JPH05125823A - Gap filling processing method for hot melt joint material - Google Patents

Abstract

PURPOSE:To improve a depth filling property, smoothness of a joint finished surface and others by filling gaps of a hot joint material for tile panels including a specified amount of thermal plastic compounds and filler and by giving specified oscillation at the time of filling or after filling. CONSTITUTION:To fill gaps of a joint of a tile panel for a unit bath, a thermal plastic component mixed with a thermal plastic base resin 10-50weight % and wachs 90-50weight % is used. Thereafter, an inorganic or organic filling pigment 0.1-90% is mixed with the thermal plastic component 99.9-10weight%. Thereafter, this mixture is filled in the depth between the gaps uniformly in the melted state as a joint material by using various kinds of hot melt applicators or manual hand guns. In this case, a joint of surface smoothness is formed by giving mechanical amplitude oscillation in a range of 5-1000Hz by a vibrator or others at the time of filling or after completion of filling. Consequently, it is possible to carry out construction with a mildewproof joint material in a short period of time and to improve smoothness of a finished outer appearance.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a gap filling processing method such as tile joint formation using a hot melt joint material.

[0002]

2. Description of the Related Art In the field of building materials panels, tiles made of decorative ceramics have been pasted on panels typified by slate boards and concrete panel boards to produce interior decorative panels for bathrooms and the like. There is. As a joint material for ceramic tiles, a cement joint material has been best known so far, and the construction method is generally a manual construction method.

[0003]

Particularly, in the above cement joint filling method, there is a problem of working life, a problem that complete curing is slow and long-term aging is required, and a high degree of skill is required in construction. However, there was a problem in productivity due to problems such as securing skilled human resources. Also, in cement joints,
There is a problem that mold is remarkably generated under high temperature and high humidity after the construction, and mold once generated cannot be removed easily. Therefore, a joint material that does not generate mold and its construction method have been strongly demanded in recent years. On the other hand, as resin joint materials, resin joint materials such as moisture-curable silicone caulking material, moisture-curable urethane caulking material, solvent-type butyl rubber caulking material, and emulsion-type acrylic caulking material are known. Is a soft joint material and is relatively expensive, and it takes a long time to cure or dry, so that it is mainly hand-made like cement joint materials, and productivity and mold resistance are major problems. In recent years, hot-melt joint materials have come to be considered as joint materials with excellent antifungal properties, which are represented by ceramic tile panels for building materials, and gap filling seals between inorganic building material panels. The main issue is to find a method for filling and processing hot-melt joint material that has an excellent appearance. As a basic property of hot melt joint materials, it is an essential requirement that they are hard for the purpose of preventing scratches. Therefore, generally, fast-drying (fast-solidifying) joint materials are mainly developed and studied. ing. Therefore, it can be said that when the gap is filled, it has a property of being immediately cooled and solidified, and it has a defect that the filling is difficult to form uniformly and a property of lacking surface smoothness, and it is appropriate to solve such a problem. It is an essential requirement in the industry. Specifically, when filling gaps in a hot melt joint material in a molten state, the filling is completed simply and in a short time, and at the same time, the appearance after construction is rich in smoothness and forms a finished surface excellent in aesthetic sense. This is a proposal for a construction and processing method for joint materials.

[0004]

As a result of earnest research, the present inventors have found the following specific filling processing method as means for solving the above-mentioned problems, and achieved the present invention. That is, the present invention is characterized in that, at the time of gap filling using a hot melt joint material, vibration is applied at the time of filling and / or after completion of filling to improve deep filling property and smoothness of finished joint surface. This is a gap filling method for hot melt joint materials. Preferably, the gap filling processing method for the hot melt joint material is characterized by applying mechanical amplitude vibration in the range of 5 to 1000 Hertz. More preferably, it is a method for filling a gap in a hot melt joint material, which is characterized in that the tile panel for a unit bath is used for joint filling.

The present invention will be described in detail below. The hot-melt joint material according to the present invention is a joint material containing a thermoplastic component and a filler, and there is no particular limitation, and a known material may be used. Generally, for example, a total of 9 thermoplastic compositions comprising (A) 10 to 50% by weight of the thermoplastic base resin and (B) 90 to 50% by weight of the wax.
A typical example is a hot-melt joint material composed of 9.9 to 10% by weight and (C) 0.1 to 90% by weight of the inorganic and / or organic filler. Particularly preferably, the wax (B) has a crystallinity of at least 20.
% Or more, the softening point temperature or melting point is 65 ° C. or higher,
Natural carnauba wax, natural wax such as montan wax, petroleum wax such as paraffin wax, microcristine wax, polyethylene wax, polypropylene wax, amide wax derived from higher fatty acid, ester wax derived from higher fatty acid, and higher fatty acid A hot melt joint material using one or more kinds of synthetic waxes such as derived amide ester wax and polyester oligo wax is a good example from the viewpoint of workability. The gap filling processing method of the present invention is the following processing method. That is, for example, when filling the gap forming joint after the tile or the like is attached to the panel using the above-mentioned hot melt joint material, at the time of the filling operation, specifically, simultaneously with the filling and / or the completion of the filling. Later, it is a method of filling joints by applying vibration having a specific amplitude to the adherend. In addition, in the filling processing method of the present invention, a method of preheating an adherend in advance to 100 ° C. or less, which is higher than the softening point temperature of the hot melt joint agent, is also included in the present invention. .. Also, for example, after filling and solidifying the gap of the adherend with a hot melt applicator gun, the whole is reheated to near the softening point temperature of the hot melt joint material again, and the gap filling of the hot melt joint material to repair the coating joint appearance is filled. Processing methods are also included in the present invention.
As mentioned above, the hot melt joint material is an essential requirement in the industry that it is hard from the purpose of scratch resistance prevention as its basic property, and contains a large amount of hard wax to satisfy the property. The composition is preferable, and in that sense, the hot-melt joint material can be generally referred to as a quick-drying (quick-solidifying) joint material. Therefore, when the gap is filled, it has a property of being rapidly cooled and solidified by thermal diffusion, and there are important problems such as difficulty in forming the filling uniformly and lack of surface smoothness. Solving such problems has been strongly raised as an essential requirement in this industry. Particularly, in the gap filling process in which the hot melt joint material is used for joint filling of a tile panel for a unit bath, the finished appearance is extremely important in terms of quality. The reason for applying the vibration described in the filling processing method of the present invention is that the hot-melt joint material having fast-drying property in a short time, the problem of uniformly filling the deep portion of the gap portion and the melt solidify. This is because it is indispensable for solving problems such as sufficiently exhibiting the smoothness of the joint forming surface. In addition, for the reason described below, giving a vibration is an essential factor in the method of the present invention. That is, in the hot-melt joint material according to the present invention, as described above, the (C) inorganic and / or organic filling material described below is added to the joint crack resistance, cost reduction, hue adjustment, etc. For the purpose of, it is generally included as an essential component.

Examples of inorganic fillers include titanium white, clay, talc, calcium carbonate, silica, colloidal silica, alumina, glass powder, fine sand powder, carbon black, metal powder, iron oxide, lead white and lead. Tan,
Ultramarine, navy blue, cobalt oxide, titanium black, strontium chromate, zinc chromate, iron black, molybdenum red, molybdenum white, and emerald green. The powder particle size is 100 μ or less, particularly preferably 35
Fine powder having a size of μ or less is suitable. For white joint material, it is particularly preferable to use titanium white, silica, talc, calcium carbonate, or the like. Examples of organic fillers include polymer beads such as polyacrylic acid ester and polystyrene having a particle size of 5 μm or less obtained by an emulsion polymerization method or a suspension polymerization method, an azo dye, a phthalocyanine dye,
Examples include isoindolinone dyes and aniline dyes. Particularly preferred examples are polymer crosslinked beads. Therefore, in the use case of the hot-melt joint material containing a large amount of the (C) inorganic and / or organic filler pigments, mainly for the purpose of cost reduction and crack resistance improvement, the heat-melt flow characteristics are generally considerably thixotropic. Shows the property. This flow characteristic factor is deviated as a factor that controls the filling property and the surface smoothness, and the hot melt joint material showing high thixotropy is rich in crack resistance, but there is a problem that the behavior showing a significant lack of smoothness. there were. The filling processing method of the present invention is characterized in that such a problem can be solved by using a processing method in which vibration energy is applied. In the present invention, there is no particular limitation on applying vibration, but it is common to apply vibration in the up-down direction or the front-rear, left-right direction by the following method. For example, it is also possible to employ a method in which a wood chip or a plastic hammer is actuated by a machine or manpower to give the vibration, or to use the vibration by a vibrator. Although there are no particular restrictions on the vibration amplitude and its strength, it is important to select a range in which the target material product is not damaged and to give a preferable unique vibration in relation to workability. Preferably 5
5,000 Hertz range, particularly preferably 100-1,
It is preferable to select and use the natural vibration of 000 Hertz from the short time construction method. It is preferable to select and use vibration of low Hertz in the low thixotropic hot melt joint material and vibration of high Hertz in the use example of the high thixotropic hot melt joint material. The method for filling and processing the hot melt joint material of the present invention is not particularly limited, but for example, the following specific method is preferable. With the hot melt joint material in front of you, use a variety of known hot melt applicators for about 140 ~
It is customary to prepare an apparatus capable of heating and melting at a melting temperature of 220 ° C. and supplying the required amount instantaneously or quantitatively. As a known hot melt applicator, in the example classified by the discharging mechanism type, Gear pump type, kneader / ruder type, air pump type, atmospheric pressure tank type, suction type, etc. can be adopted. It is also possible to use a simple manual handgun or a vacuum type (defoaming type) applicator. In a state where the adherend is preheated to a temperature higher than the softening point temperature of the joint material in advance, it is a preferable method to adopt a specific filling construction method such as pressurizing, vacuum filling molding or coating filling the hot melt joint material. , In that case, preferably 100 to 10
A method of applying an amplitude vibration of 00 hertz under the conditions described in the present invention and filling the same is highly preferable. In the pressure or vacuum filling method, etc., it is customary to use a mold that adheres closely to the surface of the material to be filled, and there is no particular restriction on the mold, but the surface of the target material such as the tile should be scratched. It is preferable to use a mold that does not have the above, and the contact surface is preferably made of silicone rubber, urethane rubber, Teflon, polyimide, or the like. Among the molds for filling the tile panel, a silicon bat mold, which is excellent in heat resistance and releasability, is a particularly preferable example.

In the pressure filling method, although not particularly limited, the discharge pressure of the hot melt joint material is 10 kg / cm ²
It is preferably 3 kg / cm ² or less. From the relationship with the preheating temperature, it is preferable to appropriately select a discharge pressure at which filling is completed in a short time or a discharge pressure that is excellent in a finished appearance without protrusion. Further, the state of preheating the object to be filled in advance also means the case where the temperature of the mold material used together for molding is also included. The preheating temperature is preferably 100 ° C. or lower, higher than the softening point temperature of the hot melt joint material, more preferably 50 ° C. or lower, higher than the softening point temperature of the hot melt joint material, and there is no problem even at room temperature. In the method using preheating, it is preferable to appropriately select a temperature at which the molding cycle can be efficiently carried out, and it is preferable to devise a method that allows rapid cooling or slow cooling after completion of filling. Further, as a gap filling processing method of the hot melt joint material of the present invention, after filling the gap of the adherend with a hot melt applicator gun, it is reheated to near the softening point temperature of the hot melt joint material, and the coated joint surface is It is said that it can be preferably used in the construction method for repairing a part. For details, apply the hot melt joint material to the gap of the adherend with a commercially available (known) hot melt applicator, and then reheat it to near the softening point temperature of the hot melt joint material, and then apply the joint part It can be said that it can be effectively applied to a method such as repairing the smoothness of the protruding portion after removing the protruding portion. There is no particular restriction on the application of the joint material, and a method of continuously applying the automatic control by incorporating a robot is also a good example. There is no particular restriction on the hot melt applicator used, and it is preferably used as long as it has sufficient mechanical stability and can be quantitatively applied.

[0008]

EXAMPLES The present invention will now be described with reference to Examples and Comparative Examples in order to more specifically describe the present invention, but the present invention is not limited to these Examples. The parts and% described in the examples mean parts by weight and% by weight, respectively. Example 1. As an ionomer resin, 35 parts of Himilan 1702, a product of Mitsui Polychemicals, and a melting point of 82-
55 parts of decolorized natural carnauba wax at 85 ° C., softening point temperature 107 ° C., acid modified polyethylene wax with 65% crystallinity, high wax 2203 manufactured by Mitsui Petrochemical Co., Ltd.
10 parts of A, 30 parts of titanium white, and 150 parts of calcium carbonate of 200 mesh pass were melt-kneaded at a temperature of 180 ° C. to obtain a white hot melt joint material (A). The melt viscosity of the hot melt joint material (A) at 200 ° C. is 5 to 8
It was 10,000 centipoise, and the softening point temperature of this composition was 105 ° C. Further, a 1 m square tiled panel was prepared in which white ceramic tiles having a thickness of 5 mm and a width of 10 cm were bonded to a calcium silicate plate so as to have a joint width of 5 mm in width in advance. A flat plate bat type silicon mold having rich rubber elasticity was used as a mold having one inlet and one pressure reducing port, and the mold was placed on the mold so that the surface of the tile surface of the panel was in close contact with the mold. It was fixed in close contact with the mold under a pressure of ² Kg / cm ² . The vacuum degree of the joint gap was set to about 50 mmHg by a manometer vacuum gauge, and the overall molding preheating temperature was set to room temperature. The hot melt joint material (A) is melted through the hot melt melting tank from the injection port of the mold while continuing the depressurization and applying a vibration of 300 Hz to both the mold and the adherend with the vibrator. Temperature 1
Poured at 90 ° C. When the jointing material protruded from the depressurizing port, the depressurizing port was closed, and the whole mold was left for 10 minutes and then demolded. As a result, the joint gaps between the tiles are evenly filled with the hot-melt joint material, there is no significant protrusion on the surface of the tile, no cracks are observed by the naked eye, and the appearance is extremely visible. Joints rich in whiteness and surface smoothness were formed.

Example 2. As ethylene-ethyl acrylate resin, EEAA-70 manufactured by Mitsui Polychemical Co., Ltd.
1 part, 55 parts of Neowax L (polyethylene wax) having a melting point of 80 ° C., 35 parts of transparent rosin ester resin as a tackifier resin, and 10 parts of carbon black.
Part, 40 parts of talc and 100 parts of calcium carbonate of 200 mesh pass are melt-kneaded at a temperature of 180 ° C.,
A black hot melt joint material (B) was obtained. The hot-melt joint material (B) had a melt viscosity at 200 ° C. of 1.6 to 22,000 centipoise, and was a hot-melt joint material having excellent thixotropic properties. The softening point temperature of this composition is 1
It was 02 ° C. In addition, a 1 m square tiled panel was prepared by bonding a black ceramic tile having a thickness of 5 mm and a width of 10 cm to a slate plate so as to have a joint width of 5 mm in advance. The joint material B was melted and discharged by a Numelter 60 type hand gun, and the tile panel was gap-filled while preheated at 130 ° C. The time required for the filling operation was several minutes. Immediately after the filling was completed, an amplitude vibration of 500 Hertz was applied to the entire panel for 30 seconds. As a result, the joint material instantly leveled in the joint gap between the tiles, and the surface formed a concave smooth semi-glossy surface. Further, it was confirmed by visual observation of the cut section of the product after the joint was completely solidified that the hot-melt joint material was uniformly filled in the gap. After the panel after construction was left to stand in the room at room temperature for 5 days and then left at 35 ° C./80% humidity for 1 month, no mold was found in the joints of the taken out panel. In addition, in the observation after the filling and solidification of the joints, no cracks were found, and the joints formed were very scratch-resistant and glossy in appearance.

Embodiment 3. The hot-melt joint material (A) obtained in Example 1 was melted at a melting temperature of 200 ° C. by a new melter 60, which is a manual type applicator manufactured by Hakuko Metal Co., Ltd., and the same white tile as shown in Example 1 was pasted on the panel. A bead-like discharge was made to the joint forming groove, and a gap filling coating was performed while applying a vibration of 50 Hz to the entire panel. After the filling is completed, the construction panel is heated to about 120 ° C. in a dryer and taken out, and vibration of 50 hertz is applied to the panel for 5 seconds to increase the impregnation rate of the hot melt joint material, and then the softened hot melt joint is quickly softened. The protrusion and the convex portion were cut with a concave chisel. After the partial correction, vibration of 50 Hz was applied again for 30 seconds at the same temperature to perform concave smooth surface processing on the repaired portion. As a result, the appearance of the joint filling portion was able to form a beautiful concave smooth surface having a uniform filling film pressure. Leave the panel after construction at room temperature for 5 days at 35 ℃ / 80
No mold or the like was found in the joints of the panel taken out after being left for 1 month in the state of% saturated humidity. In addition, in the observation after the filling and solidification of the joints, no cracks were found and the joints formed were very scratch resistant and glossy.

Comparative Example 1. A water-based cement joint material containing white cement and fine alumina powder in a ratio of 1: 2,
Finishing was carried out by filling a gap in a joint forming groove of a panel with a white tile similar to that shown in Example 1 using a coating iron and finally wiping off excess cement joint with a hydrous sponge. .. The adjusted cement joint material had a life of about 20 minutes at room temperature, and was forced to be quickly constructed, and the joint material left for several hours could not be used at all. After completion of the construction, the composition was left at room temperature and cured for 3 days. This panel is 35 ℃ / 85% saturated humidity
When left for 1 month in the above condition, black mold and blue mold were considerably generated.

Comparative Example 2. As an ionomer resin, 30 parts of Himilan 1702 manufactured by Mitsui Polychemical Co., Ltd.,
7 of natural carnauba wax with a melting point of 82-85 ° C crystallinity
The pale yellowish white hot melt joint material prepared by melting and kneading 0 parts, 30 parts of titanium white, and 150 parts of 200 mesh pass calcium carbonate at a temperature of 180 ° C.
High thixotropy of 1.7 at 30 ° C (constant divided by the viscosity value when the rotor speed is doubled to the viscosity value measured at a certain rotation speed with a rotor measured by a B-type viscometer). It was a hot melt joint material. With respect to the joint forming groove of the panel to which the white tile similar to that shown in Example 1 was attached,
As in the case of Example 3, when a coating was carried out using a hand gun without giving any vibration, the gap filling property was uneven, and the adhesion at the tile edge portion was extremely uneven. Further, the smoothness of the joint surface was a problem in that the portion in contact with the tile edge portion was solidified in a raised state, and the central portion of the joint width was solidified in a concave shape. Then 1 panel
An attempt was made to heat the joint material by heating it to 30 ° C. However, the leveling was not improved. The mold generation test result of this panel at 35 ° C./saturation humidity of 80% showed no generation of black mold.

Comparative Example 3. In Comparative Example 2, gap filling was performed in a state in which the panel was preheated to 130 ° C. in the joint forming groove of the panel on which the same white tile as in Example 1 was attached. The joint filling product obtained was a detailed visual observation result after the joint processing was completed, and when it was applied to a part, not a little convex surface or fine crater surface due to the rise of bubbles generated by some factor was observed. It was a result of having problems such as lack of surface smoothness and aesthetic sense.

[0014]

As is clear from the examples, the gap filling processing method using the hot melt joint material of the present invention is most characterized in that it exhibits excellent short-time workability and excellent finished appearance. Can be done. From Comparative Example 1, when the cement joint of the conventional method is used, the finish appearance of the joint is excellent, but the problem that mold is generated in a considerably short time and the construction require life and skill of the joint material. Had a problem. Further, as shown in Comparative Examples 2 and 3, in the gap filling process of the hot melt joint material which does not give vibration, the finished appearance showed a result inferior to that of the conventional cement joint construction method. It is essential that the present invention is highly practical as a preferable labor-saving type gap filling processing method in the decorative tiled panel manufacturing market.

Claims (4)

[Claims] 1. When filling a gap using a hot melt joint material, vibration is applied at the time of filling and / or after completion of filling,
A method for filling a gap in a hot melt joint material, which is characterized by improving the deep area filling property and the smoothness of the finished surface of the joint. 2. The hot-melt joint material comprises (A) 10 to 50% by weight of the thermoplastic base resin, and (B) 90 of the wax.
~ Total thermoplastic composition consisting of 50 wt% 99.9 ~
The method for filling a gap in a hot-melt joint material according to claim 1, wherein the content is 10% by weight and 0.1 to 90% by weight of the inorganic and / or organic filler (C). 3. The vibration is 5 to 10 as mechanical amplitude vibration.
The method for filling a gap in a hot melt joint material according to claim 1 or 2, wherein the method is in the range of 00 hertz. 4. The method for filling a gap of a hot melt joint material according to claim 1, 2 or 3, wherein the gap filling of the joint material is applied to a tile panel for a unit bath.