Metal Plate Coating Technology

The metal plate coating technology is a plastic film and the metal plate by hot pressing, and the film is attached to the metal plate processing techniques. Coating technology was born in 1977 in Japan, originally used for canning, instead of within the coating, coated technology, up to now has been the development of building materials inside and outside decoration, household appliances, automobiles and other areas. Coating processing because they do not use the adhesive, a solvent, it does not contain formaldehyde, and the plastic film has been embellished decoration, antibacterial, anti-pollution treatment, to ensure the safety and health of the human body, but also play a role in environmental protection galvanized metal barrel production line.
Film faced plywood used in the canning industry, commonly known as coated iron (Laminated Steel) is a cover made of PP film and tinplate. Inside the traditional metal cans must go through the coating process, the coating method comprising the substance harmful effects on humans and the environment will, in particular canned, the present processing method is used in the inner wall of the tank resin coating . However, due to this coating, the coating process used to contain the environmental hormone harmful substance - bisphenol A type (Bis-phenol A) substance, is an internationally recognized environmental hormones, and may be eluted problem, once the dissolution exceeded, the body will have a negative impact. This problem led to serious consequences has attracted attention at home and abroad.

The birth of the metal plate coating technology is a revolutionary advances in the production of metal cans. With its wide range of applications, the traditional metal cans production process and the technology will be the subversion, productivity, cost of production, hygiene, environmental protection and other aspects are going to be a big step forward.

Film faced plywood Features

Film faced plywood is more than the traditional printed and coated tinplate excellent resistance to deep red, wear-resistant, corrosion resistant and decorative features such as a dual characteristics of both polymer resin film and sheet metal metallic materials.This feature determines the film faced plywood can be used as a substrate, fast and accurate register of printing film lamination, cold rolled sheet, film faced plywood greatly reduces the cost of materials.

1, film faced plywood has excellent performance

(1) film faced plywood, corrosion resistance, anti-corrosion properties, coating plate can not be compared. Plastic film composite panels, paint board contradictions exist corrosion resistance and adhesion, film faced plywood is easily solved, tomato cans, two cans and food cans, film faced plywood The ideal material.

(2) film faced plywood appearance of smooth, smooth, decorative, and feel good.

(3) film faced plywood chemical stability, weather resistance, anti-aging, and can adapt to harsh environments without shedding and corrosion.

(4) film faced plywood processing performance is excellent, resistant to deep red, wear-resistant, not easy to damage during processing. Due to its surface smoothness, lubricating action, the processing of the metal tank is easier to shape.

2, film faced plywood lower material costs

(1) Since the coating plate is a dual characteristics of both the plastic film and the metal sheet metal material, so that, under normal circumstances, do not have to use tinplate as a base to produce FuMoBan. Cold rolled film, its cost advantage is obvious.

(2) film faced plywood production coil continuous high-speed production lines, compared with the traditional Indian iron technology, the production speed is three times faster.

(3) film faced plywood production process, due to the printing of plastic film and the film can be a complete, compared with the traditional Indian iron technology with low energy consumption, speed, and with less material.

(4) metal plate coating equipment is simple and easy maintenance. Tinplate printing and coating thanks to the technical experience of the operator to control each channel technology, film faced plywood production technology and equipment, production process has automatic control, easy operation and maintenance, without any special professional training will be able to master the production and maintenance techniques.

(5) Compared with the traditional printed tinplate coating, less equipment and investment in smaller, smaller footprint, use fewer workers. Thus saving a lot of investment in equipment and labor costs.

3, environmental protection, energy and health

(1) film faced plywood production is solvent and exhaust, do not need to paint drying, less pollution of the environment, energy savings is also very obvious.

(2) film faced plywood does not use chemical coatings and inks, instead of using plastic film for thermal lamination film faced plywood does not contain harmful chemicals. Do not use the adhesive, a solvent, to ensure that the human health, safety. To solve the problem of environmental hormones, VOC.

(3) excluding phthalic acid, phthalic acid esters and other harmful substances, in order to make full use of renewable resources. At the time of manufacture to reduce carbon dioxide generation, renewable resources does not produce dioxin. Waste-coated cans as iron resources recycling rate of 100%, the film and the iron is recovered together with the recycling process, the combustion due to heating, the film turned into water and CO2, this partial conversion of natural gas, as the iron heating power energy to use. Waste film can be used as regeneration and utilization.

Metal cans cans commonly used welding methods, welding metal exposed portion of the film must be painted up. FIG 1 is a metal the tank weld complement membrane schematics. The use of the non-adhesive coating technology, namely the use of to repair welding part of the polypropylene resin and coated with the same material, so that the exposed metal part of the coating and melt repair completed at the same time. Give full play to the characteristics of the polypropylene film is heated fused, forming a vacuum bag-like effect, the contents will not leak. Due to the adhesive agent and a lubricant is not used in the canning process, and thus avoid the additional material causes the content resistance, residual solvents, plasticizers, etc. eluted dangerous. And does not produce such content resistance Poor adhesion is weak, the bubbles into the problem occurring in the coating process of coating complement.



Figure 1 metal can weld complement membrane

You can also tape complement coated or powder painted up, using the same component of the film the resin tape or powder, steel laminated PP albuginea White PP powder, painted up in the canning required.

China has independently developed seam coating device, installed in the rear of the seam welder, seam welding immediately after the auto-complete film cans through a special process, effectively solve the quality problems of weld painted up.

5, film faced plywood quality control

Film faced plywood quality inspection, generally use the JIS K6854-1 adhesive strength peel test; distillation experiment; the first checkerboard method; heating method of recognizing the original in the film industry and other detection methods.

(1) Appearance quality testing purpose of the beginning of the film board just for decoration, the appearance does not change is the important requirements.

Observe the changes in the quality of its appearance experiment to ISO0877 standard, to select Emmaqua-NTW (outside the house set light to promote exposure experiment), the experimental irradiation energy to the surface of fibrosis and micro fibrosis. Surface gloss, brightness, and color changes were observed.

① gloss gloss is not changed, the mirror state maintained at 86%.

② lightness brightness does not change, and also by the stability of the composite printing technology has not been damaged.

③ color within the color difference △ E2 high weather resistance. Known PMMA film having high durability, with the same fluorine-based plastic film having a high weather resistance.

(2) physical durability test using the changes in physical strength test in a high temperature environment (85 ° C) between 90 days to promote its degradation, the residual ratio of tensile strength, elongation was measured. Table 4-6 lamination film physical strength.

Table 4-6 Common laminating film durable physical strength comparison

Pilot project
PP laminated film

PVDF laminated film

Tensile strength of the residual ratio (%)

≥ 90

≥ 97

The residual elongation rate (%)

≥ 90

≥ 98

(3) physical laminating film laminated film refractive index, heat resistance and other physical properties testing, laminating film should have a certain optical and thermal physical properties. Table 4-7 laminated film physical performance requirements.

Third, the film board

Film faced plywood in various industries to obtain a wide range of applications, especially in Japan, the most widely used.

1, food cans

In food cans: food cans, beverage cans, cap, candy, tea, and easy open ends.

2, chemical tanks

Applications in the chemical tank: chemical cans, paint cans, paint cans, two aerosol cans and a variety of top-bottom cover. Is left blank film processing technology, Can be applied to a variety of three-piece cans.

3, decorative cans, gift cans

Decorative pot: portable ashtray, gift boxes, stationery, jewelry boxes, cigarette cases, wine and so on.

4, the application of other industries

Applications in other industries: building panels, walls, ceiling, security doors, floors, awning.