CA2152951A1 - Rubber product for weeding and method of manufacturing same - Google Patents
Rubber product for weeding and method of manufacturing sameInfo
- Publication number
- CA2152951A1 CA2152951A1 CA 2152951 CA2152951A CA2152951A1 CA 2152951 A1 CA2152951 A1 CA 2152951A1 CA 2152951 CA2152951 CA 2152951 CA 2152951 A CA2152951 A CA 2152951A CA 2152951 A1 CA2152951 A1 CA 2152951A1
- Authority
- CA
- Canada
- Prior art keywords
- rubber
- weeding
- weed killer
- rubber member
- water
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Abandoned
Links
Classifications
-
- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01G—HORTICULTURE; CULTIVATION OF VEGETABLES, FLOWERS, RICE, FRUIT, VINES, HOPS OR SEAWEED; FORESTRY; WATERING
- A01G13/00—Protecting plants
- A01G13/02—Protective coverings for plants; Coverings for the ground; Devices for laying-out or removing coverings
- A01G13/0256—Ground coverings
- A01G13/0268—Mats or sheets, e.g. nets or fabrics
Landscapes
- Health & Medical Sciences (AREA)
- General Health & Medical Sciences (AREA)
- Toxicology (AREA)
- Life Sciences & Earth Sciences (AREA)
- Environmental Sciences (AREA)
- Catching Or Destruction (AREA)
- Compositions Of Macromolecular Compounds (AREA)
Abstract
A rubber product for weeding, which retains a weeding effect over a long time and is simple in construction. It is made by forming a plurality of through holes (12), capable of admitting therethrough rainwater and sunlight, in a rubber member (10) having a predetermined shape and having a water soluble herbicide blended therein.
Description
SPECIFICATION
TITLE OF THE INVENTION
WEEDING RUBBER AND A METHOD OF MANUFACTURING THE SAME
FIELD OF TECHNOLOGY
The present invention relates to weeding rubber and a method of manufacturing the weeding rubber, more precisely relates to weeding rubber, which has a slow weeding effect, and a method of manufacturing the same.
BACKGROUN~ TECHNOLOGY
Vines sometimes climb up pylons for electric power lines and make troubles, e.g., short circuit. Weeds, which grow in shoulders of roads or rail roads, sometimes hide traffic signs or signals and cause accidents.
Conventionally, vines climbing pylons and weeds growing in shoulders of roads or rail roads have been manually removed.
However, since pylons are usually located in places difficult of access, e.g., deep in mountains, and a large number of traffic signs and signals exist, to manually remove vines and weeds has disadvantage of high cost and taking a long time.
To solve said disadvantage, a weeding mat was disclosed in Japanese Utility Model Publication Gazette No. 3-23102, the weeding mat has: a rubber mat member having a prop-hole into which a prop of a traffic sign can be inserted and a clasp-hole into which a clasp can be inserted; and a weeding film made of a water-soluble plastic in which a weed killer is included, the weeding film is provided on a bottom face of the rubber mat member.
By using the conventional weeding mat, when the sunlight heats an upper face of the mat and the ground surface under the mat is heated, water in the ground contacts the bottom face of the mat and the weed killer gradually comes out therefrom and permiates into the ground, so that the weed killer kills weeds and makes atmosphere under the mat stuffy so as to stop the growth of weeds.
In the conventional weeding mat, however, since the weed killer is included in the weeding film only, the amount of the weed killer is small, so that the period of weeding effect must be short when much water is evaporated from the ground.
In case of using the conventional weeding mat, a whole surface of a weeding area must be covered with the mat or the mats, which have the weeding films on the bottom faces, so that the weeding cost must be quite high if the weeding area is large. Thus, the conventional weeding mat has been used for weeding in a small area such as in the vicinity of a prop of a traffic sign.
An object of the present invention is to provide weeding rubber, which has a simple structure and which is capable of having a long period of weeding effect and weeding a large area, and a method of manufacturing said weeding rubber.
l:)ISCLOSURE OF THE INVENTION
To achieve the object, inventors of the present invention have studied about the best season of weeding with weed killers and the best means for gradually introducing out weed killers, then they found out that the best season is the time when weeds' seeds germinate, and that the weed killers are capable of gradually coming out from rubber members when they are dipped in the water.
Further, they found out that the weeding effect can be accelerated by forming through-holes through which rain water and the sunlight are capable of passing in the rubber member in which the weed killer is included.
The inventors have invented the present invention on the basis of above described facts.
Namely, the weeding rubber of the present invention comprises: a rubber member being formed into a prescribed shape, the rubber member including a water-soluble weed killer; and a plurality of through-holes through which water and light are capable of passing.
And the method of manufacturing the weeding rubber comprises the steps of: kneading a rubber-material in which a vulcanizing agent and a water-soluble weed killer have been added; forming the rubber-material into a rubber member having a prescribed shape; vulcanizing the rubber member; and forming a plurality of through-holes through which water and light are capable of passing in the rubber member.
In the present invention, by employing the water-soluble weed killer, which is capable of killing weeds germinating in the ground, the weeding effect can be increased.
To uniformly scatter the weed killer in the rubber member and accelerate the elution thereof, the weed killer is preferably formed into grains having diameter of 0.8 ~m - 1 mm; and to increase forming ability of the rubber member, the weight of the weed killer is preferably 10 - 90 WT% of the rubber member.
Further, if porous grains in which the water-soluble weed killer has been previously impregnated are added in the rubber member, a large amount of the weed killer can be included therein. In this case, vegetable porous grains such as sawdust and buffs are preferable.
Weeding in a large area can be executed if the rubber member is formed into a plate; the weeding rubber can be attached to legs of the pylons if the rubber member is formed into a cylindrical shape.
In the weeding rubber of the present invention, the sunlight and rain water can reach the ground through the through-holes, so that the germination of seeds of weeds can be accelerated. While the weeds germinate, the weed killer, which comes out from the rubber member and dissolves in the rain water, exists in the ground with high density, so that the weeds germinating in the ground can be killed easily.
And in the present invention, since the weed killer is directly mixed with the rubber member, a large amount of the weed killer can be included therein, so that the period of weeding effect can be longer. Moreover, the weeding rubber is not required to have a complex structure, the structure thereof can be simpler.
Further, since there are formed a plurality of the through-holes through which the sunlight and rain water are capable of passing, a large weeding area can be covered easily.
Note that, the detail theory that the weed killer comes out from the weeding rubber is not clearly known now, but the inventors think that the weed killer is introduced out from the rubber member via very fine holes or paths in the rubber.
Existence of said fine holes or paths is presumed by the fact that inner pressure of a flask, which has been reduced below the air pressure, with a rubber plug, which closes a mouth of the flask, is gradually reach the air pressure.
BRIEF DESCRIPTION OF THE DRAWIN~S
Fig. 1 is a perspective view showing an embodiment of the weeding rubber of the present invention; Fig. 2 is a sectional view showing the weeding rubber shown in Fig. 1, which is set on the ground; and Fig. 3 is a graph showing the change of the weight of the rubber member, which includes the weed killer and which is dipped in the water, with the lapse of time.
THE BEST MODE OF THE INVENTION
In the present invention, it is necessary that a water-soluble weed killer is included in a rubber formed into a prescribed shape.
If rubber moleculer chains are formed into a mutually bridged net structure by vulcanizing, not only natural rubber but also plastic rubber can be used for forming the rubber member.
The rubber member may be formed any shape, preferably a sheet form, a plate form, etc., if it is able to have a plurality of through-holes, which will be explained later.
Any water-soluble weed killers may be employed in the present invention, especially weed killers, which are capable of killing weeds germinating in the ground, is preferably employed. Concretely, simazine ~2-chloro-4,6-bis(ethylamino)-1,3,5-triazine), karubutilate (3-[3-(N-tert-butylcarbamoyloxy) phenyl]l,ldimethylurea), DPA-Na (sodium salt of 2,2-dichloropropionic acid), tetrapion (2,2,3,3-tetrafluoropropionic acid), etc. may be employed as the weed killer.
The weed killer may be formed into grains and impregnated in porous grains. Vegetable porous grains such as sawdust and buffs are preferably employed as said porous grains.
To uniformly scatter the weed killer in the rubber member and accelerate the elution thereof, the diameter of the weed killer grains is 0.~ m - 1 mm. If the diameter is less than 0.8 ~m, the weed killer can be more uniformly scattered but the elution speed must be slower so that enough weeding effect cannot gained. On the other hand, if the diameter is greater than 1 mm, the elution speed must be too fast so that the desired slow weeding effect and highly uniform scattering ability of the weed killer cannot gained.
The amount of the weed killer depends on the desired weeding effect but it is preferably 10 - 90 WT% (more preferably 20 - 40 WT%) of the rubber member. If the amount is less than 10 WT% thereof, the period of weeding effect must be shorter; if the amount is greater than 90 ~T%, the forming ability of the rubber member gets worse.
In the present invention, it is important for the rubber member, which has been formed into a prescribed shape and which has included the weed killer, to have a plurality of through-holes through which the sunlight and the rain water are capable of passing.
The rain water and the sunlight reaching the ground via the through-holes accelerate the germination of weeds' seeds;
the weed killer, which has been included in the rubber member dissolves into the rain water, which flows on the upper face of the rubber member, can exist in the ground, in which the the seeds germinating exist, with high density.
Further, the time when the seeds germinate is the most effective time of weeding, so the weeds germinating in the ground can be killed easily.
From an above described point of view, the conventional weeding mat disclosed in the Japanese Utility Model Publication Gazette No. 3-23102 substantially has no through-holes for passing the sunlight and the rain, so the weeds are not accelerated to germinate and they stay in the form of seeds, thus enough weeding effect cannot be gained.
In the weeding rubber of the present invention, if the sunlight and rain are able to pass, the shape and the size of the through-holes are not limited. Thus, the weeding rubber may be formed into, for example, a net.
The weeding rubber may be manufactured by kneading a rubber-material in which a vulcanizing agent and the granular water-soluble weed killer and forming the rubber-material into the rubber member having a prescribed shape.
In the present invention, specific kneading conditions are not required, so they can be made under usual kneading conditions of manufacturing rubber products.
And grains in which the water-soluble weed killer has been previously included may be added for the kneading step in stead of the granular weed killer. In this case, a large amount of the weed killer can be impregnated by employing porous grains. Vegetable porous grains, e.g., sawdust, buffs, are preferably employed as the porous grains.
The rubber-material, which has been manufactured by kneading with the vulcanizing agent and the water-soluble weed killer, is vulcanized after forming into the prescribed shape.
The rubber-material may be vulcanized under usual vulcanizing conditions. The vulcanization may be executed by heating while the rubber-material is formed into the rubber member having the prescribed shape by a press machine.
In the present invention, there are bored a plurality of through-holes through which the sunlight and rain water are capable of passing in the rubber member. The step of boring the through-hole in the rubber member having the prescribed shape may be executed not only before the vulcanization but also after the vulcanization.
In case of vulcanizing the rubber member having the through-holes, the vulcanization is executed without closing or filling the through-holes.
If the weeding rubber of the present invention is formed into a cylindrical shape, it can be used by covering over legs of pylons so as to prevent vines from climbing upward. In this case, to easily cover the legs, it is preferable for the rubber member to make a break line in the longitudinal direction. Further, if a snap fastener, for example, is provided in the vicinity of the break line, it is easier to open and close the break line.
In case of forming the rubber member into a plate, the weeding rubber can be preferably used for removing weeds in shoulders of roads or rail roads, in golf courses, etc..
In the present invention, the structure of the weeding rubber can be simple and the weeding effect can be continued for a long time, so that the weeding in a large area can be executed with low cost.
EMBODIMENTS
(First Embodiment~
To observe the gradual elution of the weed killer from the rubber member, the rubber member, which includes the weed killer, was dipped in water and its speed of reducing weight has been measured.
In this embodiment, the rubber member was manufactured by kneading ethylene-propylene-diene rubber (EPDM), a known vulcanizing agent, sawdust, buffs and a weed killer, then the rubber member is vulcanized under usual vulcanizing conditions and formed into a sample piece having prescribed size.
In this embodiment, the weed killer has been previously impregnated in the sawdust and the buffs, then they have kneaded with the EPDM compound.
MATERIALS
the EPDM compound300 g the buffs 100 g the sawdust 50 g the weed killer 50 g DPA-Na 20 g tetrapion 30 g SIZE OF THE SAMPLE PIECE
5 cm x 5 cm x 4 cm The sample piece was dipped in 150 ml of distilled water for a prescribed time, then it was dried in an atmosphere of 120 C and measured its own weight. The rate of losing weight of the sample piece or the amount of the elution of the weed killer is calculated as the weight difference between the weight of the sample piece before dipping and that measured after dipping.
In this embodiment, another sample piece, which did not include the weed killer but kneaded in the same manner, was prepared as a blank, and it was dipped in the water, dried and measured its own weight so as to know the rate of losing weight of the blank, then the rate of losing weight of the sample piece including the weed killer was corrected on the basis of that of the blank.
The results is shown in a graph of Fig. 1. As shown in Fig. 1, the rate of losing weight of the sample piece shows that the rate linearly changes from the start of dipping until 48 hours, namely the weed killer is gradually eluted.
Based on the linear change, it takes about 938 hours (about 39 days) to elute 10 % of the weed killer.
Note that, in this embodiment, the sample piece was dipped in the water, so it will take longer time to elute the weed killer from the sample piece by rain.
(Second Embodiment) In this embodiment, the rubber member was manufactured by 1 ~
kneading ethylene-propylene-diene rubber (EPDM), a known vulcanizing agent, and granular karbutilate (Trade Name:
Tandex) as a weed killer, their weight is shown in TABLE 1.
Kneading conditions are as well as usual conditions for the EPDM.
Successively, a rubber-material kneaded was formed into a plate and vulcanized under usual vulcanizing conditions, then a plurality of through-holes were bored therein.
As shown in Fig. 2, the rubber-material was formed into a square plate 10 having size of 30 cm x 30cm and 225 through-holes 12, 12,...who~e diameter was each 5 mm.
The plate 10 shown in Fig. 2 was located on the ground as shown in Fig. 3 from August 3, 1995 to September 6, 1995, and the degree of growing weeds, which grew up in the through-holes 12, was measured. The results are also shown in the TABLE 1.
AMOUNT OF THE
WEED KILLER (WT%) 0 20 40 DEGREE OF ~ROWING WEEDS
Note) The degree of growing weeds "LOW" indicates the number of the through-holes 12 in which weeds have grew 1 - 2.5 cm high from the upper face of the plate 10;
The degree of growing weeds "MEDIUM" indicates the number of the through-holes 12 in which weeds have grew 2.5 - 5 cm high from the upper face of the plate 10; and The degree of growing weeds "HI&H" indicates the number of the through-holes 12 in which weeds have grew 5 cm high or more from the upper face of the plate 10.
As shown in the TABLE 1, in case of the plate with no weed killer, since not only about one month in summer during which weeds grow the most but also the sunlight and rain reached the ground through the through-holes 12, weeds were capable of growing much in the through-holes 12. On the other hand, in case of the plate with the weed killer, the weeding effect was clearly observed with respect to the case of no weed killer.
TITLE OF THE INVENTION
WEEDING RUBBER AND A METHOD OF MANUFACTURING THE SAME
FIELD OF TECHNOLOGY
The present invention relates to weeding rubber and a method of manufacturing the weeding rubber, more precisely relates to weeding rubber, which has a slow weeding effect, and a method of manufacturing the same.
BACKGROUN~ TECHNOLOGY
Vines sometimes climb up pylons for electric power lines and make troubles, e.g., short circuit. Weeds, which grow in shoulders of roads or rail roads, sometimes hide traffic signs or signals and cause accidents.
Conventionally, vines climbing pylons and weeds growing in shoulders of roads or rail roads have been manually removed.
However, since pylons are usually located in places difficult of access, e.g., deep in mountains, and a large number of traffic signs and signals exist, to manually remove vines and weeds has disadvantage of high cost and taking a long time.
To solve said disadvantage, a weeding mat was disclosed in Japanese Utility Model Publication Gazette No. 3-23102, the weeding mat has: a rubber mat member having a prop-hole into which a prop of a traffic sign can be inserted and a clasp-hole into which a clasp can be inserted; and a weeding film made of a water-soluble plastic in which a weed killer is included, the weeding film is provided on a bottom face of the rubber mat member.
By using the conventional weeding mat, when the sunlight heats an upper face of the mat and the ground surface under the mat is heated, water in the ground contacts the bottom face of the mat and the weed killer gradually comes out therefrom and permiates into the ground, so that the weed killer kills weeds and makes atmosphere under the mat stuffy so as to stop the growth of weeds.
In the conventional weeding mat, however, since the weed killer is included in the weeding film only, the amount of the weed killer is small, so that the period of weeding effect must be short when much water is evaporated from the ground.
In case of using the conventional weeding mat, a whole surface of a weeding area must be covered with the mat or the mats, which have the weeding films on the bottom faces, so that the weeding cost must be quite high if the weeding area is large. Thus, the conventional weeding mat has been used for weeding in a small area such as in the vicinity of a prop of a traffic sign.
An object of the present invention is to provide weeding rubber, which has a simple structure and which is capable of having a long period of weeding effect and weeding a large area, and a method of manufacturing said weeding rubber.
l:)ISCLOSURE OF THE INVENTION
To achieve the object, inventors of the present invention have studied about the best season of weeding with weed killers and the best means for gradually introducing out weed killers, then they found out that the best season is the time when weeds' seeds germinate, and that the weed killers are capable of gradually coming out from rubber members when they are dipped in the water.
Further, they found out that the weeding effect can be accelerated by forming through-holes through which rain water and the sunlight are capable of passing in the rubber member in which the weed killer is included.
The inventors have invented the present invention on the basis of above described facts.
Namely, the weeding rubber of the present invention comprises: a rubber member being formed into a prescribed shape, the rubber member including a water-soluble weed killer; and a plurality of through-holes through which water and light are capable of passing.
And the method of manufacturing the weeding rubber comprises the steps of: kneading a rubber-material in which a vulcanizing agent and a water-soluble weed killer have been added; forming the rubber-material into a rubber member having a prescribed shape; vulcanizing the rubber member; and forming a plurality of through-holes through which water and light are capable of passing in the rubber member.
In the present invention, by employing the water-soluble weed killer, which is capable of killing weeds germinating in the ground, the weeding effect can be increased.
To uniformly scatter the weed killer in the rubber member and accelerate the elution thereof, the weed killer is preferably formed into grains having diameter of 0.8 ~m - 1 mm; and to increase forming ability of the rubber member, the weight of the weed killer is preferably 10 - 90 WT% of the rubber member.
Further, if porous grains in which the water-soluble weed killer has been previously impregnated are added in the rubber member, a large amount of the weed killer can be included therein. In this case, vegetable porous grains such as sawdust and buffs are preferable.
Weeding in a large area can be executed if the rubber member is formed into a plate; the weeding rubber can be attached to legs of the pylons if the rubber member is formed into a cylindrical shape.
In the weeding rubber of the present invention, the sunlight and rain water can reach the ground through the through-holes, so that the germination of seeds of weeds can be accelerated. While the weeds germinate, the weed killer, which comes out from the rubber member and dissolves in the rain water, exists in the ground with high density, so that the weeds germinating in the ground can be killed easily.
And in the present invention, since the weed killer is directly mixed with the rubber member, a large amount of the weed killer can be included therein, so that the period of weeding effect can be longer. Moreover, the weeding rubber is not required to have a complex structure, the structure thereof can be simpler.
Further, since there are formed a plurality of the through-holes through which the sunlight and rain water are capable of passing, a large weeding area can be covered easily.
Note that, the detail theory that the weed killer comes out from the weeding rubber is not clearly known now, but the inventors think that the weed killer is introduced out from the rubber member via very fine holes or paths in the rubber.
Existence of said fine holes or paths is presumed by the fact that inner pressure of a flask, which has been reduced below the air pressure, with a rubber plug, which closes a mouth of the flask, is gradually reach the air pressure.
BRIEF DESCRIPTION OF THE DRAWIN~S
Fig. 1 is a perspective view showing an embodiment of the weeding rubber of the present invention; Fig. 2 is a sectional view showing the weeding rubber shown in Fig. 1, which is set on the ground; and Fig. 3 is a graph showing the change of the weight of the rubber member, which includes the weed killer and which is dipped in the water, with the lapse of time.
THE BEST MODE OF THE INVENTION
In the present invention, it is necessary that a water-soluble weed killer is included in a rubber formed into a prescribed shape.
If rubber moleculer chains are formed into a mutually bridged net structure by vulcanizing, not only natural rubber but also plastic rubber can be used for forming the rubber member.
The rubber member may be formed any shape, preferably a sheet form, a plate form, etc., if it is able to have a plurality of through-holes, which will be explained later.
Any water-soluble weed killers may be employed in the present invention, especially weed killers, which are capable of killing weeds germinating in the ground, is preferably employed. Concretely, simazine ~2-chloro-4,6-bis(ethylamino)-1,3,5-triazine), karubutilate (3-[3-(N-tert-butylcarbamoyloxy) phenyl]l,ldimethylurea), DPA-Na (sodium salt of 2,2-dichloropropionic acid), tetrapion (2,2,3,3-tetrafluoropropionic acid), etc. may be employed as the weed killer.
The weed killer may be formed into grains and impregnated in porous grains. Vegetable porous grains such as sawdust and buffs are preferably employed as said porous grains.
To uniformly scatter the weed killer in the rubber member and accelerate the elution thereof, the diameter of the weed killer grains is 0.~ m - 1 mm. If the diameter is less than 0.8 ~m, the weed killer can be more uniformly scattered but the elution speed must be slower so that enough weeding effect cannot gained. On the other hand, if the diameter is greater than 1 mm, the elution speed must be too fast so that the desired slow weeding effect and highly uniform scattering ability of the weed killer cannot gained.
The amount of the weed killer depends on the desired weeding effect but it is preferably 10 - 90 WT% (more preferably 20 - 40 WT%) of the rubber member. If the amount is less than 10 WT% thereof, the period of weeding effect must be shorter; if the amount is greater than 90 ~T%, the forming ability of the rubber member gets worse.
In the present invention, it is important for the rubber member, which has been formed into a prescribed shape and which has included the weed killer, to have a plurality of through-holes through which the sunlight and the rain water are capable of passing.
The rain water and the sunlight reaching the ground via the through-holes accelerate the germination of weeds' seeds;
the weed killer, which has been included in the rubber member dissolves into the rain water, which flows on the upper face of the rubber member, can exist in the ground, in which the the seeds germinating exist, with high density.
Further, the time when the seeds germinate is the most effective time of weeding, so the weeds germinating in the ground can be killed easily.
From an above described point of view, the conventional weeding mat disclosed in the Japanese Utility Model Publication Gazette No. 3-23102 substantially has no through-holes for passing the sunlight and the rain, so the weeds are not accelerated to germinate and they stay in the form of seeds, thus enough weeding effect cannot be gained.
In the weeding rubber of the present invention, if the sunlight and rain are able to pass, the shape and the size of the through-holes are not limited. Thus, the weeding rubber may be formed into, for example, a net.
The weeding rubber may be manufactured by kneading a rubber-material in which a vulcanizing agent and the granular water-soluble weed killer and forming the rubber-material into the rubber member having a prescribed shape.
In the present invention, specific kneading conditions are not required, so they can be made under usual kneading conditions of manufacturing rubber products.
And grains in which the water-soluble weed killer has been previously included may be added for the kneading step in stead of the granular weed killer. In this case, a large amount of the weed killer can be impregnated by employing porous grains. Vegetable porous grains, e.g., sawdust, buffs, are preferably employed as the porous grains.
The rubber-material, which has been manufactured by kneading with the vulcanizing agent and the water-soluble weed killer, is vulcanized after forming into the prescribed shape.
The rubber-material may be vulcanized under usual vulcanizing conditions. The vulcanization may be executed by heating while the rubber-material is formed into the rubber member having the prescribed shape by a press machine.
In the present invention, there are bored a plurality of through-holes through which the sunlight and rain water are capable of passing in the rubber member. The step of boring the through-hole in the rubber member having the prescribed shape may be executed not only before the vulcanization but also after the vulcanization.
In case of vulcanizing the rubber member having the through-holes, the vulcanization is executed without closing or filling the through-holes.
If the weeding rubber of the present invention is formed into a cylindrical shape, it can be used by covering over legs of pylons so as to prevent vines from climbing upward. In this case, to easily cover the legs, it is preferable for the rubber member to make a break line in the longitudinal direction. Further, if a snap fastener, for example, is provided in the vicinity of the break line, it is easier to open and close the break line.
In case of forming the rubber member into a plate, the weeding rubber can be preferably used for removing weeds in shoulders of roads or rail roads, in golf courses, etc..
In the present invention, the structure of the weeding rubber can be simple and the weeding effect can be continued for a long time, so that the weeding in a large area can be executed with low cost.
EMBODIMENTS
(First Embodiment~
To observe the gradual elution of the weed killer from the rubber member, the rubber member, which includes the weed killer, was dipped in water and its speed of reducing weight has been measured.
In this embodiment, the rubber member was manufactured by kneading ethylene-propylene-diene rubber (EPDM), a known vulcanizing agent, sawdust, buffs and a weed killer, then the rubber member is vulcanized under usual vulcanizing conditions and formed into a sample piece having prescribed size.
In this embodiment, the weed killer has been previously impregnated in the sawdust and the buffs, then they have kneaded with the EPDM compound.
MATERIALS
the EPDM compound300 g the buffs 100 g the sawdust 50 g the weed killer 50 g DPA-Na 20 g tetrapion 30 g SIZE OF THE SAMPLE PIECE
5 cm x 5 cm x 4 cm The sample piece was dipped in 150 ml of distilled water for a prescribed time, then it was dried in an atmosphere of 120 C and measured its own weight. The rate of losing weight of the sample piece or the amount of the elution of the weed killer is calculated as the weight difference between the weight of the sample piece before dipping and that measured after dipping.
In this embodiment, another sample piece, which did not include the weed killer but kneaded in the same manner, was prepared as a blank, and it was dipped in the water, dried and measured its own weight so as to know the rate of losing weight of the blank, then the rate of losing weight of the sample piece including the weed killer was corrected on the basis of that of the blank.
The results is shown in a graph of Fig. 1. As shown in Fig. 1, the rate of losing weight of the sample piece shows that the rate linearly changes from the start of dipping until 48 hours, namely the weed killer is gradually eluted.
Based on the linear change, it takes about 938 hours (about 39 days) to elute 10 % of the weed killer.
Note that, in this embodiment, the sample piece was dipped in the water, so it will take longer time to elute the weed killer from the sample piece by rain.
(Second Embodiment) In this embodiment, the rubber member was manufactured by 1 ~
kneading ethylene-propylene-diene rubber (EPDM), a known vulcanizing agent, and granular karbutilate (Trade Name:
Tandex) as a weed killer, their weight is shown in TABLE 1.
Kneading conditions are as well as usual conditions for the EPDM.
Successively, a rubber-material kneaded was formed into a plate and vulcanized under usual vulcanizing conditions, then a plurality of through-holes were bored therein.
As shown in Fig. 2, the rubber-material was formed into a square plate 10 having size of 30 cm x 30cm and 225 through-holes 12, 12,...who~e diameter was each 5 mm.
The plate 10 shown in Fig. 2 was located on the ground as shown in Fig. 3 from August 3, 1995 to September 6, 1995, and the degree of growing weeds, which grew up in the through-holes 12, was measured. The results are also shown in the TABLE 1.
AMOUNT OF THE
WEED KILLER (WT%) 0 20 40 DEGREE OF ~ROWING WEEDS
Note) The degree of growing weeds "LOW" indicates the number of the through-holes 12 in which weeds have grew 1 - 2.5 cm high from the upper face of the plate 10;
The degree of growing weeds "MEDIUM" indicates the number of the through-holes 12 in which weeds have grew 2.5 - 5 cm high from the upper face of the plate 10; and The degree of growing weeds "HI&H" indicates the number of the through-holes 12 in which weeds have grew 5 cm high or more from the upper face of the plate 10.
As shown in the TABLE 1, in case of the plate with no weed killer, since not only about one month in summer during which weeds grow the most but also the sunlight and rain reached the ground through the through-holes 12, weeds were capable of growing much in the through-holes 12. On the other hand, in case of the plate with the weed killer, the weeding effect was clearly observed with respect to the case of no weed killer.
Claims (16)
1. Weeding rubber, comprising:
a rubber member being formed into a prescribed shape, said rubber member including a water-soluble weed killer;
and a plurality of through-holes through which water and light are capable of passing.
a rubber member being formed into a prescribed shape, said rubber member including a water-soluble weed killer;
and a plurality of through-holes through which water and light are capable of passing.
2. The weeding rubber according to Claim 1, wherein said weed killer is capable of killing weeds, which have germinated in the ground.
3. The weeding rubber according to Claim 1, wherein said weed killer is formed into grains, which have diameter of 0.8 µm - 1 mm.
4. The weeding rubber according to Claim 1, wherein the weight of said weed killer is 10 - 90 WT%
of said rubber member.
of said rubber member.
5. The weeding rubber according to Claim 1, wherein said weed killer is impregnated in porous grains.
6. The weeding rubber according to Claim 5, wherein said porous grains are vegetable porous grains such as sawdust and buffs.
7. The weeding rubber according to Claim 1, wherein said rubber member is formed into a plate.
8. The weeding rubber according to Claim 1, wherein said rubber member is formed into a cylindrical shape.
9. A method of manufacturing weeding rubber, comprising the steps of:
kneading a rubber-material in which a vulcanizing agent and a water-soluble weed killer have been added;
forming said rubber-material into a rubber member having a prescribed shape;
vulcanizing said rubber member; and forming a plurality of through-holes through which water and light are capable of passing in said rubber member.
kneading a rubber-material in which a vulcanizing agent and a water-soluble weed killer have been added;
forming said rubber-material into a rubber member having a prescribed shape;
vulcanizing said rubber member; and forming a plurality of through-holes through which water and light are capable of passing in said rubber member.
10. The method according to Claim 9, wherein a weed killer, which is capable of killing weeds which have germinated in the ground, is employed as said water-soluble weed killer.
11. The method according to Claim 9, wherein grains, which have diameter of 0.8 µm - 1 mm, are employed as said water-soluble weed killer.
12. The method according to Claim 9, wherein the weight of said water-soluble weed killer is 10 - 90 WT% of said rubber member.
13. The method according to Claim 9, further comprising the step of adding porous grains in which said water-soluble weed killer is impregnated.
14. The method according to Claim 13, wherein vegetable porous grains such as sawdust and buffs are employed as said porous grains.
15. The method according to Claim 9, wherein said rubber member is formed into a plate after said kneading step.
16. The method according to Claim 9, wherein said rubber member is formed into a cylindrical shape after said kneading step.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5-293011 | 1993-11-24 | ||
| JP29301193A JPH07143838A (en) | 1993-11-24 | 1993-11-24 | Herbicidal rubber material and its production |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA2152951A1 true CA2152951A1 (en) | 1995-06-01 |
Family
ID=17789324
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA 2152951 Abandoned CA2152951A1 (en) | 1993-11-24 | 1994-11-24 | Rubber product for weeding and method of manufacturing same |
Country Status (5)
| Country | Link |
|---|---|
| JP (1) | JPH07143838A (en) |
| AU (1) | AU1076795A (en) |
| CA (1) | CA2152951A1 (en) |
| GB (1) | GB2290028A (en) |
| WO (1) | WO1995014378A1 (en) |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS63160538A (en) * | 1986-12-25 | 1988-07-04 | 東ソー株式会社 | Herbicidal sheet |
-
1993
- 1993-11-24 JP JP29301193A patent/JPH07143838A/en active Pending
-
1994
- 1994-11-24 AU AU10767/95A patent/AU1076795A/en not_active Abandoned
- 1994-11-24 CA CA 2152951 patent/CA2152951A1/en not_active Abandoned
- 1994-11-24 WO PCT/JP1994/001985 patent/WO1995014378A1/en active Application Filing
- 1994-11-24 GB GB9514597A patent/GB2290028A/en not_active Withdrawn
Also Published As
| Publication number | Publication date |
|---|---|
| AU1076795A (en) | 1995-06-13 |
| GB2290028A (en) | 1995-12-13 |
| GB9514597D0 (en) | 1995-10-04 |
| JPH07143838A (en) | 1995-06-06 |
| WO1995014378A1 (en) | 1995-06-01 |
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| Date | Code | Title | Description |
|---|---|---|---|
| EEER | Examination request | ||
| FZDE | Dead |