Rigid PVC Pipe and Window Profile Market
Replacement of Lead stabilizer by Grandstab BS715 Ca/Zn Powder stabilizer.
1. The use of Lead stabilizer in PVC pipes has been attacked for many years because of its toxic nature. Grandstab BS715 Ca/Zn/Al/Mg powder stabilizer is used to replace lead stabilizer. Its advantages are as follows:
BS715 has good thermal stability;
BS715 is food contact approved (USA's FDA and Europe's 90/128/EEC);
BS715 contains no phenol, no heavy metals and no phthalates;
BS715 is odorless, while tin stabilizer has very bad odor;
BS715 is competitive in price;
BS715 does not have blackening problem when in contact with lead stabilized product, not to mention the problem faced by recycling;
BS715 makes a whiter base colored product than lead stabilizer;
BS715 is a fine white powder and is easy to use and is suitable for automatic feeding.
Sometimes tin stabilizer is used to replace lead in PVC pipe, however, it has a major problem, when tin stabilized pipe is in contact with lead stabilized pipe, blackening will occur. However, BS715 Ca/Zn stabilizer does not have this problem.
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On top of that, the weathering property of Ca/Zn is better than tin stabilizer.
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2. Recommended formula for Rigid PVC pipe and window profile.
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|
Rigid PVC Pipe / Window profile |
Ca/Zn formula |
toxic formula |
|
PVC suspension resin |
100 kg |
100kg |
|
Impact Modifier |
5 kg |
5 kg |
|
Processing Aid |
1 kg |
1 kg |
|
FIller, CaCo3 |
10 - 20 kg |
10 - 20 kg |
|
Grandstab BS715 Ca/Zn/Al/Mg stabilizer |
4 kg |
--- |
|
One pack lead stabilizer |
--- |
4 kg |
|
Pigment |
as required |
as required |
3. Stability Test Report of Grandstab BS715 compared with Lead stabilizer.
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