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
  • 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
  • B32B3/26—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 a particular shape of the outline of the cross-section of a continuous layer; characterised by a layer with cavities or internal voids ; characterised by an apertured layer
  • B32B3/28—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 a particular shape of the outline of the cross-section of a continuous layer; characterised by a layer with cavities or internal voids ; characterised by an apertured layer characterised by a layer comprising a deformed thin sheet, i.e. the layer having its entire thickness deformed out of the plane, e.g. corrugated, crumpled
• • 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
• • 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
  • B32B38/16—Drying; Softening; Cleaning
  • B32B38/164—Drying
• • D—TEXTILES; PAPER
  • D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
  • D04H—MAKING TEXTILE FABRICS, e.g. FROM FIBRES OR FILAMENTARY MATERIAL; FABRICS MADE BY SUCH PROCESSES OR APPARATUS, e.g. FELTS, NON-WOVEN FABRICS; COTTON-WOOL; WADDING ; NON-WOVEN FABRICS FROM STAPLE FIBRES, FILAMENTS OR YARNS, BONDED WITH AT LEAST ONE WEB-LIKE MATERIAL DURING THEIR CONSOLIDATION
  • D04H13/00—Other non-woven fabrics
• • D—TEXTILES; PAPER
  • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
  • D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
  • D21H27/00—Special paper not otherwise provided for, e.g. made by multi-step processes
  • D21H27/30—Multi-ply
  • D21H27/42—Multi-ply comprising dry-laid paper
• • 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
  • B32B2307/20—Properties of the layers or laminate having particular electrical or magnetic properties, e.g. piezoelectric
  • B32B2307/202—Conductive
• • 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
  • B32B2307/20—Properties of the layers or laminate having particular electrical or magnetic properties, e.g. piezoelectric
  • B32B2307/206—Insulating
• • 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
  • B32B2307/758—Odour absorbent
• • 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
• • D—TEXTILES; PAPER
  • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
  • D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
  • D21H27/00—Special paper not otherwise provided for, e.g. made by multi-step processes
  • D21H27/30—Multi-ply
  • D21H27/40—Multi-ply at least one of the sheets being non-planar, e.g. crêped

Definitions

• This invention relates to a corrugated cardboard, which contains at least one smooth
• corrugated cardboard is as material for various packaging containers.
• corrugated cardboard is used as a packaging material, its primary purpose is to
• the intention of the present invention is to provide a corrugated cardboard in which
• This layer formed by dry laying can be either the corrugated layer or equally the smooth
• a layer formed by dry laying can contain
• fibres or particles absorbing liquid or odours The fibres of a layer formed by dry
• laying can also be dyed to give a desired tone of colour to the layer in question.
• layer formed by dry laying can also contain fibres or particles emitting odours.
• a layer formed by dry laying can be made to contain fibres or particles
• a corrugated cardboard according to the invention can further contain at least one
• barrier layer on at least one surface of at least one cardboard layer.
• thermoplastic layer is typically a gas- and/or liquid tight thermoplastic layer attached to the cardboard
• FIG. 1 shows a first example embodiment of a corrugated cardboard according to the
• Fig. 2 shows a second example embodiment of a corrugated cardboard according to
• cardboard according to the invention is shown. It contains a smooth cardboard layer
• corrugated layer 2 This corrugated
• layer 2 is produced by dry laying, i.e., by so-called dry-forming technique. This
• desired layer thickness requires, when one layer after another is formed on the same
• the layer formed by dry laying can be composed of primarily wood fibres which are preferably relatively long-fibre
• thermobonding mechanical pulp and of plastic fibres which can be of any suitable thermobonding
• the web is bonded with heat in, for instance, a flow-
• dry laying must, as a rule, be relatively rigid. This is achieved by appropriately
• agents absorbing odours can be added to the web either in
• properties of a packaging material can be varied according to the requirements of die
• Figure 2 of the attached drawing shows another example embodiment of a
• corrugated cardboard according to the invention.
• layer 20 of cardboard is
• corrugated and the smooth layer 10 attached to it is a layer formed by dry laying.
• the layer formed by dry laying can be given the desired properties
• a corrugated cardboard according to die invention can also be made to contain
• barrier layers are attached to a cardboard
• thermoplastic gas and/or liquid tightness and typically made of thermoplastic can be located on
• the barrier layer can naturally be located between these cardboard layers.
• a corrugated cardboard can contain
• cardboard resembles, for example, conventional so-called two-sided corrugated
• layer when made of cardboard, can be made of one or several webs, in which case a
• barrier layer or several barrier layers, if such exist, can be located on any surface of
• any of the cardboard layers There can also be several layers formed by dry laying so
• corrugated layer is added a corrugated layer. More than one corrugated layers can, if

Landscapes

• Engineering & Computer Science (AREA)
• Textile Engineering (AREA)
• Paper (AREA)
• Laminated Bodies (AREA)
• Machines For Manufacturing Corrugated Board In Mechanical Paper-Making Processes (AREA)

Applications Claiming Priority (2)

Publications (1)

Family

ID=8549777

Family Applications (1)

Country Status (2)

Cited By (2)

Citations (5)

• 1997
  • 1997-10-22 FI FI974025A patent/FI974025A7/fi unknown
• 1998
  • 1998-10-19 WO PCT/FI1998/000809 patent/WO1999020839A1/fi active Application Filing

Patent Citations (5)

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