WO2010111735A1 - Matériau souple - Google Patents

Matériau souple Download PDF

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Publication number
WO2010111735A1
WO2010111735A1 PCT/AU2010/000364 AU2010000364W WO2010111735A1 WO 2010111735 A1 WO2010111735 A1 WO 2010111735A1 AU 2010000364 W AU2010000364 W AU 2010000364W WO 2010111735 A1 WO2010111735 A1 WO 2010111735A1
Authority
WO
WIPO (PCT)
Prior art keywords
layer
corrugated
flat
indentations
face
Prior art date
Application number
PCT/AU2010/000364
Other languages
English (en)
Inventor
Robert Douglas Ferris
Skipwith Brian Lowis Tayler
Original Assignee
Earthwrap Pty Ltd
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 Earthwrap Pty Ltd filed Critical Earthwrap Pty Ltd
Priority to AU2010230842A priority Critical patent/AU2010230842A1/en
Publication of WO2010111735A1 publication Critical patent/WO2010111735A1/fr

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B31—MAKING ARTICLES OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER; WORKING PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31F—MECHANICAL WORKING OR DEFORMATION OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31F1/00—Mechanical deformation without removing material, e.g. in combination with laminating
    • B31F1/20—Corrugating; Corrugating combined with laminating to other 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
    • B32B29/00—Layered products comprising a layer of paper or cardboard
    • B32B29/08—Corrugated paper or cardboard
    • 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
    • B32B38/00—Ancillary operations in connection with laminating processes
    • B32B38/0012—Mechanical treatment, e.g. roughening, deforming, stretching
    • B32B2038/0024—Crushing
    • 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
    • B32B38/00—Ancillary operations in connection with laminating processes
    • B32B38/04—Punching, slitting or perforating
    • B32B2038/045—Slitting
    • 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
    • B32B2317/00—Animal or vegetable based
    • B32B2317/12—Paper, e.g. cardboard
    • B32B2317/127—Corrugated cardboard
    • 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
    • B32B2439/00—Containers; Receptacles
    • 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 described embodiments relate to a flexible material for use in protective packaging.
  • Corrugated cardboard laminates are commonly used to form boxes. Such laminates are designed to be rigid rather than flexible and do not lend themselves to use in many applications as a result.
  • Packaging materials made of alternative materials such as plastic have been proposed but can be expensive and detrimental to the environment, either because they do not readily biodegrade or because the products or processes used for their manufacture.
  • Some embodiments relate to a material, comprising: a flat paper layer; and a corrugated paper layer bonded to one face of the flat paper layer; wherein the corrugated paper layer comprises indentations formed across an opposite face of the corrugated layer.
  • the indentations may be arranged at an angle to the corrugations and may effectively define discontinuous score or crease lines crossing the corrugations.
  • the indentations may also be substantially parallel.
  • the indentations may comprise a first series of indentations arranged at a first angle to a longitudinal direction of corrugations and a second series of indentations at a second angle to the longitudinal direction of the corrugations.
  • the magnitude of each of the first and second angles may be within a range between 0 and 90 degrees, such as between 20 and 70 degrees or between 30 and 60 degrees, for example.
  • the magnitude of the first and the second angles may be substantially the same, but the first and second angles may be reckoned from a different reference.
  • an acute angle of 30 degrees to the longitudinal orientation of the corrugations could also be considered to be an obtuse angle of 150 degrees if reckoned from a different starting point, even though each angle effectively has the same magnitude.
  • the magnitude of the angles may be about 45 degrees.
  • a further series of indentations may be provided at an angle of 90 degrees to the corrugations.
  • the indentations (or the spacings of score or crease lines) of any one series may be between about 10 mm and 15 mm apart, or even up to about 50 mm apart, for example.
  • a second flat paper layer may be bonded to a face of the corrugated layer opposite from the first flat paper layer.
  • the thickness of the first or second paper layer may be between 0.05 mm and 0.3 mm. hi some embodiments, the thickness of one or both paper layers may be approximately 0.1 mm.
  • the weight of each paper layer may be between 50 and 250 grams per square meter.
  • the material may further comprise an outer layer bonded to a face of the flat paper layer.
  • the outer layer may be a protective layer comprising grease-proof or water-resistant material or may comprise an insulation of natural or cellulosic fiber material that is biodegradable.
  • the material may be formed into a three dimensional container.
  • the three dimensional container may be an envelope, a carry bag, bottle bag or a rectanguloid container, for example.
  • the material may consist of biodegradable and/or recyclable constituent materials.
  • the step of forming indentations on the corrugated material may be performed by pressing a roller having blade portions against the surface of the corrugated material, for example.
  • the roller may be alternatively or additionally applied to the exposed face of the flat layer.
  • the method may further comprise the step of bonding a second flat paper layer to a surface of the corrugated layer opposite from the first flat paper layer.
  • the method may further comprise the step of bonding at least one outer layer over one of the flat paper layers.
  • the step of bonding a corrugated paper layer to one face of a flat paper layer may include applying an adhesive to the corrugated surface using either a spray or roller, for example.
  • a flexible packaging material comprising: a substantially flat first layer; and a corrugated second layer bonded on one side to the first layer, the second layer having ridges and valleys arranged in parallel, wherein ridges on an opposite side of the second layer are each formed to have a series of structural weakenings along a length of each ridge.
  • the structural weakenings may be formed by scoring, cutting or indenting the ridges.
  • the first and second layers may be paper layers.
  • Other embodiments relate to a method of forming a flexible material, the method comprising: bonding a substantially flat first layer to one face of a corrugated second layer, the second layer having ridges and valleys arranged in parallel; and forming a series of structural weakenings along a length of each ridge on an opposite face of the second layer.
  • a laminate comprising: a flat layer; and a corrugated layer bonded to one face of the flat layer; wherein the corrugated layer comprises indentations formed across an opposite face of the corrugated layer.
  • a flexible material comprising: a flat layer; and a corrugated layer bonded to one face of the flat layer and co-extensive therewith, the corrugated layer defining parallel ridges and valleys having a longitudinal orientation; wherein parallel lines of structural weakening extend at an angle to the longitudinal orientation across an exposed face of at least one of the flat layer and the corrugated layer.
  • the parallel lines of the flexible material may comprise first and second series of differently angled lines.
  • the first and second series may be oppositely angled at between about 30 degrees and 60 degrees to the longitudinal direction, for example.
  • the parallel lines may be spaced apart by between about 10 mm and about 15 mm, for example.
  • the flat and corrugated layers are continuous sheets of thin material, such as paper.
  • each flat paper layer may be between about 0.05 mm and about 0.3 mm.
  • the weight of each flat paper layer may be between about 50 and about 250 grams per square meter.
  • the material described herein may be used as an insulating, packaging or packing material. Further embodiments relate to apparatus comprising means for forming the material and for performing the method as described herein.
  • Figure 1 is a perspective view of a flexible material
  • Figure 2 is a side view of the flexible material of Figure 1;
  • Figure 3 is a plan view of an alternative flexible material
  • Figure 4 is a side view of an alternative flexible material
  • Figure 5 is a perspective view of 1 flexible material formed into a packaging container
  • Figure 6 is a perspective view of 1 flexible material formed into an alternative packaging container
  • Figure 7 is a flow chart of a manufacturing process according to some embodiments.
  • Figure 8 is a schematic representation of a manufacturing apparatus for manufacturing a flexible material according to some embodiments.
  • Figure 9 is a flow chart of the manufacturing process according to the apparatus of Figure 7.
  • Figure 10 is a perspective view of a face of a flexible material according to some embodiments.
  • the described embodiments relate to a flexible material, a method of manufacturing a flexible material and packages formed by a flexible material.
  • a flexible material 110 having a flat paper layer 114 and a corrugated paper layer 112.
  • Corrugated paper layer 112 is formed to have ridges and valleys extending in a longitudinal orientation. Valleys of corrugated paper layer 112 are bonded to one face of flat paper layer 114.
  • the flat paper layer 114 and the corrugated paper layer 112 are co-extensive, in that one does not extend beyond the edge of the other.
  • Both layers 112, 114 are continuous materials (i.e. without openings formed therein).
  • Corrugations of the corrugated layer 112 are formed to have weakened portions arranged to weaken the longitudinal rigidity that the corrugations would otherwise provide to material 110. The weakened portions serve to reduce the resistance of the flexible material 110 to bonding in directions transverse to a plane of the material, while not appreciably altering its tensile strength in the planar directions.
  • weakened portions are exemplified by indentations 118 which are formed on ridges of corrugations formed on the face of corrugated paper layer 112 that is opposite to the paper layer 114.
  • the weakened portions may be formed by scoring, crushing or slitting, for example.
  • Indentations 118 are described for convenience as only one form of structural weakening of the ridges.
  • indentations 118 may be substituted for slits or other forms of structural weakening.
  • Flat paper layer 114 and corrugated paper layer 112 may be made from commercially available paper products, but preferably from recycled cellulosic materials.
  • Flexible material 110 can be used as a packing or packaging material, for example.
  • flexible material 110 can be recycled more easily than plastic alternatives and degrade in land-fills at a much faster rate.
  • Indentations 118 may be continuous across the face of the corrugated layer, or only applied to the raised (ridge) portions of the corrugations. Indentations 118 should be sufficiently deep to weaken the longitudinal resistance to flexion of the ridge portions of each corrugation, thereby weakening the rigidity of the flexible material 110 and its resistance to folding and providing the flexible material 110 with increased flexibility in a direction across (transverse to) the corrugations. However, despite the periodic weakenings along the length of each corrugation, portions of the ridge of each corrugation positioned between indentations 118, which may generally resemble a longitudinal series of mounds, retain much of their structural integrity.
  • the flexible material 110 can be readily bent, curved or folded without it significantly losing its tensile and shear strength.
  • the flexible material 110 is therefore particularly suitable for wrapping furniture, art work and numerous other items that require protective packaging.
  • flexible material 110 may be provided in large rolls or sheets for manual application to other items as protective insulation, packaging or wrapping.
  • Indentations 118 are arranged such that they comprise a series of parallel indentations in the ridges, arranged at a first angle to the corrugations, hi the example shown in Figure 1, the angle is about 45 degrees from the line of the corrugations.
  • One series of indentations 118a may be provided (as shown in Figure 1) or, alternatively, a second series of indentations 118b ( Figure 3) may also be provided at a second angle to the corrugations.
  • Each series of indentations may extend across an entire face of corrugated paper layer 112 (or across flat paper layer 114 in some embodiments - see Figure 10) or, as shown in Figure 3, only across a portion of the face.
  • a second series of indentations 118b are shown by way of example at an angle of approximately 45 degrees, however at a different orientation to the first series of indentations 118a.
  • the first and second angles may have the same magnitude (45 degrees) but different orientations. It may also be desirable to have indentations 118a, 118b run at angles other than 45 degrees (i.e. greater than 0 and less than 180 degrees) and the magnitude of the first and second angles may also be different to each other.
  • the first and second angles may be varied, depending on the desired structural weakening pattern to be applied to flexible material 110.
  • first series of indentations 118a may be orientated at 35 degrees to the corrugations and the second series of indentations 118b may be orientated at -50 (or 130) degrees to the corrugations.
  • angles of between about 20 and about 70 degrees, or possibly between about 30 degrees and about 60 degrees, would be suitable to achieve the desired effect of structurally weakening the corrugations.
  • the described magnitudes of the angles are provided by way of example only and are intended to indicate an acute angular orientation to the closest longitudinal reference line, rather than an absolute angle from a fixed Cartesian reference (0 degrees) origin. Lesser or greater angles may be employed for the first and second angles to suit a specific configuration.
  • a further series of indentations 118c may be formed at an angle of about 90 degrees, i.e. perpendicular, to the corrugations.
  • the number of series of indentations may be altered to provide the desired bending characteristics of the flexible material.
  • Each series of indentations 118 are spaced apart along the corrugations.
  • the amount of spacing can also be altered to provide the desired bending characteristics of flexible material 110.
  • a spacing between indentations (where the score or crease lines cross each ridge of the corrugations) of less than about 15 mm has been found to provide suitable bending characteristics, hi particular, a spacing of about 10 mm is considered to be particularly suitable for use in packaging domestic articles. Spacings of around 7, 8, 9, 11, 12, 13 or 14 mm may be employed in some embodiments. However a spacing below a certain amount may be less effective because if the indentations are too close together, it may limit the retention of the longitudinal series of mounds between the indentations and reduce the protective characteristics of flexible material 110.
  • a spacing above about 15mm may be useful for industrial applications or packaging of heavy items.
  • such spacings may be measured as the shortest distance between two adjacent parallel score or crease lines 118a or 118b.
  • the material thickness of each of flat paper layer 114 and corrugated paper layer 112 may be generally between about 0.05mm and about 0.3mm, for example. In some embodiments, the thickness may be about 0.1mm.
  • the weight of these layers may be between about 50 and about 250 grams per square meter, for example.
  • Flat paper layer 114 may be made from the same grade of paper as corrugated paper layer 112 or from a different grade of paper. Increased material thicknesses and heavier paper weights, for example a material thickness of about 0.445mm and a paper weight of about 385 grams per square meter, may also be employed, where useful for industrial applications or packaging of heavy items. If thicker materials are required, laminates of multiple paper layers or flexible card stock may also be used.
  • the overall thickness of flexible material 110 may be varied depending on the desired application.
  • the thickness of flexible material 110 may be between about 1.5 mm to about 4.0 mm. Thicknesses of about 3.0 mm may be suitable for many applications. Most of the thickness of flexible material 110 is provided by the height of the ridges relative to the valleys of corrugated paper layer 112. In some industrial applications, material 110 may be formed to have greater overall thickness, up to about 25mm, for example. If flexible material 110 is required in a different thickness, the corrugations on corrugated paper layer 112 may be formed deeper or shallower and the paper thickness of corrugated layer 112 may be thicker, for example up to about 0.5 to 1.0 mm. Alternatively or in addition, material having a different thickness, for example up to about 0.5 to 1.0 mm, may be used for flat paper layer 114.
  • Flexible material 110 may also be used as one layer of a multi-layered material by stacking and/or bonding layers of flexible material 110 together.
  • a material comprising two or three layers of flexible material 110 may be formed, with the flat paper layer 114 of each layer of flexible material 110 being bonded to the corrugated layer 112 of an adjacent layer of flexible material 110.
  • the corrugations of each layer of flexible material 110 may be orientated at the same or a different angle from other layers.
  • an alternative flexible material 210 is illustrated.
  • a further flat paper layer 216 which is sufficiently light and flexible as to not overly stiffen flexible material 210, is bonded to a face of corrugated paper layer 212 opposite from flat paper layer 214, i.e. over indentations 218.
  • Indentations 218 may be formed in the same manner as indentations 118.
  • each paper layer 214, 216 and corrugated paper layer 212 may be generally between about 0.05 mm and about 0.3 mm. In some embodiments, the thickness is about 0.1 mm. The weight of these layers may be between about 50 and about 250 grams per square meter.
  • Paper layer 216 may be made from the same grade of paper as paper layer 214 and corrugated paper layer 212 or from a different grade of paper. Increased material thicknesses and heavier paper weights, for example a material thickness of about 0.445 mm and a paper weight of about 385 grams per square meter, may also be employed, where useful for industrial applications or packaging of heavy items. If thicker materials are required, laminates of multiple paper layers or flexible card stock may also be used.
  • the overall thickness of flexible material 210 may be varied depending on the desired application.
  • the thickness of flexible material 210 may be between about 1.5 mm to about 4.0 mm. Thicknesses of about 3.0 mm may also be suitable. Most of the thickness of flexible material is provided by the height of the ridges relative to the valleys of corrugated paper layer 212. In some industrial applications, material 210 may be formed to have greater overall thickness, up to about 25 mm, for example. If flexible material 210 is required in a different thickness, the corrugations on corrugated paper layer 212 may be formed deeper or shallower. Alternatively, material having a different thickness may be used for either of flat paper layers 214, 216.
  • Flexible material 210 may also be used as one layer of a multi-layered material by stacking and/or bonding layers of flexible material 210 together.
  • a material comprising two or three layers or flexible material 210 may be formed, with the flat paper layer 214 of each layer of flexible material 210 being bonded to the corrugated layer 212 (or flat paper layer 216) of an adjacent layer of flexible material 210.
  • the corrugations of each layer of flexible material 210 may be orientated at the same or a different angle from other layers.
  • One or more layers of flexible material 110 may also be combined with one or more layers of flexible material 210 to form a multi-layered material.
  • Paper outer layer 220 may also be provided. Paper outer layer 220 may comprise additional sub-layers (not shown) if additional thickness is desirable, however paper outer layer 220 must be sufficiently light so as to not overly stiffen or rigidify flexible material 210. Paper outer layer 220 may be provided on one side of the flexible material, as shown in Figure 4, bonded to paper layer 216, or both sides, i.e. bonded to paper layers 214, 216 if required.
  • An outer layer 220 may provide additional properties to flexible material 210 to make it suitable for a particular purpose.
  • paper outer layer 220 may comprise a grease-proof or water resistant material, coating or substance.
  • absorption of moisture or contaminants can be reduced by application of such coatings or substances, thereby increasing the useful life of the material.
  • Other materials, such as cotton, wool or biodegradable plastic may also be suitable for use as outer layer 220, depending on the required application.
  • Outer layer 220 may comprise a single layer of these materials or multiple layers of such materials combined.
  • outer layer 220 may comprise two or three layers and may be made up of cotton, wool, shredded or pulped paper or biodegradable plastic.
  • FIG. 5 illustrates a flexible material 310 that can be formed into a shape desirable for containing articles.
  • flexible material 310 is formed into the shape of an envelope.
  • flexible material 310 may be formed into the shape of a carry bag, a bottle bag or a rectanguloid container.
  • An example of a flexible rectanguloid container 320 is shown in Figure 6.
  • flexible material 310 is suitable for use in transporting hot or cold goods because it has improved thermal insulation properties relative to, say, plastic or synthetic bags.
  • a foil layer may be omitted from the bag or container.
  • a suitable adhesive may be used for bonding the layers together, for example poly vinyl acetate (PVA) glue.
  • PVA poly vinyl acetate
  • a starch-based glue or cold-water glue can be used.
  • the adhesive is non-toxic, biodegradable and compatible with existing recycling processes.
  • Step 410 includes the step of bonding flat paper layer 114 to the face of corrugated paper layer 112.
  • Step 412 comprises the step of forming indentations on the face of the corrugated layer 112 opposite to the face that is bonded to the flat paper layer 114.
  • the flat paper layer 114 may be scored, creased or crushed instead of, or in addition to, the scoring, creasing or crushing of the corrugated layer 112 to provide further overall reduced resistance 10 to bonding, folding or curving of the material.
  • the step of bonding a corrugated paper layer to one face of a flat paper layer may include applying an adhesive to the corrugated surface using either a spray or roller application method.
  • Application by a roller method allows only a ridge of each corrugation to be covered with adhesive, reducing the amount of adhesive used.
  • additional strength may be imparted to the corrugated layer 112, 212 by the adhesive (when set). Accordingly, where greater overall stiffness is called for, it may be desirable to coat most or all of one face of the corrugated layer with adhesive using a spray process, for example, to provide additional stiffness to the corrugations.
  • Step 412 may be performed while the adhesive is still moist. Doing this may assist with the forming of the indentations and may increase the strength of the mound formed between the indentations 118.
  • a schematic representation of a manufacturing apparatus 500 is shown in Figure 8.
  • a continuous roll of corrugated material 510 is shown exiting bonding machine 512 which bonds a flat paper layer 114 to a corrugated paper layer 112.
  • Bonding machine 512 may be a suitable commercially available machine for producing a flat paper layer bonded to a corrugated paper layer. Bonding machine 512 (or another in-line machine) may also form a corrugated layer from a flat paper layer or may simply bond an already prepared corrugated layer.
  • single face corrugated material i.e. already bonded in another process
  • Corrugated material 510 may be processed with the corrugations extending across the face of corrugated material 510 (i.e. in the cross- direction) or along the face of corrugated material 510 (i.e. in the machine direction).
  • rollers 514, 516 may comprise a series of ridges, blades or flanges which impart pressure on material 510 to form the indentations, creases or scores. Rollers 514 may form multiple series of indentations, or alternatively, each series of indentations, creases or scores may be formed by a separate roller. Accordingly, a further roller 516 positioned after roller 514 may form additional indentations if required.
  • the flexible material may comprise a further flat paper layer bonded to a face of the corrugated layer opposite from the flat paper layer, i.e. over the indentations.
  • roller 520 supports a roll of flat paper 522 that can be bonded to a face of the flexible material 110 (or 1000, Figure 10) which has already had indentations formed on it.
  • Roller 518 allows the further flat paper layer 522 to be pressed against flexible material 110 to form material 210.
  • Flat paper layer 522 may be bonded to flexible material 110 with a suitable commonly available adhesive, but preferably the adhesive is non-toxic, biodegradable and compatible with existing recycling processes.
  • the creased (and optionally double-sided) flexible material 110, 210 may be wound into a roll 524 ready to be shipped out to a customer.
  • flexible material 110, 210 may be cut into lengths (if not already cut) and supplied as a stacked arrangement of sheets.
  • indentations may be formed on a face of the corrugated layer in multiple steps 612, 614.
  • a further flat paper layer may be bonded to an opposite face of the corrugated paper layer.
  • an outer layer may be bonded over the indentations or over a flat paper layer in step 618.
  • a flexible material 1000 may be formed, as illustrated in Figure 10, having indentations, scores or creases formed on the flat layer 114 rather than, or in addition to, scores, creases or indentations being formed on the corrugated layer 112.
  • processes similar to those described above may be employed to form such creases, scores or indentations across the exposed face of flat paper layer 114 (i.e. that face which is not bonded to corrugated layer 112). It is contemplated that such formation of indentations, scores or creases may involve exerting pressure along at least one series of parallel lines 1018a orientated at an angle to the longitudinal orientation of the corrugations.
  • a second series of differently angled parallel lines 1018b may be formed to cross the first series 1018a.
  • the exertion of pressure to form the one or more series of lines 1018a, 1018b on the exposed face of flat paper layer 114 may also result in a partial crushing of the valleys of the corrugated layer 112 where they are bonded to the flat paper layer 114, thus achieving a dual effect of weakening the resistance of the flat paper layer 114 to bending, curving or folding, while simultaneously reducing the resistance of the corrugated layer 112 to the same manipulations.
  • Such weakenings are, however, exerted in a manner to not pierce through the flat paper layer 114, as this may overly weaken the material and make it overly susceptible to ripping or tearing.
  • the series of parallel lines 1018a, 1018b are shown in Figure 10 as being approximately right-angled to each other and at about 45 degrees to the longitudinal direction of the corrugations (on the opposite side of flat paper layer 114).
  • embodiments may employ variations of such angles, within a range of, say, 20 to 70 degrees or 30 to 60 degrees, and without the magnitudes of the first and second angles being equal, to similar beneficial effect.
  • the minimum separation of adjacent parallel lines 1018a or 1018b may be around 10 to 15 mm or up to around 50 mm, as described above in relation to Figure 3. Alternatively, as in the embodiments described above, this spacing may apply to the distance along each corrugation between where adjacent parallel lines 1018a or 1018b cross that corrugation.
  • Flexible material 1000 shown in Figure 10 may thus be considered to be a modified version of flexible material 110 and may be used to form flexible material 210, and the details of those embodiments described above are also applicable to flexible material 1000, including the manufacturing processes described above for manufacturing flexible material 110 or 210.
  • apparatus 500 may be used in the manner described above (for example, where the indentations, creases or scores are formed only on the exposed face of flat paper layer 114 and not the corrugated layer 112) or readily modified to allow indentations, scores or creases to be formed on both exposed faces (i.e. flat and corrugated) of the material.
  • the angled lines of such indentations, creases or scores may coincide or be offset from each other.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Laminated Bodies (AREA)
  • Wrappers (AREA)

Abstract

L'invention concerne un matériau souple comprenant une couche de papier plat et une couche de papier ondulé collée à une face de la couche de papier plat, la couche de papier ondulé présentant des entailles formées dans une face opposée de la couche ondulée.
PCT/AU2010/000364 2009-03-31 2010-03-30 Matériau souple WO2010111735A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AU2010230842A AU2010230842A1 (en) 2009-03-31 2010-03-30 Flexible material

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US16496509P 2009-03-31 2009-03-31
US61/164,965 2009-03-31

Publications (1)

Publication Number Publication Date
WO2010111735A1 true WO2010111735A1 (fr) 2010-10-07

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PCT/AU2010/000364 WO2010111735A1 (fr) 2009-03-31 2010-03-30 Matériau souple

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH706755A1 (de) * 2012-07-20 2014-01-31 Carton Ideen Gmbh Verpackungseinlage.
GB2623859A (en) * 2022-07-13 2024-05-01 Julian Peter Odell Anderson Marcus A corrugated board mailer, apparatus and product thereof

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Publication number Priority date Publication date Assignee Title
US4931346A (en) * 1988-12-19 1990-06-05 Book Covers Inc. Lightweight laminated paperboard
CA1297767C (fr) * 1987-10-19 1992-03-24 D. Juan Nogueras Dardina Cartonnage stratifie leger
KR100866390B1 (ko) * 2007-07-18 2008-11-03 황지순 보강 골판지 및 이의 제조 장치

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
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US4931346A (en) * 1988-12-19 1990-06-05 Book Covers Inc. Lightweight laminated paperboard
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CH706755A1 (de) * 2012-07-20 2014-01-31 Carton Ideen Gmbh Verpackungseinlage.
GB2623859A (en) * 2022-07-13 2024-05-01 Julian Peter Odell Anderson Marcus A corrugated board mailer, apparatus and product thereof

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