JPS6335499B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a method for degassing packaging products. During the degassing packaging process, place the product between the lower packaging film and the upper airtight thermoplastic film on the suction table,
A closed space is formed between the suction table and the upper airtight thermoplastic film. Thereafter, heat is transferred to the lower packaging film and the upper airtight thermoplastic film by an infrared heating element provided above, and the sealed space around the product is evacuated by the vacuum of the suction table.

[Conventional technology]

Many types of products are packaged in a way that removes air between the product and the packaging material during the packaging process to extend the product's shelf life and maintain its original quality and other characteristics that are important to the consumer. method is known.

Many of the above methods satisfy the requirements.

A packaging method is also known in which the product is placed in a shrink film bag made of synthetic resin during the packaging process to evacuate the space between the product and the packaging material. When the bag is soaked in hot water, the film-like bag shrinks along the surface of the product. During this contraction, the bag expels air around the product and the packaging material conforms to the shape of the product. The above is known for packaging slaughtered and butchered poultry.

Also, methods of packaging various products using vacuum packaging machines are widely used. A product packed in a synthetic resin bag is placed in a vacuum chamber, and the air inside the bag is expelled by vacuum.

A similar packaging method based on the suction method was patented in West Germany.
DS-PS No. 2412948 and British Patent GB-PS No.
It is disclosed in No. 1422375. When using the above method in which the surface of the suction table is a non-uniform wavy surface, it is ensured that the two films do not close together during the contacting process unless air is forced out through the openings in the non-uniform surface of the suction table. It's clear.

[Problem to be solved by the invention]

A common disadvantage of both of the above-mentioned methods is that the packaging process is only accomplished through several technical steps and that the packaging remains imprinted with air channels.

A similar solution is provided by the Hungarian patent known under the trademark DIPACK method. In this method, air is expelled from a sealed space between two airtight films by a parabolic effect generated within the sealed space.

The present invention reduces the above-mentioned drawbacks and also provides an ingenious method of degassing packaging of products, which is much more efficient than conventional methods.

The object of the present invention is to provide a method for degassing packaging of various products, in which a packaging film is sucked onto the product during the process, and air is expelled from around the product or the space between the product and the film is filled with protective gas. That's true. In this way continuous packaging of products of various shapes and sizes is obtained.

[Means to solve the problem]

According to the present invention, the above object is achieved by inserting a thermoplastic suction pipe between the product and the suction table, degassing through the suction pipe and sealing the suction pipe with an upper airtight thermoplastic film and a lower packaging film by heating. This is achieved by welding to.

In a preferred embodiment of the invention, the product and the space around it are filled with a protective gas.

In another preferred embodiment, a guard is inserted between the infrared heating element and the upper airtight thermoplastic film to protect the product.

〔Example〕

The method of the invention will now be explained by way of a practical example of operation with reference to the accompanying drawings.

[Effect]

The product is placed between the upper airtight thermoplastic film and the lower packaging film, and a thermoplastic suction pipe is disposed between the product and the suction table. When a vacuum is applied by the suction table, the air around the product is sucked in through the suction pipe, but since the upper film is airtight, it is sufficiently sucked in, resulting in beautiful deaerated packaging.
At the same time, the suction pipe is softened by the heating effect of infrared rays and is integrally and permanently welded to the upper and lower films, so that no trace of an air channel remains as in the conventional case. In this way, the technical problem of the present invention is solved.

In carrying out the method of the invention, first the product 3 to be packaged is placed on the lower packaging film 1, as shown in FIG. This film is on suction table 7
arranged above. Between the product 3 and the edge of the suction table 7 there is a thermoplastic material so as to form an air channel between the product and the edge of the suction table, in other words between the product and the suction port. Place the suction tube 4 on the lower packaging film 1. The airtight thermoplastic film 2 is mounted on the suction table via the clamping frame 8. This film forms the upper packaging film. A sealed space is formed between the suction table 7 and the upper film 2. The upper film 2 is lightened by the infrared heating element used in this embodiment, and the air in the closed space below the upper film is heated through the upper film 2. The heated air lifts the upper film into a conical shape. After a suitable time has elapsed, air is sucked out from the closed space via the suction table 7 and the suction port 6 of the suction table. As a result, the upper film 2 confines the product 3 and the lower film 1
permanently adhered to. At the same time, air is sucked out from the product through the suction pipe 4. Alternatively, the product is optionally filled with protective gas after drawing out the air. Thermal softening time depends on the material, color and diameter of the suction pipe and wall thickness. Since atmospheric pressure is applied in addition to the vacuum below the upper film 2, the upper film 2 is pressed onto the lower film 1. In this way, a package consisting of the upper film 2, the suction tube 4 and the lower film 1 is obtained. After cooling, the sealed state becomes permanent.

As shown in FIG. 2, in the package formed as described above, the product 3 is hermetically wrapped by the upper film 2 and the lower film 1, and the suction pipe 4 is wrapped by the upper film 2 and the lower film 1. 1, but as shown in the figure, it remains in a sheath-like shape between the two films.

If the product 3 is sensitive to the heat between the downward heating element 5 and the upper film, a protector 11 corresponding to the shape of the product is inserted to protect the product. In this way, the product is not damaged during heat transfer, ie during packaging, and the quality of the product is not disadvantageously compromised.

During the packaging process, the product 3 is enclosed by the upper film 2 and the lower film 1, and the protective gas is removed by sucking air out of the product 3 through the suction pipe 4 or by reversely operating the valve 10 after sucking out the air. Can be filled. In this way, in one operating step, an aesthetically pleasing and mechanically robust disposable degassing packaging or protective gas filling is achieved with the degassing packaging method of the invention.

In the food industry, degassing packaging and protective gas filling provide economical packaging of cheese, fish, meat, sausages, etc.

In order to facilitate understanding of the present invention, several examples of packaging configurations are given below.

〔Illustration〕

1 Item to be packaged: Latch Packaging material: The upper packaging film is a rigid ONGROPIL KTT (product name) type that is transparent like water.
It is made of PVC and has a thickness of 0.2mm. The lower packaging film is made of ONGROFOL LFT type soft PVC in brick red color.
The thickness is 0.12mm. The suction pipe is blue and hard.
It is made of PVC and has an outer diameter of 3.2 mm and a wall thickness of 0.2 mm. The heating temperature of the upper packaging film is up to about 85°C, the holding time of the frame is 6 seconds, the time of applying vacuum is 8 seconds, and the required vacuum is 20 mbar.

The package obtained above: the latch is permanently sealed by the packaging film described above, and the air around the latch is sucked out with a vacuum pump. In this way, an aesthetically pleasing disposable package was obtained.
The product is easily visible through the film and is protected against corrosion.

2. Packaged object: A conical aromatic candy with a hard shell containing rasp berries.

Packaging material: The upper packaging film is BIAFOL (trade name) type soft PVD.C that is transparent like water and has a thickness of 0.15mm. The film is printed in four colors. The lower wrapping film is the same as the upper wrapping film. The suction pipe is made of white hard PVC and has an outer diameter of 4.
mm, wall thickness 2 mm. The temperature of the top film during packaging is 90°C, the holding time of the frame is 5 seconds, the time of applying the vacuum is 7 seconds, and the required vacuum is 15 mbar.

The package obtained as described above: A package with a good appearance and a high aroma is obtained, and the product is kept in a fresh state.

3 Packaged object: Ultra-small electronic storage unit Packaging material: Upper packaging film is DUROVINIL (product name) type rigid PVC that is transparent like water, lower packaging film is as bright as water.
DUROVINIL VI (trade name) type hard PVC with a thickness of 0.15mm. The suction pipe is made of black rigid PVC with an outer diameter of 4 mm and a wall thickness of 0.25 mm. Frame holding time is 6
seconds, the time to apply the vacuum is 8 seconds, the required vacuum is
10mbar.

The package obtained above is a vacuum-processed package, protected from corrosion and mechanical influences, transparent so that it can be seen from all sides, and accessible for measurement and easy to connect.

4 Packaged item: Disposable medical syringe Packaging material: The upper packaging film is BIAFOL type hard polyethylene coated with water-transparent PVdc and has a thickness of 0.15 mm. The lower wrapping film is the same as the upper wrapping film. The suction pipe is made of white rigid PVC with an outer diameter of 3.2 mm and a wall thickness of 0.3 mm. The packaging temperature of the upper packaging film is 85°C when the protective material is used. The frame holding time is 6 seconds, the vacuum application time is 8 seconds, and the protective gas filling time is 2 seconds.
seconds, the required vacuum is 15mbar.

The package obtained above is a sterile disposable package with protective gas.

The main advantage of the method of the invention is that the original quality of the product can be maintained without special protective measures,
Therefore it is flexible. Simple and economical packaging can be carried out by conventional vacuum forming machines. Since untreated film can be used as packaging material, product types and dimensions can be changed continuously without modifying the machinery. In the case of food products, the shelf life can be extended by using the method of the invention. It also provides simple and sterile packaging for medical equipment and instruments. Using the method of the invention, aesthetic packaging is obtained, which increases the value of the product and widens its range of applications.

The present invention is important in the field of microelectronic components. It is known that microelectronic components are susceptible to oxidation in air. Microelectronic components are extremely sensitive to dust and dirt, and their extremely thin elements can be damaged by external factors. In the field of microelectronics, the invention is not only well suited for transport packaging, but is also extremely economical and productive in the field of packaging technology, and is also extremely safe in operation.

Traditional packaging methods for microelectronic components involve pressing in a vacuum chamber, heating in a furnace, and use extremely expensive materials. Also, the percentage of defective products is extremely high.

Using the method of the invention, protection and packaging can be achieved in one step instead of several steps, and less expensive untreated materials can be used.

In the therapeutic field, sterile products such as disposable needles and disposable needles used for surgical threads can be packaged in an economical and simple manner compared to conventional methods. These products are packaged in protective paper and sterilized for a long period of time (several hours) in a chamber filled with ABS gas. ABS gas enters the area around the product through the protective paper and sterilizes it. The disadvantage of this process is that the protective paper is expensive and thin, easily damaged, and therefore takes a long time to process.

As mentioned above in the practical example, it is necessary to maintain sterile conditions between the two films, and this requires the so-called DIPACK, which is filled with protective gas via the suction pipe.
This is accomplished by a method.

〔Effect of the invention〕

For deaeration packaging, a thermoplastic suction pipe was placed between the product and the suction table, which was placed between the upper airtight thermoplastic film and the lower packaging film, to perform the vacuum and heating action, making it more efficient than conventional packaging. In addition to complete deaeration by vacuum, the product can be protected from impact by the suction pipe that remains between the upper and lower films after the action is completed, and the suction pipe is completely welded between the upper and lower films. A beautiful package is obtained and no unsightly air channel marks are left on the package as in the past. Furthermore, the above-mentioned packaging can be achieved by simply arranging a suction pipe, and does not require complicated steps as in the past. Furthermore, since the film used may be an untreated ordinary film, material costs can be reduced significantly.

[Brief explanation of the drawing]

FIG. 1 is a side view showing the components of an apparatus used to carry out the method of the present invention, and FIG. 2 is a plan view showing a package made by the method of the present invention. DESCRIPTION OF SYMBOLS 1...Lower packaging film, 2...Upper airtight thermoplastic film, 3...Product, 4...Thermoplastic suction pipe, 5...
Infrared heating element, 7... Suction table, 8... Tightening frame,
11...Protective object.

Claims (1)

[Claims] 1. Place the product between the lower packaging film and the upper airtight thermoplastic film arranged on the suction table, place the frame on the upper airtight thermoplastic film, and then place the product between the suction table and the upper airtight thermoplastic film. After forming a sealed space between them and arranging them as above, the lower packaging film and the upper airtight thermoplastic film are heated by an appropriate infrared heating element, and then the air around the product is degassed by the vacuum of the suction table. In a degassing packaging method for a product, a thermoplastic suction pipe is inserted between an upper airtight thermoplastic film and a lower packaging film, and the thermoplastic suction pipe is extended between the product and a suction table to provide suction action. A method for degassing packaging various products, characterized in that at the end of the process, an upper airtight thermoplastic film, a lower packaging film, and a thermoplastic suction pipe are integrally welded to obtain a degassing package. 2. The method according to claim 1, wherein the product and the space surrounding the product are filled with protective gas through the suction pipe. 3. The method according to claim 1 or 2, wherein a protective material is inserted between the infrared heating element and the upper airtight thermoplastic film to protect the product from heat.