FR2910439A1 - Object transporting and storing pallet, has multilayer film partially made of elastomer materials and thermoplastic materials and surmounted on plate, where pallet is made of high density polyethylene - Google Patents

Object transporting and storing pallet, has multilayer film partially made of elastomer materials and thermoplastic materials and surmounted on plate, where pallet is made of high density polyethylene Download PDF

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Publication number
FR2910439A1
FR2910439A1 FR0655912A FR0655912A FR2910439A1 FR 2910439 A1 FR2910439 A1 FR 2910439A1 FR 0655912 A FR0655912 A FR 0655912A FR 0655912 A FR0655912 A FR 0655912A FR 2910439 A1 FR2910439 A1 FR 2910439A1
Authority
FR
France
Prior art keywords
pallet
film
made
according
material
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
FR0655912A
Other languages
French (fr)
Inventor
Denis Obriot
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Plastic Omnium Cie
Original Assignee
Plastic Omnium Cie
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Plastic Omnium Cie filed Critical Plastic Omnium Cie
Priority to FR0655912A priority Critical patent/FR2910439A1/en
Publication of FR2910439A1 publication Critical patent/FR2910439A1/en
Application status is Pending legal-status Critical

Links

Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B65CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65DCONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
    • B65D19/00Pallets or like platforms, with or without side walls, for supporting loads to be lifted or lowered
    • B65D19/0004Rigid pallets without side walls
    • B65D19/0006Rigid pallets without side walls the load supporting surface being made of a single element
    • B65D19/003Rigid pallets without side walls the load supporting surface being made of a single element forming discontinuous or non-planar contact surfaces
    • B65D19/0032Rigid pallets without side walls the load supporting surface being made of a single element forming discontinuous or non-planar contact surfaces the base surface being made of a single element
    • B65D19/0034Rigid pallets without side walls the load supporting surface being made of a single element forming discontinuous or non-planar contact surfaces the base surface being made of a single element forming a continuous plane contact surface
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29CSHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C45/00Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
    • B29C45/14Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor incorporating preformed parts or layers, e.g. injection moulding around inserts or for coating articles
    • B29C45/14778Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor incorporating preformed parts or layers, e.g. injection moulding around inserts or for coating articles the article consisting of a material with particular properties, e.g. porous, brittle
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29KINDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
    • B29K2621/00Use of unspecified rubbers for preformed parts, e.g. for inserts
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29LINDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
    • B29L2031/00Other particular articles
    • B29L2031/712Containers; Packaging elements or accessories, Packages
    • B29L2031/7178Pallets
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B65CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65DCONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
    • B65D2519/00Pallets or like platforms, with or without side walls, for supporting loads to be lifted or lowered
    • B65D2519/00004Details relating to pallets
    • B65D2519/00009Materials
    • B65D2519/00014Materials for the load supporting surface
    • B65D2519/00034Plastic
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B65CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65DCONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
    • B65D2519/00Pallets or like platforms, with or without side walls, for supporting loads to be lifted or lowered
    • B65D2519/00004Details relating to pallets
    • B65D2519/00009Materials
    • B65D2519/00049Materials for the base surface
    • B65D2519/00069Plastic
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B65CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65DCONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
    • B65D2519/00Pallets or like platforms, with or without side walls, for supporting loads to be lifted or lowered
    • B65D2519/00004Details relating to pallets
    • B65D2519/00258Overall construction
    • B65D2519/00313Overall construction of the base surface
    • B65D2519/00328Overall construction of the base surface shape of the contact surface of the base
    • B65D2519/00333Overall construction of the base surface shape of the contact surface of the base contact surface having a stringer-like shape
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B65CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65DCONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
    • B65D2519/00Pallets or like platforms, with or without side walls, for supporting loads to be lifted or lowered
    • B65D2519/00004Details relating to pallets
    • B65D2519/00736Details
    • B65D2519/00825Finishing of the external surfaces
    • B65D2519/0083Anti-slip means
    • B65D2519/0084Separated elements, e.g. including in-moulded elements

Abstract

The pallet has a single layer or multilayer film partially made of elastomer materials and thermoplastic materials e.g. polyethylene, surmounted on a plate, where the pallet is made of high density polyethylene and injected plastic material. The plate comprises a platen area for storage, where the multilayer film is arranged on the platen area and comprises a base layer (28) made of high density polyethylene and a coating layer (29). Bases comprise a supporting surface for contact with ground, and the film is arranged on the supporting surface.

Description

The present invention relates to a pallet for the transport and

  storage of objects. Known in the state of the art, a pallet provided with a non-slip zone, made of elastomer and disposed on a tray of the pallet, intended to carry at least one object. Such anti-slip area increases the friction between the pallet and the objects loaded thereon, to prevent slippage objects during pallet handling operations. This zone thus makes it possible to avoid that the objects stored on the pallet are damaged. Such an anti-slip zone is constituted by a self-adhesive label attached to the pallet plate, using a suitably chosen glue.

  The self-adhesive label, even if it is held with a good quality adhesive, is likely to be altered (scratched, torn or torn off), for example by an object having a projecting portion resting on the pallet or during maintenance operations (for example, cleaning) thereof. The object of the invention is to remedy these drawbacks.

  For this purpose, the subject of the invention is a pallet for transporting and storing objects, made of injected plastic material, the pallet being provided with at least one non-slip zone made at least partially of an elastomeric material, characterized in that the anti-slip zone is constituted by a film molded on the pallet.

  It is known to those skilled in the art that the binding of a film to a solid object by overmolding allows a better holding of the film in time than when the binding of the film to the solid object is performed by gluing. Indeed, during overmolding, the connection between the materials of the film and the object is not limited to an interface, as during bonding, but involves a mixture of the two materials over a certain thickness, which ensures better holding of the link. The connection of the anti-slip zone and the pallet by overmolding can be observed once the pallet is manufactured. Indeed, the over-molding connection is a connection without interposition of material between the pallet and the film. In addition, it results from overmolding an intermediate medium, located between the materials of the film and the pallet, whose composition is variable continuously or almost continuously between the composition of the material of the film and that of the material of the pallet . A pallet provided with a film and having, in the vicinity of the film, these characteristics is a pallet provided with an overmolded film, no other technique which, to the applicant's knowledge, makes it possible to obtain such characteristics. The bond characterized in the foregoing manner can be a chemical bond of the film and the pallet, in which the materials of the film and the pallet are bonded forming a single phase, or a mechanical bond, for example 2910439 -2- if the film comprises fibers, some of which disintegrate due to heat and drowns deep in the injected plastic material of the pallet. Although overmolding is a known technique, the skilled person would not have been encouraged by his general knowledge to use this technique to bind the anti-slip area to the pallet. Indeed, to maximize the friction, it is preferable that the anti-slip area forms a slight extra thickness on the surface of the pallet. However, the skilled person considers that obtaining this extra thickness using an overmolding technique is complex and expensive because it involves the creation of a specific mold comprising a groove for receiving the anti-slip film.

However, the inventors at the basis of the invention have noticed that overmolding a film so that it forms an extra thickness, while keeping a standard mold for the manufacture of the pallet, was possible. Indeed, the film made of elastomer is easily elastically deformable and therefore tends to flatten reversibly against the wall of the mold against which it is disposed. Molding therefore occurs with the film 15 flattened by the pressure exerted on it by the injected material. At the outlet of the mold, the film resumes its original thickness and then forms an extra thickness relative to the surface of the pallet. In the invention, the film constituting the anti-slip zone is, for an anti-slip effect equivalent to that of the state of the art, more firmly linked to the pallet. Thus, when, during the handling of the pallet, it undergoes aggression causing its stripe in the anti-slip zone, and, therefore, cutting into two distinct parts of the film constituting this area, the film is not susceptible to come off the pallet. Indeed, the connection by overmolding is deep and is therefore little degraded by mechanical actions, unlike a bond bonding.

In addition, the connection of the anti-slip zone and the pallet is little affected by external disturbances and is particularly resistant to cleaning. Therefore, thanks to the invention, the service life of the anti-slip zone is equivalent to the life of the pallet, which makes it possible to avoid maintenance operations of the pallet and / or to reduce the There is a risk of damaging the objects stored on the pallet when the latter is handled. Advantageously, the film is made partially of a thermoplastic material, chosen to substantially increase the rigidity of the film. Indeed, it is generally considered that a film made of an elastomeric material (this material allowing the constitution of a very effective anti-slip) can not be overmoulded because such a film is likely not to hold satisfactorily by static electricity against a wall of the mold, during the injection. This film may peel off, wrinkle or move before it has been in contact with the injected material. The poor behavior of the film on the wall therefore generates a very high scrap rate of the pallets, for which the film is not placed at the desired location on the pallet. As a result, the person skilled in the art would not be encouraged to overmold a film made of elastomer on a pallet. However, the inventors at the base of the invention have noticed that an elastomeric film does not remain in place against the wall of the mold because of its flexibility. Thus, by stiffening the film with a thermoplastic material having good mechanical properties, its holding on the wall of the mold is better.

Thanks to the invention, the film making it possible to form the anti-slip zone is therefore sufficiently rigid so that it is possible to over-mold such a film on a pallet without significantly increasing the rejection rate of the pallets. Optionally, the pallet according to the invention also comprises at least one of the following features: the thermoplastic material of the film is compatible with the material in which the pallet is made. By compatible with a given material is meant a material capable of mixing with the given material by forming a single phase; the film is a monolayer film and is made of a material comprising a mixture of elastomer and the thermoplastic material, the film is a multi-layer film and comprises a base layer comprising the thermoplastic material and an elastomer-based coating layer; the base layer consists of fibers, for example polyamide fibers (PA); , in particular fibers compatible with the elastomer of the outer layer, the pallet is made of polyethylene (PE), in particular high-density polyethylene (HDPE), the thermoplastic material of the film may comprise polyethylene, the pallet comprises a a tray having a useful storage surface, the film being arranged on the useful storage surface, so as to prevent slipping of the objects stored on the pallet; A pallet comprises at least one foot having a bearing surface intended to be in contact with the ground, the film being arranged on the bearing surface, so as to prevent the pallet from sliding on the ground. The invention will be better understood on reading the description which follows, given solely by way of example and with reference to the drawings in which: FIG. 1 is a sectional view of a pallet according to FIG. invention; FIG. 2 diagrammatically represents a detail of the interface of the label and the pallet according to a first embodiment of the invention; - Figure 3 schematically shows a detail of the interface of the label and the pallet according to a second embodiment of the invention.

FIG. 1 shows a pallet 10 comprising a plate 12 having a useful surface 15 for storing objects. The pallet also comprises three parallel legs 16 each comprising three legs 18, 20, 22, connected by strips 24. Each foot is supported on the ground by means of a bearing surface 26.

The tray 12 comprises, on the storage area 15, one or more non-slip areas 27 (three areas are shown in the drawing), each forming a slight allowance for the storage area 15. shown in detail in FIG. 2) forms a rough surface and comprises corrugations 30 on its surface intended to be in contact with the objects 15 carried by the pallet. Each anti-slip zone 27 is constituted by a film. As can be seen in FIG. 2, in a first embodiment, the film 27 is a two-layer film and comprises a base layer 28 made of polyethylene (PE), in particular of high-density polyethylene (HDPE), intended for located on the pallet side, and a coating layer 29, intended to be on the outside and to be visible.

This coating layer 29, made of an elastomer-based material, more particularly of high-density polyethylene copolymer with polybutadiene components, is elastically deformable and comprises, on its outer surface, the corrugations 30 forming the rough surface making it possible to perform the process. anti-slip function. The two layers 28, 29 are made of chemically compatible materials and are therefore chemically bonded to one another. The plate 12 and each base 16 is injection molded and is made of polyethylene (PE), in particular high density polyethylene (HDPE). These different elements are then assembled to form the pallet 10. The film 27 is overmolded on the plate 12 of the pallet 10 during the molding thereof. For this purpose, the film 27 is electrically charged, inserted in the injection mold of the plate 12, preferably facing an injection point, the coating layer 29 being pressed against the wall of the mold to form the The film 27 remains attached in a given position to the wall of the mold by static electricity, due to its mechanical properties, in particular thanks to the rigidity provided to the film by the polyethylene base layer. The mold is then closed and the viscous and hot polyethylene intended to form the pallet is injected into the mold. The pressure exerted by the flow of injected material plates the deformable coating layer 29 due to the elastomeric material against the wall of the mold, so that the corrugations 30 are flattened against the wall. In contact with the viscous material, the base layer 28 of the film 27 melts in part and this melted part mixes with the material of the pallet forming a single phase. The polymer chains of the two materials, respectively of the pallet 10 and the base layer 28, intermingle because these two materials are compatible. Upon cooling of the materials, a chemical and mechanical bond is thus formed between the polymer chains of the base layer material and those of the pallet material. The base layer 28 is linked without interposition of material to the pallet. The material of the base layer 28 and the material of the pallet 10 are mixed to a thickness 36, forming a single phase. The polymer chains of the two materials, because of their length, are intermingled in this thickness 36 and the connection between the film and the pallet 10 therefore extends over the entire thickness 36. This connection is therefore not susceptible to be broken by a mechanical shock reaching the pallet on the surface. The anti-slip film 27 therefore remains in place on the pallet regardless of the mechanical stresses to which it is subjected in the region in which the film is affixed.

In the second embodiment of FIG. 3, the film is constituted by a coating layer 40 with a rough outer face as described above and by a base layer 41 made of a non-woven fabric (or "non-woven") of polyamide fibers (PA). In the base layer, the polyamide fibers are agglomerated and welded together. They are also linked to the outer layer, mechanically or chemically by means of an appropriate intermediate compatibilizer, which the skilled person will be able to choose. During overmoulding, the injected polyethylene 42, by its heat, causes a portion of the polyamide fibers to disintegrate. These fibers remain, in their near totality, integral with each other and integral with the outer layer 40. The disintegrated portion of each fiber is upright with respect to the general plane of the label and mixes with the molten polyethylene 42. cooled and hardened, the fibers form mechanical bonds which root deep down, over the entire thickness 44, in the polyethylene and ensure the fastening of the label on the pallet. It will be appreciated that the invention is not limited to the previously described embodiments. Alternatively, the label may be composed of a monolayer film comprising an elastomer-based mixture as described above or a film comprising more than two layers. The corrugations 30 forming the rough surface may also be replaced by projections, for example pins.

In addition, the film can be placed at other places on the pallet, for example on the bearing surface 26 of a foot 18, 20, 22. The materials mentioned in the examples can also be replaced by any material adapted.

Claims (10)

  1.   Pallet (10) for transporting and storing objects, made of injected plastic material, the pallet (10) being provided with at least one anti-slip zone (27) made at least partially of an elastomeric material, characterized in that the anti-slip zone (27) consists of a film molded on the pallet.
  2.   2. Pallet (10) according to the preceding claim, wherein the film (27) is partially made of a thermoplastic material, chosen to substantially increase the rigidity of the film.
  3.   3. Pallet (10) according to the preceding claim, wherein the thermoplastic material of the film (27) is compatible with the material in which is formed the pallet (10).
  4.   Pallet (10) according to any one of claims 2 and 3, wherein the film (27) is a monolayer film, made of a material comprising a mixture of elastomer and the thermoplastic material.
  5.   The pallet (10) according to any of claims 2 and 3, wherein the film (27) is a multilayer film comprising a base layer comprising the thermoplastic material and an elastomeric coating layer.
  6.   6. Pallet (10) according to the preceding claim, wherein the base layer (28; 41) is constituted by fibers, for example polyamide fibers (PA).
  7.   7. Pallet (10) according to any one of the preceding claims, wherein the pallet (10) is made of polyethylene (PE), in particular high density polyethylene (HDPE).
  8.   The pallet (10) according to claims 3 and 7, wherein the thermoplastic material of the film (27) comprises polyethylene (PE).
  9.   Pallet (10) according to any of the preceding claims, comprising a plate (12) having a useful storage surface (15), the film (27) being arranged on the useful storage surface (15).
  10.   Pallet (10) according to any one of the preceding claims, comprising at least one foot (18, 20, 22) having a bearing surface (26) intended to be in contact with the ground, the film (27). being disposed on the bearing surface (26).
FR0655912A 2006-12-22 2006-12-22 Object transporting and storing pallet, has multilayer film partially made of elastomer materials and thermoplastic materials and surmounted on plate, where pallet is made of high density polyethylene Pending FR2910439A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
FR0655912A FR2910439A1 (en) 2006-12-22 2006-12-22 Object transporting and storing pallet, has multilayer film partially made of elastomer materials and thermoplastic materials and surmounted on plate, where pallet is made of high density polyethylene

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR0655912A FR2910439A1 (en) 2006-12-22 2006-12-22 Object transporting and storing pallet, has multilayer film partially made of elastomer materials and thermoplastic materials and surmounted on plate, where pallet is made of high density polyethylene

Publications (1)

Publication Number Publication Date
FR2910439A1 true FR2910439A1 (en) 2008-06-27

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Family Applications (1)

Application Number Title Priority Date Filing Date
FR0655912A Pending FR2910439A1 (en) 2006-12-22 2006-12-22 Object transporting and storing pallet, has multilayer film partially made of elastomer materials and thermoplastic materials and surmounted on plate, where pallet is made of high density polyethylene

Country Status (1)

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FR (1) FR2910439A1 (en)

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5453236A (en) * 1994-02-08 1995-09-26 Composite Design International, Inc. Method of molding a load bearing pallet from recycled materials
FR2868044A1 (en) * 2004-03-23 2005-09-30 Allibert Equipement Sa Handling device
FR2882730A1 (en) * 2005-03-02 2006-09-08 Allibert Equipement Sa Plastic pallet for handling heavy load, has absorption unit to absorb differential expansion between material of reinforcement unit and plastic material of pallet body during change of temperature of pallet

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5453236A (en) * 1994-02-08 1995-09-26 Composite Design International, Inc. Method of molding a load bearing pallet from recycled materials
FR2868044A1 (en) * 2004-03-23 2005-09-30 Allibert Equipement Sa Handling device
FR2882730A1 (en) * 2005-03-02 2006-09-08 Allibert Equipement Sa Plastic pallet for handling heavy load, has absorption unit to absorb differential expansion between material of reinforcement unit and plastic material of pallet body during change of temperature of pallet

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