Due to their versatility, semi-rigid integral skin polyurethane foams are used in different sectors for several applications.
Synthesia Technology manufactures integral skin polyurethane systems for sectors such as furniture, car industry or facilities protection.
Within the furniture sector, there are subsectors such as office furniture, industrial furniture, furniture for the tertiary sector or furniture for hospitals and nursing homes. The products in highest demand are chair bases, backrests and armrests.
Ergonomics and productivity
A proper body posture contributes to productivity. Studies on the subject show that ergonomic furniture has a positive impact on the productivity of the workers. Below, we offer recommendations on ergonomic furniture for professionals working with screens.
Depth between 40 and 45 cm and width from 40 to 50 cm. The leading edge should be slightly rounded in order to avoid pressure in the veins and the nerves of legs. The fabric of the seat and backrest should be breathable.
Chair seat height
Preferably adjustable to heights between 32 and 35 cm. The height will depend on the workers’ size, but the feet should rest entirely on the ground and that knees should form a 90 ° angle.
It must have a support to ensure resistance to overturning. Chairs with wheels allow greater mobility without forcing the posture. It must be rotatable and have five supports on the floor.
It must be adjustable in height, as it acts as lumbar support, and adjustable in its angle of inclination.The back should have some flexibility in order to pivot small angles on a fixed position, avoiding thus an excessive rigidity over the back and allowing a firm back support. It is also desirable that the support has a smooth prominence to support the lumbar region.
Synthesia Technology has a wide range of integral skin polyurethane systems for the furniture industry.
Synthefoam 7026 polyurethane system
Synthefoam 7026 system is a bi-component polyurethane system, prepared and formulated to obtain semi-rigid integral skin foams. The system is colourless. It contains no CFCs or HCFCs.
- Component A: Synthefoam 7026, composed of a mixture of polyols, catalysts, additives and stabilizing agents.
- Component B: Isocyanate 5700, MDI - modified diphenylmethane diisocyanate (MDI).
The systems are suitable for the production of integral foam parts with moulded density between 350-550 g/l.
They are especially indicated in the furniture industry (armrests, chairs, stools, etc.) and cars (gear levers, wheel trims, steering wheels, etc.).
The system can be prepared both in high (100-150 bar) or low pressure machines.
The recommended component temperature is 22 ± 2 ° C and that of the mould between 35 and 40 ° C.
Prior to its loading into the machine, the component A (polyol) should be homogenized for 5 to 10 minutes with a suitable stirrer.
The flow of the machine must be calculated based on the weight of the finished part and the reaction times of the foam; the product discharge must be done in a shorter time than that of the cream.
To achieve good quality in the finished part, the following factors must be taken into account : the mould design, the thickness and shape of the insert, the outlets of gases and the inclination of the mould.
The time needed to remove it from the mould is between 3 and 5 minutes, depending on the thickness and shape of the part.