GB2441984A - Biodegradable paper board - Google Patents

Biodegradable paper board Download PDF

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Publication number
GB2441984A
GB2441984A GB0618722A GB0618722A GB2441984A GB 2441984 A GB2441984 A GB 2441984A GB 0618722 A GB0618722 A GB 0618722A GB 0618722 A GB0618722 A GB 0618722A GB 2441984 A GB2441984 A GB 2441984A
Authority
GB
United Kingdom
Prior art keywords
layer
bio
paper board
degradable
paper
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.)
Withdrawn
Application number
GB0618722A
Other versions
GB0618722D0 (en
Inventor
Hsi-Ching Chang
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Priority to GB0618722A priority Critical patent/GB2441984A/en
Publication of GB0618722D0 publication Critical patent/GB0618722D0/en
Priority to GB0718593A priority patent/GB2443613B/en
Publication of GB2441984A publication Critical patent/GB2441984A/en
Withdrawn legal-status Critical Current

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
    • 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
    • B32B29/007—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 next to a foam 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
    • 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
    • B32B27/08—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 synthetic resin
    • 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
    • B32B27/36—Layered products comprising a layer of synthetic resin comprising polyesters
    • 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
    • B32B37/15—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding characterised by the properties of the layers with at least one layer being manufactured and immediately laminated before reaching its stable state, e.g. in which a layer is extruded and laminated while in semi-molten state
    • 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
    • B32B5/18—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 features of a layer of foamed 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
    • B32B9/00—Layered products comprising a layer of a particular substance not covered by groups B32B11/00 - B32B29/00
    • B32B9/02—Layered products comprising a layer of a particular substance not covered by groups B32B11/00 - B32B29/00 comprising animal or vegetable substances, e.g. cork, bamboo, starch
    • 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
    • B65D65/00—Wrappers or flexible covers; Packaging materials of special type or form
    • B65D65/38—Packaging materials of special type or form
    • B65D65/46—Applications of disintegrable, dissolvable or edible materials
    • B65D65/466—Bio- or photodegradable packaging materials
    • 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
    • D21H19/20—Coatings without pigments applied in a form other than the aqueous solution defined in group D21H19/12 comprising macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds
    • 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
    • D21H19/28—Polyesters
    • 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
    • D21H19/36—Coatings with pigments
    • D21H19/44—Coatings with pigments characterised by the other ingredients, e.g. the binder or dispersing agent
    • D21H19/54—Starch
    • 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
    • B32B2266/00—Composition of foam
    • B32B2266/02—Organic
    • B32B2266/0214—Materials belonging to B32B27/00
    • B32B2266/0264—Polyester
    • 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
    • B32B2307/40—Properties of the layers or laminate having particular optical properties
    • B32B2307/402—Coloured
    • 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
    • B32B2307/716—Degradable
    • B32B2307/7163—Biodegradable
    • 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
    • B32B2317/00—Animal or vegetable based
    • B32B2317/20—Starch
    • 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
    • B32B2323/046—LDPE, i.e. low density 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
    • B32B2367/00—Polyesters, e.g. PET, i.e. polyethylene terephthalate
    • 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
    • B32B2398/00—Unspecified macromolecular compounds
    • 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
    • B32B2439/00—Containers; Receptacles
    • B32B2439/40—Closed containers
    • B32B2439/62—Boxes, cartons, cases
    • 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
    • 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
    • D21H21/00—Non-fibrous material added to the pulp, characterised by its function, form or properties; Paper-impregnating or coating material, characterised by its function, form or properties
    • D21H21/50—Non-fibrous material added to the pulp, characterised by its function, form or properties; Paper-impregnating or coating material, characterised by its function, form or properties characterised by form
    • D21H21/56—Foam
    • 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
    • D21H27/10—Packing paper

Landscapes

  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Biodiversity & Conservation Biology (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Paper (AREA)
  • Laminated Bodies (AREA)
  • Wrappers (AREA)

Abstract

A bio-degradable paper board includes a paper board (10) and a bio-degradable layer (20) that is coated to the paper board by an extrusion-coating machine. The bio-degradable foam-type layer may be a layer of polylactic acid (PLA), polyethylene terephthalate (PET) or corn starch.

Description

* -i. 2441984
RIO-DEGRADABLE PAPER BOARD
FIELD OF THE INVENTION
The present invention relates to a bio-degradable paper board having a coating made by Polylactic Acid (PLA), Polyethylene Terephthalate (PET) or corn starch material and food is stored in a box made by the bio-degradable board and in contact with the coating.
BACKGROUND OF THE INVENTION
A conventional food box made by paper material generally includes a paper board and a layer which is glued to the outside of the food box. The layer includes printed patters and does not contact the food. The layer is made by polyethylene (PB), polypropylene (PP), polyvinyl chloride (PVC) or corn starch.
Only the corn starch is bio-degradable. The layer has to be made to have a certain thickness and patterns are printed on the layer before the layer is glued to the food box. An adhesive is located between the outside of the paper box and the layer. Besides, the layer is not directly connected to the food box, the layer might be peeled off if the adhesive is not applied evenly on the surface of the paper-made food box. Furthermore, the layer has to be made to have a certain thickness so that it includes a higher manufacturing cost. Most important is that PE, PP and PVC cannot be bio-degraded.
The present invention intends to provide a bio-degradable paper board which can be made into food boxes and includes a layer of PET or PLA which is coated on the paper board directly by extrusion-coating machine.
SUMMARY OF THE INVENTION
According to the invention, there is provided a bio-degradable paper board comprising: a paper board and a bio-degradable layer being coated to the paper board by extrusion-coating machine.
The present invention relates to a bio-degradable paper board that comprises a paper board and a bio-dcgradable layer is coated to the paper board by extrusion-coating machine. The bio-degradable layer can be a layer of Polylactic Acid (PLA), Polyethylene Terephthalate (PET) or corn starch. The paper board with the bio-degradable layer can be made to be food containers and the bio-degradable layer can be in contact with food directly. * -4-
BRIEF DESCRIPTION OF THE DRAWINGS
The invention will now be further described, by way of example only, and with reference to the accompanying drawings given for purposes of illustration only, in which: Figure 1 shows a preferred embodiment of a paper roll according to the invention, and Figure 2 is a cross-sectional view through the paper roll of Figure 1, showing the bio-degradable layer on the paper board.
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT
Referring to Figures 1 and 2, the paper board 10 of the present invention is in a form of a paper roll and a bio-degradable layer 20 is coated to the paper board 10 by extrusion-coating machine. The bio-degradable layer 20 is a layer of Polylactic Acid (PLA), Polyethylene Terephthalate (PET) or corn starch.
The bio-degradable layer 20 can be made from PET such as Biornax (Reg. TM) PET by DuPont, bio-degradable PET particles by Far-Eastern Textile Ltd (Taiwan), Polylactic Acid (PLA) particles by Nature works L.L.C., or corn starch. The material is heated to be liquid and extruded by an extruder and the liquid is extruded by T-Die to be foam-type layer 20. The paper board 10 is in a form of a paper roll which is pre-heated and then treated by corona treatment.
The foam type layer 20 is applied on the paper board 10 and both of which are fed between silicon rollers and cooling rollers to evenly press the * -6-layer 20 on the paper board 10. The material of the layer 20 is combined with fibers of the paper board 10. The pressed paper board 10 and the layer 20 are then treated by another corona treatment to open the orifices of the paper board 10. The paper board lOis then can be cut and folded to be food containers.
There is no adhesive located between the bio-degradable layer 20 and the paper board 10 arid the bio-degradable layer 20 does not need to be made to be a certain thickness so that the procedures are simplified and the manufacturing cost is reduced. The paper board 10 and the layer 20 are both bio-degradable and the material of the bio-degradable layer 20 can be degraded into water and carbon dioxide within few months. The paper board 10 is sold in a form of paper roll which can be cut as desired.
While we have shown and described the embodiment in accordance with the present invention, it should be clear to those skilled in the art that further embodiments may be made without departing from the scope of the present invention as defined by the appended claims. * -8-

Claims (5)

  1. CLAIMS: I. A bio-degradable paper hoard comprising: a paper board and a
    bio-degradable layer being coated to the paper board by extrusion-coating machine.
  2. 2. A bio-degradable paper board as claimed in claim 1, wherein the bio-degradable layer is a layer of Polylactic Acid (PLA).
  3. 3. A bio-degradable paper board as claimed in claim 1, wherein the bio-degradable layer is a layer of PET.
  4. 4. A bio-degradable paper board as claimed in claim 1, wherein the bio-degradable layer is a layer of corn starch.
  5. 5. . A bio-degradable paper board, substantially as herein described, with reference to or as shown in the accompanying drawings.
GB0618722A 2006-09-22 2006-09-22 Biodegradable paper board Withdrawn GB2441984A (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
GB0618722A GB2441984A (en) 2006-09-22 2006-09-22 Biodegradable paper board
GB0718593A GB2443613B (en) 2006-09-22 2007-09-21 Method for manufacturing bio-degradable paperboard

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB0618722A GB2441984A (en) 2006-09-22 2006-09-22 Biodegradable paper board

Publications (2)

Publication Number Publication Date
GB0618722D0 GB0618722D0 (en) 2006-11-01
GB2441984A true GB2441984A (en) 2008-03-26

Family

ID=37421467

Family Applications (2)

Application Number Title Priority Date Filing Date
GB0618722A Withdrawn GB2441984A (en) 2006-09-22 2006-09-22 Biodegradable paper board
GB0718593A Expired - Fee Related GB2443613B (en) 2006-09-22 2007-09-21 Method for manufacturing bio-degradable paperboard

Family Applications After (1)

Application Number Title Priority Date Filing Date
GB0718593A Expired - Fee Related GB2443613B (en) 2006-09-22 2007-09-21 Method for manufacturing bio-degradable paperboard

Country Status (1)

Country Link
GB (2) GB2441984A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2010091536A1 (en) * 2009-02-16 2010-08-19 伟盟工业股份有限公司 Polylactic acid paperboard and food container formed therefrom

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111172810A (en) * 2020-01-07 2020-05-19 华南理工大学 Completely biodegradable heat-sealing paper and preparation method and application thereof

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0514137A2 (en) * 1991-05-13 1992-11-19 MITSUI TOATSU CHEMICALS, Inc. Degradable laminate composition
WO1998053141A1 (en) * 1997-05-23 1998-11-26 Cargill, Incorporated Polylactide coated paper
DE202005011641U1 (en) * 2005-04-27 2005-10-13 Chang, Hsi-Ching, Lugang Biodegradable cardboard

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH06270368A (en) * 1993-03-17 1994-09-27 Toppan Printing Co Ltd Laminate and its production
FI100258B (en) * 1996-06-04 1997-10-31 Fortum Heat And Gas Oy Polylactide coated paper and method of making the same

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0514137A2 (en) * 1991-05-13 1992-11-19 MITSUI TOATSU CHEMICALS, Inc. Degradable laminate composition
WO1998053141A1 (en) * 1997-05-23 1998-11-26 Cargill, Incorporated Polylactide coated paper
DE202005011641U1 (en) * 2005-04-27 2005-10-13 Chang, Hsi-Ching, Lugang Biodegradable cardboard

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2010091536A1 (en) * 2009-02-16 2010-08-19 伟盟工业股份有限公司 Polylactic acid paperboard and food container formed therefrom

Also Published As

Publication number Publication date
GB2443613A (en) 2008-05-14
GB0718593D0 (en) 2007-12-19
GB2443613B (en) 2011-03-02
GB0618722D0 (en) 2006-11-01

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