DE102009016375A1 - Mono/multilayer film, useful to prepare e.g. packaging element, comprises a sealant layer based on a thermoplastic olefin homo/copolymer containing an antifogging-additive combination from an alkoxylated amine and a polyol-fatty acid ester - Google Patents

Abstract

Monolayer or multilayer film (A) comprises a sealant layer based on at least a thermoplastic olefin homo or copolymer containing an antifogging-additive combination from at least an alkoxylated amine and at least a polyol-fatty acid ester.

Description

The The present invention relates to a single-layer or multi-layered one Film with permanent anti-fog effect comprising a sealing layer (a) based on at least one thermoplastic olefin homo- or copolymers containing an antifogging additive combination at least one alkoxylated amine and at least one polyol fatty acid ester as well as packaging made from this film.

Lots Packaged goods such as food contain a relative high level of moisture, especially water, causing it during storage to a release of a certain amount to get moisture inside the packaging of such foods can. Due to temperature fluctuations affecting the packaged food For example, be exposed during transport, can be a water condensation occur on the inner surface of the package, causing a droplet and / or mist formation over the entire inner surface of the packaging results. is the packaging is transparent, this is due to this droplet and / or mist formation both the visibility of the packaged goods clearly limited as well as the appearance of the packaged food significantly reduced since the buyer no longer gives the impression of freshness.

Films are already known from the prior art, which have an anti-fog effect by the use of anti-fog additives. So will in WO 01/89830 A1 describes a multilayer film containing a polyolefin layer coated with glycerol monostearate as an antifogging additive.

The Use of such Glycerinfettsäurester as anti-fog additives However, often has the disadvantage that after a long time Storage time forms a coating on the surface of the films. This effect is also known as "blooming" and is due to the migration of certain additives, in particular the Glycerides, caused to the surface of the slides.

By the formation of such a surface by blooming becomes the one Appearance of the films impaired, thereby reducing the appearance the freshness of the packaged food is greatly reduced and also the visibility on the packaged goods is significantly reduced. On the other hand, however, with the migration of the anti-fog additive the surface of the film also reduces its antifogging effect, so that this effect is not permanent.

It However, there is a need for multilayer films that have a lasting Anti-fog effect and no blooming. In particular exists a need for packaging from such multilayer films, the packaging goods like moisturizing foods contain and not permanently fogged.

task Therefore, it was the object of the present invention to provide a film to provide, which has a lasting antifogging effect and to no blooming effect, especially as packaging material for Moisture-emitting goods.

These The object is achieved by the provision of the invention single-layered or multi-layered film with permanent antifogging effect comprising a sealing layer (a) based on at least one thermoplastic olefin homo- or copolymers containing a Antifog additive combination of at least one alkoxylated amine and at least one polyol fatty acid ester.

These The object is further achieved by the provision of a Packaging of such a single-layer or multi-layered Foil with permanent antifogging effect.

Under the term "permanent antifogging effect" in the sense of this invention a consistently strong antifogging effect the film according to the invention via a Period of at least three months understood.

to Preparation of the sealing layer (a) (layer (a)) are thermoplastic Olefin homo- or copolymers.

Preferably, these are thermoplastic olefin homo- or copolymers of α, β-unsaturated olefins having 2-6 carbon atoms such as. As polyethylene (PE, especially LDPE or HDPE), polypropylene (PP), polybutylene (PB), polyisobutylene (PI) or mixtures of at least two of said polymers. By "LDPE" is meant low density polyethylene, which has a density in the range of 0.86-0.93 g / cm ³ and is characterized by a high degree of branching of the molecules. With "HDPE" becomes Polyethy denoted high density, which has only a small branching of the molecular chain, wherein the density is in the range between 0.94 and 0.97 g / cm ³ .

Especially For the production of the sealing layer (a) it is preferably suitable at least a polypropylene or a polyethylene homo- or copolymer, whole particularly preferably at least one polypropylene homo- or copolymer made of PP and PE.

The sealing layer (a) of the film according to the invention preferably contains, as one component of the antifogging-additive combination, at least one alkoxylated amine of the general formula (I) R ¹ -N [(C _m H _2m ) -OH] [(C _n H _2n ) -X] (I), wherein,
R ^{1 is} C _7-30 alkyl, C (= O) C _7-30 alkyl, C _7-30 alkenyl, or -C (= O) C _7-30 alkenyl;
n and m are each independently 1, 2, 3, 4, 5, 6, 7 or 8, preferably 2, 3, 4 or 5, most preferably 2;
X is H or OH.

The term "alkyl" or "C _7-30 alkyl" for the purposes of this invention comprises C _7-30 alkany, ie acyclic saturated aliphatic hydrocarbon radicals which may be branched or unbranched, with 7 to 30 carbon atoms, ie with 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29 or 30 C atoms , Preferably, alkyl is selected from the group consisting of n-heptyl, n-octyl, n-nonyl, n-decyl, undecyl, dodecyl, tridecyl, tetradecyl, pentadecyl, hexadecyl, heptadecyl, octadecyl, nonadecyl, eicosyl, henicosyl, docosyl, tricosyl , Tetracosyl, pentacosyl, hexacosyl, heptacosyl, octacosyl, nonacosyl and triacontyl. A particularly preferred C _7-30 -alkyl is a C _11-20 -alkyl, ie a C _11-20 -alkanyl having 11 to 20 C-atoms, ie with 11, 12, 13, 14, 15, 16, 17, 18, 19 or 20 carbon atoms. A very particularly preferred C _7-30 -alkyl is a C _14-18 -alkyl, ie a C _14-18 -alkanyl having 14 to 18 C-atoms, ie with 14, 15, 16, 17 or 18 C-atoms.

The term "alkenyl" or "C _7-30 alkenyl" for the purposes of this invention comprises C _7-30 alkenyls, ie acyclic unsaturated aliphatic hydrocarbon radicals, which may be branched or unbranched, having 7 to 30 carbon atoms, ie with 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29 or 30 C atoms , Alkenyls have at least one, possibly also 2, 3, 4, 5 or 6 C = C double bonds. Preferably, alkenyl is selected from the group consisting of n-heptenyl, n-octenyl, n-nonenyl, n-decenyl, undecenyl, dodecenyl, tridecenyl, tetradecenyl, pentadecenyl, hexadecenyl, heptadecenyl, octadecenyl, nonadecenyl, eicosenyl, henicosenyl, docosenyl, tricosenyl , Tetracosenyl, pentacosenyl, hexacosenyl, heptacosenyl, octacosenyl, nonacosenyl and triacontenyl. A particularly preferred C _7-30 alkenyl is a C _11-20 alkenyl having 11 to 20 C atoms, ie having 11, 12, 13, 14, 15, 16, 17, 18, 19 or 20 C atoms. A very particularly preferred C _7-30 alkenyl is a C _14-18 alkenyl having 14 to 18 C atoms, ie having 14, 15, 16, 17 or 18 C atoms.

The sealing layer (a) of the film according to the invention particularly preferably contains at least one alkoxylated amine of the general formula (Ia) R ^{1 is} -N- [C _n H _2n -OH] ₂ (Ia), wherein
R ^{1 is} C _11-20 alkyl, C (= O) C _11-20 alkyl, C _11-20 alkenyl or C (= O) C _11-20 alkenyl; and
n is 2, 3, 4 or 5, most preferably 2;
With very particular preference the sealing layer (a) of the film according to the invention contains at least one alkoxylated amine selected from the group comprising N, N-bis (2-hydroxyethyl) -tetradecylamine, bis (2-hydroxyethyl) -pentadecylamine, bis (2-hydroxyethyl) hydroxyethyl) hexadecylamine, bis (2-hydroxyethyl) heptadecylamine, bis (2-hydroxyethyl) octadecylamine, bis (2-hydroxyethyl) -tetradecenylamine, bis (2-hydroxyethyl) pentadecenylamine, bis (2-hydroxyethyl) hydroxyethyl) hexadecenylamine, bis (2-hydroxyethyl) heptadecenylamine, bis (2-hydroxyethyl) octadecenylamine, caprylic acid diethanolamide, capric acid diethanolamide, lauric acid diethanolamide, myristic acid diethanolamide, palmitic acid diethanolamide, stearic acid diethanolamide, oleic acid diethanolamide, linoleic acid diethanolamide, linoleic acid diethanolamide, and arachidonic acid diethanolamide.

For the purposes of this invention, a "polyol fatty acid ester" is understood to mean an ester of a polyhydric, ie, for example, a dihydric, tri-, tetrahydric or pentavalent alcohol, at least one of the alcohol functions of such a polyhydric alcohol having an aliphatic, branched or unbranched alcohol , saturated esterified or unsaturated fatty acid esterified. If several alcohol functions of the polyhydric alcohol are esterified with fatty acids, these alcohol functions can each be esterified independently with different fatty acids. Preferred polyhydric alcohols are ethylene glycol, glycerol (glycerol) and 1,4-butanediol. Particularly preferred is glycerin. Glycerol fatty acid esters thus include monoglycerides, diglycerides and triglycerides. Preferably, the fatty acids are selected from the group comprising caprylic acid, capric acid, lauric acid, myristic acid, palmitic acid, stearic acid, oleic acid, linoleic acid, linolenic acid and arachidonic acid.

worin
R², R³ und R⁴ jeweils unabhängig voneinander für H, -C(=O)-C_7-30-Alkyl oder -C(=O)-C_7-30-Alkenyl stehen, wobei wenigstens einer der Substituenten R², R³ und R⁴ ungleich H ist, vorzugsweise genau einer der Substituenten R², R³ und R⁴ ungleich H ist.The sealing layer (a) of the film according to the invention preferably contains as second component of the antifogging-additive combination at least one polyol fatty acid ester of the general formula (II)

wherein
R ² , R ³ and R ^{4 are} each independently H, -C (= O) -C _7-30 alkyl or -C (= O) -C _7-30 alkenyl, at least one of the substituents R ² , R ³ and R ^{4 is} not H, preferably exactly one of the substituents R ² , R ³ and R ^{4 is} not H.

Especially Preferably, the sealing layer (a) of the invention Film selected at least one polyol fatty acid ester from the group comprising glycerol monostearate, glyceryl distearate, Glycerol monolaurate, glycerol dilaurate, glycerol monopalmitate, glycerol dipalmitate, Glycerol monomyristate and glycerol myristate.

Preferably contains the sealing layer (a) of the invention Film 0.03 wt .-% to at most 0.15 wt .-% at least an alkoxylated amine based on the total weight of the sealant layer (a) and 0.2 wt% to 4.0 wt%, particularly preferably 1.0 to 3.0 Wt .-% of at least one polyol fatty acid ester, based on the total weight of the sealing layer (a).

The Sealing layer (a) is one of the surface layers of inventive film.

Preferably is the sealing layer (a) of the invention Foil corona treated.

In a preferred embodiment contains the Sealant layer (a) at least one further additive selected from the group comprising dyes, antiblocking agents, antistatic agents, Plasticizers and inorganic fillers.

Preferably the sealant layer (a) contains 0.01-5% by weight, especially preferably 0.1-1 wt .-%, based on the total weight of Sealant layer (a) at least one of the above further additives.

Preferably has the sealing layer (a) of the invention Film has a layer thickness of 3 microns to 150 microns, especially preferably from 5 μm to 100 μm, very particularly preferably from 10 microns to 50 microns.

As already mentioned, the inventive Single-layered or multi-layered film, preferably multi-layered be.

In a preferred embodiment, the inventive At least one barrier layer (b), preferably a gas barrier layer, particularly preferably an oxygen barrier layer.

to Production of the barrier layer (b) is preferably at least suitable an ethylene-vinyl alcohol copolymer (EVOH), polyvinyl alcohol (PVOH) or a mixture of at least two of said polymers, especially preferably at least one ethylene-vinyl alcohol copolymer (EVOH).

The ethylene-vinyl alcohol copolymers (EVOH) used to prepare the barrier layer are prepared by complete or incomplete hydrolysis of corresponding ethylene-vinyl acetate copolymers (EVAc) won. Preferably, fully hydrolysed ethylene-vinyl acetate copolymers having a saponification degree of 98% and an ethylene content of 0.01-80 mol%, preferably 1-50 mol%, are used.

The preferably used for the preparation of the barrier layer (b) Polyvinylalcohols are made by complete hydrolysis of obtained corresponding polyvinyl acetates (PVA) and are thus vollverseifte polyvinyl acetates with a saponification degree ≥ 98%.

Preferably has the barrier layer (b) of the invention Film has a layer thickness of 1 .mu.m to 30 .mu.m, especially preferably from 1 micron to 20 microns, most preferably from 2 μm to 10 μm.

Preferably comprises the film according to the invention at least a layer (c) based on at least one polyamide, preferably serves as a protective film for the barrier layer (b).

The The polyamides used to prepare the layer (c) are preferably thermoplastic aliphatic, partially aromatic or aromatic Polyamides. Accordingly, for the production of these Polyamides used diamines either aliphatic diamines 2-10 carbon atoms such as. Hexamethylenediamine or aromatic Diamines with 6-10 carbon atoms such. B. p-phenylenediamine and the dicarboxylic acids used to prepare these polyamides aliphatic or aromatic dicarboxylic acids having 6-14 carbon atoms such as As adipic acid, terephthalic acid or isoterephthalic acid be. Furthermore, the polyamides of lactams with 4-10 Carbon atoms such. B. ε-caprolactam can be produced. Used according to the invention Polyamides are z. As PA 6, PA 12, PA 66, PA 6I, PA 6T and / or mixtures at least two of said polymers.

Preferably has the layer (c) of the film according to the invention a layer thickness of at most 10 microns, especially preferably at most 5 microns, most preferably of at most 3 μm.

In a further preferred embodiment of the invention Film has the barrier layer (b) on both sides of each of its surfaces a layer (c) immediately adjacent to it, so that the layer sequence (c) - (b) - (c) gives.

Preferably comprises the film according to the invention at least another layer (d) based on at least one olefin homo- or copolymer.

Preferably, these are thermoplastic olefin homo- or copolymers of α, β-unsaturated olefins having 2-6 carbon atoms such as. As polyethylene (PE, especially LDPE or HDPE), polypropylene (PP), polybutylene (PB), polyisobutylene (PI) or mixtures of at least two of said polymers. By "LDPE" is meant low density polyethylene, which has a density in the range of 0.86-0.93 g / cm ³ and is characterized by a high degree of branching of the molecules. By "HDPE" is meant high density polyethylene which has little branching of the molecular chain, the density being in the range of 0.94 to 0.97 g / cm ³ .

Especially at least one polyethylene is preferred for the preparation of the layer (d) or polypropylene used.

These Layer (d) has a layer thickness of 3 μm to 50 μm, particularly preferably from 4 μm to 35 μm, very particularly preferably from 5 .mu.m to 20 .mu.m.

In a preferred embodiment of the invention Film is the sealing layer (a) with an adjacent barrier layer (b) or an adjacent layer (c) via a primer layer connected.

In a further preferred embodiment of the invention Foil is also the layer (d) with an adjacent layer (c) above a bonding agent layer connected.

An adhesion promoter or a primer layer in the context of the present invention is a layer of a modified olefin homo- or copolymer which is modified with polar groups, preferably with organic acid groups (carboxyl groups) or organic acid anhydride groups. A preferred adhesion promoter polymer is an ethylene or propylene homo- or copolymer modified with cyclic organic acid anhydride groups, more preferably ethylene or propylene homo- or copolymer modified with maleic anhydride groups. A preferred modification is by Pfrop fung.

Thus, in a preferred embodiment of the present invention, between the sealing layer (a) and the layer (c), a primer layer (h ₁ ) is preferably arranged based on at least one maleic or propylene homo- or copolymer modified with maleic anhydride groups.

In a further preferred embodiment of the present invention, an adhesion promoter layer (h ₂ ), preferably based on at least one maleic anhydride group-modified ethylene or propylene homo- or copolymer, can also be arranged between the layer (d) and the layer (c) ,

The adhesion promoter layers (h ₁ ) and (h ₂ ) of the film according to the invention, each independently of one another, preferably have a layer thickness of at most 10 μm, more preferably of at most 5 μm.

In a very particularly preferred embodiment of the film according to the invention, the barrier layer (b) has an immediately adjacent layer (c) on both sides. One of the layers (c) can be connected via an adhesion promoter layer (h ₁ ) to the sealing layer (a) and the other layer (c) to the layer (d) via an adhesion promoter layer (h ₂ ). Overall, this results in a layer sequence (a) - (h ₁ ) - (c) - (b) - (c) - (h ₂ ) - (d).

The Production of the film according to the invention can according to Any manufacturing method such. B. by lamination, extrusion or preferably by coextrusion. It should be noted, that the doping of the sealing layer (a) with the invention for Use coming antifog additive combination by mixing the premixed components of the combination, by mixing the respective separately added components or by mixing with a masterbatch from the combination of the anti-fog additives in the seal-layer polymers, takes place with the sealing layer polymers. This mixing can be done in Granules / powder or granules / granules form done dry. It But it is also possible, the prepared antifog additive combination the molten polymer for the sealing layer (a) to be added, preferably by dosing in a for the extrusion of the sealing layer (a) used extruder.

there can be both single and all layers the film of the invention by extrusion, preferably by flat film extrusion (cast extrusion), in particular by Flat film co-extrusion (cast-co-extrusion) are formed.

Become individual layers of the film according to the invention manufactured separately by one of the above methods, it can a possibly used adhesion promoter z. B. as a powder, in the form of a Foil, melt or as liquid preparation, for example as a solution or dispersion, by conventional methods like spraying or pouring on one of the layers the film of the invention, such as. B. on the Barrier layer (b), the sealing layer (a) or the layer (d) applied and connected to another layer. Alternatively, you can the bonding agent possibly also on one of the layers, such. B. on the barrier layer (b), the sealant layer (a) or the layer (d) being laminated by extrusion and another layer of it get connected.

These Manufacturing process and corresponding production parameters are generally known to the person skilled in the art.

The film according to the invention is preferably by Co-extrusion produced using a flat-film coextrusion process is very particularly preferred.

The The film according to the invention can also be at least one Carrier layer (s) based on at least one thermoplastic Polymer include.

Preferably can be selected for thermoplastic polymers from the group comprising olefin homo or copolymers, polyamides and polyesters are used.

In addition to the olefin homopolymers or copolymers or polyamides described above, thermoplastic, aliphatic, partially aromatic or aromatic polyesters are preferably suitable for the preparation of the carrier layer (s). Accordingly, these polyesters of polyols such as. As ethylene glycol or 1,4-butanediol and dicarboxylic acids such as adipic acid, terephthalic acid or isoterephthalic acid. Preferably, polycarbonates (PC), polybutylene adipate (PBA), polyethylene terephthalate (PET), polybu tylene terephthalate (PBT) or the corresponding co-polymers.

All particularly preferably suitable for producing a carrier layer (e) is at least one polyester, more preferably a polyethylene terephthalate (PET) and / or a polybutylene terephthalate (PBT).

The Carrier layer (s) of the invention Film can be embossed and / or stretched, preferably monoaxially or biaxially oriented, more preferably biaxially oriented.

The Backing layer (s) may be combined with layer (c) of the above layer composite described via a laminating adhesive, preferably bonded to a polyurethane adhesive.

The Carrier layer (s) of the invention Foil preferably has a layer thickness of 3 μm to 150 μm, more preferably from 3 μm to 100 μm, more preferably from 5 microns to 50 microns.

The Carrier layer (s) of the invention Foil can be printed and / or transparent.

The Film according to the invention is suitable for the production of packaging of any kind.

One Another object of the present invention is therefore the use the film according to the invention for the production at least a packaging element, preferably a cover sheet of a Packaging, a packaging, preferably at least one Packing element having packaging, particularly preferred a packaging having at least one lidding film.

One Another object of the present invention is at least one Packaging element, preferably a lidding film of a two-part Packaging of the film according to the invention.

packagings from a film according to the invention are also Another object of the present invention.

Preferably The packaging can be used as packaging for a wide variety of applications Goods are used. Such goods can Foods, preferably perishable foods, especially prefers to be fresh meat.

The Therefore, packaging according to the invention are suitable preferably as food packaging, particularly preferably as Packaging for perishable food, especially preferred for fresh meat.

Determination of the antifogging effect

A:

Bildung einer opaken Schicht kleiner Tröpfchen

B:

Bildung einer opaken oder transparenten Schicht großer Tröpfchen

C:

Bildung einer transparenten Schicht großer Tröpfchen

D:

Bildung von zufällig verstreuten oder einzelnen großen Tröpchen

E:

keine Tröpfchenbildung

The antifogging effect of a film is determined as follows:
A beaker filled with 200 ml of tap water (temperature: 15-20 ° C) is closed with a film sample to be tested. For this purpose, the respective film pattern is stretched with a Gummirung close to the opening of the beaker, wherein the side to be tested of the film pattern faces the water. The beaker filled with tap water is then stored in the refrigerator for 24 h at a temperature of 4 ° C. and the antifogging effect of the foil sample to be tested is stored after the 24 h and after 3 months according to the following grading system A to E judged:

A:

Formation of an opaque layer of small droplets

B:

Formation of an opaque or transparent layer of large droplets

C:

Formation of a transparent layer of large droplets

D:

Formation of randomly scattered or single large droplets

e:

no droplet formation

Determination of deposit formation

The Blooming of a film is determined as follows: a two-week storage at a temperature of 30 ° C. and after three months storage at a temperature of 30 ° C The film patterns are based on the formation of a coating on the sealing layer (a), d. H. examined for blooming.

(+):

kein Blooming

(0):

geringes Blooming

(–):

starkes Blooming

The deposit formation is evaluated as follows:

(+):

no blooming

(0):

low blooming

(-):

strong blooming

The The following examples and comparative examples serve to illustrate However, the invention is not to be interpreted as limiting.

I. Preparation of the films

The Films of Comparative Examples 1 to 3 and Example 1 are each single-layered, each have a layer thickness of 50 microns and were prepared by flat film extrusion. The foil of Example 2 consists of 7 layers, has one given below Layer structure, has a layer thickness of 42 microns and was also produced by cast co-extrusion. The sealing layer (a) the film of Comparative Examples 1 to 3 or Examples 1 and 2 are each corona-treated on the sealing side.

II. Comparative Examples

All The following% data are in each case% by weight.

II.1 Comparative Example 1 (V1)

The single-layered film (sealing layer (a)) has the following composition and is 50 μm thick. Polypropylene homopolymer: 97.85% glycerol: 2.00% Silica (antiblocking agent): 0.15%

II.2 Comparative Example 2 (V2)

The single-layered film (sealing layer (a)) has the following composition and is 50 μm thick. Polypropylene homopolymer: 99.70% N, N-bis (2-hydroxyethyl) - (C _14-18 alkyl) amine: 0.15% Silica (antiblocking agent): 0.15%

II.3 Comparative Example 3 (V3)

The single-layered film (sealing layer (a)) has the following composition and is 50 μm thick. Polypropylene homopolymer: 94.85% glycerol: 5.00% Silica (antiblocking agent): 0.15%

III. Examples

All The following% data are in each case% by weight.

III.1 Example 1 (B1)

The single-layered film (sealing layer (a)) has the following composition and is 50 μm thick. Polypropylene homopolymer: 97.00% glycerol: 1.70% N, N-bis (2-hydroxyethyl) - (C _14-18 alkyl) amine: 0.15% Silica (antiblocking agent): 0.15%

III.2 Example 2 (B2)

• *MA = Maleinsäureanhydrid

The multilayer film has the following composition and is 42 μm thick. layer layer thickness Sealant layer (a) containing: 18 μm Polypropylene copolymer: 97.00% glycerol: 1.70% N, N-bis (2-hydroxyethyl) - (C _14-18 alkyl) amine: 0.15% Silica (antiblocking agent): 0.15% Adhesive layer (h ₁ ): PE (modified with MA *) 4 μm Layer (c): polyamide 6 1.5 μm Barrier layer (b): EVOH (ethylene content: 38%) 3 μm Layer (c): polyamide 6 1.5 μm Primer layer (h ₂ ): PP copolymer (modified with MA *) 3 μm Layer (d): LDPE 11 μm

• * MA = maleic anhydride

IV. Antifogging effect and formation of deposits

The anti-fog effect and blooming of the films according to Examples 1-2 and Comparative Examples 1-3 was determined by the methods indicated above and the evaluation is given in the following table: Examples / Comparative Examples Antifogging effect (after 24 h) Antifogging effect (after 3 months) Surface formation (after 2 weeks) Surface formation (after 3 months) V1 FROM FROM (0) (0) V2 FROM FROM (+) (+) V3 D D (-) (-) 81 e e (+) (+) B2 e e (+) (+)

QUOTES INCLUDE IN THE DESCRIPTION

This list The documents listed by the applicant have been automated generated and is solely for better information recorded by the reader. The list is not part of the German Patent or utility model application. The DPMA takes over no liability for any errors or omissions.

Cited patent literature

• WO 01/89830 A1 [0003]

Claims (20)

A single-layer or multi-layered film with permanent antifogging action comprising a sealing layer (a) based on at least one thermoplastic olefin homo- or Copolymers containing an antifogging additive combination of at least an alkoxylated amine and at least one polyol fatty acid ester. A film according to claim 1, characterized in that the alkoxylated amine is at least one amine of the general formula (I) R ¹ -N [(C _m H _2m ) -OH] [(C _n H _2n ) -X] (I), wherein R ^{1 is} C _7-30 alkyl, C (= O) C _7-30 alkyl, C _7-30 alkenyl, or C (= O) C _7-30 alkenyl; n and m are each independently 1, 2, 3, 4, 5, 6, 7 or 8, preferably 2, 3, 4 or 5; X is H or OH. A film according to claim 1 or 2, characterized in that at least one fatty acid ester of the general formula (II) is present as the polyol fatty acid ester

wherein R ² , R ³ and R ^{4 are} each independently H, -C (= O) -C _7-30 alkyl or -C (= O) -C _7-30 alkenyl, wherein at least one of the substituents R ² , R ³ and R ^{4 is} not H, preferably exactly one of the substituents R ² , R ³ and R ^{4 is} not H. A film according to any one of the preceding claims, characterized in that 0.03 wt .-% to at most 0.15 wt .-% of at least one alkoxylated amine, based on the Total weight of the sealing layer (a) are present. A film according to any one of the preceding claims, characterized in that 0.2 to 4.0 wt .-%, preferably 1.0 up to 3.0% by weight of at least one polyol fatty acid ester, based on the total weight of the sealing layer (a) are present. A film according to any one of the preceding claims, characterized in that the sealing layer (a) has a surface layer represents the film. A film according to any one of the preceding claims, characterized in that the sealing layer (a) corona treated is. A film according to any one of the preceding claims, characterized in that it comprises at least one barrier layer (b). A film according to claim 8, characterized the barrier layer (b) comprises a gas barrier layer, preferably an oxygen barrier layer. A film according to claim 8 or 9, characterized in that the barrier layer (b) is based on at least one ethylene-vinyl alcohol copolymer (EVOH), polyvinyl alcohol (PVOH) or a mixture of at least two of said polymers, more preferably at least an ethylene-vinyl alcohol copolymer (EVOH) based. A film according to any one of the preceding claims, characterized in that it comprises at least one layer (c) based comprises at least one polyamide. A film according to claim 11, characterized that the barrier layer (b) on each of its surfaces a layer immediately adjacent to the barrier layer (b) (c). A film according to any one of the preceding claims, characterized in that the film is obtainable by coextrusion, preferably obtainable by cast co-extrusion. A film according to any one of the preceding claims, characterized in that it comprises at least one carrier layer (e) based on at least one thermoplastic polymer. A film according to any one of the preceding claims, characterized in that it comprises at least one carrier layer (e) selected based on at least one thermoplastic polymer from the group comprising olefin homo or copolymers, polyamides and polyester, preferably based on at least one polyester includes. A film according to any one of the preceding claims, characterized in that the carrier layer (e) is biaxial is oriented, preferably in the longitudinal and transverse directions in a ratio of 1: 5, preferably 1: 3. Use of the film according to one of the preceding Claims for the production of at least one packaging element, preferably a lidding film of a packaging, a packaging, preferably having at least one packaging element Packaging, particularly preferably one at least one lidding film having packaging. A packaging element, preferably a lidding film a packaging made of a film according to one of the claims 1-16. Packaging of a film according to one of the claims 1-16. Packaging of a film according to claim 19, characterized characterized in that the packaging is food packaging, preferably packaging for perishable food, are particularly preferred for fresh meat.