JP2000025830A - Biodegradable composite sheet, bag and vegetation material storage bag using the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a biodegradable compound sheet optimum to manufacture a vegetation material storage bag which can be used for a storage bag in carrying and storing the vegetation material, and form open hole parts through water sprinkling or raining after installed on the ground, easy in vegetation and completely unnecessary for collection after the vegetation is completed, a bag using the sheet, and the vegetation material storage bag. SOLUTION: In a compound sheet, a strip-like lamination part 2 formed of a biodegradable resin and a non-lamination part are alternately provided on a surface of a water-soluble or water-dispersant base material 1. A biodegradable compound sheet in which the lamination part 2 is not less than 50% in area of the base material, or a biodegradable compound sheet in which a part between the strip-like lamination parts 2 is connected by a straight or strip-like lamination part to form a net-like biodegradable lamination part, is used and heat-sealed to form a bag and a vegetation material storage bag joined with the biodegradable resin of the lamination part.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION The present invention relates to a use in which a part of a bag is washed away when exposed to a large amount of water, and a hole can be formed almost uniformly in the whole bag. For example, it relates to a material for a bag for storing vegetation material such as seeds, cultivation soil, fertilizer, soil improvement material, water retention material, and a vegetation material storage bag made by using the material, or a komase bag for fishing. The vegetation material storage bag functions as a storage bag during transportation and storage, has a function to prevent the vegetation material from scattering and collapsing after laying, is degradable by microorganisms, and does not need to be manually collected after vegetation is completed. A bag is obtained.

[0002]

2. Description of the Related Art Seeds, fertilizers, cultivation soil, etc. are enclosed in a bag made of a water-dispersible sheet so that plants can be easily grown on flower beds. After laying on the flower beds, the bags are dispersed or dissolved by watering. A vegetation material storage bag that exposes the contents is used. For lawn construction, mats made by adding seeds and fertilizer to waste cotton blocks or mats made by laminating and integrating hot melt adhesive with seeds and fertilizer between water-dispersible nonwoven fabric and perforated polyethylene film are available. These are used to lay grass on the ground surface and then cover the soil to grow turf.

[0003] In vegetation performed to prevent runoff and collapse of soil on the slopes of roads and lands, a sheet in which seeds, fertilizers, and the like are sandwiched between two or more nonwoven fabrics or thin paper sheets is laminated with a synthetic fiber net. Vegetation nets, seeds, fertilizers,
A vegetation mat in which a mat in which cultivated soil and the like are sealed in a bag of synthetic resin film is laminated and integrated with a synthetic fiber net.
A vegetation mat or the like is used in which a small bag made of a water-dispersible nonwoven fabric enclosing fertilizer, cultivation soil, and the like is mounted in a large bag of a synthetic fiber net.

A vegetation net is provided with a bag containing vegetation materials such as plant seeds and fertilizers.
55851, Japanese Patent Publication No. 57-55852, Japanese Patent Publication No. 59-37369
And Japanese Patent Publication No. 4-22524. Japanese Patent Publication No. 59-37369 discloses a technique relating to a vegetation net in which a bag made of a water-vulnerable sheet and a bag made of a water-insoluble sheet are filled with a vegetation material, respectively, and these are placed in a storage portion of a mesh body. Therefore, vegetation material storage bags using insoluble sheets are used.

[0005] Regarding a vegetation material storage bag used without being attached to a vegetation net, Japanese Patent Application Laid-Open No. 7-189257 discloses that when a bag is laid on a slope, the portion of the bag located above the slope is a water-dispersible sheet. The part of the bag located on the lower side of the body and the slope is composed of a hardly decomposable sheet, and the part of the bag in contact with the ground surface is composed of a biodegradable sheet. The water dispersible sheet is dispersed and dissolved by rainwater. There is disclosed a vegetation material storage bag in which plants are easy to germinate and a hardly decomposable sheet body can prevent the vegetation material from collapsing due to wind and rain.

[0006] As for fishing Komase bags, Japanese Patent Application Laid-Open Nos. 08-252068 and 09-172929 disclose Komase bags made of a water-soluble or water-decomposable base material. When attached to a fishing line, they all required a sowing basket.

[0007]

The above-mentioned vegetation material storage bag for growing flowers on a flower bed or the like has an advantage that the bag can be easily laid because the bag is dispersed and dissolved by watering and the contents are easily exposed. However, the exposed vegetation material was easily scattered and flowed out by the wind and rain, making it difficult to evenly vegetate from the laid storage bags.

Materials using a material that does not biodegrade in the soil, such as a lawn-building mat or a vegetation material storage bag using an insoluble sheet described in Japanese Patent Publication No. 59-37369, are non-microbial biodegradable nets and nonwoven fabrics. However, the maintenance and maintenance of vegetation was difficult due to the obstruction of fertilization and mowing work by films, adhesives, etc. In addition,
The vegetation material storage bag described in JP-A-37369 is composed of a vegetation material storage bag made of an insoluble sheet and a vegetation material storage bag made of a water-vulnerable sheet. Because the roots of the plants did not penetrate and the plants did not take root, it was difficult to apply vegetation uniformly on the entire laying surface, and it was not possible to complete vegetation that was natural and comfortable.

Further, the vegetation material storage bag described in the above-mentioned Japanese Patent Application Laid-Open No. 7-189257 has a structure in which one bag is formed of a biodegradable sheet,
Because it is composed of three types of materials, a water-dispersible sheet and a hardly decomposable sheet, the structure and handling method of the bag are complicated, and it has been difficult to reduce the manufacturing cost. The hard-to-decompose sheet used for part of the bag is
It has also been pointed out that the maintenance and maintenance of vegetation becomes difficult as described above because the microorganisms do not decompose in soil.

Therefore, the objects of the present invention are as follows: 1) it can be used as a packaging bag that can be hermetically sealed when transporting and storing vegetation material, and 2) the vegetation material is easily exposed by spraying water after laying on the ground surface. 3) The vegetation material after laying can be prevented from scattering, collapsing and flowing out due to wind and rain.4) After the vegetation is completed, it is completely biodegraded by soil microorganisms.
5) It can be manufactured at low cost with simple construction,
It is an object of the present invention to provide a biodegradable composite sheet, a bag using the composite sheet, and a vegetation material storage bag.

[0011]

Means for Solving the Problems The present inventors have made intensive studies to achieve the above object, and as a result, have reached the present invention. That is, the present invention provides (Constitution 1) a composite sheet in which laminated portions and non-laminated portions of a biodegradable resin are alternately provided on the surface of a water-soluble or water-dispersible substrate. The lamination portion is provided in a belt shape parallel to the base material feeding direction at the time of lamination processing, and the entire area of the lamination portion is 50% of the surface of the base material.
% Or more, a biodegradable composite sheet,
(Structure 2) The biodegradable composite sheet according to Structure 1 is characterized in that the strip-shaped biodegradable resin laminated portions are connected by a linear or strip-shaped biodegradable resin to form a net-shaped laminated portion. (Constitution 3) On the back surface of the biodegradable composite sheet according to the constitution 1, the linear or band-like biodegradability is within a range that traverses all the band-like biodegradable resin laminated portions on the front surface. A biodegradable composite sheet characterized by having a resin laminated portion formed thereon, (Structure 4) a biodegradable composite sheet of Structures 1 to 3 provided with a strip-shaped biodegradable resin laminated portion on the surface. The bag which is heat-sealed with its surface inside and joined by the biodegradable resin of the laminated portion, (Structure 5) Structure 4
The present invention relates to a vegetation material storage bag, characterized in that various vegetation materials are sealed in the bag.

[0012] The present invention relates to a composite sheet in which a non-laminated portion of the composite sheet is washed away when a large amount of water is used because a water-soluble or water-dispersible base material is used, and an aperture is formed in the entire sheet. Also, a bag made using the composite sheet of the present invention is such that a large amount of water causes a part of the bag to be washed away, and an opening portion can be almost uniformly formed in the entire bag, and is left as it is. Applications, such as seeds, cultivation soil, fertilizer, soil improvement materials, materials for bags that store vegetation materials such as water retention materials, and vegetation material storage bags made using the materials, or fishing komase bags, etc. In the case of the former vegetation material storage bag, transportation,
It functions as a storage bag during storage and has a function to prevent vegetation material from scattering and collapsing after laying, and it can be decomposed by microorganisms and does not need to be collected manually after vegetation is completed. In addition, as a fishing bag for dry bait made using the latter composite sheet of the present invention, even after the water-soluble or water-dispersible base material is dissolved in the sea, the resin laminated portion substitutes for a sowing bait basket. Therefore, the komase bag of the present invention can be hooked directly on a fishing line without the need for a basket, and can be made into a heat-sealed bag.

In these, a laminated portion of a biodegradable resin is provided on the surface of a water-soluble or water-dispersible base material in a belt shape parallel to the feeding direction of the base material at the time of laminating, so that water-soluble or water-dispersible base material is sprayed. A composite sheet I (constitution 1), in which the dispersible base material is dispersed and dissolved to form a biodegradable resin strip, and a strip-shaped lamination portion parallel to the feeding direction (hereinafter referred to as “flow direction lamination”). Portion), a linear or band-like laminated portion of biodegradable resin (hereinafter referred to as a “width direction laminated portion”) is formed over the entire area crossing the flow direction laminated portion, and the flow direction laminated portion is formed. The composite sheet II is characterized in that a network of biodegradable resin is formed after the water-soluble or water-dispersible base material is dispersed and dissolved by water spraying because the parts are connected.
(Structure 2) and a composite sheet III (Structure 3) characterized in that a flow direction laminated portion and a width direction laminated portion of the biodegradable resin are provided on the front and back surfaces of the base material, respectively. A bag IV (Configuration 4) manufactured from a combination of the same or different configurations of the composite sheets of Configurations 1 to 3;
The present invention relates to a vegetation material storage bag V (constitution 5) that is used by laying various vegetation materials in a flower bed, a golf course, a slope, and the like with an IV. The terms “strip” and “linear” used in the present invention are defined as a strip having a width of 1 mm or more and a line having a width of less than 1 mm.

FIG. 1 is a perspective view of the composite sheet I.
FIG. 2 shows a perspective view of the composite sheet II. FIG. 3 is a cross-sectional view of the place where the composite sheet I is overlapped during the heat sealing of the bag IV composed of the composite sheet. FIG. 4 is a perspective view of the bag IV, and FIG. 5 is a cross-sectional view of the heat sealing portion of the bag IV in FIG. FIG. 6 shows a partially cutaway perspective view of the bag IV composed of the composite sheet II.

The water-soluble or water-dispersible base material in the present invention includes paper and nonwoven fabric obtained by forming water-soluble or water-dispersible fiber into a sheet by wet or dry method, water-soluble polymer film, and paper or nonwoven fabric. A laminate of water-soluble polymer films, each of which has biodegradability that can be degraded by soil microorganisms. Examples of the water-soluble or water-dispersible fibers include wood pulp fibers such as softwood pulp, and non-wood pulp fibers such as manila hemp pulp, sisal pulp, flax pulp, and kenaf pulp, fibrous carboxymethyl cellulose salts, and fibrous fibers. Examples include fibrous derivative fibers such as carboxyethylcellulose salts, regenerated or purified cellulose fibers such as rayon fibers and lyocell fibers, and water-soluble synthetic fibers such as polyvinyl alcohol fibers and polyethylene oxide fibers. Examples of the water-soluble polymer film include a polyvinyl alcohol film, a polyethylene oxide film, and a pullulan film. As a laminate of a sheet-like material made of water-soluble or water-dispersible fiber and a water-soluble polymer film, laminated paper obtained by melt-extruding and laminating polyvinyl alcohol on a water-soluble paper made of a fibrous carboxymethyl cellulose salt,
Laminated paper in which a polyethylene oxide film is bonded to a water-dispersible paper made of wood pulp with a polyvinyl alcohol-based adhesive is used.

The biodegradable resin in the present invention has thermoplasticity and thermoadhesive properties and is not limited in its melting point.
It has a temperature difference of 50 ° C or more between the melting point and the thermal decomposition point, and has a melt viscosity of 5,000 in the temperature range between the melting point and the thermal decomposition point.
It should be ~ 5,000,000 cps, preferably 10,000-30,000 cps. If the melt viscosity exceeds 5,000,000 cps, the biodegradable resin melted by the melt coating device cannot be fed under pressure, and it becomes difficult to laminate the biodegradable resin on a water-soluble or water-dispersible base material in a belt shape. Specific examples of biodegradable resins include aliphatic polyesters such as polybutylene succinate, polybutylene adipate, polybutylene adipate succinate, oxycarboxylic acids such as polylactic acid, and poly (ε-caprolactone), and polyesters of lactones, poly -3-
Hydroxyvalerate, poly-3-hydroxybutyrate,
And poly-γ-hydroxyalkanoates such as poly-3-hydroxycaprolate.

A method of forming a laminated portion in the flow direction of a biodegradable resin on the surface of a water-soluble or water-dispersible base material includes a slit opening having a slit interval of 1 to 200 μm and a slit width of 1 to 100 mm;
From the T-die for extruding molten resin, which is alternately provided with non-opening portions having a width of 1 to 100 mm, biodegradation is performed so that the laminated portions and non-laminated portions of the biodegradable resin are alternately provided over the width direction. Extrusion of the resin melt is applied to the substrate surface. In this case, it is preferable to make the width of the laminated portion equal to or larger than that of the non-laminated portion in order to secure the sealing property of the heat seal portion. In addition, as the optimum resin coating amount of the flow direction laminated portion, 10 to 200 μm, more preferably 40 to
The range is 100 μm. The most suitable coating equipment for this method is the one that has been used to apply hot melt resin.It is a heating and melting tank for resin, a gear pump or plunger pump or screw pump for feeding molten resin, and for extruding molten resin. It is composed of a T-die and a comb-shaped shim plate sandwiched between slits for extruding the resin of the T-die in order to alternately provide a portion from which the molten resin is extruded and a portion from which the molten resin is not extruded.

In order to connect the flow direction laminated portion of the biodegradable resin laminated on the surface of the water-soluble or water dispersible substrate to another flow direction laminated portion and the width direction laminated portion of the biodegradable resin, From the molten resin extrusion nozzle provided with an opening with a diameter of 0.1 to 3 mm, slide the nozzle to the left and right to further spread the width direction biodegradable resin Extrusion and fusion are performed.

Further, instead of sliding the molten fat extruding nozzle to the left and right, the molten resin discharged from the nozzle is stretched in a thread shape by applying a high-temperature, high-speed air flow to apply spiral rotation, and to extend downward without contacting the nozzle. The flow of the biodegradable resin laminated on the surface of the water-soluble or water-dispersible substrate by applying the resin of the width direction laminated portion on the placed flow direction laminated substrate in a spiral pattern with a width of 8 to 100 mm. The direction stacking portion may be connected to an adjacent flow direction stacking portion. Spiral spray gun system (Nordson, CF2)
00HAM) and spiral spray application system (Co., Ltd.)
Suntool).

The composite sheets I, II and III thus obtained are laminated by laminating the resin layers in the flow direction of the composite sheets, and heat-sealed at their ends to form a bag IV. Can be. Two composite sheets as bag IV configuration
Heat-sealed bags of I or II, and composite sheets
One using I and II on each side. Although the bag IV depends on its shape, for example, in the case of a four-sided seal, if the water-soluble or water-dispersible base material is dispersed and dissolved by watering, the four sides are heat-sealed by the biodegradable resin, Since the shape of the four sides of the original bag is retained, the use of the composite sheet I results in a bag having a large opening which is no longer a bag, and the use of the composite sheet II results in a small opening. It becomes a net-like bag. In order to form a four-sided seal portion, the resin-laminated surface of the composite sheet is set to the third position.
They must face each other as shown in the figure, and must be overlapped and heat-sealed so that one of the strip-shaped resins can fill the non-laminated portion facing the other. On the other hand, in order for the resin laminated portion to fill up the facing non-laminated portion, the width of the flow direction laminated portion must be equal to or larger than the width of the non-laminated portion.

When the bag IV manufactured from the composite sheet I, II or III according to the present invention is used as a vegetation material storage bag V, 1) it can be used as a packaging bag which can be sealed when the vegetation material is transported and stored. 3) After laying on the ground surface, vegetation material can be easily exposed by watering and vegetation can be applied easily.
The vegetation material after laying can be prevented from scattering, collapsing and flowing out due to wind and rain.4) After the vegetation is completed, it is completely biodegraded by soil microorganisms, eliminating the need for manual collection work. Because it is simple and can be manufactured at low cost, it can be used very effectively.

The vegetation material storage bag V according to the present invention uses a heat-sealed bag IV, a plant seed 5a and a fertilizer 5.
b, clay mineral 5c, water retention material 5d, organic soil conditioner 5
e) and filled with various vegetation materials and sealed with a heat seal.

In the vegetation material storage bag V, as shown in FIG. 7, the slope of the slope of the biodegradable resin laminated on the composite sheet I, II, or III in the flow direction is such that the direction of the band of the laminated portion is the slope. 6
Lay it up and down. Since the slope 6 has a predetermined inclination angle, anchors 7 are driven into the slope 6 at predetermined intervals in order to prevent the vegetation material storage bag V from slipping down. The vegetation material storage bag V thus laid is formed by dispersing and dissolving the water-soluble or water-dispersible base material 1 due to artificial watering or rainfall, exposing the biodegradable resin laminate portion, and forming a resin band-like bag or net-like shape. Are formed. A part of the vegetation material flows out of the storage bag V as the water-soluble or water-dispersible substrate 1 disperses and dissolves, but most of the vegetation material stays inside the storage bag V and eventually the storage bag V becomes the center. The seeds germinate, and vegetation starts with the germination of the seeds that have flowed out to the periphery. Since the storage bag V has changed into a bag shape composed of only the biodegradable resin laminated portion by watering, the germinated seed buds 8 and roots 9 grow through the opening of the bag, and the root 9 It can easily extend into the ground and take root. Thus, the vegetation is completed, including the storage bag V, and the surrounding area, and the biodegradable resin undergoes biodegradation in six months to one year after laying, so there is no unnecessary matter other than plants. Vegetation is completed.

The amount of vegetation material flowing out of the storage bag V due to watering depends on the width of the laminated portion in the flow direction of the biodegradable resin, the width of the non-laminated portion in the form of a band, and the mesh formed by the laminated portion of the biodegradable resin in the width direction. It can be adjusted by the presence or absence of formation. When the slope angle of the slope 6 is steep, the width of the laminated portion in the flow direction of the biodegradable resin is increased and the width of the non-laminated portion is reduced to suppress excessive outflow of the vegetation material. The one that does not become too large is appropriate. Further, in the case of coping with heavy rainfall, it is preferable that the lamination in the width direction of the biodegradable resin connects the laminations in the flow direction of the biodegradable resin to form a net shape, and a net-like bag is formed after watering.

The method of laying the storage bag V on the slope or the like is as follows. In addition to the method of arranging the storage bag V on the ground surface and fixing with an anchor as described above, the storage bag V is mounted on a net-like body and placed on the ground surface with the net. ,
There is a method of fixing with an anchor or the like. According to this method,
There is an advantage that the storage bag V can be easily laid on the slope.
The reticulated body for mounting the vegetation material storage bag V according to the present invention includes two reticulated bodies manufactured by intersecting the warp and the weft at predetermined intervals and knitting, or joining the entangled portions of the warp and the weft by heat fusion. And a method of providing storage sections for storage bags V at intervals of 3 to 50 cm.

The yarn used for the vegetation net is a non-biodegradable synthetic fiber such as polyethylene, polypropylene, nylon and polyester; an aliphatic polyester such as polybutylene succinate, polybutylene adipate and polybutylene adipate succinate. Biodegradable synthetic fibers made from biodegradable resins such as oxycarboxylic acids such as polylactic acid and poly (ε-caprolactone) and polyesters of lactones, and plant fibers such as cotton, sisal hemp, and manila hemp. Threads using biodegradable synthetic fibers or plant fibers are preferred from the viewpoint of biodegradability.

[0027]

BEST MODE FOR CARRYING OUT THE INVENTION A composite sheet I in which a laminated portion and a non-laminated portion are alternately provided on the surface of a water-soluble or water-dispersible substrate according to the present invention, or a flow of the composite sheet I When using a composite sheet II in which the direction laminations are connected by a width direction lamination portion of the biodegradable resin, or a composite sheet III in which a flow direction lamination portion and a width direction lamination portion are provided on the front and back of the substrate, respectively. The bag can be easily made by heat sealing, and the water-soluble or water-dispersible base material is dispersed and dissolved by water sprinkling to change into a bag with a band-shaped opening or a net-shaped bag. In this way, it is possible to manufacture a bag that can be used as a suitable packaging bag and that has an opening through which the contents can be brought into direct contact with the outside by watering after laying.

The vegetation material storage bag using the composite sheet I, II or III according to the present invention can be used as a packaging bag when transporting and storing the vegetation material. Because the vegetation material is easily exposed, vegetation can be applied easily, and the vegetation material after laying can be prevented from scattering, collapsing, and flowing out due to the wind and rain.After the vegetation is completed, it is completely biodegraded by soil microorganisms. This eliminates the need for manual collection work, and is simple in configuration and low in manufacturing cost.

[0029]

The present invention will now be described by way of examples, which should not be construed as limiting the invention.

Example 1 Polycaprolactone as a biodegradable resin (trade name: Placcel H4, weight average molecular weight: 40,000)
Melting point: 60 ° C, Daicel Chemical Industries, Ltd.) placed in a hot melt applicator (Made by Nordson, MX4460)
Melted at ° C., hot melt coating head which is heated to 200 ° C. (Bruno - Doson Co. Meltex ^TM BC31
Water feeding from the mold) extrusion coating a strip on the (trade name Dizorubo, basis weight 30 g / m ^2, Mishima Paper Co., Ltd.), alternately and non-laminated portion of the strip-shaped laminate portion and width 3mm width 4mm The placed composite sheet I was produced. The resin coating thickness at this time is 45.3μm
Met. The composite sheet I was placed on soil in the form of a 250 mm square sheet, and as a result of sprinkling 1000 ml of water with rainfall, the water-soluble paper as the base material was dispersed and flowed within 10 seconds, and the polycaprolactone laminated portion became a belt-like film This state is referred to as a “band-like film”) on the soil surface at regular intervals.

(Example 2) Using the composite sheet I of Example 1, two sheets having a length of 250 mm in the flow direction and a length of 151 mm in the width direction were prepared, the lamination surfaces were overlapped, and three sides were overlapped. A bag IV was prepared by heat sealing. At this time, the two composite sheets I were overlapped as shown in FIG. 3 with a shift of about 3 mm in the width direction so that one of the band-shaped laminated portions facing each other could fill the other non-laminated portion. JIS Z1
As a result of measurement according to 514, 970 g / 15 mm had a sufficient bonding strength, and the composite sheet I was suitable as a heat-sealing bag material. The opening of Bag IV is sealed by heat sealing and placed on the soil, and 1000ml of water is sprinkled with rainwater.As a result, the water-soluble paper, which is the base material, disperses and runs off within 10 seconds, and the polycaprolactone band-like film forms a bag. And remained on the soil surface.

(Example 2 ') Using the composite sheet I of Example 1, using a sheet measuring 250 mm x 302 mm in the length in the flow direction x width in the width direction, and turning the laminated surface inward near the center in the width direction, In the same manner as in Example 2, the bag IV was prepared by heat-sealing three sides so that one facing band-like laminated portion could fill the non-laminated portion on the other surface. This bag IV had the same properties as Example 2.

(Example 3) White clover seeds and 110 g of an organic soil improver (Kinosoyl, manufactured by Honshu Ryokuzai Co., Ltd.) were put in the bag IV of Example 2 and sealed with heat sealing to store vegetation material. Bag V was prepared. This storage bag
V had sufficient strength to withstand handling during transportation without leakage. Next, the storage bag V was placed on the surface of the slope with a 45 ° inclination angle. At this time, the composite sheet constituting the storage bag V
The lamination part in the flow direction of I was made parallel to the vertical direction of the sloped land. As a result of spraying 1000 ml of water into this storage bag V with rain and rain, the water-soluble paper, which is the base material, disperses and runs off within 10 seconds, and the polycaprolactone band-shaped film remains on the ground in a form surrounding the vegetation material. It was observed that the runoff was suppressed by the band-shaped film. About one month after the storage bag V was laid, the leaves of the white clover grew from the openings between the strip films to form vegetation. About six months later, the roots of the white clover grew underground on the slope through the openings between the strips,
It seemed that it was rooted on the slope. At the same time, the strength of the strip-shaped resin laminate was greatly reduced, and the strip was easily broken. Some of the strips were broken into pieces by the wind and rain, and it was clear that the form had collapsed due to biodegradation.

Example 4 30 parts by weight of two kinds of biodegradable polycaprolactones (trade name: Praxel H5, weight average molecular weight: 50,000, melting point: 60 ° C., manufactured by Daicel Chemical Industries, Ltd.) and (trade name: Praxel H1P, weight average molecular weight 100
00, melting point 60 ° C., 70 parts by weight of Daicel Chemical Industries, Ltd.) and hot melt applicator (Nordson Co., Ltd.)
5 Spiral spray guns (Nodson Co., Ltd.)
Extruded from the nozzle (nozzle diameter: 0.2 mmφ) in the form of continuous yarn, and applied on the resin lamination surface of the composite sheet I of Example 1 so as to draw a spiral with a width of 60 mm. To form a composite sheet II in which five spiral bands are stacked. This composite sheet II
Put it on a sheet of 0mm square and put it on the soil.
As a result of spraying l, the water-soluble paper as a base material dispersed and flowed off within 10 seconds, and a net-like material in which the belt-like film was connected by continuous threads of polycaprolactone remained on the soil surface.

Example 5 A bag IV was prepared in the same manner as in Example 2 using the composite sheet II of Example 4. The heat seal strength of this bag IV was 1140 g / 15 mm, which was a sufficient bonding strength, and the composite sheet II was suitable as a heat seal bag material. The opening of the bag IV is sealed by heat sealing and placed on the soil, and as a result of spraying 1000 ml of water with rainfall, the water-soluble paper as the base material disperses and runs off within 10 seconds, and the band film is made of continuous polycaprolactone thread. Connected mesh bags remained on the soil surface.

(Example 6) A vegetation material storage bag V was prepared in the same manner as in Example 3 using the bag IV of Example 5. This storage bag
V had sufficient strength to withstand handling during transportation without leakage. The storage bag V was laid on the slope in the same manner as in Example 3, and 1000 ml of water was sprinkled with rain water. As a result, the water-soluble paper as a base material dispersed and flowed within 10 seconds, and the band-like film was connected with a continuous thread of polycaprolactone. It was observed that the net-like bags that were wrapped around the vegetation material remained on the surface of the ground, and that the drainage of the vegetation material due to watering was suppressed by the net structure. Furthermore, as a result of spraying 3000 ml of water with rainfall dew, it was clear that the effect of the net structure to prevent the vegetation material from flowing out was greater than that of Example 3, and the net structure effectively prevented the outflow of the vegetation material.

For this reason, the vegetation material storage bag according to Embodiment 6
V can be laid on a slope that is steeper than that of the third embodiment. About one month after the storage bag V was laid, the leaves of the white clover grew from the openings of the mesh structure to form vegetation. About six months later, it was observed that the roots of the white clover grew underground on the slope through the openings in the net-like structure, and were rooted on the slope. At the same time, the network structure of the biodegradable resin is easily broken due to a drastic decrease in strength, and some of the network structure is broken into pieces due to wind and rain, and it is clear that the form has collapsed due to biodegradation. Was.

Example 7 20 parts by weight of a biodegradable resin polybutylene succinate (trade name: Bionore # 1030, melting point: 114 ° C., manufactured by Showa Polymer Co., Ltd.) and polycaprolactone (trade name: Praxel H1P, weight average) Molecular weight 10000, melting point 60 ° C,
A mixture consisting of 80 parts by weight of Daicel Chemical Industry Co., Ltd.) was used as a hot melt applicator (MX4460 manufactured by Nordson Co., Ltd.).
Water-dispersible dry pulp non-woven fabric (trade name: Water-soluble Jsoft) from a hot melt coating head (Meltex ^TM BC31 type manufactured by Nordson Co., Ltd.) that is melted at 200 ° C and heated to 200 ° C. , Basis weight 40g / m ² , Havix Corporation
In the same manner as in Example 1, to produce a composite sheet I in which flow-direction resin laminated portions having a width of 4 mm and non-laminated portions having a width of 3 mm were alternately arranged. The resin coating thickness at this time is
It was 45.3 μm. The composite sheet I was placed on soil in the form of a 250 mm square sheet, and as a result of sprinkling 1000 ml of water with rainfall,
The water-dispersible dry pulp nonwoven fabric as a base material dispersedly flowed off within 20 seconds, and strip films of the biodegradable resin mixture remained on the soil surface at regular intervals.

Example 8 A bag IV was produced in the same manner as in Example 2 using the composite sheet I of Example 7. The heat sealing strength of this bag IV is 430g / 15mm and has sufficient bonding strength.
This composite sheet I was suitable as a heat-sealing bag material. The opening of the bag IV is sealed by heat sealing and placed on the soil, and 1000ml of water is sprinkled with rain water.As a result, the water-dispersible dry pulp nonwoven fabric, which is the base material, disperses and runs off within 20 seconds. Was formed into a bag and remained on the soil surface.

Example 9 A vegetation material storage bag V was prepared in the same manner as in Example 3 using the bag IV of Example 8. This storage bag
V had sufficient strength to withstand handling during transportation without leakage. As in Example 3, the storage bag V was laid on the slope, and 1000 ml of water was sprinkled with dew rain. As a result, the water-dispersible dry pulp nonwoven fabric as a base material dispersedly flowed off within 20 seconds, and the biodegradable resin mixture was removed. The band-shaped film remained on the ground in the form of a bag and wrapped around the vegetation material, and it was observed that the runoff of the vegetation material due to watering was suppressed by the band-shaped film. About one month after the storage bag V was laid, the leaves of the white clover grew from the openings between the strip films to form vegetation. Approximately six months later, the roots of the white clover grew under the slope through the openings between the films and appeared to be rooted on the slope. At the same time, it was clear that the strip film had a drastically reduced strength and was easily broken into pieces, and some were broken into pieces due to the wind and rain, and the form was collapsed by biodegradation.

[0041]

As described above, the composite sheet I in which the band-like laminated portion and the non-laminated portion of the biodegradable resin are alternately provided on the surface of the water-soluble or water-dispersible substrate according to the present invention, or A flow-direction lamination portion and a width-direction lamination portion are provided on the front and back of the composite sheet II or the base material, respectively, in which the strip-shaped lamination portions laminated on the composite sheet I are connected by the width-direction lamination portion of the biodegradable resin. The composite sheet III can be easily formed into a bag by heat sealing and joining the biodegradable resin laminated portions. Further, since the water-soluble or water-dispersible base material is dispersed and dissolved by spraying water to form a web, or a web in which the web-like laminated portion is connected by a linear or web biodegradable resin, the composite sheet I, The bag obtained from II or III can be used as a packaging bag that can be sealed and packed while the contents are being transported and stored, and after laying, an opening is formed to allow the contents to come into direct contact with the outside by watering. You.

Accordingly, the vegetation material storage bag using the composite sheet I, II or III according to the present invention can be used as a packaging bag for sealing the vegetation material when the vegetation material is transported and stored. In addition, when laying on the ground surface, the water-soluble or water-dispersible base material is dispersed and dissolved by watering to form an opening where the vegetation material can directly contact the outside, so that germination of plant seeds, Vegetation can be easily applied without the storage bag hindering growth. Furthermore, even after laying and watering, the biodegradable resin band-like film or net remains wrapping the vegetation material, so that the vegetation material can be prevented from scattering, collapsing, or flowing out due to wind and rain. By the time the vegetation is completed, the biodegradable resin band film or mesh undergoes biodegradation or biodegradation by soil microorganisms, and is dissipated and disappears, which has the effect of eliminating the need for manual collection work. .

The vegetation material storage bag according to the present invention is manufactured by continuously producing a composite sheet I, II or III by a strip or linear extrusion coating method of a biodegradable resin, and using an automatic filling bag making machine to form the bag and fill the vegetation material. Can be manufactured at high speed and at low cost as compared with the conventional vegetation material storage bag.

[Brief description of the drawings]

FIG. 1 is a perspective view of a composite sheet I of the present invention.

FIG. 2 is a perspective view of a composite sheet II of the present invention.

[FIG. 3] When two sheets of the composite sheet I of the present invention are used to form a heat-sealed bag, the biodegradable resin laminated surface faces each other.
FIG. 9 is a cross-sectional view illustrating a method of superimposing such that one laminated portion can fill the other non-laminated portion.

FIG. 4 is a perspective view of a bag IV produced by using two composite sheets I of the present invention and heat-sealing three sides of the biodegradable resin laminated surfaces together and joining them.

FIG. 5 is a cross-sectional view of the heat seal portion of the bag IV in FIG.

FIG. 6 is a partially cutaway perspective view of a bag IV manufactured by using two composite sheets II of the present invention and heat-sealing three sides of the biodegradable resin laminated surfaces together and joining them.

FIG. 7 is a schematic cross-sectional view showing a state in which a vegetation material storage bag V is laid on a slope and plant seeds have germinated and rooted.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 Water-soluble or water-dispersible base material 2 Strip-shaped biodegradable resin laminated part 3 Heat seal part 4 Linear biodegradable resin part fused to the base material in a spiral pattern 5 Vegetation material (5a Plant seed , 5b fertilizer, 5c clay mineral,
5d Water retention material, 5e Organic soil improvement material) 6 Slope 7 Anchor 8 Plant bud 9 Plant root

──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. ⁷ Identification symbol FI Theme coat ゛ (Reference) B32B 27/08 B32B 27/08 4F100 29/00 29/00 B65D 30/02 B65D 30/02 D21H 13/00 D21H 13/00 F-term (reference) 2B022 AA05 BA01 BA02 BA12 BA13 BA14 BA21 BA23 BA25 BB05 DA19 2B051 AC02 BA04 BA06 CB11 CB28 CB29 CB35 2B052 CA06 CA14 CA16 EA04 3E064 AA05 BA01 BA12 BA22 BA40 BA60 FB09 BC12 BC20 AD01 BA04 BA15 BA29 BB51 BB72 BB75 CA40 4F100 AJ04 AJ06 AK01B AK01C AK21 AK41 AK54 AR00A BA02 BA03 BA07 BA10A BA10B BA10C BA13 DA01 DC16B DC21C DC22B DC22C DG10 GB01 GB16 JB09A JC00B JC00Y

Claims (5)

[Claims] 1. A composite sheet in which laminated portions and non-laminated portions of a biodegradable resin are alternately provided on the surface of a water-soluble or water-dispersible base material, wherein the laminated portion of the biodegradable resin is laminated. It is provided in a belt shape parallel to the base material feeding direction during processing,
A biodegradable composite sheet, wherein the entire area of the laminated portion is 50% or more of the surface of the substrate. 2. The method according to claim 1, wherein the biodegradable composite sheet is formed by connecting the strip-shaped biodegradable resin laminated portions with a linear or strip biodegradable resin to form a net-shaped laminated portion. Characteristic biodegradable composite sheet. 3. A linear or belt-shaped biodegradable resin laminated portion is formed on the back surface of the biodegradable composite sheet according to claim 1 in a range crossing all of the band-shaped biodegradable resin laminated portions on the front surface. A biodegradable composite sheet, characterized in that: 4. The biodegradable resin sheet according to claim 1, wherein the biodegradable resin sheet is heat-sealed using the biodegradable composite sheet according to claim 1 with the surface on which the strip-shaped biodegradable resin laminate section is provided. Bags that are joined together by 5. A vegetation material storage bag, wherein various vegetation materials are enclosed in the bag of claim 4.