WO2018131786A1

WO2018131786A1 - Reinforced composite film and manufacturing method therefor

Info

Publication number: WO2018131786A1
Application number: PCT/KR2017/013164
Authority: WO
Inventors: 정영화; 장봉준; 정광필
Original assignee: 주식회사 아로텍
Priority date: 2017-01-13
Filing date: 2017-11-20
Publication date: 2018-07-19
Also published as: KR101738837B1; CN108603947A

Abstract

The present invention relates to: a reinforced composite film, which can be manufactured at low cost and has very remarkable durability and physical properties such as restorability, flexibility, lightweightness, water resistance, and heat resistance, is prevented from being easily torn or damaged even if an external force is applied thereto, and can be semi-permanently used even if repeatedly bent; and a manufacturing method therefor. According to the present invention, the reinforced composite film comprises: a first flexible layer and a second flexible layer which have flexibility; a mesh layer located between the first flexible layer and the second flexible layer; and main binding layers for binding the first flexible layer, the mesh layer and the second flexible layer, wherein the first flexible layer and the second flexible layer have joint parts that are positioned to face each other and are penetratively formed in a predetermined shape such that the mesh layer can be exposed to the outside. In addition, according to the present invention, a method for preparing the reinforced composite film comprises: a preparation step of positioning a pair of main binding layers between a pair of flexible layers having flexibility, forming penetrated joint parts in a predetermined shape on the flexible layers and the main binding layers, and positioning a mesh layer between a pair of the main binding layers; and a main binding step of binding a pair of the flexible layers and the mesh layer by melting a pair of the main binding layers.

Description

Composite Reinforcement Film and Manufacturing Method

The present invention relates to a composite reinforcement film and a manufacturing method, and more particularly, can be manufactured at a low cost, and have excellent physical properties such as durability and resilience, flexibility, light weight, water resistance, heat resistance, and tear easily even when external force is applied. The present invention relates to a composite reinforcement film and a manufacturing method that can be used semi-permanently even if not repeatedly lost or broken.

Hereinafter, the present invention will be described using the toy for convenience of description, but the present invention can be applied to various fields that are not limited to the toy.

Various kinds of toys are sold on the market for young children to play with. Such toys are very diverse in material, size, shape, etc., depending on the type, and recently, many toys made of paper materials have been released for children to play with safely.

Toys made of paper are very light and not easily damaged by shocks, etc., and are not hard or sharp, which is very safe for children to play with.

However, due to the nature of the paper is vulnerable to water, if the bending and unfolding operation is repeated, there is a problem that does not maintain the shape is wrinkled or torn.

In particular, when the paper material is applied to a component that plays a role of a joint repeatedly bent among the toy parts, there is a limit to the application because the problem of being separated or torn into several layers along the grain direction does not last long.

Accordingly, the present applicant can manufacture at low cost, and has excellent properties such as durability and resilience, flexibility, light weight, water resistance, heat resistance, and the like, even if an external force is applied, it is not easily torn or broken, and even if repeatedly bent We have developed a composite reinforcement film and a manufacturing method that can be used semi-permanently.

Embodiments of the present invention can be manufactured at low cost, and have excellent physical properties such as durability and resilience, flexibility, light weight, water resistance, and heat resistance, and are not easily torn or broken even when external force is applied, as well as repeatedly bending Even if the purpose is to provide a composite reinforcement film and manufacturing method that can be used semi-permanently.

The composite reinforcement film according to the present invention for achieving the above object is a flexible flexible first layer and the second flexible layer, the mesh layer and the first flexible layer positioned between the first flexible layer and the second flexible layer. And a main binding layer for binding the layer, the mesh layer, and the second flexible layer, wherein the first flexible layer and the second flexible layer have a joint part formed in a predetermined shape so that the mesh layer is exposed to the outside. Characterized by facing.

In addition, the method of manufacturing a composite reinforcement film according to the present invention is to place a pair of main binding layer between a pair of flexible layers having flexibility to form a joint portion penetrated in a predetermined shape in the flexible layer and the main binding layer, A preparatory step of placing a mesh layer between a pair of main binding layers and a main binding step of melting the pair of main binding layers to bind the pair of flexible layers and the mesh layer.

The present invention has various effects as follows.

First, the composite reinforcing 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 reinforcement 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 reinforcing film according to the present invention is excellent in durability, resilience and flexibility is not easily broken even when the impact is applied, even if the flexible layer is bent by the external force is restored to the initial appearance in a short time.

Fourth, the composite reinforcement film according to the present invention ensures the bending angle close to about -180 ° ~ +180 ° by allowing the flexible layer is not deformed and the mesh layer itself is bent.

Fifth, the composite reinforcing film according to the present invention can be used semi-permanently by applying a mesh layer of the fabric material so as not to be torn or broken even if repeatedly bent.

Sixth, the manufacturing method of the composite reinforcement film according to the present invention is very simple by taking a folding method after forming a joint portion of a shape symmetrical with respect to the virtual center line.

Seventh, the composite reinforcing film manufacturing method according to the present invention significantly reduces the manufacturing process and manufacturing cost by first forming a joint before binding the mesh layer and the flexible layer.

1 is a view showing a laminated structure of a composite reinforcement film according to the present invention.

Figure 2 is a real product picture showing the laminated structure of the composite reinforcement film according to the present invention.

3 is a view illustrating a joint part symmetrical with respect to a virtual center line in the flexible layer of the composite reinforcement film according to the present invention.

4 is a view showing a state in which a mesh layer is placed on the flexible layer of the composite reinforcement film according to the present invention.

5 is a view showing a joint portion of the composite reinforcement 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 in the joint portion.

7 is a flow chart of the composite reinforcing film manufacturing method according to the present invention.

Hereinafter, with reference to the accompanying drawings will be described an embodiment of the present invention, the reference numerals of the background art and already described configuration is equally applied unless otherwise noted.

In addition, the description of the composite reinforcement film and the manufacturing method of the present invention as a preferred embodiment, not limited to the embodiment can be implemented in various forms, the shape and size for each configuration is to represent a representative embodiment It is not fixed, but can be variously modified if the same / similar effects can be realized.

1 to 4, the composite reinforcement film 1 according to an embodiment of the present invention is the first flexible layer 200, the second flexible layer 500, the mesh layer 400 and the main binding Layer 300.

The first flexible layer 200 and the second flexible layer 500 are configured to form the overall appearance of the composite reinforcement film 1 by forming a top plate and a bottom plate on the basis of the mesh layer 400 to be described later. It is flexible so that it can be bent and restored without breaking or breaking.

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

In addition, in the present embodiment, the first flexible material is used by using the surface layer 210, the reinforcement layer 230, and the sub-binding layer 220 to facilitate surface printing and to secure physical properties such as stiffness, hardness, strength, and durability. Although the layer 200 and the second flexible layer 500 are formed, it is also possible to form a single layer rather than a multilayer.

The surface layer 210 is a layer of a synthetic resin material positioned on the outermost side of the composite reinforcement film 1, and may print letters, pictures, figures, colors, etc. of various shapes on the surface as necessary.

The thickness of the surface layer 210 affects the printing state and processability, but if the thickness exceeds 30㎛ or less than 20㎛, since the printing is not normally performed and workability is reduced, the thickness of the surface layer 210 is 20㎛ ~ 30 It is preferably formed to a thickness of 탆.

The reinforcement layer 230 is a layer for reinforcing the physical properties of the surface layer 210, and is bound to the bottom surface of the surface layer 210 by the sub-binding layer 220.

That is, when the surface layer 210 made of synthetic resin is formed to have a thickness of 20 μm to 30 μm, printing and workability are excellent, but physical properties such as stiffness, hardness, strength, and durability are inferior, and the first and second flexible layers 200 and 500 ) When it is too soft to lift itself, it does not maintain a flat shape and easily bends, thereby compensating for the insufficient property by using the reinforcing layer 230.

The surface layer 210 and the reinforcement layer 230 described above may be formed of different materials, but in this embodiment, the CPET material is applied in the same manner as the polyethylene terephthlate (PET) material in order to obtain excellent physical properties.

In case of CPET material, it is resistant to heat deformation due to its high heat resistance, and it is very inexpensive as the price is 1/7 compared with thermosetting resin. Of course, it is also possible to apply APET material instead of CPET material, but APET material is weaker in heat deformation than CPET material, it is preferable to apply CPET material.

The thickness of the reinforcing layer 230 affects the physical properties of the composite reinforcing film 1, but if it is less than 240㎛ is easily bent due to lack of strength, if it exceeds 260㎛ the physical properties compared to the overall thickness and weight increase greatly It does not improve. Therefore, the reinforcing layer 230 is preferably formed to a thickness of 240㎛ ~ 260㎛ to ensure optimal physical properties.

The sub-binding layer 220 is configured to bind the surface layer 210 and the reinforcing layer 230. When the sub-binding layer 220 is formed to have a thickness of less than 5 μm, the binding force decreases. When the sub-binding layer exceeds 10 μm, the binding force no longer increases. Since the thickness of the first and second

flexible layers

200 and 500 itself becomes too thick and heavy, it is preferable to form a thickness of 5 μm to 10 μm.

In the present embodiment, although the hot melt (EVA; Ethylene-Vinyl Acetate) is applied to the sub tie layer 220 and the main tie layer 300, various kinds of adhesive members and adhesive methods may be applied if they can perform the same function.

As such, the first and second

flexible layers

200 and 500 may be formed of one layer or several layers, and the joint part 240 formed through the first flexible layer 200 and the second flexible layer 500 in a predetermined shape. Is formed.

The joint part 240 is configured to expose the mesh layer 400 positioned between the first flexible layer 200 and the second flexible layer 500 to the outside, and the first joint part formed on the first flexible layer 200. The second joint part 242 formed on the 241 and the second flexible layer 500 are positioned to face each other.

As shown in FIGS. 5 and 6, the joint part 240 becomes a folding part when a force is applied to the composite reinforcement film 1, and the first and second flexible layers are formed through the joint part 240. (200,500) is not bent or folded directly, only the mesh layer 400 is folded.

The joint part 240 formed on the first and second

flexible layers

200 and 500 penetrates through the printing layer 100, the surface layer 210, the sub-binding layer 220, and the reinforcing layer 230 to form a mesh layer 400. ) Is exposed to the outside, the first flexible layer 200 is partitioned from the first joint part 241 and the second flexible layer 500 is partitioned from the second joint part 242. .

That is, when forming a plurality of joints 240 as shown in Figure 5 it is possible to form a variety of areas and directions that can be bent in the same plane.

The mesh layer 400 is configured to bond with the first flexible layer 200 and the second flexible layer 500 to have excellent durability, and is positioned between the first flexible layer 200 and the second flexible layer 500. do.

The mesh layer 400 not only prevents the first and second

flexible layers

200 and 500 of the synthetic resin from being torn, but is also exposed to the outside by the above-described joint part 240 to function as a kind of hinge and joint. .

That is, when the first and second

flexible layers

200 and 500 of the synthetic resin material are repeatedly bent, the shape is not restored due to deformation, and when the first and second

flexible layers

200 and 500 are themselves bent, the durability is very weak such as torn or the layers are separated. The mesh layer 400 is bent instead of the two

flexible layers

200 and 500.

Mesh layer 400 may be applied to a variety of materials, such as synthetic resin, metal, fabric, but in the present embodiment was applied as a fabric material to ensure excellent durability for bending.

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

In addition, when the

flexible layer

200, 500 itself is bent, the upper surface is stretched and the lower surface is compressed so that the bending is not naturally performed and the bending angle is also narrowed. When the mesh layer of the fabric material itself is bent as in the present invention, A bending angle close to about -180 ° to + 180 ° can be secured.

In the case of general fabrics, the grain direction is present, so that shear stress and torsion stress are easily torn along the grain direction. Therefore, in the present embodiment, a mesh layer 400 made of a ripstop material is applied to solve this disadvantage, and the ripstop does not have a grain direction and thus does not tear easily regardless of the direction in which external force is applied. It can be secured.

The main binding layer 300 is configured to bind the first flexible layer 200 and the mesh layer 400, the second flexible layer 500 and the mesh layer 400 to be formed of one layer or two or more layers. In addition, the hot melt (EVA) of the present embodiment can be applied in various ways, such as adhesive film, liquid adhesive.

The main binding layer 300 may be formed of one main binding layer 300 such that the entire mesh layer 400 is accommodated in the main binding layer 300, and the first main binding layer 310 may be formed of a single main binding layer 310. The second main binding layer 320, that is, two layers may be formed to bind both sides of the mesh layer 400, respectively.

In addition, when the first main binding layer 310 and the second main binding layer 320 are melted and bonded by heating, when the mesh (holes formed in the mesh) formed in the mesh layer 400 is large, the first, Since the two main

binding layers

310 and 320 are fused through, they are finally formed as one layer, and when the mesh is small, the two main

binding layers

310 and 320 do not pass and are formed as two layers.

As such, the first main binding layer 310 binds the first flexible layer 200 and the mesh layer 400, and the second main binding layer 320 connects the second flexible layer 500 and the mesh layer 400. In order to bind the composite reinforcement film 1 to have sufficient durability, the bonding force between the mesh layer 400 and the first and second main binding

layers

310 and 320 is very important.

That is, when the bonding force between the mesh layer 400 and the first and second main binding

layers

310 and 320 is weak, the mesh layer 400 and the first and second

flexible layers

200 and 500 may be separated during repeated bending. It is important to secure a high bonding force, and in order 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 mesh layer 400 are obtained. ) Is very important.

When the thickness of the first and second main binding

layers

310 and 320 is less than 70 μm, the adhesive strength is weak and the adhesive force does not increase further from 80 μm or more, so that the thicknesses of the first and second main tie layers 310 and 320 are 70 μm to 80 μm, respectively.

In addition, when the mesh layer 400 exceeds 75 denier, the first and second main binding

layers

310 and 320 are melted through the mesh and are fused to each other to secure a very high bonding force. The two main

binding layers

310 and 320 do not pass through the mesh and are separately bound to both sides of the mesh layer 400.

In this case, if the bonding strength 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 are separately coated by urethane coating on the surface of the mesh layer 400. It is desirable to maximize the bonding force between the (310,320) and the mesh layer 400.

Hereinafter, a method of manufacturing a composite reinforcing film according to the present invention, and the same description as in the above description is replaced.

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

In the preparatory 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 have a predetermined shape. Forming the penetrated joint portion 240, and positioning the mesh layer 400 between the pair of main binding layer 300, the main binding layer 300 is formed between the flexible layer in a separate configuration, such as a film ( It may be inserted into the 200,500, it may be formed on the opposite inner surface of the flexible layer (200,500) by coating as in the present embodiment.

This preparation step (S100) is a printing step (S110), the first sub-binding step (S120), the second sub-binding step (S130), the patterning step (S140), lamination step (S160) and the main binding step (S200) Include.

The printing step S110 is a step of forming the print layer 100 such as a pattern, a picture, a figure, etc. on the surface layer 210, and may form the print layer 100 in various ways.

The first sub-binding step (S120) is a step of binding the surface layer 210 and the reinforcing layer 230 using the sub-binding layer 220 to make the

flexible layers

200 and 500, and the reinforcing layer 230 (240 μm to 260 μm). Silver is formed thicker than the surface layer 210 (20㎛ ~ 30㎛) to enhance the physical properties of the surface layer 210 formed relatively thin.

The surface layer 210 and the reinforcement layer 230 of the synthetic resin material (CPET) having flexibility is bound by the sub-bonding layer 220 of the EVA material (hot melt) and uses a dry laminating method.

That is, the film-type EVA sub-bonding layer 220 is positioned between the surface layer 210 and the reinforcing layer 230, and then heated and pressurized to a temperature of about 40 ° C. to 50 ° C. to bind, and the temperature exceeds 50 ° C. In this case, since the thickness of the surface layer 210 is very thin, such as 20㎛ ~ 30㎛ may be thermally deformed it is preferable not to exceed 50 ℃.

The second sub-binding step (S130) is a step of forming the main binding layer 300 of the EVA material (hot melt) on the reinforcing layer 230 in which the first sub-binding step (S120) is completed, and the mesh layer 400 and the reinforcing layer ( The main binding layer 300 is first formed on the surface of the reinforcing layer 230 instead of simultaneously binding the 230.

This is for carrying out the patterning step (S140) to be described later, if the patterning step (S140) is performed in a state in which the reinforcing layer 230 and the mesh layer 400 is bound, the joint part 240 also penetrates the mesh layer 400. It is preferable to carry out stepwise because it is formed.

The second sub-binding step (S130) is a main binding layer 300 having a thickness of 70㎛ ~ 80㎛ on the surface of the reinforcing layer 230 by applying heat to the raw material of the EVA material (hot melt) at a temperature of 70 ℃ ~ 80 ℃ ). At this time, since the surface layer 210 and the reinforcing layer 230 are bound through the first sub-binding step (S120), even if heat is applied at a temperature of 70 ° C. to 80 ° C., the thermal deformation does not occur. This can happen.

The stacking step (S160) is a step of forming a mesh layer 400 of a fabric material between the pair of flexible layers (200, 500) so that each of the reinforcing layers 230 to face each other. The stacking step S160 may overlap the first flexible layer 200 and the second flexible layer 500 provided separately, and insert the mesh layer 400 therebetween, but in this case, the first and second flexible layers may be inserted. It is very difficult to accurately match the edge of the layer (200, 500) and the joint portion 240, there is a disadvantage that the price of the product increases because the manufacturing process and manufacturing equipment increases.

Therefore, in the present embodiment, in order to solve this disadvantage, a pair of

flexible layers

200 and 500 facing each other by folding one first flexible layer 200 on which the main binding layer 300 is formed based on a virtual center line L. ), The surface layer 210, the sub-binding layer 220, the reinforcing layer 230 and the main binding layer 300 are all formed in a pair.

The mesh layer 400 inserted between the pair of

flexible layers

200 and 500 is applied to the mesh layer 400 of a ripstop material, and in the case of the ripstop, there is no grain direction and thus easily tears regardless of the direction in which an external force is applied. Since it is not supported, it can secure very excellent durability.

The patterning step S140 is a step of forming the joint part 240 penetrated in a predetermined shape in the

flexible layers

200 and 500 and the main binding layer 300. In the patterning step S140, the first joint part 241 and the second joint part 242 having the same shape may be formed in the first flexible layer 200 and the second flexible layer 500, respectively. In this case, however, it is very difficult to stack the first joint part 241 and the second joint part 242 accurately in the stacking step S160.

Therefore, in the present exemplary embodiment, the first joint part 241 and the second joint part are symmetrical to each other on the basis of the virtual center line L in the first flexible layer 200 in which the main binding layer 300 is formed. 242 is formed through the first joint part 241 and the second joint part 242 when the first flexible layer 200 is folded in half based on the virtual center line L at the lamination step S160. Exactly overlaps.

The main binding step (S200) is a step of binding a pair of flexible layers (200,500) by melting the main binding layer (300) by using a laminating method after the lamination step (S160) is completed. In order to melt the main binding layer 300 of the EVA material because it is heated and pressurized, it is preferable to heat to a temperature of 110 ℃ ~ 140 ℃.

At this time, since the pair of

flexible layers

200 and 500 are stacked on each other, the surface layer 210 or the reinforcing layer 230 does not thermally deform even when heated to a temperature of 110 ° C. to 140 ° C., and the flexible layer exceeds 140 ° C. It can itself be thermally deformed.

During the 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 with the mesh layer 400, and the mesh layer 400 The first main binding layer 310 and the second main binding layer 320 may be fused to each other by passing through the mesh layer 400 according to the mesh size of the wire), or may be formed in separate configurations on both sides of the mesh layer 400. Can be bound.

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

This mesh coating step (S150) is to increase the binding force between the main binding layer 300 and the mesh layer 400 during the main binding step (S200), as described above when the mesh layer 400 exceeds 75 denier Although the first main binding layer 310 and the second main binding layer 320 are fused to each other through the mesh layer 400, the bonding force becomes very strong. Bound to the surface of 400.

Therefore, when the mesh layer 400 is 75 denier or less, it is preferable to coat urethane on the surface of the mesh layer 400 to maximize the bonding force between the main binding layer 300 of the synthetic resin material and the mesh layer 400 of the fabric material. desirable.

In this embodiment, the mesh coating step (S150) was performed by putting the mesh layer 400 in a solvent in which urethane was dissolved, but various methods may be applied if the same effect could be realized.

Bending in the above description means not only bending but also comprehensive meaning such as bending, folding and bending.

The composite reinforcement film according to the present invention includes a flexible first flexible layer and a second flexible layer, a mesh layer positioned between the first flexible layer and the second flexible layer, and the first flexible layer and a mesh layer, and And a main binding layer for binding the two flexible layers, wherein the first flexible layer and the second flexible layer are positioned to face each other so that the joint parts formed in a predetermined shape face each other so that the mesh layer can be exposed to the outside. It is done.

Therefore, the composite reinforcing film according to the present invention is excellent in water resistance and heat resistance, and can be applied to various environments and products, and is light and easy to carry and move even when applied to a bulky product.

In addition, it is excellent in durability, resilience and flexibility, and is not easily broken even when an impact is applied, and even if the flexible layer is bent by an external force, it is restored to its initial state in a short time, and even if repeatedly bent by applying a mesh layer of fabric material Semi-permanent use is possible by preventing damage.

In the method of manufacturing a composite reinforcing film according to the present invention, the manufacturing process is very simple by forming a joint part having a symmetrical shape based on a virtual center line, and then folding it, and forming the joint part before binding the mesh layer and the flexible layer. This drastically reduces the manufacturing process and manufacturing costs.

Claims

A first flexible layer and a second flexible layer having flexibility;

A mesh layer positioned between the first flexible layer and the second flexible layer; And

A main binding layer for binding the first flexible layer, the mesh layer, and the second flexible layer;

Composite reinforcement film, characterized in that in the first flexible layer and the second flexible layer, the joint portion formed in a predetermined shape so as to be exposed to the outside to face each other.
The method of claim 1,

At least one of the first flexible layer and the second flexible layer,

Surface layer of synthetic resin material,

A reinforcement layer made of synthetic resin material to reinforce the physical properties of the surface layer;

Composite reinforcement film comprising a sub-binding layer for binding the surface layer and the reinforcing layer.
The method of claim 1,

The mesh layer is a composite reinforcement film, characterized in that the material (Ripstop).
The method of claim 3, wherein

The main binding layer,

A first main binding layer for binding the first flexible layer and the mesh layer;

It includes a second main binding layer for binding the second flexible layer and the mesh layer,

The mesh layer,

If less than 75 denier composite reinforced film characterized in that the urethane coating.
The method of claim 2,

The surface layer and the reinforcing layer is a CPET material, the main binding layer and the sub-binding layer is a composite reinforcement film, characterized in that the EVA (Ethylene-vinyl acetate copolymer) material.
A pair of main tie layers is positioned between a pair of flexible layers, and a joint portion penetrated in a predetermined shape is formed between the flexible layer and the main tie layer, and a mesh layer is positioned between the pair of main tie layers. Preparing to make; And

A method of manufacturing a composite reinforcing film comprising a main binding step of melting a pair of main binding layers to bind a pair of flexible layers and the mesh layer.
The method of claim 6,

The preparation step,

A first sub-binding step of binding the surface layer and the reinforcement layer of synthetic resin using a sub-binding layer to form a flexible layer,

A second sub binding step of forming a main binding layer on the reinforcing layer;

Laminating the pair of flexible layers so that the reinforcing layers face each other and placing a mesh layer therebetween,

The reinforcement layer is a composite reinforcement film production method characterized in that the thicker than the surface layer.
The method of claim 7, wherein

Method of manufacturing a composite reinforcement film comprising a printing step of forming a printing layer on the surface layer before the first sub-binding step.
The method of claim 7, wherein

The preparation step includes a patterning step of forming through the joint portion of the shape symmetrical to each other based on the virtual center line on the flexible layer on which the main binding layer is formed,

The laminating step, the composite reinforcement film manufacturing method characterized in that to form a pair of flexible layers by folding the flexible layer on the basis of the virtual center line.
The method of claim 7, wherein

Composite strengthening film manufacturing method comprising a mesh coating step of coating a urethane on the surface of the mesh layer before the laminating step.