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Bidding for hot melt adhesive granules, if the technical specifications are not clearly written, the goods will look the same and be overturned when they arrive. Below is thisList of 8 terms and conditionsCovering two commonly used adhesives for book binding and packaging, they can be directly copied into the procurement documents.
| Clause | Example of Book Binding Adhesive | Example of packaging sealant |
|---|---|---|
| softening point | 85±5℃ | 78±5℃ |
| Melting viscosity (160 ℃) | 2000–3500 mPa·s | 1500–3000 mPa·s |
| Opening hours | 10–18 s | 5–12 s |
| environment protection | Low odor SGS | RoHS、 Food Contact Grade |
Don’t just write ‘high-quality EVA hot melt adhesive particles’, as this vague term can be filled in by the supplier. Sunlife Hot Melt Adhesive (Guangzhou Sunlife Trading) provides customers with tender documents that are attachedTested parameter table+sampleWhen evaluating bids, taking samples for machine testing is more reliable than looking at paper parameters.
Q1: Do we need to write so detailed for small batch purchases?
You don’t need to copy everything, but the softening point, model, and substrate must be written, otherwise the delivery will not be accurate.
Q2: Why do we need to write the opening hours?
The mismatch between the opening time and the machine speed, which can result in weak adhesion or blocked grooves due to wire drawing, is the most easily overlooked key item in bidding.
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