JPH10165010A - Paper hood for grape - Google Patents

Abstract

PROBLEM TO BE SOLVED: To effectively save labor by unnecessitating replacement of paper hood and to stabilize merchandise value by fixing the color of grape even in the year of weather fluctuation. SOLUTION: A paper hood 1 is square-shaped and has a slit from its periphery to its central part, the material is nonwoven fabric bonding the long fibers of synthetic resin in high density, the reflectivity of light is more than 90%, and the absorptivity of light is less than 1%. The paper hood 1 is fitted to a vine G1 of grape G while opening the slit 11 and in the state of positioning this vine at the top end of slit, both the side parts of this slit are overlapped and closed in conical state by a staple 2. Even when the paper hood 1 is irradiated with direct sunlight, the temperature of grape G does not rise, sunburn trouble does not occur, coloring is sufficient, and the fluctuation of coloring caused by the fluctuation of weather is extremely reduced.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to grapes, and in particular to cap paper for grapes of the tassel system.

[0002]

2. Description of the Related Art Conventionally, cap paper for protecting grape has been used for grape cultivation. One of the reasons is to prevent the fruit powder adhering to the surface of the grape from being lost due to a surfactant or the like contained in the pesticide when the pesticide is sprayed, thereby preventing a reduction in commercial value. Furthermore, prevention of damage caused by wild birds grabbing grapes,
The purpose is to protect the grapes from rain and prevent the commercial value from being reduced. The following points are also important for grape cultivation. The first factor to improve the color of the grape is the August temperature, especially when cultivating varieties of European varieties such as red Kaiji, Ruby Okuyama, Seseki, Black Kyoho and Pione. The second is that the sunlight is sufficiently irradiated at the time of harvest. For this reason, grape growers have traditionally protected the grape with paraffin paper before the rainy season in June, and in September, when the grape was cool, the grape was sufficiently irradiated with sunlight. The material is replaced with cellophane paper, for example.

[0003]

However, even if the cover paper is replaced, the coloring is not constant but unstable depending on the temperature of the year, and the commercial value fluctuates. Furthermore, even a person who is accustomed to changing the cover paper is limited to about 5 ares per day, so it is a fact that a large amount of labor is required to replace the cellophane paper.

[0004] Therefore, an object of the present invention is effective for labor saving of labor, since it is not necessary to change the cover paper, and even in the year of climate change, the coloring can be kept as constant as possible without causing sunburn failure of grape. Another object of the present invention is to provide grape cap paper that can stabilize commercial value.

[0005]

A feature of the present invention is a sheet having a shape capable of covering grape, and the material of the sheet is a non-woven fabric in which synthetic resin long fiber filaments are bonded at high density. The light reflectance is 90% or more and the light absorption is 1% or less.

[0006]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Referring to the drawings, an embodiment of the present invention will be described. As shown in FIG. 1, a cap paper 1 having a shape covering a grape is a square having a side of 25 to 30 cm. It has a slit 11 from the periphery of the cover paper to the center. The material of this cap paper is a nonwoven fabric in which synthetic resin long fiber filaments are bonded at a high density, and has a light reflectance of 9%.
At 0% or more, the light absorption is 1% or less.

Therefore, the material of the cap paper 1 will be specifically described. This cap paper is made of a non-woven fabric (for example, “Tyvek” manufactured by DuPont) in which synthetic resin long fiber filaments are bonded at a high density by flash spinning or the like. Product name)
The nonwoven fabric has excellent characteristics such as a light reflectance of 90% or more and a light energy absorption of 1% or less. For example, Tyvek 1422A has a light reflectance of 91.30% or more and a light energy absorption of 0.8.
It is 3% and the light transmittance is 7.87%, which is excellent in characteristics that the light reflectance is high and the light absorptivity is low. In addition, this numerical value shows the average value of the reflectance at all wavelengths of light, etc., and is based on the experiment of the Flowering Control Laboratory of the Vegetable and Tea Research Institute of the Ministry of Agriculture, Forestry and Fisheries.

The cover paper 1 has a higher density than other non-woven fabrics formed by, for example, a melt blow method or a spun bond method. Therefore, the cover paper 1 used in the present invention has water pressure resistance, moisture permeability and the like. Is also excellent. In addition, the cover paper 1 has a weight in the range of 40 to 150 g per square meter, and has a water pressure resistance of 500 to 3000, which indicates water pressure resistance.
mm (according to JIS-L1092A method-low water pressure method), the moisture permeability indicating moisture permeability is 3000 to 7000 g / m.
Is a ^2/24 hours (according to JIS-Z-0280 correcting method). Further, the cover paper 1 has an air permeability indicating its air permeability (air permeability) of 8 to 80 S / 100 CC (JIS-P8117B).
Depending on the type). As a synthetic resin constituting the nonwoven fabric of the material of the cap paper 1, polyethylene, polyolefin, particularly high-density polyolefin is preferable, but a copolymer with polypropylene or polyolefin can also be used. If necessary, add a conversion agent such as an ultraviolet absorber,
Improving durability is desirable.

The nonwoven fabric of the material of the cap paper 1 is obtained by randomly depositing and bonding long fiber filaments by a direct spinning method in which spinning, drawing, opening and bonding steps are continuously performed. To explain a specific example, first, a spun bond method in which a spinnable thermoplastic resin is charged into an extruder to be in a molten state, and the fiber extruded from a spinning nozzle is drawn into a drawn fiber by a roller method or an air jet method. The second is a non-woven fabric by a melt blow method in which a molten resin is jetted from a spinning nozzle together with a high-pressure gas flow into a drawn fiber, and the third is a method in which a spinnable thermoplastic synthetic resin is pressed against a solvent at a high temperature. There is a nonwoven fabric by a flash spinning method in which a solution dissolved in the above is discharged into the atmosphere through a spinning nozzle, and the solvent is vaporized to form a fiber. This flash method uses a solution obtained by dissolving a synthetic resin such as high-density polyethylene or polypropylene in a low-boiling solvent such as halogenated hydrocarbon, aromatic hydrocarbon, or aliphatic hydrocarbon under high temperature and pressure. It is released to the atmosphere at low temperature and low pressure through a spinning nozzle provided with a pressure drop chamber while pressurized, and the solvent instantaneously evaporates to give orientation to the fiber by its expansion force. The resulting nonwoven fabric is particularly excellent in water resistance and moisture permeability.

Then, as shown in FIG. 2, the cap paper 1 is fitted into the vine G1 of the grape G by opening the slit 11 of the cap paper, and the vine is positioned at the tip of the slit.
The two sides of this slit are overlapped, made into a conical state, and closed with a stapler 2 as a connecting means so as to cover the grape.

As a result, the temperature of the grape does not rise even if the shade paper is irradiated with direct sunlight, and the sun rays necessary for coloring without causing sunburn are radiated to the grape through this shade paper. Therefore, there is very little color change due to climate change, and there is no change in commercial value.
There is no need to change the cover paper as in the past. When grape is harvested, the cap paper can be easily recovered by pulling the overlapped portion of the cap paper, and the cap paper can be used four or five times, and is economical.

[0012]

According to the present invention, since the cap paper has a high light reflectance, the temperature of the grape does not increase even if the cap paper is irradiated with direct sunlight, and the sun rays necessary for coloring pass through the cap paper. Irradiation, so that it is sufficiently colored without causing sunburn, and it is effective to save labor because it is not necessary to change the cap paper, and coloring is constant even in the year of climate change. The commercial value is stable, and the nonwoven fabric is stronger than conventional paraffin paper or cellophane paper, so that it can be prevented from attacking wild birds and has a high light reflectivity. In addition, the cover paper is extremely economical because it can be collected and used several times.

[Brief description of the drawings]

FIG. 1 is a front view of a cap paper.

FIG. 2 is a perspective view showing a state in which grape is covered with cap paper.

[Explanation of symbols]

 1 cover paper 11 slit 2 connecting means (staplers)

Claims (1)

[Claims] 1. A sheet covering a grape, wherein the material of the sheet is a nonwoven fabric in which long fiber filaments of synthetic resin are bonded at a high density, and has a light reflectance of 90% or more and absorbs light. A grape cap paper having a rate of 1% or less.