Tritan is a high-performance copolyester material that is widely used in the manufacturing of daily necessities such as water bottles due to its excellent transparency, excellent impact strength, good chemical resistance and environmental protection. Its unique physical and chemical properties make it an ideal choice to meet the high performance and safety requirements of modern consumers.

Raw material preparation and drying
The production of Tritan water bottles begins with the selection of high-quality raw materials. These raw materials are usually in granular form and must be dried before processing to ensure that the moisture content is minimized. The drying process usually uses a dehumidifying dryer, and the set drying temperature is generally around 90°C, and the dew point needs to be controlled below -30°C to effectively remove moisture from the raw materials. This process is critical because excessive moisture content will have a negative impact on subsequent injection molding processing and final product performance, and may cause bubbles on the product surface or reduce mechanical strength.

Injection molding
The dried Tritan granules are fed into the injection molding machine to start the injection molding process. Injection molding machines usually use a three-stage screw design, with a recommended compression ratio of 2.5:1 to 3.0:1 and an aspect ratio of about L/D=18~20:1. The injection molding temperature needs to be precisely controlled between 260°C and 280°C to ensure that the material is fully melted and not overheated to prevent the product from becoming brittle. At the same time, the temperature of the injection mold is maintained between 30°C and 70°C through a water tower cooling system, which helps to quickly cool the injection molded parts and ensure the stability of their shape.

Injection stretch blow molding technology
For Tritan water bottles that require a hollow structure, such as insulation or cold bottles, injection stretch blow molding technology is usually used. This technology combines the two processes of injection molding and blow molding. First, the molten Tritan material is injected into the mold through an injection molding machine to form a preliminary bottle embryo. Subsequently, the bottle embryo is transferred to the blow molding machine to form the final hollow structure by stretching and blowing. In this process, the design parameters of the preform, such as the stretch ratio (recommended 1.1) and the radial blow ratio (optimal 1.4, up to 2.5), are crucial to the quality and performance of the product.

Fine processing and inspection
After injection molding or injection stretch blow molding, the Tritan water cup also needs to go through a series of fine processing steps, including deburring, edge trimming and surface grinding, to ensure that the product looks neat and feels comfortable. In addition, strict quality inspection procedures are indispensable, including dimensional measurement, appearance inspection and leak testing, to ensure that each product meets the established quality standards and safety requirements. Strict control of these links ensures the competitiveness of Tritan water bottles in the market and consumer satisfaction.