JPH03216117A - Nursery vessel - Google Patents

Abstract

PURPOSE:To obtain a high-density nursery vessel having low air permeability, enhancing water retention of culture medium, preventing protrusion of root out of vessel and without damaging root by forming a nonwoven fabric containing a nep at a specific ratio in a thermally compressing mold. CONSTITUTION:The aimed nursery vessel 4 obtained by adding 20-30/cm nep having >=1mm diameter and <=10wt.% thermally adhesive fiber to a fiber 2 made of a nonwoven fabric waste material having <=400g/m<2> weight and 12d denier and forming the mixed material using a thermal compression molding and having <=25cc/cm<2> air permeability.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to vegetables. petal. The present invention relates to a seedling container suitable for growing seedlings of plants such as ornamental plants.

[Conventional technology and its problems]

Conventionally, in addition to clay pots, plastic pots, and beet moss containers, containers for raising seedlings include, for example, Japanese Patent Laid-Open No. 57-9422
As seen in No. 5 and Utility Model Application Publication No. 49-95134,
Containers formed by thermoforming nonwoven sheets are also seen. However, these seedling-growing containers have too high aeration and the culture medium inside tends to dry out easily. In addition, although this drawback can be improved by increasing the fiber density of molding, the amount of fiber used increases, making it necessary to increase the pressure and temperature during molding, resulting in an expensive seedling growing container.

[Means to solve the problem]

The present invention has been made in view of the above-mentioned problems, and a container is constructed by thermo-pressure molding of a non-woven fabric layer formed using fibers made from recycled non-woven fabric cutting waste, and a diameter 20-30 neps with 1 or more strokes/cr
a or more, and has an air permeability of 2 5 cc/crA/
This problem has been solved by obtaining a seedling growing container that is less than sec.

That is, the present invention aims to eliminate waste generated from nonwoven fabric production activities,
For example, a nonwoven fabric with relatively weak bonding strength between fibers is selected from cut scraps or defective original fabric, and is curled using a garnet machine to form a fiber aggregate with uniformly dispersed lint. By forming the web again and bonding it with a resin binder, heat-adhesive fibers, and 21 dollar punching, we succeeded in obtaining a seedling-growing container with high yield and excellent water retention.

The nonwoven fabric waste used in the present invention is natural fiber or synthetic fiber,
Alternatively, it is a non-woven fabric composed of short fibers that are a mixture of both, the basis weight is 400 g/rl or less, and the fibers used are 1
2d or less is preferable. When the basis weight is 400 g/td or more and the fibers used are 12 d or more, it becomes difficult to curl with a garnet machine, and 90% or more of the fibers become extremely short fibers of 10 mm or less, making it difficult to form a web. If the nonwoven fabric waste is cut to a size of approximately loc+n angle before being applied to the garnet machine, it will not wrap around the opening roller, and the opening will be performed smoothly without putting any burden on the roller.

About 15% of the nonwoven fabric waste subjected to the garnet machine becomes ultrashort fibers of 10 nm or less in weight, but about 85% can be recovered as cotton-like fiber aggregates of 10 nm or more. However, about 50% of the fibers are not completely opened, and are uniformly dispersed as necks of fiber aggregates in which several to several dozen fibers are bonded together. The cotton fibers containing the nets are formed into a web using a card or a land web to obtain a web in which the nets are uniformly dispersed. At this time, a strong web can be obtained by adding 10% or more new short fibers by fiber weight. A nonwoven fabric with uniformly dispersed neps can be obtained by bonding the fibers of this web with an adhesive by dipping or spraying, or by bonding the fibers with each other by needle punching or thermal bonding. In addition, when a nonwoven fabric web is formed by adding thermobonding fibers in an amount of 10% or more by weight, sufficient shape retention is achieved when molded into a container for raising seedlings by heat compression molding using a mold. The seedling growing container thus molded becomes a seedling growing container made of fibers in which Nemp is uniformly dispersed.

Neg, which is a fiber aggregate obtained when non-woven fabric waste is applied to a gar-bonding machine, is a fiber assembly with a heat-bonded fiber several meters in diameter in the center, as shown in Figure 2, in the case of non-woven fabric waste that has been fiber-bonded by a thermal bonding method. There is a resin piece (1) that has been made into a film, and several fibers (2) are glued to it and gathered together in a tangled manner.

In addition, in the case of non-woven fabric waste fiber-bonded by dipping/spraying, several fibers (2) are bonded to a resin piece (3) several meters in diameter and become entangled, as shown in Figure 3. They are gathering like this. Most of the resin pieces possessed by these NEPs are thermoplastic, and the compression pressure and temperature during molding further transforms them into a film, resulting in the entire NEP becoming a high-density fiber aggregate. For this reason, seedling growing containers obtained by thermal compression molding of nonwoven fabric containing necks have low air permeability as the fiber gaps are filled with neps; If the temperature exceeds this level, the cultivation soil will dry out quickly and the number of irrigations will increase, which is not preferable.

In addition, for web nets using cotton-like fiber aggregates made from non-woven fabric waste, the number of nets per unit area and the size of the nets can be adjusted by appropriately selecting the type of non-woven fabric waste. can. For example, nonwoven fabric scraps obtained by the adhesive dipping method yield a web with many neps, while nonwoven fabric scraps produced by spray bonding or thermal bonding produce a web with relatively few neps. Moreover, a web with large neps can be obtained from nonwoven fabric waste with a large amount of adhesive resin, and a web with small neps can be obtained from a nonwoven fabric with a small amount of resin.

In addition, a nonwoven fabric produced by the needle punching method has a small amount of neps, and a web with small neps can be obtained. Therefore, for a seedling growing container made of a nonwoven fabric formed by needle punching a web with a large amount of neps per unit area, the larger the amount of neps, the less air permeable the seedling growing container will be obtained.

This is because the resin pieces near the center of the nep close the gaps between the fibers, compressing the nep and further increasing the fiber density.

An embodiment of the present invention will be described in detail below.

〔Example〕

As nonwoven fabric waste, nonwoven fabric for interlining with fibers bonded by thermal bonding (fiber composition: nylon 15dX38 nm+30
%〈Thermoadhesive fiber〉Polyester 2dX51mm 70%,
Fabric weight 2 2 g #) is cut into 10cm square pieces and curled with a garnet machine to make a cotton-like fiber aggregate A with netting.
form.

In addition, nonwoven fabric for interlining (fiber composition: nylon 1.5dX47lTIff180
%, rayon 1-3dX51mm 20%, binder: acrylic ester, solid content coverage 7.5 y/tl. A fabric with a fabric weight of 21 g/II1) was cut into approximately 10c+n squares and curled using a garnet machine to create a cotton-like fiber aggregate surface with stubs.

32.5% by weight of the above cotton fiber aggregate (A) and 032.
5% by weight and thermoadhesive fiber 15 d X 5' 1 m
A fiber mixed with 35% by weight of M (Meltei 4080 manufactured by Unitika) was passed through a carding machine to form a cloth wape with a basis weight of 450 g/i in which neps were uniformly dispersed.

The size of the nep included in the above web is 0.5-5 in diameter.
mm, weight is 0.05-0.5n6I/1 piece, approximately 80
~150 particles/cIIl are uniformly dispersed.

This cross web was further punched at 100 P/c+fl to a thickness of 10 nwn. A nonwoven fabric with a basis weight of 450 g/II+ was prepared and thermoformed using a concavo-convex mold at a mold temperature of 120° C., a compression pressure of 2.5 tons, and a compression time of 50 seconds.

The size of the obtained seedling growing container was 4, with a height of 100 m and an opening outer diameter of 120 mm. Bottom outer diameter 86m, wall thickness 0.8mm
, the weight is 25 g, the fiber density is 0.81 g/clI1, and as shown in Fig. 1, the compressed nonwoven fabric (5) is uniformly dispersed in the thermoformed nonwoven fabric constituting the container (4). A seedling growing container with a dense structure and low air permeability was obtained.

In order to compare the air permeability with the seedling growing container obtained in the above example, a comparative example was prepared as shown below.

[Comparative example]

Fiber composition: nylon 15dX38mm 9.75%, polyester 2dX51+n+n 22.75%, nylon l. 5dX47n++n26%, rayon 1.3d
x51mm6-5%, thermal adhesive fiber 1 5dx5Il+
Wl (Melty 4080) After forming a nep-free cross web with a basis weight of 450 g/tl using a carding machine using 35% mixed fiber, 100 P/c
A nonwoven fabric was made by applying rA needle punch processing.

A 10 cm square piece of this sample was compression molded under the same conditions as in the example to obtain a seedling growing container. The compression force was 0.65 tons, and the thickness after molding the nonwoven fabric was 0.8 mm.

The air permeability of the two samples of the above example and comparative example was measured by a densometer method. The number of samples used was 5 each.
The average value was 3.2 cc/c//see for the example and 5.2 cc/c//see for the comparative example. It was 1 cc/cm2/sec.

〔Effect of the invention〕

By having the above-described structure, the present invention makes it possible to effectively utilize non-woven fabric waste, which has conventionally been discarded or incinerated, and to help preserve the environment. By using a nonwoven fabric made of aggregated fibers, it is possible to mold the seedlings at a relatively low temperature and pressure, resulting in a seedling growing container with high density and low air permeability. Therefore, the water retention capacity of the culture medium is improved, and the roots of the plants to be grown are less likely to protrude outside the container, thereby preventing damage to the roots.

[Brief explanation of drawings]

FIG. 1 is a partially cutaway sectional view of a seedling raising container showing an embodiment of the present invention, and FIGS. 2 and 3 are plan views showing the form of nep contained in the recombed fiber aggregate used in the present invention, respectively. It is. (1)...7il l1 resin piece (2)
...Fiber (3) ...Resin piece
(4) Container (5) Container 1 Figure 5 Figure 2 Figure 3

Claims (1)

[Claims] A container is constructed by thermo-pressure molding of a non-woven fabric formed using fibers made from recycled non-woven fabric cuttings, and 20 to 30 neps with a diameter of 1 mm or more are formed in the non-woven fabric constituting the container.
Contains more than cm^2 and has breathability of 25cc/cm^2
/sec or less.