Explanations of the terms
The value quoted gives an indication of the consistency of the lubricant only. It helps primarily in the choice of a lubricant for a particular job, in respect of the application process used.
Apparent Dynamic Viscosity
Even lubricants with same penetration values can have widely-different viscosities. For this reason, we quote for our lubricants the apparent dynamic viscosity at + 25° C and a shear rate of 300 s-1, in mPa.s (cP), using a rotation viscosimeter. The data of apparent dynamic viscosity take the place of our earlier ratings of retarding power.
The assessment of ductility is made in accordance with standards developed and owned by us. The more ductile a lubricant, the lower the risk of tearing the lubricant film.
The test is made in accordance with DIN 58397, part 1. The lower the evaporation loss of a lubricant, the lower the danger that vapours will condense on optical surfaces inside a closed system. A low evaporation loss also implies good resistance to ageing, independent of the effects of any additives.
The test is made in accordance with DIN 58397, part 2. In our data, the spreading is tested at a temperature of 70° C. The lower the quoted value “Sp”, the lower the spreading trend to the lubricant.
Operating Temperature Range
The temperature at which a lubricant has to perform satisfactorily is principally governed by the temperature of its operating environment. It should be noted that the temperature ranges quoted by us are based on laboratory conditions. The absolute limits of the temperature range can only be found by testing the lubricant on the particular components in a climatic chamber.
Because of the multiplicity of the offered types of plastic it is hardly possible to examine with each individual case whether the intended plastic is steady to the necessary lubricant or not. Due to the chemical structure of the LOSIMOL lubricants and the behavior of the used substances can be assumed however nor the plastics specified by us are chemically steady neither are angeloest against the LOSOID mentioned of lubricants and anquellen. The shatter crack stability depends also, apart from application temperature and internal voltage condition, on the mechanical load infrage of the coming plastic foreign body.
Here following experience applies: the lower these factors, the better the stability. We recommend our customers in principle to accomplish appropriate attempts under conditions in line with standard usage in order to receive a final proof for the compatibility.