Lath for exterior wall ventilation construction

Abstract

To provide lath for exterior wall ventilation construction that is less susceptible to climate changes (mainly heat) compared to conventional hot melt and emulsion adhesives, is less likely to peel off even when subjected to trowel pressure when applying mortar, and is excellent in workability, quality, and economy.SOLUTION: A backing material 2 is bonded to a lath material 1 with a caulking agent 3. The caulking agent 3 is a silicone caulking agent, an acrylic caulking agent, an urethane caulking agent, a modified silicone caulking agent, or a polyurethane caulking agent.SELECTED DRAWING: Figure 2

Description

[Technical Field]

[0001] This invention belongs to the technical field of lath for exterior wall ventilation construction, which is constructed by integrating lath material and backing material and is used to realize a ventilation structure for the exterior wall of a building. [Background technology]

[0002] In recent years, when constructing the exterior wall structure of a building, a mortar-coated exterior wall ventilation method has been widely adopted to solve problems of moisture and condensation caused by rainwater and humidity, which creates a ventilation layer between the base material and the mortar wall. In this exterior wall ventilation method, in order to form the ventilation layer, lath for exterior wall ventilation method is often used, in which a backing material is integrated into the back side of the lath material used to construct the mortar wall (see, for example, Patent Documents 1 and 2). [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Publication No. 2018-165433 [Patent Document 2] Japanese Patent Application Laid-Open No. 2012-097521 Summary of the Invention [Problem to be solved by the invention]

[0004] Conventional lath for exterior wall ventilation construction methods is often constructed by using paper (for example, tarpaulin paper, polymic paper, breathable waterproof paper) or nonwoven fabric as the backing material, and adhering it to the lath material using an adhesive (hot melt or mainly emulsion-based adhesive, etc.) (see paragraph

[0024] of the same document 1 and paragraph

[0026] of the same document 2).

[0005] However, the hot melt adhesive has the problem of softening and dissolving easily in high-temperature environments such as summer. Furthermore, the emulsion adhesive does not soften easily even in high-temperature environments, but because it is a water-based adhesive, it has the problem of easily dissolving due to rainwater or moisture. Although mortar application work is not carried out in rainy weather, there is a risk of the adhesive becoming wet due to sudden rainfall, etc. Therefore, conventional hot melt and emulsion adhesives tend to dissolve due to changes in weather, etc., resulting in the backing material easily peeling off from the lath material, or even if it is not peeling off, it can easily peel off due to the pressure of the trowel when applying mortar.

[0006] Therefore, the present invention was devised in consideration of the problems of the background art described above, and its purpose is to provide a lath for use in exterior wall ventilation construction methods that is less affected by climate changes (mainly thermal effects) than conventional hot melt and emulsion adhesives, is less likely to peel off even when subjected to trowel pressure when applying mortar, and is excellent in workability, quality, and economy. [Means for solving the problem]

[0007] As a means for solving the problems of the above-mentioned background art, the lath for exterior wall ventilation construction method according to the invention described in claim 1 is characterized in that a backing material is adhered to the lath material with a caulking agent.

[0008] The invention described in claim 2 is characterized in that, in the lath for exterior wall ventilation construction described in claim 1, the caulking agent is a silicone caulking agent, an acrylic caulking agent, a urethane caulking agent, a modified silicone caulking agent, or a polyurethane caulking agent. [Effects of the Invention]

[0009] The lath for exterior wall ventilation construction method according to the present invention has the following effects. (1) It was found that even when the backing material was bonded to the lath using caulking, the adhesive strength was equal to or greater than that of conventional hot melt or emulsion adhesives. Moreover, since caulking is inherently waterproof, it also has the advantage of being resistant to moisture. (2) Caulking agents also have the advantage of being less susceptible to the effects of climate change (external influences) such as heat and cold. (3) The caulking agent retains its elasticity even after hardening, which has the advantage of preventing the lath material and backing material from peeling off (completely). (4) Caulking agents have the advantage of being quick to dry to the touch and less susceptible to temperature effects, making them suitable for mass production. (5) When installing lath, by fastening staples to the areas where the caulking agent is applied, the elastic effect of the caulking agent can be expected to improve water-tightness. (6) By scattering caulking at the stapled areas, the caulking acts as a marker for the stapled areas, enabling efficient lath installation. When using the caulking as a marker, it is more effective to color the caulking black or gray, as this makes it easier for workers to see. (7) In summary, it is possible to provide lath for exterior wall ventilation construction methods that are excellent in workability, quality, and economy. In turn, it is possible to realize the construction of high-strength, high-rigidity, and high-quality mortar walls. [Brief explanation of the drawings]

[0010] [Figure 1] 1 is an exploded perspective view showing lath for an exterior wall ventilation construction method according to the present invention, in which the adhesive bonded portions formed by caulking are omitted for the sake of convenience. [Figure 2] 1 is an elevation view showing a lath for an exterior wall ventilation construction method according to Example 1 of the present invention. [Figure 3] FIG. 3 is an enlarged view of a main part of the lath for the exterior wall ventilation construction method shown in FIG. 2. [Figure 4] FIG. 10 is an elevation view showing lath for an exterior wall ventilation construction method according to Example 2 of the present invention. [Figure 5] FIG. 5 is an enlarged view of a main part of the lath for the exterior wall ventilation construction method shown in FIG. 4. [Figure 6] FIG. 10 is an elevation view showing a lath for an exterior wall ventilation construction method according to Example 3 of the present invention. [Figure 7] FIG. 7 is an enlarged view of a main part of the lath for the exterior wall ventilation construction method shown in FIG. 6. DETAILED DESCRIPTION OF THE INVENTION

[0011] Next, an embodiment of the lath for the exterior wall ventilation method according to the present invention will be described with reference to the drawings.

[0012] The lath 10 for the exterior wall ventilation method according to the present invention is laid on a base material prior to the application of mortar, and as shown in Figures 1 to 7, is made up of a lath material 1 and a backing material 2 bonded to it with a caulking agent 3. For convenience of illustration, the caulking agent 3 is shown by a dashed line (dotted line). The lath material 1, the backing material 2, and the caulking agent 3, which are components of the lath 10 for the exterior wall ventilation construction method, will be specifically described below.

[0013] The lath material 1 can be implemented using various lath materials, such as wire mesh (welded wire mesh), expanded metal, ribbed lath, diamond lath, corrugated lath, and lath with ribs, which are laths with horizontal and / or vertical ribs appropriately arranged on these. In this embodiment, expanded metal 1 is used as an example only.

[0014] The backing material 2 can be any material used as a backing material 2 for lath used in exterior wall ventilation construction, such as tarpaulin paper, polymic paper, nonwoven fabric sheets, resin mesh sheets, or organic sheets such as polypropylene and polyethylene. As such, the caulking agent 3 has the advantage that it can be used regardless of the type of backing material 2, since it can be bonded at room temperature.

[0015] The caulking agent 3 is preferably a silicone caulking agent, an acrylic caulking agent, a urethane caulking agent, a modified silicone caulking agent, or a polyurethane caulking agent. In other words, the caulking agent 3 used as the adhesive of the present invention can be of any type as long as it is a caulking agent 3. This is because the caulking agent 3 can maintain sufficient adhesive strength to prevent the lath material 1 and the backing material 2 from peeling off from the time the mortar is applied until the mortar hardens.

[0016] Caulking agent 3 has traditionally been used primarily to waterproof areas by applying it to those areas, but not as an adhesive. The present applicant has recently focused on the superior adhesive strength, dry-to-touch time, post-dry elasticity (texture), and price of caulking agent 3, which had not previously been used in lath technology for exterior wall ventilation construction. The significance of the present invention lies in its use as an adhesive to bond lath material 1 and backing material 2. Specifically, caulking agent 3 has excellent waterproofing properties, making it resistant to moisture and less susceptible to the effects of climate change (external influences) such as heat and cold. Because caulking agent 3 retains its elasticity even after hardening, it can adapt to deformations such as bending of the lath material due to trowel pressure when applying mortar, thereby preventing (complete) separation between lath material 1 and backing material 2. Caulking agent 3 also has the advantage of being suitable for mass production due to its short dry-to-touch time. In other words, the applicant, after considering the various advantages mentioned above, discovered that caulking agents, which have traditionally been used exclusively for waterproofing (waterstopping), actually have an attribute of excellent adhesiveness for bonding components together. He determined that this attribute makes them suitable for bonding lath material 1 and backing material 2 in lath technology for exterior wall ventilation construction, and therefore has now filed a patent application.

[0017] In this embodiment, the silicone caulking agent 3 is used as an example. Generally, the applicability of a caulking agent as an adhesive between the lath material 1 and the backing material 2 is judged mainly from the five viewpoints of adhesive strength, heat resistance, deformation followability, tack-free time, and watertightness. In all five of these aspects, the caulking agent 3 is superior to conventional hot melt and emulsion adhesives, but among the caulking agents 3, the silicone caulking agent 3 used in this example is particularly excellent in adhesive strength and heat resistance, making it suitable as an adhesive between the lath material 1 and the backing material 2.

[0018] The adhesive form of the caulking agent (silicone caulking agent) 3 for the lath material 1 and the backing material 2 needs to be strong enough to prevent the lath material 1 and the backing material 2 from peeling off, so a wide variety of implementation variations are possible. Among these, three examples of typical bonding forms are given below.

[0019] 2 and 3 show Example 1, in which adhesive joints formed by the caulking agent 3, which are elongated in the horizontal direction, are formed in a staggered arrangement at predetermined intervals in the horizontal and vertical directions. The size and shape of the adhesive joints formed by the caulking agent 3 (e.g., a substantially rectangular shape of 50 to 70 mm in the horizontal direction), the spacing (e.g., about 70 to 100 mm in the horizontal direction and about 75 mm in the vertical direction), and the number (e.g., about 35 to 50 joints per lath) can be appropriately modified according to the structural design. In Figures 2 and 3, the adhesive joint using the caulking agent 3 is formed in a shape that is elongated in the horizontal direction, but it may also be formed in a shape that is elongated in the vertical direction, or in a shape that is elongated in an oblique direction.

[0020] 4 and 5 show Example 2, in which adhesive joints using elongated caulking agent 3 are continuously formed across the entire horizontal length of lath material 1, and are also formed in parallel at a predetermined interval (for example, about 75 mm) in the vertical direction. Although Example 2 uses more caulking agent 3 than Example 1, it has the advantage of being suitable for mass production because it can be manufactured by the simple operation of continuously applying caulking agent 3. In Figures 4 and 5, the adhesive joints made of caulking agent 3 are formed along the entire horizontal length of the lath material 1, but they may also be formed at approximately equal intervals along the entire vertical (top-to-bottom) length of the lath material 1, or they may be formed at approximately equal intervals along the entire diagonal length.

[0021] Figures 6 and 7 show Example 3, in which caulking agent 3 is applied to lath material 1 and backing material 2 by spot-adhering (e.g., approximately 20 mm in diameter) to create regularly spaced adhesive joints (e.g., 50-150 mm) in the vertical and horizontal directions. In Example 3, for example, by regularly distributing caulking agent 3 at staple locations, the adhesive joints (e.g., 50-150 mm) can serve as markers for the staple locations, enabling efficient lath installation. When used as markers, coloring the caulking agent 3 black or gray is more effective because it makes it easier for workers to see. Furthermore, according to Example 3, the elasticity of the caulking agent 3 allows the caulking agent 3 to deform and follow the staple tip when the staple is driven into the adhesive joint, ultimately maintaining waterproofing all the way to the back of the backing material 2, thereby enabling the construction of high-quality mortar walls.

[0022] Although the embodiments have been described above based on the drawings, it should be noted that the present invention is not limited to the illustrated examples and includes the range of design modifications and application variations that would normally be made by a person skilled in the art, provided that they do not deviate from the technical concept of the present invention. For example, as mentioned above, the adhesive forms using the caulking agent 3 in Examples 1 to 3 are merely examples of typical adhesive forms, and we would like to point out here that there are a wide variety of possible implementation variations. [Explanation of symbols]

[0023] 1 Lath material 2 Backing material 3 Caulking agent (adhesive part) 10 Lath for exterior wall ventilation construction

Claims

1. This lath for exterior wall ventilation construction method is characterized in that a backing material is bonded to the lath material with a caulking agent.

2. 2. The lath for exterior wall ventilation construction method according to claim 1, wherein the caulking agent is a silicone caulking agent, an acrylic caulking agent, a urethane caulking agent, a modified silicone caulking agent, or a polyurethane caulking agent.

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