Add aluminum paste in the injection molding process
 

With the development of economy, more and more raw materials enter people's lives, and aluminum paste is one of the more prominent ones. In some families, the refrigerator shell has an excellent mirror effect, and its raw material is aluminum paste. So what should you pay attention to when adding aluminum paste in injection molding? Let's look at the sunflower chemical engineer to give you a brief introduction.

Nowadays, spray-free materials are more valued by factories, because spray-free materials combine the performance of plastics with the appearance of spraying, which is green and environmentally friendly, without paint falling off for a long time, and also reduces production costs. In order to increase the color and metallic texture of the spray-free materials, the raw materials that need to be added are aluminum paste, aluminum pigment powder, and aluminum granules.

 

Here we are collectively referred to as aluminum pigments. In injection molding, the more regular aluminum pigment flake structure, the better the dispersibility; the closer the aluminum pigment flake structure is to the spherical shape, the better the dispersibility; the finer the aluminum pigment particle size, the more difficult it is to disperse, and the larger the particle size, the easier it is dispersion.

  

According to the plastic material, you can choose aluminum paste, aluminum granules or aluminum pigment powder. The use of aluminum pigment powder has no smell and the mixing is relatively simple, but the structure of the aluminum sheet is not good. Depending on the process, there will be different levels of marks. It is suitable for simple structure Injection molding and blister applications. Using aluminum granules, the flake structure is controllable and the hue is prominent, which is suitable for complex injection molded parts.

 

Aluminum granules can only disperse low-molecular-weight materials to polymer materials, and aluminum granules of the same material are better matched. For plastics with higher viscosity, aluminum pigments with larger particle size and more regular flakes should be selected.

 

At present, the application direction of plastic spray-free is such as: plastic parts in the interior and exterior of automobiles, home appliance shells, luggage, mobile phones, computer shells, plastic toy shells, home decoration equipment, smart robots and other industries. More and more industries that are affected by environmental protection choose spray-free Material, therefore, our aluminum pigment has become an indispensable raw material.

 

Plastic spray-free requirements for aluminum pigments include: strong metallic appearance, easy dispersion, good fluidity, regular flake structure, and strong shear resistance.

 

The above content is an introduction to what needs to be paid attention to when adding aluminum paste in injection molding. Aluminum paste can be soaked in a solvent before use. According to the pigment: solvent 1:2 mixing and soaking, then use it, which can accelerate the dispersion and reduce the high speed. Decentralized existence. When using imitation electroplating and super flash aluminum paste, try not to disperse at high speed. Use low speed dispersion, especially super flash aluminum paste. High speed dispersion cannot be used because the aluminum sheet is too large and it is easy to bend.