For the two types of bend restrictor, polyurethane bending restrictor and bend stiffener, the main material they use is polyurethane elastomer.
This material has many excellent physical and chemical properties such as high strength, high elasticity, high modulus, high toughness, low density, corrosion resistance, hydrolysis resistance, and easy processing.
Due to the complexity of the application conditions of polymer bend limiters and bend preventers, polyurethane elastomers have become their main base materials.
In order to obtain high-quality anti-bend devices and polymer bend restrictor, it is necessary to study their manufacturing technology. At the same time, because both the anti-bending device and the polymer bending-limiting device are made of polyurethane elastomer, the research on their manufacturing technology can be carried out based on the molding process of polyurethane elastomer.
There are many types of polyurethane elastomer molding processes, including hot injection molding, thermoforming, blow molding, calender molding, mixing molding, pouring molding and so on.
These molding processes are similar to those of plastic and rubber molding.
Therefore, the molding process of polyurethane elastomers can be completed by referring to the plastic molding process and the rubber molding process.
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