EP2576210A1 - Agencement de feuilles avec une plus grande résistance thermique - Google Patents

Agencement de feuilles avec une plus grande résistance thermique

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Publication number
EP2576210A1
EP2576210A1 EP11727654.3A EP11727654A EP2576210A1 EP 2576210 A1 EP2576210 A1 EP 2576210A1 EP 11727654 A EP11727654 A EP 11727654A EP 2576210 A1 EP2576210 A1 EP 2576210A1
Authority
EP
European Patent Office
Prior art keywords
temperature
layer
film
base layer
pla
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP11727654.3A
Other languages
German (de)
English (en)
Inventor
Kurt Stark
Karl Mauser
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.)
Loparex Germany GmbH and Co KG
Original Assignee
Huhtamaki Forchheim Zweigniederlassung der Hutamaki Deutschland GmbH and Co KG
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 Huhtamaki Forchheim Zweigniederlassung der Hutamaki Deutschland GmbH and Co KG filed Critical Huhtamaki Forchheim Zweigniederlassung der Hutamaki Deutschland GmbH and Co KG
Publication of EP2576210A1 publication Critical patent/EP2576210A1/fr
Withdrawn legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B27/00—Layered products comprising a layer of synthetic resin
    • B32B27/06—Layered products comprising a layer of synthetic resin as the main or only constituent of a layer, which is next to another layer of the same or of a different material
    • B32B27/08—Layered products comprising a layer of synthetic resin as the main or only constituent of a layer, which is next to another layer of the same or of a different material of synthetic resin
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B27/00—Layered products comprising a layer of synthetic resin
    • B32B27/28—Layered products comprising a layer of synthetic resin comprising synthetic resins not wholly covered by any one of the sub-groups B32B27/30 - B32B27/42
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B27/00—Layered products comprising a layer of synthetic resin
    • B32B27/30—Layered products comprising a layer of synthetic resin comprising vinyl (co)polymers; comprising acrylic (co)polymers
    • B32B27/306—Layered products comprising a layer of synthetic resin comprising vinyl (co)polymers; comprising acrylic (co)polymers comprising vinyl acetate or vinyl alcohol (co)polymers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B27/00—Layered products comprising a layer of synthetic resin
    • B32B27/32—Layered products comprising a layer of synthetic resin comprising polyolefins
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B27/00—Layered products comprising a layer of synthetic resin
    • B32B27/34—Layered products comprising a layer of synthetic resin comprising polyamides
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B27/00—Layered products comprising a layer of synthetic resin
    • B32B27/36—Layered products comprising a layer of synthetic resin comprising polyesters
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • 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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B9/00—Layered products comprising a layer of a particular substance not covered by groups B32B11/00 - B32B29/00
    • B32B9/02—Layered products comprising a layer of a particular substance not covered by groups B32B11/00 - B32B29/00 comprising animal or vegetable substances, e.g. cork, bamboo, starch
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L3/00—Compositions of starch, amylose or amylopectin or of their derivatives or degradation products
    • C08L3/02—Starch; Degradation products thereof, e.g. dextrin
    • 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
    • B32B2307/30—Properties of the layers or laminate having particular thermal properties
    • B32B2307/306—Resistant to heat
    • 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
    • B32B2307/30—Properties of the layers or laminate having particular thermal properties
    • B32B2307/308—Heat stability
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2307/00—Properties of the layers or laminate
    • B32B2307/40—Properties of the layers or laminate having particular optical properties
    • B32B2307/412—Transparent
    • 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
    • B32B2307/50—Properties of the layers or laminate having particular mechanical properties
    • B32B2307/582—Tearability
    • B32B2307/5825—Tear resistant
    • 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
    • B32B2307/702—Amorphous
    • 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
    • B32B2307/704—Crystalline
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2307/00—Properties of the layers or laminate
    • B32B2307/70—Other properties
    • B32B2307/716—Degradable
    • B32B2307/7163—Biodegradable
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2307/00—Properties of the layers or laminate
    • B32B2307/70—Other properties
    • B32B2307/732—Dimensional properties

Definitions

  • Plastics such as polylactic acid (PLA) or starch are enjoying increasing popularity in the packaging of many packaged goods, such as food. These plastics are compostable one hand, but on the other hand have many advantages of conventional thermoelectric ⁇ plastics based on polyolefins.
  • polylactide PLA polylactide
  • TBS thermoplastic starch
  • thermoplastic starch To be able to process this material, plasticizers are added, the
  • An embodiment of the invention relates to a film assembly having a temperature resistance of at least 70 ° C, comprising
  • At least one PLA or starch-comprising biodegradable base layer having a proportion of at least 50% by weight of the film arrangement, wherein the base layer has a temperature resistance of at most 60 ° C, and
  • At least one first temperature-resistant film layer one of the polymer of the base layer
  • o has a degree of crystallization of at least 10% and a melting point of at least 70 ° C.
  • a base layer based on PLA or starch which has a relatively low temperature resistance of at most 60 ° C, with a first temperature-resistant film layer in the
  • Foil assembly has a temperature resistance that is above the temperature resistance of the biodegradable base layer. Due to the high proportion by weight of the biodegradable base layer of at least 50% by weight, however, there is still sufficient compostability and biodegradability of the entire film arrangement
  • compostable or biodegradable materials mostly based on renewable raw materials, so that these materials can be described as environmentally friendly and sustainable.
  • the first temperature-resistant film layer in this case has a glass transition temperature of at least 70 ° C and thus has a temperature resistance that is higher than that of the biodegradable base layer.
  • the glass transition temperature also known as T g, is the temperature at which amorphous or partially crystalline polymers from a liquid or rubbery state in the hard-elastic or glassy state
  • the measurement of the glass transition temperature can be carried out by various methods, such as differential scanning calorimetry (DSC).
  • DSC differential scanning calorimetry
  • the dynamic differential calorimetry is a thermal method for determining the emitted or absorbed heat quantity of a sample during defined measurement conditions.
  • Such a measuring method is known to the person skilled in the art and is described, for example, in the German industrial standards DIN 53765, DIN 51007 and ASTM E474 or ASTM D3418.
  • the degree of crystallinity of the first temperature-dependent film layer comprising a polymer different from the polymer of the base layer should be at least 10% and the melting point at least 70 ° C.
  • the degree of crystallization of a polymer indicates the proportion of molecular chains in the polymer which are present in crystalline form in contrast to the amorphous form.
  • the degree of crystallization of a polymer also decisively determines the thermal and mechanical properties of a polymer, and with increasing degree of crystallization and the
  • the degree of crystallinity of a polymer is determined, for example, by dynamic differential calorimetry, as in
  • a temperature resistance at a certain temperature in the sense of the present inventive film arrangement is given when a sample of the film assembly of the dimensions of 100 mm in length and 20 mm in width with a residence time of 5 min at the corresponding temperature and at a load of half a kilogram Weight during this period shows a deformation of less than 10% in relation to the initial length.
  • a test arrangement for determining the temperature resistance will be described in more detail below in the embodiments.
  • biodegradable films means films which are prepared in accordance with the process described in the German industrial standard DIN EN 13432
  • a method is used to test the aerobic compostability, which is identical to the ISO 14855: 1999 method.
  • the test duration may not exceed a maximum duration of six months.
  • the film arrangement to be tested must have a degree of degradation of at least 90% or 90% of the maximum value of one in the plateau phase
  • Disintegration test carried out in the context of aerobic composting. This may after a composting of for a maximum of 12 weeks in a> 2 mm sieve fraction not more than 10% of the original dry weight of the
  • polylactide which uses polylactic acid as a polymer in the base layer.
  • Monomers of the polylactide may be D or L-hydroxycarboxylic acids.
  • the preparation of the polylactic acid takes place via catalytic ring opening ⁇ polymerizations of lactide, an annular
  • biodegradable polyhydroxycarboxylic acids which are also food-compatible.
  • the monomers are also food-compatible.
  • Lactic acid molecules come from renewable sources and can be produced by microorganisms via enzymatic or
  • biochemical processes are obtained for example from corn, potatoes or sugar beet.
  • Manufacturer of polylactic acid or PLA is z. B. the company Nature Works®.
  • thermoplastic It is also possible to use so-called thermoplastic
  • Starch for example, from natural strength through
  • thermoplastic starch Addition of plasticizers such as sorbitol and / or glycerol and can be prepared by homogenization in extruders.
  • plasticizers increases the extrudability of the starch and reduces its brittleness, but also lowers the glass transition temperature of the thermoplastic starch and thus reduces its temperature resistance.
  • the Her ⁇ position and properties of thermoplastic starch are described, for example, in the publications EP 0 397 819 B1, WO 91/16375 A1, EP 0 537 657 B1 and EP 0 702 698 B1
  • At least one first adhesion promoter layer is present between the base layer and the temperature-resistant layer
  • Base layer and the first temperature-resistant film layer have such different chemical properties that the adhesive strengths of the two layers are often unsatisfactory.
  • a first adhesion promoter layer is then present, which is between the base layer and the temperature-resistant
  • Film layer is present and requires good adhesion of the first temperature-resistant film layer on the biodegradable base layer.
  • the optional adhesive layer may further comprise a plastic which is grafted with anhydride groups ⁇ , such as polypropylene, ethylene vinyl acetate or ethylene acrylate, each with
  • Layers ⁇ such coupling agents are particularly capable of high composite ⁇ liability of at least 5 to 10 N terephthalate per 15 mm between the different materials of the base layer, such as PLA, and between the first heat-resistant film layer, for example, amorphous polyethylene, PP or PA to enable.
  • the adhesive layer can, depending on their glass transition temperature ⁇ and / or their degree of crystallization and the Melting point also for improving the temperature resistance of Folienanorditch invention
  • the adhesion promoter layer is also biodegradable and more preferably additionally made of renewable raw materials.
  • the base layer is amorphous or the base layer comprises an amorphous PLA or
  • thermoplastic starch-comprising polymer Amorphous in the sense of the present invention are understood to mean polymers or film layers which have a
  • PLA is amorphous under standard processing conditions, for example in an extrusion, by a casting or blowing process, since the process steps for producing films are so fast that the rapid
  • thermoplastic starch is usually amorphous.
  • the base layer may be free from the temperature resistance-increasing additives.
  • additives may be polymeric modifiers, for example Example based on ethylene copolymers containing the
  • additives is usually very expensive and can also lead to a clouding or reduction in transparency.
  • the base layer contains exclusively PLA or copolymers based solely on PLA. Numerous examples are known from the prior art, in which by mixing other plastics,
  • copolymers based on styrene and maleic anhydride increased temperature resistance can be achieved.
  • plastic-based In ⁇ mixtures are with inventive film arrangements not necessary since, as already mentioned above, the increased
  • Temperature stability is caused by the first temperature-resistant film layer.
  • plasticizers may also be present in a further embodiment of the film arrangement according to the invention. This improves the mechanical properties of the film, such as an increase in the elongation at break or higher tear and tear propagation resistance.
  • plasticizers the addition of plasticizers the
  • thermally stable film assembly which remains thermally stable at least up to 70 ° C (and higher).
  • the base layer in a preferred
  • Polyhydroxycarboxylic comprising plastic.
  • the monomers of the PLA base layer may comprise D-lactic acid or else L-lactic acid.
  • the PLA base films of film arrangements according to the invention can have no or only a very small proportion of, for example, less than 10% by weight or preferably less than 5% by weight of so-called stereocomplexes of D-PLA, composed of D-lactic acids and of L-PLA, synthesized from L Having lactic acid monomers.
  • stereo complexes between D-PLA and L-PLA have partly improved material properties, but are very expensive to produce.
  • Increase the stereo complexes of D-PLA and L-PLA often the melting point and the crystalline ⁇ sationsgrad of PLA films, which in turn results in an increased temperature stability.
  • the stereo complexes can be produced for example by tempering of D-PLA and L-PLA-containing films, but this is time-consuming and cost-intensive ⁇ .
  • an increased temperature resistance is attributable to the first temperature-resistant film layer, so that pretreated PLA base films with stereocomplexes of this type need not be used to increase the temperature stability.
  • the base layer PLA for example PLA 2002D from Nature Works®, or starch, for example Mater-BI® CF51B, Mater-BI® NF803A, Mater-BI® NF10A, or Mater-BI® CF99A from Novamont ,
  • the polymer of the temperature-resistant film layer is selected from a group consisting of:
  • PET Polyethylene terephthalate
  • PE polyethylene
  • PP polypropylene
  • PA polyamide
  • PS polystyrene
  • PMMA polymethylmethacrylate
  • PC polycarbonate
  • Such plastics which are produced in part on the basis of crude oil, have excellent temperature stability ⁇ lticianen, and are therefore particularly well suited to the
  • Polyethylene terephthalate can be used for example in the form of so-called amorphous polyethylene terephthalate (A-PET) or as so-called glycol-based PET (G-PET or PET-G). It is also possible to use crystalline modifications of polyethylene terephthalate (such as C-PET).
  • A-PET amorphous polyethylene terephthalate
  • G-PET glycol-based PET
  • C-PET crystalline modifications of polyethylene terephthalate
  • Polyethylene terephthalate usually has
  • Polypropylene has a glass transition temperature of 0 to -10 ° C and is therefore used under standard conditions at 25 ° C in the rubber-elastic range.
  • syndiotactic Polypropylene can have a degree of crystallization of 30 to 40% and isotactic polypropylene a
  • the glass transition temperature may be about 100 ° C, with polystyrene also being amorphous
  • Polystyrene can also be used as a
  • PE-LD polyethylene in the case of soft polyethylene PE-LD has a glass transition temperature of -100 ° C and a degree of crystallization of about 40 to 50% and in the case of hard polyethylene PE-HD one
  • Amorphous polyethylene terephthalate used.
  • Amorphous polyethylene terephthalate is also capable of forming in particularly thin layers, the
  • A-PET can be processed very easily in extruders.
  • Folienanordung is preferably a
  • Base layer used which includes PLA, where PLA may be the only polymer component.
  • the temperature-resistant film layer may also comprise polyhydroxycarboxylic acids other than PLA.
  • the Polyhydroxycarboxylic acid of the base layer may be selected from a group consisting of: poly-3-hydroxybutyrate, poly-3-hydroxyvalerate and poly-4-hydroxybutyrate, polyglycolic acid and any mixtures or copolymers thereof.
  • Poly-3-hydroxybutyrate has indeed only a glass transition temperature of 15 ° C ⁇ has a high crystallization ⁇ degree of over 60% and a melting point of over 170 ° C. Also polyglycolic acid has a relatively low glass transition ⁇ temperature of 35 to 40 ° C, but has a high
  • Foil layer can be realized, so that the degree of
  • the thickness of the base layer is greater than the thickness of the temperature-resistant
  • the biodegradable base layer constitutes at least 60, 70 or even 80% by weight of the film assembly, with the result that the film assembly is predominantly based on biodegradable polymers. Furthermore, it is preferred if the film arrangement
  • a transparent film arrangement in the sense of the present invention is understood to mean a film arrangement which has transmission values of at least 50%, preferably greater than 80%, most preferably greater than 90%.
  • the haze is preferably less than 50%, preferably less than 25%, and most preferably less than 10%.
  • a film arrangement according to the invention has a temperature resistance of at least 75 °.
  • a further increase in the temperature resistance of the film assembly above 70 ° C addition can be achieved that on the one hand, a polymer in the first
  • temperature-resistant film layer which has a temperature resistance of at least 80 ° C or that the thicknesses of the first temperature-resistant film layer is increased compared to the thickness of the base layer.
  • the temperature stability of embodiments of the invention Folienanordung takes in the following series
  • Foil arrangement additionally comprises:
  • Foil layer is arranged.
  • the base layer is thus arranged between two temperature-resistant film layers, the first and second temperature-resistant film layer, to improve the adhesion between the base layer and the respective temperature-resistant film layers, first and second
  • Adhesive layers can be present.
  • the temperature-resistant film layers act particularly well as a kind of "heat shields" and therefore require a particularly good increase in the temperature stability of the entire film arrangement over the temperature stability of the base layer alone.
  • the thickness of the base ⁇ layer is greater than the sum of the thicknesses of the first and second temperature-resistant film layers and the
  • first and second adhesion promoter layers optionally present first and second adhesion promoter layers, so that again the compostability and biodegradability of the entire film assembly is determined primarily by the base layer.
  • this may comprise, in addition to the base layer and the temperature-resistant film layer, a further, second base layer, wherein the temperature-resistant
  • Foil layer between the base layer and the further, second base layer is arranged.
  • Such a film arrangement may further comprise a second adhesion promoter layer which is arranged between the temperature-resistant film layer and the further, second base layer in order to ensure better adhesion between the temperature-resistant film layer and the further, second base layer.
  • the at least two base layers preferably comprise PLA. Furthermore, in the film arrangement, the temperature-resistant film layer may be on both sides of at least two
  • base layers which are present on the same side of the temperature-resistant film layer can be arranged directly above each other without
  • Adhesive layers are arranged therebetween.
  • Embodiments of film assemblies of the invention may contain additives such as antiblock and slip additives which have a significant influence on the coefficient of friction of the film assembly against itself or against other substrates such as steel or glass.
  • a possible slip-antiblock combination is Sukano® PLA DCS 511.
  • the film arrangement can be further refined and, for example, provided with an imprint, or stretched, embossed, siliconized and / or laminated. Furthermore, it is possible that the film assembly by coextrusion, for example by means of the cast or
  • Blowing process can be produced. This can be produced in a particularly simple manner film assemblies containing the base layer, the adhesive layer and one or more temperature-resistant ⁇ film layers. By means of this simple production process, base layers based on
  • Polyhydroxycarboxylic acids such as PLA, are produced, these layers have a high amorphicity
  • FIG. 1 shows a cross section through an embodiment of a film arrangement according to the invention
  • FIG. 2 shows a cross section through a further embodiment of a fiction, modern ⁇ film arrangement with two thermally resistant film layers
  • Figure 3 is a schematic drawing of an experimental arrangement for determining the temperature resistance.
  • FIG. 1 shows in cross section a film assembly 1 with a biodegradable base layer 5 to which a first temperature- ⁇ resistant film layer 10 was applied by means of a first adhesive layer 15 °.
  • the biodegradable Base layer for example, from conventional, in no way modified to increased temperature stability
  • Polylactide PLA for example the polylactide PLA 2002D from Nature Works®. On this base layer is a first
  • Adhesive layer 15 applied, for example
  • the first temperature-resistant film layer is applied, for example, amorphous polyethylene terephthalate ⁇ .
  • FIG 2 shows another embodiment of a film assembly fiction, modern ⁇ , wherein in addition to the arrangement shown in Figure 1 film a second adhesive layer 16 and a second heat-resistant film layer 11 are present.
  • the PLA base layer 5 is particularly well protected against elevated temperatures.
  • the layer thickness of the base layer may be, for example, 10 ⁇ m to 2,000 ⁇ m, preferably 15 mm to 1,500 ⁇ m, most
  • the film layer (s) and optionally the adhesion promoter layer (s) may be, for example, 2 ⁇ m to 2,000 ⁇ m, preferably 5 ⁇ m to 500 ⁇ m, most preferably 10 ⁇ m to 100 ⁇ m.
  • FIG. 3 shows a schematic arrangement for determining the temperature resistance.
  • the sample of the film assembly 1 had a length of 100 mm and a width of 20 mm and consisted of different film assemblies according to the invention, or
  • Weight load had a change of less than 10% compared to the original length.
  • Tables 1 to 5 show the structure and composition of the various film layers of five different embodiments of the invention
  • Embodiment 1 co-extruded cast film with PLA base layer and two temperature-stable
  • Example 2 (coextruded Castfol with PLA base layer and two temperature-stable
  • Embodiment 3 (coextruded cast film) with PLA base layer flanked by two temperature-stable film layers made of PA Layer composition Share in thickness in
  • Embodiment 4 (coextruded cast film) with four PLA base layers flanking a temperature-stable film layer of PP
  • Embodiment 5 (coextruded cast film) with a PLA base layer flanked by two temperature-stable G-PET film layers
  • thermo stabilities of about 74 ° C to 75 ° C.

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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)
  • Laminated Bodies (AREA)

Abstract

L'objet d'un mode de réalisation de la présente invention est un agencement de feuilles (1) présentant une résistance thermique jusqu'à une température d'au moins 70 °C, ledit agencement de feuilles comportant : au moins une couche de base (5) biodégradable, contenant un acide polyhydroxycarboxylique ou de l'amidon et constituant au moins 50 % en poids de l'agencement de feuilles, la couche de base ayant une résistance thermique à une température de 60 °C maximum; et au moins une première couche (10) résistant à la température, qui contient un polymère différent de celui de la couche de base, ladite couche résistant à la température présentant une température de transition vitreuse d'au moins 70 °C, et/ou un degré de cristallisation d'au moins 10 % et un point de fusion d'au moins 70 °C. Un tel agencement de feuilles présente, d'une part, une résistance à la température plus élevée que celle de la couche de base (5) biodégradable, et présente, d'autre part, encore une proportion suffisante de biodégradabilité et d'aptitude au compostage, en raison de la présence de la couche de base.
EP11727654.3A 2010-05-25 2011-05-24 Agencement de feuilles avec une plus grande résistance thermique Withdrawn EP2576210A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102010021453A DE102010021453A1 (de) 2010-05-25 2010-05-25 Folienanordnung mit erhöhter Temperaturbeständigkeit
PCT/EP2011/058483 WO2011147835A1 (fr) 2010-05-25 2011-05-24 Agencement de feuilles avec une plus grande résistance thermique

Publications (1)

Publication Number Publication Date
EP2576210A1 true EP2576210A1 (fr) 2013-04-10

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EP11727654.3A Withdrawn EP2576210A1 (fr) 2010-05-25 2011-05-24 Agencement de feuilles avec une plus grande résistance thermique

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EP (1) EP2576210A1 (fr)
DE (1) DE102010021453A1 (fr)
WO (1) WO2011147835A1 (fr)

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