JPS5857449A - Film for egg apple cultivation - Google Patents

Abstract

PURPOSE:To provide the titled film which controls blight and improves color of egg apple, prepared by adding a specified surfactant to vinyl chloride resin to improve transmission of light of a specific wavelength. CONSTITUTION:The film is prepared by adding (B) at least 0.5pts.wt. nonionic surfactant and (C) 0.01-1.0pt.wt. fluorine-based surfactant and/or silicone-based surfactant to (A) 100pts.wt. vinyl chloride resin. The film contains no ultraviolet ray absorber and shows 70% or higher transmission of light in the wavelength of 350nm. It improves color of egg apple and controls blight by lowering himidity.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a film for cultivating eggplants that causes less occurrence of fog and disease, and also provides good coloring of eggplants.

Conventionally, agricultural vinyl films, etc. have contained a small amount of ultraviolet absorber, so they have low ultraviolet O transmittance, and when used in eggplant culture houses or tunnels, they produce the pigment anthocyanin blue, which is harmful to eggplants. There was a drawback that the coloring was poor.

For this reason, films that do not contain ultraviolet rays or astringents have been proposed as films for eggplant cultivation, but such films are said to be more susceptible to gray mold and sclerotium diseases due to their large penetration of ultraviolet rays. There were drawbacks.

The inventors of the present invention conducted extensive research to eliminate the above drawbacks, and found that the occurrence of gray mold and sclerotium disease can be prevented by lowering the humidity in the greenhouse, and the ultraviolet transmittance is 70- or higher. The present invention has completed a film for cultivating eggplants that suppresses the occurrence of haze in the eggplants, and also provides good coloring of the eggplants and reduces the incidence of diseases.

That is, the eggplant cultivation film of the present invention contains at least 100 parts by weight of a vinyl chloride resin (at least 15 parts by weight or more of a nonionic surfactant) and α01-t.

Contains parts by weight of a fluorine-based surfactant and/or a silicon-based surfactant, and has a transmittance of 7 at a wavelength of 350 nm.
0- or more.

Vinyl chloride resins that can be used in the present invention include polyvinyl chloride and copolymers of vinyl chloride and other monomers, such as ethylene, vinyl acetate, vinyl ether, maleic ester, and the like. Blends of polyvinyl chloride and other polymers are also not excluded.Plasticizers, lubricants, stabilizers, antioxidants, pigments, inorganic substances, and It can contain antistatic agents and the like.

The nonionic surfactants used in the present invention include (
(Transformation) Polyoxyethylene alkyl ether, polyoxyethylene alkylaryl ether, ether type of polyoxyethylene polyoxypropylene ether, 03) Polyoxyethylene alkyl ester, esters such as partially esterified products of polyhydric alcohol and fatty acid. type, (C) aminoether type such as polyexyethylene alkylamine, CD) polyoxyethylene sorbitan fatty acid ester, polyoxyethylene sorbitol fatty acid ester, polyoxyethylene initane fatty acid ester, polyoxyethylene glyceryl fatty acid ester , ether ester types such as polyoxyethylene propylene glycol monofatty acid ester, and the like. These nonionic surfactants can basically be selected arbitrarily, but preferably they have properties such as moldability, heat resistance, transparency, etc. in addition to maintaining drip-proof properties, Examples of suitable nonionic surfactants for obtaining two or more properties that are desirable to fully satisfy the performance as an agricultural coating material are as follows: (a) Sorbitan, sorbitol, mannitan, mannitol, glycerin, diglycerin (b) The number of moles of ethylene oxide or propylene oxide added is 1 to 20, and the polyhydric alcohol is sorbitan,
Sorbitol, mannitane, glycerin, diglycerin, polyoxyalkylene polyhydric alcohol whose fatty acid has 12 to 22 carbon atoms, fatty acid ester (c) (aX
Mixtures of b) may be mentioned.

These nonionic surfactants are vinyl chloride resin 10
0 parts by weight, at least α5 parts by weight, preferably 1
．． It is added in a range 11 of 0 to 5.0 parts by weight.

If the amount added is less than 0.5 parts by weight, a sufficient drip-proof effect cannot be obtained, and if it is more than 50 parts by weight, there will be a lot of bleeding, whitening will occur due to water absorption, and transparency will decrease, which is preferable.

Next, according to the present invention, the fluorine-based surfactant added together with the nonionic surfactant is a surfactant characterized by having one fluorine atom in its molecular structure. rcshow.

(1) Nonionic lRf 0H Rf-0(CnHgnO)mH Ef (CHt)n 0)(Rf((lH,)10(C!nHi,O) mRf(C
! H,)nOOOH Rf B N (R') (C!IHnO) nII(
2) Anion yarn Rf Coo M Rf BtJ(R') OHx C! OOMRf BN
(RQ C!I(,OSo, MRf SOs M Rf B N (R')(OHM)n OP (OH)
Rf: A fluorinated aliphatic group or a fluorinated aromatic group having 1 to 20 carbon atoms, and the aliphatic group may be linear, branched, or cyclic.

B; divalent linking group (e.g. -BO!-1-Co-, etc.) y; hydrogen atom or alkyl group having 1 to 20 carbon atoms M: hydrogen atom or alkali metal 1, m, n: integer from 1 to 50 Silicone surfactant used in the present invention 1 is a surface active compound containing the structural formula +Si-〇÷ in its molecule. The following typical K11 agents can be used.

(a) Non-hydrolyzable siloxane-polyoxyalkylene block copolymer type (typical example) R@-810-(R,5io) a (Rt S 1-
0) b-8iRsY-0-(CnHtnO). R' R East, R2R@: Lower alkyl group R'; Hydrogen or lower alkyl group Y; Divalent organic group a, b, O, n: Positive integer ←) Hydrolyzable siloxane-polyoxyalkylene copolymer type (Representative example) R'l: (Rsto)a・(C!nH!no)b')c
R"R, R': Lower alkyl group!; Hydrogen or lower alkyl group "@bI C+"; Positive integer Fluorine surfactant and silicone surfactant may be used alone or in combination. The amount used is 0.001 to 1.0 parts by weight per 100 parts by weight of the vinyl chloride resin.If it is less than α01 parts by weight, there is no haze prevention effect;
If the fluorine-containing surfactant exceeds 50 parts by weight, the effect remains unchanged and the cost increases, which is undesirable. From the viewpoint of film adhesion and weather resistance, it is better to use a fluorine-based surfactant alone, which is effective in a small amount.

Examples of the present invention are listed below, but the present invention is not limited to these Examples.

Examples 1 to 3 Films of Q and Im were prepared for the formulations of Examples 1 to 3 in the table, and an eggplant fruit cultivation test was conducted.

Comparative Examples 1 to 3 αtm films were prepared for the formulations of Comparative Examples 1 to 3 in the table, and an eggplant fruit cultivation test was conducted in the same manner as Examples 1 to 5.

In the fruit cultivation test, the occurrence of Moya O, the coloring of eggplants,
The table shows the results of a survey on the incidence of disease.

As is clear from the table, it does not contain ultraviolet absorbers.
The anti-haze film (product of the present invention) with a light transmittance of 70-nm wavelength or higher and containing a silicone surfactant and/or a fluorine surfactant has been shown to improve the coloring of eggplants and reduce the incidence of disease. Recognize.

Procedural amendment December 1, 1980 Haruki Shimada, Commissioner of the Patent Office 1, Indication of the case, Patent Application No. 1983-154154 2, Name of the invention, film for eggplant cultivation 3, Person making the amendment: Relationship with the case, Applicant 4 , Date of amendment order 5, Column 6 of "Detailed explanation of the invention" of the specification to be amended, Attachment of contents of amendment (1) Moya of comparative example 1 in the table on page 9 of the specification The occurrence status is marked "○", but this should be corrected to "x".

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Claims (1)

[Claims] Per 100 parts by weight of vinyl chloride resin, at least [15
Contains at least 10 parts by weight of a nonionic surfactant and 101 to 10 parts by weight of a fluorine-based surfactant and/or a silicone-based surfactant, and has a transmittance of 70- to 550 nm O wave ik.
Film for eggplant cultivation that is above