JPH05137467A - Nursery container - Google Patents

Abstract

PURPOSE:To obtain a nursery container, composed of a specific nonwoven fabric so that biodegradable fiber may degrade to disappear and form a porous reticulate shape in soil, capable of being directly transplanted without disturbing the elongation of roots, excellent in operating efficiency and useful as greening trees, ornamental foliage plants, etc. CONSTITUTION:The objective nursery container 1 is a molded nursery container 1 composed of a nonwoven fabric, constructed of 10-90% biodegradable fiber 2 such as rayon that is biodegradable with microorganisms in soil and 90-10% undegradable fiber 3 which is not biodegradable and has 30-500g/m<2>, preferably 50-400g/m<2> basis weight. The nursery container is formed so that the biodegradable fiber 2 may be degraded to disappear and form a porous reticulate shape.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a seedling raising container suitable for raising seedlings of plants such as green trees and ornamental plants.

[0002]

2. Description of the Related Art Conventionally, a seedling raising container has been disclosed in Japanese Patent Laid-Open No. 3-21.
As disclosed in Japanese Patent No. 6117, a container formed by thermoforming a non-woven sheet made of synthetic fiber or Japanese Patent Application No. 2-36997.
As can be seen in the publication, there is proposed a seedling raising container in which chitosan containing fine cellulose is adhered and molded on a cellulosic fiber mat, and all of which decomposes and disappears by biodegradation.

[0003]

The former container for raising seedlings made of a synthetic fiber non-woven fabric is not biodegradable in soil, so its shape is maintained semipermanently, and roots are tightly packed in the container as the plant grows. If this happens, the growth will stop, and it will be necessary to replant the container into a larger one, which is a troublesome task.

Further, the latter seedling raising container is completely decomposed in a state where the plant is planted in 6 months to 1 year on the ground and 1 to 3 months in the soil, and the period required for its growth is decomposed depending on the kind of the plant. There is a problem that it is difficult to control without doing so.

Therefore, when cultivating a plant, for example, a greening tree, in the open field, the former seedling is planted in a nonwoven fabric seedling container, the container is embedded in the soil for use, and shipped when the greening tree grows to a certain size. There is a demand for a seedling raising container that can be transplanted together with a tree without removing the seedling raising container that presses the root growth of the tree at the construction site and does not press the root growth.

[0006]

The present invention has been made in view of the above problems, and 10 to 90%, preferably 20 to 80%, of the fibers constituting a seedling raising container are decomposed in soil in a few months. It is made of biodegradable fiber that disappears and decomposed in the soil to form a multi-voided container, and the roots and soil can be firmly fixed without the need for container replacement or removal even during long-term cultivation. It can be transplanted while hugging,
The problem is solved by obtaining a seedling raising container that does not interfere with the growth and growth of plant roots from the voids.

That is, the biodegradable fibers and non-biodegradable fibers constituting the seedling raising container of the present invention include regenerated fibers such as rayon and acetate, semi-synthetic fibers and natural fibers such as wool, silk, cotton and hemp, and polyester, Non-woven fabrics made from synthetic fibers such as nylon, acrylic, polypropylene, polyethylene, vinyl chloride, etc. and thermo-adhesive synthetic fibers, using selected mixed fibers, are heat-compressed, sewn, bonded and assembled to form seedling containers. Mold into shape.

The types of non-woven fabrics mentioned above include dry non-woven fabrics, wet non-woven fabrics, spun-bonded non-woven fabrics, spun lace non-woven fabrics, and the interfiber binder in the dry non-woven fabric is biodegradable binder or non-biodegradable. A sexual binder may also be used.

Furthermore, the basis weight of the non-woven fabric is 30 to 500 g /
m ² , preferably 50 to 400 g / m ² , and the ratio of the biodegradable fiber to the non-degradable fiber mixed in the nonwoven fabric is 10
90%, preferably 20-80%, and less than 10%, when the container is embedded in the soil to grow the plant, the mesh-like pore size formed is small even if the biodegradable fiber decomposes and disappears. The root of the root does not expand sufficiently, and if it is 90% or more, the shape of the container after biodegradation cannot be maintained, and the soil around the root falls to damage the root.

[0010]

According to the seedling-growing container of the present invention, when a plant is planted and grown, it can be transplanted as it is without any need for container replacement at the time of transplantation after the period required for the plant to grow, and biodegradable fiber. The mesh-like voids formed in the container due to decomposition and disappearance of the plant sufficiently extend the roots of the plant and do not hinder the growth, and the number of steps such as root winding required for transplantation can be omitted.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings.

Rayon 15d × 38mm 50% (weight),
Heat-bondable fiber 15d x 51mm (Melty 4080 Unitika Ltd.) 30% (weight) and polyester 10d x 38mm
A fiber mixed with 20% (weight) is used to form a cross web having a basis weight of 200 g / m ² with a card machine and a cross layer device.

The cloth web is then needle punched at 100 P / cm ² to entangle the fibers with each other and have a thickness of 3 m.
A non-woven fabric having a m and a basis weight of 200 g / m ² was prepared and thermoformed by using a concavo-convex mold at a mold temperature of 120 ° C., a compression pressure of 5 tons, and a compression time of 10 seconds.

As shown in FIG. 1, the obtained seedling-growing container 1 has a size of No. 4, a height of 100 mm, an opening outer diameter of 120 mm, a bottom outer diameter of 86 mm, a wall thickness of 0.8 mm and a weight of 25 g. A container having good air permeability was obtained, which was composed of a mixed fiber with the non-biodegradable fiber (thermoadhesive fiber, polyester fiber) 3 in which the degradable rayon fiber 2 was uniformly dispersed.

Using the seedling raising container obtained in the above-mentioned example, as shown in FIG.
As a result, gold crest was planted and the container was buried in the soil 5 in the open field for cultivation.

The biodegradable rayon fiber was completely decomposed in about 4 months, and a mesh-like void having a size of 50 μm to 3 mm was uniformly formed in the seedling-growing container, and one year later, the root extended from the mesh void. The hole was expanded. By changing the type of biodegradable fiber used, the fiber diameter, and the basis weight of the nonwoven fabric, the time when voids are formed in the seedling raising container can be changed.

[0017]

EFFECTS OF THE INVENTION With the constitution of the present invention, when a green tree is cultivated in an open field in a container for raising seedlings and a tree that has grown to a certain size is transplanted to a target place, it is formed into a container by biodegradation. The mesh-like voids do not hinder the extension of roots, the number of procedures for container replacement can be omitted, and transplantation can be performed with the container attached. Moreover, the soil around the root does not fall off during transplantation, and the trees are not damaged, there is no need for root wrapping, and work efficiency is improved.

[Brief description of drawings]

FIG. 1 is a partially cutaway front view of a seedling-growing container showing an embodiment of the present invention.

FIG. 2 is a schematic view showing a usage state of the seedling raising container of the present invention.

[Explanation of symbols]

 1 Seedling container 2 Biodegradable rayon fiber 3 Non-biodegradable fiber 4 Greenery tree 5 Soil

Claims (1)

[Claims] 1. A non-woven fabric having a basis weight of 30 to 500 g / m ² composed of 10% to 90% of biodegradable fibers biodegradable by microorganisms in soil and 90% to 10% of nondegradable fibers not biodegradable. A molded nursery container according to claim 1, wherein the biodegradable fiber is decomposed and eliminated in soil to form a multi-pore network.