JPS6322437B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a planar heating device equipped with a raised outer fabric, mainly an electric carpet.

Conventionally, outer fabrics used for electric carpets and the like have been made of non-woven fabrics such as needle punched felt, French pile, etc., and have relatively smooth surfaces and are hard with no cushioning properties. however,
A raised-type surface with good cushioning properties, similar to general carpet, was desired. For smooth outer fabrics such as needle punched felt, it is easy to heat press bond using a hot melt type adhesive sheet, but in the case of napped type, the nap of the outer fabric collapses due to the temperature and pressure during hot press bonding, causing the product to deteriorate. It is inferior in quality, and the sitting comfort is similar to the smooth surface of a needle punch. Especially when using a carpet with a tufted nape outer fabric,
Normally, a polymer packing agent such as SBR, acrylic, or polyvinyl alcohol (EVA) is applied to the back side to prevent pile sutures from being pulled out, but this packing agent and a polyethylene sheet made of polymer hot melt adhesive are used. are bonded together by heat pressing, but adhesive strength cannot be obtained especially with SBR and polyethylene film because the heat meltability of the adhesive is poor. For this reason, the heat press applies high temperature and pressure to increase the adhesive strength and bond the surface material and the heater-incorporated base material. In this case, the tufted pile yarn will collapse.

In order to prevent such drawbacks, the present invention uses a resin with good thermal fluidity for the polyethylene sheet as an adhesive, so that it can be easily bonded by heat press at low temperature and pressure. To provide a planar heating device with cushioning properties that is comfortable to sit on without falling over.

That is, in the present invention, the heater-incorporated base material and the napped outer fabric material are bonded together by a hot melt adhesive layer, and the adhesive layer is made of a polymer sheet. This configuration achieves the above object.

The heater-embedded base material in the present invention refers to a planar heating element sheet on which a heater is fixed by bonding, thread fixing, laminating, etc. The heater may be a metal wire heater or a tube having a temperature fuse function. Various heaters such as a heating element, metal foil heater, conductor-polymer composite sheet heating element, etc. can be used. Further, as the base material, polymer sheets such as polyester, polycarbonate, vinyl polymer, etc., nonwoven fabrics, etc. can be used. High molecular,
As the metal laminated sheet, a metal foil coated with or laminated with polyacrylate, polyester, polyurethane, epoxy, etc. is used.
Since metal foil has high thermal conductivity, it functions as a heat equalizing plate, and in addition to metal foil, metal powder may be mixed into the polymer sheet.

Embodiments of the present invention will be described below based on the drawings.

In Figures 1 and 2, A is the surface material, B
1 is an adhesive layer, and C is a base material incorporating a heater having a heat insulating material 10 and a heater 9, which are laminated in order.

As shown in Fig. 3, the surface material A is mainly made of tufted pile yarn 1 and its pile driving base fabric 2, and this pile driving base fabric 2 is mainly made of plain-woven polypropylene or non-woven fabric such as polyester. do. A packing agent 3 is provided on the back side of the pile driving base material 2, and has functions such as preventing the pile threads 1 from being pulled out and increasing the strength and durability of the surface material. Also, this packing agent 3
The base fabric 2 and the pile yarn 1 are fixed to each other by coating or bonding a polymeric material such as SBR, acrylic, or EVA.

Adhesive layer B as a hot melt adhesive is formed as a sheet by layer 4 or layer 4' obtained by aftercoating or laminating polyethylene resin on both or one side of base polyethylene film 5. In particular, the polyethylene film 5 is made into a film using a film having a low MI value of about 1 to 10 by inflation processing, and the film is formed as a base for the layer 4 or 4' to be processed in the next step. For this layer 4 or 4', a polyethylene grade for resin molding or lamination with an MI value of 20 to 40 is used.

The heater-incorporated base material C includes an aluminum foil 7 on a heat insulating material 10 such as felt, in which the heater 9 is incorporated.
After coat (AC) on both sides of the base
The surface treatment material is formed by laminating a surface treatment material 6 of a polymer such as treated polyester, polyurethane, or epoxy, and polyethylene 8 of a hot melt adhesive. Further, as shown in FIG. 4, when the nonwoven fabric 11 is laminated on the adhesive layer 4'', a hot melt adhesive is used.

When hot pressing, this surface material A, adhesive layer B,
The three layers of the heater-embedded base material C are superimposed and bonded together by heating and pressing at the same time. The relationship between temperature and pressure is the pile yarn 1 of the outer fabric, the adhesive layer B, and the heater built-in base material C.
Determined by surface treatment material.

Note that layers 4 and 4' of adhesive layer B have an MI value of 130.
Desirably, the temperature is 20 to 40°C, but in order to further increase the adhesive strength, the processing temperature of the resin when forming layers 4 and 4' is usually 200 to 260°C, but in this case it is 300 to 320°C. Temperature processing increases the orientation between molecules and promotes double bonds, thereby increasing adhesion. To increase adhesive strength
Increasing the MI value and further increasing the processing temperature will improve the effect.

As explained above, the planar heating device of the present invention is able to adhere without damaging the properties of the raised outer fabric by devising the bonding means between the heater-embedded base material and the raised outer fabric, and its industrial effects can be improved. It's big.

[Brief explanation of the drawing]

FIG. 1 is a perspective view of a planar heating device according to an embodiment of the present invention, FIG. 2 is a schematic diagram of the main part thereof, and FIGS. 3 and 4 are detailed diagrams of the same. A... Surface material, B... Adhesive layer, C... Heater built-in base material.

Claims (1)

[Scope of Claims] 1. A heater-incorporated base material and a napped outer fabric are adhered by a hot-melt adhesive layer, the surface of the heater-incorporated base material is after-coated with a polymeric surface material, and the napped outer fabric is The backing material of the material is SBR.
1. A planar heating device coated with (styrene, butadiene, razu), and wherein the adhesive layer is made of a polyethylene sheet. 2. The polyethylene sheet is formed of resin layers having different melt indexes.
The planar heating device described in section. 3 The polyethylene sheet consists of a film sheet with an MI value of 1 to 5 in the center layer, and on both sides.
The planar heating device according to claim 2, which is after-coated or laminated with a resin having an MI value of 20 to 40. 4. The heater-embedded base material is made by stacking a surface material on a heat insulating material having a heater, and the surface material is made of metal foil as a base material, and after-coated with a polymer surface material and a hot melt polymer layer on both sides, and the above-mentioned The planar heating device according to claim 1, which is formed by adhering a hot melt polymer layer to a heat insulating material surface.