is provided inside the bent portion A12 that can be folded back while maintaining the continuity of the base A1, the bent portions A2 provided at opposite ends of the base A1, and the bent portion A12. It consists of a folded portion A13.

<2> Planar body.
As the planar body A, a cardboard 10 made of kraft paper is used.
As shown in FIG. 2, the cardboard 10 according to the present embodiment is a so-called double-sided cardboard, and includes a core 11 and liners 12 a and 12 b bonded to the top of the core 12.
Among these, it is preferable to use a known white liner for the liner 12b on the side where the reflection part B to be described later is provided, from the viewpoint of improvement in reflection performance and excellent paint or ink adhesion.

<3> Surface processing to a planar body.
In this embodiment, the reflecting portion B and the protective layer C are provided on the entire surface (back surface) of the planar body A on the outdoor side.
The reflection part B is composed of an undercoat layer and an overcoat layer in order from the side close to the back surface.
The protection part C is composed of a top coat layer that covers the reflection part.
Water-based flexographic ink is used as the type of paint or ink in each part.
The paint or ink of each part is shown in Table 1 below.
[Table 1]

<4> Overview of each part.
Next, the outline of the paint or ink used for forming each part will be described.

<4.1> A composition example of the reflection portion.
Table 2 below shows an example of the composition of the silver ink used as the paint or ink constituting the reflection part B.
[Table 2]

<4.2> Composition example of protective part.
Table 3 below shows an example of the composition of the varnish used as the paint or ink constituting the protective part C.
[Table 3]

<5> Functional comparison.
FIG. 3 shows the results of measuring the moisture permeability and heat shielding performance under the same conditions for the ventilation spacer to which the present invention is applied.
Case 1 is a configuration according to the present invention, case 2 is a configuration in which a conventional metal vapor deposition layer made of non-woven fabric is provided, and case 3 is a measurement result by a configuration using only kraft paper.

As shown in FIG. 3, Case 1 has a higher moisture permeability coefficient than Cases 2 and 3, so it is inferior in moisture permeability, but ensures moisture permeability required for general wooden houses. I understand that.
Moreover, compared with cases 2 and 3, case 1 has improved sunshine reflectance and emissivity test values, indicating that it has an excellent heat shielding function.

The present invention also includes a configuration provided with a slit that is formed by penetrating the planar body A or being cut thinner than the thickness of the planar body within a range in which the strength of the entire product can ensure a desired condition. (Not shown).
The portion where the slit is provided may be a region where the reflecting portion B is provided or a region where the reflecting portion B is not provided. By providing this slit, moisture permeability can be further adjusted.

A Planar body A1 Base A2 Folded part A3 Folded part B Reflective part C Protective part 10 Corrugated cardboard 11 Core 12a Liner 12b Liner 20a Undercoat part 20b Topcoat part 30 Topcoat layer

Claims (6)

A ventilation spacer for securing a ventilation layer between a wall material or a field board and a heat insulating layer,
It has a reflective part formed by applying or printing a paint or ink containing one or more metal powders on a part or all of the surface of the ventilation spacer,
Ventilation spacer.   The ventilation spacer according to claim 1, wherein the at least one metal powder includes an aluminum powder.   The ventilation spacer according to claim 1, wherein the main body is corrugated paper.   The ventilation spacer according to any one of claims 1 to 3, wherein a slit is provided on a surface of the ventilation spacer. A method for imparting a heat shielding function to construction materials,
At least a step of applying or printing a paint or ink containing one or more metal powders on a part or all of the surface of the construction material to form a reflective portion;
A method of imparting a heat shielding function to construction materials.   The heat insulation structure of a building using the ventilation material of any one of Claims 1 thru | or 4, or the construction material obtained by the method of Claim 5.

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