JPH0739381U - Protective bag - Google Patents

Abstract

(57) [Summary] [Purpose] Work that provides the benefits of cold protection, frost protection, bird protection, etc., and does not remove the crops once they are attached, so it is easy to dispose of used bags after harvesting. In terms of aspects, it also provides a simplified protective bag. [Composition] A non-woven fabric made of biodegradable fiber, which is a protective bag formed by joining the non-woven fabric into a tubular or bag-like shape.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a horticultural protective bag made of biodegradable fiber, which is highly effective against cold, frost, and birds in fruit trees and flower trees. Here, the bird-prevention effect is the effect of preventing birds from pecking crops before harvest.

[0002]

[Prior art]

 In recent horticulture, with the development of transportation networks and storage warehouses, ripe crops (here, ripe crops are not harvested until the crop is fully ripe on the tree, but are harvested when fully ripe. Crops) are attracting attention as crops with high added value. However, unlike conventional crops, cultivation of this ripe crop requires special attention to bird protection as well as cold protection and frost protection. Until now, as a means for preventing cold, frost, and birds in these ripe crops, a method of covering the entire tree by using sheets such as woven and knitted fabrics, nonwoven fabrics, muscillo, and film in a house shape or a fence shape or The method of covering each fruit with a bag was adopted.

[0003]

[Problems to be solved by the device]

 In the method of covering the entire tree, the amount of cover sheet material used increases the production cost and the entire tree is covered, resulting in a large light-shielding effect, which results in a shortage of light and adversely affects the growth of the tree. It caused a decline in tree vigor. On the other hand, in the individual covering method of covering the individual fruits with bags, the work of covering the individual fruits with bags is time-consuming, which increases the production cost, and in many cases paper is used as the material for the bags. It had no water resistance and could not be used for bags until the weather was stable. In order to solve the above problems, bags made of woven and knitted fabrics and non-woven fabrics made of synthetic fibers have come to be used. However, since these synthetic fiber bags do not decompose when they are left in the garden after use, they must be collected and incinerated, which is troublesome and costly. It was such a thing.

The present invention is effective in preventing cold, frost, and birds in cultivating such ripe crops, and even if they are left scattered in the garden after use, they are decomposed by microorganisms in the soil, The purpose is to provide a protective bag that does not require time and effort for collection and incineration.

[0005]

[Means for Solving the Problems]

 The inventors of the present invention have arrived at the present invention as a result of intensive research to solve the above problems. That is, the gist of the present invention is a protective bag which is a non-woven fabric made of biodegradable fiber, and characterized in that the non-woven fabric is joined in a tubular shape or a bag shape.

Hereinafter, the present invention will be described in detail. The biodegradable fiber constituting the non-woven fabric of the present invention is a fiber that is completely naturally decomposed in soil, such as a natural fiber represented by cotton or hemp, or a cellulosic regenerated fiber such as acetate or cupra, Examples of synthetic fibers include fibers obtained from a thermoplastic polymer having biodegradability by an ordinary melt spinning method.

As a nonwoven fabric made of natural fibers that constitutes the protective bag of the present invention, a spunlaced nonwoven fabric of natural fibers made of cotton is suitable in terms of performance such as strength and flexibility and productivity. As for cotton, not only combed cotton and bleached cotton, but also fluff obtained from yarn or woven or knitted fabric may be used. Nonwoven fabrics made of natural fibers have excellent hygroscopicity and water absorbency, and are suitable for crops that do not want to have a sudden temperature change between daytime and nighttime during the ripe stage. The crop is covered with a protective bag made of the natural fiber non-woven fabric of the present invention. At this time, cover not only the crop but also the stem. On a sunny day, spray water on the surface of the protective bag so that it contains water. Although the temperature rises rapidly in the daytime, there is no sudden temperature rise in the protective bag because the moisture absorbed in the protective bag gradually evaporates. On the other hand, the temperature drops sharply at night, but the temperature does not drop sharply in the protective bag due to the heat retaining effect because the protective bag contains the water warmed by daytime sunlight. Tomatoes and Japanese mustard, etc. are examples of crops that do not like the sudden temperature changes between daytime and nighttime during the ripe season.

The thermoplastic polymer having biodegradability is an aliphatic polyester polymer, for example, a polymer composed of polyglycolic acid or polylactic acid such as poly (α-hydroxy acid), or a polymer thereof. And poly (ε-caprolactone), poly (ω-hydroxyalkanoates) such as poly (β-propiolactone), and poly-3-hydroxypropiolate, poly-3. -Hydroxybutyrate, poly-3-hydroxycaprolate, poly-3-hydroxyheptanoate, poly-3-hydroxyoctanoate, and these with poly-3-hydroxyxivalate and poly-4-hydroxybutyrate Poly (β-hydroxyalkanoate) such as copolymers of Examples of the polycondensate of glycol and dicarboxylic acid include polyethylene oxalate, polyethylene succinate, polyethylene adipate, polyethylene azelate, polybutylene oxalate, polybutylene succinate, polybutylene adipate, polybutylene sebacate, polyhexamethylene sebacate. , Polyneopentyl oxalate or copolymers thereof. Further, the above-mentioned aliphatic polyester, polycapramide (nylon 6), polytetramethylene adipamide (nylon 46), polyhexamethylene adipamide (nylon 66), polyundecanamid (nylon 11), polylaurolactamide ( Examples thereof include aliphatic polyester amide-based copolymers that are copolymers with aliphatic polyamides such as nylon 12) .In the present invention, thermopolymers other than those described above are used as the biodegradable thermoplastic polymer. Even a plastic polymer can be used as long as it has biodegradability.

The nonwoven fabric made of biodegradable thermoplastic synthetic fibers that constitutes the protective bag of the present invention has water repellency and sufficient strength for practical use. In particular, when the protective bag is required to have higher strength for the purpose of bird-prevention effect and the like, a protective bag made of a long fiber non-woven fabric made of a biodegradable thermoplastic synthetic fiber filament is suitable. When the protective bag is required to have high strength and flexibility, a protective bag made of a short fiber non-woven fabric made of biodegradable thermoplastic synthetic fiber is suitable.

The non-woven fabric constituting the protective bag of the present invention may be a non-woven fabric composed of biodegradable thermoplastic synthetic fibers, natural fibers, regenerated cellulose-based fibers alone or a blend of these. The biodegradable fiber may be appropriately selected according to the performance required by the crop to be protected.

The basis weight of the nonwoven fabric constituting the protective bag of the present invention is preferably 10 to 100 g / m ² . When the basis weight of the non-woven fabric is less than 10 g / m ² , the light transmittance is excellent, and the protective bag is flexible, but the strength is low, and in particular, it has a bird-preventing effect to prevent birds from plucking fruits. Inferior in heat retention. When the basis weight of the non-woven fabric is more than 100 g / m ² , it is excellent in terms of cold protection, bird protection and light-shielding properties, but the light transmittance is reduced, which is not preferable for crops that require coloring with light rays. .

Regarding the single yarn fineness of the non-woven fabric constituting the protective bag of the present invention, 1 to 6 denier is preferable for the biodegradable thermoplastic synthetic fiber. When the single yarn fineness is less than 1 denier, it is effective for cold protection, frost protection, and bird protection, but since the non-woven sheet becomes dense, the light transmittance decreases, so it is not suitable for crops that require coloring with light rays. Become. On the other hand, if the single yarn fineness exceeds 6 denier, the texture of the non-woven fabric becomes stiff, and when the protective bag is covered on the branches, the flexibility of the protective bag is poor at the time of wearing, which is not preferable because it may damage the branches or the crop.

Regarding the cross-sectional shape of the biodegradable thermoplastic synthetic fiber forming the non-woven fabric, any of atypical cross-sections such as circle, hollow or flat, and triangle can be used. In the case of flat yarn, the greater the flatness (ratio of the length in the longitudinal direction of the fiber cross section to the length in the width direction), the greater the light transmittance. This indicates that when the flatness ratio is high, the ratio of sunlight passing through the inside of the fiber increases, so that even if the fibers have the same basis weight, the same single yarn fineness and the same weight, The light transmittance varies depending on the cross-sectional shape. Therefore, non-woven fabrics using flat yarn are used for crops that require sunlight after fruiting, and non-woven fabrics with a circular cross section are appropriately used for crops that do not require much sunlight, to prevent cold, frost, and frost. Not only is it effective against birds, but it also makes it possible to improve the coloring of crops even when they are covered.

The non-woven fabric made of biodegradable fiber is joined in a tubular shape or a bag shape to form a protective bag of the present invention. Examples of the joining method include a resin adhesive application method using a hot melt agent or the like, and a mechanical joining method such as entanglement between fibers by a water jet or the like and stitch processing such as suturing with a cotton thread or the like. In the case of thermally bonding a nonwoven fabric made of biodegradable thermoplastic synthetic fiber, a heat bonding method using a heat calendar roll, an ultrasonic fusing machine, a heat sealing machine or the like can be used. The joining method is not limited, and the above-mentioned joining method is appropriately selected, and the ends of the non-woven fabric are entirely joined in a band shape or discontinuously dot-joined to form a tubular or bag-shaped protective bag of the present invention. And

The size of the protective bag of the present invention may be appropriately determined in consideration of the size of the branches of the crop to be covered and the size when the crop is mature.

Next, the protective bag of the present invention will be described with reference to the drawings. 1 and 2 each show an embodiment of a protective bag (1) over a branch. FIG. 1 is a schematic perspective view showing an example of a tubular protective bag of the present invention. The tubular protective bag shown in FIG. 1 is made of a non-woven fabric (2) made of biodegradable fiber, and the ends of the non-woven fabric are joined together in a band shape (3) to form a tube. The tubular protective bag can protect the crops growing in the middle of the branches without covering the ends of the branches. FIG. 2 is a schematic perspective view showing an example of a bag-shaped protective bag of the present invention. The bag-shaped protective bag shown in FIG. 2 is made of a non-woven fabric (2) made of biodegradable fiber, and the end of the non-woven fabric is discontinuously dot-joined (4) to form the bag. ing. Bag-shaped protective bags are suitable for covering the crops growing on the ends of branches. FIG. 3 is a perspective view showing an embodiment in which the protective bag of the present invention is coated on each branch of a fruit tree. In order to prevent the protective bag from being blown off by wind or the like, the mouth of the protective bag may be tied when the fruit tree branches are covered with the protective bag.

[0017]

[Action]

 The protective bag of the present invention, which is processed into a tubular shape or a bag shape, is composed of a non-woven fabric made of biodegradable fibers, so used bags are decomposed in the natural world and do not need to be collected or incinerated. It does not pollute, and it does not take much time and money to collect it. Further, the protective bag of the present invention having the above-mentioned configuration has a simple shape and can easily cover the fruit produced by each branch in a gathered state, compared to the case of individual packaging with paper. Labor can be reduced. Since the covering can be done in units of branches, the tree vigor does not weaken due to shading, and even for ripe fruits that require light rays at the ripe stage to improve coloring, the cross-sectional shape and basis weight of the fibers that make up the nonwoven fabric It is possible to give sufficient translucency by taking into consideration. On the other hand, not only against the cold and frost, but also against the birds that prevent the birds from plucking the fruits, the nonwoven fabric is excellent in strength and can sufficiently exert its effect.

[0018]

[Effect of device]

 In this way, the protective bag of the present invention can be attached once and not removed until harvesting, and as well as being cold and frost-proof, it also has a bird-prevention effect that prevents birds from picking fruits, and used bags cannot be used. It is decomposed in nature and does not require recovery, incineration, etc., it does not pollute the global environment, it does not require labor and cost, and it is also simple in terms of work, increasing yields and reducing production costs. It is a connected fruit gardening material.

[Brief description of drawings]

FIG. 1 is a schematic perspective view showing an example of a tubular protective bag of the present invention.

FIG. 2 is a schematic perspective view showing an example of a bag-shaped protective bag of the present invention.

FIG. 3 is a perspective view showing an embodiment in which the protective bag of the present invention is coated on each branch of a fruit tree.

[Explanation of symbols]

 1: Protective bag 2: Non-woven fabric made of biodegradable fiber 3: Whole joint part 4: Point joint part

 ─────────────────────────────────────────────────── ─── Continuation of front page (72) Creator Eiji Okumura 23 Uji Kozakura, Uji City, Kyoto Prefecture Unitika Ltd. Central Research Laboratory

Claims (3)

[Scope of utility model registration request] 1. A non-woven fabric comprising biodegradable fibers,
A protective bag, wherein the non-woven fabric is joined in a tubular shape or a bag shape. 2. The biodegradable fiber is a natural fiber.
Protective bag described. 3. The protective bag according to claim 1, wherein the biodegradable fiber is made of a biodegradable thermoplastic polymer.