JPH07106084B2 - Manufacturing method of sowing paper - Google Patents

Description

TECHNICAL FIELD The present invention relates to a seeding paper used for seeding. In particular, the present invention relates to a method for producing seeding paper, which does not require protective paper, in the seeding paper having an adhesive for fixing seeds attached thereto.

<Conventional technology> Conventionally, for vegetables, flowers, and cereals that are transplanted and cultivated after the seedlings have been grown in a nursery box, seeds are sown on the floor soil of the box and then covered with soil to raise the seedlings. It was However, if seeds are sown in bulk and raised, it is necessary to thin out the seedlings during growth, and since the thinned seedlings are discarded, not only the seeds are used wastefully, but also the burden of thinning work is large. It was a thing. For this reason, row seeding and spot seeding, in which seed grains are sown accurately, are being used. Furthermore, recently, an adhesive is applied to the upper surface of water-soluble or water-dispersible thin paper at regular intervals in a dot shape with a diameter of several millimeters, and vegetables, vegetables, and cereals are placed on the paper with the adhesive. A technical means has been adopted in which seeds of the same species are adhered and laid on the floor soil of a nursery box, covered with soil from above, and watered to raise seedlings.

As a seeding paper used for the technical means, a method of applying a pressure-sensitive adhesive on a water-soluble paper in spots is disclosed in Japanese Utility Model Publication No. 54-4711.
Apply the adhesive in spots on water-soluble paper with water drain holes,
Furthermore, a method of laminating a protective paper that prevents unnecessary sticking of an adhesive before use is disclosed in Japanese Utility Model Publication No. Sho 60-55309, in which a seeding frame having seed passage holes is provided on a seeding paper coated with an adhesive in a band shape. A method for sticking seeds through the is described in JP-A-60-248106.

<Problems to be Solved by the Invention> However, the above-mentioned Japanese Utility Model Application Laid-Open No. 54-44711
The seeding paper presented in Japanese Patent No. 60-248106 has an adhesive for fixing seeds (hereinafter, an adhesive for fixing seeds is referred to as a seed adhesive) applied to the seeding paper so that the seeds are adhered. The fact is that if they are stacked or stored in a roll before use, they cause unnecessary sticking to each other. Therefore, when they are peeled off during use, the fibers of the seeding paper and the like adhere to the pressure-sensitive adhesive, and the residual adhesive strength of the pressure-sensitive adhesive decreases, making it difficult to adhere seeds. Furthermore, it was not possible to peel off the unnecessarily adhered seeding papers, and the seeding paper broke,
Often disabled. Therefore, it is practically impossible to store a large amount of sowing paper or carry it to the place of use, and it was difficult to put it into practical use.

Also, as presented in Japanese Utility Model Publication No. 60-55309,
The method of placing protective paper on the seeding paper to prevent unnecessary sticking of the adhesive has a practical problem because the price of the seeding paper is high.

An object of the present invention is to solve the problems of the conventional techniques as described above. That is, it is an object of the present invention to provide an inexpensive seeding paper, in which the pressure-sensitive adhesive is easily peeled off even after being unnecessarily attached to the seeding paper, and there is no need to use protective paper.

<Means for Solving the Problems> The inventors of the present invention have conducted diligent studies to solve the above-mentioned problems, and as a result, the entire underwater speed-dispersed paper or the thin paper easily corroded contains a fluorine-based water repellent and an oil repellent. After that, if a pressure-sensitive adhesive having an adhesive force in a specific range is applied or attached by printing, the pressure-sensitive adhesive can be easily peeled off even after unnecessarily sticking to the paper, and the residual adhesive force of the pressure-sensitive adhesive is not significantly reduced. We have found this and completed the present invention.

The underwater rapid dispersion paper, as disclosed in JP-B-48-27605, fibrous fibrin glycolic acid, or beaten by a usual method using a papermaking raw material containing a polyvalent metal salt of the acid, It is manufactured by adding an alkali metal compound to a paper sheet formed by papermaking and then drying.

Further, thin paper that is easily corroded is made from one or more of chemical pulp of wood, semi-chemical pulp, groundwood pulp, thermomechanical pulp as a raw material so that it is easily corroded in the soil by decay fungi Tray, the basis weight is 10 ~
50 g / m ^2, preferably 20 to 30 g / m ^2, sizing agent to prevent the corrosion, preservatives, free of antifungal agents, and corrosion have been thin paper separated into single fibers, the sheet form collapses It does not contain a paper-strengthening agent so that it can be easily handled. In addition to the wood pulp, pulp that is a raw material for the thin paper may be pulp manufactured from non-wood such as flax, hemp, bagasse, and rice straw.

The time required for the thin paper to be corroded in the soil and the sheet form to collapse depends on the type of pulp constituting the thin paper, the basis weight, the type of decay fungus present in the soil, and environmental conditions. It takes 2 to 4 weeks even considering the fluctuation factors.

That is, the method for producing seed paper of the present invention is characterized in that the above-mentioned underwater rapid dispersion paper and the thin paper easily corroded are made to contain a release agent and a pressure sensitive adhesive is attached.

First, rapid dispersion in water obtained by adding an aqueous solution or emulsion of a fluorine-based water repellent or oil repellent to wood pulp and fibrous fibrin glycolic acid dispersed in water to make paper, and then applying a basic compound. A method of producing a seed adhesive having a viscosity of 1000 to 20000 CPS on paper by screen printing.

Secondly, the viscosity of water-dispersed paper obtained by paper-making paper pulp and fibrous fibrin glycolic acid dispersed in water, and then impregnating a mixture of a basic compound, a fluorine-based water repellent and an oil repellent.
A method for producing a 1000 to 20000 CPS seed adhesive by screen printing.

Thirdly, a seed adhesive having a viscosity of 1000 to 20000 CPS is attached by screen printing to a thin paper that is easily corroded by adding an aqueous solution or emulsion of a fluorine-based water repellent or oil repellent to wood pulp dispersed in water. Method.

Fluorine-based water and oil repellents that give releasability to seed adhesives are Sumirez resins FP150, FP110, FP210 (Sumitomo Chemical Co., Ltd. products), Asahi Guard AG530, AG550.
An aqueous solution or emulsion of a fluororesin such as (a product of Asahi Glass Co., Ltd.) or an organic solvent solution of a fluororesin such as Asahi Guard AG650 can be used.

Fluorine-based water repellent, as a method of incorporating the oil repellent in the underwater rapid dispersion paper, after adding the fluororesin aqueous solution or emulsion to the papermaking raw material consisting of wood pulp and fibrous fibrin glycolic acid dispersed in water, Japanese Patent Publication Sho 48-276
The method disclosed in 05 can be used to produce an underwater rapid dispersion paper. The addition ratio of the fluororesin aqueous solution or emulsion to the papermaking raw material composed of wood pulp and fibrous fibrin glycolic acid is 0.1 to 5.0%, preferably 0.2 to 1.0% as a solid content.

The method of incorporating a fluorine-based water repellent or oil repellent into a thin paper that is easily corroded may be modified by using only wood panels as the papermaking raw material in the above method. An epoxy resin or a cationic polymer type fixing agent may be added in order to accelerate the fixing of the fluorine-based water repellent and the oil repellent to the papermaking raw material.

The method of applying the fluorine-based water repellent and oil repellent to the underwater fast-dispersion paper is as follows.A papermaking raw material composed of wood pulp and fibrous fibrin glycolic acid is beaten and made into paper by an ordinary method, and an alkali metal compound is formed on the formed web. And a fluorine-based water repellent and an oil repellent are added, followed by drying. The mixture exhibits properties such as an aqueous solution and an emulsion depending on the type of fluorine-based water repellent and oil repellent used, but in any case, the concentration of the fluorine-based water repellent and oil repellent is 0.01 to 2.0% as a solid content.
The content of the fluorine-based water repellent and the oil repellent in the seed paper should be 0.01 to 2.0%, preferably 0.05 to 1.0% as a solid content.

Fluorine-based water repellent obtained by the above method, the pressure-sensitive adhesive to be attached to the underwater quick dispersion paper or the easy corrosion thin paper containing the oil repellent, if the adhesive strength is 0.1 ~ 200 g / cm, the type It can be used independently.

The adhesive strength of the pressure-sensitive adhesive used in the present invention means an aqueous solution, emulsion, or organic solvent solution of the pressure-sensitive adhesive having a thickness of 25 μm.
m coated on polyester film and dried, 35
A pressure-sensitive adhesive layer having a thickness of μm was formed, and then the pressure-sensitive adhesive surface was bonded to a stainless plate and pressure-bonded, and the adhesive force between them was measured by the 180-degree peeling method described in JIS Z0237. It is a thing.

When the adhesive strength of the pressure-sensitive adhesive measured by the above method is lower than 0.1 g / cm, the seeds are not adhered to the surface of the pressure-sensitive adhesive attached to the base paper, and the function as a sowing paper is not expressed. Further, when the adhesive strength exceeds 200 g / cm, in the seeding paper in which the adhesive is affixed to the base paper having a peelable component, the peelability between the adhesive and the base paper of another seeding paper is lost, When a large number of the seed papers are stacked, stored and transported, it becomes impossible to peel the seed papers one by one.

As the type of adhesive, acrylic ester copolymer,
Vinyl acetate-acrylic acid ester copolymer, styrene-
Butadiene copolymer, styrene-olefin copolymer,
Petroleum-based adhesive resins and the like are listed, and these may be used alone or in combination of one or more. The adhesive can be screen-printed with an emulsion of clay 1000 to 20000 CPS or an organic solvent solution. Further, as long as it melts in the range of 50 to 200 ° C., it can be attached to the seed paper simply by applying the melt in a linear or dot form and then cooling.

Next, the configuration of the present invention will be described with reference to the drawings.

FIG. 1 is a plan view of an embodiment of a sowing paper according to the present invention, and FIG. 3 is a sectional view thereof. As shown in the figure, in the present invention, a water-dispersible paper or a thin paper (1) which is easily corroded contains a peelable component for the seed adhesive (3), and the seed adhesive (4) is provided at a predetermined interval on the upper surface thereof. This is the configuration provided. Although the figure shows an example in which the seed adhesive is provided in a discontinuous form, that is, in a dot form, it is needless to say that the seed adhesive may be provided in a continuous form, for example, in a linear form.

<Operation> As shown in the above description and the drawings, the present invention is a light-peelable pressure-sensitive adhesive printed or coated with a fluorine-based water-repellent or oil-repellent agent contained in underwater rapid dispersion paper or thin paper that is easily corroded. This combination has the effect that the pressure-sensitive adhesive attached to the seeding paper can be easily peeled off even if it is unwantedly attached to another seeding paper.

<Examples> Hereinafter, the present invention will be specifically described with reference to Examples, but the present invention is not limited thereto.

[Example 1] Fluorine-based water- and oil-repellent fixing agent Sumirez Resin FR-2P (Sumitomo Chemical Co., Ltd. product) was completely dried as a papermaking raw material consisting of wood pulp 20% by weight and fibrous fibrin glycolic acid 80% by weight. After adding 0.2% by weight (solid content) to the weight and stirring, 0.5% by weight of the fluorine-based water and oil repellent agent Sumirez Resin FP150 (Sumitomo Chemical Co., Ltd. product) relative to the absolute dry weight of the papermaking material
(Solid content) was added, papermaking was performed, and the formed paper web was coated with a sodium carbonate aqueous solution using a roll coater and then dried to obtain a base paper.

Next, adjust the viscosity of the acrylic adhesive (Siden chemical product) with an adhesive force of 50 g / cm to a viscosity of 10000 CPS, and use a screen printing machine to make a circle with a diameter of 1.5 mm on the base paper of 20 m.
A sheet-shaped sowing paper was manufactured by attaching the paper at m intervals.

100 sheets of the sowing paper were stacked with the adhesive-attached side facing up, 10k
As a result of pressing under a load of g / m ² and observing the peelability after 24 hours, the seed papers could be peeled without resistance. On the surface of the adhesive, the constituent fibers of the sowing paper did not adhere, and the residual adhesion rate was 95%.
% Or more, and the seed adhesion was good.

Furthermore, when seeding paper with seeds was laid on the soil, covered with soil and sprinkled with water, the seeding paper was easily dispersed and dissolved to lose the sheet form, and only the seeds remained in the soil.

[Example 2] Papermaking raw material consisting of 20% by weight of wood pulp and 80% by weight of fibrous fibrin glycolic acid was beaten and then made into paper, and 0.15% by weight (solid content) of fluorine-based water repellent was formed on the formed web. A base paper was obtained by applying an aqueous solution of sodium carbonate containing the oil repellent Sumirez Resin FP150 (Sumitomo Chemical Co., Ltd. product) and drying. The base paper contained 0.3% by weight of FP150. In order to measure the peeling resistance of the base paper to the adhesive, an adhesive tape having a peel strength of 150 g / cm with a stainless steel plate (product of Soken Kako Co., Ltd.) was pasted on the upper surface of the base paper, and it was described in JIS Z0237. 180
As a result of measuring the peel strength by the peeling and peeling method, it was found that the base paper and the adhesive tape were easily peeled at 20 g / cm or less, and had sufficient peelability as a seed paper.

Next, a seed paper was prepared by adhering an organic solvent solution of two kinds of acrylic adhesives (product of Sanyo Chemical Industries, Ltd.) having different adhesive strengths to the entire surface of one side of the base paper using a screen printer, and the adhesive adhering surface was prepared. Table 1 shows the results of observing the peelability immediately after stacking two sheets on top of each other and pressing them under a load of 10 kg / m ² . When a pressure-sensitive adhesive with an adhesive strength of 600 g / cm is attached, the peelability is extremely poor after the two pressure-sensitive adhesive-attached surfaces are stacked and pressure-bonded, and material destruction occurs. Was impossible to peel off. On the other hand, adhesive strength 25g /
When the cm adhesive is attached, the seeding paper which is laminated and press-bonded can be easily peeled off, and the residual adhesive strength of the adhesive after peeling is 95% or more, so the seeds are firmly bonded. It was possible. Furthermore, by changing the adhesive strength of the adhesive,
As a result of measuring the relationship between the adhesive strength and the peel strength, if the adhesive strength of the pressure-sensitive adhesive is 200 g / cm or less, good peeling property should be obtained even after two pressure-sensitive adhesive papers are stacked and pressure-bonded. There was found.

From the above results, we have impregnated the underwater quick dispersion paper with fluorine-based water and oil repellents and It is clear that by applying a g / cm or less adhesive it is possible to produce a sowing paper that can be easily peeled off even after being overlaid on each other.

[Example 3] A water-based rapid dispersion paper impregnated with a fluorine-based water and oil repellent was produced in the same manner as in Example 2, and a styrene-butadiene copolymer having an adhesive strength of 150 g / cm was formed on the upper surface of the underwater quick dispersion paper. System adhesive (H
B Fuller Co., Ltd. product) 160 ℃ melt is sprayed from the spray nozzle of the hot melt applicator, and the width is 1.5mm on the base paper.
After being continuously applied with, the tape was slit into a tape shape having a width of 20 mm to produce a tape-shaped winding type seeding paper.

After the tape-shaped roll of the seed paper was left at room temperature for one month, the peelability when the roll was rewound was observed. The seed papers could be peeled without resistance. The constituent fibers of the sowing paper are not attached to the surface of the adhesive, and the residual adhesion rate is 95% or more,
Since the seeds have good adhesiveness, it was shown that the conventionally required protective paper can be omitted.

Furthermore, when seeding paper with seeds was laid on the soil and covered with soil and then sprinkled with water, the seeding paper easily disperses and dissolves, losing the sheet form, and only the seeds remain in the soil. , Showed that the oil repellent did not interfere with the dissolving and dispersing ability of the seed paper at all.

[Example 4] Fluorine-based water repellent and oil repellent fixing agent AG Fix S45 (a product of Asahi Glass Co., Ltd.) was added to a papermaking raw material made of wood pulp in an amount of 0.3% by weight (solid content) based on the dry weight of the papermaking raw material and stirred. After that, 0.5% by weight (solid content) of the fluorine-based water and oil repellent Asahi Guard AG530 (a product of Asahi Glass Co., Ltd.) relative to the dry weight of the papermaking raw material was added to the papermaking process to produce a base paper with a basis weight of 30 g / m ^2. did.

Next, an acrylic adhesive (Siden chemical product) emulsion with an adhesive strength of 130 g / cm was adjusted to a viscosity of 10000 CPS, and a circle with a diameter of 1.5 mm was formed on the base paper using a screen printing machine.
A sheet-shaped sowing paper was produced by attaching the paper at 0 mm intervals.

100 sheets of the sowing paper are stacked with the adhesive-attached side facing up, 5 kg
As a result of observing the releasability after pressing for 24 hours under a load of / m ² , the seed papers were peeled without resistance. Since the constituent fibers of the sowing paper do not adhere to the surface of the adhesive, the residual adhesion rate is 95%.
As described above, it was shown that the protective paper, which has been conventionally required, can be omitted because the seed has good adhesiveness.

Next, spinach seeds (Atalya plantation product) were attached to the sowing paper, laid on the floor soil and covered with soil, and the results of observing the properties of the sowing paper when harvesting the strain grown after 45 days, Was corroded and lost its sheet form.

<Effects of the Invention> According to the present invention, it becomes unnecessary to use expensive protective paper for preventing unwanted adhesion of the adhesive, which is required for the conventional seeding paper,
Not only can the seeding paper be provided at a low price, but it is also possible to supply it in the form of a roll, which was previously impossible due to unnecessary adhesion.
It is clear that the overall ease of handling has improved.

[Brief description of drawings]

FIG. 1 is a plan view of a seeding paper obtained by the present invention, and FIG.
FIG. 3 is a sectional view of a conventional seeding paper, and FIG. 3 is a sectional view of a seeding paper obtained by the present invention. 1: Underwater quick dispersion paper or thin paper that is easy to corrode. 2: A coating layer having a peelable component. 3: A layer containing a peelable component.
4: Seed adhesive.

Claims (3)

[Claims] 1. A method for producing a sowing paper in which a pressure-sensitive adhesive for fixing seeds is added, wherein an aqueous solution or emulsion of a fluorine-based water repellent or oil repellent is added to wood pulp and fibrous fibrin glycolic acid dispersed in water. A paper made of paper, and then coated with a basic compound.
A method for producing a sowing paper, characterized in that an adhesive for fixing the seeds of (1) is attached by screen printing. 2. A method for producing a sowing paper in which a pressure-sensitive adhesive for fixing seeds is impregnated, wherein wood pulp and fibrous fibrin glycolic acid dispersed in water are made into paper, followed by a basic compound and a fluorine-based water repellent and water repellent agent. A method for producing sowing paper, characterized in that a pressure-sensitive adhesive for fixing seeds having a viscosity of 1000 to 20000 CPS is attached by screen printing to an underwater rapid dispersion paper obtained by impregnating a mixed solution with an oil agent. 3. A method for producing a sowing paper in which a pressure-sensitive adhesive for fixing seeds is attached, to a thin paper which is easily corroded by adding an aqueous solution or emulsion of a fluorine-based water repellent or oil repellent to wood pulp dispersed in water. A method for producing sowing paper, which comprises applying an adhesive for fixing seeds having a viscosity of 1000 to 20000 CPS by screen printing.