WO2014007723A1 - Packing laminate with joined outer layers - Google Patents

Packing laminate with joined outer layers Download PDF

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Publication number
WO2014007723A1
WO2014007723A1 PCT/SE2013/050734 SE2013050734W WO2014007723A1 WO 2014007723 A1 WO2014007723 A1 WO 2014007723A1 SE 2013050734 W SE2013050734 W SE 2013050734W WO 2014007723 A1 WO2014007723 A1 WO 2014007723A1
Authority
WO
WIPO (PCT)
Prior art keywords
outer layer
elements
layer
adhesive
packing laminate
Prior art date
Application number
PCT/SE2013/050734
Other languages
French (fr)
Inventor
Fredrik Rosenlind
Fred Åhlund
Original Assignee
Lamiflex Ab
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 Lamiflex Ab filed Critical Lamiflex Ab
Publication of WO2014007723A1 publication Critical patent/WO2014007723A1/en

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B37/00—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding
    • B32B37/14—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding characterised by the properties of the layers
    • B32B37/16—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding characterised by the properties of the layers with all layers existing as coherent layers before laminating
    • B32B37/22—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding characterised by the properties of the layers with all layers existing as coherent layers before laminating involving the assembly of both discrete and continuous layers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B27/00—Layered products comprising a layer of synthetic resin
    • B32B27/06—Layered products comprising a layer of synthetic resin as the main or only constituent of a layer, which is next to another layer of the same or of a different material
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B27/00—Layered products comprising a layer of synthetic resin
    • B32B27/32—Layered products comprising a layer of synthetic resin comprising polyolefins
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B29/00—Layered products comprising a layer of paper or cardboard
    • B32B29/002—Layered products comprising a layer of paper or cardboard as the main or only constituent of a layer, which is next to another layer of the same or of a different material
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B3/00—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar shape; Layered products comprising a layer having particular features of form
    • B32B3/02—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar shape; Layered products comprising a layer having particular features of form characterised by features of form at particular places, e.g. in edge regions
    • B32B3/08—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar shape; Layered products comprising a layer having particular features of form characterised by features of form at particular places, e.g. in edge regions characterised by added members at particular parts
    • B32B3/085—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar shape; Layered products comprising a layer having particular features of form characterised by features of form at particular places, e.g. in edge regions characterised by added members at particular parts spaced apart pieces on the surface of a layer
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B5/00—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts
    • B32B5/02—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by structural features of a fibrous or filamentary layer
    • B32B5/024—Woven fabric
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B5/00—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts
    • B32B5/02—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by structural features of a fibrous or filamentary layer
    • B32B5/028—Net structure, e.g. spaced apart filaments bonded at the crossing points
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B7/00—Layered products characterised by the relation between layers; Layered products characterised by the relative orientation of features between layers, or by the relative values of a measurable parameter between layers, i.e. products comprising layers having different physical, chemical or physicochemical properties; Layered products characterised by the interconnection of layers
    • B32B7/04—Interconnection of layers
    • B32B7/12—Interconnection of layers using interposed adhesives or interposed materials with bonding properties
    • B32B7/14—Interconnection of layers using interposed adhesives or interposed materials with bonding properties applied in spaced arrangements, e.g. in stripes
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65D—CONTAINERS 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
    • B65D81/00—Containers, packaging elements, or packages, for contents presenting particular transport or storage problems, or adapted to be used for non-packaging purposes after removal of contents
    • B65D81/02—Containers, packaging elements, or packages, for contents presenting particular transport or storage problems, or adapted to be used for non-packaging purposes after removal of contents specially adapted to protect contents from mechanical damage
    • B65D81/03—Wrappers or envelopes with shock-absorbing properties, e.g. bubble films
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
    • B29C65/02—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure
    • B29C65/08—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using ultrasonic vibrations
    • B29C65/083—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using ultrasonic vibrations using a rotary sonotrode or a rotary anvil
    • B29C65/085—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using ultrasonic vibrations using a rotary sonotrode or a rotary anvil using a rotary sonotrode
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/01—General aspects dealing with the joint area or with the area to be joined
    • B29C66/05—Particular design of joint configurations
    • B29C66/10—Particular design of joint configurations particular design of the joint cross-sections
    • B29C66/11—Joint cross-sections comprising a single joint-segment, i.e. one of the parts to be joined comprising a single joint-segment in the joint cross-section
    • B29C66/112—Single lapped joints
    • B29C66/1122—Single lap to lap joints, i.e. overlap joints
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/40—General aspects of joining substantially flat articles, e.g. plates, sheets or web-like materials; Making flat seams in tubular or hollow articles; Joining single elements to substantially flat surfaces
    • B29C66/41—Joining substantially flat articles ; Making flat seams in tubular or hollow articles
    • B29C66/43—Joining a relatively small portion of the surface of said articles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/40—General aspects of joining substantially flat articles, e.g. plates, sheets or web-like materials; Making flat seams in tubular or hollow articles; Joining single elements to substantially flat surfaces
    • B29C66/41—Joining substantially flat articles ; Making flat seams in tubular or hollow articles
    • B29C66/43—Joining a relatively small portion of the surface of said articles
    • B29C66/433—Casing-in, i.e. enclosing an element between two sheets by an outlined seam
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/80—General aspects of machine operations or constructions and parts thereof
    • B29C66/83—General aspects of machine operations or constructions and parts thereof characterised by the movement of the joining or pressing tools
    • B29C66/834—General aspects of machine operations or constructions and parts thereof characterised by the movement of the joining or pressing tools moving with the parts to be joined
    • B29C66/8341—Roller, cylinder or drum types; Band or belt types; Ball types
    • B29C66/83411—Roller, cylinder or drum types
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2262/00—Composition or structural features of fibres which form a fibrous or filamentary layer or are present as additives
    • B32B2262/10—Inorganic fibres
    • B32B2262/101—Glass fibres
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2307/00—Properties of the layers or laminate
    • B32B2307/70—Other properties
    • B32B2307/714—Inert, i.e. inert to chemical degradation, corrosion
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2553/00—Packaging equipment or accessories not otherwise provided for
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2553/00—Packaging equipment or accessories not otherwise provided for
    • B32B2553/02—Shock absorbing
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B37/00—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding
    • B32B37/12—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding characterised by using adhesives

Definitions

  • the present invention relates generally to a packing laminate.
  • packing material for packing of heavy objects to protect the heavy object against outer mechanical influence.
  • the packing material comprises packing laminate, an improved protection is achieved against mechanical influence on the packed object from the packing material itself.
  • One example of a packing laminate is disclosed in EP20751 18 A1 by the applicant.
  • distancing layer This is especially the case when the distancing layer is comprised by wooden fibreboard against which gluing is very sensitive against wetting, rain or moist. A detaching of the outer layer from the distancing layer will allow the laminate to move freely within the two layers leading to uncovered and unprotected areas of the heavy objects. Considering that the heavy objects protected by the packing laminate may be very valuable, there is a need for enhancing the protection of the heavy objects while still keeping the cost for manufacturing low.
  • An object of the present invention is to alleviate some of the disadvantages of the prior art and to provide an improved device for packing heavy objects, which is cheaper to manufacture.
  • Another objective of the present invention is to provide an improved device for packing heavy objects, which reduces the risk of a deteriorated protection when using the packing laminate in wet
  • a packing laminate comprising a first outer layer a distancing layer and a second outer layer, in which the distancing layer is comprised by a plurality of elements arranged adjacent to one another with a separating distance between them, between the first outer layer and the second outer layer, wherein each distancing layer comprises a first side facing the first outer layer and a second side facing the second outer layer, wherein the first outer layer and the second outer layer are fixedly joined together between the plurality of elements.
  • the joining of the outer layers will provide a more reliant protection in wet conditions, as the two layers are directly glued to each other, wherein the need to rely on a distancing layer-outer layer joining using glue with poor wet resisting capacity can be reduced.
  • the second side of the distancing layer is fixed to the second outer layer by an adhesive arranged between the second side of the distancing layer and the second outer layer, wherein the first side of the distancing layer and the first outer layer are adapted to be arranged in direct contact to each other.
  • the first outer layer and the second outer layer are fixedly joined together between a plurality of elements by an adhesive.
  • the first outer layer and the second outer layer are fixedly joined together between a plurality of elements by ultrasonic welding.
  • One advantage of entirely avoiding the use of glue by instead welding the two outer layers together will, besides the cost saving aspect, provide an even more reliable packing laminate product with further improved capacity to withstand, wet conditions, water, moist, humidity etc.
  • a method of manufacturing a packing laminate comprising the steps:
  • each element comprising a first and second side, the elements being arranged adjacent to each other with a separating distance between them, - pressing the first and second outer layers toward each other such that the first and second outer layers are fixedly joined together by the adhesive.
  • the first outer layer, the second outer layer and the plurality of elements are transported passed a roller nip comprised by a roller device having circumferentially arranged cams arranged at a distance from each other essentially corresponding to the width of the elements plus a separating distance between the plurality of elements, whereby pressure is applied to one of the first and second outer layers, whereby the first and second outer layers are pressed towards each other, whereby the first and second outer layers are joined together by the adhesive.
  • the pressing of the outer layers against each other using the roller will facilitate the joining process between the outer layers in a cheap manner.
  • a method further comprises:
  • One advantage of joining the two layers is that a reduced use of glue is enabled, for instance due to the use of glue in strings narrower than the width of each of the elements.
  • a method further comprises
  • said plurality of strings of adhesive are arranged on the first outer layer or the second outer layer so that after providing the plurality of elements between the first and second outer layers, a string of adhesive is left between a plurality of two consecutive elements.
  • An advantage of arranging glue in strings and not on the entire outer layer, is that a reduced use of glue is enabled in the manufacturing process. This is enabled by arranging glue in strings at least between a plurality of the outer layers.
  • a method further comprises the steps:
  • an ultrasonic welding device comprising ultrasonic welding units adapted to weld seams at a distance from each other essentially corresponding to the width of the elements plus a separating distance between the plurality of elements, whereby the first and second outer layers are welded together.
  • a method further comprises:
  • the second outer layer passed a pressure roller device, whereby the pressure roller device comprises a plurality of individual pressure rollers, whereby each consecutive pressure roller arranged at a distance from each other essentially corresponding to the width of the elements plus a separating distance between the plurality of elements.
  • An advantage of using a pressure roller device is that it further improves the joining of the two outer layers during the drying process of the glue.
  • the distancing layer is comprised by a first part element and a second part element, wherein the first part element is made of a lower hardness than the second part element.
  • the pressure rollers are suspended with springs, wherein the pressure rollers are biased to press against the first outer layer and/or the second outer layer.
  • Fig. 1 shows an exploded, perspective view of a packing laminate.
  • Fig. 2 shows a perspective view of a packing laminate with joined outer layers.
  • FIG. 3 shows a perspective view of a device for manufacturing a packing laminate according to Fig. 1 , or Fig. 2.
  • FIG. 4 shows a perspective view of a device for manufacturing a packing laminate according to Fig. 1 or Fig. 2.
  • FIG. 5 shows a perspective view of a device for manufacturing a packing laminate according to Fig. 1 or Fig. 2.
  • Fig. 1 shows an exploded, perspective view of a packing laminate 1 .
  • the packing laminate 1 is adapted for packing cylindrical objects, for instance heavy objects such as rolls of enameled plate.
  • the packing laminate comprises a first outer layer 2, a second outer layer 3, and a distancing layer 4 arranged between the first outer layer 2 and the second outer layer 3.
  • the distancing layer 4 comprises a plurality of elements 5 arranged adjacent or side by side or next to each other with a slight separating distance 5c between them.
  • the plurality of elements 5 each have an elongated and flat shape comprising a first side 5a and a second side 5b.
  • the elongated elements having a length 5d extending in a first y-direc ⁇ ion and a width 5e extending in a second x- direction with using the coordinate system defined in Fig, 1.
  • the distancing layer 4 and thus the plurality of elements 5 comprises a first side 4a, 5a facing the first outer layer 2, and a second side 4b, 5b facing the second outer layer 3.
  • the distancing layer 4 and elements 5 may comprise several layers of material, i.e. part elements for instance of different height or hardness for achieving a desired height and protection of the object to be packed and protected.
  • the softer part element is arranged closer to the objected to be packed and protected to reduce the risk of damaging said object.
  • a plurality of strings 6a, 6b, 6c of adhesive 6 have been arranged on the second outer layer 3, wherein a first string of adhesive 6a is arranged on a position corresponding to a central portion of the element 5, a second string of adhesive 6b is arranged on a position corresponding to one side of the element 5, between two consecutive elements 5, and a third string 6c of adhesive 6c is arranged on a position corresponding to the other side of the element 5, between two consecutive elements 5.
  • the first string of adhesive is narrower than the width of the element 5.
  • the second and third strings 6b, 6c are narrower than the separating distance 5c between two consecutive elements 5.
  • adhesive strings 6b, 6c are arranged respectively between at least a plurality of two consecutive elements 5.
  • adhesive strings are arranged respectively between each two consecutive elements 5.
  • the entire surface of the second outer layer 3 is covered by adhesive 6.
  • only adhesive strings 6a, i.e. strings located to fixate the element 5 to the second outer layer 3 have been arranged on the second outer layer, leaving adhesive strings 6b, 6c between each of a plurality of two consecutive elements 5 out.
  • the elements 5 of the distancing layer 4 can have a width in the x-direc ⁇ ion within the range of 40-80 mm, preferably 50-70 mm, more preferably 60 mm.
  • the separating distance 5c between two adjacent elements 5 is preferably in the range 3-10 mm, more preferably 4-6 mm and even more preferably 5 mm.
  • Fig.2 shows a perspective view of a packing laminate wherein the first and second outer layers have been fixedly joined together between at least a plurality of two consecutive elements 5.
  • the second side 4b, 5b of the distancing layer 4/element 5 is fixed to the second outer layer 3 by an adhesive 6 arranged between the second side 4b, 5b of the distancing layer 4/element 5 and the second outer layer 3, wherein the first side 4a, 5a of the distancing layer 4/element 5, and the first outer layer 2 are adapted to be arranged in direct contact to each other, wherein no adhesive or other material is arranged there between.
  • first outer layer 2 and the second outer layer 3 are fixedly joined together by ultrasonic welding.
  • adhesive strings 6a i.e. strings located to fixate the element 5 to the second outer layer 3 have been left out wherein only adhesive strings between each of a plurality of two consecutive elements 5 have been provided to fixedly join the first 2 and second 3 outer layers together and fixate the elements 5 in relation to the first and second outer layers.
  • adhesive strings 6a i.e. strings located to fixate the element 5 to the second outer layer 3 have been left out wherein ultrasonic welding is used to fixedly join the first 2 and second 3 outer layers together and fixate the elements 5 in relation to the first 2 and second 3 outer layers.
  • Fig. 3 shows a perspective view of at least a section of a device 7 for manufacturing a packing laminate 1.
  • the device 7 comprises an adhesive applying device 9, comprising a ⁇ least one adhesive applying device unit 9a, 9b adapted to apply adhesive onto the first outer layer 2 or the second outer layer 3, wherein the first adhesive applying device unit 9a is adapted to apply adhesive onto the first outer layer 2 and the second adhesive applying unit 9b is adapted to apply adhesive onto the second outer layer 3.
  • the adhesive applying device 9, 9a, 9b comprises a plurality of nozzles adapted for applying the adhesive strings 6a, 6b, 6c onto the first and second outer layers 2, 3.
  • the first outer layer 2 is adapted to be rollingly engaged by the outer surface 10a of a first roller 10, wherein the first roller 10 may also be adapted to transport or feed the first outer layer 3 during manufacturing.
  • the second outer layer 3 is adapted to be rollingly engaged by an outer surface 1 1 a of a second roller 1 1 , wherein the second roller 1 1 may also be adapted to transport or feed the first outer layer 3 during manufacturing.
  • the distancing layer 4, i.e. the plurality of aligned elements 5, are provided by being transported between the first roller 10 and the second roller 1 1 .
  • the plurality of aligned elements 5 are also fed between the first and second outer layers 2, 3.
  • the first and second outer layers 2, 3 are being pressed together by the first and second roller due to the arrangement of the first and second rollers 10, 1 1.
  • a section of either the first or second outer layer 2, 3 is being provided with adhesive 6 by the adhesive applying device 9, 9a, 9b prior to being fed or transported into a position between the first and second rollers 10, 1 1 and passing the same.
  • At least one of the rollers 10, 1 1 is a roller nip 12, wherein the roller nip 12 comprises circumferentially arranged cams 12a arranged at a distance from each other in an axial direction of the roller, corresponding to the width 5e of the elements 5 plus the distance 5c between the plurality of elements 5.
  • the first and second rollers 10, 1 1 have diameter of 250 mm and a length in the axial direction of 1600 mm.
  • the diameter of the roller 10, 1 1 at the point of the cams 12a is preferably in the range of 250 mm to 260 mm, more preferably 257 mm.
  • the width of the cams in an axial direction of the rollers 10, 1 1 are preferably in the range between 1 -10 mm, more preferably 6 mm.
  • the first roller 10 is provided as a roller nip 12 if the adhesive 6 is applied on the first outer layer 2, and correspondingly, the second roller 1 1 is provided as the roller nip 12 if the adhesive 6 is applied on the second outer layer 3.
  • pressure is applied to one of the first and second outer layers 2, 3 in a direction perpendicular to the plane of the layers 2, 3, whereby the first and second outer layers 2, 3 are pressed towards each other, whereby the first and second outer layer 2, 3 are fixedly joined together due to the adhesive string 6, 6b, 6c between them.
  • both the first and second rollers 10, 1 1 have flat surfaces, wherein a roller nip 12 is provided past the rollers 10, 1 1 in the feeding direction.
  • a pressure roller device 13 is provided at a certain distance past the two rollers 10, 1 1 .
  • the pressure roller device 13 comprises a plurality of individual pressure rollers 13a. Each consecutive pressure roller 13a is arranged at a distance from each other corresponding to the width 5e of the elements 5 plus the distance 5c between the plurality of elements 5 in the second width direction x of the elements 5. The width of the actual pressure roller 13a is less than the distance 5c between the elements 5.
  • the pressure rollers 13a are suspended with springs 14, such as for instance plate or leaf springs 14. The pressure rollers 13a are thus adapted and biased to press the first and second outer layers 2, 3 toward each other.
  • Fig. 5 shows an ultrasonic welding device 15, arranged past the rollers 10, 1 1 in the feeding direction of the first and second outer layers 2, 3 and the elements 5.
  • the ultrasonic welding device 15 comprises an ultrasonic unit 15a arranged below the second outer layer 3, and adapted ⁇ o be in contact with the second outer layer 3.
  • An example of an ultrasonic welding unit 15a is for instance known through UWG-35 provided by Swiss Sonic.
  • the ultrasonic welding unit 35 has an elongated nozzle in order to weld a plurality of seems.
  • the ultrasonic welding device 15 further comprises arranged past the rollers 10, 1 1 in the feeding direction of the first and second outer layers 2, 3 and the elements 5.
  • the ultrasonic welding device 15 comprises an ultrasonic unit 15a arranged below the second outer layer 3, and adapted ⁇ o be in contact with the second outer layer 3.
  • An example of an ultrasonic welding unit 15a is for instance known through UWG-35 provided by Swiss Sonic.
  • the ultrasonic welding unit 35 has an elongated
  • the rolling anvils 15b comprises rolling anvils 15b, with cams 15c arranged a distance from each other corresponding to the width 5e of the elements 5 plus the distance 5c between the plurality of elements 5 in the second width direction x of the elements 5.
  • the rolling anvils 15b are rotatably arranged on the side of the first outer layer 2, and are adapted to be in contact with the first outer layer 2.
  • the rolling anvils 15b with cams 15c applies a counter acting force, preferably inelastically, against the welding surface of the ultrasonic welding unit 15a between the elements 5.
  • the ultrasonic welding device is driven by an ultrasonic generator (not shown), for instance Boa 35 kHz provided by Swiss Sonic.
  • the outer layers 2, 3 are both comprised by the same polyolefin, i.e. for instance polyethylene.
  • the distance between the ultrasonic welding unit 15a and the rolling anvils 15b are exactly adjusted in relation to the thickness of the outer layers 2, 3.
  • the distance between the ultrasonic welding unit 15a and the rolling anvils is less than the
  • the ultrasonic welding device 15 applies an adjusted amplitude in relation to the material of the outer layers 2, 3 such that sufficient internal friction in the outer layer material.
  • the outer layers 2, 3 can be made of some form of paper, for example Kraft paper.
  • the outer layers can comprise plastic covered paper or consist of plastic such as polyethylene or polypropylene. Additional reinforcement in the form of armouring with fibre mesh can also be applied.
  • This mesh can consist of glass fibre and can be arranged between a paper layer and a plastics layer, or can be arranged within either of these layers.
  • a woven fabric can be used instead of a mesh.
  • the paper can also contain a corrosion inhibitor for protecting packaged goods against corrosive attack. Examples of suitable corrosion inhibitors are RPC (Rust Preventing Chemical) and VCI (Volatile Corrosion Inhibitor).
  • the adhesive 6, 6a, 6b, 6c is comprised by glue, preferably by hot-melt adhesive.
  • the distancing layer 4 and thus each of the elements 5 comprises two part elements (not shown) made of fibreboard, such as for instance wooden fibreboard, arranged on top of each other in a direction perpendicular to the plane defined by the x and y directions, and preferably glued together using water-based wet adhesive.
  • the part elements are made of material of different hardness whereby the protective capacity of the packaging laminate 1 may be improved.
  • the packing laminate 1 is arranged on the protected object such that the material of lower hardness is arranged closer to said object.
  • the part distancing layer 4 and part elements are comprised by fibreboard.
  • the harder part element may comprise hard fibreboard and have a density of at least 800 kg/m 3
  • the softer part element may comprise porous fibreboard and have a density of below 350 kg/ m 3 .

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  • Engineering & Computer Science (AREA)
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  • Mechanical Engineering (AREA)
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Abstract

A packing laminate comprising a first outer layer a distancing layer and a second outer layer, in which the distancing layer is comprised by a plurality of elements arranged adjacent to one another with a separating distance between them, between the first outer layer and the second outer layer, wherein each distancing layer comprises a first side facing the first outer layer and a second side facing the second outer layer, wherein the first outer layer and the second outer layer are fixedly joined together between the plurality of elements. The joining of the outer layers will provide a more reliant protection in wet conditions, as the two layers are directly glued to each other, wherein the need to rely on a distancing layer-outer layer joining using glue with poor wet resisting capacity can be reduced.

Description

PACKING LAMINATE WITH JOINED OUTER LAYERS
Technical field
[0001 ] The present invention relates generally to a packing laminate. Background art
[0002] In prior art it is known to use packing material for packing of heavy objects to protect the heavy object against outer mechanical influence. If the packing material comprises packing laminate, an improved protection is achieved against mechanical influence on the packed object from the packing material itself. One example of a packing laminate is disclosed in EP20751 18 A1 by the applicant.
[0003] It is further known through US2217773 to use packing material for book covers wherein rigid strips of card board are covered by two layers of covering material such as fabric, leather or paper. The covering material, and card board are properly pasted and glued whereafter a plate E with a pad R of soft and resilient material, such as a spongy rubber is applied against the card board strips and covering material wherein the soft material is able to penetrate between the ribs of the cover and allow the outer layers of covering material to adhere to each other.
[0004] The problem associated with packing laminate according to the art is that there is a risk that the outer layers detach from the spacing layer or distancing layer in wet conditions, for instance if the protected heavy objects are exposed to wet, rain or moist at any stage during transportation or storing, causing a release of the glue between outer layers and
distancing layer. This is especially the case when the distancing layer is comprised by wooden fibreboard against which gluing is very sensitive against wetting, rain or moist. A detaching of the outer layer from the distancing layer will allow the laminate to move freely within the two layers leading to uncovered and unprotected areas of the heavy objects. Considering that the heavy objects protected by the packing laminate may be very valuable, there is a need for enhancing the protection of the heavy objects while still keeping the cost for manufacturing low.
Unsuccessful and expensive attempts to delimitate the risk of outer layers detaching from the distancing layer has involved the heavy use of adhesive to fixate the outer layers onto the distancing layer.
Summary of invention
[0005] An object of the present invention is to alleviate some of the disadvantages of the prior art and to provide an improved device for packing heavy objects, which is cheaper to manufacture.
[0006] Another objective of the present invention is to provide an improved device for packing heavy objects, which reduces the risk of a deteriorated protection when using the packing laminate in wet
conditions.
[0007] In a first aspect there is provided a packing laminate comprising a first outer layer a distancing layer and a second outer layer, in which the distancing layer is comprised by a plurality of elements arranged adjacent to one another with a separating distance between them, between the first outer layer and the second outer layer, wherein each distancing layer comprises a first side facing the first outer layer and a second side facing the second outer layer, wherein the first outer layer and the second outer layer are fixedly joined together between the plurality of elements. The joining of the outer layers will provide a more reliant protection in wet conditions, as the two layers are directly glued to each other, wherein the need to rely on a distancing layer-outer layer joining using glue with poor wet resisting capacity can be reduced.
[0008] According to one embodiment, the second side of the distancing layer is fixed to the second outer layer by an adhesive arranged between the second side of the distancing layer and the second outer layer, wherein the first side of the distancing layer and the first outer layer are adapted to be arranged in direct contact to each other. A direct contact between the first outer layer and the distancing layer, i.e. wherein no adhesive is applied in between to join the layers, a large amount of glue can be saved in the manufacturing process still achieving a packing laminate with improved ability to withstand wet.
[0009] According to one embodiment, the first outer layer and the second outer layer are fixedly joined together between a plurality of elements by an adhesive.
[0010] According to another embodiment, the first outer layer and the second outer layer are fixedly joined together between a plurality of elements by ultrasonic welding. One advantage of entirely avoiding the use of glue by instead welding the two outer layers together will, besides the cost saving aspect, provide an even more reliable packing laminate product with further improved capacity to withstand, wet conditions, water, moist, humidity etc.
[001 1 ] According to another embodiment, a method of manufacturing a packing laminate is provided, comprising the steps:
- providing a first outer layer
- providing a second outer layer,
- providing adhesive on the first outer layer,
- providing a plurality of elongated elements between the first and second outer layers, each element comprising a first and second side, the elements being arranged adjacent to each other with a separating distance between them, - pressing the first and second outer layers toward each other such that the first and second outer layers are fixedly joined together by the adhesive.
[0012] According to another embodiment, the first outer layer, the second outer layer and the plurality of elements are transported passed a roller nip comprised by a roller device having circumferentially arranged cams arranged at a distance from each other essentially corresponding to the width of the elements plus a separating distance between the plurality of elements, whereby pressure is applied to one of the first and second outer layers, whereby the first and second outer layers are pressed towards each other, whereby the first and second outer layers are joined together by the adhesive. The pressing of the outer layers against each other using the roller will facilitate the joining process between the outer layers in a cheap manner.
[0013] According to one embodiment, a method further comprises:
- transporting the first outer layer, whereby the first outer layer passes between a first roller device and a second roller device,
- transporting the second outer layer, whereby the second outer layer passes between the first roller device and the second roller device
- providing a plurality of strings of adhesive on the first outer layer or the second outer layer prior to passing the between the first and second roller devices whereby the strings of adhesive extend in the direction of movement of the first outer layer or the second outer layer, whereby the strings of adhesive are narrower than the width of each of the elements,
- Providing the plurality of elements respectively on a string of
adhesive on the first outer layer or the second outer layer, whereby the first side of the elements faces the first outer layer, whereby the plurality of elements extend in the movement direction of the first outer layer in their elongated direction,
- pressing the first and second outer layers towards each other by the aid of the first roller device ( 10) and the second roller device ( 1 1 ), wherein the first roller device or the second roller device comprises the roller nip.
[0014] One advantage of joining the two layers is that a reduced use of glue is enabled, for instance due to the use of glue in strings narrower than the width of each of the elements.
[0015] According to one embodiment, a method further comprises
- said plurality of strings of adhesive are arranged on the first outer layer or the second outer layer so that after providing the plurality of elements between the first and second outer layers, a string of adhesive is left between a plurality of two consecutive elements.
[0016] An advantage of arranging glue in strings and not on the entire outer layer, is that a reduced use of glue is enabled in the manufacturing process. This is enabled by arranging glue in strings at least between a plurality of the outer layers.
[001 7] According to one embodiment, a method further comprises the steps:
- transporting the first outer layer, the plurality of elements, and the second outer layer passed an ultrasonic welding device comprising ultrasonic welding units adapted to weld seams at a distance from each other essentially corresponding to the width of the elements plus a separating distance between the plurality of elements, whereby the first and second outer layers are welded together.
[0018] One advantage of entirely avoiding the use of glue by instead welding the two outer layers together will, besides the cost saving aspect, provide an even more reliable packing laminate product with further improved capacity to withstand, wet conditions, water, moist, humidity etc.
[0019] According to one embodiment, a method further comprises:
- transporting the first outer layer, the plurality of elements, and the
second outer layer passed a pressure roller device, whereby the pressure roller device comprises a plurality of individual pressure rollers, whereby each consecutive pressure roller arranged at a distance from each other essentially corresponding to the width of the elements plus a separating distance between the plurality of elements.
[0020] An advantage of using a pressure roller device is that it further improves the joining of the two outer layers during the drying process of the glue.
[0021 ] According to one embodiment, the distancing layer is comprised by a first part element and a second part element, wherein the first part element is made of a lower hardness than the second part element.
[0022] According to one embodiment, the pressure rollers are suspended with springs, wherein the pressure rollers are biased to press against the first outer layer and/or the second outer layer.
Brief description of drawings
[0023] The invention is now described, by way of example, with reference to the accompanying drawings, in which: [0024] Fig. 1 shows an exploded, perspective view of a packing laminate.
[0025] Fig. 2 shows a perspective view of a packing laminate with joined outer layers.
[0026] Fig. 3 shows a perspective view of a device for manufacturing a packing laminate according to Fig. 1 , or Fig. 2.
[0027] Fig. 4 shows a perspective view of a device for manufacturing a packing laminate according to Fig. 1 or Fig. 2.
[0028] Fig. 5 shows a perspective view of a device for manufacturing a packing laminate according to Fig. 1 or Fig. 2.
Description of embodiments
[0029] In the drawing figures, like reference numerals designate identical or corresponding elements throughout the several figures. It will be appreciated that these figures are for illustration only and are not in any way restricting the scope of the invention.
[0030] Fig. 1 shows an exploded, perspective view of a packing laminate 1 . According to one embodiment, the packing laminate 1 is adapted for packing cylindrical objects, for instance heavy objects such as rolls of enameled plate. The packing laminate comprises a first outer layer 2, a second outer layer 3, and a distancing layer 4 arranged between the first outer layer 2 and the second outer layer 3. The distancing layer 4 comprises a plurality of elements 5 arranged adjacent or side by side or next to each other with a slight separating distance 5c between them. The plurality of elements 5 each have an elongated and flat shape comprising a first side 5a and a second side 5b. The elongated elements having a length 5d extending in a first y-direc†ion and a width 5e extending in a second x- direction with using the coordinate system defined in Fig, 1. The distancing layer 4 and thus the plurality of elements 5 comprises a first side 4a, 5a facing the first outer layer 2, and a second side 4b, 5b facing the second outer layer 3. According to one embodiment, the distancing layer 4 and elements 5, may comprise several layers of material, i.e. part elements for instance of different height or hardness for achieving a desired height and protection of the object to be packed and protected. Preferably, the softer part element is arranged closer to the objected to be packed and protected to reduce the risk of damaging said object. A plurality of strings 6a, 6b, 6c of adhesive 6 have been arranged on the second outer layer 3, wherein a first string of adhesive 6a is arranged on a position corresponding to a central portion of the element 5, a second string of adhesive 6b is arranged on a position corresponding to one side of the element 5, between two consecutive elements 5, and a third string 6c of adhesive 6c is arranged on a position corresponding to the other side of the element 5, between two consecutive elements 5. According to one embodiment, the first string of adhesive is narrower than the width of the element 5.
According to one embodiment, the second and third strings 6b, 6c are narrower than the separating distance 5c between two consecutive elements 5. According to one embodiment, adhesive strings 6b, 6c are arranged respectively between at least a plurality of two consecutive elements 5. According to one embodiment, adhesive strings are arranged respectively between each two consecutive elements 5. According to one embodiment, the entire surface of the second outer layer 3 is covered by adhesive 6. According to one embodiment, only adhesive strings 6a, i.e. strings located to fixate the element 5 to the second outer layer 3 have been arranged on the second outer layer, leaving adhesive strings 6b, 6c between each of a plurality of two consecutive elements 5 out. According to one embodiment, the elements 5 of the distancing layer 4 can have a width in the x-direc†ion within the range of 40-80 mm, preferably 50-70 mm, more preferably 60 mm. The separating distance 5c between two adjacent elements 5 is preferably in the range 3-10 mm, more preferably 4-6 mm and even more preferably 5 mm.
[0031 ] Fig.2 shows a perspective view of a packing laminate wherein the first and second outer layers have been fixedly joined together between at least a plurality of two consecutive elements 5. The second side 4b, 5b of the distancing layer 4/element 5 is fixed to the second outer layer 3 by an adhesive 6 arranged between the second side 4b, 5b of the distancing layer 4/element 5 and the second outer layer 3, wherein the first side 4a, 5a of the distancing layer 4/element 5, and the first outer layer 2 are adapted to be arranged in direct contact to each other, wherein no adhesive or other material is arranged there between. Theoretically, there may be a possibility to slightly move the first outer layer 2 in relation to the distancing layer 4/element 5 at section of the first outer layer 2 which is in direct contact with the distancing layer 4. According to one embodiment, wherein adhesive 6b, 6c strings between each of a plurality of two consecutive elements 5 have been left out, the first outer layer 2 and the second outer layer 3 are fixedly joined together by ultrasonic welding.
According to one embodiment, adhesive strings 6a, i.e. strings located to fixate the element 5 to the second outer layer 3 have been left out wherein only adhesive strings between each of a plurality of two consecutive elements 5 have been provided to fixedly join the first 2 and second 3 outer layers together and fixate the elements 5 in relation to the first and second outer layers. According to one embodiment, adhesive strings 6a, i.e. strings located to fixate the element 5 to the second outer layer 3 have been left out wherein ultrasonic welding is used to fixedly join the first 2 and second 3 outer layers together and fixate the elements 5 in relation to the first 2 and second 3 outer layers.
[0032] Fig. 3 shows a perspective view of at least a section of a device 7 for manufacturing a packing laminate 1. The device 7 comprises an adhesive applying device 9, comprising a† least one adhesive applying device unit 9a, 9b adapted to apply adhesive onto the first outer layer 2 or the second outer layer 3, wherein the first adhesive applying device unit 9a is adapted to apply adhesive onto the first outer layer 2 and the second adhesive applying unit 9b is adapted to apply adhesive onto the second outer layer 3. According to one embodiment, the adhesive applying device 9, 9a, 9b comprises a plurality of nozzles adapted for applying the adhesive strings 6a, 6b, 6c onto the first and second outer layers 2, 3. As can be seen in the Fig.3, the first outer layer 2 is adapted to be rollingly engaged by the outer surface 10a of a first roller 10, wherein the first roller 10 may also be adapted to transport or feed the first outer layer 3 during manufacturing. Similarly, the second outer layer 3 is adapted to be rollingly engaged by an outer surface 1 1 a of a second roller 1 1 , wherein the second roller 1 1 may also be adapted to transport or feed the first outer layer 3 during manufacturing. The distancing layer 4, i.e. the plurality of aligned elements 5, are provided by being transported between the first roller 10 and the second roller 1 1 . As the first and second outer layers are fed between and pass the first and second rollers 10, 1 1 , the plurality of aligned elements 5 are also fed between the first and second outer layers 2, 3. During passing, the first and second outer layers 2, 3 are being pressed together by the first and second roller due to the arrangement of the first and second rollers 10, 1 1. A section of either the first or second outer layer 2, 3 is being provided with adhesive 6 by the adhesive applying device 9, 9a, 9b prior to being fed or transported into a position between the first and second rollers 10, 1 1 and passing the same.
[0033] As can be seen in Fig. 4, according to one embodiment, at least one of the rollers 10, 1 1 is a roller nip 12, wherein the roller nip 12 comprises circumferentially arranged cams 12a arranged at a distance from each other in an axial direction of the roller, corresponding to the width 5e of the elements 5 plus the distance 5c between the plurality of elements 5. According†o one embodiment, the first and second rollers 10, 1 1 have diameter of 250 mm and a length in the axial direction of 1600 mm. The diameter of the roller 10, 1 1 at the point of the cams 12a is preferably in the range of 250 mm to 260 mm, more preferably 257 mm. The width of the cams in an axial direction of the rollers 10, 1 1 are preferably in the range between 1 -10 mm, more preferably 6 mm. According to one embodiment, the first roller 10 is provided as a roller nip 12 if the adhesive 6 is applied on the first outer layer 2, and correspondingly, the second roller 1 1 is provided as the roller nip 12 if the adhesive 6 is applied on the second outer layer 3. By means of this roller nip 12, pressure is applied to one of the first and second outer layers 2, 3 in a direction perpendicular to the plane of the layers 2, 3, whereby the first and second outer layers 2, 3 are pressed towards each other, whereby the first and second outer layer 2, 3 are fixedly joined together due to the adhesive string 6, 6b, 6c between them. According to one embodiment, both the first and second rollers 10, 1 1 have flat surfaces, wherein a roller nip 12 is provided past the rollers 10, 1 1 in the feeding direction. At a certain distance past the two rollers 10, 1 1 , a pressure roller device 13 is provided. The pressure roller device 13 comprises a plurality of individual pressure rollers 13a. Each consecutive pressure roller 13a is arranged at a distance from each other corresponding to the width 5e of the elements 5 plus the distance 5c between the plurality of elements 5 in the second width direction x of the elements 5. The width of the actual pressure roller 13a is less than the distance 5c between the elements 5. The pressure rollers 13a are suspended with springs 14, such as for instance plate or leaf springs 14. The pressure rollers 13a are thus adapted and biased to press the first and second outer layers 2, 3 toward each other.
[0034] Fig. 5 shows an ultrasonic welding device 15, arranged past the rollers 10, 1 1 in the feeding direction of the first and second outer layers 2, 3 and the elements 5. The ultrasonic welding device 15 comprises an ultrasonic unit 15a arranged below the second outer layer 3, and adapted †o be in contact with the second outer layer 3. An example of an ultrasonic welding unit 15a is for instance known through UWG-35 provided by Swiss Sonic. The ultrasonic welding unit 35 has an elongated nozzle in order to weld a plurality of seems. The ultrasonic welding device 15 further
comprises rolling anvils 15b, with cams 15c arranged a distance from each other corresponding to the width 5e of the elements 5 plus the distance 5c between the plurality of elements 5 in the second width direction x of the elements 5. The rolling anvils 15b are rotatably arranged on the side of the first outer layer 2, and are adapted to be in contact with the first outer layer 2. The rolling anvils 15b with cams 15c applies a counter acting force, preferably inelastically, against the welding surface of the ultrasonic welding unit 15a between the elements 5. The ultrasonic welding device is driven by an ultrasonic generator (not shown), for instance Boa 35 kHz provided by Swiss Sonic. According to one embodiment, the outer layers 2, 3 are both comprised by the same polyolefin, i.e. for instance polyethylene. According to one embodiment, the distance between the ultrasonic welding unit 15a and the rolling anvils 15b are exactly adjusted in relation to the thickness of the outer layers 2, 3. Preferably, the distance between the ultrasonic welding unit 15a and the rolling anvils is less than the
thickness of the thickest of the two outer layers to be joined. According to one embodiment, the ultrasonic welding device 15 applies an adjusted amplitude in relation to the material of the outer layers 2, 3 such that sufficient internal friction in the outer layer material.
[0035] According to one embodiment, the outer layers 2, 3 can be made of some form of paper, for example Kraft paper. According to one embodiment, the outer layers can comprise plastic covered paper or consist of plastic such as polyethylene or polypropylene. Additional reinforcement in the form of armouring with fibre mesh can also be applied. This mesh can consist of glass fibre and can be arranged between a paper layer and a plastics layer, or can be arranged within either of these layers. A woven fabric can be used instead of a mesh. The paper can also contain a corrosion inhibitor for protecting packaged goods against corrosive attack. Examples of suitable corrosion inhibitors are RPC (Rust Preventing Chemical) and VCI (Volatile Corrosion Inhibitor).
[0036] According to one embodiment, the adhesive 6, 6a, 6b, 6c is comprised by glue, preferably by hot-melt adhesive.
[0037] According to one embodiment, the distancing layer 4 and thus each of the elements 5 comprises two part elements (not shown) made of fibreboard, such as for instance wooden fibreboard, arranged on top of each other in a direction perpendicular to the plane defined by the x and y directions, and preferably glued together using water-based wet adhesive. The part elements are made of material of different hardness whereby the protective capacity of the packaging laminate 1 may be improved. Preferably, the packing laminate 1 is arranged on the protected object such that the material of lower hardness is arranged closer to said object. According to one embodiment, the part distancing layer 4 and part elements are comprised by fibreboard. The harder part element may comprise hard fibreboard and have a density of at least 800 kg/m3, wherein the softer part element may comprise porous fibreboard and have a density of below 350 kg/ m3.
[0038] A preferred embodiment of packaging material according to the invention has been described. However, the person skilled in the art realizes that this can be varied within the scope of the appended claims without departing from the inventive idea.
All the described alternative embodiments above or parts of an
embodiment can be freely combined without departing from the inventive idea as long as the combination is not contradictory.

Claims

1 . A packing laminate ( 1 ) comprising a first outer layer (2) a
distancing layer (4) and a second outer layer (3), in which the distancing layer (4) is comprised by a plurality of elements (5) arranged adjacent to one another with a separating distance (5c) between them, between the first outer layer (2) and the second outer layer (3), wherein each distancing layer (4) comprises a first side (4a) facing the first outer layer (2) and a second side (4b) facing the second outer layer, characterized in that the first outer layer (2) and the second outer layer (3) are fixedly joined together between the plurality of elements (5) and that the second side (4b) of the distancing layer (4) is fixed to the second outer layer (3) by an adhesive (6, 6a, 6b, 6c) .
2. A packing laminate ( 1 ) according to claim 1 , characterized in that the first side (4a) of the distancing layer (4) and the first outer layer (2) are adapted to be arranged in direct contact to each other.
3. A packing laminate (1 ) according to claim 1 or 2, characterized in that the first outer layer (2) and the second outer layer (3) are fixedly joined together between a plurality of elements (5) by an adhesive (6, 6a, 6b, 6c) .
4. A packing laminate (1 ) according to any of the previous claims 1 or 2, characterized in that the first outer layer (2) and the second outer layer (3) are fixedly joined together between a plurality of elements (5) by ultrasonic welding.
5. A method of manufacturing a packing laminate (1 ), comprising the steps:
- providing a first outer layer (2) - providing a second outer layer (3),
- providing adhesive (6, 6a, 6b, 6c) on the first outer layer (2),
- providing a plurality of elongated elements (5) between the first and second outer layers (2, 3), each element (5) comprising a first (5a) and second side (5b), the elements (5) being arranged adjacent to each other with a separating distance (5c) between them,
- pressing the first and second outer layers (2, 3) toward each other such that the first and second outer layers are fixedly joined together by the adhesive (6, 6a, 6b, 6c).
6. A method of manufacturing a packing laminate (1 ) according to claim 5, whereby:
- the first outer layer (2), the second outer layer (3) and the plurality of elements are transported passed a roller nip (12) comprised by a roller device ( 10) having circumferentially arranged cams (12a) arranged at a distance from each other essentially corresponding to the width (5e) of the elements (5) plus a separating distance (5c) between the plurality of elements (5), whereby pressure is applied to one of the first and second outer layers, whereby the first and second outer layers (2, 3) are pressed towards each other, whereby the first and second outer layers are joined together by the adhesive (6, 6a, 6b, 6c).
7. A method of manufacturing a packing laminate (1 ) according to claim 5, whereby:
- transporting the first outer layer (2), whereby the first outer layer (2) passes between a first roller device ( 10) and a second roller device - transporting the second outer layer (3), whereby the second outer layer (3) passes between the first roller device ( 10) and the second roller device (1 1 )
- providing a plurality of strings of adhesive (6, 6a, 6b, 6c) on the first outer layer (2) or the second outer layer (3) prior to passing the between the first and second roller devices (10, 1 1 ) whereby the strings of adhesive (6, 6a, 6b, 6c) extend in the direction of
movement of the first outer layer (2) or the second outer layer (3), whereby the strings of adhesive are narrower than the width (5e) of each of the elements (5),
- Providing the plurality of elements respectively on a string of
adhesive (6a) on the first outer layer (2) or the second outer layer (3), whereby the first side (5a) of the elements (5) faces the first outer layer (2), whereby the plurality of elements (5) extend in the
movement direction of the first outer layer (2) in their elongated direction,
- pressing the first and second outer layers towards each other by the aid of the first roller device ( 10) and the second roller device ( 1 1 ), wherein the first roller device or the second roller device comprises the roller nip (12) .
8. A method of manufacturing a packing laminate (1 ) according to any of the any of the previous claims 5-7, whereby
- said plurality of strings of adhesive (6, 6a, 6b, 6c) are arranged on the first outer layer (2) or the second outer layer (3) so that after providing the plurality of elements (5) between the first and second outer layers (2, 3), a string of adhesive (6b) is left between a plurality of two consecutive elements (5).
9. A method of manufacturing a packing laminate according to claim 5, further comprising the steps:
- transporting the first outer layer (2), the plurality of elements (5), and the second outer layer (3) passed an ultrasonic welding device (15) comprising ultrasonic welding units ( 15a) adapted to weld seams at a distance from each other essentially corresponding to the width (5e) of the elements (5) plus a separating distance (5c) between the plurality of elements (5), whereby the first (2) and second outer layers (3) are welded together.
10. A method of manufacturing a packing laminate according to any of the previous claims 5-9, whereby,
- transporting the first outer layer (2), the plurality of elements (5), and the second outer layer (3) passed a pressure roller device (13), whereby the pressure roller device (13) comprises a plurality of individual pressure rollers (13a), whereby each consecutive pressure roller ( 13a) arranged at a distance from each other essentially corresponding to the width (5e) of the elements (5) plus a separating distance (5c) between the plurality of elements (5).
1 1. A packing laminate according to any of the previous claims, characterized in that the distancing layer (4) is comprised by a first part element and a second part element, wherein the first part element is made of a lower hardness than the second part element.
12. A packing laminate according to any of the previous claims, characterized in that the pressure rollers are suspended with springs, wherein the pressure rollers are biased to press against the first outer layer (2) and/or the second outer layer (3).
PCT/SE2013/050734 2012-07-05 2013-06-19 Packing laminate with joined outer layers WO2014007723A1 (en)

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SE1250778-6 2012-07-05
SE1250778 2012-07-05

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Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2217773A (en) * 1938-09-22 1940-10-15 Selva Luigi Ruggero Manufacture of covers for books or the like
US3674583A (en) * 1970-10-26 1972-07-04 Int Paper Co Method for the preparation of integrated nettings and laminates
GB1338452A (en) * 1972-05-16 1973-11-21 Flexipane Ltd Reinforced flexible plastics sheeting
GB1522432A (en) * 1976-10-21 1978-08-23 Ruggeri V Method of moulding hollow stiffeners or lightweight laminates or wholly box girdered laminates in fibre reinforced plastics
US5453142A (en) * 1991-06-03 1995-09-26 Klein; Andre Method and apparatus for securing sheets to slats and in spaces therebetween for forming a composite structure
WO2001045613A1 (en) * 1999-12-21 2001-06-28 The Procter & Gamble Company Disposable article comprising an apertured laminate web
EP2075118A1 (en) * 2007-12-27 2009-07-01 Lamiflex AB Packaging material and method for packaging essentially cylindrical objects

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2217773A (en) * 1938-09-22 1940-10-15 Selva Luigi Ruggero Manufacture of covers for books or the like
US3674583A (en) * 1970-10-26 1972-07-04 Int Paper Co Method for the preparation of integrated nettings and laminates
GB1338452A (en) * 1972-05-16 1973-11-21 Flexipane Ltd Reinforced flexible plastics sheeting
GB1522432A (en) * 1976-10-21 1978-08-23 Ruggeri V Method of moulding hollow stiffeners or lightweight laminates or wholly box girdered laminates in fibre reinforced plastics
US5453142A (en) * 1991-06-03 1995-09-26 Klein; Andre Method and apparatus for securing sheets to slats and in spaces therebetween for forming a composite structure
WO2001045613A1 (en) * 1999-12-21 2001-06-28 The Procter & Gamble Company Disposable article comprising an apertured laminate web
EP2075118A1 (en) * 2007-12-27 2009-07-01 Lamiflex AB Packaging material and method for packaging essentially cylindrical objects

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