DISPENSER CONTAINER AND METHOD FOR PRODUCING A DISPENSER CONTAINER

Abstract

Manufacturing techniques are provided for dispenser containers. An external container is formed from a dimensionally stable material. A preform is provided that has a cup-like molded body constructed from at least two portions. A first portion is made of a blow moldable elastic plastic that is intended for the formation of an internal-container body. A second portion is made of a dimensionally stable plastic for the formation of an internal-container dispensing portion. The second portion has on its outer surface a slot-like recess to provide a vent duct. The preform is heated thereby introducing the preform into the external container and introducing a stretch blow molding pin into the preform. The blow molding is stretched in order to form an internal container with expulsion of the air contained in the space located between the preform and the external container such that the air escapes into the environment via the vent duct.

Claims

1. A method for producing a dispenser container comprising the following steps: a) Providing an outer container comprised of a dimensionally stable material, wherein the outer container has an outer container bottom, an outer container body and an outer container nipple with an outer container opening, b) Providing a preform, wherein the preform has a cup-like molded body, wherein the molded body is constructed from at least two portions, wherein a first portion forms a closed end of the molded body and a second portion forms an open end of the molded body, wherein the closed end lies opposite the open end, wherein the first portion (21.6) is provided to form an inner container body, and the second portion to form an inner container dispersing portion having a dispersing opening, wherein the first portion consists of a blow-moldable elastic plastic, wherein the second portion consists of a dimensionally stable plastic, wherein the second portion has a slot-like recess on its outer surface to form a vent duct, c) Heating the preform, d) Introducing the preform into the outer container and introducing a stretch blow molding pin into the preform, wherein the stretch blow molding pin is introduced into the preform before or after the preform is introduced into the outer container, e) Stretch blow molding to form an inner container while expelling the air contained in the space located between the preform and the outer container, wherein the air escapes into the environment via the at least one vent duct.

2. The method for producing a dispenser container according to claim 1, characterized in that stretch blow molding is carried out in step e) until the outer surface of the inner container body is in contact with the inner surface of the outer container over at least 90%, preferably over at least 99%, of the expansion of the outer container bottom.

3. The method for producing a dispenser container according to claim 1, characterized in that stretch blow molding in step e) takes place until the outer surface of the inner container body is in contact with the inner surface of the outer container over at least 90%, preferably over at least 99%, of the expansion of the outer container body.

4. The method for producing a dispenser container according to claim 1, characterized in that the outer container prepared in step a) has an outer container bottom, an outer container body, an outer container nipple and an outer container shoulder, wherein stretch blow molding in step e) takes place until the outer surface of the inner container body is in contact with the inner surface of the outer container over at least 90%, preferably over at least 99%, of the expansion of the outer container shoulder.

5. A dispenser container having an outer container and an inner container arranged inside of the outer container for holding a filler material, wherein the outer container has an outer container bottom, an outer container body and an outer container nipple having an outer container opening, wherein the outer container is comprised of a dimensionally stable material, wherein the inner container has an inner container body arranged in the area of the outer container body and an inner container dispensing portion having a dispensing opening arranged in the area of the outer container nipple, wherein the inner container dispensing portion extends in the direction of a dispenser container longitudinal axis over the entire expansion of the outer container nipple, wherein the inner container body consists of a blow-molded elastic plastic, and the inner container dispensing portion consists of a dimensionally stable plastic, wherein the surface of the inner container dispensing portion facing the outer container nipple has at least one slot-like recess for forming a vent duct, wherein the vent duct forms a fluid connection between the environment and a space located between the inner container and the outer container, wherein an outer surface of the inner container body-is in contact with an inner surface of the outer container over at least 90% of the expansion of the outer container bottom.

6. The dispenser container according to claim 5, characterized in that the outer surface of the inner container body is in contact with the inner surface of the outer container over at least 99% of the expansion of the outer container bottom.

7. The dispenser container according to claim 5, characterized in that the outer surface of the inner container body is in contact with the inner surface of the outer container over at least 90%, preferably over at least 99%, of the expansion of the outer container body.

8. The dispenser container according to ene of claim 5, characterized in that the outer container has an outer container bottom, an outer container body, an outer container nipple and an outer container shoulder, wherein the outer surface of the inner container body is in contact with the inner surface of the outer container over at least 90%, preferably over at least 99%, of the expansion of the outer container shoulder.

9. The dispenser container according to claim 5, characterized in that the inner container dispensing portion has a continuous collar portion in an area adjacent to the dispensing opening, wherein the collar portion abuts flush against an edge area of the outer container nipple facing away from the outer container body, wherein, on its surface abutting flush against the edge area of the outer container nipple facing away from the outer container body, the collar portion has a slot-like recess that goes around the dispensing opening to form a vent slot, wherein, on its surface abutting flush against the edge area of the outer container nipple facing away from the outer container body, the collar portion has at least one slot-like recess extending away from the dispensing opening to form a vent cutout, wherein the at least one slot-like recess to form at least one vent duct is fluidically connected with the slot-like recess to form a vent slot, and the slot-like recess to form the vent slot is fluidically connected with the slot-like recess to form at least one vent cutout, wherein the vent duct, the vent slot and the vent cutout form a fluidic connection between the environment and a space located between the inner container and the outer container form a fluidic connection between the environment and a space located between the inner container and the outer container.

10. The dispenser container according to claim 9, characterized in that the slot-like recess to form a vent slot provided in the collar portion and running around the dispensing opening runs concentrically to the dispensing opening.

11. The dispenser container according to claim 9, characterized in that the inner container dispensing portion has several slot-like recesses on its surface facing the outer container nipple to form several vent ducts, wherein the slot-like recesses to form the vent ducts preferably run parallel to each other and especially preferably parallel to the dispenser container longitudinal axis (SBLA).

12. The dispenser container according to claim 11, characterized in that the slot-like recesses to form the vent ducts are provided evenly distributed over the circumference of the inner container dispensing portion.

13. The dispenser container according to claim 9, characterized in that the collar portion has several slot-like recesses to form several vent cutouts extending away from the dispensing opening, wherein the slot-like recesses to form the vent cutouts are preferably provided evenly distributed over the circumference of the inner container dispensing portion.

14. The dispenser container according to claim 5, characterized in that the dimensionally stable material of the outer container consists of glass, plastic, metal, a metal alloy or a composite material.

15. The dispenser container according to claim 5, characterized in that the blow molded elastic plastic of the inner container body is a thermoplastic material, in particular a polyamide, a polyolefin or a polycarbonate, especially preferably polyethylene terephthalate, polyvinyl chloride, polyethylene or polypropylene.

16. The dispenser container according to claim 5, characterized in that the dimensionally stable plastic of the inner container dispensing portion has a higher melting temperature than the blow-molded elastic plastic of the inner container body.

17. The dispenser container manufactured using a method according to claim 1.

18. The dispenser container manufactured using a method according to claim 2.

19. The dispenser container manufactured using a method according to claim 3.

20. The dispenser container manufactured using a method according to claim 4.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

[0072] The invention will be described in more detail below based on exemplary embodiments in conjunction with the drawings. Let it be expressly noted that the invention is not to be limited to the indicated examples. Shown on:

[0073] FIG. 1 is a vertical section of a dispenser container according to the invention;

[0074] FIG. 2A is a side view of a preform according to the invention:

[0075] FIG. 2B is a perspective view of the preform on FIG. 2A from diagonally below:

[0076] FIG. 3A is an outer container with preform and stretch blow molding pin before the blow molding process:

[0077] FIG. 3B is an outer container with inner container and stretch blow molding pin during the blow molding process.

DETAILED DESCRIPTION OF THE INVENTION

[0078] FIG. 1 shows a vertical section of a dispenser container 1. The dispenser container 1 comprises an outer container 2 and an inner container 3 arranged inside of the outer container 2. A filler material can be accommodated inside of the inner container 3.

[0079] In the exemplary embodiment shown, the outer container 2 is comprised of an outer container bottom 16, an outer container body 5, an outer container shoulder 9 and an outer container nipple 10. The outside of the outer container nipple 10 is equipped with a male thread 15. A pumping device designed as desired can be screwed onto the male thread 15 for removing the filler material. However, a closure lid can also be screwed on, which seals the outer container opening provided on the upper end of the outer container nipple 10, meaning the one facing away from the outer container body 5.

[0080] The outer container 2 consists of a dimensionally stable material. In the exemplary embodiment shown, the outer container 2 is made of glass.

[0081] The inner container 3 has an inner container body 6 arranged in the area of the outer container body 5 and an inner container dispensing portion 7 having a dispensing opening 11 arranged in the area of the outer container nipple 10. The inner container dispensing portion 7 extends in the direction of a dispenser container longitudinal axis SBLA over the entire expansion of the outer container nipple 10 until into the area of the outer container shoulder 9.

[0082] The inner container body 6 consists of a blow-molded elastic plastic, and the inner container dispensing portion 7 consists of a dimensionally stable plastic. In the exemplary embodiment shown on FIG. 1, the inner container body 6 is made of polyethylene, and the inner container dispensing portion 7 is made of a crosslinked polyurethane.

[0083] As evident from FIG. 1, the stretch blow molding process to form the inner container was carried out until such time that the outer surface of the inner container body 6 is in contact with the inner surface of the outer container 2 over the entire expansion of the outer container bottom 15, the entire expansion of the outer container body 5 and over more than 90% of the expansion of the outer container shoulder 9. The inner container and the outer container are thus in contact with each other not just over the entire expansion of the inner surface of the outer container bottom 16 and over the entire expansion of the inner surface of the outer container body 5, but additionally over the vast majority of the expansion of the outer container shoulder 9.

[0084] Additional features and properties of the inner container dispensing portion 7 are illustrated on FIGS. 2A and 2B, which show a preform 20 as viewed from the side (FIG. 2A) and in perspective from diagonally below (FIG. 2B). Such a preform is used for manufacturing an inner container 3 for a dispenser container 1 of the kind shown on FIG. 1. The preform 20 has a cup-like molded body 21, and is constructed from two portions 21.6, 21.7. The first portion 21.6 forms the closed end of the molded body 21, while the second portion 21.7 forms the open end of the molded body 21, wherein the closed end lies opposite the open end.

[0085] The first portion 21.6 is provided to form the inner container body 6, and the second portion 21.7 is provided to form the inner container dispensing portion 7. The first section 21.6 consists of a blow-moldable elastic plastic, in the present case of polyethylene, while the second portion 21.7 consists of a dimensionally stable plastic, in the present case of a crosslinked polyurethane.

[0086] On FIGS. 2A and 2B, the dispensing opening provided at the upper end, meaning at the end of the inner container dispensing portion 7 facing away from the first portion 21.6 (see FIG. 1) is marked with reference number 11. The outer surface of the second portion 21.7 provided to form the inner container dispensing portion 7 has several slot-like recesses to form a corresponding number of vent ducts 4. The slot-like recesses run parallel to each other and parallel to the dispenser container longitudinal axis SBLA (see FIG. 1). The exemplary embodiment shown has a total of ten slot-like recesses to form a corresponding number of vent ducts 4.

[0087] Also clearly evident on FIGS. 2A and 2B is the circumferential collar portion 13 provided in an area of the inner container dispensing portion 7 adjacent to the dispensing opening 11. A slot-like recess is provided in the collar portion 13 for the subsequent formation of a vent cutout 14.

[0088] Shown in the perspective view on FIG. 2B is the slot-like recess to form a vent slot 8, which runs concentrically around the dispensing opening 11 and is present in the surface of the collar portion 13 provided so as to abut flush against the edge area of the outer container nipple 10 facing away from the outer container body 5.

[0089] The slot-like recess to form the vent cutout 14 and the slot-like recesses to form the vent ducts 4 are here fluidically connected with the circumferential, slot-like recess to form a vent slot 8. After the preform 20 has been introduced into the outer container 2, these recesses correspondingly form the vent duct, the vent slot and the vent cutout, as a result of which a fluid connection is formed between the space 12 (see FIG. 3A) located between the preform 20 and the outer container 2 and the outside atmosphere.

[0090] In the dispenser container 1 on FIG. 1, the vent ducts are arranged on the surface of the inner container dispensing portion 7 facing the outer container nipple 10. The collar element 13 abuts flush against an edge area 10.R of the outer container nipple 10 facing away from the outer container shoulder 9. The vent cutout provided in the collar element 13 is fluidically connected with the circumferential vent groove and the vent ducts, and in this way establishes a fluid connection of the space 12 located between the inner container 3 and the outer container 2 to the outside atmosphere. The vent cutout, the vent groove and the vent ducts are not visible in the sectional view on FIG. 1.

[0091] The method according to the invention for manufacturing a dispenser container 1 as shown on FIG. 1 will be described below based on FIGS. 3A and 3B. An outer container 2 is first provided (see FIG. 3A), which corresponds to the outer container 2 described in conjunction with FIG. 1. In addition, a preform 20 is provided, the properties and features of which have already been discussed in conjunction with FIGS. 2A and 2B. The preform 20 is heated to a temperature sufficient for a stretch blow molding process, introduced into the outer container 2, and a stretch blow molding pin 30 is introduced into the preform 20, resulting in the configuration shown on FIG. 3A. The stretch blow molding pin 30 can also be introduced into the preform 20 before the preform 20 is introduced into the outer container 2.

[0092] A stretch blow molding process is then performed, wherein the flow of introduced gas is symbolized on FIG. 3B by several arrows. The stretch blow molding process yields the inner container 3. The air contained in the space 12 located between the preform 20 and the outer container 2 (FIG. 3A) is here displaced, escaping through the vent ducts, the vent groove and the vent cutout into the environment. Stretch blow molding to form the inner container is performed until the outer surface of the inner container body 6 is in contact with the inner surface of the outer container 2 over the entire expansion of the outer container bottom 15, the entire expansion of the outer container body 5 and over more than 90% of the expansion of the outer container shoulder 9. As a result, the inner container 3 forms in the desired manner, and fills the volume of the outer container 2 practically completely (see FIG. 3B), to include in particular in the area of the outer container shoulder 9.