JPH1060390A - Horticultural pressure-sensitive adhesive tape - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain a horticultural pressure-sensitive adhesive tape having excellent mechanical properties and water retentivity and used as a graft-fixing tape which need not be removed and as a tape stuck to bulbs to distinguish the colors of flowers of the plants grown therefrom and need not be peeled therefrom when they are planted by forming a pressure-sensitive adhesive layer on at least either surface of a specified tape support. SOLUTION: This tape has a tape support being a film of a water-soluble or -dispersible resin based on polyvinyl alcohol and optionally colored with a dye or a pigment and is used for example as a graft-fixing pressure-sensitive tape used when a branch is grafted onto a tree such as a garden tree or a fruit tree, when a different plant is grafted onto a vegetable or in grafting to improve a plant or as a tape stuck to bulbs to distinguish the colors of flowers of the plants grown therefrom. For example, with respect to the structure of the tape 1, a layer 3 of a water-soluble or -dispersible pressure-sensitive adhesive is applied to the entire surface of either surface of a support being a water-soluble film 2. The film 2 is chiefly made from a PVA having a degree of polymerization of 1,700 and a degree of saponification of 96mol%, 8wt.%, based on the PVA, glycerol being a plasticizer, a pigmented film and a water-soluble pressure- sensitive adhesive.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an adhesive tape for grafting when grafting a tree branch such as a garden tree or a fruit tree, a vegetable such as an eggplant or a watermelon with another kind of plant or an improved plant, or The present invention relates to a horticultural adhesive tape for use as a tape for identifying the color of a plant such as a flower or a vegetable when it grows by attaching the color to a bulb.

[0002]

2. Description of the Related Art Various grafts have been made to improve various trees and vegetables and to produce a plurality of plants from one plant. These grafts are made by cutting the trunk of trees or vegetables diagonally or by cutting the trunk into wedges, applying a new graft to this, and joining the conduit section, and then, from the surroundings, plastic called so-called vinyl tape. It is fixed firmly so that it does not come off with the adhesive tape. Also,
Although flower and vegetable bulbs of various colors are planted and cultivated on a farm or a vegetable garden, it is necessary to identify the color of the plant when it grows up with the bulb. At present, bulbs are wrapped with the color described on the bag, and colored plastic adhesive tape is attached to the bulbs to identify the colors.

Conventionally, tapes used for fixing grafts are insoluble in water, impermeable to water, and do not decompose spontaneously. Therefore, they hinder the growth of grafts and have no water retention. However, it was difficult to graft properly because of dryness and the like, requiring skill. Also, after a certain period of time, it was necessary to remove the tape after the trees were fully connected. Furthermore, when planting bulbs such as tulips with several types of colors in one flower bed, it is often difficult to distinguish the colors when the bulbs are taken out of the bag that describes the color, and the above-mentioned conventional tape with color is often used. If attached, the tape is too strong to damage the bulb when peeled off the bulb, or even if it is peeled clean, the bulb will be damaged,
The germination rate and growth are decreasing, which is problematic.

[0004]

SUMMARY OF THE INVENTION It is an object of the present invention to eliminate the above-mentioned drawbacks and to eliminate the drawbacks of general plastic pressure-sensitive adhesive tapes having excessively high durability and tensile strength. In other words, the grafting tape has excellent mechanical properties, functions well, has excellent water retention, does not dry the grafted part, and dissolves and disintegrates after a certain period of time. There is a need for a horticultural adhesive tape that can be directly attached to a bulb to clarify the color of the plant and be used as a bulb color identification tape that can be planted with the identification tape attached. It is being done.

[0005]

Means for Solving the Problems The inventors of the present invention have prepared a water-soluble or water-dispersible film substrate made of polyvinyl alcohol (hereinafter sometimes abbreviated as PVA) and a water-soluble or water-dispersible pressure-sensitive adhesive. The present invention has been found that the adhesive tape for grafting, which is characterized by being constituted, shows excellent physical properties. Further, the above problem has been solved by using a water-soluble pressure-sensitive adhesive tape composed of a bulb color identification tape, wherein the base material and the pressure-sensitive adhesive of the colored pressure-sensitive adhesive tape are water-soluble or water-dispersible. Was.

That is, a water-soluble or water-dispersible resin film mainly composed of polyvinyl alcohol is used as a tape substrate, and a water-soluble or water-dispersible pressure-sensitive adhesive layer is formed on one or both surfaces of the tape substrate. Gardening adhesive tape.

When the tape is mixed with a dye or pigment to be colored, the use in the horticultural field is expanded.

The base material of the adhesive tape for horticulture of the present invention is PVA.
Since it is composed of a water-soluble or water-dispersible film composed mainly of styrene, it has excellent strength and rigidity, and has excellent physical properties that do not allow it to follow other plastic films. Since it has excellent weather resistance and can maintain its physical properties for a long period of time, it is used for various applications such as agricultural chemical packaging films, embroidery base fabrics and seed tapes. Also, this film is P
By properly changing the degree of saponification of VA, it dissolves in water,
The decomposition period can be changed in various ways, and the properties as a biodegradable polymer can be used effectively. In addition, it has excellent water retention properties and has a property of always retaining a certain amount of water, which also provides excellent physical properties for this use.

Furthermore, it is easy to be colored into various colors, and has a feature that it easily dissolves or disperses in water under the ground, and further returns to nature by biodegradation. Since the adhesive for forming the adhesive layer on the base material is also water-soluble or dispersed in water like the base material,
Since the entire bulb color identification tape dissolves and disperses in water in the ground, there is no hindrance to the growth of the bulb. Therefore, by applying the gardening adhesive tape of the present invention directly to the bulb, the color of the plant can be clearly identified, and the plant can be planted with the identification tape attached.

The horticultural adhesive tape of the present invention is characterized in that the PVA film and the adhesive as the base material of the tape are water-soluble or water-dispersible. Here, the water-soluble or water-dispersible resin film serving as the base material generally refers to a film that dissolves or disperses in water. A film that can be adjusted in various ways until it dissolves and disperses after several months, specifically, a film formed of PVA, but in a special case, a cellulose-based or starch-based film may be used.

The PVA is a saponified product of a polymer of a vinyl ester such as vinyl acetate, and is usually formed by casting an aqueous PVA solution on a hot roll. Further, the water-soluble or water-dispersible film of the present invention can also be produced by extruding a mixture of PVA and a plasticizer with a hot melt and forming a film by extrusion from a T-die or by inflation film formation. By changing the degree of saponification of PVA as a control of solubility in water, a film with a high dissolution rate, a film with a low dissolution rate in cold water, and a film that dissolves and biodegrades after several months can be obtained. As the degree, 50 to 100 mol%, preferably 70 to 99.5 mol% of PVA is used.
Especially for grafting trees, the film strength and morphological stability are required for a considerably long period of time, so that 95 to 99.5 mol% is desirable. The degree of polymerization of PVA is important in relation to the strength of the film and the like, and is usually from 500 to 8,000, preferably from 1,000 to 4,000.

In the production of the horticultural pressure-sensitive adhesive tape of the present invention, a plasticizer may be added in order to maintain the moisture retention of the film and the flexibility at low temperatures. Examples of the plasticizer include commonly used compounds such as glycerin, polyethylene glycol, diglycerin, diethylene glycol, glycerin, and compounds obtained by adding ethylene oxide to sorbitol, and the added amount is 5 to 50% / PVA.

When used as an adhesive tape, a carboxyl group or a salt thereof, a sulfonic acid group or a salt thereof, a polyoxyethylene group, a quaternary ammonium base, or the like is added to PVA in order to adjust solubility in water. Introduced modified PVA can also be used. Further, in order to impart the form stability of the water-soluble film, a film formed by adding an inorganic filler such as clay, talc, calcium carbonate, mica, and reinforcing fibers such as glass fiber, cellulose fiber, and vinylon fiber is also used. be able to. The thickness of the film used is not particularly limited, but in consideration of the strength, rigidity, dissolution rate in water, etc. of the tape, it is usually 10 to 500 μm.
m. Further, as the film, an embossed or matted film can be used.

As for the water-soluble or water-dispersible pressure-sensitive adhesive used in the present invention, many patent applications have already been filed and there are many commercial products. Many of these are copolymers of acrylic acid esters and monomers having a carboxyl group or a hydroxyl group, and impart a hydrophilic group such as a carboxyl group or a salt thereof, or a hydroxyl group to the adhesive component of the polyacrylic ester, and dissolve in water. Alternatively, it is water-dispersible. The pressure-sensitive adhesive of the present invention is not limited to the above-mentioned components, and any water-soluble or water-dispersible pressure-sensitive adhesive can be used.

The horticultural pressure-sensitive adhesive tape of the present invention is produced by applying a water-soluble pressure-sensitive adhesive to one surface of the water-soluble or water-dispersible film. The amount of the adhesive applied is 3 to 50 g / m ² , preferably 5 to 20 g / m ² on one side. Normal,
The pressure-sensitive adhesive is applied to one surface of the water-soluble film, and may be applied in a dot or block shape on the film to increase the dissolution rate or improve flexibility in some cases. .

When working using such an adhesive tape, a coating layer for protecting the adhesive layer can be provided outside the water-soluble or water-dispersible adhesive. The cover layer refers to a release paper or a release film that protects the pressure-sensitive adhesive layer and allows the pressure-sensitive adhesive layer to be peeled off and adhered when used. These coating layers are used on one or both sides of a water-soluble or water-dispersible pressure-sensitive adhesive film. The width and length of the tape are not particularly limited. The width and length are set appropriately as necessary, but the normal width
0.5 to 10 cm is appropriate. A width of 0.5 to 5 cm is appropriate for use by attaching to a bulb.

The adhesive tape for horticulture of the present invention requires a certain degree of elongation because it is necessary to fix the grafted portion of the plant. However, if the degree of elongation is too large, fixing may be difficult. Therefore, a water-soluble or water-dispersible nonwoven fabric or the like may be laminated on the grafting tape of the present invention to appropriately suppress the elongation. Further, the tape of the present invention can be appropriately colored so as not to give a sense of discomfort when wound around a plant. There is no particular limitation on the coloring, but the dye or pigment
A method of forming a film by adding it to a VA aqueous solution is employed. An opaque colored tape can be prepared by adding a white pigment such as titanium oxide or calcium carbonate. Plants grafted using such a tape can be applied to all kinds of trees, fruit trees, vegetables and the like, and are not particularly limited.

It is convenient to color the adhesive tape so as to show the color of a plant flower or the like. Unlike a film of polyethylene or polypropylene, a film containing PVA as a main component can be easily dyed. Usually, the method of dyeing is not particularly limited, but a method of forming a film by adding a dye or a pigment to a PVA aqueous solution at the time of film formation is employed. Also, add a white pigment such as titanium oxide or calcium carbonate to make a white tape and mark it with a colored oil-based felt-tip pen when actually affixing it to a bulb or after attaching it. Can be identified.

The bulb to which the tape is applied is not particularly limited as long as it is a bulb of a plant to be grown. For example, lily, bulb bulb such as tulip, bulb bulb such as saffron, gladiolus, tuber bulb such as cyclamen, caradium, iris,
There are rhizome bulbs such as Amadokoro and tuber bulbs such as dahlia, which can be used for any of these.

[0020]

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, embodiments of the present invention will be described.
This will be described with reference to the drawings. FIG. 1 is a longitudinal sectional view showing the structure of a horticultural adhesive tape 1 of the present invention. A water-soluble film 2 as a base material and a water-soluble or water-dispersible pressure-sensitive adhesive layer 3 are coated on one surface of the film 2. It consists of a structure. Here, the water-soluble film has a polymerization degree of 1,700 and a saponification degree of 96 mol%.
Of PVA as main agent and glycerin 8% / P as plasticizer
This is a film colored by adding VA and a pigment.
The water-soluble pressure-sensitive adhesive is a water-soluble pressure-sensitive adhesive obtained by copolymerizing any one of butyl acrylate, octyl acrylate, methyl acrylate, methacrylic acid, and sodium salt of acrylic acid. The thickness of the base water-soluble film is 70
μm, the application amount of the water-soluble adhesive is 15 g / m ² .

The grafting of the improved Accra complement wood was carried out on the rootstock of the garden tree Accra. The stock was cut diagonally, and a supplementary tree stored in a cool and dark place was applied thereto, and a grafting tape of the present invention having a width of 18 mm was wound and fixed. About 1.
The film was strong enough for five months, and the grafts grew steadily. After about three months, the film had almost completely dissolved or degraded.

Instead of the above PVA, the polymerization degree is 1,700,
A film was prepared in the same manner except that a modified PVA containing a saponification degree of 96 mol% and 2 mol% of maleic anhydride was used, and a tape having a width of 18 mm was prepared. Using this tape, grafting of "watermelon" was performed on the rootstock of "pumpkin". About a month later, the watermelon grew well, and the tape had disappeared after the stem had coalesced.

FIG. 2 is a longitudinal sectional view of the colored adhesive tape 11 for gardening suitable for bulb color identification. This water-soluble film is mainly composed of PVA having a polymerization degree of 1,700 and a saponification degree of 88 mol%, and glycerin is used as a plasticizer. Colored film 12 with 15% / PVA and dye or pigment added. Water-soluble adhesive layer 13
Is a water-soluble pressure-sensitive adhesive obtained by copolymerizing any of butyl acrylate, octyl acrylate, methyl acrylate, methacrylic acid, and sodium salt of acrylic acid as described above.

FIG. 3 is a perspective view of a colored adhesive tape 11 having a width of 2 cm and a colored adhesive tape 11 of the same color as that of the flower attached to a tulip bulb 10. Put the attached bulb 10 on tape 11
When the plant was planted in a flower bed without peeling, the tulip could be used without any problem for growth.

A white water-soluble film 12 was prepared in the same manner as described above, except that 15% of calcium carbonate was added to modified PVA containing a polymerization degree of 1,700, a degree of saponification of 96 mol%, and 4 mol% of maleic anhydride. A pressure-sensitive adhesive layer 13 is formed by applying the above-mentioned pressure-sensitive adhesive, and is embossed to form a 2 cm wide tape.
11 was created. This was affixed to the bulb in the same manner as described above as shown in FIG. 3, and the type and color of the bulb displayed with a felt-tip pen were planted as they were on the flowerbed. As a result, they could be used without any problem for growth.

[0026]

The horticultural pressure-sensitive adhesive tape of the present invention comprises a water-soluble or water-dispersible film base made of polyvinyl alcohol and a water-soluble or water-dispersible pressure-sensitive adhesive. As a tape, it has excellent functions such as strength, constant elongation, and water retention, and dissolves and disintegrates spontaneously after a certain period of time after fixing the graft.
It is suitable as an adhesive tape for grafting that does not need to be removed.

The present invention is also useful as a tape to be attached to a bulb such as a flower or a vegetable to identify the color of a plant when it grows. The tape can be colored in various colors, and the whole tape is water-soluble or Since it is water-dispersible and biodegrades in the ground to return to nature, it is extremely useful as a color identification tape that can be planted without peeling off from the bulb. Utilizing such properties, it can be widely used as a gardening adhesive tape.

[Brief description of the drawings]

FIG. 1 is a longitudinal sectional view showing the structure of a gardening adhesive tape.

FIG. 2 is a longitudinal sectional view of a colored adhesive tape for identifying the color of a bulb.

FIG. 3 is a perspective view showing a state where a colored adhesive tape is attached to a bulb.

[Explanation of symbols]

 1 Gardening adhesive tape 2 Water-soluble film 3 Adhesive layer 10 Bulb 11 Gardening colored adhesive tape 12 Water-soluble colored film 13 Colored adhesive layer

──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. ⁶ Identification number Agency reference number FI Technical display location A01G 1/06 A01G 1/06 B G09F 3/10 G09F 3/10 A

Claims (2)

[Claims] 1. A tape base comprising a water-soluble or water-dispersible resin film mainly composed of polyvinyl alcohol,
A horticultural adhesive tape comprising a water-soluble or water-dispersible pressure-sensitive adhesive layer formed on one or both surfaces of the tape base material. 2. The horticultural adhesive tape according to claim 1, wherein the tape base is colored by mixing a dye or a pigment.