one Color trend of plastic steel profiles

Window and door of MODEL STEEL section IS DEVELOPED FOR many years IN our COUNTRY, production capacity OF MODEL steel section already reaches millions of tons at present. Product competition is becoming increasingly fierce, low price competition can no longer find a way out for the development of enterprises, we need to constantly develop new products, improve the quality of products, increase their intrinsic value, in order to enable the long-term development of enterprises. With the progress and development of technology and the improvement of people's living standards, the majority of users' demand for product quality and appearance is further improved, and the demand for color plastic Windows is increasing day by day. At present, most of the domestic plastic steel profile enterprises use the co-extrusion method to produce color plastic steel profiles. According to the development experience of the world door window section industry, our color plastic steel section will gradually develop and grow. With the improvement of the market awareness of color plastic steel products, consumers will change the concept of color Windows will be favored. The environment is more beautiful, life is more colorful, this is the inevitable trend of human living environment

two At present, there are the following processing methods for plastic steel profiles in China:

1. Two-color co-extrusion method

2, aluminum plastic compound method, spraying method

3, color coating method

4. Whole body staining method

Whole body dyeing method: Higher cost. Little improvement on plastic weather resistance. At present, the use of manufacturers are few, the whole body wood profile is not real enough, poor weather resistance, the state has banned the use of. This article will not discuss it.

Two-color co-extrusion method: there are many enterprises have adopted, the cost is lower. But this method needs to increase a large number of molds for each product, and has higher requirements for extruder, mold maintenance and replacement costs continue to occur. Product yield is also lower than other methods. It is difficult to recycle waste products, resulting in a single color waste and little improvement in product quality. See the previous article for details on co-crowding.

Aluminum plastic compound method: is an effective spraying method, less used in the market. It is the combination of aluminum alloy and plastic substrate to achieve the best performance. This method uses the aluminum alloy surface spraying process mature, after multi-channel surface treatment of aluminum alloy, the paint layer is firmly combined, the product color and white distinct, more beautiful. The overall spraying can not achieve the above effect.

However, most plastic production plants do not have aluminum alloy production line, can not be matched. Aluminum alloy spraying equipment investment is larger. Molds increase a lot, and long - term consumption. This method does not conform to the flexible production of small batch multi - color. Moreover, many physical properties of aluminum alloy and plastic material itself are inconsistent (such as the coefficient of expansion is different, easy to affect the strength of the gap) so that the mold design is difficult, poor adaptability in a variety of climate conditions, resulting in product defects. Its appearance is limited to a single color. Three-dimensional sense is not strong, and the quality of the paint is very important to the product

Color coating method: popular in Europe, its processing technology mature, convenient. High yield without mold change and input, small waste. The use of PUR hot melt adhesive can achieve high strength combination, no shedding, no foaming, excellent weather resistance. Fast production speed, no matter the quantity of small can be processed at any time according to the order. The appearance is real, there is a three-dimensional sense, the product is more upscale.

Many years ago, domestic profile enterprises have been in the production of coated UPVC profiles, the adhesive used for solvent volatile curing (cold adhesive). First of all, the surface of the profile cleaning, blow dry, coated with cold glue film must be through hot air drying device will volatile solvent, this method in mass production of adhesion quality (peeling strength) control difficulty, not environmental protection, adhesion time if control is not allowed to volatilize insufficient phenomenon, residue in long-term exposure to bubbles, affect the overall quality. Reactive polyurethane adhesive (PUR) due to its in the film bonding, the reaction between the substrate and the film, chain extension, the generation of high cohesion polymer, high strength, the use of temperature can reach 100C above, and has good elasticity, high quality mechanical properties. Suitable for automatic production line, and no volatilization, no pollution to the environment, anti-aging, successfully solved the problem of weather resistance and peeling strength. Because it is 100% solid content of hot melt adhesive, so in the coating process and use of equipment and solvent adhesive is different, it is the use of special heating device PUR hot glue heating melt into a fluid, and through heating protection hose and special cloth glue system coated on the back of the film. After the coating and profile are pressurized, the adhesive layer rapidly condenses and plays a bonding role. Then, with the help of the moisture in the air or attached to the surface of the adhesive body, the polymer with high cohesion is generated by the chain extension, so that the adhesive force and heat resistance of the glue are significantly improved. Many domestic plastic profile factories and coating factories use reactive polyurethane cool glue to produce color profile, and make China's color steel window technology reach or close to the world advanced level.