A high viscosity TPE coated nylon PA.PA6.PA66 raw material
Source：德创化工Time：2020-03-30Hits：2844
In recent years, the application of TPE-coated nylon has become more and more widely used in kitchen utensils, electrical tools, auto parts, fitness equipment and other industries. In the actual product overmolding process, many friends have consulted online on how to improve the problem of TPE-coated nylon. In fact, as long as the following details are done, such problems can be solved.
At present, the formulation system of TPE coated with nylon has been developed and matured, but in order to realize the excellent coating of TPE and PA nylon, attention should be paid to the details of the process and formulation. Today, the editor will elaborate on five details that determine the effect of TPE-coated nylon:
Details-polarity and melting point
1. Different nylon materials have different melting points. In addition to basic polarity modification, the formula should also pay attention to the close melting point of TPE and encapsulated nylon. In this way, comprehensive consideration of physical properties and adhesion can be provided for TPE and nylon.
Details II Baking of Nylon Parts
2. For the rubber-coated mold and secondary injection molding, it is recommended to bake nylon parts in advance to remove moisture and facilitate bonding. It is recommended to bake the materials at 130-140 degrees and for 2 hours.
Detail 3 Die Design
3. Before opening the coating mold, the structure of the coating layer of the product shall be evaluated to see if it is favorable for TPE to quickly remove the coating and quickly spread and adhere on the surface of nylon parts. If necessary, one or two more glue feeding points can be opened so as not to cause any trouble at the back.
Details 4 Forming Temperature and Related Parameters
4. The previous formula design provides the material basis for overmolding. During overmolding, the molding temperature of TPE should be adjusted to produce melt erosion on the coated surface of nylon parts. Generally, the temperature of TPE encapsulation is 5~10 degrees lower than the molding temperature of nylon parts. In addition, other process parameters should be set properly to eliminate common product defects such as water streaks, drapes, shrinkage, etc.
Detail 5 Surface Treatment of Nylon Parts
5. For some users who require low cost TPE, some grooves or holes can be designed on the nylon part according to the structure of the product, so that TPE and nylon part can be compounded by mechanical force.
The above are some details about the processing technology of TPE-coated nylon that Dechuang Chemical Co., Ltd. has shared with you. I hope it will be helpful to you. If you have any other questions or need thermoplastic elastomer, you can call Dechuang Chemical directly!
