General Evaluation Methods of High Resilience Silicone Oil
I. Stability test of silicone oil
1.1 Storage Stability Test of Silicone Oil
Storage stability of silicone oil at low temperature
Inject the silicone oil into a 1L glass bottle and place it in the refrigerator for 24 hours to observe if there is any delamination of the silicone oil. If it is not obvious, take out the silicone oil and the silicone oil at room temperature to do a comparative experiment to see if the structure of the silicone oil’s closed holes and vesicles is normal, and if there is any abnormality, it means that this kind of silicone oil can not be stored at low temperatures.
1.2 Storage Stability of Silicone Oil in Combination Materials
The new silicone oil and the original self-use of silicone oil with the same formula into a combination of polyether, under the same process conditions, foaming comparison of the expansion and vesicle situation, and then will be equipped with a combination of polyether were injected into a 1-liter glass bottle, placed in a 60-degree water bath, 6 hours after taking out the cooling, in the same kind of conditions, and then foaming, comparison of aging before and after the products of the expansion and vesicle situation, such as anomalies, it is shown that the If there is any abnormality, it means that the silicone oil is risky to be used as combination material.
Second, the activity of silicone oil evaluation
Process conditions: mold temperature 60 degrees, material temperature 25 degrees, the same demolding time. According to the approximate silicone oil activity given by the manufacturer, the silicone oil characteristics are determined by the degree of closed cell.
1, without equipment, can be used to open the amount of pore agent, to determine the activity of silicone oil.
2, can also be assisted by indentation hardness meter to determine the activity of silicone oil.
3, activity evaluation period: the various factors affecting the degree of occlusion should be considered thoroughly to avoid interference.
Third, the tolerance test of silicone oil
1, different systems, reduce the amount of silicone oil, test molding changes.
2、Molding temperature adaptability test.
3, fluidity test.
4, the same degree of closure, compare the product bubble structure, select the bubble more delicate silicone oil, in order to improve the actual molding production processing tolerance.
IV. Silicone oil VOC contribution test
1、Test method: VDA 278
2, and other silicone oil for comparison, with the exception of silicone oil, the same formula, the same process to produce samples, with VDA 278 comparison test data.
V. Summary
Combination of material manufacturers switch silicone oil is more cautious, but 3W silicone oil with excellent quality, more and more well-known combination of material manufacturers are familiar with the recognition, I think this and our strict testing methods are inseparable.
Above are some of the insights of our evaluation of silicone oil for your referenceTranslated with www.DeepL.com/Translator (free version)
