WO1996031347A1 - Compostible laminate - Google Patents
Compostible laminate Download PDFInfo
- Publication number
- WO1996031347A1 WO1996031347A1 PCT/GB1996/000819 GB9600819W WO9631347A1 WO 1996031347 A1 WO1996031347 A1 WO 1996031347A1 GB 9600819 W GB9600819 W GB 9600819W WO 9631347 A1 WO9631347 A1 WO 9631347A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- laminate
- acid
- layer
- compostible
- layers
- Prior art date
Links
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
-
- 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
- B32B27/28—Layered products comprising a layer of synthetic resin comprising synthetic resins not wholly covered by any one of the sub-groups B32B27/30 - B32B27/42
-
- 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
- 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
- B32B7/06—Interconnection of layers permitting easy separation
-
- 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
- D21H19/00—Coated paper; Coating material
- D21H19/80—Paper comprising more than one coating
- D21H19/82—Paper comprising more than one coating superposed
-
- 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
-
- 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
- B32B2323/00—Polyalkenes
- B32B2323/04—Polyethylene
-
- 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
- B32B2323/00—Polyalkenes
- B32B2323/10—Polypropylene
-
- 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
-
- 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
- D21H19/00—Coated paper; Coating material
- D21H19/10—Coatings without pigments
- D21H19/14—Coatings without pigments applied in a form other than the aqueous solution defined in group D21H19/12
- D21H19/24—Coatings without pigments applied in a form other than the aqueous solution defined in group D21H19/12 comprising macromolecular compounds obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds
- D21H19/30—Polyamides; Polyimides
-
- 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
- D21H19/00—Coated paper; Coating material
- D21H19/10—Coatings without pigments
- D21H19/14—Coatings without pigments applied in a form other than the aqueous solution defined in group D21H19/12
- D21H19/34—Coatings without pigments applied in a form other than the aqueous solution defined in group D21H19/12 comprising cellulose or derivatives thereof
Definitions
- THIS INVENTION relates to compostible laminates. Used packaging materials constitute a refuse disposal problem and it is desirable to be able to compost them. Also, in composting organic wastes, for example food or vegetation, it is convenient to transport the compostible material in a compostible container. Bags made of paper or other cellulosic material, for example cellulose film or boxes made of such materials, for example cardboard or the like may be used but are mechanically weak when wet.
- This invention provides compostible laminates comprising cellulosic sheets, for example paper or board, of satisfactory strength which comprise substantially only compostible components and which comprise layers of a cellulose sheet, a polycaprolactone, a polylactic acid and/or a cellulose ester and a poly 3- or 4-hydroxy- alkanoic acid.
- the invention preferably comprises a compostible laminate which comprises a cellulosic sheet directly coated on at least one surface with a layer of polycaprolactone, polylactic acid and/or a cellulose ester and a layer overlying the said directly coated layer of a poly 3 or 4-hydroxyalkanoic acid.
- laminates according to the invention have acceptable wet strength and resistance to cracking. Resistance to cracking is important if the paper or board is folded as any cracking along the fold will allow access to moisture and impairment of the wet strength along the fold.
- the invention also comprises a compostible laminate as aforesaid in which the polyhydroxyalkanoic acid layer is covered with a readily removable sacrificial layer of optionally non-compostible polymer, for example polythene or polypropylene.
- a readily removable sacrificial layer of optionally non-compostible polymer, for example polythene or polypropylene.
- the sacrificial layer is useful in improving the manufacture of the laminate, for example in preventing the sticking of the laminate to chill rolls in the course of manufacture. If desired it may be left in position to protect the laminate until it is to be used.
- the added layers may be applied to the cellulosic sheet simultaneously using known techniques, for example by the use of a multi manifold co-extruder.
- Temperatures of 150 to 300°C and preferably 150 to 250°C are suitably used for co-extrusion and polymers with melting points below the extrusion temperature should be used.
- the laminate is suitably cooled for example to a temperature of 40 to 70 C C. This may be accomplished by contacting the laminate with a chill roller.
- the total weight of the coating layers after stripping the sacrificial layer from the product should be about 5 to 40 grammes per square metre and is preferably 10-25 grammes per square metre.
- the ratio of the polyhydroxyalkanoic acid to the polycapro- lactone, cellulose ester or polylactic acid layer may be 1:10 to 10:1 preferably 5:1 to 1:5 and more preferably 2:1 to 1:2 by weight
- the polyhydroxyalkanoic acid may be a homo or co- polymer suitably of hydroxybutyric acid preferably together with hydroxyvaleric acid. Suitable polymers of this type are described in our European Patents EP 52459 and EP 69497.
- the polyhydroxyalkanoic acid preferably has a molecular weight of 50,000 to 1 million and more preferably 100,000 to 800,000.
- the polylactic acid, cellulose ester or polycaprolactone preferably has a molecular weight of at least 40,000 for example 30,000 to 500,000.
- the sacrificial layer may after it is stripped from the laminate be reused in the manufacturing process if it is a thermo-plastic.
- a pilot line was used for the following work which comprises a roll of 110g/m 2 brown Kraft paper feeding the paper to a unit for corona discharge onto the paper, a support roller supporting the paper emerging from the corona discharge chamber, a die for extruding three layers of polymer onto the paper beyond the support roller, a chill roller and a nip roller for pressing the laminate of paper and polymer together against the chill roller and a wind-up roller for collecting the laminate.
- the corona discharge was at a power of approximately
- the die was fed by three extruders supplying polycaprolactone (a commercial product sold as "Tone” 767 by Union Carbide, estimated number average molecular weight 43,000 melt flow index of 30 at 190°C) , a copolymer comprising 92% hydroxybutyric acid units and 8% hydroxyvaleric acid units in a D-configuration of estimated weight average molecular weight 480,000 sold under the trade name "BIOPOL” by ZENECA Limited and low density polyethylene sold by Borealis as grade NCPE 1515, MFI 15 at 190°C.
- the die was a Cloeren vane flat die of width 350 mm with adjustable vanes and equipped with breaker plates and screen packs and using a CCABB configuration plug.
- the chill roller was maintained at a temperature of 60°C.
- the screw speeds in the preceding table are proportional to the approximate relative thickness of the layers.
- Laminate from the wind-up roller was removed and any polyethylene layer stripped off.
- the coat weight i.e. the total polymer remaining per square metre of laminate
- Adhesion of the layers was tested by manual stripping of the deposited polymer layers from the paper. Cracking of the polymer layer was tested by folding the laminate over so that the polymer layer contacted the polymer layer, the direction of folding being transverse to the line processing direction or parallel to the line processing direction as the case may be, and also so that the paper layer contacted the paper layer in the transverse and parallel directions as aforesaid.
- #20 and #10 are all 3 layer co extrusions with equal "BIOPOL" Polymer to PCL layers
- #9 is a 3 layer co extrusion with a 9/4 ratio of "BIOPOL" Polymer to PCL
- PCL polycaprolactone
- Adhesion 1 Layers come apart easily and both materials remain completely intact.
- Adhesion 2 Some force needed to separate the layers and materials damaged slightly.
- Adhesion 3 More force needed to separate the layers and both materials damaged.
- Adhesion 5 Layers impossible to pull apart, both tear immediately.
Landscapes
- Laminated Bodies (AREA)
- Extrusion Moulding Of Plastics Or The Like (AREA)
- Polyesters Or Polycarbonates (AREA)
Abstract
Description
Claims
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP96908290A EP0819058A1 (en) | 1995-04-06 | 1996-04-04 | Compostible laminate |
AU51598/96A AU5159896A (en) | 1995-04-06 | 1996-04-04 | Compostible laminate |
JP53009596A JP2002503160A (en) | 1995-04-06 | 1996-04-04 | Compostable laminate |
Applications Claiming Priority (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FI951637 | 1995-04-06 | ||
FI951637A FI951637A (en) | 1995-04-06 | 1995-04-06 | Packaging |
GBGB9507263.3A GB9507263D0 (en) | 1995-04-07 | 1995-04-07 | Compostible laminate |
GB9507263.3 | 1995-04-07 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO1996031347A1 true WO1996031347A1 (en) | 1996-10-10 |
Family
ID=26159944
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/GB1996/000819 WO1996031347A1 (en) | 1995-04-06 | 1996-04-04 | Compostible laminate |
Country Status (5)
Country | Link |
---|---|
EP (1) | EP0819058A1 (en) |
JP (1) | JP2002503160A (en) |
AU (1) | AU5159896A (en) |
CA (1) | CA2217640A1 (en) |
WO (1) | WO1996031347A1 (en) |
Cited By (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2000001530A1 (en) * | 1998-07-07 | 2000-01-13 | Enso Oyj | Compostable coated paper or paperboard, a method for manufacturing the same and products obtained thereof |
EP1160379A2 (en) † | 2000-05-31 | 2001-12-05 | Oji Paper Co., Ltd. | Paper for use in molding |
CN1079408C (en) * | 1998-10-12 | 2002-02-20 | 中国科学院广州化学研究所 | Biodegradable polymer blended film and preparation method therefor |
CN1104326C (en) * | 1999-12-22 | 2003-04-02 | 平湖市比例包装材料有限公司 | Composite material for packing food and its preparing process |
EP2123450A1 (en) * | 2008-05-19 | 2009-11-25 | Honeywell International Inc. | Enhance performance on current renewable film using functional polymer coatings |
CN102400418A (en) * | 2011-11-23 | 2012-04-04 | 成都东航塑胶有限公司 | Waterproof packing paper |
US8182889B2 (en) | 2007-08-23 | 2012-05-22 | Innovia Films, Limited | Packaging article |
US8637126B2 (en) | 2006-02-06 | 2014-01-28 | International Paper Co. | Biodegradable paper-based laminate with oxygen and moisture barrier properties and method for making biodegradable paper-based laminate |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN102444056B (en) * | 2010-10-12 | 2016-08-10 | 龙盟环保纸(集团)有限公司 | Five layers of decomposable asymmetric choice net or the environment protecting paper of degraded and manufacture method thereof |
Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0534471A1 (en) * | 1991-09-27 | 1993-03-31 | Toppan Printing Co., Ltd. | Composite laminate and method for the manufacture thereof |
JPH0664111A (en) * | 1992-08-24 | 1994-03-08 | Toppan Printing Co Ltd | Paper vessel |
WO1994009210A1 (en) * | 1992-10-16 | 1994-04-28 | Pearlstein, Leonard | Compostable packaging for containment of liquids |
JPH06278741A (en) * | 1993-03-25 | 1994-10-04 | Toppan Printing Co Ltd | Plastic paper container |
JPH06293113A (en) * | 1993-04-08 | 1994-10-21 | Toppan Printing Co Ltd | Production of laminate |
-
1996
- 1996-04-04 WO PCT/GB1996/000819 patent/WO1996031347A1/en not_active Application Discontinuation
- 1996-04-04 CA CA002217640A patent/CA2217640A1/en not_active Abandoned
- 1996-04-04 JP JP53009596A patent/JP2002503160A/en active Pending
- 1996-04-04 EP EP96908290A patent/EP0819058A1/en not_active Ceased
- 1996-04-04 AU AU51598/96A patent/AU5159896A/en not_active Abandoned
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0534471A1 (en) * | 1991-09-27 | 1993-03-31 | Toppan Printing Co., Ltd. | Composite laminate and method for the manufacture thereof |
JPH0664111A (en) * | 1992-08-24 | 1994-03-08 | Toppan Printing Co Ltd | Paper vessel |
WO1994009210A1 (en) * | 1992-10-16 | 1994-04-28 | Pearlstein, Leonard | Compostable packaging for containment of liquids |
JPH06278741A (en) * | 1993-03-25 | 1994-10-04 | Toppan Printing Co Ltd | Plastic paper container |
JPH06293113A (en) * | 1993-04-08 | 1994-10-21 | Toppan Printing Co Ltd | Production of laminate |
Non-Patent Citations (3)
Title |
---|
DATABASE WPI Section Ch Week 9414, Derwent World Patents Index; Class A14, AN 94-114861, XP002007487 * |
DATABASE WPI Section Ch Week 9444, Derwent World Patents Index; Class A92, AN 94-354371, XP002007486 * |
DATABASE WPI Section Ch Week 9502, Derwent World Patents Index; Class A23, AN 95-009350, XP002007485 * |
Cited By (14)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2002519222A (en) * | 1998-07-07 | 2002-07-02 | エンソ オーワイジェー | Coated paper or paperboard that can be composted, its preparation and products obtained therefrom |
US6645584B1 (en) | 1998-07-07 | 2003-11-11 | Enso Oyj | Compostable coated paper or paperboard, a method for manufacturing the same and products obtained thereof |
WO2000001530A1 (en) * | 1998-07-07 | 2000-01-13 | Enso Oyj | Compostable coated paper or paperboard, a method for manufacturing the same and products obtained thereof |
JP4664502B2 (en) * | 1998-07-07 | 2011-04-06 | エンソ オーワイジェー | Coated paper or paperboard capable of being composted, process for producing the same and products obtained therefrom |
CN1079408C (en) * | 1998-10-12 | 2002-02-20 | 中国科学院广州化学研究所 | Biodegradable polymer blended film and preparation method therefor |
CN1104326C (en) * | 1999-12-22 | 2003-04-02 | 平湖市比例包装材料有限公司 | Composite material for packing food and its preparing process |
EP1160379A2 (en) † | 2000-05-31 | 2001-12-05 | Oji Paper Co., Ltd. | Paper for use in molding |
EP1160379B2 (en) † | 2000-05-31 | 2011-03-16 | Oji Paper Co., Ltd. | Paper for use in molding |
US8637126B2 (en) | 2006-02-06 | 2014-01-28 | International Paper Co. | Biodegradable paper-based laminate with oxygen and moisture barrier properties and method for making biodegradable paper-based laminate |
US8709559B2 (en) | 2007-08-23 | 2014-04-29 | Innovia Films, Ltd. | Packaging article |
US9656787B2 (en) | 2007-08-23 | 2017-05-23 | Innovia Films Limited | Packaging article |
US8182889B2 (en) | 2007-08-23 | 2012-05-22 | Innovia Films, Limited | Packaging article |
EP2123450A1 (en) * | 2008-05-19 | 2009-11-25 | Honeywell International Inc. | Enhance performance on current renewable film using functional polymer coatings |
CN102400418A (en) * | 2011-11-23 | 2012-04-04 | 成都东航塑胶有限公司 | Waterproof packing paper |
Also Published As
Publication number | Publication date |
---|---|
EP0819058A1 (en) | 1998-01-21 |
CA2217640A1 (en) | 1996-10-10 |
AU5159896A (en) | 1996-10-23 |
JP2002503160A (en) | 2002-01-29 |
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