Many silicone tubing manufacturers encounter this dilemma: using the same formulation, winter production tends to result in brittleness and slow molding, while summer production leads to soft products, mold sticking, and oil exudation. Seasonal variations in temperature and humidity directly affect raw material flowability and vulcanization reaction speed, making it difficult to consistently produce qualified tubing with a single fixed formulation.

The core conclusion is: silicone tubing does not require a complete change of the entire base formulation across seasons, but the proportions of auxiliary materials such as vulcanizing agents, silicone oil, and flow aids must be adjusted according to seasonal temperature and humidity changes.

Common Summer Issues and Countermeasures: When workshop ambient temperatures are high, raw gum and silicone oil flowability increases, and vulcanizing agent decomposition accelerates. Without formulation adjustments, localized over-cure, silicone tubing stickiness, and demolding difficulties easily occur. At the same time, high air humidity makes raw materials prone to moisture absorption, which can also cause internal bubbles and pinhole defects in the tube wall. Countermeasures include: moderately reducing the silicone oil addition ratio, fine-tuning vulcanizing agent dosage to lower the vulcanization rate, and incorporating a small amount of mold release aid to improve demolding performance.

Common Winter Issues and Countermeasures: In low-temperature environments, silicone rubber raw material hardness increases, flowability deteriorates, and vulcanization reaction efficiency drops significantly, making incomplete vulcanization, poor tubing resilience, and easy tensile fracture prone to occur. Countermeasures include: appropriately adding a small amount of flow aid and slightly increasing vulcanizing agent content to accelerate the crosslinking reaction; if the plant experiences extreme temperature differences between winter and summer, or if raw materials stored outdoors show significant temperature differences between north and south, low-temperature-specific raw gum can also be used to improve extrusion molding results.

It must be emphasized that any formulation adjustment will affect certain physical properties. The principle for adjustment is: as long as the process objective is achieved and the physical properties remain within customer requirements, it is a viable solution. In addition to adjusting vulcanizing agent and silicone oil dosages, appropriately adding anti-scorch agents or switching to slower accelerators are also viable options.

Furthermore, the mixing process also requires seasonal fine-tuning: in summer, mixing time can be appropriately shortened or cooling water temperature lowered to prevent compound scorching; in winter, mixing time can be appropriately extended or cooling water temperature raised to ensure uniform mixing.

In summary, only by fine-tuning formulations to adapt to environmental changes can silicone tubing hardness, resilience, and surface condition be stably controlled, reducing defects such as mold sticking, bubbles, and stickiness, and ensuring consistent product performance year-round. It is recommended that enterprises establish seasonal formulation adjustment records and archives, accumulating optimal ratio data under different temperature and humidity conditions to provide a basis for continuous optimization.