KR100568661B1 - High Impermeability Tube - Google Patents

Abstract

The present invention discloses a method for producing a high barrier tube.

According to an aspect of the present invention, there is provided a method of manufacturing a high barrier tube, comprising: forming a body by tubing a laminate sheet including a gas barrier layer in a roll; Pressing the aluminum billet to form a primary shoulder; Coating the inner surface of the primary shoulder with a phenolic resin; Comprising a step of forming a surface layer of the polyethylene-based resin integrally the outer surface of the body and the primary shoulder in a state in which the primary shoulder is located at one side opening side of the body.

In the method of manufacturing a high-breaking tube constructed and operated as described above, in forming a tube, an aluminum billet is pressed to form a primary shoulder, and the molded primary shoulder is integrated with a roll-processed body by a laminate sheet to form a tube. Since the present invention provides a useful effect that can fundamentally solve problems such as deterioration in the contents retention and the discoloration of the shoulder due to the contents transition caused by the conventional shoulder portion is molded as a simple injection molding.

Tube, Laminate, High Barrier, Aluminum

Description

High Impermeability Tube Manufacturing Method

1 is a perspective view for explaining a high barrier tube according to the prior art,

2 and 3 are partial cross-sectional views showing various embodiments of laminate sheet layers used in high barrier tubes according to the prior art;

4 is a view showing a tube formed by a high-breaking tube manufacturing method according to an embodiment of the present invention,

5 is a view for explaining a molding process of the shoulder in the high-shielding tube manufacturing method according to an embodiment of the present invention,

6 is a flow chart for explaining a high-breaking tube manufacturing method according to an embodiment of the present invention,

7 is a view showing a tube formed by a high-shielding tube manufacturing method according to another embodiment of the present invention,

8 is a view for explaining a molding process of the shoulder in the high-shielding tube manufacturing method according to another embodiment of the present invention,

9 is a flowchart illustrating a method for manufacturing a high barrier tube according to another embodiment of the present invention.

<Explanation of symbols for the main parts of the drawings>

10: body 20: shoulder

21: primary shoulder 22: corrosion resistant layer

23: adhesive layer 24: surface layer

25: secondary shoulder

The present invention relates to a method of manufacturing a high barrier tube excellent in chemical resistance and gas barrier properties, and more particularly, by forming a gas barrier layer on the shoulder forming the extrusion port of the tube, while increasing the storage performance of the contents through the shoulder. The present invention relates to a method for manufacturing a high barrier tube, which can stably prevent transition to the outside.

In general, the high-shielding tube refers to a tube for packaging of cosmetics, ointments of medicines, contents for fragrance preservation, etc. Looking at the type, it is roughly classified into an aluminum tube and a laminate tube formed of aluminum according to the material.

 The aluminum tube is used for the packaging of medicines or contents requiring chemical resistance, and is generally formed into a cylindrical shape of a predetermined size of aluminum by a shock compression method, and a seal process and a printing process (convex plate offset method). Of which is then formed into a finished tube.

The aluminum tube manufactured as described above is formed of aluminum, except for the cap, to maintain high barrier to gas and moisture. However, the aluminum tube is easily deformed due to the low restoring property of aluminum metal, and is inconvenient to use. In the case of bending, the bending portion is cut or broken, and the contents are leaked to the outside, which adversely affects the contents retention.

In order to overcome this disadvantage, a laminate having high resilience while maintaining high barrier properties has been developed.

The laminate tube is used as a tube for packaging toothpaste, food and ointment, etc., which are various paste-like materials, and is generally manufactured in a sheet state by adhering a substrate with an adhesive resin by extrusion lamination. It cuts into sheet or roll state, makes a finished tube through printing process and seal process for cylindrical molding, and performs sealing function after filling the final contents. will be.

The sheet forming the body in such a laminate tube is a gas barrier layer of aluminum thin film as a gas barrier layer and a plurality of polymers laminated, and a gas barrier layer of EVOH, a copolymer of ethylene vinyl alcohol (Ethylenevinylalcohol). And a plastic gas barrier layer type in which a plurality of polymers are laminated.

1 is a view showing an embodiment of the manufacturing of a high barrier tube using a laminate sheet according to the prior art, Figures 2 and 3 is a partial cross-sectional view showing a laminate tube comprising an aluminum gas barrier layer and a copolymer film gas barrier layer, respectively. .

As shown in this figure, the tube is formed by processing a large sheet into a cylindrical shape and sealing one end, a shoulder joined to the other end of the body, a lead seal for sealing the inlet of the shoulder, It consists of a cap.

The body is formed of a multi-layered sheet, wherein the sheet includes a gas barrier layer made of a thin aluminum sheet or a copolymer film, and an adhesive layer formed by extruding an adhesive resin such as a copolymer on both sides of the gas barrier layer; This adhesive layer consists of a multi-layered structure having a surface layer formed by bonding a transparent film material such as LLDPE (Liner Low Density Poly Ethylene) to each other, and the plate-like sheet having such a multi-layered structure is rolled into a substantially cylindrical shape and joined to one side opening. It is completed by sealing.

The shoulder is shaped as a fallopian tube shape as shown in the figure and the inlet is formed to squeeze the contents filled in the body to the outside. That is, since the shoulder is mostly structured to be bonded to the other opening of the tube to extrude the contents filled in the body, it is injection molded from a resin such as polyethylene. These shoulders are bonded by high frequency or heat welding. In the case of high frequency bonding, when the aluminum layer of the body is heated, the aluminum layer is heated and the sheet and the shoulder are continuously bonded.

The lead seal is provided in the opening of the shoulder to maintain an airtight state after the contents are filled in the body, and is usually joined by a method such as thermocompression bonding. The lid seal is integrally formed with a handle protrusion so that the user can easily separate the lead seal.

The cap is formed by injection and is a member that covers a portion of the opening side of the shoulder as described above, and is coupled to the shoulder by screwing or provided by an elastic fitting structure.

However, the laminate tube having the aluminum gas barrier layer as described above has no problem in blocking properties such as gas and ultraviolet rays because the aluminum gas barrier layer is formed only on the body portion, but the shoulder portion is formed by injection molding a material such as polyethylene or a resin having no gas barrier property. It is a disadvantage that can not block the gas or moisture.

That is, since the shoulder portion is significantly inferior in gas barrier property, the tube is not maintained in a completely airtight state, resulting in the deterioration of the contents as well as the phenomenon that the contents are in contact with the shoulder portion and transferred to the outside, resulting in deterioration of merchandise and There has been a problem of greatly reducing the reliability as a storage container.

On the other hand, not only the laminate tube having the aluminum gas barrier layer described above, but also the tube employing the gas barrier film shown in FIG. 3 also forms a body using a sheet having a multilayer laminated structure, and the shoulder portion is injection molded of a resin having no gas barrier property. This causes the same problem as in the tube having the aluminum gas barrier layer.

The present invention has been made to solve the above problems, and provides a high-breaking tube manufacturing method for forming aluminum with excellent gas barrier property in the form of a shoulder and integrated with the body to ensure a uniform gas barrier property of the entire tube. Its purpose is to.

In addition, another object of the present invention is another object to ensure the diversity of the printing process by producing a tube by injecting the body after printing on the aluminum layer forming a shoulder.

According to an aspect of the present invention, there is provided a method of manufacturing a high barrier tube, comprising: tubing a laminate sheet including a gas barrier layer in a roll form to form a body; Pressing the aluminum billet or strip to form a primary shoulder; Forming a corrosion resistant layer on the inner surface of the primary shoulder with a phenolic resin; It characterized in that it comprises the step of forming a surface layer of the polyethylene-based resin integrally the outer surface of the body and the primary shoulder in a state in which the primary shoulder is located at one side opening side of the body.

As a preferred feature of the present invention, in the previous step of forming a surface layer of the polyethylene-based resin, to form an adhesive layer of an adhesive resin for adhesion reinforcement on the outer surface of the primary shoulder, it is 5 ~ at 150 ℃ ~ 250 ℃ And a heating step of heating for 15 minutes.

Another desirable feature of the present invention, in the step before forming the surface layer, comprising the step of performing a printing on the outer surface of the primary shoulder.

According to another aspect of the present invention, there is provided a method of manufacturing a high barrier tube, comprising: forming a body by tubing a laminate sheet having a gas barrier layer in the form of a roll; Pressing the aluminum billet or strip to form a primary shoulder; Coating the inner surface of the primary shoulder with a phenolic resin to prevent corrosion; Extruding polyethylene-based resin on the outer surface of the primary shoulder to form a secondary shoulder; It characterized in that it comprises a step of integrating the secondary shoulder and the body by high frequency bonding.

As a preferable feature of the present invention, in the step of coating a phenolic resin on the outer surface of the primary shoulder, the adhesive resin for adhesion reinforcement on the outer surface of the primary shoulder and it is 5 ~ at 150 ℃ ~ 250 ℃ And a heating step of heating for 15 minutes.

The features and advantages of the present invention will become more apparent from the following detailed description based on the accompanying drawings. Prior to this, the terms or words used in the present specification and claims are consistent with the technical spirit of the present invention based on the principle that the inventor can appropriately define the concept of the term in order to explain the invention in the best way. It must be interpreted as meaning and concept.

Hereinafter, with reference to the accompanying drawings will be described a preferred embodiment of the high-shielding tube manufacturing method according to the present invention.

4 is a view showing a tube formed by the high-breaking tube manufacturing method according to an embodiment of the present invention, Figure 5 is a view for explaining the molding process of the shoulder. And, Figure 6 is a view for explaining a tube manufacturing method using the shoulder formed in Figure 5, Figure 7 is a flow chart for explaining a high-breaking tube manufacturing method according to an embodiment of the present invention.

As shown therein, the high-shielding tube according to the present invention comprises the steps of forming a body made of a laminate method, processing a primary shoulder made of aluminum, and a corrosion resistant layer made of resin on the inner and outer surfaces of the primary shoulder; It is prepared by the step of forming a surface layer.

The body is formed of a multilayer laminate sheet, the sheet comprising a gas barrier layer made of a thin aluminum sheet or a copolymer film, an adhesive layer formed by applying an adhesive such as a copolymer to both sides of the gas barrier layer, and the adhesive The layer is made of a structure having a surface layer made by adhering a transparent film material such as LLDPE (Liner Low Density Poly Ethylene) to each layer, and is completed by tubing, ie, rolling and sealing one side opening in the form of a roll.

Such a structure of the body may be implemented in the same manner as before, and in the present invention, if the body has a structural feature having gas barrier properties, its shape or material may be variously modified.

As described above, the body formed in the form of a roll is integrally formed with a shoulder having a shape capable of extruding the contents.

The shoulder may be manufactured in various forms depending on the type of the contents stored in the body, but most of the shoulder is molded in the shape of a fallopian tube. Referring to FIG.

First, a billet (b), which is an aluminum sheet or an aluminum mass having a predetermined size, is provided, and the primary shoulder is formed through press molding.

Here, the press working is molded using at least one mold (m), and a conventional deep drawing processing method or the like is used.

Second, to form a corrosion resistant layer to prevent corrosion on the inner surface of the pressed primary shoulder. At this time, the corrosion resistant layer is preferably a phenol-based (Phenol-type) resin is used as a coating method is a method of spraying the phenol-based resin in a liquid phase using a spray injector.

Third, to form an adhesive layer by coating an adhesive resin for adhesion reinforcement on the outer surface of the primary shoulder formed with a corrosion resistant layer as described above. The adhesive layer is an ethylene-based resin is used, and after applying it to the cylinder is heated for 5 to 15 minutes at about 150 ℃ ~ 250 ℃ undergoes a heating process for maintaining the adhesiveness.

Fourth, as described above, the primary shoulder on which the adhesive layer is formed undergoes a process of forming a surface layer on its outer surface to finally complete shaping of the shoulder.

That is, in a state in which the primary shoulder on which the adhesive layer is formed is positioned at one side of the opening of the body, the surface layer is formed by using an injection molding method of the primary solder and the outer surface of the body integrally with polyethylene-based resin, wherein the surface layer May be integrally formed on the entire outer surface of the primary shoulder and a part of the outer surface of one side of the opening to which the primary shoulder is connected, or integrally formed on the outer surface of the entire primary shoulder and the body.

On the other hand, prior to molding the surface layer of the polyethylene-based resin may further comprise the step of performing printing on the outer surface of the primary shoulder. Here, in the case of printing in the step in which the adhesive layer is not formed on the outer surface of the primary shoulder, it is possible to improve the printing process by stabilizing the elasticity of the adhesive layer and the surface layer performed in a later step.

In addition, since the shoulder in the present invention is formed into a container (trumpet tube, cylinder, prismatic column, etc.) by pressing an aluminum billet or strip, it requires a process of sealing the opening of the shoulder using a conventional lead seal. In the present invention, the opening of the shoulder may be selectively formed by the consumer using a chimpin (usually formed integrally with the rear side of the cap).

As described above, once again the main technical features in one embodiment of the high-breaking tube manufacturing method according to the present invention is to manufacture a tube by integrally injection molding the shoulder on one side of the opening of the tubing body in the form of a roll, In this case, the shoulder is formed by pressing an aluminum billet or strip using a mold having a shoulder shape to form a primary shoulder, and forming an inner layer of an inner surface of the molded primary shoulder and an adhesive layer and a surface layer on an outer surface, respectively. To complete. Here, the shoulder and the body are integrated in the process of forming the surface layer.

On the other hand, the tube manufactured by the above process will be able to seal the part by welding after filling the contents through the other opening of the body.

8 is a view showing a tube formed by a high-shielding tube manufacturing method according to another embodiment of the present invention, Figure 9 is a description of the shaping process of the shoulder in a high-shielding tube manufacturing method according to another embodiment of the present invention It is for the drawing. And, Figure 10 is a view for explaining a tube manufacturing method using a shoulder formed in Figure 9, Figure 11 is a flow chart for explaining a high-shielding tube manufacturing method according to another embodiment of the present invention.

As shown therein, the high-shielding tube according to another embodiment of the present invention first forms a body of a laminating method, processing a primary shoulder made of aluminum, and a resin on the inner and outer surfaces of the primary shoulder. Forming a corrosion resistant layer and a surface layer to form a secondary shoulder, and bonding the secondary shoulder and the body to form a unit.

The body is used in the form of a roll using a laminate sheet having a gas barrier layer as in the above-described embodiment, in the embodiment of the present invention is characterized in that the bonding process in forming the shoulder and the body integrally .

Referring to the shaping process of the shoulder according to another embodiment of the present invention.

First, an aluminum plate having a predetermined size or a billet (billlet) of aluminum agglomerate, and the primary shoulder is formed through this press molding, such a shoulder forming process is the same as the above-described embodiment.

Second, to form a corrosion resistant layer to prevent corrosion on the inner surface of the press-formed primary shoulder, this corrosion-resistant layer forming process is also carried out in the same manner as in one embodiment.

Third, to form an adhesive layer by coating an adhesive resin for adhesion reinforcement on the outer surface of the primary shoulder formed with a corrosion resistant layer as described above. This adhesive layer is used as the liquid phase of the adhesive of the ethylene-based resin is applied to the cylinder and then heated for approximately 15 minutes at 150 ℃ ~ 250 ℃ for 5 minutes to maintain the adhesiveness and this process is also the same as the embodiment Is carried out.

Fourth, as described above, the primary shoulder on which the adhesive layer is formed forms a surface layer again on its outer surface to form a secondary shoulder. In this case, the surface layer is formed of a polyethylene-based resin by a molding injection method.

On the other hand, the step of printing on the outer surface of the primary shoulder in the step before forming the surface layer of the polyethylene-based resin may further include, in the case of printing in the step that the adhesive layer is not formed on the outer surface of the primary shoulder In order to improve the printing process by stabilizing the elasticity of the adhesive layer and the surface layer carried out in a later step.

Fifth, the secondary shoulder and the body with the surface layer formed as described above by the thermal welding to complete the tube. That is, the secondary shoulder and the body are bonded by welding by heating the aluminum layer using ultrasonic waves or high frequency while the secondary shoulder on which the surface layer is formed is in contact with one side opening of the body.

As described above, once again the main technical features in another embodiment of the high-breaking tube manufacturing method according to the present invention, each of the inner and outer surfaces of the primary shoulder formed by molding the tubing body in the form of a roll, press-processed aluminum After forming a resin layer to form a secondary shoulder, the body and the secondary shoulder thus formed are joined by thermal welding to form a tube.

The tube thus formed may be sealed by welding after filling the contents through the other opening of the body as in the above-described embodiment.

On the other hand, the present invention is not limited to the described embodiments, it is apparent to those skilled in the art that various modifications and variations can be made without departing from the spirit and scope of the present invention. Therefore, such modifications or variations will have to belong to the claims of the present invention.

In the method of manufacturing a high-breaking tube constructed and operated as described above, in forming a tube, an aluminum billet is pressed to form a primary shoulder, and the molded primary shoulder is integrated with a roll-processed body by a laminate sheet to form a tube. Since the present invention provides a useful effect that can fundamentally solve problems such as deterioration in the contents retention and the discoloration of the shoulder due to the contents transition caused by the conventional shoulder portion is molded as a simple injection molding.

In other words, since the entire tube ensures complete gas barrier properties, the contents can be significantly improved compared to the existing tubes, thereby improving reliability of the contents.

In addition, since printing is performed in a state where the primary shoulder is processed and a transparent resin is coated on the outer surface thereof, the printing quality can be maintained well and the variety of printing methods can be provided.

Claims (5)

Tubing the laminate sheet including the gas barrier layer in the form of a roll to form a body; Pressing the aluminum billet or strip to form a primary shoulder; Forming a corrosion resistant layer on the inner surface of the primary shoulder with a phenolic resin; Forming a surface layer integrally of the primary shoulder and the outer surface of the body with a polyethylene-based resin in a state in which the primary shoulder is positioned at one side of the opening of the body; High-breaking tube manufacturing method comprising a. The method of claim 1, wherein in the previous step of forming the surface layer of the polyethylene-based resin, to form an adhesive layer of an adhesive resin for adhesion reinforcement on the outer surface of the primary shoulder, which is 5 to 15 minutes at 150 ℃ ~ 250 ℃ High-breaking tube manufacturing method characterized in that it further comprises a heating step of heating. The method of claim 1 or 2, further comprising the step of printing on the outer surface of the primary shoulder in a step before forming the surface layer. Tubing the laminate sheet having a gas barrier layer in the form of a roll to form a body; Pressing the aluminum billet or strip to form a primary shoulder; Forming a corrosion resistant layer of a phenol-based resin to prevent corrosion of the inner surface of the primary shoulder; Forming a secondary shoulder formed by extrusion molding a polyethylene-based resin on an outer surface of the primary shoulder to form a surface layer; Bonding the secondary shoulder and the body by thermal welding to integrate the second shoulder and the body; High-breaking tube manufacturing method comprising a. The method according to claim 4, further comprising a heating step of forming an adhesive layer made of an adhesive resin for adhesion reinforcement on the outer surface of the primary shoulder on which the corrosion resistant layer is formed, and heating it at 150 ° C to 250 ° C for 5 to 15 minutes. High-breaking tube manufacturing method characterized in that.

Images