JP4925694B2 - Floor surface protection and anti-slip sheet in building site, and floor surface protection and anti-slip method using the same - Google Patents

Description

  More particularly, the present invention relates to a floor material protection and anti-slip sheet for a building site that can be applied simply, quickly and reliably, and a floor surface protection and anti-slip method using the same. It is.

  As is well known, it is necessary to protect the floors and walls so that they are not soiled or scratched during various construction operations until it is rained at the construction site, for example, two-by-four method. .

  Conventionally, as such protection means, a method of laying and protecting a hard plate such as a veneer plate on a floor surface is used (for example, see Patent Document 1).

  However, in the protection method using such a curing material, since the curing material itself is hard, the floor surface may be damaged by dropping or friction. In addition, the surface easily slips, and the operator may accidentally slip and fall down, resulting in the risk of causing floor damage or injury to the operator himself.

Furthermore, the curing material is bulky and is not easy to use such as transportation and handling. In recent years, it is necessary to perform the working time as quickly as possible due to the cost reduction due to the shortening of the construction period. Although the use of materials is required, it may be directly against this desire.
JP 2001-152673 A (page 3-5, FIG. 1)

  The present invention has been made in view of the above problems, and its object is to provide a floor protection and anti-slip sheet for a building site that can be applied simply, quickly and reliably. And a floor surface protection and anti-slip method using the same.

  Means employed by the present inventor for solving the above-described problems will be described with reference to the accompanying drawings.

That is, the present invention is a stretched foam sheet material 1 in which a synthetic material in which a foaming agent A is mixed into a molten plastic P is extruded from a die of an extruder into a thin film and stretched uniaxially or biaxially. ,
While the foaming agent A is foamed, the long bubble irregularities 11 are formed in the extrusion direction or the width direction of the sheet surface, while the adhesive layer 12 is provided on the other surface,
The bubbles in the long bubble irregularities 11 on the surface of the stretched foam sheet material 1 are closed cells, and the ratio of the major axis to the minor axis of the long bubble is in the range of 3 to 15 ,
The long bubble irregularities 11 provide buffering protection against impacts on the floor surface from the sheet, and the use of technical means to prevent slipping on the sheet surface, thereby protecting flooring and anti-slip sheets on the construction site. Completed.

  Furthermore, in order to solve the above-described problems, the present invention employs technical means of extruding into a thin film from a die having a thickness of 0.05 to 1 mm in an extrusion molding machine in addition to the above means as necessary. .

  Furthermore, in order to solve the above-mentioned problems, the present invention provides a corona treatment, a plasma treatment, a flame treatment, a UV treatment, a primer treatment on the adhesive layer 12 of the stretched foam sheet material 1 in addition to the above means as necessary. The technical means of improving the adhesion by applying at least one of the above was adopted.

  Furthermore, in order to solve the above-mentioned problems, the present invention employs a technical means in which 30% or more of linear low density polyethylene is mixed into the molten plastic P in addition to the above means as necessary.

  Furthermore, in order to solve the above-mentioned problems, the present invention provides a technical means for adding a foaming agent A to the molten plastic P in addition to the above-described means as necessary, and increasing the expansion ratio from 1 to 30 times. It was adopted.

In the present invention, the synthetic material in which the foaming agent A is mixed into the molten plastic P is extruded from the die of the extruder into a thin film, and the sheet body is stretched uniaxially or biaxially and then cooled.
By foaming the foaming agent A, a long bubble concavo-convex portion 11 is formed in the extrusion direction or the width direction of the sheet surface, the bubbles in the long bubble concavo-convex portion 11 are made into independent bubbles, and the long diameter of the long bubble is While the ratio to the minor axis is in the range of 3-15 ,
A stretched foam sheet material 1 is prepared by providing an adhesive material layer 12 on the other surface, and the stretched foam sheet material 1 is wound in a roll shape with the adhesive material layer 12 facing outside,
Unwinding the stretched foam sheet material 1 on the target floor surface F at the building site, laying the outer adhesive material layer 12 while abutting and sticking to the target floor surface F,
By adopting technical means for buffering and protecting the impact from the sheet surface to the floor surface by the long bubble irregularities 11 on the surface of the stretched foam sheet material 1, by adopting technical means to prevent the slip on the sheet surface. Completed floor protection and anti-slip method.

  According to the present invention, a synthetic material in which a foaming agent is mixed into a molten plastic is extruded from a die of an extruder into a thin film and stretched in a uniaxial to biaxial manner to form a long bubble uneven portion on the sheet surface, Since the stretched foam sheet material was prepared by providing an adhesive material layer on the other surface, buffer protection and anti-slip effects could be obtained by the long bubble irregularities on the surface of the stretched foam sheet material.

  In addition, the expanded foamed sheet material is wound in a roll shape with the adhesive layer side facing outward, and the expanded foamed sheet material is unraveled on the target floor surface at the construction site, and the adhesive material layer is By laying while abutting and sticking to the target floor surface, the long foam irregularities on the surface of the stretched foam sheet material buffer and protect the impact from the sheet surface to the floor surface, and effect slip on the sheet surface Can be prevented.

  By winding the stretched foam sheet into a roll shape, it is not bulky during transportation, and by reducing the contact area of the back surface of the roll wound by this uneven portion by the long bubble uneven portion formed on the surface, Since the peel strength is reduced and it becomes difficult to tie up at the time of unraveling, it is possible to perform a quick and easy operation, and it is very convenient and can improve the workability.

  Furthermore, the effect of the adhesive material layer being in contact with and affixed to the target floor surface and the uneven portion formed on the surface being the upper surface is obtained by laying the sheet of the present invention. Thus, since it can exhibit an excellent anti-slip effect, it is possible to improve the safety and workability of the construction site, and the practical utility value is very high.

  BEST MODE FOR CARRYING OUT THE INVENTION The best mode for carrying out the present invention will be described in more detail with reference to the drawings specifically shown as follows.

  An embodiment of the present invention will be described with reference to FIGS. In the figure, what is indicated by reference numeral 1 is a stretched foam sheet material, and this stretched foam sheet material 1 is produced as follows.

  First, a foaming agent A is mixed into the molten plastic P to produce a synthetic material. In the present embodiment, low density polyethylene (LDPE) is employed as the plastic P that is a material used.

  At this time, if necessary, 30% or more of linear low density polyethylene (L-LDPE) is mixed into the molten plastic P so that the film is not torn or remains at the time of construction or peeling. , Tensile strength can be improved. Specifically, both MD: Machine-Direction (vertical direction) and TD: Transverse-Direction (horizontal direction) require 3 N / cm or more, and in particular, MD requires 10 N / cm or more.

Further, as the foaming agent A, a chemical foaming agent such as baking soda, citric acid, ADCA (azodicarbonamide), OBSH (oxybisbenzenesulfonyl hydrazide), or a physical foaming agent such as CO ₂ , N ₂ , or alternative chlorofluorocarbon is used. Can be adopted.

  In this embodiment, an inflation molding method is adopted, and this synthetic material is supplied from a hopper of a known extrusion molding machine and extruded from a die provided at the tip into a thin film. At this time, the die is a circular die and has a thickness of 0.05 to 1 mm.

  Next, the extruded cylindrical extruded body is biaxially stretched and then cooled. As this cooling method, a conventional air-cooling type or water-cooling type can be adopted. Then, both ends of the biaxially stretched bag-like sheet are cut to be divided into two sheets (see FIG. 1).

  Thereafter, the foaming agent A is foamed to form the long bubble irregularities 11 on the sheet surface (see FIGS. 2 and 3). In the present embodiment, the bubbles in the long bubble concavo-convex portion 11 are closed cells, and the aspect ratio (ratio between the long diameter and the short diameter of the long bubbles) is 1 to 30 (more preferably 3 to 15). It is preferable to make it into a range. If it is too small, the cutting workability is deteriorated. On the other hand, if it is too large, the physical properties of the film are lowered, and the strength that can withstand use cannot be obtained.

  In the case of inflation molding as described above, by increasing the blow ratio, the bubble aspect ratio in the width direction of the elongated foam uneven portion 11 of the stretched foam sheet material 1 can be increased.

  In the case of T-die molding as shown in FIG. 4, the take-up speed is increased in a state where the sheet body is plasticized, and the pull-out is increased to increase the drawing direction of the elongated foam uneven portion 11 of the expanded foamed sheet material 1. The bubble aspect ratio can be increased, or the bubble aspect ratio in the width direction can be increased by heat setting using a tenter machine, and the sheet is cut along the eyes in the major axis direction. Can be made easier.

  Furthermore, the surface roughness is preferably in the range of average roughness (μm) / sheet body thickness (μm) × 100 = 1-30 (%) of the center line of the long-bubble irregularities 11. In measuring the average roughness of the center line, a measuring instrument: Tokyo Seimitsu Co., Ltd./HANDYSURF E-35A is used, with a cutoff value of 0.8 mm and a measurement length of 10.0 mm. Measure the trace.

  Furthermore, in this embodiment, it is preferable that the expansion ratio is in the range of more than 1 to 30 times. This is because if the magnification is too small, the concavo-convex portion cannot be formed sufficiently, and conversely if it is too large, the film physical properties are lowered and the strength that can withstand use cannot be obtained.

  Furthermore, if necessary, the cell diameter of the foam can be further reduced by using a small amount of a foam nucleating agent. At this time, the amount used is in the range of 0.01 to 1 part (more preferably 0.05 to 0.5 part). This is because if too much is added, the transparency deteriorates. In addition, as a filler used, inorganic things, such as a talc, a calcium carbonate, a titanium oxide, an organic type foaming agent, etc. are employable.

  Then, the adhesive material layer 12 is provided on the other surface. As this adhesive material, it is possible to employ a rubber-based adhesive material such as natural rubber, styrene-butadiene rubber, polyisobutylene rubber, isoprene rubber, or an acrylic adhesive material such as 2-ethylhexyl acrylate or butyl acrylate polymer. It is applied to the back surface of the sheet material 1 by a conventional application means.

  The stretched foamed sheet material 1 thus produced is wound in a roll shape with the pressure-sensitive adhesive layer 12 side facing outward. In the present embodiment, as an easy-to-use size, the sheet is wound up to a width of 1.2 m × a length of 50 m (see FIG. 5), and the outer peripheral surface is covered with an anti-adhesion film.

  Next, the laying method when constructing the sheet of the present invention produced as described above will be described. First, the stretched foam sheet material 1 is unwound on the target floor surface F at the building site. In the present embodiment, by reducing the contact area of the back surface of the roll wound up by the uneven portion by the long bubble uneven portion 11 formed on the surface, the peel strength is reduced, and it is difficult to be attached at the time of unraveling. It enabled quick and easy work.

  Then, in FIG. 6, the adhesive material layer 12 is laid while abutting and sticking to the target floor surface F. In the present embodiment, as described above, one roll is manufactured to have a width of 1.2 m and a length of 50 m, and is sequentially laid on the target floor surface F. As described above, the long bubble irregularities 11 formed on the surface of the stretched foam sheet material 1 can buffer and protect the impact from the top of the sheet to the floor surface, and can prevent slippage on the sheet surface.

  In the present embodiment, the adhesive layer 12 of the stretched foam sheet material 1 can be subjected to at least one of corona treatment, plasma treatment, flame treatment, UV treatment, and primer treatment to improve adhesion. Combined with preventing the deviation, the effect of preventing slipping of the surface by the long bubble irregularities 11 can be further enhanced.

  Further, the stretched foam sheet material 1 has a transmittance so that the black line on the floor surface does not disappear when the sheet material 1 is laid by adjusting the mixing amount and aspect ratio of the foaming agent A. It is preferable to make it 40 to 95%.

[Experiment data]
The performances of the stretched foam sheet material 1 used in the method of the present embodiment prepared by blending each material are shown below.
(Embodiment product) L-LDPE: LDPE: Baking soda, citric acid-based foaming agent “Formulation 1” 50: 50: 1
“Formulation 2” 70: 30: 1
“Formulation 3” 50: 50: 1.5
(Conventional product) L-LDPE: LDPE
“Comparative Example” 50: 50

Formulation 1 Formulation 2 Formulation 3 Comparative Example Thickness (μm) 85 180 100 100
Surface roughness (μm): Uneven surface 5.9 10.6 8.9 0.31
Surface roughness (μm): Smooth surface 4.9 6.0 2.9 0.29
Total light transmittance 550 nm (%) 66.7 70.3 62.8 89.9
Foamed cell aspect ratio 8.8 5.1 7.3 ―
Coefficient of static friction: uneven surface 2.16 2.65 2.20 1.38
Coefficient of static friction: Smooth surface 1.64 1.70 1.85 1.38
Tensile strength extrusion direction (N / cm) 12.77 20.61 10.96 14.24
Tensile strength vertical direction (N / cm) 4.59 7.46 4.21 12.71
Peel strength (back) (N / 25mm) 0.03 0.05 0.02 0.21

[Discussion]
From the above results, the product of this embodiment has a sufficient surface roughness as compared with the conventional product, and a high static friction coefficient can be obtained. Moreover, since peeling strength is small, it can unwind quickly and can implement | achieve the outstanding workability.

  The present invention is generally configured as described above. However, the present invention is not limited to the illustrated embodiment, and various modifications can be made within the description of “Claims”. The plastic P of the material 1 is not limited to low-density polyethylene (LDPE), and high-density polyethylene (HDPE), polypropylene (PP), and ethylene / vinyl acetate copolymer (EVA) can be used alone or in combination. Can be used.

  Further, the width and length of the roll can be appropriately changed in design so that the stretched foam sheet material 1 can be easily laid on the target floor surface F, and both of these are within the technical scope of the present invention.

It is the schematic showing the manufacturing process of the stretched foam sheet material used for embodiment of this invention. It is explanatory front view showing the structure of the stretched foam sheet material used for embodiment of this invention. It is a perspective view of the expanded foamed sheet material used for embodiment of this invention. It is the schematic showing the modification of the manufacturing process of the stretched foam sheet material used for embodiment of this invention. It is explanatory sectional drawing showing the structure of the stretched foam sheet material used for embodiment of this invention. It is an explanatory perspective view showing the laying situation of the protection method of the embodiment of the present invention.

1 Stretched foam sheet material
11 Long bubble irregularities
12 Adhesive layer P Molten plastic A Foaming agent F Target floor

Claims (6)

A stretched foam sheet material 1 in which a synthetic material in which a foaming agent A is mixed into a molten plastic P is extruded from a die of an extruder into a thin film and stretched in one or two axes,
While the foaming agent A is foamed, the long bubble irregularities 11 are formed in the extrusion direction or the width direction of the sheet surface, while the adhesive layer 12 is provided on the other surface,
The bubbles in the long bubble irregularities 11 on the surface of the stretched foam sheet material 1 are closed cells, and the ratio of the major axis to the minor axis of the long bubble is in the range of 3 to 15 ,
A floor surface protection and anti-slip sheet for a building site, characterized in that the long bubble irregularities 11 provide buffering protection from impact on the floor surface from the sheet and prevent slippage on the sheet surface.   The floor protection and anti-slip sheet for a building site according to claim 1, wherein the sheet is extruded in a thin film form from a die having a thickness of 0.05 to 1 mm in an extruder.   The adhesive layer 12 of the stretched foam sheet material 1 is subjected to at least one of corona treatment, plasma treatment, flame treatment, UV treatment, and primer treatment, and adhesion is improved. Floor protection and anti-slip sheet for building sites as described.   The molten plastic P is mixed with 30% or more of linear low-density polyethylene, and the floor protection and anti-slip sheet for a construction site according to any one of claims 1 to 3.   The floor protection and anti-slip sheet for a building site according to any one of claims 1 to 4, wherein a foaming agent A is mixed into the molten plastic P and the foaming ratio is more than 1 to 30 times. . The synthetic material in which the foaming agent A is mixed into the molten plastic P is extruded into a thin film form from the die of the extruder, and the sheet body is stretched uniaxially or biaxially and then cooled.
By foaming the foaming agent A, a long bubble concavo-convex portion 11 is formed in the extrusion direction or the width direction of the sheet surface, the bubbles in the long bubble concavo-convex portion 11 are made into independent bubbles, and the long diameter of the long bubble is While the ratio to the minor axis is in the range of 3-15 ,
A stretched foam sheet material 1 is prepared by providing an adhesive material layer 12 on the other surface, and the stretched foam sheet material 1 is wound in a roll shape with the adhesive material layer 12 facing outside,
Unwinding the stretched foam sheet material 1 on the target floor surface F at the building site, laying the outer adhesive material layer 12 while abutting and sticking to the target floor surface F,
Protecting the floor surface at the construction site characterized by buffering and protecting the impact from the sheet surface to the floor surface by the long bubble irregularities 11 on the surface of the stretched foam sheet material 1, and preventing slipping on the sheet surface Anti-slip method.

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