When setting standards around “why hydrolysis is due to lack of PET and PBT drying”, the core does not look for a fixed parameter, but rather identifies a reusable process window. The key mechanism for this topic is that polyester materials are water-sensitive at melting temperatures, and small amounts of water can cut the molecular chain and reduce viscosity. Hydrological management encompasses drying capacity, spot, layer, transport and back-tide control, and the endpoint is the effective determination. Therefore, the name of the material and the recommended setting can only be used as a starting point, and the actual judgement is to return to the plate number, water, filling and assistor, the single total quantity, cycle, screw structure and product requirements to confirm whether the temperature, cut and stay of the material in the equipment is safe.

At the test-model or volume-import phase, an input list should be established around “why hydrolysis of PET and PBT deficiencies”, including feedstock suppliers and batches, technical data tables, dry conditions, colour mother and retrofit ratios, equipment and screw specifications, product and flow weight, mold temperature and existing defects. The test shall retain the raw material COA, the equipment type, the screw diameter, the single total volume, the cycle, the environmental humidity and the version of the parameters to ensure retroactive results. The main risks of this topic are that dry temperatures are inadequate, that the material is too thick or that there are insufficient spots to make the product fragile and difficult to detect through appearance. Parameters must be recorded in a specific pattern to distinguish material from equipment from operational changes.

Control methods should not begin with blindly increasing temperature or pressure, but should be based on "substance state - feed drying" The sequence of screw plasticization - nozzles and fluids - product results. When twisting, measuring time changes at the same time as the actual melting temperature, the material, feed and wear should first be sorted out and not compensated by an increase in temperature alone. The site adjusts only one main variable at a time, while observing the actual melting temperature, measuring time, screw twists, mats, injection pressure, product weight, colour, scent and critical dimensions. If production can only be sustained by extreme parameters, the use of a switch to cover the material or hardware boundary should be discontinued.

The validation of “why hydrolysis of PET and PBT deficiencies” suggests a repeatable method: detection of water content rates, characteristic viscosity, product strength and measurement of pressure before and after drying. A baseline should be established after the first eligibility and the water-bearing rate, melting temperature, measuring curves and critical energy should be measured by production tonnage. The technical agreement between the supplier and the plant shall state the material, the sampling method, the detection project, the permitted scope and the change notification requirements. The plasticization programme can only be considered to have long-term quantitative value if the product ' s probabilities, performance, cyclicality, energy consumption and maintenance costs are met in a continuous production process.