DE2252059A1 - FLEXIBLE AREA MATERIAL MADE OF PLASTIC AND PACKAGING CONTAINER MADE FROM THIS MATERIAL - Google Patents

Description

Flexible sheet material made of plastic and from this material

manufactured packaging container

The invention relates to a flexible sheet of arts fabric, especially for the production of a flexible, bag-like Packaging container that can be torn open at one edge, and a packaging container made from this sheet material.

In the case of packaging containers made of plastic films, the container is often welded shut at the top. Here it is difficult to open the container without tearing the foil and spilling the contents of the container ",

The invention is based on the object of a flexible sheet material to create from plastic that can be easily connected by welding with a similar sheet material, but enables the weld seam to be torn open relatively easily, and in particular for the production of flexible, bag-like Packaging container is suitable.

According to the invention, this object is achieved in that the sheet material consists of a polymeric thermoplastic layer Synthetic resin that is flowable at predetermined elevated temperature and pressure conditions, and a mooring layer

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made of a material that is not flowable at the temperature and pressure conditions mentioned.

The mooring layer can be made from a non-thermoplastic film an organic polymer. A polyester resin is preferably used.

If an identical sheet material is placed on the thermoplastic layer of the sheet material in such a way that the outer side the contact layer on the thermoplastic layer of the .un * Direct surface material comes to rest, then these two surface materials can be applied to the support point by exercising a pressure at the predetermined elevated temperature connect with each other, but tear apart again relatively easily at the connection seam. If you put it against it the two sheet materials with their thermoplastic layers against each other, then by exercising one Pressure to establish a permanent connection between the two sheet materials at the predetermined elevated temperature.

It is preferably ensured that on the side of the thermoplastic layer facing away from the contact layer there is preferably one The layer with continuous recesses does not consist of a layer under the temperature and pressure conditions mentioned flowable material is applied. In this way, by welding two with the smooth side and the the recessed layer of sheet materials placed next to one another an even more easily detachable connection, which, however, has sufficient durability for numerous applications as the material of the thermoplastic layer when heated 'and when the pressure penetrates the recesses and merges with the smooth side of the other sheet material connects. On the other hand, there is a permanent connection if two of these flat materials are welded in such a way that that the layers having the recesses face one another. The same also applies in the event that one and the same Sheet material is folded up and welded at the edges,

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It is preferably the one having the recesses Layer around a fiber layer made of polyester resin. It is advantageous here if the thermoplastic layer is thicker than the contact layer, the fiber layer adheres to the thermoplastic layer and the quantity ratio of fiber layer and thermoplastic layer is chosen so that the fiber layer is formed when the said temperature and pressure conditions in the thermoplastic layer is almost completely immersed. This ensures that that the material of the thermoplastic layer completely penetrates the recesses between the fibers when heated.

It is then preferably ensured that the majority of the weight of the fiber layer is made up of aligned fibers which essentially in the same direction in the fiber layer and essentially parallel to the layer arrangement extend. In this way, weld seams produced with the fiber side lying against one another can be particularly easy separate.

The fiber layer can be made of polyester fibers or polyethylene

terephiJalat fibers or equivalent fiber materials be made. These fibers are thermoplastic to a certain extent, but not to the extent that they are suitable for the formation of weld seams., They are under conditions as they are usually used for the production of Weld seams are economically justifiable, non-flowable and fusible, e.g. B. at temperatures of about 50 ° C or 60 ° C up to about 150 ° C or even 250 ° C. Even at at even higher temperatures they are not particularly suitable as weldable material. They are therefore referred to here as called non-thermoplastic or non-weldable. Nevertheless, such fibers have extremely beneficial properties Properties for sheet materials that are used in the manufacture of bag-like containers that become bag-like applicators convertible can be used. Numerous means, which are preferably packed in these containers,

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are evenly distributable substances (e.g. shoe polish or shoe polish). These substances sometimes contain small amounts an organic diluent or other flowable or penetrable organic material. The diluent or flowable organic material should remain in the packaged material and not be irretrievable be absorbed or adsorbed in or on the fiber material of the container. Rather, these substances should mechanically held by the irregular recesses in the fiber layer and the fibers themselves and in this sense "absorbed" will. On the other hand, they should not be irretrievably absorbed by the fibers. A polyester material is therefore particularly suitable as there is minimal, if any, adsorptive or absorptive capacity with respect to this Has diluents or migratory or flowable components. Furthermore, polyester fibers can be largely free of fringes protruding from the main body of the fiber Form projections, which also prevents irretrievable adsorption or absorption of diluents contributes.

To create a tight container, it is particularly advantageous to if an impermeable barrier layer is placed between the mooring layer and the thermoplastic layer, comprising a vinylidene-containing polymer.

Preferably the thermoplastic layer contains polyethylene. '

Particularly favorable ratios are obtained in that the thickness of the contact layer is between 5 and 60 microns and the The thickness of the thermoplastic layer is between about 25 and 300 microns and the fiber layer is no thicker than about 1 mm is.

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A flexible bag-like one made from this sheet material Packaging container, which has a means to be packaged, is designed according to the invention in such a way that the sheet material forming the opposing walls of the container is arranged such that the thermoplastic layer lies on the inside and on the abutting edges the walls are formed tight welds using the temperature and pressure conditions mentioned, that the Surface material of the walls beyond which one weld seam protrudes to the outside that there are two that can be grasped with the fingers Forms flaps, the sheet material of one flap being folded inward to the extent that it is a separating part forms a weld seam between the two walls in the area of almost the entire area and this weld seam on the Interface between the mating layer of the separator and the thermoplastic layer of the opposite sheet material by grasping the tabs with your thumb and forefinger and pulling apart is tearable. This container can be easily torn open at one weld seam because here the non-thermoplastic layer of the inwardly protruding separating part with the thermoplastic layer of the opposite Wall, preferably with interposed fiber layer is connected.

It is preferably ensured in the container that the other weld seams are permanent and the inside of the container torn open at one weld seam to the outside is reversible, so that it can be converted into a bag-shaped applicator to the packaged agent directly to be applied on a surface. Here, the fingers can be put into the pocket-like shape formed by turning them inside out Applicator stuck so that it is protected from contamination during the application of the packaged product after the container is inverted on its outside, are protected.

The bag-like container is not only light and economical by using various conventional welding temperatures

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temperatures and pressures for all weld seams can be produced without that the temperatures or pressures used to form the temporary, d. H. tearable weld seam, must be strictly adhered to, rather, the temporary weld seam cannot easily be torn open in an undesirable manner by accident when the pack is handled in the normal way in trade. Rather, the temporary weld seam can only be torn easily and cleanly, when the flaps of the sealed package are pulled apart.

The end of the separating part can protrude inwardly into the container beyond the temporary weld seam in order to provide additional security against leakage of the container contents to give the case that an inadvertently high pressure is exerted on the container.

The container can be used to package a variety of means including solid or powdered as well pasty or liquid agents. The packaging of finely dispersible substances such as the is particularly advantageous various polishing agents, cleaning agents, body care products, pastes, creams, skin and beauty lotions, Oil, paints, wax, etc.

A packaging container to which the invention is also applicable is described in U.S. Patent 3,647,305.

The invention and its developments are described below with reference to schematic drawings of preferred exemplary embodiments described in more detail.

Fig. 1 shows a schematic cross section through a flexible sheet material formed according to the invention represent.

Fig. 2 shows a side view of a container made from this sheet material and

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FIG. 3 schematically shows the cross-sectional view 3-3 according to FIG.

The sheet material according to FIG. 1 has a multilayer arrangement 10 with at least two different layers, to which a layer 11 of fiber material is attached. The fiber layer 11 can be woven or non-woven. In general it extends over the entire one side of the multi-layer arrangement 10 forming the base body, so that it is the same size as this one.

The fibers of the fiber layer 11 are polyester fibers. The polyester fibers make up at least 50 % of the weight of the fiber layer, with a minor proportion being non-polyester material (e.g. made of glass or a polyamide known as nylon, or made of an acetate). A linear polymeric polyester made from monomers of terephthalic acid and ethylene glycol is an example of a preferred polyester. The mainly preferred polyesters are formed from monomers of the aromatic organic dicarboxylic or tricarboxylic acids and monomers of alcohols which contain at least two hydroxyl groups. If desired, further groups or short chains can be present in the monomers. These polyesters essentially do not adsorb or absorb any diluents or low molecular weight flowable or migratable organic components that are sometimes found in shoe and other polishing agents. This is essential to the maintenance of the packaged media so that it will remain effective for its intended purpose after storage, shipping and display.

The multi-layer arrangement of the new sheet material, which forms the base body, contains a contact layer 12 (also underlayer, Called carrier or support layer) with a fiber-free back. The landing layer 12 is at predetermined Temperature and pressure ratios, such as those used for production

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tight connections or weld seams are required, in particular an elevated temperature of about 60 ° C to 150 ° C or even 250 ° C, substantially non-flowable or not fusible or not weldable by applying heat. Such temperatures are used to weld the by application of heat-weldable thermoplastic layer 13 of the multilayer arrangement 10 is used. The mooring 12 is made of a polyester material that is comparable to the polyester composition of the fiber layer. Polyethylene terephthalate or an equivalent is particularly suitable. It can be as thin as about 5 microns, however, is usually at least about 6.35 microns (1/4 mil) up to about 40 or 60 microns thick. It is preferably as thin as possible while essentially retaining its dimensional stability and also contributes to the dimensional stability of the composite sheet. Usually is the outside of the lay-on layer 12 is smooth and free of any coating, but if desired it can be a coating for one have low or precisely adjusted degrees of adhesion of a thermoplastic material.

Not suitable for making a welded joint (i.e., non-meltable) mooring layer 12 can (and is preferably) a layer 14 or a coating with barrier properties or of a liquid-impermeable material that contributes to To make the composite sheet material impermeable to liquids, be attached. To this end are Polymers containing VinyUden, e.g. B · vinylidene chloride containing polymers such as that manufactured by the Dow Chemical Company "Saran" fabric, suitable. This barrier layer is preferably 12 to 40 or 60 microns thick. the Property of polymers of vinylidene chloride (or other vinylidene halides, e.g. fluorine) to shrink and Being distorted during welding (e.g. when resistance heating is applied) is thereby overded * or essentially avoided that this layer is thin and with the relatively dimensionally stable polyester application

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layer is united.

The next layer 13, which can optionally be applied directly to the polyester lay-on layer (e.g. if you can manage without an auxiliary barrier layer for the product to be packaged), one can be softened by heating or for the production of a tight seam weldable thermoplastic polymer synthetic resin. It should be noted that the material of the barrier layer 14, which helps to make the sheet material impermeable to liquids and even vapor to make, can also have the properties of a heat-sealable thermoplastic layer 13. However, polyethylene is a particularly useful weldable synthetic resin. However, it is also possible to use polyvinyl chloride (or even polyvinylidene chlorides) if desired, especially if a dielectric Method is used to manufacture a container from the sheet material. Also other known polymers, weldable or thermoplastic synthetic resins with relatively poor adhesiveness or no adhesiveness at room temperature can be used. That's what polyacrylates are like with such properties suitable. The most economical polymeric weldable thermoplastic resin with the however, polyethylene is the desired properties. Depending on the polymerization process used and the degree of polymerization in polyethylene (including any crosslinking that may be present) changes Amount by which the temperature has to be raised in order to carry out a weld seam. Preferred welding temperatures range from about 50 ° C or 70 ° C to about 1.00 ° C or 150 ° C. While increasing the temperature to produce a tight weld is important, the formation of at least low pressure on the welded seam is also important Space required. Basically, however, that is necessary to form a welded connection between two surfaces The higher the applied welding temperature, the lower the pressure.

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It is also important that the thickness or amount of the thermoplastic or fusible layer 13 is chosen so that the thermoplastic layer, the fiber layer 11 at the elevated temperature and application to form the weld seam absorbs the low pressure. The thermoplastic layer is always at least about 25 microns thick, and it can be 50 or 75 or even 125 microns thick. If the thickness is greater than about 125 microns, the thermoplastic Layer 13, on the other hand, causes a higher stiffening of the composite sheet material than is the case for the preferred one Use of the sheet material, namely the manufacture of reversible bag-like containers, is desirable. If the On the other hand, flexibility of the sheet material is not critical, the thickness of the thermoplastic layer can also be up to Micron strong.

The thickness of the fiber layer 11 (which is an open Layer of fibers or threads is) can be even larger than that of the thermoplastic layer 13 and within the Dickenxbereiches lie, the complete immersion of the fiber layer in the thermoplastic layer during welding allowed. The reason for this is to be seen in the fact that the fiber layer has a large amount of free space between the fibers (corresponding to the free space in cheesecloth or the free space in a coarsely woven linen fabric made from non-woven, swirled threads using a "Rondo" weaving process). Their compression therefore eliminates the free spaces, so that the true thickness of the space covered by the Mass of the fibers per se occupied in this is much less than the total thickness of the fiber layer, when attached or attached to the multilayer assembly. In general, the total thickness is the loose or uncompressed fiber layer - as part of the total sheet material - in the range of 25 or 50 microns up to about 200 microns or even 300 microns. A thickness of 500 microns or even a millimeter is in some Cases also suitable. The diameter of the fibers in the

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However, the fiber layer must not exceed the approximate thickness of the thermoplastic layer. For example, a fiber diameter greater than about 75 or 80 microns is impractical, while a diameter below 25 or 30 or even 40 microns down to about one micron is particularly advantageous. Also, the thickness of the fully compressed fiber layer should normally not be greater than about the thickness of the thermoplastic layer, and preferably it is less. However, if the fiber layer is very loose and has wide gaps, the fibers being relatively loosely spaced apart and arbitrarily crossing each other in the entire fiber layer, the molten thermoplastic material can penetrate through the sufficiently free interstices by the application of the pressure during the production of the tight weld seam, and in this case, the fiber layer can be completely immersed in the thermoplastic layer even if the thickness of the fiber layer in the compressed state exceeds the thickness of the thermoplastic layer by about 25%. The reason for this is to be seen in the fact that the material of the thermoplastic layer, when the fibers are immersed therein, is pressed upwards through the free spaces in the fiber layer, so that its thickness increases as the fibers are immersed. For this reason, when using such a fiber layer, care must be taken that the material of the thermoplastic layer penetrates sufficiently far through the fiber layer, namely over the fiber layer, in order to form a good and tight welded joint with a substrate surface applied to it.

With this composite sheet material there is therefore a thermoplastic material within the sheet material covered on both sides by a polyester material. It Other layers in the multilayer arrangement are also permissible, provided that they serve the function of the composite sheet material do not interfere with welding. So z. B. a fragile or dispersible layer of a resin

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or an inorganic material with low cohesive strength (e.g. a vapor-deposited metal layer to form an opacity). The resins in the various Layers of the sheet material can be plasticized in order to improve the flexibility of the layer and in order to The case of the thermoplastic layer to influence its composition in such a way as to also with other temperature and pressure conditions to achieve a tight weld. In this context it should be noted that under "weld" or "Welding" the application of various methods to soften the material to form a tight seam by heating (such as resistance heating, dielectric heating, ultrasonic heating, etc. for local heating of the material) and the application of low pressure should be understood. Furthermore, extremely thin FUIl- or initial layers in a manner known per se to improve the connection between the main layers mentioned can be used, but it is also possible to produce the connection in a chemical manner in a manner known per se.

Another embodiment of the composite sheet that enables relatively strong welds to be formed which are relatively easily separable by a user is that the majority (over 50%, preferably over 60 %) of the weight of the fibers in the fiber layer (in the it is preferably a non-woven layer) make up aligned threads, the length of which is at least about 2 or 3 cm, that is to say is limited at the top only by the length of the sheet material underlay. In this embodiment, the fibers (at least a portion of the fibers making up the predominant part of the weight of the fibers) are oriented so that they extend essentially in the same direction in the fiber layer, being more or less parallel to the multilayer arrangement forming the base body get lost. While they are essentially parallel to the surface of the base body forming

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Multi-layer arrangement extend, they preferably cross each other at relatively acute angles in an arbitrary manner, essentially at these intersection points connected or concatenated or united. (An example of such a polyester fiber layer can be made using manufactured by "Reemay", which is a by Spinning or centrifugally bonded sheet material made of polyester threads by E.I. Dupont acts.) Parts or sections of the aligned threads or fibers are thermoplastic firmly bonded to the thermoplastic layer (which is preferably "Saranex" i.e. polyethylene between outer layers of polyvinylidene chloride). In this way, parallel long filaments (of at least 2 or 3 cm in length).

When using the sheet material for the production of Packaging or packaging containers, the sheet material is placed against one another with the fiber side so that the non-weldable The mooring layer or backing layer is on the outside. Then will tight welds made by any conventional method, with the fiber material in the area the weld seams submerged in the thermoplastic layer. That flowing or seeping through the fiber layer The softened resin combines with the resin that has also seeped through the fiber layer on the opposite side to form Form a tight connection.

A sheet material with aligned fibers is particularly advantageous because of the contact between the surfaces of the fiber sides of the sheet material resulting tight connection or weld seam. Appropriately, to produce such a weld seam composite sheet material first folded so that its contact layer on the outside and the fiber layer lies on the inside. A weld (in the form of a line or a narrow band) about 1 cm wide or

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narrower, is designed so that it is transverse to the longitudinal direction the aligned threads of the opposing fiber layers runs. The weld seam essentially runs perpendicular to the direction of the aligned threads (so that the alignment direction of the threads is approximately perpendicular to the direction the weld runs). Such a weld seam can be made more easily by pulling away sheet material extensions tear open from the weld seam as a weld seam that distributed between sheet materials with completely arbitrary Fibers is formed. This is essentially a consequence of the thread strength and the orientation.

In the following an embodiment of a preferred packaging container according to the invention will be described. To 2 and 3, the bag-like or envelope-like container 15 has opposing walls 16 and 17 flexible sheet material. In the container is the means to be packaged 18 between these walls. The sheet material used can be on the lower edge 19 of the container be folded as shown. Instead, it is also possible to place two separate sheet materials next to one another and weld the lower edge. Lateral weld seams 20 and 21 connect the laterally adjacent Parts of the folded sheet. These side welds 20 and 21 are usually permanent or permanently. The sheet material of the opposing walls of the shell or the container is next to the edges welded in a continuous line, so that there are tight welds between the touching edge parts result. Since the lower edge 19 is formed by folding, there is no: Jcln; e Lil seam required.

That to Ik; vs lei. Lung of this container the sheet material used Weii.it a thermop Las tables layer 22, which is fusible and therefore with the following:.; time in the increased temperature and pressure ratio to the · fUuV ₁ I :. '! 1. Lun ^ a weld is suitable. Furthermore, there weeps; * Fi / ieiioniiimaterial an outer contact layer 23 (also

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Underlay, backing or support layer called) with a fiber-free surface, which "not under these conditions The above-described sheet material is particularly suitable. The thermoplastic or weldable layer lies on the inside of the container.

The sheet material forming the opposing walls 16 and 17 extends so far beyond a weld seam 24 along one edge of the container cavity that it forms two outwardly projecting tabs 25 and 26 which can be grasped with the fingers. One of these tabs or that, the surface material forming the tab 25 is shaped in such a way that the structure and the effect of the tearable, i.e. temporary Affected weld seam 24 along one edge of the cavity.

The flap material forming the flap 25 is inwardly except for its meltable thermoplastic layer 22. Part of the inwardly bent or struck Section extends as a separating part 27 or partition wall essentially over the entire weld seam 24 along one edge. This weld seam 24 is referred to as temporary because it is relatively easy can tear open when the packaged means and possibly the packaging material itself is to be used. These temporary weld is made at the interface between the

non-fusible landing layer 23 of separator 27 (i.e. of the tucked-in part of the flap 25) and the heat-softenable or meltable layer 22 of the opposite Sheet material of the flap 26, which is connected to the separating part 27 in the The area where the temporary weld seam is in contact is torn. The contact points of the thermoplastic layer 22 within the tucked-in part (the flap 25) in the 'area of the temporary weld seam 24 can, however, in the Weld the production of this weld seam firmly and permanently. This is not a disadvantage, but is a conscious effort. These

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Welding promotes separability at the interface to be torn (i.e., the interface at the face of the mooring layer 23 of the separating part 27 and the fusible layer 22 of the sheet material forming the tab 26. Preferably extends the edge of the knocked-in separating part at the end 28 slightly beyond the temporary weld seam 24 inwards into the Cavity of the container or the shell. This end 28 extends inwardly so that it can be used as a protective part or protective flap Over the area of the rupturable, temporary weld, if an inadvertent slight pressure is placed on the Pack is exercised. In doing so, it lies against the inside of the wall 16 and thus protects the area of the tear interface against the pressure of the packaged product, which in the event of unintentional pressing or squeezing of the pack onto the temporary weld is exerted from the inside.

It is also possible to form both tabs 25 and 26 in the same way as the tab 25, i. H. also the tab 26 inwards to strike. In this case the tearing takes place between the non-meltable mooring layer of each separating part of the sheet material in the area of the temporary weld seam. if If this version is selected, the material of the contact layer should have a poor weldability to it later Easy to tear open, or it can be a detachable or weakly adhesive strip or another tearable one Sealing means can be additionally arranged between the adjoining surface parts of the contact layers.

In the case of reversible packing, i. H. Packs, the inside of which is reversible, is the depth of the cavity from the temporary weld seam 24 (perpendicular) measured downwards less than the length of the cavity. Preferably the Depth of the cavity no greater than 2/3 or half the length of the temporary weld or the length of the Cavity. The temporary weld seam preferably has a length of about 5 cm to about 15 or 20 cm in the longitudinal direction of the cavity. There are then cavity depths of about 2 to

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about 8 cm useful.

Containers or packages as shown in FIGS are particularly beneficial in that they are economic can be produced and the effect or function of the temporary weld seam or sealing connection during use is reliable (or uniform or stable). In the formation of permanent or temporary welds you can the same welding conditions can advantageously be maintained regardless of whether an ultrasonic or a dielectric or a conventional hot rod welding process or a corresponding welding process is used. The different Surface properties of the opposite sides of the packaging container forming Sheet material enable permanent, tight weld seams to be formed between parts that have their front sides against one another, and of temporary or tearable weld seams which abut with parts of the back and the front (as if the top of a sheet or part of that material against the bottom of the sheet printed and welded to this). The nature of the mooring layer, which is a non-thermoplastic organic polymeric film with a largely continuous smooth and fiber-free reverse side, under conditions in which the thermoplastic layer on the front or inside of the sheet material fuses, essentially does not fuse, contributes to the formation of the temporary weld seam as surely as the melted thermoplastic Layer that is pressed firmly against it. However, since there are no molten components between the adjoining Surfaces intersect, it is possible to remove the melted layer from the mooring layer to form a sizeable separating surface on both sides of the sheet material in the area of the temporary weld seam. A mechanical one Temporary connection of the adjoining surfaces in the area of the temporary seam, however, is very critical, and therefore, the actual nature of the surface of the

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The contact layer of the sheet material that forms the separating part for the temporary seam can be selected differently or changed, to improve the strength of the seam for handling prior to use of the pack and at the same time the convenient tearability to obtain.

The packaging containers (in particular those whose inside can be turned outwards) preferably have recesses having layer which is fixed in the cavity of the container. Container with a recess having layer can easily be produced by using the sheet material described. One recesses having a layer contributes to a spreadable packaged medium (e.g. a paste or a lubricant) the desired location or partially in limited recesses or openings between parts (such as fibers) from which the layer is formed to hold more or less firmly. The packaged product is therefore "carried" by the layer, so that it can be applied to a surface after the container has been turned inside out by hand.

"Recesses" are intended to include openings such as irregular ones Intermediate spaces with a small cross-section between fiber parts of a layer or distributed impressions or depressions in an inner layer (e.g. the thermoplastic layer) of the sheet material forming the container or openings or through channels in a sponge-like or porous layer or sheet material (e.g. Polyurethane foam or other pab'se plastic materials) be understood. The depressed layer; can vary from the sheet material used to manufacture the container be separate, and it can be (at least partially) secured in the container as an inner tongue-like part. when the welds are formed. This layer preferably extends over and in one piece with the sheet material, from which the packaging container is made. With the The layer having melins and the thermoplastic

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Layer can be one and the same layer of a flat material suitable for the production of packaging containers act. "For example, fiber parts made of thermoplastic material (e.g. polyethylene) can be used to form a thermoplastic layer is used for a sheet material -being from which a packaging container is made. If desired, a mixture of thermoplastic and non-thermoplastic fibers (e.g. glass fibers or nylon fibers) to form a layer with recesses and thermoplastic property can be used. Essentially contains a recessed layer like them can be used for the packaging container described, numerous mini-recesses or mini-depressions. Independent of how the recessed layer is formed become meltable and non-meltable in each case Layers in the specified arrangement relative to one another for the sheet material for producing a bag-like or envelope-like one Used container. The layer having recesses preferably comprises a porous fiber layer (in particular made of non-woven threads, produced by a "Rando" weaving process are made, or a flocked or velouted layer that is on the meltable or thermoplastic side of the sheet material used to make the container is attached.

Reversing a reversible packaging container so that its inside is turned outwards can easily be carried out by hand. After the temporary weld seam has been torn open 2h, e.g. B. by grasping the tabs 25 and 26 between thumb and forefinger and pulling the tabs apart, the shell can be turned inside out in a simple manner by pushing the bottom of the shell through the opening created by tearing the temporary weld. In this way, the packaged product gets on the outside. Then the hand can be inserted into the recess or pocket formed by the turn-up and the packaging container can be used for application and distribution at the same time

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of the compressible agent on a surface without hands come into contact with the smearable agent.

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Claims (15)

Claims 1. Flexible sheet material made of plastic, in particular for the production of a flexible, bag-like packaging container which can be torn open at one edge, characterized in that the sheet material is a polymeric thermoplastic layer (13) made of synthetic resin which is flowable at predetermined elevated temperature and pressure conditions, and a contact layer (12) made of a material which is not flowable at the mentioned temperature = and pressure conditions _p » 2. Sheet material according to claim 1, characterized in that that the material of the application layer (12) is organic Polymer., 3. Flat material according to claim 1 or Z ₉ characterized · == 'characterized in that the material of the contact layer comprises a polyester resin « 4. Sheet material according to one of claims 1 to 3, characterized characterized in that on the side of the thermoplastic layer (13) facing away from the contact layer (12) one preferably Layer (11) having continuous recesses made of a layer (11) with the temperature and pressure conditions mentioned non-flowable material is applied » 5. Sheet material according to claim 4, characterized in that that the recessed layer (11) is a fiber layer made of polyester resin »- 6. A sheet material according to claim 5, characterized in that the thermoplastic layer (13) is thicker than the _check-x put layer (12) firmly adheres the fiber layer (11) on the thermoplastic layer (18) and the quantity ratio of the fiber layer (11) and thermoplastic layer (13) is chosen so that the fiber layer (11) when formed 309819/0747. «*« «. "whom" 2? 5? O 5 9 tion of the temperature and pressure conditions mentioned in the thermoplastic layer (13) is almost completely immersed. 7. Sheet material according to one of claims 1 to 6, characterized in that between the contact layer (12) and the thermoplastic layer (13) an impermeable barrier layer (14) is arranged »which contains a vinylidene Po lyme r on v / ei st » 8. sheet material according to one of claims 1 "to 7» thereby characterized in that the thermoplastic layer (13) contains polyethylene. 9. Sheet material according to one of claims 5 to 8, characterized marked »that the thickness of the * mooring layer (12) between 5 and 60 microns and the thickness of the thermoplastic layer (13) is between about 25 and 300 microns and the Fiber layer (11) is not thicker than about 1 mm. 10. Sheet material according to one of claims 5 to 9 »characterized in that most of the weight of the fiber layer (11) make up aligned fibers that are in substantially the same direction in the fiber layer (11) and extend essentially parallel to the layer arrangement, 11. Sheet material according to one of claims 1 to 10, characterized in that the contact layer (12) is not one thermoplastic film made of an organic polymer. 12} From the sheet material according to one of Claims 1 to 11 Manufactured flexible »bag-like packaging container which has a means to be packaged, characterized in that that the opposing walls (16, 17) of the container (15) forming sheet material arranged in such a way is that the thermoplastic layer (22) is inside 3 0 9 BI 9/07 4 7 - ° * « ^INAL inspected and aii the abutting edges of the walls (16, 17) using the mentioned temperature and pressure conditions tight weld seams (20 _s 21 _s 24) are formed that the sheet material of the walls (16, 17) over the one weld seam (2A) protrudes outward so far that it forms two flaps (25 $ 26) that can be grasped with the fingers, whereby the sheet material of one flap (25) is folded so far inward that there is a separating part (27) between the two walls (16 _S 17 ) forms a weld seam (24) in the area of almost the entire area and this weld seam (24) at the interface between the contact layer (23) of the separating part (27) and the thermoplastic layer (22) of the opposite sheet material by grasping the tabs with the thumb and forefinger and pulling apart is tearable " 13. Container according to claim 12, characterized in that the other welds (20, 21) are permanent and the inside of the container torn open at one weld seam (24) is reversible to the outside, so that it is in a pocket-shaped manner Applicator is convertible to apply the packaged agent directly to a surface. 14. A container according to claim 12, characterized in that the Eatla (£ o) of the separating part (27) over the one weld seam (24) protrudes inward into the container (15) _o 15. Container according to one of claims 12 to 14, using a flat material according to claim 5 »characterized; that the fibers extend transversely to the longitudinal direction of a weld seam. Blank page