Container, preform assembly and method and apparatus for forming containers

Patent metadata

Field	Value
Publication number	US-9714117-B2
Application number	US-201314442205-A
Country	US
Kind code	B2
Filing date	Nov 13, 2013
Priority date	Nov 13, 2012
Publication date	Jul 25, 2017
Grant date	Jul 25, 2017

Abstract

Container comprising an inner container and an outer container with facing surfaces, wherein at least part of at least one of the facing surfaces has a surface roughness higher than about 0.1 Ra and/or wherein the difference in roughness of said facing surfaces is at least over a part more than about 0.1 Ra.

First claim

The invention claimed is:

1. Container comprising an inner container and an outer container with facing surfaces, wherein at least part of at least one of the facing surfaces has a surface roughness higher than about 0.1 Ra and/or wherein the difference in roughness of said facing surfaces is at least over a part more than about 0.1 Ra.

2. Container according to claim 1 , wherein said at least one surface is the outer surface of the inner container.

3. Container according to claim 1 , wherein the inner and outer container have a neck region, wherein an outer surface part of the neck region of the inner container and/or an inner surface part of the neck region of the outer container has a surface roughness of at least 0.1 Ra.

4. Container according to claim 1 , wherein said surface roughness is at least 0.25 Ra.

5. Container according to claim 4 , wherein said roughness is at least 0.30 Ra.

6. Container according to claim 1 , wherein the inner container and/or outer container having said surface roughness on at least part of a surface comprises particles enclosed in the wall, between the plastic forming chains of the plastic wall of the container.

7. Container according to claim 6 , wherein the particles are made of or at least contain material different from the plastic of the wall of said container.

8. The container according to claim 7 , wherein said material is metal.

9. Container according to claim 6 , wherein the particles are or contain flakes.

10. The container according to claim 9 , wherein said flakes are metal flakes.

11. The container according to claim 9 , wherein said flakes are aluminum flakes.

12. Container according to claim 6 , wherein the particles form between 0.5% and 5% by weight.

13. The container according to claim 6 , wherein the particles form between 0.5% and 2.5% by weight.

14. The container according to claim 6 , wherein the particles form between 0.5% and 2% by weight.

15. Container according to claim 1 , wherein the container is integrally blow moulded from a preform-in-preform, wherein at least one of the preforms has been roughened at least in part, after injection moulding thereof, and/or wherein at least one of the preforms has been injection moulded in a mould having an at least partly roughened mold surface and/or wherein at least one of the preforms is provided with a foamed surface layer of plastic.

16. The container according to claim 15 , wherein the foamed surface layer of plastic is a foamed surface layer of PET.

17. Container according to claim 1 , wherein at least one of the inner container and the outer container is made of PET, a PET blend or a crystalline or semi-crystalline plastic, wherein the inner is connected to the outer container at a neck region closing off a space between the inner container and the outer container, wherein at least one opening is provided into said space for introducing a pressurizing medium into said space, wherein the container has a body in which the outer container abuts the inner container and wherein the inner container can be compressed by said pressurizing medium at a pressure below 2 Bar absolute.

18. The container according to claim 17 , wherein both of the inner container and the outer container are made of PET, a PET blend or a crystalline or semi-crystalline plastic.

19. Container blow moulded from a preform assembly comprising a first preform in a second preform, according to claim 1 , wherein a first layer of the container formed from the first preform and a second layer, outside the first layer, formed from the second preform, wherein the plastics material of the first preform has been stretched further for forming the first layer than the plastics material of the second preform for forming the second layer.

20. Container according to claim 1 , wherein the inner and outer container have a neck region, wherein an outer surface part of the neck region of the inner container and/or an inner surface part of the neck region of the outer container has a surface roughness of at least 0.1 Ra and wherein the further surface parts of the outer surface of the inner container and the inner surface of the outer container of at least body forming portions thereof either have the same surface roughness or a lower surface roughness.

21. Container according to claim 1 , wherein the outer container is transparent or translucent, which can be coloured, and the inner container is opaque or non-transparent, having a light reflecting outer appearance.

22. The container according to claim 21 , wherein the inner container has a silver colored outer appearance.

23. Preform set for integrally blow moulding a container according to claim 1 , comprising at least an outer preform and an inner preform, fitting at least partly inside the outer preform, both having a neck forming portion, a shoulder forming portion and a body forming portion, wherein at least a first of the inner and outer preform has a surface region in contact with the other of the inner and outer preform, wherein:
at least part of said region has a surface roughness of at least 0.1 Ra and/or a surface roughness which is at least 0.1 Ra higher than the surface roughness of the surface area of the other of the inner and outer preform with which it is in contact and/or
at least part of said region has a surface roughness such that in a container integrally blow moulded from said assembly of preforms the surface area of the container formed from said surface region has a surface roughness of at least 0.1 Ra and/or a surface roughness of at least 0.1 Ra higher than the surface roughness of an adjacent surface area of the adjacent container.

24. Preform set according to claim 23 , wherein the said first preform is the inner preform.

25. Preform set according to claim 23 , wherein said first preform is injection moulded from plastic, having a wall, wherein in the wall particles are dispersed, which are enclosed between monomer and/or polymer chains of the plastic.

26. Preform set according to claim 25 , wherein the particles comprise a material different from the plastic.

27. The preform set according to claim 26 , wherein the material is metal or metalized particles.

28. Preform set according to claim 25 , wherein the particles are light reflecting and/or are coloured particles.

29. The preform set according to claim 28 , wherein the particles have at least partly a silver color.

30. The preform set according to claim 28 , wherein the particles are made of aluminum.

31. Preform set according to claim 25 , wherein the particles are or comprise flakes.

32. Preform set according to claim 25 , wherein the particles are contained in a layer of a material having a lower melting point than that of the particles and/or the plastic.

33. The preform set according to claim 32 , wherein the material is a wax.

34. The preform set according to claim 32 , wherein the material is a wax which is not precipitated from the preform or container during and/or after blow moulding a container from said set of preforms.

35. The preform set according to claim 25 , wherein the particles are flakes.

36. Preform set for blow moulding a container, comprising at least a first and a second preform, according to claim 2

Assignees

• Heineken Supply Chain Bv

Inventors

• Paauwe Arie Maarten
• Bax Bart Jan
• Blom Harold Marcel

Classifications

• B29B11/16

  comprising fillers or reinforcement {(non-woven fabrics per se D04H1/00, D04H3/00)} · CPC title

• B65D1/023

  Neck construction · CPC title

• B65D23/02 Primary

  Linings or internal coatings · CPC title

• B29B11/08

  Injection moulding · CPC title

• B29K2105/253

  Preform · CPC title