Today, Jiangsu Kunzheng as PVC plastic sheet manufacturers will introduce PVC sheet. Now, with the rapid development of science and technology, the building materials industry and flooring have presented a new development. pvc flooring has added new members to the flooring family. As a product of the high-tech era, green environmental protection, low cost, cost-effective are its characteristics. PVC sheet is one of the main types of hard PVC conical twin-screw extrusion production. The common problems in the production process are: bubbles, crystal points, sheet color yellow and so on. Below, Xiaobian will introduce the causes and solutions of sheet yellowing in detail.

First, the reason for the yellow sheet:

1. The stability of PVC sheet is poor.

If it's fresh. PVC sheet may be resin manufacturer PVC itself poor stability, can replace PVC sheet try. However, even if the brand has been used, even if it is PVC sheet, it is possible that the PVC sheet resin itself is produced by the same manufacturer, because even PVC sheet, the quality of different batches may be different.

2. Insufficient stabilizer

If the temperature controller presents a problem, the apparent temperature is lower than the practical temperature, and the temperature is too high, the PVC sheet will decompose and turn yellow. At this point, you need to look at a more accurate temperature controller from scratch. This method is simple and more accurate with a mercury thermometer. In practical production, there is a distance between the apparent temperature of the temperature controller and the practical temperature.

Second, the sheet has small bubble reasons:

1.PVC sheet originally assumed that there is too much water, such as in summer rainy days, the material is damp, that is, the water may not be completely discharged from the cylinder, and the heat expands, and then bubbles are generated in the sheet.

2. In addition, the additives may also contain too much water.

To sum up, the solution can be selected: add the mixing time of the hot mixer appropriately, and choose the cooling mixer. It can effectively remove the moisture of the material.

The number of crystals in the 3 pieces overruns, also known as fish eyes

Some common causes of crystal points are: PVC sheet resin particles do not plasticize, or plasticize is not good. The reasons for this situation are: the quality of PVC resin itself is not good.

Third, without replacing PVC sheets in resin conditions, the solution is as follows:

1, add the appropriate mixing time, improve the mixing temperature, and promote the absorption of additives. And select a high-quality mixing unit, the mixing unit on the pre-forming effect of the material, is not replaced.

2, the mixed material can be placed half a ring or a day, let it mature, and then used.

3. The set temperature of the barrel can be appropriately improved, the screw speed can be added, and the head pressure can be added to further improve the plasticizing function.

4. In terms of formulation, we must carefully choose the appropriate additives and the amount of additives. Today, the additive market is chaotic and product quality varies greatly. We should choose carefully and find a better balance between price and function.

The above is the relevant content introduced to us by Jiangsu Kunzheng.