KR101303934B1 - Method for manufacturing reflecting film for agriculture and the film thereby - Google Patents

Abstract

The present invention relates to an agricultural reflective film production method and an agricultural reflective film according thereto, in the agricultural reflective film manufacturing method formed by depositing an aluminum thin film layer on a base paper made of a synthetic resin film, OPP, CPP, PET, PE film of a multi-layer structure Forming an aluminum thin film layer on a base paper formed of at least one selected from the group consisting of zeolite, chil gemstone, bentonite, tourmaline, germanium, 0.005 ~, including 0.1-60% by weight of at least one antimicrobial mineral selected from elvan, shell, illite, charcoal, activated carbon, calcium carbonate, talc, aluminum hydroxide, ocher, ceramic It is characterized by comprising the step of forming a protective layer to a thickness of 0.100mm In this case, the agricultural reflective film according to the present invention is formed of a multi-layered film of OPP, CPP, PET to prevent tearing, and forming a protective layer on the surface of the aluminum thin film layer to prevent oxidation of the aluminum thin film and wrinkles on the surface. It is effective in preventing, improving glossiness and enhancing strength.

Description

Agricultural reflective film manufacturing method and agricultural reflective film according to it {METHOD FOR MANUFACTURING REFLECTING FILM FOR AGRICULTURE AND THE FILM THEREBY}

The present invention relates to an agricultural reflective film used to increase the commerciality of fruit by inducing even coloration and increasing sugar content by supplementing the light lacking in the fruit of the harvester by spreading or reflecting light on the bottom of the orchard of the harvester. The present invention relates to reflective, architectural, industrial, and agricultural reflective films that increase efficiency and maintain wrinkles and gloss in the manufacture of products, and in particular, have improved durability and tear resistance.

In general, in order to improve the coloring of the harvester fruit is used to coat a reflective film on the bottom of the orchard, such a conventional reflective film can be largely divided into three. Firstly, it is a reflective film that deposits aluminum thin film on PET (polyethylene terephthalate) single layer. It is a non-coated reflective film and is used by consumers because it is inexpensive. However, when it is used, it is oxidized by contact with soil, moisture, pesticide and light. Falling occurs easily oxidizing the thin film and the strength and elongation at the time of coating is weak, the film has a disadvantage of poor workability.

In order to prevent corrosion of the aluminum thin film in contact with soil, moisture, pesticides and light, second, after depositing the aluminum thin film on an oriented poly propylene (OPP film) single layer, LDPE (Low Density Poly Ethylene) ) Is a reflective film made by melting OPP aluminum on its surface and selling it as the single-sided reflective film on the market. This is because the elongation between OPP and LDPE is significantly different, it improves the strength and elongation, and as the LDPE is thickly coated, it is used for the product by spraying starch powder to improve wrinkles during manufacturing. If there is a drop and the injection amount is small there is a problem that wrinkles occur and manufacturing costs are expensive.

Finally, a thin film of aluminum is deposited on a single layer of OPP film (oriented poly propylene: poly propylene) and then laminated with CPP (cast poly propylene). It is known as a double-sided reflective film and has the highest strength and the highest price. This is also used as a method to supplement the stretching and strength of the reflective film, but in order to improve the generation of wrinkles, it is used for the product by spraying starch powder. However, when the injection volume is high, the gloss drops, and when the injection amount is small, the wrinkle is generated. Is generated. In addition, manufacturing costs increase due to rising costs.

The conventional reflective film as described above produces products by spraying starch powder evenly on the surface during processing to minimize the appearance of gloss, the strength of the reflective film and the occurrence of wrinkles in actual use. If less, wrinkles are generated, and if more, the gloss is degraded. In addition, the uncoated reflective film has a problem in that the manufacturing process is complicated, the manufacturing cost is increased, and the recycling process is increased by using a combination of coatings or different films in order to prevent the problem of inferior oxidation and oxidation of the deposited aluminum.

An object of the present invention is to solve the problems with the conventional agricultural reflective film, to form an inorganic coating layer with an aluminum thin film layer on the base paper to prevent oxidation and dropping of the aluminum thin film and to greatly improve the elongation and strength durability to tear It is to provide an improved agricultural reflective film.

Another object of the present invention is to form an aluminum thin film layer on the base paper, mixing and coating the inorganic material and the coating liquid, and drying and pressing to provide a method for producing an agricultural reflective film to prevent oxidation and dropping of the aluminum thin film and to improve strength and elongation. will be.

In order to achieve the above object, the agricultural reflective film manufacturing method according to the present invention in the agricultural reflective film manufacturing method by depositing an aluminum thin film layer on a base paper made of a synthetic resin film, OPP, CPP, PET, among the multilayer PE film Forming an aluminum thin film layer on at least one selected base, and forming a protective layer on the aluminum thin film layer to prevent oxidation and gloss protection, increase strength, and prevent wrinkles of the aluminum thin film, wherein the protective layer is formed of zeolite, At least one antimicrobial mineral selected from bentonite, tourmaline, germanium, elvan, shell, illite, charcoal, activated carbon, calcium carbonate, talc, aluminum hydroxide, ocher, ceramic Forming a thickness of 0.005 ~ 0.100mm including 0.1 ~ 60% by weight It is configured to feature a.

The PE multilayer film is selected from a film of a laminated structure by melting PE and PP in each raw material tank and extruding two films, and a film of a structure laminated by melting and extruding a material selected from HDPE, LLDPE, and LDPE. It is desirable to be.

The protective layer forming step is performed by uniformly mixing the granular inorganic material to any one selected from PE, PS, vinyl chloride resin, acrylic resin, or coating any one selected from PE wax, PP wax, LP wax Next, the granular inorganic material may be sprayed, pressed and dried.

In addition, the protective layer forming step may be carried out by spraying the particulate inorganic material when laminating any one selected from PE, PS, PP, biodegradable film, breathable film, paper, non-woven fabric.

In addition, the protective layer forming step is coated with any one selected from LDPE, LLDPE, HDPE 99 ~ 50% by weight, any one selected from PE wax, PP wax, LP wax mixed by 1 to 50% by weight, then granular inorganic material It may be carried out by spraying, pressing and drying.

In the agricultural reflective film according to the present invention, in the agricultural reflective film in which an aluminum thin film layer is deposited on a base paper made of a synthetic resin film, an aluminum thin film layer is formed on a base paper formed of at least one selected from multilayer films of OPP, CPP, PET, and PE. On the aluminum thin film layer, a protective layer is provided on the aluminum thin film to prevent oxidation and gloss protection, enhance strength, and prevent wrinkles, and the protective layer is zeolite, seven stone, bentonite, tourmaline, germanium, elvan, shell, illite, The thickness of 0.005 ~ 0.100mm, including 0.1 ~ 60% by weight of the protective layer, in the form of 100 ~ 1000 mesh of antimicrobial inorganic material selected from charcoal, activated carbon, calcium carbonate, talc, aluminum hydroxide, loess, ceramic It is configured to characterized by.

A plurality of drainage holes may be formed in the reflective film.

Reflective film according to the present invention by forming a protective layer containing an inorganic material on the surface of the aluminum thin film layer to prevent oxidation of the aluminum thin film and to prevent the occurrence of wrinkles on the surface, improve the gloss characteristics, the strength is enhanced to prevent the effect of tearing There is.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will now be described more fully hereinafter with reference to the accompanying drawings, in which embodiments of the invention are shown.

Method for manufacturing a multi-purpose reflective film according to the present invention, by forming an aluminum thin film layer on the base formed of at least one selected from OPP, CPP, PET and PE film of a multi-layer structure, including the antimicrobial granular inorganic particles on the surface of the aluminum thin film layer It comprises a step of forming a protective layer by coating to a thickness of 0.005 ~ 0.100mm.

In the present specification, the PE film of the multi-layer structure is melted and extruded two films by dissolving PE and PP in each raw material tank, and melted and extruded by melting a material selected from a film or PE, especially HDPE, LLDPE, LDPE, laminated structure. It means a laminated structure. At this time, each film is extruded to a thickness of 0.005 ~ 0.040mm, preferably two to three layers of film by differently laminated with an adhesive or laminated integrally in the extrusion process to produce a multi-layer structure.

The inorganic material included in the protective layer is at least one selected from zeolite, chilseok, bentonite, tourmaline, germanium, elvan, shell, illite, charcoal, activated carbon, calcium carbonate, talc, aluminum hydroxide, ocher, and ceramics. In any one, it is mixed uniformly at 0.1 to 60% by weight based on the weight of the protective layer.

The granular inorganic material is preferable to have a particle size larger than 100 mesh because it causes scratches on the surface of the aluminum thin film layer to lower the gloss. However, in the case of particle size smaller than 1000 mesh, the cost of grinding is greatly increased. Since there is a problem of large increase, it is preferable that the inorganic particles have a size of 100 to 1000 mesh. The inorganic material prevents oxidation of the aluminum thin film layer and prevents wrinkles on the surface, improves glossiness, and prevents tearing of the aluminum thin film layer.

The protective layer is formed of the above-described inorganic granular material having antimicrobial properties to any one selected from PE, PS, vinyl chloride resin and acrylic resin in order to prevent oxidation, gloss protection, strength enhancement and wrinkle generation of the aluminum thin film layer. It is made by uniformly mixing and coating.

As another embodiment of forming the protective layer, any one selected from a film selected from PE, preferably LLDPE, LDPE and HDPE, PS, PP, OPP and CPP, biodegradable film, breathable film, paper, and nonwoven fabric on the surface of the aluminum thin film layer. One can be laminated and formed, and the granular inorganic material is sprayed and included at the time of lamination.

As another embodiment of forming the protective layer, coating any one selected from synthetic wax PE wax, PP wax, LP wax to a thickness of 0.005 ~ 0.100mm on the aluminum thin film layer, and spraying the inorganic material in the form of powder degranulation It may be formed by pressing with a pressing roll so as not to be dried, and then dried by one method selected from a warm air treatment, a heating roll, a cooling roll, and a cold wind treatment. In addition, the PE, preferably LDPE, LLDPE, HDPE by mixing any one selected from 99 to 50% by weight, any one selected from PE wax, PP wax, LP wax of 1 to 50% by weight thickness of 0.005 to 0.100mm After coating, the granular inorganic material may be sprayed, pressed, and dried.

In addition, a plurality of drainage holes may be formed in the reflective film according to the present invention, thereby preventing rain water from accumulating on the reflective film, thereby preventing the occurrence of burnout phenomenon due to lens action due to water droplets on the reflective film.

According to the present invention, a reflective film was prepared as follows to test the strength and elongation.

(Example 1)

According to the present invention, 10 wt% of the base paper is coated on a surface of an aluminum thin film deposited on the base of the OPP film layer by mixing 90% by weight of a vinyl chloride resin with 10% of a granular potassium carbonate having a particle size of 325 mesh. One protective layer was formed to produce a 20 micron thick reflective film.

(Example 2)

According to the present invention, on the surface of aluminum deposited on the base of the OPP film layer, a composition of 60% by weight of vinyl chloride resin and 40% by weight of granular calcium carbonate having a size of 325 mesh was mixed at 10% by weight based on the weight of the base. A coated protective layer was formed to prepare a 30 micron thick reflective film.

(Example 3)

According to the present invention, a protective layer coated on a surface of an aluminum thin film deposited on an OPP film layer by coating 20% by weight of a composition containing 50% by weight of LDPE and 50% by weight of granular potassium carbonate having a particle size of 325 mesh. To form a 35 micron thick reflective film.

(Example 4)

According to the present invention, a protective layer coated with 20% weight of the base paper by mixing 30% of 325 mesh granular calcium carbonate with LDPE on the surface of the aluminum thin film deposited on the base of the OPP film layer by mixing A 33 micron thick reflective film was prepared.

(Comparative Example 1)

A 35-micron thick reflective film was prepared by depositing an aluminum thin film layer on the basis of a single layer of OPP film and coating LDPE with a protective layer.

(Comparative Example 2)

An aluminum thin film layer was deposited on the basis of a single layer of OPP film, and a CPP film was laminated as a protective layer to prepare a 37 micron thick reflective film.

(Comparative Example 3)

A 17 micron thick reflective film was prepared by depositing an aluminum thin film layer based on a single layer PET film.

The tensile strength and elongation of the above Examples 1 to 4 and Comparative Examples 1 to 3 were tested and shown in Table 1 below.

In order to compare the effects of the invention in the Examples and Comparative Examples of the present invention was measured by comparing the strength and elongation as follows.

Comparison of Physical Properties of Reflective Films

Item Comparative Example 1
OPP + Al Deposition + LDPE
coating Comparative Example 2
OPP + Al Deposition + CPP Laminated Comparative Example 3
PET deposition Example 1
OPP + Al Deposition +
Vinyl chloride resin
(10% mineral mixture
10% weight coating) Example 2
OPP + Al Deposition +
Vinyl chloride resin
(40% mineral mixture
10% weight coating) Example 3
OPP + Al Deposition +
LDPE coating
(50% mineral mixture
20% weight coating) Example 4
OPP + Al Deposition +
LDPE coating
(30% mineral mixture
20% weight coating) thickness() 35 37 17 20 30 35 33 The tensile strength
(kgf / mm) MD 2.50 3.40 4.06 4.82 4.39 5.94 6.21 CD 4.51 6.94 3.94 4.35 4.15 5.10 5.75 Elongation (%) MD 61.1 67.0 46.5 71.9 60.2 75.3 104.4 CD 15.5 20.3 44.1 55.7 48.2 80.4 90.8

In Table 1, the tensile strength of Examples 1, 2, 3, 4 according to the present invention was confirmed that the tensile strength is improved by the protective layer, in particular the elongation is significantly improved compared to the comparative examples. In addition, the tensile strength was lowered as the inorganic content was increased in the examples, but the strength and elongation were higher than those of the reflective film of the conventional comparative example, and the strength and elongation were significantly increased as the coating amount of the protective layer was increased. It can be seen that the characteristics of the reflective film for agriculture is improved. In the above table, MD means longitudinal direction and CD means transverse direction.

The agricultural reflective film according to the present invention improves the physical properties of the conventional reflective film, prevents oxidation and dropout of the aluminum thin film layer as a protective layer, improves workability when used in the field, increases efficiency, and improves wrinkles and gloss when manufacturing products. In addition to maintaining, the elongation and strength are greatly improved, making it suitable for reflective, architectural, industrial and agricultural reflective films.

Claims (8)

In the method of manufacturing an agricultural reflective film formed by depositing an aluminum thin film layer on a base paper made of a synthetic resin film, forming an aluminum thin film layer on a base paper formed of at least one selected from OPP, CPP, PET, PE film of a multi-layer structure, the aluminum A protective layer is formed on the thin film layer to prevent oxidation and gloss protection of the aluminum thin film, to enhance strength and to prevent wrinkles, and the protective layer includes zeolite, seven stone, bentonite, tourmaline, germanium, elvan, shell, illite, charcoal and activated carbon. , At least one antimicrobial inorganic material selected from calcium carbonate, talc, aluminum hydroxide, ocher, and ceramics is formed into a granule having a size of 100 to 1000 mesh to a thickness of 0.005 to 0.100 mm, including 0.1 to 60% by weight of the protective layer. Agricultural reflective film manufacturing method comprising the step of. The method of claim 1, wherein the PE multilayer film is a film of a laminated structure by melting PE and PP in each of the raw material tank and extruding two films, and melted and extruded the selected material from HDPE, LLDPE, LDPE and laminated in multiple layers Agricultural reflective film manufacturing method, characterized in that selected from the film of the structure. The method of claim 1, wherein the forming of the protective layer is an agricultural reflective film production, characterized in that carried out by uniformly mixing the granular inorganic material with any one selected from PE, PS, vinyl chloride resin, acrylic resin. Way. According to claim 1 or 2, wherein the protective layer forming step is coated with any one selected from PE wax, PP wax, LP wax, and then sprayed and dried by spraying the granular inorganic material, characterized in that performed for agriculture Reflective film manufacturing method. According to claim 1 or 2, wherein the protective layer forming step is carried out by spraying the granular inorganic material when laminating any one selected from PE, PS, PP, biodegradable film, breathable film, paper, nonwoven fabric. Agricultural reflective film manufacturing method. According to claim 1 or 2, wherein the protective layer forming step 99 to 50% by weight of any one selected from LDPE, LLDPE, HDPE, PE wax, PP wax, LP wax mixed any one selected from 1 to 50% by weight After coating, by spraying the granular inorganic material, the manufacturing method of the agricultural reflective film, characterized in that carried out by pressing, drying. Agricultural reflective film prepared according to claim 1.  The reflective film of claim 7, wherein a plurality of drainage holes are formed.