CN111532002A - Solvent-free aluminizing composite transfer online printing structure and printing method - Google Patents
Solvent-free aluminizing composite transfer online printing structure and printing method Download PDFInfo
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- CN111532002A CN111532002A CN202010535389.5A CN202010535389A CN111532002A CN 111532002 A CN111532002 A CN 111532002A CN 202010535389 A CN202010535389 A CN 202010535389A CN 111532002 A CN111532002 A CN 111532002A
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- printing
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- free
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- transfer
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B29/00—Layered products comprising a layer of paper or cardboard
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B29/00—Layered products comprising a layer of paper or cardboard
- B32B29/002—Layered products comprising a layer of paper or cardboard as the main or only constituent of a layer, which is next to another layer of the same or of a different material
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B33/00—Layered products characterised by particular properties or particular surface features, e.g. particular surface coatings; Layered products designed for particular purposes not covered by another single class
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41M—PRINTING, DUPLICATING, MARKING, OR COPYING PROCESSES; COLOUR PRINTING
- B41M1/00—Inking and printing with a printer's forme
- B41M1/10—Intaglio printing ; Gravure printing
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- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
- D21H27/00—Special paper not otherwise provided for, e.g. made by multi-step processes
- D21H27/10—Packing paper
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- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
- D21H27/00—Special paper not otherwise provided for, e.g. made by multi-step processes
- D21H27/30—Multi-ply
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- Adhesives Or Adhesive Processes (AREA)
Abstract
The invention discloses a solvent-free aluminizing composite transfer online printing structure and a printing method, wherein the 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 separation layer and a printing image-text layer from bottom to top, and the method comprises the following steps: carrying out compound transfer on the PET aluminized transfer film and the winding drum white card base paper through polyurethane solvent-free compound transfer glue, drying and peeling the PET base film on line, and then sending the PET aluminized transfer film and the winding drum white card base paper to a gravure printing unit on line to finish printing processing. According to the invention, the polyurethane solvent-free glue is used as the adhesive, and after the adhesive is heated, the isocyanato group and the hydroxyl group in the components are subjected to chemical reaction to form a material containing a carbamate group with large molecular mass, so that the purpose of adhesion is achieved, and the compounding fastness of the polyurethane solvent-free glue is particularly reliable.
Description
Technical Field
The invention belongs to the technical field of packaging color box printing, and relates to a solvent-free aluminizing composite transfer on-line printing structure and a printing method of the solvent-free aluminizing composite transfer on-line printing structure.
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 has low efficiency because of the following reasons: conventionally, the preparation of 30 ten thousand pieces of PET aluminum-plated transfer paper requires 24 hours for composite transfer, 24 to 48 hours for aging, and 24 to 96 hours for printing of the 30 ten thousand pieces of paper.
Disclosure of Invention
The technical problem to be solved by the invention is as follows: the method realizes synchronous completion of composite transfer processing and printing finishing processing of a PET aluminized film and roll bottom paper, saves processing procedures, obtains a PET aluminized transfer paper printing structure product without volatile organic compound solvent residues, and has safe and pollution-free processing procedures and products so as to solve the problems in the prior art.
The technical scheme adopted by the invention is as follows: 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.
A printing method of a solvent-free aluminizing composite transfer online printing structure comprises the following steps: 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 coater is configured to perform the coating with a pause of 0.02-0.05mm, a speed of 150-180m/min, and a pressure of 2-5 kg.
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 invention has the beneficial effects that: compared with the prior art, the invention has the following effects:
(1) because the polyurethane solvent-free glue is used as the adhesive, the isocyanate group and the hydroxyl group in the components are subjected to chemical reaction after the adhesive is heated to form the material with larger molecular weight and containing the carbamate group, 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, the explosion-proof measure of the solvent is 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.
Drawings
Fig. 1 is a schematic structural diagram of a solventless aluminizing composite transfer on-line printing structure.
Fig. 2 is a flow chart of a printing process of a solventless aluminizing composite transfer on-line printing structure.
Detailed Description
The invention is further described below with reference to specific examples.
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, a white card bottom layer, a solvent-free composite glue layer, an aluminizing layer, a separation layer, and a printing image-text layer.
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 above description is only an embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can easily conceive of changes or substitutions within the technical scope of the present invention, and therefore, the scope of the present invention should be determined by the scope of the claims.
Claims (8)
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.
2. The printing method of a solventless aluminizing composite transfer inline printing structure according to claim 1, wherein: the method comprises the following steps: 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.
3. The printing method of the solventless aluminizing composite transfer inline printing structure according to claim 2, wherein: the method specifically comprises 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.
4. The printing method of the solventless aluminizing composite transfer inline printing structure according to claim 3, wherein: the solvent-free transfer glue adopts a high-performance self-addition polymerization single-component polyurethane adhesive, the solid content is 100, the viscosity is 800 +/-100 mPa.s at normal temperature, and the specific gravity is 1.05-1.10.
5. The printing method of the solventless aluminizing composite transfer inline printing structure according to claim 3, wherein: when the four-roller or five-roller coating machine 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.
6. The printing method of the solventless aluminizing composite transfer inline printing structure according to claim 3, wherein: the tension of the PET aluminizer 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.
7. The printing method of the solventless aluminizing composite transfer inline printing structure according to claim 3, wherein: 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.
8. The printing method of the solventless aluminizing composite transfer inline printing structure according to claim 3, wherein: the gravure roller used in printing is mainly laser engraved with a shaft, the printing speed is 150-180m/min, and the viscosity change of printing ink is less than or equal to 3 s.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010535389.5A CN111532002A (en) | 2020-06-12 | 2020-06-12 | Solvent-free aluminizing composite transfer online printing structure and printing method |
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| CN202010535389.5A CN111532002A (en) | 2020-06-12 | 2020-06-12 | Solvent-free aluminizing composite transfer online printing structure and printing method |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112721398A (en) * | 2020-12-29 | 2021-04-30 | 中丰田光电科技(珠海)有限公司 | Preparation method of laser transfer paper |
| CN114523776A (en) * | 2021-12-30 | 2022-05-24 | 山东东宇鸿翔装饰材料有限公司 | Printing process of non-dot plain paper |
-
2020
- 2020-06-12 CN CN202010535389.5A patent/CN111532002A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112721398A (en) * | 2020-12-29 | 2021-04-30 | 中丰田光电科技(珠海)有限公司 | Preparation method of laser transfer paper |
| CN114523776A (en) * | 2021-12-30 | 2022-05-24 | 山东东宇鸿翔装饰材料有限公司 | Printing process of non-dot plain paper |
| CN114523776B (en) * | 2021-12-30 | 2024-01-05 | 山东东宇鸿翔装饰材料有限公司 | Printing process of non-dot plain color paper |
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