Hywelt Chemical — Products · Industries · Technology · Quality · Support · Resources · About · Contact
Technical resources for converters and formulators
Answer-first technical articles, product selection and application guides, troubleshooting checklists, and TDS/SDS/COA document entries from Hywelt Chemical.
Technical articles
- How to improve ink adhesion on PET film: PET film rejects water-based inks when surface energy, treatment decay or binder selection is wrong. This guide gives the screening order used by converting engineers: treatment check, contamination check, then binder and primer selection.
- Water-based vs solvent-based gravure ink: what actually changes when you convert: Converting gravure printing from solvent to water-based ink changes drying physics, substrate requirements and process control. Compare them on the parameters that drive your line: energy, surface treatment, speed and residuals.
- Choosing an ink resin for PVC decorative film: what to specify before you buy: PVC decorative film printing is specified by what happens after printing — lamination heat, film flexibility and plasticizer content. Define those three inputs and the resin family narrows itself.
- Drying and cure troubleshooting for water-based inks: a line-side checklist: Slow drying and soft films in water-based printing trace to energy delivery, film weight or dilution balance. Run this checklist before changing the ink.
- Lamination bond failure: find the failing interface before changing the adhesive: Bond failures in film lamination are diagnosed by the interface that fails first. Peel the structure, name the layer, and the corrective action becomes obvious.
- Plasticizer migration in flexible PVC printing: mechanism and screening: Plasticizer migrating from flexible PVC into the printed layer causes softening, staining and blocking. Understand the mechanism and the screening that keeps it out of your process.
- From sample request to machine trial: how industrial material testing actually works: A structured sample and trial process is what separates a real material evaluation from a drawer of samples. This guide explains the four stages and what to prepare at each.
- TDS, SDS, COA: what a chemical buyer should expect from a materials supplier: Technical data sheets, safety data sheets and certificates of analysis do different jobs. Knowing what each document can and cannot tell you prevents costly assumptions in supplier evaluation.
Hangzhou Hywelt Chemical Technology Co., Ltd. — four manufacturing bases (Hangzhou, Lishui, Linyi, Guigang) and the Hangzhou Hywelt Research Academy.