JPH0484809A - Sowing sheet - Google Patents

Abstract

PURPOSE:To form a sowing sheet in which an adhesive does not affect seeds, by partially bonding two base sheets to each other with the adhesive in a specific pattern and fixing the seeds in spaces free from the adhesive. CONSTITUTION:Two base sheets 1, 1 are partially bonded to each other with an adhesive 3 in a continuous or discontinuous pattern and plant seeds 2... are arranged in adhesive-free spaces between the base sheets 1, 1 to provide a sowing sheet.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to seeding sheets, and more particularly to seeding sheets placed between two substrate sheets without contacting the plant seeds with an adhesive.

Conventional techniques It is known that plants have inter-individual spacing suitable for growth depending on the type, and there are densely planted types, sparsely planted types, etc. Therefore, when sowing in orchid, clustering occurs in the growth rate of seedlings due to the sparse distribution of seeds, which in turn leads to a reduction in the total yield.

Therefore, in the field of agriculture, methods such as thinning, shifting, etc., or sowing at regular intervals from the beginning are being practiced.

However, it is a laborious task to carry out these tasks manually, especially when sowing seeds. Even if the seeds are planted successfully, natural phenomena such as wind and rain can shift the position of the seeds, causing them to fall into the wrong position. The spacing may collapse. On the other hand, it may be possible to do this mechanically, but it cannot be said to be appropriate in view of simplicity and the arable land situation in our country.

Invention or Problem to be Solved Against the above background, seeding tapes and seeding tools have been developed in recent years.
Some are already commercially available. These are made by holding seeds at regular intervals on a base material, and the base material is mainly water-soluble, so that it does not dissolve with water or rainfall and inhibit the growth of plants. It is designed to be washed away by an appropriate time.

The seeding tape is a type of tape in which seeds are held at regular intervals in a twisted piece of water-soluble paper, film, non-woven fabric, etc.

There are two types of seeding sheets: one sheet and two sheet sheets. A one-sheet product is one in which seeds are attached to one base sheet of the above-mentioned material by an appropriate means. With this one-piece product, the seeds tend to fall off, and the seeds or bullets fly during germination, which can change the position of the seeds, and furthermore, they can be washed away by rainwater. Therefore, a two-sheet product in which seeds are held between two sheets is better from the viewpoint of maintaining the spacing between the seeds.

However, there are some problems with conventional seeding/planting, whether it is one or two sheets. That is, in conventional seeding sheets, seeds are often fixed to the sheet using an adhesive, but the adhesive may have an adverse effect on germination by coming into contact with the seeds.

Therefore, it is desirable to avoid contact with seeds, and it has been desired to develop a seeding sheet that solves these problems.

Means for Solving the Problems In view of the above circumstances, the inventors of the present invention have conducted intensive research and have focused on using adhesive only for bonding two sheets together, and developed an adhesive application pattern. It was unexpectedly discovered that seeds can be fixed in a space where no adhesive exists by using a specific adhesive, and the present invention has been completed.

That is, the present invention provides a method in which two base sheets are pasted together in a continuous or discontinuous pattern with an adhesive partially present, and plant seeds are placed in the spaces between the sheets where the adhesive is not present. The present invention provides a seeding tray characterized in that:

The present invention will be described below with reference to the drawings.

FIG. 1 is a cross-sectional view schematically showing the seeding sheet of the present invention. Figures 2a-c are plan views showing a preferred pattern of adhesive presence, ie, a discontinuous pattern. FIG. 3 is a plan view showing a putter 7 in which adhesive is continuously present.

First, referring to FIG. 1, the sowing/-t of the present invention consists of two base material sheets (+) and plant seeds (2) arranged at the gates thereof.
Yosunaru. The two sheets are then partially pasted together by tHfMl (3), resulting in the formation of individual spaces suitable for fixing the seeds in a fixed location.
The structure is such that plant seeds are placed in that space.

The two sheets are for arranging and fixing the seeds in a certain place, and it is desirable that the sheet material be one that will collapse or melt when wet with water or rain. Examples include ice-breaking paper, adhesive-free cellulose nonwoven fabric, polyvinyl alcohol film, and starch-based thin films such as wafers. These materials are washed away before they can adversely affect seed germination and subsequent growth.
Since it is ultimately decomposed by microorganisms, it is preferable from the viewpoint of environmental pollution control.

Two pieces of these materials are bonded together continuously or discontinuously and partially with an adhesive.

Here, the term "partially" as used herein means that the adhesive is not present on the entire surface of the sheet, but literally exists partially. Preferably, the adhesive is present in 3 to 60% of the total area of the plate. Less than 3% is 2
The adhesive strength between the sheets 7-1 is not sufficient to place and fix the seeds. On the other hand, if it exceeds 60%, there will be less space for seeds to exist, and as a result, there is a risk that the seeds may come into contact with the adhesive, which may further adversely affect germination.

Furthermore, the term "continuous" as used herein refers to a state in which the adhesive is continuous without interruption. In the present invention, it is also necessary to partially satisfy f at the same time, so "continuously and partially" means, for example, the third
A pattern similar to the one shown above applies. In this embodiment, the seeds are placed in a closed space, so it will be called an encapsulated type. On the other hand, the term "discontinuous" as used herein refers to a state in which the adhesives present are separated from each other. In the present invention, since it is necessary to tAFl "partially at the same time,""discontinuously and partially" corresponds to, for example, patterns such as those shown in FIGS. 2a to 2c. In this case, the seeds are placed in an open space.If the adhesive is present in a continuous form, there is a risk that the sheet may curl, or if it is present in a discontinuous form, it may cause curling. Since the force due to dimensional changes, etc. is dispersed at discontinuous points and does not work effectively, curling occurs.However, it is convenient to handle, and from this point of view, discontinuous patterns are preferable.

It should be noted that the pattern may be a regular pattern of repeating unit patterns or a lanotum pattern without such regularity.From the viewpoint of ease of manufacture, etc., a regular pattern is preferable. The patterns shown in FIGS. 2 and 3 are examples of repeating patterns.

Next, as for the type of adhesive, it is preferable to use one that dissolves when wet with water or rain, such as starch-based adhesives, alkinoic acid sorter, glue, casein, calhoquin methyl cellulose, ethyl cellulose, methyl cellulose, polyvinylpyrrolidone, polyvinyl methyl ether. , vinyl acetate-maleic anhydride copolymer, and water-soluble synthetic polymer compounds such as polyethylene glycol.

In the present invention, an adhesive may be used instead of an adhesive. Therefore, when the term "adhesive" is used in the present invention, the term adhesive also means an adhesive, unless it is explicitly used to distinguish it from an adhesive.

Examples of adhesives that can be used include natural combs, acrylic acid polyester combs, and the like.

By disposing the adhesive as described above in the pattern as described above, the two pieces of /-t are bonded to each other only at the patterned portions, and as a result, a space where no adhesive exists is formed. In the present invention, seeds are arranged in such a space at regular intervals. The placed seeds are fixed in position against sorting due to the frictional resistance between the two sheets, and the seeds will not move unless a slightly excessive physical force is applied. Therefore, even when actually used in fields, seeds can be held at regular intervals despite natural phenomena such as wind and rainfall. Regarding the contact between the seeds and the adhesive, contact is not absolute, but there may be slight contact, and such seeding sheets are also within the scope of the present invention.

The seeding tray of the present invention may have the above-described structure, or if desired, ingredients effective for plant growth such as fertilizers, pesticides, and plant hormones may be added to the adhesive and held in the seeding tray. You can also leave it alone.

The seeded sort of the present invention can be manufactured as follows.

First, adhesive is applied to one sheet in the pattern described above. Coating can be performed using, for example, a paper pattern method, a screen printing method, a rotary screen method, a gravure roll method, a roller printing method, or the like. As mentioned above, the adhesive used is a solvent type, and after being applied, the adhesive is dried and the solvent is removed before proceeding to the next step.

Seeds are then scattered at regular intervals on areas where no adhesive is present. Spreading can be carried out using, for example, a device that uses the tip of a nozzle to pick up the seeds and drop them onto a fixed position on a tray, or a device that attracts the seeds to the surface of a perforated hoard or drum and transfers them onto a sheet. I can do it.

Next, the other 7-t is prepared, and the 7-t and the sort are pasted together using the applied adhesive portion to obtain the sowing/t of the present invention.

In addition, when using adhesive, apply the adhesive, dry,
Use for seed dispersal after solidification. This is to avoid as much as possible the process of applying heat to the seeds.

Thus, the obtained seeds of the present invention can be in the form of long pieces or sorted pieces, and can be used for florists, such as salvia, petunia, banun, etc., vegetables, such as lettuce, cabbage, cabbage, etc., medicinal herbs, e.g. It can be used by fixing the seeds of plants such as Mishimasaiko, Angelica, etc., such as Penji Royal, Thyme, Chervil, etc. at regular intervals and spreading them out in the fields by hand or by machine.

In particular, it is very labor intensive to manually sow small seeds, such as those often found in medicinal herb seeds, at regular intervals, so the sowing method of the present invention is effective.

cold case The present invention will be explained in more detail with reference to Examples below.

Example 1 As a base sheet, 100% valve ice-melting paper (20g/
Adhesive starch (solid content 20%) was coated on one of the sheets in the pattern shown in FIG. 2a using a screen printing method.

Next, lettuce seeds are spread in the space using a precision vacuum spreading auto, and then pasted with the other sheet.
After drying, the seeds of the present invention were obtained.

The obtained sheet could be easily spread on the field without curling.

Example 2 100% rayon nonwoven fabric (20 g/m
Adhesive starch (solid content 20%) was applied onto one sheet using a gravure type coater in the pattern shown in Figure 2.

Then, using a tri-type precision vacuum spreader, the mutual spacing of 10
Seeds of Mi/Masho Iko were scattered on the sheet, followed by lamination with another sheet, and after drying, a seeded sheet of the present invention was obtained.

The obtained sheet could be easily spread on the field without curling.

Example 3 A PVA film (45 g/m') was used as the base sheet, and adhesive P was applied onto one of the sheets by screen printing.
VA (20% solids) was applied in the pattern shown in Figure 2C.

Next, a precision vacuum spraying hoard is used to spread the powder at a distance of 7c from each other.
Thyme seeds were scattered at m, followed by pasting with the other sheet of 100% bulb water-disintegratable paper (]] g/m'), and after drying, the sowing sort of the present invention was obtained.

The obtained sheet could be spread on a plug tray without curling.

Example 4 Bulb 100% water-disintegrable paper was used as a base sheet, and an adhesive polyacrylic ester (solid content 25%) was applied onto one sheet in the pattern shown in FIG. 2a by a gravure printing method.

After drying, Bann seeds were then spread with a precision vacuum spreading hoard at a mutual spacing of 2.5 cm, followed by
This sheet was laminated with the other sheet to obtain a seeding sheet of the present invention.

The obtained sheet did not curl (and could be easily spread on the field).

Effects of the Invention The present invention provides an excellent seeding sheet in which the seeds and adhesive do not come into contact with each other and the adhesive does not adversely affect the germination of the seeds.

In particular, the seeding sheet of the present invention in which the adhesive is disposed in a discontinuous manner does not curl, is flexible, and is convenient to handle.

[Brief explanation of drawings]

Fig. 1 is a cross-sectional view schematically showing the seeding sheet of the present invention, Fig. 2 a''-C is a plan view showing a pattern in which adhesive is present in a discontinuous manner, and Fig. It is a plan view showing a pattern in which the agent is present in a continuous form. The symbols in the drawing have the following meanings: 1. Base material), 2. Plant seeds, 3. Adhesive patent applicant Tinic Co., Ltd. Figure 2, Figure 3

Claims (1)

[Claims] (1) Two base sheets are pasted together in a continuous or discontinuous pattern with an adhesive partially present, and plant seeds are placed in the space between the sheets where the adhesive is not present. A seeding sheet featuring: