How to improve PVC pipe fitting Vicat?
Vicat is a soft hardness index of PVC pipe fittings. For PVC pipe fittings, the factors affecting Vicat are as follows:
I. formulation of PVC pipe fittings:
1. All kinds of lubricants reduce Vicat;
2. Liquid additives reduce Vicat;
3. CPE reduces Vicat;
4. Add Vicat in a certain range;
5. ACR additive increased Vicat;
6. Choosing suitable resin powder also has great influence on Vicat;
II. PVC pipe fitting technology:
Try to eliminate the internal stress of injection molding products, such as using multi-stage injection, maintaining appropriate mold temperature, annealing treatment of products, etc.
III. other methods to lift PVC pipe fitting Vicat
1. When CPVC resin is added, the Vicat softening point of pure CPVC resin is about 128 degrees. When CPVC composite is mixed, the Vicat softening point of injection grade is above 103 degrees, and the Vicat softening point of extrusion grade is above 110 degrees (the added lubricant and organotin stabilizer will reduce Vicat least). How much CPVC resin is added to CPVC pipe fittings to meet your requirements, you have to adjust yourself. The advantage is that the price is cheap, and the disadvantage is that the technology is difficult.
2. When PVDF resin is added, the Vicat softening point of pure PVDF resin is about 140 degrees, which can be added directly. It is the best without scorch, decomposition and weather resistance. The disadvantage is that the price is too expensive, and the advantage is that the technology is not difficult. We can consider to find some sub brand materials to reduce the cost.
3. Solid plasticizer is helpful to increase Vicat softening point temperature of PVC pipe fittings. There is no difficulty in technology. Adjust the formula properly.
4. The use of nano calcium carbonate filler can help PVC pipe fittings to improve Vicat softening point temperature. The performance is superior to light calcium or active calcium, which is a good choice. The color is also very good.
5. The use of PVC reinforcing modifier can help PVC pipe fittings to improve Vicat softening point temperature. Relatively speaking, some new additives can help a lot, more experiments, more summaries. There will be a solution.