JP2552288B2 - Base material for nailing and fixing building surface materials - Google Patents

Description

[Detailed Description of the Invention] [Industrial application] The present invention is for nailing and fixing a building surface material to be laid between a structural body of a building and a surface material such as a roof material, a floor material or a wall material. Regarding base materials.

[Conventional technology]

As a base material for building surface materials, for example, as a base material for roofs, conventionally, in the case of wooden construction, an asphalt roofing is laid on a base plate, and roof materials such as tiles are placed on it. In the case of the construction method, it is possible to fix nail tiles to the base plate by fixing nails, but the base plate rots due to moisture, and the roofing also condenses due to moisture, resulting in low reliability of waterproofing. or,
When arranging roof tiles in concrete construction or ALC construction, there is no corrosion due to moisture, but nailing is not possible and it is not waterproof. Even in the case of mortar that can be nailed (for example, sky mortar), after asphalt roofing is laid, the tiles are nailed and mounted, but it requires a training period of about one week after the nailing, and the pull-out retention force of the nails However, there are many problems such as the need to attach timber to the timber on the timber at the eaves and to fix the drawbacks.

The present invention has been made in view of the above problems.
Its purpose is to propose a base material for nailing and fixing a surface material of a building, which is excellent in waterproof property and has a high nail pull-out retention force.

[Structure of Invention]

This nailing fixing base material for the building surface material is a building base material to be laid between the structural frame of the building and the surface material, and the base material is a base material mainly composed of asphalt and 8.8
-40% by weight of reinforcing short fibers are uniformly dispersed and mixed, and the short fibers are oriented in a plane parallel to the asphalt layer, and have a solid asphalt layer having a thickness of 3 mm or more. Characterize.

The asphalt used for this base material includes solid or semi-solid blown asphalt (eg, penetration (JIS.K2530) 10 to 20) that is elastic at room temperature, rubber asphalt (eg, penetration 40 to 100), gilsonite. (For example, a penetration of 0), improved asphalt mixed with a synthetic resin or the like is used. A wide variety of substances can be added to these asphalts according to their physical properties and purposes. For example, by adding inorganic powder such as calcium carbonate, synthetic resin powder such as ethylene vinyl acetate resin foam or rubber tire powder, the asphalt base material is provided with physical properties such as elasticity and hardness suitable for use conditions.

As the reinforcing short fibers to be mixed with the base material mainly composed of asphalt, cotton linter (fiber length 2 to 15 mm), natural fiber such as coarse cotton, polyester fiber, polypropylene fiber (for example, fineness 1 to 5 denier, fiber length 2) ~ 15mm) synthetic fibers such as asbestos and inorganic fibers are used. These fibers have a short fiber length, usually 20 mm or less, and are uniformly dispersed in a molten asphalt base material, and then formed into a solid asphalt layer having a thickness of 3 mm or more.

The amount of the reinforcing fibers to be mixed is selected from the range in which the fibers and the base material are homogeneously mixed and a dense structure is formed. If the ratio of the fibers is too large, the amount of the base material filling the spaces between the fibers is insufficient, and it is not possible to form an asphalt layer having a dense structure. On the other hand, if the amount is too small, the force for restraining the base material is insufficient, and the pullout holding force of the nail cannot be increased. The ratio of short fibers to the formed asphalt layer is affected by the density, bulkiness, asphalt fluidity, hardness, type and amount of additives, etc., but should be in the range of 8.8-40% by weight. is necessary.

The thickness of the asphalt layer should be 3 mm or more. If it is less than 3 mm, the layer for holding the nail is too thin to have a high pull-out holding force. The thicker the thickness, the higher the pull-out holding force, but thickening beyond the nail driving depth only makes the base material heavier, so the thickness of this asphalt layer is usually thicker. Is about 30 to 40 mm or less. The preferable thickness is about 5 to 20 mm.

Asphalt layer is usually formed by feeding a certain amount of molten asphalt matrix mixed with short fibers onto a running substrate (film, nonwoven fabric, release paper, etc.) from a slit die. It is carried out by a method of continuously coating, a method of continuously coating a running substrate while adjusting the thickness with a doctor knife, or a method of using both of them together. (After molding, the base material is peeled off if necessary.) In this molding process, the molten asphalt base material is constrained by a doctor knife or slit die and flows, and the short fibers in the base material flow in the base material. It is oriented in the same direction, and is oriented in the plane direction parallel to the asphalt layer (that is, in the image direction). In this way, the short fibers oriented in the base material strongly restrain the asphalt layer in the in-plane direction, improving the pull-out retention force of the nails driven into the asphalt layer,
It greatly contributes to the increase of the in-plane strength of the asphalt layer.

The reinforcing short fibers are uniformly dispersed and mixed in the asphalt base material, and the short fibers are oriented in the in-plane direction of the asphalt layer, so a dense asphalt layer can be used as a base material on the mask, but usually Is a non-woven fabric, woven fabric,
Film, aluminum foil, paper, thin wood sheets (plywood),
Alternatively, a wire net or the like is laminated and used. By laminating these materials on the surface, it is possible to prevent the occurrence of damage such as dimensional change due to drying or shrinkage, cracking, fatigue, and rupture.
Nonwoven fabrics, especially spunbond nonwoven fabrics (particularly polyester fibers), have excellent heat resistance, dimensional stability, and processability when forming molten asphalt to form an asphalt layer, and adhere well to the asphalt layer to protect the coating. And,
It is suitable because it is low in cost and easy to handle.

[Work]

This base material is a solid or semi-solid elastic asphalt-based base material mixed with reinforcing short fibers and oriented in the in-plane direction.
Since it has an asphalt layer of m or more, this base material can be laid as a base on a concrete or wooden building frame, and roofing materials such as tiles or surface materials such as floor materials can be nailed and installed. Demonstrates a strong nail pullout holding force. At the same time, the asphalt layer is resistant to cracking, has high reliability in waterproofing, and has functions such as sound insulation, heat insulation, and shock absorption.

A base material in which a spunbonded nonwoven fabric (particularly of polyester fiber) is laminated on the surface of an asphalt layer is suitable because damage such as dimensional change, cracking and rupture is less likely to occur.

〔Example〕

The asphalt mixture with the composition shown in Table 1 is melted by heating and supplied to the surface of polyester fiber spunbond woven fabric (unit weight, 50 g / m ² ), and a 10 mm thick asphalt layer is formed by the doctor knife coating method. Nonwoven fabrics were laminated and laminated to produce a base material 3 in which nonwoven fabrics 2 and 2 were laminated on both sides of an asphalt layer 1 shown in the drawing. At the same time 1st
The base materials of Comparative Examples 1 and 2 shown in the table were manufactured under the same conditions as above, and the pull-out holding force of the nail was measured.

The pull-out holding force of the nail is 45 mm long on the base material 3 and the ring-shaped ridge 4
Nailed the nail 5 overhanging on many sides to a length of 36 mm.
Grip the nail head in an atmosphere of 20 ° C and 65% RH to obtain 20mm /
The tension was measured at a speed of minutes.

In addition, none of the base materials was water-permeable in a water-permeable test for 10 minutes at a water pressure of 10 kg / cm ² .

〔The invention's effect〕

The present invention is as described above. This base material has the following effects.

It can be laid on the skeleton of a concrete or wooden building, and roofing materials such as roof tiles and flooring can be attached by nailing.

At the same time, it exhibits functions such as waterproofness, sound insulation, heat insulation, and shock absorption.

[Brief description of drawings]

The drawing is a vertical cross-sectional view of a state where a nail is driven into the base material of the embodiment. 1 ... Asphalt layer, 2 ... Nonwoven fabric, 3 ... Base material,
4 ... ridges, 5 ... nails.

Claims (2)

(57) [Claims] 1. A building base material to be laid between a structural body of a building and a surface layer material, wherein the base material is a base material mainly composed of asphalt and 8.8 to 40% by weight of reinforcing short fibers. For nailing fixing of building surface materials, characterized by having a dense asphalt layer with a thickness of 3 mm or more in which the short fibers are dispersed and mixed in a plane direction parallel to the asphalt layer. Base material. 2. A base material for nailing and fixing a building surface material according to claim 1, wherein the asphalt layer has a non-woven fabric laminated on the surface thereof.