The Adhesion of Thermoplast Is Reversible
Plastic is a simple two syllable words. But do not let that fool you. Plastic is a simple term that is very complicated when deeper. In our plastic work, we learned a lot from our research to the lab. All the very valuable knowledge, which is helping us achieve the goal of turning waste plastics into new objects.
Plastic can be divided into two categories. Thermosets and thermoplast. Thermosetting plastic is a polymerized polymer that can be permanently inhaled in place. Epoxy and vulcanized rubber are two common examples. Once thermoset materials are formed, they can not be decomposed or recycled.
On the other hand, thermoplast can be recycled because the bonding in this type of plastic is reversible so that they can be heated and modified. That's why we like the thermoplast, which gives us the opportunity to re-use the material. Thermoplastics are most commonly marked below them, for example soda bottles will have # 1 within the recovery triangle. This number specifies the plastic series, and that family there are thousands of different grades of plastic, all of which are called # 1. For # 1, # 2, # 3, # 4, # 5, # 6 and # 7, this is correct. The last category # 7 is to capture all other types of plastic. ABS belongs to this category. In all these categories, there are many different chemical composition and physical properties. Some thermoplast are stronger, some lighter, some more bent, some more heat resistant.
Thermoplast typically have less electrical losses than thermosetting materials, and the electrical properties with time and temperature are less varied than thermosetting materials. Unlike thermoplast, thermosetting materials can be oxidized over time. The oxidation process may lead to changes in the dielectric constant (Dk) and dissipation factor (Df) of the PCB material, resulting in a change in RF / microwave frequency performance.
© 2016 Pinghu Zhanpeng Hot Melt Adhesive Web & Film Co., Ltd. All Rights Reserved. Web support by : HWAQ