JP2000316393A - Vinyl chloride resin film for agriculture - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a vinyl chloride resin film for agriculture enabling an easy winding work, and excellent in antifog property in the initial period of spreading and for long term. SOLUTION: This vinyl chloride resin film for agriculture is prepared by compounding vinyl chloride resin film with (A) methylenebisstearoamide and (B) ethylenebislaurylamide. Herein, the total amount of the (A) and (B) is 0.05-2 pts.wt. based on 100 pts.wt. of the vinyl chloride resin, and the weight ratio of the (A) to the (B) is in the range of (20 to 1) to (1 to 0.9).

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vinyl chloride resin film for agricultural use. More specifically, the present invention relates to a vinyl chloride resin film for agricultural use which is less likely to adhere to each other when the films are overlapped with each other and has excellent initial and long-term antifogging properties after outdoor exposure.

[0002]

2. Description of the Related Art In recent years, in order to efficiently cultivate useful plants, promotion cultivation in a house or a tunnel has been actively performed. As a material for covering the house or the tunnel, a vinyl chloride resin film is frequently used because of its excellent weather resistance, transparency, heat retention and the like.
However, since the soft vinyl chloride resin film is soft and elastic, it has the advantage that it can be easily stretched into any shape of house or tunnel, but it adheres when the films overlap. There is a drawback that the property of matching (such as stickiness) is larger than that of polyethylene film or ethylene-vinyl acetate. The disadvantage is that when the film is rolled up and rolled up the side of the house and in the valley of the house and ventilated, and when the film is rolled down, it is very difficult to avoid the sun being strong and the inside of the house becoming hot. It is a problem because it takes time. In order to solve this drawback, Japanese Patent Application Laid-Open No. 58-69240 proposes a method of adding a specific amide compound, but the workability of winding and lowering has not been sufficiently satisfactory.

[0003]

SUMMARY OF THE INVENTION The present invention relates to
An object of the present invention is to provide a vinyl chloride resin film for agricultural use which can be easily unwound and has excellent antifogging properties at the initial stage of expansion and for a long period of time.

[0004]

Means for Solving the Problems The present inventors have solved the above-mentioned problems by blending a specific antiblocking agent with a vinyl chloride resin. Thus, the gist of the present invention is that (A) methylenebisstearamide and (B) ethylenebislauramide are added to a vinyl chloride resin film in the total amount of (A) and (B). It is 0.05 to 2 parts by weight based on 100 parts by weight of the resin, and the weight ratio of (A) to (B) is from 20: 1 to 1: 1.
It is present in agricultural vinyl chloride resin films blended in the range of 9.

[0005]

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, the present invention will be described in detail.
In the vinyl chloride resin film composition according to the present invention,
(A) Methylene bis stearamide and (B) ethylene bis lauryl amide are blended. In the present invention, methylene bisstearamide having a melting point of 140 to 146 ° C is blended as the component (A), and ethylenebislauramide having a melting point of 156 to 160 ° C is blended as the component (B). The compounding amount of methylene bis stearamide as the component (A) and ethylene bis lauryl amide as the component (B) is such that the total amount of the components (A) and (B) is 0 with respect to 100 parts by weight of the vinyl chloride resin. .
It is preferably in the range of 0.5 to 2 parts by weight. When the total amount of (A) and (B) is less than this range, the workability of winding and unwinding is not sufficiently excellent, and when the total amount is large, the added material after film formation is ejected. And the problem of impairing the antifogging property occurs, which is not preferable. Of the above ranges, a range of 0.05 to 1.0 part by weight is particularly preferred. Further preferably, 0.1 to 1.
The range is 0 parts by weight.

The mixing ratio of the components (A) and (B) is preferably such that the weight ratio of (A) to (B) is in the range of 20: 1 to 1: 0.9. Within this range, an effect of preventing stickiness is exhibited. If the ratio is out of this range, there is a problem that a substance added after forming the film spouts out or hinders the antifogging property, which is not preferable. It is particularly preferable that the mixing ratio be in the range of 10: 1 to 1: 0.8.

In the present invention, the vinyl chloride resin refers to a vinyl chloride or a mixture of vinyl chloride and a comonomer copolymerizable therewith, such as a suspension polymerization method, a bulk polymerization method, a fine suspension polymerization method or an emulsion polymerization method. Inclusive of all those manufactured by the method of (1). Examples of the comonomer include vinyl esters such as vinyl acetate, vinyl propionate and vinyl laurate; acrylates such as methyl acrylate, ethyl acrylate and butyl acrylate; methacrylates such as methyl methacrylate and ethyl methacrylate; and dibutyl. Maleates such as maleate and diethyl maleate; fumaric esters such as dibutyl fumarate and diethyl fumarate; vinyl methyl ether; vinyl butyl ether;
Vinyl ethers such as vinyl octyl ether; vinyl cyanides such as acrylonitrile and methacrylonitrile; α-olefins such as ethylene, propylene and styrene; vinylidene chloride and vinylidene chloride other than vinyl chloride such as vinyl bromide or halogenated. Vinyls, diallyl phthalate, polyfunctional monomers such as ethylene glycol dimethacrylate, etc., of course, comonomer,
It is not limited to the above. The polymerization degree of the vinyl chloride resin can be selected in the range of 700 to 2500, and is preferably 700 to 1800.

Further, the vinyl chloride resin film composition according to the present invention comprises a plasticizer, an anti-fog agent, an anti-fog agent, a lubricant, a heat stabilizer, an ultraviolet absorber, a light stabilizer, an organic metal phosphate,
Inorganics, antioxidants, stabilizing aids, antistatic agents, fungicides,
Various additives such as an antialgal agent and a coloring agent can be blended. As the plasticizer, those commonly used for plasticizing vinyl chloride resins are used. For example, if the molecular weight is 250
The following low molecular weight polyhydric alcohols, phthalic acid derivatives, isophthalic acid derivatives, adipic acid derivatives, maleic acid derivatives, citric acid derivatives, itaconic acid derivatives, oleic acid derivatives, ricinoleic acid derivatives, and the like can be mentioned. These plasticizers may be used alone or in combination of two or more. The blending amount of these plasticizers is selected from the range of 30 to 60 parts by weight based on 100 parts by weight of the vinyl chloride resin in order to balance the flexibility and strength of the film.

Other examples include an epoxy plasticizer and an organic phosphate. As an epoxy plasticizer,
There are epoxidized vegetable oils such as epoxidized soybean oil and epoxidized linseed oil and epoxy resins. These epoxy plasticizers are added in an amount of 0.1 to 100 parts by weight of the resin.
The amount is from 0.01 to 10 parts by weight, preferably from 0.1 to 5 parts by weight. The compounding amount of the organic phosphate plasticizer is
An appropriate amount is in the range of 1 to 10 parts by weight, particularly 2 to 8 parts by weight, based on 100 parts by weight of the vinyl chloride resin.

As the antifogging agent, nonionic surfactants are preferable, and ether-type surfactants such as polyoxyethylene ether, polyoxyethylene alkylaryl ether and polyoxyethylene polyoxypropylene ether, and polyhydric alcohols And ester type such as polyoxyethylene ether of glycerin ester and polyoxyl ethylene ether of sorbitan ester. Hereinafter, suitable nonionic surfactants will be exemplified.

(A) A partial ester of a polyhydric alcohol such as sorbitan, sorbitol, mannitol, mannitol, glycerin, diglycerin and a fatty acid having 12 to 22 carbon atoms (b) The alkylene oxide is ethylene oxide or propylene oxide, The addition mole number is 1 to 20 mol, and the polyhydric alcohol is sorbitan, sorbitol, mannitol, mannitol, glycerin, diglycerin,
A mixture of a fatty acid ester (c), (a) and (b) of a polyoxyalkylene polyhydric alcohol having a fatty acid having 12 to 22 carbon atoms.

These mixtures are obtained as a mixture of monoester, diester and triester of polyhydric alcohol. Generally, an ester mixture having a high content of the diester component is preferred. The blending amount of the nonionic surfactant is selected from the range of 0.5 to 5 parts by weight based on 100 parts by weight of the vinyl chloride resin. In particular, 1.0 to 3.0 parts by weight is appropriate.

[0013] Examples of the antimisting agent include a fluorine-based surfactant. Specifically, the C of the hydrophobic group of a normal surfactant
Is a surfactant in which part or all of H bonded to is substituted with F, particularly a surfactant containing a perfluoroalkyl group or a perfluoroalkenyl group. The blending amount of the fluorine-based surfactant is 1 vinyl chloride resin.
0.01 parts by weight or more and 0.5 parts by weight or less per 100 parts by weight is sufficient, and the preferable range of the compounding amount is 0.02 to 0.1 part by weight.
2 parts by weight.

Examples of the lubricant or heat stabilizer include chelators such as fatty acid lubricants, fatty acid amide lubricants, ester lubricants, polyethylene wax, liquid paraffin, and organic phosphite compounds which are generally used for agricultural films; And β-diketone compounds. As the β-diketone compound, dibenzoylmethane,
Preferred are methoxybenzoyl benzoylmethane, chlorobenzoyl benzoylmethane, palmitylbenzoylmethane and the like. The amount of these lubricants and heat stabilizers is
In the range from 0.01 to 2.0 parts by weight, in particular from 0.04 to 1.
0 parts by weight is preferred.

The ultraviolet absorber may be any one which is usually blended in an agricultural vinyl chloride film, and includes various ultraviolet absorbers such as benzotriazole, benzophenone, salicylate, hydroquinone and cyanoacrylate. Can be For example, Japanese Patent Publication No. 62-38
No. 143, column 27, line 9 to column 9, line 34; and JP-B-62-53543, column 7, lines 13 to 36. Agents and benzophenone ultraviolet absorbers are preferred. Specifically, the following are mentioned.

2- (2'-hydroxyphenyl) benzotriazole, 2- (2'-hydroxy-5'-methylphenyl) benzotriazole, 2- (2'-hydroxy-5), which are benzotriazole ultraviolet absorbers
-Methylphenyl) -5-carboxylic acid butyl ester benzotriazole, 2- (2'-hydroxy-5'-methylphenyl) -5,6-dichlorobenzotriazole, 2- (2'-hydroxy-5'-methyl Phenyl)
-5-ethylsulfonebenzotriazole, 2- (2 ′
-Hydroxy-5'-t-butylphenyl) -5-chlorobenzotriazole, 2- (2'-hydroxy-5 '
-T-butylphenyl) benzotriazole, 2-
(2'-hydroxy-5'-aminophenyl) benzotriazole, 2- (2'-hydroxy-3 ', 5'-dimethylphenyl) benzotriazole, 2- (2'-hydroxy-3', 5'-dimethyl Phenyl) -5-methoxybenzotriazole, 2- (2′-methyl-4′-
Hydroxyphenyl) benzotriazole, 2- (2 ′
-Stearyloxy-3 ', 5'-dimethylphenyl)
-5-methylbenzotriazole, 2- (2'-hydroxy-5-carboxylic acid phenyl) benzotriazole ethyl ester, 2- (2'-hydroxy-3'-methyl-5'-t-butylphenyl) benzotriazole, 2
-(2'-hydroxy-3 ', 5'-di-t-butylphenyl) -5-chlorobenzotriazole, 2- (2'
-Hydroxy-3'-t-butyl-5'-methylphenyl) -5-chlorobenzotriazole, 2- (2'-hydroxy-5'-methoxyphenyl) benzotriazole, 2- (2'-hydroxy-3 ' , 5'-Di-t-butylphenyl) -5-chlorobenzotriazole, 2-
(2′-hydroxy-5′-cyclohexylphenyl)
Benzotriazole, 2- (2′-hydroxy-4 ′,
5'-dimethylphenyl) -5-carboxylic acid benzotriazole butyl ester, 2- (2'-hydroxy-
3 ', 5'-dichlorophenyl) benzotriazole,
2- (2'-hydroxy-4 ', 5'-dichlorophenyl) benzotriazole, 2- (2'-hydroxy-
3 ', 5'-dimethylphenyl) -5-ethylsulfonebenzotriazole, 2- (2'-hydroxy-4'-
Octoxyphenyl) benzotriazole, 2- (2 ′
-Hydroxy-5'-methoxyphenyl) -5-methylbenzotriazole, 2- (2'-hydroxy-5'-
Methylphenyl) -5-carboxylate benzotriazole, 2- (2′-acetoxy-5′-methylphenyl) benzotriazole and the like.

A benzophenone ultraviolet absorber, 2
-Hydroxy-4-methoxybenzophenone, 2,4-
Dihydroxybenzophenone, 2-hydroxy-4-n
-Octoxybenzophenone, 2-hydroxy-4-methoxy-2'-carboxybenzophenone, 2,2'-
Dihydroxy-4,4'-dimethoxybenzophenone,
2-hydroxy-4-benzoyloxybenzophenone, 2,2'-dihydroxy-4-methoxybenzophenone, 2-hydroxy-4-methoxy-5-sulfonebenzophenone, 2,2 ', 4,4'-tetrahydroxybenzophenone, , 2'-dihydroxy-4,4'-
Dimethoxybenzophenone, 2-hydroxy-5-chlorobenzophenone, bis- (2-methoxy-4-hydroxy-5-benzoylphenyl) methane and the like.

The ultraviolet absorbers can be used alone or in combination of two or more. The compounding amount is in the range of 0.01 to 3.0 parts by weight, particularly preferably 0.02 to 2.0 parts by weight, per 100 parts by weight of the vinyl chloride resin.

As the light stabilizer, there can be used various compounds which are usually compounded in agricultural films. For example, hindered amine compounds can be used. Specifically, JP-A-6-155680, No. 5 To 19 pages. These light stabilizers may be used alone or in combination of two or more. The amount is
0.05 to 5.0 per 100 parts by weight of vinyl chloride resin
The range of parts by weight, particularly 0.1 to 2 parts by weight, is preferred.

As the metal salt of organic phosphate, salts of zinc, calcium, barium, magnesium, cobalt or strontium with various organic phosphoric acids are used. Specifically, JP-A-2-30529, page 9, line 9 to line 11
The organic phosphoric acid metal salts described on the last line of the page can be mentioned. These metal organic phosphates may be used alone or in combination of two or more. The compounding amount is in the range of 0.05 to 5.0 parts by weight, particularly preferably 0.1 to 2 parts by weight, per 100 parts by weight of the vinyl chloride resin.

In the present invention, an inorganic substance that absorbs in the infrared region can be blended for the purpose of improving heat retention. Specifically, the following are mentioned. Magnesium carbonate,
Magnesium silicate (talc), silicon oxide, aluminum oxide, barium sulfate, calcium sulfate, magnesium hydroxide, aluminum hydroxide, aluminum hydroxide, calcium hydroxide, metal phosphate, hydrotalcites (hydrous or anhydrous) Aluminum / magnesium basic carbonate); aluminum / zinc basic carbonate lithium carbonate-aluminum hydroxide inclusion compound, and the like. Of these, aluminum hydroxide, magnesium hydroxide,
Silicon oxide, magnesium carbonate, and hydrotalcites are particularly preferable because they do not decrease the transparency of the film. One or more of these inorganic substances can be added, and the compounding amount is preferably in the range of 0.5 to 10 parts by weight, particularly preferably in the range of 2 to 10 parts by weight per 100 parts by weight of the vinyl chloride resin. .

As compounds usable as antioxidants, phenolic and sulfuric antioxidants can be used, and specifically, 2,6-di-butyl-4-methylphenol-
2,2'-methylenebis (6-tert-butyl-4-
Ethylphenol), dilaurylthiodipropionate and the like. These antioxidants can be used alone or in combination of two or more.

Compounds that can be used as a stabilizing aid include triphenyl phosphite, dioctyl phenyl phosphite, tris (nonylphenyl) phosphite, diphenyl indecyl phosphite, trilauryl trithio phosphite, diphenyl acid phosphite and the like. Can be given. These stabilizing aids can be used alone or in combination of two or more.

Examples of the antistatic agent include polyoxyethylene alkylamine, polyglycol ether, p-
And sodium styrenesulfonate. As the fungicide and the anti-algal agent, various compounds generally used in agricultural vinyl chloride films can be used.
Examples thereof include organic nitrogen compounds, and specific examples thereof include imidazole derivatives, anilide derivatives, urea derivatives, ammonium derivatives, triazine derivatives, and phthalimide derivatives. Examples of usable coloring agents include phthalocyanine blue, phthalocyanine green,
Hansa Yellow, Alizarin Lake, titanium oxide, zinc white, permanent red, quinacridone, carbon black and the like can be mentioned. These colorants can be used alone or in combination of two or more.

The above various resin additives can be selected in a range that does not deteriorate the properties of the film, usually in a range of 5 parts by weight or less based on 100 parts by weight of the vinyl chloride resin.
To blend the resin additives into the vinyl chloride resin, weigh each required amount, and use a ribbon blender, Banbury mixer,
What is necessary is just to use a super mixer and other conventionally known compounding machines and mixers.

In order to form a film of the resin composition thus obtained, a method known per se, for example, a melt extrusion method (including a T-die method and an inflation method),
A known method such as a calendering method or a solution casting method may be used. The thickness of the film is 0.03-
0.3 mm range, preferably 0.05-0.2 mm
It is preferable to set it in the range. If it is thinner than 0.03 mm,
The film is not strong enough to break easily, 0.3m
If the thickness is larger than m, the operations such as cutting and bonding are adversely affected. The agricultural resin film of the present invention may have a lattice shape, a stripe shape, or a fine uneven pattern (texture pattern) on at least one surface of the surface of the base film.

In order to further improve durability and dust resistance, it is preferable to form an acrylic resin film on one surface of the agricultural vinyl chloride resin film according to the present invention. As the acrylic resin to be used, hydroxyalkyl (meth) acrylate is 5 to 40% by weight,
A polymer obtained by copolymerizing 0 to 20% by weight of an α, β-unsaturated carboxylic acid containing one or more carboxyl groups and another vinyl monomer copolymerizable therewith is preferred.

Examples of the hydroxyalkyl (meth) acrylate include hydroxymethyl acrylate, hydroxymethyl methacrylate, 2-hydroxyethyl acrylate, 2-hydroxyethyl methacrylate, 2-hydroxypropyl acrylate, 2-hydroxypropyl methacrylate, 3-hydroxypropyl acrylate, 3-hydroxypropyl methacrylate, 2-hydroxybutyl acrylate, 2-hydroxybutyl methacrylate, 4-hydroxybutyl acrylate, 4-
Examples thereof include hydroxybutyl methacrylate, 2-hydroxypentyl acrylate, 2-hydroxypentyl methacrylate, 6-hydroxyhexyl acrylate, and 6-hydroxyhexyl methacrylate.

These hydroxyalkyl (meth) acrylate compounds make it easy for the resulting acrylic resin to dissolve in an organic solvent, improve the adhesion between the acrylic resin and the base vinyl chloride resin film, and further improve the stain on the film surface. It is a component that greatly contributes to the action of suppressing the migration of the plasticizer that comes out. The ratio of the hydroxyalkyl (meth) acrylate in the acrylic resin is 5% by weight.
When the amount is less than the above, the effect of improving the solubility with the organic solvent, the adhesion to the base film and the durability cannot be sufficiently exhibited. On the other hand, when the amount is more than 40% by weight, the cost becomes high and the cost increases. The effect obtained is not great and is not preferred.

The α, β-unsaturated carboxylic acid having one or more carboxyl groups in the molecule includes acrylic acid, methacrylic acid, itaconic acid, maleic acid, maleic anhydride, aconitic acid, fumaric acid, Crotonic acid, itaconic acid and the like. When these compounds are used in combination with the hydroxyalkyl (meth) acrylate, the adhesion and durability between the acrylic resin and the base film are improved. The use amount of these is preferably 0.5 to 20% by weight. If it is more than this, the property that the films adhere to each other when the film is moistened with moisture (the blocking property when wet) is undesirably enhanced.

Other vinyl monomers copolymerizable with the hydroxyalkyl (meth) acrylate and the α, β-unsaturated carboxylic acid include alkyl (meth) acrylate or a mixture thereof with alkenylbenzene. Is raised. Examples of the alkyl (meth) acrylate include methyl acrylate, ethyl acrylate, n-propyl acrylate, isopropyl acrylate, n-butyl acrylate, 2-ethylhexyl acrylate, and the like. Decyl acrylate, methyl methacrylate, ethyl methacrylate, methacrylic acid
Examples thereof include n-propyl ester, isopropyl methacrylate, n-butyl methacrylate, 2-ethylhexyl methacrylate, and decyl methacrylate, and are generally acrylic having 1 to 20 carbon atoms in the alkyl group. Acid alkyl esters and / or alkyl esters of methacrylic acid having 1 to 20 carbon atoms in the alkyl group are used.

The alkenylbenzene used in the present invention includes, for example, styrene, α-methylstyrene, vinyltoluene and the like. When a monomer comprising a mixture of such an alkenylbenzene and an alkyl (meth) acrylate is used, it usually varies depending on the amount of the α, β-ethylenically unsaturated carboxylic acid to be used. Use ratio of alkyl acrylate of 10
% By weight or more.

In particular, the acrylic resin of the present invention comprises a monomer comprising a mixture of the above-mentioned alkyl (meth) acrylate and a mixture thereof with alkenylbenzene in an amount of from 40 to 60.
What contains by weight is preferable. When such an acrylic resin is subjected to a surface treatment on a base vinyl chloride resin film, another resin compatible with the acrylic resin can be mixed for the purpose of improving the adhesion to the film. As the other resin, a vinylidene fluoride resin, an acrylic resin having a perfluoroalkyl group in a side chain, a cellulose acetate butyrate resin, a silicone resin, and the like are particularly effective.

In order to polymerize the acrylic resin, a predetermined amount of each monomer is combined, charged together with an organic solvent into a polymerization vessel, a polymerization initiator and, if necessary, a molecular weight regulator are added, and the mixture is heated with stirring. Good.

The acrylic resin film formed on one side of the vinyl chloride resin film is preferably applied by dissolving the acrylic resin in the above-mentioned organic solvent. To form a coating of the acrylic resin on the surface of the vinyl chloride resin film, the acrylic resin is dissolved in an organic solvent, and spray coating, roll coating, gravure coating, reverse coating, and dip coating are performed. In addition to the above, it is preferable to apply and dry by various known coating methods such as a screen printing method and a flexographic printing method. Available drying methods include, for example, hot air drying, infrared drying, far infrared drying and the like. The drying temperature is preferably a temperature at which the organic solvent is scattered, that is, the boiling point of the organic solvent in which the acrylic resin is dissolved. The shorter the drying time, the better. Therefore, it is preferable to dry at a temperature equal to or higher than the boiling point of the organic solvent in the shortest possible time.

The thickness of the acrylic resin film formed on the surface of the base film depends on the thickness of the base film.
Select from the range of 0.5 to 10 μm. When the thickness is more than 10 μm, since there is a difference in flexibility between the base film and the coating, phenomena such as peeling of the coating from the base film are likely to occur, and the coating is cracked to lower the strength of the base film. This phenomenon is undesirable. 0.5
When the thickness is smaller than μm, the effect of improving the durability and dustproofness of the base film is not exhibited, so that it is not preferable. The thickness of the coating is preferably proportional to the thickness of the base film within the above range.

In actual use of the agricultural vinyl chloride resin film according to the present invention, when the coating is formed on only one side, the side on which the coating is provided is outside the house or tunnel. It is good to expand in this way.

[0038]

Industrial Applicability The vinyl chloride resin film for agricultural use of the present invention is excellent in stickiness, initial expansion and long-term anti-fog properties. It can be used for the side, skylights, doorways, wives, etc., and is extremely valuable as an agricultural covering.

[0039]

EXAMPLES The present invention will be described below with reference to examples, but the present invention is not limited to the following examples unless it exceeds the gist. Examples 1 to 4 and Comparative Examples 1 to 4 (1) Production of vinyl chloride resin film Polyvinyl chloride (degree of polymerization = 1300) 100 parts by weight Dioctyl phthalate 45 parts by weight Tricresyl phosphate 5 parts by weight Epoxy resin (trade name) "EP-828") 1.5 parts by weight Ba-Zn liquid stabilizer 1 part by weight Barium stearate 0.2 parts by weight Zinc stearate 0.4 parts by weight Sorbitan monopalmitate 1.5 parts by weight β-diketone compound ( 0.1 parts by weight Benzotriazole-based ultraviolet absorber 0.04 parts by weight (trade name "TINUVIN-P") Fluorinated surfactant (trade name "Unidyne DS-401") 0.2 parts by weight or more The above-mentioned resin raw materials and resin additives are weighed, and the components (A) and (B) of the type shown in Table 1 are further weighed. It was blended in an amount. These were stirred and mixed by a super mixer for 10 minutes, and then kneaded on a roll heated to 165 ° C., and the thickness of the mixture was adjusted to 0.1 mm by an L-type calender.
A 10 mm transparent vinyl chloride resin film was produced.

(2) Spouting property The condition of the film surface left for 6 months in a thermo-hygrostat at a temperature of 40 ° C. and a relative humidity of 80% was visually observed. The evaluation criteria are as follows. ◎ ・ ・ ・ The film is almost completely transparent.・ ・ ・: A little white and powdery spouting, but almost transparent. ○ × ・ ・ There is a white powdery spout, and transparency is slightly impaired. Δ: White powdery squirt was observed, the film was in a satin shape, and the transparency was poor. ×: White powdery spouting is remarkable and opaque.

(3) Stickiness The film cut to a width of 30 cm and a length of 150 cm was immersed in tap water of Nagoya City for 7 days, and wound around a galvanized iron pipe having a diameter of 2 cm and a width of 35 cm.
It was left in an oven at 55 ° C. for 4 weeks and dried. The ease of peeling when the film was unwound from the iron pipe was evaluated according to the following criteria.・ ・ ・: Smooth peeling and no resistance.・ ・ ・: There is a little resistance at the beginning of peeling. Δ: There is resistance to peeling. ×: Not easily peeled off, with great force.

(4) Anti-fogging film The film was coated on a pipe house (3 m in width, 10 m in depth, 1.5 m in ridge height) installed in a test field in Isshi-gun, Mie Prefecture, and from October 1997 to October 1998. For one year. For the stretched film, the antifogging property at the initial stage of stretching (1 hour after stretching) and
The long-term antifogging property was evaluated. (4-1) Antifog properties at the initial stage of spreading ・ ・ ・: Water droplets are uniformly wet in a streak shape and are transparent.・ ・ ・: Water droplets began to flow in a streak shape and were considerably transparent. ○ × ・ ・ Water droplets grew and there was no white shining part, and the whole was transparent. Δ: Fine water droplets adhered, but partly transparent. ×: Fine water droplets adhere to the entire surface and appear to glow white. (4-2) Extended long-term anti-fog properties 性: Uniformly wet on one side, and water film is completely transparent.・ ・ ・: Wet almost uniformly, water film almost transparent. ○ × ・ ・ Partially opaque with water droplets attached. Δ: Many water droplets adhered and many opaque parts. ×: Fine water droplets adhered to the entire surface, making it opaque.

[0043]

[Table 1]

 ──────────────────────────────────────────────────続 き Continued on the front page F term (reference) 2B024 DB01 2B029 EB02 EC04 EC09 EC17 RA03 4F071 AA24 AC12 AE16 AF30 AF56 AH01 BB06 BB09 BC01 BC12

Claims (1)

[Claims] 1. A vinyl chloride resin film containing (A) methylenebisstearamide and (B) ethylenebislauramide in a total amount of (A) and (B) based on 100 parts by weight of the vinyl chloride resin. 0.05 to 2 parts by weight, and the weight ratio of (A) to (B) is from 20: 1 to 1: 1.
Agricultural vinyl chloride resin film blended in the range of 9.