JP3125161B2 - Fibrous insulation tarpaulin - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a fibrous heat-insulating waterproof sheet used for lining steel slabs, rooftops, building side walls, etc. of iron bridges.

[0002]

2. Description of the Related Art Conventionally, as an elevated road using a steel slab and an asphalt pavement material, a waterproof sheet is laid after applying a primer on the upper surface of the steel slab, and an asphalt layer is formed on the waterproof sheet. Has been established. As the material of the asphalt layer, a material that melts at a relatively low temperature of 130 ° C. or less has been used.

[0003]

However, with the increase in the traffic volume of automobiles in recent years, the wear and loss of road surfaces have become severe. If the road surface is worn or missing, the operation stability of the vehicle is lost, which may cause an accident. Therefore, it is necessary to repair the road surface regularly, but if the repair work is performed frequently, the operation will be hindered. That is, it is necessary to reduce the number of times of the road surface repair performed in a state where the traffic of the vehicle is blocked or restricted. Therefore, it is required to form an asphalt layer excellent in abrasion resistance and water resistance so that the road surface is not scraped even when many vehicles pass.
In order to meet this demand, a method of providing goose asphalt under ordinary asphalt has been adopted.

[0004] However, goose asphalt has a considerably higher temperature than conventional asphalt, specifically 240-
Used at 260 ° C. in a molten state. When such high-temperature asphalt is lined on a steel slab, the influence of the heat retained by the goose asphalt on the steel slab cannot be ignored. Goose asphalt possesses heat
The steel slab is transmitted to the steel slab through the waterproof sheet, and heats the steel slab to a high temperature. Therefore, thermal deformation and residual stress occur in the steel floor slab. The thermal deformation causes the shape of the steel structure constituting the elevated structure to be twisted. Thermal stress causes the mechanical strength of a steel structure to ignite over a long period of time. Alternatively, in the case of a steel floor slab to which a predetermined mechanical strength has been imparted by heat treatment or the like, an annealing phenomenon occurs due to the retained heat of goose asphalt, which may cause a reduction in the strength of the steel floor slab.

The effect of the heat retained by goose asphalt on the foundation surface is not limited to the problem of lining goose asphalt on steel deck slabs laid over the bridge girder of an iron bridge. To make a heliport, or a work vehicle on the floor in the factory.
This also occurs when constructing a road surface for transport vehicles.
Also, when lining goose asphalt on walls or rooftops, it is necessary to avoid having a thermal effect on the underlying structural material.

Accordingly, the present inventor has proposed a fibrous heat insulating and waterproofing sheet interposed between a base surface and a goose asphalt layer in order to solve such a problem. An object of the present invention is to provide a fibrous heat insulating and waterproofing sheet which can facilitate the handling of the previously proposed fibrous heat insulating and waterproofing sheet and can reduce the cost.

[0007]

According to the present invention, there is provided a fibrous heat-insulating and waterproofing sheet according to the present invention, in which a non-adhesive asphalt layer integrally provided on upper and lower surfaces of a fiber layer made of a nonwoven fabric of inorganic fibers is provided. It is a fibrous heat-insulating waterproof sheet characterized by comprising:

Hereinafter, the present invention will be described in detail. Examples of the inorganic fibers of the present invention include inorganic fibers such as rock wool, glass wool, and ceramic fibers. Rock wool, glass wool, and ceramic fiber can be used alone, but by mixing them, the strength of the fiber layer made of rock wool or glass wool can be improved. As the nonwoven fabric of inorganic fibers, it is preferable to blend and integrate a flexible fibrous binder for the purpose of improving flexibility and handleability. As the fibrous binder resin, a thermoplastic resin such as a PVC-based resin, a styrene-based resin, a polyolefin-based resin, a polyester-based resin, or a nylon-based resin that exhibits tackiness by heating can be used. The use of fibers is more preferred. Further, it is also possible to use a heat-fused fiber obtained by combining a plurality of resins having different softening temperatures.

As a method of integrating these into a fibrous layer, one obtained by defibrating and mixing inorganic fibers and fibrous binder resin is laminated, and then heated and formed into a sheet or felt having a predetermined thickness. Can be used. For example, the felt layer made of the inorganic fiber may be subjected to needling treatment after molding rock wool containing a flexible binder resin into a sheet shape or a mat shape, if necessary, in order to improve peel strength. By heating at this production stage or after production, the adhesive strength of the binder resin is developed, and the inorganic fibers are bonded to each other.

On the upper and lower surfaces of the fiber layer, a non-adhesive asphalt layer is integrated. As the non-adhesive asphalt layer, a known non-adhesive rubber asphalt, bron asphalt or the like having no tackiness is used. Things can be used. However, if bron asphalt is used, it may be broken when it is rolled as a product at low temperature and stored, transported, etc., so synthetic rubber, petroleum resin, the minimum required straight asphalt, etc. It is preferable to prevent cracking by mixing. In addition, in the case where storage and transfer are performed in the form of a roll in this manner, the workability when constructing the steel floor slab, that is, the purpose of preventing adhesion between the layers of the fibrous heat insulating and waterproofing sheet. In addition, it is preferable that sand particles adhere to the surface of the non-adhesive asphalt layer on the upper surface side. As a method of integrating the non-adhesive asphalt layer with the fiber layer, there are a method of spraying molten asphalt on the surface of the fiber layer and a method of coating with a coater. Further, there is a method in which asphalt is previously provided on release paper or the like so as to have a predetermined thickness, and the asphalt layer is pressed against the fiber layer by a roller or the like while heating. Further, a dipping method in which a non-adhesive asphalt film is applied to the surface of the fiber layer by immersing the non-adhesive asphalt in a tank for a short time may be used. In addition, the asphalt layer on the side where goose asphalt is
Inorganic powder can also be mixed. This is because by mixing the inorganic powder, the melting point of the asphalt layer is increased, and the function as a base for goose asphalt is further exhibited. That is, the melting point of asphalt is 70 to 80 ° C., but when the inorganic powder is mixed therein, the melting point rises to 110 to 160 ° C.

The fibrous insulating and waterproofing sheet thus obtained is laid on a steel floor slab to which an asphalt primer has been applied in advance, and a goose asphalt is lined on the upper surface thereof.

[0012]

The nonwoven fabric of inorganic fibers has a large number of voids inside which function as a heat insulating layer. In addition, it is a material with excellent heat resistance and waterproofness, and retains its initial shape sufficiently even when the high-melting goose asphalt is in a molten state, and reliably transfers heat to the base surface forming material such as steel floor slabs. Suppress. for that reason,
Asphalt can be cast without giving adverse effects due to high-temperature heating to steel slabs and the like. In addition, when lining the roof surface or the like, the waterproofness can be improved. Further, when lining goose asphalt on a fibrous heat-insulating waterproof sheet, the heat of the goose asphalt causes the asphalt to fluidize and permeate into the surface layer of the fiber layer. As a result, the asphalt layer and the fiber layer are firmly integrated, and the horizontal shear strength is also increased. Therefore,
The lined goose asphalt is firmly fixed to a base surface such as a steel slab.

[0013]

【Example】

Example 1 Rock wool (S-fiber, manufactured by Nippon Steel Chemical Co., Ltd.)
Was used as a main raw material of the inorganic fiber, and 10% by weight of polyester / polyester heat fusible fiber (Belcombi, manufactured by Kanebo KK) was blended. Then, after forming into a sheet by needling, a heat treatment is performed at a temperature of 160 ° C.
A fiber layer having a thickness of 0 kg / m ³ and a thickness of 2 mm was obtained. Then
A commercially available release paper having a petroleum resin and synthetic rubber-containing bron asphalt layer having a thickness of about 2 mm, and a similar release paper having a bron asphalt layer having the same composition having a thickness of about 0.5 mm formed on the same release paper. Things were manufactured. Roller at 190 ° C
In the state where the asphalt layer was heated, the surface of the asphalt layer was melted and pressed against the upper and lower surfaces of the fiber layer at 1 kg / cm ² , thereby firmly integrating the asphalt layer and the fiber layer. Then, after the release paper on the thick layer side was peeled off, the surface was heated again to soften the asphalt layer, and silica sand particles were sprayed on the surface, and then pressed with a roller. After cooling, the fibrous insulating and waterproofing sheet thus obtained can be separated from the release paper on the thin layer side and wound into a roll. Since the asphalt layer used here is non-adhesive, it is not necessary to form a roll with the release paper adhered, so that the release paper previously used can be used again.

The fibrous heat-insulating waterproof sheet was used for lining goose asphalt on a steel slab, which is the basis of an elevated road. First, a steel floor slab was erected over a supporting structure such as an abutment and a pier, and an asphalt primer was applied to the surface of the steel floor slab. Then, the work vehicle was equipped with a roll-form fibrous heat-insulating waterproof sheet, and the fibrous heat-insulating waterproof sheet was pressed against the upper surface of the steel floor slab by the traveling of the work vehicle and an attached roller.

A goose asphalt in a fluid state heated to 240 to 260 ° C. was lined on the upper surface of the steel floor slab to which the fibrous heat insulating and waterproofing sheet was adhered, thereby forming a goose asphalt layer. At this time, the steel slab was kept at a temperature of about 110 ° C. at the maximum. This indicates that the heat insulating effect of the fibrous heat-insulating waterproof sheet is sufficiently working. Therefore, adverse effects such as thermal deformation did not occur on the steel floor slab.

[0016]

As described above, when lining goose asphalt on a base surface such as a steel floor slab using the fibrous heat insulating and waterproofing sheet of the present invention, the heat retained by the goose asphalt increases the steel floor slab. Of the steel floor slab and the like are not adversely affected. In addition, since the asphalt layer and the fiber layer are firmly integrated by the heat retained by the goose asphalt during lining, it exhibits sufficient strength against horizontal shearing force and firmly fixes the formed goose asphalt layer I do. Moreover, since the fibrous heat-insulating waterproof sheet of the present invention is basically made of an inorganic material such as a mineral,
It exhibits excellent durability and waterproofness without cracking during construction, so even if cracks enter the general asphalt layer or goose asphalt layer, it is waterproofed by the fibrous insulating waterproof sheet of the present invention of the present invention The effect is maintained. So, taking advantage of these features,
It can be used in various fields as a base material for goose asphalt lining on road surfaces for work vehicles and transport vehicles in factories, and for wall surfaces and ceilings, in addition to building road surfaces for elevated roads. Furthermore, a relatively inexpensive material is used as the asphalt layer, and furthermore, it has a remarkable effect on resource saving such as not requiring release paper.

Claims (2)

(57) [Claims] 1. A fibrous heat-insulating waterproof sheet comprising a non-adhesive asphalt layer integrally provided on upper and lower surfaces of a fiber layer made of a nonwoven fabric of inorganic fibers. 2. The fibrous insulating and waterproofing sheet according to claim 1, wherein an inorganic powder is mixed in at least the asphalt layer on the upper surface.