DE2342483A1 - Insulating material production method - packing and intermediate cells sheets are joined to form laminated packing - Google Patents

Abstract

Insulating material is made by using plastics sheets in combination with e.g. metal foil or paper are joined together in three or more layers to form a final laminated packing sheet. In order to achieve the required insulation properties in each laminated sheet are included one or more intermediate sheets of net shaped material which in completed lamination are forming enclosed cells filled with air of equal or lower pressure than air pressure out side the lamination. The net layers are produced from adhesive material and in order to prevent formation of temperature bridge they are of different thickness and their cells are of different size and shape. The top or bottom layer of the lamination is from material penetrated by light or reflecting light.

Description

NECK AREA

Process for the production of heat-insulating packaging. & eη

The sina ^ rfindung relates to a method for the production of packaging wärmeisolierenüen η from Verbumpackstoff en composed of ό ouer several racks toff layers Rait and ■ eyelets e υ ζ structure, aie arranged such that arise in the composite on all sides closed cells. The method allows, at the same time, ax setting cells of a different Innerorucks in len _b esch2ossenen bag material, preferably a negative pressure relative to the external ambient pressure. This increases the insulation effectiveness of the packaging material.

-L, s is known to produce heat-insulating bags in such a way that that the entire packaging material oaer in the case of Verbur, packaging materials at least a packaging material component made of a p_schäumten Ku.n0tst0.ffaiatex ^ ial or consists of a voluminous nonwoven »

It is also known that oil packaging materials are produced by spatial deformation to provide a layer of foil with closed air cells.

All known processes for the production of heat-insulating flares have compared to the erfindun ^ sgemäßη / experienced both economic as well as technical tile parts, χ the.-foams An insulating effect can only be obtained with a relatively large thickness, i.e. with a rather voluminous packaging. The packaging s technical η properties of the Sackstoffs very much. This applies, for example, to the mechanical> <strength values. Even with the air cell packaging materials of the known type iat As a result of the manufacturing process, one is always bound to a certain few spatial - deformable materials. In contrast, allowed However, aas inventive method the simple production of a relatively thin-walled, dimensionally stable, heat-insulating packaging material, which is a result of the exact adherence to the size of the cell structure and closed by a corresponding internal pressure control in aen The cells can be adjusted to a required isolation effect. In addition, at the same time, the possibility of using of packaging components made from a wide variety of materials, such as plastic, paper, metal, etc. aen, each provided

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packaging requirements are optimally met. The application of ... etallf olien as outer lying Verbunaf olien component verhinaert even a gas and V.asserdampf permeation aes packaging material, is a Licütschutz and also provides ^f: r the A.ufrechterhaltung aes reduced internal pressure in the packaging material cells.

To avoid "vv poor bridges" on the insulation packaging material, multiple layers of packaging material on top of each other. Last different . -structure size are used so that the cells do not come to lie congruently to each other, but when they lie on top of each other the cell walls of a layer on a cell center aarunderlying push layer. is for identically structured lasts is therefore on a corresponding shift of the lietze to each other Pay attention when running into the laminate.

Below is the method claimed as the invention using the example aer production of a packaging material for a heat-insulating iragebeute! packaging must be described in detail.

., ie sketched schematically in Figure 1, a composite packaging material is made from 5 foil components, for example. If the appropriate material is selected, the 5 individual components can be put together in a simple, one-step process. Eei aiesem example here, the composite packing material to each of 2 auasen lying aluminum JB ^l olien, d. Plastic nets of different Eetz structure, made, for example, of LD-Pa and an internal LD-Pä foil. In the case of extremely high demands on the mechanical strength of the bag material, another plastic, e.g. nylon, can be used for the seat and the inner film instead of LD-PE. The aluminum foils can optionally be printed on the outside and coated with a sealable varnish. The gelability of the inner layer of the packaging material is important for the production of space packaging, such as bags, sacks, carrier bags and the like.

The decisive factor for achieving adequate thermal insulation of the packaging material is on the one hand the thickness and hole size of the plastic meshes and, on the other hand, the setting of the negative pressure in the closed packaging material cells. Since the composite packaging materials are produced here by the lamination or lamination process at temperatures above 150 ^° C., the is already produced when the

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manufactured packaging material creates a negative pressure in the coating material cells. This Negative pressure can be used, for example, when working with a negative pressure chamber to be reinforced, on the avoidance of "thermal bridges" by a corresponding arrangement cer on top of each other lying packaging material cells has already been received.

iL'a great application possibility for the heat-insulated packaging materials The aforementioned construction, e.g. in the form of bags, sacks or straps is used in the food industry, for example, for refrigeration and. Frozen food given so that the housewife can use this G & iber without harm from the grocery store to the freezer in the home. Here are the requirements for the insulation effect of the bag materials only in such a way that, on average, the goods are only required to be kept cool for about 2 hours. There are similar examples also in the pharmaceutical and medical packaging sector.

Conversely, these jersey fabrics can also be used equally for used in the production of food storage packs. The selection the packaging materials to be considered for this purpose according to the respective packaging requirements aer! filling goods.

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Claims (4)

-If 1. Process for the production of heat-insulating packaging from composite packaging materials, preferably from plastics and / or their combinations with other packaging materials, such as paper, feetall foils and. the same, built up on at least 3 or more layers of acrylic material, characterized in that when the composite packaging material is laminated, one or more intermediate packaging material layers are now structured and cells that are closed on all sides are formed in the composite with the same or different, preferably lower internal pressure than the external ambient pressure. 2. The method according to claim 1, characterized in that the interposed network layer in the composite packaging material is made of a composite adhesive material. 3 »Process according to claims 1 and 2, characterized in that the composite packing material is made of an opaque or light-reflecting packing material in an aerated layer and / or inner layer. 4. A process according to aJisprüchen 1 to 3 characterized gekennzeic-HNET that for composite packaging materials with a plurality of superimposed cell Chic Israel to avoid "thermal bridges" film nets of different hole size and thickness and / or equal structured agitation with different iiinlaufen to prevent Deckun _& cells sgleichheit be used . 509810/0477
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