JP4415875B2 - Seam treatment material - Google Patents

Description

  The present invention relates to a seam treatment material attached to a seam between wall materials such as outer wall boards.

In many cases, the wall surface of a building is constituted by a plurality of wall materials such as an outer wall board arranged in parallel, and an exterior coating film is provided on the outside by painting. In such a wall surface, an interval between adjacent wall materials changes due to a change in temperature or the like, and as a result, a crack may occur in the exterior coating film.
As a method for solving such a problem, Patent Document 1 discloses a belt-like shape made of a silicone resin or the like between an adhesive layer adhered so as to cover a seam between wall materials and an elastic seal material on the outside thereof. A method of using a seam treatment material provided with a fluidized bed is disclosed. By sticking such a seam treatment material so as to cover the seam between the wall materials, the adhesive layer of the seam treatment material follows such a change when a force that changes the interval of the wall material acts. However, such force is absorbed and relaxed in the fluidized bed between the adhesive layer and the elastic sealing material, and hardly reaches the elastic sealing material. Therefore, by using such a seam treatment material, it is possible to suppress cracks in the exterior coating film that occur when the interval between adjacent wall materials changes.
Japanese Patent No. 3096188

  However, when such a seam treatment material is used, there has been a problem that the outer wall coating film of the portion corresponding to the seam swells to the outside over time due to a change in temperature or the like.

  This invention is made | formed in view of the said situation, and makes it a subject to provide the seam processing material which can prevent not only the crack of an exterior coating film but the swelling.

The first seam treatment material of the present invention includes an adhesive layer that is attached so as to cover a seam between wall materials, a reinforcing layer that includes at least one layer provided outside the adhesive layer, the adhesive layer, and the reinforcement A buffer having a buffer portion formed between the layers , wherein the buffer portion is composed of a portion where the buffer material is present and other portions, and the portion where the buffer material is present and Any of the other parts are scattered, or the part where the buffer material exists is provided intermittently .
The second seam treatment material of the present invention is any one of the adhesive layer adhered so as to cover the seam between the wall materials, the reinforcing layer composed of a plurality of layers provided outside the adhesive layer, and the plurality of layers It is of strip and a buffer section formed in an interlayer of the buffer portion includes a portion that is present in the buffer material, consists of a remaining portion, the portion and the other is present in the buffer material Any one of the parts is scattered, or the part where the buffer material exists is provided intermittently .
It is preferable that the area ratio of the part in which the buffer material exists among the buffer parts is 25 to 72%.
Moreover, it is preferable that the said buffer material is provided by gravure printing.

  ADVANTAGE OF THE INVENTION According to this invention, the joint processing material which can prevent not only the crack of an exterior coating film but the swelling can be provided.

The present invention will be described in detail below.
FIG. 1 is a plan view showing a seam treatment material 10A of the present embodiment, and FIG. 2 is a cross-sectional view showing a state where the seam treatment material 10A of FIG.
The seam treatment material 10 </ b> A in this example covers the seam C between the wall materials W, that is, the adhesive layer 11 that is stuck so as to straddle the adjacent wall materials W, and the reinforcement provided on the outside of the adhesive layer 11. It has a band-like shape having a width W ₁ of 5 cm and the layer 12.
The adhesive layer 11 is made of, for example, an acrylic resin, polyvinyl acetate, or the like, and has a thickness of about 10 to 50 μm.
In this example, the reinforcing layer 12 is formed of a rubber 13 having a nonwoven fabric 14 disposed therein. Examples of the rubber 13 include acrylic rubber, polychloroprene rubber, and polyurethane rubber. The nonwoven fabric 14 is made of nylon, polyester, rayon, polyacrylic ester, polypropylene, vinylon, polyethylene, polyurethane, cupra, or the like. The reinforcing layer 12 in this example is formed to a thickness of about 100 to 200 μm, and the nonwoven fabric 14 has a mass per unit area of 10 to ²⁰ g / m ² .

And between the adhesion layer 11 and the reinforcement layer 12, the buffer part 16 in which the buffer material 15 was partially provided is formed, and the buffer part 16 is the part in which the buffer material 15 exists, and other than that It consists of parts. In this example, a square cushioning material 15 formed of a silicone resin and having a thickness of about 2 to 8 μm and a side length X of 2 mm is regularly provided in a staggered manner with a span S of 1 mm. The buffer part 16 is formed.
Further, the buffer section 16 of this example, the center in the width direction of the seam processing member 10A, is provided in the width W ₂ than the seam C. Then, both end portions in the width direction of the seam processing member 10A has a cushioning material absence portion 17 having a width W ₃ of the buffer material 15 is not present at all. In this example, the width _{W 2} 3 cm, a width _{W 3} is a 1 cm.

When such a seam treatment material 10A is adhered along the seam C of the wall material W as shown in FIG. 2, when a force that widens the interval between the wall materials W is applied, the seam treatment material 10A is in direct contact with the wall material W. The pressure-sensitive adhesive layer 11 extends following the spread. However, since the adhesive layer 11 and the reinforcing layer 12 are not fixed to each other in the portion where the buffer material 15 is provided, the force that widens the interval between the wall materials W is absorbed and relaxed by the buffer material 15, The reinforcing layer 12 is hardly reached. Therefore, even when such a force is applied, the exterior coating film (not shown) formed by painting on the outside of the reinforcing layer 12 does not crack.
Further, if the buffer material 15 is partially provided in this manner in the buffer portion 16, not only can the crack of the exterior coating film be prevented, but also the outer wall coating film corresponding to the joint C swells outward over time. It can also be suppressed. Although the reason why such a swelling suppressing effect is manifested is not clear, it is considered that some action that induces swelling is alleviated in a portion of the cushioning portion 16 where the cushioning material 15 does not exist. Such a swelling suppression effect is more effectively exhibited when the area ratio of the portion provided with the buffer material 15 in the buffer portion 16 having a length of 1 m is 20 to 90%.
In addition, you may use an adhesive agent for the adhesion of 10 A of seam treatment materials as needed. Further, a base treatment or undercoating may be applied to the target portion of the wall material W before sticking.

In addition, as in the example of FIG. 1, when the square cushioning material 15 having a certain size is scattered in a staggered manner with a certain span S, the length X of one side of the cushioning material 15 is 2 to 2. When the span S is 1 to 4 mm at 6 mm, both the crack suppression effect and the swelling suppression effect of the exterior coating film are very excellent. Further, as shown in FIG. 3, the cushioning material 15 may be provided in a pattern in which circular cushioning materials 15 having a certain size are scattered in a staggered pattern. D is at 2 to 6 mm, span shown in the figure _{S 1} 2 to 9 mm, the spans indicated by _{S 2} is a 2 to 6 mm, and suppression blister and crack inhibition effect of the outer coating are both very excellent. Further, as long as the cushioning material 15 is partially provided in the cushioning portion 16, the shape, size, span, and the like are not limited, and the arrangement pattern thereof is a regular pattern such as a staggered pattern as well as a regular pattern. It may be a pattern with no sex. Further, the shape and size of each cushioning material 15 may be different.
Further, as shown in FIGS. 4 and 5, the portion of the buffer portion 16 where the buffer material 15 is provided and the portion where the buffer material 15 is not provided are patterns reversed from those in FIGS. 1 and 3. Alternatively, as shown in FIG. 6, the buffer material 15 may be provided intermittently in the buffer portion 16.

  The buffer material 15 can be provided by gravure printing. That is, using a transfer roll in which recesses corresponding to the arrangement pattern of the buffer material 15 are formed, the raw material liquid of the buffer material 15 is poured into the recesses of this transfer roll, and the excess raw material liquid is removed with a spatula or the like. It may be transferred to the surface of the layer 11 or the reinforcing layer 12.

In the above example, the cushioning material non-existing portions 17 are formed at both ends, but they are not necessarily formed.
Moreover, although the reinforcement layer 12 of this example is formed from the rubber | gum 13 by which the nonwoven fabric 14 is arrange | positioned inside, the reinforcement layer does not need to have a nonwoven fabric and may be two or more layers.
Furthermore, the widths W ₁ , W ₂ , W _3, etc. of each part can be set as appropriate according to the width of the joint C, the structure of the joint C, and the like. Moreover, you may provide a release paper suitably in the exposed surface of the adhesion layer 11. FIG.

  FIG. 7 exemplifies still another embodiment. The seam treatment material 10 </ b> F includes a first reinforcing layer in which the reinforcing layer 12 has a two-layer structure and the nonwoven fabric 14 is arranged inside the rubber 13. 12a is not only provided, but also a second reinforcing layer 12b made of rubber is provided inside thereof, and not only between the adhesive layer 11 and the reinforcing layer 12, but also between the first reinforcing layer 12a and 1 is different from the seam treatment material 10A of FIG. 1 in that a buffer portion 16 is provided between the second reinforcing layer 12b. The first reinforcing layer 12a preferably has a thickness of about 100 to 200 μm, and the second reinforcing layer 12b has a thickness of about 20 to 50 μm.

  In such a seam treatment material 10F, the first reinforcement layer 12a and the second reinforcement layer 12b are not fixed to each other in the portion where the cushioning material 15 is provided. Therefore, when this seam treatment material 10F is adhered to the seam of the wall material, when a force that widens the interval between the wall materials acts, such a force is applied to the adhesive layer 11 and the second reinforcing layer 12b in the same manner. Although acting, it is absorbed by the buffer material 15 and hardly reaches the first reinforcing layer 12a. Therefore, even when the exterior coating film is formed on the outside and a force that increases the interval between the wall materials acts, the exterior coating film on the outside of the reinforcing layer 12 is hardly cracked. Furthermore, even in the case of this example, since the buffer material 15 is partially present, it is possible to prevent the exterior coating film from swelling with time, as well as cracking of the exterior coating film.

Hereinafter, the present invention will be specifically described with reference to examples.
[Examples 1 to 10]
A seam treatment material having a width W ₁ of 5 cm having the configuration shown in FIG. 1 was produced.
The adhesive layer was formed from an acrylic resin and the thickness was 20 μm. The reinforcing layer was a non-woven fabric made of polypropylene (12 g / m ² ) disposed inside the acrylic rubber and had a thickness of 150 μm.
Between the adhesive layer and the reinforcing layer, a buffer portion width W ₂ disposed so as to be 3 cm, on either side of the buffer section provided with the cushioning material absence portion in the width W ₃ 1 cm. Moreover, the buffer part was formed by providing the buffer material which consists of squares partially. The buffer material was provided in a staggered manner on the surface of the reinforcing layer by gravure printing of a silicone resin (manufactured by Toray Dow Corning Silicone Co., Ltd., SRX-370). The thickness was 5 μm. Table 1 shows the area ratio (%) of the part where the buffer material is provided in the buffer part having a length X of one side of the buffer material, the span S, and the length of 1 m.
The obtained seam treatment material was evaluated as follows. The results are shown in Table 1.

[Evaluation]
(1) Crack test of exterior coating film (elongation test: zero span tension measurement)
Two slate plates were arranged, and the seam treatment material obtained in each example was adhered to the joint so that the adhesive layer side was in contact with the slate plate. Thereafter, an acrylic resin paint was applied to the outside of the seam treatment material to form an outer coating film having a thickness of 500 μm, and the test piece was left for 14 days.
Tension was applied at a rate of 5 mm / min so that the width of the joint of the slate plate in the test piece was widened, and the width of the joint when a crack occurred in the exterior coating film was measured. At this time, the test environment temperature was set to 5 ° C. In addition, after applying an epoxy resin (Bond E200 manufactured by Konishi Co., Ltd.) to a thickness of 0.5 mm in advance on the surface of the slate plate, it is allowed to stand at room temperature for 30 minutes and cured to give a ground treatment. I left it.
The case where the measured seam width (minimum width of the seam at which the exterior coating film cracks) is 10 mm or more is shown as “good” in the table, and the case where it is less than 10 mm is shown as “fail”.
(2) Swelling test of exterior coating film (swelling test: hot / cold cycle test)
A test piece was produced in the same manner as in the above (1), and this test piece was held at −5 ° C. for 3 hours and then held at 75 ° C. for 3 hours as one cycle, for a total of 40 cycles. Then, the presence or absence of the swelling of the part corresponding to the joint in an exterior coating film was evaluated visually.
The case where no blistering was observed by visual observation is shown in the table as ◯, and the case where swelling was recognized as x.

[Examples 11 to 18]
The shape of the buffer material is circular, except that the diameter D, and the span S ₁ and S ₂ and the values shown in Table 2, in the same manner as in Example 1, to produce a seam processing material having the configuration shown in FIG. 3, Evaluation was performed in the same manner. The results are shown in Table 2.

[Comparative Example 1]
The buffer material was gravure printed in a strip shape to form a buffer part. That is, the buffer material was provided in the whole buffer part. Otherwise, the seam treatment material was produced in the same manner as in Example 1 and evaluated in the same manner. The results are shown in Table 2.

[Comparative Example 2]
A seam treatment material having no buffer part and composed of an adhesive layer and a reinforcing layer was produced and evaluated in the same manner. The results are shown in Table 2.

As is apparent from the table, by using a seam treatment material in which a buffer material is partially provided to form a buffer part, the minimum width of the seam at which a crack occurs in the exterior coating film is 10 mm or more, and a crack suppression effect is exhibited. did. Further, no blistering of the exterior coating film was observed in the temperature / cool cycle test.
On the other hand, in the joint treatment material of Comparative Example 1 in which the cushioning material is provided in a band shape throughout the buffer portion, the minimum width of the seam at which the crack is generated in the exterior coating film is 10 mm or more. Swelling was observed. Further, in the seam treatment material of Comparative Example 2 in which no buffer portion was formed, although the outer coating film was not swollen by the heating / cooling cycle test, the minimum width of the seam at which the outer coating film cracks was 5 mm. The crack suppression effect was not obtained.

It is a top view which shows an example of the seam processing material of this invention. It is sectional drawing which shows the state which stuck the seam treatment material of FIG. 1 to the seam between wall materials. It is a top view which shows another example of the seam processing material of this invention. It is a top view which shows another example of the seam processing material of this invention. It is a top view which shows another example of the seam processing material of this invention. It is a top view which shows another example of the seam processing material of this invention. It is sectional drawing which shows another example of the seam processing material of this invention.

Explanation of symbols

W Wall material C Seam 10A to 10F Seam treatment material 11 Adhesive layer 12 Reinforcement layer 12a First reinforcement layer 12b Second reinforcement layer 15 Buffer material 16 Buffer part

Claims (4)

An adhesive layer which is adhered to cover the seams between wall material, and at least one layer consists of a reinforcing layer provided on the outer side of the adhesive layer, and the buffer portion formed between the reinforcing layer and the adhesive layer A belt-like seam treatment material having
The buffer portion is composed of a portion where a buffer material is present and other portions,
Wherein either of existing portion and the other portion of the cushioning material is scattered, or seam processing member existing portion of the buffer material and being provided intermittently. Having an adhesive layer which is adhered to cover the seams between wall material, a reinforcing layer comprising a plurality of layers provided on the outer side of the adhesive layer, and a buffer portion formed in either of layers of said plurality of layers A belt-like seam treatment material,
The buffer portion is composed of a portion where a buffer material is present and other portions,
Either the portion where the cushioning material is present and the other portion are scattered, or the portion where the cushioning material is present is provided intermittently . The seam treatment material according to claim 1 or 2, wherein an area ratio of a portion where the buffer material is present in the buffer portion is 25 to 72%.   The seam treatment material according to any one of claims 1 to 3, wherein the buffer material is provided by gravure printing.

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