SPC uses raw materials and reference formula
| sequence number | name | amount | remarks |
| 1 | PVC five type resin | 75 | Ethylene process |
| 2 | Heavy calcium carbonate | 225 | 400 ~ 450 mesh |
| 3 | Calcium Zinc Stabilizer | 6.5-8 | |
| 4 | TG60 | 0.9-1.8 | |
| 5 | PE wax 1 | 0.6 | |
| 6 | PE wax 2 | 0.3-0.5 | |
| 7 | ACR | 2.5 | |
| 8 | CPE | 4 | |
| 9 | Anticontraction agent | 2-5 | |
| 10 | Return materials | 30-50 |
PVC： 50 KG
calcium carbonate ： 150KG
Calcium Zinc Stabilizer： 3.5- 5KG
Ground asive (calcium zinc)：50
octadecanoic acid：0.8
ACR ：1.2
PE wax： 0.6
CPE： 3
IMPACT MODIFIER：2.5
druss：0.5
Formula points
1.PVC resin: using ethylene method five type resin, good strength and toughness, environmental protection.
2. The fineness of calcium powder: because of the large proportion of addition, it directly affects the formula cost, processing performance, the wear of the screw cylinder and product performance, so we cannot choose too thick calcium powder, and the fineness of calcium powder is beneficial to 400-800 items.
3. Internal and external lubrication: Considering the long high temperature residence time of the material in the extruder, as well as the performance of the material and the stripping force, it is recommended to use high performance wax to control the small amount of use, and use different wax to meet the initial and medium and long term lubrication requirements.
4. ACR: Due to the high content of calcium powder in SPC floor, high plasticizing requirements, in addition to the control of screw type and processing process, it is necessary to add additives to help plasticizing, and ensure that the melt has a certain strength, and has a certain ductility in the calendering process.
5. Toughening agent: the floor not only needs low shrinkage, good rigidity, but also needs a certain toughness, rigidity and toughness balance each other, to ensure the firmness of the lock, not soft at high temperature, and maintain a certain toughness at low temperature. CPE has good toughness, but the addition of large parts reduces the rigidity of PVC, vika softening the temperature, and leads to a large shrinkage rate.
6. Antishrinkage agent: Compress the particle gap between PVC materials to reduce excessive contraction due to temperature
7, PE wax is not only a lubricant, but also has a dispersion effect, but the amount of addition will affect the balance of internal and external lubrication and the melt strength, increase the shrinkage of the products and reduce the stripping force, the products become brittle.
8. Return materials: try to use the company's production return materials and post-processing recycled materials. Note: clean, not wet, batch broken and mixed after grinding. In particular, the recovery material of the split tank must be mixed in proportion to form a closed return material for recycling. It is necessary to adjust the process formula of the test sample.
