WO2018182543A2 - Soil covering material having structural layers - Google Patents
Soil covering material having structural layers Download PDFInfo
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- WO2018182543A2 WO2018182543A2 PCT/TH2018/000011 TH2018000011W WO2018182543A2 WO 2018182543 A2 WO2018182543 A2 WO 2018182543A2 TH 2018000011 W TH2018000011 W TH 2018000011W WO 2018182543 A2 WO2018182543 A2 WO 2018182543A2
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- WIPO (PCT)
- Prior art keywords
- soil covering
- structural layers
- covering material
- soil
- plants
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Classifications
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- 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
Definitions
- soil covering materials in agriculture is the process of covering soils with materials in order to improve soil properties.
- materials including those classified according to the type of materials and in the form of covering sheet ranging from stones, pebbles, rice straws, dipterocarpus tuberculatus leaves, plastic, asphalt paper, and kraft paper.
- covering soils better soil properties can be seen. These include the increase of the organic substances which prevent surface soil erosion, the control of weeds on soil surface, etc.
- Polyethylene plastic when decomposed, can create dangerous chemical substances such as phthalate esters, di- (2-ethylhexyl) phthalate, aldehydes, and ketones.
- phthalate esters di- (2-ethylhexyl) phthalate
- aldehydes aldehydes
- ketones ketones
- EP1875798A1 disclosed soil covering materials made from cellulose fibers coated with wax or acrylic resins.
- Wax such as paraffin provides the water resistance property and acrylic resins such as polyethylene are the colorant bonding agent.
- US6293045B1 disclosed the preparation of soil covering materials comprising natural fibers such as cellulose fibers, cotton fibers, or protein fibers which are decomposable.
- the substance or material for making foam is used together with the bonding agent thereby making soil covering materials having porosity and good air and water ventilation and still preventing the growth of weeds due to sunlight.
- CN201221702U disclosed the soil covering paper having paper as the main structure and surface coated with grafted starch having the property in heat protection.
- This soil covering paper comprises three layers namely 1) paper pulp layer, 2) layer of coating substance for protection against heat rays (heat preservation coating) consisting of the mixture of flour, additives, and powder from rice straws in the size of 75-106 microns, and 3) layer of coating substance.
- US2013009523A1 disclosed the soil covering paper sheet having multiple layers.
- the said sheet has the core structure as paper shreds attached to the upper and lower structures.
- the other materials can be used such as paper sheets, plastic sheets, or knitted and woven sheets.
- the additives can also be used as a bonding agent. These include flour, glue or polyvinyl alcohol as well as the other special substances such as fertilizer or biocide.
- CN102599030B disclosed the plastic films having the composition of sludge in the amount of 10- 80% being specifically processed. This increases the water holding capacity, heat protection, and the release of nutrients. This covers the method of preparation, types of plastic, plastic compositions, mixture and various additives and also films having natural material compositions such as fibers or flour.
- JP6062680A disclosed the sheet having structure of layers which have the compositions of wood pulp and opaque compositions of carbon black and other substances such as water insolubilizes or binder and chitosan layers used for covering soil for agricultural plants and can be naturally decomposed.
- soil covering materials having structural layers have been invented and developed. Such developments provide the ability to control the decomposition rate and the soil temperature suitable for each kind of plant.
- Soil covering materials in the type of paper have the property of covering soil thereby preventing weeds. When contacting sunlight, heat will not be accumulated and the temperatures of the soil covering material surface, soil surface, and under soils can be reduced. Based on the porous structure having water holding capacity and suitable heat transfer from soils, soils with a suitable level of moisture can be obtained. Additionally, it can still further be improved in terms of the quality so that it can be used for more than 6 months and subsequently decomposed into organic substance in soils without residues that are considered as pollutions to the environment.
- This invention is related to soil covering material having structural layers in the form of sheet comprising at least three structural layers namely at least one structural layer having a composition of sludge from pulp manufacturing process or pulp sludge from paper manufacturing process and at least the other two layers having a composition of recycled pulp. These are put tougher by using bonding materials for bonding between layers.
- This invention is also related to the increase of the strength of the soil covering material having structural layers by using strength- enhancing additive. This is to prevent deterioration and increase stability to soil covering material having structural layers thereby extending the time that the materials can be used.
- Figure 1 shows the decomposition rate of the soil covering materials in the strawberry farm (a) sample Tl which is the soil covering material having structural layers according to this invention (b) sample T2 which is the soil covering material having one layer according to the testing time at 2, 3, and 4 months.
- said soil covering material having structural layers further comprises bonding material used for bonding between layers wherein bonding material for bonding between layers is selected from native starch, cationic starch, amphoteric starch, polyvinyl alcohol, or a combination of at least two thereof.
- the said soil covering material having structural layers further comprises strength- enhancing substance used for increasing the stability to the soil covering material having structural layers when wet or when water is sprayed during the process of growing young plants and preventing deterioration of soil covering material having structural layers when soaked.
- the said strength- enhancing additive is selected from urea- formaldehyde, melamine- formaldehyde, glyoxal- polyacrylamide copolymer, epoxidized polyamide, polyamide epichlorohydrin or a combination of at least two thereof.
- the said soil covering material having structural layers has the suitable total weight in the range of 120-400 grams per square meter and has the suitable weight of each layer of at least 40 grams per square meter.
- Recycled pulp according to this invention is selected from old corrugating container (OCC), box board cutting (BBC), old newsprint (ONP), over issue newsprint (OIN), white blank news (WBN), or a combination of at least two thereof.
- the process of manufacturing said soil covering material having structural layers comprises the steps of
- the steps a and b of the method of manufacturing soil covering sheet having structural layers according to this invention further comprise the mix of strength enhancing substance.
- the suitable covered area is the area around the base of young plant or plant. This is to prevent weeds, reduce the temperatures on the surface of soil covering materials, soil surface and under soil surface, and provide the water holding capacity and heat transfer from soils.
- the soils contain moisture and have the temperature suitable to the growth of plant roots, young plants or plants and allow the better nutrient absorption thereby leading to higher productivity and the ability to control decomposition rate in accordance with the growing time period of each kind of young plant or plant.
- the suitable young plants or plants include eucalyptus, strawberry, temperate fruit plants, and cucurbitaceous plants.
- soil covering materials according to this invention comprise compositions, amounts of compositions, and various details as aforementioned.
- soil covering materials having structural layers according to this invention are not limited to compositions, amounts of compositions, and various details as aforementioned and can be adjusted or modified and still considered to fall within the scope and concept of this invention.
- sample Tl soil covering material having structural layers according to this invention comprises
- the first layer and the third layer having a composition derived from old newsprint (ONP) in the ratio of 71.25 percent by the total weight of soil covering material having structural layers
- the second layer having a composition of pulp sludge from pulp manufacturing process or pulp sludge from paper manufacturing process in the ratio of 23.75 percent by the total weight of soil covering material having structural layers and
- the sample T2 is the soil covering material having single layer made from the mixture of old newsprint (ONP), pulp sludge from pulp manufacturing process or pulp sludge from paper manufacturing process, and wet strength-enhancing substance in the same ratio as those of Tl.
- ONP old newsprint
- pulp sludge from pulp manufacturing process or pulp sludge from paper manufacturing process pulp sludge from paper manufacturing process
- wet strength-enhancing substance in the same ratio as those of Tl.
- the assessment of the ability to prevent weed growth in the strawberry planting farm was based on the assessment in the planting farm in the size of 1 x 20 square meter during the planting period from 1 to 4 months.
- the Table 2 shows the area of weed growth on the planting area
- Soil covering materials having structural layers according to this invention comprise natural compositions which are environmental friendly and thus will decompose after a certain time period.
- the time period of decomposition needs to be suitable with the growing period of each kind of plant. This is to make soil covering materials having structural layer durable to the weather conditions and growing environment. Thus, the materials do not need to be replaced too often. Frequent replacement will lead to the higher growing cost and waste.
- the decomposition rate of soil covering materials having structural layers according to this invention was examined. The testing results are shown in the Table 3.
- Table 4 The comparison with the other soil covering materials in the strawberry planting area during the period of 4 months
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- Health & Medical Sciences (AREA)
- General Health & Medical Sciences (AREA)
- Toxicology (AREA)
- Life Sciences & Earth Sciences (AREA)
- Environmental Sciences (AREA)
- Laminated Bodies (AREA)
- Protection Of Plants (AREA)
Abstract
This invention is related to soil covering material having structural layers in the form of sheet comprising at least three structural layers namely at least one structural layer having a composition of sludge from pulp manufacturing process or pulp sludge from paper manufacturing process and at least the other two layers having a composition of paper pulp (recycled pulp). This invention is also related to the use of soil covering material having structural layers for covering soil and/or material floor used for planting young plants or plants.
Description
SOIL COVERING MATERIAL HAVING STRUCTURAL LAYERS
FIELD OF INVENTION
Chemistry and material science in relation to soil covering material having structural layers BACKGROUND OF RELEVANT PRIOR ARTS
The use of soil covering materials in agriculture is the process of covering soils with materials in order to improve soil properties. There are several types of materials including those classified according to the type of materials and in the form of covering sheet ranging from stones, pebbles, rice straws, dipterocarpus tuberculatus leaves, plastic, asphalt paper, and kraft paper. When covering soils, better soil properties can be seen. These include the increase of the organic substances which prevent surface soil erosion, the control of weeds on soil surface, etc.
Additionally, for planting various plants at present, the use of plastic as soil covering material has been increasingly applied. Such use of soil covering plastic is considered as white revolution which leads to the understanding that there will be lower use of water and an increase in productivity. This is because water cannot easily evaporate from soils. On the contrary, it is found that there are environmental problems in which the plastic residuals left in the farm after the use of soil covering plastic cause pollution to soils and affects the moisture and nutrient cycle in soils. Plastic has effects in the water absorption in soils and reduces the speed of water penetration. These lead to the reduction of growth of plants and plant roots. Furthermore, plastic residuals also have the effect of increasing soil salinity. Polyethylene plastic, when decomposed, can create dangerous chemical substances such as phthalate esters, di- (2-ethylhexyl) phthalate, aldehydes, and ketones. Hence, the elimination of used plastic from farms is necessary in order to reduce the long-term effects in the agricultural area. Such elimination will also incur the cost in the said proceeding.
Therefore, solutions to the problems in using plastic for soil covering have been developed by utilizing substitute materials from nature such as rice straws or dipterocarpus tuberculatus leaves which can partially solve the problem. However, there are other effects from using such soil covering materials. These include the issues that rice straws, when used, can attract insects and diseases. Also, if grass seeds are attached to these materials, they can grow into weeds. In the case of dipterocarpus tuberculatus leaves, it is found that there are issues with regard to insufficient supply and high cost. When the growing season ends, the problem that the materials do not decompose is found. Thus, it is necessary to hire labors to remove the materials from the
planting area and this increases the production cost. Additionally, dipterocarpus tuberculatus leaves can release toxic substances into the environment over a long-term period.
Prior arts, particularly patents, disclosed soil covering materials as per the following examples
EP1875798A1 disclosed soil covering materials made from cellulose fibers coated with wax or acrylic resins. Wax such as paraffin provides the water resistance property and acrylic resins such as polyethylene are the colorant bonding agent.
US6293045B1 disclosed the preparation of soil covering materials comprising natural fibers such as cellulose fibers, cotton fibers, or protein fibers which are decomposable. The substance or material for making foam is used together with the bonding agent thereby making soil covering materials having porosity and good air and water ventilation and still preventing the growth of weeds due to sunlight.
CN201221702U disclosed the soil covering paper having paper as the main structure and surface coated with grafted starch having the property in heat protection. This soil covering paper comprises three layers namely 1) paper pulp layer, 2) layer of coating substance for protection against heat rays (heat preservation coating) consisting of the mixture of flour, additives, and powder from rice straws in the size of 75-106 microns, and 3) layer of coating substance.
US2013009523A1 disclosed the soil covering paper sheet having multiple layers. The said sheet has the core structure as paper shreds attached to the upper and lower structures. The other materials can be used such as paper sheets, plastic sheets, or knitted and woven sheets. The additives can also be used as a bonding agent. These include flour, glue or polyvinyl alcohol as well as the other special substances such as fertilizer or biocide.
CN102599030B disclosed the plastic films having the composition of sludge in the amount of 10- 80% being specifically processed. This increases the water holding capacity, heat protection, and the release of nutrients. This covers the method of preparation, types of plastic, plastic compositions, mixture and various additives and also films having natural material compositions such as fibers or flour.
JP6062680A disclosed the sheet having structure of layers which have the compositions of wood pulp and opaque compositions of carbon black and other substances such as water insolubilizes or binder and chitosan layers used for covering soil for agricultural plants and can be naturally decomposed.
However, from the aforementioned problems, soil covering materials having structural layers have been invented and developed. Such developments provide the ability to control the
decomposition rate and the soil temperature suitable for each kind of plant. Soil covering materials in the type of paper have the property of covering soil thereby preventing weeds. When contacting sunlight, heat will not be accumulated and the temperatures of the soil covering material surface, soil surface, and under soils can be reduced. Based on the porous structure having water holding capacity and suitable heat transfer from soils, soils with a suitable level of moisture can be obtained. Additionally, it can still further be improved in terms of the quality so that it can be used for more than 6 months and subsequently decomposed into organic substance in soils without residues that are considered as pollutions to the environment.
SUMMARY OF THE INVENTION
This invention is related to soil covering material having structural layers in the form of sheet comprising at least three structural layers namely at least one structural layer having a composition of sludge from pulp manufacturing process or pulp sludge from paper manufacturing process and at least the other two layers having a composition of recycled pulp. These are put tougher by using bonding materials for bonding between layers.
This invention is also related to the increase of the strength of the soil covering material having structural layers by using strength- enhancing additive. This is to prevent deterioration and increase stability to soil covering material having structural layers thereby extending the time that the materials can be used.
It is the objective of this invention to provide soil covering material having structural layers made from pulp sludge from pulp manufacturing process or pulp sludge from paper manufacturing process and recycled paper pulp. Such material has been developed and has several advantages including
- can naturally decompose
- decomposes and turns into organic materials and nutrients to soils
- does not leave leftover substances that can cause environmental pollution
- extends the time that the soil covering materials can be used and thus it is not necessary to replace soil covering materials often thereby reducing the cost in planting.
- increases the number of good products demanded in the market
BRIEF DESCRIPTIONS OF THE DRAWINGS
Figure 1 shows the decomposition rate of the soil covering materials in the strawberry farm (a) sample Tl which is the soil covering material having structural layers according to this invention (b) sample T2 which is the soil covering material having one layer according to the testing time at 2, 3, and 4 months.
DESCRIPTIONS OF THE PREFERRED EMBODIMENTS
The clearer details in relation to this invention will now be described.
This invention discloses soil covering material having structural layers in the form of sheet characterized in that it comprises at least three structural layers namely
- at least one structural layer having a composition of pulp sludge from pulp manufacturing process or pulp sludge from paper manufacturing process and has a structure similar to paper pulp and can be easily decomposed by microorganisms. This is thus used as a layer for controlling decomposition rate of soil covering material having structural layers. - at least the other two layers having a composition of recycled pulp which is the primary composition for maintaining the shape in the form of sheet of soil covering materials and provide opacity suitable to the control of weeds
According to this invention, said soil covering material having structural layers further comprises bonding material used for bonding between layers wherein bonding material for bonding between layers is selected from native starch, cationic starch, amphoteric starch, polyvinyl alcohol, or a combination of at least two thereof.
According to this invention, the said soil covering material having structural layers further comprises strength- enhancing substance used for increasing the stability to the soil covering material having structural layers when wet or when water is sprayed during the process of growing young plants and preventing deterioration of soil covering material having structural layers when soaked. The said strength- enhancing additive is selected from urea- formaldehyde, melamine- formaldehyde, glyoxal- polyacrylamide copolymer, epoxidized polyamide, polyamide epichlorohydrin or a combination of at least two thereof.
According to this invention, the said soil covering material having structural layers has the suitable total weight in the range of 120-400 grams per square meter and has the suitable weight of each layer of at least 40 grams per square meter.
Recycled pulp according to this invention is selected from old corrugating container (OCC), box board cutting (BBC), old newsprint (ONP), over issue newsprint (OIN), white blank news (WBN), or a combination of at least two thereof.
According to this invention, the process of manufacturing said soil covering material having structural layers comprises the steps of
a. Preparation of recycled pulp slurry
b. Preparation of pulp sludge from pulp manufacturing process or pulp sludge from paper manufacturing process
c. Making recycled pulp slurry diluted
d. Making pulp sludge from pulp manufacturing process or pulp sludge from paper manufacturing process diluted and
e. Forming soil covering materials having structural layers comprising at least three layers; bringing diluted recycled pulp slurry and sludge from pulp manufacturing process or pulp sludge from paper manufacturing process through sieve (screen/wire) in which the order of passing through starts from, the layer of diluted recycled pulp slurry, the layer of diluted pulp sludge from pulp manufacturing process or pulp sludge from paper manufacturing process and the layer of diluted recycled pulp slurry wherein each layer is bonded through boding materials; pressing and drying in order to remove water
The steps a and b of the method of manufacturing soil covering sheet having structural layers according to this invention further comprise the mix of strength enhancing substance.
According to this invention, for the use of soil covering material having structural layers for covering soil and/ or material floor for planting young plants or plants, the suitable covered area is the area around the base of young plant or plant. This is to prevent weeds, reduce the temperatures on the surface of soil covering materials, soil surface and under soil surface, and provide the water holding capacity and heat transfer from soils. Thus, the soils contain moisture and have the temperature suitable to the growth of plant roots, young plants or plants and allow the better nutrient absorption thereby leading to higher productivity and the ability to control decomposition rate in accordance with the growing time period of each kind of young plant or plant. The suitable young plants or plants include eucalyptus, strawberry, temperate fruit plants, and cucurbitaceous plants.
As per the details explained aboye, soil covering materials according to this invention comprise compositions, amounts of compositions, and various details as aforementioned. However, soil covering materials having structural layers according to this invention are not limited to compositions, amounts of compositions, and various details as aforementioned and can be adjusted or modified and still considered to fall within the scope and concept of this invention.
This invention will now be further described by way of examples. However, it should be understood that these examples will not be considered as a limitation to the scope of this invention. Samples
1. The preparation of sample of soil covering material having structural layers
The sample Tl : soil covering material having structural layers according to this invention comprises
- The first layer and the third layer having a composition derived from old newsprint (ONP) in the ratio of 71.25 percent by the total weight of soil covering material having structural layers
- The second layer having a composition of pulp sludge from pulp manufacturing process or pulp sludge from paper manufacturing process in the ratio of 23.75 percent by the total weight of soil covering material having structural layers and
strength-enhancing substance of 5 percent by the total weight of soil covering material having structural layers
The sample T2 is the soil covering material having single layer made from the mixture of old newsprint (ONP), pulp sludge from pulp manufacturing process or pulp sludge from paper manufacturing process, and wet strength-enhancing substance in the same ratio as those of Tl.
2. Physical properties of soil covering material having structural layers
Samples of soil covering material having structural layers according to this invention were brought for the physical tests including
Basis weight according to ISO 536:2012
Thickness according to ISO 534:2011
Density according to ISO 534:2011
Tensile strength according to ISO 1924-2:2008
Stretch according to ISO 1924-2:2008
Tensile energy absorption: TEA according to ISO 1924-2:2008
Tear index according to ISO 1974:2012
Tensile stiffness according to ISO 1924-2:2008
Table 1 physical properties of soil covering material having structural layers
From the results in the table 1, it was found that the sample Tl tended to provide higher mechanical strength when compared to the sample T2 in both dry and wet tests.
3. The prevention of weed growth around the bases of young plants
The assessment of the ability to prevent weed growth in the strawberry planting farm was based on the assessment in the planting farm in the size of 1 x 20 square meter during the planting period from 1 to 4 months.
The Table 2 shows the area of weed growth on the planting area
The results from table 2 show that there are differences of 5-10% in terms of efficiency in preventing weeds with respect to the area and period of time of decomposition. As the Tl covering paper decomposed slowly, grasses grew less so it can be used for covering farm longer than the sample T2.
4. The decomposition of soil covering material in the strawberry planting farm during the period of 4 months.
Soil covering materials having structural layers according to this invention comprise natural compositions which are environmental friendly and thus will decompose after a certain time period. However, in the actual implementation, the time period of decomposition needs to be suitable with the growing period of each kind of plant. This is to make soil covering materials having structural layer durable to the weather conditions and growing environment. Thus, the materials do not need to be replaced too often. Frequent replacement will lead to the higher growing cost and waste. The decomposition rate of soil covering materials having structural layers according to this invention was examined. The testing results are shown in the Table 3.
Table 3 The rate of decomposition of soil covering material having structural layers in the strawberry planting farm
From the test results according to table 3 and figure 1, it was found that the sample Tl had the lower decomposition rate when compared to the sample T2 and thus the sample Tl can be used in covering planting soil for a longer time period.
5. The comparison with the other soil covering materials
Other than the tests of various properties of soil covering materials having structural layers as aforementioned, the results of the other comparison tests in relation to the other soil covering materials as presently used are shown in the table 4.
Table 4: The comparison with the other soil covering materials in the strawberry planting area during the period of 4 months
From the comparison results in table 4, it can be seen that the strawberry products obtained from the use of soil covering materials having structural layers were better when compared to the products obtained from the use of soil covering plastic materials, particularly, with regard to the number of products without defects. The use of soil covering materials having structural layers yielded products without defects for more than 80% of the total products. These products without defects can be sold at a better price and thus clearly increase the income for the famers or the strawberry growers.
Claims
1. Soil covering material having structural layers in the form of sheet comprising at least three structural layers namely
at least one structural layer having a composition of pulp sludge from pulp manufacturing process or pulp sludge from paper manufacturing process and;
at least the other two layers having a composition of recycled pulp
2. Soil covering material having structural layers according to claim 1 wherein the said soil covering material having structural layers further comprises bonding material for bonding between layers.
3. Soil covering material having structural layers according to claim 2 wherein bonding material for bonding between layers is selected from native starch, cationic starch, amphoteric starch, polyvinyl alcohol, or a combination of at least two thereof.
4. Soil covering material having structural layers according to claim 1 wherein the said soil covering material having structural layers further comprising strength-enhancing additive.
5. Soil covering material having structural layers according to claim 4 wherein the said strength- enhancing additive is selected from urea- formaldehyde, melamine- formaldehyde, glyoxal- polyacrylamide copolymer, epoxidized polyamide, polyamide epichlorohydrin or a combination of at least two thereof.
6. Soil covering material having structural layers according to any of claims 1 to 5 wherein the said soil covering material having structural layers has the suitable total weight in the range of 120-400 gram per square meter.
7. Soil covering material having structural layers according to any of claims 1 to 5 wherein the said soil covering material having structural layers has the suitable weight of each layer of at least 40 grams per square meter.
8. Soil covering material having structural layers according to claim 1 wherein recycled pulp is selected from Old corrugating container ( OCC) , Box board cutting ( BBC) , Old newsprint ( ONP) , Over issue newsprint ( OIN) , White blank news ( WBN) , or a combination of at least two thereof.
9. The use of soil covering material having structural layers according to any of the above claims for covering soil and/or material floor for planting young plants or plants in which the suitable covered area is the area around the base of young plant or plants.
10. The use of soil covering material having structural layers according to claim 9 wherein the suitable young plants or plants include eucalyptus, strawberry, temperate fruit plants, and cucurbitaceous plants.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201880019759.0A CN110557940A (en) | 2017-03-29 | 2018-03-26 | Soil covering material with structural layer |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| TH1703002391U TH14843C3 (en) | 2017-03-29 | Structural layer mulch material | |
| TH1703002391 | 2017-03-29 |
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| WO2018182543A2 true WO2018182543A2 (en) | 2018-10-04 |
| WO2018182543A3 WO2018182543A3 (en) | 2019-03-21 |
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| BE1006371A4 (en) * | 1991-12-16 | 1994-08-02 | Wetenschappelijk En Tech Ct Vo | Vegetation inhibitory product for planting. |
| US6164011A (en) * | 1998-02-02 | 2000-12-26 | Cascades Multi-Pro Inc. | Biodegradable and biocompatible agricultural mulch and method of preparing same |
| KR100282260B1 (en) * | 1998-08-27 | 2001-02-15 | 조옥현 | Mulching material |
| JP2003531307A (en) * | 2000-03-31 | 2003-10-21 | ヨンホンイツァウツクウフンヨウシェンコンス | Paper material having multiple functions and method for producing the same |
| WO2002094935A1 (en) * | 2001-05-22 | 2002-11-28 | Daicel Chemical Industries, Ltd. | Biodegradable resin composition with controlled biodegradation rate, film, and agricultural mulch film |
| KR20010078985A (en) * | 2001-05-30 | 2001-08-22 | 최재승 | The make mulching by old paper |
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| US9441340B2 (en) * | 2012-10-22 | 2016-09-13 | Michael Dennis Krysiak | Soil stabilizer carrier |
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| JP2007195438A (en) * | 2006-01-25 | 2007-08-09 | Kohjin Co Ltd | Mulching sheet |
| WO2011074990A1 (en) * | 2009-12-16 | 2011-06-23 | Ecocover International Limited | Paper web assemblies and their uses |
| CN102337138A (en) * | 2011-05-27 | 2012-02-01 | 刘长福 | Biodegradable liquid mulch film produced from papermaking waste liquid, and production method thereof |
| CN203262126U (en) * | 2013-06-05 | 2013-11-06 | 卢文祥 | Agricultural weeding paper |
| CN103435986B (en) * | 2013-08-30 | 2015-12-02 | 华南农业大学 | A kind of residual actived sludge that utilizes is for the method for degradable mulch and mulch film |
| KR101435885B1 (en) * | 2014-02-21 | 2014-09-01 | 충남대학교산학협력단 | Manufacture of environment-friendly mulching paper with inorganic material |
| CN103858717B (en) * | 2014-03-21 | 2016-02-24 | 宋志祥 | A kind of multifunctional biodegradable mulch film and preparation method thereof |
| JP6637259B2 (en) * | 2015-06-04 | 2020-01-29 | 大王製紙株式会社 | Agricultural sheet |
| CN105178094B (en) * | 2015-06-17 | 2017-02-22 | 华南理工大学 | Agricultural degradable thermal-insulation mulch film manufacturing method |
| CN105860991A (en) * | 2016-04-19 | 2016-08-17 | 刘敏 | Agricultural liquid mulching film and production method thereof |
| CN106012689B (en) * | 2016-04-27 | 2022-01-04 | 新疆瑞新生物科技开发有限公司 | Paper-based mulching film and manufacturing method thereof |
| KR101713522B1 (en) * | 2016-09-09 | 2017-03-07 | 박승찬 | Organic coatings biodegradable korea paper mulching film |
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2018
- 2018-03-26 CN CN201880019759.0A patent/CN110557940A/en active Pending
- 2018-03-26 WO PCT/TH2018/000011 patent/WO2018182543A2/en active Application Filing
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| Publication number | Publication date |
|---|---|
| CN110557940A (en) | 2019-12-10 |
| WO2018182543A3 (en) | 2019-03-21 |
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