JPS5974078A - Vessel - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to containers. More specifically, a sheet of base soil coated with a coating agent that becomes sticky when heated above a certain vorticity (hereinafter referred to as a heat-adhesive coating agent) is used as the lid side of a cup-shaped molded product. The present invention relates to a container in which the coated surface of the sheet is brought into contact with the edge of a cup, and only the edge of the cup is heat-pressed to seal the cup.

Conventionally, containers for food or other uses have been made by sealing four phases in a cup-shaped molded product, or by forming a thermoformable sheet by vacuum forming or pressure forming, and sealing it with a mount. So-called blister-back containers are often used. In this case, a sealant is laminated on the surface of the lid or mount that seals with the cup-shaped molded product, etc., and in many cases, this sealant is polyethylene-based, polypropylene-based, polynisder-based, ethylene-vinyl acetate copolymer-based, Composition consisting of vinyl chloride-vinyl acetate copolymer system * 'C, i, S, Has heat-sealing properties, but after being peeled off during use, it cannot be resealed, and the lid material or mount must be resealed. It is unsuitable if there is a polishing device that seals and preserves the contents.

On the other hand, as a method to make the container resealable, there is also a method of applying an adhesive coating agent (adhesive) to the lid material or mount and sealing the adhesive surface by V-shaped. (The adhesive is applied to the entire surface of the backing paper) and its adhesiveness makes it difficult to handle, poor workability during sealing work, and moreover, the adhesive is applied directly to the contents other than the sealing part of the lid material. There is also the problem that the contents are sticky and the contents tend to stick to the lid or mount, making it difficult to remove them.

One possible solution to this problem is to apply adhesive only to the sealing part of the lid material or mount. A7
．． Although it is possible to prevent the adhesive from sticking to the backing paper, there has been no improvement in the difficulty of handling the sticky adhesive even before the sealing process.

The present inventors took into consideration the above-mentioned circumstances, and conducted various studies on methods to provide ease of handling, impart adhesiveness only to the sealed portion, and provide resealability. We focused on the fact that the sticky, heat-adhesive coating agent has the property of not being sticky when simply applied, but becomes sticky when heated, and after applying it to a base material, it is molded into a cup shape. If you overlap the edges of objects, etc. and heat and press the edges where they come into contact to seal, the lid material or mount will not have any adhesiveness before the sealing process, making it easy to handle. They discovered that it is easy to seal, that only the sole part that comes into contact with the cup-shaped molded product exhibits tackiness after sealing, and that it is possible to reseal even after peeling off, thus completing the present invention. .

Below, the configuration and manufacturing method of the container of the present invention will be explained in detail with reference to the drawings.

As shown in FIG. 1, the container of the present invention is provided with a layer (2) of a heat-adhesive coating agent on a layer phase (1), which is stacked on a cup-shaped molded article (3). It consists of a hermetically sealed structure by thermocompression bonding and sealing at the edges.

The base material in (1) is one that does not pose any problem on which a layer of heat-adhesive coating material is applied, and has sufficient mechanical strength to be used as a container lid or mount. For example, any of paper, plastic film, cloth, nonwoven fabric, metal foil, or a laminated composite thereof may be used.

(2) The heat-adhesive coating layer is made of fine particles of rubber-based, Nisder acrylate-based, methacrylic ester-based, or silicone-based adhesive such as paraffin wax, polyethylene Fuchs, petroleum wax, etc. This layer is coated with a substance that melts when heated at a relatively low temperature and is coated without microcapsules. These microcapsules do not exhibit tackiness at room temperature because the adhesive particles are completely covered with the wax-based coating, but when heated above a certain temperature, the wax-based coating It has the property of exhibiting tackiness when it melts and the adhesive appears on the surface.

(The coating liquid of the heat-adhesive coating agent forming 21 layers is usually in the form of a dispersion in which the above-mentioned heat-adhesive microcapsules are dispersed in water or other solvent.) This coating agent is a liquid in the layer phase (1).
As a method for coating on the surface, commonly used coating methods such as gravure coating, air knife coating, roll cop ink, reverse roll coating, and blade coating can be applied. These coating methods: After applying the heat-adhesive coating agent, the dispersion medium such as water or solvent is removed using hot air, etc., and the coated surface is dried to form the layer (2). As for the conditions, avoid adding too much 〃1 so that the coating material of the microcapsules does not melt and the coated surface becomes sticky, and adjust the temperature, air volume, and line so that the coated surface is sufficiently dried. It is desirable to set the speed etc. appropriately.

Regarding the amount of heat-adhesive coating agent applied, there is a correlation between temperature and temperature, which means that the larger the amount applied, the stronger the adhesive strength after heat-pressing. It has an adhesive strength that does not easily peel off even when external forces such as impacts are applied5, and the adhesive strength must not be so great that it will cause damage to the base material when peeled off during use. Preferably, the amount of application should be appropriately set in consideration of conditions such as the size and shape of the container, the area and shape of the sealed portion, the type and weight of the contents, and the usage status of the container.

As the cup-shaped molded product (3), ff! polyvinyl chloride, polystyrene, styrene-butadiene copolymer,
A sheet of thermoplastic plastic such as acrylonitrile-styrene copolymer, acrylonitrile-butadiene-styrene copolymer, polycarbonate, etc., molded by vacuum forming method, pressure forming force method, etc., or polyethylene, polypropylene, hard eta-polymer, etc. Thermoplastic plastics such as durable vinyl and polystyrene, thermosetting plastics such as phenolic resins and modified urethane resins are molded by injection molding, metal cup-shaped molded products, or paper molded products. A cup or the like may be applied.

The method for sealing the cup-shaped molded product (3) with a layer (2) of a heat-adhesive coating agent on the layer phase (I) is as follows:
A suitable method is to overlap the sheet 1 so that the surface (2) of the sheet 1- and the edge of the cup-shaped molded material face each other, and to seal by pressing only the edge portion where the two contact each other. That is, By heating, the wax-based material of the conjugate in the microcapsules in the layer (2) melts and adhesive particles appear on the surface, so the surface (2) of the sheet becomes sticky and is pressed at the same time. The seal is pasted to the edge of the cup-shaped molded product to complete the sealing process.The device used here is a conventional filling and sealing machine for cup-shaped containers. In this case, before the sealing process, the sheet is sticky and easy to handle, and even after sealing, the parts of the lidding material sheet other than the sealed part are not sticky, so the contents will stick to the lid. No problems occur, and even after the lid has been peeled off, it is still sticky and can be resealed to seal the container.

Above, we explained a method for manufacturing a resealable container by applying a heat-adhesive coating agent to a base material and heat-pressing sealing it with a cup-shaped molded product. I will explain about it.

The container of the present invention is used as an optimal container when it is necessary to reseal and store the container each time the contents are put in and taken out. For example, if the contents are foods that contain a relatively large amount of water and whose quality deteriorates when water is lost, the container is opened, a portion of the contents are taken out, and the remaining contents are stored again. If the container of the present invention is used, the container of the present invention can be resealed, so the remaining contents of the food can be kept moist and stored again without degrading the quality. You can do it.

1. 2. Even when the contents are parts that are prone to rust due to moisture in the air, such as iron bolts, nuts, nails, etc., if the container of the present invention is used, the desiccant will not be removed even after opening the container. By placing the container on the same side and resealing it, it is possible to remove the moisture in the container and store the contents again without rusting.

Furthermore, since the parts other than the sealing part of the lid do not have adhesive properties, there is also the advantage that the parts of the contents do not stick to the lid and become difficult to take out.

As described in detail above, the container of the present invention can be easily manufactured by combining the conventional sheet coating technology and the container filling and sealing technology, and is also easy to handle during sealing work. And, moreover, it was opened,
It has many advantages over conventional products, such as being able to be sealed repeatedly, which contributes to improving the shelf life of the contents after opening, and also making it easy to remove the contents from the container without any problems. Therefore, it can be applied to a wide range of uses.

Examples of the present invention will be described below.

(Example) Olivine BPW450, a dispersion-like heat-adhesive coating agent (also referred to as delayed tank adhesive 1) in which heat-adhesive microcapsules are dispersed in water.
0-8 (Toyo Morton undiluted solution (solid content concentration 50%)
As is, with a gravure engraving plate with a line count of 75p/1n and a plate depth of 165μ, high quality paper 64M/m2 and aluminum 7I! 3
15μ was applied to the aluminum foil side of the bonded base materials by dry lamination, the water was evaporated with hot air in an oven, and the coated surface was dried. However, the drying conditions at this time were a temperature of 55°C and a line speed of 10 m7', the coated surface was sticky, and the coating amount was 14.
It was 3.9/i. This sheet was cut out into a circle with a diameter of 90+II m.

On the other hand, hard polyvinyl chloride sheet, SUMILITE VSS-
1308 (thickness 500μ, manufactured by Sumitomo Bakelite) by vacuum forming method, inner diameter 80mm, depth 50mm,
A cylindrical cup with an edge width of 5 nrrn was prepared. After filling the cup with Castella 100I, the circular sheet is placed so that the coated side faces the edge of the cup,
Place the cup so that it does not protrude beyond the edge, and heat both at the edge of the cup at a temperature of 140℃ and a pressure of 2.8 kg/cu.
It was heat-pressed and sealed under the conditions of t. After heat and pressure bonding, the edges of the sheet and cup are adhered, and the seal strength is 1500.
Showing the 7/15 deal, pu, 2.

In addition, as a comparative example, the same amount of ethylene-vinyl acetate copolymer heat sealant was applied to the same high-quality paper/aluminum foil base, the same content was filled into the same cup, and the same method was applied. It was then heat-pressed and sealed.

These two types of containers were opened. In the case of the container according to the example of the present invention, even after opening, the circular sheet of the lid still had adhesiveness at the sealing part, and the sheet was again pressed by hand to adhere to the edge of the cup and sealed again. On the other hand, the container of the comparative example could not be resealed after being opened and was left unsealed.

Table 1 summarizes the condition of the castella contents and the condition of both containers two days after opening the container.

Table 1 Condition of castella after 2 days and condition of container When the container of the present invention is used in this way, it is possible to reseal it after opening, and even after resealing, it maintains sufficient sealing strength. However, the contents do not fall onto the lidding sheet, preventing the contents from dispersing into water, and is effective in preserving the product.

[Brief explanation of the drawing]

The drawings show embodiments of the invention, and FIG. 1 is a sectional view of a container of the invention. (11 base phase (2+ Layer of heat-adhesive coating agent (2+-1 Adhesive portion of layer of heat-adhesive coating agent (21-27/°C portion without tackiness [31 Cup-shaped Molded product patent applicant Toppan Printing Co., Ltd. Representative Aio Suzuki 6 Figure 1

Claims (1)

[Claims] Sheets made of plastic and metal are coated with a heat-adhesive coating agent (derate-tack adhesive) that exhibits tackiness when heated above a certain temperature. Alternatively, a cup-shaped molded product made of paper or the like is fixed in such a manner that the coating m1 of C) and the edge of the cup face each other, and the two are heat-pressed at the edge of the cup where they are in contact. By doing so, a sheet is attached to the edge of the cup and the cup is sealed, which is a sign of IPJ.