JP6959720B2 - Flooring material for stairs - Google Patents

Description

The present invention relates to a flooring material for stairs that is used by being attached to a staircase portion.

Conventionally, in order to reduce noise and improve anti-slip properties when going up and down stairs, a synthetic resin floor material for stairs that covers the portion from the tread surface of the stairs to the upper part of the stairs is known (Patent Document 1). ..
Further, in Patent Document 2, when adhering the floor sheet for stairs to the base, a specific adhesive for floor sheet construction for stairs is used up to at least 1/3 of the kicking portion following the corner portion, and the other parts are the other parts. A method for constructing a floor sheet for stairs using an adhesive is disclosed.
However, in this construction method, the plasticizer (for example, dioctyl phthalate) blended in the polyvinyl chloride resin (hereinafter, also referred to as "PVC resin"), which is widely used as a material for floor sheets, is gradually replaced with the vinyl chloride resin. There is a problem that the layer shifts to the adhesive layer (adhesive tape), the corners are deformed during storage, and the adhesive strength of the adhesive layer is reduced.
Once deformed, the adhesion between the floor sheet material and the base material deteriorates during construction, making it difficult to fit, so problems after construction are likely to occur, and peeling occurs when the adhesive strength of the adhesive layer decreases. The risk is high.
Further, in Patent Document 3, in order to reduce a decrease in adhesive strength, a rise-up coating portion of a staircase sheet and a rise-up of a staircase are provided on both sides of a tape base material made of a resin foam such as polyethylene containing no additive. A staircase structure attached via a double-sided adhesive tape provided with an adhesive layer made of an acrylic resin or the like is disclosed. However, the material and structure for attachment are different from those of the present invention.

Further, in Patent Document 4, when a walking tile or the like is installed on a vinyl chloride resin-based waterproof sheet, a plasticizing agent component flows out from the waterproof sheet at the periphery of a contact portion between the waterproof sheet and the walking tile or the like to make it waterproof. In order to prevent the sheet from deteriorating, a sheet waterproof structure in which a barrier layer made of a barrier film is provided between the waterproof sheet and a walking tile or the like is disclosed.
However, the object of this technique is not a staircase, and the object of construction and the purpose of construction are different from those of the present invention. It is an extension of the conventional technique that uses an adhesive, and is essentially different from the present invention that does not use an adhesive.

Japanese Unexamined Patent Publication No. 2004-197533 Japanese Unexamined Patent Publication No. 2003-221910 Japanese Unexamined Patent Publication No. 2003-293539 Japanese Unexamined Patent Publication No. 2003-213850

When a barrier layer that does not allow a plasticizer to pass is provided on the vinyl chloride resin of the floor material for stairs using the prior art, the barrier layer is made of vinyl chloride resin because the affinity between the general barrier layer material and the vinyl chloride resin is not good. It is necessary to use an adhesive to firmly laminate it on top.
Therefore, according to the present invention, a barrier layer can be formed without using an adhesive, and the barrier layer can prevent the plasticizer in the vinyl chloride resin from migrating to the adhesive layer, and is special as in the prior art. It is an object of the present invention to provide a flooring material for stairs that does not cause deformation of the corners of the nose and deterioration of the adhesive strength of the adhesive layer without using a proper adhesive structure.

The above problems are solved by the following inventions 1) to 3).
1) In a staircase floor material in which an adhesive layer is provided on the vertical attachment surface of the corner of the nose, a barrier layer is provided between the polyvinyl chloride resin layer and the adhesive layer to prevent plasticizer from passing through, and the barrier layer is provided. However, the floor material for stairs is characterized by having a layer made of a plasticized polyvinyl chloride resin and a heat-weldable material on the surface in contact with the polyvinyl chloride resin layer.
2) The floor material for stairs according to 1), wherein the heat-weldable material is a polyurethane-based ink.
3) The floor material for stairs according to 1) or 2), wherein the adhesive layer is made of an acrylic independent foam that functions as a pressure-sensitive adhesive.

According to the present invention, a barrier layer can be formed without using an adhesive, and the barrier layer can suppress the migration of the plasticizer in the vinyl chloride resin to the adhesive layer, and is special as in the prior art. It is possible to provide a flooring material for stairs that does not cause deformation of the corners of the nose and a decrease in the adhesive strength of the adhesive layer without using a sticking structure.

A partial cross-sectional view of an example of a flooring material for stairs of the present invention.

The present invention relates to a flooring material for stairs made of vinyl chloride resin, which is used by being attached to a staircase portion.
FIG. 1 shows a partial cross-sectional view of the nose corner portion according to an example thereof. The vinyl chloride resin layer 1 is used as a base material and is used by being pasted from the tread surface 5 of the stairs to the kicking upper surface 6. An ink layer 2, a barrier layer 3 for preventing the migration of the plasticizer in the vinyl chloride resin, and an adhesive layer 4 are provided on the sticking surface in the vertical direction. This is a staircase flooring material that facilitates the application of the staircase flooring material to the base 7 by suppressing the decrease in adhesive strength, and enables the barrier layer to be formed by the ink layer 2 without using an adhesive.
The nose corner portion refers to a range of about 3 cm downward from the upper right corner and about 5 cm to the left in FIG. 1, and an ink layer 2, a barrier layer 3, and an adhesive layer 4 are provided below the range. ..
Further, in FIG. 1, the thicknesses of the ink layer 2, the barrier layer 3, and the adhesive layer 4 are shown by being greatly enlarged in order to make the structure easier to understand, but the actual thickness of each layer is the number of the ink layer 2. The size is about μm, the barrier layer 3 is about 20 to 30 μm, and the adhesive layer 4 is about 1 to 2 mm.

When an adhesive is used, at least an adhesive coating step and a drying step are required, the number of manufacturing steps is increased, and the drying time in the drying step is required, so that the manufacturing efficiency is lowered.
On the other hand, in the present invention, an adhesive is used by providing a layer (ink layer 2 in FIG. 1) made of a plasticized vinyl chloride resin and a heat-weldable material between the vinyl chloride resin layer and the barrier layer. A barrier layer can be formed without any need.
Moreover, in the production of general flooring materials for stairs, a tread sheet made of vinyl chloride resin, a nose corner sheet, and a kick top sheet are each taken out by calendering, and these are integrally combined by heat welding, and then the nose corner. Since the part is bent, if the vinyl chloride resin layer and the barrier layer are laminated using the layer made of the heat-weldable material during these heat-welding steps, a new step can be performed. It is possible to provide a barrier layer without providing it.

The material of the pressure-sensitive adhesive layer may be appropriately selected from those that do not cause a problem in practical use in reducing the pressure-sensitive adhesive strength with time, but a material made of an acrylic independent foam that functions as a pressure-sensitive adhesive is particularly preferable. Examples of the commercially available product include double-sided adhesive tapes manufactured by 3M Ltd. (trade names: beta tapes # 5073 and # 5074).

As the barrier layer, a material that does not allow the plasticizer to pass through may be appropriately selected and used.
Examples thereof include metal vapor-deposited films having gas barrier properties (for example, aluminum-deposited polyethylene, aluminum-deposited polypropylene, etc.), metal non-deposited films having gas barrier properties (eg polyethylene (PE), polypropylene (PP), polyethylene terephthalate (PET), etc. Polybutylene terephthalate (PBT), etc.], ultraviolet curable urethane acrylate paint, heat curable urethane paint, etc., dioctyl phthalate, etc. can be mentioned.
Among the above, a PET resin film having a thickness of about 5 to 20 μm is preferable from the viewpoint of flexibility and handleability.

A layer capable of heat welding with the plasticized vinyl chloride resin is formed on the surface of the barrier layer in contact with the vinyl chloride resin layer. Examples of the forming method include a method of applying a coating film forming material. This makes it possible to maintain the adhesiveness between the vinyl chloride resin layer and the barrier layer without using an adhesive.
The coating material may be appropriately selected in consideration of adhesion to the barrier layer and heat welding property to the vinyl chloride resin layer, and may be polyurethane-based, vinyl chloride resin-based, vinyl acetate resin-based, chlorinated polypropylene-based, or acrylic. Examples thereof include resin-based and polyamide resin-based inks and paints. When a PET resin film is used as the barrier layer, an ink using a polyurethane-based medium (thermosetting solvent) is preferable.

Hereinafter, the present invention will be described in more detail with reference to Examples and Comparative Examples, but the present invention is not limited to these Examples.

Example 1
The tread sheet, the nose corner sheet, and the kick top sheet made of vinyl chloride resin were each put out by calender processing, and after being integrally combined by heat welding, the step nose corner portion was bent to prepare a floor material for stairs.
Separately, a 12 μm-thick PET film for the barrier layer (Toyobo Co., Ltd .: E5300) was coated with urethane ink (Dainichiseika Co., Ltd .: 175 L) on one side with a gravure printing machine to a thickness of 24 μm and dried. A PET film having an ink layer was produced.
Next, the surface of the PET film having the ink layer was heat-welded to the vertical attachment surface of the nose corner of the floor material for stairs with a thermal laminator.
Next, a beta tape made by 3M Ltd .: # 5074 was attached as an adhesive layer to the surface of the PET film (the surface opposite to the ink layer) to prepare the floor material for stairs of the present invention.

Example 2
The tread sheet, the nose corner sheet, and the kick top sheet made of vinyl chloride resin were each put out by calender processing, and after being integrally combined by heat welding, the step nose corner portion was bent to prepare a floor material for stairs.
Separately, urethane ink (175L manufactured by Dainichiseika Co., Ltd.) was applied to one side of an aluminum-deposited PET film for the barrier layer (Mitsui Chemicals Tocello Co., Ltd .: PETC12) with a gravure printing machine to a thickness of 24 μm and dried. , A PET film having an ink layer was produced.
Next, the surface of the PET film having the ink layer was heat-welded to the vertical attachment surface of the nose corner of the floor material for stairs with a thermal laminator.
Next, a beta tape made by 3M Ltd .: # 5074 was attached as an adhesive layer to the surface of the PET film (the surface opposite to the ink layer) to prepare the floor material for stairs of the present invention.

Example 3
The tread sheet, the nose corner sheet, and the kick top sheet made of vinyl chloride resin were each put out by calender processing, and after being integrally combined by heat welding, the step nose corner portion was bent to prepare a floor material for stairs.
Separately from this, urethane ink (manufactured by Jujo Chemical Co., Ltd .: AP) with a thickness of 24 μm is applied to one side of a 12 μm-thick PET film (manufactured by Toyobo Co., Ltd .: E5300) for the barrier layer with a gravure printing machine and dried. A PET film having a layer was produced.
Next, the surface of the PET film having the ink layer was heat-welded to the vertical attachment surface of the nose corner of the floor material for stairs with a thermal laminator.
Next, a beta tape made by 3M Ltd .: # 5074 was attached as an adhesive layer to the surface of the PET film (the surface opposite to the ink layer) to prepare the floor material for stairs of the present invention.

Comparative Example 1
A beta tape manufactured by 3M Ltd .: # 5074 is attached as an adhesive layer to the vertical attachment surface of the nose corner of the floor material for stairs produced in Example 1, and the stairs of Comparative Example 1 without a barrier layer. A flooring material was prepared.

Comparative Example 2
A 12 μm-thick PET film for the barrier layer (EP-171, manufactured by Cemedine Co., Ltd.) was used on the vertical attachment surface of the nose corner of the flooring material for stairs produced in Example 1. Made by Toyobo Co., Ltd .: E5300) was pasted and processed.
Next, a beta tape manufactured by 3M Ltd .: # 5074 was attached to the surface of the PET film as an adhesive layer to prepare a floor material for stairs of Comparative Example 2 having no ink layer.

Comparative Example 3
A 12 μm-thick aluminum-deposited PET film for the barrier layer using an adhesive (Toagosei Co., Ltd .: Aron Alpha) on the vertical attachment surface of the nose corner of the floor material for stairs produced in Example 1. (Mitsui Chemicals Toagosei Co., Ltd .: PETC12) was pasted and processed.
Next, a beta tape manufactured by 3M Ltd .: # 5074 was attached to the surface of the PET film as an adhesive layer to prepare a flooring material for stairs of Comparative Example 3 having no ink layer.

With respect to the flooring materials for stairs of Examples 1 to 3 and Comparative Examples 1 to 3, six months after the production, the corners of the nose were deformed, the adhesive strength of the adhesive tape was changed, and the adhesion between the vinyl chloride resin layer and the barrier layer was achieved. I checked. The results are shown in Table 1.

<Deformation of the corner of the nose>
The degree of deformation after 6 months was visually observed and evaluated according to the following criteria.
In addition, the deformation referred to here means that the lower end portion of the portion of the floor material for stairs provided with the adhesive layer is curved and turned up (in FIG. 1, the lower end portion is warped to the right). The middle part of the lower part floats).

〔criterion〕
◯: No deformation (when the curvature of the end is less than 1 mm)
X: Deformed (when the end is curved by 1 mm or more)

<Change in adhesive strength of adhesive tape>
The adhesive strength of the adhesive tape immediately after production and after 6 months has passed was measured using Toyo Seiki Co., Ltd .: Strogram R-1, and when the adhesive strength immediately after production was 100%, the adhesive strength after 6 months had passed. It was evaluated according to the following criteria according to the rate of decrease in force (%).

〔criterion〕
◯: Decrease rate is less than 30% Δ: Decrease rate is 30% or more and less than 50% ×: Decrease rate is 50% or more

<Adhesion between PVC resin layer and barrier layer>
The degree of peeling of the barrier layer after 6 months was visually observed and evaluated according to the following criteria.

〔criterion〕
◯: No peeling (when adhesion is maintained on the entire surface)
X: With peeling (when even a part is peeled)

1 Polychlorinated resin layer 2 Ink layer 3 Barrier layer 4 Adhesive layer 5 Tread surface 6 Kick top surface 7 Base

Claims (2)

In a flooring material for stairs in which an adhesive layer is provided on the vertical attachment surface of the corner of the nose, a barrier layer is provided between the polyvinyl chloride resin layer and the adhesive layer, and the barrier layer is formed. It is made of a metal vapor-deposited film having a gas barrier property or a non-metal metal-deposited film having a gas barrier property made of polyethylene, polypropylene, polyethylene terephthalate, or polybutylene terephthalate, and heat is applied to the surface of the barrier layer in contact with the polyvinyl chloride resin layer. a layer made of plasticized said polyvinyl chloride resin layer and the heat-weldable material during welding, the heat weldable material, stair flooring which is a ink polyurethane. The floor material for stairs according to claim 1, wherein the adhesive layer is made of an acrylic independent foam that functions as a pressure-sensitive adhesive.

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