JPH08164946A - Bag-like container - Google Patents

Abstract

PURPOSE: To obtain a bag-like container which has a sufficient heat-resistant strength, can be cooled with water and allows filled molten content to be cooled in a short period of time and to be discharged smoothly without deposition of the filled molten content on the inner surface. CONSTITUTION: A bag-like container is formed of a sheet or film of poly-4- methylpentene-1 and silicone treatment is applied on the inner surface. In addition, its content inlet can be sealed.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a bag-like container filled with an adhesive or the like. More specifically, it has sufficient heat resistance and can cool a melted filler in a short time. Moreover, the present invention relates to a bag-like container that can smoothly discharge a cooled filler without adhering to the inner surface thereof.

[0002]

2. Description of the Related Art In recent years, hot melt compounds, which can be applied to organic solvent regulations and have a short cooling and solidification time after coating, have been widely used as materials for pressure-sensitive adhesives and adhesives because of their high productivity. I've been told. This hot melt compound is basically composed of a base polymer such as a resin or an elastomer, a rosin derivative, a petroleum resin, a tackifier such as a polyterpene, and a viscosity modifier such as a wax, a liquid resin or an oil.

In particular, styrene-isoprene copolymer rubber (SIS), hydrogenated products thereof (SBS, SEBS) and other styrene elastomers, EPR, EBR, PBR and other α-olefin copolymers, ATAPP and other olefin elastomers. A synthetic rubber-based hot melt compound having a base polymer of 120 ° C. has a strong tack even at room temperature and causes blocking, which makes it difficult to maintain the product form in the form of pellets or chips.
It is directly poured into a container in a molten state at a temperature of 200 to 200 ° C., and cooled and solidified.

Conventionally, as a container into which a molten resin is poured, a paper container containing a thermoplastic heat-resistant resin film such as silicone-treated polyester resin, polyamide resin, polysulfone resin, 4-methylpentene resin, or the like, or a heat-resistant container A peelable resin container in which the inner surface of a thermoplastic resin molded container is treated with silicone is used.

However, since these containers are box-shaped open containers, the mouth cannot be completely sealed with a lid or the like. Therefore, water cooling cannot be adopted as a means for accelerating the cooling and solidification of the molten filling, and there is a problem that the cooling has to rely on means for radiative cooling for a long time in the air. . However, when radiatively cooling in air for a long time, it must be left in an open space in a high temperature state, which poses a problem of occupational safety and further causes thermal deterioration of hot melt over time. There is fear. Further, in order to avoid such a state, when cooling in air, it is possible to cool using cooled air, but even in that case, not only the cooling efficiency is lower than that of water, However, there is a difficulty in realizing it, such as the need for a large space that is shielded from the outside air for supplying cold air.

[0006]

SUMMARY OF THE INVENTION Therefore, an object of the present invention is to have sufficient heat resistance and to cool a melted filler in a short time, and moreover, to prevent the filler after cooling from adhering to the inner surface of the filler. The object is to provide a bag-shaped container that can be discharged to the inside.

[0007]

The present invention has been proposed to achieve the above object, and is characterized by having the following configuration. That is, according to the present invention, there is provided a bag-shaped container composed of a sheet or film formed of poly-4-methylpentene-1, the inner surface of which is treated with silicone and the content filling port. There is provided a bag-like container characterized in that the portion is formed so as to be able to be sealed.

[0008]

DETAILED DESCRIPTION OF THE INVENTION The technical feature of the present invention is that poly-4-methylpentene-1 is used as a material for forming a bag-shaped container.
Is adopted, and a silicone release layer is formed on the inner surface thereof, and the mouth for filling contents can be sealed. Thus, as a material for the bag-shaped container, poly-4-
By using methyl pentene-1, it is possible to obtain a heat resistance strength enough to accommodate and hold a melt at 120 ° C to 200 ° C inside, and by forming a silicone release layer on the inner surface, the filler is a bag. The peeling property is provided so that the container can be smoothly discharged without adhering to the inner surface of the container. Furthermore, since the bag-shaped container according to the present invention is configured so that the contents filling port can be sealed after filling the contents, it is possible to prevent the infiltration of water into the container, so that the contents can be cooled. As a means for promoting the solidification, the most economical and efficient water cooling can be adopted, and there is an advantage that the cooling time can be shortened.

The container according to the present invention is formed into a bag by sealing it by heat fusion using a film formed from poly-4-methylpentene-1 resin as a raw material by an inflation method or a T-die method. It is obtained by subjecting the inner surface to silicone treatment in order to impart releasability. The silicone treatment can be carried out by a method known per se such as coating a condensation type or addition reaction type releasing silicone or a UV curing type releasing silicone. This silicone treatment can obtain sufficient releasability regardless of whether the film is processed before being processed into a bag or after being processed into a bag. The thickness of the above-mentioned film is not particularly limited, and is naturally determined by the constraints of the film forming processing technology and the strength of the bag required to hold the filling (hot melt compound), but usually the filling is When the weight is less than 20 kg, the film thickness in the range of 20μ to 100μ is sufficient.

However, in the bag-shaped container provided by the present invention, after the hot melt compound in a molten state is filled, the opening of the bag has a melt seal such as a hot plate seal, a pulse seal, a high frequency seal, a binding cord, and a metal. It is preferably formed in, for example, a tubular shape so that it can be completely sealed by a hermetic seal such as a clip. It goes without saying that the sealing means is not limited to the above-mentioned sealing method, and may be a sealing method using a cap having a grooved tubular body separately welded to the opening. The container thus sealed can be easily cooled by pouring it into water or spraying it with water. Therefore, it is possible to shorten the cooling time in the container in which the entire container must be cooled after the content filler, and not only the work efficiency but also the deterioration prevention of the contents can be remarkably contributed.

Further, the treatment of an empty container after use of the hot melt compound has become a problem for the user in recent years due to environmental hygiene, but the container according to the present invention can be easily made into a compact state. Moreover, since it does not contain harmful components, no harmful gas is generated even if it is incinerated, and incineration is possible, which is convenient for treating empty containers.

[0012]

According to the present invention, by adopting poly-4-methylpentene-1 resin as the material for the bag-shaped container, it has sufficient heat resistance to store the filler in the high heat state. By forming the opening so that it can be sealed, it is possible to cool the high heat melt filling with water in a short time.
Moreover, it is possible to provide a bag-shaped container that can discharge the cooled filler without adhering to the inner surface. This container is
Since it is not bulky even after disposal after use, and does not contain harmful components, it does not generate toxic gas even when incinerated, and is excellent in terms of environmental hygiene.

[0013]

EXAMPLES The present invention will be described below based on examples. < Example 1 > Poly-4-methylpentene-1 resin [TPX RD18 manufactured by Mitsui Petrochemical, melting point 240 ° C, MFR
23 (230 ° C., 5 Kg)] as a raw material, and a film having a thickness of 40 μm formed by an inflation method is used as a silicone release agent as SD72 manufactured by Toray Dow Corning.
After applying 23, heat seal one end of the film to 2
A 0 × 50 cm bag-shaped container was prepared. In this bag-shaped container,
Using SIS (styrene-isoprene thermoplastic elastomer) having residual unsaturated groups as a base polymer, 2 Kg of a hot melt compound in a molten state at 200 ° C composed of a rosin derivative and polybutene was filled, and the mouth was opened. Sealed with a metal clip. 20 filling containers
It was cooled to 40 ° C. in 60 minutes by pouring it into the water at 0 ° C. The cooled and solidified contents could be easily taken out without adhering to the container.

< Example 2 > Poly-4 methylpentene-1
Resin [Mitsui Petrochemical TPX MX002, melting point 235
℃, MFR22 (230 ℃, 5Kg)] as a raw material
YSR30 manufactured by Toshiba Silicone Co., Ltd. is used as a silicone release agent on a 30 μm-thick film formed by a die extrusion method.
After 22 was applied, one end of the film was sealed by fusion and heat insulation to form a 20 × 50 cm bag-shaped container. Saturated SEBS base polymer in the bag-like container, as tackifier, C ₅ petroleum resins, hot melt compound that is composed of wax 1Kg packed in the bag-like container in a molten state of 180 ° C., the metal mouth portion Sealed with a clip. 6 by sprinkling water at 20 ° C in the filled container
After cooling and solidifying to 50 ° C. in 0 minutes, the filling could be easily taken out without adhering to the container.

<Comparative Example> In Example 1, what was filled in a molten state at 200 ° C. and allowed to cool in air at 20 ° C. took 12 hours to cool to 40 ° C. Therefore, the hot melt compound of the content was observed to be colored and the hue was changed.

Claims (1)

[Claims] 1. A bag-shaped container composed of a sheet or film molded from poly-4-methylpentene-1, which has a silicone treatment on its inner surface and a mouth for filling contents is hermetically sealed. A bag-shaped container characterized by being formed so as to be possible.