Ongoing quality control is essential, P.U. Tech offers advice  on these procedures as well as full trouble shooting for safety and equipment.

Slab stock (which includes Maxfoam or Vertifoam) Single box foamers Moulding

Involves (if requested by customer) the setting up of labs according to Standard and if necessary to ISO standards. This involves the equipment necessary and facility arrangements. The scope of the research and development needs.

In last few years three new and distinct processes have been designed.

Variable Pressure Foaming (VPF):

A process based on continuous Maxfoam slab-stock foaming which is produced in an enclosure in which the pressure can be accurately controlled. The principal behind the process is simple. It takes into account that atmospheric pressure has considerable effect on foam density even within normal weather pattern limits. Therefore operating at pressures significantly above or below atmospheric can therefore produce a wide range of foam densities from a single formulation. VPF technology has been the co-operative development of Reticel, Beamech and Foamex. These three companies have formed a company named Prefoam AG to license the technology.

Carbon Dioxide Injection:

A process which uses an injected liquid Carbon Dioxide stream as an auxiliary blowing agent to supplement the use of water as the main blowing agent. Canon-Vicking were the first to commercially introduce available machinery through their CarDioTM equipment. Since then the equipment has become available form Beamech and Hennecke. The equipment is relatively simple and inexpensive and is available as a complete foaming machine, in a very compact unit. Alternatively it is available as a retrofit kit for use with existing plants. The CarDioTM process is licensed via Interlicon (UK).

Accelerated Cure Systems:

This process consists of the forced air cooling of freshly produced foam blocks to reduce the block temperature to a point where the risk of oxidative degradation (schorching) is effectively eliminated. This operation has been carried out within a few minutes of the foam being produced. The process allows higher water levels to be used and therefore low densities can be obtained. There is an environmental advantage with a forced cooling system as the system is totally enclosed and the process gases can be easily trapped and treated. The fire-hazard, while manageable, remains a major disincentive.