Waiting for you to follow us in these SNS, thank you. 
0086-17322110281
info@moldclamps.net

DGMF MOLD CLAMPS CO., LTD
·

Complete Specifications

Adequate Inventory

Factory Outlet

Fast Delivery

Quality Assurance

Competitive Price

Customizable

Our Mold Clamps Make Your Machines More Efficient And Durable, Lower Maintenance Costs!

Request for Inquiry
MOLD CLAMPS
+
+
NEWS    PRODUCTS
DGMF MOLD CLAMPS CO., LTD

Dynamic news
Why Do Plastic-colored Products Fade?
Original: Original | Author: DGMF Mold Clamps | Publish Time: 2021-06-29 | 1664 Views | Share:
Plastic-colored products will fade due to many factors.

Adding light stabilizers such as ultraviolet absorbers to the masterbatch can improve the light resistance of colorants and colored plastic products.

2. Heat resistance

The thermal stability of a pigment refers to the degree of thermal weight loss, discoloration, and fading of the pigment at the processing temperature. Inorganic pigments are composed of metal oxides and salts, with good thermal stability and high heat resistance.

The pigments of organic compounds will undergo molecular structure changes and a small amount of decomposition at a certain temperature. Especially for PP, PA, PET products, the processing temperature is above 280. When selecting colorants, one should pay attention to the heat resistance of the pigment, and the heat resistance time of the pigment should be considered on the other hand. The heat resistance time is usually 4-10min.

3. Antioxidant

Some organic pigments undergo macromolecular degradation or other changes after oxidation and gradually fade. This process is high-temperature oxidation during processing, and oxidation when encountering strong oxidants (such as chromate in chrome yellow). After the color lake, azo pigment, and chrome yellow are mixed and used, the red color will gradually fade.