Discussion on the performance problems and solutions of PVC color foam board?

PVC color foam board, as a new energy-saving material with polyvinyl chloride (PVC) as the main component, has been widely used in many fields such as building decoration, advertising display and automobile interior decoration due to its light weight, waterproof, moistureproof, acid and alkali corrosion resistance and flame retardant properties. However, in practical applications, PVC color foam board will also encounter some performance problems and challenges. This article will discuss these problems and their solutions in detail.

1. Performance Characteristics of PVC Color Foam Board

PVC color foam board uses PVC resin as the main raw material, and is produced through the process of adding additives, high-speed mixing, low-speed cold mixing, conical twin-screw extrusion, die forming, cooling and molding. Its surface is flat and smooth, with rich colors, which can meet the needs of different decoration styles. At the same time, PVC color foam board has excellent heat insulation and sound insulation properties, which helps to improve the energy-saving effect and living comfort of buildings. In addition, its high hardness and mechanical properties, as well as good weather resistance and corrosion resistance, make PVC color foam board perform well in many fields.

2. Common Problems and Solutions of PVC Color Foam Board

Yellowing board surface

During the use of PVC color foam sheet, the sheet surface sometimes turns yellow. This is usually caused by reasons such as too high extrusion temperature, insufficient stability of the stabilizer, poor initial coloring or over-plasticization. To solve this problem, measures can be taken to reduce the processing temperature, and the formulation can be adjusted to select stabilizers with good initial color and good thermal stability. At the same time, the lubrication system can be adjusted, high-efficiency lubricants can be selected, and plasticization can be properly adjusted to reduce the occurrence of yellowing.

Bending of sheet surface

During the processing or use of PVC color foam sheet, the sheet surface sometimes bends. This is mainly caused by uneven material flow or insufficient cooling. To solve this problem, it is necessary to check whether the cooling water channel is unobstructed so that the board surface is cooled evenly. At the same time, check the traction machine to stabilize its traction speed and adjust the amount of lubricant to balance the lubrication to ensure the flatness of the board surface.

Bubbles or bubble layering on the cross section

PVC color foam board sometimes has bubbles or bubble stratification on the cross section. This is mainly due to insufficient melt strength, which may be caused by too much foaming agent, too little foaming regulator or an unbalanced ratio of the two, as well as poor plasticization, low processing temperature or excessive lubrication. To solve this problem, it is necessary to adjust the dosage of foaming regulator and foaming agent, and select foaming agent with higher melt strength and viscosity. At the same time, appropriately reduce the dosage of external lubricant PE wax and appropriately increase the temperature of the barrel to make plasticization better.

Uneven sheet thickness

During the processing of PVC color foam sheet, the sheet thickness is sometimes uneven. This may be caused by uneven ejection or improper die adjustment. To solve this problem, the die lip opening can be adjusted, and the flow control rod can be adjusted if the flow rate is too high. At the same time, adjust the formulation. In general, more internal lubrication makes the center thicker, and more external lubrication makes the material run faster on both sides. Adjust the dosage of internal and external lubricants according to actual conditions to ensure uniform board thickness.

3. Conclusion

PVC color foam board has been widely used in various walks of life due to its excellent performance and diverse applications. However, in practical applications, some performance problems and challenges are also encountered. This article proposes appropriate solutions to the common problems of PVC color foam board, such as yellowing of the board surface, bending of the board surface, bubbles or bubble layering in the cross section, and uneven board thickness. These solutions are intended to help relevant practitioners better understand and deal with the problems encountered in the use of PVC color foam board to ensure its stable performance and extend its service life. At the same time, it also provides a useful reference for the further development and application of PVC color foam board.