DE102007023493A1 - Security bag with a security closure system with a thermochromic security element - Google Patents

Abstract

The invention relates to a security bag (1) having a security closure system (4) with a thermochromic security element (10), the security pocket (1) being formed from a film material, in particular polyethylene or polypropylene, and the closure system (4) being in the form of a self-adhesive element (6 ) is arranged on at least a first closure part (3) of the security pocket (1) with peelable protective film element (7) 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 so in a thermally assisted opening attempt of the security pocket (1) a visually and / or has machine recognizable color effect and this irreversible color change additionally by means of brief heating to over 125 ° C has a reversible color change and thus the thermochromic security element (10) can be checked for falsification or originality. The invention has the object of developing 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.

Description

The The invention relates to a security bag from preferably environmentally friendly Polyethylene or polypropylene with an irreversible safety closure system according to the preamble of 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.

purpose the measures is one with a tape sealable To create closure bags whose unauthorized opening is readily apparent. For this purpose, the said Document that the adhesive only under high temperatures is solvable and if such an opening attempt takes place under high temperatures, should be a thermochromic layer show the unauthorized opening.

disadvantage However, the cited document is that in the thermochromic Layer after heat exposure did not change color more verifiable. It exists the need to counter the argument of a user, that the color change only inadvertently due to high temperatures done, 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 Solution of the problem is the invention by the Technical teaching of claim 1 characterized.

essential Feature of the invention is that now provided according to the invention is that an irreversible color change in a first phase of a Heating takes place, preferably in a temperature range below 90 ° and larger than that Room temperature.

Further is essential in the invention that the visually recognizable, irreversible color change can now control that one briefly this irreversible color change to a warming of over 90 ° brings preferably 125 ° Celsius and this irreversible color change then becomes reversible and a for example, before the irreversible color change associated red color becomes transparent again and when it cools down, for example turn below 90 ° C again the red irreversible Color change takes.

In order to An additional security feature is created with which is possible for the first time, the originality to check the color change.

It It can happen that because of fraud attempts Although an irreversible color change takes place, but not comes from the manufacturer. In this way, the manufacturer can own his Easily test color composition by taking it for a short time the irreversible color change to a higher temperature brings and thereby receives a reversible color change and check the originality of the display strip can.

To another essential measure of the present invention is it otherwise provided for (see claim 2) that the thermochromic security element even against chemical attack is stable. In particular, it is stable to solvents, and does not let itself of the mentioned solvents attack and solve.

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

On this becomes the irreversible color change useful in thermochromic applications additionally assigned a chemochromic color change.

This was not known in the prior art.

Important is that even during a chemochromic attack on the security strip first an irreversible color change takes place and that also when heating this irreversible color change reversible to a higher temperature this color change and thus the originality of the security strip is also verifiable in chemical attacks.

The combination of the two safety measures (checking the originality of a thermochromic change of color when exposed to heat and checking for irreversible color changes) chemical attack on the security strip) results in a further improvement of 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.

Of the Subject of the present invention does not arise only from the subject matter of the individual claims, but also from the combination of the individual claims among themselves.

All in the documents, including the abstract Information and features, in particular the spatial shown in the drawings Training, are claimed as essential to the invention, as far as individually or in combination with the state of the art Technology is new.

in the Below, the invention will be described with reference to only one embodiment illustrative drawings explained in more detail. in this connection go from the drawings and their description further essential to the invention Features and advantages of the invention.

It demonstrate:

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

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

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

In the 1 - 3 is generally a security bag 1 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 Carrying behavior is similar to a conventional Grocery bag, as in traditional self-service stores is sold on a large scale.

The security bag is opened in its upper area and it forms a back 2 and one opposite the front 3 ,

At It is closed on the sides and indeed over a thermal one Welding process, or via any adhesive method or other compounds, such as. B. ultrasonic welding process and more.

To lock the security bag 1 is a security lock system 4 provided, which in the embodiment shown from a safety closure band 5 which consists on the inside with an adhesive layer 6 is provided.

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

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

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

Between the adhesive layer 6 and the safety closure band 5 can also be provided a print.

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

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

It This can also be a lettering.

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

Preferably, the range extends 11 across the entire width of the security bag 1 ,

It is important that the thermochromic Si cherheitsmaterial 10 in that area 11 now exactly opposite to the detention area 8th the peel-off film 7 is and that if the peel-off film 7 is peeled off, the adhesive layer 6 now in direct contact with the thermochromic security feature 10 comes and covers this irreversibly.

In order to it is protected against external influences and can not be removed without damage.

This is where the invention comes in, which provides that if attack with a warming agent on the adhesive area 8th done that then the thermochromic security feature 10 has an irreversible color change, either from the outside on the back 2 the security bag 1 or from the opposite side through the security fastener tape 5 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.

To now control that thermochromic security feature 10 actually from the manufacturer of the security bag or the manufacturer of the security feature 10 is provided according to a development of the invention that the reviewer now in the field 11 the thermochromic security feature 10 must apply a higher temperature, 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, the nature and originality of the thermochromic security feature 10 to control.

The same applies in the embodiment in an attack on the security fastener tape 5 with a chemical solvent, which also has the security feature 10 Now chemochrom turns 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 chemochrome safety feature 10 is.

This allows the originality of the chemochromic security feature 10 be determined.

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

1

security pocket

2

back the security bag, second closure part

3

front the security bag

4

Security Locking System

5

Security closure tape with glue

6

adhesive layer

7

liner with non-stick properties

8th

adhesion area 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 safety feature

11

Area the thermochromic security feature

12

connection the front and back of the security bag

QUOTES INCLUDE IN THE DESCRIPTION

This list The documents listed by the applicant have been automated generated and is solely for better information recorded by the reader. The list is not part of the German Patent or utility model application. The DPMA takes over no liability for any errors or omissions.

Cited patent literature

• EP 0773889 B1 [0002, 0006]
• WO 00104221 A1 [0005]

Claims (7)

Security bag ( 1 ) with a security closure system ( 4 ) with a thermochromic security element ( 10 ), the security bag ( 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 a first closure part ( 3 ) the security bag ( 1 ) with removable protective film element ( 7 ) and the thermochromic security element ( 10 ) at least in sections 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 additionally by means of brief heating to over 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 has signaling properties in an opening test with solvents such as acetone, ethanol, i-propanol, 2-butoxyethanol, nitro, 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 processes strip-shaped or at least piecewise in one 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 largely transparent form and when exceeding 50 ° C, in particular 65 ° C or below 100 ° C, especially below 90 ° C has a visually and machine recognizable irreversible color and additionally by means of short-term heating to about 125 ° C a reversible Color change in the direction of the original transparent color impression and so 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 security bag ( 1 ) with 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 ) prepared according to claim 3 for the controllable storage of objects.