JP2018177231A - Manufacturing method of degassing valve - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a manufacturing method of a degassing valve that is not necessary for injecting viscose fluid before attached to a container and that is possible to manufacture the degassing valve with consistent quality.SOLUTION: A manufacturing method of a degassing valve 1 includes a piercing process for piercing a hole in a first film attached to a mount, an application process for applying a viscose fluid linearly to a surface of the first film through the hole, and an adhesion process for laminating a second film on a surface of the first film and adhering the first film and the second film at a site sandwiching the viscose fluid.SELECTED DRAWING: Figure 6

Description

  The present invention relates to a method of manufacturing a degassing valve.

  Coffee, miso, pickles, fermented foods and the like are sealed and stored in a container such as a packaging bag in order to keep the food fresh. Since such food products generate gas, a gas venting hole is opened in the container to evacuate the gas, and a gas venting valve is installed here. As a valve for degassing, there is a label-like degassing valve 1 which can be simply attached to a container and used (for example, Patent Documents 1 and 2).

  The degassing valve 1 has a structure in which a cover film is laminated on a base film having a vent. The base film and the cover film have bonded portions bonded so as to sandwich the vent and non-bonded portions which are not bonded, and the non-bonded portion functions as a gas discharge flow path. Normally, the base film and the cover film are in close contact with each other at the non-adhesion site, but when the pressure inside the container exceeds a predetermined pressure due to the gas generated in the container, the cover film at the non-adherence site separates from the base film A gas discharge passage is formed, and the gas in the container is discharged from the gas vent holes and the vent holes through the gas discharge passage.

  The degassing valve has a function to prevent the inflow of gas (air) from the outside into the container from the outside by bringing the base film and the cover film in intimate contact in close contact with each other when the pressure in the container is lower than the predetermined pressure. Required For this reason, a viscous fluid such as silicone oil is injected from an air vent with an injector or the like so that the base film and the cover film are in close contact with each other, and a viscous fluid film is formed between the base film and the cover film. The removal valve is stuck on the container.

JP 7-291306 A JP, 2006-62277, A

  Since the viscous fluid is injected between the base film and the cover film before pasting to the container, the operation before pasting becomes complicated. In addition, it is difficult to form a film of homogeneous viscous fluid between the base film and the cover film, and it is difficult to secure a certain quality because the viscous fluid is injected from the vent.

  The present invention has been made in view of the above-mentioned matters, and an object thereof is a degassing valve which does not require injecting a viscous fluid before sticking to a container, and which can manufacture a degassing valve of constant quality. It is in providing a manufacturing method.

The method for manufacturing a gas release valve according to the present invention is
Drilling a hole in the first film attached to the backing;
Applying a viscous fluid in a straight line passing through the holes on the surface of the first film;
Bonding a second film on the surface of the first film, and bonding the first film and the second film at portions sandwiching the viscous fluid;
It is characterized by

In addition, using the band-shaped first film,
In the punching step, a plurality of the holes are formed linearly in the first film along the longitudinal direction of the first film;
In the application step, it is preferable to apply the viscous fluid in a straight line connecting a plurality of the holes.

  Moreover, it is preferable to provide the cutting process which makes a cut of the closed loop used as the outline of the said gas release valve in the said 1st film and the said 2nd film after the said adhesion process.

  Moreover, it is preferable to provide the peeling process which peels from the said base paper leaving the location enclosed by the said closed loop of a said 1st film and a said 2nd film after the said cutting process.

  In the method for manufacturing a degassing valve according to the present invention, it is not necessary to inject a viscous fluid before sticking to a container, and it is possible to manufacture a homogeneous degassing valve.

FIG. 1 (A) is a plan view showing the manufacturing status of the degassing valve, and FIG. 1 (B) is a cross-sectional view taken along the line A-A 'of FIG. 1 (A). 2 (A) is a plan view showing the manufacturing status of the degassing valve, FIG. 2 (B) is a cross-sectional view taken along the line AA 'of FIG. 2 (A), and FIG. 2 (C) is a line B- of FIG. It is B 'sectional drawing. It is a perspective view which shows a mode that the viscous fluid is apply | coated. 4 (A) is a plan view showing the manufacturing status of the degassing valve, FIG. 4 (B) is a cross-sectional view taken along line AA 'of FIG. 4 (A), and FIG. 4 (C) is B- of FIG. It is B 'sectional drawing. 5 (A) is a plan view showing the manufacturing status of the degassing valve, FIG. 5 (B) is a cross-sectional view taken along the line AA 'of FIG. 5 (A), and FIG. 5 (C) is a line B- of FIG. It is B 'sectional drawing. 6 (A) is a plan view of the manufactured degassing valve, FIG. 6 (B) is a cross-sectional view taken along line AA 'of FIG. 6 (A), and FIG. 6 (C) is line B-B of FIG. 'It is a sectional view. It is a disassembled perspective view which shows the structure of a degassing valve. It is a perspective view which shows the use condition of a degassing valve.

  The manufacturing method of the degassing valve according to the present embodiment will be described with reference to the drawings. The manufacturing method of the degassing valve includes a piercing step, a coating step, a bonding step, a cutting step, and a peeling step.

  First, as shown to FIG. 1 (A) and (B), the 1st film F1 stuck on backing paper Se is prepared. The first film F1 is a film to be a base film of the degassing valve. An adhesive layer is provided on the back surface of the first film F1 so as to be attached to the container. Here, an example will be described in which a plurality of degassing valves are manufactured using a strip-shaped long first film F1 wound in a roll shape as the first film F1.

  First, in the perforation step, as shown in FIGS. 2A to 2C, a hole Ha of a predetermined shape to be a vent is opened in the first film F1. For example, the hole Ha may be punched out of the backing sheet Se using a punch or the like having a predetermined shape to open the hole Ha in the first film F1. The hole Ha is a vent of the gas release valve.

  A plurality of holes Ha may be formed in a straight line at predetermined intervals continuously in the longitudinal direction of the strip-shaped first film F1. In addition, a plurality of holes Ha may be opened continuously in the short direction of the strip-shaped first film F1. Here, although three holes Ha are opened in the short direction of the strip-shaped first film F1, it may be formed more or less.

  Subsequently, the coating step will be described. In the coating step, a viscous fluid is applied onto the first film F1. The viscous fluid is applied in a straight line through the holes Ha. Thereby, a film of viscous fluid is formed on the surface of the first film F1.

  The application of the viscous fluid can be performed, for example, as shown in FIG. Here, the viscous fluid is applied using the application roller 30 provided with the application unit 31. The application roller 30 has an application section 31 that goes around the outer peripheral surface. The application unit 31 may have any configuration as long as it holds a viscous fluid on the surface and can apply the first film F1. For example, the application unit 31 may be a viscous fluid from a porous member such as a sponge. Can be mentioned. The application roller 30 is rotated in a state where the application section 31 of the application roller 30 is in contact with the first film F1. Thereby, as shown in FIG. 3, it is a surface of the 1st film F1, and viscous fluid can be continuously applied in the shape of a straight line which passes along hole Ha.

  In the form of supply of the viscous fluid to the coating unit 31 and the form of coating on the first film F1, the viscous fluid is attached to the surface of the coating unit 31, and the viscous fluid is transferred to the first film F1. It can be mentioned. Moreover, it is the application roller 30 which can hold | maintain a viscous fluid inside, Comprising: The form etc. which discharge and apply a viscous fluid from the application part 31 etc. are mentioned using what can be supplied to the application part 31 from the application roller 30 inside. .

  The viscous fluid to be used may be, for example, silicone oil or the like as long as it can be applied to the first film F1 and the adhesion between the base film and the cover film can be secured.

  Subsequently, the bonding step will be described. In the bonding step, as shown in FIGS. 4A to 4C, the second film F2 is laminated on the first film F1, and the first film F1 and the second film F2 are bonded. Do. The second film F2 is a film to be a cover film of the degassing valve. Similarly to the first film F1, the second film F2 uses a belt-like film.

  The bonding site between the first film F1 and the second film F2 is a site where the viscous fluid is not applied. That is, the bonding site is the site that sandwiches the hole Ha and the viscous fluid film. The adhesion between the first film F1 and the second film F2 may be performed using a known adhesive or pressure-sensitive adhesive. Alternatively, the second film F2 having a pressure-sensitive adhesive layer in advance at the bonding site may be laminated and adhered onto the first film F1. Alternatively, when laminating the second film F2, an adhesive or the like is applied to the surface of the first film F1 or the back surface of the second film F2, and the second film F2 is laminated on the first film F1. It may be adhered. Moreover, you may adhere | attach the 1st film F1 and the 2nd film F2 by the method which can be adhere | attached, such as ultrasonic welding other than adhesion | attachment using an adhesive agent or an adhesive.

  Subsequently, the cutting step will be described. As shown in FIGS. 5A to 5C, the first film F1 and the second film F2 are cut in a closed loop. The shape of this closed loop is the outer shape of the degassing valve. The cut of the closed loop may be performed by a known method, for example, by using a cutting roll with a closed loop blade protruding on the surface and rotating while pressing the cutting roll against the first film F1 and the second film F2 The first film F1 and the second film F2 can be cut.

  Subsequently, the peeling step will be described. In the peeling step, unnecessary portions of the first film F1 and the second film F2, ie, portions not enclosed in a closed loop are peeled from the mount Se.

  As described above, as shown in FIGS. 6A to 6C and FIG. 7, the cover film 20 is laminated and bonded onto the base film 10 having the vent holes Hb, and is adhered to the mount Se. Can be manufactured.

  The degassing valve 1 is in the form of a label, and the back surface of the base film 10 is provided with an adhesive layer. Therefore, the degassing valve 1 is taken one by one from the backing sheet Se, as shown in FIG. The vent holes Hb of the degassing valve 1 are aligned with each other, and the degassing holes Hc are plugged and used.

  As shown in FIG. 7, the degassing valve 1 has a structure in which the cover film 20 is laminated on the base film 10 having the vent holes Hb, and the base film 10 and the cover film 20 are vent holes Hb. The bonding site Bo which is bonded so as to sandwich and the non-bonding site Nb which is sandwiched between the bonding sites Bo. In the non-adhesive portion Nb, a film of viscous fluid is provided between the base film 10 and the cover film 20.

  Although the base film 10 and the cover film 20 are in close contact with each other at the non-bonded portion Nb, when the inside pressure of the container Pa exceeds a predetermined pressure due to the gas generated in the container Pa, the cover film 20 of the non-bonded portion Nb is the base film A gas discharge passage is formed apart from 10, and functions to discharge the gas in the container Pa from the gas venting hole Hc and the vent hole Hb through the gas discharge passage. Then, in a state in which the pressure in the container Pa is lower than the predetermined pressure, the base film 10 and the cover film 20 in the non-adhered portion Nb are in close contact with each other via the viscous fluid film, and the gas from the outside into the container Pa It exerts a function to control the inflow.

  Since the degassing valve 1 manufactured by the method for manufacturing the degassing valve according to the present embodiment is provided with a film of viscous fluid between the base film 10 and the cover film 20, the container Pa is used conventionally as in the prior art. It is not necessary to inject viscous fluid from the vent Hb before sticking.

  In addition, since the viscous fluid is applied to the surface of the first film F1 before bonding the second film F2, the film thickness of the viscous fluid can be made substantially constant. For this reason, constant quality of the degassing valve 1 obtained is secured.

  Examples of the first film F1 and the second film F2 include films made of resin such as polyethylene and polypropylene, but any material can be used as long as it exhibits the function as a gas release valve. It may be configured.

  Further, although the example using the strip-shaped first film F1 and the second film F2 has been described above, the present invention is not limited to this, and the first sheet F1 and the second film F2 having a rectangular shape may be used. You may use.

  Moreover, although the method to manufacture a several degassing valve continuously was demonstrated, you may manufacture one each. For example, using the first film F1 and the second film F2 previously fitted to the outer shape of the degassing valve, the holes Ha are opened in the first film to apply the viscous fluid in a straight line through the holes, and then The second film F2 may be laminated and bonded to the first film F1. In this case, the cutting process and the peeling process become unnecessary.

  In addition, in the punching process, the base film Se may not be cut out, and the first film F1 may be cut and the first film F1 at the location may be separated from the base sheet Se to form the hole Ha.

  Further, in the drilling step, rectangular holes with rounded corners are formed, but the shape of the holes may be circular, elliptical, polygonal or the like.

  In addition, in the cutting process, a rectangular closed loop of a rounded corner is cut, but the cut may be in the shape of a desired degassing valve to be manufactured, such as a circular shape, an elliptical shape, or a polygonal shape.

DESCRIPTION OF SYMBOLS 1 Degassing valve 10 Base film 20 Cover film 30 Coating roller 31 Coating part F1 1st film F 2 2nd film Se Base paper Ha hole Hb Air vent Hc Degassing hole Bo Bonding part Nb Non-bonding part Pa container

The method for manufacturing a gas release valve according to the present invention is
Drilling a hole in the first film attached to the backing;
Applying a silicone oil in a straight line passing through the holes on the surface of the first film;
Bonding a second film on the surface of the first film, and bonding the first film and the second film at portions sandwiching the silicone oil ;
It is characterized by

In addition, using the band-shaped first film,
In the punching step, a plurality of the holes are formed linearly in the first film along the longitudinal direction of the first film;
In the application step, it is preferable to apply the silicone oil in a straight line connecting a plurality of the holes.

Claims (4)

Drilling a hole in the first film attached to the backing;
Applying a viscous fluid in a straight line passing through the holes on the surface of the first film;
Bonding a second film on the surface of the first film, and bonding the first film and the second film at portions sandwiching the viscous fluid;
A method of manufacturing a degassing valve characterized by Using the first film in the form of a band,
In the punching step, a plurality of the holes are formed linearly in the first film along the longitudinal direction of the first film;
In the applying step, the viscous fluid is applied in a straight line connecting a plurality of the holes,
A method of manufacturing a degassing valve according to claim 1, characterized in that. After the bonding step, a cutting step is performed to cut the first film and the second film into a closed loop that is an outer shape of the gas release valve.
The method for producing a degassing valve according to claim 1 or 2, characterized in that After the cutting step, a peeling step of peeling from the mount leaving a portion enclosed by the closed loop of the first film and the second film;
A method of manufacturing a degassing valve according to claim 3, characterized in that.

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