Multilayer thermoformed film for protection of the substrate and the resulting product

 

Group of inventions relates to a substrate and a multilayer thermoformed film, which consistently contains at least one layer selected from the layers (A1) and (A2). Moreover, if there is a layer (A2), it is possible to present a layer (B1) may layer (B1), the layer (B2), the layer (B3), it is possible layer (B4). In the film layer (A1) contains a fluorine-containing polymer (A111 motorway) or polymer (A112), consisting mainly of alkyl (meth)acrylate units, or a mixture of both polymer layer (A2) consists of paint, a layer (B1) contains a fluorine-containing polymer (V) or polymer (B), consisting mainly of alkyl(meth)acrylate units, or a mixture of both, the layer (B2) is based on polyamide with terminal amino groups, the layer (B3) is formed by a polyolefin with functional groups, obtained by the action of the anhydride of unsaturated carboxylic acid, the layer (B4) consists of a polyolefin. According to one variant of the invention, the layer (A1) consists of two layers: (A11) and (A12), the layer (A11) contains a fluorine-containing polymer (A111 motorway) or polymer (A112), consisting mainly of alkyl(meth)acrylate units, or a mixture of both, the layer (A12) contains from 0 to 50 wt.% fluorine-containing polymer (A111 motorway) and from 50 to 100 wt.% polymer (A112), consisting mainly of alkyl(m and, you can ekstradiroval together at least two layers and then apply other layers or separately, or by using the coextrusion or use any combination of these possibilities. Preferably separately manufacturing a film containing layers (B), and a film containing layers (a), then connect them when heated. It is possible to make the substrate coated film according to any one of paragraphs.1-11 of the claims. The technical result is an improvement of the adhesion layer of fluorinated polymer and easy decorating substrates multilayer film having an outer layer of acrylic or fluorinated polymer. 2 S. and 11 C.p. f-crystals, 1 table.

The invention relates to a multilayer thermoformed film to protect the substrate and to the resulting products.

Such films can be, in particular, used in the field of construction and transportation. In the automotive industry is used, in particular, many body parts from plastics, such as bumpers, mirrors, hood, and other parts, such as doors and wings, not to mention facing the interior parts of the car. The advantage of these components is most easily compared with the same d the d the pressure of the molten material and/or thermoforming of thermoplastic material. However, there is one technical difficulty, namely that the plastic parts are more difficult to dye than with steel. One solution to this problem consists in coating parts painted or decorative film, and this film may be single - or multi-layered. Typically, such a film is disposed on the inner surface of the mold, after which there are pressed molten plastic (substrate) and after cooling and removal from the mold to receive the item, covered with a colored film is the casting method in the shell. The adhesion film is provided by contact of the molten plastic material film, leading to melting of the surface of the film by pressing a plastic material and, consequently, to welding. It is also possible joint extrusion of the substrate and the color film, stacking the substrate on color film or hot napressovyvanie substrate on color film with subsequent thermoforming of the resulting Assembly.

The present invention relates to the above-mentioned films and substrates by coating the above mentioned ways.

In U.S. patent 5514427 proposed to use a method called "solvent cast, for a teacher who is primarily in the preparation of liquid compositions of thermoplastic polymer in the solvent, contains the actual polymers, the dispersion of pigments and additives which meet these specifications. Next, this liquid composition is evenly applied on the moving tape. The last part in a drying oven, in which removal of the solvent in the evaporation and melting of the composition with the formation of a continuous layer. A continuous film is then wound into a roll. The film structure includes on the fly from the inside (side substrate consisting of a polyolefin or a copolymer of Acrylonitrile-butadiene-styrene) output layer of a chlorinated polyolefin, a layer of acrylic adhesive and a pigmented layer on the basis of fluorine-containing polymer and alkylmethacrylamide.

In patent WO 99/37479 describes a multilayer film obtained by the method of "solvent cast and lamination, which is, along the inside (from the substrate) to the outside, respectively, of the adhesive layer, pressure sensitive adhesive" (pressure sensitive adhesive), pigmented opaque layer of fluorine-containing polymer, in which the charges do not have a specific orientation, and a transparent layer on the basis of fluorine-containing polymer.

In the patent EP 949120 proposed multi-layer film consisting along the inside narutakisou layer, color pigmented fluorine-containing layer (without a specific orientation), and a transparent fluorine-containing layer, whereby the surface of this film can be pressed in different substrates, such as polyolefins or polyamides.

In U.S. patent 5725712 features obtained by laminating thermoformed multi-layer film composed on the fly from the inside to the outside of the adhesive layer, a color pigmented layer, in which the charges do not have a specific orientation, and a transparent layer.

In U.S. patent 5707697 describes decorated and resistant to bad weather conditions the outer part of the body. This item consists of a multilayer film obtained by the method of "solvent cast with subsequent lamination, and the substrate. The structure of the film along the inside out includes a layer of a chlorinated polyolefin that can stick to the polyolefin substrate, a color pigmented layer on the basis of fluorine-containing polymer, in which the charges do not have a specific orientation, and a transparent layer of fluorine-containing polymer having luster.

In patent WO 9640480 described multilayer structure, which includes on-the-go from the inside to the outside reinforcing layer (type copolymer Acrylonitrile-butadiene-St is limera based polyvinylidenedifluoride (PVDF) in a mixture of acrylic polymer, and a transparent surface layer consisting of a mixture of homopolymer of vinylidenefluoride with acrylic polymer.

In patent WO 9403337 proposed multilayer material composed on the fly from inside to outside of the substrate, adhesive layer, consisting of substances that are compatible with the substrate, the reinforcing layer, the color layer, which contains pigments in acrylic, urethane or vinyl matrix, and finally a transparent layer on the basis of polyvinylidenedifluoride (PVDF) and polimetilmetakrilata (emission spectra obtained for pure) with a gradient composition. The reinforcing layer may be formed of a polybutylene terephthalate (RHT), polyethylene-terephthalate (PET), a copolymer of Acrylonitrile-butadiene-styrene (ABS), polyvinyl chloride (PVC), PA, complex, polyester, polycarbonate (PC), polyolefin, copolymer of ethylene with alkyl(meth) acrylate, an acrylic polymer or a mixture of at least any two of these polymers.

In U.S. patent 5658670 describes a two-layer film obtained by coextruding and hot pressing layer polyvinylidenedifluoride (PVDF) or its derivatives and a layer of RA, polyurethane or polyolefin, modified by any amine.

In the patent application JP 09 193189 And published 29.07.1997, describes the film containing layer 4, which in the course of the symptom the cops), the layer of copolymer of ethylene-glycidylmethacrylate and transparent surface layer on the basis of polymethylmethacrylate (emission spectra obtained for pure).

In patents FR 2740384 and FR 2740385 describes a film having a three or four layer based on a polyamide and a chemically modified polypropylene, which allows to perform the decorated surface.

The weak point of the present films is an adhesion layer of fluorinated polymer to other layers. In the present paper the film, in which the adhesion layer of fluorine-containing polymer is significantly improved. More generally, it was also discovered that are suitable for the protection and decoration of substrates multilayer film having an outer layer of acrylic or fluorinated polymer, can be easily decorated. In addition, the film according to the invention is much easier to manufacture than existing film - in particular, it does not require the use of solvent.

The present invention relates to a multilayer thermoformed film, which sequentially includes: at least one layer selected from the layers (A1) and (A2), and if there is a layer (A2), it is possible to present a layer (B1) may be a layer (B1), the layer (B2), the layer (B3) - wasmainly(meth)acrylate units, or a mixture of both polymer layer (A2) consists of the paint layer (B1) contains a fluorine-containing polymer (B111) or polymer (B), consisting mainly of alkyl(meth)acrylate units, or a mixture of both polymers, the layer (B2) is based on polyamide with terminal amino groups,
layer (B3) is formed by a polyolefin with functional groups of the anhydride of unsaturated carboxylic acid,
layer (B4) consists of a polyolefin.

According to one variant of the invention, the layer (A1) is replaced by two layers: (A11) and (A12), and the order of layers in this case is as follows:
- (A11) and(A12)/possible (A2)/possible (B1)/(B2)/(B3)/ possible (B4),
layer (A11) contains a fluorine-containing polymer (A111 motorway) or polymer (A112), consisting mainly of units of alkyl(meth)acrylate, or a mixture of both polymers,
layer (A12) contains from 0 to 50 wt.% fluorine-containing polymer (A111 motorway) and from 50 to 100 wt.% polymer (A112), consisting mainly of alkyl(meth)acrylate units.

Will not be considered beyond the scope of the invention, if the various above-mentioned cushioning layers contain modifiers, pigments, paints, additives, and improved resistance to external aging, such as absorbers of ultraviolet radiation and antioxidants.

Tack together at least two layers and then apply other layers or separately, either by coextrusion or use any combination of these possibilities. Preferably separately manufacturing a film containing layers (B), and a film containing layers (a), then connect them when heated. You can also simultaneously be laid using layer-by-layer coextrusion all the layers (b) for pre-manufactured film consisting of layers (A).

If the layers (A) contains (A1) (or (A11) and (A12) and (A2), it is preferable that the layer (A2) was a layer which is laid on the layer (A1) or (A12).

If the layers (A) contain only (A2), first produce a film consisting of layers (B), and then the layer (A2) is applied to the layer (B2) or may present layer (B1). In this case, the layer (A2) after application can be lacquered.

The film formed by the layers (a) and (b) may contain a protective layer stacked on the layer (A) closest to the external surface of the film, i.e., the layer (A1) or (A11) or (A2), or Lac, located in (A2). This protective layer can be applied after manufacture of the film formed by the layers (A), unless the film, of course, is not formed only (A2), or to be incurred after the merger with layers ().

Colored or decorated film get bluecolour for coating various substrates, for example zapressovyvaja substrate in the molten state on a multilayer film located on the inner surface of the mold, and the film is placed on the wall of the mold from the side of layer (A).

The present invention also relates to substrates coated with these films.

In regards to the layer (A) contains (A1) or (A11) and (A12), the ensemble of these layers is formed from a polymer or mixture of polymers, which provide a transparent, shiny surface, resistant to aggressive chemical or external nature, or to UV radiation.

The layer (A2) is formed by a paint which can be applied to the layer (A1) or (A12) using all known methods (using geografii, flexo printing, serigraphy, offset printing, sublimation printing or transfer).

The ensemble of these layers (A) has a thickness mainly from 1 to 200 μm and preferably from 5 to 140 μm.

As examples of fluorine-containing polymer (A111 motorway) can be, in particular, are:
- PVDF: homopolymers of vinylidenefluoride (VF2) and copolymers of vinylidenefluoride (VF2), mainly containing at least 50 wt.% VF2 and at least one other fluorinated monomer, such as chlorotrifluoroethylene (CTFE), examinera and in particular, ternary copolymers, uniting the remnants of links chlorotrifluorethylene (CTFE), tetrafluoroethylene (TFE), hexaferrite (HFP) and/or ethylene, and possibly parts of VF2 and/or VF3.

Of the fluorine-containing polymer (A111 motorway) predominantly use PVDF. Without leaving the scope of the invention, a mixture of polymers (A111 motorway).

In the layers (A1) and (A11), it is recommended to add another polymer (A112), which helps to enhance the adhesion with subsequent possible layer (A2), or the layer (A12), or with the next layer (b).

Polymers (A112), formed mainly by the links of the alkyl(meth)acrylate, can also contain functions of the acid, acid chloride, alcohol, anhydride.

As examples of the polymer (A112) can be called the homopolymers of alkyl(meth)acrylate. The alkyl(meth)acrylates are described in KIRK-OTHMER, Encyclopedia of chemical technology, 4th edition, Vol. I, pp. 292-293 and in Vol. 16, pp. 475-478. Can be also referred to as copolymers of at least two of these (meth)acrylates and copolymers of at least one (meth)acrylate with at least one monomer selected from Acrylonitrile, butadiene, styrene and isoprene, provided that the content of the (meth)acrylate is at least 50 mol.%. (A112) is largely used polymethyl - methacrylate (emission spectra obtained for pure). Polymers (A112) obrazovni they additionally contain acrylic cushioning modifier. Acrylic cushioning modifiers are, for example, statistical copolymers or sequences of at least one monomer selected from styrene, butadiene and isoprene, and at least one monomer selected from Acrylonitrile and alkyl(meth)acrylate, they may belong to the type of core-shell (core-shell). These acrylic cushioning modifiers can be mixed with the polymer (A112) after its preparation or to be entered in the polymerization process (A112), or be prepared simultaneously in the polymerization process (A112). The amount of acrylic cushioning modifier may be, for example, from 0 to 60 parts by the number from 100 to 40 parts (A112). Will not be considered beyond the scope of the invention if (A112) is a mixture of two or more of the above polymers.

Suitable polymers (A112) are SUMIPEX TRcompany Sumitomo and OROGLASS HT121company Atoglass, and polymers (A111 motorway) - KYNAR 720company ATOFINA. This layer may contain various organic and/or inorganic fillers, such as absorbers of UV radiation from the family TINU or dyes. The layer has a very good resistance to various used car liquids, such as gasoline, coolant, liquid for washing glass, brake fluid, engine oil and hydraulic fluid. This achieves a very good preservation in time of the condition and appearance of the film.

When using the technique of extrusion can be achieved spatial orientation in the flow of pigments and dyes in the layer that gives the film an anisotropic character. For this purpose it is enough to use pigments having anisotropic structural coefficient. Selecting pigments with isotropic structural coefficient (structural coefficient close to 1), it is possible to reliably suppress this effect. The orientation of the pigments gives an interference effect.

In regards to the layer (A) formed by only one layer (A2), the layer (A2) is applied on the possible layer (B1) or the layer (B2). This is carried out in the same manner as the application of (A2) to (A1) or (A12).

In regards to the layer (B1), fluorine-containing polymer (B111) may be selected from the above-mentioned polymers (A111 motorway) and it may be the same or different from the polymer or polymers used in the layer (A). The polymer (B) can be V, used in layer (A). As in the layers (A), polymers (B111) and (V) can be a mixture of polymers.

The polyamide layer (B2) is a homopolymer or copolymer polyamide with terminal amine groups or a mixture of polyamides, of which at least one has a terminal amino group. Under the polyamide refers to the condensation products:
- one or several amino acids, such as aminocaproic, 7-aminoheptanoic, 11-amino-undecanoate and 12-aminododecanoic acid, one or more lactams such as caprolactam, alantolactone and laurinlactam,
- one or more salts or mixtures of diamines such as hexamethylenediamine were, documentrenderer, methoxyaniline, bis-p-aminocyclohexanone and trimethylhexamethylenediamine with dibasic acids such as isophthalic, terephthalic, adipic, azelaic, subernova, sabotinova and dodecadienol acid.

As examples of the polyamide can be called polyamides RA 6, RA 6-6, PA 11 and PA 12.

Can be also successfully used the copolyamids. You can mention the copolyamids formed by condensation of at least two,-aminocarbonyl acids or DTI. You can also call the copolyamids formed by condensation of at least one,-aminocarbonyl acid (or a lactam), at least one diamine and at least one dicarboxylic acid.

As examples of lactams can be called a lactam having from 3 to 12 carbon atoms in the main loop and possibly replaced. Can be mentioned, for example,,-dimethylpropylene,,-dimethylpropylene, amylopectin, caprolactam, caprolactam and laurinlactam.

As examples,-aminocarbonyl acid can be called aminoundecanoic and aminododecanoic acid. As examples of dicarboxylic acids can be called adipic acid, sabotinova acid, isophthalic acid, butandiol acid, 1,4-cyclohexylcarbonyl acid, terephthalic acid, the sodium or lithium salt sulfoisophthalic acid, diarizonae fatty acids (these diarizonae fatty acids contain at least 98% of the dimer and are mainly gidrirovanie) and dodecandioic acid, noos-(CH

As examples of copolyamids can be called copolymers of caprolactam and laurinlactam (PA 6/12), copolymers of caprolactam, adipic acid and diamine (PA 6/6-6), copolymers of caprolactam, of laurinlactam, adipic acid and diamine (RA 6/12/6-6), copolymers of caprolactam, of laurinlactam, 11-aminoundecanoic acid, azelaic acid and diamine (PA 6/6-9/11/12), copolymers of caprolactam, of laurinlactam, 11-aminoundecanoic acid, adipic acid and diamine (PA 6/6-6/11/12), copolymers of laurinlactam, azelaic acid and diamine (RA 6-9/12). Copolyamide preferably selected from RA 6/12 and PA 6/6-6. The advantage of copolyamids is their lower melting temperature compared to the melting temperature RA 6.

To get a terminal amino group, it is enough to perform the synthesis in the presence of spydercam or,-aminocarbonyl acid, diamine or monoamine.

As examples (1) a mixture of blending polyamides and (2) single-phase mixture formed by transaminirovania polyamide and amorphous polyaromatics polyamide. Preferred mixtures are mixtures that still retain the crystallinity and transparency, i.e., are microcrystalline, for example a mixture containing 70 wt.% RA 12 and 30 wt.% PA 12/BMACM-I/BMACM-T, where I and T denote ISO - and terephthalic acid, respectively. You can also mention RA WMSM - 12 and RA of RASM - 12 (RASM denotes p-aminocyclohexanone).

Without leaving the scope of the invention, it is possible to use mixtures of polyamides with any polyolefin. These compounds are predominantly of a polyamide matrix, i.e., they contain from 55 to 100 wt. parts of polyamide on 0-45 wt. parts of the polyolefin, the polyolefin may have a functional group or may be a mixture of a polyolefin with functional groups of the polyolefin without functional groups. As an example it is possible to use polyolefins having functional groups and polyolefins without functional groups described for layer (D).

Particularly suitable polyamide is RA 12 AESN the groups, to create by means of chemical reactions stable in time covalent bond based on anhydrous, acid, acid chloride or alcohol groups present in another layer that is in contact with (B2). The thickness of this layer is mainly from 5 to 200 μm and preferably from 70 to 140 μm. This layer may contain various organic and/or inorganic fillers, such as absorbers of UV radiation from the family of TINUVINcompany Ciba Speciality chemicals. This layer may also contain pigments or dyes.

When using the technique of extrusion can be achieved spatial orientation in the flow of pigments or dyes in the layer that gives the film an anisotropic character. For this purpose it is enough to use pigments having anisotropic structural coefficient. Selecting pigments with isotropic structural coefficient (structural coefficient close to 1), can be successfully eliminated this effect. The orientation of the pigments gives an interference effect.

The layer (B3) is formed by a polyolefin with functional groups introduced with an anhydride of an unsaturated carboxylic acid. The presence of anhydrite group of cases This polyolefin with functional groups often describe defining it as "the coextrusion binder".

The polyolefin is typically homopolymer or copolymer-olefins and diolefins, such as ethylene, propylene, butene-1, octene-1, butadiene. As examples can be mentioned:
the homopolymers and copolymers of polyethylene, in particular LDPE, HDPE, LLDPE (linear low density polyethylene, or polyethylene linear low density), VLDPE (very low density polyethylene, or polyethylene, very low density) or polyethylene-metallocene;
the homopolymers and copolymers of propylene;
copolymers of ethylene/-olefin, such as ethylene/propylene;
the ethylene-propylene rubber (EPR) and ethylene/propylene/ diene rubber (EPDM);
- copolymers of styrene/ethylene-butylene/styrene (SEBS), styrene/butadiene/styrene (SBS), styrene/isoprene/styrene (SIS), styrene/ethylene-propylene/styrene (SEPS);
copolymers of ethylene with at least one product selected from the salts or esters of unsaturated carboxylic acids, such as alkyl(meth)acrylate (such as methyl acrylate or vinyl esters of saturated carboxylic acids such as vinyl acetate, where the concentration of the co monomer can be up to 40 wt.%.

The polyolefin with functional groups of the layer (B3) may be a polymer

(B3) has in his or copolymer, which introduced the function by grafting at least one unsaturated carboxylic acid, anhydride of unsaturated carboxylic acid or derivatives of these acids or anhydrides. These compounds mentioned above. Mainly subjected to vaccination polypropylene with MFI (short for Melt Flow Index, or the index of fluidity in the molten state) from 0.1 to 10 g/10 mm (230oC, 2,16 kg) of maleic anhydride in the presence of initiators, such as peroxides. The number of effectively grafted maleic anhydride may range from 0.01 to 10% by weight grafted polypropylene. Grafted polypropylene can be diluted with polypropylene, rubber EPR, EPDM or copolymers of propylene withthe olefin. According to other variant is possible also to carry out the inoculation of a mixture of polypropylene with EPR or EPDM, adding unsaturated carboxylic acid, anhydride or derivative thereof, a mixture of polypropylene with EPR or EPDM in the presence of the initiator.

As examples of the components of the layer (B3) can be called a mixture containing (wt.%):
- from 0 to 50% and preferably from 10 to 40% of at least one of polyethylene or copolymer of ethylene;
from 50 to 100% and preferably from 60 to 90% by men, Homo - or copolymer of styrene and preferably polypropylene;
moreover, these compounds are grafted with a monomer containing a functional group selected from carboxylic acids and their derivatives, acid chlorides, isocyanates, oxazolines, epoxides, amines or hydroxides and mostly anhydrides of unsaturated dicarboxylic acids;
and these mixtures may dilute at least one polyolefin containing predominantly propylene units, or at least one polymer with an elastomeric nature, or their mixture.

Polymers suitable for use in the layer (B3) are, for example, grafted polypropylene firms ATOFINA and DuPont sold, respectively, under the names of OREVAC PPFTand BYNEL 50E561.
The thickness of this layer is mainly from 10 to 250 μm and preferably from 40 to 110 μm. This layer may contain various organic and/or inorganic fillers, such as absorbers of UV radiation from the family of TINUVINcompany Ciba Speciality chemicals. This layer may also contain pigments or dyes.

When using technical will ridet the film is anisotropic in nature. For this purpose it is enough to use pigments having anisotropic structural coefficient. Selecting pigments with isotropic structural coefficient (structural coefficient close to 1), it is possible to reliably suppress this effect. The orientation of the pigments gives the interference effect. (B3) may also be a mixture of several grafted polyolefins.

Bonding layer (B4), which provides adhesion to the substrate is a polyolefin of those that have been defined for the layer (B3). These materials have sufficient compatibility and affinity in order to ensure adhesion between the layer (B3) and the substrate. Mostly use polypropylene. Materials suitable for the fabrication of this layer are polypropylene 3050 BN1, 3060 MN5 and CZN 0525 company ATOFINA. The thickness of this layer is preferably from 400 to 800 μm, and preferably from 500 to 600 μm. This layer may contain various organic and/or inorganic fillers, such as absorbers of UV radiation from the family of TINUVINcompany Ciba Speciality chemicals. This layer may also contain pigments or dyes.

When using the technique extrance anisotropic character. For this purpose it is enough to use pigments having anisotropic structural coefficient. Selecting pigments with isotropic structural coefficient (structural coefficient close to 1), can be successfully eliminated this effect. The orientation of the pigments gives an interference effect.

A protective layer located closest to the outer surface of the film layer (A), is a temporary layer that helps protect the film during transportation, thermoforming and casting under pressure. This protective layer provides for the maintenance or improvement of the condition of the surface. Thus, this layer can be smooth or rough depending on the desired surface condition. This layer also allows you to refuse the use of agent facilitating the extraction of the mold, which can worsen the condition of the film surface. The thickness of this layer is estimated mainly from 10 to 150 μm and preferably from 50 to 100 μm. The materials used for the fabrication of this layer can be selected from (i) saturated polyesters such as polyethylene terephthalate (PET), polybutylene terephthalate (RHT), copolymers of esters, poly(simple ether)(complex shall be called polyethylene terephthalate (PET), sold by DuPont under the trademark MYLAR. This layer may contain various fillers, such as TiO2, silica, kaolin, calcium carbonate, aluminum flakes and their derivatives.

In regard to the manufacture of the film of the invention and its use, the composition of the different layers can be performed using conventional methods of mixing the components in the molten state with the addition of other components, such as potential fillers (pigments, dyes, UV filters, and so on). The film made mainly coextrusions.

The film of the invention produce coextruding using conventional for thermoplastics technology in which the molten material of different layers push through a flat die, located very close one to another. When connecting the molten material is formed of a multilayer film, which is cooled by posting on rollers with adjustable temperature. Picking up speed rollers arranged in the longitudinal direction and/or rollers arranged in the transverse direction, it is possible to make the hood in the longitudinal and/or transverse direction.

The MFI values of the different layers is chosen as Y in the competence of the specialist coextrusion.

The multilayer film of the invention are suitable for coating substrates either by casting into the shell, or coextruding or coating layer, or by hot pressing. Mostly use molding to the shell. If the mold has a simple form, the fill of the substrate in the molten state is sufficient for compression of the film to the wall of the mold - in this case, use the film in the form in which it was made. If the mold has a more complex form, in order to avoid stress in the film and to ensure good contact of the film with the walls of the mold before you put the film into the mold, the film must be pre-shaped by using thermoforming. You can use another mold of the same shape and using products that have the same shape, but in the positive, is produced by thermoforming film. Can be used the same mold used for casting substrate. In the intermediate case can be thermoforming, and to place the film in the initial state in the mold and with the help of compressed air from the casting substrate to press the film against the wall of the mold. You can also create a vacuum on the other side of the film to press e to possess a range of temperatures thermoforming, providing a wider area to cover. As an example, the table below shows the melting temperature (i.e. square), minimum temperature thermoforming (TF min) and maximum temperature thermoforming (TF max) of the various layers of the film of the invention.

Different layers may contain fillers and additives provided that they will not affect the transparency of the surface layer (B), as well as on color and color effects of the overall structure.

The invention is particularly suitable for coating substrates made of polypropylene.


Claims

1. Multilayer thermoformed film, sequentially containing layer (A2), the layer (B2), the layer (B3), in which the layer (A2) consists of paint, a layer (B2) is based on polyamide with terminal amino groups, the layer (B3) is formed by a polyolefin with functional groups of the anhydride of unsaturated carboxylic acid.

2. Film under item 1, which further includes a layer (B1) containing the fluorine-containing polymer (V) or polymer (B), consisting mainly of alkyl(meth)acrylate units, or a mixture of both polymers, and adjacent to the layer (A2), the layer (B4), consisting of polyolefin what measures (A112), consisting mainly of alkyl(meth)acrylate units, or a mixture of both polymers.

4. Film on p. 3, in which the layer (A1) contains two layers (A11) and (A12), and the order of layers in this case is the following: (A11) and (A12) / possible (A2) / possible (B1) / (B2) / (B3) / possible (B4), consisting of polyolefin, a layer (A11) contains a fluorine-containing polymer (A111 motorway) or polymer (A112), consisting mainly of alkyl(meth)acrylate, or a mixture of both polymers, the layer (A12) contains from 0 to 50 wt.% fluorine-containing polymer (A111 motorway) and from 50 to 100 wt.% polymer (A112), consisting mainly of alkyl(meth)acrylate.

5. Film under item 2 or 3, in which the fluorine-containing polymer (V) and (A111 motorway) is polyvinylidenedifluoride.

6. The film according to any one of paragraphs.2-5, in which the polymer (B) and (A112) is a polymethylmethacrylate.

7. The film according to any one of paragraphs.1-6, in which the polyamide layer (B2) selected from RA 6, RA 12 and PA 6/6-6, and these polyamides have a terminal amino group.

8. The film according to any one of paragraphs.1-7, in which the polyolefin with functional groups of the layer (B3) is grafted polypropylene, possibly diluted with polypropylene, ethylene-propylene rubbers, copolymer ethylene/propylene/diene or a copolymer of propylene withthe olefin.

vivai mixture of polypropylene with ethylene-propylene rubber or ethylene-propylene-diene rubber.

10. The film according to any one of paragraphs.1-9, in which the polyolefin with functional groups of the layer (B3) is a mixture containing from 0 to 50% and, mainly, from 10 to 40% of at least one of polyethylene or copolymer of ethylene, from 50 to 100% and, mainly, from 60 to 90% of at least one polymer selected from polypropylene or copolymer of propylene Homo - or copolymer of 1-butene, Homo - or copolymer of styrene and preferably polypropylene, and the mixture is grafted anhydride of unsaturated carboxylic acid, and this mixture may dilute at least one polyolefin containing predominantly propylene units, or at least one polymer with an elastomeric nature, or their mixture.

11. The film according to any one of paragraphs.2-10, in which the polyolefin layer (B4) is polypropylene.

12. The substrate, parity film according to any one of paragraphs.1-11, in which the layer (B3) or layer (B4) (if it exists) of the film adjacent to the substrate.

13. The substrate for p. 12 formed of polypropylene.

 

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Polymer composition // 2082732

The invention relates to the field of creation of flame-retardant polymer compositions based on polyamides, for the manufacture of various types of structural parts used in electronic and electrical industry

The invention relates to at least four, rocafuerte, biaxially elongated casing for food products with an external layer consisting essentially of a mixture, respectively, at least one aliphatic and partially aromatic (co)polyamide and, possibly, pigments, and the inner layer consisting essentially of aliphatic (co)polyamide
The invention relates to biaxially-oriented thermally stabilized bag films on the basis of polyamides, in particular sausage, sosisochnykh or Satelitni shells, and can be used in the manufacture of food products, formed from a paste-like or viscous-flow state and subjected to heat treatment, for which a significant indicator of quality is the possibility of long-term storage in the shell sausage products without compromising consumer properties

The invention relates to a packaging film having sufficiently high permeability with respect to smoke substances smoke and/or water vapor and can efficiently carry out the curing and/or drying Packed in it products

The invention relates to the field of processing technology of polymers, and more particularly to methods of producing a multilayer polymeric nonwoven materials in the form of paintings of unlimited length

The invention relates to bag films, in particular sausage, sosisochnykh or Satelitni shells and can be used in the manufacture of products generated from a pasty or viscous flow state, for which a significant indicator of quality is the ability to easily remove the shell without damaging the surface

The invention relates to the field of production of duplicate materials based on paper with a polymer coating and can be used in the manufacture of coil binding materials

The invention relates to products made of polyester plastic, preferably polyethylene terephthalate (PET) having one or more layers of thermoplastic material with good barrier characteristics for gas applied directly to at least one of its surfaces, and new methods of making such articles

The invention relates to the field of transportation through pipes of different products and substances, and more specifically to a technology of manufacturing insulating tape, designed to protect against soil corrosion of trunk pipelines, gas pipes, sewer pipes, etc
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