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WO2024228161A1 - Composition thermoplastique pour emballage biodégradable et compostable destiné à venir en contact avec des aliments - Google Patents

Composition thermoplastique pour emballage biodégradable et compostable destiné à venir en contact avec des aliments Download PDF

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Publication number
WO2024228161A1
WO2024228161A1 PCT/IB2024/054306 IB2024054306W WO2024228161A1 WO 2024228161 A1 WO2024228161 A1 WO 2024228161A1 IB 2024054306 W IB2024054306 W IB 2024054306W WO 2024228161 A1 WO2024228161 A1 WO 2024228161A1
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WO
WIPO (PCT)
Prior art keywords
packaging
thermoplastic
weight percentage
biodegradable
vegetables
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.)
Pending
Application number
PCT/IB2024/054306
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English (en)
Inventor
Nicola De Mattia
Giuseppe DARGENIO
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.)
Rigenera Di Sfrecola Cosimo Damiano
Original Assignee
Rigenera Di Sfrecola Cosimo Damiano
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 Rigenera Di Sfrecola Cosimo Damiano filed Critical Rigenera Di Sfrecola Cosimo Damiano
Priority to AU2024266094A priority Critical patent/AU2024266094A1/en
Publication of WO2024228161A1 publication Critical patent/WO2024228161A1/fr
Anticipated expiration legal-status Critical
Pending legal-status Critical Current

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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
    • B32B27/36—Layered products comprising a layer of synthetic resin comprising polyesters
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L67/00—Compositions of polyesters obtained by reactions forming a carboxylic ester link in the main chain; Compositions of derivatives of such polymers
    • C08L67/04—Polyesters derived from hydroxycarboxylic acids, e.g. lactones

Definitions

  • thermoplastic biodegradable and compostable composition intended to come into contact with food is described.
  • packaging intended to come into contact with food, made of a biodegradable and compostable material, are described.
  • a flexible packaging for example in the form of a film, a bag or a pouch
  • a rigid packaging for example in the form of a so-called clamshell container
  • the packagings described below are intended in particular to the packaging and conservation of fresh fruit and vegetables.
  • Such packagings could also be used for packaging and storing perishable fresh products other than fruit and vegetables, such as fresh floral products.
  • shelf life The length of time that a fruit and vegetable product can be stored without deteriorating, and can therefore remain on sales shelves, is also known as "shelf life".
  • packaging designed to be able to absorb the substances that accelerate the deterioration of fruit and vegetables and / or release substances with a positive impact on their shelf life and / or positively interfere with the packaged product, its atmosphere or the microorganisms present therein is known.
  • Such packaging is also commercially known as “active packaging”.
  • ES 1 220 467 U1 describes a film, which is neither degradable nor compostable, for the packaging of fruit and vegetables, having at least three layers, at least one of which is added with zeolite for absorbing the ethylene that fruits and vegetables release in their the process of maturation.
  • WO 2022/043441 describes, in particular, a film material for food packaging that comprise three layers: a central layer made from a biodegradable polymer, and two barrier layers arranged on both sides, to reduce the oxygen permeability of the film.
  • the two barrier layers are made from a polymer substrate on which SiO x (that is silicon oxide in which the quantity of oxygen is not certainly determined) or AI2O3 (aluminium oxide) or polyvinyl alcohol is arranged.
  • SiO x that is silicon oxide in which the quantity of oxygen is not certainly determined
  • AI2O3 aluminium oxide
  • polyvinyl alcohol polyvinyl alcohol
  • ES 2 939 544 Al describes a film, for packaging fruit and vegetables, having at least three layers, one of which is added with zeolites (having the function of absorbing the ethylene released by fruit or vegetables during their process of maturation) and another layer added with a mixture of zinc oxides and silver ions (to limit the proliferation of bacteria).
  • the various layers of the film can be made from biodegradable polymers.
  • one aim of the inventors is to provide a packaging for fruit and vegetables that is biodegradable and compostable.
  • Another aim of the inventors is to provide a packaging for fruit and vegetables that allows the shelf life of the preserved product to be extended.
  • a further aim of the inventors is to provide a packaging for fruit and vegetables having an adequate transparency.
  • FIG. 1 shows a portion of a film, suitable for packaging and preserving fresh fruit and vegetables
  • FIG. 2 shows a bag obtainable starting from the film in figure 1, suitable for packaging and preserving fresh fruit and vegetables;
  • FIG. 3 shows a clamshell container (made by thermoforming) suitable for containing and preserving fresh fruit and vegetables;
  • FIG. 5a - figures 5a - 5d show some strawberries, after a three day-storage in the refrigerator at 5 °C, when packaged in four different types of bags, as described later;
  • FIG. 5e shows some strawberries after a three day-storage in the refrigerator at 5°C, when packaged in the original packaging, known in the art
  • - figure 6e shows the same strawberries as the sample in figure 5e, after a five day-storage in the refrigerator at 5 °C, when stored in the original packaging
  • - figure 7 shows the same strawberries as the sample in figure 5d, after a ten day-storage in the refrigerator at 5 °C
  • FIG. 8 shows the same strawberries as the sample in figure 5d, after a twelve day-storage in the refrigerator at 5 °C.
  • a packaging in the form of a film is indicated with reference number 1
  • a packaging in the form of a bag or sack (which can be obtained starting from the film 1) is indicated with reference number 2
  • a packaging in the form of a container with a lid of the so-called clamshell type is indicated with reference number 3.
  • the packagings 1, 2, 3 - shown in the attached drawings - are made of a thermoplastic biodegradable and compostable material, intended to come into contact with food, which will be better described later.
  • the film 1, for example, can be used for wrapping fruit and vegetables.
  • the bag 2 for example, can be used for storing fruit and vegetables.
  • the mouth of the bag 2 can be closed after inserting the fruit and vegetables, for example by making a knot, or simply folding the edges on themselves, or by means of heat sealing.
  • the clamshell container 3 for example, can be used for storing fruit and vegetables.
  • the packagings 1, 2, 3 are single-layer packagings, that is to say they are made of a single layer of thermoplastic material.
  • the film 1 can be obtained by using a conventional single-layer blown extrusion plant, fed with a thermoplastic material in the form of biodegradable and compostable pellets, which is intended to come into contact with food.
  • the film can be processed in the form of a bag or a sack, or in the form of a substantially rigid container, for example a clamshell tray.
  • the bag 2 can be obtained by using a conventional plant for producing bags fed with a film material, for example a tubular film (in particular a single -layer tubular film), or a single-fold film (in particular a single-layer single -fold film).
  • a film material for example a tubular film (in particular a single -layer tubular film), or a single-fold film (in particular a single-layer single -fold film).
  • the material in the form of a film used to make the bag 2 is a thermoplastic biodegradable and compostable material, intended to come into contact with food.
  • the clamshell container 3 can be obtained by thermoforming a sheet of a single-layer material, which is in turn obtained by using a conventional flat-head single-layer extrusion plant, fed with a thermoplastic biodegradable and compostable material, in the form of a pellet, intended to come into contact with food.
  • the packagings 1, 2 and 3 are particularly advantageous for preserving products such as fresh fruit and fresh vegetables, significantly extending their shelflife.
  • thermoplastic as used herein, particularly refers to a material that can be shaped under the action of heat and, in particular, a material that can be processed through the so-called blown extrusion or flat die extrusion.
  • biodegradable and compostable means a material that can be transformed - under the action of bacteria and microorganisms and under certain conditions of temperature, humidity and oxygen concentration - into oxygen, carbon dioxide and compost.
  • the characteristic "compostable”, as used herein, means in particular a material whose composition does not give rise to the release of heavy metals.
  • the characteristic "compostable” claimed herein also indicates a material that can be transformed into compost without the presence of ultraviolet rays.
  • biodegradable and compostable material A definition of "biodegradable and compostable” material is set forth in the Italian Technical standard, harmonized at European level, UNI EN 13432:2002 (Requirements for packaging recoverable through composting and biodegradation - Test schemes) and UNI EN 11451:2012 (Compostable and biodegradables bags for urban solid waste collection - Types, requirements and test methods).
  • the composition of the pellets used to extrude the material used to make the packagings 1, 2, 3 comprises: a polyester polymer or a mixture of thermoplastic, biodegradable and compostable polyester polymers; zeolites, in a weight percentage between 0.1% and 60%; and an antibacterial, substantially and / or essentially free of metals or metal-based compounds, such as metal oxides and metal salts.
  • the zeolites present in the polymeric matrix perform, in particular, the function of counteracting the processes evolving during the aging phase, effectively slowing down the ripening of the packaged products.
  • zeolites are present in a weight percentage between 0.1% and 10%, more preferably between 0.1% and 2%.
  • Zeolite percentages greater than 2% by weight lead to a decrease in the transparency of the material used to make the packaging.
  • zeolites can be used, for example, to make rigid, non-transparent containers which can be provided with lids or closure films in a transparent composition.
  • antibacterial is herein intended to indicate a biocidal compound capable of counteracting the proliferation of bacteria and other microorganisms such as yeasts and moulds, which are naturally present on the surface of fruit and vegetables.
  • the antibacterial compound, or biocide is present in a weight percentage of the weight of the thermoplastic composition between 0.02% and 10%, preferably between 0.1% and 1.5%.
  • a preferred biocide is citric acid.
  • Salified forms of citric acid are preferably not used.
  • the combination of zeolites and a biocide makes it possible to extend the ripening times of food by at least 100% compared to traditional packaging and by at least 100% compared to packaging that uses only zeolites or only the biocide.
  • the ripening time that is to say the shelf life of the product in terms of days before it is no longer salable, is extended by up to 4 times, for example from 7 to 28 days for mushrooms, as specified in table 2 described below.
  • the antibacterial being substantially and / or essentially free of metals or metal-based compounds, such as metal oxides and metal salts, means that packagings 1, 2, 3 are suitable for contact with products intended for food consumption, turning out to also be compostable.
  • the antibacterial used to make the packagings 1, 2, 3 is free of zinc oxide (ZnO) which is a compound relatively harmful to human health, the presence of which would also affect the packaging compostability.
  • ZnO zinc oxide
  • a biodegradable and compostable thermoplastic polyester suitable for use in the producing packagings 1, 2, 3 can be a polybutyrate-adipate-teraphthalate (PBAT).
  • PBAT polybutyrate-adipate-teraphthalate
  • PBAT is present with reduced amounts of PLA (polylactic acid, a compostable polyester) to improve the extrudability of PBAT.
  • PLA polylactic acid, a compostable polyester
  • the biodegradable and compostable thermoplastic polyester used to make the packagings 1, 2, 3 may include at least one thermoplastic polyhydroxyalkanoate (PHA).
  • PHA thermoplastic polyhydroxyalkanoate
  • Polyhydroxyalkanoate refers to a family of polymers (polyesters) consisting of (R)-3-hydroxyalkanoic acids synthesized by bacteria through microbial fermentation processes.
  • PHAs can be synthesized as homopolymers (equal monomers) or copolymers (different monomers), depending on the bacterial strains used or growth substrates.
  • PHA polyhydroxybutyrate
  • PHAs are non-toxic, non-water soluble, biodegradable and compostable, and exhibit thermoplastic properties similar to petrochemical plastics.
  • Poly-3 -hydroxybutyrate (PHB) for example is the most widely studied PHA polymer and exhibits highly crystalline characteristics similar to those of polypropylene.
  • short-chain PHA scl-PHA, 3 to 5 carbon atoms
  • medium-chain PHA mcl-PHA, 6 to 15 carbon atoms
  • 1-chain PHA 1-chain PHA
  • the molecular weight of PHA can vary depending on the intended use of the thermoplastic composition and will be lower in case it is intended for moulding while it will be higher if it is intended for extrusion (for example blown extrusion).
  • the PHA used has a molecular weight between 2. 10 4 and 5. 10 6 Daltons. It has been found that the addition of PHB can improve the elasticity and compostability of the finished product, particularly products in the form of a film.
  • the biodegradable and compostable thermoplastic polyester from which the packagings 1, 2, 3 are made may include polybutylene succinate (PBS) or polybutylene succinate adipate (PBSA).
  • PBS polybutylene succinate
  • PBSA polybutylene succinate adipate
  • the molecular weight of PBS can range from 60,000 to 100,000 g/mol.
  • PBS that can be used to extrude the packagings 1, 2, 3
  • Mitsubishi FZ91 which has a degree of fluidity (also called Melt Flow Index or MFI) of 5 g/ 10 min and a melting temperature of 115 °C.
  • PBS polybutylene succinate
  • PBSA polybutylene succinate adipate
  • PBSA appears to be more amorphous and therefore more transparent.
  • a mixture is used which, in addition to one of the polymers discussed above, also comprises a percentage of PLA, or polylatic acid, to improve the workability of the polymer mixture.
  • the antibacterial is made up of, or in any case comprises, citric acid, in particular citric acid in an anhydrous form.
  • citric acid is present in a weight percentage between 0.1% and 1.0% of the total weight of the polymeric composition.
  • the inventors have observed that percentages by weight of citric acid higher than 1% cause an excessive increase in the fluidity of the thermoplastic composition during the extrusion phase, making the material production process difficult.
  • zeolites and citric acid not only do not affect the compostability of the polymeric material but are both suitable for contact with food and skin.
  • zeolites are present in a weight percentage equal to 2% and citric acid is present in a weight percentage equal to 0.7%.
  • the packagings 1, 2, 3 can be a multilayer packaging.
  • the film 1 can comprise a plurality of layers of a thermoplastic biodegradable and compostable material, intended to come into contact with food, each layer of which is added with zeolites and an antibacterial, and substantially or essentially free of metals or metal-based compounds, such as metal oxides and metal salts.
  • the "antibacterial” compound is a biocidal agent compatible with said thermoplastic polymer and selected from: benzoic acid; citric acid; sorbic acid; bacteriocins; essential oils having a biocidal action, preferably selected from tea tree, lavender, thyme, onion, eucalyptus, lemon essential oils; chitosan and ketin; polyphenols; graphene; terpenes; peptides and cinnamaldehydes or mixtures thereof.
  • a preferred compound is citric acid which is in a solid, powder form.
  • Antibacterials in the form of oils or otherwise liquids are generally added to a carrier, such as epoxidized soybean oil which acts as a plasticizer, before being added in a known manner to the polymer in the mixing extruder.
  • At least the layer intended to come into contact with fruit and vegetables is for example loaded with zeolites and an antibacterial.
  • all the layers are preferably added with zeolites and antibacterial.
  • Having more layers can improve can improve the mechanical properties of the film 1 and the bag 2 and the tray 3 in particular the resistance to tearing can increase.
  • PHA, PBS and PBSA all have the advantage of being heat sealable, and are therefore suitable for producing packaging in the form of bags.
  • Zeolites and citric acid have a grain size which is smaller than the thickness of the extruded material.
  • composition of the pellet, and therefore of the packagings 1, 2, 3, can comprise a starch, for example a thermoplastic starch, in a weight percentage which is ⁇ 30%.
  • Adding starch can help to reduce the production costs of the packagings 1, 2, 3, even if this involves a reduction in the transparency of the packaging.
  • composition of the pellet the packagings 1, 2, 3 are made from can comprise a filler dispersing agent, in a weight percentage which is ⁇ 1%, to maintain a uniform distribution of zeolites and the starch inside the extruded product and therefore obtain a material having a homogeneous composition.
  • the product marketed as “4102” by the German company BYK can be used for example as a dispersing agent.
  • the composition of the pellet, and therefore of the packagings 1, 2, 3, can comprise a plasticizer for food use, (for example epoxidized soybean oil, glycerin, water, sorbitol or a mixture thereof) to improve the extrudability and the elongation properties of the finished product.
  • the percentage by weight of the plasticizer in the thermoplastic composition can be between 0 and 15%.
  • the pellet with the composition described above can be obtained by introducing all the ingredients, dosed gravimetrically with dedicated dispensers or injected in a known way in case of liquid ingredients, into a conventional extruder, for example a twin-screw extruder.
  • thermoplastic composition described above, at which the film 1 is made, are affected by the type of machine used and the polymer envisaged in the formula.
  • the extrusion temperatures can be between approximately 150 °C and 180 °C.
  • a thermal melting profile which allows to obtain a temperature of the outgoing melted mass of approximately 20°C above the melt of the compound being processed is generally applied, taking into due consideration the thermolability of the components of the composition.
  • the antibacterial may comprise a mixture of citric acid and thyme oil.
  • thermoplastic composition in addition to citric acid the thermoplastic composition comprises sorbic acid for its biocidal and antifungal properties.
  • the single-layer or multilayer film material 1 has an average thickness between 7 and 20 pm, preferably between approximately 12 and 20 pm, for example approximately 13 pm.
  • Thicknesses which are less than 12 pm can make the film 1 not very resistant.
  • Thicknesses which are greater than 20 pm would instead be economically disadvantageous.
  • the material of the clamshell container 3 has an average thickness in the range between 0.5 mm and 2.5 mm, preferably at least 1 mm.
  • the packagings 1, 2, 3 are packagings with venting holes 4 (in the case of the clamshell container the holes 4 can be located at least on the lid of the container).
  • venting holes 4 give the packagings 1, 2, 3 significant permeability to gases (in particular to oxygen and carbon dioxide) and to water vapour.
  • venting holes 4 allow the atmosphere inside the package to be maintained at values capable of minimizing the anaerobic processes that take away the freshness of the food.
  • the atmosphere inside the space defined by the packagings 1, 2, 3 can be modified by varying the shape, size and number of the venting holes 4.
  • venting holes 4 can vary depending on the type of product contained in the packagings 1, 2, 3 and the quantity of the product packaged in the packagings 1, 2, 3.
  • the venting holes 4 are substantially and / or essentially circular holes having a diameter between 3 and 8 mm, preferably between approximately 4 and 6 mm (that is to say having a section between approximately 12 mm 2 and approximately28 mm 2 ).
  • venting holes 4 can have a diameter of approximately 6 mm.
  • a bag 2 measuring 28x42 cm comprises eight venting holes, four for each face or side of the bag.
  • venting holes 4 The number of the venting holes 4 depends on the size of the bag.
  • the holes discussed above are present in such a number as to provide a ratio between the area in mm 2 of the holes for each cm 2 of the surface of the packaging (mm 2 hole area/ cm 2 surface) between 0.04 mm 2 /cm 2 and 0.4 mm 2 /cm 2 .
  • venting holes 4 of this size and distribution significantly increase the shelf life of the fresh products contained in the bag 2.
  • venting holes 4 allow a more effective drainage of humidity without affecting the effect of the combination of zeolites and the biocidal agent on the ripening times of the product.
  • the above indicated dimensions of the venting holes 4 are deemed to be such that it is unlikely that the humidity created inside the packaging could block the venting holes and accumulate inside the packaging (which problem is highlighted for example by using conventional venting holes having a diameter on the order of 1.5 mm or less).
  • the packagings 1, 2, 3 thus made have adequate mechanical resistance and are free from risks to the health of the consumers of packaged fruit and vegetables.
  • packagings 1, 2, 3 appear to be easily biodegradable and compostable.
  • packagings 1, 2, 3 are substantially and / or essentially transparent and allow a visual examination of the packaged fruit and vegetables.
  • Example 1 Manufacturing of a polymer film according to the invention.
  • zeolites 0.07 kg of citric acid and 0. 1 kg of fdler dispersant are added to 10 kg of a mixture consisting of PBAT and PLA, to improve the distribution of zeolites and acid citric in the polymer mass.
  • the loaded polymer is blown extruded and then transformed into a fdm having a thickness of 13 pm.
  • Example 2 Manufacturing of a transparent polymer film according to the invention.
  • zeolites 0.07 kg of citric acid and 0.1 kg of fdler dispersant are added to 10 kg of PBSA.
  • the loaded polymer is blown extruded and then transformed into a fdm having a thickness of 13 pm.
  • the fdm obtained in example 1 is used to produce bags having dimensions equal to 18x28 cm.
  • the bag comprises 4 holes per side having a diameter of 6 mm.
  • Substantially identical quantities of fresh strawberries are placed, some in the original packaging, others inside a bag according to the invention.
  • the strawberries which are packaged in the bag according to the invention are placed in a first refrigerator with a temperature set at 5°C.
  • the strawberries which are packaged in the original plastic packaging are placed in a second refrigerator, identical to the first one, also with a temperature set at 5°C.
  • the samples are visually inspected and photographed every day in order to check ripening conditions and the onset of early signs of wilting: assessment of wilted fruit means that the condition of the fruit was such that the fruit would not have been salable.
  • Bags measuring 18x28 and including 4 holes per side having a diameter of 6 mm were prepared, bags having the following compositions were prepared to carry out comparative tests: a) only the thermoplastic, biodegradable and compostable polyester material described in example 1, said material being additive-free, in particular without zeolites and citric acid; b) the thermoplastic, biodegradable and compostable material of test a), comprising zeolites in the quantity indicated in example 1 but without citric acid; c) the thermoplastic, biodegradable and compostable material of test a), only comprising citric acid in quantities as in example 1 but without zeolites; d) the biodegradable and compostable thermoplastic material of example 1.
  • Equal quantities of fresh strawberries of the same type purchased on the same day were distributed in bags a)- d) to form samples a) - d).
  • an original package of the strawberries was also kept as sample e); the original packaging comprised a tray and a film, both made from polypropylene.
  • the samples are visually inspected daily to check for ripening conditions and the onset of wilting: assessment of wilted fruit means that the condition of the fruit was such that the fruit would not have been salable.
  • the strawberries packaged in the bag according to the invention have maintained excellent conditions up to the 12 th day, while the strawberries kept in an additive-free bag (test a) were wilted already on the 5 th day and the strawberries of tests b), c) and e) were wilted on the 7 th day.
  • test d that is to say the ripening test in a packaging (a bag) according to the invention, the ripening time is increased from 5 to 12 days for strawberries.
  • strawberries can be stored effectively and are in excellent or good conditions (namely consumable - and salable) for at least nine days longer than a traditional polypropylene packaging as in test e).
  • the same result is obtained for packaging in bags produced with the comparison fdms, test b), zeolites only, or test c), citric acid only, proving the existence of a synergistic effect generated by the presence of zeolites and a biocidal agent.
  • thermoplastic polymer composition of the invention can be in the form of pellets, films or more or less rigid containers closed with a lid or a film.
  • the film can have a sufficient thickness (for example approximately 13 microns) and be used to produce perforated bags for containing vegetables, in particular fruit and vegetables, to be stored.
  • the bags can be purchased by the user and used to contain the products to be stored, which products are purchased separately from the bag.
  • fruit and vegetables to be stored are packaged in a packaging made of the claimed composition, as described above.

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  • Chemical & Material Sciences (AREA)
  • Health & Medical Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Medicinal Chemistry (AREA)
  • Polymers & Plastics (AREA)
  • Organic Chemistry (AREA)
  • Wrappers (AREA)
  • Packging For Living Organisms, Food Or Medicinal Products That Are Sensitive To Environmental Conditiond (AREA)
  • Packages (AREA)
  • Compositions Of Macromolecular Compounds (AREA)
  • Laminated Bodies (AREA)

Abstract

En particulier, l'invention concerne un film biodégradable et compostable pour aliments, ayant une ou plusieurs couches, appropriées pour fabriquer un emballage apte à augmenter la durée de conservation des fruits et légumes.
PCT/IB2024/054306 2023-05-03 2024-05-03 Composition thermoplastique pour emballage biodégradable et compostable destiné à venir en contact avec des aliments Pending WO2024228161A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AU2024266094A AU2024266094A1 (en) 2023-05-03 2024-05-03 Thermoplastic composition for a biodegradable and compostable packaging intended to come into contact with food

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
IT102023000008682 2023-05-03
IT102023000008682A IT202300008682A1 (it) 2023-05-03 2023-05-03 Composizione termoplastica biodegradabile e compostabile

Publications (1)

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WO2024228161A1 true WO2024228161A1 (fr) 2024-11-07

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AU (1) AU2024266094A1 (fr)
IT (1) IT202300008682A1 (fr)
WO (1) WO2024228161A1 (fr)

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20010031299A1 (en) * 2000-03-15 2001-10-18 Roland Full Adsorbent
ES1220467U (es) * 2018-10-11 2018-11-15 Flexográfica Del Mediterráneo, S.L. Lámina plástica absorbedora de etileno
WO2022043441A1 (fr) * 2020-08-26 2022-03-03 Drypac Gmbh Corps d'emballage
ES2939544A1 (es) * 2021-10-21 2023-04-24 Flexografica Del Mediterraneo Sl Lamina plastica absorbedora de etileno y antibacteriana

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20010031299A1 (en) * 2000-03-15 2001-10-18 Roland Full Adsorbent
ES1220467U (es) * 2018-10-11 2018-11-15 Flexográfica Del Mediterráneo, S.L. Lámina plástica absorbedora de etileno
WO2022043441A1 (fr) * 2020-08-26 2022-03-03 Drypac Gmbh Corps d'emballage
ES2939544A1 (es) * 2021-10-21 2023-04-24 Flexografica Del Mediterraneo Sl Lamina plastica absorbedora de etileno y antibacteriana

Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
DATABASE WPI Week 201910, Derwent World Patents Index; AN 2018-A1646A, XP002810455 *
DATABASE WPI Week 2023076, Derwent World Patents Index; AN 2023-536934, XP002810454 *

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AU2024266094A1 (en) 2025-11-13

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