Visicryl 7290 is a high-performance styrene-acrylic copolymer emulsion manufactured by Visen Industries
The TDS highlights excellent adhesion to aluminum foil, OPP, PET, and treated polyethene films. visicryl 7290 tds
| Process | Recommended Parameters* | |---------|--------------------------| | | Melt temp 280‑300 °C; die gap 0.8‑2 mm; line speed 80‑150 m min⁻¹ | | Thermoforming | Preheat 130‑150 °C; form temp 180‑200 °C; draw ratio ≤3:1 | | Laser Cutting | CO₂ laser, 30‑40 W, 0.1 mm kerf; minimal melt‑back due to low melt viscosity | | CNC Machining | Feed 120‑180 mm min⁻¹, spindle speed 12 000‑18 000 rpm; use carbide tools | | Adhesive Bonding | Use acrylic‑based or epoxy adhesives; surface prep: IPA wipe, 30‑s dwell | | Welding | Hot plate welding at 260 °C; ultrasonic welding possible at 20 kHz, 4 kW | It indicates the temperature at which the polymer
| Property | Typical Value (±5 %) | Test Standard | |----------|----------------------|----------------| | | 1.20 g cm⁻³ | ASTM D792 | | Tensile Strength (MD/TD) | 70 MPa / 65 MPa | ASTM D638 | | Elongation at Break (MD/TD) | 120 % / 115 % | ASTM D638 | | Flexural Modulus (25 mm) | 2.5 GPa | ASTM D790 | | Impact Strength (Izod, notched) | 600 J m⁻¹ | ASTM D256 | | Heat Deflection Temperature (HDT, 0.455 MPa) | 115 °C | ASTM D648 | | Service Temperature Range | –40 °C to +120 °C (continuous) | Manufacturer data | | Coefficient of Thermal Expansion (CTE) | 70 × 10⁻⁶ °C⁻¹ (in‑plane) | ASTM D696 | | Water Absorption (24 h, 23 °C) | ≤0.2 % | ASTM D570 | glassy state to a soft
Closely related to Tg, the MFFT is the lowest temperature at which the emulsion particles will coalesce to form a continuous film.
The Tg is perhaps the most critical technical parameter for any acrylic polymer. It indicates the temperature at which the polymer transitions from a hard, glassy state to a soft, rubbery state.