JP2500300B2 - Sheet for seeding and raising seedling and method for producing the same - Google Patents

Description

Detailed Description of the Invention

[0001]

FIELD OF THE INVENTION The present invention relates to seeding and raising sheets used for seeding vegetables, flowers and the like on fields and nursery beds, and particularly for raising seedlings, and in particular, seeds at any interval and number of grains, and
It can be fixed firmly so that it can be easily handled without fear of falling off, it can respond flexibly without damaging germination for sowing and seedling of various vegetables and flowers, sowing that can contribute to labor saving of sowing A sheet for raising seedlings and a method for producing the same.

[0002]

2. Description of the Related Art Up to now, sowing work has generally been carried out by hand, and in some cases, sowing by machines is also carried out. There is also a seed tape in which seeds are enclosed in a water-soluble tape, seed paper in which seeds are fixed on a water-soluble nonwoven fabric with an adhesive, and the like are placed on a nursery bed to germinate and raise seedlings. Among them, the seed tape is one in which seeds are physically contained in a tape made of a water-soluble film so as not to fall off, but it is difficult to keep the seeds at an appropriate distance, and seedlings It may hurt you. Further, the seed paper is excellent in fixing the seed and setting the position, but since the position where the adhesive and the seed are dropped is mechanically determined, it is difficult to produce a pattern in which the seed interval is close, It was difficult to apply to very small seeds.

[0003] Further, a sheet for seeding and raising seedlings has been developed which allows easy mounting of a predetermined number of seeds at predetermined intervals, but since this sheet is not intended to firmly fix the seeds, It is not suitable for work such as transporting sheets with seeds loaded. In recent years, a sheet for seeding and raising seeds has been developed in which seeds are fixed on the sheet by mounting seeds on the sheet and then coating the layer with a water-soluble polymer.
However, in this case, since it is coated with a non-adhesive water-soluble polymer, at the time of production, pressure bonding and bonding,
Alternatively, it is necessary to coat the seed-mounting sheet with a water-soluble polymer in a solution state, so that the seed is heated, or the seed absorbs moisture, which adversely affects germination in some items. There are cases.

[0004]

As described above, when the conventional seed mounting sheet is used, labor saving such as sowing and raising seedlings has been achieved depending on the purpose of use. It was extremely difficult to sow a predetermined number of seeds at a predetermined position without dropping the seeds.

The object of the present invention is to solve the problems of the prior art described above, and to fix seeds at an arbitrary interval and number of grains and firmly so that they can be easily handled without fear of falling off. It is possible to provide a sheet for seeding and raising seedlings capable of flexibly responding to seeding and raising seedlings of various vegetables and flowers without spoiling germination and contributing to labor saving of seeding, and a method for producing the same.

[0006]

[Means for Solving the Problems] The above-mentioned object is a sheet for sowing and raising seeds, comprising seeds fixed to a water-soluble or water-dispersible base material, which comprises a first water-soluble or water-dispersible layer and dot-like adhesive. Has a laminated structure in which an agent layer, a seed layer, a water-soluble pressure-sensitive adhesive layer, and a second water-soluble or water-dispersible layer are sequentially laminated, and
The water-soluble pressure-sensitive adhesive layer has the first portion in the seed-absent portion.
Seed migration, by adhering to the water-soluble or water-dispersible layer of
The present invention can be achieved by using a sheet for seeding and raising seedlings, which is characterized in that the sheet has a structure for preventing falling off.

[0007]

[Function] As the water-soluble or water-dispersible substrate,
Water-soluble paper (Dissolvo manufactured by Mishima Paper Co., Ltd.), water-soluble nonwoven fabric
(Honshu Paper Co., Ltd. quinoclos etc.), or polyvinyl alcohol, carboxymethyl cellulose sodium salt,
Examples include water-soluble polymers such as hydroxyethyl cellulose, starch, dextrin, sodium acrylate and the like. Among the water-soluble polymers, partially saponified polyvinyl alcohol having a saponification degree of 70 to 90% is particularly effective in view of economy, solubility in water, strength and the like. Also,
Among the above first and second two layers, one side is preferably a transparent water-soluble polymer so that the fixation state of the seed can be visually observed at a glance when the laminated structure is adopted. Considering curl and ease of handling,
One side is preferably water-soluble paper or water-soluble nonwoven fabric having a certain strength.

If an adhesive having an adhesiveness sufficient to capture the seeds to be sown is accurately applied at a predetermined position on the first water-soluble or water-dispersible substrate, the seeds will be applied to this. By sprinkling with, seeds can be mounted at predetermined positions on the base material at predetermined intervals. The pressure-sensitive adhesive can be applied in any form such as a linear shape or a dot shape, but the dot-shaped application is superior for controlling the number of seeds mounted.
In order to mount one seed at one location, the coated area of the pressure-sensitive adhesive must be made sufficiently smaller than the size of the target seed. Screen printing is suitable as a method for applying a dot-shaped adhesive having a small area and arbitrary shapes and intervals. As the type of the adhesive, a commercially available adhesive can be appropriately selected and used as long as it has no inhibitory effect on germination of seeds, growth of seedlings and the like. When applying the screen printing method, it is needless to say that the printability is excellent.

As for the water-soluble pressure-sensitive adhesive, it has excellent water-solubility,
If there is no inhibitory effect on the germination of seeds, the growth of seedlings, etc., a commercially available adhesive can be appropriately selected and used.
When using water-soluble paper or water-soluble non-woven fabric as a water-soluble or water-dispersible substrate, since a water-soluble binder exhibiting alkalinity is often used for molding them, the water-soluble pressure-sensitive adhesive is acidic. It is preferable to use a material that exhibits Regarding the thickness of the water-soluble pressure-sensitive adhesive layer, the adhesive strength to the water-soluble or water-dispersible substrate is sufficient, and the thickness is such that seeds do not move or fall off, and the water solubility is not extremely disturbed. The thickness is not required to be strictly defined.

Further, the above laminated structure can be efficiently manufactured by the following procedure. That is, first, a first water-soluble or water-dispersible substrate is coated with an adhesive in a dot shape at regular intervals, and seeds are sprinkled on the adhesive.
It is equipped with a fixed number of seeds. On the other hand, a water-soluble pressure-sensitive adhesive is applied on the second water-soluble or water-dispersible substrate and dried. Then, both of the above, so that the seed and the water-soluble pressure-sensitive adhesive face each other, by using a roll having flexibility, by pressure-bonding to an extent that unnecessary pressure is not applied to the seed, and by laminating, A sheet for seeding and raising seedlings can be obtained. It is possible to more efficiently manufacture by using a continuous manufacturing process in which a base material rolled up in a roll shape is used and, after bonding, cutting into a constant size.

When a water-soluble polymer is used as the second water-soluble or water-dispersible substrate, the water-soluble adhesive may be directly applied to the water-soluble polymer, but the strength of the method is not limited. When it is difficult to apply, a base material such as a polyester film having a smooth surface and strength and a water-soluble polymer solution that does not permeate is used as an auxiliary material, and the water-soluble polymer solution is applied thereon, followed by drying, On top of this, further apply a water-soluble adhesive, dry it, and attach the seeds to a water-soluble or water-dispersible substrate loaded with a dot-like adhesive, and then use only the substrate used as an auxiliary material. By peeling off, the intended seedling-growing sheet can be obtained.

The seeded seedling-growing sheet of the present invention having the above-mentioned structure can fix any seeds to the base material at a predetermined interval and pattern without dropping, regardless of the size of the seeds. When placed on the floor, seeds can be rapidly sown at a predetermined position by a predetermined number of grains, and the constituent materials dissolve in water, so that germination of seeds and growth of seedlings are not hindered.

[0013]

EXAMPLES The structure of the present invention will be described in detail below with reference to examples.

[0014]

Example 1 First, on a commercially available 300 mm × 600 mm water-soluble paper,
By screen printing, 1100 acrylic adhesives having a diameter of 0.3 mm were printed in a dot shape, and leek seeds were sprinkled on the acrylic adhesives, and one dot was mounted on each dot of the adhesive. On the other hand, a commercially available polyvinyl alcohol film was coated with a water-soluble pressure sensitive adhesive using a comma coater, dried, and then bonded to the above-mentioned leek seed mounting sheet using a pressure bonding roll consisting of a urethane rubber roll and a metal roll.

FIG. 1 is a conceptual view showing a cross section obtained by cutting the seeding and seedling-raising sheet prepared as described above at a seed mounting portion, where 1 is a water-soluble paper and 2 is a dot-like coating on the water-soluble paper 1. The pressure-sensitive adhesive, 3 is a leek seed, 4 is a water-soluble pressure-sensitive adhesive, and 5 is a polyvinyl alcohol film. In this case, the leek seeds 3 were firmly fixed by the water-soluble pressure-sensitive adhesive 4, and there was no problem of migration or dropping.

[0016] Here, in order to manually sow the leek seeds under the same conditions as the above-mentioned sheet, it is necessary to coat the seeds and use a sowing jig together, and the time required for sowing work is about 1 minute. Is. On the other hand, when the above-mentioned sheet of the present invention was used, it took only 10 seconds since the seed-loaded sheet was placed on the nursery bed.

Further, in the case of manual sowing, the seeding position sometimes changed due to rolling of seeds, etc., but in the case of the sheet of the present invention, a regular seed arrangement in the initial state was obtained.

A comparative test of germination and growth was carried out by supplying water between the case where the above seeding and raising seedling sheet was placed on a seedling raising bed made of peat moss and the case where the seed was manually sowed. As a result, the germination rate using the sheet of the present invention is
95%, germination rate of 93% when manually sown on nursery beds
The results were almost the same, and the growth was also good.

[0019]

[Example 2] In the same manner as in Example 1, a commercially available 300 m
Screen printing on m × 600mm water-soluble paper
Print 1100 dots of 0.3 mm acrylic adhesive,
Onion seeds were sprinkled on it, and one seed was mounted on one dot of the adhesive. On the other hand, on the polyester film,
Using a comma coater, a polyvinyl alcohol aqueous solution with a saponification degree of 88% (concentration: about 15%) was applied and dried, and a water-soluble adhesive was applied using a comma coater and dried. This was bonded to the above-mentioned seed-carrying sheet using the same pressure bonding roll as in the case of Example 1 to obtain a seedling-growing sheet on which leeks seeds were fixed.

FIG. 2 is a conceptual diagram showing a cross section of the seedling-growing sheet of this embodiment cut at the seed mounting portion. The reference numerals in the drawing are the same as those in Embodiment 1, and the hatched portion 6 is shown. Indicates a polyester film used as an auxiliary material. When the polyester film was peeled off, it could be easily peeled off from the polyvinyl alcohol layer, and the fixed state of the leek seeds was not impaired.

The sheet for seeding and raising seedlings of this Example is also
In the same manner as in Example 1, the germination and growth were compared with the case where the seedling was placed on a nursery bed made of peat moss and seeded by hand. As a result, the germination rate using this Example sheet was 94%, and the germination rate when manually seeded on the nursery bed was 95%, showing no significant difference between the two, and the growth was also favorable. It was

[0022]

As described above, by using the sheet for seeding and raising seedlings and the method for producing the same as the sheet and the method for producing the seedling according to the present invention, the problems possessed by the prior art can be solved, and seeds can be arbitrarily produced. It can be firmly fixed at the intervals and the number of grains, and it can be firmly fixed so that it can be easily handled without fear of falling off, and it can flexibly respond to seeding of various vegetables, flowers, etc., without spoiling germination and raising seedlings. It was possible to provide a seedling-raising and raising sheet and a method for producing the same, which can contribute to labor saving.

[Brief description of drawings]

FIG. 1 is a conceptual diagram showing a cross section of a seed mounting portion of the seedling raising seedling sheet of Example 1.

FIG. 2 is a conceptual diagram showing a cross section of a seed mounting portion of the seedling raising seedling sheet of Example 2.

[Explanation of symbols]

1 ... Water-soluble paper, 2 ... Adhesive coated in dots, 3 ... Leek seeds, 4 ... Water-soluble adhesive, 5 ... Polyvinyl alcohol,
6 ... Polyester film.

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Mikiko Nanai 3819 Noborito, Tama-ku, Kawasaki City, Kanagawa Prefecture Sliontech Co., Ltd. (56) References JP-A-5-292805 (JP, A)

Claims (6)

(57) [Claims] 1. A sheet for sowing and raising seeds, comprising seeds fixed to a water-soluble or water-dispersible base material, which comprises a first water-soluble or water-dispersible layer, a dot adhesive layer, a seed layer, and a water-soluble layer. It has a laminated structure in which an adhesive layer and a second water-soluble or water-dispersible layer are sequentially laminated, and the water-soluble adhesive layer has the first water-soluble or water-dispersible layer in the seed absent portion. A seeding and nursery sheet, characterized in that it is adhered to a sexual layer to prevent movement and drop of seeds. 2. A sheet for sowing and raising seeds, comprising seeds fixed to a water-soluble or water-dispersible substrate, which comprises a first water-soluble or water-dispersible layer, a dot-shaped adhesive layer, a seed layer, and a water-soluble material. It has a multilayer structure in which an adhesive layer and a second water-soluble or water-dispersible layer are sequentially laminated, and the water-soluble adhesive layer has the first water-soluble or water-dispersible layer in a seed-absent portion. Seedling seedlings characterized by comprising a protective layer formed of a polymer film on one surface or both surfaces of the laminated structure, the composition comprising a structure for preventing the seeds from moving and falling off by adhering to a hydrophilic layer. Sheet. 3. The seeding and nursery sheet according to claim 1, wherein the water-soluble or water-dispersible layer is a layer made of a water-soluble polymer film or water-soluble or water-dispersible paper. 4. The water-soluble polymer film has a saponification degree of 70.
A sheet for seeding and raising seedlings according to claim 3, wherein the sheet comprises ˜90% polyvinyl alcohol. 5. The seedling raising seedling sheet according to claim 1, wherein the water-soluble adhesive layer is an acidic adhesive layer. 6. A method for producing a sheet for seeding and raising seedlings, which comprises the following steps. (1) A step of applying a pressure-sensitive adhesive in a dot shape on one surface of the first water-soluble or water-dispersible polymer film or paper, (2) a step of attaching seeds onto the pressure-sensitive adhesive, (3) Second step of applying a water-soluble adhesive to one surface of the water-soluble or water-dispersible polymer film or paper, (4) the material obtained in (2) above and the material obtained in (3) To
A step of attaching the seed and the water-soluble adhesive so that they are in contact with each other.