KR20130052489A - Corrugated steel pipe with film which is laminated with mesh - Google Patents

Abstract

PURPOSE: A mesh laminated film, a steel plate having the same and a corrugated steel pipe having the same are provided to prevent a film from being naturally separated from the steel plate or the corrugated steel pipe by using a mesh having rigidity and adhesion, thereby improving the original performance of the film coated on the steel plate or the corrugated steel pipe. CONSTITUTION: A mesh laminated film(20), a steel plate having the same and a corrugated steel pipe having the same are provided. A mesh(40) does not damage adhesion between films while improving the rigidity of the steel plate and the corrugated steel pipe. The mesh laminated film includes a lower layer film(50), an upper layer film(30), and the mesh having a net shape. Based on a position where the steel plate or the corrugated steel pipe is coated on the mesh laminated film, the upper layer film is called as an external layer film and the lower layer film is called as an internal layer film.

Description

Corrugated steel pipe with film which is laminated with mesh

The present invention relates to a corrugated steel pipe having a film in which a mesh is laminated, a steel sheet having a film in which a mesh is laminated, and a film in which a mesh is laminated, and more particularly, a coating on the outer circumferential surface and / or the inner circumferential surface of a steel sheet of a corrugated steel pipe. It has a structure in which a mesh in the form of a mesh is laminated on the film to prevent external impact, to secure adhesion (anti-peel), to prevent damage to the film, to improve tensile strength, durability, abrasion resistance, corrosion resistance, and rigidity. It relates to a film and a steel sheet and corrugated steel pipe having the same.

Corrugated steel pipes are widely used as hollow formwork or construction chutes in drainage of sewage and wastewater, agricultural water, salt sea area, offshore construction and construction. Existing concrete pipes have problems such as manpower shortage and cost and environmental damage during construction, and recently, corrugated steel pipes having high external pressure strength and excellent structural safety, durability, economy, and construction properties have been spotlighted.

Figure 1a is a structural diagram of a corrugated steel pipe according to the prior art 1.

As shown in FIG. 1A, the corrugated steel pipe 100 has a shape in which mountains and valleys are formed to be continuously wound in a spiral form in the longitudinal direction, and is galvanized symmetrically on the outer and inner circumferential surfaces of the steel plate 110. 112, adhesive PE films 113 and 114, high strength PE films 115 and 116 are coated.

Prior art 1 is coated with a double film on the galvanized, such as adhesive PE film and high-strength PE film to prevent corrosion and oxidation due to the toxicity of sewage, wastewater, domestic sewage.

However, the adhesive PE film of the prior art 1 and the high-strength PE film itself have a problem in that they are weak in external impact and inferior in tensile force. In other words, galvanized steel sheet is generally used in consideration of corrosion of corrugated steel pipe. To protect the galvanized steel sheet, only the coated PE film and high strength PE film are coated. This easily damaged, there is a problem that the life of the corrugated steel pipe is shortened.

For example, high-strength PE film and adhesiveness with weak physical properties as the corrugated steel pipe is scratched (cut, scratched) by heavy equipment during construction when the corrugated steel pipe is transferred to heavy equipment such as cranes or fork-lanes during installation. Damage from the PE film to the galvanized steel sheet underneath is frequently generated.

On the other hand, after construction, not only waste water but also stones and gravel are transferred to the inner circumferential surface of the corrugated steel pipe. Such stones and gravel are often damaged from the high strength PE film and the adhesive PE film having weak physical properties to the lower galvanized steel sheet. It is happening.

Figure 1b is a structural diagram of a corrugated steel pipe according to the prior art 2.

As shown in Figure 1b, the corrugated steel pipe of the prior art 2 is symmetrically galvanized (211, 212), the adhesive PE film (213, 214) and the intermediate reinforcing material 215, the outer and inner peripheral surface of the steel sheet 210 216 and high strength PE films 217 and 218 are laminated.

That is, in the prior art 2, an intermediate reinforcing material is inserted between the adhesive PE film and the high strength PE film using the nonwoven fabric as the intermediate reinforcing material. The manufacturing equipment of the prior art 2, corrugated steel pipe structure is Korean Patent Publication No. 2004-89931 (name of the invention: "functional high strength adhesive sheet and a system and method for manufacturing the sheet and a functional high strength steel sheet welded sheet") , Republic of Korea Patent Publication No. 2006-106592 (name of the invention: "galvanized steel sheet and galvanized spiral corrugated steel pipe using the same").

The prior art 2 is produced by first hot pressing the high-strength PE film on the nonwoven fabric upper surface in the manufacturing process, and then by hot pressing the adhesive PE film on the nonwoven fabric lower surface.

However, the corrugated steel pipe of the prior art 2 may slightly increase the strength and durability by inserting the nonwoven fabric, but the adhesion between the nonwoven fabric and the high-strength PE film is inferior due to the nature of the nonwoven fabric, and the adhesion between the nonwoven fabric and the adhesive PE film is inferior. That is, since the nonwoven fabric is not directly bonded between the high-strength PE film and the adhesive PE film, there is a problem in that the PE film is peeled off before and after construction.

In addition, the corrugated steel pipe of the prior art 2 is a non-woven fabric of high-strength PE film shock-absorbing action against the external impact caused by the heavy impact on the high-strength PE film on the outer peripheral surface and the stone and gravel mixed in the drainage flow rate into the high-strength PE film on the inner peripheral surface. There is a problem that the life of the corrugated steel pipe is shortened because it can not be properly.

In addition, the prior art 2 has a problem that the unit price of the corrugated steel pipe is increased due to the use of expensive non-woven fabric, and in particular, the manufacturing cost of producing a film with a high-strength PE film and a non-woven fabric and adhesive PE film structure significantly increases.

That is, the existing manufacturing equipment for producing a film by heat-compressing a high-strength PE film and an adhesive PE film cannot produce the film of the prior art 2, and thus additional equipment expansion is required.

Specifically, the number of processes is increased and mass-produced because it is necessary to have a double facility such as a facility for heating and pressing a high-strength PE film on the upper surface of the nonwoven fabric and a device for heating and pressing an adhesive PE film on the lower surface of the nonwoven fabric to which the high-strength PE film is bonded. There is a problem that this remarkably falls.

Therefore, it is a low-cost new product that guarantees film adhesion (prevention of peeling) while having external impact mitigation, durability, abrasion resistance, tensile strength, corrosion resistance, and rigidity, which can prevent the galvanized steel sheet of corrugated steel pipe from being damaged before and after construction in the field. Development of films is urgently required.

In addition, there is an urgent need for the development of a new film manufacturing facility capable of mass-producing a film at a low manufacturing cost without enormous capacity expansion of existing manufacturing facilities and an increase in the number of processes.

Accordingly, the present invention has been proposed to solve the above problems and to meet the above requirements, to have a structure in which a mesh of a mesh form is laminated on a film coated on the outer circumferential surface and / and the inner circumferential surface of the corrugated steel pipe In order to provide a mesh laminated film, steel sheets and corrugated steel pipes having the same, which improves external impact mitigation, guarantees adhesion (anti-peel), prevents film damage, tensile strength, durability, wear resistance, corrosion resistance, and rigidity. have.

The objects of the present invention are not limited to the above-mentioned objects, and other objects and advantages of the present invention which are not mentioned can be understood by the following description, and will be more clearly understood by the embodiments of the present invention. It will also be readily apparent that the objects and advantages of the invention may be realized and attained by means of the instrumentalities and combinations particularly pointed out in the appended claims.

The present invention for achieving the above object is a film laminated with a mesh and a steel sheet and corrugated steel pipe provided with the same, characterized in that the mesh does not impair the adhesion between the film while increasing the rigidity of the steel sheet and corrugated steel pipe To provide a film laminated with a mesh and a steel sheet and corrugated steel pipe having the same.

The present invention as described above can further improve the performance of the film is coated on the steel plate and / or corrugated steel pipe by preventing the film adhesion is naturally peeled off through the mesh that can ensure the two properties of the rigidity and adhesiveness at the same time. It has an effect.

In addition, the present invention by developing a low-cost mesh laminated film to be used in the steel sheet or / and corrugated steel pipe, when the construction, transportation, and installation of corrugated steel pipe, the external impact buffering effect and durability to the inner and outer peripheral surface of the corrugated steel pipe after construction It has the effect of prolonging the life by preventing the galvanized disc of corrugated steel pipe from being damaged by having wear resistance, tensile strength, corrosion resistance and rigidity.

In addition, the present invention can manufacture the laminated film by simply adding the mesh to the film manufacturing equipment already installed by the simple construction without the existing equipment expansion, modification, the film at a low manufacturing cost without enormous equipment expansion and increasing the number of processes It has the effect of mass production.

Figure 1a is a structural diagram of a corrugated steel pipe according to the prior art 1.
Figure 1b is a structural diagram of a corrugated steel pipe according to the prior art 2.
Figure 2 is a structural diagram of a film laminated in accordance with the present invention.
3 is a structural diagram of a steel sheet formed with a mesh of the present invention.
Figure 4 is a structural diagram of a corrugated steel pipe formed with a mesh of the present invention.
5 is a perspective view of the mesh proposed in the present invention.
Figure 6a is a perspective view of a corrugated steel pipe formed with a mesh of the present invention.
6b is a perspective view of a corrugated steel pipe of the prior art;
7 is a block diagram of an apparatus for manufacturing a film laminated with a mesh according to the present invention.
8 is a flow chart of a method for producing a film laminated with a mesh according to the present invention.

The above objects, features, and advantages will become more apparent from the detailed description given hereinafter with reference to the accompanying drawings, and accordingly, those skilled in the art to which the present invention pertains may share the technical idea of the present invention. It will be easy to implement. In the following description, well-known functions or constructions are not described in detail since they would obscure the invention in unnecessary detail. Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings.

2 is a structural diagram of a film laminated with a mesh according to the present invention, Figure 3 is a structural diagram of a steel sheet formed with a mesh of the present invention, Figure 4 is a structural diagram of a corrugated steel pipe formed with a mesh of the present invention, Figure 5 is a present invention Is a perspective view of the mesh presented.

As shown in FIG. 2, the film 20 in which the mesh is stacked according to the present invention includes a lower layer film 50, an upper layer film 30, and a mesh 40 having a mesh form. Here, the upper layer film 30 may be referred to as an outer layer film, and the lower layer film 50 may also be referred to as an inner layer film, based on the position where the film 20 is formed in the steel sheet or / and the corrugated steel pipe.

2 and 5 will be described first with respect to the mesh 40 of the present invention.

As shown in Figures 2 and 5, the mesh 40 may be manufactured by molding a material having impact resistance, wear resistance, rigidity in the form of a net. The hole 41 of the mesh may be a polygon such as a triangle or a quadrangle.

As the material of the mesh 40, a synthetic resin such as PE such as the upper layer film 30 and the lower layer film 50 may be used. As another example, fibers such as nylon may be used. Preferably, when the mesh 40 is manufactured in the form of a mesh of square holes using a PE material, the adhesion between the mesh 40 and the upper layer film 30 may be further increased.

In one example, the mesh 40 may be composed of a synthetic resin of HDPE (high density polyethylene) and LDPE (low density polyethylene) and MB (Master Batch) having a thickness of 0.2 mm.

In the present invention, on the flat film composed of the lower layer film 50 (e.g., adhesive PE film) and the upper layer film 30 (e.g., high strength PE film, etc.) The mesh 40 is bonded to present a new film coated on the inner circumferential surface and / or the outer circumferential surface of the steel sheet or / and the corrugated steel pipe.

In manufacturing the novel film of the present invention, when the high-strength PE film and the adhesive PE film are adhered to each other using a well-known film hot pressing process as it is, the cured state is placed on the high-strength PE film placed on the uncured adhesive PE film. Heat-compression bonding in the state that the mesh-like mesh 40 of the PE material of the position is placed to produce a new film laminated mesh. Here, it will be understood that the mesh-type mesh 40 has a hardened state because it is prefabricated in the form of a fabric.

That is, heat-compression is carried out in a state where the mesh 40 is positioned on the uncured high-strength PE film, and the mesh 40 is bonded to the upper surface of the high-strength PE film by lamination, whereby the high-strength PE film is heated by compression. The portion having the adhesive component of the upper surface is bonded in a form in which a portion thereof penetrates into the hole 41 of the mesh 40. Of course, the part with the adhesive component of the adhesive PE film upper surface and the part with the adhesive component of the high strength PE film lower surface are adhere | attached by heat pressing. This can be confirmed through FIG. 2.

The film lamination structure shown in the lower part of FIG. 2 is obtained by heating and compressing and bonding a mesh 40 having a thickness of 0.2 mm, an upper layer film 30 having a thickness of 0.2 mm, and a lower layer film 50 having a thickness of 0.05 mm. It is showing.

That is, a portion of the adhesive component having a thickness of 0.05 mm (0.05 mm) formed on the upper surface of the upper layer film 30 by heat pressing is infiltrated into the hole 41 of the mesh 40 by a portion of the adhesive component of 0.02 mm. In addition to adhering to the inner wall and the cavity of the 41, the adhesive component of the upper surface of the upper layer film 30 is bonded to the lower surface corresponding to the portion other than the hole of the mesh 40.

As a result, it can be seen that the novel film structure proposed in the present invention has a structure in which a part of the lower surface of the mesh 40 is recessed and laminated on the upper surface of the upper layer film 30.

The material and thickness of the film and the mesh mentioned in the present invention are merely examples based on the corrugated steel pipe standard, and it is preferable to change the material and the thickness according to the season, temperature, and use conditions.

Referring to the structure of the film laminated in the present invention is different from the prior art as follows.

It is possible to think of a three-layer film by further laminating a separate film on the adhesive PE film and the high-strength PE film of the two-layer structure of the prior art 1. However, the three-layered film has a problem that the additional film becomes thicker, and thus the adhesive force is degraded over time according to the environment and place conditions, thereby naturally peeling off from the inner and outer circumferential surfaces of the steel sheet or / and the corrugated steel pipe.

In the case where the three-layer film is coated on the inner and outer circumferential surfaces of the steel sheet or / and the corrugated steel pipe, the film does not have a tensile force because it is unconditionally tough, and thus the buffer cannot act against external impact.

In contrast, the present invention has a structure in which the mesh upper surface protrudes on the outer surface of the inner and outer circumferential surfaces of the steel sheet or / and the corrugated steel pipe by laminating the mesh on a high-strength PE film, so that the mesh has shrinkage force according to the shape action of the mesh. Even with a thickness of 0.2 mm, the external shock buffer can function properly. Of course, the raw material costs can be greatly reduced because only a hole is formed in the PE material.

On the other hand, as in the prior art 2, a structure in which a mesh is laminated like a nonwoven fabric between the adhesive PE film and the high-strength PE film may be considered. However, since the mesh has a hole shape, when the mesh is laminated between the adhesive PE film and the high-strength PE film, air cannot be properly bonded between the adhesive PE film and the high-strength PE film and the mesh due to air caused by the mesh holes. There is a problem of peeling back and forth.

And, as described with respect to the manufacturing process and equipment of the prior art 2, in order to adhere the high-strength PE film to the upper surface of the mesh, and to bond the adhesive PE film to the lower surface of the mesh to which the high-strength PE film is bonded Has many problems, including the inability to produce. The manufacturing process and equipment of the present invention will be described later in detail.

As described above, in developing the reinforcement material for the adhesive PE film and the high-strength PE film, it is recognized that the two characteristics of stiffness and adhesion at the same time are physical contradictions. Has developed a laminated film.

Steel sheet 60 formed with the mesh of the present invention has a structure in which the film 20 of FIG. 2 is laminated on the upper surface and / and lower surface.

For example, as shown in FIG. 3, a first zinc plated 62, a first inner layer film 63, a first outer layer film 64, and a first mesh in the form of a mesh are formed on an upper surface of the disc 61. 65 is laminated, and a second zinc plating 66, a second inner layer film 67, a second outer layer film 68 and a second mesh 69 in the form of a mesh on the lower surface of the disc 61. Has a laminated structure.

3 is for showing the position where the film and the mesh is laminated on the steel sheet, it is preferable to have a structure as described with reference to FIG.

The first mesh 65 and the second mesh 69 are the same as the mesh 40 of FIG. 2, and the first zinc plating 62 and the second zinc plating 66 are the same, and the first inner layer film ( 63 and the second inner layer film 67 are the same, and the first outer layer film 64 and the second outer layer film 68 are the same.

Zinc platings 62 and 66 are formed on the upper surface and / or the lower surface of the disk 61 to prevent corrosion of the disk 61 and the like. For example, zinc may be plated on the upper surface and / or the lower surface of the disc 61 with a plating thickness of 0.0417 mm.

The inner layer films 63 and 67 may be composed of an adhesive PE film, for example, an ADPOLY / functional PE resin having a thickness of 0.05 mm.

The outer layer films 65 and 69 may be made of a high strength PE film, and may be made of, for example, a synthetic resin of HDPE (high density polyethylene) and MB (Master Batch) having a thickness of 0.2 mm.

As shown in FIG. 4, the corrugated steel pipe 70 having the mesh of the present invention has a structure in which the steel sheet of FIG. 3 is continuously wound in a spiral form having peaks and valleys in the longitudinal direction, and is a known corrugated steel pipe manufacturing process. Can be produced. The description relating to the corrugated steel pipe manufacturing process will be omitted since it may obscure the subject matter of the present invention.

Figure 6a is a perspective view of a corrugated steel pipe formed with a mesh of the present invention, Figure 6b is a perspective view of a corrugated steel pipe of the prior art.

6a is an appearance of a corrugated steel pipe manufactured by coating a film 20 composed of a mesh 40, an outer layer film 65, and an inner layer film 63 of the present invention on a galvanized disc 61. Is showing. On the other hand, Figure 6a shows the appearance of the outer circumferential surface side of the corrugated steel pipe, it is not shown in the figure, but the inner side of the corrugated steel pipe is also formed with a film laminated in the same mesh as the outer circumferential surface.

Figure 6b shows the appearance of the prior art corrugated steel pipe manufactured by coating only the adhesive PE film and high-strength PE film on the galvanized disc.

As shown in FIG. 6A, the corrugated steel pipe of the present invention is provided with a mesh, so that when the corrugated steel pipe is manufactured, transported, and installed, external impact buffering, durability, abrasion resistance, tensile strength, corrosion resistance, and rigidity are applied to the inner and outer circumferential surfaces of the corrugated steel pipe even after construction. The film adhesion can be ensured while the galvanized disc of corrugated steel pipe is prevented from being damaged and the life can be extended.

7 is a block diagram of an apparatus for manufacturing a film laminated with a mesh according to the present invention, Figure 8 is a flow chart of a method for producing a film laminated with a mesh according to the present invention.

The apparatus of the present invention comprises a power unit 81, a first film raw material blending / supply unit 82, a second film raw material blending / supply unit 83, a first extruded unit 84, a second extruded unit 85, a phase / Bottom separating part 86, film forming part 87, mesh supply part 88, mesh smoothing part 89, mesh tensioning part 90, hot pressing part 91, film flatness adjusting part 92, The film flatness correction part 93, the film tension part 94, and the film winding part 95 are included.

The power unit 81 may be configured of a power supply, a drive, a control device such as a motor, a speed reducer, and the like.

The first film raw material blending / supply unit 82 mixes and feeds an upper layer film raw material (eg, high strength PE film raw material) fed from the outside to the first extrusion unit 84, and the second film raw material blending / supply unit 83. Is blended with the lower layer film raw material (eg, adhesive PE film raw material) is supplied from the outside and supplied to the second extruded portion (85). The first film raw material blending / supply unit 82 and the second film raw material blending / supply unit 83 may be configured as respective hoppers.

The first extrusion unit 84 mixes and heats the upper layer film raw material and extrudes it into the upper / lowercase separation unit 86, and the second extrusion unit 85 mixes and heats the lower layer film raw material and separates the upper / lowercase separation unit ( 86). In this case, each of the first extrusion part 84 and the second extrusion part 85 may electrically heat each of the upper layer film raw material and the lower layer film raw material to a temperature of 150 to 235 ° C.

The upper and lower separating portions 86 separate the upper layer film and the lower layer film coming from the first extrusion part 84 and the second extrusion part 85, and discharge them to the film forming part 87. The upper and lower separators 86 may be constituted by PE blocks, and may operate at an electric heating temperature of 210 to 230 ° C.

The film forming unit 87 forms a film while adjusting the thicknesses of the upper layer film and the lower layer film received from the upper / lower area separating unit 86, and discharges and transports the film to the heat-compression bonding unit 91. As the film of the film forming part 87 is discharged, the upper layer film of the uncured state is put into the heat pressing part 91 in the form of being placed on the lower layer film. The film molding part 87 may be configured with a die molder, and may operate at an electric heating temperature of 225 to 235 ° C.

On the other hand, the mesh supply unit 88 is a mesh in the form of a mesh [eg; The mesh fabric with square holes made of synthetic resin of HDPE (high density polyethylene), LDPE (low density polyethylene) and MB (Master Batch) is supplied to the mesh smoothing unit 89 while being wound. The mesh supply unit 88 may be constituted by REEL or the like.

The mesh smoothing part 89 smoothes the surface of the mesh coming from the mesh supply part 88 and transfers it to the mesh tension part 90. The mesh smoothing portion 89 may be composed of a plurality of guides.

The mesh tension unit 90 catches the tension of the mesh coming from the mesh smoothing unit 89 and transfers it to the heat crimp unit 91.

As described above, the film conveyed from the film forming part 87, that is, the film of the upper layer film is placed on the lower layer film, and the mesh conveyed from the mesh tensioning unit 90 is introduced into the heating crimping unit 91 when the upper layer The heat pressing process is performed while the mesh is placed on the film.

That is, the heat press part 91 heat-presses and bonds the mesh, the upper layer film, and the lower layer film to transfer to the film flatness adjusting part 92. The hot pressing portion 91 may be composed of at least two symmetrical rollers (ROLLER), can be operated at an electric heating temperature of 45 ~ 70 ℃, the film bonded in a rolling operation (ie mesh Thickness of the laminated film) can also be made.

The operating temperature of the hot pressing portion 91 is preferably a relatively low temperature, preferably 45 to 70 ° C. lower than 225 to 235 ° C. of the film forming part 87. Although it will be described later, this is for the upper layer film and the lower layer film discharged from the film forming unit 87 to be cured and bonded to the mesh and the upper layer film and the lower layer film in the heat-compression unit 91 in the uncured state at a high temperature. In addition, it is to prevent the mesh of the hardened state from being damaged by lowering the relatively heating temperature of the heat press part 91.

In particular, the main process principle of the present invention is described as follows.

The upper layer film of the high-strength PE material is put on the heat-compression part 91 on the lower layer film of the adhesive PE material, and the mesh is placed on the upper layer film on the heat-compression part 91. At this time, it is possible to confirm that the upper layer film of the high-strength PE material is in an uncured state since the heat compression process is performed.

When the heat press process is performed in the heat press part 91, the mesh is pressed downward by the heat press rolling of the upper press roller to adhere to the upper layer film upper surface, and in particular, the unbonded upper layer film upper surface adhesive component portion At the same time, a portion of the lower layer film is adhered to the hole in the mesh, and the lower layer film is pressed upward by heat pressing rolling of the lower pressing roller to bond the lower layer film upper surface and the upper layer film lower surface.

The film flatness adjusting unit 92 adjusts the flatness of the film (that is, the film in which the mesh is laminated) coming from the hot pressing unit 91 and transfers it to the film flatness correction unit 93. The film flatness adjusting unit 92 may be composed of a polishing roller, and may operate at an electric heating temperature of 35 to 50 ° C.

The film flatness correction unit 93 corrects the flatness of the laminated film of the mesh coming from the film flatness adjustment unit 92 and transfers the film to the film tension unit 94. The film flatness correction unit 93 may be composed of a plurality of guides and levelers.

The film tension unit 94 catches the tension of the laminated film of the mesh coming from the film flatness correction unit 93 and transfers it to the film winding unit 95.

The film winding part 95 winds up the laminated film of the mesh coming from the film tension part 94.

In the apparatus of the present invention, other equipments except for the mesh supply unit 88, the mesh smoothing unit 89 and the mesh tension unit 90 (which are defined as 'mesh feeding unit' in the present invention) are well-known film manufacturing facilities. It can be confirmed that the same.

That is, in the present invention, it is possible to manufacture the laminated film by simply adding the mesh to the existing heating crimping unit 91, and it is only necessary to add the mesh input equipment by simple construction without expanding or changing existing equipment.

Next, the main manufacturing process of the present invention will be described with reference to FIG.

The upper layer film and the lower layer film are introduced into the heating crimp unit 91 in a state where the upper layer film (eg, high strength PE film) is placed on the lower layer film (eg, adhesive PE film) (801). At this time, the upper layer film and the lower layer film is preferably injected into the heat-compression unit 91 in an uncured state.

Then, with the upper layer film and the lower layer film input, the mesh in the form of a net is introduced into the heating crimp unit 91 to be positioned on the upper layer film (802).

Then, the heat-compression unit 91 heat-compresses, glues, and discharges the mesh-shaped mesh, the upper layer film, and the lower layer film (803). At this time, it is preferable to heat-compress at a temperature at which the upper layer film and the lower layer film can be cured, and the upper compression roller of the heat compression part 91 heat-compresses the mesh to bond with the upper layer film and to lower the lower part of the heat compression part 91. The compression roller heat-presses the lower layer film to adhere the upper layer film.

Through the manufacturing process as described above, as shown in FIG. 2, a part of the lower surface of the mesh 40 is manufactured to look like a film laminated and recessed on the upper surface of the upper layer film 30.

Next, another embodiment of the present invention will be described.

Another embodiment of the present invention provides an embossing structure of a film and an apparatus and method for manufacturing the film. It is preferable that this embossed structure film is also used for coating of the inner peripheral surface and / or outer peripheral surface of the corrugated steel pipe produced using a steel plate or a steel plate.

That is, the upper surface of the film has a concave-convex shape, so as to reduce external impact, ensure adhesion (prevent peeling), prevent film damage, tensile strength, durability, abrasion resistance, corrosion resistance, and rigidity, as in the aforementioned mesh laminated structure film. It is to promote the effect and effect.

As an example of the embossed structure film of the present invention, a high-strength PE film is laminated on an adhesive PE film, and the upper surface of the high-strength PE film, that is, the upper surface corresponding to the inner circumferential surface and / or the outer circumferential surface of the steel sheet or corrugated steel pipe is uneven. It has a shape.

As described above, a double film of an adhesive PE film and a high strength PE film may be coated on a steel sheet or corrugated steel pipe, but as another example, when one PE film is coated on a steel sheet or corrugated steel pipe, the upper surface of the single PE film is uneven It can also be shaped.

The manufacturing process of the embossed structure film is as follows.

Heat or pressure, ultraviolet rays or electron beams may be applied to the upper surface of the PE film, or resins or chemicals may be used to give the concave-convex shape.

Preferably, the upper surface of the PE film may be formed into a concave-convex shape by using a mold machine or a roller mold machine in which an intaglio pattern is formed. That is, in the present invention, by adding only a mold machine or a roller mold machine to a general film production equipment, an embossed structure film can be produced.

As an example of the embossed structure film manufacturing equipment of the present invention, there is no mesh input section (mesh supply section 88, mesh smoothing section 89 and mesh tension section 90) of FIG. 7, and is installed before the heat compression process. Instead of the film forming part 87 constituted by a die molder, a molder or a roller molder having a negative pattern may be provided.

It will be apparent to those skilled in the art that various modifications and variations can be made in the present invention without departing from the spirit or scope of the invention. The present invention is not limited to the drawings.

20 film 30 upper layer film
40: mesh in the form of a mesh 41: mesh hole
50: lower layer film 60: steel sheet
61 disc 62 first galvanized
63: first inner layer film 64: first outer layer film
65: first mesh in the form of a mesh 66: second zinc plating
67 second inner layer film 68 second outer layer film
69: second mesh in the form of a net

Claims (1)

A film laminated with a mesh, a steel plate and a corrugated steel pipe having the same,
The mesh is a film laminated with a mesh and the steel sheet and corrugated steel pipe having the same, characterized in that while increasing the rigidity of the steel sheet and corrugated steel pipe does not impair the adhesion between the film.

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