JPH11196679A - Sunshade sheet - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a sunshade sheet used for inside curtain of agricultural house, in which air permeability, infrared ray reflecting property, light shielding property and productivity are full-equipped. SOLUTION: This sunshade sheet is equipped with a A tape 1 for warp 1 obtained by subjecting a film having >=80% light shielding ratio to slit processing, a B tape 2 for warp obtained by subjecting a film having <=40% light shielding ratio to slit processing and a C tape 3 for weft obtained by subjecting a film having <=40% light shielding ratio to slit processing and A region 4 comprising A tape 1 and C tape 3 is woven into twill weave and B region 5 comprising B tape 2 and C tape 3 is woven into plain weave or twill weave.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a sheet used as a sunshade in house cultivation in the case of intense solar radiation in summer or the like. More specifically, the present invention relates to a sheet having a beautiful planar shape and excellent air permeability and infrared reflectivity. In addition, the present invention relates to a shade sheet capable of keeping a covered internal space (hereinafter, referred to as a coating system) cool.

[0002]

2. Description of the Related Art In recent years, institutional cultivation such as house cultivation and tunnel cultivation has been actively carried out with the aim of increasing the value of agricultural crops such as annual harvest. In this facility cultivation, for example, house cultivation, basically, in the daytime, when the heat absorbed into the ground in the house by the sunlight is radiated from the ground as wide heat radiation at night, this is shielded by the covering material Alternatively, the temperature in the house is kept higher than the outside air by the reflection, thereby promoting the crops in the house.

However, in such house cultivation, it is sometimes necessary to shield the house from sunlight. Taking this as an example of cultivation of the aunt (leaf perilla), the aunt, which has been conventionally cultivated in the open field, has recently become indispensable to harvest on the anniversary, and cultivation in an agricultural house has become mainstream. The aunt has the advantage that it has a strong vitality and does not require special cultivation management, but it requires a great deal of labor during harvesting, and especially in the summer, the harvesting work, combined with the high temperature environment in the house, necessitates extremely heavy labor.

[0004] As means for solving such an obstacle, a skylight or a side window is opened for ventilation of high-temperature air in a house during a harvesting operation in the summer, and a sunshade sheet is provided with a lining curtain as described above to avoid high sunlight. It has been devised such that it can be detachably deployed in the house.

[0005]

Conventionally, as a sunshade sheet used for such an application, a light-shielding sheet which can suppress the amount of sunlight transmitted into the coating system and sufficiently secure the illuminance (brightness) required for the work has conventionally been used. 90% (degree of light blocking of light in all wavelength ranges)
Materials of a certain degree are frequently used, and specific examples of the actual material include a tarpaulin sheet or a light-shielding film.

As a light-shielding element for such a sheet or film, a black pigment such as carbon black and a metal pigment (or foil) such as aluminum are mainly used. It has become known that the effect of the pigment (or white foil) is high, and white materials are also used.

[0007] However, the tarpaulin sheet and the film have little air permeability, and when they are used, the temperature rise in the coating system can be suppressed, but the air heated to a high temperature stays in the coating system. However, there is a major drawback in that the temperature inside the coating system rises within a long working time, and the inside of the coating system, which is the working environment, cannot be kept cool. In addition, those composed of only white materials do not provide sufficient light-shielding properties, and similarly, it is almost impossible to keep the inside of the coating system cool.

[0008] A requirement for a shade sheet for a lining curtain used in an agricultural house is that the shade sheet has an appropriate light-shielding rate. High infrared reflection (heat insulation). Although it has breathability and a function of discharging high-temperature air to the outside of the coating system, the sunshade sheet provided conventionally did not satisfy such requirements and was unsatisfactory for the user.

The present invention has been made to solve the above-mentioned problems of the prior art, and an object thereof is to provide a novel sunshade sheet which can substantially satisfy the above-mentioned requirements required for the sunshade sheet for an agricultural house. Is what you do.

[0010]

To achieve the above object, the present invention has the following arrangement. That is, the invention described in claim 1 is a warp A tape obtained by slitting a film having a light blocking ratio of 80% or more, a warp B tape obtained by slitting a film having a light blocking ratio of 40% or less, It consists of a C tape for weft obtained by slitting a film with a light shielding ratio of 40% or less, and a predetermined number of A tapes and B tapes are alternately and repeatedly arranged in the weaving width direction.
The area of tape A and tape C is twilled, tape B and tape C are
A shade sheet is characterized in that a region formed by a tape is woven in a plain weave or a twill weave.

According to a second aspect of the present invention, in the configuration of the awning sheet according to the first aspect, the warp A tape is specified, and the warp A tape is made of a synthetic resin film as a base material. It is a tape obtained by slitting a film which has been made silver by a vapor deposition layer or a metal foil layer.

According to a third aspect of the present invention, there is provided a sunshade sheet according to the first or second aspect, further comprising:
The tape and / or weft C tape are specified. The warp B tape and / or weft C tape are tapes obtained by slitting a white film obtained by kneading or coating a white pigment on a synthetic resin film. It is characterized by having.

[0013]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, specific embodiments of the present invention will be described with reference to the accompanying drawings. FIG. 1 is a woven fabric diagram showing one embodiment of the present invention, and FIG. 2 is a woven fabric diagram showing another embodiment of the present invention.

The woven fabric of the embodiment shown in FIG. 1 has a predetermined number (eight in the figure) of warp A tapes 1 and a predetermined number (two in the figure).
The warp B tape 2 is alternately and repeatedly arranged in the weave width direction to form a warp group, and this is combined with the weft group of the weft C tape 3. A group of A tape and C tape 3
The structure of the A region 4 composed of groups is a twill weave (oblique weave), and the structure of the B region 5 composed of two groups of B tapes and three groups of C tapes is formed in a plain weave.

As is well known, a twill weave is a fabric made by reducing the degree of crossing between warp and weft as compared with plain weave and making the floating length of the warp or weft relatively large. To form Such twills reduce the tightness of the fabric compared to plain weaves. By reducing the number of intersection points, a considerably large weave (void) can be formed. Various patterns are created by varying the length of the float. Having the performance as described above, the A region 4 of the embodiment shown in FIG. 1 also has such characteristics. In addition, the twill weave in the area A 4 shown in FIG. 1 is a two-square twill weave, but is not limited thereto. obtain.

As the warp A tape 1 constituting the sheet of this embodiment, a tape obtained by slitting a film having a light blocking ratio of 80% or more is used. If the light-shielding ratio is less than 80%, the sunshade effect becomes insufficient, and the object of the present invention cannot be achieved. As such a tape, a tape obtained by slitting a film which has been made silver (metal surface) with a metal vapor-deposited layer or a metal foil layer using a synthetic resin film as a substrate is preferable.

The above-mentioned grained film A
As the tape 1, a vapor deposition tape obtained by subjecting a synthetic resin film to a metal vapor deposition process of aluminum or the like and further slitting a vapor deposition film provided with a synthetic resin film on a vapor deposition layer can also be suitably used.

An example of such a vapor deposition tape is, for example,
On a surface of a 10 μm to 50 μm uniaxially stretched synthetic resin film formed by a known manufacturing method, a metal such as aluminum is deposited with a thickness of 300 to 700 Å, and a known method such as extrusion lamination or dry lamination is further performed on the vapor deposition layer. This is obtained by laminating a synthetic resin film having a thickness of 10 μm to 40 μm as a raw material by a known coating method such as lamination or dipping, and slitting the vapor-deposited film into a tape having a required width.

As the warp A tape made of a grained film, a metal foil such as aluminum having a thickness of 5 μm to 30 μm is laminated on a synthetic resin film as a base material by a known means instead of the above-mentioned vapor deposition processing. If necessary, a tape obtained by forming a multi-layer composite film on which a synthetic resin film is laminated and slitting it into a required width may be used.

The B tape 2 for warp and the C tape 3 for weft constituting the sheet of this embodiment have a light shielding ratio of 4%.
A tape obtained by slitting a film of 0% or less is used. If the light-shielding ratio exceeds 40%, the illuminance in the coating system becomes insufficient, and one object of the present invention cannot be achieved.
Such a tape can be used as the warp B tape 2 or the weft C tape 3, but a tape obtained by slitting a film having a light blocking ratio of 40% or less and having excellent infrared reflectivity is used. More preferred. In particular, performance excellent in infrared reflectivity is more strongly required for the weft C tape 3.

As an example of the warp B tape 2 and the weft C tape 3, a tape obtained by slitting a white film obtained by kneading or coating a white pigment on a synthetic resin film is preferably used. The B tape 2 and the C tape 3 are, specifically, a synthetic resin film formed by kneading a white pigment such as titanium oxide, for example, 2 to 15 parts of a white pigment per 100 parts of a synthetic resin base resin. It is obtained by kneading and forming a synthetic resin film as a material and slitting it into a tape of a required width.

As the above-mentioned white pigment, in addition to the above-mentioned titanium, a white pigment having a high infrared reflectance such as alumina, zinc sulfide, zinc oxide, lead white and white carbon can be used.

The shapes of the warp A tape 1, the warp B tape 2, and the weft C tape 3 vary depending on the shading ratio, strength, weaving composition, folded state after weaving, and use state of the obtained awning sheet. The thickness is appropriately set in consideration of, for example, the thickness is 10 μm to several hundred μm, and the width is 1 mm to several tens m.
The range of m is appropriate.

The embodiment shown in FIG. 1 uses the A tape 1 having a high light blocking ratio and the B tape and C tape having a low light blocking ratio as described above. Weaving the plain weave areas of low area, the ratio of these areas can be changed appropriately, and the shading rate of the entire sheet can be controlled by changing the structure itself of each area, so that a sheet having a desired function can be easily obtained. Can be done.

As described above, the twill weave region imparts high air permeability to the sheet, and the plain weave region contributes to the shape stability of the entire sheet. That is, if the entire sheet is formed only of twill weave, there is an obstacle that the entire sheet is twisted due to loose connection, but the plain weave region functions as a framework to stabilize the form.

Next, FIG. 2 in which the entire structure is formed only by twill weave
The embodiment shown in FIG. This embodiment is shown in FIG.
A tape 1 for warp, B tape 2 for warp and C tape 3 for weft which are the same as the embodiment shown in FIG.
Is the same twill weave (oblique weave). However, the structure of the B region 5 is replaced with a plain weave and woven on the same twill as the A region 4.

The awning sheet of the present invention is usually used as a lining curtain for a house and mounted on a laid wire. When the curtain is opened and closed, the curtain and the wire may be rubbed. As a result, it becomes easier for “sway” to occur. Such tape "Yure"
The embodiment shown in FIG. 1 in which the B region 5 is formed in a plain weave in order to prevent the occurrence of the "skew" is effective as described above.

However, even in the twill structure, it is possible to slightly prevent the tape from being twisted by increasing the weaving density while ignoring the material cost to some extent. As shown in FIG. By forming, there is an advantage that the operation of each member of the loom can be simplified. Hereinafter, the present invention will be described more specifically with reference to examples.

[0029]

EXAMPLE A 500 .ANG. Thick aluminum film was deposited on one side of a 25 .mu.m thick uniaxially stretched high density polyethylene (HDPE) film formed by adding 3 parts by weight of a benzophenone UV absorber. After laminating a medium-density polyethylene film having a thickness of 15 μm to which 3 parts by weight of a benzophenone-based UV absorber was added, slitting was performed to a width of 3 mm to obtain an A tape 1 for warp. The light shielding ratio of the warp A tape 1 was 99%.

On the other hand, 4 parts by weight of a rutile type titanium oxide pigment,
A 25 μm thick uniaxially stretched high density polyethylene (HDP) formed by adding 3 parts by weight of a benzophenone UV absorber
E) After slitting the film to a width of 8 mm, the film was heat-set and thermally contracted to obtain white B tape 2 for warp and C tape 3 for weft. In addition, both tapes 2 and 3
Was 27%.

Next, as shown in FIG. 1, a warp group is formed by arranging a plurality of units until a predetermined width is reached using a combination in which eight A tapes 1 and two B tapes 2 are continuously arranged in parallel as a basic unit. And the weft C tape 3 is
Weaving at a weave density of 0 / inch, weaving a four-layer oblique twill weave in A area 4 where A tape 1 and C tape 3 intersect, and a plain weave in B area 5 where B tape 2 and C tape 3 intersect. Thus, a shade sheet having an overall light blocking ratio of 90% was obtained.
This was used as a lining curtain for an agricultural house.

In the sunshade sheet obtained in this embodiment, the twill areas are regularly arranged between the strip-shaped white plain weave areas arranged at equal intervals, and the twill areas are hatched in appearance. There was a pattern and the design was excellent. When this was used as a lining curtain, a striped light-shielding band and a light-entering band were observed through the sunlight, and exhibited a beautiful appearance.

In the sunshade sheet according to the present embodiment, the twill weave area where the friction between the warp yarns is small and the plain weave area where the friction is large are alternately and regularly arranged. Has the advantage that the texture is not significantly deformed because it stops at the plain weave portion where the friction is large.

Further, the sheet obtained by this embodiment is:
Naturally, it has the effect of keeping the inside of the coating system cool because it has air permeability and infrared reflectivity.

[0035]

As described above, the awning sheet according to the present invention has the following effects as compared with the existing awning sheet according to the prior art. That is, since most of the woven fabric is made of twill weave, the air permeability is high. When this is installed near the ceiling in the coating system, high-temperature air naturally passes through the sheet and is easily discharged out of the system. Can be done. Since the structure is simple, it is possible to easily produce a sheet in which the brightness in the coating system is adjusted according to the time of use and the intended use, and it is easy to control the light blocking rate in the coating system. Since the component material is tape yarn, the number of shots per inch is small, the production speed is high, and as a result,
It can be produced at low cost. Further, when a material having a high infrared reflectivity is used, the heat shielding property is further enhanced, and the rise in temperature in the coating system can be strongly suppressed. The above-mentioned effects are exhibited and greatly contribute to house cultivation. In addition, the light blocking ratio described in this specification is JI
It is a value calculated by the measuring method A in the plastic optical property test method specified in SK7105.

[Brief description of the drawings]

FIG. 1 is a woven fabric diagram showing one embodiment of a sunshade sheet according to the present invention.

FIG. 2 is a woven fabric diagram showing another embodiment of the sunshade sheet according to the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 A tape for warp 2 B tape for warp 3 C tape for weft 4 A area 5 B area

 ────────────────────────────────────────────────── ─── Continuing on the front page (72) Inventor Eisei Ohiro 1366 Komahane, Sowa-cho, Sarushima-gun, Ibaraki Pref. Inventor Kiyoo Ishii 4-1 Nihonbashi-Kofuna-cho, Chuo-ku, Tokyo In-house (72) Inventor Yoshihiro Sunayama 4-1 Nihonbashi-Kofuna-cho, Chuo-ku, Tokyo In-house

Claims (3)

[Claims] 1. A warp A tape obtained by slitting a film having a light blocking ratio of 80% or more, a warp B tape obtained by slitting a film having a light blocking ratio of 40% or less, and a light blocking ratio of 40% or less It consists of a C tape for weft obtained by slitting the film of, and a predetermined number of A tapes and B tapes are alternately and repeatedly arranged in the weaving width direction,
The area of tape A and tape C is twilled, tape B and tape C are
A awning sheet, wherein the area formed by the tape is woven in a plain weave or a twill weave. 2. The awning sheet according to claim 1, wherein the warp A-tape is a tape obtained by slitting a film obtained by graining a metal-deposited layer or a metal foil layer using a synthetic resin film as a base material. 3. The awning sheet according to claim 1, wherein the B tape for warp and / or the C tape for weft is a tape obtained by slitting a white film obtained by kneading or coating a white pigment on a synthetic resin film. .