JPS63501556A - Multi-composite foil material for packaging applications, especially vacuum packaging applications, and method for applying the same as packaging bags - 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] Multi-composite foil material for packaging applications, especially vacuum bag applications, and its packaging bags. The present invention provides a method for preparing, for example, powdered food by applying a vacuum process to maintain gas. Multi-composite foil materials used specifically for additive and non-additive packaging ple compound foil material) . Packaging of composite foil materials has been known for some time for the aforementioned applications. packaging bag being emptied Although the packaging bag is not clean, there is a packaging outer bag or box. are always required to be neatly vacuum packed for sale. In addition, outside The side bag (outer bag) is relative to the inner bag (inner bag). Prevent the opening of holes (perforations) in the inner bag where holes easily occur, i.e. on rough areas. should be prevented as much as possible in areas with sharp edges. Unwanted, wanted evacuated pac for hole penetrations that cannot be The larger the granular or powdery component, the sharper the edges. deer Perforations, such as perforations due to impact shock, are also initiated from the outside of the bag.

The present invention provides all desired properties such as optimum strength, impermeability to gases and liquids and to light. It provides a new multi-composite foil material that has Yes, but in addition to this property, the new composite foil also has surprising properties that have never existed before. has.

According to the present invention, puff cage applications, particularly oxygen-sensitive or reactive The airtight multi-composite foil material is suitable for backing foods under vacuum pressure. Separate airtight, placed inside a separate outer layer with high tensile strength and mechanical properties It has its own inner layer with a vacuum puncture layer and several layers are made of thermoplastic foil material. one layer is made of the substrate material, and each of these layers is arranged in a multilayer configuration and mutually one layer of thermoplastic foil material is laminated and arranged in laminate form; During the manufacturing process of multi-composite foil materials, simply by applying adhesive to each It is characterized by the provision of non-permanent adhesion between each layer.

The invention also relates to packaging bags made of composite foil material, looks clean from the outside but is ruffled on the inside, tearing or opening the outer bang It looks like a normal vacuum bag (the inside is not clean).

Moreover, the properties of the individual layers of the composite foil material work together with the optimal strength of the inner layer of the bag. When the optimum strength of the outer layer is reached, undesirable perforation occurs. Even if it happens by chance, perforate (perforate) only the outer bag, and at the same time It can be determined to ensure that the inner bag is not perforated and therefore Effective storage is always ensured even if the inner bag is emptied. This new Standard multi-composite foil materials are used in more expensive tin cans, especially as backing for milk powder. suitable for replacing.

Moreover, the packaging bag of the invention is an emptied bag that saves the shape of the blocks of the bank being emptied. In fact, for example, a small package of 200 gr was made possible, but For example, it can be made into a large buff cage of 250 to 2,000 gr. Multicomposite foil of the present invention The materials have already been prepared for the experiment, and a small bag was run over by the trunk, but how There was no danger of perforation (punching, punching).

The packaging bag according to the present invention is called an outer pancage bag or bonx. This has given rise to an extra use of objects.

The present invention usually has a pleated appearance when emptied and already has the desired pattern. A smooth and clean stamped outer bag and an integrated inner packaging bag (inner p ackaging bag).

This new packaging bag is a storage bag for milk powder that can be easily emptied back into its original position when used. is particularly appropriate for

Usually milk powder is stored in a box under low vacuum pressure, and this milk Powder has a shelf life limit.

Novel high-tightness and high-tack multi-composite foil material without any quality damage The warranty period is short (at least 2 years), allowing milk powder to be stored for consumption.

Primarily, this also ensures the storage of milk powder outside the refrigerator in tropical countries. .

Additionally, the present invention takes advantage of the special properties of multi-composite foil materials. Yo Specifically, the pleated, open inner bag has a smooth exterior throughout. Separate from side bag. The latter (outer bag) cannot be used with normal vacuum packaging. It is possible to provide an advertising seal that is easy to read.

The invention is illustrated in two embodiments of multicomposite foil materials.

FIG. 1 shows a first composite foil material of the invention consisting of five layers; FIG. Figure 3 shows a multi-composite foil material in layers, each shown in an exploded view.

The multilayer highly adhesive and airtight vacuum packaging foil material shown in the figure is It comprises a first outer layer or foil 1 of thermoplastic material located in mating position. This layer is Can be made of uniaxial or biaxial foil of polyamide (nylon) or other suitable material. come.

Layer 3 is firmly attached to a suitable material, for example an aluminum foil layer. next layer 4 may again be made of uniaxial or biaxial foil of polyamide (nylon) or other suitable material. stomach.

The final composite layer 5 consists of polyethylene and/or co-extruded polyethylene and/or co-extruded layers, each aligned and co-extruded. Polymers and/or alkenes and/or extrudable ionomers consisting of several layers be. All layers are laminated together and as such constitute the outer composite part. In line co-extruded low-density polyethylene and/or copolymers and/or alkenes. formed from extrudable ionomers each consisting of and/or several layers The inner layer 6 is fixed onto this composite part by means of an adhesive. Therefore this outer complex A loose bond is established between the portions 1-5 and the inner layer 6, and the inner layer 6 is a foil oblique cylinder. It is strong enough to warrant processing into conventional cylinder forming and filling machines.

Due to the basis of the composition of metal layer 3 and layer 5, the outer composite part itself is already of great importance. characteristics, i.e. this part of the packaging material contains 0.3 or less oxygen or It shows the permeability to other gases, and the cough value is measured at normal pressure and 24°C over 24 hours. It has impermeability to gas as shown in the display value of crA/m.

The inner layer is such that this part of the packaging material has a resistance to oxygen or other gases of 0.5 or less. It has a similar impermeability to gases as it exhibits permeability at values.

The materials for the outer layers 1-5 are such that the packaging laminate has good rigidity, flexibility and good gas impermeability. from the point of view that the safety should be guaranteed in case of any damage to the inner packaging N6. selected, and the inner layer also exhibits excellent impermeability to gases, allowing them to escape from the outside to the inside. Always provide complete product protection and complete packaging in case of partial damage that occurs. It maintains the vacuum pressure in the installed configuration and therefore remains ready for use.

The thickness of inner N5 and N6 can be changed arbitrarily, but the preferred thickness of these 2N5.6 is The desired thickness is 0.0375 to 0.00400x* for small packages, and A range of 0.0352 to 0.0375 usually provides the desired quality in a small packaging bag. Perfect for getting.

The multilayer packaging foil material is preferably applied to the container or pancage by conventional means. Containers that can be hermetically sealed when emptied with or without additional supporting gas Or processed into pancakes.

For example, packaging foil materials can be formed into conventional open-ended tubes or bags, filled and secured. It can be used to manufacture defined bags or sachets, and the packaging foil material is suitable for its contents. For example, after being filled with milk powder, it is transferred to a vacuum machine and shaped, and then molded as desired. The gas is placed within the packaging material and sealed with heat.

As a result, pressure is balanced between the loosely bonded layers 5 and 6, and the inner layer 6 and then subject to normal air pressure as the final sealing of layers 1-5 to layer 6 occurs. It will be done.

By this process, both the packaging inner bag contained within the packaging outer bag are The entire packaging is extremely airtight, eliminating the need for additional wrapping in paper or cardboard. Made with sea urchin.

The inner layer made of substrate material (aluminum foil) is stretched and thermoplastic The outer layer made of foil material is therefore closely bonded, and the inner layer is bonded to the outer layer. It is not bonded to the mating part, it is simply glued together with adhesive, and therefore it is not supported. The desired rupture by separation of the foil occurs easily after it has been emptied.

A predetermined adhesive is used and the adhesive is later separated and locally subjected to tension and pressure. The internal and external bags are separated as soon as a difference occurs, respectively. Therefore, no further explanation regarding the application of the process is necessary.

Those skilled in the art of packaging have long been familiar with vacuum processing on tubular bags; No further explanation is necessary.

In the present invention, "internal" rupture (separation) is expressed in terms of itself, and "sticking" is It is cited because it includes many possibilities, and its products are therefore open-ended. As a result, various Adhesion can be achieved by any adhesive or mechanical means; merely provides the necessary potency to enable the desired separation (rupture) characteristics.

international search report ANNEX To π5 INTERNATIONAL 5EARCHRE? OR T ON

Claims (6)

[Claims] 1. The inner layer, which includes one independent airtight vacuum packaging layer, has airtightness, light-shielding, and Particularly for packaging placed inside one outer layer with high tensile strength and mechanical properties. Foods that are sensitive or reactive to oxygen, and such food products, may be processed under vacuum pressure. air-tight multi-composite foil material for packaging in which several layers are made of thermoplastic foil material. one layer consists of a substrate material, the several layers are arranged in laminate form and laminated together. and also one layer of thermoplastic material is arranged in laminate form and a multi-composite During the manufacturing process of the foil material, the bond between the two layers can only be created by applying adhesive and adhesive means. A multicomposite foil material characterized in that permanent adhesion is achieved. 2. For use of composite foil material as packaging bag, the inside of packaging foil material (inner bag) The majority of packaging (packing) occurs due to unevenness in the material being packaged as a result of the applied vacuum pressure. However, The irregularities formed on the inner surface of the foil material do not appear on the outer surface of the multi-composite foil material. The outside of the packaging foil material (outer bag) is removed during or after the packaging process. The packaging material according to claim 1, characterized in that it is partially separated from the inner part. Composite foil material. 3. From the beginning, the inner bag is connected to the outer bag until the packaging material is subjected to vacuum pressure. It remains stuck together and this sticking is due to the pressure difference between the inner bag and the outer bag. Claims characterized in that the force is locally separated after it is created due to the difference. Packaging bags manufactured for the multicomposite foil material of either clause 1 or 2. 4. As a result of normal vacuum pressure, the inner bag folds as it wraps its contents. The outer bag is brought together as normal and the inner bag is smooth and clean, thus The packaging according to claim 3, characterized in that it is wrapped by forming a conspicuous outer packaging bag. bag. 5. A non-permanent film initially set between two superimposed foil layers placed on top of each other. By means of permanent bonding, this bonding is created within the composite foil material in the usual way, but However, the formed adhesions are particularly important afterward and during the pressure equilibrium taking place. While the internal pressure is equalized between the foil layers involved when used as a force packaging bag, The adhesive initially appearing between these two superimposed layers is allowed to break up. and, as a natural result, these layers have specific properties that make them easy to separate. A claim used for a packaging bag according to claims 3 and 4, characterized in that: A method for producing a multi-composite foil material according to scope 1 or 2. 6. The inside of the packaging bag is subjected to compression as a result of packaging pressure (vacuum pressure) After that, the outside of the packaging bag (outer packaging bag) gradually separates from the inside of the bag. Therefore, as a result, the outer packaging bag is usually An outer surface produced on which a notice and/or other stamp may be affixed and a print may be placed thereon. From claim 1, wherein the side bag is relatively smooth and clean. Opening of the cylindrical packaging bag under the application of the multi-composite foil material according to any one of items up to item 5 how to.