Comparison of precoat and instant coating processes

Lamination is to improve the appearance of the product brightness, tension, weight and so on. At the same time, due to the early processing methods, the use of rubber-based and resin-based glues to coat composite BOPP films has caused environmental pollution that cannot be recycled, and also causes pollution to the earth. To this end, it has promoted the reform of material production, equipment manufacturing, production management, and scientific research. The vigorous promotion of the precoating dry composite process has changed the long-term existence of the coating wet composite process: the product is prone to blistering, stripping, curling quality problems and atmospheric pollution during production, poisoning to operators and It is easy to cause fire and other backward situations that affect the rapid development of the packaging industry. The innovation of craftsmanship promotes the use of high technology in the post-press field. Non-polluting, reliable and convenient hot-melt adhesives and their products have increasingly demonstrated their superiority. From the perspective of international developed countries, the pre-coating dry composite process will gradually replace the traditional wet-coated composite process is the inevitable trend of development. In the following, the traditional instant coating process is compared with the precoating dry composite process.

(A) laminating process The precoating dry-type compounding process reduces the process flow of the most prone to problems, such as glue adjustment, glue coating and drying. Avoid the occurrence of blisters, stripping, curling and other quality accidents and eliminate the sources of pollution, poison, and fire. (II) Product Quality When the laminated film is a thick layer of ink, the book is printed in the text and printed in color, composite printing and paste processing of the printed parts and high humidity, low atmospheric pressure conditions are particularly frequent and serious, easy to produce foaming and stripping. It is not easy to produce blisters and release film, and the effect is good. When the pressure is applied during the gluing, the temperature of the drying tunnel tends to curl. Since the hot-pressing mechanism of the thin film self-discharging mechanism has a short stroke, and the surface has been pre-coated with a hot-melt adhesive, there is no need to re-force the deformation due to the applied pressure of the coating under tension and leveling, and there is basically no curling. Hazardous spots or haze, which are prone to gloss, generate volatile organic solvent chemicals that migrate to the atmosphere and carriers, and contamination can easily cause fires. The ability to eat powder is strong, generally do not need to powder to reduce the process, improve efficiency, no pollution, no fire cited. (3) Production cost (using 787 X 1092mm paper as an example, unit yuan/order) Unit price and usage amount (yuan) unit price and usage amount (yuan)

BOPP film 15.00/KG
About 8KG/order

120.00

Precoat:

27/KG
10KG/Remarks:
0.65 yuan/M2 approximately 27/KG

270.00 Adhesive 11.00/KG
About 7KG/order 77.00 solvent 6.00/KG
About 4KG/Order 24.00 221.00270.00 Main motor 1.5KW
Coating motor 1.0 KW
Rubber pump motor 0.2KW
Blower motor 0.5KW
Heating roller 6 KW
Heating charcoal 9.6KW
Exhaust motor 0.5KW

Main motor 1.5KW

Heating roller 6 KW

Total power 19.3KW
0.7/ KW
About 1.2 orders /H11.55 total power 7.5KW
0.7/ KW
About 1.5 orders / H3.73 4 people/class about 17 orders/class
20.00 yuan/person
80/class 8.829 person/class approximately 19 orders/class
25 yuan/person
75.00/shift 7.14 8.897.14 No calculation of site cost and defective goods loss and quality reliability 241.3938.87 0.240.28 0.120.14 (4) The relationship among temperature, pressure, and speed, and the influence of quality during the laminating operation.

The precoating film dry compounding process is an innovative advancement compared to the wet coating compounding process. It is a process reform that fundamentally solves the congenital defects of the instant coating process. Is it because the precoating film is not used? Will there be problems and there will be no quality problems such as blistering? We always think that even the best process has its limitations. Even the best materials need to be used correctly. The use of pre-coated films for dry compounding fundamentally solves the problem of solvents being the source of foaming, but if they cannot master the operation Essentials, it is not used correctly, not