KR101782293B1 - Reinforced composite film - Google Patents

Abstract

The present invention relates to a reinforced composite film capable of being manufactured at low costs; has excellent properties of resilience, flexibility, lightweight, water resistance, and heat resistance; cannot easily be torn or broken even if an external force is applied; and is able to be used semi-permanently even if the reinforced composite film is repeatedly bent. According to the present invention, the reinforced composite film comprises: first and second flexible layers, each of which disposed to face each other having flexibility; a mesh layer disposed between the first flexible layer and the second flexible layer; a main coupling layer disposed between the first flexible layer and the mesh layer and between the second flexible layer and the mesh layer, and coupling the mesh layer with the first and second flexible layers while the same coming in surface contact with the mesh layer; and joint parts, each of which has a shape corresponding to each other, penetrating first and second flexible layers through which a part of the mesh layer is exposed to the outside wherein at least two joint parts are formed at intervals. In addition, the first and second flexible layers are partitioned to at least three areas by the joint parts while being coupled with the mesh layer by the melting of the main coupling layer.

Description

[0001] Reinforced composite film [

More particularly, the present invention relates to a composite reinforcing film which can be produced at low cost and has excellent properties such as durability and stability, flexibility, light weight, water resistance and heat resistance, and is easily torn or broken even when an external force is applied But also to a composite reinforcing film that can be used semi-permanently even if repeatedly bent.

Hereinafter, the present invention will be described by using toys for convenience of explanation, but the present invention is applicable to various fields other than those limited to toys.

Various types of toys are sold on the market to allow young children to play with them. These toys vary in material, size, and shape depending on their type. In recent years, many toys made of paper materials have been released to allow children to play safely.

Paper-based toys are very lightweight and are not easily damaged by impacts, and are hard or sharp, making them very safe for children to play with.

However, due to the nature of the paper, it is vulnerable to water, and if the bending and spreading operations are repeated, there is a problem that the shape can not be maintained and it is wrinkled or torn.

Particularly, when a paper material is applied to a component that plays a role of a joint bending repeatedly in a toy part, the problem of separating or tearing into multiple layers along the direction of the paper can not be maintained for a long time.

Accordingly, the present applicant has found that the present applicant can manufacture at low cost and is excellent in properties such as durability and stability, flexibility, light weight, water resistance and heat resistance, and is not easily torn or broken even when an external force is applied, We have developed a composite reinforced film that can be used semi-permanently.

The embodiments of the present invention can be manufactured at low cost and have excellent physical properties such as durability and stability, flexibility, light weight, water resistance, and heat resistance, and are not easily torn or broken even when an external force is applied, The present invention also provides a composite reinforcing film which can be used semi-permanently even if it is used as a base film.

To achieve these and other advantages and in accordance with the purpose of the present invention, as embodied and broadly described herein, there is provided a composite reinforcement film comprising: a first flexible layer and a second flexible layer which are positioned facing each other and have flexibility; a mesh layer positioned between the first flexible layer and the second flexible layer; A main binding layer positioned between the first flexible layer and the mesh layer and between the second flexible layer and the mesh layer to bind the mesh layer and the first and second flexible layers in a surface contact state, Wherein the first and second flexible layers are formed in a shape corresponding to the shape of the first and second flexible layers so as to face each other to expose a part of the mesh layer to the outside, And is bound together with one mesh layer by melting of the main binding layer in a state of being divided into regions.

The present invention has the following various effects.

First, the composite reinforced film according to the present invention is excellent in water resistance and heat resistance, and can be applied to various environments and products.

Second, the composite reinforced film according to the present invention is excellent in light weight and is easy to carry and move even when applied to a bulky product.

Third, the composite reinforced film according to the present invention is excellent in durability, restoration, and flexibility, and is not easily broken even when impact is applied. Even if the flexible layer is bent by an external force, the composite reinforcement film is restored to its initial state in a short time.

Fourth, the composite reinforced film according to the present invention secures a bending angle close to -180 ° to + 180 ° by allowing the flexible layer to bend without deforming the mesh layer itself.

Fifth, the composite reinforced film according to the present invention can be used semi-permanently by preventing a tear or breakage even if it is repeatedly bent by applying a mesh layer of a fabric material.

1 is a view showing a laminated structure of a composite reinforcing film according to the present invention.
2 is a photograph of an actual product showing a laminated structure of the composite reinforced film according to the present invention.
FIG. 3 is a view showing a joint portion formed in a flexible layer of a composite reinforcing film according to the present invention, the joint portion being symmetrical with respect to a virtual center line.
4 is a view showing a state in which the mesh layer is placed on the flexible layer of the composite reinforcing film according to the present invention.
5 is a view showing a joint portion of the composite reinforcing film according to the present invention.
6 is a view showing a state in which the composite reinforcing film according to the present invention is folded from the joint portion.
7 is a flowchart of a method for manufacturing a composite reinforced film according to the present invention.

Hereinafter, an embodiment of the present invention will be described with reference to the accompanying drawings, and the same reference numerals are given to the background art and the constituent elements of the constitution which have already been described.

In addition, the description of the composite reinforced film of the present invention is not intended to limit the present invention to the preferred embodiments, but may be embodied in various forms, and the shape, size, And can be variously modified if the same / similar effect can be implemented.

1 to 4, the composite reinforced film 1 according to an embodiment of the present invention includes a first flexible layer 200, a second flexible layer 500, a mesh layer 400, Layer 300 as shown in FIG.

The first flexible layer 200 and the second flexible layer 500 form a top plate and a bottom plate on the basis of the mesh layer 400 to be described later to form the overall shape of the composite reinforced film 1, So that it can be bent and restored without being broken or broken.

In this embodiment, the first flexible layer 200 and the second flexible layer 500 are formed of the same kind of layers, but they may be formed of different layers.

In this embodiment, the surface layer 210, the reinforcing layer 230, and the sub-binding layer 220 are used to facilitate the surface printing and ensure proper physical properties such as rigidity, hardness, strength, durability, Layer 200 and the second flexible layer 500 are formed, but it is also possible to form the first and second flexible layers 500 and 500 as one layer rather than a multilayer.

The surface layer 210 is a layer of a synthetic resin material located on the outermost side of the composite reinforcing film 1, and characters, pictures, figures, colors, etc. of various shapes can be printed on the surface as required.

The thickness of the surface layer 210 affects the printing state and processability. When the thickness is more than 30 μm or less than 20 μm, the printing is not normally performed and the workability is degraded. Therefore, the thickness of the surface layer 210 is preferably 20 μm to 30 μm Mu m thickness.

The reinforcing layer 230 is a layer for reinforcing the physical properties of the surface layer 210 and is bound to the lower surface of the surface layer 210 by the subbing layer 220.

That is, when the surface layer 210 made of a synthetic resin is formed to have a thickness of 20 to 30 탆, the physical properties such as rigidity, hardness, strength, and durability are inferior although the printing and workability are excellent, and the first and second flexible layers 200 and 500 ) Itself is too loose and can not maintain a flat shape when it is lifted, so it is bent easily, so that the reinforcing layer 230 is used to compensate for the lack of characteristics.

The surface layer 210 and the reinforcing layer 230 may be formed of different materials. However, in this embodiment, CPET material among PET (polyethylene terephthlate) materials is applied in order to obtain excellent physical properties.

The CPET material has a high heat resistance and is resistant to thermal deformation and has a merit of being 1/7 the price compared with the thermosetting resin. Of course, it is possible to apply APET material instead of CPET material, but it is preferable to apply CPET material because APET material is more resistant to thermal deformation than CPET material.

The thickness of the reinforcing layer 230 affects the physical properties of the composite reinforcing film 1. If the thickness is less than 240 탆, the strength is insufficient to easily bend. When the thickness exceeds 260 탆, It does not improve. Therefore, it is preferable that the reinforcing layer 230 is formed to a thickness of 240 탆 to 260 탆 in order to secure optimum physical properties.

The binding layer 220 binds the surface layer 210 and the reinforcing layer 230. When the layer is formed to a thickness of less than 5 m, the binding force is lowered. When the thickness exceeds 10 m, the binding force is not increased any more. The thickness of the first and second flexible layers 200 and 500 themselves is too thick and heavy, so that it is preferable to form the first and second flexible layers 200 and 500 to a thickness of 5 to 10 μm.

Although ethylene-vinyl acetate (EVA) is applied to the sub-binding layer 220 and the main binding layer 300 in this embodiment, various types of adhesive members and bonding methods can be applied as long as they can perform the same function.

The first and second flexible layers 200 and 500 may be formed of one layer or a plurality of layers. The first flexible layer 200 and the second flexible layer 500 may have joint portions 240 formed in a predetermined shape, .

The joint portion 240 is configured to expose the mesh layer 400 located between the first flexible layer 200 and the second flexible layer 500 to the outside. The first joint layer 240 is formed on the first flexible layer 200, And the second joint portion 242 formed on the second flexible layer 500 are positioned facing each other.

As shown in FIGS. 5 and 6, the joint portion 240 becomes a folded portion when a force is applied to the composite reinforced film 1, and the joint portion 240 is formed to penetrate the first and second flexible layers 1 and 2. Therefore, Only the mesh layer 400 is folded without being bent or folded directly.

The joint portion 240 formed in the first and second flexible layers 200 and 500 is formed to penetrate both the print layer 100, the surface layer 210, the subbing layer 220 and the enhancement layer 230 to form the mesh layer 400 The first flexible layer 200 is partitioned from the first joint portion 241 and the second flexible layer 500 is partitioned from the second joint portion 242 .

That is, as shown in FIG. 5, when a plurality of joint portions 240 are formed, it is possible to form various regions and directions that can be bent even in the same plane.

The mesh layer 400 is bonded to the first flexible layer 200 and the second flexible layer 500 to have excellent durability and is disposed between the first flexible layer 200 and the second flexible layer 500 do.

The mesh layer 400 functions not only to prevent the first and second flexible layers 200 and 500 made of synthetic resin from being torn, but also to function as a kind of hinge and joint by being exposed to the outside by the joint portion 240 .

That is, when the first and second flexible layers 200 and 500 themselves made of synthetic resin are repeatedly bent, the shape is not restored due to deformation, and the durability of the first and second flexible layers 200 and 500 is very weak, So that the mesh layer 400, rather than the two flexible layers 200 and 500, is bent.

The mesh layer 400 may be applied to various materials such as synthetic resin, metal, and fabric. However, in this embodiment, the mesh layer 400 is applied as a fabric material to ensure excellent durability against bending.

When the mesh layer 400 is applied as a fabric material, it is not broken or deformed even when repeated folding and unfolding operations are performed.

In addition, when the flexible layers 200 and 500 themselves are bent, the upper surface is stretched and the lower surface is compressed, so that the bending is not smooth and the bending angle is also narrowed. In order to bend the mesh layer of the fabric material itself A bending angle close to -180 ° to + 180 ° can be secured.

In the case of general fabrics, there is a grain direction, which tears easily along the grain direction when shear stress and torsional stress are applied. Therefore, in the present embodiment, a mesh layer 400 made of a ripstop material is applied to solve the above disadvantages. In the case of a lipspeed, there is no direction of a grain, so that it is not torn easily regardless of the direction in which an external force is applied. .

The main binding layer 300 is formed by binding the first flexible layer 200 with the mesh layer 400 and the second flexible layer 500 with the mesh layer 400 and may be formed of one layer or two or more layers And can be applied not only to the hot melt EVA of the present embodiment, but also to a variety of adhesive films, liquid adhesives, and the like.

The main binding layer 300 may be formed as one main binding layer 300 so that the entire mesh layer 400 is accommodated in the main binding layer 300. The first main binding layer 310 and It is also possible to form the second main binding layer 320, that is, the two layers, and bind both sides of the mesh layer 400 to each other.

When the first main binding layer 310 and the second main binding layer 320 are melted and bonded together by heating, if the meshes (holes formed in the mesh) formed on the mesh layer 400 are large, 2 main binding layers 310 and 320 are passed and fused to each other. Therefore, the two main binding layers 310 and 320 are formed as one layer.

The first main binding layer 310 binds the first flexible layer 200 and the mesh layer 400 and the second main binding layer 320 bonds the second flexible layer 500 and the mesh layer 400 The bonding strength between the mesh layer 400 and the first and second main binding layers 310 and 320 is very important for ensuring sufficient durability of the composite reinforcing film 1. [

That is, when the bonding force between the mesh layer 400 and the first and second main binding layers 310 and 320 is weak, there is a problem that the mesh layer 400 and the first and second flexible layers 200 and 500 are separated during repetitive bending It is important to secure a high bonding force and to secure a high bonding force between the mesh layer 400 and the first and second main binding layers 310 and 320, the thickness of the first and second main binding layers 310 and 320 and the thickness of the mesh layer 400 ) Is very important.

When the thickness of the first and second main binding layers 310 and 320 is less than 70 탆, the adhesive strength is weakened. When the thickness of the first and second main binding layers 310 and 320 is less than 80 탆, the adhesive strength is not increased.

When the mesh layer 400 is more than 75 denier, the first and second main binding layers 310 and 320 melt and pass through the mesh and are fused together. Therefore, when the mesh layer 400 is 75 denier or less, The two main binding layers 310 and 320 are bound to both sides of the mesh layer 400 separately without passing through the mesh.

In this case, if the bonding force between the mesh layer 400 and the first and second main binding layers 310 and 320 is not strong, the first and second main binding layers 310 and 320 are easily separated and broken. Therefore, the surface of the mesh layer 400 is coated with another urethane, It is preferable to maximize the bonding force between the first electrode layer 310 and the second electrode layer 320 and the mesh layer 400.

Hereinafter, a method for manufacturing a composite reinforced film according to the present invention will be described, and the same description as that described above will be omitted.

As shown in FIG. 7, the composite reinforcing film 1 according to the present invention includes a preparation step (S100) and a main binding step (S200).

In the preparation step S100, a pair of main binding layers 300 are positioned between a pair of flexible layers 200 and 500 having flexibility, and the flexible layers 200 and 500 and the main binding layer 300 are formed into a predetermined shape The main bonding layer 300 may be formed between the flexible layers by a separate structure such as a film or the like by forming the penetrating joint portion 240 and positioning the mesh layer 400 between the pair of main binding layers 300 200,500) and may be formed on the inner surface of the flexible layer 200 or 500 facing the flexible layer 200 or 500 by coating as in the present embodiment.

The preparing step S100 includes a printing step S110, a first sub binding step S120, a second sub binding step S130, a patterning step S140, a laminating step S160 and a main binding step S200 .

The printing step S110 is a step of forming the printing layer 100 such as a pattern, a picture, and a figure on the surface layer 210, and the printing layer 100 can be formed by various methods.

The first sub-bonding step S120 is a step of binding the surface layer 210 and the reinforcing layer 230 using the sub-binding layer 220 to form the flexible layers 200 and 500. The reinforcing layer 230 (240 to 260 m) Is formed thicker than the surface layer 210 (20 占 퐉 to 30 占 퐉) to enhance the physical characteristics of the surface layer 210 formed to be relatively thin.

The surface layer 210 of the flexible synthetic resin material (CPET) and the reinforcing layer 230 are bound together by the subbing layer 220 of the EVA material (hot melt) and use the dry lamination method.

That is, after the film-type EVA sub-binding layer 220 is positioned between the surface layer 210 and the reinforcing layer 230, the binder is heated and pressed at a temperature of about 40 ° C to 50 ° C, The thickness of the surface layer 210 is 20 to 30 占 퐉, which is extremely thin and can be thermally deformed, so that it is preferable that the surface layer 210 does not exceed 50 占 폚.

The second sub-bonding step S130 is a step of forming a main binding layer 300 of EVA material (hot melt) in the reinforcing layer 230 in which the first sub-bonding step S120 is completed. The main binding layer 300 is first formed on the surface of the reinforcing layer 230, not the binding layer 230.

When the patterning step S140 is performed in a state where the reinforcing layer 230 and the mesh layer 400 are bound together, the joint layer 240 may penetrate the mesh layer 400, So that it is preferable to perform it stepwise.

In this second sub-bonding step S130, heat is applied to the raw material of the EVA material (hot melt) at a temperature of 70 DEG C to 80 DEG C to form a main binding layer 300 having a thickness of 70 mu m to 80 mu m on the surface of the reinforcing layer 230 ). At this time, since the surface layer 210 and the reinforcing layer 230 are bonded through the first sub-bonding step S120, thermal deformation does not occur even when heat is applied at a temperature of 70 to 80 DEG C, Can occur.

The laminating step S160 is a step of forming a pair of flexible layers 200 and 500 so that each reinforcing layer 230 faces each other and a mesh layer 400 of a fabric material is formed therebetween. In this laminating step S160, it is also possible to overlap the first flexible layer 200 and the second flexible layer 500, which are individually provided, and insert the mesh layer 400 therebetween. However, in this case, the first and second flexible layers 200, It is very difficult to precisely align the rim of the layers 200 and 500 with the joint part 240, and there is a disadvantage that the manufacturing process and the manufacturing apparatus are increased, and the cost of the product is increased eventually.

Therefore, in order to solve such a disadvantage in the present embodiment, the first flexible layer 200 having the main binding layer 300 formed thereon is folded with respect to the imaginary center line L and the pair of flexible layers 200 and 500 And the surface layer 210, the sub-binding layer 220, the reinforcing layer 230, and the main binding layer 300 are all formed as a pair.

The mesh layer 400 to be inserted between the pair of flexible layers 200 and 500 is applied to a mesh layer 400 made of a ripstop material and the ripstop can be easily torn It is possible to secure excellent durability.

The patterning step S140 is a step of forming a joint part 240 passing through the flexible layers 200 and 500 and the main binding layer 300 in a predetermined shape. The patterning step S140 may also include forming the first joint portion 241 and the second joint portion 242 having the same shape in the first flexible layer 200 and the second flexible layer 500 individually provided However, in such a case, it is very difficult to stack the first joint portion 241 and the second joint portion 242 so as to accurately overlap in the stacking step S160.

Therefore, in this embodiment, the first flexible layer 200 having the main binding layer 300 formed thereon has the first joint portion 241 symmetrical with respect to the imaginary center line L, The first flexible layer 200 is folded in half with respect to the imaginary center line L in the stacking step S160 so that the first joint portion 241 and the second joint portion 242 are formed. Are correctly overlapped.

The main binding step S200 is a step of binding the pair of flexible layers 200 and 500 by melting the main binding layer 300 using a laminating method after the laminating step S160 is completed, It is preferable to heat the EVA material at a temperature of 110 ° C to 140 ° C in order to melt the main binding layer 300 made of EVA.

At this time, since the pair of flexible layers 200 and 500 are laminated to each other, the surface layer 210 or the reinforcing layer 230 is not thermally deformed even when heated to a temperature of 110 ° C to 140 ° C, It can be thermally deformed itself.

In this main binding step S200, the first main binding layer 310 and the second main binding layer 320 previously formed in the reinforcing layer 230 are melted and bound to the mesh layer 400, and the mesh layer 400 The first main binding layer 310 and the second main binding layer 320 can be fused with each other through the mesh layer 400 according to the mesh size of the mesh layer 400. In addition, Can be bound.

Meanwhile, the composite reinforced film manufacturing method according to the present invention may include a mesh coating step (S150) of coating urethane on the surface of the mesh layer 400 before the laminating step (S160).

The mesh coating step S150 is for increasing the binding force between the main binding layer 300 and the mesh layer 400 in the main binding step S200. As described above, when the mesh layer 400 is more than 75 denier The first main binding layer 310 and the second main binding layer 320 are fused with each other through the mesh layer 400 so that the binding force becomes very strong. However, when the densities are less than 75 deniers, the first main binding layer 310 and the second main binding layer 320 can not pass through the mesh layer 400, (Not shown).

Therefore, when the mesh layer 400 is 75 denier or less, the surface of the mesh layer 400 is coated with urethane in order to maximize the bonding force between the main binding layer 300 made of a synthetic resin material and the mesh layer 400 made of a fabric material desirable.

In this embodiment, the mesh coating step (S150) is performed by inserting the mesh layer (400) in a solvent in which urethane is dissolved and then drying, but various methods can be applied as long as the same effect can be achieved.

In the above description, bending refers not only to bending, but also to bending, folding, and breaking.

1: composite reinforced film 100: printing layer
200: first flexible layer 210: surface layer
220: sub-binding layer 230: reinforcing layer
240: joint part 300: main binding layer
400: mesh layer 500: second flexible layer
S100: preparation step S110: printing step
S120: First sub-binding step S130: Second sub-binding step
S140: Patterning step S150: Mesh coating step
S160: Stacking step S200: Main bonding step

Claims (3)

A first flexible layer and a second flexible layer facing each other and having flexibility;
A mesh layer positioned between the first flexible layer and the second flexible layer;
A main binding layer positioned between the first flexible layer and the mesh layer and between the second flexible layer and the mesh layer to bind the mesh layer and the first and second flexible layers in a surface contact state; And
And a joint portion formed in a shape corresponding to the first and second flexible layers so as to face each other to expose a part of the mesh layer to the outside,
Wherein the first and second flexible layers are bound to one mesh layer at the same time by melting the main binding layer in a state of being divided into at least three regions by a joint portion.
The method according to claim 1,
Wherein at least one of the first flexible layer and the second flexible layer comprises:
A surface layer made of synthetic resin,
A reinforcing layer made of synthetic resin reinforcing the physical properties of the surface layer,
And a sub-binding layer for binding the surface layer and the reinforcing layer.
The method according to claim 1,
Wherein the mesh layer is a ripstop material.

Images