JPS60110612A - Adhesion shrink packaging method - 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 /2/ This invention relates to a method of packaging divine-shaped articles using both absorption and shrinkage.

One type of packaging for articles is suction-tight packaging, in which the article is placed between two thermoplastic films and the article is covered by suction on the lower film and seals on the upper and lower films.

This packaging method requires the previous year, can be packaged in any shape, does not require any special packaging techniques, is inexpensive, and can be packaged each time at a store, so its use is limited. It is expanding rapidly4).

However, since this packaging method involves pressing the heated lower film onto the lower film, the seal is weaker than when using adhesive, melting, or blinding. Even if an extra margin is provided, there is a drawback that the sole may open during handling of the packaged article. For this reason, it was considered unsuitable for packaging not only heavy items but also foodstuffs that leaked oil, and was used exclusively for packaging small and light items.

Furthermore, this packaging method has problems such as the appearance of some products being spoiled and the appearance of the product being poor because an extra sealing margin is provided to prevent tampering.

Therefore, an object of the present invention is to eliminate the above-mentioned drawbacks of the conventional suction tight packaging by utilizing the shrinkage of the film, and to ensure that the seal is strong and does not need to be sealed even when the suction tight packaging is applied. Furthermore, it is an object of the present invention to provide a new packaging method capable of dealing with the blemishes that tend to occur when an article having four sides is packaged.

'I!' of this invention for the above purpose! The J' characteristic is achieved by placing the article between heat 1'' J-shishi L films and applying pressure or suction to the lower film side while the upper film is heated to closely cover the article in -1-, and The film is sealed around the article, the sealed portion is torn off to form a package of upper and lower films, and the package is then heated to shrink the excess portion of the film.

What about the upper and lower films used in this invention? Liethylene, polynolopyrene, issue? Riester, Σ) 5 l
) A film or sheet made of thermoplastic resin such as vinyl chloride. It can be used for a long time in the state of 1'L layer or multiple layers.3 Furthermore, the lower film may be a water-retained film, and in some cases, it is a composite film supplemented with paper material only in the part that contacts the article. It may also be a film. In addition, close-contact packaging is added to 11-. -1: Either can be used or in absorbent close-contact packaging.

The present invention will be explained in detail below according to the illustrated steps.

FIG. 1 shows a heating suction packaging machine, which has a conventional structure including a suction device 2 on the lower side and a heater 3 on the upper side.

First, the lower film 4 is placed on the suction device 2, and the article 5 is placed on the lower film 4. Furthermore, the article 5 is covered with a lower film 6 of the same quality as the lower film 4.

FIG. 2: After the upper and lower films 4, 6 are heated by the frame 7, the north film is heated by the heater 3, and the lower film 6 is moved to the lower film side by the suction device EL 2. Suction.

As a result, the upper film 6 is deformed into the shape of the article 5, comes into close contact with the surface of the article 5, and removes everything except the bottom surface. Further, the excess portion of the upper film 6 overlaps with the lower film 4 and comes into close contact with it.

3 and 4 Next, inside or outside the packaging machine, remove the excess portion 6a from 7-
Pressure is applied with a sear, and the soil 1: film 4, 6 is sealed around the article 5. After that, the /-ru portion 8 is cut leaving the required inside, and a package is formed using the upper and lower films 4, 6. 9
The 9-piece product 5 tightly wrapped in the package 9 is placed in a heat shrinking device 10, and the whole is heated for a short time. .

As a result of this heating, the seal portion 8 protruding around the article 5 and the excess portion of the film protruding as a bridge 11 from the side of the article, etc., are heated in the area of the article 5, as shown in FIG. shrink).

The heat-shrinked seal part as shown above! ] U, even if the seal is by pressure bonding, the hot part, 1'611
・The seal becomes difficult to peel off due to l, and the product 5.
The sealing effect becomes even better. Also, there is a seal around the item! Compared to the one with 1, the /-ru part is less than 1-1, which contributes to the beautiful appearance of the product.

In addition, even if the film that is in close contact with the article 5 is heated from the outside, most of the heat will be absorbed by the article if the heating time is short and will not be enough to cause the adhesive film to undergo heat shrinkage. is only the excess portion of the film away from the article 5, and as a result, in the case of an article with a complex surface shape, the adhesion is further increased and the packaging effect is enhanced.

As mentioned above, this invention has effects that cannot be obtained with conventional suction thickening packaging, and also allows films or sheets of synthetic (aJ resin) with thermoplasticity to be used as packaging material regardless of thickness. However, packaging can be easily done by simply adding a heat shrinking process to the conventional pressurized or suction-tight 7M1 packaging process, making it particularly complicated. It has the advantage of being able to package items that were considered difficult to package.

[Brief explanation of drawings]

The drawings show an embodiment of the tight shrink packaging method according to the present invention, shown in step 111. Figure 1 is a longitudinal cross-sectional view when it is set in a suction tight packaging machine, and Figure 2 is a diagram showing the case when it is in absorbent tight packaging. 3 is a vertical sectional view of the article when the package is molded, FIG. 4 is a plan view thereof, FIG. 5 is a vertical sectional view during heat shrinkage, and FIG. 6 is a vertical sectional view of the product when it is molded. It is a front view. ■ ・Suction tight packaging machine 4- ・Bottom film 5 ・Article 6..."Bottom film 8...Seal part 9...Packaging body Patent applicant: Kyowa Ijj Iso Co., Ltd. Sadaaki Honta 1st Figure 1 Figure 2 Figure 1-Figure 41zl Figure 6

Claims (1)

[Claims] The article is placed between thermoplastic films, and the upper film is heated and pressed against the lower film side.1. The fuo is suctioned to tightly cover the article, and the upper and lower films are sealed around the article, the sealed portion is cut to form a package with the upper and lower films, and then the package is heated. A VJ'i II shrink wrapping method characterized by shrinking the excess portion of the film.