阅读说明：本技术 用于制备多层哑光涂覆表面的方法和包含多层涂覆表面的产品 (Method for producing a multilayer matt coated surface and product comprising a multilayer coated surface ) 是由 M·诺瓦克 M·斯玛斯 J·谢伊万恩 K·科涅奇内 于 2019-07-01 设计创作，主要内容包括：本发明涉及一种用于制备多层哑光涂覆表面的方法,其中载体(1)被包含添加剂的涂层(4)的层覆盖,以增加涂层多个层之间的粘结强度。将所述涂层的层暴露于波长为172nm的准分子辐射下,并且然后用达到所述涂层凝胶化所需的剂量的电子束处理该涂层,或者使用紫外线辐射处理该涂层的层以获得足够的凝胶化效果。将具有粘结强度改善添加剂的至少另一层涂层施涂到第一层上,该至少另一层涂层再次以与针对所述第一层相同的剂量暴露于准分子辐射和电子束或暴露于UV辐射,如果第二层是外层,即最后一层(6),则用为了完成所有涂层的聚合过程所需的剂量的电子束对整个表面进行处理,或者用适当的UV辐射对整个表面进行处理,以实现足够的硬化效果。本发明还涉及一种家具产品,其包含用根据本发明的方法获得的多层哑光涂覆表面。(The invention relates to a method for producing a multilayer matt coated surface, wherein a carrier (1) is covered with a layer of a coating (4) containing additives to increase the adhesive strength between the layers of the coating. The layer of the coating is exposed to excimer radiation with a wavelength of 172nm and then the coating is treated with an electron beam at a dose required to achieve gelation of the coating or treated with ultraviolet radiation to obtain a sufficient gelation effect. At least one further coating layer with an adhesion-improving additive is applied onto the first layer, which is again exposed to excimer radiation and electron beams or to UV radiation at the same dose as for said first layer, and if the second layer is the outer layer, i.e. the last layer (6), the entire surface is treated with electron beams at the dose required for completing the polymerization process of all coating layers, or with suitable UV radiation, to achieve a sufficient hardening effect. The invention also relates to a furniture item comprising a multilayer matt-coated surface obtained with the method according to the invention.)

1. A process for the preparation of a multilayer matt coated surface on a support, using a machine for the application of EB or UV coatings, characterised in that the support (1) is covered by a layer of a coating (4) comprising additives which improve the bond strength between the layers of the coating by means of a coating application system, then the applied layer of the coating is exposed to excimer radiation with a wavelength of 172nm, followed by treatment of the coating with electron beams at a dose of from 2kGy to 7kGy, which corresponds to the dose required to reach the coating gelled state, or treatment of the layer of the coating with ultraviolet radiation to achieve a sufficient gelling effect, at least one further layer of the coating with bond strength improving additives is applied onto the first layer, which is again exposed to excimer radiation and electron beams or to UV radiation at the same dose as for the first layer, wherein if the second layer is the outer, last layer (6), the whole surface is treated with a minimum dose of 35kGy of electron beam or with suitable UV radiation in order to achieve a sufficient hardening effect in order to complete the polymerization of the layers of all coatings.

2. Method according to claim 1, characterized in that the additive improving the adhesive strength of the coating is selected from a group of additives developed on the basis of micronized wax based on very sensitive polyethylene with added propoxylated glycerol triacrylate.

3. The method according to claim 1, characterized in that the coating is treated with an electron beam at a dose of from 2kGy to 6 kGy.

4. A furniture product comprising a multilayer coated surface and a carrier, characterized in that it comprises at least a carrier (1), said carrier (1) being covered by a multilayer matte coated surface obtained by a process according to any one of the preceding claims, at least one coating layer (4) comprising an additive improving the bond strength being applied in an amount of 5 to 30% by weight, wherein the three-dimensional effect of the furniture product is the result of the individual structures of the different layers.

5. The product according to claim 4, characterized in that the carrier (1) is a paper or petroleum-based foil or a chemical foil or a wood-based board.

6. Product according to claim 4, characterized in that the carrier (1) comprises an embossed layer (2).

7. The product according to claim 4, characterized in that the subsequent layers (4, 6) have different gloss degrees after hardening to the full polymerization degree.

Technical Field

The subject of the present invention is a process for the preparation of a multilayer matt coated surface on supports such as paper foils or plastic supports, in particular biaxially oriented polypropylene (BOPP), cast polypropylene (CPP) and polyvinyl chloride (PVC) and products comprising a multilayer matt coated surface on supports such as paper foils or plastic supports, in particular BOPP, CPP and PVC.

The invention can be applied to the preparation of furniture surfaces. It can also be used to provide structure in the preparation of melamine surfaces.

Background

The decorative coating material used on the surface of the furniture is a paper or plastic foil, which is not printed or printed by gravure, flexographic or digital printing or the like, and is covered with a colorless or colored coating.

Concave three-dimensionally coated surfaces, the structure of which is printed, for example, by means of special coatings with anti-adhesive properties, and convexities in which overprints of the structure are obtained by means of coatings with extenders or varnishes are known. Another division divides the surface into a synchronous surface, in which the three-dimensional structure reflects elements of the printed pattern, and an asynchronous surface, in which the three-dimensional structure does not reflect the printed pattern.

For practical reasons and considering the aesthetic preferences of the consumer, furniture manufacturers use boards with matte finishes (matte finish) to prepare furniture. The currently known technology allows to obtain a matte finish on a coated surface by using a coating with a matting agent, both water-based and EB (polymerization of coatings activated by electron beams) and UV (polymerization of coatings activated by ultraviolet rays).

Products from the company sautdoer (Schattdecor) are examples of suitable finishes of this type: uniform surface Smartfoil, three-dimensional concave Smartfoil Real and three-dimensional convex Smartfoil Evo and Smartfoil 3D. Matting agents (Matting agents) have a negative effect on the rheological properties of the coating and complicate the coating process, especially by deposition on the applicator device, for example on a paint roller. The use of matting agents in coatings for printing three-dimensional structures also limits the possibility of obtaining structures with a highly diversified screen ruling due to the large size of the matting particles. In practice, it is very difficult to reach the chemical and mechanical standards for furniture foils with gloss below 5 ° (when measured at 60 ° geometry).

There are known means for obtaining below 6 ° gloss on surfaces, which means expose a special type of UV or EB coating to an excimer lamp emitting light with a wavelength of 172 nm.

One method of preparing matte surfaces involves applying a layer of EB coating on the paper and treating it with an excimer lamp and then curing it to its maximum extent with an Electron Beam (EB). However, this method only allows to obtain a flat monolayer surface. No other layer can be applied to the hardened coating surface while ensuring the bond strength of these layers required in the furniture industry.

Disclosure of Invention

The object of the present invention was to develop a process for producing a multilayer three-dimensionally coated furniture surface, in which a layer of at least one coating is exposed to an excimer to render it matt without using a matting agent.

It was found that the application, excimer treatment and gelation process can be repeated by exposing the applied layer of the coating to light of wavelength 172nm and then gelifying and hardening it by partial EB or UV until the multiple layers of all the coatings are completely hardened (completely polymerized). The surface obtained meets the requirements of the furniture industry with regard to resistance to delamination and to liquid influences and mechanical resistance.

The essence of the invention is that the carrier is covered with a layer of coating which contains additives that increase the bonding strength of the coating between the layers. The coating is applied with a coating system. The applied layer of coating is then first exposed to excimer radiation having a wavelength of 172nm and then to an electron beam at a dose of 2 to 7 kGy. This is the dose required to obtain gelation of the coating. The level of gelation was determined by Fourier transform Infrared-test (FTIR-test) at a wavelength of 1191cm^-1When the total value of transmittance values for a dose range of 3-5 kGy is from 45% to 50%, and the wavelengths are approximately 2922 and 2878cm^-1The difference in transmittance between the two waves of (a) amounting to about 5%, or wherein the wavelength is about 1100cm^-1Has a transmittance value ratio of about 1160cm^-1The transmittance of the waves of (a) is lower. It is also possible to expose the coating to ultraviolet radiation (UV radiation) in order to obtain an equivalent gelling effect. After this treatment, a further layer of coating with an additive improving the bond strength is then applied onto the first layer and is also exposed to excimer radiation and electron beam or to ultraviolet radiation at the same dose as the first layer. If the second layer is the outer, last layer, the entire surface is exposed to a minimum dose of 35kGy of electron beam or equivalent UV radiation to complete the polymerization process for all of the coating layers. If the second layer is not the last layer, the second layer is exposed to excimer radiation and electron beam or to ultraviolet radiation only at the same dose as the first layer. Gelation of the coating, i.e. partial hardening thereofSo that the n-layer coating can be applied over the entire surface or a part of the entire surface. After complete polymerization at a wavelength of 1191cm^-1The transmittance value for a dose of 40kGy is more than 60%, and the wavelength is approximately 2922 and 2878cm^-1The difference in transmittance between the two waves of (2) amounts to about 10%, or the wavelength is about 1100cm^-1Has a transmittance value of about 1160cm^-1Is equal or higher than the transmittance of the waves of (a). This is helpful when selecting the additive that improves the adhesion strength of the coating from the group of additives based on micronized waxes based on very sensitive polyethylene with added propoxylated glycerol triacrylate.

It is also advantageous to subject the coating to electron beam treatment at a dose of 2kGy to 6kGy to ensure bond strength between the layers.

The desired structure may be obtained in-line (on-line) during one pass through the coater or printing and coater, or may be obtained off-line (i.e., using multiple machines or in multiple passes through one machine), but the in-line approach is better for the process.

The essence of the product comprising a multilayer coated surface is that it comprises at least one support covered with a multilayer matte coated surface obtained by one of the means described above, coated with at least one coating layer comprising an additive improving the surface properties of the coating layer in an amount of 5 to 30% by weight, ensuring the bonding strength between the layers. The three-dimensional effect of the furniture item is a result of the individual structures of the different layers.

It is advantageous if the carrier material is a paper or petroleum-based foil or a chemical foil or a wood-based board.

It is also advantageous if the support comprises a printed layer.

It is also advantageous if subsequent layers have different gloss levels after hardening to the extent of complete polymerization.

The subject matter of the invention is explained in the execution examples.

Drawings

Fig. 1 shows a cross section through a furniture foil with the effect obtained by a synchronized positive mould (synchronized positive mould) as described in example 1 a; while

FIG. 2 shows the effect obtained with an asynchronous male mold (asynchronous positive mold) as described in example 1 b;

fig. 3 depicts a cross section through a foil obtained by a negative mold with a synchronizing effect; and

FIG. 4 shows the same content with an asynchronous effect;

FIG. 5 presents a cross-section through a multilayer foil having an overprint on a carrier;

FIG. 6 presents a cross-section through a furniture foil obtained with a male mold, with two layers of coating of the chromatic effect provided by the unprinted paper; while

Fig. 7 shows a cross-section through such a foil with a three-layer coating.

Detailed Description

Example 1a male mold, synchronization effect

The foil preparation process is based on roll gravure printing. A wood-like design pattern 2 is applied to a carrier 1 made of paper foil. The design is transferred onto the web (band) by pressing the web against the printing cylinder with a special roller coated with rubber of sufficient hardness. The drum is immersed in a rotating toner container having a feed roller. Excess coating is removed by an adjustable doctor blade on the printing cylinder. The coated web is then dried in a hot air chamber and then transported to the next printing unit. The carrier passes through three print stations. The process is carried out using a water-soluble coating.

The next process is to apply a protective layer 3 on the carrier 1. This is achieved by special gravure cylinders (intaglio cylinder) which are used to apply the primer 3717.212. The roller was applied at about 6g/m²The primer of (1), which is similar to the paint, is hardened in a gas drier at a temperature of 140 ℃.

The next step is to apply a first EB coating 4 by a 3WS coating system. At this stage of the process, coating a had the following composition:

-FL 27692-1 parts

-FLE 27800-0.1 part

-FZ 2711-0.07 part

-FZ2720-0.15 parts

The gram weight obtained is 8g/m²Is exposed to an excimer lamp and then a preliminary polymerization process (gelation) is carried out in an EB generator of PCT company. The generator parameters are set as follows:

dose 5kGy

-high voltage 100kV

The surface obtained has a gloss measured at 60 ° geometry of less than 6 °.

The carrier web is then transported to a workstation having gravure cylinders with synchronized patterns of different elements for the primary design. Structure 6 was embossed using coating B consisting of:

-FLE 27800-1 parts

-FZ2720-0.15 parts

The surface was exposed to an excimer lamp and then hardened throughout the thickness of the multiple layers of all coatings by electrons in an EB generator. The hardening parameter values are:

40kGy dose

-high voltage 110kV

The cross-section of the obtained foil is presented in fig. 1, and the obtained foil provides a tactile impression (tactile impression) in addition to the visual effect of the embossed design. The "porous" structure associated with the different elements of the main design has a gloss of 1-2 ° measured at a 60 ° geometry.

The content (content) of the coating mixture in both application units is characterized by special additives which improve the bond strength between the individual layers. Another condition for obtaining good bond strength is that at the stage of the process of preparing the first matte surface coating, the coating is subjected to a prepolymerization (gelation) of the layer of coating.

Example 1b male die, asynchronous effect

The design and protective layer was applied to a carrier 1 consisting of a paper foil in the same way as presented in example 1 a.

The next step is to apply a first EB coating 4 by a 3WS coating system. In this part of the process, coating a had the following composition:

-FL 27692-1 parts

-FLE 27800-0.1 part

-FZ 2711-0.07 part

-FZ2720-0.15 parts

The gram weight obtained is 8g/m²Is exposed to an excimer lamp and then a preliminary polymerization process (gelation) is carried out in an EB generator of PCT company. The generator parameters are set as follows:

dose 5kGy

-high voltage 100kV

The surface obtained has a gloss measured at 60 ° geometry of less than 6 °.

The carrier web is then transported to a workstation with gravure cylinders having asynchronous patterns of different elements adapted to the primary design. Structure 6 was embossed using coating B consisting of:

-FLE 27800-1.0 parts

-FZ2720-0.15 parts

The surface was exposed to an excimer lamp and then hardened throughout the thickness of the multiple layers of all coatings by electrons in an EB generator. The hardening parameter values are:

40kGy dose

-high voltage 110kV

The cross section of the obtained foil is presented in fig. 2, which provides a tactile impression in addition to the visual effect of the embossed design. The "porous" structure, independent of the different elements of the main design, has a gloss of 1-2 ° measured at a 60 ° geometry.

The content of the coating mixture in both application units is characterized by special additives which improve the bond strength between the individual layers. Another condition for obtaining good bond strength is that at the stage of the process of preparing the first matte surface coating, the coating is subjected to a prepolymerization (gelation) of the layer of coating.

Example 2a negative mold, synchronization Effect

The design 2 and the protective layer 3 are applied to the carrier 1 consisting of a paper foil in the same way as presented in example 1 a.

The next step is to apply a first EB coating 4 by a 3WS coating system. In this part of the process, coating a had the following composition:

-FLE 27800-1.0 parts

-FZ2720-0.15 parts

The gram weight obtained is 8g/m²Is exposed to an excimer lamp and then subjected to a preliminary polymerization process (gelation) in an EB generator of PCT company. The generator parameters are set as follows:

4kGy dose

-high voltage 100kV

After this stage, a surface is obtained, which is characterized by a gloss of 1-2 ° measured at a geometry of 60 ° and a gloss of more than 8 ° measured at a geometry of 85 °.

The next step in the fabrication process is to apply the synchronization structure to the different elements of the main design.

The structure was embossed with a coating B6 consisting of:

-FL 27692-1 parts

-FLE 27800-0.1 part

-FZ 2711-0.07 part

-FZ2720-0.15 parts

The surface was exposed to an excimer lamp and then hardened throughout the thickness of the multiple layers of all coatings by electrons in an EB generator. The hardening parameter values are:

40kGy dose

-high voltage 110kV

The hardened coating applied with the gravure cylinder has a gloss of less than 6 ° measured at a 60 ° geometry. A cross-section of this type of foil is shown in fig. 3.

Example 2b female mold, asynchronous effect

The procedure was the same as in example 2a, with the following generator parameter settings for prepolymerization (gelation):

dose 5kGy

-high voltage 100kV

After this process, a surface is obtained, which is characterized by a gloss of 1-2 ° measured at a geometry of 60 ° and a gloss of more than 8 ° measured at a geometry of 85 °.

The next step in the manufacturing process is to apply the asynchronous structure 6 to the different elements of the main design.

The structure was applied using a coating B6 having the same composition as in example 2 a. The subsequent steps are also the same as in example 2 a. The gloss parameters of the resulting product were similar to those in example 2 a. A cross-section of this type of foil is shown in fig. 4.

Example 3 n layer coating

The procedure was the same as in example 1a, with the following generator parameter settings for the preliminary polymerization (gelation):

dose 3kGy

-high voltage 100kV

The surface obtained has a gloss measured at 60 ° geometry of less than 6 °.

The carrier web is then transported to a workstation having gravure cylinders with synchronized patterns of different elements adapted to the primary design. Structure 5 was applied using coating C consisting of:

-FLE 27800-1.0 parts

-FL 27692-1.0 parts

-FZ2720-0.15 parts

Will obtain a solution with a density of 3g/m²Exposed to an excimer lamp and then subjected to a preliminary polymerization process (gelation) in an EB generator from PCT company. The generator parameters are set as follows:

4kGy dose

-high voltage 100kV

The carrier web is then transported to the workstation together with the gravure cylinder. Structure 6 was embossed using coating B consisting of:

-FLE 27800-1.0 parts

-FZ2720-0.15 parts

The surface was exposed to an excimer lamp and then hardened with electrons in an EB generator throughout the thickness of the multiple layers of all coatings. The hardening parameter values are:

40kGy dose

-high voltage 110kV

The result is a three-dimensional structure with a matte effect. The corresponding cross section is shown in fig. 5.

Example 4a off-line printing, asynchronous, positive mold

In the same way as presented in example 1a, the design 2 and the protective layer 3 were applied to a carrier 1 consisting of a paper foil. In the following technical cycle, a first EB coating 4 was applied in the coater by a 3WS coating system.

In this part of the process, coating a had the following composition:

-FL 27692-1 parts

-FLE 27800-0.1 part

-FZ 2711-0.07 part

-FZ2720-0.15 parts

The gram weight obtained is 8g/m²Is exposed to an excimer lamp and then subjected to a preliminary polymerization process (gelation) in an EB generator of PCT company. The generator parameters are set as follows:

4kGy dose

-high voltage 100kV

The surface obtained has a gloss measured at 60 ° geometry of less than 6 °.

The carrier web is then transported to a station having an intaglio cylinder with patterns 6 that are asynchronous to the different elements of the main design. The structure was embossed with a coating B6 consisting of:

-FLE 27800-1.0 parts

FZ2720 to 0.05 part

The surface was exposed to an excimer lamp and then hardened throughout the thickness of the multiple layers of all coatings by electrons in an EB generator. The hardening parameter values are:

40kGy dose

-high voltage 110kV

The cross section of the obtained foil is presented in fig. 2, which provides a tactile sensation in addition to the visual effect of the embossed design. The "porous" structure, independent of the different elements of the main design, has a gloss of 1-2 ° measured at 60 ° geometry and a gloss of more than 8 ° measured at 85 ° geometry.

The content of the coating mixture in both application units is characterized by special additives which improve the bond strength between the individual layers. Another condition for obtaining good bond strength is that at the stage of the process of preparing the first matte surface coating, the coating is subjected to a prepolymerization (gelation) of the layer of coating.

Example 4b off-line printing, asynchronous negative mold

The design 2 and the protective layer 3 are applied to the carrier 1 consisting of a paper foil in the same way as presented in example 1 a. In the following technical cycle, a first EB coating 4 was applied in the coater by a 3WS coating system.

In this part of the process, coating a had the following composition:

-FLE 27800-1.0 parts

FZ2720 to 0.1 part

The gram weight obtained is 8g/m²The coating of (a) was exposed to an excimer lamp and then subjected to a preliminary polymerization process (gelation) in an EB generator of PCT company. The generator parameters are set as follows:

4kGy dose

-high voltage 100kV

The surface obtained after this process had a gloss of 1-2 ° measured at a 60 ° geometry and a gloss of more than 8 ° measured at an 85 ° geometry.

In the next off-line technical cycle, the asynchronous structure 6 is applied to the different elements of the wood-like design at another coating machine.

At this stage of the process, coating B6 had the following composition:

-FL 27692-1 parts

-FLE 27800-0.1 part

-FZ 2711-0.07 part

FZ2720 to 0.2 part

The surface was exposed to an excimer lamp and then hardened with electrons in an EB generator throughout the thickness of the multiple layers of all coatings. The hardening parameter values are:

40kGy dose

-high voltage 110kV

The layer of hardened coating applied with a gravure cylinder has a gloss of less than 6 ° measured at a 60 ° geometry. A cross-section of this type of foil is shown in fig. 4.

Example 5a off-line printing, Multi-layer, asynchronous, Male die

The procedure was the same as in example 4a, but coating A4 had the following composition:

-FL 27692-1.0 parts

-FLE 27800-0.1 part

-FZ 2711-0.07 part

-FZ2720-0.15 parts

The gram weight obtained is 8g/m²Is exposed to an excimer lamp and then a preliminary polymerization process (gelation) is carried out in an EB generator of PCT company. The generator parameters are set as follows:

dose 3kGy

-high voltage 100kV

The surface obtained has a gloss measured at 60 ° geometry of less than 6 °.

The carrier web is then transported to a workstation having gravure cylinders with asynchronous patterns of different elements adapted to the primary design. Structure 5 was coated with a coating C consisting of:

-FLE 27800-1.0 parts

-FL 27692-1.0 parts

-FZ2720-0.15 parts

The gram weight obtained is 3g/m²Is exposed to an excimer lamp and then a preliminary polymerization process (gelation) is carried out in an EB generator of PCT company. The generator parameters are set as follows:

4kGy dose

-high voltage 100kV

The carrier web is then transported to the workstation together with the gravure cylinder. Structure 6 was embossed using coating B consisting of:

-FLE 27800-1.0 parts

FZ2720 to 0.30 part

The surface was exposed to an excimer lamp and then hardened throughout the thickness of the multiple layers of all coatings by electrons in an EB generator. The hardening parameter values are:

40kGy dose

-high voltage 110kV

The final coating had a gloss of 1-2 ° measured at a 60 ° geometry.

The result is a three-dimensional matte structure, the cross-section of which can be seen in fig. 5.

Example 6 two layers without printing on the support

A protective base coat 3 consisting of a primer 3717.212 was applied to a support 1 consisting of a paper foil in the same way as described in example 1 a.

The next step is to apply a first EB coating 4 by a 3WS coating system. At this stage of the process, coating a had the following composition:

-FL 27692-1.0 parts

-FLE 27800-0.1 part

-FZ 2711-0.07 part

-FZ2720-0.15 parts

The gram weight obtained is 8g/m²Is exposed to an excimer lamp and then a preliminary polymerization process (gelation) is carried out in an EB generator of PCT company. The generator parameters are set as follows:

dose 5kGy

-high voltage 100kV

The surface obtained has a gloss measured at 60 ° geometry of less than 6 °.

The carrier web is then transported to the workstation together with the gravure cylinder. The structure was embossed with a coating B6 consisting of:

-FLE 27800-1.0 parts

-FZ2720-0.15 parts

The surface was exposed to an excimer lamp and then hardened throughout the thickness of the multiple layers of all coatings by electrons in an EB generator. The hardening parameter values are:

40kGy dose

-high voltage 110kV

The "porous" structure applied had a gloss of 1-2 ° measured at a 60 ° geometry. A cross-section of which is shown in figure 6.

Example 7 off-line coating without printed three layers on the support

A protective base coat 3 consisting of a primer 3717.212 was applied to a support 1 consisting of a paper foil in the same way as described in example 1 a.

The next step is to apply a first EB coating 4 by a 3WS coating system. At this stage of the process, coating a had the following composition:

-FL 27692-1.0 parts

-FLE 27800-0.1 part

-FZ 2711-0.07 part

-FZ2720-0.15 parts

The gram weight obtained is 10g/m²Is exposed to an excimer lamp and then a preliminary polymerization process (gelation) is carried out in an EB generator of PCT company. The generator parameters are set as follows:

dose 3kGy

-high voltage 100kV

The surface obtained has a gloss measured at 60 ° geometry of less than 6 °.

The carrier web is then transported to the workstation together with the gravure cylinder. Structure 5 was coated with a coating C consisting of:

-FLE 27800-1.0 parts

-FL 27692-1.0 parts

-FZ2720-0.15 parts

The gram weight obtained is 3g/m²Is exposed to an excimer lamp and then a preliminary polymerization process (gelation) is carried out in an EB generator of PCT company. The generator parameters are set as follows:

4kGy dose

-high voltage 100kV

In the next off-line technical cycle, the structure 6 is applied to the carrier web with a gravure cylinder at a workstation.

The structure was embossed with a coating B6 consisting of:

-FLE 27800-1.0 parts

-FZ2720-0.15 parts

The surface was exposed to an excimer lamp and then hardened throughout the thickness of the multiple layers of all coatings by electrons in an EB generator. The hardening parameter values are:

40kGy dose

-high voltage 110kV

The final coating had a gloss of 1-2 ° measured at a 60 ° geometry.

The result is a three-dimensional structure with a matte effect, the cross-section of which is shown in fig. 7.

Example 8 BOPP foil, Male die, synchronization Effect

The foil preparation process is based on web gravure printing. A wood-like design pattern 2 is applied to a carrier 1 consisting of a BOPP foil. The design is transferred to the web by pressing the web against the printing cylinder with a special roller coated with rubber of sufficient hardness. The drum is immersed into a rotating toner container by a feed roller. Excess coating is removed by an adjustable doctor blade on the printing cylinder. The coated strip is then dried by IR radiation and then transported to the next printing unit. The carrier passes through three print stations. The process is carried out using a water-soluble coating.

The next step is to apply a first EB coating 4 by a 3WS coating system. At this stage of the process, coating a had the following composition:

-FL 27692-1.0 parts

-FLE 27800-0.1 part

-FZ 2711-0.07 part

-FZ2720-0.15 parts

The gram weight obtained is 10g/m²Is exposed to an excimer lamp and then a preliminary polymerization process (gelation) is carried out in an EB generator of PCT company. The generator parameters are set as follows:

4kGy dose

-high voltage 100kV

The surface obtained has a gloss measured at 60 ° geometry of less than 6 °.

The carrier web is then transported to a workstation having gravure cylinders with synchronized patterns of different elements adapted to the primary design. The structure was embossed with a coating B6 consisting of:

-FLE 27800-1.0 parts

-FZ2720-0.15 parts

The surface was exposed to an excimer lamp and then hardened with electrons in an EB generator throughout the thickness of the multiple layers of all coatings. The hardening parameter values are:

40kGy dose

-high voltage 110kV

In addition to the visual effect of the embossed design, the obtained foil also provides a three-dimensional impression. The "porous" structure associated with the different elements of the main design has a gloss of 1-2 ° measured at a 60 ° geometry.

The content of the coating mixture in both application units is characterized by special additives which improve the bond strength between the individual layers. Another condition for obtaining good bond strength is that at the stage of the process of preparing the first matte surface coating, the coating is subjected to a prepolymerization (gelation) of the layer of coating.

Example 9 off-line printing, PML coating-rotodeco coater, Male die, asynchronous Effect

As in example 1a, a first EB coating 4 was applied by a DKR coating system onto a carrier 1 pre-embossed with a design 2 and treated with a primer 3717.2123. At this stage of the process, coating a had the following composition:

-FL 27692-1.0 parts

-FLE 27800-0.1 part

-FZ 2711-0.07 part

-FZ2720-0.15 parts

The gram weight obtained is 7g/m²Is exposed to an excimer lamp and then a preliminary polymerization process (gelation) is carried out in an EB generator of PCT company. The generator parameters are set as follows:

dose 5kGy

-high voltage 100kV

The surface obtained has a gloss measured at 60 ° geometry of less than 6 °.

The carrier strip is then placed again on the unwinder of a coater equipped with only one unit with an excimer device and EB. In the next cycle, the web is transported to a workstation having an intaglio cylinder with a pattern that is asynchronous to the different elements of the main design. The structure was embossed with a coating B6 consisting of:

-FLE 27800-1.0 parts

-FZ2720-0.15 parts

The surface was exposed to an excimer lamp and then hardened throughout the thickness of the multiple layers of all coatings by electrons in an EB generator. The hardening parameter values are:

40kGy dose

-high voltage 110kV

In addition to the visual effect of the embossed design, the obtained foil also provides a three-dimensional impression. The "porous" structure, independent of the different elements of the main design, has a gloss of 1-2 ° measured at a 60 ° geometry.

The content of the coating mixture in both application units is characterized by special additives which improve the bond strength between the individual layers. Another condition for obtaining good bond strength is that at the stage of the process of preparing the first matte surface coating, the coating is subjected to a prepolymerization (gelation) of the layer of coating.

Example 10 off-line digital embossing, Male die, asynchronous Effect

A first EB coating 4 was applied by a 3WS coating system onto a carrier 1 pre-embossed with the design 2 by a Palis digital printer (Palis digital printer) and treated with a primer 3717.2123. At this stage of the process, coating a had the following composition:

-FL 27692-1.0 parts

-FLE 27800-0.1 part

-FZ 2711-0.07 part

-FZ2720-0.15 parts

The gram weight obtained is 8g/m²Is exposed to an excimer lamp and then a preliminary polymerization process (gelation) is carried out in an EB generator of PCT company. The generator parameters are set as follows:

dose 5kGy

-high voltage 100kV

The surface obtained has a gloss measured at 60 ° geometry of less than 6 °.

The carrier web is then transported to a workstation having gravure cylinders with asynchronous patterns of different elements adapted to the primary design. The structure was embossed with a coating B6 consisting of:

-FLE 27800-1.0 parts

-FZ2720-0.15 parts

The surface was exposed to an excimer lamp and then hardened throughout the thickness of the multiple layers of all coatings by electrons in an EB generator. The hardening parameter values are:

40kGy dose

-high voltage 110kV

In addition to the visual effect of the embossed design, the obtained foil also provides a three-dimensional impression. The "porous" structure, independent of the different elements of the main design, has a gloss of 1-2 ° measured at a 60 ° geometry.

The content of the coating mixture in both application units is characterized by special additives which improve the bond strength between the individual layers. Another condition for obtaining good bond strength is that at the stage of the process of preparing the first matte surface coating, the coating is subjected to a prepolymerization (gelation) of the layer of coating.

List of reference numerals

1. Carrier (Carrier)

2. Impression layer (printed layer)

3. Protective layer (protective layer)

4. Layer of a first excimer coating A (first excimer coating layer A)

5. Layer C of the next excimer coating (next excimer coating layer C)

6. Layer B of the last excimer coating (last excimer coating layer B)