WO2014020243A1 - Auto-adhesif thermofusible pour emballage refermable a proprietes organoleptiques ameliorees - Google Patents
Auto-adhesif thermofusible pour emballage refermable a proprietes organoleptiques ameliorees Download PDFInfo
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- WO2014020243A1 WO2014020243A1 PCT/FR2013/000205 FR2013000205W WO2014020243A1 WO 2014020243 A1 WO2014020243 A1 WO 2014020243A1 FR 2013000205 W FR2013000205 W FR 2013000205W WO 2014020243 A1 WO2014020243 A1 WO 2014020243A1
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J153/00—Adhesives based on block copolymers containing at least one sequence of a polymer obtained by reactions only involving carbon-to-carbon unsaturated bonds; Adhesives based on derivatives of such polymers
- C09J153/02—Vinyl aromatic monomers and conjugated dienes
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
- B29C48/001—Combinations of extrusion moulding with other shaping operations
- B29C48/0011—Combinations of extrusion moulding with other shaping operations combined with compression moulding
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
- B29C48/022—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor characterised by the choice of material
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
- B29C48/03—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor characterised by the shape of the extruded material at extrusion
- B29C48/09—Articles with cross-sections having partially or fully enclosed cavities, e.g. pipes or channels
- B29C48/10—Articles with cross-sections having partially or fully enclosed cavities, e.g. pipes or channels flexible, e.g. blown foils
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
- B29C48/16—Articles comprising two or more components, e.g. co-extruded layers
- B29C48/18—Articles comprising two or more components, e.g. co-extruded layers the components being layers
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
- B29C48/16—Articles comprising two or more components, e.g. co-extruded layers
- B29C48/18—Articles comprising two or more components, e.g. co-extruded layers the components being layers
- B29C48/21—Articles comprising two or more components, e.g. co-extruded layers the components being layers the layers being joined at their surfaces
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29D—PRODUCING PARTICULAR ARTICLES FROM PLASTICS OR FROM SUBSTANCES IN A PLASTIC STATE
- B29D7/00—Producing flat articles, e.g. films or sheets
- B29D7/01—Films or sheets
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- 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
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- 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
- B32B27/18—Layered products comprising a layer of synthetic resin characterised by the use of special additives
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- 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
- B32B27/30—Layered products comprising a layer of synthetic resin comprising vinyl (co)polymers; comprising acrylic (co)polymers
- B32B27/302—Layered products comprising a layer of synthetic resin comprising vinyl (co)polymers; comprising acrylic (co)polymers comprising aromatic vinyl (co)polymers, e.g. styrenic (co)polymers
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B7/00—Layered products characterised by the relation between layers; Layered products characterised by the relative orientation of features between layers, or by the relative values of a measurable parameter between layers, i.e. products comprising layers having different physical, chemical or physicochemical properties; Layered products characterised by the interconnection of layers
- B32B7/04—Interconnection of layers
- B32B7/12—Interconnection of layers using interposed adhesives or interposed materials with bonding properties
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- 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
- B32B9/002—Layered products comprising a layer of a particular substance not covered by groups B32B11/00 - B32B29/00 comprising natural stone or artificial stone
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- 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
- B32B9/04—Layered products comprising a layer of a particular substance not covered by groups B32B11/00 - B32B29/00 comprising such particular substance as the main or only constituent of a layer, which is next to another layer of the same or of a different material
- B32B9/045—Layered products comprising a layer of a particular substance not covered by groups B32B11/00 - B32B29/00 comprising such particular substance 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
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/34—Silicon-containing compounds
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J11/00—Features of adhesives not provided for in group C09J9/00, e.g. additives
- C09J11/02—Non-macromolecular additives
- C09J11/04—Non-macromolecular additives inorganic
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J153/00—Adhesives based on block copolymers containing at least one sequence of a polymer obtained by reactions only involving carbon-to-carbon unsaturated bonds; Adhesives based on derivatives of such polymers
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J193/00—Adhesives based on natural resins; Adhesives based on derivatives thereof
- C09J193/04—Rosin
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
- B29K2025/00—Use of polymers of vinyl-aromatic compounds or derivatives thereof as moulding material
- B29K2025/04—Polymers of styrene
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
- B29K2105/00—Condition, form or state of moulded material or of the material to be shaped
- B29K2105/0097—Glues or adhesives, e.g. hot melts or thermofusible adhesives
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- 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
- B32B2250/00—Layers arrangement
- B32B2250/03—3 layers
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- 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
- B32B2307/724—Permeability to gases, adsorption
- B32B2307/7242—Non-permeable
- B32B2307/7248—Odour barrier
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- 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
- B32B2307/73—Hydrophobic
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- 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
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- 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
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- 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
- B32B2439/70—Food packaging
Definitions
- the present invention relates to a new extrudable hot-melt self-adhesive composition for the manufacture of resealable packaging (or trays). It also relates to a multilayer film which comprises an adhesive layer constituted by said composition, and which has improved organoleptic properties.
- the reclosable trays are used in the food industry and retail for the packaging of foodstuffs, especially fresh products. Such packages are described by US Pat. No. 4,673,601 and patent application EP 1053952.
- the user can manually close the package in a substantially airtight manner and thus ensure, if necessary after refrigeration, the conservation the remaining portion of the product.
- a succession of reopenings and reclosures is also possible.
- These packages generally comprise a container (or receptacle) and a cover-lid, which are fixed to each other hermetically by welding.
- the receptacle more or less deep and relatively rigid, consists of a multilayer sheet (also called complex or composite) having a minimum thickness of 200 ⁇ , generally between 200 and 1000 ⁇ .
- This sheet is thermo formed so as to have a planar base on which the food product rests and a periphery in the form of a flat strip.
- This periphery is bonded by welding to the operculum, which is flexible and plane, which consists of a multilayer film (also referred to as complex or composite) generally between 40 and 150 ⁇ m in thickness, and which is sometimes referred to as the lidding film denomination.
- the lidding film When opening the package, the lidding film is separated manually from the receptacle at the level of the plane band of the perimeter. This operation reveals an adhesive layer at the level of this flat strip, both on the cover strip and on the receptacle strip which were previously in contact.
- These two adhesive layers continuous or discontinuous
- "said girls” result from the breaking of an initial adhesive layer or "mother” or, optionally, its separation (or detachment) of one of the two layers of the multilayer complex film that are adjacent thereto.
- the initial adhesive layer is therefore one of the layers of said multilayer complex film which is itself an element comprised either in the composite sheet which constitutes the receptacle or, optionally, in the lidding film.
- the two adhesive layers girls who are present, after opening the package, on the strips located on the respective periphery of the receptacle and the lid are facing each other.
- a simple manual pressure then makes it possible to obtain the reclosing of the package.
- the adhesive composition which constitutes the mother and daughter adhesive layers is therefore necessarily a pressure-sensitive adhesive (also called self-adhesive or PSA, of the English “Pressure Sensitive Adhesive”).
- PSA self-adhesive
- extrudable self-adhesive compositions described in the aforementioned applications are heat fusible compositions comprising a tackifying resin and a styrenic block copolymer including an elastomeric block. They are solid substances at room temperature that contain neither water nor solvent. Applied in the molten state, they solidify during their cooling, thus forming an adhesive layer which provides the connection between the two thin layers of thermoplastic polymeric material to be assembled, while offering the corresponding packaging the advantageous opening properties and reclosing.
- these self-adhesive hot-melt compositions which are prepared by hot mixing of their ingredients, have the additional advantage of being able to be put into the form of granules (between 1 and 10 mm in size) by means of an extrusion step performed directly hot after the mixing step, for example by means of a twin screw extruder provided with a cutting tool of the extruded product.
- the three-layer film which consists of the hot-melt self-adhesive composition layer and the two thin layers of thermoplastic polymeric material to be assembled, can be conveniently manufactured by coextrusion, for example by feeding a blowing device. of cladding material constituting the 3 layers in the form of granules of size defined above.
- the application WO 01/10966 describes an adhesive composition comprising a polymer and a hydrophobic zeolite having a pore diameter greater than 4 Angstroms, in order to eliminate undesirable odors or aromas.
- this adhesive composition is aqueous-based and is not suitable for hot extrusion manufacturing of the three-layer film mentioned above.
- the object of the present invention is to propose an extrudable hot-melt self-adhesive composition allowing cumulatively:
- thermoplastic materials To bind in a three-layer film 2 thin layers of thermoplastic materials, while offering these two layers opening and closing properties, suitable for the use of said film for the manufacture of a resealable package,
- the invention therefore relates firstly to a hot-melt self-adhesive composition having a flow index (or MFI) ranging from 0.01 to 100 g / 10 minutes and comprising:
- At least one diblock copolymer selected from the group consisting of SI, SBI, SIB, SB, SEB, and SEP, and
- the total styrenic unit content of said mixture a) ranging from 10 to 40% by weight;
- a hydrophobic zeolite c consisting of a hydrated alumino-silicate of an alkaline or alkaline-earth metal whose Si / Al molar ratio is in the range from 5 to 1000;
- the percentages of ingredients a), b) and c) being expressed by weight and relative to the total weight of the self-adhesive composition.
- the hot-melt self-adhesive composition essentially consists of:
- At least one diblock copolymer selected from the group consisting of SI, SBI, SIB, SB, SEB, and SEP, and
- the total styrenic unit content of said mixture a) ranging from 10 to 40% by weight;
- tackifying resins b) having a softening temperature of between 5 and 140 ° C .; and from 0.1 to 5% of a hydrophobic zeolite c) consisting of a hydrated alumino-silicate of an alkali or alkaline-earth metal whose Si / Al molar ratio is in the range from 5 to 1000;
- the percentages of ingredients a), b) and c) being expressed by weight and relative to the total weight of the self-adhesive composition.
- the flow index (or Melt Flow Index MFI) is measured at 190 ° C and for a total weight of 2.16 kg, in accordance with condition d) of ISO 1133.
- the MFI is the mass of composition ( previously placed in a vertical cylinder) which flows in 10 minutes through a die of fixed diameter, under the effect of a pressure exerted by a loaded piston having a total weight of 2.16 kg. In the absence of mention to the contrary, the MFI values given in this text have been measured under the same conditions.
- Self-adhesive heat-fusible compositions having an MFI ranging from 2 to 70 g / 10 minutes are more particularly preferred.
- the water content of the hot-melt self-adhesive composition according to the invention is less than 1%, preferably 0.5% and even more preferentially less than 0.1%.
- the styrenic block copolymers included in mixture a) consist of different polymerized monomers, including at least one polystyrene block, and are prepared by radical polymerization techniques.
- the triblock copolymers include 2 polystyrene blocks and an elastomeric block. They can take various structures: linear, star (also called radial), connected or comb.
- the diblock copolymers include 1 polystyrene block and 1 elastomeric block.
- the styrenic block copolymers that may be used in the self-adhesive composition according to the invention have a weight average molecular weight Mw generally of between 50 kDa and 500 kDa and consist of blocks of different polymerized monomers.
- Mw weight average molecular weight
- the weight average molar masses M w given in this text are expressed in dalton (Da) and are determined by Gel Permeation Chromatography, the column being calibrated with polystyrene standards. .
- the tri-block copolymers have the general formula:
- A represents a non-elastomeric styrene block (or polystyrene), and B represents an elastomeric block that can be:
- the block copolymer then has the structure:
- polystyrene-polyisoprene-polystyrene and for designation: SIS;
- polystyrene-polyisoprene-polybutadiene-polystyrene and for denomination: SIBS
- the block copolymer then has the structure:
- polystyrene-polybutadiene-polystyrene and for designation: SBS;
- the block copolymer then has the structure: polystyrene-poly (ethylenebutylene) -polystyrene and for denomination: SEBS;
- the block copolymer then has the structure: polystyrene-poly (ethylenepropylene) -polystyrene and for denomination: SEPS.
- the di-block copolymers have the general formula:
- the mixture a) included in the self-adhesive composition comprises several tribloc styrenic copolymers, the latter being chosen from the group comprising SIS, SBS, SEPS, SIBS, SEBS, it is understood that said triblocks can belong to one or more of these 5 families of copolymers. It is the same, mutatis mutandis, for the diblock copolymers.
- the content of diblock copolymer in mixture a) can range from 50 to 90%, preferably from 50 to 80%, and even more
- a) is a mixture of a triblock copolymer SIS and a diblock copolymer SI.
- the total styrenic unit content of the mixture a) preferably varies from 15 to 20%.
- a) is a mixture of an SBS triblock copolymer and of a diblock copolymer SB.
- the total styrenic unit content of the mixture a) advantageously varies from 20 to 35%.
- the triblock copolymers included in the self-adhesive composition preferably have a linear structure.
- Styrenic block copolymers with an elastomeric block, in particular of the SI and SIS type, that can be used in the mixture a) are commercially available, often in the form of triblock / diblock mixtures.
- Kraton ® Dl 113BT from Kraton and Quintac ® 3520 from Zeon Chemicals are examples of mixtures of a) SIS and SI.
- Kraton ® Dl 113BT is a mixture whose total content of styrene units is 16%, and consisting of 45% linear SIS triblock copolymer M w about 250 kDa, and 55% diblock SI M w about 100 kDa.
- Quintac ® 3520 is a mixture of 22% and 78% triblock SIS (M w about 300 kDa) and diblock SI (M w about 130 kDa), respectively, and the total content of styrenic units is 15%.
- the tackifying resins or resins used in the self-adhesive composition according to the invention have average molar masses by weight M w generally between 300 and 5000 Da and are chosen in particular from:
- rosins of natural origin or modified such as for example rosin extracted from pine gum, wood rosin extracted from the roots of the tree and their hydrogenated, dehydrogenated, dimerized derivatives; polymerized or esterified with monoalcohols or polyols such as glycerol;
- terpene hydrocarbons such as mono-terpene (or pinene) in the presence of Friedel-Crafts catalysts, optionally modified by the action of phenols;
- copolymers based on natural terpenes for example styrene / terpene, alpha-methyl styrene / terpene and vinyl toluene / terpene.
- the temperature (or point) of softening of the tackifying resins used in the composition according to the invention may vary from 5 to 140 ° C.
- the softening temperature is determined in accordance with the ASTM E 28 standard test, the principle of which is as follows. A brass ring about 2 cm in diameter is filled with the resin to be tested in the molten state. After cooling to room temperature, the ring and the solid resin are placed
- aliphatic tackifying resins are used, and even more preferentially aliphatic resins belonging to categories (ii) or (iii) for which examples of commercially available resin may be mentioned:
- Escorez ® 1310 LC available from Exxon Chemicals which is a resin obtained by polymerizing a mixture of unsaturated aliphatic hydrocarbons having about 5 carbon atoms, and which has a temperature of 94 ° C and a softening Mw of about 1800 Da;
- Escorez ® 5400 also from the company Exxon Chemicals which is a resin obtained by polymerization and hydrogenation of a mixture of unsaturated aliphatic hydrocarbons having about 9 or 10 carbon atoms and which has a softening temperature of 100 ° C and a Mw of about 570 Da;
- Zeolites are microporous minerals of natural or synthetic origin which consist of hydrated alumino-silicates of alkali or alkaline earth metals, and which are commonly used as adsorbents or for the purpose of separating mixtures of chemical compounds as molecular sieve.
- zeolites are complex crystalline inorganic polymers, based on an indefinite and three-dimensional sequence of quadrelated structures of tetrahedral A10 4 and S104, linked together by an oxygen (oxide) ion exchange.
- Each tetrahedral AIO4 present in the structure provides a strong negative charge which is counterbalanced by one or more cations of an alkali or alkaline earth metal, for example Na + , Ca 2+ , Mg 2+ or K + . It is these sequences of tetrahedra that generate the channels and cavities constituting the micropores present in the zeolite, specifically to each zeolite structure.
- micropores have a precise and uniform size, which varies according to the structure of the zeolite between 3 and 13 ⁇ , which allows molecules of appropriate size and shape, and generally small enough, to penetrate selectively inside. said pores to be retained by adsorption on their inner wall.
- the presence in the self-adhesive composition according to the invention of the hydrophobic zeolite c) having an Si / Al molar ratio of between 5 and 1000 allows a significant reduction in the taste alteration of a placed food. in contact with said composition, impact which can be conjectured that it is related to the presence in said composition of traces of volatile organic compounds of low molecular weight, for example less than 1000 Da.
- the incorporation into the self-adhesive composition of the hydrophobic zeolite c) advantageously retains the opening and closing properties of the corresponding three-layer film, thus making the latter suitable for use. for the manufacture of resealable packaging.
- the Si / Al molar ratio of zeolite c) is advantageously between 5 and 500, preferably between 5 and 100, more preferably between 5 and 20, and even more preferably between 5 and 15.
- the zeolite c) consists of a hydrated alumino-silicate of sodium.
- the zeolite c) advantageously has an average pore diameter of between 5 and 10 ⁇ and is in the form of a powder of solid particles, whose median diameter is close to 4 ⁇ .
- the hot-melt self-adhesive composition according to the invention comprises:
- the adhesive composition may also comprise from 0.1 to 2% of one or more stabilizers (or antioxidant). These compounds are introduced to protect the composition from degradation resulting from a reaction with oxygen which is likely to be formed by the action of heat, light or residual catalysts on certain raw materials such as tackifying resins . These compounds may include primary antioxidants that scavenge free radicals and are generally substituted phenols like Irganox ® 1010 from BASF. The primary antioxidants can be used alone or in combination with other antioxidants such as phosphites such as Irgafos ® 168 also BASF, or with UV stabilizers such as amines.
- stabilizers or antioxidant
- the self-adhesive composition may also comprise a plasticizer, but in an amount not exceeding 5%.
- a plasticizer a paraffinic and naphthenic oil (Primol ® 352 from ExxonMobil) optionally comprising aromatic compounds (such as Nyflex 222B).
- the adhesive composition may finally comprise inorganic or organic fillers, pigments or dyes.
- the adhesive composition according to the invention is preferably in the form of granules of size between 1 and 10 mm, preferably between 2 and 5 mm.
- the adhesive composition may be prepared, in this form of granules, by a process comprising:
- a cooling step for example at ambient temperature.
- the subject of the present invention is secondly a multilayer film comprising two thin layers of thermoplastic material bonded together by a continuous layer, characterized in that said layer has a thickness of between 7 and 300 ⁇ and is constituted by the hot-melt self-adhesive composition as defined above.
- the thickness of the binder adhesive layer is between 10 and 300 ⁇ , preferably between 10 and 50 ⁇ , and even more
- Said adhesive layer allows the bonding between a complexable thin layer and a sealable and breakable thin layer.
- the complexable layer may be complexed (or laminated) with other layers for producing the package, for example with a rigid layer for producing the receptacle.
- the sealable and breakable layer ensures, at the periphery along which the receptacle is bonded by welding to the lid, the first opening of the package, by means of a breakable weakened zone. After opening, the weakened zone reveals:
- the material that can be used to form the two thin layers bonded together by the binder adhesive layer is generally a thermoplastic polymer (identical or different for the two layers) such that:
- PE polyethylene
- PA polyamide
- PET polyethylene terephthalate
- an ethylene-based copolymer for example a maleic anhydride graft copolymer, a copolymer of ethylene and vinyl acetate (EVA), a copolymer of ethylene and of vinyl alcohol (EVOH), a copolymer of ethylene and an alkyl acrylate such as methyl acrylate (EMA) or butyl acrylate (EBA),
- EVA ethylene-based copolymer
- EVA ethylene and vinyl acetate
- EVOH vinyl alcohol
- EMA methyl acrylate
- EBA butyl acrylate
- PS polystyrene
- PVDF polyvinylidene fluoride
- the multilayer film according to the invention is a three-layer film constituted by the adhesive layer and the two adjacent layers.
- the multilayer film according to the invention comprises, in addition to the two thin layers adjacent to the adhesive layer, other thin layers necessary for producing the package, for example:
- a barrier layer against oxygen, water vapor or carbon monoxide a barrier layer against oxygen, water vapor or carbon monoxide.
- the materials used to form said layers may be identical or different and generally comprise thermoplastic polymers which may be chosen from the polymers mentioned above for the two adjacent thin layers.
- the thickness of the two thin layers adjacent to the adhesive layer and the other layers used in the multilayer film according to the invention can vary in a wide range from 5 to 150 ⁇ .
- the multilayer film according to the invention can be manufactured by depositing a suitable amount of composition according to the invention on one of the two thin layers of material, and application of the 2 nd and hot pressing thin layer. It can also be manufactured by coextrusion.
- the present invention also relates to a method of manufacturing the multilayer film as defined above, characterized in that it comprises the co-extrusion of the hot-melt self-adhesive composition with the materials of the two adjacent thin layers.
- the hot-melt self-adhesive composition and the materials constituting the two thin layers are fed into the coextrusion device in the form of granules of size between 1 and 10 mm, preferably between 2 and 5 mm.
- the self-adhesive composition implemented in the multilayer film according to the invention allows, in a particularly advantageous manner, to ensure both the properties required for said film and the possibility of a presentation of said composition in the form of granules. supra.
- the other layers possibly included in the multilayer film may be obtained either by incorporating into the co-extrusion device the corresponding constituent materials in the form of granules of the same size, or by a process of laminating the film directly from the co-extrusion material. -extrusion.
- the sheath-blown coextrusion process is more particularly preferred, in particular for the manufacture of a multilayer film in which the thickness of the adhesive layer is between 7 and 50 ⁇ , preferably between 10 and 50 ⁇ , and even more preferentially between 10 and 30 ⁇ .
- the present invention also relates to the use of the multilayer film as described above for the manufacture of resealable trays, preferably for the manufacture of the lidding film.
- the adhesive composition indicated in the following table is prepared in the form of a viscous liquid, by simple mixing of the ingredients at 160 ° C by means of a 2-screw extruder.
- the measured MFI is 57 g / 10 minutes.
- a pressure of 100 kg / cm 2 is exerted for 2 minutes by means of a hydraulic press.
- the thickness of the layer consisting of the adhesive composition in the three-layer film obtained is controlled at sliding caliper, and is found to be equal to about 250 ⁇ .
- This test is carried out on a 125 g butter plate with dimensions 110 x 65 x 17 mm. This wafer is centered horizontally on the adhesive layer of a first bilayer which is obtained by peeling off, in the trilayer film prepared previously, the PET film whose inner face, in contact with the adhesive layer, is silicone.
- the upper face of the wafer is then covered with a second bilayer identical to the first, and brought into contact with its adhesive layer.
- the structure thus obtained is overwrapped in aluminum foil and then placed for 10 days in a refrigerator maintained at 10 ° C.
- the 2 platelets of butter are recovered, each cut into 20 pieces of about 6 g and sent to a panel of 10 people for taste assessment.
- Each member of the panel attributes, after tasting, a score of 0 to 4 to the pieces from the wafer placed in contact with the adhesive composition, with respect to the pieces from the control wafer, according to the following scale:
- the average score obtained is shown in the table.
- the scoring by the members of the panel is performed after cutting into the chocolate bar of 20 squares, by tasting the squares from the tablet placed in contact with the adhesive composition, compared to the squares from the control tablet, according to the same scale.
- the resulting film is cut into a 1 cm by 10 cm rectangular test specimen on which the 180 ° peel test is carried out. For this, one takes off from one of the 2 ends of this test piece, and about 2 cm, the 2 PET film layers included in this strip and the two free ends obtained are fixed on two attachment devices (called jaws) connected respectively to a stationary portion and a movable portion of a traction apparatus which are located on a vertical axis.
- jaws two attachment devices
- a force sensor connected to said movable portion measures the force supported by the test piece thus maintained.
- the assembly consisting of ⁇ test piece, the fixed jaw and the movable jaw to which it is attached, is placed in a thermostatic chamber maintained at a temperature of 5 ° C, so that the delamination is carried out after stabilization at this temperature.
- the two PET layers of the preceding test piece are, after their separation, repositioned facing each other and brought into contact manually. They are then subjected to a pressure exerted by means of a 2 kg mass roll with which a round-trip movement is carried out in a direction parallel to the length of the test piece.
- Example A The hot melt self-adhesive composition of Example A is reproduced by adding to its ingredients the Abscents 2000 zeolite, the contents of ingredients being indicated in the table. The same MFI value and the same results are obtained for first and second peel forces at 5 ° C.
- compositions of Examples 1 and 2 are respectively reproduced by replacing the
- Abscents zeolite 2000 by zeolite Abscents 3000 which is a hydrophobic zeolite available from the UOP company, whose Si / Al molar ratio is greater than 2000.
- compositions of Examples 1 and 2 are respectively reproduced by replacing the
- zeolite Abscents 2000 by the zeolite Siliporite G5PTC which is a hydrophilic zeolite available from Arkema.
- compositions of Examples 1 and 2 are respectively reproduced by replacing the
Abstract
Description
Claims
Priority Applications (5)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
AU2013298436A AU2013298436B2 (en) | 2012-07-30 | 2013-07-25 | Hot-melt pressure-sensitive adhesive for a reclosable packaging having improved organoleptic properties |
KR20157005216A KR20150038484A (ko) | 2012-07-30 | 2013-07-25 | 개선된 관능적 특성을 갖는 재밀폐성 포장을 위한 핫-멜트 압력-감지 접착제 |
EP13759550.0A EP2880115B1 (fr) | 2012-07-30 | 2013-07-25 | Auto-adhesif thermofusible pour emballage refermable a proprietes organoleptiques ameliorees |
US14/418,510 US20150299535A1 (en) | 2012-07-30 | 2013-07-25 | Hot-melt pressure-sensitive adhesive for a reclosable packaging having improved organoleptic properties |
JP2015524819A JP6338580B2 (ja) | 2012-07-30 | 2013-07-25 | 感覚刺激性が改良された再密封性包装材料用ホットメルト感圧接着剤 |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR1257353A FR2993897B1 (fr) | 2012-07-30 | 2012-07-30 | Auto-adhesif thermofusible pour emballage refermable a proprietes organoleptiques ameliorees |
FR1257353 | 2012-07-30 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2014020243A1 true WO2014020243A1 (fr) | 2014-02-06 |
Family
ID=47003083
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/FR2013/000205 WO2014020243A1 (fr) | 2012-07-30 | 2013-07-25 | Auto-adhesif thermofusible pour emballage refermable a proprietes organoleptiques ameliorees |
Country Status (7)
Country | Link |
---|---|
US (1) | US20150299535A1 (fr) |
EP (1) | EP2880115B1 (fr) |
JP (1) | JP6338580B2 (fr) |
KR (1) | KR20150038484A (fr) |
AU (1) | AU2013298436B2 (fr) |
FR (1) | FR2993897B1 (fr) |
WO (1) | WO2014020243A1 (fr) |
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EP2946920A1 (fr) | 2014-05-22 | 2015-11-25 | Bostik Sa | Film multicouche pour emballage refermable à refermeture améliorée |
EP2966140A1 (fr) | 2014-07-08 | 2016-01-13 | Bostik Sa | Auto-adhésifs thermofusibles extrudables pour emballage refermable à propriétés organoleptiques améliorées |
EP3144361A1 (fr) * | 2015-09-18 | 2017-03-22 | Nitto Europe N.V | Composition d'adhésif et ruban adhésif à faible fluage |
WO2019121115A1 (fr) | 2017-12-19 | 2019-06-27 | Bostik Sa | Film multicouche incluant un tensioactif non ionique et son utilisation pour un emballage refermable |
WO2019121119A1 (fr) | 2017-12-19 | 2019-06-27 | Bostik Sa | Film multicouche incluant un polymere fluore et son utilisation pour un emballage refermable |
CN110229630A (zh) * | 2019-06-17 | 2019-09-13 | 湖北慧狮塑业股份有限公司 | 一种用于薄板及片材的耐温自粘保护膜 |
WO2020094945A1 (fr) | 2018-11-08 | 2020-05-14 | Bostik Sa | Nouveau film multicouche pour emballage refermable a refermeture amelioree |
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JP6859699B2 (ja) * | 2016-09-29 | 2021-04-14 | 大日本印刷株式会社 | 再封性シーラントフィルム |
JP6985395B2 (ja) | 2017-08-10 | 2021-12-22 | 旭化成株式会社 | 感圧型接着剤用組成物、感圧型接着剤用材料、感圧型接着剤の形成方法、感圧型接着剤、多層フィルム及び包装体 |
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US11578195B2 (en) * | 2018-03-30 | 2023-02-14 | Dai Nippon Printing Co., Ltd. | Odor-adsorbing molded article resin composition, odor-adsorbing molded article, and packaging material |
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JP7178855B2 (ja) * | 2018-09-28 | 2022-11-28 | スタープラスチック工業株式会社 | 包装体用フィルム及び包装体 |
CN110746913B (zh) * | 2019-10-24 | 2021-07-02 | 嘉好(太仓)新材料股份有限公司 | 一种用于足贴底托的专用热熔压敏胶及其制备方法 |
CN117813333A (zh) * | 2021-08-20 | 2024-04-02 | 陶氏环球技术有限责任公司 | 高生坯强度反应性热熔粘合剂 |
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- 2013-07-25 EP EP13759550.0A patent/EP2880115B1/fr not_active Not-in-force
- 2013-07-25 WO PCT/FR2013/000205 patent/WO2014020243A1/fr active Application Filing
- 2013-07-25 JP JP2015524819A patent/JP6338580B2/ja not_active Expired - Fee Related
- 2013-07-25 US US14/418,510 patent/US20150299535A1/en not_active Abandoned
- 2013-07-25 KR KR20157005216A patent/KR20150038484A/ko not_active Application Discontinuation
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EP2133444A1 (fr) * | 2008-04-18 | 2009-12-16 | Applied Materials, Inc. | Support de masque, ensemble de masque, et ensemble comportant un support de masque et un masque |
FR2965213A1 (fr) * | 2010-09-27 | 2012-03-30 | Bostik Sa | Film tricouche pour emballage refermable |
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Cited By (16)
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EP2946920A1 (fr) | 2014-05-22 | 2015-11-25 | Bostik Sa | Film multicouche pour emballage refermable à refermeture améliorée |
AU2015203789B2 (en) * | 2014-07-08 | 2018-12-13 | Bostik Sa | Extrudable hot-melt pressure-sensitive adhesives for resealable packaging having improved organoleptic properties |
US10787595B2 (en) * | 2014-07-08 | 2020-09-29 | Bostik Sa | Extrudable hot-melt pressure-sensitive adhesives for resealable packaging having improved organoleptic properties |
KR20160006121A (ko) * | 2014-07-08 | 2016-01-18 | 보스틱 소시에떼 아노님 | 개선된 관능적 특성들을 갖는 재밀봉성 포장을 위한 압출성 핫-멜트 감압 접착제들 |
JP2016017180A (ja) * | 2014-07-08 | 2016-02-01 | ボスティク エス.アー. | 感覚刺激性が改良された再密封包装用の押出可能なホットメルト感圧接着剤 |
US20160009965A1 (en) * | 2014-07-08 | 2016-01-14 | Bostik Sa | Extrudable hot-melt pressure-sensitive adhesives for resealable packaging having improved organoleptic properties |
EP2966140A1 (fr) | 2014-07-08 | 2016-01-13 | Bostik Sa | Auto-adhésifs thermofusibles extrudables pour emballage refermable à propriétés organoleptiques améliorées |
EP2966140B1 (fr) | 2014-07-08 | 2017-05-10 | Bostik Sa | Auto-adhésifs thermofusibles extrudables pour emballage refermable à propriétés organoleptiques améliorées |
KR102432172B1 (ko) * | 2014-07-08 | 2022-08-11 | 보스틱 소시에떼 아노님 | 개선된 관능적 특성들을 갖는 재밀봉성 포장을 위한 압출성 핫-멜트 감압 접착제들 |
EP3144361A1 (fr) * | 2015-09-18 | 2017-03-22 | Nitto Europe N.V | Composition d'adhésif et ruban adhésif à faible fluage |
WO2017045765A1 (fr) | 2015-09-18 | 2017-03-23 | Nitto Europe N.V. | Composition adhésive et ruban adhésif à faible fluage |
WO2019121115A1 (fr) | 2017-12-19 | 2019-06-27 | Bostik Sa | Film multicouche incluant un tensioactif non ionique et son utilisation pour un emballage refermable |
WO2019121119A1 (fr) | 2017-12-19 | 2019-06-27 | Bostik Sa | Film multicouche incluant un polymere fluore et son utilisation pour un emballage refermable |
WO2020094945A1 (fr) | 2018-11-08 | 2020-05-14 | Bostik Sa | Nouveau film multicouche pour emballage refermable a refermeture amelioree |
FR3088239A1 (fr) | 2018-11-08 | 2020-05-15 | Bostik Sa | Nouveau film multicouche pour emballage refermable à refermeture améliorée |
CN110229630A (zh) * | 2019-06-17 | 2019-09-13 | 湖北慧狮塑业股份有限公司 | 一种用于薄板及片材的耐温自粘保护膜 |
Also Published As
Publication number | Publication date |
---|---|
EP2880115A1 (fr) | 2015-06-10 |
EP2880115B1 (fr) | 2017-06-21 |
AU2013298436B2 (en) | 2016-11-03 |
FR2993897B1 (fr) | 2015-08-21 |
AU2013298436A1 (en) | 2015-02-26 |
KR20150038484A (ko) | 2015-04-08 |
JP6338580B2 (ja) | 2018-06-06 |
US20150299535A1 (en) | 2015-10-22 |
JP2015529715A (ja) | 2015-10-08 |
FR2993897A1 (fr) | 2014-01-31 |
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