CN107286816B

CN107286816B - Light pressing film and preparation method and application thereof

Info

Publication number: CN107286816B
Application number: CN201710643202.1A
Authority: CN
Inventors: 胡健生
Original assignee: Guangdong Eko Film Manufacture Co ltd
Current assignee: Guangdong Eko Film Manufacture Co ltd
Priority date: 2017-07-31
Filing date: 2017-07-31
Publication date: 2020-04-07
Anticipated expiration: 2037-07-31
Also published as: CN107286816A

Abstract

The invention relates to a calendaring film and a preparation method and application thereof. The calendaring film comprises a film base layer and a glazing layer arranged on the film base layer, wherein the raw material of the glazing layer is UV paint which comprises the following components: the epoxy acrylate resin comprises, by weight, 70% -80% of epoxy acrylate resin, 5% -10% of styrene, 3% -5% of photoinitiator and 6% -15% of auxiliary. The calendaring film has high calendaring efficiency and low cost for digital presswork.

Description

Light pressing film and preparation method and application thereof

Technical Field

The invention relates to the technical field of printing, in particular to a calendaring film and a preparation method and application thereof.

Background

In order to increase the brightness and scratch resistance of the prints, the prints are usually subjected to a surface calendering treatment. The traditional press polishing treatment of the surface of the printed matter is to coat UV coating on the surface of the printed matter and then use a light curing device to cure and form the printed matter. However, the conventional surface calendering of printed matter is inefficient and costly.

Disclosure of Invention

Based on the above, there is a need for a calendering film with high efficiency and low cost for surface calendering of printed products, and a preparation method and application thereof.

The calendaring film comprises a film base layer and a glazing layer arranged on the film base layer, wherein the raw material of the glazing layer is UV paint which comprises the following components: the epoxy acrylate resin comprises, by weight, 70% -80% of epoxy acrylate resin, 5% -10% of styrene, 3% -5% of photoinitiator and 6% -15% of auxiliary.

In one embodiment, the auxiliary agent comprises a leveling agent, a whitening agent and a brightening agent, wherein the leveling agent accounts for 2-5% by weight, the whitening agent accounts for 2-5% by weight, and the brightening agent accounts for 2-5% by weight.

In one embodiment, the epoxy acrylate resin is 75-80 wt%, the styrene is 8-10 wt%, the leveling agent is 2-4 wt%, the whitening agent is 2-4 wt%, and the brightening agent is 2-3 wt%.

In one embodiment, the epoxy acrylate resin is 80 wt%, the styrene is 10 wt%, the photoinitiator is 3 wt%, the leveling agent is 2 wt%, the whitening agent is 2 wt%, and the brightening agent is 3 wt%.

In one embodiment, the film substrate is a polyester film layer, a polypropylene film layer, a nylon film layer or a polyethylene film layer.

In one embodiment, the thickness of the glazing layer is 1 μm to 5 μm.

The calendaring film in the technical scheme comprises a film base layer and a glazing layer arranged on the film base layer, wherein the raw material of the glazing layer is UV coating, and the UV coating comprises epoxy acrylate resin, styrene, a photoinitiator and an auxiliary agent. By controlling the weight percentages of the epoxy acrylate resin, the styrene, the photoinitiator and the auxiliary agent in the UV coating, the glazing layer has better glossiness and mechanical strength. The epoxy acrylic resin is high in curing speed and good in strength, the styrene is used as an active diluent and can be well dissolved, and the styrene can promote the epoxy acrylic resin to be cured into a film. The epoxy acrylic resin and the styrene react together, and the intermolecular binding force is stronger, so that the formed glazing layer has better mechanical glossiness and mechanical strength. In addition, the UV coating is coated on the film base layer, the film base layer can prevent permeation, a light pressing layer is more easily formed on the surface of the film base layer, and the preparation efficiency is higher.

The press polish film can complete press polish treatment on the surface of a printed matter through film covering, and is simple and convenient to operate and high in processing efficiency compared with the press polish of the traditional printed matter surface coating UV coating. In addition, the calendering film has better wear resistance and hardness, and the surface of the calendering film is smooth and flat. The calendering film can be peeled from the printed matter after the lamination is finished, and can be repeatedly used, so that the cost of the calendering treatment on the surface of the printed matter is obviously reduced.

In addition, a preparation method of the light pressing film is also needed to be provided.

A preparation method of a light pressing film comprises the following steps:

mixing epoxy acrylate resin, styrene, a photoinitiator and an auxiliary agent to prepare the UV coating, wherein the weight percentage of the epoxy acrylate resin is 70-80%, the weight percentage of the styrene is 5-10%, the weight percentage of the photoinitiator is 3-5% and the weight percentage of the auxiliary agent is 6-15%;

and coating the UV coating on the film base layer, and curing and forming to obtain the light pressing film.

In one embodiment, the method further comprises the step of performing corona treatment on the surface of the film base layer.

In one embodiment, the UV coating applied to the film base layer is cured and formed by ultraviolet light irradiation.

The preparation method of the matte film is simple, high in efficiency and convenient for industrial production.

In addition, the application of the calendering film for calendering the surface of the digital printed product is also provided.

And laminating the press polish film on the surface of the printed matter, and laminating the digital carbon powder on the surface of the printed matter by the polish layer of the press polish film to form a high-glossiness, flat, smooth and clean surface, thereby finishing the press polish treatment on the surface of the printed matter. And peeling the light pressing film from the surface of the printed matter for the next use. The method for carrying out calendaring treatment on the surface of the printed matter by using the calendaring film is simple and convenient, and has high preparation efficiency and low preparation cost.

Drawings

Fig. 1 is a schematic structural diagram of a digital optical film according to an embodiment.

Description of reference numerals:

10. a light pressing film; 100. a film base layer; 200. and (3) a glazing layer.

Detailed Description

To facilitate an understanding of the invention, the invention will now be described more fully with reference to the accompanying drawings. Preferred embodiments of the present invention are shown in the drawings. This invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.

It will be understood that when an element is referred to as being "secured to" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.

Test methods not specifically identified in the following examples were selected according to conventional methods and conditions, or according to adjustments suggested in the commercial specifications. The reagents or instruments used are not indicated by the manufacturer, and are conventional products available commercially.

In the embodiment shown in FIG. 1, the calendered film 10 comprises a film base 100 and a glazing layer 200 disposed on the film base 100.

The film base layer 100 is a polyester film layer, a polypropylene film layer, a nylon film layer, a polyethylene film layer, or the like. Optionally, the film base layer 100 is a biaxially oriented polyester film layer, a cast polypropylene film layer, or a biaxially oriented nylon film layer. The thickness of the film base layer 100 can be adjusted according to actual processing requirements.

The raw material of the glazing layer 200 is a polyurethane ultraviolet light curing coating (UV coating), and the UV coating comprises the following components: epoxy acrylate resin, styrene, a photoinitiator and an auxiliary agent. The epoxy acrylate resin is a basic framework in the UV coating, can form a coating with a three-dimensional structure, and endows the coating with better mechanical property and high gloss. The styrene can be used as an active diluent to dissolve solid components in the paint, the viscosity of a mixed system is adjusted, the styrene also participates in the reaction of a curing film-forming process, and the styrene is crosslinked and polymerized with the epoxy acrylate resin, so that the coating is further promoted to have better mechanical performance and high gloss. The photoinitiator is used for transmitting the energy of ultraviolet photons, can initiate the cross-linking polymerization of each component in the coating, and promotes the liquid-solid conversion process of the system. The photoinitiator in the present invention is not particularly limited, and the commonly used photoinitiators can satisfy the performance requirements.

The auxiliary agent is used for improving the performance of the UV coating, and auxiliary components can be selected according to the specific use requirement of the coating and the required coating performance. Such as leveling agents, defoaming agents, base lubricants, matting agents, dispersing agents, stabilizers, surface slip agents, and the like. In one embodiment, the additives include leveling agents, whitening agents, and brighteners. The leveling agent, the whitening agent and the brightening agent are not particularly limited as long as the use requirements of the coating can be met.

The UV coating formed by mixing the components has small environmental pollution and high curing efficiency, and the generated coating has better mechanical property and high glossiness.

The weight percentage of the epoxy acrylate resin is 70% to 80%, and may be, for example, but not limited to, 70%, 72%, 74%, 75%, 76%, 78%, or 80%. The weight percentage of styrene is 5% to 10%, and may be, for example, but not limited to, 5%, 6%, 7%, 8%, 9%, or 10%, etc. The photoinitiator may be present in an amount of 3% to 5% by weight, for example, but not limited to, 3%, 4%, or 5%, etc. And the weight percentage of the auxiliary agent is 6-15%, for example, but not limited to 6%, 8%, 10%, 12%, 14% or 5%. The sum of the weight percentages of the epoxy acrylate resin, the styrene, the photoinitiator and the auxiliary agent in the UV coating is 100%.

In one embodiment, the additives include leveling agents, whitening agents, and brighteners. The weight percentage of the leveling agent is 2% to 5%, for example, but not limited to, 2%, 3%, 4%, or 5%. The whitening agent is present in an amount of 2% to 5% by weight, and may be, for example, but not limited to, 2%, 3%, 4%, or 5%. And the brightener may be, for example, but not limited to, 2% to 5% by weight, such as 2%, 3%, 4%, or 5%.

In one embodiment, the epoxy acrylate resin is 75-80 wt%, the styrene is 8-10 wt%, the leveling agent is 2-4 wt%, the brightener is 2-4 wt%, and the brightener is 2-3 wt%.

In one embodiment, the epoxy acrylate resin is 80% by weight, the styrene is 10% by weight, the photoinitiator is 3% by weight, the leveling agent is 2% by weight, the brightener is 2% by weight, and the brightener is 3% by weight.

In one embodiment, the thickness of the glazing layer 200 is 1 μm to 5 μm. By controlling the thickness of the glazing layer 200, the glazing layer 200 is ensured to have better glossiness and mechanical strength, and surface calendering treatment can be better carried out on printing.

The calendering film 10 in the above technical solution includes a film base layer 100 and a glazing layer 200 disposed on the film base layer 100, where a raw material of the glazing layer 200 is a UV coating, and the UV coating includes an epoxy acrylate resin, styrene, a photoinitiator, and an auxiliary agent. By controlling the weight percentages of the epoxy acrylate resin, styrene, photoinitiator, and adjuvants in the UV coating, the glazing layer 200 has better gloss and mechanical strength.

The epoxy acrylic resin is high in curing speed and high in strength, the styrene is used as an active diluent and can be well dissolved, and the styrene can promote the epoxy acrylic resin to be cured into a film. The epoxy acrylic resin with the weight percentage of 70-80 percent and the styrene with the weight percentage of 5-10 percent are subjected to cross-linking polymerization, the bonding force between molecules is strong, and the formed glazing layer 200 can be ensured to have good mechanical strength and glossiness. In addition, the UV coating is coated on the film base layer 100, and the film base layer 100 can prevent permeation, so that a lamination layer is more easily formed on the surface thereof, and the preparation efficiency is higher.

This press polish membrane 10 just can accomplish the press polish processing of printed matter surface through the tectorial membrane, for traditional printed matter surface coating UV coating and through photocuring equipment press polish processing, its easy and simple to handle, machining efficiency is high, and the cost is lower. In addition, the calendered film 10 has better wear resistance and hardness, and the surface thereof is smooth and flat. The calendaring film 10 can be peeled from the surface of the printed matter after the film covering is finished, and can be repeatedly used, thereby further reducing the cost of calendaring the surface of the printed matter.

In addition, it is necessary to provide a method for producing the calendered film 10.

The preparation method of the calendered film 10 comprises the following steps:

1) epoxy acrylate resin, styrene, a photoinitiator and an auxiliary agent are mixed to prepare the UV coating, wherein the weight percentage of the epoxy acrylate resin is 70-80%, the weight percentage of the styrene is 5-10%, the weight percentage of the photoinitiator is 3-5% and the weight percentage of the auxiliary agent is 6-15%.

In one embodiment, the components are respectively prepared according to the weight percentage, epoxy acrylate resin is firstly added into a container, then styrene is added for dilution, a stirrer is used for stirring, after the mixture is uniformly stirred, a photoinitiator, a leveling agent, a brightening agent and a whitening agent are sequentially added, and the stirring is continued until the solution is not layered, so that the UV coating is obtained.

2) And coating the UV coating on the film base layer 100, and curing and forming to obtain the calendaring film 10. Optionally, the surface of the film base 100 is corona treated prior to application of the UV coating. Optionally, the UV coating applied on the surface of the film base layer 100 is cured and set by irradiation of an ultraviolet lamp.

In one embodiment, the surface of the film base layer 100 is subjected to corona treatment, a wet coater is used to coat the UV coating on the surface of the film base layer 100 by means of roller coating, and a light curing device is used to rapidly cure and shape the UV coating to form the glazing layer 200, so as to obtain the light pressing film 10. And finally, rolling and placing the calendaring film 10 for standby.

The preparation method of the matte film 10 is simple, high in efficiency and convenient for industrial production.

In addition, there is also an application of providing a press finishing process for the surface of a digital printed matter using the above press finishing film 10.

The press polish film 10 is covered on the surface of the printed matter, and the glazing layer 200 of the press polish film 10 enables the printed matter to form a high-glossiness, flat, smooth and clean surface by impressing digital carbon powder on the surface of the printed matter, so that the press polish treatment on the surface of the printed matter is completed. Since the glazing layer 200 of the calendering film 10 has wear resistance and high hardness, and the surface is smooth and flat, the calendering film 3 can be peeled off from the surface of the printed matter, and the calendering film 10 can be reused for many times.

In one embodiment, the glazing layer 200 of the calendered film 10 is applied to the surface of the digital printed matter by heating and pressing through a laminator. Wherein the heating temperature is 60-80 ℃, and the pressurizing pressure is not more than 5 Mpa. Because the digital carbon powder ink has thermoplasticity, the carbon powder ink is melted under the action of the temperature and the pressure of the laminating machine heating roller, and the carbon powder ink can be completely attached to the glazing layer 200 of the laminating film 10. Because the glazing layer 200 has a high glossiness, a high brightness, and a smooth surface, the digital carbon powder on the surface of the printed matter can be correspondingly imprinted into a high glossiness, a high brightness, and a smooth shape. After the printed matter leaves the laminating machine heating roller, along with the reduction of the temperature, the digital carbon powder on the printed matter is cooled and shaped, the surface shape is formed, and the press polishing treatment of the surface of the printed matter is completed. After the calendering process is completed, the calendered film 10 is peeled off from the surface of the printed matter and is reserved for the next use.

The method for carrying out calendaring treatment on the surface of the printed matter by using the calendaring film 10 is simple and convenient, and has high preparation efficiency and low preparation cost.

The following are specific examples

Example 1: production of a light-laminating film 1

1) According to the weight percentage, 70 percent of epoxy acrylate resin, 10 percent of styrene, 5 percent of photoinitiator, 3 percent of flatting agent, 3 percent of brightening agent and 4 percent of brightening agent are taken. Firstly, adding epoxy acrylate resin into a container, then adding styrene for dilution, stirring by using a stirrer, after uniformly stirring, sequentially adding a photoinitiator, a leveling agent, a brightening agent and a whitening agent, and continuously stirring until the solution is not layered, thus obtaining the UV coating.

2) Firstly, the surface of the polyester film layer is processed by corona process.

3) And coating the UV coating on the surface of the polyester film layer in a roll coating mode by using a wet coating machine, and quickly curing and shaping the UV coating by using light curing equipment to form a glazing layer to obtain the light pressing film 1. And finally, rolling and placing the calendaring film 1 for later use.

Example 2: preparation of the Bright laminating film 2

1) According to the weight percentage, 80 percent of epoxy acrylate resin, 5 percent of styrene, 3 percent of photoinitiator, 5 percent of flatting agent, 4 percent of brightening agent and 3 percent of brightening agent are prepared. Firstly, adding epoxy acrylate resin into a container, then adding styrene for dilution, stirring by using a stirrer, after uniformly stirring, sequentially adding a photoinitiator, a leveling agent, a brightening agent and a whitening agent, and continuously stirring until the solution is not layered, thus obtaining the UV coating.

2) Firstly, the surface of the polypropylene film layer is processed by corona process.

3) And coating the UV coating on the surface of the polypropylene film layer in a roller coating mode by using a wet coating machine, and quickly curing and shaping the UV coating by using light curing equipment to form a glazing layer to obtain the glazing film 2. And finally, rolling and placing the calendaring film 2 for later use.

Example 3: preparation of a Bright film 3

1) According to the weight percentage, 80 percent of epoxy acrylate resin, 10 percent of styrene, 3 percent of photoinitiator, 2 percent of flatting agent, 2 percent of brightening agent and 3 percent of brightening agent are prepared. Firstly, adding epoxy acrylate resin into a container, then adding styrene for dilution, stirring by using a stirrer, after uniformly stirring, sequentially adding a photoinitiator, a leveling agent, a brightening agent and a whitening agent, and continuously stirring until the solution is not layered, thus obtaining the UV coating.

3) And coating the UV coating on the surface of the polyester film layer in a roll coating mode by using a wet coating machine, and quickly curing and shaping the UV coating by using light curing equipment to form a glazing layer to obtain the light pressing film 3. And finally, rolling and placing the calendaring film 3 for later use.

Example 4: preparation of the Bright laminating film 4

1) According to the weight percentage, 75 percent of epoxy acrylate resin, 8 percent of styrene, 5 percent of photoinitiator, 5 percent of leveling agent, 5 percent of brightening agent and 2 percent of brightening agent are taken. Firstly, adding epoxy acrylate resin into a container, then adding styrene for dilution, stirring by using a stirrer, after uniformly stirring, sequentially adding a photoinitiator, a leveling agent, a brightening agent and a whitening agent, and continuously stirring until the solution is not layered, thus obtaining the UV coating.

2) Firstly, the surface of the polyethylene film layer is processed by corona process.

3) And coating the UV coating on the surface of the polyethylene film layer in a roller coating mode by using a wet coating machine, and quickly curing and shaping the UV coating by using light curing equipment to form a glazing layer to obtain the glazing film 4. And finally, rolling and placing the calendaring film 4 for later use.

EXAMPLE 5 calendering of digital prints

The glazing layer of the calendered film 3 prepared in example 3 was laminated on the surface of the digital printed matter using a laminating machine. Wherein the heating temperature of the film laminating machine is 70 ℃, and the pressurizing pressure is 3 Mpa. Because the digital carbon powder ink has thermoplasticity, the carbon powder ink is melted under the action of the temperature and the pressure of the laminating machine heating roller, and the carbon powder ink can be completely attached to the glazing layer of the laminating film 3. The glazing layer of the glazing film 3 has high glossiness, high brightness and a smooth and clean surface, so that the digital carbon powder on the surface of the printed matter can be correspondingly imprinted into a high glossiness, high brightness and a smooth and clean form. After the printed matter leaves the laminating machine heating roller, along with the reduction of the temperature, the digital carbon powder on the printed matter is cooled and shaped, the surface shape is formed, and the press polishing treatment of the surface of the digital printed matter is completed. Because the glazing layer of calendering film 3 has wear-resisting and high rigidity, and the surface is smooth and level, can peel off calendering film 3 from the printed matter surface through the coiling mechanism of laminating machine, remain to wait for the next use.

Compared with the UV treatment of the surface of the printed matter in the prior art, the calendering film 10 in the invention can complete the calendering treatment of the surface of the printed matter only by simple film covering. The calendered film 10 can form the apparent effect of high glossiness and high brightness on the surface of a digital printed product, and the apparent effect is the same as the effect of surface UV treatment. However, by using the calendering film 10 to perform calendering, the process is simple, the use of a photocuring device is avoided, the UV coating is not cured, the processing efficiency is effectively improved, and the processing cost is reduced. In addition, the glazing layer 200 of the calendered film 10 has wear resistance and high hardness, the surface is smooth and flat, and the calendered film 10 can be peeled from the surface of a printed matter. The calendaring film 10 can be repeatedly used for many times, the surface calendaring treatment effect of the digital printed matter is not influenced, and the use cost is further reduced.

Therefore, the calendering film 10 has high calendering efficiency and low cost for the digital printed products.

The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.

The above-mentioned embodiments only express several embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.

Claims

1. The application of the calendering film to the calendering treatment of the surface of the digital printed matter is characterized by comprising the following steps:

covering a glazing layer of a glazing film on the surface of a digital printed matter, carrying out glazing processing under a heating condition, and stripping the glazing film from the surface of the digital printed matter after the glazing processing is finished;

wherein, the surface of the digital printed matter is provided with digital carbon powder ink;

the light pressing film comprises a film base layer and a light coating layer arranged on the film base layer, wherein the film base layer is a polyester film layer, a polypropylene film layer, a nylon film layer or a polyethylene film layer;

the raw material of the glazing layer is UV coating, the glazing layer is formed by curing the UV coating, and the UV coating comprises the following components: the coating comprises epoxy acrylate resin, styrene, a photoinitiator and an auxiliary agent, wherein the weight percentage of the epoxy acrylate resin is 70-80%, the weight percentage of the styrene is 5-10%, the weight percentage of the photoinitiator is 3-5%, and the weight percentage of the auxiliary agent is 6-15%; the auxiliary agent comprises a leveling agent, a whitening agent and a brightening agent, wherein the weight percentage of the leveling agent is 2% -5%, the weight percentage of the brightening agent is 2% -5% and the weight percentage of the brightening agent is 2% -5%.

2. The use according to claim 1, wherein the weight percentage of the epoxy acrylate resin is 75-80%, the weight percentage of the styrene is 8-10%, the weight percentage of the leveling agent is 2-4%, the weight percentage of the brightener is 2-4% and the weight percentage of the brightener is 2-3%.

3. The use according to claim 2, wherein the weight percentage of the epoxy acrylate resin is 80%, the weight percentage of the styrene is 10%, the weight percentage of the photoinitiator is 3%, the weight percentage of the leveling agent is 2%, the weight percentage of the brightener is 2% and the weight percentage of the brightener is 3%.

4. Use according to any one of claims 1 to 3, wherein the thickness of the glazing layer is from 1 μm to 5 μm.

5. Use according to any one of claims 1 to 3, wherein the process for the preparation of the brightness enhancement film comprises the steps of: mixing the epoxy acrylate resin, the styrene, the photoinitiator and the auxiliary agent to prepare the UV coating;

6. The use of claim 5, further comprising the step of corona treating the surface of the film substrate.

7. The use according to claim 6, wherein the UV coating applied to the film substrate is cured by UV light.