Polyethylene glycol PEG-800 is a nonionic water-soluble polymer with high chemical stability and safety (CAS No.: 25322-68-3). Problems that may arise in practical applications are usually related to improper storage, mismatched process parameters, or formulation compatibility, rather than quality defects of the product itself. When encountering usage issues, it is recommended to first conduct a basic check against product technical parameters, then contact Guoli Chemical for professional technical support.
As the product supplier, Guoli Chemical has a comprehensive after-sales technical service team that can provide customers with formulation optimization suggestions, process parameter adjustment guidance, and product selection alternatives. Although there is no public technical support hotline or email in the database, you can directly contact the technical department through the Guoli Chemical official website, the sales manager corresponding to your purchase channel, or the contact information on the product packaging label, and you can usually get a professional response within 1-2 working days.
Before contacting technical support, you can first perform a quick self-check against the following common issues:
| Problem Phenomenon | Possible Cause | Solution Direction |
|---|---|---|
| Product caking or discoloration | Humid or excessively hot storage environment; although PEG-800 has low hygroscopicity, improper sealing can still cause moisture absorption | Store in a cool, dry place at temperature ≤40°C, seal containers promptly; if already deteriorated, replace with a new batch |
| Slow dissolution rate or undissolved material | Water temperature too low or insufficient stirring; average molecular weight of the product is 700~900, requiring some dissolution time | Use warm water at 40~60°C for dissolution with moderate stirring; check for contamination with impurities |
| Stratification or instability in formulation | HLB value mismatch with other surfactants or ingredients (PEG-800 HLB value is 20) | Adjust compounding ratio or replace with an emulsifier matching its HLB value; consult Guoli Chemical technical team for formulation advice |
| Unsatisfactory lubrication or mold release effect | Insufficient dosage or process temperature beyond product applicable range | Refer to recommended dosage (typically 1%~5% of formulation); use in molten state (melting point 28~32°C) for better effect |
| Poor hand feel in textile softening treatment | Inappropriate sizing or softening finishing process parameters | Adjust bath ratio, temperature, and time parameters; confirm compatibility with subsequent dyeing process |
When the above self-check cannot solve the problem, it is recommended to follow these steps: