JP2022039502A - Anti-slip curing sheet - Google Patents

Abstract

To provide an anti-slip curing sheet that enables floor protection at construction sites and not only has excellent anti-slip properties when dry, but also maintains anti-slip properties even when wet or frosted at low temperatures.SOLUTION: There is provided an anti-slip curing sheet in which an adhesive layer and a polyolefin resin film are laminated. The surface opposite to the surface on the adhesive layer side of the polyolefin resin film has an uneven surface on which a convex portion is formed. The polyolefin resin film contains 9 to 50 mass% of high-density polyethylene and contains 50 to 91 mass% of linear low-density polyethylene, and has a tensile elastic modulus of 92 to 600 MPa.SELECTED DRAWING: Figure 1

Description

The present invention relates to a curing sheet, and more particularly to a non-slip anti-slip curing sheet for floors used at the time of construction and the like.

Generally, in order to prevent the floor and walls from being soiled or damaged during various construction work during the construction site, for example, during the construction period until it rains by the two-by-four construction method, a curing sheet is used to protect them. Is used.

As a curing sheet, the applicant has formed a large number of irregularities on the surface of the synthetic resin sheet, and the entire back surface is coated with an acrylic resin adhesive that does not remain on the floor panel surface when the sheet is peeled off. A non-slip curing sheet for protecting the floor panel surface (Patent Document 1), a synthetic resin sheet, an adhesive layer formed on one side of the synthetic resin sheet, and a release material bonded on the adhesive layer are provided. We are proposing a curing sheet (Patent Document 2).

Further, in Patent Document 3, in a sheet-like material provided with an adhesive layer on the back surface of the synthetic resin film, a synthetic resin film strip having a width of 1 to 10 cm is formed at least at one end along the length direction of the surface of the synthetic resin film. We are proposing a floor protection sheet with synthetic resin film uneven parts on the flat part and all other parts.

However, even if these curing sheets are used, in cold regions, frost and sleet may form on the surface of the curing sheet in winter, causing fine ice-mixed water to collect on the surface of the curing sheet. There was a problem that it became very slippery and hindered the construction work.

Utility Model Registration No. 2599811 Utility Model Registration No. 2585687 Gazette Japanese Unexamined Patent Publication No. 8-319723

The present invention has been made in view of the above problems, and an object thereof is to enable floor surface protection at a construction site, have excellent anti-slip properties when dried, and when wet at a low temperature. It provides an anti-slip curing sheet that can maintain anti-slip properties even during frost and frost.

That is, the present invention has an uneven surface in which a pressure-sensitive adhesive layer and a polyethylene-based resin film are laminated, and a convex portion is formed on a surface opposite to the surface of the polyolefin-based resin film on the pressure-sensitive adhesive layer side. The resin film is an anti-slip curing sheet containing 9 to 50% by mass of high-density polyethylene, 50 to 91% by mass of linear low-density polyethylene, and a tensile elasticity of 92 to 600 MPa.

Further, it is preferable that the angle formed by the convex portion between the wall surface of the convex portion and the upper surface of the convex portion is 90 ° to 170 °, and the height of the convex portion is 0.08 to 0.3 mm.

Further, it is preferable that the convex portion has a distance between the convex portions of 0.01 to 0.8 mm.

According to the present invention, an anti-slip curing sheet that enables floor protection at a construction site, has excellent anti-slip properties when dried, and can maintain anti-slip properties even when wet or frosted at low temperatures. Can be provided.

It is a schematic cross-sectional view which shows an example of the structure of the anti-slip curing sheet of this invention. It is a schematic front view which shows an example of the anti-slip curing sheet of this invention. It is a schematic cross-sectional view explaining the polyolefin resin film of the anti-slip curing sheet of this invention.

Hereinafter, the anti-slip curing sheet of the present invention will be described with reference to the drawings. In the drawings, a plurality of layers and irregularities constituting the anti-slip curing sheet of the present invention are shown, but the thickness and the size of the irregularities of each layer are appropriately changed for ease of explanation, and actual anti-slip. It does not accurately reflect the thickness of each layer and the size relationship (scale) of unevenness in the sex curing sheet.

As illustrated in FIG. 1, the anti-slip curing sheet 1 of the present invention has a polyolefin-based resin film 2 having an uneven surface having a convex portion 4 formed on the surface thereof and a surface opposite to the uneven surface of the polyolefin-based resin film. It is composed of the adhesive layer 3 formed in the above.

The polyolefin-based resin film 2 used in the anti-slip curing sheet of the present invention contains 9 to 50% by mass of high-density polyethylene (hereinafter, also referred to as HDPE) and is linear low-density polyethylene (hereinafter, LLDPE). Also referred to as) is contained in an amount of 50 to 91% by mass. It preferably contains 15-40% by mass of high density polyethylene (HDPE). Further, it is preferable to contain 60 to 85% by mass of linear low density polyethylene (LLDPE). By blending linear low-density polyethylene (LLDPE) and high-density polyethylene (HDPE) in specific amounts, the film does not tear or remain during construction or peeling, and anti-slip properties can be obtained even at low temperatures. The polyolefin-based resin film 2 can contain known additives, for example, fillers such as inorganic fillers and organic fillers, colorants such as pigments and dyes, antiaging agents, antistatic agents, and release agents. Examples thereof include mold agents, antioxidants, ultraviolet absorbers, lightfasteners, and crystal nucleating agents.

The tensile elastic modulus of the anti-slip curing sheet 1 of the present invention is 92 to 600 MPa, preferably 100 to 500 MPa. If the tensile elastic modulus is 92 to 600 MPa in both the vertical and horizontal directions, it has elasticity that does not easily collapse even if the construction worker repeatedly steps on the unevenness of the anti-slip curing sheet surface, and it is appropriate even if the film cools in a low temperature environment. Since it is hard, it has excellent anti-slip properties, and it is possible to prevent the film from tearing or remaining during construction or peeling. The longitudinal direction of the anti-slip curing sheet wound in a roll shape is called the vertical direction.

In the anti-slip curing sheet 1 of the present invention, the adhesive layer 3 and the polyolefin-based resin film 2 are laminated, and an uneven surface on which a convex portion is formed is formed on the opposite surface of the surface of the polyolefin-based resin film 2 on the adhesive layer side. However, as shown in FIG. 1, the convex portion 4 may be formed on both surfaces of the polyolefin-based resin film 2, and the convex portion 4 is not formed on the surface on which the adhesive layer 3 is laminated. , The convex portion may be formed only on the surface opposite to the surface on which the adhesive layer 3 is laminated. Since the adhesive area with the adhesive layer 3 increases and the surface of the polyolefin resin film 2 and the adhesive layer 3 is difficult to peel off, the convex portion 4 is also formed on the surface of the polyolefin resin film 2 on the adhesive layer 3 side. Is preferable.

FIG. 2 illustrates a front view of the anti-slip curing sheet 1 of the present invention as viewed from the polyolefin-based resin film side. Since the convex portion 4 is formed over the entire uneven surface 2a of the polyolefin resin film 2, it has excellent anti-slip properties, and the effect that the anti-slip properties are not lost even when wet or frosted in a low temperature environment. Is playing.

The shape of the convex portion 4 of the polyolefin resin film 2 is not particularly limited, and is, for example, a polygon such as a triangle, a quadrangle, a pentagon, or a hexagon, a silk grain, a lattice, a satin finish, a linen grain, a skin grain, a straight line, and the like. Curves, dotted lines, circles, and ellipses can be mentioned, and a pattern in which two or more types are combined may be used. Of these, polygons are preferable in terms of anti-slip properties, and equilateral triangles and squares are more preferable. When the shape is a polygon, if the lengths of the adjacent sides of the polygon are substantially the same, the direction of slip is difficult to form and the anti-slip effect can be obtained. FIG. 2 illustrates a form in which the sides of the square are parallel to the length direction, but it does not have to be parallel.
The length of one side of the polygon is preferably 0.05 to 0.4 mm, more preferably 0.05 to 0.3 mm, and 0.05 to 0 in terms of anti-slip property and durability of the convex portion. .2 mm is more preferred.

FIG. 3 shows a cross-sectional view of an example of the convex portion 4. The distance L between the protrusions 4 is preferably 0.01 to 0.8 mm, more preferably 0.01 to 0.4 mm, still more preferably 0.01 to 0.1 mm in terms of anti-slip property and manufacturing cost. The angle Θ of the convex portion 4 is preferably formed at 90 ° to 170 °, more preferably 90 ° to 165 °, and 90 ° to 160 ° in terms of anti-slip property and difficulty in manufacturing. More preferred. The height H of the convex portion 4 is preferably formed to be 0.08 to 0.3 mm, more preferably 0.08 to 0.25 mm, and 0, in terms of anti-slip property and durability of the convex portion. .08 to 0.2 mm is more preferable.

It is preferable that the surface 2b on which the adhesive layer 3 of the polyolefin resin film 2 is laminated is surface-modified by corona treatment in advance in order to improve the adhesiveness with the adhesive resin.

Examples of the method for producing the polyolefin-based resin film 2 include a method for producing the polyolefin-based resin film 2 by a known production method such as an inflation method, a T-die method, or a casting method. Further, as a method of forming the unevenness, there are a method of performing heat embossing after extrusion molding and a method of performing embossing at the same time as extrusion molding using a cooling roll provided with unevenness at the time of extrusion molding.

Further, the adhesive resin used for the adhesive layer 3 of the present invention has good adhesion to plywood and the like, is less deteriorated by ultraviolet rays, does not peel off even in a wet state, maintains adhesiveness, and has re-peelability. Is good.
Examples of the adhesive resin include polyolefin-based, polyacrylic-based, polyurethane-based, polyester-based, silicone-based, natural rubber-based, and synthetic rubber-based, and in particular, polyacrylic-based resin has performance adjustments such as adhesiveness and removability. It is easy to use, it is easy to mix with additives, and it has good processability, so it can be suitably used.

The coating amount of the adhesive resin is preferably 5 to 30 g / m ² . When it is 5 g / m ² or more, sufficient adhesive strength is easily obtained, and when it is 30 g / m ² or less, the adhesive resin is unlikely to remain on the curing object when the sheet is peeled off after curing.

Further, the coating pattern of the adhesive resin in the adhesive layer is not limited to the coating on the entire surface of the sheet, and may be a coating pattern formed by a discontinuous non-coated portion and a continuous coated portion. In order to ensure sufficient adhesiveness in an outdoor exposure environment, the coating area is preferably 80% or more of the entire sheet. Further, if the non-applied portion is continuous, the gap becomes a passage for water, so that the non-applied portion is preferable.

As a method for applying the adhesive resin, known methods such as a transfer method, a knife coating method, a gravure roll coating method, a roll coating method, a flexographic coating method, and a spray spray coating method can be used.

The adhesive strength of the adhesive layer surface of the curing sheet is JIS Z0237 10.4.1 Method 1: SUS plate adhesive strength measured using a 25 mm wide test piece according to the 180 ° peeling adhesive strength to the stainless steel test plate. Is preferably 1.0 to 10 N / 25 mm, and more preferably 1.0 to 8.0 N / 25 mm. If the adhesive strength with the SUS plate is 1.0 N / 25 mm or more, it will not easily peel off from the plywood when it is cured, and if it is 10 N / 25 mm or less, the surface of the plywood will be peeled off from the plywood. Damage such as fluffing and tearing of the sheet itself are unlikely to occur.

Further, the anti-slip curing sheet 1 of the present invention preferably has transparency. If it has transparency, the characters indicating the positions of the pillars written on the floor surface of the adherend can be visually recognized, so that the construction work is easy.

The anti-slip curing sheet of the present invention will be specifically described with reference to Examples and Comparative Examples described below, but the present invention is not limited thereto. The evaluation in Examples and Comparative Examples was performed by the following method.

<Adhesive strength of the curing sheet>
JIS Z0237 10.4.1 Method 1: Measured according to the 180 ° peeling adhesive strength to the stainless steel test plate. The width of the test piece was 25 mm.

<Tension elastic modulus of the curing sheet>
The elastic modulus in the vertical direction and the horizontal direction was measured according to the method specified in JIS K7161 10.3.2 (Inclination obtained from two elastic moduli).
Measurement conditions: test piece width 10 mm, chuck distance 75 mm, tensile speed 1 mm / min

<Anti-slip property when the curing sheet dries>
A curing sheet is attached to plywood (JAS structural plywood Hayashi Veneer Sangyo Co., Ltd. Taiga Ply), and a worker (weight 70 kg) puts his weight on the sheet and rubs it forward as if pressing it with work shoes. It was evaluated by the evaluation criteria.
Evaluation criteria 〇: Almost no slip △: Slightly slip ×: Slip

<Anti-slip property when the curing sheet is wet or frosted>
A curing sheet is attached to the same plywood as the anti-slip property evaluation during drying, and ice (about 1 to 10 mm in size) finely ground with an ice shaving machine (Swan SI-3B manufactured by Ikenaga Iron Works Co., Ltd.) is placed on it. .7 kg / m ² was put on it, and the weight was put on the ice and rubbed forward as if pressing it with work shoes, and the evaluation was made according to the following evaluation criteria.
Evaluation criteria 〇: Almost no slip △: Slightly slip ×: Slip

[Example 1]
As a polyolefin resin film, polyethylene film (manufactured by Ichiji Hayashi Co., Ltd., LLDPE 70%, HDPE 30%, embossing during extrusion molding by T-die method, translucent, convex shape: quadrangle (square with a side length of 0.08 mm) ), Distance between convex portions: 0.02 mm, convex portion angle: 150 °, convex portion height: 0.1 mm, single-sided corona treatment) was used. A polyacrylic adhesive resin was applied to the corona-treated surface by a transfer method so that the dry coating amount was 14 g / m ² , and a curing sheet as shown in FIG. 1 was obtained. As for the polyacrylic adhesive resin, the cross-linking agent (B-45 manufactured by Lion Special Chemicals Co., Ltd.) is 0 with respect to 100 parts by weight of the polyacrylic adhesive resin (AS-1107 manufactured by Lion Special Chemicals Co., Ltd.). .5 parts by weight was added. This curing sheet was used and evaluated by the above-mentioned method. The evaluation results are shown in Table 1.

[Example 2]
As a polyolefin resin film, polyethylene film (manufactured by Ichiji Hayashi Co., Ltd., LLDPE 90%, HDPE 10%, embossing during extrusion molding by T-die method, translucent, convex shape: quadrangle (square with a side length of 0.08 mm) ), Distance between convex portions: 0.02 mm, convex portion angle: 142 °, convex portion height: 0.1 mm, single-sided corona treatment), a curing sheet was obtained in the same manner as in Example 1. Table 1 shows the evaluation results of the curing sheet.
[Example 3]
As a polyolefin resin film, polyethylene film (manufactured by Hayashikazuji Co., Ltd., LLDPE 70%, HDPE 30%, embossing during extrusion molding by T-die method, translucent, convex shape: circular (diameter 0.5 mm), distance between convex parts A curing sheet was obtained in the same manner as in Example 1 except that (1.0 mm, convex angle: 165 °, convex height: 0.05 mm, single-sided corona treatment) was used. Table 1 shows the evaluation results of the curing sheet.

[Comparative Example 1]
As a polyolefin resin film, polyethylene film (manufactured by Hayashi Ichiji Co., Ltd., LLDPE 100%, embossing during extrusion molding by T-die method, translucent, convex shape: lattice (concave shape is square (1 side length 2 mm)) , Distance between convex parts: 3.7 mm, convex part angle: 174 °, convex part height: 0.05 mm, single-sided corona treatment), and a polyacrylic adhesive resin (Saiden Chemical) was applied to the corona-treated surface by a transfer method. ATR-1 manufactured by ATR-1 Co., Ltd. added 0.3 parts by weight of M-2 cross-linking agent manufactured by Saiden Chemical Co., Ltd. to 100 parts by weight) was applied so that the dry coating amount was 20 g / m ² . Got Table 1 shows the evaluation results of the curing sheet.

表１に示すように、実施例の養生シートは、乾燥時の防滑性も湿潤時や降霜時の防滑性も良好であり、特に実施例１と実施例２の養生シートは、乾燥時の防滑性も湿潤時や降霜時の防滑性も共に優れていた。

As shown in Table 1, the curing sheets of Examples have good anti-slip properties during drying and anti-slip properties during wetness and frost, and in particular, the curing sheets of Examples 1 and 2 have anti-slip properties during drying. It was excellent in both wetness and anti-slip properties during frost.

Further, as shown in Table 1, the curing sheet of the comparative example was excellent in anti-slip property at the time of drying as in the curing sheet according to the example, but the result was that the anti-slip property at the time of wetting or frost was poor. ..

1 Anti-slip curing sheet 2 Polyolefin resin film 2a Concavo-convex surface 2b Concavo-convex surface 3 Adhesive layer 4 Convex part

Claims (3)

The adhesive layer and the polyolefin resin film are laminated,
The surface opposite to the surface on the adhesive layer side of the polyolefin-based resin film has an uneven surface on which a convex portion is formed.
The polyolefin-based resin film contains 9 to 50% by mass of high-density polyethylene and 50 to 91% by mass of linear low-density polyethylene.
Anti-slip curing sheet with a tensile elastic modulus of 92 to 600 MPa. The first aspect of the present invention, wherein the convex portion has an angle formed by the wall surface of the convex portion and the upper surface of the convex portion of 90 ° to 170 °, and the height of the convex portion is 0.08 to 0.3 mm. Anti-slip curing sheet. The anti-slip curing sheet according to claim 1 or 2, wherein the convex portions have a distance between the convex portions of 0.01 to 0.8 mm.

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