US20020060006A1 - Paperboard-based Material - Google Patents
Paperboard-based Material Download PDFInfo
- Publication number
- US20020060006A1 US20020060006A1 US09/879,950 US87995001A US2002060006A1 US 20020060006 A1 US20020060006 A1 US 20020060006A1 US 87995001 A US87995001 A US 87995001A US 2002060006 A1 US2002060006 A1 US 2002060006A1
- Authority
- US
- United States
- Prior art keywords
- layer
- dry
- paperboard
- attached
- core layer
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Abandoned
Links
- 239000000463 material Substances 0.000 title claims abstract description 68
- 239000011087 paperboard Substances 0.000 title claims abstract description 23
- 239000010410 layer Substances 0.000 claims abstract description 61
- 239000012792 core layer Substances 0.000 claims abstract description 24
- 239000007788 liquid Substances 0.000 claims abstract description 19
- 238000003475 lamination Methods 0.000 claims description 7
- 239000011230 binding agent Substances 0.000 claims description 6
- 229920001222 biopolymer Polymers 0.000 claims description 5
- 229920003043 Cellulose fiber Polymers 0.000 claims description 4
- 239000006185 dispersion Substances 0.000 claims description 4
- 238000001125 extrusion Methods 0.000 claims description 4
- 229920001059 synthetic polymer Polymers 0.000 claims description 4
- 239000000853 adhesive Substances 0.000 claims description 2
- 230000001070 adhesive effect Effects 0.000 claims description 2
- 239000004816 latex Substances 0.000 claims description 2
- 229920000126 latex Polymers 0.000 claims description 2
- 239000002344 surface layer Substances 0.000 claims description 2
- 235000013305 food Nutrition 0.000 description 5
- 238000010438 heat treatment Methods 0.000 description 4
- 238000000034 method Methods 0.000 description 3
- 239000000203 mixture Substances 0.000 description 3
- 230000005540 biological transmission Effects 0.000 description 2
- 229920001684 low density polyethylene Polymers 0.000 description 2
- 229920003023 plastic Polymers 0.000 description 2
- 239000004033 plastic Substances 0.000 description 2
- 238000004064 recycling Methods 0.000 description 2
- 230000004888 barrier function Effects 0.000 description 1
- 229920000704 biodegradable plastic Polymers 0.000 description 1
- 210000005069 ears Anatomy 0.000 description 1
- 239000000835 fiber Substances 0.000 description 1
- 235000021268 hot food Nutrition 0.000 description 1
- 238000004806 packaging method and process Methods 0.000 description 1
- 239000011090 solid board Substances 0.000 description 1
- 229920002994 synthetic fiber Polymers 0.000 description 1
Images
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
- 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
- B32B27/10—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 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
- B32B29/02—Layered products comprising a layer of paper or cardboard next to a fibrous or filamentary 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
- 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
-
- 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
-
- 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
- B32B2307/70—Other properties
- B32B2307/726—Permeability to liquids, absorption
- B32B2307/7265—Non-permeable
-
- 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
- B32B2439/02—Open containers
Definitions
- the invention relates to a paperboard-based material used particularly for producing cups, bowls, plates and the like, the material comprising a core layer which is liquid-proof at least for a short period of time and consists of at least one paperboard layer and at least one other material layer.
- the material described above is typically used for producing various dishes intended for liquids, such as cups and bowls, the material comprising a paperboard layer and a layer attached thereto which is liquid proof at least for a short period of time.
- Such materials are not as liquid proof as proper liquid packaging boards which can be used for storing liquids even for long periods and which comprise several plastic layers and barrier layers to ensure that they are liquid and gas proof.
- the object of the present invention is to provide a paperboard-based material which is used particularly for producing dishes, such as cups, bowls, plates and the like, and the outer surface of which does not heat up to a dangerous extent even when the dish is filled with hot liquid or food or when these are heated up in a microwave oven.
- the paperboard-based material of the invention which is characterized in that, in addition to the core layer, the material comprises a dry-formed material layer attached to one surface of the core layer.
- this dry-formed material layer contains at least 50% of cellulose fibre and is bound with a binder.
- This dry-formed material layer can be attached to the core layer surface either by extrusion lamination or dispersion lamination.
- the material layer providing short-term liquid impermeability is made of synthetic polymer and/or biopolymer.
- biopolymer also called bioplastic
- the dish will also be well-suited for recycling and may even be a biodegradable, i.e. compostable, product.
- One surface of the paperboard material according to the invention consists of a dry-formed material layer which is porous and contains rather a lot of air. Thus heat transmission does not cause the outer surface of the material to heat up to a dangerous extent even when the dish made of it is filled with hot liquid or food or these are heated in the dish in a microwave oven.
- FIGURE shows a cross-section of a preferred embodiment of the material according to the invention.
- the figure shows a cross-section of a preferred embodiment of the paperboard-based material according to the invention.
- the cross-section comprises a paperboard layer 2 and a material layer attached to one surface thereof, e.g. a layer 3 of synthetic polymer and/or biopolymer which renders the core layer 1 formed by the paperboard layer 2 and layer 3 liquid proof at least for a short period of time.
- the paperboard layer 2 may consist of pure solid board the basis weight of which may be e.g. 210 g/m 2 .
- Layer 3 may consist of LPDE the basis weight of which may be e.g. 10 to 30 g/m 2 .
- the structure of the core layer 1 corresponds to the structure of the conventional paperboard-based material used for producing dishes.
- a dry-formed material layer 4 is attached to one surface of the core layer 1 .
- this dry-formed material layer contains at least 50% of cellulose fibre and is bound with a binder.
- cellulose fibres are spread evenly onto a moving wire on which the material is formed by means of air flow.
- dry-forming it is possible to use very different fibres which are spread onto the wire by means of one or more formers.
- the material of the invention primarily contains cellulose fibres and secondarily artificial fibres, such as plastic fibres or the like, depending on the desired properties of the material.
- the binding agents bind the material layer on the wire so that it forms a uniform web.
- Such a dry-formed material layer is relatively porous, thus containing rather a lot of air.
- the thickness of the dry-formed material layer 4 used may be e.g. 0.3 to 2 mm and the basis weight 30 to 100 g/m 2 .
- This material layer 5 may be e.g. a layer of synthetic polymer and/or biopolymer formed by extrusion lamination. It may be made of LPDE the basis weight of which is e.g. 10 to 30 g/m 2 . Layer 5 may also be a material layer which is spread or sprayed onto the surface of the core layer 1 and by means of which the dry-formed layer 4 is attached to the core layer 1 . This procedure is called dispersion lamination.
- the dry-formed layer 4 can also be attached in a manner which differs from the dispersion and extrusion lamination procedures described above.
- the surface layer of the dry-formed material layer contains, at least on the side to be attached to the core layer 1 , adhesive latex by means of which the core layer and the dry-formed layer can be attached to each other.
- adhesive latex by means of which the core layer and the dry-formed layer can be attached to each other.
- the core layer 1 and the dry-formed layer 4 can be directly attached to each other.
- Other materials could also be used at least on the surface of the dry-formed material layer to be attached to the core layer 1 to attach these layers together.
- the paperboard-based material according to the invention has been described above only by means of some preferred embodiments and it is to be understood that the detailed structure as well as the layer or layers providing liquid impermeability, the paperboard-based layer and the dry-formed layer can be modified without deviating from the scope of protection defined in the appended claims.
- the layers providing liquid impermeability and their material composition may vary according to the desired properties.
- the detailed composition and basis weight of the paperboard layer may also differ.
- the fibre content of the dry-formed layer and the way of binding it may vary as well as the way in which it is attached to the core layer.
- the paperboard-based material of the invention can be provided with a composition which is suitable for recycling, i.e. of pulpable quality.
- the invention can be modified considerably without affecting the implementation of the inventive concept, i.e. the fact that by arranging a relatively porous dry-formed material layer as the outer layer of the material from which a dish is to be formed the surface of the dish can be prevented from heating up when there is hot food or liquid next to the surface opposite to the material.
Landscapes
- Laminated Bodies (AREA)
- Table Devices Or Equipment (AREA)
- Wrappers (AREA)
- Containers Having Bodies Formed In One Piece (AREA)
Abstract
The invention relates to a paperboard-based material used particularly for producing dishes, such as cups, bowls, plates or the like, the material comprising a core layer which is liquid proof at least for a short period of time and is formed of at least one paperboard layer and at least one other material layer. According to the invention, the material also comprises a dry-formed material layer attached to one surface of the core layer.
Description
- The invention relates to a paperboard-based material used particularly for producing cups, bowls, plates and the like, the material comprising a core layer which is liquid-proof at least for a short period of time and consists of at least one paperboard layer and at least one other material layer.
- The material described above is typically used for producing various dishes intended for liquids, such as cups and bowls, the material comprising a paperboard layer and a layer attached thereto which is liquid proof at least for a short period of time. Such materials are not as liquid proof as proper liquid packaging boards which can be used for storing liquids even for long periods and which comprise several plastic layers and barrier layers to ensure that they are liquid and gas proof.
- When dishes are produced from paperboard-based material, special structural solutions are needed to make the dishes suitable for hot liquids, too. For example, a coffee cup needs to be provided with ears which allow to handle the cup containing hot coffee safely. Such special structural solutions cannot, however, be applied to other kinds of dish, such as plates, bowls or the like. Thus the outer surface of a dish containing food or liquid heats up considerably when food or liquid is heated in a microwave oven, for example. In that case microwaves do not heat up the material of the dish itself, but heating results from heat transmission from the food or liquid. The outer surface of such a dish may be so hot after heating in the microwave oven that it cannot be handled safely with bare hands.
- The object of the present invention is to provide a paperboard-based material which is used particularly for producing dishes, such as cups, bowls, plates and the like, and the outer surface of which does not heat up to a dangerous extent even when the dish is filled with hot liquid or food or when these are heated up in a microwave oven. This is achieved with the paperboard-based material of the invention which is characterized in that, in addition to the core layer, the material comprises a dry-formed material layer attached to one surface of the core layer. Preferably this dry-formed material layer contains at least 50% of cellulose fibre and is bound with a binder. This dry-formed material layer can be attached to the core layer surface either by extrusion lamination or dispersion lamination. Usually the material layer providing short-term liquid impermeability is made of synthetic polymer and/or biopolymer. Particularly when biopolymer, also called bioplastic, is used, the dish will also be well-suited for recycling and may even be a biodegradable, i.e. compostable, product.
- One surface of the paperboard material according to the invention consists of a dry-formed material layer which is porous and contains rather a lot of air. Thus heat transmission does not cause the outer surface of the material to heat up to a dangerous extent even when the dish made of it is filled with hot liquid or food or these are heated in the dish in a microwave oven.
- In the following, the paperboard-based material of the invention will be described in greater detail with reference to the accompanying drawing, in which the FIGURE shows a cross-section of a preferred embodiment of the material according to the invention.
- The figure shows a cross-section of a preferred embodiment of the paperboard-based material according to the invention. The cross-section comprises a
paperboard layer 2 and a material layer attached to one surface thereof, e.g. alayer 3 of synthetic polymer and/or biopolymer which renders thecore layer 1 formed by thepaperboard layer 2 andlayer 3 liquid proof at least for a short period of time. Thepaperboard layer 2 may consist of pure solid board the basis weight of which may be e.g. 210 g/m2.Layer 3 may consist of LPDE the basis weight of which may be e.g. 10 to 30 g/m2. In principle, the structure of thecore layer 1 corresponds to the structure of the conventional paperboard-based material used for producing dishes. - According to the invention, a dry-formed
material layer 4 is attached to one surface of thecore layer 1. Most preferably this dry-formed material layer contains at least 50% of cellulose fibre and is bound with a binder. As is well known, in dry-forming fibres are spread evenly onto a moving wire on which the material is formed by means of air flow. In dry-forming it is possible to use very different fibres which are spread onto the wire by means of one or more formers. The material of the invention, however, primarily contains cellulose fibres and secondarily artificial fibres, such as plastic fibres or the like, depending on the desired properties of the material. In dry-forming either binder fibres are scattered into the material or binder is sprayed into the material on the wire, and in the following heat treatment step the binding agents bind the material layer on the wire so that it forms a uniform web. Such a dry-formed material layer is relatively porous, thus containing rather a lot of air. In the paperboard-based material of the invention the thickness of the dry-formedmaterial layer 4 used may be e.g. 0.3 to 2 mm and the basis weight 30 to 100 g/m2. - As appears from the figure, between the
core layer 1 and the dry-formedlayer 4 there is amaterial layer 5 by means of which the dry-formedlayer 4 and thecore layer 1 are attached to each other. Thismaterial layer 5 may be e.g. a layer of synthetic polymer and/or biopolymer formed by extrusion lamination. It may be made of LPDE the basis weight of which is e.g. 10 to 30 g/m2.Layer 5 may also be a material layer which is spread or sprayed onto the surface of thecore layer 1 and by means of which the dry-formedlayer 4 is attached to thecore layer 1. This procedure is called dispersion lamination. - The dry-formed
layer 4 can also be attached in a manner which differs from the dispersion and extrusion lamination procedures described above. In this method the surface layer of the dry-formed material layer contains, at least on the side to be attached to thecore layer 1, adhesive latex by means of which the core layer and the dry-formed layer can be attached to each other. In that case there is no need for aseparate material layer 5, but thecore layer 1 and the dry-formedlayer 4 can be directly attached to each other. Other materials could also be used at least on the surface of the dry-formed material layer to be attached to thecore layer 1 to attach these layers together. - The paperboard-based material according to the invention has been described above only by means of some preferred embodiments and it is to be understood that the detailed structure as well as the layer or layers providing liquid impermeability, the paperboard-based layer and the dry-formed layer can be modified without deviating from the scope of protection defined in the appended claims. Thus there may be one or more layers providing liquid impermeability and their material composition may vary according to the desired properties. The detailed composition and basis weight of the paperboard layer may also differ. Furthermore, the fibre content of the dry-formed layer and the way of binding it may vary as well as the way in which it is attached to the core layer. One significant property of the paperboard-based material of the invention is that, if desired, it can be provided with a composition which is suitable for recycling, i.e. of pulpable quality. Thus the invention can be modified considerably without affecting the implementation of the inventive concept, i.e. the fact that by arranging a relatively porous dry-formed material layer as the outer layer of the material from which a dish is to be formed the surface of the dish can be prevented from heating up when there is hot food or liquid next to the surface opposite to the material.
Claims (6)
1. A paperboard-based material used particularly for producing dishes, such as cups, bowls, plates or the like, the material comprising
a core layer which is liquid proof at least for a short period of time and is formed of at least one paperboard layer and at least one other material layer; and
a dry-formed material layer attached to one surface of the core layer.
2. A material according to claim 1 , wherein said at least one other material layer is a layer of synthetic polymer and/or biopolymer.
3. A material according to claim 1 , wherein the dry-formed material layer is a layer containing at least 50% of cellulose fibre and bound with a binder.
4. Material according to claim 1 , wherein the dry-formed material layer contains, at least in the surface layer to be attached to the core layer, adhesive latex used for attaching the dry-formed material layer and the core layer to each other.
5. A material according to claim 1 , wherein the dry-formed material layer and the core layer are attached to each other by extrusion lamination.
6. A material according to claim 1 , wherein the dry-formed material layer and the core layer are attached to each other by dispersion lamination.
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FI982702 | 1998-12-14 | ||
FI982702A FI106940B (en) | 1998-12-14 | 1998-12-14 | Cardboard-based material |
PCT/FI1999/001032 WO2000035674A1 (en) | 1998-12-14 | 1999-12-14 | Paperboard-based material |
Related Parent Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/FI1999/001032 Continuation WO2000035674A1 (en) | 1998-12-14 | 1999-12-14 | Paperboard-based material |
Publications (1)
Publication Number | Publication Date |
---|---|
US20020060006A1 true US20020060006A1 (en) | 2002-05-23 |
Family
ID=8553108
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US09/879,950 Abandoned US20020060006A1 (en) | 1998-12-14 | 2001-06-14 | Paperboard-based Material |
Country Status (7)
Country | Link |
---|---|
US (1) | US20020060006A1 (en) |
EP (1) | EP1150838A1 (en) |
JP (1) | JP2002532286A (en) |
AU (1) | AU1782100A (en) |
CA (1) | CA2355126A1 (en) |
FI (1) | FI106940B (en) |
WO (1) | WO2000035674A1 (en) |
Family Cites Families (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB1430760A (en) * | 1972-09-09 | 1976-04-07 | Kroyer St Annes Ltd Karl | Multi-ply fibrous sheets |
DE2945977C2 (en) * | 1979-11-12 | 1984-01-26 | Lignotock Verfahrenstechnik Gmbh, 1000 Berlin | Manufacture of molded parts from layered fiber mats and fiber fleece |
US4713510A (en) * | 1986-06-25 | 1987-12-15 | International Paper Co. | Package for microwave cooking with controlled thermal effects |
SE504226C2 (en) * | 1995-04-24 | 1996-12-09 | Tetra Laval Holdings & Finance | Packaging laminate and packaging made therefrom |
CH688856A5 (en) * | 1996-03-11 | 1998-04-30 | Sa Patent Ag | Recycleable and biodegradable, heat and tiefkuehlbestaendiges laminate, especially for the preservation of food |
FI974025A (en) * | 1997-10-22 | 1999-04-23 | Walkisoft Finland Oy | corrugated |
-
1998
- 1998-12-14 FI FI982702A patent/FI106940B/en not_active IP Right Cessation
-
1999
- 1999-12-14 AU AU17821/00A patent/AU1782100A/en not_active Abandoned
- 1999-12-14 JP JP2000587963A patent/JP2002532286A/en active Pending
- 1999-12-14 CA CA002355126A patent/CA2355126A1/en not_active Abandoned
- 1999-12-14 WO PCT/FI1999/001032 patent/WO2000035674A1/en not_active Application Discontinuation
- 1999-12-14 EP EP99961083A patent/EP1150838A1/en not_active Withdrawn
-
2001
- 2001-06-14 US US09/879,950 patent/US20020060006A1/en not_active Abandoned
Also Published As
Publication number | Publication date |
---|---|
AU1782100A (en) | 2000-07-03 |
FI982702A (en) | 2000-06-15 |
EP1150838A1 (en) | 2001-11-07 |
JP2002532286A (en) | 2002-10-02 |
FI106940B (en) | 2001-05-15 |
CA2355126A1 (en) | 2000-06-22 |
FI982702A0 (en) | 1998-12-14 |
WO2000035674A1 (en) | 2000-06-22 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
AS | Assignment |
Owner name: STORA ENSO OYJ, FINLAND Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNORS:NIEMI, TAPIO;PENTTINEN, TAPANI;NEVALAINEN, KIMMO;AND OTHERS;REEL/FRAME:012298/0716;SIGNING DATES FROM 20010815 TO 20010913 |
|
STCB | Information on status: application discontinuation |
Free format text: ABANDONED -- FAILURE TO RESPOND TO AN OFFICE ACTION |