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EP-4393841-B1 - PACKAGING BASE

EP4393841B1EP 4393841 B1EP4393841 B1EP 4393841B1EP-4393841-B1

Inventors

  • Radojicic, Radoje
  • Nikolovski, Vladimir
  • Lemovec, Anze
  • Kreft, Zan

Dates

Publication Date
20260506
Application Date
20231220

Claims (12)

  1. A packaging base (1) for household appliances such as a refrigerator, dishwasher, cooker, etc., comprising: - a polypropylene tray (2) comprising a quadrangular bottom (2a) and four peripheral lateral walls (2b) rising vertically from the bottom, - a wood panel (3) arranged at the bottom of the tray so that it essentially fully covers the bottom of the tray, and - at least a single-layer honeycomb paperboard (4) arranged in the tray over the wood panel and comprising a honeycomb core and two mutually parallel layers (4a) of paperboard glued to the honeycomb core (4b) on a respective side of the core, the honeycomb walls being oriented in a vertical direction.
  2. The packaging base according to claim 1, characterized in that the honeycomb paperboard comprises one or more recesses on its upper side.
  3. The packaging base according to claim 2, characterized in that the height of the recess does not exceed 70% of the total height of the honeycomb paperboard.
  4. The packaging base according to claim 3, characterized in that the height of the recess is between 20% and 30% of the total height of the honeycomb paperboard, in particular 25% of the total height of the honeycomb paperboard.
  5. The packaging base according to any of the previous claims, characterized in that the height of the honeycomb paperboard is between 30 mm and 50 mm, preferably 40 mm.
  6. The packaging base according to any of the previous claims, characterized in that the compressive strength of the honeycomb paperboard is 5 kg/cm 2 .
  7. The packaging base according to any of the previous claims, characterized in that the honeycomb paperboard is a two- or multi-layer honeycomb paperboard.
  8. The packaging base according to any of the previous claims, characterized in that the polypropylene tray has a cellular structure.
  9. The packaging base according to any of the previous claims, characterized in that the polypropylene tray is made of a panel having a thickness of 3 mm to 5 mm, preferably 4 mm.
  10. The packaging base according to any of the previous claims, characterized in that the wood panel is selected from a group comprising: plywood, particleboard and medium-density fibreboard made of wood fibres with the addition of resin or synthetic glue, also called a medium-density fibreboard (MDF).
  11. The packaging base according to any of the previous claims, characterized in that the thickness of the wood panel is between 3 mm and 8 mm, preferably 6 mm.
  12. The packaging base according to any of the previous claims, characterized in that the flexural strength of the wood panel is between 90 N/mm 2 and 133 N/mm 2 .

Description

Field of Invention The invention relates to a packaging base for household appliances such as a refrigerator, dishwasher, cooker, etc. Prior art The purpose of the packaging base for household appliances is to protect the household appliance from shocks during transport and handling of the household appliance on the way from the production line to the end customer, i.e. to the place of operation of the household appliance. The function of the packaging base is therefore to resist static and dynamic compressive loads and to provide a certain elasticity. A further function to be fulfilled by the packaging base is to protect the household appliance against possible ground moisture. The prior art document CN 20426681U discloses a packaging base for a refrigerator formed from an expanded polystyrene (EPS) supporting element and elastic cushioning elements. This base fulfils the above tasks well and is of low mass. However, its disadvantage is rather limited recyclability of expanded polystyrene. It can be ground and added to new EPS as an additive and compressed into new products. However, end customers often dispose of the packaging base in residual municipal waste after transporting the household appliance. The EPS decomposition process in landfill is slow and releases toxic substances into the environment. Document WO2022248010A1 is also known from prior art. It discloses a packaging base on which a household appliance can be arranged, comprising a tray having a bottom wall and lateral walls and two or more cushioning elements arranged in said tray and adapted to at least partially bear the weight of the household appliance and to protect from impacts a bottom region of the household appliance loaded on them. The packaging base further comprises a positioning element housed in the tray and removably coupled to said cushioning elements in such a way to keep them in a prefixed working position in which they at least partially bear the weight of the household appliance, when said household appliance is loaded on said packaging base. The packaging base may further comprise a load-bearing element. A disadvantage of said packaging base is its large number of elements of complex shapes, which has a negative impact on production costs. The document CN 102 275 666 B shows packaging base comprising a Polyethylene strip edging, surrounding wood boards respectively adhered to the upper and lower sides of the honeycomb paperboard. Technical problem The technical problem is how to provide a packaging base for household appliances that has adequate mechanical strength, elasticity to compensate for minor impacts, capability to plastically deform in the event of major impacts, provides protection against ground moisture and is environmentally friendly and fully recyclable. Furthermore, the invention aims to provide a simple packaging base with low production costs. Solution to the technical problem The relative terms such as lower, upper etc. are defined depending on the orientation of the packaging base in the working position, that is the position in which it can receive a household appliance. The technical problem is solved by a packaging base for household appliances such as a refrigerator, dishwasher, cooker, etc., defined in claim 1, comprising: a polypropylene tray comprising a quadrangular bottom and four peripheral lateral walls rising vertically from the bottom,a wood panel arranged at the bottom of the tray so that it essentially fully covers the bottom of the tray, andat least a single-layer honeycomb paperboard arranged in the tray over the wood panel and comprising a honeycomb core and two mutually parallel layers of paperboard glued to the honeycomb core on a respective side of the core, the honeycomb walls being oriented in a vertical direction. The advantage of the packaging base for household appliances according to the invention over known bases is that all components can be easily separated and recycled, while the base is lightweight, provides adequate mechanical strength, elasticity to absorb minor shocks and vibrations, and deforms plastically in the event of major impacts, thus protecting the household appliance from mechanical damage and possible failure, and offering protection against ground moisture and possible water. The packaging base according to the invention is simple and ensures low production costs. Figure 1: Packaging base componentsFigure 2: Honeycomb paperboard with the top paperboard layer partially removed The invention is described in more detail hereinbelow. The technical problem is solved by a packaging base 1 for household appliances such as a refrigerator, dishwasher, cooker, etc., comprising: a polypropylene tray 2 comprising a quadrangular bottom 2a and four peripheral lateral walls 2b rising vertically from the bottom,a wood panel 3 arranged at the bottom of the tray so that it essentially fully covers the bottom of the tray, andat least a single-layer honeycomb paperboard 4 arr