JPH10203884A - Excreta deposit covering material - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain a covering material as a porous fabric or its laminate with a porous polyethylene film, intended to dry and ferment livestock excreta deposit through covering the surface of the deposit therewith, with its moisture permeability, hydraulic pressure resistance and air permeability specified so as to prevent rainwater from intrusion, and promote drying and fermentation of livestock excreta deposit through covering such deposit on a paddock or the like. SOLUTION: This covering material for excreta deposit is a porous fabric itself or its laminate with a porous polyethylene film. The porous fabric is enough to be >=1,500g/m<2> .24h in moisture permeability, >=0.1kgf/cm<2> in hydraulic pressure resistance, and <=3,000s/100cc in air permeability, being in the form of split fabric made of split yarns, nonwoven fabric, woven fabric or netty product, and being pref. 10-500g/m<2> in basis weight. In the case of a laminate with a porous polyolefin film, the polyolefin film is prepared from a stock consisting of a polyolefin resin <=0.93g/cm<3> in density and <=2g/10min in melt index and an ultraviolet light absorber.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

[0001] The present invention relates to a manure sediment coating material. More specifically, dairy cows, beef cattle, sheep, goats,
The present invention relates to a covering material used for drying and fermenting manure excreted by livestock such as horses and pigs.

[0002]

2. Description of the Related Art Conventionally, excreta excreted by livestock such as dairy cows, beef cattle, sheep, goats, horses, pigs, etc. depends on their amounts, but most of the large-scale livestock farmers are (1) A method of depositing with a concrete frame next to the barn, (2) A method of transferring to the lagoon by a bucket from the side of the barn, (3) A method of transferring to the lagoon by a pipe from the barn, (4) An underground slurry tank with a pipe from the barn (5) Transfer to the compost bar from the side of the barn by a bucket, (6) Separation of solid and liquid by a machine, (7) Deposition in a wide paddock, etc. . It is considered that the solid components obtained by the methods (1) to (7) are used as compost and the liquid components are used as liquid fertilizer.

In order to commercialize and utilize solid components as compost, it is necessary to reduce the amount of liquid components and to sufficiently ferment litter such as wheat cane and rice straw, as described in (1) to (7) above. It is difficult to ferment well by the method. Also,
In (1) to (3), since it is open without a roof, odor problems such as odors splashing nearby, rainwater flows in, sap flows out, collects on the ground, and penetrates underground. There are problems such as polluting groundwater and sap flowing out into rivers to pollute and eutrophize water.

[0004] The above methods (4) and (5) have a roof, so there is no problem of odor scattering, and there is no problem that rainwater flows in and sap flows out. However, a large site is required and a building is constructed. In addition to the cost increase, the problem of odor scattering remains unsolved. In the above (6), the solid-liquid separator is expensive, and there are problems in composting solids and treating large amounts of liquid. the above
In (7), since no building is constructed, no cost is required, but there are environmental pollution problems such as odor scattering and sap outflow due to rainwater inflow.

[0005]

In view of the above situation, the present inventors have made intensive studies on a method for solving the above-mentioned problems, and as a result, the surface of the manure sediment deposited on the ground has been impregnated with water vapor and gas. However, it has been found that it is effective to coat with a special coating material that does not allow moisture to permeate, and the present invention has been completed. The objects of the present invention are as follows. 1. Provided is a covering material that covers the excrement of livestock excreta accumulated in a paddock or the like, prevents inflow of rainwater, and promotes drying. 2. Provided is a covering material which covers a sediment of livestock manure deposited in a paddock or the like and can promote fermentation of litter such as wheat cans or rice straw contained in the manure sediment.

[0006]

In order to solve the above-mentioned problems, the present invention provides a manure sediment coating for covering the surface of livestock manure sediment deposited on the ground and drying and fermenting the manure sediment. The material is a porous cloth, or a laminate of a porous polyolefin film and a porous cloth, having a moisture permeability of 1500 g / m ² · 24 hr or more, a water pressure resistance of 0.1 kgf / cm ² or more, and Air permeability is 3000s
ec / 100 cc or less.

[0007]

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, the present invention will be described in detail. 1. Porous cloth The porous cloth itself can be used as a feces sediment coating material by itself or as a laminate laminated with a porous polyolefin film described later. The porous cloth has a moisture permeability of 1500 g / m ² · 24 hr or more, a water pressure resistance of 0.1 kgf / cm ² or more, and an air permeability of 3000 s.
ec / 100 cc or less, for example, split cloth, non-woven cloth, woven cloth or mesh made of split yarn, and preferably having a basis weight of about 10 to 500 g / m ² . Among them, a nonwoven fabric is particularly preferred.

[0008] The porous cloth has air permeability, moisture permeability, flexibility and the like, and those laminated with a porous polyolefin film described later need to have adhesiveness to this film. Examples of the raw material of the porous cloth include a polyamide resin, a polyester resin, rayon, and a polyolefin resin. In order to improve the weather resistance, light resistance, durability and the like of the raw material of the porous cloth, it is preferable to mix various resin additives such as an ultraviolet absorber, a hindered amine light stabilizer and a colorant.

[0009] The non-woven fabric means a fabric (sheet) made of fibers irrespective of weaving or braiding.
It can be divided into dry method, wet method, spun bond method and the like. The dry method uses fibers with a length of 1 to 10 cm, turns the fibers into a thin sheet with a card for spinning, etc., needle punches (cling the fibers with a needle), stitch bonds (sewn with a thread), bonding (adhesive, (For example, mixed with heat-welded fibers) to obtain a material with high bulkiness and elasticity.

In the wet method, short fibers having a length of several millimeters are dispersed in water, and the fibers of a polyethylene resin are used as a binder to form a sheet using a paper machine. Has a paper shape. The spunbond method is a method of manufacturing a nonwoven fabric by directly drawing a fiber into a sheet while spinning a chemical fiber. Like a nonwoven fabric obtained by a dry method, the spunbond method is bulky, soft, and excellent in strength. The nonwoven fabric may be manufactured by any of these methods. Non-woven fabric has a weight per unit of 1
It is preferable to select from the range of 0 to 500 g / m ² , especially from 20 to 300 g / m ² .

The ultraviolet absorber which can be blended with the raw material resin for producing the nonwoven fabric is selected from a benzotriazole-based, benzophenone-based or benzoate-based ultraviolet absorber. 2- (5-methyl-2-hydroxyphenyl) benzotriazole, as a benzotriazole-based ultraviolet absorber,
2- [2-hydroxy-3,5-bis (α, α-dimethylbenzyl) phenyl] -2H-benzotriazole,
2- (3,5-di-tert-butyl-2-hydroxyphenyl) benzotriazole, 2- (3-tert-butyl-5-
Methyl-2-hydroxyphenyl) -5-chlorobenzotriazole, 2- (3,5-di-t-butyl-2-hydroxyphenyl) -5-chlorobenzotriazole,
2- (3,5-di-t-amyl-2-hydroxyphenyl) benzotriazole, 2- (2'-hydroquin-5
'-T-octylphenyl) benzotriazole and the like.

As the benzophenone type ultraviolet absorber,
2-hydroxy-4-n-octoxybenzophenone,
2,2'-dihydroxy-4-methokinebenzophenone, 2-hydroxy-4-methoxybenzophenone, p
-T-butylphenyl salicylate-2-hydroxy-
4-methoxybenzophenone, 2- (2-hydroxy-
3,5-di-t-butylphenyl) benzotriazole and the like. Benzoenone type ultraviolet absorbers include 2,4-di-t-butylphenyl-3,5-di-t.
-Butyl-4-hydroxybenzoate and the like. Among them, 2-hydroxy-4-n-octoxybenzophenone is preferable.

The hindered amine light stabilizers that can be blended include Sanol LS-770 and LS-262.
6, LS-765 (trade names, all manufactured by Sankyo), T
inuvin 144, 622, 622LD, 77
0, 120 (trade names, both manufactured by Ciba Geigy)
Chimasorb 944FL, 944LD, 1
19FL (trade names, all manufactured by Ciba Geigy), ADK STAB LA-57, LA-77, LA-62,
Same LA-67, Same LA-63, Same LA-68, Same LA-
82, LA-87 (trade names, both manufactured by Asahi Denka Co., Ltd.),
SumisorbTM-061 (trade name, manufactured by Sumitomo Chemical Co., Ltd.), Cyasorb UV-3346 (trade name, A
CC) and Goodlite UV-3034 (trade name, manufactured by Goodrich) and the like. Among them, T
Inuvin 622, 622LD (dimethyl-1- (2-hydroxyethyl) -4-hydroxy-succinate)
2,2,6,6-tetramethylpiperidine polycondensate),
Chimasorb 944FL and 944LD (poly [{6- (1,1,3,3-tetramethylbutyl) amino-1,3,5-triazine-2,4-diyl})
｛(2,2,6,6-tetramethyl-4-piperidyl)
Imino {hexamethylene {(2,2,6,6-tetramethyl-4-piperidyl) imino}]) is preferred.

The compounding amount of the ultraviolet absorber to the raw material resin for producing the nonwoven fabric is 0.01 to 100 parts by weight of the raw material resin.
5 parts by weight, 0.01 to 5 hindered amine light stabilizer
Preferably it is in the range of parts by weight. It is preferable to mix and knead the compound into the base resin before producing short fibers.

The porous cloth may be waterproofed (water-repellent), and as a waterproofing agent (water-repellent) which can be used for waterproofing, insoluble aluminum soap, paraffin,
In addition to wax, methyl hydrogen polysiloxane, dimethyl polysiloxane having a terminal OH group, a polymer compound having -CF ₃ at a terminal of a pendant chain to a polymer chain, a surfactant having a fluorocarbon as a hydrophobic group, and the like. No. These may be used alone or as a mixture of two or more.

2. Porous polyolefin film The feces sediment coating material according to the present invention may be a laminate of the porous cloth and a porous polyolefin film.
The porous polyolefin film has (A) a density of 0.9.
3 g / cm ³ or less, melt index 2 g / 10 min
100 parts by weight of the following polyolefin resin, (B) 25 to 400 parts by weight of a filler, (C) 0.1 to 10.0 parts by weight of a hindered amine-based light stabilizer, and (D) benzotriazole-based, benzophenone-based or UV absorber 0.1-1 selected from benzoate UV absorbers
It is preferable to use a resin composition composed of 0.0 parts by weight as a raw material and stretched in at least one direction.

2-1. Raw Material Resin Composition In the present invention, the polyolefin resin (A) {hereinafter simply referred to as the resin (A)} is a homopolymer of ethylene or propylene, or a copolymer of ethylene or propylene with another monomer copolymerizable therewith. Say Specifically, low-density polyethylene, linear low-density polyethylene, ethylene-vinyl acetate copolymer, density 0.910 g / cm
Examples include ultralow density polyethylene of ³ or less, polypropylene, ethylene-propylene copolymer, ethylene-propylene-diene copolymer, ethylene-methacrylate copolymer, or a mixture thereof.

[0018] Linear low density polyethylene refers to a copolymer of ethylene and another α-olefin. Other copolymerizable α-olefins include propylene, 1-butene,
1-pentene, 1-hexene, 1-octene, 1-decene, 4-methyl-11-pentene, and the like, together with 1,4-hexadiene, dicyclopentadiene,
Non-conjugated dienes such as ethylidene norbornene can also be copolymerized. The amount of the other α-olefin is 4-1
It can be selected in the range of 7% by weight.

The polyolefin resin (A) further comprises:
It is necessary that the density be 0.930 g / cm ³ or less and the melt index (MI) be 2 g / 10 min or less. When the polyolefin resin (A) is a mixture of a plurality of types having different densities, the density refers to a weighted average value of the densities of the constituent components. Preferred among the polyolefin resins (A) are 50-100 parts by weight of a linear low-density polyethylene having a density of 0.910-0.950 g / cm ³ and a density of 0.91 g.
/ Cm ³ ethylene-α-olefin copolymer of less than 50
And 0 parts by weight. Here, the melt index (MI) refers to a value measured according to Condition 4 of Table 1 of JIS K-7210, which is a cited standard of JIS K-6760.

The density (ρ) of the polyolefin resin (A) is not more than 0.93 g / cm ³ , and the density (ρ) is not more than 0.93 g / cm ³ .
If it is larger than 93 g / cm ³ , the synergistic effect of the plasticizer and the radical generator is small, and the tear strength is not improved. On the other hand, when the melt index (MI) is more than 2 g / 10 min, the tear strength of the film decreases and the molding stability decreases.

The filler (B) to be added to the polyolefin resin (A) may be either an inorganic filler or an organic filler. As inorganic fillers, calcium carbonate, talc,
Clay, kaolin, silica, diatomaceous earth, magnesium carbonate, barium carbonate, magnesium sulfate, barium sulfate,
Calcium sulfate, aluminum hydroxide, zinc oxide, magnesium hydroxide, calcium oxide, magnesium oxide,
Examples include titanium oxide, alumina, mica, asbestos powder, glass powder, shirasu balloon, zeolite, and clay silicate. Among them, calcium carbonate, talc, clay, silica, diatomaceous earth, barium sulfate, and the like are preferable.

Examples of the organic filler include cellulosic powders such as wood powder and pulp powder. These may be used alone or as a mixture. The average particle size of the filler is 3
Those having a diameter of 0 μm or less are preferable, and those having a diameter of 0.7 to 5 μm are particularly preferable. If the particle size is too large, the denseness of the pores of the stretched product will be poor, and if the particle size is too small, dispersibility in the resin will be poor and moldability will be poor.

The filler (B) is preferably surface-treated with a surface treating agent from the viewpoint of dispersibility in the resin (A) and further from the viewpoint of stretchability of the resin (A). Examples of the surface treatment agent include fatty acid or a metal salt thereof.

The hindered amine light stabilizer (C) and the ultraviolet absorber (D) to be blended with the polyolefin resin (A) are among those exemplified as those which can be blended with the raw material resin when producing the above-mentioned nonwoven fabric. Can be selected as appropriate.

If necessary, a plasticizer (E) or a radical generator (F) may be used in combination with the polyolefin resin (A) to improve the strength of the porous film, This is preferable because in the bonding step, scratching or the like is prevented. As the plasticizer (E),
Compounds having an ester bond or an amide bond in the molecule and having a molecular weight of 100 or more are preferred. When the molecular weight is small, bleeding of the plasticizer from the film is unfavorably fast. The plasticizer (E) has a boiling point at normal pressure of 200 ° C.,
Compounds having a melting point of 100 ° C. or lower are preferred. Melting point 100
If the temperature exceeds ℃, the effect of improving the tear strength by modification with a radical generator is small, and if the boiling point is not 200 ° C, smoke and foam at the time of molding processing lower the moldability and stretchability.

Specific examples of the plasticizer (E) satisfying the above physical properties include stearamide, oleamide, triisodecyl trimellitate, trioctyl trimellitate, diisodecyl phthalate, dioctyl phthalate and the like. Of these, trioctyl trimellitate and diisodecyl phthalate are preferred.

The radical generator (F) includes a half-life of 1
Those having a decomposition temperature in the range of 130 to 300 ° C. are preferred. Specific examples include dicumyl peroxide, 2,
5-dimethyl-2,5-di (t-butylperoxy) hexan, 2,5-dimethyl-2,5-bis (t-butylperoxy) -3-hexyne, α, α-bis (t-butylperoxy) Peroxides such as (isopropyl) benzene, dibenzoyl peroxide, di-t-butyl peroxide-2,5-dimethylhexane-2,5 dihydroperoxide. Among them, 2,5-
Dimethyl-2,5-bis (t-butylperoxy) -3
-Hexin.

To prepare the raw resin composition, the filler (B) is added to 100 parts by weight of the polyolefin resin (A).
25 to 400 parts by weight, and 0.1 to 10 parts by weight of a hindered amine light stabilizer (C) and an ultraviolet absorber (D). When the proportion of the filler (B) is less than 25 parts by weight, pores are not sufficiently formed in the stretched film, and the degree of porosity is reduced. When the proportion of the filler exceeds 400 parts by weight, kneadability, Poor dispersibility and film formability,
Further, the surface strength of the stretched product is undesirably reduced.

When the amounts of the hindered amine light stabilizer (C) and the ultraviolet absorber (D) are less than 0.1 part by weight,
When the coating material of the product is used for a long time, the weather resistance becomes insufficient, and when it exceeds 10 parts by weight, the bleeding after film formation becomes excessive, which is not preferable, and the effect of improving the durability is also small. The hindered amine light stabilizer (C) and the ultraviolet absorber (D) are used at a ratio of 1 to 50:
The ratio is 50 to 1, preferably 1 to 10:10 to 1.

Polyolefin resin, additives, plasticizer,
To mix the radical generator and filler, a drum,
Tumbler type mixers, ribbon blenders, Henschel mixers, super mixers and the like are used, and high-speed stirring type mixers such as Henschel mixers are desirable, and polyethylene is usually 10 to 150 mesh, especially 20 to 6 meshes.
Preferably, it is supplied in the form of a 0 mesh powder.
For kneading the obtained mixture, a well-known kneading device such as a screw extruder, a twin-screw extruder, a mixing roll, a Banbury mixer, and a twin-screw kneader can be used.

2-2. Production of Porous Polyolefin Film To produce a porous polyolefin film, a polyolefin resin (A), a filler (B), a hindered amine light stabilizer (C), an ultraviolet absorber (D), and if necessary, a plasticizer. Ingredient (E), radical generator (F), etc. are blended and mixed in the above-mentioned ratios, and further, if necessary, other resin additives such as a coloring agent, an antistatic agent, and a fluorescent agent are blended, and then melted and kneaded. Then, it is formed into pellets and then formed by an inflation method to obtain an unstretched film.

According to the method described above, the polyolefin resin (A) is kneaded with the radical generator (F) under heating (preferably at a temperature not lower than the temperature at which the half-life of the radical generator is 10 minutes). A cross-linking reaction by the radical generator occurs, and the polyolefin resin (A) is intermolecularly coupled to increase the high molecular weight component and to obtain a modified polymer having a reduced melt index. This modified polymer is easier to orient in the transverse direction at the time of inflation molding than the polymer before modification, and the film thus obtained, when stretched, has significantly improved tensile strength and impact strength. It is preferred.

The porous polyolefin film is usually formed from an unstretched film having a thickness of 10 to 200 μm or an unstretched film having a thickness of 200 to 400 μm by inflation molding or T-die molding from the resin composition prepared by the above method. A sheet can be produced, and then these unstretched films or sheets can be produced by a stretching method. In the inflation molding method, the blow-up ratio (BUR) is usually selected in the range of 2 to 8.

The unstretched film or sheet produced by the inflation molding method is then uniaxially stretched at least in the longitudinal direction (the direction in which the film is taken off). When uniaxially stretching an unstretched film or sheet, usually
Although the roll stretching method is adopted, a method in which the uniaxial direction (drawing direction) is emphasized by the tubular stretching method may be used. For stretching, a single-stage stretching system or a multi-stage stretching system of two or more stages may be used. In addition, even in an unstretched film manufactured by the T-die molding method, at least a longitudinal uniaxial stretching is performed, and if necessary, a stretching is performed in a transverse direction (a direction perpendicular to a film taking-out direction).

The temperature conditions for stretching an unstretched film or sheet vary depending on the type of raw resin, the type and amount of additives, the thickness of the film or sheet, etc.
It is selected in the range of 00 ° C., and the stretching ratio is 1.
It is selected in the range of 2 to 8 times. When the heat treatment is performed after the stretching step, the dimensional accuracy of the obtained porous polyolefin film can be stabilized. The porous polyolefin film thus obtained has a thickness of 100
μm or less, particularly preferably in the range of 15 to 50 μm.

2-3. Laminate Lamination of the porous polyolefin film and the porous cloth can be performed by (i) a method using an adhesive, or (ii) a method using thermal bonding. Regardless of which method is used, the porous polyolefin film and the porous cloth are
It is preferable to bond them so that each bonding area is in the range of 5 to 60% of the facing surface. If the bonding area is less than 5%, the obtained coating material has few bonding parts, so that the bonded part peels off during use, and if the bonding area exceeds 60%, the bonding area is too large and Breathable, breathable,
None of them is preferable because the flexibility is lowered.

The method for adhering the porous polyolefin film and the porous cloth is not particularly limited. However, in order to adhere using the adhesive (i), a hot melt adhesive, a pressure-sensitive adhesive or the like is used. Is preferred. Examples of the hot melt adhesive that can be used at this time include resins such as polyamide, polyester and polyolefin, tapes and webs. In the method of (ii) by thermal bonding, the surface of the porous cloth film is heated, and when the material of the cloth layer is a thermoplastic resin, the material is heated and melted, and pressed and bonded to the porous polyolefin film. Method. Regardless of which bonding method is used, the bonding surface is striated,
It is preferable to use any of a dot shape, a grid shape, a random shape, and the like.

3. Physical properties of the covering material The feces sediment covering material according to the present invention has a moisture permeability of 1500 g / whether it is a porous cloth only or a laminated body of a porous cloth and a porous polyolefin film.
m ² · 24 hr or more. Here, the moisture permeability means a value measured according to JISZ-0208. When the moisture permeability is less than 1500 g / m ² · 24 hr, when the coating material is used for coating the manure sediment, the water vapor evaporated from the manure sediment is not sufficiently passed, and the function of the moisture permeability is sufficiently exhibited. Not preferred. The upper limit of the water vapor transmission rate is about 20,000 g / m ² · 24 hr. If the upper limit is exceeded, the water vapor evaporated from the manure is sufficiently passed, but rainwater and the like are easily transmitted, which is not preferable. A particularly preferred range of the moisture permeability is 2500 to 10000 g / m ² · 24 hr.
Range.

The feces sediment covering material according to the present invention needs to have a water pressure resistance of 0.1 kgf / cm ² or more. Here, the water pressure resistance means a value measured according to JIS L-1092B method. Water pressure resistance is 0.1kgf / cm ²
If it is less than this, it is not preferable because rainwater or water droplets penetrate the coating material and reach the manure deposit, and the purpose of coating with the coating material is not achieved. Particularly preferred water pressure resistance is 0.7-20.
kgf / cm ² . If the water pressure exceeds 20 kgf / cm ² , the moisture permeability and the air permeability are undesirably impaired.

The feces sediment coating material according to the present invention must have an air permeability of 3000 sec / 100 cc or less. Here, the air permeability means a value measured according to JIS Z-1096. Air permeability is 3000 sec / 1
If it exceeds 00 cc, air permeability is so large that not only water vapor in the air but also water droplets easily pass, which is not preferable.
The lower limit of the air permeability is about 30 sec / 10 cc. If the air permeability is less than this value, when the coating material is used for coating manure sediment, it is difficult for air to pass therethrough. However, it is not preferable because it lowers the activity of aerobic bacteria. A particularly preferable range of the air permeability is 50 to 2000 sec.
c / 100 cc.

5. How to Use the Coating Material In order to coat manure sediment with the coating material according to the present invention, the manure sediment may be coated on the manure sediment deposited by a conventional method so that rainwater does not flow. That is, (1)
Above the excrement deposited on the concrete frame constructed next to the barn, (2) Above the excrement deposited on the lagoon next to the barn, (3) Above the excrement deposited on the large paddock, etc. May be coated. In order to ferment manure sediment uniformly and promote uniform drying of water, sometimes,
It is preferable to switch the excrement of manure by peeling off the covering material.

The manure sediment covering material having the above-mentioned physical properties is waterproof, has good moisture permeability, and has good air permeability. Therefore, when the covering material is used for covering manure sediment, it has evaporated from the manure sediment. Sufficiently transmits water vapor, but does not transmit rainwater or water droplets, so sap does not flow out of manure sediments, penetrates underground and contaminates groundwater, flows into rivers and contaminates river water, eutrophication Can be reduced. In addition, since the fermentation odor of the manure sediment can be prevented from scattering, the problem of odor pollution can be solved. The manure sediment coated with the covering material allows water vapor or gas generated by fermentation to be scattered through the pores of the covering material and air required for fermentation to be taken in from the pores of the covering material. When the sediment is switched, fermentation and ripening can be promoted. The manure sediment coated with the manure sediment coating material according to the present invention, fermented, aged, and dried can be fertilized as compost of various vegetables, fruit vegetables, root vegetables, fruit trees, flowers and the like.

[0043]

EXAMPLES The present invention will be described below in detail with reference to examples, but the present invention is not limited to the following description unless it exceeds the gist.

<Production of porous polyethylene film> Linear low-density polyethylene @ melt index (MI) =
1.0 g / 10 min, flow ratio = 19, density (ρ) = 0.
921 g / cm ³ , copolymerization component = 1-butene, copolymerization amount =
80% by weight of 10% by weight, melting point = 120 ° C., pulverized into a powder passing through a 40-mesh sieve, and an ethylene-propylene copolymer {Nippon Synthetic Rubber Co., Ltd., EP07, MI = 0 0.4 g / 10 min, ρ = 0.8
6 g / cm ³ , which was pulverized into a powder form and passed through a 40-mesh sieve (｝ 80 parts by weight), was mixed with a Henschel mixer. The MI of the obtained resin mixture was 0.1.
The density was 8 g / 10 min and the density was 0.909 g / cm ³ .

The resin mixture was added to Tinuvin 62
2.5 parts by weight of 2LD (hindered amine light stabilizer), 1.8 parts by weight of Cyasorb UV-531 (ultraviolet absorber), 1.5 parts by weight of zinc stearyl phosphate (acid phosphate ester), dioctyl phthalate ( 4 parts by weight of a plasticizer) and 0.024 parts by weight of 2,5-dimethyl-2,5-bis (t-butylperoxy) -3-hexyne (radical generator) were added and mixed with stirring. Furthermore, calcium carbonate (average particle size = 1.
2 μm, surface-treated with a fatty acid) was added to obtain 200 parts by weight of a raw resin mixture, which was then mixed with a twin-screw kneader DSM.
(Double ScrewMix made by Japan Steel Works, Ltd.)
The mixture was melted and kneaded according to r) to obtain pellets.

Using the pellets as a raw material, the cylinder temperature was adjusted to 170-190-210-2 by a 40 mmφ extruder.
30 ° C, head and die temperature 200 ° C, diameter 1
With a 00 mm die, the take-up speed is 8 m / min, B
UR = 3, frost line height = 700 mm, folding diameter = 4
Under a condition of 71 mm, a film having a thickness of 70 μm was obtained by an inflation molding method. This film is slit in the take-off direction, and the stretching temperature is 60 by a roll stretching machine.
° C, stretching ratio = 2.0 times, speed after stretching = 11.0 m / mi
Uniaxial stretching was performed under the conditions of n to obtain a porous polyethylene film having a thickness of 35 μm.

<Preparation of Porous Cloth and Laminate> Nylon spunbonded nonwoven fabric (basis weight 15 g /
m ² ), hot-melt resin was applied on this non-woven fabric in a staggered manner, and the above-mentioned porous polyethylene film was bonded to obtain a laminate (coating material) according to the present invention. The moisture permeability of this laminate measured in accordance with JIS Z-0208 was 3800 g / m ² · 24 hr.
The air permeability measured according to -1096 is 630 sec /
It was 100cc.

<Coating test of manure sediment-1> In the Kitami district of Hokkaido, a sediment in which a high-moisture-containing manure was conically deposited on a paddock was covered with the above-mentioned laminate, and the other was not covered, and was sometimes turned back. Was carried out to measure the change in moisture of the sediment, the size of the sediment, and the like. Table 1 shows the measurement results.

[0049]

[Table 1]

From the coating test-1, the following became clear. (1) The manure sediment covered with the laminate prevents rainwater from entering from the outside and allows water vapor evaporated from the sediment to be scattered. Drying of the surface progressed, and it was possible to raise the surface, so that the deposition area could be reduced. (2) On the other hand, manure sediment not covered with the laminate,
When there was no rainfall, drying proceeded. However, during rainfall, rainwater penetrated the sediment and the water content increased, and the area of the sediment could not be reduced.

<Coating test of manure sediment-2> A sediment (60 m) in which bark compost was conically deposited in the Kitami area of Hokkaido
² × 2m) were prepared, one was covered with the above laminate, and the other was not covered, occasionally turned back,
Moisture, PH, electric conductivity ｛EC (Milli-Siemens = m
s)｝, total carbon content (TC), total nitrogen content (TN), and other fertilizer components were analyzed. Table 2 shows the results.

[0052]

[Table 2]

From Table 2, the following becomes clear. (1) The manure sediment coated with the laminate has a decreasing water content over time and does not increase because the rainwater does not penetrate. (2) Since the manure sediment coated with the laminate increases the salt due to the fermentation of the manure sediment progressing with time,
The value of the electric conductivity (EC) is gradually higher than that of the uncoated section. (3) The manure sediment coated with the laminate does not reduce the effective components of compost and is not washed away by rainwater.

[0054]

The present invention has the following particularly advantageous effects, and its industrial value is extremely large. 1. The manure sediment coating material according to the present invention has moisture permeability and air permeability both within an appropriate range, so that water vapor from manure sediment is scattered, but rainwater is not allowed to enter, so that manure sediment is not covered. There is no outflow of sap and it is possible to solve the problem of environmental pollution such as river and groundwater pollution caused by the sap of the conventional manure sediment. 2. When the manure sediment is coated with the manure sediment coating material according to the present invention, the fermentation of the manure sediment is promoted, and the active ingredient when used as a compost is prevented from infiltrating rainwater. High utility value can be obtained.

3. Coating material for manure deposits according to the present invention,
When used, it is only necessary to coat the manure deposits accumulated in the paddock, and therefore, it is extremely convenient to dry manure without constructing equipment such as a special structure. 4. The covering material of the manure deposit according to the present invention is excellent in strength because it is a porous cloth or a laminate of a porous cloth and a porous polyolefin film, and is deposited to switch the manure deposit. It is hard to break even if it is peeled off from the object or repeated the coating operation, and can be used for a long time.
In particular, in the case of a laminate of a porous cloth and a porous polyolefin film, it is preferable to add a combination of various resin additives to the polyolefin film since the weather resistance can be greatly improved.

──────────────────────────────────────────────────続 き Continued on front page (51) Int.Cl. ⁶ Identification code FI D06N 7/00 D06N 7/00

Claims (3)

[Claims] 1. A manure sediment coating material for covering the surface of manure sediment of livestock deposited on the ground and drying and fermenting the manure sediment, comprising a porous cloth or a porous polyolefin film and a porous polyolefin film. A laminate with a textured cloth,
Moisture permeability is 1500 g / m ² · 24 hours or more, and water pressure resistance is 0.
1 kgf / cm ² or more and air permeability of 3000 sec
/ 100 cc or less, excrement sediment covering material characterized by the following. 2. The manure sediment coating material according to claim 1, wherein the porous cloth is selected from a split cloth, a nonwoven cloth, a woven cloth and a mesh, and has a basis weight in the range of 10 to 500 g / m ² . 3. The porous polyolefin film,
(A) 100 parts by weight of a polyolefin resin having a density of 0.93 g / cm ³ and a melt index of 2 g / 10 min or less, (B) 25 to 400 parts by weight of a filler, and (C) a hindered amine light stabilizer 0.1. A resin composition comprising from 0.1 to 10.0 parts by weight and 0.1 to 10.0 parts by weight of an ultraviolet absorber selected from (D) a benzotriazole-based, benzophenone-based or benzoate-based ultraviolet absorber; The manure sediment covering material according to claim 1, which is manufactured by stretching at least in one axial direction.