Street lamp appearance modeling began to use thermal transfer technology
As the appearance of street lamps is becoming more and more diversified, and patterns are becoming more and more particular, thermal transfer technology is also used in the appearance of street lamp poles. Then let's take a look at what thermal transfer is:
Thermal transfer film product introduction: Thermal transfer foil is made of polyethylene film as a backing paper with a wood grain decorative layer printed on it. The surface is coated with a protective layer, a base color layer, a release layer and a hot melt adhesive layer. By heating the high-temperature silicon roller, applying temperature and pressure to the transfer foil, the transfer layer composed of the decorative wood grain printing layer, surface protection layer, and base color layer is separated from the polyethylene and transferred to the surface of wood-based panels or furniture parts Above, a decorative surface is formed, and the surface has excellent properties such as wear resistance, heat resistance, and light resistance. The pattern is novel and beautiful, and the color tone is stable. It is a good decorative material.
Advantages of thermal transfer decoration process:
1. Thermal transfer is a dry production process and process list
1. The whole work can be completed without adhesive.
2. Thermal transfer can well decorate the edge, board surface, and even the side trim surface of the part.
3. Thermal transfer not only can make the product appearance and touch have a real woody feel.
4. The performance of thermal transfer coating exceeds that of general finishing.
5. The adhesion between the decorative layer and the substrate is seamless, and there are almost no gaps visible to the naked eye.
6. After using thermal transfer, its parts can be immediately transferred to the next step for processing.
7. The heat transfer layer can be covered with ironing.
The use parameters of the heat transfer film are determined: The heat transfer film has its own unique properties. In order to obtain the ideal hot stamping effect, the best temperature, pressure and speed must be strictly controlled. This is the index of three major technological parameters.
1. Determining the temperature: When the temperature is too low, the hot stamping will not be possible or the hot stamping will not be strong, and the imprint will be blurred; if the temperature is too high, the surface of the color layer will be oxidized, causing the product to lose luster, and the color will become darker. Will bubble. To determine the best hot stamping temperature, the following factors should be considered: pressure, speed, area, room temperature, etc. The hot stamping temperature generally ranges from 140°C to 180°C. Once the optimal temperature is determined, it should be kept constant, and the temperature difference should be within ±2°C.
2. Determination of pressure: The stamping pressure is generally 4-6 kg/cm2. If the pressure is too small, the hot stamping film cannot be adhered to the substrate, which reduces the fastness; if the pressure is too high, the compression deformation of the substrate will increase, resulting in pattern deformation and thinning of the printed layer. If you are hot stamping complex and uneven products, you must pay more attention to the uniformity of each pressure point. The pressure angle between the hot stamping wheel and the substrate is required to be higher. Otherwise, it is very easy to appear partly and partly fast.
3. Determining the speed: it should be determined according to the hot stamping area, and the power of the heating temperature should be considered at the same time. Generally, the speed is firstly determined, then the pressure is determined, and finally the temperature is determined.
