Product overview
3M™ SP7533 high-performance water-based screen-printable pressure-sensitive adhesive (Screen-Printable Adhesive)
3M™ SP7533 is a high-performance water-based dispersion pressure-sensitive adhesive developed specifically for screen-printing processes. This product provides excellent peel strength, shear strength and environmental aging resistance while, supporting precise and fine printing of complex patterns. SP7533 Non-flammable when wet, high solid content design brings excellent coating rate and low loss advantages, which can widely replace the traditional double-sided tape die-cutting process to achieve fast screen gluing with free graphics.
Core advantages and features
Precise screen-printing with extremely low loss: Supports the printing of complex shapes and fine patterns, with clear edges. Compared with traditional die-cut tapes, it greatly reduces material waste and labor time costs.
High solid content and high coating rate: Up to 65% solids content, the coating is full and the film is dense, providing reliable initial grip and lasting stickiness.
Environmentally friendly water-based system: Using water as carrier, completely non-flammable when wet, the workshop operation is safe and non-toxic, and improves the working environment.
Excellent heat resistance and anti-aging properties: Withstand high and low temperature and humidity and heat aging (withstand 80°C and 60°C/95% RH long-term test strength does not decrease but rises), excellent static load holding capacity.
Broad material compatibility: Excellent adhesion to metals such as stainless steel and aluminum, as well as ABS, PVC, polycarbonate (PC), and PET polyester films.
Typical application scenarios
Electronics and Touch Interfaces: Membrane Switch, key panel, touch panel, display window bonding.
Digital and smart hardware: Precision fixing of smart phones, handheld terminal equipment, home appliance control panels and nameplates.
Industrial and Automotive Interiors: Complex adhesive lamination of automotive interior trim strips, audio equipment, and foam padding.
Technical parameters
| Performance indicators | Test standards/conditions | Parameter specifications |
| Product model | — | 3M SP7533 |
| Adhesive system | — | Water-based dispersion pressure-sensitive adhesive |
| Appearance color | Visually | Milky white viscous liquid |
| Solids content | — | 65% |
| dilution carrier | — | Water |
| proportion | 25°C | 1.05 |
| viscosity | rotational viscometer | 28, 000 - 40, 000 CPS |
| pH value | neutral system | 7.0 |
| shelf life | 5°C-35°C sealed storage | From the date of leaving the factory 12 months |
Adhesion and weather resistance (test reference)
180° peel strength (100μm PET film / 35μm adhesive layer thickness, baked at 50°C for 24 hours):
Stainless Steel:2.9 kgf/25mm (6.4 lb/in)
PVC base material:2.4 kgf/25mm (5.3 lb/in)
ABS resin:1.3 kgf/25mm (2.9 lb/in)
Polycarbonate (PC):1.3 kgf/25mm (2.9 lb/in)
Environmental aging resistance (PET/ABS bonding, 180° peel test):
Initial strength (25°C): 1.3 kgf/25mm
80°C high temperature for 1000 hours: intensity increased to2.5 kgf/25mm
60°C / 95% RH high temperature and humidity 1000 hours: keep at1.5 kgf/25mm
Heat Resistant Static Shear Load Test (Dead Load Test):
Hanging weight 1 kgf: temperature resistance up to77 °C
Hanging weight 0.5 kgf: temperature resistance up to＞ 130 °C
Screen printing construction and process suggestions
Use directly: Open the barrel and print directly,It is strictly prohibited to add water to dilute, do not add chemical additives such as defoaming agents.
Stirring instructions: It is normal for slight liquid stratification to occur during storage. Use low-shear mechanical stirring (or small-dose manual stirring) to mix evenly before use.
Screen mesh selection: Recommended 70 mesh ~ 150 mesh (#70 ~ #150) stainless steel wire mesh, polyester mesh or nylon mesh.
Photosensitive adhesive selection: Since this adhesive is a water-based dispersion, screen photosensitive adhesive needs to be used Water-resistant photosensitive emulsion (Such as acrylic or diazo water-resistant photosensitive adhesive).
Adhesive back management: Please store the excess adhesive remaining from screen-printing separately.Never return to original bucket.
Storage and protection instructions
Antifreeze and heat protection: Must be stored in the original sealed container, and the storage temperature should be controlled at 5°C-35°C between (not exceeding 40°C),No freezing.
Sealed to prevent drying: After use, the lid must be tightly closed at all times to prevent water loss and skin formation on the surface.
