KR101337898B1 - Multi-layered reflective sheet and the manufacturing method thereof, and fallen fruit protecting and sunlight reflecting product for fruit farming which are made of the sheet - Google Patents

Abstract

The present invention relates to a reflective sheet having a multilayer structure, a method of manufacturing the sheet, and a sheet product for falling protection and sun reflection produced using the sheet, wherein the multilayer sheet according to the present invention comprises a plurality of air caps. The reflective film layer is laminated on at least one air bubble layer arranged. The air bubble layer is interposed between a pair of outer layered paper formed of a plurality of air caps, the outer layer is configured to face each other with the air cap in between. A light reflecting film is formed below the reflective film layer. The light reflecting film may be an aluminum film deposited under the transparent reflecting film layer. Alternatively, the reflective film layer itself may be constituted by a colored film having a reflective function.

Description

Multi-layered reflective sheet and the manufacturing method according to the present invention, and fallen fruit protecting and sunlight reflecting product for fruit farming which are made of the sheet}

The present invention relates to a reflective sheet having a multi-layered structure that can be used as a sheet for protecting fruit and sunlight for use in cultivating fruit trees, a method of manufacturing the same, and a sheet product for protecting fruit and sun reflecting produced using the same.

In fruit-growing farms, the fruit is covered with paper, packaging, sheets, etc. to protect the fruit from pests, to combat algae, and to protect the fruit from falling. It can be used to wrap fruits using ordinary paper or wires that can be found nearby, or products that are released in the form of sheet materials or wrapping paper for fruit protection. Recently, it is also sold as a fruit protective bag for convenience.

In any case, however, farmers will have to work on manual fruit packing, which will significantly reduce the cost-effectiveness. In addition, due to diversified climate change, the fruits are not sufficiently protected in case of falling due to natural disasters such as heavy rains and strong winds. It is happening.

On the other hand, it is common to provide a solar reflector between the lower part of the orchard. By reflecting sunlight into the lower part of the fruit tree using a reflector plate, it increases the sugar content of the fruit, prevents insects from living in the fruit due to the reflection of the sun, suppresses moisture evaporation on the ground, and minimizes the occurrence of weeds. Usually, the solar reflector is installed on the bottom of the fruit tree so that the sunlight is reflected on the shaded lower part of the fruit tree, and the silver foil made of PP (polypropylene) or PET (polyethylene terephthalate) material of thin thickness (approximately 20 to 60 μm) Film is mainly used. Solar reflectors are also available in a variety of products.

However, these conventional reflective films are light and thin, so they can be torn or easily broken by light winds, so there is not only an economic loss to use and dispose of in one year, but they also rot if they are buried in the ground to save disposal costs. Because this material is not used, it may adversely affect the environment. In addition, due to the silver foil coating material used to enhance the reflection effect, the surface temperature rise due to direct sunlight exceeds 80 ℃, causing burns on the body and adversely affects vision due to diffuse reflection.

The present invention solves the problems of the prior art described above by increasing the robustness when used for fall protection and solar reflection applications can be reused for many years, environmentally friendly, multi-layer that can solve the problems according to the reflectance by reducing the reflectance below the appropriate value An object of the present invention is to provide a structural reflective sheet and a method of manufacturing the same.

Another object of the present invention is to provide a sheet product for fall protection and sunlight reflection that can be used in the fruit growing farm, produced using the multilayer structure reflective sheet and its manufacturing method.

According to an aspect of the present invention for achieving the above object, there is provided a reflective sheet of a multi-layered structure in which a reflective film layer is laminated on at least one or more air bubble layer in which a plurality of air caps are arranged.

According to another aspect of the invention, there is provided a method for manufacturing a reflective sheet having a multi-layer structure comprising the step of laminating a reflective film layer on at least one air bubble layer is arranged a plurality of air caps.

The one layer of the air bubble layer may be interposed between a pair of outer layer paper is formed of a plurality of air caps, the outer layer paper facing each other with the air cap between. Here, the thickness of each air bubble layer is about 4mm, the diameter of the air cap may be formed to about 10 ~ 50mm. The outer layer paper or the middle layer paper can use polyolefin resin.

On the other hand, by stacking a plurality of the air bubble layer of one layer it is possible to configure a multi-layer air bubble layer. Alternatively, in order to form a multi-layer air bubble layer, the outer layer paper constituting the air bubble layer of one layer is disposed up and down so as to have a desired number of layers, and the air bubble layer having a multi-layer structure is formed between the outer layer papers through an air cap interlayer paper. May be formed one-step.

Economics can be increased by such batch production or one-step production. In addition, since the air bubble layer is laminated in one or more layers in addition to the single reflective layer, the firmness of the final product is increased.

A light reflecting film is formed below the reflective film layer. The light reflecting film may be an aluminum film deposited under the transparent reflecting film layer.

Alternatively, the reflective film layer itself may be constituted by a colored film having a reflective function. When the reflective film layer is formed of the colored film, even if the reflectance is somewhat reduced, the damage caused by the high temperature, which is a problem due to the high solar reflectance, is reduced.

That is, in the present invention, it is possible to produce a product that maximizes the reflectance by using aluminum as a reflecting film as in the conventional art, but it is also possible to appropriately adjust the reflectance by using a colored film.

The colored film can be produced in various colors. For example, a white film is known to have a reflectance of approximately 93%. In addition to white, it can be colored in all colors such as yellow, blue and green. Since the reflectance is different for each color, it is possible to produce a variety of reflector products to have an optimal reflectance for crops.

The thickness of one layer of the reflective film layer may be about 30 ~ 200μm.

A bonding method may be used to stack the reflective film layer on the air bubble layer, and the reflective film layer may be formed integrally with the air bubble layer and simultaneously with the air bubble layer in a single process.

The durability reinforcing layer for reinforcing the durability of the multilayer sheet described above may be further laminated on the lower portion of the air bubble layer by thermal fusion or the like. By this durability reinforcement layer, the firmness or durability of the multilayer sheet according to the present invention can be further enhanced. The durable reinforcing layer may be formed of a nonwoven fabric or a woven tarpaulin, but is not limited thereto. The thickness per layer of the durable reinforcing layer may be about 30 ~ 200μm. .

The multi-layered sheet according to the present invention is economical compared to other products because it is possible to produce one-step, and it is possible to easily obtain the effects of the conventional products with only one construction and from natural disasters caused by the rapidly changing climate. Minimize damage to fruit farms.

In addition, the multilayer sheet according to the present invention can be reused while being stored for many years, compared to the conventional use only once, it can reduce the economic burden. In addition, the sheet of the present invention can be recycled because it can be used as the main material (polyethylene) is environmentally friendly.

In addition, since the air layer is included in the sheet, the impact absorption rate is 1000 times higher than that of the conventional thin single-film film, thereby minimizing the breakage of fruit when falling, thereby increasing the amount of fruit that can be shipped as a product. In addition, even if not even fruit products, it is possible to use enough as other useful products (for example, jams and processed foods, etc.) can greatly reduce the economic damage of the farmhouse.

As the material of the reflective layer can be used not only for silver foil but also for various purposes (for example, white film), it is possible to minimize the inconvenience in using without changing the overall function, and the thermal conductivity is lower than that of the conventional film due to the characteristics of the multilayer structure. Therefore, the secondary effect of minimizing the evaporation of water from the ground and having a good effect on the nutrition of fruit trees can be obtained.

1 is a cross-sectional view of the basic configuration of a multilayer sheet according to the present invention.
FIG. 2 is a detailed configuration diagram of the air bubble layer 110 of FIG. 1.
3 is a detailed block diagram of another embodiment of the air bubble layer 110 of FIG. 1.
4 is a cross-sectional view of another embodiment of a multilayer sheet according to the present invention.

1 shows a layer structure of a multilayer sheet 100 according to the present invention. The reflective film layer 120 is stacked on the air bubble layer 110. Although FIG. 1 illustrates that the air bubble layer 110 is stacked in one layer, the air bubble layer 110 may be stacked in two or more layers according to an embodiment.

The detailed structure of the air bubble layer 110 is illustrated in FIG. 2. In FIG. 2, the air bubble layer 110 has an air cap 113 filled with air in a planar manner, that is, arranged in a two-dimensional form. To reduce the impact on the impact plate, when used as a reflector also has the effect of suppressing heat conduction. Of course, the firmness of the sheet is increased and can be reused for many years.

The air bubble layer 110 is bonded by a pair of polyolefin-based outer layer paper 111, the middle layer paper 112 formed by a plurality of air caps 113 by thermocompression bonding, so that the outer layer paper 111 is It may be configured to face each other with the air cap 113 therebetween.

In another embodiment, in order to form the air bubble layer 110 in multiple layers, 1) a plurality of unit air bubble layers having the structure shown in FIG. 2 may be bonded and laminated, and 2) the number of layers of the polyolefin-based outer layer paper 111 is desired. The air bubble layer 110 ′ of the multilayer structure may be produced one-step through the air cap interlayer paper 112 and disposed in the vertical direction. A multi-layered air bubble layer formed by the latter method 2) is shown in FIG. 3.

When the latter method 2) is used, the upper middle layer paper 112 and the lower middle layer paper 112 share the outer layer paper 111 located in the middle, rather than lamination by the former method 1). The thickness of the entire air bubble layer 110 ′ may be reduced, and production costs may be reduced, such as a reduction in material requirements. However, since either method has its advantages and disadvantages, those skilled in the art can select the method according to their convenience or circumstances.

In one embodiment, the thickness of each air bubble layer 110 shown in Figures 1 and 2 is 4mm, the diameter of the air cap 113 shown in Figure 2 is 10 ~ 50mm.

1, the reflective film layer 120 is a thin film formed of a material such as PE, PP, PET. In order to increase the reflectance, a reflective film 121 is formed at the lower portion, so that the sunlight passes through the reflective film layer 120 and is reflected by the reflective film 121.

Aluminum deposition may be used to form the reflective layer 121. When the aluminum deposition is performed on the reflective film layer 120, since the deposited film is easily damaged or oxidized by the atmosphere, it is preferable to deposit it under the transparent PE, PP, or PET film layer.

In another embodiment, the reflective film layer 120 may be configured using a colored film (hereinafter, referred to as a colored film) instead of aluminum deposition. In this embodiment, although the reflectance is lower than that of aluminum deposition (about 10 to 15%), there is an effect that the surface temperature caused by the reflection of sunlight does not rise too much. Therefore, the idea of the present invention can be realized by producing a product having various reflectances by adjusting the reflectance of the sheet for various colors.

The colored film can be produced in various colors. That is, the reflectance may be reduced by coloring with white, which is known to have a reflectance of about 93%, than in the case of aluminum deposition. In addition, the reflectance may be variously adjusted by coloring with other colors such as yellow, blue, and green.

The reflective film layer 120 may be laminated on the air bubble layer 110 by adhesion or the like, or may be produced simultaneously with the air bubble layer 110 in a single process or in an integrated production manner, that is, one-step. .

Meanwhile, as shown in FIG. 4, the durability reinforcement layer 130 may be further bonded to the lower portion of the air bubble layer 110. The durability reinforcement layer 130 may further strengthen the durability of the multilayer sheet according to the present invention, and may more effectively protect the sheet from protrusions, harmful animals and other influences on the ground when the multilayer sheet is used. Various materials may be used as the durability reinforcement layer 130. For example, a nonwoven fabric or a woven tarpaulin can be used.

According to one embodiment, the thickness of each layer of the film (that is, the reflective film layer 120, the durability reinforcement layer 130) from above is 30 ~ 200μm.

Hereinafter, the method of manufacturing the multilayer sheet demonstrated above is demonstrated. The method of manufacturing a multilayer sheet according to the present invention includes a process of laminating the reflective film layer 120 on at least one or more air bubble layers 110.

Here, one layer of the air bubble layer 110 is bonded to a pair of polyolefin-based outer layer paper 111 by bonding a multi-layer paper 112 formed by a plurality of air caps 113, such as by thermocompression bonding, to form an outer layer paper. 111 may be manufactured to face each other with the air cap 113 therebetween.

In order to manufacture the air bubble layer 110 in multiple layers, a plurality of unit air bubble layers shown in FIG. 2 may be manufactured by laminating, or the polyolefin-based outer layer paper 111 may be disposed up and down according to a desired number of layers, and an air cap middle layer therebetween. The paper 112 may be bonded to each other to manufacture the air bubble layer 110 ′ having a multi-layer structure in one step.

The reflective film layer 120 is made of a material such as PE, PP, PET. The reflective film 121 is formed below the reflective film layer 120 to increase the reflectance. As a result, sunlight passes through the reflective film layer 120 and is reflected by the reflective film 121.

Aluminum deposition may be used to form the reflective layer 121. In another embodiment, the reflective film layer 120 may be manufactured using a white film instead of aluminum deposition.

The reflective film layer 120 may be laminated on the air bubble layer 110 by adhesion or the like, or may be manufactured simultaneously with the air bubble layer 110 in a single process, that is, one-step.

In addition to the reflective film layer 120 and the air bubble layer 110 described above, the durability enhancement layer 130 may be further bonded to the lower portion of the air bubble layer (110). The durable reinforcement layer 130 may be integrally bonded to the lower portion of the air bubble layer 110 using, for example, a non-woven fabric or a woven tarpaulin (tarpaulin) using a thermal fusion method.

By using the multilayer reflective sheet and the manufacturing method described above, it is possible to manufacture and commercialize a sheet product for falling protection and solar reflection of a specific form. When manufacturing these products, it is possible to increase the ease of use by forming eyelets in place to penetrate each layer. Eyelets are small holes for inserting strings, poles, etc., so that users of products produced by applying the present invention can be conveniently used.

As described above, the multilayer sheet and the manufacturing method thereof according to the present invention have been described with reference to the accompanying drawings, but various modifications and changes can be made without departing from the spirit of the present invention. Therefore, the scope of the present invention should not be limited to the described embodiments, but should be defined by the following claims and their equivalents.

Multi-layer sheet 100 Air bubble layer 110 Multi-layer air bubble layer 110 ′ Outer layer paper 111 Interlayer paper 112 Air cap 113 Reflective film layer 120 Reflective film 121 Durable reinforcement layer 130

Claims (14)

delete delete Interposed between a pair of outer layered paper, which is formed of a plurality of layered air caps, wherein the outer layered paper is laminated on at least one or more layers of air bubble layers arranged to face each other with the air caps interposed therebetween. Reflective film layer,
Reflective sheet having a multi-layer structure characterized in that it comprises a light reflecting film formed on the lower portion of the reflective film layer. 4. The reflective sheet of claim 3, wherein the reflective film layer is a colored film having a reflective function. The reflective sheet of claim 3, wherein a durability reinforcement layer for reinforcing the durability of the multilayer sheet is further stacked below the air bubble layer. 6. The reflective sheet of claim 5, wherein the durability reinforcing layer is formed using a material selected from nonwoven fabric and woven tarpaulin. delete delete At least one layer of air caps arranged in a plurality of air caps by a process of interposing a middle layer paper in which a plurality of air caps are formed between a pair of outer layer papers and forming the outer layer papers facing each other with the air caps interposed therebetween. Laminating a reflective film layer on the bubble layer,
And forming a light reflective film under the reflective film layer. 10. The method of claim 9, wherein the reflective film layer is a colored film having a reflective action. The method of claim 9, further comprising laminating a durability reinforcement layer under the air bubble layer to reinforce the durability of the multilayer sheet. The method of claim 11, wherein the durability reinforcing layer is formed using a material selected from a nonwoven fabric and a woven tarpaulin.

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