EP1995178A1 - Security bag with security locking system with a thermochrome security element - Google Patents

Abstract

A security pouch (1) has a tamper-proof closure (4) with a thermo-chromatic security mark (10). The pouch consists of polyethylene or polypropylene foil and the closure is a self-adhesive unit (6) consisting of a first part (3) with a protective foil peel strip (7). The thermo-chromatic element (10) is on a second closure part (2). If an attempt is made to open the foil at a temperature less than 100[deg] C the foil undergoes an irreversible colour change.

Description

The invention relates to a security bag made of preferably environmentally friendly polyethylene or polypropylene with an irreversible security closure system according to the preamble of patent claim 1.

Such an irreversible security closure system is, for example, with the subject of EP 0 773 889 B1 known. It is a tamper-evident tape and a matching closure.

The purpose of the measures is to provide a closable with an adhesive tape closure bag whose unauthorized opening is readily apparent. For this purpose, the cited document provides that the adhesive can only be dissolved under high temperatures, and if such an opening attempt takes place at high temperatures, a thermochromic layer should indicate the unauthorized opening.

Disadvantage of the cited document, however, is that the color change carried out in the thermochromic layer after exposure to heat can no longer be verified. Indeed, there is a need to counter the argument of a user that the color change was done unintentionally by high temperatures, without an opening attempt was based.

In the subject of WO 00104221 A1 Another security strip has become known which has a special thermochromic ink composition, but which is unable to verify the originality of the thermochromic color change.

The invention is therefore based on the object, starting from the EP 0 773 889 B1 develop a tamper-evident tape and a corresponding closure so that after the occurrence of the thermochromic color change and the originality of the display element can be checked.

To solve the problem, the invention is characterized by the technical teaching of claim 1.

An essential feature of the invention is that now provided according to the invention that an irreversible color change takes place in a first phase of heating and preferably in a temperature range below 90 ° and greater than the room temperature.

Furthermore, it is essential in the invention that it is now possible to control the visually recognizable, irreversible color change by temporarily bringing this irreversible color change to a heating of over 90 ° preferably 125 ° Celsius and this irreversible color change is then reversible and a before the For example, red color associated with irreversible color change again becomes transparent and, for example, once again cools down below 90 ° Celsius, again assumes the red irreversible color change.

This creates an additional security feature that makes it possible for the first time to verify the originality of the color change.

It may indeed happen that due to fraud attempts, although an irreversible color change takes place, but not from the manufacturer. In this way, the manufacturer himself can easily check his color composition by temporarily bringing the irreversible color change to a higher temperature, thereby obtaining a reversible color change and thus checking the originality of the display strip.

According to a further essential measure of the present invention, it is also provided (see claim 2) that the thermochromic security element is also stable against chemical attack. In particular, it is stable to solvents, and can not be attacked and dissolved by the solvents mentioned.

This also serves to secure the security element, because it is therefore stable against chemical attack and if a chemical attack with a chemochromic color change, so that an attack with the chemical solvents readily recognizable.

In this way, the thermochromic usable irreversible color change is additionally assigned a chemochromic color change.

This was not known in the prior art.

It is important that even with a chemochromic attack on the security strip initially an irreversible color change takes place and that also when heating this irreversible color change to a higher temperature, this color change is reversible and thus the originality of the security strip is also verifiable in chemical attack.

The combination of the two security measures (checking the originality of a thermochromic change of color when exposed to heat and checking for irreversible color change during chemical attack on the security strip) further improves the security effect of this security strip. Thus, the security strip is protected against thermal attack and against chemical attack and hardened and therefore meets the highest security requirements. The originality can be checked in both cases.

The subject of the present invention results not only from the subject matter of the individual claims, but also from the combination of the individual claims with each other.

All information and features disclosed in the documents, including the abstract, in particular the spatial design shown in the drawings, are claimed to be essential to the invention insofar as they are novel individually or in combination with respect to the prior art.

In the following the invention will be explained in more detail with reference to drawings showing only one embodiment. Here are from the drawings and their description further features essential to the invention and advantages of the invention.

Figur 1:

eine schematische Darstellung einer erfindungsgemäßen Sicherheitstasche (1) mit dem Sicherheitsverschlußsystem (4);

Figur 2:

einen schematischen Schnitt durch eine erfindungsgemäße Sicherheitstasche (1) im geschlossenen Zustand, mit dem Sicherheitsverschlußsystem (4) und dem thermochromen Sicherheitsmerkmal (10) mit zusätzlichen signalgebenden Eigenschaften;

Figur 3:

die Sicherheitstasche (1) gemäß Figur 2 im geöffneten Zustand.

Show it:

FIG. 1:

a schematic representation of a security pocket (1) according to the invention with the security closure system (4);

FIG. 2:

a schematic section through a security pocket (1) according to the invention in the closed state, with the security closure system (4) and the thermochromic security feature (10) with additional signaling properties;

FIG. 3:

the security bag (1) according to FIG. 2 in the open state.

In the Figures 1-3 In general, a security bag 1 is shown which preferably consists of a polyethylene, polypropylene, and the like, environmentally friendly plastic materials. It has an exemplary thickness of z. B. 20 to 200 .mu.m, in particular 30 to 80 microns.

The wearing style is similar to a conventional grocery bag, as it is sold in conventional self-service stores on a large scale.

The security pocket is opened in its upper area and forms a back 2 and a front 3 opposite.

On the sides, it is closed and indeed via a thermal welding process, or via any adhesive method or other compounds, such. B. ultrasonic welding and the like.

For closing the security pocket 1, a security closure system 4 is provided, which in the embodiment shown consists of a security closure band 5, which is provided on the inside with an adhesive layer 6.

It is important that the security fastener tape 5 is glued to the adhesive layer 6 in the area 9 on the outside of the front of the security pocket 1, while the protruding edge over which the security fastener tape 5 protrudes beyond the top of the front side, also coated with the adhesive layer 6 and here but covered with a release liner 7. The peel-off film 7 has non-stick properties and consists for. B. from a siliconized paper or the like.

The adhesive region of the release liner 8 is therefore also coated with the adhesive layer 6.

It is important that the adhesive layer 6 can be colored in any way, for. B. may have a blue hue. Likewise, the security fastener tape 5 may have a different color than, for example, the color of the security pocket 1 with the backs 2 and the front side 3.

Between the adhesive layer 6 and the security fastener tape 5, a printing can also be provided.

The printing is then visible from the outside through the security fastener tape 5.

It is important now that on the opposite side, namely in the region of the inside of the back 2, a thermochromic security feature 10 is arranged, which narrow rectangular structure extends for example over the entire width of the security pocket 1.

It can also be a lettering.

The thermochromic security feature 10 is applied by pressure through any printing process, in particular by flexographic printing or other means.

Preferably, the area 11 extends over the entire width of the security pocket. 1

It is now important that the thermochromic security material 10 in the area 11 is now exactly opposite to the adhesion region 8 of the release liner 7 and that when the release liner 7 is peeled off, the adhesive layer 6 now comes into direct contact with the thermochromic security feature 10 and irreversibly covers it ,

So it is protected against external influences and can not be removed without damage.

This is where the invention comes in, which provides that when attack with a warming agent on the adhesive area 8, that then the thermochromic security feature 10 has an irreversible color change, either from the outside on the back 2 of the security pocket 1 or from the opposite side through the Safety closure band 5 forth is visible. It may be, for example, a showy red or pink color, so that the color change after attack with a warming agent is readily apparent.

In order to control that the thermochromic security feature 10 actually originates from the manufacturer of the security bag or the manufacturer of the security feature 10, according to a development of the invention, the reviewer now has to apply a higher temperature in the area 11 of the thermochromic security feature 10, For example, 125 ° and then that the irreversible color change is reversible again and z. B. converted into a transparent color change. As soon as the temperature is removed, the irreversible color change with the striking red or other colored ink sets in again.

This makes it possible for the first time to control the type and originality of the thermochromic security feature 10.

The same applies in the embodiment in an attack on the security fastener tape 5 with a chemical solvent, also the security feature 10 now turns chemochrom as soon as it comes in contact with the chemical solvent. It suffices here that it is not a liquid contact, but a vaporous influence suffices here for the chemochromic color change.

In this case, according to an essential feature of the invention, it is likewise provided that the originality of this chemochromic color change can be checked by the fact that the security feature is likewise adjusted to a temperature of, for example, 10 ° C. B. 125 ° Celsius, whereby the chemochromic color change disappears and this is a feature that it is the manufacturer's intended and intended chemochromic security feature 10.

Thus, the originality of the chemochromic security feature 10 can be determined.

According to the invention it is also provided that both the security feature 10 chemochromic and thermochromic reacts, whereby the originality can be checked in both cases of action.

LIST OF REFERENCE NUMBERS

1

security pocket

2

Rear side of the security bag, second closure part

3

Front side of the security bag

4

Security Locking System

5

Safety fastener tape with glue

6

adhesive layer

7

Peel-off film with non-stick properties

8th

Adhesive area of the release liner on the adhesive layer

9

Bonded area of the security closure tape (5) with the adhesive layer (6) on the front side 83)

10

Thermochromic security feature

11

Area of the thermochromic security feature

12

Connection of the front and the back of the security bag

Claims (7)

Security bag (1) with a security closure system (4) with a thermochromic security element (10), wherein the security pocket (1) is formed from a film material, in particular polyethylene or polypropylene, and the closure system (4) in the form of a self-adhesive element (6) on at least one first closure part (3) of the security pocket (1) with peelable protective film element (7) is arranged and the thermochromic security element (10) at least piecewise on a second closure part (2) is arranged and at a temperature greater than 50 ° C and in particular greater than 65 ° C. and below the softening temperature of the self-adhesive element (6), in particular below 100 ° C and especially below 90 ° C, has a visually recognizable irreversible color change and thus in a thermally assisted opening attempt of the security pocket (1) has a visually and / or machine recognizable color effect and this irreversible color change hlag additionally by brief heating to about 125 ° C has a reversible color change and so the thermochromic security element (10) can be checked for falsification or originality. Security bag (1) according to claim 1, characterized in that the thermochromic security element (10) in addition to the thermochromic signaling properties in a thermally assisted opening test additionally signaling properties, which in an opening test with solvents such as acetone, ethanol, i-propanol, 2- Butoxyethanol, nitro dilution, xylene, ethyl acetal, n-hexane, tetrahydrofuran, toluene, 5% acetic acid, 2% hydrochloric acid, 1% sodium hydroxide solution or general aqueous substances. Security bag (1) according to claim 1 to 2, characterized in that the thermochromic security element (10) with the chemochromic additional functions on solvent or aqueous substances by means of flexographic printing, offset printing, gravure printing, screen printing, Roll coating, knife coating, spraying, dispensing, inkjet printing and the like coating and printing process strip-wise or at least piecewise in an area (11) or graphically designed in the area (11) is applied. Security bag (1) according to claim 1 to 3, characterized in that the thermochromic security element (10) is applied in a substantially transparent form and when exceeding 50 ° C, in particular 65 ° C or below 100 ° C, in particular below 90 ° C a visually and machine recognizable irreversible color and additionally by means of brief heating to over 125 ° C has a reversible color change in the direction of the original transparent color impression and thus the thermochromic security element (6) can be checked for falsification or originality. Security bag (1) according to claim 1 to 4, characterized in that the thermochromic security element (10) is constructed from at least the following components: Method for producing a security bag (1) having a security closure system (4) with a thermochromic security element (10) according to one of claims 1 to 5, wherein the thermochromic security element (10) is equipped with additional chemochromic functions. Application of a security bag (1) with a security closure system (4) with a thermochromic security element (10) produced according to claim 3 for the controllable storage of objects.

Images