JP2004092357A - Asphalt roofing felt - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To make a roofing material and a roof underlayer material separable easily from asphalt roofing felt without adhesion when demolition work is executed, and to facilitate reuse of a separated under-roofing material and the roof underlayer material without sticking of the asphalt of the asphalt roofing felt. <P>SOLUTION: A resin film layer 1, a mineral powder-grain layer 2, a base material layer 3 infiltrated with asphalt, a covering asphalt layer 4, and a fibrous sheet layer 5 are laminated in sequence to insulate the roofing material and the roof underlayer material from the asphalt of the asphalt roofing felt. <P>COPYRIGHT: (C)2004,JPO

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to asphalt roofing used as an auxiliary waterproofing material for a roofing material of a house.
[0002]
[Prior art]
Conventionally, asphalt roofing, in which asphalt is penetrated into a base material and then coated on both sides with asphalt and mineral powder particles are dispersed to prevent sticking, has been the mainstream. In addition, in order to impart strength, there is also a type in which a fiber sheet is laminated on one side of the above asphalt roofing instead of mineral particles, or a type in which asphalt is sandwiched between two fiber sheets impregnated with asphalt.
[0003]
[Problems to be solved by the invention]
The basic policy of the Construction Recycling Law, which will be fully enforced from May 2002, states that wastes should be separated and dismantled as much as possible to recycle resources. Most of the construction works covered by the Construction Recycling Law are demolition works. Among them, roofing materials such as tiles need to be dismantled by hand in principle, and cost increases are inevitable.
[0004]
In the dismantling of roofing materials, it is relatively easy to remove items that are fixed using piers such as Japanese tiles. However, for nailed items such as slate roofs, heat is applied to the slate roof and asphalt roofing for a long period of time because the asphalt roofing is closely attached to the asphalt roofing, and the asphalt of the asphalt roofing softens and Integrated, making it difficult to remove the slate roof. In addition, asphalt of asphalt roofing adheres to and adheres to the base material of the roof, so that it is more difficult to remove the asphalt, which is troublesome and causes an increase in cost. Even after dismantling, asphalt of the asphalt roofing adheres to and adheres to the slate roof and the base material of the roof, making it difficult to recycle.
[0005]
SUMMARY OF THE INVENTION An object of the present invention is to eliminate all of the drawbacks of the related art, to save the labor for dismantling a roofing material, and to facilitate recycling after dismantling.
[0006]
[Means for Solving the Problems]
Therefore, the asphalt roofing of the present invention is characterized in that a resin film layer 1, a mineral powder layer 2, a base layer 3 impregnated with asphalt, a coated asphalt layer 4, and a fiber sheet layer 5 are sequentially laminated.
[0007]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, embodiments of the present invention will be described in detail. FIG. 1 is a sectional view showing a laminated structure according to an embodiment of the present invention.
[0008]
The waterproof layer 6 is formed by the mineral powder layer 2, the base layer 3 impregnated with asphalt, and the coated asphalt layer 4. On one side, while the asphalt of the base layer 3 impregnated with asphalt has an adhesive property, mineral powder is sprayed on the base layer 3 impregnated with asphalt into the base material. The mineral powder layer 2 is formed thereon, and the resin film layer 1 is formed thereon. On the other side, coated asphalt 4 is coated, and while the coated asphalt 4 has adhesiveness, a fiber sheet is stuck to form a fiber sheet layer 5. At the time of construction, the construction is performed so that the resin film layer 1 is located on the roofing material side, that is, on the roof.
[0009]
As the base material of the base material layer 3 impregnated with asphalt, waste paper such as newspaper, magazine, corrugated cardboard, rugged base paper recycled from cotton, lint, etc., and nonwoven fabric made of synthetic fiber such as polyester are used. These substrates can be used alone or in combination.
[0010]
Asphalt is not particularly limited, and is generally called asphalt, for example, natural asphalt, straight asphalt, blown asphalt specified in JIS K 2207 “Petroleum asphalt”, petroleum asphalt for waterproofing asphalt, or thermoplastic asphalt for asphalt A modified asphalt mixed with a resin and modified can be used.
[0011]
The infiltrated asphalt and the coated asphalt 4 to be penetrated into the base material were obtained by adding 0 to 100 parts by weight of a thermoplastic resin for asphalt modification and 0 to 100 parts by weight of an inorganic filler to 100 parts by weight of asphalt and then mixing them uniformly. Use things. These asphalts can be used alone or as a mixture of two or more. As the asphalt and the coated asphalt 4 to be penetrated into the base material, the same type of asphalt or a different type of asphalt may be used.
[0012]
Asphalt modifying thermoplastic resins include polyolefin, polyvinyl chloride, nylon, ethylene / vinyl acetate copolymer, ethylene / acrylic acid copolymer, ethylene / methyl acrylate copolymer, ethylene / ethyl acrylate copolymer Coalescence, styrene-butadiene copolymer, natural rubber, natural rosin, modified rosin, etc. can be used.In particular, in consideration of waterproofness, cost, and productivity, it is possible to use styrene-butadiene copolymer. preferable.
[0013]
The type of inorganic filler is not particularly limited, but mica, clay, talc, diatomaceous earth, silica sand, pumice powder, etc. can be used, and these may be used alone or in combination of two or more. Can be. Particularly, considering cost and productivity, it is preferable to use calcium carbonate, calcium bicarbonate, and talc.
[0014]
As the mineral powder layer 2, kaolin, silica sand, diatomaceous earth, talc, fluorite or the like can be used.
[0015]
The method of forming the resin film layer 1 includes a method of applying and drying a synthetic resin emulsion on the mineral powder layer 2, and a method of melting, coating and cooling a thermoplastic resin by heat.
[0016]
It is a synthetic resin emulsion, but is not particularly limited. For example, acrylate, styrene / acryl, vinyl acetate, ethylene / vinyl acetate, and the like can be used alone or in combination. The amount of the resin applied is preferably 30 to 300 g / m ² in a dry state. If the amount is less than this, a sufficient layer cannot be formed, and if the amount is too large, it takes a long drying time in production and the cost is increased. By adding a pigment to the synthetic resin emulsion in advance, the asphalt roofing surface is colored and has a design property. It is also possible to mix an inorganic powder such as calcium carbonate or silicon dioxide with the synthetic resin emulsion for the purpose of increasing the amount.
[0017]
As the thermoplastic resin, polyolefin, ethylene / vinyl acetate copolymer, styrene / butadiene copolymer, natural rosin, modified rosin and the like can be used alone or in combination. In particular, it is preferable to use a polyolefin. The amount of the resin applied is preferably 30 to 300 g / m ² in a dry state. If the amount is less than this, a sufficient layer cannot be formed, and if the amount is too large, a cooling time is required in the production and the cost is increased. By adding a pigment to a previously melted thermoplastic resin, the asphalt roofing surface is colored and has a design property. It is also possible to mix an inorganic powder such as calcium carbonate or silicon dioxide with the molten thermoplastic resin for the purpose of increasing the amount.
[0018]
This is a method for forming the fiber sheet layer 5, and is applied when the coated asphalt 4 has adhesiveness, that is, when the surface temperature of the coated asphalt 4 is 60 ° C. or higher. As the fiber sheet, various materials such as nonwoven fabric, felt, woven fabric, and paper can be used. Preferably, creped kraft paper or nonwoven fabric is preferred.
[0019]
A comparative test was performed between the asphalt roofing according to the present invention and the conventional asphalt roofing.
[0020]
Regarding the product 1 of the present invention, blown asphalt 10 to 20 is infiltrated into a polyester nonwoven fabric having a basis weight of 100 g / m ² , and in a state where the infiltrated asphalt has adhesiveness, silica sand is sprinkled on one side, and An acrylic resin-based emulsion containing an acrylate as a main component and having a nonvolatile content of 45% was applied at 100 g / m ² and completely dried. The other side was coated with coated asphalt in which 100 parts by weight of blown asphalt 10 to 20 and talc were uniformly mixed at a ratio of 20 parts by weight, and a creped kraft paper having a basis weight of 78 g / m ² was stuck. used.
[0021]
Regarding the product 2 of the present invention, blown asphalt 10 to 20 is infiltrated into a polyester nonwoven fabric having a basis weight of 100 g / m ² , and in a state where the infiltrated asphalt has an adhesive property, silica sand is sprinkled on one side, and A melted thermoplastic resin whose main component was an ethylene / vinyl acetate copolymer resin was applied thereon at 50 g / m ² , and completely cooled. The other side was coated with coated asphalt in which 100 parts by weight of blown asphalt 10 to 20 and talc were uniformly mixed at a ratio of 20 parts by weight, and a creped kraft paper having a basis weight of 78 g / m ² was stuck. used.
[0022]
About the product 3 of the present invention, a modified asphalt obtained by uniformly mixing 100 parts by weight of straight asphalt 60 to 80 parts and a styrene / butadiene copolymer in a ratio of 20 parts by weight is permeated into a polyester nonwoven fabric having a basis weight of 100 g / m ^2. In a state where the infiltrated asphalt has an adhesive property, silica sand is sprinkled on one side, and 50 g / m ^{2 of} a melted thermoplastic resin whose main component is an ethylene / vinyl acetate copolymer resin is placed thereon. Coated and allowed to cool completely. The other side is coated with coated asphalt in which 100 parts by weight of straight asphalt 60 to 80 and styrene / butadiene copolymer are uniformly mixed at a ratio of 20 parts by weight, and a creped polyester nonwoven fabric having a basis weight of 25 g / m ² is coated. The thing which stuck was used.
[0023]
As a comparative product, coated asphalt in which straight asphalt 60 to 80 was infiltrated into a rug base paper having a basis weight of 200 g / m ² , and 100 parts by weight of blown asphalt 10 to 20 and talc were uniformly mixed at a ratio of 20 parts by weight. Coated. In a state where the coated asphalt has an adhesive property, a material coated with silica sand on both surfaces was used.
[0024]
As a comparative test, an adhesion resistance test at a high temperature was performed. Plywood cut into a 10 cm square and a 10 kg weight were placed on the asphalt roofing and left in a constant temperature bath at 70 ° C. for 3 hours to check whether the asphalt roofing and the plywood were peeled off.
As a result, asphalt was found to adhere to the plywood on both surfaces of the synthetic resin layer 1 composed of the dried acrylic resin emulsion and the fiber sheet 5 composed of creped kraft paper having a basis weight of 78 g / m ² with respect to the product 1 of the present invention. Did not. With respect to the product 2 of the present invention, both surfaces of a synthetic resin layer 1 made of a thermoplastic resin whose main component is an ethylene-vinyl acetate copolymer resin and a fiber sheet 5 made of creped kraft paper having a basis weight of 78 g / m ² are plywood. No asphalt adhesion was observed. With respect to the product 3 of the present invention, both surfaces of a synthetic resin layer 1 made of a thermoplastic resin whose main component is an ethylene-vinyl acetate copolymer resin and a fiber sheet 5 made of a creped polyester nonwoven fabric having a basis weight of 25 g / m ² are plywood. No asphalt adhesion was observed. However, the comparative product was found to adhere to the plywood and could not be peeled off.
[0025]
【The invention's effect】
The product of the present invention comprises a resin film layer 1, a mineral powder layer 2, a base material layer 3 impregnated with asphalt, a coated asphalt layer 3, and a fiber sheet layer 5 sequentially laminated. The roofing material is insulated by the resin film layer 1, and the roof base material is insulated by the fiber sheet layer 5, the powdery and granular layer 2, the base layer 3 impregnated with asphalt, and the coated asphalt layer 3. Therefore, even if the asphalt of the asphalt roofing and the roofing material and the roof base material do not adhere to each other, they do not adhere to each other, so that they can be easily separated and collected at the time of demolition work. Since there is no asphalt roofing adhered to the material and the roof base material, there is an effect that the resources can be easily recycled.
[Brief description of the drawings]
FIG. 1 is a sectional view showing a laminated structure according to an embodiment of the present invention.
FIG. 2 is a cross-sectional view showing a laminated structure of a conventional product used for comparison.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Resin film layer 2 Mineral powder layer 3 Base layer impregnated with asphalt 4 Coated asphalt layer 5 Fiber sheet layer 6 Waterproof layer

Claims (1)

Asphalt roofing comprising a resin film layer 1, a mineral powder layer 2, a base layer 3 impregnated with asphalt, a coated asphalt layer 4, and a fiber sheet layer 5 sequentially laminated.

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