CN212827281U

CN212827281U - Solvent-free aluminizing composite transfer online printing structure

Info

Publication number: CN212827281U
Application number: CN202021081550.8U
Authority: CN
Inventors: 易元锋; 何承鹏
Original assignee: Guizhou Jinjia New Packaging Material Co ltd
Current assignee: Guizhou Jinjia New Packaging Material Co ltd
Priority date: 2020-06-12
Filing date: 2020-06-12
Publication date: 2021-03-30
Anticipated expiration: 2030-06-12

Abstract

The utility model discloses a solvent-free aluminizing composite transfer online printing structure, including back coating, white card bottom, solvent-free composite glue layer, aluminize layer, separating layer and printing picture and text layer from the bottom up. The utility model discloses owing to use polyurethane solventless glue as the adhesive, take place chemical reaction through isocyanic acid radical group in the gluing agent heating back component and hydroxyl group, form the great material that contains carbamate radical group of molecular mass to reach adhesive purpose, consequently its compound fastness is reliable very much.

Description

Solvent-free aluminizing composite transfer online printing structure

Technical Field

The utility model belongs to the technical field of the printing of packing color box, a solvent-free compound transfer on-line printing structure of aluminizing is related to, still relate to a printing method of solvent-free compound transfer on-line printing structure of aluminizing.

Background

The foreign German Hangao company firstly proposes and realizes the preparation of the solvent-free polyurethane adhesive into the composite film packaging material in the last 70 th century, and gradually popularizes the composite film packaging material to more than 50 percent of the market share, and also gradually introduces solvent-free compound machine equipment in China, and has the advantages that: the whole production process is pollution-free; no solvent residue exists in the final product; the production process is safe and has no hidden trouble. Therefore, the research on solvent-free compounding and transfer is more and more in recent years in China, and particularly in the field of plastic flexible packaging, a solvent-free compounding printing process is realized in a large quantity. However, for cigarette pack printing, the PET aluminized transfer paper is one of the most important raw materials, and the national requirement for detecting the solvent residue is very high. At present, the conventional production process on the market mainly separates the solvent-free composite transfer paper making of the PET aluminizer from the printing processing procedure, and the prepared product contains pollutants.

Disclosure of Invention

The to-be-solved technical problem of the utility model is: provides a solvent-free aluminizing composite transfer on-line printing structure, which does not contain volatile organic compound solvent residue, is safe and pollution-free in the same manufacturing process and products and solves the problems in the prior art.

The utility model discloses the technical scheme who takes does: a solvent-free aluminizing composite transfer online printing structure comprises a back coating, a white card bottom layer, a solvent-free composite glue layer, an aluminizing layer, a separating layer and a printing image-text layer from bottom to top.

The utility model has the advantages that: compared with the prior art, the utility model discloses owing to use polyurethane solventless glue as the adhesive, isocyanic acid radical group and hydroxyl group in the component take place chemical reaction after the gluing agent heating, form the great material that contains carbamate radical group of molecular mass to reach adhesive purpose, therefore its compound fastness is particularly reliable.

Drawings

Fig. 1 is a schematic structural diagram of a solventless aluminizing composite transfer on-line printing structure.

Fig. 2 is a printing process flow diagram of a solvent-free aluminizing composite transfer on-line printing structure, in fig. 2, 7 is unreeling base paper, 8 is solvent-free glue coating, 9 is unreeling a PET aluminizing film, 10 is a compounding process, 11 is a drying channel, 12 is a peeling process, 13 is base film reeling, 14 is multi-color printing, 15 is slitting, and 16 is a printing paper stack.

Detailed Description

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

Example 1: as shown in fig. 1, a solvent-free aluminizing composite transfer online printing structure includes, from bottom to top, a back coating layer 1, a white card bottom layer 2, a solvent-free composite glue layer 3, an aluminizing layer 4, a separation layer 5, and a printing image-text layer 6.

Example 2: as shown in fig. 2, a printing method of a solventless aluminizing composite transfer on-line printing structure includes: the PET aluminizing transfer film and the winding drum white card base paper are subjected to composite transfer through polyurethane solvent-free composite transfer glue, and after the PET base film is dried and stripped on line, the PET aluminizing transfer film and the winding drum white card base paper are sent to a gravure printing unit on line to complete printing and processing, so that the novel PET aluminizing transfer paper packaging material with a multilayer structure and without solvent residue is finally obtained.

Preferably, the printing method of the solvent-free aluminizing composite transfer online printing structure specifically includes the following steps:

(1) preheating the solvent-free transfer glue, and coating the PET aluminized film surface by a four-roller coating machine structure;

(2) compounding the PET aluminized film coated with the solvent-free glue in the step (1) with base paper;

(3) drying the product prepared in the step (2), and peeling off the PET base film;

(4) back coating the product prepared in the step (3) for processing treatment;

(5) and (4) carrying out gravure on-line printing processing on the product prepared in the step (4) to obtain a final printed product.

Preferably, the solvent-free transfer glue adopts a high-performance self-addition polymerization single-component polyurethane adhesive, the solid content is 100, the viscosity at normal temperature (25 +/-3 ℃) is 800 +/-100 mPa.s, and the specific gravity is 1.05-1.10.

Preferably, the four-roll or five-roll coater structure is used for coating, the intermittence is 0.02-0.05mm, the speed is 150-180m/min, and the pressure is 2-5kg during coating.

Preferably, the tension of the PET aluminizing film control equipment during the compounding in the step 2 is controlled to be 5-8kg, and the variation range is less than or equal to 0.5 kg.

Preferably, the components of the roll white cardboard comprise the following components in percentage by mass: 60% of raw wood pulp, 35% of chemical pulp and 5% of additive.

Preferably, the gravure roller used in the printing is mainly laser engraved with a shaft, the printing speed is 150-180m/min, and the viscosity change of the printing ink is less than or equal to 3 s.

The printing method has the following advantages:

(1) because polyurethane solvent-free glue is used as an adhesive, isocyanate groups and hydroxyl groups in the components are subjected to chemical reaction after the adhesive is heated to form a material with larger molecular mass and containing carbamate groups, the purpose of adhesion is achieved, and the compounding fastness is particularly reliable;

(2) the solvent-free PET aluminizing composite transfer process has the advantages that the cost of the solvent is reduced, the environment is not polluted by volatilization of the organic solvent, a solvent volatilization drying section is not needed, the energy consumption is reduced, the risks of fire and explosion are avoided, solvent explosion-proof measures are not needed, and equipment and a storehouse for storing the solvent are not needed;

(3) the obtained transfer paper product has no volatile organic compound residue, and eliminates the invasion and pollution of solvent to printing ink;

(4) because the moisture balance variation of the paper body paper in the processing process is extremely small, the paper after composite transfer does not need to be treated in a curing period, energy is saved, and the color bursting problem is not easy to occur at the position of a crease line when a product is processed and formed in a post process;

(5) the PET aluminizer and the bobbin base paper are subjected to compound transfer online printing synchronously, the production efficiency is high, the efficiency can be improved by more than 50% only by 24-28 hours from the completion of the paper preparation to the completion of the printing, the quality is stable and reliable, in addition, the existing printing structure has completely consistent functions with the conventional process preparation, and the printing structure absolutely does not contain VOC solvent residue, so the printing structure is very environment-friendly;

in summary, the following steps: because the polyurethane solvent-free glue is used as the adhesive, the composite fastness is reliable, volatile organic compounds cannot be generated in the production process, and residual pollution to the packaging product cannot be generated; in the processing process, because the moisture balance variation of the paper body paper is extremely small, the paper after composite transfer does not need to be treated in a curing period, so that the energy is saved, and the color bursting problem is not easy to occur at the position of a crease line when a product is processed and formed in a post process; the compound transfer on-line printing of the PET aluminizer and the bobbin base paper is synchronously finished, the production efficiency is high, and the quality is stable and reliable.

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. A solvent-free aluminizing composite transfer online printing structure is characterized in that: comprises a back coating, a white card bottom layer, a solvent-free composite glue layer, an aluminum-plated layer, a separation layer and a printing picture and text layer from bottom to top.