JPH08170272A - Prime roofing material - Google Patents

Abstract

PURPOSE: To provide a prime roofing material applicable in a simple way in a short time without impairing its waterproofness, with no relevant workers endangered during application, and capable of improving its applicability. CONSTITUTION: This prime roofing material is so designed that the back surface of a base material layer 1 is provided with a repeelable tack layer 2 with a peel strength to a roofing substrate of <=1.0kg/25mm. Owing to the tackiness of the tack layer 2, this roofing material can be fixed onto the substrate, rendering needless to use any tacker. As this roofing material can be fixed through the tack layer 2 simultaneously with laying the roofing material on the substrate, relevant worker(s) can be ensured not to slip down the roofing material along the slope of the substrate even if he (they) get on the roofing material. Besides, because the tack layer 2 has the above-mentioned characteristics, it can be peeled off again after applied onto the substrate, facilitating correction of its applied position.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a roof underlaying material to be laid on a roof base material of a building.

[0002]

2. Description of the Related Art The roof of a building such as a house is constructed by laying a waterproof roof underlaying material on a roof base material formed of a control panel, plywood, etc. Although the roofing material is constructed by roofing, various materials have been proposed as the under-roofing material.

The under roofing material shown in FIG. 3 (a) is formed by impregnating kraft paper or non-woven fabric with asphalt to form a base material layer 1 and providing a mineral powder layer 10 on the front and back surfaces thereof.
This is what is called asphalt roofing.
Further, the under-roofing material shown in FIG. 3 (b) is a so-called resin-based roofing formed by providing the terfelt layer 12 on the back surface of the vinyl chloride sheet 11. Further, in the under roofing material shown in FIG. 3C, a rubber sheet or a resin sheet is used as a base material layer 1, an adhesive layer 2 is provided on the back surface thereof, and a release layer 13 such as release paper is provided on the back surface of the adhesive layer 2. Are formed.

[0004]

FIG. 3 (a) above,
The under-roofing material of (b) has a problem that it is necessary to fix it to the roofing base material with a nail or a tacker, which is troublesome, and the construction cannot be easily performed in a short time. In addition, if the under roofing material is fixed with nails or tackers in this way, the load is concentrated on the fixed parts, and the under roofing material may be torn or cracked, and rainwater may infiltrate from the tears or cracks. There is a risk that the waterproofness will be impaired. Furthermore, when applying these roof underlaying materials to the roof underlaying material, first lay the roof underlaying material on the roof underlaying material, and then the operator rides on the roof underlaying material and nails or tackers. However, the roof underlaying material, which is not fixed with nails or tackers, tends to slide down on the roof base material along the slope thereof, which may be dangerous to the operator.

Further, the above-mentioned under-roofing material of FIG. 3 (c) has to be constructed by peeling off the peeling layer 13 from the adhesive layer 2, which causes a problem that the peeling layer 13 becomes a dust. Further, the peel strength of the adhesive layer 2 of such a roof underlaying material is about 1.9 kg / 25 mm (25
A test piece is prepared by cutting it into a tape with a width of mm, and the test piece is attached to a plywood. After that, the force required to peel the test piece from the plywood in a 90 ° C atmosphere in the same manner as a 180 ° bending peel test. When the peel strength of the adhesive layer 2 is large in this way, it is difficult to peel off the roof underlaying material once attached to the roof base material, and it becomes difficult to perform work such as correction of the tension position, resulting in poor workability. There was a problem.

The present invention has been made in view of the above points, and the construction can be performed easily and in a short time, the waterproof property is not impaired, and the worker is in danger during the construction. It is an object of the present invention to provide an under-roofing material that is free of dust and can prevent the generation of dust and improve workability.

[0007]

The roof underlaying material A according to the present invention has a peel strength of 1.0 kg / 25 m from the roof underlaying material.
It is characterized in that the adhesive layer 2 which can be re-peeled off by m or less is provided on the back surface of the base material layer 1. In the present invention,
The surface of the base material layer 1 may be provided with a protective layer 3 to which the adhesive layer 2 does not adhere.

[0008]

[Function] Peel strength from roofing base material is 1.0 kg / 25 m
Since the adhesive layer 2 that can be peeled off at a distance of m or less is provided on the back surface of the base material layer 1, it can be fixed to the roof base material by adhesion of the adhesive layer 2, and it is not necessary to use a nail or a tacker. Further, it can be laid on the roof base material and fixed with the adhesive layer 2 at the same time, so that it can be prevented from slipping down along the slope of the roof base material even when an operator rides. Further, the adhesive layer 2 has a peel strength of 1.0 kg / 25 mm from the roof substrate.
Since it can be peeled off again below, it can be peeled off again after being attached to the roofing base material, and the tensioning position can be easily corrected.

Further, since the protective layer 3 to which the adhesive layer 2 does not adhere is provided on the surface of the base material layer 1, the adhesive layer 2 does not adhere to the surface of the base material layer 1 even when wound in a roll shape. It is not necessary to provide a release layer such as release paper for preventing the adhesive layer 2 from sticking to the base material layer 1.

[0010]

EXAMPLES The present invention will be described in detail below with reference to examples. FIG.
As shown in, the under-roofing material A is formed by providing the adhesive layer 2 on the entire back surface of the base material layer 1 and the protective layer 3 on the entire surface of the base material layer 1. .

As the base material layer 1, a resin sheet such as a vinyl chloride sheet, a rubber sheet, or a sheet formed by impregnating kraft paper or non-woven fabric with asphalt or resin can be used. The adhesive layer 2 is formed by applying an adhesive containing acrylic rubber and its polymer as a main component to the back surface of the base material layer 1. The adhesive can be applied by any method, and for example, a method such as spray gun application, roll application, bar coating, curtain coating, or the like can be used. The protective layer 3 is formed by applying a coupling agent to the surface of the base material layer 1 to inactivate the surface of the base material layer 1, applying a coating material to the surface of the base material layer 1, or the surface of the base material layer 1. It can be formed by adhering a polymer film to.

The peel strength of the above-mentioned adhesive layer 2 to the roof base material formed of plywood or control panel is 1.0 kg / 25 mm.
(A test piece is prepared by cutting the roofing material into a tape having a width of 25 mm, and the test piece is attached to plywood.
The force required for peeling the test piece from the plywood in the atmosphere of 90 ° C. according to the procedure of the 0 ° bending peeling test) or less, and preferably 0.3 to 0.6 kg / 25 mm. When the peeling strength of the adhesive layer 2 exceeds 1.0 kg / 25 mm, it becomes difficult to peel off the roof underlaying material A once stretched on the roof base material again,
When it becomes impossible to correct the tension position and the peel strength of the adhesive layer 2 is less than 0.3 kg / 25 mm, the roof underlaying material and the roof underlaying material A become insufficient in adhesion, and the roof underlining material. There is a risk that a nail or a tacker will be needed to fix the roof, or when an operator rides on the roofing material A during construction, the roofing material A may slide down along the slope of the roof base material. is there.

The protective layer 3 is for preventing the adhesive layer 2 from sticking to the surface of the base material layer 1.
Even if the under-roofing material A is rolled into a roll state, the adhesive layer 2 sticks to the base material layer 1 to prevent the roll from unwinding, or the adhesive of the adhesive layer 2 is transferred to the surface of the base material layer 1. It can be prevented. Next, the performance of the present invention will be evaluated with reference to specific examples.

(Specific Example 1) A substrate layer 1 having a terfelt layer 11 provided on the back surface of a vinyl chloride sheet 12 ("Hightonton VR-96" manufactured by Matsushita Electric Works, FIG. 3).
The same as the conventional example shown in (b) was used. An adhesive (Polysol PSA SE-6010M manufactured by Showa Polymer Co., Ltd.) is uniformly applied to the back surface of the base material layer 1 (the back surface of the terfelt layer 11) with a spray gun, and the solvent contained in the adhesive is removed by drying. Then, the adhesive layer 2 was formed, and the roofing material A for roofing was prepared. The coating amount of the above-mentioned pressure-sensitive adhesive was such that the pressure-sensitive adhesive layer was 10 g / m ² at the time of manufacture. After this, the roofing material A is rolled up to obtain a product.

(Specific Example 2) As the base material layer 1, a rubber sheet ("Fulbest Sheet VR-610" manufactured by Matsushita Electric Works Co., Ltd., which does not have the adhesive layer 2 and the release layer 13, that is, shown in FIG. 3 (c). The one having neither the adhesive layer 2 nor the peeling layer 13 of the conventional example) was used. Then, in the same manner as in Specific Example 1 above, the adhesive layer 2 was formed on the back surface of the base material layer 1 to prepare a roofing material A.

(Specific Example 3) In the same manner as in Specific Example 1, the adhesive layer 2 was formed on the back surface of the base material layer 1, and the surface of the base material layer 1 (the surface of the vinyl chloride sheet 11) was coated with an acrylic paint (MG-96).
(The product of Godo Kagaku Co., Ltd.) was uniformly applied with a roll coater and dried to form a protective layer 3 on the surface of the base material layer 1 to prepare a roofing material A for roofing. The amount of the acrylic paint applied was such that the protective layer 3 would have a weight of 3 to 5 g / m ² after drying.

(Specific Example 4) In the same manner as in Specific Example 2, the adhesive layer 2 was formed on the back surface of the base material layer 1, and the base material layer 1 (rubber sheet).
As a protective layer 3, a polypropylene sheet having a thickness of 0.04 mm was bonded to the surface of the above to prepare a roofing material A for a roof. (Comparative Example 1) The base material layer 1 of Example 1 was used as a roof underlayment material (that is, a conventional example shown in FIG. 3B).

(Comparative Example 2) The base material layer 1 of the specific example 2 was used as a roof underlaying material (that is, without the adhesive layer 2 and the peeling layer 13 of the conventional example shown in FIG. 3 (c)). (Comparative Example 3) An adhesive layer 2 and a release layer 13 were provided on the back surface of the base material layer 1 of Example 2 to prepare a roof underlaying material (that is, FIG. 3).
Conventional example shown in (c).

A slip test was conducted on the above-mentioned specific examples 1 to 4 and comparative examples 1 to 3. In the slipperiness test, each concrete example and comparative example were cut into a size of 10 × 10 mm to obtain a sample B, and the sample B was placed on the plywood 20 as shown in FIG. A 5 kg weight 21 was placed on the sample, and in this state, Sample B was pulled by an autograph tensile strength tester in the direction of the arrow at a speed of 100 mm / min, and the tensile load (unit: kgf) at this time was measured. Further, this slipperiness test was conducted in both the dry state and the wet state at the interface between the sample B and the plywood 20.

Further, the above-mentioned specific examples 1 to 4 and comparative examples 1 to 3
The workability test was conducted. The workability test is a gable, 5 inch slope, an area of 40 m ² and a roof base material thickness of 12 m.
The actual construction was performed on the roof of a one-story (1F building) formed of plywood of m, and the construction time (unit: minutes) required at that time was measured. The weather was fine and the temperature was 20 ° C. In addition, in this workability test, it was determined whether a nail or a tacker was required.

Further, a blocking property test was conducted on the above specific examples 1 to 4. In the blocking property test, a concrete example was cut into a width of 20 mm to prepare a sample C, and the sample C was vertically cut into 5 parts as shown in FIGS. 2 (b) and 2 (c).
When the sheets are piled up, a bottom surface of 20 × 20 mm and a weight 22 of 1.6 kg and a weight of 1.6 kg are placed on the piled up sample C, and then a 180 ° bending peeling test (speed 240 mm / min with a Shopper type tensile strength tester). ) Was performed and the peel strength (unit: kgf) at that time was measured.

Further, a transferability test was conducted on the above specific examples 1 to 4. In the transferability test, after the blocking property test, each sample C was peeled off, and it was visually confirmed whether the adhesive layer 2 was transferred to the surface of the sample C. The results of each of the above tests are shown in Table 1.

[0023]

[Table 1]

In Table 1, Concrete Examples 1 and 2 and Comparative Examples 1 and 2
When comparing the results of the slipperiness test of Example 1, it can be seen that the concrete examples 1 and 2 are less slippery than the comparative examples 1 and 2. That is, in the specific examples 1 and 2, the adhesive layer 2 can prevent slipping on the roof base material. In addition, comparing the results of the workability tests of the specific examples 1 and 2 and the comparative examples 1 and 2, the specific examples 1 and 2 can be completed by simply laying them without the need for nails or tuckers. It can be seen that in comparison with Comparative Examples 1 and 2, nails and tuckers are required, which requires a short time, but the construction time is long.

Further, comparing the results of the slipperiness tests of Examples 1 and 2 and Comparative Example 3, it was found that Comparative Example 3 was less slippery than Examples 1 and 2, and in the workability test, Comparative Example 3 was used. It can be seen that the construction time is much longer than in the concrete examples 1 and 2. This is because the adhesive layer 2 of Comparative Example 3 has a large adhesive force and requires a large amount of force to peel off once it is stretched on the roof base material. Therefore, in Comparative Example 3, the workability becomes low. .

In the blocking property test, each of the concrete examples 1 to 4 can peel off each sample with a small force, and in the transfer property test, each of the concrete examples 1 to 4 has the surface of the substrate layer 1. Almost no transfer of the pressure-sensitive adhesive layer 2 was observed, and it can be seen that the concrete examples 1 to 4 have performances that pose no practical problems.

[0027]

As described above, according to the present invention, the releasable pressure-sensitive adhesive layer with a peeling strength of 1.0 kg / 25 mm or less from the roof substrate is provided on the back surface of the base material layer. Since it can be fixed to the roofing base material, it is not necessary to use nails or tuckers, and it does not take time and effort to hit nails or tuckers, and construction can be performed easily and in a short time. Further, since the present invention does not fix with nails or tuckers, stress is not concentrated on the parts fixed with nails or tuckers, so that tearing or cracking does not occur and waterproofness is not impaired. Is something that can be done. In addition, the present invention can be laid on the roof base material and can be fixed with an adhesive layer at the same time, so that it is possible to prevent the worker from slipping down along the slope of the roof base material, which is dangerous to the worker. It is something that can be prevented. Furthermore, since the adhesive layer has a peel strength of 1.0 kg / 25 mm or less from the roof base material and can be re-peeled, it can be peeled off again after being attached to the roof base material, and it is possible to easily correct the tension position. Therefore, the workability can be improved.

Further, according to the present invention, the protective layer is provided on the surface of the base material layer so that the adhesive layer does not stick to the surface of the base material layer. It is not necessary to provide a release layer such as release paper to prevent the adhesion of the adhesive layer to the adhesive layer, and it is possible to improve the workability by eliminating the work of peeling off the release layer and not generating dust after application. Is something that can be done.

[Brief description of drawings]

FIG. 1 is a sectional view showing an embodiment of the present invention.

FIG. 2 (a) is a schematic view showing a slip test, (b),
(C) is a schematic diagram showing a blocking property test and a transfer property test.

3A, 3B, and 3C are cross-sectional views showing a conventional example.

[Explanation of symbols]

 1 Base material layer 2 Adhesive layer 3 Protective layer A Roofing material

Claims (2)

[Claims] 1. The peel strength from a roof substrate is 1.0 kg /
An under-roofing material, characterized in that a removable adhesive layer having a thickness of 25 mm or less is provided on the back surface of the base material layer. 2. The roof underlayment material according to claim 1, further comprising a protective layer provided on the surface of the base material layer so that the adhesive layer does not stick to the surface.