Liquid Resin Drying Process Monitoring

Moisture Control Blind Spot Leads to Batch Rework: Traditional manual sampling and lab testing are delayed, failing to capture real-time changes in resin drying water content. Liquid resin drying requires water content to be controlled between 0.5%-1%. In conventional methods, samples are taken manually every two hours, with lab testing taking 40 minutes, resulting in data feedback nearly three hours after the drying process continues. For example, during one batch, water content rose to 1.2%, but delayed test results meant the issue was only detected after two hours, requiring 500kg of resin to be reworked due to excessive moisture.

High-Risk Sampling Triggers Dual Contamination Risks: Manual sampling involves contact with the production process, posing both operational safety and sample contamination risks. The drying equipment outlet reaches temperatures of 80-100°C, and opening the sealed dryer for sampling risks burns from splashing hot resin. Additionally, sampling tools exposed to ambient air may introduce dust or impurities, contaminating samples and skewing test results. In one case, a factory's sample was contaminated with impurities during sampling, leading to a false passing result for water content, resulting in cured resin with bubbles.

Moisture Fluctuations Undermine Quality Control: Untimely water content monitoring causes finished product quality variations, impacting resin yield. Excessive water content reduces cured resin strength, while overly low levels lead to brittle cracking. In traditional monitoring, water content fluctuates between 0.3%-1.5%, with a finished product qualification rate of only 78%. In one instance, delayed monitoring allowed water content to drop below 0.3%, causing an entire 2-ton batch to be scrapped due to brittleness, incurring losses exceeding $10000.