JP6668103B2 - Pressing device for seam processing and seam processing method using the same - Google Patents

Description

  The present invention relates to a novel pressing device for seam processing and a seam processing method using the same.

  When laying an interior sheet such as a floor material, abutting portions where edges of adjacent interior sheets face each other are generated. The butted portion is a portion where the edges of the interior sheet are in contact with each other or a portion where the edges are opposed to each other with a small interval. Such a butted portion serves as a water entry port, and allows water to penetrate into the base. For this reason, processing (hereinafter, also referred to as "seam processing") for forming a seam portion, which is a portion that plays a role of integrally joining the interior sheets, is performed in the butted portion.

  Various methods have been proposed for performing the joint processing. For example, there is a method in which a butt portion of an interior sheet is grooved by a cutting machine or a grooving cutter and welded with a welding rod, and then a surplus portion is smoothly cut and finished.

  Also, for example, a floor material is stuck on the base material via an adhesive, and an adhesive tape is stuck to the floor material surface so as to cover an upper part of a seam having a predetermined width gap formed between the stuck floor materials. Then, a cut is formed along the seam on the adhesive tape, a seam liquid injection nozzle is inserted into the cut of the adhesive tape, and the seam liquid is injected into the seam while moving the injection nozzle along the cut of the adhesive tape. A seam construction method of a flooring material, which is characterized by injecting and peeling an adhesive tape, is known (Patent Document 1).

  Meanwhile, there is also known an interior sheet in which a protective layer of an ionizing radiation-curable resin such as an ultraviolet-curable resin is formed to protect the surface (floor surface or the like) (Patent Documents 2 to 3). ). Also in the construction using the interior sheet having such a protective layer on the surface, the seam treatment is performed using the seam liquid.

  The seam liquid as described above is generally prepared so as to strongly dissolve a part of the interior sheet in order to obtain a strong bonding force after the seam processing. When such a seam solution adheres to the surface of the protective layer, the protective layer may be dissolved and damaged. This not only reduces the function of the protective layer, but also impairs its appearance. On the other hand, if an attempt is made so that the seam liquid does not adhere to the surface of the protective layer at all, it takes much time and effort, and as a result, there is a possibility that the construction period is delayed and the construction cost is increased.

  Accordingly, the applicant of the present application has developed the following seam treatment method for the purpose of providing a construction method capable of performing an efficient seam treatment while suppressing or preventing damage to the protective layer on the surface of the interior sheet. Has applied for a patent.

  That is, a seam treatment method for joining butted portions of interior sheets each having a protective layer containing an ionizing radiation-curable resin formed on a surface thereof, and (1) at least substantially to the protective layer A step of injecting a seam treating agent having no solubility into the butt portion, and (2) before the injected seam treating agent is cured, the seam treating agent in the butt portion and the protective layer are brought into contact with each other. There is proposed a seam treatment method including a step of attaching an adhesive tape across a butt portion.

  In this method, for example, as shown in FIGS. 4A to 4C, on the assumption that the adhesive tape is peeled off after the seam treatment agent is cured, the seam treatment agent injected into the butt portion is cured before the seam treatment agent is cured. One of the features is to stick the adhesive tape from above. Then, by peeling off the adhesive tape after the seam treatment agent has hardened, the seam treatment agent protruding from the butt portion can be efficiently removed as shown in FIG. 4C.

  In this case, by pressing from above when sticking to the adhesive tape, the seam treating agent can be spread to the deep portion of the butt portion, and the cured seam treating agent can be more effectively peeled and removed. The means for pressing is not particularly limited, and for example, an existing pressure roller (for example, Patent Literature 4, Patent Literature 5, Patent Literature 6, etc.) may be used. When such a pressure roller is used, the pressing can be performed in a relatively short time and uniformly, compared with the case of pressing with a finger.

Japanese Patent No. 3388960 JP-A-2002-105874 JP 2014-84685 A JP 2008-2239 A JP 2010-1395 A JP 2011-122367 A

  However, according to the knowledge of the present inventors, it has been confirmed that when an existing pressure roller is used in the above-described seam treatment method, the seam-treating agent may not be sufficiently removed and removed in some cases. FIG. 7 shows a schematic diagram of a cross section when the adhesive tape is attached to the surface of the interior sheet. In particular, as shown in FIG. 7B, an existing pressure roller having a gripper 11 ′, a support 13 ′, and a roller 12 ′ is used, and especially for interiors having irregularities (for example, irregularities due to embossing) on the surface. When the sheet 1a is applied, since the adhesive tape 3 cannot be pressed so as to sufficiently follow such irregularities, the adhesive tape does not reach the seam treatment agent that has entered the concave portion (groove portion), and the adhesive tape is removed. As a result of the inability to remove the seam treatment agent in the concave portion when peeling off, an extra seam treatment agent remains on the surface of the interior sheet.

  On the other hand, it is conceivable to use a roller made of a relatively soft material. If such a roller is used, it is possible to remove the seam treatment agent existing in the concave portion to some extent. On the other hand, since the material of the roller is soft, the pressure is not sufficiently transmitted, and it becomes impossible to introduce the joint treatment agent particularly to the deep portion of the butted portion.

  Accordingly, an object of the present invention is to provide a pressing device and a seam processing method using the pressing device used when pressing the seam processing agent before curing via an adhesive tape in order to remove the seam processing agent after curing. To provide.

  The present inventor has conducted intensive studies in view of the problems of the prior art, and as a result, has found that the above object can be achieved by employing a pressing device having a specific configuration, and has completed the present invention.

That is, the present invention relates to the following seam processing pressing device and a seam processing method using the same.
1. A pressing device used to press the seam-treating agent before curing via an adhesive tape to remove the seam-treating agent after curing,
(1) a) a grip portion, b) a support portion connected to the grip portion, and c) a rotatable roller portion attached to the support portion,
(2) The roller portion includes a core portion made of a hard material, and an elastic layer laminated adjacent to the outer periphery of the core portion, and the elastic layer is disposed as an outermost layer of the roller portion. Yes,
A pressing device for seam treatment, characterized in that:
2. A seam treatment method for joining butt portions of interior sheets each having a protective layer containing an ionizing radiation-curable resin formed on a surface thereof,
(1) a step of injecting a seam-treating agent having substantially no solubility in at least the protective layer into the butt portion;
(2) a step of applying an adhesive tape across the butt portion so as to be in contact with the seam-treating agent and the protective layer in the butt portion before the injected seam-treating agent is cured; and (3) adhesion A seam processing method comprising a step of pressing the pressure-sensitive adhesive tape from above using the seam processing pressing device according to item 1 simultaneously with and / or after the step of attaching the tape.
3. 3. The seam treatment method according to the above item 2, further comprising a step of peeling off the adhesive tape after the injected seam treatment agent is cured.
4. The pressure-sensitive adhesive tape is a laminate including a base material layer and a pressure-sensitive adhesive layer formed on the outermost surface of any one of the base material layers, and the base material layer is formed of a porous fibrous material. 4. The seam processing method according to the above item 2 or 3, wherein

  ADVANTAGE OF THE INVENTION According to this invention, in order to remove the joint processing agent after hardening, the press apparatus used when pressing the joint processing agent before hardening via an adhesive tape and the seam processing method using the same are provided. be able to.

  In particular, in the present invention, after injecting a seam treatment agent that does not dissolve the protective layer on the interior sheet surface, before such seam treatment agent cures, an adhesive tape is stuck to the butt portion, and the present invention By pressing with the pressing device of the present invention, the narrow butting portion can be filled with the seam treatment agent all over, and the contact and adhesion with the seam treatment agent in the concave portion on the surface of the interior sheet can be effectively performed. As a result, when the pressure-sensitive adhesive tape is subsequently peeled off, the excess seam-treating agent on the protective layer can be efficiently removed.

  Therefore, in the step of injecting the seam treatment agent, the seam treatment agent may slightly overflow from the abutting portion to the surface of the protective layer, so that the injection step can be completed quickly. As a result of these acting comprehensively, efficient joint processing is realized, and the original performance of the protective layer can be effectively exhibited.

  Further, in the present invention, since the adhesive tape is applied before the seam treatment agent is cured, dust, dust, sand, etc. can be prevented from adhering to the seam treatment agent, and immediately without waiting for the seam treatment agent to cure. Can be used for use. For example, when a floor material is used as an interior sheet, the pressure-sensitive adhesive tape is attached to the surface of the floor material, so that there is substantially no problem even if the user steps on the floor.

  The method of the present invention having such characteristics is suitable as a method of installing interior sheets (particularly flooring sheets) such as houses, commercial facilities, medical facilities, indoor passageways, exterior corridors, verandas, balconies, and the like. is there.

FIG. 2 shows a plan view of a plurality of interior sheets (floor materials) laid with a butted portion. As a first embodiment of the present invention, an example of a procedure for filling a butt portion with a seam treatment agent will be described. As an example of an embodiment of the present invention, a state in which an adhesive tape is stuck to a butt portion is shown. It is a figure which shows the procedure from sticking of an adhesive tape to peeling. As a second embodiment of the present invention, an example of a procedure for filling a butt portion with a seam treatment agent will be described. The procedure of the conventional seam processing method will be described. 7A shows a state in which an adhesive tape is stuck on the surface of the interior sheet, FIG. 7B shows a state in which the adhesive tape is pressed by an existing pressure roller, and FIG. 7C shows a pressing for seam treatment of the present invention. The state which pressed the adhesive tape with the instrument is shown. It is a figure showing an embodiment of a press instrument for joint processing of the present invention. FIG. 9 is a view of the roller as viewed from a direction A in FIG. 8. It is a figure which shows the result of having observed the floor material surface after peeling an adhesive tape in Example 1 and Comparative Example 1. FIG. 10A shows Comparative Example 1, and FIG. 10B shows Example 1.

1. The pressing device for seam treatment of the present invention is a pressing device used when pressing the seam processing agent before curing via an adhesive tape in order to remove the seam processing agent after curing. hand,
(1) a) a grip portion, b) a support portion connected to the grip portion, and c) a rotatable roller portion attached to the support portion,
(2) The roller portion includes a core portion made of a hard material, and an elastic layer laminated adjacent to the outer periphery of the core portion, and the elastic layer is disposed as an outermost layer of the roller portion. Yes,
It is characterized by the following.

  FIG. 8 shows an external view of an example of the seam processing pressing device (the device of the present invention) of the present invention. In a device 10 of the present invention shown in FIG. 8, a support portion 13 is connected to a tip of a grip portion 11. The roller unit 12 is attached to the tip of the support unit 13 so as to be rotatable.

  At the time of seam processing, it is possible to manually operate by holding the grip portion 11 with a hand. The size and shape of the grip portion 11 are not particularly limited, and may be a size and shape that can be easily grasped by an adult by hand. In addition, the material of the grip portion 11 is not limited, and any of a wooden material, plastics, metal, and the like can be adopted.

  One of the support portions 13 is connected to the grip portion 11. As shown in FIG. 8, when the grip part 11 has a cylindrical shape, the support part 13 may be attached to the bottom part thereof. The connection method is not particularly limited as long as a predetermined strength or the like can be secured, and for example, any of fixing with screws, fixing with an adhesive, and the like can be adopted. Further, in FIG. 8, the support portion 13 and the grip portion 11 are shown as separate components, but a case where both are manufactured integrally is also included in the present invention.

  The roller 12 is rotatably attached to the other end of the support 13. The attachment means may be of the same type as a known or commercially available rotary roller. For example, a mounting method using a bearing can be suitably adopted.

  The size and shape of the support portion 13 can be appropriately set according to, for example, the size of the roller portion to be attached. Further, in FIG. 8, the support portion 13 is attached to only one of the bottom surfaces of the roller portion, but the support portion 13 may be attached to both of the two bottom surfaces of the roller portion. In addition, the material of the support part 13 should just be a material which transmits a predetermined press intensity sufficiently to a roller part, and normally, for example, it is desirable to be metal (for example, stainless steel etc.).

  The roller portion 12 is a portion that comes into contact with the surface of the pressure-sensitive adhesive tape when pressing the joint treatment agent before curing via the pressure-sensitive adhesive tape. FIG. 9 shows a state in which the roller portion 12 is viewed from the direction A in FIG.

  As shown in FIG. 9, the roller portion 12 includes a core portion 21 made of a hard material, and an elastic layer 22 laminated adjacent to the outer periphery of the core portion. Is arranged as the outermost layer of In FIG. 9, an elastic layer 22 is laminated on the outer periphery of a cylindrical core portion 21 so as to be concentric when viewed from the direction A. In FIG. 9, the support portion 13 is exposed, but may be in a form that is not exposed.

  The core 21 is made of a hard material. Mainly, the core portion 21 has a function of using the hardness thereof to spread the seam-treating agent before curing to the deep portion of the butt portion. In general, the abutting portion between the interior sheets is an extremely narrow gap, so that the seam treatment agent hardly flows to the deep portion, or it takes time to flow to the deep portion. On the other hand, if the device of the present invention is used, it becomes possible to effectively push the seam-treating agent deeply, particularly by pressing the core portion 21.

  From such a viewpoint, a material having a predetermined hardness can be selected as the hard material forming the core portion 21, and for example, metal, hard plastics, ceramics, or the like can be suitably used. In particular, it is preferable to use a metal such as iron, stainless steel, or brass, for example, because it has high hardness and can expect a pressing effect due to its own weight.

  In FIG. 9, the core portion 21 is formed of a single hard material, but may be configured such that different hard materials are stacked concentrically.

  As shown in FIG. 9, the elastic layer 22 is laminated adjacent to the outer periphery of the core portion 21 and is disposed as the outermost layer of the roller portion. The elastic layer 22 has a function of bringing the adhesive tape into close contact with the seam treatment agent when the seam treatment agent before curing is pressed by the roller unit 12 from above the adhesive tape. For example, in the case where fine irregularities are formed on the surface of the interior sheet by embossing or the like, the pressure can be transmitted so that the pressure-sensitive adhesive tape can sufficiently contact the concave portions by the elastic layer 22 in particular. The seam treatment agent after curing can be efficiently removed by peeling.

  From such a viewpoint, an elastic material can be used as a material forming the elastic layer 22, and for example, a rubber-based foam material (sponge) can be suitably used. As the rubber, known or commercially available rubbers such as natural rubber, styrene butadiene rubber, butadiene rubber, chloroprene rubber, butyl rubber, nitrile rubber, acrylic rubber, ethylene propylene rubber, urethane rubber, silicone rubber, and fluorine rubber are used. be able to. A foamed (porous) material obtained by blending a foaming agent with these rubbers can be suitably used as the elastic layer.

  The hardness and thickness of the elastic layer 22 may be appropriately set according to the types of the interior sheet, the seam treatment agent, the elastic layer, and the like used during construction. The hardness is usually 50 or less, usually 5 to 30, and more preferably 5 to 20 in Asker C type (SRIS (Japanese Rubber Association Standard) 0101). The thickness is usually about 1 to 10 mm, particularly preferably 1 to 5 mm, and more preferably 1 to 3 mm. By setting the thickness within such a range, the function of the core can be more effectively exhibited together with the function of the elastic layer.

  In FIG. 9, the elastic layer 22 is formed on the entire outer periphery of the core portion 21, but may be formed on a part of the outer periphery. Further, the elastic layer 22 may be formed integrally with the core portion 21, or an elastic layer sheet may be laminated on the outer periphery of the core portion 21 by, for example, an adhesive or an adhesive tape afterward. .

  Further, the elastic layer 22 is formed of a single elastic material in FIG. 9, but may be configured such that different elastic materials are stacked concentrically.

  The device of the present invention is used when pressing a seam-treating agent before curing via an adhesive tape. The elastic layer 22 is grounded to the adhesive tape, and the roller portion is rotated back and forth, and the seam is applied from above the adhesive tape. What is necessary is just to press a processing agent. More specific usage methods will be described later.

2. Seam treatment method (the method of the present invention)
The present invention also includes a seam treatment method using the device of the present invention. That is, a seam treatment method for joining butted portions of interior sheets having a protective layer containing an ionizing radiation-curable resin formed on a surface thereof,
(1) a step of injecting a seam-treating agent having substantially no solubility in at least the protective layer into the butt portion;
(2) a step of applying an adhesive tape across the butt portion so as to be in contact with the seam-treating agent and the protective layer in the butt portion before the injected seam-treating agent is cured; and (3) adhesion A seam treatment method characterized by including a step of pressing the adhesive tape from above using the device of the present invention simultaneously with and / or after the step of attaching the tape.

Is not particularly restricted but includes applications or application site of the sheet for interior sheet interior, eg flooring include but are various wall materials, etc., may be particularly applicable to floor coverings. That is, the seam treating agent can be suitably used in a process for filling a butt portion between a plurality of floor materials (particularly, sheet-like floor materials). Therefore, the method of the present invention can be suitably applied to seam treatment of a vinyl chloride floor tile such as a composition vinyl chloride floor tile or a multi-layer vinyl chloride floor tile as a floor material mainly composed of a vinyl chloride resin. it can.

  As the interior sheet used in the present invention, any sheet mainly composed of various synthetic resins such as a vinyl chloride resin and a polyolefin resin can be used. In particular, in the present invention, a sheet mainly composed of a vinyl chloride resin can be suitably used.

  In the present invention, "mainly composed of a vinyl chloride resin" means that 1) when the interior sheet has a single-layer structure of a sheet body (base layer), the sheet body is made of a vinyl chloride resin. 2) When the interior sheet has a multilayer structure of a sheet body and another single layer or multiple layers, it means that at least the sheet body is made of a vinyl chloride resin. . In particular, when the interior sheet has a multilayer structure, it is desirable that 50% or more, particularly 80% or more of the thickness thereof be occupied by a layer made of a vinyl chloride resin. That is, by this, 50% or more, particularly 80% or more of the area of the surfaces where the interior sheets come into contact with each other in the seam processing is made of the vinyl chloride resin, so that a more effective seam processing can be performed.

  When the interior sheet has a multilayer structure, for example, a laminate in which at least one of a design layer, a reinforcing layer, a surface protective layer, and the like is formed on a sheet body made of a vinyl chloride resin can be used.

  In particular, in the present invention, a protective layer containing an ionizing radiation-curable resin is formed on the sheet surface. The ionizing radiation-curable resin refers to a resin having an energy quantum capable of crosslinking and polymerizing a monomer or the like in a charged particle beam or an electromagnetic wave, that is, a resin crosslinked and cured by irradiating an electron beam or an ultraviolet ray. The ionizing radiation-curable resin is, for example, a resin in which a curable monomer or oligomer is cured by ionizing radiation.

  The curable monomer or oligomer is not particularly limited as long as it can be cured by ionizing radiation. As the curable monomer, a monomer (monofunctional monomer, bifunctional monomer or trifunctional or higher polyfunctional monomer) capable of exhibiting properties such as hardness, gloss, and stain resistance required for the protective layer and suitable for coating. Functional monomers) can be used alone or in combination of two or more. As the curable oligomer, an oligomer which can exhibit hardness, gloss, stain resistance, and the like required for the protective layer and has properties suitable for coating can be used. Specifically, bisphenol A type, novolak type, polybutadiene type epoxy (meth) acrylate, polyether type urethane (meth) acrylate, etc. can be used alone or in combination of two or more.

  Examples of the curable monomer or oligomer include a monomer or oligomer having a polymerizable unsaturated bond group such as a (meth) acrylate group and a (meth) acryloyloxy group or an epoxy group in a molecule.

  Specific examples of the curable monomer include, for example, styrene monomers such as α-methylstyrene, methyl (meth) acrylate, 2-ethylhexyl (meth) acrylate, dipentaerythritol hexa (meth) acrylate, dipentaerythritol Examples include penta (meth) acrylate, urethane (meth) acrylate, and polyol compounds having two or more thiol groups in the molecule. Specific examples of the curable oligomer include, for example, an urethane (meth) acrylate, a polyester (meth) acrylate, an epoxy (meth) acrylate, and an Ariiso inorganic hybrid obtained by condensing colloidal silicity with (meth) acryloylalkoxysilane ( Monofunctional (meth) acrylate or polyfunctional (meth) acrylate having a polymerizable unsaturated bond such as meth) acrylate, unsaturated polyester, epoxy, and the like.

  Among these, since it is possible to form the flooring material 1 having moderate flexibility and excellent heat resistance, chemical resistance, and durability, and excellent adhesion to the flooring material body, urethane (meta) ) It is preferred to use acrylates.

  Further, the molecular weight of the curable monomer or oligomer is not particularly limited, but is, for example, in the range of 200 to 10,000.

  In the present invention, since a relatively strong protective layer can be formed and is versatile, a curable monomer or oligomer which is cured by ultraviolet rays can be suitably used. In other words, as the ionizing radiation curable resin, an ultraviolet curable resin can be particularly preferably used. The UV-curable resin is not particularly limited, and includes, for example, unsaturated polyesters such as a condensate of an unsaturated dicarboxylic acid and a polyhydric alcohol, methacrylates such as polyester methacrylate, polyether methacrylate, polyol methacrylate, melamine methacrylate, and polyester acrylate. And acrylates such as epoxy acrylate, urethane acrylate, polyether acrylate, polyol acrylate, and melamine acrylate.

  A radical polymerization initiator can be added to the curable monomer or oligomer as needed. The radical polymerization initiator is a compound that generates a radical upon irradiation with ionizing radiation, and a conventionally known hydrogen abstraction type or photocleavage type may be used alone or in combination of two or more. A photosensitizer may be used in combination with such a radical polymerization initiator, if necessary.

  Examples of the radical polymerization initiator include 2,2-dimethoxy-2-phenylacetophenone, acetophenone, benzophenone, xanthone, 3-methylacetophenone, 4-chlorobenzophenone, 4,4′-dimethoxybenzophenone, benzoin propyl ether, and benzyldimethyl. Ketal, N, N, N ', N'-tetramethyl-4,4'-diaminobenzophenone, 1- (4-isopropylphenyl) -2-hydroxy-2-methylpropan-1-one, etc. And the like.

  The method for forming the protective layer is not particularly limited, and is formed by, for example, forming a coating film by applying a liquid ionizing radiation-curable resin composition, and then curing the coating film by irradiating with ionizing radiation. be able to.

  The composition may contain additives such as an antistatic agent, a radical polymerization initiator, an ionizing radiation absorber, and an ionizing radiation stabilizer, in addition to the ionizing radiation-curable monomer and / or oligomer serving as the main component. good. Further, a solvent or the like may be contained within a range not to impair the effects of the present invention.

  The thickness of the protective layer is not particularly limited, but is usually about 0.005 to 0.040 mm, particularly preferably 0.010 to 0.030 mm, and more preferably 0.015 to 0.025 mm. preferable.

  In the present invention, particularly as the interior sheet, an interior sheet having irregularities formed on the surface can be suitably used. For example, the device of the present invention and the processing method of the present invention can be applied to an interior sheet having an embossed surface such as woodgrain or stonegrain. When such processing is performed on the surface, the seam-treating agent penetrates deeply into the concave portion (groove) formed by embossing. However, such a seam-treating agent is hardened by using the device of the present invention. It can be efficiently peeled later.

Injecting step In the injecting step, a joint treatment agent having substantially no solubility in at least the protective layer is injected into the butted portion.

  One of the features of the method of the present invention resides in that the seam-treating agent is injected into the butt portion without performing masking for preventing contamination of the interior sheet surface. This is because, in the method of the present invention, since a seam-treating agent that does not substantially dissolve in the protective layer is used, even if the seam-treating agent adheres to the protective layer, it can be easily removed. . On the other hand, in the conventional method, as shown in FIG. 2, for example, it is generally necessary to perform masking with an adhesive tape or the like to prevent contamination of the interior sheet surface prior to injection of the seam treatment agent. However, masking for preventing contamination of the interior sheet surface may not be performed.

a) Seam-treating agent In the method of the present invention, one object of the invention is to provide a seam-treating agent which does not substantially dissolve in the protective layer, for the purpose of omitting the step of masking to prevent contamination of the interior sheet surface. Characterize the points used.

  In general, liquid seam treating agents include, for example, 1) a resin solution type in which a resin component is dissolved in an organic solvent, 2) a solvent type containing no resin component and comprising one or a combination of two or more organic solvents, The resin component is divided into an emulsion type or the like in which a resin component is dispersed in an aqueous solvent. In the present invention, any type of seam treating agent can be used.

  In this case, the organic solvent or the aqueous solvent (both are collectively referred to as “solvent”) shows solubility in the protective layer. By making a selection while taking into account, a seam treatment agent that does not damage the protective layer can be employed.

  These solvents are not particularly limited, and known or commercially available solvents can be appropriately selected. For example, in addition to water, 1) alcoholic solvents such as ethanol, methanol, isopropyl alcohol, and benzyl alcohol; 2) ketone solvents such as acetone, methyl ethyl ketone and cyclohexanone; 3) isopropyl ether, methyl cellosolve, ethyl cellosolve, and tetrahydrofuran (THF) ), 4) ester solvents such as ethyl acetate, methyl acetate, butyl acetate, and cellosolve, and 5) glycol solvents such as ethylene glycol and diethylene glycol. One or more of these can be used.

  In the present invention, in particular, by appropriately selecting a solvent that does not substantially dissolve in the protective layer formed on the surface of the interior sheet, a seam-treating agent that does not substantially dissolve in the protective layer Can be prepared. Here, in the present invention, "having substantially no solubility with respect to the protective layer" means that such a property that a reduction in gloss on the surface of the protective layer formed on the surface of the interior sheet is not recognized at a visual level. means. Accordingly, in addition to the seam-treating agent that does not dissolve the protective layer at all, a seam-treating agent that hardly changes the gloss of the surface of the protective layer even if the surface of the protective layer is slightly dissolved is included in the present invention. .

  When a resin component is contained in the joint treatment agent, examples of the resin component include a vinyl chloride resin, a vinyl acetate resin, a urethane resin, an epoxy resin, and an acrylic resin. These can be used alone or in combination of two or more.

  In the present invention, a vinyl chloride resin can be particularly preferably used as the resin component. Examples of the vinyl chloride resin as a resin component include a vinyl chloride resin (homopolymer) and a copolymer containing vinyl chloride as a copolymerization component. Examples of such a copolymer include a vinyl chloride-vinyl acetate copolymer, a vinyl chloride-ethylene copolymer, a vinyl chloride-propylene copolymer, a vinyl chloride-styrene copolymer, and a vinyl chloride-isobutylene copolymer. And vinyl chloride-vinylidene chloride copolymer, vinyl chloride-butadiene copolymer, vinyl chloride-isoprene copolymer, vinyl chloride-chlorinated propylene copolymer, and the like. These resin components may be used alone or in combination of two or more. By using a vinyl chloride-based resin as the resin component, compatibility with a floor material mainly composed of a vinyl chloride-based resin is improved, and an effective seam treatment can be performed more reliably.

  In the present invention, it is particularly preferable to use at least a vinyl chloride-vinyl acetate copolymer as the vinyl chloride resin as the resin component. By using a vinyl chloride-vinyl acetate copolymer as a resin component, the solubility in organic solvents is improved, and damage to the surface of the interior sheet is minimized, and an effective seam treatment is more reliably performed. It becomes possible. That is, by improving the solubility in the organic solvent, the amount of the organic solvent having high solubility in a vinyl chloride resin such as THF can be suppressed to a minimum or zero. Surface damage can be minimized.

  The content of vinyl acetate in the vinyl chloride-vinyl acetate copolymer as the resin component is not particularly limited, but is usually 10 to 30% by mass, and particularly preferably 12 to 24% by mass. By setting the vinyl acetate content within the above range, the bonding strength between the interior sheets can be further increased, and even if the width of the butt portion is large, it does not flow down, and higher filling properties can be obtained. it can.

  The content of the resin component in the seam treatment agent can be appropriately set according to the type of the organic solvent to be used and the like, but is generally 20 to 35% by mass, and particularly preferably 20 to 30% by mass. preferable. By setting a relatively high concentration as described above, the interior sheets can be joined with relatively high strength without the organic solvent strongly dissolving the interior sheets. In addition, when the concentration of the resin component is increased, the viscosity increases, so that even if the width of the butt portion is large, the resin component does not flow down and higher filling properties can be obtained. As a result, it is possible to contribute to the efficiency of the seam processing.

  Further, in the seam treatment agent, an additive added to a known or commercially available seam solution may be blended as necessary within a range not to impair the effects of the present invention. For example, stabilizers, fungicides, weathering stabilizers, surfactants, dispersants, thickeners, plasticizers, preservatives, rust inhibitors, antibacterial agents, antifreeze agents, defoamers, film-forming auxiliaries, Matting agents and the like can be mentioned. The stabilizer is blended for the purpose of preventing discoloration of the resin component at normal temperature, and examples thereof include a metal-based stabilizer containing lead, barium, zinc, calcium, tin and the like, and an organic stabilizer such as an epoxy plasticizer. Examples of the weather stabilizer include an ultraviolet absorber, a light stabilizer and the like.

  The seam-treating agent is in the form of a liquid composition as a resin solution, and its viscosity is not particularly limited as long as it has fluidity at room temperature, and can be appropriately adjusted according to a site to be applied. If the viscosity of the treating agent of the present invention is too low, the treating agent may be easily injected into the gap, but may easily flow out to the ground surface. On the other hand, if the viscosity of the seam-treating agent is too high, it is difficult to flow out to the ground surface, but it may be difficult to inject the seam-treating agent into the gap. For this reason, it is preferable that the seam treating agent is set in a specific range in consideration of balance. For example, when the interior sheet is a floor material or the like, the viscosity at 23 ° C. is generally 40 to 20,000 mPa · s, particularly preferably 50 to 10,000 mPa · s, and more preferably 100 to 1100 mPa · s. Is more preferable. Here, the viscosity (mPa · s) is measured at a temperature of 23 ° C. using a BII type viscometer (manufactured by Toki Sangyo Co., Ltd., model name “BHII”) at a rotation speed of 20 rpm. Value.

The TI value of the processing agent having low fluidity is not particularly limited. The TI value is the ratio of the viscosity under low shear to the viscosity under high shear. If the TI value is high, the fluidity is relatively low after injection of the seam treatment agent, so that the seam treatment agent does not easily flow out to the base surface. On the other hand, if the TI value is low, the fluidity is relatively high in the state after the injection, and the seam treatment agent easily flows out to the base surface. Therefore, it is not preferable to set a very low value. For this reason, the TI value is preferably set relatively high, but needs to be set in consideration of the balance with the above-mentioned viscosity value. For example, the TI value of the treatment agent is usually preferably 1.0 or more. The upper limit of the TI value of the treating agent is not particularly limited, but is 8.0 or less, preferably 7.0 or less as a practical numerical value. In the present invention, the TI value is a value calculated by the following equation.
TI value = (viscosity measured at a rotation speed of 6 rpm) / (viscosity measured at a rotation speed of 60 rpm)
However, the viscosity used for calculating the TI value is measured using a BII type viscometer (manufactured by Toki Sangyo Co., Ltd., model name “BMII”) at a temperature of 23 ° C.

  The seam treating agent can be prepared by uniformly mixing these components. For mixing, a known device such as a mixer or a kneader can be used.

<Embodiment of seam treating agent used in the method of the present invention>
As an example of the embodiment of the seam treatment agent, it is a liquid composition containing a vinyl chloride resin and an organic solvent, wherein 1) the vinyl chloride resin is dissolved in an organic solvent, and 2) the organic solvent is a ketone solvent. A seam treating agent containing an alcohol-based solvent (hereinafter referred to as "the treating agent of the present invention") can be preferably used.

  The organic solvent used in the treatment agent of the present invention includes a ketone solvent and an alcohol solvent. By using these two kinds of organic solvents in combination, it is possible to effectively dissolve the resin component in the solvent and to suppress or prevent the surface of the interior sheet from being damaged by the solvent.

  The ketone solvent is not particularly limited, and examples thereof include acetone, methyl ethyl ketone, methyl isobutyl ketone, diisobutyl ketone, and cyclohexanone. Among them, methyl ethyl ketone is particularly preferable because it has relatively high volatility and lower volatility than alcohol.

  A ketone-based solvent having a higher volatility is preferable because drying after the seam treatment is faster, but a ketone-based solvent is more preferably lower in volatility than an alcohol-based solvent. That is, a combination of an alcohol-based solvent and a ketone-based solvent having higher volatility than the alcohol-based solvent can be suitably used. If the ketone-based solvent volatilizes before the alcohol-based solvent at the time of the seam treatment, the resin component that is insoluble in the alcohol-based solvent may become powdery and remain on the surface of the seam. On the other hand, when the alcohol-based solvent volatilizes first and then the ketone-based solvent volatilizes, a smooth seam portion is formed. When comparing the volatility, the vapor pressure of the solvent at 20 ° C. is a guide.

  The content of the ketone-based solvent in the treating agent of the present invention can be appropriately set according to the type of the organic solvent to be used, etc., and is generally 40 to 60% by mass, and particularly preferably 50 to 60% by mass. Is preferred.

  The alcohol solvent is not particularly limited, and examples thereof include methanol, ethanol, butanol, isobutanol, isopropyl alcohol, normal propyl alcohol, 1,3-butanediol, 1,4-butanediol, and benzyl alcohol. In particular, at least one of methanol, ethanol, normal propyl alcohol, and isopropyl alcohol is preferable because of its relatively high volatility and rapid drying after construction. Among them, particularly ethanol or a solvent containing ethanol as a main component is most preferable from the viewpoint of safety and the like.

  The content of the alcohol-based solvent in the treating agent of the present invention can be appropriately set according to the type of the organic solvent to be used and the like, but is generally 10 to 30% by mass, and particularly preferably 15 to 25% by mass. Is preferred.

  The ratio of the ketone-based solvent to the alcohol-based solvent in the treatment agent of the present invention is not particularly limited, but is preferably 150 to 350 parts by mass of the ketone-based solvent with respect to 100 parts by mass of the alcohol-based solvent. More preferably, the ketone solvent is used in an amount of 200 to 300 parts by mass with respect to 100 parts by mass. By setting the content within the above range, the resin component can be more reliably dissolved in the organic solvent.

  In the treating agent of the present invention, other solvents may be contained within a range not to impair the effects of the present invention, but the content of the other solvent is desirably 10% by mass or less in the treating agent of the present invention. . In particular, some amount of tetrahydrofuran (THF) may be contained, but from the viewpoint of not damaging the interior sheet, its content is preferably 5% by mass or less in the treating agent of the present invention.

  The treating agent of the present invention preferably contains a coloring agent. As the colorant, for example, in addition to known dyes and pigments, a toner containing a pigment or dye in a resin can be used. By including a coloring agent having the same or similar color as the interior sheet in the treatment agent of the present invention, the joint portion can be made inconspicuous and a floor structure or the like having an integrated appearance can be formed. Further, even when the seam treatment agent is not sufficiently filled, the treatment agent of the present invention can be easily refilled, and a seam portion having a good finish can be formed. At this time, as described above, when the seam portion is smoothly formed by the volatile combination of the alcohol-based solvent and the ketone-based solvent, the seam portion becomes less noticeable, and a floor structure or the like having a more integrated appearance is formed. can do.

  The treating agent of the present invention can be obtained by uniformly mixing these components so that the vinyl chloride resin is dissolved in the organic solvent. The mixing method is not limited as long as the vinyl chloride resin is dissolved in the organic solvent, and can be implemented by using a known device such as a mixer or a kneader.

  The order of blending these components is not particularly limited as long as the vinyl chloride resin can be dissolved in the organic solvent. In the present invention, in particular, 1) a step of preparing a dispersion by dispersing a vinyl chloride resin in an alcohol solvent (dispersion step); and 2) a vinyl chloride resin by mixing the dispersion with a ketone solvent. The treatment agent of the present invention can be suitably produced by a production method including a step of obtaining a solution (dissolution step).

  In the dispersion step, by using an alcohol-based solvent that is an organic solvent in which the vinyl chloride-based resin is not dissolved, the fine particles of the vinyl chloride-based resin can be highly dispersed in a liquid phase in advance. In particular, even when the vinyl chloride resin is a fine powder (for example, a particle diameter of 500 μm or less), a dispersion without lumps can be prepared using an alcohol solvent. Moreover, since the vinyl chloride resin is dispersed in the alcohol solvent before the dissolving step, the amount of the alcohol solvent used can be reduced. As a result, more efficient dissolution can be realized in the dissolving step. it can.

  In the dissolving step, the individual fine particles of the vinyl chloride-based resin in the dispersion are rapidly dissolved in the ketone-based solvent by mixing the ketone-based solvent, which is an organic solvent in which the vinyl chloride-based resin is dissolved, with the dispersion. .

  Thus, the treating agent of the present invention can be obtained. In other words, as the treating agent of the present invention, 1) a step of preparing a dispersion by dispersing a vinyl chloride resin in an alcohol solvent (dispersion step) and 2) mixing the dispersion with a ketone solvent. This makes it possible to suitably use a seam treatment liquid obtained by a production method including a step of obtaining a solution of a vinyl chloride resin (dissolution step).

  As the vinyl chloride resin, the organic solvent, and the like used in this production method, the same ones as described above can be used. In addition, the amounts of these used may be the same as those described in the above item 1.

b) Injection method In the injection step, the method of injecting the seam treatment agent is not particularly limited, and for example, a liquid seam treatment agent may be injected into the butt portion using a known nozzle member or the like. More specifically, a nozzle having a hollow or solid needle-like body is used, the needle-like body (needle tip) is pushed into a butt portion, and the seam-treating agent is filled by supplying the seam-treating agent to that portion. By doing so, the implantation step can be performed.

In the adhesive tape attaching step, in the adhesive tape attaching step, before the injected seam treating agent is cured, the adhesive tape is applied across the butt portion so as to be in contact with the seam treating agent and the protective layer in the butt portion. To wear.

  As shown in FIG. 4 (a), for example, the adhesive tape bonding step includes the step of joining the seam treatment agent 6 injected into the butt portion 2 and the protection layers 9a, 9b on the surfaces of both flooring materials (interior sheets). The adhesive tape 3 may be attached so as to contact both of them. In this case, since the seam treating agent 6 is in a liquid state before curing, and a part thereof protrudes from the abutting portion and covers a part of the surface of the protective layer, the adhesive tape 3 (preferably wider than the protruding portion) By using one adhesive tape, the adhesive tape attaching step can be effectively performed.

  In the prior art, as described above, the pressure-sensitive adhesive tape is used for the purpose of masking before injection, whereas in the method of the present invention, 1) protection from contamination during curing of the seam treatment agent, 2) curing of the seam treatment agent Later, an adhesive tape is used for the purpose of peeling and removing the excess cured seam treatment agent protruding from the abutting portion.

  The pressure-sensitive adhesive tape used in the tape adhering step is not particularly limited as long as it has desired adhesiveness and peelability. As its layer configuration, it is a laminate including a base material layer and an adhesive layer formed on the outermost surface of any one of the base material layers, and the base material layer is a porous fibrous material. The adhesive tape characterized by being comprised from can be used suitably. As an example, an adhesive tape including a strip-shaped substrate made of a porous fibrous material and an adhesive layer formed on the back surface of the substrate can be used. As such an adhesive tape, a known or commercially available adhesive tape can be used.

  As the base material, it is preferable to use a solvent-resistant base material that is hardly eroded by the organic solvent in the seam treatment agent. The substrate may be transparent, translucent or opaque.

Examples of such a substrate include a laminated sheet in which a cloth sheet and a polyolefin sheet such as polyethylene or polypropylene are laminated; a polyolefin sheet such as polyethylene or polypropylene; a paper sheet such as cellulose fiber. Further, it is preferable that the base material be stretchable at least in the width direction. The pressure-sensitive adhesive tape having the extensibility in the width direction expands in the width direction by applying a force in the plane. In particular, it is preferable to use an adhesive tape having extensibility in the width direction and the longitudinal direction. In the present invention, it is preferable to use a base material having high air permeability, particularly from the viewpoint that drying and hardening of the joint treatment agent can be promoted. As such a substrate, a porous fibrous material such as paper and nonwoven fabric can be used. Air permeability of the base material is preferably a ^{1cc / cm 2 · sec~500cc / cm} 2 · sec, more preferably ^{2cc / cm 2 · sec~300cc / cm} 2 · sec. This air permeability is a value measured using a Frazier-type air permeability tester manufactured by Toyo Seiki Seisaku-Sho, Ltd. in accordance with the air permeability test method of JIS L 1096.

  The pressure-sensitive adhesive for forming the pressure-sensitive adhesive layer is not particularly limited, but it is preferable to employ a solvent-resistant pressure-sensitive adhesive as in the case of the substrate.

  In particular, as the above-mentioned pressure-sensitive adhesive, a pressure-sensitive pressure-sensitive adhesive or the like which exhibits tackiness at normal temperature and which adheres to an adherend by applying pressure is preferable. Examples of the material of the adhesive include a rubber-based material and an acrylic-based material. The pressure-sensitive adhesive layer can be peeled off from the adherend without leaving the pressure-sensitive adhesive on the adherend, and can be re-applied.

  The adhesive strength of the adhesive layer is not particularly limited as long as a predetermined removability can be ensured, but is particularly preferably about 0.5 to 10 N / 10 mm, and more preferably 1 to 5 N / 10 mm. By setting the value in the above range, it is possible to obtain good releasability without hindrance such as adhesive residue while maintaining good adhesiveness. The adhesive strength in the present invention is a value when peeled off at an angle of 180 degrees, which is performed according to JISZ0237 "Testing method for adhesive tape and adhesive sheet".

The adhesive strength in the present invention is based on “N / 10 mm” as a unit as described above, but the adhesive strength F1 displayed in other test piece width W is calculated by the following conversion formula (1). The obtained value F2 is adopted.
F2 (N / 10 mm) = F1 × (10 / W) Expression (1)

Pressing Step In the method of the present invention, a step of pressing the pressure-sensitive adhesive tape from above using the device of the present invention is carried out simultaneously with and / or after the step of attaching the pressure-sensitive adhesive tape. By performing the pressing step, the adhesive tape and the seam treatment agent can be more reliably brought into contact with and adhered to each other. As a result, the portion of the cured body of the seam treatment agent that protrudes from the butt portion in the adhesive tape peeling step is more effectively used. Can be removed.

  In particular, in this step, since the pressing is performed using the tool of the present invention, as shown in FIG. 7C, the seam treatment agent is introduced to the deep part of the butt portion by the pressure of the core 21 in the roller portion 12 of the tool of the present invention. In addition, the adhesive tape 3 can effectively follow the unevenness mainly formed on the surface of the interior sheet 1a by the elastic layer 22, so that the cured seam treating agent can be efficiently removed.

  The method of performing the pressing step using the device of the present invention is not particularly limited.For example, the device of the present invention is abutted on an adhesive tape, and the adhesive tape is rotated from above on the adhesive tape so as to rotate the roller portion of the device of the present invention back and forth. Can be reciprocated. In particular, by reciprocating in the longitudinal direction of the adhesive tape, the pressing step can be completed in a relatively short time.

  Further, as shown in FIG. 7 (c), it is desirable that the degree of pressing be completely in contact with the seam treatment agent in the concave portion on the surface of the interior sheet 1a. Pressing may be performed to such an extent that a sufficient contact state can be ensured for the seam treatment agent after curing to be substantially completely removed.

Adhesive Tape Peeling Step The adhesive tape adhered in the adhesive tape adhering step may be peeled off after the joint treatment agent is cured. By peeling off the adhesive tape, a portion of the cured body of the seam treatment agent that protrudes from the butt portion can be removed. That is, after the injected seam treatment agent is cured, it is preferable to perform a step of peeling off the adhesive tape so that a portion (unnecessary part) of the cured body of the seam treatment agent that protrudes from the butt portion can be removed.

<Embodiment of seam processing>
In the method of the present invention, an embodiment in which a seam treatment is applied to a floor material made of vinyl chloride resin as an interior sheet will be described with reference to the drawings.

As shown in FIG. 1, a plurality of floor materials (sheet-like floor materials) 1 a to 1 d are arranged on a base in a state where butting portions of edges of the floor materials face each other. In FIG. 1, four floor materials 1a to 1d are shown for convenience, but the floor material A is not necessarily limited to four, and may be two or more. In addition, in FIG. 1, each of the floor materials 1 a to 1 d is formed in a square shape in a plan view, but is not limited thereto. For example, an arbitrary shape such as a rectangular shape in a plan view, a triangular shape in a plan view, and a regular hexagonal shape in a plan view. Can be selected. In addition, the plurality of flooring materials 1a to 1d have their edges formed in a straight line, but the edges may be formed in a curved line. Although it is difficult with conventional seam liquids to form gaps in the joint between curved shapes, it is difficult with the treatment agent of the present invention described above. Can also be suitably used.

  Abutting portions 2 are formed between the edges of each flooring 1a to 1d. The butting portion 2 is a slight gap generated between the butting end surfaces. That is, after the first floor material 1a is fixed on the base, the second floor material 1b is laid so that the butted end surface of the second floor material 1b is in contact with the butted end surface. In this case, the butted end faces are not necessarily in contact with each other over the entire edge portion, or the contacted portions are not so closely contacted that water does not leak. There is a slight gap through which moisture and the like pass. Such a gap is the butting portion 2 described above. If the width of the butted portion 2 is too large, it may be difficult to reliably join the butted portion. Therefore, the width of the butted portion 2 is usually 0 to 0.5 mm, preferably 0 to 0.3 mm.

  When the width of the butt portion 2 is 0 mm, the butt end surfaces are in contact with each other and macroscopically, there is no gap, but microscopically, due to minute unevenness existing on the butt end surface, Since the contacting portions are not necessarily in close contact without water leakage, it is necessary to join the butted portions 2.

Seam processing procedure (first embodiment)
FIG. 2 shows a first embodiment of the method of the present invention. FIG. 6 shows a conventional joint processing step for comparison. In FIG. 2, the illustration of the protective layer is omitted.

  As shown in FIG. 6, according to the conventional method, 1) a step of laying a plurality of floor materials while forming edges of the floor materials so as to face each other (a floor material laying step); A step of applying an adhesive tape to the surface of the floor material so as to straddle the butt portion (masking tape attaching step), 3) Form a cut line along the butt portion in the surface of the adhesive tape, and sandwich the cut line with the adhesive tape. (Step of forming a cut line), 4) a step of injecting a seam liquid from the cut line into the butted portion (injection step), 5) a step of drying the injected seam liquid ( (Drying step) and 6) a method including a step (peeling step) of peeling off the adhesive tape from the floor material after the seam treatment agent is dried.

  On the other hand, in the method of the present invention, as shown in FIG. 2, 1) a step of laying a plurality of floor materials so that edges of the floor materials (interior sheets) face each other (floor laying step); 2) a step of injecting the treatment agent of the present invention into the butt portion (injection step), 3) a step of applying an adhesive tape to the surface of the floor material so as to straddle the butt portion (adhesive tape attaching step), 4) an adhesive tape Simultaneously with and / or after the adhering step, a step of pressing the adhesive tape from above using the device of the present invention (pressing step), 5) a step of drying the injected treating agent of the present invention (drying step), and 6) It is preferably carried out by a method including a step of peeling the pressure-sensitive adhesive tape from the floor material after the treatment agent of the present invention has dried (pressure-sensitive adhesive tape peeling step). In the following, each step in the first embodiment will be described with reference to FIGS.

1) Floor material laying step As described above, the floor materials 1a to 1d are laid on the surface of the groundwork (not shown) as shown in FIG. This step corresponds to FIG.

  When laying the flooring materials 1a to 1d, the first flooring material 1a is fixed on the base using an adhesive or the like, and the edge of the second flooring material 1b is joined to the edge of the edge of the first flooring material 1a. And the second floor material 1b is fixed on the base. Thereafter, by repeating the same steps, a floor structure on which the plurality of floor materials 1a to 1d are laid is constructed. In this constructed floor structure (existing floor), the butted portion 2 is formed between the edges of the laid first floor material 1a and the second floor material 1b. The butted portion 2 of the existing floor is joined according to the following steps.

2) Injection Step As shown in FIGS. 2B to 2C, the tip of the nozzle of the injection tool 5 filled with the seam treatment agent is pushed into the butt portion 2 from the cut line 4, and the liquid seam treatment agent 6 is butted. Inject into 2. The liquid seam treating agent 6 that has entered the butt portion 2 slowly swells or dissolves the vinyl chloride resin constituting the flooring materials 1a and 1b, and finally cures the resin component contained in the seam treating agent 6. A strong bonding is realized by the synergistic effect of

3) Adhesive Tape Attaching Step As shown in FIG. 2D, in the present embodiment, before the joint treatment agent is cured, the adhesive tape 3 is used to straddle the butt portion formed on the existing floor surface. To the adhesive tape 3. For example, the application of the adhesive tape 3 is preferably performed within 10 minutes after the completion of the injection of the joint treatment agent, and particularly preferably immediately after the injection of the joint treatment agent.

  As described above with reference to FIG. 4 (a), the method of attaching the pressure-sensitive adhesive tape is such that before the injected seam treatment agent is cured, the seam treatment agent and the protective layer existing in the butt portion are contacted. The adhesive tape 3 may be stuck over the butted portion. In other words, an adhesive tape may be applied so as to cover all of the protruding seam treatment agent on the surface of the protective layer.

  It is preferable to use an adhesive tape 3 having a band-shaped base material and an adhesive layer provided on the back surface of the base material.

  In particular, in the pressure-sensitive adhesive tape attaching step, it is desirable to use a pressure-sensitive adhesive tape having a porous fibrous material as a base material, such as a paper sheet, from the viewpoint that the drying and curing of the joint treatment agent can be further promoted. As the paper sheet, for example, a paper sheet of cellulose fiber or the like can be suitably used. A paper sheet is preferable because it has a high air permeability so that the drying of the seam treating agent is accelerated. However, a resin sheet having a high air permeability can be expected to have the same effect as a paper sheet.

  As described above, the existing floor has the butt portion 2 between the butt end surfaces of the first floor material 1a and the second floor material 1b. As shown in FIG. 2D, the longitudinal direction of the butt portion 2 and the band-shaped adhesive tape 3 are made substantially parallel, and the first floor material 1a is placed so that the band-shaped adhesive tape 3 closes the upper opening of the butt portion. To the floor material surface so as to straddle the butted portion 2 between the floor material and the second floor material 1b. In this case, an adhesive tape may be adhered to each butt portion of each floor material. However, as shown in FIG. Two adhesive tapes may be adhered. In addition, FIG. 3 shows a state in which the adhesive tape is stuck so as to close the butt portion formed continuously in the vertical direction in the arrangement of the floor materials 1a to 1d shown in FIG. Thereafter, an adhesive tape may be applied so as to cover the butted portion 2 formed continuously in the lateral direction.

4) Pressing Step Simultaneously with and / or after the adhesive tape attaching step, the adhesive tape 3 is pressed from above using the device of the present invention.

  For example, the roller portion of the device of the present invention may be put on the adhesive tape 3 shown in FIG. 3, and the roller portion may be rolled on the adhesive tape and pressed while reciprocating. More specifically, as shown in FIG. 7 (c), the pressing may be performed while being pressed by the roller unit 12 of the device of the present invention. As a result, the seam treatment agent 6 can be filled deep into the butted portion 2 and the adhesive tape 3 can be adhered to the seam treatment agent that has overflowed the surfaces of the interior sheets 1a and 1b and has penetrated into the concave portions of the surfaces. Can be. As a result, the cured seam treatment agent can be more reliably and efficiently peeled and removed.

5) Drying Step After the joint processing agent 6 is injected into the butt portion 2, the drying is performed until the organic solvent contained in the liquid joint processing agent 6 is volatilized. Thereby, the liquid joint processing agent dries, and the joint portion 7 is formed. Drying may be either natural drying or forced drying. In the case of forced drying, drying may be performed by blowing cold air or hot air with a blowing device such as a blower or a dryer, or drying while heating. In the case of natural drying, the drying time is, for example, about 30 minutes to 24 hours, and preferably 1 hour to 5 hours.

  In the process of drying the seam treating agent 6, the swollen or dissolved vinyl chloride resin constituting the floor materials 1a to 1b hardens, or the vinyl chloride resin constituting the floor materials 1a to 1b and the seam treating agent 6 The resin component contained is hardened, and the edges of the first flooring 1a and the edges of the second flooring 1b are integrally connected via a seam 7 made of a cured body made of a seam treatment agent. Joined.

6) Adhesive Tape Peeling Step As shown in FIG. 2 (e), after the seam treatment agent is dried and cured to form the seam portion 7, the adhesive tape 3 is removed from the first floor material 1a and the second floor material 1b. By removing while peeling, a floor structure in which the butted portions 2 are joined via the joint portions 7 is obtained as shown in FIG.

  When the butt portions 2 are joined, the butt end surface 1b of the first floor member 1a and the butt end surface 2b of the second floor member 1b substantially disappear. For this reason, the obtained floor structure is excellent in water sealing property, and the seam treatment agent hardly damages the floor material surface, so that an excellent aesthetic appearance free from dirt, damage, and the like can be obtained.

  According to the method according to the embodiment of the present invention, even if a surplus of the seam treatment agent overflows from the butt portion in the pouring step, the surplus can be easily removed by the adhesive tape after drying. Therefore, the seam processing can be performed relatively easily. For example, as shown in FIG. 4, when the seam treatment agent 6 is injected so as to protrude slightly from the butt portion (FIG. 4A), the adhesive tape 3 is applied from above the seam treatment agent 6 before the seam treatment agent 6 is cured. If the adhesive tape 3 is peeled off after the affixing (FIG. 4 (b)) and the seam treating agent has been cured, the part (unnecessary part) of the seam 7 protruding from the butt portion adheres to the adhesive tape side. It can be removed relatively easily (FIG. 4 (c)). As a result, since the joint treatment agent may slightly protrude at the stage of the injection step, the injection step can be efficiently performed. Further, in general, when the seam-treating agent is dried and hardened, “thinning” (volume shrinkage) occurs, and there is a possibility that a dent at the abutting portion may be conspicuous. As a result of suppressing or eliminating such a problem of the occurrence of the depression, as shown in FIG. 4C, the surface of the cured body of the joint portion 7 is arranged substantially flush with the surface of the interior sheet (the surface of the protective layer). You can make it.

  Further, after the injection step and before the joint treatment agent is completely dried and hardened, the adhesive tape serves as a protective layer, which can effectively prevent dust, sand, and the like from adhering to the injection portion. For this reason, there is almost no problem even if the stepping agent is stepped on, for example, by a person before the joint treatment agent is completely dried and hardened, which can contribute to, for example, shortening of the construction period and efficiency.

Joint processing procedure (second embodiment)
FIG. 5 shows a second embodiment of the method of the present invention. In FIG. 5, the display of the protective layer is omitted.

  In FIG. 5, 1) a step of laying a plurality of floor materials so that edges of the floor materials (interior sheets) face each other (floor laying step), and 2) a process of laying the floor materials facing each other at the butted portion. Turning at least one side and injecting the treatment agent of the present invention into a region corresponding to the butt portion (injection step); 3) attaching an adhesive tape over the surfaces of both floor materials so as to straddle the butt portion (adhesion) Tape attaching step), 4) Step of pressing the adhesive tape from above using the device of the present invention (pressing step) at the same time and / or after the adhesive tape attaching step (pressing step), 5) Injected treatment of the present invention The method includes a step of drying the agent (drying step) and 6) a step of peeling off the adhesive tape from the floor material after the treatment agent of the present invention is dried (adhesive tape peeling step). The second embodiment is substantially the same as the first embodiment except that the flooring is turned in the pouring step.

  According to the second embodiment, since the application of the joint treatment agent is facilitated, it is possible to contribute to an improvement in work efficiency. Further, since it is easy to visually confirm whether or not the seam treatment agent has been sufficiently applied, it is also possible to effectively reduce work mistakes such as, for example, residual coating and insufficient coating. Since the application amount of the seam treatment agent can be increased, it is possible to more reliably fill the butted portion. Furthermore, since a high-viscosity seam-treating agent can be used without any trouble, the degree of freedom in seam-treatment design is increased.

  In the second embodiment, in the injection step, at the time of injecting the treatment agent of the present invention, at least one of the floor materials facing each other is turned over, and the treatment agent of the present invention is injected into the region 8 corresponding to the abutting portion. In this case, one of the flooring materials is usually turned.

  The region 8 corresponding to the butt portion is not particularly limited as long as the butt portion can be joined, and may be, for example, the butt surface (side surface) of one unturned floor material or its periphery, or both floors. When the material is turned over, it may be any surface such as a base surface on which the butted portion is arranged.

  Hereinafter, examples and comparative examples are shown, and the features of the present invention will be described more specifically. However, the scope of the present invention is not limited to the examples.

Example 1
(1) Preparation of seam treating agent As a resin component, in Example 1, a powdery vinyl chloride-vinyl acetate resin (product name "Solvain M5R" manufactured by Nissin Chemical Industry Co., Ltd., vinyl chloride content: 76.3% by mass) , A vinyl acetate content of 23% by mass, a dicarboxylic acid content of 0.7% by mass, a particle size of 100 to 120 μm), and the resin component and denatured ethanol (ethanol 85% by volume, normal propyl alcohol 10% by volume and isopropyl alcohol 5% by volume) % Of the mixture), methyl ethyl ketone (MEK) was added, and the vinyl chloride-vinyl acetate copolymer was dissolved to prepare a resin solution.

  Next, a pigment (manufactured by Dainichi Seika Kogyo Co., Ltd.), an antibacterial and antifungal agent (product name "Deniside BF-1" manufactured by Nagase ChemteX Corporation), a plasticizer (diisononyl phthalate (DINP)) were added to the obtained resin solution. )) And a stabilizer (product name "SB-35" manufactured by Tokyo Fine Chemical Co., Ltd.) to obtain a seam treatment agent, and the ratio of each component in the treatment agent is shown in Table 1. The unit of the numerical value in each component in 1 is mass%.

(2) Implementation of seam treatment The seam treatment was carried out according to the first embodiment using the seam treating agent prepared in the above (1). A commercially available floor material (product name "Mature NW FS2009" manufactured by Tori Corporation) was used as the interior sheet. This floor material is formed with a protective layer (thickness: 20 μm) containing a urethane acrylate solventless UV curable resin (product name “Aurex NO.145TK” manufactured by China Paint Co., Ltd.). The size of one flooring material is 300 mm long × 100 mm wide × 2 mm thick (including the thickness of the protective layer).

  The vertical edges of the two flooring materials were butted against each other, and after the seam treatment agent was injected into the butted portion, an adhesive tape was applied before the seam treatment agent was cured (that is, within 5 minutes after the injection). Thereafter, the roller portion was reciprocated a plurality of times with a pressing device as shown in FIG. 8 while rolling the roller portion so that the adhesive tape could be in close contact with the substrate. In the pressing device used in this example, the roller portion had a core made of stainless steel (approximately 40 mm in width), and a commercially available ethylene propylene rubber sponge (30 mm in width, 2 mm in thickness, and 15 in hardness) on the outer periphery thereof. It is wound and fixed with a double-sided adhesive tape so as to form a single layer.

  After a certain period of time, the adhesive tape was slowly peeled off with fingers. In that case, 1) the presence or absence of damage on the floor material surface and 2) the presence or absence of the seam treatment agent remaining on the floor material surface were visually evaluated. Table 1 shows the results.

  In the evaluation of 1) above, “○” indicates that no damage (erosion) is observed on the floor material surface, “△” indicates that there is no noticeable damage on the floor material surface, but slight discoloration, and “△” indicates that the floor material surface Was evaluated as "x" when damage due to dissolution was observed.

  In the evaluation of 2) above, “○” indicates that the seam treatment agent does not remain on the floor material surface, and “△” indicates that the seam treatment agent generally does not remain but slightly remains in the embossed recess on the floor material surface. "", When the seam-treating agent remained, particularly in the embossed concave portion on the floor material surface, was marked "x".

  Further, in the above evaluation, the appearance of the floor material surface after the adhesive tape was peeled was also photographed. The result is shown in FIG.

Comparative Example 1
In Example 1, except that a commercially available pressure roller (roller was made of stainless steel) was used as the pressing member, the construction was performed in the same manner as in Example 1, and the test and evaluation were performed in the same manner as in Example 1 (2). . The external appearance was also photographed in the same manner as in Example 1. The results are shown in Tables 1 and 10, respectively.

  As is clear from the results in Table 1, it is understood that when the apparatus of the present invention is used, the cured seam treating agent can be effectively removed. This is apparent from FIG. 10 comparing the appearances of Example 1 and Comparative Example 1. In FIG. 10A showing the result of Comparative Example 1, a part where the seam treatment agent partially remains in the concave portion was confirmed, whereas in FIG. It turns out that a part is not recognized.

Claims (4)

A pressing device used to press the seam-treating agent before curing via an adhesive tape to remove the seam-treating agent after curing,
(1) a) a grip portion, b) a support portion connected to the grip portion, and c) a rotatable roller portion attached to the support portion,
(2) The roller portion includes a core portion made of a hard material, and an elastic layer laminated adjacent to the outer periphery of the core portion, and the elastic layer is disposed as an outermost layer of the roller portion. Yes,
(3) The thickness of the elastic layer is 1 to 3 mm, and the hardness of the elastic layer is 5 to 30 in Asker C type (SRIS (Japanese Rubber Association Standard) 0101).
A pressing device for seam treatment, characterized in that: A seam treatment method for joining butt portions of interior sheets each having a protective layer containing an ionizing radiation-curable resin formed on a surface thereof,
(1) A step of injecting a joint treatment agent having substantially no solubility in at least the protective layer into the butted portion such that a part thereof protrudes from the butted portion and covers a part of the surface of the protective layer. ,
(2) a step of applying an adhesive tape across the butt portion so as to be in contact with the seam treatment agent and the protective layer in the butt portion before the injected seam treatment agent is cured;
(3) simultaneously with and / or after the step of attaching the adhesive tape, pressing the adhesive tape from above using the seam processing pressing device according to claim 1, and (4) the adhesive tape, A seam treatment method comprising a step of removing a portion of the cured body of the seam treatment agent that protrudes from the butt portion and covers a part of the surface of the protective layer by peeling after the seam treatment agent is cured. The method according to claim 2 , wherein the width of the butted portion is 0 to 0.5 mm. The pressure-sensitive adhesive tape is a laminate including a base material layer and a pressure-sensitive adhesive layer formed on the outermost surface of any one of the base material layers, and the base material layer is formed of a porous fibrous material. The seam processing method according to claim 2 or 3, wherein