JPH0833431A - Production of agricultural/horticultural sheet and tree-raising pot molded therefrom - Google Patents

Abstract

PURPOSE:To produce a tree-raising pot with no concern for causing root rot, simple in disposal thereof when became useless, also making a tree transplanta tion as a cause of tree decay unnecessary, and to obtain the subject sheet as a molding material for the pot. CONSTITUTION:Firstly, needle juniper fibers are mutually thinly laminated in a mat-shaped fashion to form into a fibrous material 3. The surface of the fibrous material 3 is then provided with biodegradable plastic granules 2...2 so as to be dispersed uniformly. The resultant laminate is then fed in the arrow direction under compression by two rollers whose one 4 has a heating means and the other 4a without such a means. During this process, the biodegradable plastic granules 2...2 are melted by the roller 4 and infiltrated into the fibrous material 3, which is then herdened under compression into the objective agricultural/horticultural sheet 1. This sheet 1 is assembled through a pattern- draw trimming and molded into the objective tree-raising pot.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for producing a biodegradable agricultural and horticultural sheet used in the agricultural and horticultural field, and a tree growing pot formed therefrom.

[0002]

2. Description of the Related Art There are a wide variety of tree growing pots or seedling growing pots used in the field of agriculture and horticulture. There are many pots made from peat moss, recycled paper, vinyl chloride, and polyethylene, as well as traditional unglazed pots. Those made with peat moss and recycled paper are susceptible to water and can break if carried repeatedly. Therefore, these days, vinyl chloride
Tree-growing pots made by press-molding polyethylene resin sheets have come into wide use.

However, when pots made by press-molding vinyl chloride or polyethylene resin sheets are used for raising seedlings, these pots have no air permeability and water permeability, so if too much water is used, the holes under the pots will be blocked. , The seedlings may rot and die.

[0004] In addition, seedlings grown in an unglazed or polyvinyl chloride / polyethylene growing pot need to be transplanted to a wide field until the roots grow to some extent to fill the pot. It is difficult to take out each one and transplant it to the field, and at the time of transplanting, the root may be damaged and die.

[0005] Furthermore, after transplanting the seedlings into the fields, tree growing pots are no longer necessary, but unless they are reused, tree growing pots made of vinyl chloride or polyethylene resin are difficult to dispose of. For example, when buried in the ground, it does not spoil naturally, but if incinerated, it emits harmful gas, black smoke and high heat, polluting the environment and harming the health of people living nearby, or incineration. The furnace may be damaged.

[0006] Therefore, it has been long awaited to provide a tree-growing pot without the above-mentioned drawbacks.

[0007]

DISCLOSURE OF THE INVENTION The present invention was proposed in view of the above problems, and there is no fear of root rot, easy disposal when it is no longer needed, and one of the causes of death. The purpose of the present invention is to propose a method for producing a tree-growing pot that does not require transplantation, and an agricultural / horticultural sheet as a molding material for the tree-growing pot.

[0008]

According to a first aspect of the present invention, there is provided a method for manufacturing an agricultural and horticultural sheet, wherein a powder or a powder is added to a sheet fiber material obtained by laminating a fiber material in a thin and muscular form. A means was used in which granular biodegradable plastic was supplied so as to be uniformly dispersed, and heated and compressed in the thickness direction.

In order to solve the above problems, in the method for producing a sheet for agricultural and horticultural use according to claim 2, a powder or granular biodegradable plastic is uniformly mixed into a fiber material to form a thin muscillo shape. It was laminated on the substrate and heated and compressed in the thickness direction to form the layer.

Further, in the tree growing pot according to the third aspect, in order to solve the above-mentioned problem, the agricultural and horticultural sheet obtained by the production method according to the first or second aspect is cut out, shaped and assembled. And a means for molding into a pot shape was used. The fibers constituting the sheet fiber material may be natural fibers or recycled fibers such as copper ammonia rayon and viscose rayon.

[0011]

In the method for producing a sheet for agricultural and horticultural use according to the first aspect, the sheet fiber material is formed by thinly stacking the fiber materials in a muscillo shape. After the powder or granular biodegradable plastic is supplied on the surface so as to be uniformly dispersed, it is compressed while heating in the thickness direction to form an agricultural and horticultural sheet.

In the method for manufacturing an agricultural and horticultural sheet according to the second aspect, powder or granular biodegradable plastic is uniformly mixed with the fiber material. After laminating it thinly in a slim shape, it is compressed while heating in the thickness direction to form an agricultural and horticultural sheet.

[0013] In the tree growing pot according to claim 3,
The agricultural and horticultural sheet obtained by the method of claim 1 or 2 is cut and shaped, and then assembled into a pot and formed.

[0014]

The present invention will be described in detail below with reference to the drawings showing the embodiments. 1 is a perspective view of a manufactured agricultural and horticultural sheet, FIG. 2 is a partially enlarged sectional view of the agricultural and horticultural sheet,
FIG. 3 is an explanatory diagram of a method for manufacturing an agricultural and horticultural sheet.

1 to 3, 1 is an agricultural and horticultural sheet formed by heating and compressing a sheet fiber material using a large number of biodegradable plastic particles, 2 is a biodegradable plastic particle, and 3 is a natural palm tree A sheet-shaped fiber material, 4 is a roller for heating and compressing. The biodegradable plastic granules 2 used in this embodiment are mainly composed of starch, have melt flowability and thermoplasticity, and have a melting point of about 140 ° C. Moreover, even if it is incinerated, no harmful gas is generated.

Next, a method of manufacturing the agricultural and horticultural sheet 1 will be described. First, granular biodegradable plastics 2 ... 2 are uniformly dispersed and scattered on the upper surface of the fiber material 3. This is inserted between the rollers 4.4a of FIG. The roller 4 rotates in the direction of the arrow while keeping the temperature of the roller surface at about 180 ° C. to melt the biodegradable plastic particles 2 ... 2 one after another, and at the same time, compresses the fiber material 3 together with the roller 4a. . At this time, the melted biodegradable plastic is
, And gathers at the points where the palm fiber 3a and the palm fiber 3a intersect with each other due to the capillary phenomenon as shown in FIG.
Solidify it. Eventually, the fibrous material 3 is compressed and remains in a thin plate shape, and is cooled and solidified to form the agricultural and horticultural sheet 1. Here, 2a is a hardened biodegradable plastic.

Next, a method for forming the tree-growing pot 5 shown in FIG. 5 from the agricultural and horticultural sheet 1 will be described with reference to the development diagram of the tree-growing pot shown in FIG. First, the agricultural and horticultural sheet 1 is cut to obtain a fan-shaped developed view 6 of FIG. Here, 6b is a margin at the side of the tree growing pot 5. Tree-growing pot 5
In order to make the bottom portion of the fan-shaped development, the notches 7 are made at the three places in the fan-shaped development view 6. The cuts 7 form four substantially square tongue pieces 6a. Assembling is performed by winding a fan-shaped development diagram 6 into a cylindrical shape, stacking these four tongue pieces 6a at the bottom, and fastening the overlapped four with a staple or a biodegradable plastic thread. Finally,
Overlap the margins and tie it with the staple 8 or a thread made of biodegradable plastic and fasten it.

The soil is put into the tree-growing pot 5 made by the above method, seeds are sown there, and seedlings are grown. When the seedlings have grown to a certain extent, they are buried in the fields together with the tree-growing pots 5 and planted. The embedded tree-growing pot 5 is eventually decomposed by bacteria in the soil, and the roots of the seedlings planted in the tree-growing pot 5 can grow greatly. Furthermore, when natural fiber is used as a fiber material, it rots and becomes a nutrient for the seedlings.

FIG. 4 is an explanatory view of another embodiment of the method for manufacturing an agricultural and horticultural sheet according to the present invention. First, a large number of biodegradable plastic particles 2b... 2b are uniformly mixed into palm fibers 3b. It
After laminating thinly in a slim shape, as shown in FIG. 4, the sheet is compressed by heating it in the direction of the arrow by rollers 4, 4 to form an agricultural and horticultural sheet 1b.

The tree growing pot according to the present invention can control the rate of decomposition in soil by the thickness of the fiber material used as the material. In the tree-growing pot according to the present invention, the agricultural and horticultural sheet 1 may be pressed into a mold while being heated to form a pot mold.

[0021]

According to the manufacturing method of the first aspect, since the powder or granular biodegradable plastic is melted and soaked into the sheet fiber material and compressed, there are many gaps, and the air permeability, water permeability, and water retention property are large. A good agricultural and horticultural sheet can be obtained. Further, since the powdery or granular biodegradable plastic is supplied to the upper surface of the sheet fiber material, the biodegradable plastic can be melted only by providing a heating means only on the upper roller, so that the equipment is economical. .

Further, according to the manufacturing method of claim 2, since the fiber material is uniformly mixed with an appropriate amount of powder or granular biodegradable plastic, the fiber material is heated while changing the amount thereof. By simply compressing, it is possible to obtain an agricultural and horticultural sheet having a desired thickness in which the biodegradable plastic is evenly soaked.

Further, since the tree growing pot of claim 3 is formed from the agricultural and horticultural sheet obtained by the method of claim 1 or 2, it has good air permeability, water permeability and water retention.
It does not cause root rot, and the roots easily grow through the gaps between fibers and do not hinder the growth of seedlings. In addition, since it is completely decomposed in the soil, transplantation can be filled with the tree-growing pot, and there is no risk of roots being cut and dead during transplanting work. Furthermore, since the agricultural and horticultural sheets are formed by die-cutting and assembling, tree-growing pots of any size and shape can be molded as needed, and there is an advantage that they do not require many storage places until assembling. .

[Brief description of drawings]

FIG. 1 is a perspective view of an agricultural and horticultural sheet obtained by the method for manufacturing an agricultural and horticultural sheet according to claim 1.

FIG. 2 is a partially enlarged sectional view of the agricultural and horticultural sheet of FIG.

FIG. 3 is an explanatory diagram of a method for manufacturing the agricultural and horticultural sheet of FIG. 1;

FIG. 4 is an explanatory view of a method for producing an agricultural and horticultural sheet according to another embodiment of the present invention.

FIG. 5 is a perspective view of a tree-growing pot according to claim 3.

FIG. 6 is a development view of a tree growing pot.

[Explanation of symbols]

1, 1b agricultural and horticultural sheet 2, 2b biodegradable plastic particles (powder or granular biodegradable plastic) 2a biodegradable plastic 3 fiber material (sheet fiber material) 3a, 3b palm fiber (fiber material) 4, 4a roller 5 tree-growing pot 6 fan-shaped development view 7 cut 8 staple

Claims (3)

[Claims] 1. A method in which a powdery or granular biodegradable plastic is supplied to a sheet fibrous material in which a fibrous material is thinly laminated in a mussilo shape so as to be uniformly dispersed, and is formed by heating and compressing in a thickness direction. A method for producing an agricultural and horticultural sheet. 2. A powdery or granular biodegradable plastic is evenly mixed into a fiber material and thinly laminated in a muscillo shape,
A method for producing an agricultural and horticultural sheet, which comprises forming the sheet by heating and compressing in the thickness direction. 3. A tree-growing pot, characterized in that the agricultural and horticultural sheet obtained by the manufacturing method according to claim 1 or 2 is die-cut, shaped, and assembled into a pot shape.