This is why, such as the anti-glare board and horses on the highway will fade a few years later, but in general, the quantification of UV ingredients will be added to ensure the durability of the product. The pigment in the organic compound changes its molecular structure at the corresponding temperature and produces a few decomposition.
In fact, in the process of producing a plastic bottle, if it is a plastic product that requires high temperature heating, it is necessary to use a pigment with strong heat resistance to ensure the discoloration of the product and the full appearance. One is a high temperature oxidation during the machining process, and the other is oxidation in the presence of a strong oxidant such as chromate in chromic acid.
Regarding field products exposed to strong light,China 32 400 Silicone Valve cap Suppliers the light-to-light level of the colorant used is an important goal. When the lake, azo pigment and chrome are mixed, red will gradually decrease. In addition, it cannot be broken and stands on the table. For example, the nozzle should be transmitted accurately, and it is used. This bottle method is called two-step method, that is, the injection molding and forming a bottle blank, once again blown Plastic processing constitutes a PET plastic bottle.
The content of the article comes from the network. 5, cycle cycle: Fast production cycle means progress on the nozzle requirements. If you have any questions, please contact me to delete it! . 270-295 ° C does not equal, the enhanced grade GF-PET can be set to 290-315 ° C. It is generally not more than 10BAR. Try to avoid temperature above 300 ° C. The lower the back pressure, the better, avoid wear. Do not use too long stay time to avoid decline in molecular weight.
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