JP2000079951A - Method of manufacture of foamed film with fastener, method of manufacture of packing bag and packin bag - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an automatic and continuous manufacture of foamed film having a fastener by a method wherein after a film is formed with many recesses, the film is adhered to a base film to seal the recesses, thereby formes a foamed film and at the same time a fastener is adhered to the portion where some protrusions in the foamed film. SOLUTION: A recess forming film 11 is supplied to a recess forming drum 1, this is heated by a film heating device 2 to form some recesses and then a recess forming film 15 is made. In addition, the recess forming film 15 and a base film 12 are laminated and supplied to an adhering roll 3, the films are heat melted with a pressing roll 4 to form a foamed film 16. Further, the foamed film 16 is supplied between a fastener adhering roll 6 and a foamed film pressing roll 7, both male and female members 13, 14 of fastener are supplied from a fastener storing tank 5 between the portion where the protrusions of the foamed film 16 are not present and the fastener adhering roll 6, then the foamed film having fastener is manufactured and the film is transferred to a bag forming section 8.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for manufacturing a bubble film with a jaw, a method for manufacturing a packaging bag, and a packaging bag. More specifically, a method of manufacturing a bubble film with an occluding tool for continuously manufacturing a bubble film having a large number of air chambers having a cushioning property and continuously integrating the occluding tool, and manufacturing a packaging bag for making a bag using the film Method and packaging bag.

[0002]

2. Description of the Related Art A bubble film is also called an air cap film. For example, a polyethylene film is formed into a film having a large number of concave portions, and then a polyethylene film as a back layer (base film) is adhered. Thus, a film having a large number of convex portions on one side, on which air is blocked and confined. This bubble film is
Taking advantage of features such as cushioning and heat insulation, cushioning material for packing or bag-making of this is used as a packaging bag. Also, when used as a packaging bag, similar to the case of a packaging bag using a general flat film, it is also known that a jaw is provided at the opening of the packaging bag for the purpose of sealing the contents and repeated use. Have been.

[0003] As a method of manufacturing a packaging bag using the bubble film with a jaw, there are (1) a method of bonding the bubble film to a normal packaging bag with a jaw by fusion or an adhesive. (2) There is a method of fixing the occlusal tool to a commercially available bubble film and then making a bag. However, in the method (1), it is practically difficult to automate and make the bonding of the bubble film automatic and continuous because of the bulkiness of the bubble film, the handling property (particularly after cutting), and the like. , Low productivity. Further, the bubble film is bonded to the outside of the packaging bag, and it is necessary to bond a separate film or the like to display the contents, and mass production is difficult anyway. Therefore, the method (2) can be considered in terms of productivity.

However, in the method (2), although the bubble film depends on the size of the bubble (air cap),
What secures the cushioning property is a relatively large and thick film. For this reason, it is very difficult to stick a long-wound bubble film using the occlusal tape continuous sticking device due to the bulk of the bubble film. That is, the winding figure is limited to several hundred meters, and it is necessary to stop the device many times and replace the bubble film,
Automation is difficult due to the fact that the rolled shape of the bubble film is not stable. In addition, the off-the-shelf bubble film has a large number of air chambers distributed throughout the film, and these air chambers hinder the attachment of the occlusal tape,
There is also a problem that sufficient attachment cannot be performed. Therefore, it has not been put to practical use because it causes human rights costs and high costs.

To solve these problems, there has been proposed a method of manufacturing a bubble sheet with a material for opening means (see Japanese Patent Application Laid-Open No. 64-56536). This method
In the process of manufacturing a bubble sheet having a large number of air chambers formed by processing a synthetic resin film used for packaging, etc., a bubble layer to be inserted and formed between the air chamber forming means and the pressurizing means is formed. The opening and closing means material in the form of a tape is continuously or intermittently inserted into the synthetic resin film for forming the back layer and the synthetic resin film for forming the back layer at a predetermined position. On a back film. Further, it is described that the air chamber forming function of a portion where the opening / closing means material is to be stuck is stopped to facilitate the sticking. This publication also discloses that the apparatus for manufacturing a bubble sheet with an opening means material is directly folded in two, and the bag is formed to a predetermined size by heat sealing or the like.

[0006] The above-mentioned improved production method aims to eliminate the difficulty in handling the foam sheet by continuously forming the foam sheet, attaching the material of the opening / closing means, and even in-line until the bag making. This is an excellent method. Specifically, the opening / closing means material is attached to the back film almost simultaneously with the back film attaching process subsequent to the air chamber forming process. As is apparent from the description and the drawings of the specification, the present invention is to attach the opening / closing means material to the back film side when attaching the bubble sheet and the back film. That is, although the manufacturing method of the packaging bag is an excellent method that enables continuous and automation, the packaging bag made by the bag making is not any different from the bag having the bubble film attached to the outside of the bag having the conventional opening / closing means. There is no change.

That is, the main body of the packaging bag is formed of a back film, and the outer surface is covered with a bubble film as a cushioning material. However, in this configuration, the outer surface of the bag body is a convex portion of the bubble film, and it is difficult to display the use as a packaging bag, contents, etc., or depending on the degree of sticking of the bubble film to the back film, Easy to peel off,
There is a problem that the features of the bag with the zipper (opening / closing means) that can be used repeatedly cannot be fully utilized,
It has not yet been widely used. Therefore,
Development of a manufacturing method of a packaging bag that can be used repeatedly for a long period of time by using a foam film, excellent in cushioning properties and heat insulation properties, can be repeatedly bite (opening / closing means) by integrating with a jaw tool (also called a chuck) Have been.

[0008]

SUMMARY OF THE INVENTION The present invention has been made under the above-mentioned circumstances, and is intended to produce a packaging bag having excellent performance using an air bubble film on which an occlusal tool is adhered and integrated.
Automation and continuity are possible as the manufacturing method of the occlusal device integrated foam film and the manufacturing method of the packaging bag, and the film for the packaging bag, which is commonly used, can be used without limitation as the base film (back film). It is an object of the present invention to provide a manufacturing method and a packaging bag excellent in cost, productivity and productivity.

[0009]

As a result of intensive studies on the above-mentioned problems, the present inventor performs in-line the process of forming the bubble chamber of the bubble film and the step of attaching the occluding tool, and specifies the position where the occluding tool is attached. As a result, they have found that the above problems can be solved, and have completed the present invention. That is, the present invention provides: (1) After forming a large number of concave portions in the concave portion forming film,
In order to block the recess, the film is attached to a base film to form a foam film, and at the same time as or before and after the attachment, an occlusion is formed on a side surface of the convex portion of the foam film, where no convex portion exists. A method for producing a bubble film with an occlusal tool, comprising attaching a tool. (2) The method for producing a cellular film with an occluding tool according to the above (1), wherein the attaching of the occluding tool is heat fusion of a tape with an occluding tool. (3) The method for producing a cellular film with an occluding tool according to the above (1) or (2), wherein the occluding tool is directly attached to the base film without the intervention of the concave portion forming film. (4) The method for producing a cellular film with an occlusal tool according to any one of (1) to (3), wherein a step of integrating another film with the side surface of the convex portion of the cellular film is added. (5) At least one side of the air bubble film with a jaw obtained by the method for producing the air bubble film with a jaw described in any one of (1) to (4) above is used, and the jaw is successively occluded, and a necessary portion is bitten. A method for producing a packaging bag with an articulating tool to be fused. (6) At least one surface is made of a bubble film having a base film as an outer surface, and a zipper-equipped packaging bag in which a zipper material is directly adhered onto the base material film at an opening; It is a packaging bag with a zipper as described in the above (b) which has a valve.

[0010]

BEST MODE FOR CARRYING OUT THE INVENTION According to the method for producing a cellular film with a jaw of the present invention, after forming a large number of concave portions in a film for a cellular film, the film is attached to a base film in order to close the concave portions. Then, an occlusal tool is attached to a portion where no convex portion exists on the side surface of the convex portion (anti-substrate film surface) at the same time as or before and after the application to a bubble film having a large number of convex portions. . That is, by performing in-line molding of the air chamber and the attachment of the jaw to become bubbles,
An object of the present invention is to solve the problem of bulky and difficult handling when each step is performed separately and independently. This in-line operation has already been proposed. However, the feature of the present invention is that the jaw is provided such that the base film is on the side of the convex portion of the bubble film, that is, the base film is on the outside of the packaging bag, and the bubbles (convex portion) of the bubble film are on the inside, preferably. In addition, the jaw is directly attached to the base film.

Here, the bubble film means that a synthetic resin film is processed into a film having a large number of concave portions by heating vacuum forming or pressure forming, for example, by a drum having a large number of concave portions on the outer periphery, and then the concave portions are closed. It is manufactured by integrally laminating a base film (back film) to be formed. The recesses have, for example, a diameter of 3 to 20 mm and a depth of 0.5 to 10 mm, and are regularly distributed. The synthetic resin film for forming the concave portion is not particularly limited, but a polyethylene resin is suitable in view of moldability of the concave portion, fusion property with the base film (back film), flexibility, cushioning property and the like. And
Examples thereof include linear low-density polyethylene, a polyethylene polymerized with a metallocene catalyst, and a copolymer of ethylene with an α-olefin such as butene-1, hexene-1, and octene-1. It should be noted that these polyethylene resins may be blended with an elastomer such as an ethylene-vinyl acetate copolymer or an ethylene-α-olefin elastomer.

The substrate film is not particularly limited as long as it can at least block the concave portions of the concave portion forming film. However, in general, the base film forms the main body of the packaging bag, and various films are selected depending on the use of the packaging bag. Therefore, as the base film, there is a polyethylene film having a heat-fusing property with the concave portion forming film alone, a coextruded multilayer film of the polyethylene resin and another resin, and a laminated film of other films. For example, nylon / polyethylene, polyester / polyethylene, vinylidene chloride-coated nylon / polyethylene, vinylidene chloride-coated polyester / polyethylene, polypropylene / ethylene / vinyl alcohol copolymer / polyethylene, polycarbonate / polyethylene, aluminum foil / polyethylene, paper / polyethylene, cloth / Polyethylene and the like, and if necessary, a multilayer is formed via an adhesive resin such as a maleic anhydride-modified polyolefin resin.

[0013] The resin component of these films may be blended with other resins, elastomers, various stabilizers, coloring agents, fillers, and the like, if necessary. Further, in the present invention, since this base film constitutes the outer surface of the packaging bag, it is possible to use various printed materials in the same manner as a normal packaging bag with a jaw. Therefore, the selection of the base film is appropriately selected in consideration of the strength, heat resistance, gas barrier properties, and the like, depending on the use of the packaging bag, the size, the article to be packaged, and the like.

Next, the present invention will be described with reference to the drawings. FIG. 1 is a conceptual diagram showing an example of the method for producing a bubble film with a jaw of the present invention. In FIG. 1, 1 is a forming drum for a concave portion (for an air chamber), 2 is a film heating device, 3 is a film sticking roll for forming a concave portion, 4 is a base film pressure roll, 5 is a storage device for an articulation tool, and 6 is an articulation tool. Adhering roll, 7 is a bubble film pressure roll, 8 is a bag making part, 9 is a concave part, 11
Is a concave part (air chamber) forming film, 12 is a base film, 13 is a jaw tool (female member), 14 is a jaw tool (male member), 15 is a concave part forming film, 16 is a bubble film,
Numeral 17 denotes a bubble film with an occlusal tool. In addition,
In FIG. 1, there is a portion in which the concave portion forming film, the concave portion of the bubble film, and the air bubble are omitted.

First, the recess for the air bubble (air chamber) may be formed by a known method. Specifically, as shown in FIG. 1, a concave (air chamber) forming film 11, which is a polyethylene film, is supplied to a concave (air chamber) forming drum 1 having a large number of concaves for forming an air chamber on an outer periphery thereof. The film is heated by the film heating device 2 to form a concave portion. That is, the concave (for air chamber) forming drum 1 is provided with a vacuum exhaust device and a temperature adjusting device, has on its surface a large number of concave portions in the form of bubbles (air chambers), and has a fine exhaust for air leading to the concave portion. It is a rotating drum having holes. That is, the polyethylene film softened by the heating device is formed so as to have a large number of concave portions by suction force for exhausting the concave portions, and the concave portion forming film 15 is obtained. This concave part forming film 15 and the other substrate film (multilayer film) 12 (12A: LLDP)
E, 12B: Nylon) in a laminated state so that the LLDPE layer side becomes the bonding surface.
And heated by a base film pressure roll 4,
Pressure and heat fusion. As a result, the base film 12 and the concave portion forming film 15 are bonded and integrated with each other by blocking the air in the concave portions, and the bubble film 16 having a large number of convex portions is formed.

In the production process of the bubble film,
For the next step, where the occlusal member is to be stuck, a concave (for air chamber) forming drum 1
So that the recess is not formed. As means for not forming the concave portion, there is a case where the concave portion is not provided on the drum itself. However, in order to cope with a change in the size of the packaging bag, it is preferable to fill the drum recesses at locations where the recesses are not desired to be formed with a blind plug during molding. Further, in the bubble film sticking step, it is preferable to stick the concave part forming film to the base film 12 avoiding the tentative tool sticking scheduled portion. Thereby, the occlusal tool can be directly adhered to the base film, and the adhesive strength can be increased and stabilized.

As the bubble film forming method, instead of providing a vacuum exhaust device and forming a concave portion by a suction force for exhausting the rotary drum, a compressed air method may be used, or an extruded core device may be further provided and pushed. You may shape | mold so that it may have many recessed parts. Further, if necessary, the film after the concave portion is formed, or after bonding with the base film, the bubble (air chamber) side, the convex portion side, and another film such as a polyethylene film heated by a separate heating device. Films can also be supplied and welded.

Next, the bubble film 16 is supplied between the jaw sticking roll 6 and the bubble film pressing roll 7, and the gap between the non-convex portion of the projecting surface of the bubble film 16 and the jaw sticking roll 6 is formed. In the meantime, the female member 13 and the male member 14 of the jaw material (jaw tape) are supplied from the jaw storage tank 5. By this heating and pressurizing, a foam film with an occlusal tool is manufactured. Next, it is sent to the bag making section 8.

Here, as the occlusal tool, a known band-shaped set of a female member and a male member, also called a chuck band,
Or it is composed of two sets and is usually provided in parallel with the opening side end inside the bag body. In this articulation tool, the female member and the male member can be repeatedly engaged and disengaged, and have a certain degree of occlusal strength. The material of the articulator is not particularly limited, and examples thereof include polyethylene, ethylene-α-olefin copolymer, ethylene-unsaturated carboxylic acid copolymer, and soft polypropylene. Particularly, LLDPE (linear low-density polyethylene) ), Low-density polyethylene, ethylene-vinyl acetate copolymer, and ethylene-acrylic acid copolymer are preferred from the viewpoint of ease of occlusion, occlusal strength, and the like.

According to the method for producing a cellular film with an occlusal tool of the present invention, the occlusal tool is affixed to the air bubble (air chamber) side of the cellular film, that is, the convex side, preferably directly to the base film, in the process of producing the cellular film. To wear. Here, the attachment of the occlusal tool is at the same time as or before and after the attachment of the base film and the concave-shaped molded film, and can be appropriately selected in consideration of various films, occlusal tools, and equipment to be used. Therefore, FIG. 1 is merely an example, and an occlusal tool may be attached to the base film before entering the concave forming film sticking roll 3, or the concave forming film sticking roll 3 and the base film adhesive may be applied. It can also be attached with a pressure roll 4. Here, as the attachment of the occlusal tool (occlusion tool tape), there are fusion, adhesion, and the like, and heat fusion is preferable.

An embodiment of a cellular film with an occluding tool obtained by the method for producing a cellular film with an occluding tool of the present invention will be described conceptually. FIG. 2 illustrates a cut surface conceptually illustrating a sticking structure and bag-making of the bubble film with a jaw tool of the present invention. In FIG. 2, (A) shows a multilayer base film 12 (A: LLDPE, B: nylon) at both ends of the film.
The male and female occlusal tools (13, 14) are directly adhered to each other, and the concave portion forming film 15 is not adhered to the central portion of the base film. (B)
(A) Another film 18 is integrated with the side surface of the convex portion of the bubble film. As a result, the inner side surface of the bag when it becomes a packaging bag becomes flat, and there is no gap between the projections as compared with the case of (A), which makes it suitable for packaging small items, powders and granules. (C) is a set of male and female occlusal tools 1
Reference numerals 3 and 14 are attached to the center of the bubble film with a space therebetween. (D) shows a case in which only the female bite 13 is attached to one end of the bubble film, and (E) shows a case in which only the male bite 14 is attached to one end. (F) is not a foam film, but can be combined with (D) to produce a packaging bag in which only one side is a foam film.

Next, in the method for manufacturing a packaging bag of the present invention, the occlusal tool is successively occlusally integrated with at least one side of the occlusal-equipped bubble film obtained by the method for manufacturing the occlusal tool foam film. It is manufactured by fusing necessary parts so that The method for producing the packaging bag can be appropriately selected and adopted from conventionally known methods. For example, in the case of FIG.
While folding the bubble film from the center, the male and female occlusal tools are engaged and guided to the bag making section, and both sides are heat-sealed to obtain a packaging bag. In the case of (C),
The female and male articulation tools are engaged in two, folded and guided to the bag making section, heat sealed on three sides, and cut and opened between the male and female articulation tools in an appropriate step. In general, a packaging bag is used to insert a packaged object after the bag is manufactured. However, in some cases, the packaged item can be inserted prior to heat sealing. In this case, the opening can be made by cutting the base film outside the jaw tool at the beginning of use. This method has a feature that the sealing property can be completely secured until the start of use.

(D) and (E) of FIG. 2 show one of the male and female occluding tools attached to the end of the bubble film. Occluded and guided. In this case, it is possible to produce a packaging bag having only one surface made of a foam film by combining with a general film which is not a foam film (F). In any case, a three-sided seal forms a packaging bag. In this case, the material of the front and back surfaces and printing are used as the base film, and when a single-sided bubble film is used, one side can be made transparent so that the contents can be confirmed. Further, there is a feature that introduction into a bag making apparatus is easily performed without requiring folding in two.

Next, in the packaging bag of the present invention, at least one side is made of a bubble film having a base film as an outer surface, and the inside of the bag is formed by a bubble portion (convex portion). It is a packaging bag with an articulation tool on which an articulation material is directly adhered. FIG. 3 is a conceptual diagram of an example of the packaging bag of the present invention.
Shown in In FIG. 3, (A): plan view, (B):
XX cutaway view of (A), 20 is a bubble (air chamber) [only partially shown]. That is, in the packaging bag, the base film constituting the bubble film is the outer surface of the bag, and the jig is directly attached to the base film constituting the bag main body in parallel with the bag opening 21. The heat seal part 22 as bag making is a three-way seal.

[0025] Thus, there is a feature that the attachment of the occlusal tool is reliable and that a general film printed or the like is used as the base film without any limitation. Further, the packing bag may be provided with an exhaust check valve 23 for discharging air or the like in the bag at a seal portion at the bottom or side of the bag body.
The exhaust check valve may have a known structure, but is preferably a polyethylene film, particularly a film made of LLDPE or a film made of low-density polyethylene manufactured using a metallocene catalyst. The check valve for exhaustion is for exhausting by pressing or using a vacuum after inserting the article to be packaged into the packaging bag. As a result, the inner volume of the packaging bag is reduced, and the article to be packaged is securely fixed with the bubble film, and corrosion and deterioration due to air are prevented. If necessary, a handle or a hanging string may be attached to the opening side.

The packaging bag of the present invention is characterized by the characteristics of the bubble film such as cushioning and heat insulating properties, the repetitive use of the occlusal tool by occlusal and detachment, the sealing property, and the use of an exhaust check valve in various fields. Used for For example, packaging of electronic / electric / mechanical parts, storage of glass / porcelain / porcelain tableware and the like, packaging for transportation, packaging of fine arts, various foods, transportation, bags for frozen / refrigerated foods and the like can be exemplified. In particular, the use of airtightness allows the use of an exhaust check valve for vacuum degassing and tight packaging with a bubble film, enabling simultaneous packaging of multiple dishes such as plates, reducing the volume and storing and transporting. It is expected to expand its application fields such as storage and storage.

[0027]

According to the present invention, it is possible to obtain a packaging bag which has excellent buffering properties and heat insulating properties and can be repeatedly opened and closed. Further, the attachment of the occlusal tool is reliable, and a film such as ordinary printing can be used as a surface material as a bag base film. In addition, as an intermediate product, storage of a bubble film or a film with a jaw that is difficult to handle such as bulkiness and irregularity,
No shipping problems. In addition, it is possible to improve productivity and reduce costs by continuous production and automation.

The packaging bag can be hermetically sealed and vacuum packed, and can be used as a buffer, heat insulating, or oxidation / corrosion resistant package for storing, transporting, storing electronic / electric / mechanical parts, fine arts, fragile items, foods, etc. Effective for packaging.

[Brief description of the drawings]

FIG. 1 is a conceptual diagram showing an example of a method for producing a bubble film with a jaw of the present invention.

FIG. 2 is a cross-sectional view conceptually illustrating a sticking structure and a bag-making process of the bubble film with a jaw tool of the present invention.

FIG. 3 is a plan view (A) showing an example of the packaging bag of the present invention;
It is a sectional view (B).

[Explanation of symbols]

 1: Depression (for air chamber) forming drum 2: Film heating device 3: Depression forming film sticking roll 4: Base film pressing roll 5: Jig storage part 6: Jig sticking roll 7: Bubble film pressing Roll 8: Bag-making part 9: Depression 11: Depression (air chamber) forming film 12: Base film 13: Jig (female member) 14: Jig (male) 15: Depression forming film 16: Bubble film 17 : Bubble film with jaw 20: Bubble (air chamber) 21: Bag opening 22: Seal 23: Check valve

 ──────────────────────────────────────────────────続 き Continued on the front page F term (reference) 3E064 AA04 AA05 BA21 BB03 BC20 EA04 FA01 GA01 HM01 HN13 HS07 HU03 3E066 AA22 BA05 CA01 CB03 DA10 DB01 FA13 GA10 JA21 KA10 LA16 MA01 NA41 NA47 NA48 NA60 3E075 AA05 BA42 BB02 DE16 GA03 4F100 AK01A AK01B AK01C AK04 AK07 AK41 AK46 AK62 AK68 AT00B AT00C BA02 BA03 BA07 BA10B BA10C DD02A DD04A DD04B DD05A DD05B DD22 DD28 DG10 EJ241 EJ40A GB15 GB17 JJ02 JK11 JL01

Claims (7)

[Claims] 1. After forming a large number of recesses in a film for forming a recess, the film is adhered to a base film to form a bubble film in order to close the recesses, and at the same time or before and after the attachment. The convex side surface of the bubble film,
A method for producing a foam film with an occlusal tool, comprising attaching an occlusal tool to a portion where no convex portion exists. 2. The method for producing a cellular film with an occlusal tool according to claim 1, wherein the attachment of the occlusal tool is heat fusion of a tape with an occlusal tool. 3. The method for producing a cellular film with an occlusal tool according to claim 1, wherein the occlusal tool is adhered directly to the base film without the intermediary of the concave portion forming film. 4. The method for producing a cellular film with an occlusal tool according to claim 1, wherein a step of integrating another film with the side surface of the convex portion of the cellular film is added. 5. The use of the cellular film with an occlusal device obtained by the method for producing a cellular film with an occlusal device according to any one of claims 1 to 4, wherein at least one side is used, and the occlusal device is successively occluded to melt a necessary portion. A method for manufacturing a packaging bag with a zipper to be worn. 6. A packaging bag with an occlusal tool, wherein at least one side is made of a bubble film having a base film as an outer surface, and the occlusal tool material is directly adhered on the base material film at the opening. 7. The packaging bag with a jig according to claim 6, further comprising an exhaust check valve.