JPH06403B2 - Adhesion method for inorganic fiber insulation - Google Patents

Description

TECHNICAL FIELD The present invention relates to a method of adhering a surface covering material of an inorganic fiber heat insulating material, and in particular, to a surface covering material of an inorganic fiber heat insulating material with good workability,
It relates to a low cost and efficient bonding method.

[Prior Art] Inorganic fiber mats such as glass fiber mats are widely used as various heat insulating building materials such as wall materials, ceiling materials, floor materials, and roof substrates because of their excellent heat insulating properties.

In order to improve the workability by eliminating the irritative (scratching) of the fiber, such an inorganic fiber heat insulating material, in order to improve the moisture-proof and the dew-proof property and the surface finish after construction,
Generally, one surface or both surfaces of the mat, and in some cases, the plastic film, aluminum-deposited plastic film, kraft paper, polyethylene sheet, aluminum foil kraft paper, glass cloth, or other surface covering material is adhered with an adhesive to the surface, It is often used by coating.

Therefore, conventionally, as an adhesive for bonding the surface material,
An organic solvent type adhesive or a hot melt type adhesive such as asphalt is used.

[Problems to be Solved by the Invention] However, among the conventionally used adhesives, organic solvent-type adhesives vaporize the solvent during use, thereby polluting the atmosphere and deteriorating the working environment.

 May be subject to hydrocarbon emission regulations.

There is a risk of fire and explosion and it is not easy to handle.

There were problems such as. Further, since the hot melt type is expensive, there is a problem that the cost of the product is increased.

[Means for Solving Problems] The present invention solves the above-mentioned conventional problems by using a water-dispersed adhesive as an adhesive, and is a method of adhering a surface covering material to an inorganic fiber heat insulating material. In the above, the water-dispersible adhesive of an acrylic copolymer having a water content of 25 to 75% by weight is applied to the adhered surface of the inorganic fiber heat insulating material, and 3 to 50 g / m ^{2 in} terms of solid content on the adhered surface of the heat insulating material. After spraying, it is dried to remove a part of the water content of the water-dispersed adhesive adhered by the spray so that the water-dispersed adhesive has a water content of 5 to 40% by weight, and then a surface covering material is applied. Together,
10 kg at a temperature of 100-230 ° C with a heating roll
A method for adhering a surface material to an inorganic fiber heat insulating material, which is characterized in that the material is pressure-bonded with a pressure of not less than / m ² .

Hereinafter, the present invention will be described in detail with reference to the drawings.

FIG. 1 is a side view showing an example of a manufacturing apparatus suitable for implementing the present invention.

In FIG. 1, 1 is an inorganic fiber mat which is conveyed by a conveying table 10 in the direction of arrow X, 3 is a spray nozzle for the adhesive 2, 4 is a dryer, 6 is a wound body of the surface covering material 5, Reference numeral 7 is a spare front material roll, 8 is a press roll, and 9 is a pressure / heating roll.

In the method of the present invention, first, the water-dispersible adhesive 2 is applied to the adhered surface 1a of the surface covering material of the inorganic fiber mat 1 by the spray nozzle 3. The spray may be either an air spray or an airless spray. As the spray nozzle 3, for example, a nozzle having a spray width of about 400 mm is used, and the spray is applied by sweeping (oscillating) at a right angle to the conveying direction of the mat 1. Those are preferable. In this case, the sweep speed is preferably at least 1 sec / sweep or less in order to make the adhesive coating amount as small as possible within the required range. Therefore, it is preferable to employ the rodless cylinder as the actuator. As for the sweep speed, for example, the transport speed of the mat 1 is 10
In the case of 0 mm / sec, 0.8 sec / sweep (7.
5m / min) and wait time between each sweep is 0-
It is preferable to set appropriately within the range of 2 sec. In addition, the spray nozzles 3 may be fixed spray nozzles set in a large number in the width direction of the mat 1.

In the present invention, the water-dispersible adhesive to be spray-coated is preferably an acrylic-copolymer water-dispersible adhesive that forms a strong molecular bond after drying. If the water content of the water-dispersed adhesive applied by spraying is too low, it is difficult to spray, and if it is too high, it is disadvantageous for dry adhesion in the subsequent step. Therefore, the water content of the water-dispersed adhesive is 25 to 75% by weight, preferably about 30 to 60% by weight.

The amount of the water-dispersible adhesive applied is preferably as small as possible within a range where sufficient adhesive strength can be obtained, and is 3 to 3 per coated area of the inorganic fiber mat in terms of solid content of the adhesive.
50 g / m ^2, preferably between 5 to 20 g / m ² approximately.

After spray-coating the water-dispersible adhesive 2, the mat 1 is passed through a dryer 4 to heat and dry the coated surface, and a part of the water content of the coated water-dispersible adhesive is dried and removed. That is, when the water-dispersed adhesive has a too low water content, the spray coating efficiency is poor, and therefore the water-dispersed adhesive is sprayed with a relatively high water content, but at the time of bonding, the water content in the adhesive is low and the viscosity is high. The higher the value, the higher the adhesive force on the surface material and the stronger the adhesive force. For this reason,
In the present invention, the water-dispersed adhesive-coated surface is dried before sticking the surface covering material. By this drying, the water content in the water-dispersed adhesive is adjusted to 5 to 40% by weight, particularly 10 to 30% by weight, and the water content in the adhesive is preferably 20 to the water content before drying. When it is set to 70%, extremely high adhesive strength can be obtained.

In order to obtain such a dry state, the conditions for heating and drying by the dryer 4 differ depending on the type and amount of the water-dispersible adhesive, the size of the mat, etc.
It is about 10 seconds at 120 ° C. or about 7 seconds at 150 ° C.

After drying, the front covering material 5 unwound from the front covering material winding body 6 is laminated, lightly pressed by the pressing roll 8, and then pressed and heated by the pressing / heating roll 9 to form the mat 1 on the covering material. 5 is firmly adhered. Since the pressing roll 8 is for pressing the surface covering material 5 lightly immediately after bonding to stabilize the bonding surface, it does not have to be a heating roll, but it can also serve as the pressing / heating roll of 9.

The pressure / heating roll 9 is used to forcibly dry the residual water content of the water-dispersed adhesive to obtain a strong adhesive force, but it may be a simple pressure roll. The pressurization / heating conditions by the pressurizing / heating roll 9 differ depending on the type and amount of the water-dispersible adhesive used, the type of the surface covering material, and the scale of the mat.
Generally, 10 kg / m ² or more, preferably 10 to 200
The heating is performed at 100 to 230 ° C., preferably at 120 to 150 ° C. with a pressure of about kg / m ² .

In the present invention, examples of the inorganic fiber mat include mats such as glass wool, rock wool, slag wool, and glass strands, cut mat-like materials thereof, and mixed or laminated mat-like materials thereof.

As the surface covering material, glass cloth, kraft paper, polyethylene, vinyl chloride, vinylidene chloride, polystyrene, polypropylene, polyester, polycarbonate and other plastic films and laminated products thereof, and polyethylene kraft paper and other paper, aluminum foil, etc. Laminated products or products obtained by depositing aluminum or the like on them, for example, aluminum-deposited kraft paper, aluminum-deposited polyethylene, aluminum-deposited polypropylene, aluminum-deposited polyvinylidene and the like can be mentioned. Since the water-dispersed adhesive used in the present invention usually becomes transparent by drying, the spray pattern is not visible as in the case of the hot-melt adhesive even when a glass cloth or polyethylene film is used as the surface covering material, No restrictions on the surface material.

Particularly, the method of the present invention is extremely excellent in the case of adhering a surface covering material such as glass cloth, kraft paper, kraft paper with aluminum foil, aluminum vapor-deposited polyethylene film or polyethylene film to a glass wool mat of about 9 to 96 kg / m ^3. The effect is obtained.

[Operation] In the present invention, since the water-dispersed adhesive is used as the adhesive, the surface material can be bonded at a low cost and under a good working environment.

Also, a desired amount of adhesive strength can be obtained by applying a small amount, and the adhesive strength can be greatly increased by partially removing the water content of the bonding agent by drying after spray-coating the adhesive, resulting in extremely high adhesion. Strength is obtained.

[Examples] Examples will be described below.

Example 1 By using the apparatus shown in FIG.
The glass cloth was adhered to a glass wool mat (thickness: 50 mm) of kg / m ³ . Moisture content 47.5 as an adhesive
A weight percent acrylic copolymer water dispersion adhesive was used.

The application conditions of the adhesive, the drying conditions after the application, and the pressurization and heating conditions by the pressurizing / heating roll 9 were as follows.

Coating conditions Mat transfer speed: 6 m / min Nozzle used: Airless spray nozzle (pump pressure 64 kg / cm ² ) Sweep speed: 0.8 seconds / sweep, waiting time 2 seconds (rodless cylinder pressure: 4 kg / cm ² ) Coating amount : 18 wetg / m ² drying condition: 125 ± 25 ° C. for 10 seconds in an infrared heater heating furnace.
The residual water content of the applied adhesive was set to about 20% by weight.

Pressurization and heating conditions Pressurization: Hold down 5 mm against the thickness of the mat.

Heating: Mat surface temperature 100 ° C. to 150 ° C. With respect to the heat insulating material thus obtained, a peeling test of the surface covering material was conducted by the following method, and its adhesive strength was examined. The results are shown in Table 1.

Surface material peeling test A free piece is formed by slightly peeling the surface material from the glass wool mat as if it were rolled. Then, the free side of this free piece is grasped by the clamp of the test apparatus and pulled in the direction perpendicular to the mat surface. Maximum load (k
g) is determined, and this is divided by the width (cm) of the root of the free piece to obtain the adhesive strength.

Comparative Example 1 The surface covering materials were adhered in the same manner as in Example 1 except that the drying after applying the adhesive material was not carried out, and the adhesive strength thereof was examined. The results are shown in Table 1.

From Table 1, it is clear that the method according to the present invention can bond the surface covering material extremely strongly.

[Effects of the Invention] As described in detail above, the method of adhering the surface covering material of the inorganic fiber heat insulating material of the present invention is to apply the water-dispersible adhesive to the surface to be adhered of the inorganic fiber heat insulating material by spray coating, and then dry it. It removes a part of the water content of the water-dispersed adhesive that has been spray-applied, and then bonds the front and back materials together and press-bonds them, so there is no problem of solvent vaporization like organic solvent-based adhesives, so air pollution There is no problem and the working environment becomes good.

 It does not cause pollution problems.

Since there is no danger of fire or explosion, it is not regulated by the Fire Service Act.

And so on. Also, compared to hot melt adhesives,
Since it is inexpensive, it is possible to reduce the cost of the product, and since a small amount of adhesive can be applied to obtain sufficient adhesive strength, the noncombustibility of the heat insulating material base mat is not adversely affected. Further, since the adhesive generally becomes transparent after drying, there is no restriction on the surface material.

Therefore, according to the present invention, it is possible to efficiently bond the surface covering material of the inorganic fiber heat insulating material at a low cost, and it is possible to obtain high bonding strength with respect to any heat insulating material.

The method of the present invention can be carried out mechanically in continuous production, and is industrially extremely advantageous.

[Brief description of drawings]

FIG. 1 is a side view showing an example of a manufacturing apparatus suitable for implementing the present invention. DESCRIPTION OF SYMBOLS 1 ... Inorganic fiber mat, 2 ... Water dispersion type adhesive, 3 ... Spray nozzle, 4 ... Dryer, 5 ... Front material, 8 ... Press roll, 9 ... Pressurization / heating roll.

 ─────────────────────────────────────────────────── ─── Continuation of the front page (56) Bibliography Sho 53-52616 (JP, U) Kunio Tsukada, "Adhesion Technology Manual" (Received at the Patent Office Museum on February 22, 1979) Stock Company Techno No. Pages 10-11, Pages 138-144

Claims (1)

[Claims] 1. A water-dispersible adhesive is sprayed onto the adhered surface of an inorganic fiber heat insulating material and then dried to remove a part of the water content of the water-dispersed adhesive adhered by the spraying, and then the surface material. In the method for adhering the surface covering material of the inorganic fiber heat insulating material, which comprises a step of bonding and pressure bonding, the water-dispersed adhesive is a water-dispersed acrylic copolymer adhesive having a water content of 25 to 75% by weight. The water-dispersed adhesive on the adhered surface of the heat insulating material in an amount of 3 to 50 in terms of solid content.
After g / m ² sprays, the water content of the aqueous dispersion type adhesive and 5 to 40 wt% by drying, and then by bonding a table covering material, the heating roll at a temperature of 100 to 230 ° C. 10 kg / A method for adhering a surface material to an inorganic fiber heat insulating material, which comprises press-bonding with a pressure of m ² or more.