JPH10158605A - Pressure-sensitive adhesive sheet for protecting building floor surface - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an inexpensive easily producible pressure-sensitive adhesive tape which is applied to the scaffold of a building site, can contribute to the safety and efficiency of a work, is ready for the drainage of e.g. rainwater and has excellent antislip effect. SOLUTION: This sheet is prepared by laminating a pressure-sensitive adhesive layer on the back of a support on which many embosses are formed to form parallel lines. The support is an unoriented film of a polyolefin resin. The height of each of the embosses formed on the surface of the support is 20-500μm, and the distance between adjoining embosses is 0.4-10mm. The thickness of the support coinciding with the groove and being the thinnest is 10-100μm, and the thickness of the pressure-sensitive adhesive layer laminated on the back of the support is 25μm or above.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a pressure-sensitive adhesive sheet, and more particularly, to a pressure-sensitive adhesive sheet which can be suitably used as a curing film for a building for the purpose of protecting floors and the like under construction from the weather.

[0002]

2. Description of the Related Art Regardless of a detached house or an apartment house, the lower floor surface or the like is exposed to the wind and rain until the roofing work of a wooden building is completed. During this period, although the construction period has been shortened recently due to the spread of prefabricated construction methods such as the 2 × 4 construction method, it is extremely difficult to complete roofing work without exposure to wind and rain during the construction period. It is rare. Therefore, in order to protect the lower floor and the like, these surfaces are covered with a waterproof sheet such as a polyethylene film or a polyethylene film reinforced with a drawn yarn, and the joints are fixed with an adhesive tape or a nail. These waterproof sheets have been used or covered with an adhesive sheet that has been subjected to an adhesive treatment.

[0003] In general, these waterproof sheets have a smooth surface in many cases, and even if the surface has some unevenness, it becomes slippery when rainwater is applied to a floor surface or the like, and it can be used as a scaffold in a place wet with rainwater. It is extremely dangerous to work with it. Therefore, the construction worker has to check the wetness of the floor surface and the like before the work, and when the work is wet with rainwater or the like, it is necessary to wipe the rainwater or the like with a rag or the like.

As an attempt to eliminate unnecessary work of the waterproof sheet, for example, Japanese Unexamined Patent Publication (Kokai) No. 62-53389 discloses a biaxially stretched plastic film, a polyolefin resin layer, a uniaxial sheet having a tear property in the transverse direction. An adhesive tape is disclosed in which an adhesive layer is provided on one surface of a laminated tape obtained by sequentially laminating a biaxially stretched plastic net and a polyolefin resin layer.

The adhesive tape disclosed in Japanese Patent Application Laid-Open No. 62-53389 uses a biaxially stretched plastic film or a uniaxial or biaxially stretched plastic net having easy tearing properties in the transverse direction. However, in order to obtain the strength of the pressure-sensitive adhesive tape at a construction work site under considerably severe use conditions, these biaxially stretched plastic films or uniaxial or biaxially stretched plastic nets having easy tearability in the transverse direction can be obtained by polyolefin. A wide variety of constituent materials are required, such as the necessity of strengthening waterproofing and impact resistance by combining two resin layers, which requires a large number of man-hours for laminating and joining these, resulting in high product costs. It is something that makes it easy.

[0006]

SUMMARY OF THE INVENTION The present invention has been made in view of the above facts, and has as its object to be laid on a scaffold of a construction work site, thereby contributing to work safety and efficiency. It is an object of the present invention to provide an inexpensive pressure-sensitive adhesive sheet that can be easily drained such as rainwater, has an excellent anti-slip effect, and can be easily manufactured.

[0007]

The present invention relates to a pressure-sensitive adhesive sheet for building floor protection, comprising a pressure-sensitive adhesive layer laminated on the back of a substrate provided with a large number of linear embossments in parallel,
The substrate is made of a film that has not been subjected to a stretching treatment of a polyolefin-based resin, the height of the emboss provided on the surface of the substrate is 20 to 500 μm, and the distance between adjacent embosses is 0.4 to 10 mm, The thickness of the base material of the thin groove portion is 10 to 100 μm, and the thickness of the pressure-sensitive adhesive layer laminated on the back surface of the base material is 25 μm or more. This is the gist.

The polyolefin resin used as the base material in the present invention is not particularly limited. For example, a polymer obtained by a high pressure method or a Ziegler-Natta catalyst or a metallocene catalyst may be used alone or in combination under low pressure conditions. Examples of the obtained polymer include low-density polyethylene, medium-density polyethylene, high-density polyethylene, linear low-density polyethylene, ethylene-α-olefin copolymer, and polypropylene. Each of these thermoplastic resins may be used alone, or two or more of them may be used in combination. If necessary, an ultraviolet absorber, an antioxidant, a colorant, and the like may be added to the polyolefin resin used as a base material.

The substrate formed from the polyolefin resin is subjected to a special stretching treatment except for the flow orientation at the time of molding and, if necessary, the flow orientation added to the film at the time of embossing applied to the film. must not. This is because the stretching treatment improves the mechanical strength of the film, but lowers the weather resistance and is not preferable as a material for architectural curing used outdoors.

In the present invention, the embossing provided on the substrate is a large number of straight embosses in parallel. If the emboss is not linear or does not have parallel grooves, drainage after rain is not performed quickly and stable anti-slip properties are hardly imparted. The parallel large number of linear embosses does not particularly limit the direction, for example,
They may be provided parallel or orthogonal to the length direction of the substrate, or may be provided at an angle to them.

On the other hand, if the height of the emboss is less than 20 μm, the rainwater wets the top of the emboss, and it is difficult to provide a stable anti-slip property. If the height exceeds 500 μm, the rainwater passage expands and the wet area increases. Also, it is difficult to provide stable anti-slip properties. Also, the distance between adjacent embosses is 0.
If it is less than 4 mm, drainage after rainfall will not be performed promptly, and if it exceeds 10 mm, walking will be poor. If the thickness of the groove, which is the thinnest portion of the base material, is less than 10 μm, the mechanical strength is not sufficient and the durability is poor. In addition, the handling becomes difficult. Handling becomes difficult.

In the present invention, the pressure-sensitive adhesive laminated on the back surface of the substrate is not particularly limited as long as it does not cause soiling of the floor surface or the like to be bonded. And hot-melt type pressure-sensitive adhesive, for example, acrylic pressure-sensitive adhesive, E
Examples thereof include olefin-based adhesives such as VA, ethylene-ethyl acrylate copolymer, polybutadiene, ethylene-α-olefin copolymer, and styrene-butadiene copolymer, and rubber-based adhesives.

The pressure-sensitive adhesive layer has a thickness of 25 μm or more, preferably 25 to 100 μm. If the thickness of the pressure-sensitive adhesive layer is less than 25 μm, sufficient adhesive strength to a concrete surface to be adhered or a floor surface with many irregularities cannot be obtained, and work safety is impaired due to slippage or the like.

The pressure-sensitive adhesive sheet of the present invention is used by attaching a plurality of parallel drainage channels provided by a plurality of linear embosses to a floor or the like in accordance with the direction of drainage. When the drainage channel is long, the linear embossing uses a pressure-sensitive adhesive sheet provided in the length direction of the pressure-sensitive adhesive sheet, and covers a wide space by partially overlapping both side ends and connecting in the width direction. Alternatively, if the drainage channel is short, a drainage channel is formed by partially overlapping both sides of each other like a clapboard and connecting in the width direction so that the drainage channel is connected back and forth. Is also good. The method of use is not limited to the above, and an adhesive sheet having appropriate specifications according to the situation may be used by a method that facilitates drainage.

Since the pressure-sensitive adhesive sheet of the present invention is configured as described above, the rainwater droplet wet area is limited to the concave portion of the emboss, the drainage of the convex portion is performed very quickly, and the shortest Since the water is drained through the drainage channel, the building work can be safely performed immediately if the rain comes up without wiping the rainwater with a rag or the like. Further, since the base material constituting the pressure-sensitive adhesive sheet is made of a film that has not been subjected to a stretching treatment, the base material has an appropriate frictional force, and furthermore, the embossing improves the walking property, so that it can be used comfortably. It gives a feeling, and can be used with peace of mind due to its excellent weather resistance even in long-term use.

Further, even if the pressure-sensitive adhesive layer of the pressure-sensitive adhesive sheet has a rough surface such as a concrete surface and a small amount of dust such as sawdust,
With sufficient adhesive strength, it adheres firmly to the adherend surface,
It is easy to cover floors and the like and form drainage channels, and can sufficiently protect the adhered surface from rainwater and other contamination.

[0017]

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, the present invention will be described specifically with reference to examples, but the present invention is not limited to these examples.

(Examples 1 and 2) As a base material, low-density polyethylene (trade name "Mirason 1" manufactured by Mitsui Petrochemical Industries, Ltd.)
2)) was extruded into a film having a thickness of 100 μm by an inflation method, and the surface of the film was embossed as shown in Table 1 using an emboss roll to form a substrate. Next, after the back surface of the base material is subjected to corona discharge treatment, an acrylic pressure-sensitive adhesive composed of 80 parts by weight of butyl acrylate and 20 parts by weight of 2-ethylhexyl acrylate is applied so that the thickness after drying becomes 25 μm,
An adhesive sheet was produced.

(Comparative Examples 1 and 2) The substrate of Example 1 was replaced with
An adhesive sheet was produced in the same manner as in Example 1 except that the above-mentioned low-density polyethylene film without emboss was used and the thickness of the adhesive layer was as shown in Table 1.

In order to evaluate the performance of the pressure-sensitive adhesive sheets obtained in the examples and comparative examples, each pressure-sensitive adhesive sheet was evaluated as an actual 2 × 4.
It was laid on the first floor of a house construction site by the construction method, and drainage and slipperiness were evaluated by the following methods. The evaluation results are shown in Table 1. 1. Water drainage: The water drainability is determined by a sensory test of three workers who are skilled in the work. ○: Process of normal work just by sweeping the water from the puddle formed in the depression at the construction site out of the work area with a broom X: The work could be performed only by sweeping the water from the puddle out of the work area with a broom and the feet could not be slipped, and the work could only be performed by wiping the entire surface with a rag. The pressure-sensitive adhesive sheet of Comparative Example 2 could not be evaluated because it could not be fixed to the floor due to insufficient adhesive strength.

2. Slippery: Similar to the preceding paragraph, the sensory test of three workers determined the slipperiness of the adhesive sheet surface in fine weather (dry state) and cloudy weather (state in which the base material surface of the adhesive sheet was exposed) according to a sensory test of three workers. Normal work could be performed without any concern for the adhesive sheet at the feet. △: Normal work could be performed anyway, although the adhesive sheet at the feet slightly slipped. ×: Work efficiency improved due to the adhesive sheet at the feet slipped. Was evaluated in two stages.

The pressure-sensitive adhesive strength (g / 25 mm) of the obtained pressure-sensitive adhesive sheet to plywood was measured by a conventional method and is shown in Table 1.

[0023]

[Table 1]

[0024]

Since the pressure-sensitive adhesive sheet of the present invention is constructed as described above, drainage is performed very quickly, and
If the rain rises, construction work can be performed immediately and safely without wiping rainwater, especially with a rag or the like. In addition, even if there is a rough surface such as a concrete surface or a small amount of sawdust or other dust, the pressure-sensitive adhesive sheet is firmly adhered to the adhered surface with a sufficient adhesive force, and the surface has a moderate friction. The embossing has a strong force and further enhances the walking properties, so that it gives a comfortable feeling of use. It can be sufficiently protected from.

Claims (1)

[Claims] 1. A pressure-sensitive adhesive sheet for building floor protection comprising a pressure-sensitive adhesive layer laminated on the back surface of a base material provided with a large number of linear embosses in parallel, wherein the base material is a polyolefin resin. It is made of a film that has not been stretched, and the height of the emboss provided on the surface of the base material is 20 to 50.
0 μm, the distance between adjacent embosses is 0.4 to 10 mm,
The thickness of the thinnest groove base material is 10 to 100 μm, and the thickness of the pressure-sensitive adhesive layer laminated on the back surface of the base material is 2 μm.
An adhesive sheet for protecting a building floor, which is at least 5 μm.