DuCaFreeze compound meets broader temperature performance requirements and eliminates the need to strip dies for cleaning.
Using new generation stabiliser technology we have created a freeze compound with elevated temperature resistance that makes it suitable for use as a freeze or purge compound in rigid and flexible PVC materials across a wide range of applications.
It is easy to use and is so efficient that tooling does not have to be stripped down for cleaning.
Conventional non-lead purge and freeze compounds have thermal stability limitations which render them unsuitable for use in high end rigid PVC applications where processing temperatures can exceed 200°C.
DuCaFreeze can be used to purge material in the die while processing plant temperatures are being reduced. It can be left in the tooling and machine for extended periods. On start up the temperature is increased allowing DuCaFreeze to be purged through using standard material – saving both time and resources as the die does not need to be stripped down and cleaned. This has the knock-on benefit of reducing wear and the risk of damage to tooling caused by continuous disassembly, cleaning and reassembly.
Alternatively DuCaFreeze can be used as a conventional purge material that when cooled is easily removed from metal surfaces and intricate die flow paths – again minimising the potential for tooling damage.
DESCRIPTION: This material is highly stabilised and lubricated to enable it to be used as a ‘sleeping’ material.
PRODUCT FORM: Pellets.
COLOUR: Blue, to allow the purging compound to be differentiated from ‘normal’ materials being purged and for the operator to observe when sufficient material has been processed to allow a safe machine shutdown. Other colours may be available on request.
| Property | Test Method | Units |
Value
|
| Specific gravity | BS2782 620A | g/cc | 1.49 |
| Bulk density | Measured on pellet | g/cc | 0.90 |
| Thermal stability (Congo Red) | BS 2782 : Part 1, Method 130A | Mins. | >90 |
Injection moulders
“Excellent... more cost effective when compared to other polymers used historically such as PP and PS”
“Machine down times for colour changes used to take up to six hours, when moving from black to clears, and labour content was high too. We can now change some colours in 15 minutes”
Extruders
“Great when changing and cleaning tools and for clean downs”
“Effective for machine shutdowns for long periods”
“Efficient cleaning of simple and complex tools”
“Works equally well for quick colour changes and as a shut down freeze”
Sheet extrusion
“We cured a black speck problem on our clear PVC sheet extruders. DuCaFreeze was used to shut down and we were able to clean inside the machines without loss of major down time. It also prevented standard PVC from sticking to screws and dies”
Co-extrusion
“Considerably more efficient than stripping dies and machines to clear blockages and material build up in dies”
Record pressing
“We saved time by using DuCaFreeze to clean when changing from black to clears. Previously we continued running and made scrap products for several hours”
