DE102005018343A1 - Film packaging, in particular foil bags - Google Patents

Abstract

Foil packaging, in particular foil pouch (10), with a cap closure (13, 20) which is arranged on the top side and comprises a pouring tube (13) and optionally a standing floor. The Ausgußröhrchen (13) has a funnel-shaped or cone-shaped sealing portion (19) to which the packaging film is attachable.

Description

The The present invention relates to a film package, in particular Foil bag, with a head end arranged, a spout comprising Caps lock, and optionally a standing floor.

Such packaging, in particular tubular bag of this type are well known. They are mainly used to absorb liquid or flowable products such as liquid soap or hair shampoo or the like. They are comfortable and practical to handle. After opening the cap closure, the products can be squeezed out of the packaging by simply pressing on the packaging. For example only, in this context, on tubular film bag according to the DE 202 12 251 U1 and EP 1 362 797 A2 , which refer in each case to the applicant, referenced.

Usually comprises the spout tube relatively massive connection element with a triangular Cross section, i. a cross section through two symmetrical oppositely directed circular arcs is formed. The circular arch walls serve for sealing the packaging film. The circular arch walls extend parallel to the longitudinal axis of the spout.

Problematic in the latter construction is on the one hand in comparison relative to the actual spout tube high volume connecting element with the result that the Cost of materials for Spout and connecting element is relatively high. About that In addition, they hinder approximately parallel to the longitudinal axis of the spout extending circular arc walls a lateral bulging of the packaging walls. The transition between the circular arc walls of the connecting element and the seal-free packaging wall is in the prior art relatively abrupt with the result that in this transitional area high voltages act on the packing wall. When using Composite films with aluminum barrier layers can break them to lead. Under heavy load, especially dynamic load during the This can even cause leaks in the sealing area between transports Packaging film and connection element to lead.

Of the The present invention is therefore based on the object, a film package, In particular to provide a foil pouch, the or through a substantially wrinkle-free, bulbous transition between the bag body and Cap closure on the one hand and a material-saving closure construction on the other distinguished.

These The object is achieved by the characterizing features of claim 1, wherein advantageous developments and structural details are described in the subclaims.

One It is therefore an essential point of the present invention to that this Spout tube one funnel-shaped or cone-shaped Section has, to which the packaging film is attachable. Through the funnel-shaped or cone-shaped Sealing section instead of the relatively massive connection element With a lower cost of materials a smooth transition between spout is on the one hand and bag body reached on the other hand. The bag body remains practically until Spout also in the area of the same bulbous and thus around the spout around wrinkle-free. Accordingly tension-free is the bag material with the result that too at high dynamic load there is no risk of breakage, in particular also not the risk of breakage of a metallic barrier layer.

Of the funnel-shaped or cone-shaped Sealing section is relatively thin-walled. The wall thickness of the cone section is about 30 to 50% less than the wall thickness of Ausgußröhrchens. Nevertheless, sufficient stability is ensured, in particular if the cone-shaped Sealing portion formed in cross-section circular or elliptical is.

at a preferred embodiment if the packaging is closed on the head side by a top seal, between which the funnel or cone-shaped sealing portion of the Ausgußröhrchens is sealed. The sealed connection is either a heat seal or ultrasonic sealing compound.

at a further preferred embodiment is between spout and Sealing portion an annular disc-like peripheral flange as a transport bracket and / or stop for Sealing tools, in particular ultrasonic sealing tools formed.

Preferably, two fins are formed on the cone-shaped sealing portion diametrically to the longitudinal axis thereof, which are sealed in the finished packaging within the top seam, thus extending in the longitudinal direction of the top seam. The two fins are preferably very thin-walled. They have a wall thickness which may even be less than the wall thickness of the film material for the bag body. This is a particularly tight connection of the top seam on the cone achieved shaped seal section. Also, the strength of the bag is increased in this area, it must be remembered that there are always critical areas in transition areas between the bag film and sealed spouts in terms of stability and tightness.

The Packaging can be tube-shaped formed and at least in the head area diametrically to the packaging longitudinal axis each retracted to form a W-fold (gusset) inward or be wound. The mentioned W-fold (gusset) is then preferably in the region of the top seam fixed by mutual sealing.

below becomes an embodiment a packaging according to the invention with the attached Drawing closer explains where this shows in:

1 the head portion of an inventively designed packaging (foil bag) in a perspective view;

2 the top of the packaging according to 1 in narrow side view according to arrow II in 1 ;

3 a view accordingly 2 showing the action of ultrasonic sealing tools; and

4 the head portion of a conventional foil bag in perspective view accordingly 1 ,

The in 4 illustrated head portion of a conventionally formed film tube bag 10 is through a top seal 11 on the one hand and two in 4 not shown set diametrically to the bag longitudinal axis 12 trained W-folds or -Zwickel marked. The also not shown here bottom of the film tube bag 10 can be designed as a standing floor. Just as well, however, is a bottom seam according to the top seal 11 conceivable. In this regard, reference is made to previously known embodiments of a floor, for example as in the EP 1 362 797 A2 described.

On the head side is a spout 13 sealed, which can be closed with a screw cap, not shown. This spout has a relatively solid, triangular connecting element 14 on, whose cross section is formed by two symmetrically oppositely directed circular arcs. At the circular arc walls 15 , which are parallel to the bag longitudinal axis 12 extend, the bag film is sealed, while continuing the top seam 11 , Due to the orientation of the circular arc walls 15 parallel to the bag longitudinal axis 12 arises when the bag is filled immediately following the circular arch walls 15 each a relatively large dent 16 Move away from the spout tube gradually into a stomach 17 passes. Also form in the area between the dent 16 and the head seam 11 wrinkles 18 from which suffers the strength or stability of the bag material, especially under dynamic load during transport.

In order to avoid these problems, according to the embodiment 1 and 2 provided that the spout 13 a funnel-shaped or cone-shaped sealing section 19 has, to which the packaging film is attachable. Again, the packaging is on the head side by a top seal 11 closed, being between this top seal 11 the cone-shaped seal section 19 is sealed. The sealing of the conical seal section 19 takes place in a similar manner as the sealing of the connecting element 14 according to 4 , The spout is still a cap, in particular screw cap 20 assigned. These and the spout 13 define with it a cap closure. The cone-shaped seal section 19 is circular in cross section. However, it may as well be oval or elliptical. Alternatively, the cross section may also be formed in a triangular manner. Between the spout 13 and the cone-shaped seal portion 19 is an annular disc-like peripheral flange 21 arranged. This serves as a transport holder and / or stop for sealing tools, in particular ultrasonic sealing jaws 22 . 23 according to 3 pointing in the direction of the double arrows 24 below the peripheral flange 21 to the cone-shaped seal section 19 can be moved and moved away from this again, and for the purpose of sealing the packaging film to the cone-shaped sealing portion 19 below the peripheral flange 21 , Between sealed jaws 22 . 23 and peripheral flange 21 can still be provided a thermal insulation, if it is the sealing jaws 22 . 23 is about heat seal baking. Thus, both serving as a transport holder peripheral flange 21 as well as the spout 13 protected from excessive heat.

The cone-shaped seal section 19 has the additional advantage that when sealing between the jaws 22 . 23 a kind of self-centering of the spout assembly takes place. In this respect, the cone-shaped seal section 19 also manufacture an advantageous solution.

As already mentioned, the wall thickness of the cone-shaped sealing portion 19 significantly lower than the wall thickness of the spout Chen 13 , in particular by about 30 to 50% less. Despite this lower wall thickness, a sufficiently high stability is achieved in the connection between the bag body and the pouring device. Compared to the prior art according to 4 In the described embodiment, considerably less material is used for the pouring device.

To increase the stability of the seal between the bag film and the pouring device, in particular conical sealing section 19 , The latter has two diametrically to the longitudinal axis 12 molded fins 25 . 26 on. These are how 1 as well as 2 can be seen in the finished packaging within the top seam 11 sealed.

The packaging is preferably tubular and at least in the head region diametrically to the packaging longitudinal axis 12 each with the formation of a W-fold (gusset 27 ) retracted or wound inwards. The W-fold or gusset 27 is in the area of the top seam 11 fixed by mutual sealing. The latter construction is in 1 indicated.

Furthermore, lets 1 recognize that the bag body immediately following the cone-shaped sealing portion 19 bulged outward. There are no inward dents. Also, no wrinkles are corresponding to the wrinkles 18 to fear. This gives a high filling volume without overstressing the bag film. The risk of foil breakage or fracture of at least one metallic barrier layer is considerably lower than in the prior art. Due to the smooth transition between the bag film and spout there is also no risk of leaks or material fatigue.

by virtue of the bulbous shape of the bag can be down to the top seal the bag after aseptic treatment again completely and residue-free Drain.

• – höhere Stabilität
• – mehr Volumen
• – faltenfreier Beutelkörper
• – Formschönheit
• – geringere Bruchgefahr und geringere Gefahr der Entstehung von Undichtigkeiten.

The inventively designed container, in particular tubular bag, so characterized by

• - higher stability
• - more volume
• - wrinkle-free bag body
• - beauty of form
• - Lower risk of breakage and less risk of leaks.

All Features disclosed in the application documents are considered to be essential to the invention as far as they are individually or in combination with respect to State of the art are new.

10

Flexible tubular bag

11

Top sealing seam

12

bag longitudinal axis

13

Ausgußröhrchen

14

connecting element

15

Arc wall

16

dent

17

belly

18

wrinkles

19

cone-shaped seal section

20

screw cap

21

circumferential flange

22

sealing jaw

23

sealing jaw

24

double arrow

25

fin

26

fin

27

gore (W-fold)

Claims (8)

Film packaging, in particular foil bags ( 10 ), with a head end arranged, a spout ( 13 ) comprehensive cap closure ( 13 . 20 ), and optionally a standing floor, characterized in that the spout ( 13 ) a funnel-shaped or cone-shaped sealing section ( 19 ), to which the packaging film is attachable. Packaging according to claim 1, characterized in that it is provided on the head side by a top-seal seam ( 11 ) is closed, between this top seal ( 11 ) the cone-shaped sealing section ( 19 ) is sealed. Packaging according to claim 1 or 2, characterized in that the cone-shaped sealing portion ( 19 ) is formed in cross-section circular, elliptical or triangular. Packaging according to one of claims 1 to 3, characterized in that between spout ( 13 ) and cone-shaped seal section ( 19 ) an annular disc-like peripheral flange ( 21 ) as a transport holder and / or stop for sealing tools ( 22 . 23 ) is trained. Packaging according to one of claims 1 to 4, characterized in that the wall thickness of the cone-shaped sealing portion ( 19 ) is less than the wall thickness of the spout ( 13 ), in particular by about 30 to 50% less. Packaging according to one of claims 1 to 5, characterized in that on the cone-shaped sealing portion ( 19 ) diametrically to the longitudinal axis ( 12 ) of the same two fins ( 25 . 26 ) are formed, the in the finished package inside the top seam ( 11 ) are sealed. Packaging according to one of claims 1 to 6, characterized in that it is tubular and at least in the head region diametrically to the longitudinal axis of the packaging ( 12 ) each to form a W-fold (gusset 27 ) is retracted or wound inwards. Packaging according to claim 7, characterized in that the W-fold (gusset 27 ) in the area of the top seam ( 11 ) is fixed by mutual sealing.