JP2993588B2 - Construction method of sheet flooring - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for applying a vinyl floor sheet to a floor substrate having gaps and varying intervals, such as a mortar substrate having cracks, an iron plate substrate for floor heating, and a plywood substrate. .

[0002]

2. Description of the Related Art Vinyl sheet flooring is usually applied to a floor substrate with an adhesive. As a floor base, a mortar base, an iron plate base for floor heating, a plywood base, and the like are usually used. These bases have cracks and joint gaps (hereinafter referred to as gaps) and expand and contract. Conventionally, these gaps were bonded and covered with a vinyl sheet floor material.

[0003] However, when the floor substrate expands around the gap, as shown in the conventional floor material construction sectional view of Fig. 7, the floor substrates 1 and 1 'expand, the gap 2 contracts, and the sheet floor material 3 adheres. Although they were adhered by the agent 4, swelling 5 due to the contraction of the gap occurred.

On the other hand, when the floor substrate shrinks around the gap, as shown in FIG. 8, the floor substrates 1, 1 'shrink, the gap 2' expands, and the sheet flooring 3 is elongated, and a dent 6 occurs. The adhesive used in the conventional bonding method has a shear bond strength of 0.4 kgf / cm ² or more, and therefore, the floor material must expand and contract with the expansion and contraction of the floor substrate, and as a result, swelling and dents occur. And made the floor unsightly.

[0005]

SUMMARY OF THE INVENTION An object of the present invention is to provide a method of constructing a flooring material which does not cause any swelling or dents after a long time even if a vinyl sheet flooring material is constructed so as to cover the gap between the expanding and contracting floor bases. Is to do.

[0006]

According to the present invention, an adhesive having a shear bond strength of 0.4 kgf / cm ² or less and a 90 ° peel bond strength of 0.5 kgf / 2.5 cm or more is applied to a floor substrate. The present invention also relates to a method for constructing a sheet floor material, wherein a plastic sheet floor material is adhered thereon.

In the present invention, the shear adhesive strength and the 90 ° peel adhesive strength of the adhesive are values measured by the method of Reference Example described later.

FIG. 1 is a partially cutaway plan view of the construction state of the present invention. There is a gap 2 in the floor base 1 of the room, and the base 7 corresponding to the center of the sheet floor material is coated with the adhesive 7 of the present invention. On the other hand, the peripheral edge of the flooring material has a shear adhesive strength of 0.4k.
A strong adhesive 8 of gf / cm ² or more is applied, and the vinyl sheet flooring 3 is bonded. Normally, a strong adhesive is applied to the peripheral portion of the sheet floor material, and the adhesive of the present invention is applied to the central portion to complete the construction. The adhesive 7 has a shear adhesive strength of 0.4 kgf / cm ² or less, preferably 0.08 to 0.4 kgf / cm ^2.
2 , the 90-degree peel adhesive strength is 0.5 kgf / 2.5 cm or more, preferably 0.5 to 10 kgf / 2.5 cm. This adhesive is a so-called weak adhesive such as an acrylic emulsion adhesive, a pressure-sensitive adhesive tape, or a latex adhesive, but is not limited as long as the physical properties are satisfied.

On the other hand, the adhesive 8 has a shear adhesive strength of 0.4 kgf.
/ Cm ² or more so-called strong adhesive. For example, adhesives of urethane type, vinyl acetate type, latex type, epoxy type and the like can be mentioned. Both the adhesives 7 and 8 have a 90-degree peel adhesive strength of 0.5 kgf / 2.5 cm or more, and the floor material does not peel off from the base during use.

FIGS. 2 and 3 are cross-sectional views showing a case where a gap is narrowed after a sheet floor material is applied in the present invention. At this time, in the cross section of the adhesive, the floor substrate extends in the directions of arrows a and a 'and the gap shrinks, but the shear adhesive strength of the adhesive is 0.4 kgf / cm ² or less. Keeps the same state at point A without shrinking. This is because the adhesive at a low shear bond strength breaks the bond at the same position as the floor substrate moves, and stays at the same position without following the change in the floor substrate.

FIGS. 4 and 5 are cross-sectional views of the present invention in which the gap is widened after construction. The floor substrate is shrunk in the directions of b and b ', and as a result, the gap is widened. However, since the shear bond strength of the adhesive is low at YY 'in the adhesive layer, the bond between the floor substrates 2, 2' and the sheet floor material is broken, and the point B
In the sheet floor material does not change. As a result, even if the width of the gap is widened, no recess is formed in the floor material.

When the gap between the bases changes, the sheet tends to stay at the original position, so that the adhesive in the vicinity of the gap receives a shearing force in a direction opposite to the movement of the base, but the adhesive has a shearing adhesive strength. Since it is small and has a moderate peel adhesive strength, the sheet flooring thereon does not bulge or dent. It also has a 90-degree peel adhesive strength that does not impair walking. In addition, since the periphery of the sheet is constructed with an adhesive having a large adhesive force, the shrinkage of the end of the flooring due to the passage of time of the sheet can be prevented.

When the method of the present invention is used in a room that is not too large, there is almost no joint between the sheet flooring and the sheet flooring. Adhesive with an adhesive of 0.4 kgf / cm ² or less, and only the peripheral edge of the sheet floor material has a shear adhesive strength of 0.4 kgf / cm ^2.
/ Cm ² can be used as an application method.

In another preferred embodiment, when the method of the present invention is used in a large room, of the plurality of sheet flooring materials, the sheet bonding material at the center of the room has a shear bond strength of 0.4 kgf / kg. bonded with cm ² or less of the adhesive sheet for flooring periphery partially only shear bond strength in a portion contacting room room periphery with adhesive exceeds 0.4 kgf / cm ^2, other portions Has a shear bond strength of 0.4 kgf / cm
There can be mentioned a construction method of bonding with an adhesive of ² or less. In the case of this method, it is preferable that joint portions between adjacent sheet floor materials are joined by a method such as ordinary welding.

[0015]

EXAMPLES Reference examples, examples and comparative examples are shown below.

REFERENCE EXAMPLE 1 A sample of a PVC sheet floor material (floor lume, FL) having a length of 100 mm and a width of 25 mm is opened on a slate substrate by half of the sample, that is, 50 mm in length, with an adhesive described below and an open time of 10 minutes. Pasted. 7 at 20 ° C and 65% RH
After curing for a day, the shear bond strength of PVC sheet flooring,
Tensile measurement was performed at 50 mm / min in the longitudinal direction. Also 90
The peel strength was measured in accordance with JIS A5536 by sticking at an open time of 10 minutes and pulling upward at 200 mm / min. Table 1 shows the results.

[0017]

[Table 1]

A: Acrylic emulsion adhesive (GA cement) B: Acrylic emulsion adhesive (AR cement) C: Rubber latex adhesive (royal cement) D: Vinyl acetate solvent adhesive (FL cement)

Example 1 and Comparative Examples 1 to 3 An aluminum plate having a predetermined thickness was sandwiched between two plywoods spaced as shown in FIG. 6 and fixed by two clamps. On the surface of the plywood, use the adhesive of Reference Example 1 to perform PV
C-sheet floor material floor lume (hereinafter abbreviated as FL) was attached and the adhesive was cured. After the adhesive is cured, replace the aluminum plate and set the interval from the first 0.5mm to 0mm from 0.1mm.
When narrowing in mm increments, that is, when the narrowing amount is 0.1 to
The swelling of the surface of the floor material when the thickness was 0.5 mm was observed. In the evaluation method, the swelling was visually evaluated by the following four-stage evaluation. 1: no swelling 2: slight swelling 3:
There is some swelling 4: There is swelling. The swelling height was measured by drawing a surface undulation curve with a surface roughness meter. The overall evaluation was indicated by ：: good, Δ: normal, × poor. The results are shown in Table 2.

[0020]

[Table 2]

Example 2 A sample of a PVC sheet floor material (FL) having a length of 900 mm and a width of 75 mm was prepared by using adhesives B to D at both ends in the longitudinal direction (each 50 mm in length) and in the center (100 mm in length). The other parts were adhered to the slate substrate with an adhesive A in an open time of 10 minutes. After pasting, 20 ℃, 65% RH
After curing for 7 days, cut only the center of the sheet, length 4
It was divided into 50 mm units. Thereafter, the sample was heated at 40 ° C. for 1 hour.
1 day → 11 days at normal temperature → 1st measurement → 6 days at 40 ° C →
At room temperature for 2 days → The second measurement cycle was performed, and the width of the gap formed in the central division was examined. The gap width was measured with a loupe. As a result, the gap width was as shown in Table 3.

[0022]

[Table 3]

From Table 3, it can be seen that the strong adhesive force does not cause shrinkage at the adhesive end of the floor material.

[0024]

According to the present invention, the sheet flooring constructed in accordance with the construction method of the present invention does not bulge or dent in the gap even if the gap of the foundation fluctuates. There is no shrinkage due to.

[Brief description of the drawings]

FIG. 1 is a partially cutaway plan view of a construction state of the present invention.

FIG. 2 is a cross-sectional view showing a case where a gap is narrowed after a sheet floor material is applied in the present invention.

FIG. 3 is a cross-sectional view showing a case where a gap is narrowed after a sheet floor material is applied in the present invention.

FIG. 4 is a cross-sectional view showing a case where a gap widens after a sheet floor material is applied in the present invention.

FIG. 5 is a cross-sectional view showing a case where a gap is widened after a sheet floor material is applied in the present invention.

FIG. 6 is an experimental apparatus for examining the occurrence of swelling of the sheet floor material when the joint spacing of the base is reduced.

FIG. 7 is a cross-sectional view of a conventional flooring material when swelling has occurred in a floor substrate.

FIG. 8 is a cross-sectional view of a conventional floor material when a dent has occurred in a floor base.

[Explanation of symbols]

 Reference Signs List 1, 1 'floor base 2, 2' gap 3 sheet floor material 4 adhesive 5 swelling due to shrinkage under floor 6 dent due to expansion of floor base 7 weak adhesive 8 strong adhesive

──────────────────────────────────────────────────続 き Continued on the front page (72) Inventor Naotoshi Murakami 5-125 Higashi-Arioka, Itami-shi, Hyogo Tori Co., Ltd. (58) Field surveyed (Int.Cl. ⁶ , DB name) E04F 15/16 E04D 5 /14

Claims (6)

(57) [Claims] 1. A shear bond strength of 0.4 kgf / cm ² on a floor substrate.
A method for constructing a sheet floor material, comprising: applying an adhesive having a 90-degree peel adhesive strength of 0.5 kgf / 2.5 cm or more, and adhering a plastic sheet floor material thereon. 2. The adhesive has a shear bond strength of 0.08 to 0.4.
In kgf / cm ^2, 90 ° peel strength 0.5～10Kgf /
2. The method according to claim 1, wherein the length is 2.5 cm. 3. The method according to claim 1, wherein cracks or gaps are present in the floor substrate. 4. An adhesive is applied to a floor substrate, and a plastic
For the construction method of the sheet floor material to stick the stick sheet floor material
Fraud and mitigating risk sheet flooring heart and adhesive shear bond strength at 0.4 kgf / cm ² or less of the adhesive to the underfloor, adhesive only shear bond strength sheet periphery exceeds 0.4 kgf / cm ² Construction method characterized by bonding with 5. An adhesive is applied to a floor substrate, and a plastic
Stick a sticky sheet floor material to place multiple sheet floor materials under the floor
In the method of construction on the ground, the entire surface of the sheet floor material in the center of the room is bonded with an adhesive having a shear bond strength of 0.4 kgf / cm ² or less, and the sheet floor material at the periphery of the room is the periphery of the room. in the adhesive only shear bond strength partially portion contacting with part exceeds 0.4 kgf / cm ^2, the other parts that shear bond strength to adhere at 0.4 kgf / cm ² or less of the adhesive
Construction method characterized by the following . 6. The method according to claim 1, wherein the adhesive is an acrylic emulsion-based adhesive.