FI85843C - Band-shaped packaging material - Google Patents

Description

1 85843

Bandformig förpackningsmaterial

The invention relates to a strip-like packaging material for providing an at least partially breathable and at least partially transparent package for a product to be automatically packaged in a so-called flow-pack machine, the packaging material being formed of one or more strips of breathable material and one or more strips of transparent film, is joined from its longitudinal edge region to the longitudinal edge region of the strip of transparent film.

Breathable and semi-transparent bags or packages have been available in the past. However, when such bags are used, the manufacture and packaging of the package itself must be carried out completely separately, which incurs additional costs.

The problem in the packaging industry is to produce strip-like packaging material which is breathable and partially transparent or provided with a window and which can be supplied in customer-suitable rolls from which packers, such as bakeries,

Until now, flow-pack machines have used a variety of plastic films that do not breathe but are printable and transparent.

It is therefore an object of the invention to provide a strip-like packaging material of the type mentioned above for providing at least a partially breathable and partially transparent package for a product to be packaged in a so-called flow-pack machine.

| ! According to the invention, this object is solved in that an adhesive is attached to the strip of breathable material at at least a part of the points which form the longitudinal and transverse seams of the package.

The edge shapes of the strips of breathable material as well as the transparent film may be necessary to provide a transparent surface of the desired shape.

In a preferred embodiment of the invention, the packaging material is formed of two strips of breathable material and a strip of transparent film connected between them.

The breathable material is preferably paper and the transparent film is preferably plastic.

The strip of breathable material and the strip of transparent film are connected to each other by an adhesive joint, in which case a cold adhesive is used in the adhesive joint.

The strip or layer formed thereon of the transparent film is preferably formed so as to be heat-sealable with the strip of breathable material.

The adhesive applied to the strip of breathable material is preferably heat sealable.

In the following, the invention will be described in more detail with reference to the accompanying drawing, in which:

Figure 1 shows a schematic cross-section of a packaging material according to the invention.

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Figure 2 shows a plan view of the packaging material of Figure 1 from the surface forming the inner surface of the package.

Figure 3 shows a view according to Figure 2 of a packaging material according to a second embodiment of the invention.

In Fig. 1, a strip-like packaging material generally indicated by reference numeral 1 is shown in a schematic cross-section. In this embodiment, the packaging material 1 is formed of two strips 2 of breathable material, e.g. paper, and a transparent film 3, e.g. plastic, connected between them.

The strip 2 of breathable material is connected from its longitudinal edge region 2 'to the longitudinal edge region 3' of the transparent film strip 3, preferably using an adhesive joint and a cold adhesive 5.

The package is formed around the product to be packaged in a flow-pack machine in a manner known per se, so that the longitudinal free edges of the two strips 2 of breathable material are joined together. For this purpose, an adhesive 4 is applied to the strip 2, along the free edge of the strip 2, as shown in Fig. 2. In Figure 1, the top surface forms the inner surface of the package.

The strip 3 of transparent film is, for example, a material which is heat-sealed to the strip 2 of breathable material in a direction transverse to the packaging material 1. The ends of the package can thus be closed by heat sealing.

The strip 3 can be heat-sealable per se or it can have, for example, a heat-sealable layer obtained by cessation.

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If the transparent strip 3 is not wide enough, the adhesive 4 can be applied, e.g. according to Fig. 3, to the points forming the seams entering the package, whereby a sealing area is formed with the adhesive 4 and the transparent film strip 3 in the transverse direction of the packaging material strip.

The packaging material 1 according to the invention is prepared in the following manner.

A heat-sealable adhesive 4 is applied to the strip of breathable material to be unwound from the roll in the desired places and possibly the desired printing is performed. The strip is then cut into strips 2 of the required width and shape and the transparent film strip 3 is joined in a manner known per se, e.g. with cold glue 5. The finished packaging material is rolled onto a small roll for delivery to the customer. that the product is packaged in a manner known per se.

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Claims (8)

1. A strip-like packaging material (1) to provide at least partially breathable and at least partially transparent packaging of one in a so-called. flow-dack machine automatic pre-packable product, which packing material (1) is formed by one or more strips (2) of a breathable material and by one or more strips (3) of a translucent membrane, the band (2) of the breathable material at its longitudinal region (2 ') is joined with the longitudinal region (3') of the translucent membrane (3 '), characterized in that an adhesive blank (2) is attached to the band (2) of the breathable material. 4) at least in some of the places which form the longitudinal and transverse end joints of the package. Packaging material according to claim 1, characterized in that the packaging material (1) is formed by two strips (2) of a breathable material and one between these folded strips (3) of a translucent membrane. 3. Packaging material according to claim 1 or 2, characterized in that the breathable material is of DaDper. Packaging material according to any one of claims 1-3, characterized in that the transparent membrane is of plastic. Packaging material according to any one of claims 1-4, characterized in that the web (2) of the breathable material and the band (3) of the transparent membrane are connected to each other by an adhesive joint. 8 85843 6. Packaging material according to claim 5, characterized in that calliin (5) is used in the patch between the band (2) of the breathable material and the band (3) of the translucent membrane. Packaging material according to the claims 1 to 6, characterized in that the band (3) of the translucent membrane or layer formed therein should be hot-bonded with the band (2) of the breathable material. Packaging material according to any one of claims 1-7, characterized in that the adhesive (4) stretched on the band (2) of breathable material is hot-joining. li