JP6554289B2 - Containment bag - Google Patents

Description

  The present invention relates to a storage bag, and is particularly suitable for storing a sticky or adhesive storage object that is softened and can be filled by being heated to a melting point or higher of a general-purpose resin such as a polyolefin resin. Regarding the storage bag.

As the material of the storage bag, it is common to use polyolefin resin such as polyethylene and polypropylene.
On the other hand, in the case where a storage target such as a gum base or a hot melt adhesive is stored in a storage bag, the storage bag can be more easily filled by providing fluidity by heating the storage target to lower the viscosity.

Patent No. 5590489 gazette

Depending on the object to be accommodated, there is a case where the viscosity cannot be filled unless heated at a temperature higher than the heat resistance temperature of a general resin such as polyolefin (for example, about 120 ° C.). In addition, there may be an object to be accommodated in which the viscosity becomes low and the adhesiveness or the adhesiveness is increased at the same time.
An object of the present invention is to provide a storage bag having a high filling temperature and suitable for storing a sticky or adhesive storage object.

In order to solve the above-mentioned problems, the present invention is a storage bag for storing an adhesive or adhesive storage object having a filling temperature of 120 ° C. or higher.
A bag body made of a heat-resistant resin having a heat-resistant temperature higher than the filling temperature;
And a release layer coated on the first surface to be in contact with the object to be stored in the bag body.
The accommodation bag can be easily filled by heating and softening the accommodation object to the filling temperature. Even if the storage object is heated to the filling temperature, the storage bag can be prevented from melting or deteriorating, and the storage object can be stably stored. Moreover, when the release layer is in contact with the object to be stored, the storage bag can be easily peeled from the object to be stored when the object to be stored is used.

The material to be contained only needs to have adhesiveness or adhesiveness at least when heated and melted, and the viscosity or adhesiveness may decrease at normal temperature.
The storage target is made of, for example, polyisobutylene resin.
The filling temperature of the accommodation object is about 120 ° C. or higher, preferably about 150 ° C. to 200 ° C., more preferably about 170 ° C.
On the other hand, the melting point of the heat resistant resin is preferably about 180 ° C. or higher, more preferably about 200 ° C. or higher.

The heat resistant resin is preferably an engineering plastic. Thereby, the heat resistance of the heat resistant resin can be secured.
Specifically, the heat-resistant resin is preferably one selected from the group consisting of polyamide, polybutylene terephthalate, polyacetal, and polyetheretherketone.

  The release layer is preferably made of silicone resin. By this, the heat resistance of the release layer can be secured.

It is preferable that the said bag main body consists of a cylindrical film, and the one end part of the cylinder length direction of the said cylindrical film becomes a sealing part by sealing by welding.
At the time of producing the accommodation bag, it is preferable that the first surface constitutes the outer surface of the bag body, so that the release layer covers the outer surface of the bag body. Accordingly, the release layer may be applied to the outer surface of the bag body, and the application work can be facilitated.
When filling the storage object, the storage bag is turned over and the inner surface and the outer surface are turned over. Thereby, the sealing portion is disposed inside the bag body. And since the said 1st surface comprises the inner surface of the said bag main body, the said mold release layer will cover the inner surface of the said bag main body. Therefore, the filled storage object comes in contact with the release layer. This makes it possible to secure the ease of separation between the storage subject and the storage bag.

  According to the storage bag of the present invention, it is possible to reliably withstand the heating temperature during filling of the storage object, and the storage object can be stably stored. Further, even when the object to be stored is sticky or adhesive, the object to be stored and the storage bag can be reliably peeled off during use.

Fig.1 (a) is a front view which shows the accommodation bag which concerns on one Embodiment of this invention in the state before preparation-filling of the accommodation target object. FIG.1 (b) is a front view which shows the said storage bag in the state at the time of the filling of the accommodation target object. FIG. 2 is a cross-sectional view of the storage bag along the line II-II in FIG. FIG. 3 is a cross-sectional view taken along line III-III in FIG. FIG. 4 is a cross-sectional view taken along the line IV-IV in FIG. FIG. 5 is a cross-sectional view taken along the line V-V in FIG. 1 (b), showing the accommodation bag in a state when the accommodation object is filled. FIG. 6 shows the manufacturing process of the storage bag, and FIG. 6 (a) is a front view of the continuous tubular film body to be the bag body. FIG. 4B is a front view showing a release layer coating step, a sealing step, and a cutting step.

Hereinafter, an embodiment of the present invention will be described with reference to the drawings.
FIG. 1 shows the storage bag 1. As shown by the arrow in FIG. 5B, the accommodation object 9 is accommodated in the bag inner chamber 1a (inside) of the accommodation bag 1. The accommodation object 9 is, for example, a gum base, and its main component is a polyisobutylene resin, preferably a medium molecular weight polyisobutylene. The degree of polymerization of polyisobutylene is preferably about 50 to 1000, more preferably about 100 to 500. The storage object 9 is semi-solid at normal temperature, and is softened by being heated to the filling temperature, and has a viscosity that can be filled in the storage bag 1 (specifically, approximately the same as water scale) And the tackiness is increased. The filling temperature of the storage subject 9 is higher than the melting point (for example, about 80 ° C. to 120 ° C.) of a general purpose resin such as polyolefin, preferably about 150 ° C. to 200 ° C., more preferably about 170 ° C.

  As shown in FIGS. 3 and 4, the storage bag 1 includes a bag body 10 and a release layer 20. As shown in FIG. 2, the bag body 10 is composed of a tubular film 11. The thickness of the bag body 10, that is, the tubular film 11, is preferably about several tens of μm to 1 mm or less. 3 to 5, the thickness of the tubular film 11 is exaggerated. The material of the cylindrical film 11 is a heat resistant resin. The melting point (heat-resistant temperature) of this heat-resistant resin is sufficiently higher than the melting point (for example, about 80 ° C. to 120 ° C.) of general-purpose resins such as polyolefin, and more preferably higher than the filling temperature of the accommodation object 9. Is about 180 ° C. or higher, more preferably 200 ° C. or higher. As such a heat-resistant resin, engineering plastics can be used. Specifically, polyamide, polybutylene terephthalate, polyacetal, polyether ether ketone (PEEK), or the like can be used. Preferably, the cylindrical film 11 is made of polyamide, more preferably, made of 6,6 polyamide (6,6-nylon (registered trademark)).

  As shown to Fig.1 (a), the one end part (lower end part in the figure) of the cylinder length direction of the cylindrical film 11 is sealed by welding (heat seal), and the sealing part 13 is comprised. ing. The other end part (upper end part in the figure) of the cylindrical film 11 is the opening part 10c.

  As shown in FIGS. 1A and 3, a release layer 20 (a mesh pattern portion in FIG. 1) is coated over the entire first surface 11 a of the tubular film 11. The release layer 20 is made of, for example, a silicone resin. The thickness of the release layer 20 is preferably about several μm or less. In FIGS. 3 to 5, the thickness of the release layer 20 is exaggerated.

  As shown in FIGS. 1A and 4, when the storage bag 1 is manufactured (before the storage target 9 is filled), the first surface 11 a is directed outward and constitutes the outer surface of the storage bag 1. doing. Therefore, the outer surface of the containing bag 1 is covered with the release layer 20. The release layer 20 is not provided on the inner surface of the containing bag 1 (the second surface 11b on the back side of the first surface 11a).

  In contrast, as shown in FIGS. 1B and 5, the inner and outer surfaces of the containing bag 1 are turned over when the containing object 9 is filled. Thereby, the 1st surface 11a comprises the inner surface of the accommodation bag 1 by facing the bag inner chamber 1a, and the outer surface of the accommodation bag 1 is comprised by the 2nd surface 11b facing outward. Therefore, the inner surface of the storage bag 1 is covered with the release layer 20. The lower end portion of the tubular film 11 is folded back to the inside of the bag body 10, and the sealing portion 13 is disposed inside the bag inner chamber 1a.

Containment bag 1 is manufactured and used as follows.
<Cylinder film continuum production process>
As shown to Fig.6 (a), the cylindrical film continuous body 19 which should become several cylindrical film 11 is produced by shape | molding heat resistant resin, such as 6, 6 polyamide, in a cylinder shape. For example, the heat resistant resin can be formed into a cylindrical continuous film by using an inflation film molding machine (not shown). The outer peripheral surface of this cylindrical film continuous body 19 becomes the 1st continuous surface 19a corresponding to the 1st surface 11a.

<Releasing layer application process>
As shown in FIG. 6B, the release layer 20 is applied to the entire circumference of the first continuous surface 19 a of the cylindrical film continuous body 19. The application operation is performed using, for example, a pair of application rollers 2. At this stage, since the first continuous surface 19a (and hence the first surface 11a) is directed outward, the release layer 20 can be applied easily.

<Sealing process>
Next, the sealing part 13 is formed by sealing the predetermined position of the cylindrical film continuous body 19 in the cylinder length direction (left and right in FIG. 6B) by heat sealing using the heat sealing machine 3.
<Cutting process>
Then, the vicinity position of the sealing part 13 of the tubular film continuous body 19 is cut using the cutter 4. Thereby, the cylindrical film 11 is cut out.
The order of the sealing step and the cutting step may be reversed. The welding and sealing may be performed simultaneously with cutting (fusion cutting).

  By this, the storage bag 1 is completed. At this stage, the first surface 11 a is directed to the outside of the storage bag 1, and the second surface 11 b is directed to the inside of the storage bag 1. Therefore, the outer surface of the storage bag 1 is covered with the release layer 20.

<Turning process>
As shown in FIG. 1 (b) and FIG. 5, when filling the storage target object 9 in the storage bag 1, the storage bag 1 is turned over and turned over. Accordingly, the second surface 11 b is directed to the outside of the storage bag 1, and the first surface 11 a is directed to the inside of the storage bag 1. Therefore, the inner surface of the storage bag 1 is coated with the release layer 20. Moreover, the bottom part of the storage bag 1 is folded inward, and the sealing part 13 is arrange | positioned inside the bag inner chamber 1a.

<Filling process>
Separately, the storage subject 9 is softened by heating to, for example, about 170.degree. The accommodation object 9 is injected and filled into the bag inner chamber 1a through the opening 10c.
Here, the bag body 10 is made of a heat-resistant resin such as 6, 6 polyamide, and the melting point thereof is 200 ° C. or more, so the bag body 10 can sufficiently withstand the filling temperature of the storage object 9. Moreover, since the release layer 20 is made of a heat-resistant silicone resin, it can sufficiently withstand the filling temperature. As a result, the storage bag 1 can be prevented from being melted or degraded by the heat of the storage object 9, and the storage object 9 can be stably stored in the bag inner chamber 1a.

  The filled storage object 9 is in direct contact with the release layer 20. Therefore, when the accommodation object 9 is used, the accommodation object 9 can be reliably and easily peeled from the accommodation bag 1. By this, the ease of use of the storage bag 1 can be secured.

The present invention is not limited to the above embodiment, and various modifications can be made without departing from the spirit of the present invention.
For example, the storage target 9 may be any adhesive or adhesive substance that becomes a fluid that can be filled by heating to a melting point (for example, about 120 ° C.) of a polyolefin resin or the like, and is not limited to the gum base It may be a hot melt adhesive or the like.
The material of the release layer 20 is not limited to silicone resin, and may be fluorine resin.
The material of the tubular film 11 (or the tubular film continuous body 19) is not limited to the polyamide resin, and may be polybutylene terephthalate, polyacetal, PEEK or the like.
The release layer 20 may be coated on the end surface of the sealing portion 13 or the like.

  The present invention is applicable to a storage bag for containing a gum base made of, for example, polyisobutylene.

1 Containment bag 1a Bag inner chamber (inside of the storage bag)
9 Contained Object 10 Bag Body 13 Sealing Part 11 Cylindrical Film 11a First Surface 20 Release Layer

Claims (8)

A storage bag for storing an object to be stored having a temperature of 120 ° C. or higher and sticky or adhesive,
A bag body made of a heat-resistant resin having a heat-resistant temperature higher than the filling temperature;
And a release layer coated on the first surface to be in contact with the storage target in the bag body , the bag body is made of a cylindrical film, and one end of the cylindrical film in the cylinder length direction is It becomes a sealing part by being sealed by welding,
The first surface constitutes the outer surface of the bag body, so that the release layer covers the outer surface of the bag body,
A storage bag characterized in that the seal portion is disposed outside the bag body, and the release layer is also coated on the outer surface of the seal portion .   A storage bag for storing an object to be stored having a temperature of 120 ° C. or higher and sticky or adhesive,
  A bag body made of a heat-resistant resin whose heat-resistant temperature is higher than the filling temperature;
  A release layer coated on the first surface to be in contact with the accommodation object in the bag body;
  The bag body is made of a tubular film, and one end portion of the tubular film in the tube length direction is sealed by welding, thereby forming a sealed portion.
  The first surface constitutes the inner surface of the bag body, so that the release layer covers the inner surface of the bag body,
  The containing bag, wherein the sealing portion is disposed inside the bag body, and the release layer is also coated on the outer surface of the sealing portion.   The accommodation bag according to claim 1, wherein the release layer is also coated on an end face of the sealing portion. The accommodation bag according to any one of claims 1 to 3, wherein the accommodation object is made of polyisobutylene resin. The storage bag according to any one of claims 1 to 4, wherein the heat-resistant resin has a melting point of 180 ° C or higher. The heat-resistant resin, the container bag according to any one of claim 1 to 5, characterized in that an engineering plastic. The accommodation bag according to any one of claims 1 to 6 , wherein the heat resistant resin is one selected from the group consisting of polyamide, polybutylene terephthalate, polyacetal, and polyether ether ketone. The release layer, the container bag according to any one of claim 1 to 7, characterized in that it is composed of a silicone resin.

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