JPH0722128Y2 - Seat heater - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Object of the Invention] (Industrial field of application) The present invention relates to a seat heater, which is used for an automobile seat, an aircraft seat, and the like.

(Prior Art) As the prior art according to the present invention, there are (1)
There is a gazette of the issue.

This is one in which a sheet-shaped heating element sheet having a conductive thin film formed on the upper surface of a plastic sheet is sewn to the back side of the sheet skin.

(Problems to be solved by the invention) However, the heater of the automobile seat is focused on the heat performance, and the breathability of the seat is impaired so that the moisture inside the seat cannot be completely removed and the seat is comfortable to sit in. There is a problem that it does not exist.

The present invention has excellent water resistance in automobile seat heaters,
A technical issue is a seat heater that is highly breathable and comfortable to sit on.

[Constitution of device]

(Means for Solving the Problems) The technical means taken to solve the problems are as follows. That is, an electrode and a heating element are provided on or inside a breathable substrate sheet, and the substrate sheet and the heating element are coated with a porous film having a pore size of 0.6 to 4 μm or a composite material using a porous film. .

(Function) The porous film covering the heating element has pores of 0.1 to 4 μm,
Since this hole is small, it is water resistant and breathable, and can absorb moisture from the inside of the seat, so it is a comfortable seat heater.

(Examples) Examples will be described below.

In FIG. 1, reference numerals 1 and 2 are electrodes having a thickness of 100 μm.
Polyester woven fabric (Dainitz, 600H × S) 3 is a silver paste (Nippon Acheson, 477SS) applied and formed at intervals on the surface, and 4 is a heating element, carbon paste (Nippon Acheson, 432SS) is applied and formed. Reference numerals 5 and 6 are lead wires for applying a voltage to the electrodes, which are φ0.5 mm and are soldered to the electrodes.

The heating element sheet prepared in this way has the thickness shown in Fig. 2.
Polyethylene porous films 7 and 8 (Nitto Denko Breathlon) having a diameter of 50 μm, a pore diameter of 4 μm, and a porosity of 45%.
The scissors from the bottom were heat-welded around them.

For heat welding, a welding machine M as shown in FIG. 3 was used, and welding was performed at 150 ° C. for 1 minute. In the figure, 11 is the upper mold, 12 is the lower mold,
13 is a lead wire portion.

FIG. 4 is a cross-sectional view of the finished product. The heater thus prepared was tested for water resistance test, ion water resistance test and air permeability. The results are shown in Table 1.

Example 2 Instead of the polyester woven fabric shown in FIG. 1 of Example 1, a polyester non-woven fabric having a thickness of 200 μm (Unitika-2
0507WTD) was used to form electrodes and heating elements in the same manner as in Example 1.

As the lead wires (5 and 6 in FIG. 1) for applying a voltage, a conductive adhesive (made by Grace-Japan, 57c) was used instead of soldering.

The heating element sheet prepared in this manner was used in Example 1 as a porous film made of fluorine resin (Nippon Denko, Microntex, NTF-5200) having a thickness of 80 μm, a pore size of 0.6 μm and a porosity of 85%. In the same manner as described in (1) and (2) above, the periphery was heat-welded. The welding condition is 35
Welded at 0 ° C. for 1 minute. The heater thus prepared was tested for water resistance test, ion water resistance test and air permeability. The results are shown in Table 1.

There is no problem even if a non-woven fabric or the like is fixed to one side of the porous film in order to improve the strength of the porous film to be coated.

The polyethylene porous membrane used in Example 1 had a thickness of 200
As a third example, the test results of the sheet prepared in the same manner as in Example 1 using a sheet (Nippon Denko's Breslon H-1338) to which a nylon non-woven fabric having a thickness of μm is adhered are set forth.
Shown in the table.

FIG. 5 is a cross-sectional view of the completed sheet. Reference numerals 1 and 2 are electrodes 3, a substrate sheet, 4 are heating elements, 7 and 8 are porous membranes, and 9 and 10 are skins of sheets made of non-woven fabric.

In the test evaluation of the sheet, in the water resistance test, the product was completely immersed in distilled water and the appearance change and the current amount change were observed when 12 V was applied between the electrodes for 2 hours.

In the ionic water resistance test, the product was completely immersed in a 2 mol / l sodium chloride aqueous solution and changes in appearance and current were observed when 12 V was applied for 2 hours. Further, as shown in FIG. 6, the breathability was evaluated by sewn the seat on the back of the seat skin and whether or not discomfort due to sweating or the like occurred on the hips and back when a person sat down.

FIG. 6 shows a seat heater 20 in which the substrate sheet 3 and the heating element 4 are welded at their peripheries with multi-layered films 9 and 8 built into the seat and back portion of an automobile seat, where 14 is a skin and 15 is a seat shoe. Show Syon.

[Effect of the Invention] The present invention has the following effects. That is, (1) As a waterproof treatment, since the hole diameter of the film coated with the heater is 4 μm or less, the film can be completely waterproofed.

(2) Since it is a porous membrane having a pore size of 0.6 μm or more, it has air permeability.

(3) Since a thin coating is used, the seat is very comfortable to sit on.

[Brief description of drawings]

FIG. 1 is an explanatory view of a heating element sheet, FIGS. 2 and 4 are explanatory views of the first embodiment, FIG. 3 is an explanatory view of a welding machine, FIG. 5 is an explanatory view of the third embodiment, and FIG. FIG. 3 is an external view of a seat with a built-in seat heater. 1 ... Electrode, 3 ... Substrate sheet, 4 ... Heating element, 7,8 ... Porous membrane, 9, 10 ... Seat seat skin.

Claims (2)

[Scope of utility model registration request] 1. An electrode and a heating element are provided on or inside a breathable substrate sheet, and the substrate sheet and the heating element are provided.
A seat heater for a seat, which is coated with a porous film having a pore size of 0.6 to 4 μm or a composite material using the porous film. 2. A seat heater in which the porous membrane according to claim 1 is made of polyethylene resin or fluorine resin.