Understanding the material
PU adhesive selection should connect substrate compatibility with the factory’s application and activation equipment. A two-component system introduces a hardener and a finite working life after mixing. A one-component product has a different processing requirement. Neither designation alone establishes bond strength, temperature resistance or suitability for every sole material.
Product Identity & Specifications
Chemical identity, physical characteristics and key specifications for Polyurethane Adhesive (PU Adhesive).
| Parameter | Description / value | Basis / application |
|---|---|---|
| Material identity | Polyurethane adhesive | Formulated product, not a single pure chemical |
| Supplied presentation | Solution or dispersion grade | Identify the exact grade |
| Polymer / carrier | Declared in product documentation | Compatibility and handling |
| Solids content | Non-volatile fraction, % | Method and test conditions required |
| Viscosity | Specified flow or rotational measurement | Temperature, instrument and speed matter |
| Density | Mass per unit volume | State the measurement temperature |
| Substrate compatibility | Actual material pair | Include surface finish and treatment |
| Application method | Brush, roller or spray as qualified | Grade-specific equipment suitability |
| Open / assembly time | Specified working window | Film thickness and ambient conditions matter |
| Drying / activation | TDS-defined conditions | Do not transfer settings between grades |
| Bond performance | Initial and conditioned strength | Agreed test method and failure mode |
| Shelf life / packing | Current manufacturer information | Closed original packaging |
Identity and published standard
Adhesive specification and ASTM D903 bond testing
Prepared adhesives are formulation-specific mixtures. ASTM D903 provides a published method for comparing peel or stripping strength under defined test conditions; it does not set one universal pass value for every adhesive. Agree the substrate pair, conditioning and acceptance requirement for the selected grade.
View published test-method scopeThe current TDS, agreed test conditions and product quality documentation define the offered adhesive.
For further information and current COA/specification, please contact us.
Request current COA & specificationApplications & functional benefits
Footwear bonding
Evaluate suitable PU systems for the chosen upper and sole combination. Include substrate preparation, primer and activation conditions in the trial.
Textile and leather assembly
Selected formulations can produce flexible bonds between compatible materials. Assess coating penetration, appearance and handling strength for the intended product.
Synthetic-material components
PU systems can be evaluated for compatible synthetic surfaces. Plasticiser exposure, surface treatment and ageing behaviour should form part of qualification.
Choosing the appropriate bonding system
| Grade / form | Main distinction | Selection consideration |
|---|---|---|
| One-component system | Used according to its supplied formulation | Confirm activation and final performance requirements. |
| Two-component system | Mixed with a specified hardener | Control mixing ratio, pot life and cure conditions. |
| Waterborne PU dispersion | Different carrier and drying behaviour | Match equipment and drying capacity to the formulation. |
Formulation & processing
Use the specified surface treatment
Select abrasion, cleaning and primer steps for the actual substrate. Different sole polymers may require different preparation even with the same adhesive.
Control activation and assembly
Follow the TDS temperature and timing requirements. Check the bond-line condition and production timing rather than relying only on an oven setting.
Manage mixed-material working life
For two-component grades, use the specified hardener and mixing ratio. Record mixing time and do not use material beyond its validated pot life.
What to check in the specification
- Solventborne or waterborne system; one or two components
- Substrate treatment and activation conditions
- Viscosity, solids and application coverage
- Pot life if mixed with hardener; final bond and heat resistance
Current product documentation
Request the current TDS, SDS, specification and available batch COA or quality certificate. Include both substrate materials, surface preparation, application equipment and service conditions so the offered grade can be assessed.
Request documents for Polyurethane Adhesive (PU Adhesive)Packing, storage & handling
Packing and quotation details
Discuss the required net weight, sample quantity and delivery schedule with SBS. Packaging should be compatible with the material and carry product, manufacturer and batch identification. Confirm the offered pack size and shelf-life or retest information in the quotation; these depend on the selected grade.
Storage and safe handling
Keep the material in compatible, closed packaging under the manufacturer’s stated conditions. Use the current SDS to set ventilation, personal protection and fire precautions; storage and shelf life depend on formulation.
Frequently asked questions
Is PU resin the same as PU adhesive?
No. Resin is a raw material; a prepared adhesive includes the formulation needed for application.
Do all PU adhesives require hardener?
No. The requirement depends on the selected system and target performance.
What should I provide for grade selection?
Share substrate identities, surface treatment, activation equipment, application method and heat or ageing requirements.
Technical information sources
Need more information?
Contact SBS for further product details, current COA, specification, packing and a quotation for your requirement.
Contact SBS for details and documents