According to data and practical verification, there are many factors affecting the discoloration of PC lamp covers. The fading of colored plastic products is related to the light fastness, oxidation resistance, heat resistance, acid and alkali resistance of pigments and dyes, as well as the properties of the resins used. During the production of color masterbatches, pigments, dyes, surfactants, dispersants, carrier resins, and anti-aging additives can only be selected after a comprehensive evaluation of the above properties. The following are common causes of product discoloration and related performance characteristics, provided for reference.
According to data and practical experience, there are many factors affecting the discoloration of PC lamp covers. The fading of colored plastic products is related to the light fastness, oxidation resistance, heat resistance, acid and alkali resistance of pigments and dyes, as well as the characteristics of the resins used. During the production of color masterbatches, pigments, dyes, surfactants, dispersants, carrier resins, and anti-aging additives can only be selected after a comprehensive evaluation of the above properties. The following are common causes affecting product discoloration and related performance characteristics, provided for reference.
PC lamp covers—what is the production process like? Some sales colleagues are not very familiar with the production process of PC lamp covers, and when communicating with customers, they are unsure how to explain the process, which can be quite awkward. Today, the editor will discuss the production process of PC lamp covers with everyone. If you have better methods, you are also welcome to provide feedback to our company.
There are many packaging tube manufacturers in the market. Packaging tubes are products that can reach market saturation, while also enabling high-quality packaging tubes to establish their market advantages. Among various products, we always value their strengths, because only by highlighting these advantages will more people be willing to purchase them, thereby creating market value and competitive advantages. It is within such values and advantages that the market can be further expanded. Therefore, when facing such packaging tubes, we should better understand their practicality—for example, their use in e-cigarettes or for food packaging—so that their functions can be fully utilized.
Both of these materials are PCTG materials. PCTG is a transparent plastic and an amorphous copolyester. The commonly used comonomer of PCTG is 1,4-cyclohexanedimethanol (CHDM). Its full name is poly(ethylene terephthalate-1,4-cyclohexanedimethanol). It is produced by the polycondensation of three monomers—terephthalic acid (PTA), ethylene glycol (EG), and 1,4-cyclohexanedimethanol (CHDM)—via a transesterification process. Compared with PET, it contains an additional 1,4-cyclohexanedimethanol comonomer, and compared with PCT, it contains an additional ethylene glycol comonomer. Therefore, the properties of PCTG are quite different from those of PET and PCT. PCTG is a non-crystalline copolyester. As the CHDM content in the copolymer increases, the melting point decreases, the glass transition temperature increases, and the crystallinity decreases, eventually forming an amorphous polymer. The CHDM content in PCTG is greater than 50%.
