JPS62153174A - Glass fiber mat heat insulator for construction material - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a glass fiber mat heat insulating material for building materials that is nonflammable, shows little change in heat insulating properties over time, and has excellent mechanical strength and stability.

[Conventional technology]

Conventionally, glass fiber insulation materials for building materials have been known, and these insulation materials can be laminated with metal plates and bent into a predetermined shape, or laminated onto metal folded plates that have been bent and formed into a predetermined shape in advance. These are used as folded metal roofing sheets, respectively. In order to prevent the glass fiber mat from breaking or wrinkling at the bending portion during the bending process, attempts have been made to laminate synthetic fiber non-woven fabric or the like. Specifically, for example, Japanese Patent Application Laid-Open No. 57-1889 discloses that a laminate of an inorganic fiber mat such as glass fiber and an endless organic fiber nonwoven fabric is needle-punched from the nonwoven fabric side. A plunget for metal folded roofs is proposed in 1, in which glass fibers (fibers and organic imitations) are intertwined with each other, and a resin coating is formed on the surface of the stepped fiber nonwoven fabric side.
Publication No. 135189 discloses a sheet-like product in which glass fibers and machine fibers are mixed, and the glass fibers or organic fibers are forcibly arranged in the thickness direction over the entire surface of the sheet-like product. A heat insulating material for metal folding plates has been proposed in which fibers in a sheet-like material are partially adhered to each other by an adhesive dispersed in the sheet-like material. Furthermore, JP-A-58-186649 describes a sheet-like material in which glass fibers are mixed with composite fibers made of machine fibers and hot-melt adhesives, which are needle-punched in the thickness direction. In addition, a heat insulating material has been proposed in which the composite fibers and glass fibers or the composite fibers are thermally bonded to each other by heat treatment.

However, in the glass fiber insulation material described in JP-A-57-7889, the resin coating formed on the surface of the nonwoven fabric increases the frictional resistance of that surface, so wrinkles may occur during folding molding. There is a problem in which this is likely to occur, and furthermore, as with the inventions of Japanese Patent Application Laid-Open No. 58-135189 and Japanese Patent Application Laid-Open No. 58-186649, including this invention,
Insulating materials made by simply bonding glass fibers with adhesive or heat-sealable fibers do not have sufficient fixation of the intertwined structure of the glass fiber layers with the constituent fibers of the organic nonwoven fabric (and do not provide stable mechanical strength). When an adhesive is applied, there is a problem in that the flexibility of the heat insulating material is reduced, leading to a decrease in workability.

[Problem to be solved by the invention]

The purpose of the present invention is to solve the above problems,
The glass fiber layer is entangled with the constituent fibers of the nonwoven fabric, and the nonwoven fabric fibers attached to the glass fiber mat layer are bonded and fixed to the glass fiber mat surface with an adhesive, so that the entangled structure of the glass fiber mat layer is substantially changed. An object of the present invention is to provide a heat insulating material that is fixed in position, has stable mechanical strength, and has improved flexibility.

[Means for solving problems]

The object of the present invention is to provide a heat insulating sheet made of a synthetic fiber nonwoven fabric and a glass fiber mat, in which the fibers constituting the synthetic fiber nonwoven fabric penetrate and entangle the glass fiber mat layer,
This can also be achieved by using a glass fiber mat heat insulating material for building materials in which an adhesive layer is provided on the surface of the glass fiber mat through which the constituent fibers of the synthetic nonwoven fabric pass.

The figure shows a glass fiber mat heat insulating material for building materials as an example of the present invention, where ■ is a glass fiber mat, 2 is a synthetic fiber nonwoven fabric, and 3 is an adhesive layer. The synthetic fiber nonwoven fabric 2 penetrates the glass fiber mat 1 through needle-punched through holes 4 and protrudes to the opposite surface, and the protruding portion 1a is bonded and fixed by the adhesive layer 3. There is.

The glass fiber mat constituting the heat insulating material of the present invention has a thickness of 5 to 15 microns and is obtained by the Gyleft melt method or the marble melt method using various known glass fibers such as inorganic alkali glass (E glass) as raw materials. (μ), preferably 5-10μ, length 30-! , 50
An example is one made of am glass fiber.

Of course, a glass fiber mat mixed with rock wool or other mineral fibers may also be used.

This glass fiber mat has a fineness made of a hot melt type polymer such as a low melting point polymer such as ethylene-vinyl acetate copolymer, polyethylene, modified polyethylene, modified polypropylene, copolyamide, copolyester modified polyvinyl alcohol, etc. After mixing heat-fusible fibers having a denier (d) of 1 to 10 and a length of 30-150 am, the heat-fusible fibers are melted to mutually bond the glass fibers constituting the glass fiber mat. , thereby increasing the dimensional stability and strength of the glass fiber mat layer and, as a result, of the insulation material.

Examples of nonwoven fabrics include various known fibers, such as polyolefin fibers such as polyethylene and polypropylene, polyamide fibers, polyester fibers, polyacrylonitrile fibers, and chlorine-containing polymer fibers such as polyvinyl chloride and polyvinylidene chloride. fineness of 1 to 10
There are nonwoven fabrics made by using endless denier fibers, either singly or in combination of two or more, and formed by a wet method, a dry method, a spunbond method, etc., but preferably by a spunbond method. A soft non-woven fabric with a small fineness is preferable.

The basis weight of this nonwoven fabric is preferably 10 to 60 g/rrr. If this basis weight is less than 10 g/rrr, it will be difficult to effectively entangle the glass fiber mat layer by needle ring, which will be described later. If m' is exceeded, the fibers constituting the nonwoven fabric are likely to be cut by the needle ring, and it becomes difficult to sufficiently penetrate the fibers constituting the glass fiber mat to the opposite side of the needle ring, which is not preferable.

The protruding length of the fibers on the surface penetrating the glass fiber mat layer is preferably within the range of 5 to 20 mm, and if this length is less than 51 mm, the glass fiber mat layer is fixed due to entanglement. is not sufficient, and if the protruding length exceeds 20, there is virtually no difference in the technical effect.

The nonwoven fabric fibers that have penetrated the glass fiber mat layer are bonded and fixed to the glass fiber mat surface by an adhesive layer that has adhesive properties to the nonwoven fabric fibers.

This adhesive layer may be sufficient as long as it can bond and fix the nonwoven fabric fibers that penetrate through it, but as a metal folded roof sheet material, it is preferable to provide a metal plate on this adhesive layer.

As a method for producing such a glass fiber mat insulation material for building materials of the present invention, the above-mentioned glass fiber pine 1- and a nonwoven fabric containing or not containing heat-sealable fibers are laminated, and needle punching is performed from the laminated surface of the nonwoven fabric. The glass fiber mat layer is entangled with the nonwoven fabric constituent fibers, and the glass fiber mat and nonwoven fabric are integrally laminated.

In all cases, needle punching requires that the fibers of the nonwoven fabric be needled through the fiberglass mat on the opposite side of the glass fiber mat to be needled.

The heat insulating material of the present invention is obtained by adhesively fixing the nonwoven fabric constituent fibers protruding to the opposite surface by this needling with an adhesive.

Of course, if a non-woven fabric mixed with a heat-fusible adhesive is used, heat treatment can be performed after needling, before or after applying the adhesive, to melt the heat-fusible fibers in the non-woven fabric. , the glass fibers of the glass fiber mat layer are bonded with the heat-sealable fiber-constituting polymer.

If a metal plate is bonded to at least one surface of the thus obtained heat insulating material of the present invention, it can be used as a blanket for metal plate roofing. When used as this metal folded roof sheet material, the metal plate is preferably bonded to the adhesive coating layer of the laminate.

〔Effect of the invention〕

According to the present invention, when bending and forming into a predetermined shape as a heat insulating material for folded metal roof panels, there is no possibility of breakage at the bending part or formation of wrinkles around the bending part, and there is no possibility that the material will adhere to the nonwoven fabric surface. Since no agent is present, the effect is that the frictional resistance of the nonwoven fabric surface is not impaired.

Hereinafter, the present invention will be specifically explained with reference to Examples.

Example 1 A glass fiber mat with a diameter of 10 μ, a length of 30 to 10011 m, and a thickness of 50 m has a fineness of approximately 1.5 to 2.0 and a basis weight of 42 g.
/c[lI long-fiber nonwoven fabrics created by the spunbond method were laminated and needled at 17 sts/Cl11 using a needling machine, so that about 9 fins of nonwoven fabric constituent fibers were protruded from the opposite side to the needling side. After that, an acrylic acid ester emulsion was applied as an adhesive to the surface where the fibers constituting the nonwoven fabric protruded, and it was dried at 120°C to create a heat insulating material with a bulk density of 0.12 g/cr& and a thickness of about 5 Ill. .

A galvanized iron plate with a thickness of 0.6 mm was bonded to the adhesive-applied surface of this insulation material using a chloroprone adhesive and roll-formed into a predetermined shape, but no breaks or wrinkles occurred at the bent portion. .

[Brief explanation of drawings]

The figure is a longitudinal sectional view of a glass fiber mat heat insulating material for building materials, which is an example of the present invention. 1...Glass fiber mat, 2...Synthetic fiber nonwoven fabric,
3...Adhesive layer.

Claims (3)

[Claims] (1) In a heat insulating sheet made of a synthetic fiber nonwoven fabric and a glass fiber mat, the fibers constituting the synthetic fiber nonwoven fabric penetrate and entangle the glass fiber mat layer, and the fibers constituting the synthetic fiber nonwoven fabric penetrate the glass fiber mat surface. Glass fiber mat insulation material for building materials with adhesive layer. (2) A glass fiber mat heat insulating material for building materials according to claim 1, wherein the glass fibers constituting the glass fiber mat layer are joined by heat-fusible fibers. (3) A glass fiber mat insulation material for building materials according to claim 1 or 2, wherein a metal plate is laminated and pressed on at least one surface of the glass fiber mat insulation material.