JPS6127410Y2 - - Google Patents

Description

[Detailed explanation of the idea]

The present invention relates to a base board suitable for use as a base material for buildings and structures, particularly for mortar walls. Generally known mortar base boards include lath-waterproof sheet-lath sheet, plywood-thin layer of cement composition, and gypsum lath board.
However, all of ~ had the disadvantage of lacking heat insulation, moisture proofing, and fireproofing properties. In particular, the workability during construction and the adhesion of the mortar composition were emphasized, so the material could not be passed as a quasi-noncombustible material. The main cause was harmful deformation due to cracks. In order to eliminate these drawbacks, the present invention utilizes the light weight of gypsum lath board and the adhesion properties of mortar composition, and provides a base board with improved heat insulation, moisture resistance, mechanical strength, and fire resistance. It is something. An embodiment of the base plate according to the present invention will be described in detail below with reference to the drawings. FIG. 1 is an explanatory diagram showing the base plate. In the figure, 1 is a substrate, for example gypsum lath board, base paper 1 for gypsum board.
a, and a recess 1 is formed on its surface.
A large number of b are provided, and it mainly functions as a mortar composition adhesion surface, a fireproofing material, and a rigid material. Reference numeral 2 is a foamable inorganic material that is impregnated into the flat base paper 1a' present on the back side of the substrate 1 among the base papers 1a, and this base paper 1a' is used as a reliable framework material for the inorganic foam layer formed under high heat. Effectively act on the substrate 1
This prevents cracks from forming. The foamable inorganic material 2 is one that releases crystal water under high heat and gradually expands to form an inorganic foam layer. Specific examples include borates, silicates, such as borax, sodium metaborate, water glass,
It is composed of one or more of sodium metasilicate, sodium phosphate, etc. 3 is a coating layer on the back side of the base paper for gypsum board 1a, which has the functions of waterproofing, moisture-proofing, and preventing deterioration of the foamable inorganic material, and also blocks contact between the foam raw material and the foamable inorganic material as described below. This makes the foam uniform in structure and improves adhesion to the foam. 4
The foam is composed of one type of foam such as polyisocyanurate foam or phenol foam, and the liquid raw material is discharged onto the base paper for plasterboard 1a', spread, and reacted with foam, making use of its self-adhesive properties at that time. They are bonded together and a form is formed at the same time. In particular, the foam 4 forms a carbonized layer under high heat, and functions as a heat insulating material, waterproof material, moisture proof material, or fire and hot air shielding material both under normal conditions and under high heat. 5
is a backing material that is essential for the sandwich structure of the base plate, and mainly functions as a reinforcing material, waterproofing material, moisture-proofing material, and radiation material. Specifically, aluminum foil 5a and sheet-like material 5b, e.g. It is laminated with kraft paper, asbestos paper, or nonwoven fabric. Of course, the sheet-like material 5b may be used alone or may be waterproofed or flame-retardantly treated. Next, a specific example will be briefly explained. As board 1, thickness 7mm, size 1800 x 900mm
Prepare a gypsum lath board and paste the base paper 1 on the back side
A' impregnated with foamable inorganic material 2 (water glass) is used. Note that the amount of water glass is such that it is not exposed from the surface of the gypsum board base paper 1a'. Furthermore, a melamine resin of 30 microns (dry) is formed on this back surface. For Form 4, Freon 11 was added to 100 parts by weight of polyisocyanurate foam raw material [Liquid A, the so-called polyol component was Hexacal F (trade name, manufactured by Nippon Polyurethane Co., Ltd.]).
40 parts by weight, product name Millionate 100 as liquid B
(manufactured by Nippon Polyurethane Co., Ltd.), 656 parts by weight of Freon 11, 200 parts by weight of Freon 11, and 140 parts by weight of fumaric acid added thereto] was foamed by a one-shot method.
The foaming conditions are as follows: The raw material liquid temperature is 20℃, and the mold temperature is 20℃.
Set the curing at 90℃ for 30 minutes and the board temperature to 50℃. Further, as the backing material 5, a sheet-like material made by laminating aluminum foil with a thickness of 0.05 mm and kraft paper with a thickness of 0.1 mm is used. Therefore, the foam raw material is discharged onto the back surface of the substrate 1, and the backing material 4 is laminated thereon, and is spread to form a foam material with a total thickness of 20 mm and a foam density.
A base plate of 30Kg/m ³ was manufactured. The fireproof performance of this base plate was as shown in the table below. The test method is JIS
-A-1321, where A is a surface test and B is a perforation test.

[Table] As can be seen from the table above, even if gypsum lath board is used, it can be a material that can sufficiently pass the test as a quasi-noncombustible material. In addition, the coating layer 3 not only has an effective effect on long-term water resistance and moisture resistance, but also prevents contact between the foam raw material and the foamable inorganic material, promotes effective foaming, and maintains the homogeneous foam structure and desired properties. Achieves molecular bonding and creates a foam structure that is more fire and heat resistant.
Moreover, it is useful for improving adhesiveness. As mentioned above, according to the base plate according to the present invention,
Even with the thickness and shape of the board as described above, it has characteristics that allow it to pass as a quasi-noncombustible material. Further, it has the feature that it can be manufactured easily and without adversely affecting the formation of the form 3 by effectively utilizing the base paper for gypsum board and ensuring a fireproof layer between the form 4 and the substrate 1. Furthermore, the foam's closed-cell structure and structural materials are bonded together to achieve thermal insulation, moisture-proofing, and waterproofing properties, resulting in significantly improved mechanical strength. In addition, it has the characteristics that water resistance and durability are significantly improved, and the foam raw material can be effectively reacted and foamed by preventing contact with foamable inorganic materials.

[Brief description of the drawings]

FIG. 1 is an explanatory diagram showing an embodiment of the base plate according to the present invention, and FIG. 2 is an explanatory diagram showing an enlarged portion A in FIG. 1. DESCRIPTION OF SYMBOLS 1... Substrate, 2... Foamable inorganic material, 3... Coating film layer, 4... Foam.

Claims (1)

[Scope of utility model claims] A base paper for gypsum board on the back side of a gypsum lath board is impregnated with a foamable inorganic material that gradually expands while releasing crystallized water under high temperature, and the base paper is coated with a coating layer, and a backing layer is made by laminating at least aluminum foil. One of the foams such as polyisocyanurate foam and phenol foam that is discharged in a liquid state between materials, reacted and foamed, and the self-adhesive properties at that time fix them together and form a closed cell structure. A base plate characterized by forming seeds.