JP3225167B2 - Asphalt roofing felt - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

TECHNICAL FIELD The present invention relates to an asphalt roofing felt useful as a roofing material.

[0002]

2. Description of the Related Art Many roofs of general detached houses have a slope, and various materials such as tiles, slate, metal, and asphalt shingles are used as finishing materials.
When these finishing materials are used, in most cases, the groundwork is made of a base plate such as plywood, which is used for protecting the base plate from moisture and preventing rainwater from entering through nail holes for fixing the finishing material. It is customary to lay asphalt roofing felt between the base plate and the finishing material. This asphalt roofing felt is made by impregnating and coating thick paper with asphalt and spraying mineral powder on both sides to prevent adhesion.

[0003] The functions particularly required for such underlining materials include (a) that workers can work safely without slipping down even on a steep roof surface, that is, that they have non-slip properties; That the coated asphalt of the underlay material adheres to the back of the footwear and does not stain the surface of the finished material, that is, has a stainproof property.

[0004] By the way, asphalt roofing felt as an underlaying material has a problem that if the amount of mineral powder on its surface is too large, it becomes very slippery due to the effect of excess sand. Conversely, if the amount is too small, the coated asphalt will adhere to the back of the worker's footwear and contaminate the finishing material, especially in the midsummer, and asphalt roofing felt uses only thick paper as the base material Therefore, the tear strength is weak, and in recent years the construction of complex roofs with fancy designs,
It is said that it is easily broken during construction.

[0005]

SUMMARY OF THE INVENTION It is a first object of the present invention to provide an underlaying material such as a nail hole sealing property which is free from the concerns of slipping and dirt seen in conventional asphalt roofing felt in the construction of a sloped roof. The purpose of the present invention is to provide a new general-purpose roofing material that satisfies the required performance. The second object of the present invention is to change the image of black color, which can be called a disadvantage, while taking advantage of the excellent waterproofness of asphalt,
The object is to provide a new underlaying material having a high design appearance. A third object of the present invention is to improve the point of the conventional asphalt roofing felt where the tear strength is weak.

[0006]

Means for Solving the Problems The first aspect of the present invention is that (a) an anti-slip synthetic resin layer containing fine particles, (b) a base layer made of a nonwoven fabric or a woven fabric, (c) an asphalt layer, and (d) a mineral. The present invention relates to asphalt roofing felt, which is laminated in the order of a powder layer.

The second aspect of the present invention is that (a) a non-slip synthetic resin layer containing fine particles, (b) a base layer made of a nonwoven fabric or a woven fabric, (c) an asphalt layer, (e) a self-adhesive layer, and (f) peeling. The present invention relates to asphalt roofing felt, which is laminated in the order of layers.

The substrate layer made of a nonwoven fabric or a woven fabric may be made of mineral fibers such as glass fibers, but is preferably made of synthetic fibers. The synthetic resin is not particularly limited, and examples thereof include a polyester resin such as polyethylene terephthalate, a polyamide resin such as nylon 6, a polyacrylonitrile resin, a polyethylene resin, and a polypropylene resin. These fibers can be used alone or in combination.

The base fabric may be a non-woven fabric or a woven fabric.
A nonwoven fabric is more advantageous in terms of economy, and a nonwoven fabric by a spunbond method is particularly preferred. Basis weight, in particular 30 to 100 g / m ² to not generally limited, preferably to provide a sufficient tear strength of about 50 to 100 g / m ^2.

The anti-slip synthetic resin layer of the present invention can be formed, for example, as a coating film on a substrate layer. in this case,
A mixture of 3 to 25 parts by weight of fine particles with respect to 100 parts by weight of the synthetic resin paint can be used, and a water repellent, a paint, a pigment, a thickener and the like can be added as needed. The coating amount of the anti-slip synthetic resin layer is 20 to 100 g.
/ M ² , preferably 40 to 60 g / m ² satisfactorily achieves the intended purpose.

The use of a water repellent can further improve the waterproofness of the roofing material, and does not cause water leakage even in a case where water is leaked if the water repellent is not contained. Additional effects such as occur. Examples of the water repellent include wax, metal soap, silicone, and fluororesin.

When the anti-slip synthetic resin is formed on the substrate layer, the coating amount of the substrate layer is not so large as 30 to 100 g / m ² . In some cases, the anti-slip synthetic resin layer is not formed on the surface of the base material layer. Such a case can be prevented by previously impregnating the base material layer with the water repellent in an appropriate amount. However, care must be taken because an excessive amount of the water repellent may hinder adhesion to asphalt. Usually, the amount of the water repellent used is preferably about 0.5 to 2% by weight based on the substrate.

As the fine particles, there are mineral fine powder, plastic beads and the like. As the mineral powder, silica, silica sand, mica, clay, alumina and the like are used.
Among these mineral powders, silica sand is particularly preferable in consideration of the non-slip effect, dispersibility in a synthetic resin paint, and cost. Examples of the plastic beads include polystyrene beads. If the particle size is too small, it is difficult to obtain non-slip performance, and if it is too coarse, it will hinder dispersion and coating of the synthetic resin paint,
Those having a particle diameter of about 0.05 to 0.3 mm are preferred.
Particularly preferably, the particle diameter is about 0.1 to 0.2 mm.

As the synthetic resin paint, polyurethane, polyester, polyamide, acrylic resin, ethylene-vinyl acetate copolymer, polybutadiene, styrene-butadiene copolymer and the like are used. Since the present invention is a roofing material, it does not originally have such a property that weather resistance is required so much. However, in actual construction, there are cases where the roofing is left for 2 to 4 weeks. It is preferable to use a material having good weather resistance to some extent.

In this sense, the synthetic resins include methyl acrylate, ethyl acrylate, butyl acrylate,
Preferred is a polymer of at least one monomer selected from the group consisting of methyl methacrylate, ethyl methacrylate, and butyl methacrylate, or a copolymer of at least one of the monomers and another vinyl monomer, particularly styrene.

A suitable composition as a synthetic resin paint is 50 to 80 parts by weight of a solvent, preferably 70 to 75 parts by weight, 3 to 25 parts by weight of fine particles, preferably 5 to 10 parts by weight with respect to 100 parts by weight of a synthetic resin. Parts by weight, 3 to 20 parts by weight, preferably 5 to 10 parts by weight of a coloring agent, and 1 to 50 parts by weight, preferably 5 to 20 parts by weight of a water repellent.

The material forming the mineral powder layer is the same as the mineral powder usually used for asphalt roofing, and usually silica sand is used.

As the asphalt component forming the asphalt layer, any asphalt such as straight asphalt, blown asphalt and modified asphalt can be used, but modified asphalt is preferable in consideration of low-temperature characteristics and nail hole sealing properties.

The self-adhesive layer (hereinafter sometimes abbreviated as “self-adhesive layer”) used in the present invention may be a modified asphalt modified with rubber, a synthetic rubber-based adhesive, or the like. In consideration of affinity and nail hole sealing, a self-adhesive layer made of modified asphalt is more preferable.

The release layer is a layer for protecting the self-adhesive layer from coming into contact with other objects, so that any release layer can be used as long as this purpose is achieved. Release paper applied to paper is used.

The first product of the present invention as shown in FIG. 1 is, for example, after a non-slip synthetic resin layer 1 is formed on a base material layer 2, a molten asphalt is formed on the side opposite to the non-slip synthetic resin layer 1. Is applied to form the asphalt layer 3. By doing so, the anti-slip synthetic resin layer 1 is bonded to the asphalt layer 3 via the base layer 2. Of course, the anti-slip synthetic resin component is infiltrated on the surface side of the base material layer 2, and a part of the asphalt layer 3 is infiltrated on the back side of the base material layer 2.

The second product of the present invention as shown in FIG. 2 is, for example, after a non-slip synthetic resin layer 1 is formed on a base material layer 2, a molten asphalt or the like is provided on the side opposite to the non-slip synthetic resin layer 1. Is applied to form the asphalt layer 3. On the other hand, the self-adhesive layer 5 is formed by coating the release layer 6 with a material exhibiting self-adhesion, for example, rubbers, rubber-modified asphalt, or the like. Then, the former asphalt layer 3 and the latter self-adhesive layer 5 can be manufactured by facing each other and laminating them.

[0023]

【Example】

Example 1 (corresponding to the first invention) Regarding the coating material for forming a non-slip synthetic resin layer, (1) Composition: acrylic-styrene copolymer 35 wt% (trade name Ultrasol A-20) No. 7 silica sand 17 wt% calcium carbonate 30% by weight Pigment (blue pigment) 3% by weight Water repellent (wax emulsion) 15% by weight (2) Coating amount 50g / m ²・ Base material Polyethylene terephthalate spunbond 60g / m ² impregnated with silicone resin 1g / m ² as water repellent・ Asphalt layer Blown asphalt coating amount 300g / m ²・ Mineral powder layer No. 7 silica sand Adhesion amount 400g / m ²

Sliding resistance value (ASTM E303) Example 1 110 Conventional product 95 Antifouling property Example 1: No pollution occurs even in summer. Conventional product: In the summer months, asphalt adheres to the footwear of work products, sometimes causing contamination. (Note) Substrate: Synthetic nail: Straight nail Head: 40 mm diameter, 100 mm head in PVC resin pipe Initial value: Check for water leakage after 24 hours Durability treatment: Keep in air at 60 ° C. for 24 hours, then 25 ° C.
Immersing in water and keeping it for 24 hours is one cycle,
Collect data after 7 cycles. Denominator of data: Number of specimens Numerator: Number of leaked specimens

Example 2 (corresponding to the second invention) Regarding the coating material for forming an anti-slip synthetic resin layer, (1) Composition: 35 wt% of acryl-styrene copolymer (trade name Ultrasol A-20) No. 7 silica sand 17 wt% % Calcium carbonate 30% by weight Pigment (blue pigment) 3% by weight Water repellent (wax emulsion) 15% by weight (2) Coating amount 50g / m ²・ Base material 60g of polyethylene terephthalate spunbond impregnated with silicon resin 1g / m ² as water repellent / M ² · Asphalt layer Blown asphalt coating amount 300 g / m ² · Self-adhesive layer SBS * ¹ 15 wt% Asphalt 65 wt% Tackifier * ² 10 wt% Process oil 10 wt% * ¹ : SBS is styrene-butadiene-styrene block copolymer It is united. * ^2: Product of C ₄ and / or C ₉ unsaturated fractions polymer or co the polymer and peeling layer 50 g / m ² kraft release paper Example 2 as a tackifier is also smooth resistance, smear resistance , Nail hole sealing properties and tear strength (N) showed almost the same results as in Example 1.

The embodiments of the present invention are listed below. (1) (a) a non-slip synthetic resin layer containing fine particles, (b) a base layer made of a non-woven fabric or a woven fabric, (c) an asphalt layer, and (d) a mineral powder layer. And asphalt roofing felt. (2) (a) anti-slip synthetic resin layer containing fine particles, (b) base layer made of non-woven fabric or woven fabric, (c) asphalt layer, (e) self-adhesive layer, and (f) release layer. Asphalt roofing felt. (3) The synthetic resin used for the anti-slip synthetic resin layer,
A polymer of at least one monomer selected from the group consisting of methyl acrylate, ethyl acrylate, butyl acrylate, methyl methacrylate, ethyl methacrylate, and butyl methacrylate, or at least one of the monomers and another vinyl (1) which is a copolymer with a series monomer
Or the asphalt roofing felt according to (2). (4) The asphalt roofing felt according to the above (2), wherein the other vinyl monomer is styrene. (5) The asphalt roofing felt according to the above (1), (2), (3) or (4), wherein the anti-slip synthetic resin layer contains a water repellent. (6) The above items (1), (2), (3), wherein the anti-slip synthetic resin layer contains a dye and / or a pigment.
The asphalt roofing felt according to (4) or (5). (7) The particle size of the mineral powder contained in the anti-slip synthetic resin layer is 0.05 to 0.03 mm, preferably 0.1 to 0.2.
mm (1), (2), (3), (4),
(5) or the asphalt roofing felt according to (6). (8) The above items (1), (2), (3), (4), wherein the base material layer made of a nonwoven fabric or a woven fabric is made of a synthetic fiber.
(5) The asphalt roofing felt according to (6) or (7). (9) The above items (1), (2), (3), (4), (5), (6), wherein the base material layer is made of a nonwoven fabric.
The asphalt roofing felt according to (7) or (8). (10) The asphalt roofing felt according to the above (9), wherein the base layer is a nonwoven fabric made of at least one kind of synthetic fiber selected from the group consisting of polyethylene terephthalate, polyamide, polyethylene and polypropylene. (11) The above item (1), wherein the nonwoven fabric or the woven fabric has a water repellency such that, when the antiskid synthetic resin is applied, the antiskid synthetic resin component does not bleed out to the opposite side of the nonwoven fabric or the woven fabric. (2), (3), (4), (5), (6),
(7) The asphalt roofing felt according to (8), (9) or (10). (12) The above items (1), (2), wherein the base material layer is a nonwoven fabric or woven fabric treated by applying a water repellent to the nonwoven fabric or woven fabric at 0.5 to 2.0% by weight. (3), (4),
(5), (6), (7), (8), (9), (10) or (11). (13) The above-mentioned (1), (2), (3), (4), (5), wherein the slip resistance value according to ASTME 303 is 100 or more, preferably 105 or more, particularly preferably 108 or more.
(6), (7), (8), (9), (10), (11)
Or the asphalt roofing felt according to (12). (14) The above items (1), (2), wherein the tear strength is 5 or more, preferably 8 or more, particularly preferably 10 or more.
(3), (4), (5), (6), (7), (8),
(9), (10), (11), (12) or (13)
The asphalt roofing felt described.

[0027]

[Effect] The product of the present invention does not generate free sand at all, so it does not slip and has high work safety. Since the base material layer and the anti-slip synthetic resin layer are provided on the asphalt layer, there is no danger of occurrence of contamination since the asphalt does not seep into the upper layer even in summer. The nail hole sealing property is also superior to the conventional product because the anti-slip synthetic resin layer and the asphalt layer coexist, and the superiority is further improved when a water repellent is used. The tear resistance is much greater than conventional products.

[Brief description of the drawings]

FIG. 1 schematically shows a cross-sectional view of a first product of the present invention.

FIG. 2 schematically shows a sectional view of a second product of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Anti-slip synthetic resin layer 2 Base material layer 3 Asphalt layer 4 Mineral powder layer 5 Self-adhesive layer 6 Release layer

──────────────────────────────────────────────────続 き Continuation of the front page (72) Inventor Hajime Yamazaki 1-3-1 Kodai, Adachi-ku, Tokyo Tajima Roofing Co., Ltd. (56) References JP-A-4-350245 (JP, A) Sho Akai 59-63109 (JP, U) Actual opening 56-174626 (JP, U) (58) Fields investigated (Int. Cl. ⁷ , DB name) E04D 5/10 E04D 12/00

Claims (2)

(57) [Claims] 1. An anti-slip synthetic resin layer containing fine particles, (b) a base layer made of a nonwoven fabric or a woven fabric, (c) an asphalt layer, and (d) a mineral powder layer. Asphalt roofing felt. 2. A lamination in the order of (a) a non-slip synthetic resin layer containing fine particles, (b) a base layer made of a nonwoven fabric or a woven fabric, (c) an asphalt layer, (e) a self-adhesive layer, and (f) a release layer. Asphalt roofing felt that has been made.