DE2054199A1 - Quilted insulating packaging - contg polystyrene bead insulation and possessing flexibility - Google Patents

Abstract

Method for making upholstered packaging material consists of laying a flat sheet of polyethylene on a flat sheet of packing paper, then applying a layer of expanded polystyrene beads over this then superimposing a further polyethylene sheet and a sheet of packing paper, finally, heated dies are pressed onto the composite material, welding all the components together beneath the contact areas. Pref. a revolving heated drum with projections welds the layers together at intervals as they pass beneath it.

Description

Process for the production of a polarized packaging material and devices for performing the method, as well as by means of the same manufactured padded packaging material.

The invention relates to a method for producing an upholstered Packaging material and also devices in various embodiments to carry out the process, as well as by means of the process and these devices manufactured padded packaging material.

There are various methods of manufacturing padded packaging materials known. It is known, for example, on a paper or plastic web or a fabric, a layer made of an insulating material, for example Glue on foam, foam rubber or the like. It is not necessary to that the insulating layer is designed continuously, it can also consist of many Individual parts, for example beads, scrap-like pieces of waste and the like in any form, exist to connect the insulating layer respectively their individual parts with the supporting paper or plastic web in place of the Bonding also occurs welding can.

Furthermore, a method is known that works with foam sheets and in which these foam sheets are arranged between sheets of paper, so that a coherent packaging material results, which however has the disadvantage that it is quite rigid and therefore only made in a relatively thin form which in turn has the disadvantage that its cushioning effect is low. It is of course possible to have this cushioning effect by laying them on top of each other several layers of the upholstery material produced by such a process to increase, which, however, in turn has the disadvantage of increased expenditure on packaging material and work time brings with it.

All known insulation layers made of a coherent material, which are laminated on one or both sides with foils made of paper or plastic and of which various embodiments are known have, in particular if polystyrene is used, the disadvantage is that it is relatively rigid and therefore are not conformable, which considerably limits their range of use is.

In order to obtain a more resilient material it is also known many Similar in size and shape parts made of a Danish material next to each other to be arranged and to glue them to a carrier film or a paper web, wherein however, the individual parts are not glued to one another. As a dampening material Polystyrene beads are known for this. In such a method, it is furthermore known, two webs provided with such a pearl layer with the pearl side against each other, as well as at all several with the pearl layer to attach provided webs one on top of the other in order to obtain a thicker material in this way of increased cushioning effect. One such known method has the Disadvantage that it is relatively expensive to manufacture and also additional an adhesive agent, such as glue, is required through which the individual Beads are connected to the paper or film web.

Furthermore, especially for the production of so-called mailing bags, padded materials known, ei those between two sheets of paper corrugated cardboard or corrugated paper is arranged, which is additionally covered with cellulose or synthetic foam is covered, this cushioning material with the inner shell of the paper web is connected by gluing.

In another known method of making an upholstered Material are made of plastic beads or flakes of various diameters a self-adhesive coating, i.e. a glue, provided and self-adhesive to one another connected to then on any carrier layer, preferably with a rough, corrugated or ribbed surface, self-adhesive to adhere, where it is also known is to apply a cover layer to the self-adhesive beads.

Another known method is to use expanded polystyrene particles placed loosely between two layers of either paper webs or plastic foils, after which these two layers are glued against each other. Even with this procedure there is the disadvantage that an additional material, namely Glue, must be used and that the insulating polystyrene particles can shift, This, however, is due to the additional use of sprayed-on and painted-on adhesive Wet limited in all possible forms between the layers of carrier material can be.

Finally, a method for producing a padded packaging material is known, in which this is designed in the manner of a quilt, with a single one. relatively thin-walled and more flexible M fabric Use is found, which is divided into a plurality of chambers which are completely or partially filled with fibrous materials, for example loose peat waste or the like. In this known method, the production of the individual chambers can be made, for example, by a stitching seam and / or weld seam, in such a way that the chambers are sealed from each other and also from the atmosphere consists of a thermoplastic synthetic material or a paper coated with such synthetic material, the subdivision of this envelope into chambers is made by means of welds. This known method has the disadvantage that in a padded packaging material obtained in this way, both sides have a pattern consisting of depressions, that is, both sides are not smooth, which is when the material obtained by the method described is used, for example, for the production of mailing envelopes for books and the like is to find, leads to inconveniences because the outer side of the cover cannot be inscribed or can only be inscribed inadequately.

The object of the invention is to overcome the disadvantages of the known methods and avoid the end products obtained with them and, using a Number of known starting materials and an equally known welding process, to create a padded packaging material on its one outer surface is flat and smooth and is corrugated on its other outer surface, the two Outer surfaces are double-walled and made of two different materials, namely Wrapping paper and Polyäthylwnfolie exist and furthermore the between the outer layers lying polystyrene balls, which form the elastic padding, loosely divided into sections Chambers are located, but at the same time are secured against significant displacement.

To solve this problem, the invention provides a method that is designed so that on a flat sheet of wrapping paper also one flat sheet of polyethylene film is brought and this then with a layer of foamed polystyrene beads of different or the same size and shape is provided, whereupon another sheet of polyethylene film and on this layer on this another sheet of wrapping paper is brought, and that then on Pieces of all tracks and a number of polystyrene beads by means of a or several heated stamps a pressure is exerted until the pressed parts of all materials are welded together.

The method provides that polyethylene sheets and foamed polystyrene beads Find use that have the same or approximately the same melting point exhibit.

An embodiment of a device for performing the method to a batch production of the end product provides that above one flat base plate a pressing device that can be moved towards and away from it is arranged, which is equipped with at least one heatable stamp.

Another embodiment of a device for performing the method, which provides for a continuous production of the end product is that a roller equipped with heatable punches is provided, and that this Roll a counter-pressure roll is opposite, and that also on one side of this two rollers each with two wrapping paper supply drums and two polyethylene film supply drums each are arranged whose axes are parallel to the axes of the rollers, and that above the level above the upper edge of the counter pressure roller, with mouth on one Rail of the polyethylene film, a pouring device for the polystyrene beads attached which is connected to a storage container for the same, the arrangement is such that, in operation of the device, two of the supply drums are turned toward the stamped roller and two of the supply drums move towards the back pressure roller. Behind the effect of the welding process Rollers, a cutting device can be arranged. Instead of the mentioned Cutting device or in addition to this can be behind the, the welding process causing rollers, a winding drum for the finished end product is arranged be.

That according to the method and one of the devices for exercising the same The end product produced has the characteristics that the one surface of the packaging material flat and its opposite surface is wavy, and that the a layer of the wrapping paper and the polyethylene film lying on it with the opposite Layer of a second polyethylene film and wrapping paper lying on it, as well as one Part of the polystyrene beads on the shaft plates by welding to form a coherent one The whole is connected, with those at the wave troughs or in the vicinity of them polystyrene beads are deformed. The one between two wave troughs The polystyrene beads that make up the actual padding are loose.

In the figures are the method and two embodiments of Devices for performing the method shown schematically and that shows Figure 1 shows the position of the individual packaging materials that will later form the padded packaging material limaterialien before the start of the welding process, seen from the side in section Figure 2 is the same as Figure 1, but with the difference that above the stacked materials that rest on a flat base plate, one on this to and from this movable pressing device with heatable punches is shown schematically, before the start of the welding process, wherein the device shown for a paragraph working manufacturing process Figure 3 serves the pressing device in the lowered state, with its heated Stamp on parts of all materials act Figure 4 another embodiment a device for the continuous production of the upholstered according to the invention Packaging material in a schematic representation in side view.

At the bottom there is a sheet of wrapping paper la on which one another sheet of polyethylene film 2a is. At the top is a sheet of wrapping paper Ib, below which there is a sheet of polyethylene film 2b. The wrapping paper la and the polyethylene film 2a are close to each other and so is the wrapping paper Ib and the polyethylene film 2b. In the space between the polyethylene sheets 2a and 2b there are polystyrene beads 3. All of the materials 1 to 3 mentioned are at rest on a base plate 4, the outer surface of the wrapping paper la rests on this. Above the packaging paper 1b, a pressing device 5 is arranged, which several heatable Has stamp 6 and which, together with stamps 6, move in the direction of arrow 7 can move down and in the direction of arrow 8 upwards. Will the pressing device 5 moved down in the direction of arrow 7, arise at the points where the punches 6 are, wave troughs 9 and on the lines 10 are polystyrene beads 5 pressed together, while a wave crest 11 is formed between two wave troughs 9, what, after finished Welding process through the heated stamp 6 gives the end product 12.

In one embodiment of the method for continuous production of the padded packaging material according to the invention are each below and above a supply drum 13a is provided for the wrapping paper 1a and 13b for the wrapping paper Ib and a supply drum 14a each at the bottom and top for receiving a supply of polyethylene film 2a and 14b to accommodate polyethylene film 2b. Above the The path of the polyethylene film 2a opens into a pouring device 15 which has a storage container 16 is connected, in which a supply of polystyrene beads 3 is located. In some A roller 17 is arranged at a distance from the supply drums 13b and 14b, on which several, preferably electrically heatable, stamps 18 are attached and below this roller 17 is a counter-pressure roller 19, between the shell and the lower surface of the punches 18 is an air gap of a width that can be variable and the respective existing ratios Rn with respect to the material thickness is adapted. The protruding on the right side of the roller 17 and the counter-pressure roller 19 End product 12 can be cut into pieces of any length by means of a cutting device 20 which are then stored on a stacking device 21. Instead of the cutting device 20 and the stacking device 21 can also be a winding drum 22 can be provided for the finished end product 12. When rotating the roller 17 and the Counter-pressure roller 19 move the webs of packaging papers la and 1b and the polyethylene films 2a and 2b in the direction of arrow 23 and also the one on the polyethylene film 2a lying polystyrene beads), with the movement of all these naterialien continually is.

The mode of operation of the two described as exemplary embodiments Apparatus for performing the method is the same with respect to this.

In the first embodiment, as shown in the figures 2 and 3, the materials to be combined to form a final product 12 lie on a base plate 4. The size of this base plate 4 is arbitrary and diofte correspond approximately to the size of the pressing device 5. This pressing device 5 is provided with a number of heatable stamps 6, of which in the figures 2 and 3 only three to explain the method and the device are shown, while in practice both the number and the shape and the position of the stamp to each other from the illustrated embodiment considerably can differ. The side cut through the individually joined one on top of the other Materials is shown in Figures 1 and 2 for the sake of clarity greatly enlarged. Now about the individual materials, i.e. the strips of wrapping paper 1a and polyethylene film 2a and wrapping paper Ib and polyethylene film 2b together to connect, this connection in certain, expediently uniform Intervals should take place, the pressing device in the direction of the iles 7 downwards set in motion. Here, the heated punches 6 press the pressing device 5 first on the wrapping paper 1b and as the downward movement continues also on all other materials, namely the polyethylene film 2b, the polystyrene beads 3, the polyethylene film 2a and finally the wrapping paper 1a. This will make the Materials in the places where the punches 6 act, compressed and in particular, the polystyrene beads 3 are strongly pressed at the above-mentioned locations and deformed. Under the influence of the heat emanating from the punches 6 arises within the two lanes of wrapping paper la and 1b between the polyethylene films 2a and 2b and the foamed polystyrene beads at this point a sticky mass, which in the course of the pressure and heating process becomes an intimate Welding of all materials leads. So in the depressed areas the sheet of packing paper 1b, the sheet of polyethylene film 2b, the foamed polystyrene beads 3, the sheet of polyethylene film 2a and finally the sheet of wrapping paper 1a inseparable connected to each other and form a coherent whole. After finishing this During the process, the pressing device 5 is moved upwards in the direction of arrow 8 and the welded materials can be moved further in the horizontal direction namely by a length which corresponds approximately to the length of the base plate 4, whereupon the process described can be repeated and continued over and over again. the The device sketched in principle in Figures 2 and 3 is therefore used in sections Manufacturing and allows all variants in terms of shape, width and arrangement of the welded Make to.

In the embodiment for performing the method by means of a continuously operating device, as shown in Figure 4, the welding process is exactly the same as with the previous one Embodiment was shown.

The only difference is that they are to be connected to each other Materials not in a stationary but in a moving state with one another be welded. For this purpose, the wrapping paper runs from a supply drum 13a 1a about any guide surface in the direction of arrow 23 and Likewise, the Polyäthyser lenfolie 2a from a supply drum 14a. About a free one Part of the / polyethylene film 2a is a pouring device 15 is arranged with a Storage container 16 is connected, in which the polystyrene beads 3 are, which through the pouring device 15 in a suitable dosage on the polyethylene film 2a, which represents a conveyor belt, so to speak, and on this a loose layer of pearls forms, the strength of which is variable depending on the desired end result. Above the Bead layer are the supply drums 14b for the Polyäthylenfolirn2b and 13b for the wrapping paper Ib arranged. Located above the webs of the mentioned materials a roller 17, which in any way continuously via a gear motor, which is not shown in the figures, is driven. This roller 17 is equipped with a number of heatable stamps 18, the spacings of these Stamp 18 are chosen to each other so that they are the desired distance later the wave troughs 9 correspond. The heated stamp 18 are for example by an electrical resistance heater, not shown in the figure, to the brought the required temperature. Under the roller 17 there is a counter-pressure roller 19 and between the two rollers when the roller 17 is driven, the materials slide through which process they, as already described, with each other be welded. So there is a continuous welding process, one wave trough 9 after the other being embossed and between these wave troughs 9 then the wave crests 11 arise, which are not affected by the heat, undamaged Polystyrene beads 3 remain filled. At some distance from the roller 17 can be a Cutting device 20 may be arranged, which is displaceable appropriate can be to larger or smaller pieces of the finished product 12 to obtained, which are then collected on a stacking device 21 and stacked one on top of the other can be.

It is also provided instead of the cutting device 20 and of the stacking device 21 to arrange a winding drum 22 behind the roller 19, if one wants to win a long band of the end product 12.

The end result achievable with both devices described is the same. In any case, a number of the polystyrene beads 3 are deformed, produces a sticky mass under the influence of heat and welds in this way the materials together.

It is essential that the foamed polystyrene beads 3 and the polyethylene films 2a and 2b have approximately the same melting point. The end product 12 has after completion of the manufacturing process, a smooth and level outer surface, while the opposite outer surface of wave troughs 9 and wave crests 11 consists, with the wave crests 11 as a result of the polystyrene beads loosely lying in them 3 form the actual cushion.

The advantages of the method according to the invention are primarily in that it is possible to obtain an end product that is smooth on the one hand and is flat and wavy on the other. This brings in for further processing considerable advantages with it, because, for example, the flat surface is slightly printed or can be labeled. Another advantage of the method according to the invention lies in the fact that the use of additional adhesive agents so for example glue, is completely eliminated. It is also advantageous that the polystyrene beads remain unconnected with each other, whereby they retain their full elasticity. It is also advantageous that with only two layers of wrapping paper and two layers Polyethylene film any desired thickness of the upholstery by more or less superimposed Polystyrene beads can be achieved. The advantages mentioned bring a strong one Reduction of the technical effort and. the advantage of eliminating an additional Adhesive means with itself, in addition, that the strength and shape of the polystyrene beads in the method according to the invention is not tied to certain sizes. In the end it is advantageous that the method allows the polystyrene beads to to pour the edge of the wrapping paper so that there is always enough during the melting process Mass is available together with the polyethylene sheets.

The method according to the invention and the embodiments of the devices to carry out this procedure are not limited to those in the description and the illustrations available. It is of course possible to arrange the heatable stamps and at unequal distances from one another to give them any shape you want, thereby also giving you any blanket pattern you want is possible.

It is always only essential that one side of the end product is just that and is smooth, while its opposite side is wavy and that this one State due to simultaneous or short successive pressing and melting processes is achieved. It should also be mentioned that in the method described, the webs lying between the wrapping paper webs made of polyethylene foils design the end product so that the objects to be packaged in this in each Case are protected against the effects of moisture coming from outside. That through the pattern resulting from the welding causes tension in one of the polyethylene sheets and one layer of wrapping paper. Through this tension, those who are unconnected with one another become Polystyrene beads, which represent the actual upholstery, in their places held.

Claims (8)

Patent claims: (1 process for the production of a padded packaging material, characterized in that on a flat web of wrapping paper (1a) a also flat web of polyethylene film (2a) is brought and this then with a layer of foamed polystyrene beads (3) of different or the same size and shape is provided, whereupon another web on this layer made of polyethylene film (2b) and placed on this another strip of wrapping paper (1b) will, and that then on sections of all tracks and a number of Polystyrene beads (3) by means of one or more heated stamps (3 or 18) Pressure is exerted until the pressed parts of all materials (Ib, 2b, 3, 2a, la) are welded together. 2) Method according to claim l, characterized in that polyethylene films (2a and 2b) and foamed polystyrene beads (3) use the same or have approximately the same melting point. 3) Device for performing the method according to claims 1 and 2 for batch production of the end product, characterized in that above a flat base plate (4) which can be moved towards and away from it Pressing device (5) is arranged with at least one heatable punch (6) is equipped. 4) Device for performing the method according to claims 1 and 2 for the continuous production of the end product, characterized in that a roller (17) equipped with heatable punches (18) is provided, and that this roller (17) is opposed to a counter-pressure roller (19), and that further on one side of these two rollers (17 and 19) each have two wrapping paper supply drums (13a and 13b) and two polyethylene film supply drums (14a and 14b) each are, the axes of which are parallel to the axes of the rollers (17 and 19), and that above the level above the upper edge of the counter-pressure roller (19), with mouth on a sheet of polyethylene film (2a), a pouring device (15) for the polystyrene beads (3) is attached, which is connected to a storage container (16) for the same, whereby the arrangement can be made so that, when operating the device, two of the supply drums (1Db and 14b) move in the direction of those provided with stamps (18) Roller (17) and two of the supply drums (13a and 14a) move in the direction of the counter-pressure roller (19) move. 5) Device according to claim g 4, characterized in that behind the rollers (17 and 19) causing the welding process, a cutting device (20) and a stacking device (21) for the finished end product (12) are. 6) Device according to claim 4, characterized in that behind the rollers (17 and 19) causing the welding process, a winding drum (22) is arranged for the finished end product (12). 7) According to the method according to claims 1 and 2 and one of the devices according to claim 3 or claims 4 to 6 End product in the form of a padded packaging material, characterized in that that one outer surface (corresponding to la) of the end product (12) is flat and its opposite Outer surface (corresponding to lb) is wave-shaped, and that the one position of the Wrapping paper (la) and the polyethylene film (2a) lying on it with the opposite Position of a second polyethylene film (2b) and the wrapping paper (Ib) on it, and part of the polystyrene beads (3) on the wave troughs (9) by welding is connected to a coherent whole, with the at the wave troughs (9) or in the vicinity of the same polystyrene beads (3) are deformed. 8) end product according to claim 7, characterized in that the between two wave troughs (9) located polystyrene beads (3), which the actual Form padding, lie loosely. L e r s e i t e