JPH0418457Y2 - - Google Patents

Description

[Detailed description of the invention] "Purpose of the invention" This invention relates to the invention of a cushion body for a seat.
You can freely perform cleaning work with water, etc.
Furthermore, it is an object of the present invention to appropriately obtain products with novel characteristics such as comfortable seat members with favorable cushioning properties and cushioned seats that do not generate dust.

(Industrial Application Field) A cushion body that can be washed with water, has sufficient cushioning action, and does not generate dust.

(Prior art) Cushion bodies are indispensable for providing cushioning and softness in seating bodies, etc., and have been used in various types of cushion bodies. , and those that are not.

That is, the former has a covering made of vinyl leather or the like to increase the abrasion strength of the cushion material and provide sufficient cosmetic and waterproof properties, while the latter is lined with a general woven fabric, knitted fabric, etc. It is covered with a cushion material, and in some cases, a woven fabric treated to make it water repellent may be used.

In recent years, the use of clean rooms has become increasingly popular for the manufacture of electronic materials such as semiconductors and for medical and high-performance chemical products, and the use of substances that generate dust is prohibited in such clean rooms. Ru. However, chairs and the like are indispensable in a clean room, and it is difficult to use any of the conventional chairs as described above because dust is generated from the cushion material when the cushion expands and contracts. That is, in clean rooms, it is common to use stainless steel seating parts without cushioning material. In addition, if the cushion is filled in a covering that almost completely blocks air permeability in some areas, air under load will remain trapped and the elastic action of the cushion material due to expansion and contraction will not be effectively obtained. A device with a ventilation hole formed in the bottom of the seating area is also used.

(Problem to be solved by the invention) It goes without saying that the conventional products described above have a cushioning effect in any case, but those covered with an airtight layer so as to have waterproof properties have a cushioning effect. Since it has no moisture permeability, it gives a stuffy feeling in the summer and is not comfortable to use.

The latter, which is coated with a general woven fabric, does not have the above-mentioned disadvantages, but it is limited to indoor use because it allows moisture to pass through and absorbs water, especially into the interior cushion material. Moreover, wiping with a wet rag or washing with water is strictly prohibited.
In addition, in cases where it is required to create conditions that accurately suppress dust generation, such as in a clean room as described above, the cushion body becomes a source of dust generation. Stainless steel chairs for clean rooms without cushioning material have a significantly inferior feel, cannot withstand sitting on them for long periods of time, and are unsafe because they slip. If the seat is made of cushion material and a vent is provided on the bottom surface of the seat, exhaust air from the cushion material will be concentrated from the vent when the seat is seated, and dust generation will not be eliminated.

"Structure of the invention" (Means for solving the problem) (1) A hydrophilic resin film is formed on one side of a moisture-permeable waterproof sheet made of continuous porous polytetrafluoroethylene to completely improve air permeability. A cushion body for a seat, characterized in that a cushion material is covered with the sheet.

(2) The cushion body for a seat according to item 1 above, which is formed by covering the outer surface of a moisture-permeable waterproof sheet with a decorative sheet.

(3) The cushion body for a seat according to item 1 above, which uses a moisture-permeable waterproof sheet reinforced by laminating a low dust-emitting fabric such as a long-fiber polyester fabric on the outer surface.

(Function) The moisture-permeable waterproof sheet effectively waterproofs the cushion material and allows moisture to pass through appropriately, such as when sweating.

In addition, by covering the cushion material with a sheet containing a continuous porous polytetrafluoroethylene material, dust generation from the cushion body can be effectively prevented. Your body will also be excellent.

The presence of the hydrophilic resin film can prevent the moisture-permeable waterproof sheet from being contaminated by amino acids, fats, etc. during perspiration and reducing its waterproof properties.

Even if the outer surface is covered with a decorative sheet or the like, the above-mentioned functions can be achieved in the same way.

(Example) Specific embodiments of the present invention as described above will be described below with reference to the accompanying drawings.

The basic form of the invention is as shown in Fig. 1, in which a urethane foam, cotton material, or other known cushion material 10 is covered with a moisture-permeable waterproof sheet 1 having a hydrophilic resin film 3 formed on one side. It is something.

Furthermore, the device according to the present invention can be implemented as shown in FIG. It is.

A polytetrafluoroethylene film made porous by a stretching process as shown in FIG. 3 or 4 is used for the water-permeable and moisture-proof sheet 1, that is, a polytetrafluoroethylene film is stretched in one direction. This results in a structure in which countless fibrillated fine fibers 12 are formed between a large number of micronodules 11 as shown in FIG. 3, and when stretched in multiple directions, fine fibers are formed as shown in FIG. 12 is formed in the shape of a spider web. In other words, the pores 13 whose maximum pore diameter is about 0.2 μm
are formed between the fine fibers 12, and ensure sufficient air permeability in the pores 13, but the sufficient fineness of the pores 13 and the water repellent property of the polytetrafluoroethylene resin itself ensure sufficient air permeability in the pores 13. In combination, it has sufficient waterproofness, and the above-mentioned breathability allows vapor to pass through effectively, ensuring moisture permeability.

However, as shown in Fig. 5, in the case of Figs. 3 and 4, a hydrophilic resin film 3 as shown in Fig. 5B is formed on one side of Fig. 5A to prevent air permeability. The structure can also maintain sufficient moisture permeability. By using such a hydrophilic resin film 3, as shown in FIG. 1 or 2, a moisture-permeable and waterproof sheet 1 can be obtained which has neither water permeability nor air permeability, but retains moisture permeability as is.
That is, the hydrophilic resin film 3 has the property of allowing moisture to move under conditions where the water vapor concentration is high on one side and low on the other side, so that moisture is absorbed from the high side and desorbed or evaporated from the low side. , polyether polyurethane, benfluoroesulfonic acid, etc. For example, products such as Hypol (trade name) manufactured by WRGrece in the United States and Nafion (trade name) manufactured by EIdupont are cited as products that can accurately form such a hydrophilic resin film 3, and their appearance under a microscope is as follows.
As shown in the figure.

Such a hydrophilic resin film 3 may be formed on either one side of the moisture-permeable waterproof sheet 1, but if it is formed on the outside, it will become porous due to the amino acids and resins contained in sweat when sitting on the seat. The moisture-permeable waterproof sheet 1 made of a high-quality polytetrafluoroethylene membrane can be prevented from being contaminated, and at the same time, the waterproof property can be prevented from deteriorating.

Furthermore, according to the present invention, in order to reinforce the above-mentioned waterproof and breathable sheet 1, a fabric 4 that does not generate dust, such as a long-fiber polyester fabric, is laminated as shown in FIG. As shown in FIG.
It can be carried out by adhering it to.

As the waterproof and moisture permeable sheet 1 made of the porous polytetrafluoroethylene membrane shown in FIGS. 3 and 4,
For example, if the maximum pore diameter is 0.2 μm and the thickness is 10 μm,
It has been experimentally confirmed that even 0.1 μm of dust does not pass through, and this indicates that the hydrophilic resin film 3 has a sufficient dust generation prevention effect even if it does not block air permeability. It is.

"Effect of the invention" According to the invention as explained above, waterproof and moisture permeable properties can be obtained at the same time by the waterproof and moisture permeable sheet 1, so that it is not absorbed into the cushion material by washing with water or the like. Moreover, since it is moisture permeable, it can be used comfortably even in summer. Generally, polytetrafluoroethylene is used alone to effectively prevent dust generation from the cushion material 10, but with the hydrophilic resin film 3, dust generation can be more completely prevented, and the cushion material 10 can also be used in clean room chairs. Accurately avoid the possibility of becoming a source of dust while ensuring Even if the outer surface is covered with a decorative sheet 2, the decorative sheet is the only thing that can be washed or moistened with rainwater, and it can be easily dried, so it can be used not only for indoor use but also for outdoor tote bags, outdoor seats, etc. It can be adopted as appropriate, and has the effect of expanding the scope of use of cushioned seats and making them more comfortable to use, and is a highly effective idea in practical terms.

[Brief explanation of the drawing]

The drawings show the technical content of the present invention, and Figures 1 and 2 are cross-sectional views of embodiments of the present invention.
Figures 3 and 4 are micrographs of the fiber shapes of each example of the moisture-permeable waterproof sheet used in the present invention, and Figure 5 is the same as Figures 3 and 4 of the hydrophilic resin membrane for blocking air permeability. 6 and 7 are cross-sectional views showing an example of a reinforcing structure for the moisture-permeable and waterproof sheet. However, in these drawings, 1 is a moisture-permeable waterproof sheet, 2 is a decorative sheet, 3 is a hydrophilic resin film, and 4 is a waterproof sheet.
1 is a long fiber polyester, 5 is an adhesive layer, 10 is a cushion material, 11 is a micro nodule, 12 is a fine fiber,
13 indicates pores.

Claims (1)

[Claims for Utility Model Registration] (1) A hydrophilic resin film is formed on one side of a moisture-permeable waterproof sheet made of continuous porous polytetrafluoroethylene to completely improve air permeability, and the sheet can be used as a cushion material. A cushion body for a seat characterized by being encapsulated with. (2) The cushion body for a seat according to claim 1, which is obtained by covering the outer surface of a moisture-permeable waterproof sheet with a decorative sheet. (3) A cushion body for a seat according to claim 1, which uses a breathable and waterproof sheet reinforced by laminating a low dust-emitting fabric such as a long-fiber polyester fabric on the outer surface.