APPARATUS FOR APPLYING A STRIP COMPRISING A MICROCREPED PAPER

Abstract

Apparatus for applying a strip P comprising at least one microcreped paper to a carrier material T, where the apparatus comprises the strip P, wound to a reel S, and rotatably mounted rollers R.sub.1, R.sub.2 and R.sub.3 for guiding the strip P at least partly unwound from the reel, where the at least one microcreped paper comprised in the strip P wound to the reel has a tensile strength of at least 8 kN/m, an extensibility of at least 4% and a tearing resistance of at least 1200 mN.

Claims

1. An apparatus for applying a strip P comprising at least one microcreped paper to a carrier material T, where the strip P has an areal extent with a length l, a width b and a thickness d where l>>b>d, where the apparatus comprises: (I) the strip P comprising a microcreped paper and wound to a reel S, where the reel S is mounted rotatably about a reel axis A.sub.S; (II) rotatably mounted rollers R.sub.1, R.sub.2 and R.sub.3 for guiding the strip P at least partly unwound from the reel, where the roller R.sub.1 is downstream of the reel S, the roller R.sub.2 is downstream of the roller R.sub.1, and the roller R.sub.3 is downstream of the roller R.sub.2; where (II.1) the roller R.sub.1 has a rotational axis A.sub.1, where the angle α.sub.1 between the rotational axis A.sub.1 and the reel axis A.sub.S is 0°, with a tolerance of ±5°; (II.2) the roller R.sub.2 has a rotational axis A.sub.2, where the angle α.sub.2 between the rotational axis A.sub.2 and the reel axis A.sub.S is 0°, with a tolerance of ±10°; (II.3) the roller R.sub.3 has a rotational axis A.sub.3, where the angle α.sub.3 between the rotational axis A.sub.3 and the rotational axis A.sub.2 is 90°, with a tolerance of ±1°; (III) at least one application apparatus V, downstream of the roller R.sub.3, for applying the strip P to the carrier material T; where the at least one microcreped paper comprised in the strip P wound to the reel has the following properties: (a) a tensile strength F.sub.Z in at least one direction within the areal extent of the strip P, where F.sub.Z≥8 kN/m, determined according to ISO 1924-3; (b) an extensibility F.sub.D in at least one direction within the areal extent of the strip P, where F.sub.D≥4%, determined according to ISO 1924-3; (c) a tearing resistance F.sub.R in at least one direction within the areal extent of the strip P, where F.sub.R≥1200 mN, determined according to ISO 1974.

2. The apparatus according to claim 1, where 8 kN/m≤F.sub.Z≤22 kN/m, where 4%≤F.sub.D≤16%, and where 1200 mN≤F.sub.R≤4500 mN.

3. The apparatus according to claim 1, where the rollers R.sub.1, R.sub.2 and R.sub.3 are cylindrical rollers.

4. The apparatus according to claim 1, where the roller R.sub.3 is arranged in such a way that in the guiding of the strip P, the first contact point between the strip P and the roller R.sub.3 lies in the plane of an end face of the reel S or is arranged at a distance from this plane in a direction away from the reel S.

5. The apparatus according to claim 1, where the rotational axis A.sub.1 of the roller R.sub.1 is positioned movably in space in such a way that during the unwinding of the strip P the roller R.sub.1 contacts the reel S, where during the unwinding of the strip P the rotational axis A.sub.1 of the roller R.sub.1 performs a movement in a radial direction to the reel axis A.sub.S.

6. The apparatus according to claim 1, where the rotational axes A.sub.1 and A.sub.2 are arranged in such a way that the free length of the strip P between the roller R.sub.1 and the roller R.sub.2 is in the range from 150 to 500 mm, and where the rotational axes A.sub.2 and A.sub.3 are arranged in such a way that the free length of the strip P between the roller R.sub.2 and the roller R.sub.3 is in the range from 150 to 300 mm.

7. The apparatus according to claim 1, in accordance with (II) additionally comprising a rotatably mounted roller R.sub.4 for guiding the strip P at least partly unwound from the reel S, where the roller R.sub.4 is downstream of the roller R.sub.3, where (II.4) the roller R.sub.4 has a rotational axis A.sub.4, where the angle α.sub.4 between the rotational axis A.sub.4 and the rotational axis A.sub.3 is 90°, with a tolerance of ±1°.

8. The apparatus according to claim 1, where the apparatus additionally comprises at least one bond application apparatus K for applying at least one bonding layer.

9. A method for applying a strip P comprising at least one microcreped paper to a carrier material T, where the method comprises the following steps: a) providing the apparatus according to claim 1; b) providing the at least one carrier material T; c) guiding the strip P from the reel S to the application apparatus V via the at least three rollers R.sub.1, R.sub.2 and R.sub.3; d) applying the strip P on the carrier material T by means of the application apparatus V.

10. The method according to claim 9, where the method further comprises a step e) preceding step d), of e) providing a bond application apparatus K for applying at least one bonding layer and applying the bonding layer to the carrier material T by means of the bond application apparatus K.

11. The apparatus according to claim 2, where 10 kN/m≤F.sub.Z≤21 kN/m, where 8%≤F.sub.D≤15%, and where 1500 mN≤F.sub.R≤4000 mN.

12. The apparatus according to claim 2, where 13 kN/m≤F.sub.Z≤20 kN/m and where 2000 mN≤F.sub.R≤3500 mN.

13. The apparatus according to claim 3, where at least one of the rollers R.sub.1, R.sub.2 and R.sub.3 are substantially flange-free on at least one side.

14. The apparatus according to claim 3, where at least one of the rollers R.sub.1, R.sub.2 and R.sub.3 are substantially flange-free on both sides.

15. The apparatus according to claim 3, where all the rollers R.sub.1, R.sub.2 and R.sub.3 are substantially flange-free on at least one side.

16. The apparatus according to claim 3, where all the rollers R.sub.1, R.sub.2 and R.sub.3 are substantially flange-free on both sides.

17. The apparatus according to claim 1, where the rotational axes A.sub.1 and A.sub.2 are arranged in such a way that the free length of the strip P between the roller R.sub.1 and the roller R.sub.2 is in the range from 200 to 300 mm, and where the rotational axes A.sub.2 and A.sub.3 are arranged in such a way that the free length of the strip P between the roller R.sub.2 and the roller R.sub.3 is in the range from 200 to 250 mm.

18. The apparatus according to claim 8, where the apparatus additionally comprises at least one separating unit for separating off lengths of the strip P.

19. The apparatus according to claim 8, where the apparatus additionally comprises at least one drive unit for driving the strip P and at least one braking unit for braking the strip P.

Description

BRIEF DESCRIPTION OF THE FIGURES

[0169] Further details and features of the present invention are evident from the description of exemplary embodiments. In these embodiments the respective features may be actualized alone or multiply in combination with one another. The invention is not confined to the exemplary embodiments. The exemplary embodiments are represented schematically in the figures. Identical reference numerals in the individual figures here denote identical or functionally identical elements or elements which correspond to one another in terms of their function.

[0170] Specifically:

[0171] FIGS. 1 to 3 show different exemplary embodiments of an apparatus for applying a strip P comprising a microcreped paper to a carrier material T, in side view (FIGS. 1 and 3) and also in perspective view (FIG. 2).

DESCRIPTION OF THE EXEMPLARY EMBODIMENTS

[0172] The figures are described in common. FIGS. 1 to 3 show different exemplary embodiments of an apparatus 110 for applying a strip P 112 comprising a microcreped paper to a carrier material T 114, in a side view (FIGS. 1 and 3) and also in perspective view (FIG. 2). The carrier material 114 is not part of the apparatus 110 and is therefore shown illustratively in FIGS. 1 and 3 by means of dashed lines. The strip 112 has an areal extent with a length l, a width b and a thickness d, where: l>>b>d.

[0173] The apparatus 110 comprises the strip 112 comprising the microcreped paper, which is wound to a reel S 116, the reel 116 being mounted rotatably about a reel axis A.sub.S 117. The reel 116 preferably has a length L in the direction of the reel axis A.sub.S 117 of not more than 310 mm and a diameter D of not more than 500 mm. The apparatus 110 further comprises three rotatably mounted rollers R.sub.1 118, R.sub.2 120 and R.sub.3 122 for guiding the strip 112 unwound at least partly from the reel 116, with a movement direction of the strip 112 being illustrated in the figures by arrows. The roller R.sub.1 118 is downstream of the reel 116, the roller R.sub.2 120 downstream of the roller R.sub.1 118, and the roller R.sub.3 122 downstream of the roller R.sub.2. The roller R.sub.1 118 has a rotational axis A.sub.1 124, with the angle α.sub.1 between the rotational axis A.sub.1 and reel axis A.sub.S being 0° with a tolerance of ±5°. The rotational axis A.sub.1 124 and the reel axis A.sub.S 117 are preferably oriented in parallel to one another, for example along the z-axis of the Cartesian coordinate system represented illustratively in the figures. The roller R.sub.2 120 has a rotational axis A.sub.2 126, the angle α.sub.2 between the rotational axis A.sub.2 and reel axis A.sub.S being 0° with a tolerance of ±10°. The rotational axis A.sub.2 126 and the reel axis A.sub.S 117 are preferably oriented in parallel to one another, for example likewise along the z-axis of the Cartesian coordinate system represented. The roller R.sub.3 122 has a rotational axis A.sub.3 128, the angle α.sub.3 between the rotational axis A.sub.3 and rotational axis A.sub.2 126 of the roller R.sub.2 being 90° with a tolerance of ±1°. The rotational axis A.sub.3 128 and the rotational axis A.sub.2 126 are preferably oriented orthogonally to one another, for example along the x-axis and the z-axis of the Cartesian coordinate system represented in FIG. 1, or along the x-axis and the z-axis as shown illustratively in FIGS. 2 and 3.

[0174] The roller R.sub.3 122 is preferably disposed in such a way that in the guiding of the strip 112, a first contact point 129 between the strip 112 and roller R.sub.3 122 is in the same plane as an end face 131 of the reel 116, for example in order to convert a back-and-forth movement of the strip 112 induced by the unwinding of the strip 112 from the reel 116, for example a zig-zag movement along the z-axis of the coordinate system shown in the figures, into a stable linear movement.

[0175] The apparatus 110 additionally comprises at least one application apparatus V 130 for applying the strip 112 to the carrier material 114. The application apparatus 130 is preferably set up to exert at least one force in a direction toward the carrier material 114 on the strip 112; this force is depicted illustratively in FIG. 3 by means of an arrow.

[0176] As shown illustratively in FIG. 2, the apparatus preferably further comprises at least one housing 132 for the spatial securement of the reel 116 and also of the rollers R.sub.1 118, R.sub.2 120 and R.sub.3 122. Here, the roller R.sub.1 118 is preferably secured in such a way that the roller R.sub.1 118 linearly contacts the reel 116 during the unwinding of the strip 112. For this purpose, further, the rotational axis A.sub.1 124 may preferably perform a spatial movement in a radial direction towards the reel axis 117. With further preference, as depicted illustratively in FIG. 2, a securing of the roller R.sub.1 118 in this way may be realized by means of two spring elements 134 and a groove 136 disposed in the housing 132. Other forms of securement as well, not shown here but familiar to the skilled person, are possible, examples being alternative mechanical and/or hydraulic and also electronic positional adaptations.

[0177] The apparatus 110 additionally preferably comprises at least one further cylindrical roller R.sub.4 137, the roller R.sub.4 137 being mounted rotatably about a rotational axis 138 and being positioned downstream of the roller R.sub.3 122. Preferably the rollers R.sub.1 118, R.sub.2 120, R.sub.3 122 and also the roller R.sub.4 137 of the apparatus 110 are passive, drive-free rollers, which are placed into rotation via a take-off of the strip 112. In FIG. 3, the take-off of the strip 112 is depicted illustratively by an arrow in negative y-direction at the right-hand margin of the figure, beneath the carrier material 114. The take-off may be generated, for example, by a movement of the carrier material 114.

[0178] The apparatus 110 additionally preferably comprises a bond application apparatus 140 for applying adhesive 142, preferably solvent-free adhesive, to the carrier material 114. The apparatus 110 additionally preferably comprises a separating unit 144 for separating off lengths of the strip 112. The apparatus 110 is used preferably for producing tear strips 146.

LIST OF REFERENCE NUMERALS

[0179] 110 Apparatus [0180] 112 Strip P [0181] 114 Carrier material T [0182] 116 Reel S [0183] 117 Reel axis A.sub.S [0184] 118 Roller R.sub.1 [0185] 120 Roller R.sub.2 [0186] 122 Roller R.sub.3 [0187] 124 Rotational axis A.sub.1 [0188] 126 Rotational axis A.sub.2 [0189] 128 Rotational axis A.sub.3 [0190] 129 Contact point [0191] 130 Application apparatus V [0192] 131 End face [0193] 132 Housing [0194] 134 Spring element [0195] 136 Groove [0196] 137 Roller R.sub.4 [0197] 138 Rotational axis A.sub.4 [0198] 140 Bond application apparatus K [0199] 142 Adhesive [0200] 144 Separating unit [0201] 146 Tear strip