DE102009036977B4 - Paper foil composite and label and shipping envelope from the paper foil composite - Google Patents

Abstract

A paper film composite (1) comprising a first and a second paper layer (10, 30) and a film composite (20) laminated or laminated between the first and second paper layers (10, 30) and comprising at least two film layers (21, 22) whose molecular orientation (40, 50) is inclined to one another, characterized in that the molecular orientation of the at least two film layers (21, 22) is aligned in the direction of the layer plane of the at least two film layers, the paper type or the paper material of the paper layers being different ,

Description

The invention relates to a paper film composite and a label and a shipping envelope from the paper film composite.

Currently, paper film composites are known as a material in which a film layer of plastic, possibly also metallized plastic, is laminated or laminated between two layers of paper. As a result, the paper-foil composites visually give the impression of paper, since the film layer is located between the two paper layers and is not visible.

Such paper film composites have a high tear strength and are therefore used in a variety of fields, in which in addition to such a property at the same time a simple Beschriftungsmöglichkeit, printing option and Verklebungsmöglichkeit on both sides of the material is required. For example, labels, envelopes, mailers, and folding bags are made from such paper film laminates.

However, such paper film composites do not have tear propagation resistance. This means that such a paper foil composite, if it should ever be torn or damaged at one point, can be easily carried away by a human or even at this point tearing even at low tensile forces without difficulty or easily. This is unfavorable, especially in those cases in which the article, which is made of the paper film composite, to wrap or absorb another material or object. In particular, this is unfavorable in the case of labels, envelopes, mailers and folding bags, as they can be so torn or torn in the absence of tear propagation that they can no longer fulfill their function.

The publication US 5910353 A discloses a composite material having two outer paper components and an intermediate core plastic component.

The publication DE 2062625 A discloses a layered material, in particular a layered paper reinforced by stripes.

The publication EP 1529634 B1 discloses a laminated material having crossed-laminated plastic film layers.

The publication DE 3132838 A1 discloses a packaging material of two bonded and stretched films whose stretching axes are arranged at an angle of 45-90 ° to each other.

The publication US 3328227 A discloses a flexible multilayer laminate material having improved crack propagation properties through cross-lamination.

It is therefore an object of the invention to provide a paper film composite and a label and a shipping envelope from the paper film composite available, which have a high tear strength and at the same time a simple Beschriftungsmöglichkeit on both sides of the paper film composite.

The object is achieved by a paper film composite according to claim 1.

The paper film composite has a first and a second paper layer and a film composite. The film composite is laminated or laminated between the first and second paper layers and comprises at least two film layers whose molecular orientation is inclined to each other.

Advantageous embodiments of the paper film composite are specified in the dependent claims.

It is advantageous if the molecular orientation of in each case two adjoining film layers of the at least two film layers is inclined relative to one another.

Preferably, the molecular orientation of the at least two film layers is arranged at an angle of substantially 45 ° to each other.

According to the invention, the molecular orientation of the at least two film layers is aligned in the direction of the layer plane of the at least two film layers.

In addition, at least one of the first and second paper layers may consist of more than one paper layer. Here, the paper type of the paper layers may be different.

Furthermore, each of the at least two foil layers can be made of polyethylene.

In addition, the aforementioned object is achieved by a label according to claim 7, which has a paper film composite, as described above. In this case, the label can be made from the paper film composite.

In addition, the aforementioned object is achieved by a shipping envelope according to claim 9 which has a paper film composite as described above. In this case, the shipping envelope can be made from the paper film composite.

The paper sheet composite described above can be cut, punched, printed or lettered just as well as paper, and can be folded since its outer layers are paper. This is a great advantage over conventional materials currently used, in particular, for mailing envelopes.

In addition, the paper film composite in addition to the high tear strength and the high tear propagation resistance. Thus, the described paper film composite can be used well for labels as well as for shipping envelopes, such as envelopes, mailers and folding bags, etc.

• 1 eine Querschnittsansicht eines erfindungsgemäßen Papierfolienverbunds;
• 2a eine Draufsicht auf einen Folienverbund aus zwei Folienschichten; und
• 2b eine weitere Draufsicht auf einen Folienverbund aus zwei Folienschichten.

Due to the production of the film composite made of polyethylene, which is 100% recyclable, the paper film composite is 100% recyclable and therefore environmentally friendly when the materials have been separated.
The invention will be described in more detail with reference to the accompanying drawings. Show it:

• 1 a cross-sectional view of a paper film composite according to the invention;
• 2a a plan view of a film composite of two film layers; and
• 2 B a further plan view of a film composite of two film layers.

How out 1 can be seen, there is a paper film composite 1 from a first paper layer 10 , a film composite 20 with a first film layer 21 and a second film layer 22 and a second paper layer 30 ,

The film composite 20 is both on the first paper layer 10 as well as the second paper layer 30 laminated or laminated. In addition, the first and second film layers 21 . 22 of the film composite 20 laminated together or laminated.

1. a) Heißlaminieren, bei welchem ein bei Zimmertemperatur fester Klebstoff der Folienschicht durch Führen über eine heiße Rolle eines Laminiergeräts auf ca. 60 bis 80 ° C erwärmt wird und mit mindestens einer der Papierschichten und einer anderen Folienschicht verschmilzt.
2. b) Kaltlaminieren, bei welchem sich an der Folienschicht ein normaler Klebstoff befindet und welches auch ohne besonderes Gerät von Hand vorgenommen werden kann.
3. c) Extrusionslaminieren, bei welchem mittels einer Extrusions-Laminiermaschine geschmolzener Kunststoff zu der Papierschicht extrudiert wird.

Herein laminating is understood to mean the joining of a thin film-like layer with a carrier material by means of an adhesive, wherein the following types of lamination exist:

1. a) hot lamination, in which a solid at room temperature adhesive of the film layer is heated by passing over a hot roll of a laminating to about 60 to 80 ° C and merges with at least one of the paper layers and another film layer.
2. b) cold lamination, in which there is a normal adhesive on the film layer and which can be made by hand even without special device.
3. c) Extrusion laminating in which molten plastic is extruded to the paper layer by means of an extrusion laminating machine.

Laminating is the joining of several layers or layers of identical or different materials (paper or films) with the aid of suitable laminating agents (lacquer, glue, wax, plastic (for example polyethylene)).

1. a) Nasskaschieren, womit ein Verbinden mittels nassem Klebstoff bezeichnet wird,
2. b) Trockenkaschieren, womit ein Verbinden mittels trockenem Klebstoff bezeichnet wird, und
3. c) Thermokaschieren, womit ein Verbinden ohne Klebstoffe, jedoch mit Wärme oder Druck bezeichnet wird.

The film composite 20 or the first and second film layers 21 . 22 and / or the first and second paper layers 10 . 30 For example, at least one of the three types of lamination may be applied to another layer:

1. a) wet lamination, which means bonding by means of wet adhesive,
2. b) dry laminating, which means bonding by means of dry adhesive, and
3. c) thermal laminating, which means bonding without adhesives, but with heat or pressure.

When joining the first and second paper layers 10 . 30 and / or the first and second film layers 21 . 22 can therefore be used hot glue or cold glue.

In 2a and 2 B is shown that the first and second layers of film 21 . 22 each a predetermined molecular orientation 40 . 50 of the plastic from which the first and second film layers have been made 21 . 22 are made. How out 2a and 2 B As can be seen, the molecular orientation 40 the first film layer 21 for molecular orientation 50 the second film layer 22 inclined. That is, the molecular orientation 40 the first film layer 21 is in 2a and 2 B diagonal to the molecular orientation 50 the second film layer 22 arranged. In 2a an inclination of 90 ° to each other is shown. Preferably, the inclination to each other is about 45 °, as in 2 B shown. In the ways described creates a so-called cross-compound.

According to the invention, the molecular orientation of the first and second film layers 21 . 22 in the direction of the layer plane of the first and second film layers 21 . 22 aligned. That is, the molecular orientation of the first and second film layers 21 . 22 is in the direction of the areal extent of the first and second film layers 21 . 22 oriented perpendicular to the thickness of the film layer.

The first and second paper layers 10 . 30 For example, thermal paper, woodfree white natural paper, coated paper, vegetable paper, recycled paper or paperboard can be made from the paper types or paper materials.

The first and second paper layers 10 . 30 may have a weight of 25 g / m ² to 50 g / m ² . In particular, the first and second layers of paper 10 . 30 the same weight. In addition, the first and second layers of paper 10 . 30 be made of the same material, such as white paper or recycled paper. However, it is also possible that the first paper layer 10 made of a different material than the second paper layer 30 ,

The first and second film layers 21 . 22 are made of polyethylene (PE) as the main material, for example. The first and second film layers 21 . 22 in this case preferably each have a thickness of about 6 microns and a weight of 45 to 50 g / m ² . The first and second film layers 21 . 22 however, they may also have a thickness of up to 215 μm and, for example, a weight of 20 to 70 g / m ² .

Such a made first and second film layer 21 . 22 is not attacked or affected by seawater, salt or aqueous solutions, solutions with high polarity (alcohols), basic or non-oxidizing acidic solutions. If the film composite 20 from the first and second film layers 21 . 22 with strong oxidizing acids, for example nitric acid, hydrogen peroxide, this leads to a loss of tensile properties and color fading.

Certain oils and solvents, in particular aromatic or halogenated hydrocarbons cause a swelling of the film composite 20 , resulting in a transparency of the film composite 20 leads. However, this also means that the properties of the high tear strength and excellent tear propagation resistance are not impaired or reduced by the substances mentioned.

In such a design of the film composite 20 together with the first and second paper layers 10 . 30 has the paper foil composite 1 Overall, an excellent tear propagation resistance. That is, even if the Papierfolienverbund 1 Despite its high tear strength should be torn or cut in one place, it can not be easily carried on this item by a man or a machine, when stuck at this point on an object, of this object. This may cause further damage to the paper film composite 1 or of the article made from it, such as a label or a shipping envelope, are prevented.

All previously described embodiments of the paper film composite 1 can be used individually or in all possible combinations. In particular, the following modifications are conceivable.
Even if in 1 only two layers of paper 10 . 30 may be one or both of the two paper layers 10 . 30 also have more than one paper layer, for example two or three etc. paper layers. The plurality of paper layers of the first and / or second paper layer 10 . 30 may in turn consist of different types of paper or paper materials, as described above.

Even if the film composite 20 in 1 and 2 only as two layers of film 21 . 22 is described, the film composite 20 also have more than two film layers. These are preferably the molecular orientations 40 . 50 of adjacent film layers 21 . 22 inclined against each other. Preferably, the molecular orientation bias is about 45 °.

The first and second film layers 21 . 22 may preferably be made of HDPE as the main material. HDPE ("HD" stands for "high density") is polyethylene (PE) with weakly branched polymer chains, which is why it has a high density between 0.94 g / cm ³ and 0.97 g / cm ³ .

The shipping envelope 20 may be an envelope of a conventional format such as B4, C4, D4, etc. In addition, the shipping bag 20 be designed as an air cushion pocket or cotton pad pocket, etc.

The label can be of any size. For example, the label may be a label that is hung in the store on sales items for pricing, such as clothing, bags, etc.

LIST OF REFERENCE NUMBERS

1

Paper composite film

10

First paper layer

20

film composite

21

First foil layer

22

Second film layer

30

Second paper layer

40

Molecular orientation

50

Molecular orientation

Claims (10)

A paper film composite (1) comprising a first and a second paper layer (10, 30) and a film composite (20) laminated or laminated between the first and second paper layers (10, 30) and comprising at least two film layers (21, 22) whose molecular orientation (40, 50) is inclined to one another, characterized in that the molecular orientation of the at least two film layers (21, 22) is aligned in the direction of the layer plane of the at least two film layers, the paper type or the paper material of the paper layers being different , Papierfolienverbund after Claim 1 wherein the molecular orientation (40, 50) of each of two adjoining film layers (21, 22) of the at least two film layers (21, 22) is inclined to each other. Papierfolienverbund after Claim 1 or 2 , wherein the molecular orientation (40, 50) of the at least two film layers (21, 22) is arranged at an angle of 45 ° to each other. A paper film composite according to any one of the preceding claims, wherein at least one of the first and second paper layers (10, 30) consists of more than one paper layer. A paper film composite according to any one of the preceding claims, wherein each of the at least two film layers (21, 22) is made of polyethylene. Papierfolienverbund after Claim 5 wherein the first and second film layers (21, 22) are made of HDPE as the main material. Label with a paper film composite (1) according to one of the preceding claims. Label after Claim 7 , wherein the label from the paper film composite (1) is made. Shipping envelope with a paper foil composite (1) according to one of Claims 1 to 4 , Shipping envelope after Claim 9 , wherein the shipping envelope from the paper film composite (1) is made

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