JPS60196127A - Air house - 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 an air house that is excellent in airtightness, heat insulation, humidity control, and light transmittance, and is particularly suitable for the agricultural field.

Conventional agricultural greenhouses include steel-framed glass-covered houses, steel-framed houses covered with plastic plates, pipe-based plastic film-covered houses, steel-framed pipe-covered houses with plastic films, and the like. However, since all of these are supported by steel frames or plastic pipes, it is difficult to assemble them.
Not only does it take time to decompose, but the pillars block sunlight and leave areas where the crops are not exposed to light.

Another problem is that it is weak against shock and the parts that come into contact with hard supports are easily broken. In order to avoid such problems, the inventors of the present invention have repeatedly considered whether it is possible to use an air house that can stand on its own using internal pressure without using supports for agricultural greenhouses. It was found that the balance between heat retention and moisture control was not achieved.

That is, synthetic polymer sheets commonly used for agricultural purposes, such as mulch films, are hydrophobic, and therefore water vapor generated inside the greenhouse condenses on the surface of the sheet and falls back into the greenhouse. Therefore, in order to adjust the moisture inside the greenhouse, it is necessary to constantly exchange a portion of the moisture-rich inside air with outside air. This means that warm inside air is exchanged with cold outside air, which causes the temperature inside the house to drop.

Therefore, the inventor of the present invention has studied whether it is possible to control the humidity without ventilation with outside air and to improve the heat retention inside the house, and as a result, the present invention has been arrived at.

That is, the present invention provides an air house that is made of a synthetic polymer sheet and a net or rope reinforcing the sheet and is self-supporting due to an internal pressure higher than atmospheric pressure. This air house is constructed of a synthetic fiber nonwoven fabric with a hydrophilic polymer layered on one side, and is characterized in that the hydrophilic polymer layer is placed on the outside.

The air house of the present invention will be explained below using preferred embodiments.

FIG. 1 is a panoramic view of the air house of the present invention.

The ceiling and walls (side surfaces) of the air house are composed of a single sheet of synthetic polymer sheet 1, and the portion of the synthetic polymer sheet that corresponds to the side surface of the air house is a synthetic fiber nonwoven fabric laminated with a hydrophilic polymer. It is made up of. On the outside of the synthetic polymer sheet 1, a net 2 prevents the sheet from expanding and stretching outward due to internal pressure and prevents the house from floating.

FIG. 2 is a sectional view of the air house, making the structure of the present invention even clearer. The part of the synthetic polymer sheet 1 that corresponds to the ceiling is a normal film or sheet,
If this air house is used for agricultural purposes, a transparent sheet is preferable. However, depending on the application, any sheet such as a pear-shaped translucent sheet can be used. The side portion is the aforementioned laminated nonwoven fabric 1a, and this nonwoven fabric is arranged so that the laminated hydrophilic polymer layer is on the outside of the air house. By adopting this configuration, sunlight uniformly reaches the entire interior of the air house from the ceiling, and water vapor generated inside the house is adsorbed by the hydrophilic polymer through the voids in the nonwoven fabric layer. The water adsorbed by the hydrophilic polymer is then evaporated into the outside air and is almost never dripped into the greenhouse again.

In addition, during rainy weather, the hydrophilic polymer acts as a protective layer to protect the nonwoven fabric from rainwater. The laminated nonwoven fabric layer also exhibits heat insulation properties, so the greenhouse maintains heat retention. In a synthetic polymer sheet, in order to integrate the laminated nonwoven fabric with another transparent sheet, etc., various known methods such as heat sealing or ultrasonic sealing of the boundary, sewing with a sewing machine, etc. can be used. .

Figure 3 shows the grounding part of the air house, where the ends of the synthetic polymer sheet and net are buried underground. In this embodiment, the sheet 3 is connected to the end of the net, and this sheet end is buried underground, but the net itself may be buried.

The air house of the present invention is self-supporting due to an internal pressure higher than atmospheric pressure, but the internal pressure is 0.5 to 2Q+wa+ higher than atmospheric pressure.
It is sufficient to increase H20, preferably from 0.8 to 10IIIH2O. To maintain internal pressure, a blower or compressor can be operated as necessary to supply air into the house.

Among the synthetic polymer sheets that can be used in the present invention, those constituting the ceiling portion may be various known thermoplastic resin films, sheets, nonwoven fabrics, knitted or woven fabrics, or laminates thereof, and if necessary, a laminate of water-soluble polymers, etc. For example, films or sheets are preferred.

Thermoplastic resins include low-density polyethylene, high-density polyethylene, polypropylene, poly-1-butene, poly-4
- Polyolefins such as random or block copolymers of α-olefins such as methyl-1-pentene or ethylene, propylene, 1-butene, 4-methyl-1-pentene, ethylene/acrylic acid copolymer, ethylene/acetic acid Vinyl Jhi polymer, ethylene/vinyl alcohol copolymer, ethylene/vinyl compound copolymer such as ethylene/vinyl chloride copolymer, polystyrene, acrylonitrile/styrene copolymer, ABS, methyl methacrylate/styrene copolymer, α - Styrenic resins such as methylstyrene/styrene copolymer, polyvinyl chloride, polyvinylidene chloride, vinyl chloride/vinylidene chloride copolymer,
Polyvinyl compounds such as polymethyl acrylate and polymethyl methacrylate, polyamides such as nylon 6, nylon 6-6, nylon 6-10, nylon 11 and nylon 12, thermoplastic polyesters such as polyethylene terephthalate and polybutylene terephthalate, polycarbonate, Any resin such as polyphenylene oxide or a mixture thereof may be used.

The synthetic fibers constituting the nonwoven fabric are the aforementioned thermoplastic resin fibers, but a small amount of natural fibers may be mixed therein. The thickness of the fibers is usually 0.5 to 30 deniers. The nonwoven fabric may be of any kind, such as short fibers or long fibers bonded together with a binder, fused together, or randomly combined by mechanical force such as needle punching. A particularly suitable nonwoven fabric is a spunbond nonwoven fabric, with a fiber diameter of 1 to 20 deniers and a basis weight of 15 to 4.
0 g/rrl is preferred.

The hydrophilic polymer is laminated on one side of the nonwoven fabric by various known methods. Examples include a method of laminating a hydrophilic polymer film and a nonwoven fabric, or a method of spraying or impregnating one side of a nonwoven fabric with a hydrophilic polymer. Hydrophilic polymers are water-soluble or water-swellable polymers, such as polyvinyl alcohol, carboxymethyl cellulose, methyl cellulose, sodium polyacrylate, and polyethylene oxide. Among these, polyvinyl alcohol is preferred.

A preferred embodiment of the nonwoven fabric in which a hydrophilic polymer is laminated on one side is as follows:
A spunbond nonwoven fabric obtained by fusion bonding with a weight of 1 to 20 denier and a weight of 15 to 40 g/n is laminated with polyvinyl alcohol on one side at a rate of 15 to 40 g/rd.

Any known net or rope may be used, but
If possible, it is preferably made of plastic in terms of corrosion resistance and light weight.

Further, in the present invention, a porous film may be further laminated on the outside of the hydrophilic polymer layer of the laminated nonwoven fabric to improve the durability of the laminated nonwoven fabric.

Claims (1)

[Claims] In an air house that is made of a synthetic polymer sheet and a net or rope that reinforces the sheet and is self-supporting due to internal pressure higher than atmospheric pressure, all or part of the side of the air house of the synthetic polymer sheet is coated with a hydrophilic polymer on one side. An air house characterized by being constructed from a synthetic fiber non-woven fabric laminated with molecules, and having a hydrophilic polymer layer placed on the outside.