JPS5878383A - Panel heating implement and method of producing same - 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 The present invention relates to adhesion of a raised outer fabric in a planar heating device.

Conventionally, outer fabrics used for electric carpets and the like have been made of non-woven fabrics such as need 9 punch felt, French pile, etc., and have relatively smooth surfaces and are hard with no cushioning properties. However, there has been a desire for a raised-type surface with good curing properties, such as a general carpet. With smooth outer fabrics such as needle punch felt, it is easy to heat-press bond them using hot-melt adhesives, but with raised outer fabrics, the wool falls down during the heat-pressing process.
It has been difficult to use a raised outer fabric in an electric carpet with a built-in heater.

The present invention has been made with the above-mentioned problems in mind, and an object of the present invention is to provide a planar heating device, such as an electric car vent, that provides interior decoration with good cushioning properties without damaging the napped surface fabric.

The basic structure of the present invention to achieve the above object is a planar heating device in which a base material incorporating a heater and a raised outer fabric are bonded together by an adhesive layer, wherein the adhesive layer is a water-reactive adhesive. It is something. In addition, the basic manufacturing method for obtaining this planar heating device includes a roll coater coating process of urethane prepolymer on the surface of the base material incorporating the heater, a spraying process of curing water,
A method of attaching a raised outer fabric and bonding the outer fabric within 30 minutes, or a method of spraying the urethane prepolymer and curing water from a nozzle simultaneously or sequentially onto the surface of the base material incorporating the heater, and applying the raised blanket for 30 minutes. It is a method that can be bonded within minutes.

The napped outer fabric in the present invention refers to outer fabrics such as jaggies, tuff chits, knits, loops, and moquettes with a pile length of 3 or more.

In the present invention, the heater-embedded base material refers to a planar heating element sheet on which a heater is fixed by methods such as gluing, threading, laminating, etc. The heater is a metal wire heater and has a temperature fuse function. A heater such as a tubing heater, a metal foil heater, a conductor-polymer composite sheet heating element, etc. can be used. Base materials include polymer sheets such as polyester, polycarbonate, and vinyl polymers, nonwoven fabrics,
Metal foils such as A4 Ni and SUS, polymer-Kamaki laminated sheets, etc. can be used. Polymer-metal laminated sheets include polyacrylate layers, metal foils undercoated or laminated with polyester, polyurethane, epoxy, etc., metal mesh plates laminated with polymer sheets, metal powder, whiskers, etc. dispersed in polymers. A polymer composite (material sheet A) is used. When metal foil, metal powder, etc. are used in this base material, it functions as a heat soaking plate because of its high thermal conductivity.

Furthermore, the present invention is characterized by the use of a water-reactive adhesive that does not require a curing process at high temperatures of 100° C. or higher, and can be cured at high speed without solvent or pollution. When using this adhesive, it can be easily bonded by spraying water after applying the adhesive, or it can also be easily bonded by applying the adhesive and water by spraying with two nozzles. . The water used as a curing agent in the present invention may be pure water, tap water, or water containing a reaction accelerator. Examples of this water-reactive adhesive include cyanoacrylate and polyurethane, but urethane-based adhesives are suitable, especially water-reactive urethane made of polyols mainly consisting of 4,4'-genylmethane diisocyanate and polypropylene glycol. Those using prepolymers are most suitable. As the reaction accelerator, organic metal salts such as tin carboxylate, tertiary amines, urea, etc. are used.

The advantage of the adhesive of the present invention is that it does not require high temperatures (100°C or higher) in the bonding process, and after curing, the adhesive has high temperature adhesive properties, rubber elasticity, and high adhesion to metals. be. In addition, it is easy to introduce various functional groups into the prepolymer, and modification and modification are possible depending on the details of the applied material (outer fabric, base material incorporating a heater, etc.). These adhesives are cured by water mainly through the formation of urea bonds, but some of them become three-dimensional through buret bonding and the like, and are also effective in high-temperature adhesion.

Next, examples of the present invention will be shown.

Example 1 As shown in Figs.
In order to produce an electric carpet consisting of a 0 μAt film (2) and a raised surface fabric (3), the heater-embedded base material (2) and the heat insulating felt (1) were bonded in advance by hot press with a polyethylene sheet interposed. 4 in the figure is a controller.

Next, as shown in Fig. 3, a water-reactive urethane adhesive 6 (manufactured by Sunstar Chemical Co., Ltd., yi-3 viscosity (20°C) 2000CP) was poured onto the roll coater 6 installed in a dry air atmosphere, and a heater with a heat insulating material was applied. It was coated on the embedded base material.

Next, water was sprayed with a sprayer 8, and after 30 seconds, the napped outer fabric was aligned and bonded, and the material was pressed for 30 seconds with a heated press 9 at 60° C. and taken out. After 6 minutes, the adhesive strength was measured by peeling method and found to be 2.6Ky/2.5
crn, and sufficient adhesive strength was confirmed.

Here, as a conventional example, when an experiment was conducted using a heat press method using a hot melt adhesive, the nap of the napped outer fabric 3 fell down as shown in FIG. The relationship between mold temperature and pressurizing time as shown in FIG. 6 was obtained as the condition for the nap to collapse. From this figure, it can be seen that using a hot press process at 100° C. or higher always has a defect that impairs the nap. On the other hand, in the case of hot melt adhesives that can be bonded at temperatures below 100°C, it is natural that
Needless to say, the adhesive strength cannot be maintained at a high temperature of 1100° C., making it unsuitable for use as a heating device for heating purposes.

Example 2 A two-nozzle spray gun 10 was placed on the heater-incorporated base material 7 with heat insulating material manufactured in the same manner as in Example 1 as shown in FIG.
Water reaction polyurethane prepoly? -(fnstachemistry(
Ltd.) M2, viscosity 1500CP (20°C)) 11 and urea 6
It was sprayed with 12% water. After 30 seconds, outer cloth 3
were laminated together and pressed for 6 seconds using a hot press 9 at 60°C. 1
After 0 minutes, the adhesive strength was measured in the same manner as in Example 1, and it was found to be a sufficient adhesive strength of 1.3 Ky/2.5 cIn.

When examining the adhesive properties of the adhesives of Examples 1 and 2 with the material of the heater-incorporated base material 7, it was found that the adhesive strength was somewhat poor for At plates, but the adhesive strength was strong for polyurethane, epoxy, and polyester. Showed strength.

As described above, the present invention is very useful for heating devices such as electric carpets that use a raised surface fabric, and has great industrial value.

[Brief explanation of drawings]

FIG. 1 is a diagram showing the appearance of an electric carpet in an embodiment of the present invention. FIG. 2 is a sectional view of an electric car vent in an embodiment of the present invention. FIG. 3 is a diagram showing the manufacturing process in Example 1, and FIG. 4 is a diagram showing the manufacturing process in Example 2. FIG. 6 is a diagram showing the state of hair falling in a heat press in a conventional example, and FIG. 6 is a diagram showing the relationship between the mold temperature and pressurizing time to flatten the hair of a raised outer fabric in a conventional example. 1...Insulating felt, 2...Tubing, heater built-in base material, 3...Napped outer fabric, 6...
...Water 1° reactive urethane adhesive, 6...Roll coater,
7...--Heater built-in base material, 8...--Spray, 9...Heating press, 10...Spray gun, 11...Water reaction Polyurethane prepolymer, water containing urea.

Claims (1)

[Scope of Claims] (1) A planar heating device formed by adhering a heater-incorporated base material and a raised surface fabric with an adhesive layer, characterized in that the adhesive layer is made of a water-reactive adhesive. (2) A planar heating device according to claim 1, wherein the water-reactive adhesive is a urethane adhesive (3) The urethane adhesive is a polyol and 447 −
Reacting a prepolymer containing siphenylmethane diisocyanate with water or water containing a reaction accelerator,
The planar heating device according to claim 2, characterized in that it forms a urea bond and a biuret bond. (4) Claim 1f4-Kushi-Number φ is characterized in that the heat-embedding base material is made of any one of a polymer sheet, metal foil, or a polymer-Kana paulownia laminated sheet. A surface heating device. (6) A patent claim characterized in that the outer fabric adhesive surface of the base material incorporating the heater is composed of at least one selected from an aluminum layer, a polyacrylate layer, an epoxy resin layer, a polyester layer, and a polyurethane layer. A planar heating device as described in Scope 4. (6) A heat insulating layer on the back side of the adhesive surface of the outer fabric of the heater-embedded base material (7) A method of bonding the heater-embedded base material and the raised outer fabric with an adhesive layer, in which the heater-embedded base material is sequentially coated with: A planar heating device characterized in that the outer fabric is bonded to a practical adhesive strength within 30 minutes by providing a roll coater coating process of a urethane prepolymer, a spraying process of curing water, and a laminating process of a raised outer fabric. Production method. (8) A method of bonding a heater-embedded base material and a raised surface fabric with an adhesive layer, which involves spraying a urethane prepolymer and curing water onto the surface of the heater-embedded base material simultaneously or sequentially from separate nozzles; A method for manufacturing a planar warming device, characterized by laminating a raised outer fabric and adhering with sufficient adhesive strength within 30 minutes.