EP2862815B1 - Method for manufacturing a moulded fibre packaging and moulded fibre food packaging - Google Patents
Method for manufacturing a moulded fibre packaging and moulded fibre food packaging Download PDFInfo
- Publication number
- EP2862815B1 EP2862815B1 EP13188739.0A EP13188739A EP2862815B1 EP 2862815 B1 EP2862815 B1 EP 2862815B1 EP 13188739 A EP13188739 A EP 13188739A EP 2862815 B1 EP2862815 B1 EP 2862815B1
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- EP
- European Patent Office
- Prior art keywords
- lignocellulosic biomass
- fibres
- fibre
- visible
- pulp
- 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.)
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- 239000000835 fiber Substances 0.000 title claims description 62
- 238000000034 method Methods 0.000 title claims description 53
- 235000013305 food Nutrition 0.000 title claims description 20
- 238000004806 packaging method and process Methods 0.000 title claims description 18
- 238000004519 manufacturing process Methods 0.000 title claims description 13
- 239000002029 lignocellulosic biomass Substances 0.000 claims description 97
- 238000007670 refining Methods 0.000 claims description 21
- 244000025254 Cannabis sativa Species 0.000 claims description 17
- 238000007781 pre-processing Methods 0.000 claims description 16
- 102000004169 proteins and genes Human genes 0.000 claims description 15
- 108090000623 proteins and genes Proteins 0.000 claims description 15
- 238000000465 moulding Methods 0.000 claims description 12
- 238000002791 soaking Methods 0.000 claims description 9
- 230000003993 interaction Effects 0.000 claims description 7
- 239000000126 substance Substances 0.000 claims description 7
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 7
- 241000227653 Lycopersicon Species 0.000 claims description 6
- 239000010902 straw Substances 0.000 claims description 4
- 240000002791 Brassica napus Species 0.000 claims description 3
- 235000004977 Brassica sinapistrum Nutrition 0.000 claims description 3
- 125000003118 aryl group Chemical group 0.000 claims description 3
- 238000005520 cutting process Methods 0.000 claims description 3
- 229930002875 chlorophyll Natural products 0.000 claims description 2
- 235000019804 chlorophyll Nutrition 0.000 claims description 2
- ATNHDLDRLWWWCB-AENOIHSZSA-M chlorophyll a Chemical compound C1([C@@H](C(=O)OC)C(=O)C2=C3C)=C2N2C3=CC(C(CC)=C3C)=[N+]4C3=CC3=C(C=C)C(C)=C5N3[Mg-2]42[N+]2=C1[C@@H](CCC(=O)OC\C=C(/C)CCC[C@H](C)CCC[C@H](C)CCCC(C)C)[C@H](C)C2=C5 ATNHDLDRLWWWCB-AENOIHSZSA-M 0.000 claims description 2
- 239000002023 wood Substances 0.000 description 14
- 235000013601 eggs Nutrition 0.000 description 9
- 239000005022 packaging material Substances 0.000 description 6
- 229920001131 Pulp (paper) Polymers 0.000 description 5
- 230000000694 effects Effects 0.000 description 4
- 239000002994 raw material Substances 0.000 description 3
- 238000004040 coloring Methods 0.000 description 2
- 238000001035 drying Methods 0.000 description 2
- 235000013399 edible fruits Nutrition 0.000 description 2
- 230000007613 environmental effect Effects 0.000 description 2
- 238000003860 storage Methods 0.000 description 2
- 241000219310 Beta vulgaris subsp. vulgaris Species 0.000 description 1
- 239000002028 Biomass Substances 0.000 description 1
- 241000196324 Embryophyta Species 0.000 description 1
- 235000021536 Sugar beet Nutrition 0.000 description 1
- 229920002522 Wood fibre Polymers 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000003139 buffering effect Effects 0.000 description 1
- 239000000969 carrier Substances 0.000 description 1
- 229920002678 cellulose Polymers 0.000 description 1
- 239000001913 cellulose Substances 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 239000003086 colorant Substances 0.000 description 1
- 238000012669 compression test Methods 0.000 description 1
- 239000000356 contaminant Substances 0.000 description 1
- 230000001627 detrimental effect Effects 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000004794 expanded polystyrene Substances 0.000 description 1
- 235000012055 fruits and vegetables Nutrition 0.000 description 1
- 229910052739 hydrogen Inorganic materials 0.000 description 1
- 239000001257 hydrogen Substances 0.000 description 1
- 238000002372 labelling Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 235000013372 meat Nutrition 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 238000007639 printing Methods 0.000 description 1
- 239000004576 sand Substances 0.000 description 1
- -1 staples Substances 0.000 description 1
- 229920002994 synthetic fiber Polymers 0.000 description 1
Images
Classifications
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21J—FIBREBOARD; MANUFACTURE OF ARTICLES FROM CELLULOSIC FIBROUS SUSPENSIONS OR FROM PAPIER-MACHE
- D21J7/00—Manufacture of hollow articles from fibre suspensions or papier-mâché by deposition of fibres in or on a wire-net mould
-
- 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
- B65D85/00—Containers, packaging elements or packages, specially adapted for particular articles or materials
- B65D85/30—Containers, packaging elements or packages, specially adapted for particular articles or materials for articles particularly sensitive to damage by shock or pressure
- B65D85/32—Containers, packaging elements or packages, specially adapted for particular articles or materials for articles particularly sensitive to damage by shock or pressure for eggs
- B65D85/324—Containers with compartments made of pressed material
-
- 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
- D21H11/00—Pulp or paper, comprising cellulose or lignocellulose fibres of natural origin only
- D21H11/12—Pulp from non-woody plants or crops, e.g. cotton, flax, straw, bagasse
-
- 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
- D21H17/00—Non-fibrous material added to the pulp, characterised by its constitution; Paper-impregnating material characterised by its constitution
- D21H17/03—Non-macromolecular organic compounds
- D21H17/05—Non-macromolecular organic compounds containing elements other than carbon and hydrogen only
- D21H17/12—Organo-metallic compounds
-
- 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
- D21H21/14—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 function or properties in or on the paper
- D21H21/28—Colorants ; Pigments or opacifying agents
Definitions
- the present invention relates to a method for manufacturing a moulded fibre packaging in particular a food package , more particular an egg package.
- Such a method is known, e.g. from DE-A-19618554 .
- fibre packaging materials such as egg boxes and fibre trays are uniform in colour.
- such fibre packaging materials are less appealing to the customer.
- the package as a whole could be provided with different colours by employing labelling and/or printing techniques, such techniques are generally much too expensive. Consequently, there is a need within the art for a cheap and uncomplicated process for the manufacture of more appealing fibre packaging materials.
- packaging materials for e. g. electronic equipment comprise less attractive materials such as white coloured expanded polystyrene and similar synthetic materials that can be recycled only with difficulty and which are detrimental to the environment.
- white coloured expanded polystyrene and similar synthetic materials that can be recycled only with difficulty and which are detrimental to the environment.
- packaging materials based on paper pulp have to comply with rather severe food regulations, i. e. that the colouring agent used does not leach into and contaminate the food product.
- Articles based on paper pulp are manufactured in a pulp moulding process wherein pulp moulding machines are employed.
- the basic principles of manufacture are to provide recovered paper (including newspaper, magazines) or paper furnish that is re-pulped. Relevant regulation for recovered paper in this connection is for example EN 643.
- various chemicals may be added to the pulp. For example, chemicals are added to give finished products water resistance, wet strength and/or colour.
- the pulp is cleaned of contaminants such as staples, sand and plastic particles, and transferred to the moulding machine.
- the moulding dies of the machine are dipped into the pulp and a vacuum is applied to the die and in that way a product is created.
- the wet product is placed on a conveyor belt and sent through a drying tunnel. Finally, the dried products may be pressed, counted, bundled, printed, labelled, palletised and despatched to the end user.
- the invention aims to provide a method for manufacturing a moulded fibre food packaging in particular an egg package, which method enables to obtain a package in a more environmental friendly way. It will be clear that the invention is also beneficial for fruit and vegetable packages, cup carriers and industrial buffering means.
- Yet another object of the invention is to provide a food package which appearance is more appealing to the customer during display and/or use.
- a moulded fibre packaging in particular a food package , more particular an egg package, comprising,
- the lignocellulosic biomass containing between 0 to 2% protein in dry weight enables to perform the method in an economical that is to obtain packages therewith that can compete in the market.
- ordinary grass containing much more protein, does suffer from bad drainage, long drying times and/or high energy consumption which lead to slow production and/or high production cost.
- the high content of lignocellulosic biomass not originating from wood wherein the lignocellulosic biomass contains between 0 to 2% protein in dry weight enables to optimize operations in that a choice can be made between raw material flow being ordinary pulp originating from paper thus wood and the lignocellulosic biomass not originating from wood. Also the production process is much more efficient.
- the high content lignocellulosic biomass not originating from wood enables to provide a package a "green" appearance.
- packages obtained by the method according to the invention perform surprisingly well in known compression tests for egg packages. This was not expected because lignocellulosic biomass not originating from wood is much weaker than wood based fibres. It is found that about 50% lignocellulosic biomass not originating from wood still provides the effect of the invention without compromising too much on strength of the package.
- the lignocellulosic biomass not originating from wood being added to the wood based fibre pulp at a rate of 5-80 % lignocellulosic biomass, preferably between 5-60% lignocellulosic biomass on dry fibre weight enables to manufacturing a moulded fibre food packaging in a an environmental friendly way without compromising too much on strength of the package.
- using lignocellulosic biomass not originating from wood as raw material for the fibre pulp mix aims at becoming less independent of wood fibres. This is necessary when paper as journals will become less available what will lead to higher prices of paper in the future.
- the lignocellulosic biomass originates from grass, leaves of tomato plants, stems of tomato plants, and/or rapeseed straw.
- the grass originates preferably from controlled cultivation such that regulation in connection with food contact may be respected with more ease. More preferably this controlled cultivation does not involve fertilizing. It is conceivable to use other grass as well like roadside grass for non food packages. It will be understood that the invention is not limited to grass fibres including other gramineous plants. It is conceivable that other natural fibres, other than wood, like straw fibres, sugar beet residue, are used in the invention.
- the method comprises, before adding the lignocellulosic biomass to the pulp container, processing the lignocellulosic biomass for removing protein from the lignocellulosic biomass such that the lignocellulosic biomass contains between 0 to 2% protein in dry weight.
- processing the lignocellulosic biomass for removing protein from the lignocellulosic biomass such that the lignocellulosic biomass contains between 0 to 2% protein in dry weight.
- the method comprises pre-processing of the lignocellulosic biomass, the pre-processing comprising soaking the lignocellulosic biomass in water for a soaking period of at least 1 day preferably at least 2 days.
- Pre-processing here means processing the lignocellulosic biomass before adding the lignocellulosic biomass to the pulp container.
- the pre-processing comprises cutting the lignocellulosic biomass, preferably before the soaking, for obtaining visible lignocellulosic biomass fibres having a length such that the visible lignocellulosic biomass fibres may surface on the fibre pulp mix, the visible lignocellulosic biomass fibres preferably having an average length smaller than 5 cm, preferably smaller than 2 cm, more preferably between 1,5 and 2 cm.
- the visible lignocellulosic biomass fibres having a length such that the fibres may surface on the fibre pulp mix ensure that during moulding these relatively long fibres are positioned at a package surface. These long fibres are then visible on a package and can be distinguished by touch. This provides an improved appearance to the food package.
- visible has its ordinary meaning that the fibre can be seen with the naked eye without any aid. It will therefore be understood that fibre does not refer to fibres on cellulose level. Instead a fibre here is on biomass level and may have a width typical between 0.1 mm to 2 mm.
- the pre-processing comprises refining the visible lignocellulosic biomass fibres for facilitating interaction between the fibre pulp and the visible lignocellulosic biomass fibres in the pulp mix.
- Refining is a process which is known per se in the paper and paper pulp processing industry. The interaction has both a mechanical and chemical component, a mechanical component in that binding surface between fibres is increased, and a chemical component in that e.g. forming of hydrogen bridges is promoted. This refining seems important in connection with strength of the thus manufactured package.
- the pre-processing comprises adjusting the degree of refining the visible lignocellulosic biomass fibres for facilitating firstly interaction between the fibre pulp and the visible lignocellulosic biomass fibre in the pulp mix, and secondly allowing a portion of the visible lignocellulosic biomass fibres to surface on the pulp mix. Because of the adjusting, an optimum can be chosen for both the strength of the package and the so called "green" appearance.
- the pre-processing comprises providing a refining device comprising a number of refiner discs arranged at a mutual disc distance wherein adjusting the degree of refining the visible lignocellulosic biomass fibres comprises adjusting the disc distance less than 1,5 mm, preferably between 0,5 and 1,5 mm, and wherein the refining comprises refining the visible lignocellulosic biomass fibres at a concentration of between 10 kg to 75 kg, preferably about 25 kg visible lignocellulosic biomass fibres in dry weight, per 1000 litre of water.
- a refiner is a Sprout Waldron disc refiner.
- the refining comprising fibrillating the visible lignocellulosic biomass fibres for increasing binding surface of the visible lignocellulosic biomass fibres. This even more for facilitates interaction between the fibre pulp and the visible lignocellulosic biomass fibres in the pulp mix.
- fibrillate means the partly splitting of a fibre into fibrils.
- the method comprises providing a vacuum mould which has a mesh work for sucking up said fibre pulp mix and forming the packaging, wherein the mesh work has mesh openings having a mesh size and the visible lignocellulosic biomass fibres have a length between 50 to 150 times the mesh size, preferably about 100 times the mesh size. This ensures that the visible lignocellulosic biomass fibres extend lengthwise along the mould such that the fibre is visible at a surface of the manufactured package.
- a typical mesh size for moulding packages is 60 Tyler Mesh which corresponds with a mesh size of 0.251 mm.
- the method comprises the step of adding an aromatic substance to the fibre pulp mix for providing a grass smell to the moulded fibre food packaging.
- the possibly grassy smell can be strengthened or covered as desired by the addition of the aromatic substance.
- the pulp mix is coloured by adding a colour agency, preferably a green colour agency comprising chlorophyll, to the fibre pulp mix.
- a colour agency preferably a green colour agency comprising chlorophyll
- the visible lignocellulosic biomass fibres are coloured before adding the visible lignocellulosic biomass fibres to the fibre pulp mix to provide an increased contrast between the grass fibre and the moulded fibre package. This even more improves the appealing effect of the package.
- colouring fibres before adding these to the pulp specific reference is made to WO/2006/091102 of HUHTAMAKI MOLDED FIBER TECHNOLOGY B.V. titled "PROCESS FOR THE MANUFACTURE OF A MOTTLED FIBRE PACKAGING".
- the invention further provides a moulded fibre packaging in particular a food package , more particular an egg package obtained by the method according to the invention, the packaging comprising between 10 to 60 wt. % lignocellulosic biomass not originating from wood.
- visible lignocellulosic biomass fibres protrude from a package surface to such an extent that separate visible lignocellulosic biomass fibres can be distinguished by sight and/or touch. This even more improves the appealing effect of the package.
- a moulded fibre egg package 1 is shown.
- the package 1 is made from moulded fibre containing about 50 % grass fibres.
- Grass fibres 12 protrude from a package outside surface 2 to such an extent that separate grass fibres can be distinguished by sight and/or touch.
- These longer grass fibres 12 have a length of about 25 mm.
- the longer grass fibres 12 have a length such that the fibres are able to float on a fibre pulp which enables that during moulding these long fibres are positioned at the package surface.
- These protruding fibres 12 even more improve the appealing effect of the package 1.
- Grass fibres 12 protrude even more from a package inside surface 3, 4 also because that inside surface is determined by the suction side of a mould. This suction side of a mould is a well known concept in manufacturing a moulded fibre food packaging.
- Fig. 3 shows a detail of an outer surface 2 of the package 1.
- Fig. 4 shows a process scheme of an embodiment of the method according to the invention.
- a fibre pulp, for a moulding process is contained in a pulp container 9 also referred to as storage tank and also known as thick stock tank.
- the process of moulding a moulded fibre package is indicate with reference number 11 and is not described here since this is known per se.
- Such a process of moulding a moulded fibre package is fed with the fibre pulp mix from the pulp container 9.
- lignocellulosic biomass not originating from wood 5 is added to the pulp container 9 to obtain a pulp mix comprising between 5-60% lignocellulosic biomass, wherein the lignocellulosic biomass contains between 0 to 2% protein in dry weight.
- the method comprises pre-processing of the lignocellulosic biomass 5. This pre-processing may be done on site or (partly) elsewhere. When the lignocellulosic biomass is pre-processed elsewhere, the lignocellulosic biomass fibres may be added directly to the pulp container 9 which added lignocellulosic biomass fibres are indicated with reference number 10.
- the pre-processing comprises soaking 6 the lignocellulosic biomass 5 in water for a soaking period of at least 1 day preferably at least 2 days.
- the pre-processing comprises cutting 7 the lignocellulosic biomass 5, preferably before the soaking 6, for obtaining visible lignocellulosic biomass fibres having a length such that the visible lignocellulosic biomass fibres may surface on the fibre pulp mix in the storage tank 9.
- the pre-processing comprises refining 8 the visible lignocellulosic biomass fibres for facilitating interaction between the fibre pulp and the visible lignocellulosic biomass fibres in the pulp mix.
- the refining is performed in a refining device (not shown) comprising a number of refiner discs arranged at a mutual disc distance.
- the degree of refining the visible lignocellulosic biomass fibres is set by adjusting the disc distance between 0,5 and 1,5 mm.
- the refining of the visible lignocellulosic biomass fibres is done at a concentration of between 10 kg to 75 kg, preferably about 25 kg visible lignocellulosic biomass fibres in dry weight, per 1000 litre of water.
- An example of such a refiner is a Sprout Waldron disc refiner.
- the lignocellulosic biomass Before adding the lignocellulosic biomass 5 to the pulp container 9, the lignocellulosic biomass may be processed for removing protein from the lignocellulosic biomass such that the lignocellulosic biomass contains between 0 to 2% protein in dry weight. This process is not shown here.
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- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Mechanical Engineering (AREA)
- Containers Having Bodies Formed In One Piece (AREA)
- Paper (AREA)
- Packaging Frangible Articles (AREA)
- Packages (AREA)
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- Processing Of Meat And Fish (AREA)
Description
- The present invention relates to a method for manufacturing a moulded fibre packaging in particular a food package , more particular an egg package.
- Such a method is known, e.g. from
DE-A-19618554 . - In many modem food retailing operations, e. g. supermarkets and hardware stores, various products like fruit, meat, eggs and the like, are presented and displayed to the retail customer in trays of many types and sizes, said trays being manufactured from paper pulp. Often the colour or appearance of such trays, for example egg trays, is e. g. greyish and therefore not attractive or aesthetically appealing to the retail customer.
- In addition, usually, fibre packaging materials such as egg boxes and fibre trays are uniform in colour. However, such fibre packaging materials are less appealing to the customer. Although the package as a whole could be provided with different colours by employing labelling and/or printing techniques, such techniques are generally much too expensive. Consequently, there is a need within the art for a cheap and uncomplicated process for the manufacture of more appealing fibre packaging materials.
- Also packaging materials for e. g. electronic equipment comprise less attractive materials such as white coloured expanded polystyrene and similar synthetic materials that can be recycled only with difficulty and which are detrimental to the environment. At present there exists a long felt need to provide coloured or appealing packaging materials based on paper pulp, in particular for food products such as fruit, that are more appealing to the retail customer. However, such coloured packaging materials based on paper pulp have to comply with rather severe food regulations, i. e. that the colouring agent used does not leach into and contaminate the food product.
- Articles based on paper pulp are manufactured in a pulp moulding process wherein pulp moulding machines are employed. The basic principles of manufacture are to provide recovered paper (including newspaper, magazines) or paper furnish that is re-pulped. Relevant regulation for recovered paper in this connection is for example EN 643. Subsequently, various chemicals may be added to the pulp. For example, chemicals are added to give finished products water resistance, wet strength and/or colour. The pulp is cleaned of contaminants such as staples, sand and plastic particles, and transferred to the moulding machine. The moulding dies of the machine are dipped into the pulp and a vacuum is applied to the die and in that way a product is created. The wet product is placed on a conveyor belt and sent through a drying tunnel. Finally, the dried products may be pressed, counted, bundled, printed, labelled, palletised and despatched to the end user. Reference is for example made to
US 3.320. 120 andUS 3.654.076 . - The invention aims to provide a method for manufacturing a moulded fibre food packaging in particular an egg package, which method enables to obtain a package in a more environmental friendly way. It will be clear that the invention is also beneficial for fruit and vegetable packages, cup carriers and industrial buffering means.
- Yet another object of the invention is to provide a food package which appearance is more appealing to the customer during display and/or use.
- According to the invention this is realized with a method for manufacturing a moulded fibre packaging, in particular a food package , more particular an egg package, comprising,
- providing a fibre pulp for a moulding process, the fibre pulp being contained in a pulp container, the method comprises,
- adding lignocellulosic biomass not originating from wood to the pulp container to obtain a pulp mix comprising between 5-80 % lignocellulosic biomass, preferably between 5-60% lignocellulosic biomass, wherein the lignocellulosic biomass contains between 0 to 2% protein in dry weight.
- The lignocellulosic biomass containing between 0 to 2% protein in dry weight enables to perform the method in an economical that is to obtain packages therewith that can compete in the market. In contract with the current invention; when used in a moulded fibre process, ordinary grass, containing much more protein, does suffer from bad drainage, long drying times and/or high energy consumption which lead to slow production and/or high production cost. The high content of lignocellulosic biomass not originating from wood wherein the lignocellulosic biomass contains between 0 to 2% protein in dry weight enables to optimize operations in that a choice can be made between raw material flow being ordinary pulp originating from paper thus wood and the lignocellulosic biomass not originating from wood. Also the production process is much more efficient. In addition, the high content lignocellulosic biomass not originating from wood enables to provide a package a "green" appearance. Moreover, packages obtained by the method according to the invention perform surprisingly well in known compression tests for egg packages. This was not expected because lignocellulosic biomass not originating from wood is much weaker than wood based fibres. It is found that about 50% lignocellulosic biomass not originating from wood still provides the effect of the invention without compromising too much on strength of the package. Thus, the lignocellulosic biomass not originating from wood being added to the wood based fibre pulp at a rate of 5-80 % lignocellulosic biomass, preferably between 5-60% lignocellulosic biomass on dry fibre weight enables to manufacturing a moulded fibre food packaging in a an environmental friendly way without compromising too much on strength of the package. In addition, using lignocellulosic biomass not originating from wood as raw material for the fibre pulp mix aims at becoming less independent of wood fibres. This is necessary when paper as journals will become less available what will lead to higher prices of paper in the future.
- The lignocellulosic biomass originates from grass, leaves of tomato plants, stems of tomato plants, and/or rapeseed straw. The grass originates preferably from controlled cultivation such that regulation in connection with food contact may be respected with more ease. More preferably this controlled cultivation does not involve fertilizing. It is conceivable to use other grass as well like roadside grass for non food packages. It will be understood that the invention is not limited to grass fibres including other gramineous plants. It is conceivable that other natural fibres, other than wood, like straw fibres, sugar beet residue, are used in the invention.
- The method comprises, before adding the lignocellulosic biomass to the pulp container, processing the lignocellulosic biomass for removing protein from the lignocellulosic biomass such that the lignocellulosic biomass contains between 0 to 2% protein in dry weight. Such a process for removing protein from lignocellulosic biomass is known per se, like from the patent publication
WO 2012/023848 A1 to Danvos B.V . This removing of protein even more enables to optimize operations in that a choice can be made between raw material flows. In the technical field of moulded fibre packaging the pulp container is also referred to with "thin stock tank". - In an embodiment, the method comprises pre-processing of the lignocellulosic biomass, the pre-processing comprising soaking the lignocellulosic biomass in water for a soaking period of at least 1 day preferably at least 2 days. Pre-processing here means processing the lignocellulosic biomass before adding the lignocellulosic biomass to the pulp container.
- In an embodiment of the method, the pre-processing comprises cutting the lignocellulosic biomass, preferably before the soaking, for obtaining visible lignocellulosic biomass fibres having a length such that the visible lignocellulosic biomass fibres may surface on the fibre pulp mix, the visible lignocellulosic biomass fibres preferably having an average length smaller than 5 cm, preferably smaller than 2 cm, more preferably between 1,5 and 2 cm.
- The visible lignocellulosic biomass fibres having a length such that the fibres may surface on the fibre pulp mix ensure that during moulding these relatively long fibres are positioned at a package surface. These long fibres are then visible on a package and can be distinguished by touch. This provides an improved appearance to the food package. In this connection, visible has its ordinary meaning that the fibre can be seen with the naked eye without any aid. It will therefore be understood that fibre does not refer to fibres on cellulose level. Instead a fibre here is on biomass level and may have a width typical between 0.1 mm to 2 mm.
- In an embodiment of the method, the pre-processing comprises refining the visible lignocellulosic biomass fibres for facilitating interaction between the fibre pulp and the visible lignocellulosic biomass fibres in the pulp mix. Refining is a process which is known per se in the paper and paper pulp processing industry. The interaction has both a mechanical and chemical component, a mechanical component in that binding surface between fibres is increased, and a chemical component in that e.g. forming of hydrogen bridges is promoted. This refining seems important in connection with strength of the thus manufactured package.
- In an embodiment of the method, the pre-processing comprises adjusting the degree of refining the visible lignocellulosic biomass fibres for facilitating firstly interaction between the fibre pulp and the visible lignocellulosic biomass fibre in the pulp mix, and secondly allowing a portion of the visible lignocellulosic biomass fibres to surface on the pulp mix. Because of the adjusting, an optimum can be chosen for both the strength of the package and the so called "green" appearance.
- In an embodiment of the method, the pre-processing comprises providing a refining device comprising a number of refiner discs arranged at a mutual disc distance wherein adjusting the degree of refining the visible lignocellulosic biomass fibres comprises adjusting the disc distance less than 1,5 mm, preferably between 0,5 and 1,5 mm, and wherein the refining comprises refining the visible lignocellulosic biomass fibres at a concentration of between 10 kg to 75 kg, preferably about 25 kg visible lignocellulosic biomass fibres in dry weight, per 1000 litre of water. An example of such a refiner is a Sprout Waldron disc refiner.
- In an embodiment of the method, the refining comprising fibrillating the visible lignocellulosic biomass fibres for increasing binding surface of the visible lignocellulosic biomass fibres. This even more for facilitates interaction between the fibre pulp and the visible lignocellulosic biomass fibres in the pulp mix. In this connection, fibrillate means the partly splitting of a fibre into fibrils.
- In an embodiment, the method comprises providing a vacuum mould which has a mesh work for sucking up said fibre pulp mix and forming the packaging, wherein the mesh work has mesh openings having a mesh size and the visible lignocellulosic biomass fibres have a length between 50 to 150 times the mesh size, preferably about 100 times the mesh size. This ensures that the visible lignocellulosic biomass fibres extend lengthwise along the mould such that the fibre is visible at a surface of the manufactured package. A typical mesh size for moulding packages is 60 Tyler Mesh which corresponds with a mesh size of 0.251 mm.
- In an embodiment, the method comprises the step of adding an aromatic substance to the fibre pulp mix for providing a grass smell to the moulded fibre food packaging. The possibly grassy smell can be strengthened or covered as desired by the addition of the aromatic substance.
- In an embodiment, the pulp mix is coloured by adding a colour agency, preferably a green colour agency comprising chlorophyll, to the fibre pulp mix. It is conceivable that the visible lignocellulosic biomass fibres are coloured before adding the visible lignocellulosic biomass fibres to the fibre pulp mix to provide an increased contrast between the grass fibre and the moulded fibre package. This even more improves the appealing effect of the package. In connection with colouring fibres before adding these to the pulp, specific reference is made to
WO/2006/091102 of HUHTAMAKI MOLDED FIBER TECHNOLOGY B.V. titled "PROCESS FOR THE MANUFACTURE OF A MOTTLED FIBRE PACKAGING". - The invention further provides a moulded fibre packaging in particular a food package , more particular an egg package obtained by the method according to the invention, the packaging comprising between 10 to 60 wt. % lignocellulosic biomass not originating from wood.
- In an embodiment of the moulded fibre package, visible lignocellulosic biomass fibres protrude from a package surface to such an extent that separate visible lignocellulosic biomass fibres can be distinguished by sight and/or touch. This even more improves the appealing effect of the package.
- The various aspects discussed in this patent can be combined in order to provide additional advantages.
- The invention will be further elucidated referring to a preferred embodiment shown in the drawing wherein shown in:
-
Fig. 1 in perspective view a package obtained by the method according to the invention; -
fig. 2 a cross sectional side view of the package offig. 1 ; -
fig. 3 a detail of an outer surface of the package offig. 1 ; and -
fig. 4 a simplified process scheme of an embodiment of the method according to the invention. - In the
figure 1 and 2 a mouldedfibre egg package 1 is shown. Thepackage 1 is made from moulded fibre containing about 50 % grass fibres.Grass fibres 12 protrude from a package outsidesurface 2 to such an extent that separate grass fibres can be distinguished by sight and/or touch. Theselonger grass fibres 12 have a length of about 25 mm. Thelonger grass fibres 12 have a length such that the fibres are able to float on a fibre pulp which enables that during moulding these long fibres are positioned at the package surface. These protrudingfibres 12 even more improve the appealing effect of thepackage 1.Grass fibres 12 protrude even more from a package insidesurface -
Fig. 3 shows a detail of anouter surface 2 of thepackage 1. -
Fig. 4 shows a process scheme of an embodiment of the method according to the invention. - A fibre pulp, for a moulding process, is contained in a
pulp container 9 also referred to as storage tank and also known as thick stock tank. The process of moulding a moulded fibre package is indicate withreference number 11 and is not described here since this is known per se. Such a process of moulding a moulded fibre package is fed with the fibre pulp mix from thepulp container 9. - According to the invention, lignocellulosic biomass not originating from
wood 5 is added to thepulp container 9 to obtain a pulp mix comprising between 5-60% lignocellulosic biomass, wherein the lignocellulosic biomass contains between 0 to 2% protein in dry weight. - The method comprises pre-processing of the
lignocellulosic biomass 5. This pre-processing may be done on site or (partly) elsewhere. When the lignocellulosic biomass is pre-processed elsewhere, the lignocellulosic biomass fibres may be added directly to thepulp container 9 which added lignocellulosic biomass fibres are indicated withreference number 10. Here, the pre-processing comprises soaking 6 thelignocellulosic biomass 5 in water for a soaking period of at least 1 day preferably at least 2 days. - Here, the pre-processing comprises cutting 7 the
lignocellulosic biomass 5, preferably before the soaking 6, for obtaining visible lignocellulosic biomass fibres having a length such that the visible lignocellulosic biomass fibres may surface on the fibre pulp mix in thestorage tank 9. - The pre-processing comprises refining 8 the visible lignocellulosic biomass fibres for facilitating interaction between the fibre pulp and the visible lignocellulosic biomass fibres in the pulp mix.
- The refining is performed in a refining device (not shown) comprising a number of refiner discs arranged at a mutual disc distance. The degree of refining the visible lignocellulosic biomass fibres is set by adjusting the disc distance between 0,5 and 1,5 mm. The refining of the visible lignocellulosic biomass fibres is done at a concentration of between 10 kg to 75 kg, preferably about 25 kg visible lignocellulosic biomass fibres in dry weight, per 1000 litre of water. An example of such a refiner is a Sprout Waldron disc refiner.
- Before adding the
lignocellulosic biomass 5 to thepulp container 9, the lignocellulosic biomass may be processed for removing protein from the lignocellulosic biomass such that the lignocellulosic biomass contains between 0 to 2% protein in dry weight. This process is not shown here. - It will also be obvious after the above description and drawings are included to illustrate some embodiments of the invention, and not to limit the scope of protection. Starting from this disclosure, many more embodiments will be evident to a skilled person which are within the scope of protection.
Claims (12)
- Method for manufacturing a moulded fibre packaging (1), in particular a food package, more particular an egg package, comprising,- providing a fibre pulp for a moulding process, the fibre pulp being contained in a pulp container (9), wherein the method comprises,- adding lignocellulosic biomass (5) originating from grass, leaves of tomato plants, stems of tomato plants, and/or rapeseed straw to the pulp container to obtain a pulp mix comprising between 5-80 % lignocellulosic biomass, preferably between 5-60% lignocellulosic biomass, wherein the lignocellulosic biomass contains between 0 to 2% protein in dry weight, and- before adding the lignocellulosic biomass to the pulp container, processing the lignocellulosic biomass for removing protein from the lignocellulosic biomass such that the lignocellulosic biomass contains between 0 to 2% protein in dry weight.
- Method according to claim 1, the method comprising pre-processing of the lignocellulosic biomass, the pre-processing comprising soaking, (6) the lignocellulosic biomass (5) in water for a soaking period of at least 1 day preferably at least 2 days.
- Method according to claim 2, the pre-processing comprising cutting (7) the lignocellulosic biomass, preferably before the soaking, for obtaining visible lignocellulosic biomass fibres having a length such that the visible lignocellulosic biomass fibres may surface on the fibre pulp mix, the visible lignocellulosic biomass fibres preferably having an average length smaller than 5 cm, preferably smaller than 2 cm, more preferably between 1,5 and 2 cm.
- Method according to claim 2 or 3, the pre-processing comprising refining (8) the visible lignocellulosic biomass fibres for facilitating interaction between the fibre pulp and the visible lignocellulosic biomass fibres in the pulp mix.
- Method according to claim 4, comprising adjusting the degree of refining the visible lignocellulosic biomass fibres for facilitating firstly interaction between the fibre pulp and the visible lignocellulosic biomass fibre in the pulp mix, and secondly allowing a portion of the visible lignocellulosic biomass fibres to surface on the pulp mix.
- Method according to claim 5, comprising providing a refining device comprising a number of refiner discs arranged at a mutual disc distance wherein adjusting the degree of refining the visible lignocellulosic biomass fibres comprises adjusting the disc distance less than 1,5 mm, preferably between 0,5 and 1,5 mm, and wherein the refining (8) comprises refining the visible lignocellulosic biomass fibres at a concentration of between 10 kg to 75 kg, preferably about 25 kg visible lignocellulosic biomass fibres in dry weight, per 1000 litre of water.
- Method according to claim 4, 5, or 6, the refining (8) comprising fibrillating the visible lignocellulosic biomass fibres for increasing binding surface of the visible lignocellulosic biomass fibres.
- Method according to a preceding claim, comprising providing a vacuum mould which has a mesh work for sucking up said fibre pulp mix and forming the packaging, wherein the mesh work has mesh openings having a mesh size and the visible lignocellulosic biomass fibres have a length between 50 to 150 times the mesh size, preferably about 100 times the mesh size.
- Method according to a preceding claim, wherein the method comprises the step of adding an aromatic substance to the fibre pulp mix for providing a grass smell to the moulded fibre food packaging.
- Method according to a preceding claim, wherein the pulp mix is coloured by adding a colour agency, preferably a green colour agency comprising chlorophyll, to the fibre pulp mix.
- Moulded fibre food packaging obtained by the method according to a preceding claim, the packaging comprising between 10 to 60 wt. % lignocellulosic biomass originating from grass, leaves of tomato plants, stems of tomato plants, and/or rapeseed straw, wherein the lignocellulosic biomass contains between 0 to 2% protein in dry weight.
- Moulded fibre food package according to claim 11, wherein visible lignocellulosic biomass fibres protrude from a package surface to such an extent that separate visible lignocellulosic biomass fibres can be distinguished by sight and/or touch.
Priority Applications (16)
Application Number | Priority Date | Filing Date | Title |
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HUE13188739A HUE033565T2 (en) | 2013-10-15 | 2013-10-15 | Method for manufacturing a moulded fibre packaging and moulded fibre food packaging |
PL13188739T PL2862815T3 (en) | 2013-10-15 | 2013-10-15 | Method for manufacturing a moulded fibre packaging and moulded fibre food packaging |
DK13188739.0T DK2862815T3 (en) | 2013-10-15 | 2013-10-15 | Process for producing a shaped fiber packaging and a shaped food packaging |
EP13188739.0A EP2862815B1 (en) | 2013-10-15 | 2013-10-15 | Method for manufacturing a moulded fibre packaging and moulded fibre food packaging |
TR2017/08733T TR201708733T4 (en) | 2013-10-15 | 2013-10-15 | A method for producing a molded fiber package and a molded fiber food package. |
ES13188739.0T ES2624552T3 (en) | 2013-10-15 | 2013-10-15 | Method for manufacturing a molded fiber container and molded fiber food container |
PCT/EP2014/071798 WO2015055544A1 (en) | 2013-10-15 | 2014-10-10 | Packaging unit comprising non-wood lignocellulosic biomass and method for manufacturing such packaging unit |
US15/028,859 US20160257486A1 (en) | 2013-10-15 | 2014-10-10 | Packaging unit comprising non-wood lignocellulosic biomass and method for manufacturing such packaging unit |
DK14783626.6T DK3058137T3 (en) | 2013-10-15 | 2014-10-10 | PACKAGE UNIT INCLUDING NON-WOOD-BASED LIGNOCELLULOSIC BIOMASS AND METHOD OF MANUFACTURE OF SUCH A PACKAGE UNIT |
EP14783626.6A EP3058137B1 (en) | 2013-10-15 | 2014-10-10 | Packaging unit comprising non-wood lignocellulosic biomass and method for manufacturing such packaging unit |
PL14783626T PL3058137T3 (en) | 2013-10-15 | 2014-10-10 | Packaging unit comprising non-wood lignocellulosic biomass and method for manufacturing such packaging unit |
ES14783626T ES2872448T3 (en) | 2013-10-15 | 2014-10-10 | Packaging unit comprising lignocellulosic biomass not originated from wood and manufacturing method of said packaging unit |
HUE14783626A HUE054253T2 (en) | 2013-10-15 | 2014-10-10 | Packaging unit comprising non-wood lignocellulosic biomass and method for manufacturing such packaging unit |
PCT/NL2014/050712 WO2015057061A1 (en) | 2013-10-15 | 2014-10-14 | Method for manufacturing a moulded fibre packaging |
HRP20170606TT HRP20170606T1 (en) | 2013-10-15 | 2017-04-18 | Method for manufacturing a moulded fibre packaging and moulded fibre food packaging |
HRP20210784TT HRP20210784T1 (en) | 2013-10-15 | 2021-05-14 | Packaging unit comprising non-wood lignocellulosic biomass and method for manufacturing such packaging unit |
Applications Claiming Priority (1)
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EP13188739.0A EP2862815B1 (en) | 2013-10-15 | 2013-10-15 | Method for manufacturing a moulded fibre packaging and moulded fibre food packaging |
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EP2862815A1 EP2862815A1 (en) | 2015-04-22 |
EP2862815B1 true EP2862815B1 (en) | 2017-03-22 |
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EP13188739.0A Active EP2862815B1 (en) | 2013-10-15 | 2013-10-15 | Method for manufacturing a moulded fibre packaging and moulded fibre food packaging |
EP14783626.6A Active EP3058137B1 (en) | 2013-10-15 | 2014-10-10 | Packaging unit comprising non-wood lignocellulosic biomass and method for manufacturing such packaging unit |
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EP14783626.6A Active EP3058137B1 (en) | 2013-10-15 | 2014-10-10 | Packaging unit comprising non-wood lignocellulosic biomass and method for manufacturing such packaging unit |
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US (1) | US20160257486A1 (en) |
EP (2) | EP2862815B1 (en) |
DK (2) | DK2862815T3 (en) |
ES (2) | ES2624552T3 (en) |
HR (2) | HRP20170606T1 (en) |
HU (2) | HUE033565T2 (en) |
PL (2) | PL2862815T3 (en) |
TR (1) | TR201708733T4 (en) |
WO (2) | WO2015055544A1 (en) |
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GB2511560B (en) | 2013-03-07 | 2018-11-14 | Mondelez Uk R&D Ltd | Improved Packaging and Method of Forming Packaging |
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CN105856380B (en) * | 2016-04-18 | 2018-02-27 | 重庆晋豪美耐皿制品有限公司 | A kind of technique having using stalk, shell fiber degradable dinner set and container |
WO2018021911A2 (en) * | 2016-07-25 | 2018-02-01 | Huhtamaki Molded Fiber Technology B.V. | Bottle divider from a moulded pulp material with reduced surface roughness, nd method for manufacturing such bottle divider |
NL2017569B1 (en) * | 2016-10-03 | 2018-04-10 | Huhtamaki Molded Fiber Tech Bv | Biodegradable food packaging unit from a moulded pulp material, and method for manufacturing such food packaging unit |
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CH716233A1 (en) * | 2019-05-28 | 2020-11-30 | Ricola Group Ag | Fiber mixture for paper, cardboard or cardboard and processes for their provision. |
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Also Published As
Publication number | Publication date |
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HUE033565T2 (en) | 2017-12-28 |
HRP20210784T1 (en) | 2021-06-25 |
HRP20170606T1 (en) | 2017-09-08 |
PL2862815T3 (en) | 2017-09-29 |
HUE054253T2 (en) | 2021-08-30 |
EP2862815A1 (en) | 2015-04-22 |
DK3058137T3 (en) | 2021-05-10 |
DK2862815T3 (en) | 2017-05-08 |
EP3058137A1 (en) | 2016-08-24 |
ES2872448T3 (en) | 2021-11-02 |
WO2015057061A1 (en) | 2015-04-23 |
EP3058137B1 (en) | 2021-03-31 |
TR201708733T4 (en) | 2018-11-21 |
US20160257486A1 (en) | 2016-09-08 |
WO2015055544A1 (en) | 2015-04-23 |
ES2624552T3 (en) | 2017-07-14 |
PL3058137T3 (en) | 2021-09-27 |
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