external Lubricants
Advantages
- Excellent processibility
- Excellent dispersibility
Lubricants are divided into two areas, internal and external lubricants. The transition between external and internal lubricating effect is fluid, however, – internal lubricants often also have a certain external lubrication effect and vice versa. Lubricants having both effects are therefore called “combined lubricants”.
Internal lubricants reduce the frictional forces occurring between the PVC molecule chains, thus reducing melt viscosity. They are polar and thus are highly compatible with PVC. They help achieve excellent transparency even at high dosages and do not tend to exudate, which helps optimizing welding, gluing, and printing properties of the final product.
External lubricants reduce the adhesion between PVC and metal surfaces. They are mostly non-polar such as paraffin and polyethylene waxes. The external lubrication effect is largely determined by the length of the hydrocarbon chain, its branching and its functional group. At high dosages they can lead to cloudiness and exudation.
Applications
Type | BAEROLUB | Chemical composition | Physical form | Melting [°C] | Lubrication |
Solid fatty esters | L-MS | Glycerol partial ester of sturated fatty acids (glyceryl monostearate approx. 40 %) | Powder | 56 - 62 | Internal |
Solid fatty esters | L-CD | Glycerol ester of sturated fatty acids (Castor oil, hydrogenated) | Powder | 84 - 88 | Internal |
Solid fatty esters | GTS | Glycerol ester of sturated fatty acids | Powder | 50 - 54 | Combined |
Solid fatty esters | L-TP | Fatty alcohol phtalate | Powder | 46 - 50 | Internal |
Solid fatty esters | L-PM | Fatty acid ester wax | Powder | 52 - 55 | Combined |
Solid fatty esters | A275 | Fatty acid complex ester and fatty acid Calcium soap | Powder | 125 - 135 | Combined |
Solid fatty esters | 43C | Fatty acid complex ester | Powder Pellets | 59 - 65 | Combined |
Solid fatty esters | LS100 | Fatty acid complex ester | Powder Pellets | 58 - 65 | Combined |
Liquid fatty acid esters | L-PL | Glycerol partial ester of unsaturated fatty | Liquid | liquid at room temp. | Internal |
Liquid fatty acid esters | L-PK | Fatty acid ester | Liquid | liquid at room temp. | Combined |
Solid hydrocarbons | L-KO | Synthetic paraffin wax | Powder | 100 - 105 | External |
Solid hydrocarbons | L-KM | Paraffin wax | Powder | 54 - 56 | External |
Solid hydrocarbons | PA-L | Polyethylene wax | Powder | 102 - 110 | External |
Solid fatty acids, alcohol and amide | FTA | Mixture of fatty acids | Powder | 54 - 60 | External |
Solid fatty acids, alcohol and amide | FTO | Mixture of hydroxy fatty acids | Powder | 70 - 80 | External |
Solid fatty acids, alcohol and amide | L-OH | Mixture of fatty alcohols | Powder | 52 - 54 | Internal |
Solid fatty acids, alcohol and amide | L-AK | Amide wax (N,N'-ethylene distearamide) | Powder | 138 - 144 | External |
Metal soaps | Ceasit SW/PA | Calcium stearate | Powder | approx. 160 | Internal |
Metal soaps | Zincum T | Zinc stearate | Powder | approx. 120 | External |