JPH0914578A - Foamed polystyrene heat insulating material and execution method therefor - Google Patents

Abstract

PURPOSE: To facilitate manufacture and to attain mass production, by forming an acrylic emulsion bed layer in only an external surface or in internal/external surfaces of a foamed polystyrene heat insulating material, and applying a coating onto this bed layer. CONSTITUTION: A foamed styrene heat insulating material 1 is formed into a cylindrical shape, to comprise half cylindrical two divided units 2, 2. Each divided unit 2 is a molded product by metal molding of foamed polystyrene, and formed with an acrylic emulsion bed layer 3 in an external surface and with a coating layer 4 on this bed layer. A pressure sensitive adhesive agent is applied to a contact surface 5 of the divided units 2, 2. Till applying execution work to the divided unit 2, a pressure sensitive adhesive agent layer is coated with mold releasing paper. This foamed polystyrene heat insulating material 1 can be manufactured by only coating a polystyrene surface, to facilitate manufacture. By providing the coating layer 4 and the acrylic emulsion bed layer 3, the material has water-vapor permeability resistance equal to or more of fixing ALGC, to prevent interal dewing.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a styrofoam heat insulating material formed in a predetermined shape so as to cover equipment, pipes and the like.

[0002]

2. Description of the Related Art Hot water, cold water, refrigerant, water supply, drainage, etc. of straight pipes, elbows, cheese, valves, etc.
For protection and the like, these devices and pipes are covered with styrofoam insulation.

This styrofoam heat insulating material is composed of a plurality of divided bodies which are divided into two or more parts, and the outer surfaces of equipment, pipes and the like are covered by the plurality of divided bodies.
When mounting to equipment, piping, etc., temporarily fasten these divided bodies together and then wind tape or the like.

A sheet of ALGC (aluminum glass cloth) or the like may be attached as an exterior material to the outer surface of the styrofoam heat insulating material.

[0005]

The conventional styrofoam heat insulating material has the following problems.

[0006] In the case of a styrene foam heat insulating material having a sheet such as ALGC attached thereto, it takes a lot of time to manufacture and cannot be mass-produced.

If a sheet such as ALGC is not attached, the moisture permeation resistance is low and internal dew condensation easily occurs.

In order to increase moisture permeability resistance, suppress internal dew condensation, prevent deterioration due to ultraviolet rays, and further improve aesthetics, it is desired to coat the outer surface of the Styrofoam insulation with a solvent. Because the styrene melts, the usable paints were limited.

When welding sparks are applied at a construction site, through holes are formed, and the heat insulation performance is significantly reduced. In addition, there is a risk of burning.

It takes a lot of time to temporarily fix the divided bodies together during the construction.

[0011]

A styrofoam insulation material according to claim 1 is a styrofoam insulation material molded to cover equipment, pipes, etc., and is a plurality of divided bodies divided into two or more parts. In a styrofoam insulation material that is combined, only the outer surface of the styrofoam insulation material,
Alternatively, it is characterized in that an acrylic emulsion base layer is formed on the inner and outer surfaces, and coating is applied thereon.

According to a second aspect of the invention, the styrofoam heat insulating material is characterized in that, in the first aspect, a pressure-sensitive adhesive that can be peeled off and redeposited is applied to the contact surface between the divided bodies.

The method for applying the styrofoam insulation material according to claim 3 is the method for applying the styrofoam insulation material according to claim 1, wherein a pressure-sensitive adhesive or an adhesive is applied to the contact surfaces of the divided bodies at the construction site. It is characterized by being constructed.

[0014]

[Function] When an acrylic emulsion base layer is formed on the outer surface, the surface of the styrofoam insulation will be slightly recessed or have a slight mark even if sparks from welding are applied, and no through holes or deep holes are formed. Was confirmed.

Further, by forming an acrylic emulsion-based underlayer, it is possible to apply various paints such as silver to the underlayer. Even if a solvent-based paint is used, the acrylic emulsion base layer prevents the styrene from being dissolved. By forming this paint layer, deterioration of styrene due to ultraviolet rays is prevented. Further, by forming the paint layer and the acrylic emulsion-based underlayer, the moisture resistance becomes significantly high.

When the same acrylic emulsion-based underlayer or the paint layer and the acrylic emulsion-based underlayer are formed on the inner surface, the moisture permeation resistance is further increased as compared with the outer surface alone.

Since the Styrofoam insulation of the present invention is surface-coated as described above, it is remarkably easy to manufacture as compared with the case where a sheet such as ALGC is attached.

Further, in the present invention, by attaching the adhesive to the contact surfaces of the divided bodies, the divided bodies can be connected only by bringing the divided bodies into contact with each other, and temporary fastening is extremely performed. It's easy. Moreover, even after the temporary fixing with the adhesive, the divided bodies can be peeled off to adjust the positional deviation, and then the divided bodies can be connected again.

Of course, in the present invention, it is also possible to apply a pressure sensitive adhesive (for example, a sealing agent) or an adhesive to the abutting surface of the divided body at the construction site to carry out the styrofoam insulation.

At the time of installing the heat insulating material, a cushioning sealing agent that absorbs expansion and contraction of the heat insulating material is used at the joint between the heat insulating materials, and the outer periphery thereof is a vinyl tape or ALGC tape having the same color as the paint. By winding, the connection part can be strengthened.

[0021]

Embodiments of the styrofoam insulation of the present invention will be described in detail below with reference to the drawings.

FIG. 1A is a sectional view showing an example of the styrofoam heat insulating material 1 according to the embodiment, and FIG. 1B is an enlarged sectional view of the surface portion.

The styrofoam heat insulating material 1 has a cylindrical shape and is composed of two semi-cylindrical divided bodies 2 and 2. Each of the divided bodies 2 is a styrene foam mold product, and has an acrylic emulsion base layer 3 formed on the outer surface thereof, and a coating layer 4 formed thereon. Abutment surface 5 of the divided bodies 2 and 2
An adhesive is applied to the. The adhesive layer is covered with release paper until the divided body 2 is used for construction.

However, in the present invention, this adhesive may be applied at the construction site as described above, and in this case, release paper is not necessary.

The composition for forming the acrylic emulsion base layer 3 is as follows: 20 to 40% by weight of coloring / extensive pigment, 40 to 60% by weight of acrylic emulsion resin varnish, 3 to 10% by weight of additive, and 5 to 5% of water. 15% by weight is preferred. This composition is applied to the surface of the divided body 2 by means such as spraying or brush application. As the pigment, titanium, calcium carbonate, talc, etc. can be used. As the additive, a defoaming agent, an anti-repellent agent, a desiccant or the like is used.

It is preferable that the surface of the divided body 2 is blown with air prior to this coating. After coating the base layer 3, it is dried at about 40 to 60 ° C. for about 20 to 30 minutes.
The underlayer 3 is preferably formed in two layers having a thickness of about 70 to 100 μm.

As the paint layer 4 to be applied on the underlayer 3, a water-soluble acrylic paint (silver), a solvent acrylic paint (other than silver), a water-soluble alkyd paint (other than silver), a solvent alkyd paint (silver). And the like, and the coating method is arbitrary such as brush coating and spraying.

Suitable examples of the alkyd paint include 10 to 20% by weight of coloring and extender pigment, 70 alkyd resin varnish.
~ 80% by weight, additive 2-6% by weight, solvent 3-6% by weight
Is mentioned.

The paint layer 4 preferably has a thickness of about 30 to 60 μm.

The Styrofoam heat insulating material constructed in this manner is such that the surface thereof is slightly recessed or slightly marked even if sparks of welding are applied, and it is recognized that no through hole or deep hole is formed. Was given.

The reason for this is not clear, but it is presumed that the acrylic emulsion-based underlayer exhibits some heat resistance.

As a result of various experiments, it was found that the spark resistance was remarkably improved by forming two or more acrylic emulsion base layers.

It was also confirmed that the provision of the base layer 3 and the coating layer 4 prevents the styrene from being deteriorated by ultraviolet rays.

This styrofoam heat insulating material 1 can be manufactured by simply coating the styrene surface, and is extremely easy to manufacture. Further, since the paint layer 4 and the acrylic emulsion-based underlayer 3 are provided, it has a moisture permeation resistance equal to or higher than that of the one to which ALGC is attached, and internal dew condensation is surely prevented.

This styrofoam heat insulating material 1 has a contact surface 5
Since the adhesive is attached to the divided bodies 2, 2, the divided bodies 2, 2 can be connected to each other only by bringing the divided bodies 2, 2 into contact with each other. Therefore, temporary fixing is extremely easy.

Further, even after temporarily fixing with an adhesive,
After separating the split bodies 2 and 2 and adjusting the positional deviation,
The divided bodies 2 and 2 can be connected again.

At the time of this construction, the joint can be strengthened by applying (or sticking) sealing to the joint.

In the present invention, as in the conventional construction method, a pressure sensitive adhesive or an adhesive may be applied to the contact surface of the styrofoam heat insulating material 1 at the construction site for construction.

In the present invention, as the pressure-sensitive adhesive, an acrylic emulsion-type pressure-sensitive adhesive and a styrofoam sealing agent are preferable, and among them, a butyl rubber-based sealing agent is particularly preferable. The amount of adhesive applied is 0.01 to
About 0.03 g / cm ² is preferable. The use of the sealing agent improves the airtightness and watertightness of the contact surface.

As the adhesive, an adhesive commercially available for Styrofoam, for example, a vinyl acetate adhesive is suitable. Adhesive amount is 0.005-0.02g / cm
^{About 2} is preferred.

Specific examples will be described below. After air-blowing a styrofoam half cylinder made of beaded polystyrene foam having an inner diameter of 27.2 mm and an outer diameter of 67.2 mm in the shape shown in FIG. 1, 30% by weight of pigment and 50% by weight of acrylic emulsion resin varnish on the outer peripheral surface. ,
Apply a mixture of 7% by weight of additive and 13% by weight of water,
The first underlayer having a thickness of 80 μm was formed by drying at 25 ° C. for 25 minutes. Further, by applying the same formulation on this in the same manner and drying, a second layer having a thickness of 80 μm is obtained.
An underlayer was formed.

Titanium, calcium carbonate and talc were used as pigments, and defoaming agents, repellants and desiccants were used as additives.

Next, on this base layer, 15% by weight of pigment, 75% by weight of alkyd resin varnish, 5% by weight of additive,
An alkyd paint containing 5% by weight of a solvent was applied by a spray method and then dried to form a paint layer having a thickness of 45 μm. An aluminum paste was used as the pigment, a defoaming agent, a repellent and a desiccant were used as the additives, and water was used as the solvent.

An arc welding spark was blown at a distance of 20 cm above the styrofoam insulation material produced in this manner for 30 seconds. As a result, the painted surface which was hit by the spark showed a slight discoloration, but no through hole or deep hole was formed.

A butyl rubber sealant was applied as an adhesive to the contact surface of the heat insulating material, and the construction was carried out.
The construction was extremely easy.

The moisture permeability coefficient of this Styrofoam insulation was measured by JIS A 9511 reference test and found to be 0.017 g / (m ² · h · mmHg). By the way, the moisture permeability coefficient of the commercially available ALGC-adhered polystyrene foam insulation is 0.020 g / (m ² · h · mmHg), and the polystyrene foam insulation of the present invention is commercially available ALG.
It was confirmed that it was superior in moisture permeation resistance to the C-clad polystyrene foam insulation.

Although the above embodiments relate to a cylindrical styrofoam heat insulating material, it is clear that the present invention can be applied to styrofoam heat insulating materials of various shapes other than this.

[0048]

As described above, the styrofoam insulation material of the present invention has high resistance to welding sparks; various coatings can be applied; styrene degradation by ultraviolet rays can be prevented; easy manufacture and mass production are possible. It has excellent moisture permeation resistance and can prevent internal dew condensation.

The styrofoam insulation material of claim 2 has the effect that it is easy to install and, in particular, can be temporarily fixed very easily. The styrofoam insulation material according to claim 1 can be applied by the same method as the conventional method as described in claim 3.

[Brief description of the drawings]

FIG. 1 (a) is a cross-sectional view of a styrofoam heat insulating material according to an embodiment, and FIG. 1 (b) is an enlarged cross-sectional view of the same surface portion.

[Explanation of symbols]

 1 Styrofoam heat insulating material 2 Divided body 3 Underlayer 4 Paint layer 5 Contact surface

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Shuriku Torikai 614 Inabago, Oyama City, Tochigi Prefecture 1 Daiya Chemical Co., Ltd.

Claims (3)

[Claims] 1. A styrofoam insulation material molded to cover equipment, pipes, etc., which is a styrofoam insulation material obtained by combining a plurality of split bodies divided into two or more parts. A styrofoam heat insulating material characterized in that an acrylic emulsion base layer is formed only on the outer surface or on the inner and outer surfaces, and a coating is applied thereon. 2. The styrofoam heat insulating material according to claim 1, wherein a pressure sensitive adhesive that can be peeled off and redeposited is applied to a contact surface between the divided bodies. 3. The method for constructing a styrofoam insulation material according to claim 1, wherein a styrofoam insulation material is applied by applying an adhesive or an adhesive to the contact surfaces of the divided bodies at the construction site. Construction method.