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MORE INFO
Two-component PU foam. Resin (component A, X kg) + hardener (component B, X/2 kg). Flexible curing.
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For scenographic work and prototypes. Also for filling (flexible) moulds. The soft PU foam is mainly used in the furniture and automotive industries.
APPLICATION
The PU foam reacts differently depending on the temperature of the chemical components (A+B) and the mould. Please ensure that the temperature is set correctly before each use in order to achieve the desired reactivity and viscosity. We recommend carrying out a test before the actual casting. Stir components well before use. Only work with dry tools and containers.
Depending on the desired foam hardness, mix component A (resin) and component B (hardener) in a weight ratio of 100:50 (g) to 100:100 (g) by hand or with a machine to form a homogeneous mass. Pour immediately into a dry mould that has previously been treated with a release agent. Cure at room temperature. To improve the surface, the foam can be poured into a heated mould.
At a mixing ratio of 100:50, the PU compound expands by a factor of 15 to 20 during foaming, depending on the temperature of the starting materials and the temperature of the mould; at a mixing ratio of 100:100, the expansion is slightly less.
TECHNICAL DATA
| Properties of | Component A | Component B |
| Viscosity at 25 °C | 750 mPas | 375 mPas |
| Colour | transparent | brown |
| Density | 1.2 g/ml | 1.22 g/ml |
| Mixing ratio A:B (g) min. | 100 | 50 |
| Mixing ratio A:B (g) max. | 100 | 100 |
| Reaction | |
| Expansion in air | max. approx. 15 - 20-fold |
| Mould temperature | 20 °C to 35 °C |
| Temperature of the components | 20 °C to 30 °C |
Reaction times at different temperatures of components A & B (laboratory situation: room temperature 22 °C, 100 g component A + 83 g component B, 6 seconds mixing in a 200 ml measuring beaker)
| Product temperature | 22 °C | 35 °C |
| Creamy state after mixing | 30 seconds | 10 seconds |
| Start of expansion | 90 seconds | 60 seconds |
| End of expansion | 120 seconds | 70 seconds |
| Free density | 45 g/l (0.045 g/ml) | 43 g/l (0.043 g/ml) |
Depending on the mixing ratio of component A and component B, different foam hardnesses can be set. The following can be used as a rough guide:
| Mixing ratio | Comp. A | Comp. B |
| Cushion | 100 | 60 |
| Armrest | 100 | 80 |
| Seat | 100 | 90 |
| Very stable foam | 100 | 100 |
From 24 August 2023, appropriate training must be provided prior to industrial or commercial use
PU foam soft COMPONENTS A:
Classification according to Regulation (EC) No 1272/2008: Not classified as hazardous according to GHS/CLP guidelines.
PU foam soft COMPONENT B:
The product is subject to labelling according to GHS/CLP guidelines. Labelling according to Regulation (EC) 1272/2008:
GHS07, GHS08
Signal word: DANGER
Contains: 4,4'-methylenediphenyl diisocyanate
H315 Causes skin irritation. H317 May cause an allergic skin reaction. H319 Causes serious eye irritation. H332 Harmful if inhaled. H334 May cause allergy or asthma symptoms or breathing difficulties if inhaled. H335 May cause respiratory irritation. H351 Suspected of causing cancer (if inhaled). H373 May cause damage to organs (respiratory tract) through prolonged or repeated exposure (if inhaled).
P201 Obtain special instructions before use. P261 Avoid breathing dust / fume / gas / mist / vapour / spray. P264 Wash hands, forearms and face thoroughly after handling. P280 Wear protective gloves / protective clothing / eye protection / face protection. P304+P340 If inhaled: Remove person to fresh air and keep comfortable for breathing. P342 + P311 If respiratory symptoms occur: Call a poison centre or doctor. P405 Keep locked up.
EUH208 Contains isocyanates. May cause an allergic reaction.
