Application :
Microblend preparatiions are used to produce polyolefin masterbatches. Their Outstanding dispersion qualities make them suitable for colouring:
1) Fibres
2) Tapes
3) Films
4) Blow mouldings
5) Injection mouldings
Because of their excellent properties, Microblend preparations can be incorporated by both premix and split-feed techniques. It is sufficient to use simple dispersing equipment, for example single – screw extruders.
Microblend preparations also offer advantages with twin screw extruders, including greater output and instant uniformity of shade.
Masterbatches can be produced by various methods :
1) Fibres
2) Tapes
3) Films
4) Blow mouldings
5) Injection mouldings
Because of their excellent properties, Microblend preparations can be incorporated by both premix and split-feed techniques. It is sufficient to use simple dispersing equipment, for example single – screw extruders.
Microblend preparations also offer advantages with twin screw extruders, including greater output and instant uniformity of shade.
Masterbatches can be produced by various methods :
1) Direct method :
Readily dispersible masterbatches with high colour strength can be produced by simply mixing Microblend preparations with one another and pelletizing the blend. The Processing temperature must be kept relatively low. Temperatures of around 120ºC give good results. The most suitable temperature should be determined in preliminary trials under plant conditions.
2) Mixing with polyolefins :
The recommended method is to mix Microblend 1: 1 with the powdered
Polyolefin in a suitable mixer. The mixture can then be pelletized to masterbatches in simple extruders that do not have any special dispersing effect but homogenize efficiently.
3) Mixing with pigments :
Eupolen preparations can also be readily mixed with pure pigments used as shading components. The mixtures are then extruded with additional carrier resin by the usual processing techniques. In this case, however, good dispersing equipment is necessary.
Light fastness :
The light fastness ratings were determined on 0.06-mm PE film coloured with 2% Microblend preparation. The film was not UV-stabilized, although additional light Stabilization is necessary when polyolefin film is intended for outdoor applications. The light fastness was determined according to DIN 53 and evaluated on the 8-grade Blue wool scale (DIN 54004), in which 8 is outstanding.
Heat stability :
The heat stability is determined with a colorant concentration of 0.5 % in PE – HD. It is determined on a white reduction (organic pigments 1:10; inorganic Pigments 1:4) in PE-HD in an injection – moulding machine according to DIN 53772. The temperature of the melt is increasesd from 200ºC to 300 ºC in steps of 20ºC with a 5-minute interval between each step. The heat stability is the highest temperature at which there is no noticeable change in shade (i.e. total colour difference ∆E*≤3.0).
Bulk density :
The bulk density figures are guideline values only.
Packaging :
25 kg PE sack in a carton.
Safety :
We know of no ill effects that could have resulted from using the Microblend preparations listed above for the purpose for which they are intended and from processing them in accordance with common practice.
