CN212499573U

CN212499573U - Gravure online printing structure for black high-brightness composite paper

Info

Publication number: CN212499573U
Application number: CN202020941898.3U
Authority: CN
Inventors: 易元锋; 何承鹏; 蒋立
Original assignee: Guizhou Jinjia New Packaging Material Co ltd
Current assignee: Guizhou Jinjia New Packaging Material Co ltd
Priority date: 2020-05-29
Filing date: 2020-05-29
Publication date: 2021-02-09
Anticipated expiration: 2030-05-29

Abstract

The utility model discloses a high bright light transparent film black composite paper gravure allies oneself with line printing structure of aluminizing, including back of the body coating, white card bottom, press polish coating layer, compound glue layer, aluminize layer, black layer, PET high bright light rete and printing layer from the bottom up, the printing method is: performing double-sided corona treatment on a PET high-brightness transparent film, precoating a black bottom layer on the reverse side, compounding the PET high-brightness transparent film with base paper subjected to surface coating and calendaring treatment by vacuum aluminizing, simultaneously performing thickening and back coating treatment on the composite paper, and sending the composite paper into gravure equipment for online gravure printing to finally obtain the packaging material. The utility model discloses a novel packaging material, black PET aluminizes the black layer of compound paper in PET membrane the inside, and black layer structure can obtain the protection of PTE membrane, and is wear-resisting resistant scraping, avoids producing during the operation to scrape flower, brace etc. can not influence the processing operation in later stage.

Description

Gravure online printing structure for black high-brightness composite paper

Technical Field

The utility model belongs to the technical field of the packing printing, a black highlight compound paper gravure on-line printing structure is related to.

Background

The high-light-transmission PET composite film is a novel packaging material, has excellent physical and chemical properties, dimensional stability and transparency, and is widely applied to the fields of magnetic recording, photosensitive materials, electronics, electrical insulation, industrial films, packaging decoration, screen protection, optical mirror surface protection and the like. The high-light-transmission PET composite film is commonly used as an automobile anti-explosion adhesive film, a mobile phone and tablet personal computer adhesive film and the like in daily life, but is rarely applied to small paper packaging printed matters, mainly because the process for compounding the high-light-transmission PET composite film with paper is complex and the production cost is high.

At present, common black PET aluminized composite paper on the market is mainly prepared by directly compounding white cardboard and PET aluminized paper, then performing ground color printing on the surface of a PET film (or compounding the PET aluminized film after printing black on the front surface of the PET film), so as to obtain black composite paper required by customers, and finally performing finishing processing such as printing, gold stamping and the like on the black composite paper, wherein a black layer on the paper surface cannot be protected by the PET film, and scraping, drawing and the like are easily generated during operation, so that the subsequent processing operation is influenced.

Disclosure of Invention

The to-be-solved technical problem of the utility model is: the black layer of the gravure printing structure of the black high-brightness composite paper is arranged in the PET film, so that the product is wear-resistant and scratch-resistant.

The utility model discloses the technical scheme who takes does: a gravure line-connecting printing structure of high-brightness transparent film black aluminized composite paper comprises a back coating, a white card bottom layer, a calendaring coating layer, a composite glue layer, an aluminized layer, a black layer, a PET high-brightness film layer and a printing layer from bottom to top.

A high-brightness transparent film black aluminized composite paper gravure line printing structure printing method comprises the following steps: the back surface of a PET high-brightness transparent film after double corona is precoated with a layer of black ground color, the PET high-brightness transparent film is firstly aluminized by vacuum and then is compounded with backing paper subjected to surface coating and calendaring treatment, and the novel packaging material with a multilayer structure and a high-brightness mirror surface effect is obtained.

A printing method of a gravure online printing method of high-brightness transparent film black aluminized composite paper specifically comprises the following steps:

(1) carrying out double-sided corona treatment on the PET high-brightness transparent film;

(2) coating and coloring the product prepared in the step (1);

(3) vacuum aluminizing is carried out on the product prepared in the step (2);

(4) coating and sizing the product prepared in the step (3) in a ceramic anilox roller mode;

(5) carrying out surface coating and calendaring treatment on the white card of the winding drum planned for compounding;

(6) performing composite treatment on the products prepared in the step (4) and the step (5);

(7) carrying out thickening back coating treatment on the product prepared in the step (6);

(8) and (5) carrying out gravure on-line printing processing on the product prepared in the step (7), and drying to obtain a final printed product.

Preferably, the thickness of the PET bright high-transparency film is 21 μm, the viscosity of the adopted glue is 65 +/-5S, and the solid content is more than or equal to 55%.

Preferably, the ceramic anilox roller is adopted for gluing, the number of the screen lines of the anilox roller is 70 lines, the depth of the screen holes is 35-45 mu m, and then the processing and shaping are completed through laser engraving.

Preferably, the white card composite paper base paper is 200 g/square meter.

Preferably, the number of holes and lines of the back coating roller used in the printing is 90 lines, the depth is 30um, the solid content of the back coating used is 55%, and the viscosity is 20S.

The utility model has the advantages that: compared with the prior art, the utility model discloses a black layer of black PET compound paper of aluminizing is in PET membrane the inside, the black layer structure can obtain the protection of PTE membrane, wear-resisting resistant scraping, avoid producing during the operation and scrape the flower, the brace etc., can not influence the processing operation in later stage, and can realize paper processing and printing in step, save manufacturing procedure, through setting up coating calendering layer to the white card reel paper face, promote the planarization on paper surface, guarantee compound fastness and the mirror surface luminance after the complex, handle in order to reach the function of waterproof lock water through thickening back coating, guarantee not absorbing water (or the desiccation) after the complex and cause the product to warp.

Drawings

FIG. 1 is a schematic view of a gravure on-line printing structure of a high-brightness transparent film black aluminized composite paper;

fig. 2 is a flow chart of a printing method.

Detailed Description

The invention will be further described with reference to specific embodiments.

Example 1: as shown in fig. 1, a gravure line printing structure of black aluminized composite paper with a high-brightness transparent film comprises a back coating layer 2, a white card bottom layer 2, a press polish coating layer 3, a composite glue layer 4, a vacuum aluminized layer 5, a black layer 6, a PET high-brightness film layer 7 and a printing layer 8 from bottom to top.

Example 2: as shown in fig. 2, a printing method of a gravure on-line printing structure of a high-brightness transparent film black aluminized composite paper comprises the following steps: the back surface of the PET high-brightness transparent film is precoated with a layer of black ground color, and the PET high-brightness transparent film is firstly aluminized through vacuum and then compounded with the backing paper subjected to surface coating and calendaring treatment to obtain the novel packaging material with a multilayer structure and a high-brightness mirror surface effect.

The common production mode in the packaging and printing industry at present is as follows: the paper making enterprise utilizes the professional compounding machine to produce the compound paper of aluminizing, and the printing enterprise purchases the finished product paper outward and prints. Due to the limitation of production equipment, a printing enterprise is difficult to jump out of the conventional process thought nest. The utility model discloses the equipment of well adoption is the sailuodi R960 gravure unit, and sailuodi R960 gravure unit is that the internal first set of collection is compound, shift, ordinary printing, UV rotates the gravure equipment of printing in an organic whole. The advantages of the Serudina device are fully utilized, the traditional mode that the printing and the papermaking industry are finished by division is changed, after the aluminized composite paper material is manufactured, the aluminized composite paper material can be directly connected to enter a gravure production link or be provided for offset printing equipment to be printed, the extension of a printing enterprise to the upstream of an industrial chain is realized, the process flow is shortened, and the production cost is effectively reduced. As shown in fig. 2, a printing method of a gravure on-line printing method of a black aluminized composite paper with a high-brightness transparent film specifically includes the following steps:

(2) coating and coloring the product prepared in the step (1);

(3) vacuum aluminizing is carried out on the product prepared in the step (2);

The stability of the aluminized composite paper before printing is always a headache problem in the industry, and the requirements on transportation and storage of the vacuum aluminized paper material are strict at present: plastic films are used for protection in the transportation process, and the plastic films are stored in storehouses with constant temperature and humidity conditions in the aspect of storage. The production of the aluminum film paper raw material is realized by utilizing gravure equipment, and the difficult problems in the links of purchasing, detecting, transporting and storing the materials are solved.

The transfer compounding process is completed on the gravure equipment, so that the equipment can be used as a professional paper compounding transfer machine in the neutral period of printing production, and the equipment is utilized to the maximum extent. Because the production efficiency of gravure production equipment is obviously higher than the production efficiency of offset printing, gold stamping and other post-printing process equipment, a larger promotion space exists in the aspect of equipment utilization rate. The utilization rate of the Siroudi gravure equipment can be improved by about 10 to 20 percent on the prior level.

The printing structure and the printing method have the following advantages:

(1) the back surface of the PET highlight transparent film is precoated with a layer of black ground color, firstly, the PET highlight transparent film is aluminized through vacuum, and then the PET highlight transparent film is compounded with the ground paper subjected to surface coating and calendaring treatment, so that the novel packaging material with a multilayer structure and a highlight mirror effect is obtained, a black layer of the black PET aluminized composite paper is arranged in the PET film, the black layer structure can obtain the protection of the PTE film, and is wear-resistant and scratch-resistant, the generation of scraping patterns, pulling strips and the like during operation is avoided, the later-stage processing operation cannot be influenced, and the black layer is applied to high-grade cigarette label printing production for the first time in China, so that the PET highlight transparent film is attractive and elegant, and has. Through the implementation of the printing structure and the printing method, the layout design of 'noble smoke (crossover)' product 'classic pure black' obtains unique visual effect, and plays a positive role in expanding sales and enhancing competitiveness of the product. Meanwhile, printing enterprises further enrich the technical expression forms of the gravure process, provide a wider creative space for product design, and are beneficial to improving the technical level of special printing processes in the cigarette label printing industry; the paper processing and printing are synchronously realized, and the processing procedure is saved;

(2) the printing method can reduce the raw material purchase cost by about 3500 yuan/ton, can arrange production at any time to meet the production requirement, and is not required to be limited by market price change and supply conditions;

(3) the PET high brightness film is subjected to double-sided corona treatment in advance, so that double-sided printing is met;

the thickness of the used PET bright high-transparency film is 21 mu m, and is about 1 to 1.5 times thicker than the thickness of the conventional PET composite film with the thickness of 12 to 16 mu m, so that the requirement on the adhesive force of a composite glue layer is very high, and if insufficient or uneven gluing occurs in production, the problem of reverse drawing of printing (die cutting) can be caused, and the stability of the printing quality of a finished product is influenced. By adopting the technical scheme that the viscosity of the composite glue is 65 +/-5S, the solid content is more than or equal to 55 percent, and the coating weight is more than or equal to 6 g/m (wet coating weight), the requirements of composite line gravure printing can be met, and no color burst phenomenon occurs when the impression of a gravure product is positively folded for 10 times at 90 degrees;

(4) by coating and calendaring the paper surface of the white card roll paper, the smoothness of the paper surface is improved, and the compounding fastness and the brightness of the compounded mirror surface are ensured;

(5) the ceramic anilox roller is subjected to laser engraving for gluing, the number of the screen lines of the anilox roller screen holes is 70 lines, the depth is 35-45 mu m, the gluing amount and uniformity are accurately controlled, and the composite fastness of the product structure is ensured. Compared with the traditional extrusion coating sizing process, the coating yield of the composite adhesive is improved by 5-10 percent;

(6) by determining that 21-micron film +200 g/square meter bottom paper is used, the packaged finished product is 250g square meter, and the crease stiffness after die cutting is less than or equal to 75N, the forming requirement of a customer on box pasting can be met;

(7) through double-sided corona treatment, the surface tension of the film is improved, and the adhesion fastness of printing ink is ensured;

(8) in order to prevent the finished paper from warping and deforming, the mesh points of the used back coating roller are 90 lines in mesh grid line number and 30 microns in depth, the solid content of the used back coating is 55%, the viscosity is 20S, the water-proof and water-locking functions are achieved through thickening back coating treatment, and the phenomenon that the finished paper deforms due to water absorption (or water loss) is avoided after compounding.

The above description is only for the specific embodiments of the present invention, but the protection scope of the present invention is not limited thereto, and any person skilled in the art can easily think of the changes or substitutions within the technical scope of the present invention, and all should be covered within the protection scope of the present invention, therefore, the protection scope of the present invention should be subject to the protection scope of the claims.

Claims

1. The utility model provides a black highlight composite paper gravure on-line printing structure which characterized in that: comprises a back coating, a white card bottom layer, a press polish coating layer, a composite glue layer, a vacuum aluminum plating layer, a black layer, a PET high-brightness film layer and a printing finishing layer from bottom to top.