JP2001220450A - Polyolefin-based resin film for agriculture - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prepare an olefinic resin film which is useful for agriculture and has improved rubbing resistance with mica wires and the frame of a green house, when spread on the green house. SOLUTION: This olefinic resin-based film for agriculture is characterized by adding 0.01 to 3 pts.wt. of an amide-based lubricant and 0.01 to 3 pts.wt. of a metal soap to 100 pts. wt. of an olefinic resin. The amide-based lubricant is especially a fatty acid bisamide, and the metal soap is especially calcium stearate.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an agricultural film made of an olefin resin and having excellent rub resistance.

[0002]

2. Description of the Related Art An agricultural house is generally used by setting a film on a frame of the house and fixing the film with a mica wire so that the film does not fly due to wind or the like. Since such an agricultural house is installed outdoors, the mica wire and the frame of the house and the film have been rubbed or broken due to wind or the like.

[0003] In particular, olefin resin films tend to have lower rub resistance than vinyl chloride resin films, and it has been difficult to use them in windy regions.

[0004]

SUMMARY OF THE INVENTION In view of the above situation, an object of the present invention is to provide an olefin resin film for agricultural use having improved rub resistance as an olefin resin film.

[0005]

Means for Solving the Problems In order to solve the above problems, the invention according to the first aspect of the present invention relates to an amide-based lubricant containing 100 parts by weight of an amide-based lubricant. 01 to 3 parts by weight and metal soap 0.01 to
An agricultural olefin resin film characterized by adding 3 parts by weight.

According to a second aspect of the present invention, there is provided an agricultural film having a plurality of layers, wherein 100 parts by weight of an olefin-based resin and 100 parts by weight of an amide-based lubricant are added. 01 to 3 parts by weight and metal soap 0.01
This is an agricultural olefin resin-based film in which a layer to which about 3 parts by weight is added is provided at least in a layer located outside the house.

[0007] In the agricultural olefin resin film provided by the above, the invention according to claim 3 is characterized in that the amide-based lubricant is a fatty acid bisamide and the metal soap is calcium stearate.

[0008] That is, the agricultural olefin resin film of the present invention can improve the rub resistance of agricultural films by using an amide-based lubricant as a lubricant and a metal soap as a stabilizer in combination with the olefin-based resin. Is characterized.

[0009]

BEST MODE FOR CARRYING OUT THE INVENTION The olefin resin in the present invention includes low-density polyethylene, linear low-density polyethylene, medium-density polyethylene, high-density polyethylene, polyethylene such as polyethylene polymerized using a metallocene catalyst; Polypropylene such as block-polymerized polypropylene, isotactic polypropylene and syndiotactic polypropylene; ethylene copolymers such as ethylene-vinyl acetate, ethylene-acrylic acid, ethylene-acrylate, ethylene-methacrylic acid, ethylene-methacrylic ester And the like, and these alone or a mixture thereof can be used.

The amide-based lubricant according to the present invention includes amide stearic acid, amide palmitate,
Fatty acid amides such as methylene bisstearamide and ethylene bisstearamide can be mentioned, and among them, fatty acid bisamides such as methylene bisstearamide and ethylenebisstearamide gave good results.

The amount of the amide-based lubricant is 0.01 to 3 parts by weight based on 100 parts by weight of the olefin-based resin. If the amount of the amide-based lubricant is less than 0.01 parts by weight, the effect as a lubricant is not sufficient, and if it exceeds 3 parts by weight, the lubricant blooms and the film becomes white, and the transparency becomes poor, The stretched film will be stained with dust and dirt.

In the agricultural film of the present invention, a lubricant other than the amide-based lubricant can be used in combination. However, the total amount of these lubricants is 3.% based on 100 parts by weight of the olefin-based resin. It is preferable to use them together within a range not exceeding 5 parts by weight. If the total amount of the lubricant is too large, bloom tends to occur.

Other lubricants that can be used in combination with such amide-based lubricants include organic lubricants such as urea-based lubricants, especially those of the formula: R ^{1
-NH-CO-NH-R 2} (R 1 and R ^2, C ₆ -C ₂₄
Degree of alkyl, cycloalkyl, aralkyl,
Urea-based lubricants represented by aryl groups, alkyl-substituted aryl groups, etc.), and inorganic lubricants such as silica.

On the other hand, metal soaps as stabilizers added to the agricultural film of the present invention together with the amide-based lubricant include zinc stearate, barium stearate, calcium stearate, barium ricinoleate, calcium laurate, and oleic acid. Calcium, zinc octoate and the like can be mentioned, and the addition of calcium stearate gave good results.

The amount of the metal soap is 0.01 to 3 parts by weight based on 100 parts by weight of the olefin resin, and if the amount is less than 0.01 part by weight, the film lacks stability, Further, even if it is added in an amount exceeding 3 parts by weight, the stability of the film is not so much obtained. Therefore, it is preferable to add it in the above range.

The agricultural olefin resin film of the present invention may contain a fluorine-containing compound, an ultraviolet absorber,
Various additives such as a humectant, a drip-proof agent, and a light stabilizer can also be added.

As the fluorine-containing compound, a compound having a fluorine-containing group and at least one of a hydroxyl group and an alkylene oxide group in one molecule, or an ester of these with acrylic acid or methacrylic acid can be used.

As such a fluorine-containing group, perful
Oroalkyl group (C_nF_{2n + 1}Group), perfluoroalco
Xy group (C_nF_{2n + 1}O group), polyfluoroalkyl group
(H_mC _nF_{2n + 1-m}Group), perfluoroalkenyl group (C
_nF_2n-1Group), polyfluoroalkenyl group (H_mC_nF
_2n-1-mWherein m is 1 to 3 and n is 3
Represents an integer of to 20].

The alkylene oxide group includes
(C ₂ H ₄ O) _n , (C ₃ H ₆ O) _{n and the} like.
Represents an integer of 1 to 30].

Specific examples of such a fluorine-containing compound include those represented by formulas (1) to (32) in Table 1 below. These fluorine-containing compounds may be used alone or in combination of two or more. However, the present invention is not limited to these.

[0021]

[Table 1]

The amount of the fluorine-containing compound added is
0.01 to 3 with respect to 100 parts by weight of the olefin resin.
Parts by weight. If the addition amount is less than 0.01 parts by weight, the mist resistance is not sufficient, and if the addition amount of the fluorine-containing compound is more than 3 parts by weight, the mist resistance is not improved even though the cost is increased.

Examples of the ultraviolet absorber include salicylic acid ester compounds, benzotriazole compounds, hydroxybenzophenone compounds, acrylonitrile compounds, and substituted products thereof. These ultraviolet absorbers can be used alone or in combination of two or more.

Specific examples of the ultraviolet absorber include 2,4-dihydroxybenzophenone, 2-hydroxy-4-methoxybenzophenone, 2-hydroxy-4-ethoxybenzophenone, 2-hydroxy-4-octoxybenzophenone, and 5,5 '. -Methylenebis (2-hydroxy-
2-hydroxybenzophenones such as 4-methoxybenzophenone); 2- (2′-hydroxy-5′-methylphenyl) benzotriazole, 2- (2′-hydroxy-3 ′, 5′-di-tert-butylphenyl) -5 '
-Chlorobenzotriazole, 2- (2'-hydroxy-3'-tert-butyl-5'-methylphenyl)-
5-chlorobenzotriazole, 2- (2′-hydroxy-5′-tert-octylphenyl) benzotriazole, 2- (2′-hydroxy-3 ′, 5′-dicumylphenyl) benzotriazole, 2,2 ′ 2- (2'-hydroxyphenyl) such as -methylenebis (4-tert-octyl-6-benzotriazole) phenol
Benzotriazoles.

Further, phenyl salicylate, resorcinol monobenzoate, 2,4-di-tert-butylphenyl-3 ', 5'-di-tert-butyl-4'
Benzoates such as -hydroxybenzoate, hexadecyl-3,5-di-tert-butyl-4-hydroxybenzoate; oxanilides such as 2-ethoxy-4'-dodecyloxanilide;ethyl-α-cyano-β;
β-diphenyl acrylate, methyl-2-cyano-3
And cyanoacrylates such as -methyl-3- (p-methoxyphenyl) acrylate.

As the heat retaining agent, various hydrotalcites can be used. Such hydrotalcite is, for example, the general formula: is _{M (1-x) · Al} x · (OH) those represented by _{2 / X x / n · mH} 2 O. In the formula, M represents an alkaline earth metal or Zn, and X represents an n-valent anion. X and m satisfy the following conditions. 0 <x <0.5 0 ≦ m ≦ 2

As the n-valent anion, Cl is used.^-, Br^-,
NO_Three ^-, ClO_Four−, SO_Four ^2-, CO _Three ^2-, SiO_Three ^2-, H
PO_Four ^2-, HBO_Three ^2-, PO_Four ^3-, Fe (CN)₆ ^3-, Fe
(CN) ₆ ^Four-, CH_ThreeC00^-, C₆H_Four(OH) COO^-, (C
OO^-)_Two, C₆H_Four(COO^-), C_TenH₇SO_Three ^- A
Neon can be exemplified.

The above-mentioned hydrotalcites can be used after being treated with a surface treating agent, which further improves the dispersibility or affinity for the olefinic resin, thereby improving the processability of the film and the parallel light transmittance. Can be improved.

As such a surface treatment agent, for example,
Sodium laurate, potassium laurate, sodium oleate, potassium oleate, sodium stearate, potassium stearate, sodium palmitate, potassium palmitate, sodium caprate, potassium caprate, sodium myristate, potassium myristate, linoleic acid Alkali metal salts of higher fatty acids such as sodium and potassium linoleate.

Lauric acid, oleic acid, stearic acid,
Higher fatty acids such as palmitic acid, capric acid, myristic acid, and linoleic acid; isopropyl triisostearoyl tanate, isopropyl tris (dioctyl piophosphate) titanate, tetraisopropyl bis (dioctyl phosphate) titanate, vinyl triethoxy silane, gamma methacryloxypropyl Coupling agents such as trimethoxysilane and gamma-glycidoxypropyltrimethoxysilane can be used.

Examples of the anti-drip agent include conventionally known sorbitan fatty acid esters, sorbitol fatty acid esters, glycerin fatty acid esters, diglycerin fatty acid esters, sorbitan fatty acid / dibasic acid esters, glycerin fatty acid / dibasic acid esters, and diglycerin. fatty acid·
Esters of polyhydric alcohols and fatty acids such as dibasic acid esters, esters of fatty acids of polyhydric alcohols and dibasic acids, and compounds in which alkylene oxides such as ethylene oxide, propylene oxide and butylene oxide are added to these. No.

More specifically, sorbitan palmitate, sorbitan stearate, sorbitan stearate / ethylene oxide 2 mol adduct, sorbitan stearate / propylene oxide 3 mol adduct, sorbitan stearate / ethylene oxide 3 mol adduct, Diglycerin palmitate, diglycerin stearate,
Glycerin palmitate, glycerin stearate, diglycerin palmitate / ethylene oxide 2 mol adduct, sorbitan stearate adipate / ethylene oxide 3 mol adduct, sorbitol stearate adipate / ethylene oxide 2 mol adduct, diglycerin palmitate sebacate -Propylene oxide 3 mol adduct, sorbitol palmitate adipate / ethylene oxide 3 mol adduct, etc. can be used, but sorbitan dripproofing agents such as sorbitan palmitate are particularly preferred.

The above-mentioned drip-proofing agents can be used alone or in combination of two or more. The amount of addition is about 0.5 to 6.0 parts by weight based on 100 parts by weight of the olefin resin. Is preferred.

As light stabilizers, 2,2,6,6-tetramethyl-4-piperidine stearate, 1,2,2,2
6,6-pentamethyl-4-piperidyl stearate,
2,2,6,6-tetramethyl-4-piperidylbenzoate, N- (2,2,6,6-tetramethyl-4-piperidyl) dodecylsuccinimide, 1-[(3,5-
Di-tert-butyl-4-hydroxyphenyl) propionyloxyethyl] -2,2,6,6-tetramethyl-4-piperidyl (3,5-di-tert-butyl-
4-hydroxyphenyl) propionate, bis (2,
2,6,6-tetramethyl-4-piperidyl) sebacate, bis (1,2,2,6,6-pentamethyl-4-piperidyl) sebacate, bis (1,2,2,6,6-pentamethyl-4) -Piperidyl) -2-butyl-2-
(3,5-di-tert-butyl-4-hydroxybenzyl) malonate, N, N′-bis (2,2,6,6-
Tetramethyl-4-piperidyl) hexamethylenediamine. Tetra (2,2,6,6-tetramethyl-4-piperidyl) butanetetracarboxylate, bis (2
2,6,6-tetramethyl-4-piperidyl) di (tridecyl) butanetetracarboxylate, bis (1,
2,2,6,6-pentamethyl-4-piperidyl) di (tridecyl) butanetetracarboxylate, 3,9
-Bis {1,1-dimethyl-2- [tris (2,2,
6,6-tetramethyl-4-piperidyloxycarbonyloxy) butylcarbonyloxy] ethyl} -2,
4,8,10-tetraoxysaspiro [5,5] undecane, 3,9-bis {1,1-dimethyl-2- [tris (1,2,2,6,6-pentamethyl-4-piperidyloxy) Carbonyloxy) butylcarbonyloxy] ethyl {-2,4,8,10-tetraoxyspiro [5,5] undecane. 1,5,8,12-tetrakis {4,6-bis [N- (2,2,6,6-tetramethyl-4-piperidyl) butylamino] -1,3,5-triazin-2-yl} -1,5,8,12-tetraazadodecane, 1- (2-hydroxyethyl) -2,2,6
6-tetramethyl-4-piperidinol / dimethyl succinate condensate, 2-tert-octylamino-4,6-
Dichloro-s-triazine / N, N'-bis (2,2,
Hindered amine-based light stabilizers such as (6,6-tetramethyl-4-piperidyl) hexamethylenediamine / dibromoethane condensed compound.

The olefin resin film of the present invention may have a single-layer structure or a multilayer structure. In the case of a multi-layer structure, it is necessary to mix an amide-based lubricant and a metal soap in an outer layer at least when it is spread on a house. It is preferable that the amide-based lubricant and the metal soap be added to the layer which comes to the inside when the sheet is spread, because the effect of rubbing against the house frame is further exhibited.

In the case of a multilayer structure, the type of resin constituting each layer may be the same or different, but the resins of adjacent layers are mutually compatible or It is preferable to form a layer having high adhesiveness. In addition,
In the case of a multilayer structure of three or more layers, if both outermost layers are made of the same type of resin and the amounts of the amide-based lubricant and the metal soap are set to the same amount, the outermost layer can be expanded with either side outward. It is preferable because the same effect can be obtained.

As a method for forming the olefin resin film of the present invention, known means such as a calendering method, an extrusion method and an inflation method are employed.

[0038]

EXAMPLES Hereinafter, the olefin resin film for agricultural use of the present invention will be described in more detail with reference to Examples and Comparative Examples, but the present invention is not limited to these.

[Examples 1 to 5, Comparative Examples 1 to 5] An olefin resin film having a thickness of 0.1 mm was formed by a single-layer inflation method using the resins and additives described in Tables 2 and 3. Molded.

Examples 6 to 10 and Comparative Examples 6 to 10
An olefin resin film having a thickness of 0.1 mm was formed by a co-extrusion method using the resins and additives described in Table 5.

The Arabic numerals in Tables 2 and 3 represent parts by weight. Further, Arabic numerals in Tables 4 and 5 represent parts by weight in each of the outer layer, the intermediate layer, and the inner layer. In each table, VA5%, V
A10% and VA15% indicate that the vinyl acetate content in ethylene vinyl acetate is 5%, 10% and 15%, respectively.

The rubbing resistance and bloom of each olefin resin film formed in each of the examples and comparative examples were evaluated by the following test methods.
The results are also shown in the table.

(1) Rubbing resistance [Test method] The olefin-based resin film formed in each of the examples and comparative examples was spread on a single 4.5-meter wide large pipe house, and the film and mica after 12 months were spread. The rubbing state of the line was visually confirmed.

[Evaluation Criteria] 傷: No scratches due to rubbing are observed. ○: Some scratches due to rubbing are seen. ×: Torn due to rubbing, opening

(2) Bloom property [Test method] The olefin-based resin film formed in each of the examples and comparative examples was spread on a 4.5 m-wide single-building large pipe house. Was visually confirmed.

[Evaluation Criteria] A: Almost no bloom is observed. O: Some bloom is observed. Δ: The film surface is slightly whitish. X: Intense bloom is observed.

[0047]

[Table 2]

[0048]

[Table 3]

[0049]

[Table 4]

[0050]

[Table 5]

* 1: Ethylene-vinyl acetate (VA10
%): Evatate D2021 (Sumitomo Chemical Co., Ltd.) * 2: Insulating agent: Hydrotalcite: Trade name: Alkamizer 1 (Kyowa Chemical Co., Ltd.) * 3: Silica-based lubricant: Minsil 5 (Air Brown Co., Ltd.) * 4: UV absorber: Viosorb 520 (manufactured by Kyodo Yakuhin) * 5: Drip-proofing agent: diglycerin behenate * 6: Hindered amine compound: CHIMASSORB
944 (manufactured by Ciba Specialty Chemicals) * 7: Fluorinated compound: DS 403 (manufactured by Daikin) * 8: Amide-based lubricant: ethylene bisstearic acid amide * 9: Metal soap: calcium stearate * 10: Low density polyethylene : Sumikasen F200
(Manufactured by Sumitomo Chemical Co., Ltd.) * 11: Linear low-density polyethylene: Sumikacene αFZ
225-1 (Sumitomo Chemical Co., Ltd.) * 12: Ethylene-vinyl acetate (VA15%): Evatate D2081 (Sumitomo Chemical Co., Ltd.) * 13: Ethylene-vinyl acetate (VA5%): Evatate D2011 (Sumitomo Chemical Co., Ltd.)

[0052]

According to the present invention, an agricultural olefin resin film is obtained by adding 0.01 to 3 parts by weight of an amide lubricant and 0.01 to 3 parts by weight of a metal soap to 100 parts by weight of an olefin resin. Thereby, the rubbing resistance of the film is improved, and problems such as the mica line and the film being rubbed and broken by the strong wind are improved, which greatly contributes to the farmers.

Continued on the front page (51) Int.Cl. ⁷ Identification symbol FI Theme coat II (reference) C08K 5/098 C08K 5/098 5/20 5/20 C08L 23/00 C08L 23/00 F-term (reference) 2B024 DB01 2B029 EB03 EC02 EC09 EC20 4F071 AA14 AC09 AC12 AE11 AH01 BA01 BB04 BB06 BB09 BC01 4F100 AH03A AH08A AK03A AK03B BA02 CA19A CA30A GB01 JK09 YY00A 4J002 BB031 BB051 BB061 BB071 BB08 BB071 BB08 BB071 BB08

Claims (3)

[Claims] 1. An agricultural olefin resin film characterized in that 0.01 to 3 parts by weight of an amide lubricant and 0.01 to 3 parts by weight of metal soap are added to 100 parts by weight of the olefin resin. 2. An agricultural film having a plurality of layers, wherein 0.01 to 3 parts by weight of an amide-based lubricant and 0.01 to 3 parts by weight of a metal soap based on 100 parts by weight of an olefin-based resin.
An agricultural olefin resin-based film in which a layer to which parts by weight are added is provided at least on a layer located outside the house. 3. The amide-based lubricant is a fatty acid bisamide, and the metal soap is calcium stearate.
Or the agricultural olefin resin-based film according to 2.