JPH10180956A - Agricultural fluororesin film - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve the transparency and the coat adhesion properties and enhance the antifogging persistency far beyond the present level by forming a coat consisting of a specific thermoplastic resin, inorganic colloidal sol and a hindered amine compound no the surface of a fluororesin film with a specific wetting index. SOLUTION: The agricultural fluororesin film is manufactured by forming a coat consisting of an antifogging agent composit on made up of three main components such as (a) hydrophobic thermoplastic resin, (b) inorganic colloidal sol whose loading is 0.5-4 times that of the component of (a) in terms of solid content weight ratio and (c) a hindered amine compound whose loading is 0.001-0.1 times that of the component of (a) in terms of solid contact weight ratio and which contains one structural unit or more, in one molecule, expressed by formula (R1 , R2 , R3 , R4 are a 1-4C alkyl group and R5 is an alkylester group), formed on at least, one of the surfaces of a fluororesin film with 30dyne/cm or more of wetting index of one or both surfaces.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION The present invention relates to a method for producing
The present invention relates to an agricultural fluororesin film having excellent antifogging durability.

[0002]

2. Description of the Related Art Fluororesin films have been used in various applications by utilizing their excellent weather resistance, mechanical strength, transparency and the like. Among them, in recent years, the demand for a long-term extension film of an agricultural house has been increasing because of transmitting ultraviolet rays or saving the trouble of changing the film, and various fluororesin films have been developed.

However, when a fluororesin film is used for an agricultural house, if the water vapor in the house is condensed on the film surface due to low surface tension and adheres as water droplets, the light transmittance is significantly reduced. In addition, cold water drops on the crop surface cause growth disorders,
There is a problem that it does not function as an agricultural house.

[0004] To solve this problem, there have been proposed methods of providing various antifogging layers on a fluororesin film. For example,
Providing an antifogging agent coating layer or a resin layer containing a fine inorganic substance (Japanese Patent No. 2535185, Japanese Patent Application Laid-Open No. 5-59202, Japanese Patent Application Laid-Open No. 7-1684, etc.), or an inorganic hydrophilic colloid substance A method of providing an anti-fogging agent layer containing a surfactant, a surfactant, and a lithium silicate and / or a silane derivative (Japanese Patent Laid-Open No. 6-1453).
No. 89).

[0005]

However, it is difficult to maintain the anti-fogging property for a long period of time by any of the methods because the anti-fogging coating film is peeled off, and further improvement is an important issue. I have. An object of the present invention is to provide an agricultural film having excellent transparency and coating film adhesion and excellent antifogging durability.

[0006]

The present inventors have conducted various studies to solve the above-mentioned problems, and as a result, have found that a specific thermoplastic resin, an inorganic colloid sol and a specific thermoplastic resin are provided on the surface of a fluororesin film having a specific wetting index. The inventors have found that the above objects can be achieved by forming a coating film composed of a hindered amine compound, and have completed the present invention.

That is, the gist of the present invention is to provide a fluororesin film having a wetting index of 30 dyn / cm or more on one or both surfaces, on at least one surface having a wetting index of 30 dyn / cm or more. (A) Hydrophobic thermoplastic resin (b) The compounding amount is 0.5 part by weight based on the solid content relative to the component (a).
Up to 4 times the amount of the inorganic colloid sol (c) (a) The amount of the compound is 0.0
Coating derived from antifogging agent composition containing three to three times a hindered amine compound containing one or more structural units represented by the following general formula [I] in one molecule in an amount of 01 to 0.1 times Are formed on the agricultural fluororesin film, which is characterized by being formed.

[0008]

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, the present invention will be described in detail. (1) Fluororesin Film The fluororesin used in the agricultural fluororesin film of the present invention is not particularly limited as long as it is a thermoplastic resin containing fluorine in the molecular structural formula of the resin.
Examples include tetrafluoroethylene-based resins, trifluoroethylene-based resins, difluoroethylene-based resins, monofluoroethylene-based resins, and composites of these resins.

Specifically, polytetrafluoroethylene (PTFE), tetrafluoroethylene-perfluoroalkyl vinyl ether copolymer (PFA), tetrafluoroethylene-hexafluoropropylene copolymer (FEP), tetrafluoroethylene-ethylene Copolymer (ETFE), polyvinylidene fluoride (PVD)
F), polychlorotrifluoroethylene (PCTF
E), chlorotrifluoroethylene-ethylene copolymer, (ECTFE), tetrafluoroethylene-perfluorodimethyldioxole copolymer (TFEPD)
D) and polyvinyl fluoride (PVF).

[0010] Among them, PFA, FEP, ETFE, PVD
F, PCTFE, TFEPDD, PVF, especially ET
FE is preferred. ETFE is obtained by copolymerizing ethylene and tetrafluoroethylene at a content ratio of 30/70 to 70/30, and further includes one or more fluorine-containing olefins or hydrocarbon-based olefins. The component may be copolymerized. Examples of the additional component include α-olefins such as propylene and butene, hexafluoropropylene, fluorine-containing olefins such as vinylidene fluoride, perfluorobutylethylene and chlorotrifluoroethylene, ethyl vinyl ether, perfluoromethyl vinyl ether, and perfluoropropyl vinyl ether. Vinyl ethers and fluorine-containing acrylates. When copolymerizing these additional components, it is preferable to copolymerize in ETFE within a range of 50 mol% or less. In some cases, a small amount of 10 mol% or less may be copolymerized to modify ETFE.

[0011] The molecular weight of the ETFE is not particularly limited. However, 10 to 300 mm ³ as volumetric flow rate to be the measure
/ Sec is preferred. The volume flow rate here is 300 ° C., 30 kg / c using a Koka flow tester.
It is defined by a value (unit: mm ³ / sec) represented by the volume of ETFE flowing out per unit time from a nozzle having a diameter of 1 mm and a length of 2 mm under a load of m ² . In the production of ETFE, various conventionally known polymerization methods such as bulk polymerization, suspension polymerization, emulsion polymerization, and solution polymerization can be used. These ET
FE is known per se, for example,
It can be produced by the method described in No. 50163.

Further, in the present invention, the above-mentioned fluororesin may be used as a mixture with other thermoplastic resins such as polyethylene and polypropylene as long as the effects of the present invention are not impaired. In order to form a film from the above-mentioned fluororesin, a method known per se can be used, for example, by extrusion molding, inflation molding, or the like. The fluororesin composition of the present invention may contain various additives as required. As the additive, for example, organic pigments such as condensed azo type, isoindolinone type, quinacridone type, perylene type, perinone type, quinophthalone type, anthraquinone type, phthalocyanine type, titanium oxide, titanium yellow, zinc white, iron black, Examples thereof include inorganic pigments such as carbon black, red iron oxide, and ultramarine blue, pigment dispersants, and inorganic or organic antibacterial agents.

The thickness of the film is desirably in the range of 10 to 300 μm, preferably 20 to 200 μm. If the thickness of the film is too thin, it is easily broken, and if it is too thick, not only does the transparency deteriorate, but also the product becomes heavy, which may hinder workability (cutting, adhesion, spreading work, etc.) during handling. Fluororesin film used in the present invention,
The wetting index of one or both surfaces (JIS K67)
68) is 30 dyn / cm or more. If the wetting index is less than 30 dyn / cm, the adhesion between the coating film and the fluororesin film is poor, the coating film is liable to peel off, and the antifogging durability cannot be obtained.

A fluororesin film having a wetting index of less than 30 dyn / cm can be made to have the predetermined wetting index of the present invention by performing a surface treatment. Examples of such a surface treatment method include a corona discharge treatment, a sputter etching treatment, a sodium treatment, a sand blast treatment, and a frame treatment. Among them, corona discharge treatment is preferred from the viewpoints of adhesion between the antifogging coating film and the fluororesin film, workability, and cost.

(2) Antifogging agent composition As the hydrophobic thermoplastic resin which is the component (a) used in the present invention, for example, acrylic resin, vinyl chloride resin,
Polyester-based resins, polyurethane-based resins, silicon-based resins, fluorine-based resins, and the like can be mentioned, and among them, acrylic resins are preferable. These are used as a binder component of the inorganic colloid sol in the form of an emulsion or a solution dissolved in a solvent. In addition, these resins may be used alone or in combination of two or more.

The acrylic resin is at least 60 in total
% By weight of an alkyl ester of acrylic acid or methacrylic acid (hereinafter referred to as an alkyl ester of (meth) acrylic acid), or a mixture of a monomer of an alkyl (meth) acrylate and alkenylbenzene, and A polymer or copolymer obtained by polymerizing 40% by weight of an α, β-ethylenically unsaturated monomer copolymerizable therewith, according to ordinary polymerization conditions, for example, in the presence of a surfactant. is there.

Examples of the alkyl (meth) acrylate include methyl acrylate, ethyl acrylate, n-propyl acrylate, isopropyl acrylate, n-butyl acrylate, and 2-acrylate. Ethylhexyl ester, decyl acrylate, methyl methacrylate, ethyl methacrylate, methacrylic acid
n-propyl ester, isopropyl methacrylate, n-butyl methacrylate, 2-ethylhexyl methacrylate, decyl methacrylate, and the like. Generally, the alkyl group has 1 to 1 carbon atom. 20 alkyl acrylates and / or alkyl methacrylates having 1 to 20 carbon atoms in the alkyl group are used.

Examples of the alkenylbenzene include styrene, α-methylstyrene, vinyltoluene and the like. Examples of the α, β-ethylenically unsaturated monomer include α, β-ethylenically unsaturated sulfonic acids such as acrylic acid, methacrylic acid, maleic acid, maleic anhydride, fumaric acid, crotonic acid, and itaconic acid. 2-acrylamido-2-methylpropanoic acid; α, β-ethylenically unsaturated phosphonic acids; hydroxyl-containing vinyl monomers such as hydroxyethyl of acrylic acid or methacrylic acid; acrylonitriles; acrylamides; acrylic acid or methacrylic acid Glycidyl esters. These monomers may be used alone or in combination of two or more.

The inorganic colloid sol, which is the component (b) of the antifogging agent composition used in the present invention, has a function of imparting hydrophilicity to the surface of a molded article by being formed on the surface of a fluororesin film. As the inorganic colloid sol, for example, an aqueous sol obtained by dispersing inorganic aqueous colloid particles such as silica, alumina, iron hydroxide, tin hydroxide, titanium oxide, and barium sulfate in water or a hydrophilic medium by various methods. can give. Of these, particularly preferred is
It is a silica sol.

These inorganic colloid sols preferably have an average particle size in the range of 5 to 100 nm. Within this range, two or more types of colloid sols having different average particle sizes may be used in combination. If the average particle size exceeds 100 nm, not only the transparency of the coating film will deteriorate, but also the antifogging durability will decrease. If it is less than 5 nm, the stability of the inorganic colloid sol may be lacking.

The hindered amine compound as the component (c) used in the present invention contains one or more structural units represented by the above general formula [I] in one molecule. Specifically, dimethyl-1- (2-hydroxyethyl) -4-hydroxy-2,2,6,6-tetramethylpiperidine succinate polycondensate, poly [{6- (1,1,3,3) -Tetramethylbutyl) imino-1,3,5-triazine-2,4-diyl {(2,2,6,6-tetramethyl-4-piperidyl) imino {hexamethylene} (2,2,6 6-tetramethyl-4-piperidyl) imino}], 2- (3,
5-di-t-butyl-4-hydroxybenzyl) -2-
Bis (1,2,2,6,6-pentamethyl-4-piperidyl) n-butylmalonate, 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, bis (2,2,6,6-tetramethyl-4
-Piperidyl) sebacate, bis (1-n-octoxy-2,2,6,6-tetramethyl-4-piperidyl) sebacate, bis (1,2,2,6,6-pentamethyl-
4-piperidyl) sebacate, 1- [2- {3- (3,
5-di-t-butyl-4-hydroxyphenyl) propionyloxy {ethyl] -4- {3- (3,5-di-t
-Butyl-4-hydroxyphenyl) propionyloxy {-2,2,6,6-tetramethylpiperidine, 4-
Benzoyloxy-2,2,6,6-tetramethylpiperidine, 8-acetyl-3-dodecyl-7,7,9,9
-Tetramethyl-1,3,8-triazaspiro [4.
5] Decane-2,4-dione, tetrakis (1,2,2
2,6,6-pentamethyl-4-piperidyl) -1,
2,3,4-butanetetracarboxylate, tetrakis (2,2,6,6-tetramethyl-4-piperidyl)
-1,2,3,4-butanetetracarboxylate, bis (1,2,2,6,6-pentamethyl-4-piperidyl) di (tridecyl) -1,2,3,4-butanetetracarboxylate , Bis (2,2,6,6-tetramethyl-4-piperidyl) di (tridecyl) -1,2,2
3,4-butanetetracarboxylate, 3,9-bis [1,1-dimethyl-2- {2,3,4-tris (1,
2,2,6,6-pentamethyl-4-piperidyloxycarbonyl) butylcarbonyloxydiethyl] -2,
4,8,10-tetraoxaspiro [5.5] undecane, 3,9-bis [1,1-dimethyl-2- {2,3,3
4-tris (2,2,6,6-tetramethyl-4-piperidyloxycarbonyl) butylcarbonyloxydiethyl] -2,4,8,10-tetraoxaspiro [5.
5] Undecane and the like.

Among them, bis (2,2,6,6-tetramethyl-4-piperidyl) sebacate, bis (1-n-octoxy-2,2,6,6-tetramethyl-4-piperidyl) sebacate, Bis (1,2,2,6,6-pentamethyl-4-piperidyl) sebacate, tetrakis (1,2,2,6,6-pentamethyl-4-piperidyl) -1,2,3,4-butanetetracarboxy Rate, tetrakis (2,2,6,6-tetramethyl-4-
Piperidyl) -1,2,3,4-butanetetracarboxylate, bis (1,2,2,6,6-pentamethyl-
4-piperidyl) di (tridecyl) -1,2,3,4
-Butanetetracarboxylate, bis (2,2,6,
6-tetramethyl-4-piperidyl) .di (tridecyl) -1,2,3,4-butanetetracarboxylate is preferred, and bis (2,2,6,6) is particularly preferred.
-Tetramethyl-4-piperidyl) sebacate, tetrakis (1,2,2,6,6-pentamethyl-4-piperidyl) -1,2,3,4-butanetetracarboxylate, tetrakis (2,2,6) 6-tetramethyl-4-
Piperidyl) -1,2,3,4-butanetetracarboxylate, bis (1,2,2,6,6-pentamethyl-
4-piperidyl) di (tridecyl) -1,2,3,4
-Butanetetracarboxylate.

These hindered amine compounds may be used alone or in combination of two or more.
The mixing ratio of each essential component of the anti-fogging agent composition is such that the inorganic colloid sol is 0.5 times or more and 4 times or less in terms of solid content weight ratio to the hydrophobic thermoplastic resin, and is represented by the above general formula [I]. The hindered amine compound containing one or more structural units in one molecule is blended at a ratio of 0.001 times or more and 0.1 times or less.

Here, if the blending ratio of the inorganic colloid sol is less than 0.5 times, a sufficient antifogging effect cannot be exhibited, and if it exceeds 4 times, not only the antifogging effect does not improve in proportion to the blending amount, but also The coating film after formation becomes cloudy and reduces transparency,
Further, the coating film is not preferable because it is rough and easily fragile. Further, the compounding ratio of the hindered amine compound is 0.1.
If it is less than 001 times, the long-term anti-fogging property is not sufficiently exhibited, and
If the ratio exceeds 1, the transparency may be deteriorated due to bleed-out, and the adhesion between the fluororesin film and the anti-fog coating film may be reduced.

The antifogging agent composition of the present invention preferably contains, in addition to these essential components, a crosslinking agent for a hydrophobic thermoplastic resin for the purpose of improving water resistance. Examples of the crosslinking agent used include phenol resins, amino resins, amine compounds, aziridine compounds, azo compounds, isocyanate compounds, epoxy compounds, silane compounds and the like. Of these, amine compounds, aziridine compounds, and epoxy compounds are particularly preferred.

Examples of the amine compounds include aliphatic polyamines such as diethylenetriamine, triethylenepentamine and hexamethylenediamine; and alicyclic compounds such as 3,3'-dimethyl-4,4'-diaminodicyclohexylmethane and isophoronediamine. Amine; Aromatic amines such as 4,4'-diaminodiphenylmethane and m-phenylenediamine are used.

Aziridine compounds include tris-
2,4,6- (1-aziridinyl) -1,3,5-triazine, trimethylolpropane-tri-β-aziridinylpropionate, tris [1- (2-methyl) aziridinyl] triphosphatriazine and the like Is used. Epoxy compounds include reaction products of bisphenol A or bisphenol F with epichlorohydrin, epoxidized novolak resins produced by the reaction of a resin reaction product of phenol (or substituted phenol) with formaldehyde and epichlorohydrin, epichlorohydrin and aliphatic Polyhydric alcohols such as glycerol,
Resinous reaction products produced from 1,4-butanediol, poly (oxypropylene) glycol or similar polyhydric alcohol components, resins obtained by epoxidation using peracetic acid, and the like are used. In the case of epoxy compounds, it is preferable to use a tertiary amine or a quaternary ammonium salt in combination as a catalyst.

These crosslinking agents can be used in an amount of 0.1 to 30% by weight based on the solid content of the hydrophobic thermoplastic resin. Particularly preferred is a range of 0.5 to 10% by weight. Further, a liquid dispersion medium is added to the antifogging agent composition used in the present invention, if necessary. Such a liquid dispersion medium includes a hydrophilic or water-miscible solvent containing water, and water; methyl alcohol, ethyl alcohol,
Monohydric alcohols such as isopropyl alcohol; polyhydric alcohols such as ethylene glycol, diethylene glycol and glycerin; cyclic alcohols such as benzyl alcohol; cellosolve acetates; and ketones. These liquid dispersion media may be used alone or in combination, but the dispersion stability of the antifogging composition, the hydrophilicity of the formed coating film,
It is preferable to determine in consideration of the difficulty and economics of removing the liquid dispersion medium.

The antifogging agent composition of the present invention may further contain, if necessary, conventional antifoaming agents, surfactants, plasticizers, film-forming auxiliaries, thickeners, pigments, pigment dispersants and the like. Additives can be blended. (3) Production Method In producing the agricultural fluororesin film of the present invention, the antifogging coating film may be formed on both surfaces or only one surface depending on the use of the film. Anyway,
The antifogging agent composition of the present invention has a wetting index of 30 dyn / cm.
It is necessary to apply on the fluororesin film surface described above. After applying the composition, the composition is subjected to forced drying or natural drying, and the liquid dispersion medium is volatilized to form an antifogging coating film.

[0030] As a coating method, a known coating method such as a doctor blade coating method, a roll coating method, a dip coating method, a spray coating method, a rod coating method, a bar coating method, a knife coating method, a brush coating method or the like is employed. it can. Also, as a method of forced drying, hot air drying method,
An infrared radiation method or the like can be adopted. The heating temperature during forced drying is determined by the applied anti-fogging agent composition,
The range is 50 to 250 ° C, preferably 60 to 200 ° C.

Antifogging agent composition on the surface of fluororesin film
Is applied and the liquid dispersion medium is dried,
The adhesion amount is 0.01 to 10 g / m^Two, Especially 0.1-5g
/ M ^TwoIs preferably within the range. Gain in this way
Agricultural fluororesin film as agricultural covering material
When used, a filter with an antifogging coating on one side only
Lum, the surface will be inside the house or tunnel
Just use it.

[0032]

The agricultural fluororesin film of the present invention comprises:
Since the transparency and coating film adhesion are good without impairing the properties of the fluororesin film, and the antifogging durability is dramatically improved, for example, it is effective as an agricultural covering material such as an outer film or an inner film. .

[0033]

【Example】

Examples 1 to 6 and Comparative Examples 1 to 6 (1) Preparation of Fluororesin Film Discharge was performed on one side of an ethylene-tetrafluoroethylene copolymer film (trade name: Aflex, thickness: 100 μm, manufactured by Asahi Glass Co., Ltd.). Voltage: 104 V, discharge current: 4.1 A, line speed: 5 to 50 m / mim. , And a wetting index (based on JIS-K6768) was measured. In Comparative Example 6, the corona treatment was performed, but the wetting index was smaller than 30 dyn / cm.

(2) Anti-fog coating film Preparation of thermoplastic resin (A to C) 2 parts by weight of polyoxyethylene lauryl ether and 80 parts by weight of water are charged into a four-necked flask and heated to 60 ° C. under a stream of nitrogen gas. Heat and add 0.5% ammonium persulfate
Then, 100 parts by weight of a mixture of each monomer shown in Table 1 was added dropwise over 3 hours while maintaining the reaction temperature in the range of 60 to 70 ° C. After completion of the dropwise addition, the mixture was kept at the same temperature range for 2 hours, cooled, and neutralized with aqueous ammonia to obtain acrylic resin emulsions A to C.

The acrylic emulsion obtained in the preparation of the antifogging composition was mixed with an inorganic colloid sol, a hindered amine compound and a crosslinking agent in the proportions shown in Table 2 to prepare an antifogging composition. The liquid dispersion medium is a mixture of water and ethyl alcohol in 3:
Used at a ratio of 1. Formation of Antifogging Coating Film The obtained antifogging agent composition was applied on a corona-treated surface of a fluororesin film shown in Table 2 by a bar coating method so that the coating amount after drying was 1 g / solid. m ² and dried in an oven at 85 ° C. for 1 minute.

(3) Evaluation of Film The performance of the obtained film was evaluated by the following method, and the results are shown in Table 2. Transparency A haze meter was used to measure the haze of a 30 mm × 50 mm film test piece (HAZE: JIS-K7105).

Adhesion A cellophane tape was adhered to the surface of the film on which the coating film was formed, and when the cellophane tape was peeled off, the peeling state of the coating film was visually observed. The criteria were as follows. ：: The coating film completely remains, and no peeling of the coating film occurs. (Coating peeling area 0%) ○: The coating peeling area is less than 50%. Δ: The coating film peeling area is 50% or more and less than 100%. ×: The coating film is completely peeled off (coating film peeling area 100%)

Antifogging property In a field in Isshi-gun, Mie Prefecture, a frontage of 8.3 m, a depth of 12 m,
Each of the obtained films was coated on a roof-type house having a ridge height of 3.5 m and a roof inclination of 20 ° such that the surface on which the antifogging coating film was formed was located inside the house, and a stretching test was performed. The evaluation method is based on the situation where water droplets adhere to the film surface inside the house.
Observed visually over time. The criteria were as follows. ◎: Water adheres in a thin film form and no water droplets are observed. ：: Water adheres in a thin film state, but slightly large water droplets are observed. Δ: Partially fine water droplets are observed. State ×: A state in which fine water droplets are observed on the entire surface

[0039]

[Table 1]

The symbols in Table 1 mean the following, respectively. MMA: methyl methacrylate, BMA: n-butyl methacrylate St: styrene, EA: ethyl acrylate, AA: acrylic acid HEMA: 2-hydroxyethyl methacrylate

[0041]

[Table 2]

The notes in Table 2 mean the following, respectively. * 1 The amount of the thermoplastic resin is indicated by the polymer solid content% by weight with respect to the anti-fogging agent composition, and the amount of the inorganic colloid sol, the hindered amine compound and the crosslinking agent is the solid content by weight relative to the thermoplastic resin solid weight. Indicated. * 2 a: Colloidal silica, average particle size 40 nm b: Colloidal silica, average particle size 80 nm * 3 α: bis (2,2,6,6-tetramethyl-4-piperidyl) sebacate β: tetrakis (1,2,2) 2,6,6-pentamethyl-
4-piperidyl) -1,2,3,4-butanetetracarboxylate γ: tetrakis (2,2,6,6-tetramethyl-4-
Piperidyl) -1,2,3,4-butanetetracarboxylate δ: bis (1,2,2,6,6-pentamethyl-4-piperidyl) di (tridecyl) -1,2,3,4-butane Tetracarboxylate * 4 b: Trade name "Epiclon 860" (a bisphenol A type epoxy compound manufactured by Dainippon Ink and Chemicals, Inc.) b: Tetraethylenepentamine

────────────────────────────────────────────────── ─── Continued on the front page (51) Int.Cl. ⁶ Identification code FI B32B 27/18 B32B 27/18 C C08J 7/04 CEW C08J 7/04 CEWS (72) Inventor Akira Makimura Nakamura-ku, Nagoya-shi, Aichi Prefecture 2 Oike, Iwazuka-cho Nagoya Office, Mitsubishi Chemical MKV Corporation

Claims (4)

[Claims] 1. The wetting index of one or both surfaces is 30 dy
For a fluororesin film of n / cm or more, the wetting index
Is at least 30 dyn / cm on at least one surface; (a) a hydrophobic thermoplastic resin;
Up to 4 times the amount of the inorganic colloid sol (c) (a) The amount of the component is 0.0
01 to 0.1 times the structural unit represented by the following general formula [I]
Amine compounds containing at least one in a molecule
Derived from an antifogging agent composition containing three components as main components
Fluororesin resin for agriculture characterized by forming
Film. Embedded image(In the formula [I], R₁, R_Two, R_Three, R_FourIs the carbon number
1-4 alkyl groups, R _FiveIs hydrogen or alkyles
It represents a ter group and an alkyl group having 1 to 4 carbon atoms. ) 2. The agricultural fluororesin film according to claim 1, wherein the fluororesin is a tetrafluoroethylene resin. 3. The tetrafluoroethylene-based resin is characterized in that ethylene and tetrafluoroethylene are in a ratio of 30/70 to 70 /
The agricultural fluororesin film according to claim 2, which is an ethylene-tetrafluoroethylene copolymer copolymerized at a ratio of 30 (molar ratio). 4. The agricultural fluororesin film according to claim 1, wherein the hydrophobic thermoplastic resin is an acrylic resin.