JP2878140B2 - Mortar base sheet - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a mortar base sheet used for constructing an outer wall or the like.

[0002]

2. Description of the Related Art Conventionally, as shown in FIG. 2, when an outer wall 1 of a building such as a house is constructed, first, a waterproof asphalt-impregnated paper 3 is placed on a foundation 2 of the building.
With a staple 4 and a lath 5
Is attached by staples 4, and then, the undercoating mortar 6 and the overcoating mortar 7 are sequentially applied to finish. By the way, when finishing by applying the overcoat mortar 7, if the overcoat mortar 7 is applied immediately after applying the undercoat mortar 6, the undercoat mortar 6 is peeled off by its own weight. Then, the mortar 7 was applied, and then the mortar 7 was applied to finish.

[0003]

However, in the above-mentioned construction work, after the application of the undercoat mortar 6, the construction work must be interrupted for curing, which causes a problem of prolonging the construction work. Was. Moreover, when the undercoat mortar 6 is applied to the asphalt-impregnated paper 3, the moisture of the undercoat mortar 6 permeates through the needle holes of the staples 4, moistening the groundwork 2 of the building, causing corrosion and the like. There was fear.

The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a mortar base sheet that can be applied extremely easily without causing corrosion of the base.

[0005]

In order to achieve the above object, a mortar base sheet according to claim 1 is provided between a base and a mortar to be applied when an outer wall of a building such as a house is constructed. The mortar base sheet to be disposed, wherein the base side is formed of a moisture-permeable and waterproof nonwoven fabric layer formed of an elastic resin layer, and the outside is formed of a paper sheet layer having water absorption and water retention properties. It is characterized by. A mortar base sheet according to a second aspect is characterized in that, in the mortar base sheet according to the first aspect, a water-repellent agent having water repellency is applied to a surface of the paper-like sheet layer for a predetermined time.

[0006]

According to the mortar base sheet of the first aspect,
When the undercoat mortar is applied to the base of the building with staples or the like and then applied to the undercoat mortar, the moisture of the mortar is absorbed by the paper-like sheet layer and retained, so that the curing is accelerated. Thereby, after applying the undercoat mortar, it is possible to successively apply the overcoat mortar. In addition, the resin layer on the underside of the non-woven fabric layer ensures the sealing of the needle holes of the staple, and prevents the seepage of moisture from the needle holes.

According to the mortar base sheet according to the second aspect, even if water adheres to the surface of the paper sheet layer, the water is repelled. In other words, it is possible to eliminate shortage of water absorption at the time of mortar application due to rain or the like and the paper sheet layer containing water.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a mortar base sheet of the present invention will be described below with reference to the drawings. In FIG. 1, reference numeral 11 denotes a mortar base sheet of the present embodiment. The mortar base sheet 11 is composed of a nonwoven fabric layer 12 and a paper-like sheet layer 13 having a surface of the nonwoven fabric layer 12 spotted with an adhesive 15. The nonwoven fabric layer 12 has moisture permeability and waterproofness, and its underlayer is a resin layer 14 coated with an elastic resin.
The paper sheet layer 13 is excellent in water absorption and water retention, and a water repellent having water repellency is applied to the surface thereof for a predetermined time.

According to the mortar base sheet 11 of the above embodiment, the mortar base sheet 11 is attached to the base 2 with the paper-material sheet layer 13 side outward by the staples 4. When the undercoat mortar 6 is applied by attaching the lath 5 to the front side with the staples 4 and applying the undercoat mortar 6, the water-repellent effect of the water-repellent agent is reduced after a lapse of a predetermined time, and the water of the undercoat mortar 6 is transferred to the paper sheet layer 13. The water is absorbed and retained, whereby the undercoat mortar 6 is in a semi-cured state, so that the overcoat mortar 7 can be applied.

That is, after the undercoat mortar 6 is applied like the conventionally used asphalt impregnated paper 3,
In order to cure and cure this undercoat mortar 6, it is not necessary to suspend the work for a predetermined period, and the construction work can be shortened. In addition, the resin layer 14 coated on the nonwoven fabric layer 12 can ensure the sealing property in the needle holes of the staples 4, thereby reliably preventing the base 2 from being corroded due to the leakage of moisture from the needle holes. can do.

Further, water can be repelled by the water-repellent agent on the surface of the paper-like sheet layer 13, so that the paper-like sheet layer 13 is subjected to rain and the like and contains water, resulting in insufficient water absorption during mortar application. And other obstacles can be prevented. Further, since the paper sheet layer 13 is spotted on the nonwoven fabric layer 12 with the adhesive 15, the moisture permeability is not impaired by the adhesive 15.

The water repellent effect time of the water repellent of the above embodiment may be appropriately changed depending on construction conditions such as construction location, construction season, and weather at the time of construction. Further, in the above embodiment, the paper sheet layer 13 and the nonwoven fabric layer 12 are spotted with the adhesive 15, but the adhesive 15 is applied in a linear shape to bond the paper paper sheet layer 13 and the nonwoven fabric layer 12. Is also good.

[0013]

As described above, according to the mortar base sheet of the present invention, the following effects can be obtained. According to the mortar base sheet according to claim 1, when the undercoat mortar is applied by attaching a lath on the surface side by sticking to the base and applying the undercoat mortar, the moisture of the mortar is absorbed into the paper-like sheet layer and the water is retained after a predetermined time has elapsed. By doing so, the mortar is in a semi-cured state, and it is possible to apply a top coat mortar. That is, compared with the case of using a waterproof asphalt impregnated paper as in the past, after applying the undercoat mortar, in order to cure and cure the undercoat mortar, it is not necessary to suspend the work for a predetermined period,
The construction work can be shortened. Further, the sealing property in the needle holes of the staple can be ensured by the resin layer on the base side of the nonwoven fabric layer, whereby the corrosion of the base due to seepage of moisture from the needle holes can be reliably prevented. .

According to the mortar base sheet according to the second aspect, water can be repelled by the water repellent on the surface of the paper sheet layer, so that rain or the like is applied and the paper sheet layer contains moisture. Obstacles due to insufficient water absorption during mortar application can be reliably prevented.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view of a mortar base sheet illustrating the configuration and structure of a mortar base sheet of the present invention.

FIG. 2 is a perspective view of an outer wall of a building for explaining a construction procedure of the outer wall.

[Explanation of symbols]

 REFERENCE SIGNS LIST 1 outer wall 2 base 6 undercoat mortar (mortar) 7 overcoat mortar (mortar) 11 mortar base sheet 12 nonwoven fabric layer 13 paper sheet layer 14 resin layer

──────────────────────────────────────────────────続 き Continued on front page (58) Field surveyed (Int.Cl. ⁶ , DB name) E04F 13/04 108

Claims (2)

(57) [Claims] When constructing an outer wall of a building such as a house,
A mortar base sheet disposed between a base and a mortar to be applied, wherein the base side is made of a moisture-permeable and waterproof nonwoven fabric layer having an elastic resin layer, and the outside is water-absorbing and water-retaining. A mortar base sheet comprising a paper sheet layer having: 2. The mortar base sheet according to claim 1, wherein a water-repellent agent having water repellency is applied to the surface of the paper-like sheet layer for a predetermined time.