Spc flooring, namely PVC stone plastic flooring, is a relatively hot product at present. It is made of PVC resin and highly filled calcium powder, and various additives combinations, after high-speed mixing extrusion calendering online lamination cutting annealing UV treatment slitting slotting system. SPC flooring is an emerging product, equipment, materials, processing technology and formulations are being improved. This article will explain the substrate processing of 7mm spc flooring and the application of new materials in detail.

The main performance requirements of 7mm spc flooring

1. There is a low shrinkage, warpage and good toughness.

2. To ensure that the various environments are not easily deformed and better locking tension and a certain peeling force between the substrate and the membrane. The performance mainly depends on the material type component processing process equipment capability to determine.

The processing requirements of 7mm spc flooring.

1. Since the extrusion volume of 7mm spc flooring production line is relatively large, and the film needs to be compounded online, the stability of continuous production is quite important.

2. Since 7mm spc flooring is highly filled, the screw wear is serious, and the screw value is relatively high, so the impact of screw life on the total cost must be considered.

3. Since 7mm spc flooring is relatively thin, thickness tolerance is required to be small, and extrusion speed is fast, so good material dispersion, plasticizing performance, and flowability are required.

Processing equipment for 7mm spc flooring

1. High wear resistance, extrusion pressure is relatively low plasticization better screw barrel.

2. Reasonable design of the die with uniform material discharge.

3. Multi-roller calendering system with simple operation and adjustment and precise thickness control.

4. Precise and reliable film guiding and force control correction system.

5. Sufficient cooling space and capacity.

6. Cutting and moving can not adversely affect the appearance of the plate and the degree of warpage.

7. manufacturer selection: not one-sided pursuit of production, but according to their own plate thickness range to choose the size of the machine. 80/92/110 to adapt to different thickness ranges of plate production, the general configuration of 1:2:1 or 1:3:1 is more reasonable.

(The size of the extruder and the thickness of the plate should be reasonably matched)

7mm spc flooring formulation points

1. PVC resin: the use of vinyl method five resin, strength toughness is better, environmental protection.

2. Calcium powder fineness: because the addition of a large proportion directly affects the cost of the formula, processing performance, and screw barrel wear and product performance, so you can not choose too coarse calcium powder, calcium powder fineness to xxx mesh for the benefit.

3. Internal and external lubrication: Considering the long stay of the material at high temperatures in the extruder, as well as the performance of the material and the factor of peeling force, it is recommended to use high-performance wax to control a smaller amount of use, and use different wax to meet the initial and medium and long-term lubrication requirements.

4. Plasticizer: Due to the high content of calcium powder on the SPC floor, the plasticization requirements are high. In addition to the screw type and processing process control, it must help plasticization by adding additives and ensuring that the melt has a certain strength and elasticity in the calendering process.

5. Toughening agent: the floor needs low shrinkage, good rigidity, and a certain degree of toughness. The need for rigidity and toughness balance each other to ensure the solidity of the lock. High temperatures do not soften, and low temperatures maintain a certain degree of toughness. Traditional CPE has good toughness, but adding a large share of the situation reduces the rigidity of PVC and Vicat softening temperature and leads to a larger shrinkage rate.

6. Dispersant: Since there are more components and the proportion of calcium carbonate added is relatively large, it is important to infiltrate and disperse the calcium carbonate and disperse the components. The dispersion can improve not only the processing performance but also the product's performance, improve the demoulding cycle, reduce and delay the wear and tear of the screw barrel.

7. Return material: try to use the company's production of return material and post-processing of recycled material. Need to pay attention to clean, not wet, batch crushing co-mingling after grinding powder. Especially the slitting slotted recycled material, must be proportionally co-mingled grinding powder, forming a closed recycling of return material. Large changes in the amount of recycled material added need to carry out trial samples to adjust the process formula.

7mm spc flooring processing technology and control

1. Formulation and weighing. Different weight materials must use the corresponding precision scales to ensure weighing accuracy.

2. Mixing material storage. Note that there are differences in the mixing effect of different mixers and in mixing temperature and time.

3. Extrusion process. Process settings affect the processing level, product quality, and production efficiency. Need to combine equipment characteristics, material properties, recipes together with comprehensive consideration.

4. Calendering and laminating process. Under the premise of extrusion stability.

5. Sizing and others. Since the product during production is not yet fully set, the cutting flow avoids stress and the carrying tray needs to be solid and flat. Product testing also requires that the substrate and finished product be set aside until a certain time for sampling.

In general, only a full understanding of the product quality and processing requirements, combined with equipment, materials, reasonable design of the formula and processing process, to master their role and the relationship between the relationship and impact, you can balance the quality of the product, production efficiency, the cost of the formula, processing costs of these elements.

The above is about 7mm spc ground of the board substrate processing and the application of new materials. If you need a more detailed understanding, welcome to contact us!