JPH09144146A - Joint gasket and jointing method using same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a joint gasket, which can absorb the fluctuation of width and height of a joint and which has the excellent water-tightness, air-tightness and the adhesive reliability by providing plural triangle bar-shaped bodies in the cross direction of a lower surface of a band-shaped member. SOLUTION: Plural triangle bar-shaped bodies 20, 20 at a length shorter than the length of a band-shaped member 15 are provided in the cross direction of a lower surface of the band-shaped member 15 with the predetermined pitch in the longitudinal direction so as to form a joint gasket 14. Inside of joints 11 for various interior and exterior material such as a ALC plate, a floor formed of extruded concrete panels, walls and a ceiling is previously processed with the primer 12, and thereafter, the adhesive agent 13 is placed. The joint gasket 14 is inserted into the joint 11 for pressure-fixation. An air discharging passage is thereby formed inside of the joint 11, and the flowing direction of the adhesive agent 13 is regulated, and the dimensional fluctuation of the joint 11 and the joint gasket 14 is absorbed so as to improve the reliability of the adhesive force of the joint gasket 14.

Description

Detailed Description of the Invention

[0001]

TECHNICAL FIELD The present invention relates to an ALC plate, extruded concrete panel, PC plate, cement plate, brick, tile, glass block, natural stone, slate plate, metal plate,
A joint gasket which is used for joints of various interior / exterior materials on floors, walls, ceilings, etc. made of decorative boards, plywood, laminated boards, etc., which is easy to install, has high fixability and reliability, and a joint construction method using the same. It is related to.

[0002]

2. Description of the Related Art The conventional jointing method for the above-mentioned various interior / exterior materials is a driving method of a sealing material.
This has the following drawbacks. 1) The sealing method is poor in productivity and high in cost. 2) The curing reaction of the sealing material is easily affected by temperature and humidity, and the construction period becomes long. 3) Dust, mold, etc. adhere and are contaminated during the curing of the sealing material. 4) Skill level is required for joint finishing, and there is a problem in reliability of the sealing method. 5) Since the color type of the sealing material is limited, the design of the joint is restricted. Further, in the sealant construction method in which the sealing liquid is poured directly into the joints and solidified, the sealing liquid a is not filled in the lower corners of the side walls in the joints b, etc. as shown in the cross-sectional explanatory views in FIGS. 5 (a) and 5 (b). Therefore, there is a problem that the airtightness and the watertightness are deteriorated due to the formation of the voids c and the remaining bubbles d.

[0003]

Therefore, the object of the present invention is that the construction is easy, the skill is not required, and the productivity is excellent, so that the construction period can be shortened, and the contamination due to the adhesion of dust or mold can be achieved. There is no color, there is flexibility in coloring, it is excellent in designability, it is rich in compatibility because it can absorb fluctuations in joint width and height, the adhesive fluidizes by pressure insertion, the gap is filled and airtightness, Excellent adhesion reliability to enhance watertightness,
It is to provide a new joint gasket and a joint construction method using the same.

[0004]

As a result of intensive research for solving the above-mentioned problems, the present inventor has found that, as joint gaskets, a plurality of triangular rod-shaped members having a length shorter than the width of the strip-shaped member in the lower surface width direction thereof. However, assuming that they are provided at a predetermined pitch in the longitudinal direction, when the joint gasket is inserted after the adhesive is placed in the joint, the adhesive will not separate the bottom surface of the joint and the bottom surface of each triangular rod-shaped body. Since it moves in the width direction from the gap, the air and adhesive in the joint flow smoothly, filling the gap to improve airtightness and watertightness, improving the adhesion reliability, and the width and height of the joint. The inventors have found that the above-mentioned problems can be solved, such as the fact that even if there is some variation in the height, the band-shaped member can be absorbed by being placed upward, and the present invention has been reached. That is, the present invention is: 1) A joint gasket, characterized in that a plurality of triangular rod-shaped bodies having a shorter length than the strip-shaped member are provided in the width direction of the lower surface of the strip-shaped member at a predetermined pitch in the longitudinal direction, and 2) After treating the joint with a primer in advance,
The present invention relates to a joint construction method characterized in that an adhesive is placed and the joint gasket is inserted and fixed by pressing.

[0005]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, the present invention will be described in more detail with reference to the drawings. FIG. 1 shows an example of a joint gasket of the present invention. (A) is a front view, (b)
Is a side view. In the figure, 1 is a strip-shaped member, 2 is a plurality of triangular rod-shaped bodies provided on the lower surface in the width direction, each having a length shorter than the width of the strip-shaped member 1 and having a constant pitch in the longitudinal direction (see FIG. Are connected to each other), and when these are inserted into joints, a plurality of passages 4 in the width direction are formed between each triangular rod-shaped body 2 ... And the bottom surface (shown by the dotted line) 3 of the joint.
... is formed. 2 (a) to 2 (d) are side views showing different aspects of the joint gasket of the present invention. FIG. 2 (a) shows the triangular rod-shaped bodies 2 spaced apart from each other in the longitudinal direction of the belt-shaped member 1. 2 (b) is provided as a triangular rod-shaped member having a slender overall shape and a rounded tip 2a, which are provided at intervals in the longitudinal direction of the strip-shaped member 1. FIG. 2 (c) shows a triangular rod-shaped body having a rounded tip 2b, which is similarly connected to each other in the longitudinal direction. FIG. 2 (d) shows a triangular rod-shaped body having a rounded tip. It is the one 2c provided by connecting them in a corrugated shape in the longitudinal direction.

Of the joint gaskets described above, FIG. 1 and FIG.
As shown in FIGS. 2 (a) and 2 (b), the bottom of each triangular rod-shaped body 2 is deformed by vertical pressure, so that the joint depth or the joint gasket thickness is slightly changed. Even if it exists, it can be easily absorbed. 1 and 2
Since the joint gasket shown in (c) and FIG. 2 (d) has a large contact area with the adhesive filled in the gap with the joint, it can be firmly fixed to the joint. 3 (a) is a width L ₁ of the belt-shaped member 1 in the joint gasket, respectively, the length L ₂ of the triangular rod-like body 2, in sectional view showing the respective relationships of width L ₃ of the joint 5, another L ₁ < It is preferable that the relationship L ₃ <L ₂ is satisfied, so that even if the width and depth of the joint 5 are slightly changed, as shown in the cross-sectional explanatory view of FIG. It can be absorbed by the edge being upward.

The shape of the joint gasket is not limited to those shown in the above figures, but the length, height, pitch,
The inclination angle of the strip-shaped member 1 with respect to the bottom surface, the ratio of the length L ₂ of the triangular rod 2 to the width L ₁ of the strip-shaped member 1, and the like can be arbitrarily changed according to the cross-sectional shape of the joint 5. For example, the ratio of the height of the triangular bar 2 to the depth of the joint 5 is 1/3 to
The 1/2 position is preferable, and the pitch interval is preferably 7 to 10 mm. In the production of these joint gaskets, the entire body is integrally vulcanized by press molding, injection molding, or the like, or simultaneously vulcanized, or a method of vulcanizing after integral molding, on the bottom surface of the belt-shaped member obtained by extrusion molding, immediately after the die. A method of vulcanizing after attaching triangular rod-shaped bodies at a predetermined pitch, a method of vulcanizing by shaping into a final shape by mechanical means such as embossing, cutting after extrusion molding with a rod-shaped body, etc. are adopted. .

FIGS. 4 (a) to 4 (h) are vertical cross-sectional views showing, in the order of steps, a state in which a joint construction method is performed using the joint gasket shown in FIG. In this joint construction method, first, the primer 12 is applied to the side wall and bottom surface of the joint 11 and dried [FIG. (A)]. After drying, the adhesive 13 is inserted and arranged in the central portion of the joint 11 by means such as quantitative coating using a jig [FIG. (B)]. As the adhesive 13, a one-component or two-component room temperature curable, particularly reactive adhesive having a thixotropic property of fluidizing by pressing and not easily fluidizing by coating is used. . Next, the joint gasket 14 is inserted into the joint 11, and the surface thereof is pressed by using a pressing jig (not shown) such as a bamboo spatula, a metal spatula, and a rotating roll. 13 is sufficiently fluidized, the air in the joint 11 is pushed by the adhesive 13, and is discharged to the outside of the system through the gap between the outer peripheral edge of the band-shaped member 15 of the joint gasket 14 and the side wall of the joint 11 as shown by the arrow. [Figure (c)].

The pressed adhesive 13 is bonded to the belt-shaped member 15 and the joint.
While discharging air, the inside of the void surrounded by 11 is moved toward the lower corner 16 of the side wall of the joint 11 to fill the gap in the lower corner 16 [Fig. (D)], and the interior / exterior material around the joint 11 is further removed. It may be absorbed inside 17 [Fig. (E)], or the surplus adhesive 13 may enter the gap between the interior / exterior material 17 and the base material 18 through the above-mentioned void [Fig. (F)] to make a joint gasket. The void inside 14 is completely removed to ensure airtightness and watertightness. In addition, in this series of operations, the surplus adhesive 13 is bonded to the outer peripheral edge of the belt-shaped member 15 and the joint.
The joint 11 of the joint gasket 14 is adjusted while adjusting the application amount of the adhesive 13 and the pushing pressure of the joint gasket 14 so as not to protrude (19) from the gap with the side wall of the joint 11.
Install inside. The filler 13 that fills the band-shaped member 15 of the joint 11 reacts with moisture in the air to be cured, and thus the joint gasket.
14, the interior / exterior material 17, the base material 18 and the like are bonded and integrated to improve watertightness and airtightness.

As shown in the longitudinal cross-sectional view of the joint gasket 14 in the longitudinal direction in FIG. 1H, a plurality of triangular rod-shaped members 20 are provided on the lower surface of the belt-shaped member 15 at a constant pitch in the longitudinal direction. Therefore, the adhesive area with the filler 13 is wide, and the anchor effect further contributes to the improvement of the adhesive force. If the joint gasket is provided with irregularities by further roughening or corrugating the surface, it has an advantage that the adhesiveness with the adhesive 13 is improved and the stress is dispersed. According to the present invention, in addition to the above, improvement of productivity of joint material, shortening of construction period, prevention of contamination due to dust, etc. are achieved, joint finishing is not required, skill is not required for work, etc. There are advantages. The joint gasket is preferably made of a silicone material or a silicone-based composite material such as acrylic silicone, which makes it excellent in designability, durability, stain resistance, etc., which is free of coloring. Further, as these materials, it is particularly preferable to use only a reaction adhesion type silicone rubber-based material or a composite material of this and another rubber or resin material. Furthermore, the strip-shaped member 1 may be made of a silicone-based composite material such as acrylic silicone, and the triangular rod-shaped body 2 may be made of a silicone material, which gives an effect of preventing the oligomer from flowing out.

The reaction-adhesive type silicone rubber material includes a material which becomes a rubber-like elastic body by radical reaction cross-linking with an organic peroxide, an organohydrogenpolysiloxane and an addition-reaction curing catalyst typified by a platinum catalyst. An example is one that is cured by the added addition cross-linking,
More specifically, the average unit formula is represented by RaSiO _{(4-a) / 2} , in which a is 1.90 to 2.05, R is an alkyl group such as a methyl group, an ethyl group, a propyl group, a butyl group, or vinyl. Base,
Alkenyl groups such as allyl groups, phenyl groups, aryl groups such as tolyl groups, or chloromethyl groups in which some or all of the hydrogen atoms bonded to carbon atoms of these groups are replaced with halogen atoms, cyano groups, etc., 3,3 Same or different unsubstituted or substituted monovalent hydrocarbon groups such as 1,3-trifluoropropyl group, cyanomethyl group, etc., preferably 80 mol% of which is a methyl group and 0.1 to 0.5 mol% of which is a vinyl group. A certain organopolysiloxane having a viscosity at 25 ° C. of 100 cS or more, particularly 1000 cS or more, may be used as a base. It is desirable that the end of this organopolysiloxane is capped with a silanol group, a methyl group, or a vinyl group, and particularly, a terminal capped with a vinyl group.

The reaction-adhesive type silicone rubber material is generally a mixture of the above-mentioned organopolysiloxane and a silica-based filler. Examples of the filler include fumed silica, precipitated silica, quartz powder, diatomaceous earth and the like. Typical examples are those with a particle size of 50μ.
The amount is preferably m or less, and the addition amount may be in the range of 20 to 200 parts by weight with respect to 100 parts by weight of the organopolysiloxane. The reaction-adhesive silicone rubber material may contain, as a silica dispersant, a silane containing an alkoxy group, a silanol group, or the like, a low-molecular-weight siloxane, or an inorganic pigment for coloring. Examples of the organic peroxide used for the radical crosslinking include benzoyl peroxide, 2,4-dichlorobenzoyl peroxide, orthochlorobenzoyl peroxide, di-t-
Butyl peroxide, dicumyl peroxide, 2,5-
Examples include bis (t-butyl peroxide) -2,5-dimethylhexane. Reaction-adhesion type silicone rubber materials include condensation reaction type and addition reaction type. The condensation reaction type includes, for example, a deoxime type RT as a grade having a fast reaction rate.
V KE-45 [Product name of Shin-Etsu Chemical Co., Ltd., (CH ₃ ) ₂ C = NO (Si
O) _n N = C (CH ₃ ) ₂ ]. The addition reaction type is an organohydrogenpolysiloxane having at least two hydrogen atoms bonded to silicon atoms in the molecule and a platinum catalyst (chloroplatinic acid, chloroplatinic acid and alcohols, ethers, aldehydes, olefins, vinylsiloxanes). 1) to 10) for silicone rubber-based materials.
It can be obtained by adding in the range of 0 ppm.

Examples of the organohydrogenpolysiloxane include the following. Note that m in each equation,
n and p are positive integers.

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[0014]

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This addition amount is ≡SiH / ≡Si (CH = CH ₂ ) = 0.5 with respect to the vinyl group amount in the above-mentioned organopolysiloxane.
It may be set within a range that gives a range of to 5.0 (molar ratio). Further, it is also possible to use a sponge rubber obtained by adding a foaming agent, for example, azobis.iso.butyronitrile to a reaction adhesive type silicone rubber material. The uncured silicone rubber material should have a plasticity of 150-500. The width and the thickness are determined by the width and the length of the object and are pre-shaped. Both sides of this material must be covered with protective members made of polyethylene terephthalate, polycarbonate, polyvinyl chloride or the like to be protected from the outside. Among these, addition reaction type silicone rubber materials that react and cure at room temperature are particularly preferable, they can be colored freely and can be easily colored. By selecting a primer, all interior and exterior materials and base materials can be adhered. It has characteristics such as easy deformation by pressing and inserting.

[0016]

Next, specific embodiments of the present invention will be described with reference to examples. Example 1 Silicone rubber KE961U (trade name of Shin-Etsu Chemical Co., Ltd.) 100
Parts by weight, di-t-butyl peroxide C-8 as a curing agent
(Same as above) A mixture of 1.5 parts by weight and 1.0 part by weight of KE Color BB as a colorant (same as above) was sufficiently kneaded with two rolls, vulcanized at the same time as press molding, and a silicone-based material having the shape shown in FIG. Joint gasket made of material (thickness of band-shaped member: 5 mm, width L ₁ : 28 mm, height of triangular bar: 10 mm, length
L ₂ : 20 mm, pitch: 10 mm) was obtained. On the other hand, on a concrete base material, prepare a building material in which a ceramic cement board as an exterior material is pasted with a butyl rubber adhesive through a joint having a width L ₃ 25 mm and a depth of 20 mm, and first on the bottom of this joint. After applying an acrylic silicone-based primer and air-drying, place a reaction adhesive rubber (product of Shin-Etsu Polymer Co., Ltd.) with a width of 30 mm and a thickness of 15 mm as an uncured reaction adhesive type silicone rubber material in the joint, and above the joint gasket from above. Was inserted and pressed and fixed by a jig such as a roll. The joint gasket made of silicone material was bonded and fixed to the concrete base material and the ceramic cement board by the reaction adhesive rubber in the joint, and the airtightness or watertightness was secured.

Example 2 Silicone rubber KE561U (trade name of Shin-Etsu Chemical Co., Ltd.) 100
Parts by weight, bis-2,4-dichlorobenzoyl C as a curing agent
-2 (same as above) 2.0 parts by weight and KE ColorBL as a colorant (same as above) 1.2 parts by weight were sufficiently kneaded with a two-roll mill and a single screw extruder was used to obtain a thickness of 5 mm and a width (L ₁ ) Extrude a 24mm strip-shaped member from the die and immediately after that, 5m high on the bottom.
After mounting a triangular rod-shaped body having a length of m and a length (L ₂ ) of 16 mm at a pitch of 15 mm, it was vulcanized and the front shape shown in FIG.
A joint gasket made of a silicone-based material having a lateral shape shown in (a) was produced. On the other hand, for wood base materials, width L ₃ 20m
Prepare a building material in which a composite decorative board as an interior material is nailed and fixed through a joint with m and a depth of 15 mm, first apply an acrylic silicone primer on the bottom of this joint and air dry it, then in the joint As an uncured reaction adhesive type silicone rubber material, an addition reaction type silicone having a width of 16 mm and a thickness of 5 mm was placed, and the joint gasket was inserted from above and pressed and fixed by a jig such as a roll. The joint gasket made of silicone material is adhesively fixed to the wood base material and the composite decorative board in the joint by addition reaction type silicone,
Airtightness or watertightness was secured.

[0018]

According to the joint gasket of the present invention and the joint construction method using the joint gasket, the following effects can be obtained. Formation of air discharge channel Fluidize the adhesive layer at the center of the bottom of the joint to completely remove residual air in the closed system. This prevents blistering of joint gaskets and adhesion failure due to residual air,
Spring back is prevented by forming a vacuum system. Restriction of flow direction of adhesive Multiple triangular rods are provided in the width direction of the lower surface of the strip at a predetermined pitch in the longitudinal direction. And a plurality of passages are formed between them and allow the adhesive to flow in the width direction. In particular, the adhesive is surely flowed to the lower corner of the joint to ensure watertightness and airtightness after room temperature vulcanization and curing.

Absorption of joints and dimensional fluctuations of joint gaskets Length, height, pitch of the triangular rod-shaped members of the joint gasket, inclination angle with respect to the surface of the strip-shaped member, width L _{1 of the} strip-shaped member with respect to joint width L ₃ and triangular rod-shaped The ratio of the body length L ₂ can be arbitrarily changed according to the cross-sectional shape of the joint, and the overall structure of the joint gasket is resistant to upward and downward pressing, and both sides of the belt-shaped member should be upward. This makes it possible to absorb a slight variation (including an excessive amount) in the width and depth of the joint and the adhesive coating amount. Improving the reliability of the adhesive strength of the joint gasket to the joints Since the triangular rod-shaped bodies are integrally provided in the width direction of the lower surface of the belt-like member at a constant pitch in the longitudinal direction, the adhesive is evenly wetted on the joint gasket. Since it has a good property and has a large contact area with the adhesive filled in the gap with the joint, it is firmly fixed to the joint by the anchor effect, and a highly reliable adhesive force is given. In addition to improving the productivity of joint materials, shortening the construction period, preventing pollution due to dust, etc., no joint finishing is required.
There are advantages such as not requiring skill for work.

[Brief description of the drawings]

FIG. 1 shows an example of a joint gasket of the present invention,
Figure (a) is a front view, and Figure (b) is a side view.

2A to 2D are side views showing different aspects of the joint gasket of the present invention.

3A and 3B are all related to the joint gasket of the present invention, and FIG. 3A is a cross-sectional view showing the relationship among the width L ₁ of the strip member, the length L ₂ of the triangular rod body, and the joint width L _{3 in} the joint gasket. An explanatory view and Drawing (b) are sectional explanatory views showing a use state of a joint gasket.

4 (a) to 4 (h) are vertical cross-sectional views showing, in the order of steps, states when performing a joint construction method using the joint gasket shown in FIG.

5 (a) and 5 (b) are cross-sectional explanatory views showing different aspects of a conventional joint gasket.

[Explanation of symbols]

1, 15 ... Strip-shaped member, 2, 20 ... Triangular rod-shaped member, 3 ... Bottom of joint, 4 ... Passage, 5, 11 ... Joint, 12 ... Primer, 13 ... Adhesive, 14 ...
Joint gasket, 16 ... lower corner,
17 ... Interior / exterior material, 18 ... Base material,
19… Overhanging part.

Claims (2)

[Claims] 1. A joint gasket, characterized in that a plurality of triangular rod-shaped bodies having a shorter length than the strip-shaped member are provided in the width direction of the lower surface of the strip-shaped member at a predetermined pitch in the longitudinal direction. 2. A joint construction method characterized in that the joint is pretreated with a primer, an adhesive is placed thereon, and then the joint gasket according to claim 1 is inserted and fixed.