JP2010084366A - Watertight structure of fitting connection part of metal siding material - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a watertight structure of a fitting connection part of a metal siding material, easily providing the fitting connection part of the metal siding material with a packing by hot melt coating, securing watertightness by flexibility and work efficiency in fitting connection and providing stripping property to simplify repair during construction. <P>SOLUTION: The watertight structure 20 of the fitting connection part of the metal siding material 10 including a projecting connection part 12 at one end and a recessed connection part 13 at the other end so to be fittingly connectable to each other, is provided with the packing 21 formed of elastomer that can be hot melt coated, in the recessed connection part 13 into which the projecting connection part 12 is fittingly connected. A stripping property improving agent for imparting stripping property allowing the fitting connection part to be refitted is added to the elastomer, and flexibility is imparted to the elastomer to set 50% compressive stress at 0°C of the packing 21 to which the stripping property improving agent is added, to 1.5 kg/cm2 or less. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a watertight structure of a fitting connection portion of a metal siding material, and enables hot melt coating of a packing of a fitting connection portion of a metal siding material used as an outer wall material in a house, a store, a warehouse, etc. In addition to ensuring the properties, it is easy to rework during construction by providing releasability.

The metal siding material, for example, a metal steel plate having a thickness of about 0.1 to 0.5 mm typified by a galvalume steel plate is used as a surface material, and a convex connection portion is formed at one end by cold forming and a concave connection is formed at the other end. After forming the middle part into a bowl-shaped part and injecting foamable liquid hard urethane material into it, foaming is performed using the cold-formed back steel plate as the back material It is a panel having a structure in which a hard urethane foam having a product thickness of 10 to 50 mm manufactured by bonding at the same time is coated with steel plates on both sides with a core material.
This metal siding material is used, for example, to construct an outer wall by fitting a convex connection part and a concave connection part between adjacent panels on a pier provided in a building frame. Taking advantage of features such as shortening the construction period by dry construction, it is becoming popular as an exterior wall material for commercial facilities such as houses, stores, and warehouses.

In such a metal siding material, in addition to ensuring watertightness due to the shape of the concavo-convex connection part to be fitted and connected, as a countermeasure against water leakage from the fitting connection part in the event of a typhoon or heavy rain, the foamed synthetic is used in the fitting connection part Many are provided with resin packing.
This foamed synthetic resin packing is considered to be rich in flexibility in consideration of water-tightness and fitting workability at the time of construction. For example, as disclosed in Patent Document 1, the foamed synthetic resin packing has a string shape.

Then, the attachment to the metal siding material is performed by pushing the foamed synthetic resin packing while applying tension to the concave connecting portion conveyed through the production line during the production process of the metal siding material.
Japanese Patent Publication No. 7-9112

After the string-like foamed synthetic resin packing is pushed in by applying tension to the concave connection part of the metal siding material, and cut with the metal siding material, the foamed synthetic resin packing stretched by the tension shrinks due to the release of internal strain, There is a problem that defects occur at both ends.
Therefore, it is possible to increase the string diameter of the foamed synthetic resin packing, or to fix the foamed synthetic resin packing with an adhesive or an adhesive, but this is not preferable because it increases man-hours and costs.
In addition, it is conceivable to use hot melt that can be directly applied to the concave connecting portion without forming a string, but it is possible to obtain a softness such as foamed synthetic resin packing. The strength becomes strong, and once it is fitted and connected at the time of construction, if you try to remove the connection for adjustment such as position adjustment, you can not easily remove it with strong adhesive force, but if you try to remove it with great force, There is a problem that the hot melt peels off from the concave connection part and comes off together with the convex connection part, so that the position adjustment cannot be corrected.

  The present invention has been made in view of the problems and current state of the prior art. Packing can be easily provided by hot-melt coating on the fitting connection portion of the metal siding material, and watertightness and fitting due to flexibility can be achieved. An object of the present invention is to provide a watertight structure of a fitting and connecting portion of a metal siding material that can ensure the workability of joint connection and can be easily reworked by providing releasability.

  The watertight structure of the fitting connecting portion of the metal siding material according to claim 1 of the present invention that solves the problems of the prior art is provided with a convex connecting portion at one end and a concave connecting portion at the other end, and is fitted to each other. It is a watertight structure of the fitting connection part of the metal siding material configured to be jointly connectable, and provided with a packing made of an elastomer that can be hot-melt coated on the concave connection part to which the convex connection part is fitted and connected, The elastomer is added with a peelability improver that gives releasability that allows the fitting connection part to be refitted, and 50% compressive stress at 0 ° C. of the packing to which the peelability improver is added. Is characterized by being provided with a flexibility of 1.5 kg / cm 2 or less.

In addition, the watertight structure of the fitting connecting portion of the metal siding material according to claim 2 of the present invention is the structure according to claim 1, wherein the peelability improver is selected from the following A, B, C, and D: One or two or more of them are mixed and added to form the packing.
A: Fluorine, silicone release agent B: Higher fatty acid, metal salt of higher fatty acid, higher fatty acid ester, various waxes C: Inorganic filler, metal powder D: Various slidability imparting agents, silicone resin powder, fluorine resin powder , Silicone acrylic copolymer resin powder, NOFALOY

  Furthermore, the watertight structure of the fitting connecting portion of the metal siding material according to claim 3 of the present invention is the same as that of claim 2, wherein the peelability improver is selected from the A: fluorine and silicone release agents. The packing is constituted by adding 0.05 to 3 parts by weight with respect to 100 parts by weight of the elastomer.

  According to a fourth aspect of the present invention, in addition to the constitution of the second aspect, the watertight structure of the fitting connecting portion of the metal siding material includes the B: higher fatty acid, a metal salt of higher fatty acid. In addition, the packing is configured by adding 0.3 to 5 parts by weight with respect to 100 parts by weight of the elastomer as well as one kind of higher fatty acid ester and various waxes.

  Furthermore, the watertight structure of the fitting connecting portion of the metal siding material according to claim 5 of the present invention is the structure according to claim 2, wherein the peelability improver is selected from the above D: various slidability imparting agents, silicone The packing is configured by adding 2 to 40 parts by weight to 100 parts by weight of the elastomer while using one kind of resin powder, fluororesin powder, silicone acrylic copolymer resin powder, and no alloy. .

  According to the watertight structure of the fitting connecting portion of the metal siding material according to the first aspect of the present invention, the metal configured to have a convex connecting portion at one end and a concave connecting portion at the other end so that they can be connected to each other. A watertight structure of the fitting connecting portion of the siding material, wherein the concave connecting portion to which the convex connecting portion is fitted and connected is provided with a packing made of an elastomer capable of hot melt coating, and the elastomer is provided with the fitting. While adding a peelability improver that gives releasability to re-fit the joint part, the 50% compression stress at 0 ° C. of the packing to which this peelability improver is added is 1.5 kg / cm 2 or less. Therefore, by using a packing made of an elastomer that can be hot-melt coated, it can be provided in the concave connection portion without causing defects or increasing man-hours. Moreover, by providing the peelability by adding the peelability improver, the metal siding material can be easily repaired such as removal after being fitted and connected. Further, by setting the 50% compressive stress at 0 ° C. of the packing to 1.5 kg / cm 2 or less, flexibility can be imparted and workability and watertightness of the fitting connection can be ensured.

Moreover, according to the watertight structure of the fitting connection part of the metal siding material according to claim 2 of the present invention, the peelability improver is selected from one or more of A, B, C and D below. Since the packing is configured by mixing and adding, the releasability is imparted by adding these releasability improvers, and it is possible to easily carry out reworking such as removal after fitting and connecting.
A: Fluorine, silicone release agent B: Higher fatty acid, metal salt of higher fatty acid, higher fatty acid ester, various waxes C: Inorganic filler, metal powder D: Various slidability imparting agents, silicone resin powder, fluorine resin powder , Silicone acrylic copolymer resin powder, NOFALOY

  Furthermore, according to the watertight structure of the fitting connection portion of the metal siding material according to claim 3 of the present invention, the peelability improver is one of the A: fluorine and silicone release agents, and the Since the packing is formed by adding 0.05 to 3 parts by weight with respect to 100 parts by weight of the elastomer, it is easy to modify the removal after the adhesive strength is once fitted and connected with this peelability improver and its added amount. At the same time, the flexibility of the packing necessary for workability and watertightness of the fitting connection can be ensured.

  Moreover, according to the watertight structure of the fitting connection part of the metal siding material according to claim 4 of the present invention, the release improver is selected from B: higher fatty acid, metal salt of higher fatty acid, higher fatty acid ester, various waxes. Since the packing was formed by adding 0.3 to 5 parts by weight with respect to 100 parts by weight of the elastomer, the adhesive force was once fitted and connected with this peelability improver and its added amount. At the same time, it is possible to easily perform subsequent repairs such as removal, and at the same time, it is possible to ensure the flexibility of the packing necessary for workability and watertightness of the fitting connection.

  Furthermore, according to the watertight structure of the fitting connection part of the metal siding material according to claim 5 of the present invention, the peelability improver is selected from D: various slidability imparting agents, silicone resin powder, fluororesin powder, Since the silicone acrylic copolymer resin powder and one kind of no alloy are used and the packing is formed by adding 2 to 40 parts by weight with respect to 100 parts by weight of the elastomer, the peelability improver and the addition amount thereof can be used as an adhesive strength. In addition, it is possible to easily perform the repair such as removal after the fitting connection once, and at the same time, the flexibility of the packing necessary for the workability and watertightness of the fitting connection can be ensured.

Hereinafter, the best mode for carrying out the present invention will be described in detail with reference to the drawings.
1 and 2 relate to an embodiment of a watertight structure of a fitting connecting portion of a metal siding material according to the present invention. FIG. 1 is a front view of a metal siding material, an enlarged view of a convex connecting portion, and a concave connecting portion. FIG. 2 is an enlarged view and FIG. 2 is a partial cross-sectional view in a coated state and a partial cross-sectional view in a fitted and connected state of the packing with the front and back reversed.

  The metal siding material 10 to which the watertight structure 20 of the fitting connecting portion of the metal siding material is applied, for example, as shown in the state of use as an outer wall in FIG. A metal plate having a thickness of ˜0.5 mm is used as the surface material 11, and the convex connecting part 12 is formed at one end (right end in the figure) by cold forming and the concave connecting part 13 is formed at the other end (left end in the figure). Then, the hook-shaped part 14 is formed with the design in the middle, and a foamable liquid hard urethane material that becomes the core material 15 is injected into the inverted hook-shaped part 14. Thereafter, the cold-formed back steel plate is used as the back material 16 and the shape of the foaming core material 15 is maintained, and a presser material 17 such as paper for suppressing heat conduction is bonded together with foaming. Article thickness is insulation panel of a composite structure of both sides steel plate in which the rigid polyurethane foam of 10~50mm adiabatic core. The metal siding material can be used as an exterior material, as well as an interior material for a barn or a warehouse, and the wall surface can be washed with water or chemicals.

  The convex connecting part 12 constituting the fitting connecting part of the metal siding material 10 is a curved part with a sharp tip and a substantially V-shaped cross section, and the concave part 13a of the concave connecting part 13 is The parallel part and the circular part have a substantially keyhole shape whose inside is expanded from the inlet side, and the convex part 12a is inserted into the concave part 13a and is connected by fitting, whereby the vertical surface on the upper side of the convex part 12a is nearly vertical. And a vertical surface near the vertical side on the inlet side of the recess 13a are in close contact with each other. In addition, the metal surface material 11 and the back surface material 16 are molded so as not to be in direct contact with each other by fitting connection, so that direct heat conduction does not occur and heat insulation is not deteriorated by heat bridge. It is.

  The watertight structure 20 of the fitting connecting portion of the metal siding material according to the present invention has a more complete watertight state in addition to bringing the convex connecting portion 12 and the concave connecting portion 13 of the metal siding material 10 into close contact with each other. In addition, the metal siding material 10 can be removed and refit for repositioning even if the metal siding members 10 are once fitted and connected, and the packing 21 is inserted into the concave portion 13a of the concave connecting portion 13. Is provided.

The packing 21 used for the watertight structure 20 of the fitting connecting portion of the metal siding material is made of an elastomer that can be hot-melt coated, and the peelability improver that gives the elastomer a releasability that allows refitment. Is added, and the softness which makes the 50% compression stress at 0 ° C. of the packing 21 to which the peelability improver is added not more than 1.5 kg / cm 2 is provided.
Here, the releasability that enables re-fitting refers to 1-2 when the convex part 12a of the metal siding material 10 in a state of fitting and connecting for reworking is pulled from the concave part 13a provided with the packing 21. This means that it is possible to remove the packing 21 without adhering to the convex portion 12a without requiring so much labor in the nominal work.
Further, when the 50% compressive stress at 0 ° C. of the packing 21 exceeds 1.5 kg / cm 2, the packing 21 becomes hard particularly during construction in the winter, and when the concave portion 13a and the convex portion 12a are fitted and connected. A considerable amount of labor is required to push the convex portion 12a, and the workability is remarkably deteriorated.

  According to such a packing 21, an elastomer capable of hot melt coating is used, so that a non-coated defect portion does not occur in the recess 13 a to be coated, and in addition, the metal siding material 10 is coated during the manufacturing process. By carrying out the process, it is not necessary to make the coating a separate process, and the concave connection part 13 can be provided without increasing the number of processes. Further, by providing the releasability by adding a releasability improver, it is possible to easily perform a repair such as removal after the metal siding material 10 is once fitted and connected. Further, by setting the 50% compressive stress at 0 ° C. of the packing 21 to 1.5 kg / cm 2 or less, it is possible to provide flexibility and secure workability and watertightness of fitting connection.

  Examples of the hot melt coatable elastomer used as the packing 21 include thermoplastic elastomers and reactive elastomers, and if the 50% compression stress at 0 ° C. of the elastomer itself is 1.5 kg / cm 2 or less, What is normally used can be used.

  Examples of thermoplastic elastomers include natural rubber, nitrile rubber (NBR), hydrogenated nitrile rubber (HNBR), vinylidene fluoride rubber (FKM), tetrafluoroethylene-propylene rubber, and tetrafluoroethylene perfluorovinyl ether. Fluorine rubber such as rubber (FFKM), Silicone rubber such as vinyl methyl silicone rubber (VMQ) and fluorinated silicone rubber (FVMQ), Acrylic rubber (ACM), Polyester polyol urethane rubber (AU) and Polyether polyol urethane Urethane rubber such as rubber, ethylene propylene rubber such as EPM and EPDM, chloroprene rubber (CR), chlorosulfonated polyethylene (CSM), epichlorohydrin rubber, isoprene rubber (IR), styrene butadiene rubber (SBR), styrene isoprene rubber (SIR) ), Butaji Synthetic rubber such as rubber (BR), polysulfide rubber (T), norbornene rubber (NOR), vinyl chloride resin, acrylic resin, polyamide resin, polyurethane resin, polyester resin, polypropylene resin, polyethylene resin, ethylene vinyl acetate copolymer resin , ABS resin, MBS resin, propylene-ethylene-butene-1 random copolymer resin, styrene-butadiene-styrene block copolymer resin (SBS), elastomers such as styrene-isoprene-styrene block copolymer resin (SIS), etc. The copolymer resin of these can be mentioned.

  As the reactive elastomer, silicone resin and urethane resin are suitable. Examples of the urethane resin include urethane prepolymers having an isocyanate group terminal having a main skeleton of a polyol such as polyester, polycarbonate, polyether or caprolactone. be able to.

  These thermoplastic elastomers and reactive elastomers may be used alone or in combination of two or more.

  The releasability improver that is blended in the elastomer and gives the peelability to the convex part is interposed between the elastomer and the convex part, such as commonly used release agents, antiblocking agents, and slidability imparting agents. To prevent sticking, to bleed or bloom on the surface of the elastomer to prevent sticking to the convex part, to form fine irregularities on the surface of the elastomer to weaken the adhesive force to the convex part, or to Any material can be used as long as it has a function of causing delamination and facilitating peeling.

  For example, as a releasability improver having a function of preventing adhesion by interposing between an elastomer and a convex part, or preventing adhesion with a convex part by bleeding or blooming on the surface of the elastomer. Is a silicone resin such as tetrafluoroethylene (PTFE), perfluoroalkyl group-containing oligomers and polymers, and a fluororesin mold release agent, dimethylpolysiloxane, alkyl-modified silicone, fatty acid-modified silicone, and amino acid-modified silicone. Silicone oils such as various silicone resins and various silicone rubbers, silicone resin mold release agents, higher fatty acids such as stearic acid and palmitic acid, higher fatty acid metal salts such as calcium stearate and zinc stearate, higher fatty acid esters, carnauba wax, Natural wax such as rice wax, para Examples include fin wax, microcrystalline wax, isoparaffin wax, oxidized petrolatum, oxidized petrolatum metal salt, oxidized wax ester, urethane type wax and other petroleum wax, polyethylene wax, caster wax, liquid paraffin, chlorinated paraffin, acrylic wax polymer, etc. be able to.

  In addition, as an exfoliation improver having the function of forming fine irregularities on the surface of the elastomer and weakening the adhesive strength with the convex parts, inorganic filler powders such as fine powder silica, calcium carbonate, talc, aluminum hydroxide, aluminum oxide, etc. And metal powders such as aluminum and iron.

  Furthermore, as a peelability improving agent having a function of causing delamination of the elastomer and facilitating the peeling, a general slidability imparting agent such as molybdenum disulfide, graphite powder, butadiene rubber or acrylic rubber is used. Examples thereof include Methbrene C, E, W, S (manufactured by Mitsubishi Rayon Co., Ltd.) and the like in which a graphite layer is provided on the outer shell of the particulate rubber of silicone acrylic copolymer rubber.

In addition, as a peelability improver that prevents adhesion by the combined action of the above functions, silicone resin powder, fluororesin (PTFE, etc.) powder, silicone acrylic copolymer resin powder (Charine R manufactured by Nissin Chemical Industry Co., Ltd.) -170, R-170S), NOFALLOY KA-632, KA-832 (manufactured by NOF Corporation), and the like.
These peelability improvers can be used alone or in admixture of two or more.

  The blending amount of these various peelability improvers into the elastomer is such that the adhesion with the convex portion 12a of the adjacent metal siding material 10 is substantially not felt immediately after fitting, and the packing 21 can be removed without adhering. What is necessary is just to add, and the range of a required compounding quantity changes with each peelability improvement material.

That is, about A: fluorine or silicone-based mold release agent, it is preferable to blend approximately 0.1 to 3 parts by weight with respect to 100 parts by weight of the elastomer,
B: About higher fatty acids and higher fatty acid metal salts, higher fatty acid esters, various waxes and the like, it is preferable to blend approximately 0.3 to 5 parts by weight with respect to 100 parts by weight of the elastomer,
C: About inorganic filler, metal powder, etc., it is preferable to mix approximately 3 to 20 parts by weight with respect to 100 parts by weight of elastomer,
D: About 3 to 30 parts by weight of various slidability imparting agents, silicone resin powder, fluororesin powder, silicone acrylic copolymer resin powder, and no-falloy are preferably added to 100 parts by weight of the elastomer.
If the blending amount is less than the lower limit value, the required peelability is insufficient. On the other hand, when exceeding each upper limit value, not only will the cost increase significantly, but the bleed and bloom may become severe and the coating film of the surface material 11 of the metal siding material 10 may swell or peel off, There is a possibility that the melt viscosity of the hot melt increases and the discharge amount from the nozzle decreases or the coating work is hindered. Further, the elastomer becomes hard and the fitting of the convex portion 12a is hindered. When the upper limit value is exceeded in this way, a problem occurs in the manufacture of the packing and the packing itself, and a problem occurs in the construction (fitting connection) of the metal siding material.

  Further, each thermoplastic elastomer and reactive elastomer used in the packing 21 may be dioctyl phthalate, ethylene glycol dibenzoate, butyl phthalyl butyl glycolate, butyl benzyl phthalate, cleoline phosphate as required. Plasticizers such as dilphenyl, toluenesulfonamide, N-ethyltoluenesulfonamide, hydrogenated terphenyl, heat stabilizer, anti-aging agent, light stabilizer, reaction accelerator, process oil, filler, surfactant, various One type or a plurality of types such as a synthetic resin can be appropriately added to improve the respective characteristics.

In the watertight structure 20 of the fitting connecting portion of the metal siding material using such a packing 21, a block-like (solid) elastomer composition based on a predetermined blending according to the kind of the elastomer in advance. A product (packing composition) is prepared.
In the manufacturing process of the metal siding material 10, the hot melt state packing 21 is applied in the recessed portion 13 a of the inverted connection portion 13 of the metal siding material 10 being conveyed.

  That is, the block-shaped elastomer composition is put into a melter of a hot melt melt coating equipment, heated to about 150 to 300 ° C. to melt, and the packing 21 in a melted state is fed by an automatic gun or coating through a hose with a constant supply pump. As shown in FIG. 2A, for example, the cross-sectional shape is approximately circular or elliptical from the coating nozzle 22 onto the lower inner surface of the inverted recess 13a of the metal siding material 10. Apply continuously so that When the metal siding material 10 is cut, the packing 21 is also cut, and the packing 21 is provided in the recess 13a of each metal siding material 10, and the packing 21 is cooled or required flexibility by reaction in the reactive elastomer. And having releasability.

The metal siding material 10 in which the packing 21 is provided in the concave portion 13a of the concave connection portion 13 is transported to the construction site, and the convex connection portion 12 of the metal siding material 10 fixed on the pier provided in the building body. The concave portion 13a of the concave connecting portion 13 of the next metal siding material 10 is inserted into the convex portion 12a to be fitted and connected. In this fitted and connected state, as shown in FIG. 2B, the packing 21 is in close contact between the upper surface of the convex portion 13a and the upper inner surface of the concave portion 13a, and a watertight state is ensured.
In addition, when the metal siding members 10 are connected to each other, the insertion resistance is small due to the flexibility of the packing 21 and the fitting work can be facilitated. Immediately after that, if the fitting connection is to be removed for reworking such as position adjustment, the packing 21 can be removed without adhering to the convex portion 12a at all, and reworking can be easily performed.

  As described above, according to the watertight structure 20 of the fitting connecting portion of the metal siding material, the convex connecting portion 12 is provided at one end and the concave connecting portion 13 is provided at the other end so that they can be fitted and connected to each other. In the watertight structure of the fitting connection portion of the constructed metal siding material 10, a packing 21 made of an elastomer capable of hot melt coating is provided on the concave connection portion 13 to which the convex connection portion 12 is fitted and connected. While adding a peelability improver that provides releasability to enable re-fitting of the fitting connection portion, the 50% compression stress at 0 ° C. of the packing 21 to which this peelability improver is added is 1.5 kg / cm 2. Since it is configured with the following flexibility, it is provided in the concave connecting portion 13 without causing a defect or an increase in the number of man-hours by using the packing 21 made of an elastomer capable of hot melt coating. Can. Further, by providing the releasability by adding a releasability improver, it is possible to easily perform a repair such as removal after the metal siding material 10 is once fitted and connected. Further, by setting the 50% compressive stress at 0 ° C. of the packing 21 to 1.5 kg / cm 2 or less, it is possible to provide flexibility and secure workability and watertightness of fitting connection.

In the above embodiment, when the packing 21 is applied, it is applied on the lower inner surface of the recessed portion 13a in the inverted state. However, the gap between the protruding portion 12a and the recessed portion 13a of the metal siding material 10 is applied. For example, as shown in FIG. 3 (a), the packing 21 is applied to the central inner surface of the recess 13a, and as shown in FIG. You may make it ensure a close_contact | adherence state so that the front-end | tip part of the part 12a may enter the packing 21 and be wrapped.
Even in such a close contact structure of the fitting connecting portion of the metal siding material, the same effects as those of the above-described embodiment can be obtained.

  In addition, various cross-sectional shapes such as circular, elliptical, semi-circular, and grooved portions where the convex part hits can be applied to the packing applied to the concave part, and the size is basically a metal siding material It is sufficient that the contact state can be ensured so as to contact the convex portion when the two are fitted and connected, and to prevent water from entering from the outside.

Examples of the present invention will be described below together with comparative examples, but the present invention is not limited to these examples.
In the examples, a synthetic rubber elastomer (A) having a 50% compressive stress at 0 ° C. of 0.25 kg / cm 2 was used as the elastomer constituting the packing.
In the comparative example, a synthetic rubber elastomer (B) having a 50% compression stress at 0 ° C. of 2.10 kg / cm 2 was used as the elastomer constituting the packing.
A variety of peelability improvers were added to the elastomer (A) to change the blending amount to obtain a packing composition.
Each packing composition is melted by a melter set at 220 ° C. in a hot melt coating facility, and the diameter of the circular cross section of the packing is about 5 mm from the coating nozzle, so that the concave portion of the metal siding material shown in FIG. Was applied to form a packing.
In order to evaluate this packing, the 50% compressive stress at 0 ° C. of the packing alone was measured.
In addition, the metal siding material having a fitting part length of 45 cm is fitted and connected, and the fitting property is evaluated from the fitting resistance at the time of fitting and connecting. Evaluation was made based on the resistance when the metal siding material was pulled and removed and the presence or absence of packing.
Furthermore, comprehensive evaluation was performed based on the compressive stress value, fitting property, and reworkability.
All of these evaluations are described in Table 1 with ○ indicating that there is no problem, ○ △ indicating that there is no problem, and × indicating that there is a significant problem.

(Example 1) to (Example 4)
Fatty acid-modified silicone oil (TSF-410: manufactured by GE Toshiba Silicone Co., Ltd.) was used as a peelability improver, and the blending amount was 0.05 parts by weight per 100 parts by weight of the synthetic rubber elastomer (A) (implemented) Example 1), 1.00 parts by weight (Example 2), 2.00 parts by weight (Example 3), and 3.00 parts by weight (Example 4) were used as packing compositions.
As a result of measuring 50% compressive stress at 0 ° C. of these packing compositions, all were 0.25 kg / cm 2.
When the fitting performance, reworkability, and comprehensive evaluation with the metal siding material using these packings were performed, in Example 1, the convex portion was easily fitted into the concave portion with almost no resistance during fitting connection. Although it was possible (○), it was assumed that reworking work at the time of on-site construction, and once the fitted convex part was pulled, there was a problem with the reworking work at the time of on-site construction. Therefore, the comprehensive evaluation was determined to be a range with no problem (◯ △) (see Table 1).
Moreover, about Example 2-Example 4, all can fit a convex part to a recessed part easily with little resistance at the time of a fitting connection ((circle)), and the reworking work at the time of field construction is assumed, Once the convex part that has been fitted is pulled, it can be removed with almost no resistance, and there is no problem in reworking work at the time of construction in the field (○). (See Table 1).

(Example 5) to (Example 8)
Paraffin wax (FNP-115: manufactured by Nippon Seiki Co., Ltd.) was used as a peelability improver, and the blending amount was 0.20 parts by weight (Example 5) with respect to 100 parts by weight of the synthetic rubber elastomer (A). ), 1.00 parts by weight (Example 6), 3.00 parts by weight (Example 7), and 5.00 parts by weight (Example 8).
As a result of measuring 50% compressive stress at 0 ° C. of these packing compositions, all were 0.25 kg / cm 2.
When the fitting property with the metal siding material using these packings, the reworkability, and the comprehensive evaluation were performed, in Example 5, the convex portion was easily fitted into the concave portion with almost no resistance during fitting connection. (○) was able to rework at the time of on-site construction, but once the fitted convex part was pulled, there was a problem with the rework at the on-site construction. Therefore, the comprehensive evaluation was determined to be a range with no problem (◯ △) (see Table 1).
Moreover, about Example 6-Example 8, all can fit a convex part to a recessed part easily with little resistance at the time of fitting connection ((circle)), and the reworking work at the time of construction on site is assumed, Once the convex part that has been fitted is pulled, it can be removed with almost no resistance, and there is no problem in reworking workability during construction (○). (See Table 1).

(Example 9) to (Example 13)
Silicone acrylic copolymer resin powder (Sharine R-170S: manufactured by Nissin Chemical Industry Co., Ltd.) having an average particle size of 30 μm is used as a peelability improver, and the amount of the compound is based on 100 parts by weight of the synthetic rubber elastomer (A). 2.00 parts by weight (Example 9), 5.00 parts by weight (Example 10), 20.00 parts by weight (Example 11), 30.00 parts by weight (Example 12), 40.00 parts respectively. The packing composition was used as parts by weight (Example 13).
As a result of measuring 50% compression stress at 0 ° C. of these packing compositions, it was 0.25 kg / cm 2 in Example 9.
When the fitting performance, reworkability, and comprehensive evaluation with the metal siding material using these packings were performed, in Example 9, the convex portion was easily fitted into the concave portion with almost no resistance during fitting connection. Although it was possible (○), it was assumed that reworking work at the time of on-site construction, and once the fitted convex part was pulled, there was a problem with the reworking work at the time of on-site construction. Therefore, the comprehensive evaluation was determined to be a range with no problem (◯ △) (see Table 1).
Moreover, about Example 10-Example 12, as a result of measuring 50% compressive stress in 0 degreeC of a packing composition, in Example 10, 0.30 kg / cm <2>, in Example 11, 0.60 kg / cm <2>, In Example 12, the value was different from 1.20 kg / cm 2, but in both cases, it was possible to easily fit the convex part into the concave part with little resistance at the time of fitting connection (○), and at the time of construction on site Assuming reworking work, once the fitted convex part is pulled, it can be removed with almost no resistance, and there is no problem with reworking work at the time of on-site construction (○). It was determined that there was no (○) (see Table 1).
In Example 13, the result of measuring the 50% compressive stress at 0 ° C. of the packing composition was 1.50 kg / cm 2.
When the fitting performance with metal siding material using this packing, rework workability, and comprehensive evaluation were performed, when it was tried to push in during fitting connection, although it felt somewhat resistance, it was not so much that it could not be fitted (○ △ ) However, assuming the reworking work at the time of on-site construction, once the fitted convex part is pulled, it can be removed with almost no resistance, and the reworking workability at the on-site construction has no problem (○), From these, the comprehensive evaluation was judged to be within the range where there was no problem (see Table 1).

(Comparative Example 1)
Only the same synthetic rubber-based elastomer (A) as in each example was used, and the same procedure as in each example was performed except that the peelability improver was not blended.
In Comparative Example 1, the result of measuring the 50% compressive stress at 0 ° C. of the packing composition was 0.25 kg / cm 2.
The fitting, reworking workability, and comprehensive evaluation with the metal siding material using this packing were carried out, and it was possible to easily fit the convex part into the concave part without any resistance during fitting connection (○ ) However, assuming the repair work at the time of on-site construction, when the convex part once fitted is pulled, not only the adhesive strength is strong and it can not be easily peeled off, but there is also adhesion of partially peeled packing It was recognized that it could not be re-fitted as it was, and there was a significant problem in the reworkability at the site (×). From these, it was determined that the overall evaluation had a significant problem (×) (see Table 1).

(Comparative Example 2)
The same procedure as in each Example and Comparative Example 1 was conducted, except that only the synthetic rubber elastomer (B) was used as the elastomer constituting the packing and no releasability improver was blended.
In Comparative Example 2, the result of measuring the 50% compressive stress at 0 ° C. of the packing composition was 2.10 kg / cm 2.
The fitting, reworking workability, and comprehensive evaluation with the metal siding material using this packing were conducted, and even when trying to push the convex part into the concave part at the time of fitting connection, the resistance of the packing was strong and easily determined. There was a significant problem because it could not be mated (×), but it was possible to remove it with almost no resistance when pulling the convex part once mated, assuming rework at the time of construction at the site. There was no problem with the reworkability at the time (○). The overall evaluation from these was judged to be extremely problematic (x) (see Table 1).

  From the comparative examples 1 and 2 described above, the synthetic rubber-based elastomers (A) and (B) alone have a significant problem using either (A) or (B). As described above, even when the 50% compressive stress at 0 ° C. of the packing composition is 1.50 kg / cm 2 or less, the releasability cannot be ensured and a significant problem arises in reworking workability. It has been found that blending of the peelability improver is an essential requirement.

It is the front view of the metal siding material concerning one Embodiment of the watertight structure of the fitting connection part of the metal siding material of this invention, the enlarged view of a convex connection part, and the enlarged view of a concave connection part. It is the fragmentary sectional view of the coating state of the packing which reversed the front and back concerning one Embodiment of the watertight structure of the fitting connection part of the metal siding material of this invention, and the fragmentary sectional view of a fitting connection state. It is the fragmentary sectional view of the coating state of the packing which reversed the front and back concerning other one Embodiment concerning the watertight structure of the fitting connection part of the metal siding material of this invention, and the fragmentary sectional view of a fitting connection state.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Metal siding material 11 Surface material 12 Convex connection part 12a Convex part 13 Concave connection part 13a Concave part 14 Cage-like part 15 Core material (foaming heat insulation layer)
16 Back material 17 Presser material 20 Watertight structure 21 of fitting connection part of metal siding material 21 Packing

Claims (5)

A watertight structure of a fitting connection portion of a metal siding material configured to have a convex connection portion at one end and a concave connection portion at the other end so as to be fitted and connected to each other,
In the concave connection part to which the convex connection part is fitted and connected, a packing made of an elastomer capable of hot melt coating is provided,
The elastomer is added with a peelability improver that gives releasability that allows the fitting connection part to be refitted, and 50% compressive stress at 0 ° C. of the packing to which the peelability improver is added. A watertight structure of the fitting and connecting portion of the metal siding material, wherein the metal siding material is provided with a flexibility of 1.5 kg / cm 2 or less. 2. The metal siding material according to claim 1, wherein the packing is constituted by adding one or more of the following A, B, C, and D to the peel improver. The watertight structure of the fitting connection part.
A: Fluorine, silicone release agent B: Higher fatty acid, metal salt of higher fatty acid, higher fatty acid ester, various waxes C: Inorganic filler, metal powder D: Various slidability imparting agents, silicone resin powder, fluorine resin powder , Silicone acrylic copolymer resin powder, NOFALOY   The release improver is one of A: fluorine and silicone release agent, and 0.05 to 3 parts by weight is added to 100 parts by weight of the elastomer to constitute the packing. The watertight structure of the fitting connection part of the metal siding material according to claim 2.   The peelability improver is one of B: higher fatty acid, higher fatty acid metal salt, higher fatty acid ester, and various waxes, and 0.3 to 5 parts by weight are added to 100 parts by weight of the elastomer. The watertight structure of the fitting connection part of the metal siding material according to claim 2, wherein a packing is formed.   The releasability improver is one of D: various slidability imparting agents, silicone resin powder, fluororesin powder, silicone acrylic copolymer resin powder, and no alloy, and 2 to 40 with respect to 100 parts by weight of the elastomer. The watertight structure of the fitting connecting portion of the metal siding material according to claim 2, wherein the packing is configured by adding a weight portion.

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