The film is transparent and soft · Wire breaks are neat and there are few bubbles · Speaker PP dust cover and rubber edge are specially used · Excellent cold resistance and aging resistance
1. Product Overview
DA3188G (DIABOND DA3188G / DA3188C) It is a high-performance styrene-butadiene rubber (SBR) series solvent-based one-component adhesive developed by Shanghai Nokawa Chemical Industry. Specially designed for industrial assembly scenes that have strict requirements on appearance transparency, adhesive application process and post-cured vibration resistance flexibility.
The film formed by this product is transparent and soft, has fast initial adhesion and is not prone to excessive solvent penetration into plastics.When gluing, the broken wires are clean and crisp, and less bubbles are generated.After complete curing, it has outstanding low-temperature toughness (the strength does not decrease but increases at -20°C) and heat-aging self-reinforcement properties.It is particularly suitable for the structural assembly of electroacoustic speaker components, as well as the high-strength bonding of various heterogeneous materials such as transparent panels, films, rubber and metals.
2. Core performance and technical advantages
The film is transparent and beautiful, suitable for light-colored/transparent substrates:
The cured adhesive film is highly transparent and flexible, and does not affect the appearance and texture of the adherend. It is especially suitable for transparent plastic plates, films, or key components that require a transparent appearance for the adhesive layer.(Note: The exposed parts may turn slightly yellow over time).
Fast drying, high initial viscosity, and anti-plastic penetration:
Dry to the touch in only about 2 minutes, fast fitting and positioning, and the formula is specially formulated to prevent excessive solvent swelling and erosion of the plastic matrix.
Good filament breakage, few bubbles, and smooth dot coating:
The adhesive has good fluidity, no stringing or flying wires when applying adhesive or dispensing, and there are few bubbles inside the adhesive layer, which greatly reduces the defective rate of dispensing.
Self-reinforcing properties of adhesive force after heat aging:
After undergoing the heat aging test, the peel strength did not decrease but increased (steel plate/cotton canvas reached 105 N/25mm, ABS/aluminum plate up to 100 N/25mm), the molecular binding is tighter and stronger.
Polar grade cold resistance (-20°C not brittle):
Tested in a low temperature environment of -20°C, the peel strength is as high as 84 ~ 88 N/25mm, completely avoiding brittle degumming during severe cold and alternating hot and cold conditions.
3. Physical and chemical properties and physical parameters
| Test items (Item) | Technical indicators (Properties) | Test Conditions/Standard Specifications PDF |
| Main ingredients | Butadiene Styrene Rubber (SBR) | Synthetic rubber elastomer system |
| Appearance traits | Light yellow transparent viscous liquid | After curing, a transparent and soft film is formed. |
| Solid content (%) | 43 ± 2% | High solid content formula, small shrinkage rate |
| Viscosity properties | 5, 000 - 10, 000 mPa·s | at 20°C, rotational viscometer |
| Dry time to touch | about 2 minutes | at 20°C, quick drying at room temperature to form a film |
| Sticky retention time (open time) | about 20 minutes | at 20°C, ample error tolerance window for lamination operation |
| flash point/fire point | Flash point -17°C / Autoignition point 260°C | Closed cup flash point (flammable liquid) |
| Softening temperature (JIS K 6833) | 1 day 65~70°C | 3 days 70~80°C | 5 days 80~90°C | Load 500g, canvas mutual adhesion test |
| Shelf Life | 6 months | Store sealed and protected from light at 25°C |
| Dangerous goods classification | Class 4 Petroleum Class 1 (non-water soluble liquid) | Hazard level 2 |
4. Severe test peel strength data (JIS K 6854 standard)
Test standard: Peel strength test in accordance with Japanese national standard JIS K 6854
Test unit: 10N / 25mm (converted to common international units: 2.8 or 28 N/25mm; CR: neoprene, TM: acrylic coated steel plate)
| Curing test cycle and environmental conditions | Steel plate/cotton canvas (Fe/Can) | ABS plastic / aluminum plate (ABS/Al) | Neoprene/Coated Sheet (CR/TM) PDF |
| Normal curing for 1 hour (initial bonding) | 2.8 (28 N/25mm) | 3.5 (35 N/25mm) | 1.2 (12 N/25mm) |
| Normal curing 24 hours | 5.2 (52 N/25mm) | 4.5 (45 N/25mm) | 2.2 (22 N/25mm) |
| Normal curing 48 hours | 7.0 (70 N/25mm) | 5.8 (58 N/25mm) | 3.0 (30 N/25mm) |
| Normal cure 96 hours (full cure) | 8.2 (82 N/25mm) | 7.3 (73 N/25mm) | 3.9 (39 N/25mm) |
| Thermal Aging Test (Long-Term Environmental Stability) | 10.5 (105 N/25mm) | 10.0 (100 N/25mm) | 7.8 (78 N/25mm) |
| Heat resistance test (80 °C) | 1.0 (10 N/25mm) | 0.9 (9 N/25mm) | 0.7 (7 N/25mm) |
| Cold resistance test (-20 °C extremely low temperature) | 8.8 (88 N/25mm) | 8.4 (84 N/25mm) | 4.2 (42 N/25mm) |
5. Typical recommended application scenarios
Speaker and audio component assembly (core recommendations): Especially suitable for speakers PP dust cover the fit, and Rubber hems and metal basin rack/plastic bracket buffer seal bonding.
Transparent plastic panels and films: Suitable for laminating transparent plastic panels, nameplate windows, protective films, etc. that have requirements on light transmittance and appearance.
Universal bonding of multiple materials: Permanent composites between fiber fabrics, leather, wood, paper and various rubber and metal materials.
⚠️ Material taboos:
Polystyrene foam (foam board) is easily corroded by solvents and needs to be fully verified before use.;
Direct bonding is not recommended for difficult-to-bond substrates such as phenolic resin, nylon, silicone rubber, and polyethylene (PE).
6. Standard gluing construction and safety precautions
Cleaning the adhered surface: Completely remove oil, release agent, moisture and dust impurities from the surface.
Double-sided coating: Use a brush or dropper to apply adhesive evenly to both bonding surfaces..The coating amount on one side is controlled at 150~200 g/m² (the total coating amount on both sides is 300~400 g/m²).
Drying and fitting: Dry at room temperature 5 to 10 minutes, wait for the solvent to evaporate appropriately, align and fit, and apply sufficient pressure to make it fit tightly.
Safe work: Flash point is -17°C, working area Fireworks and sparklers are strictly prohibited; Install exhaust ventilation device, workers wear organic gas respirators and labor protection gloves; Please use toluene for cleaning utensils; Stored in 5°C-35°C Closed and cool warehouse.
