PVC foam board surface curved

PVC foam board surface curved

Cause analysis：Uneven material flow or inadequate cooling.The main factors of uneven material flow are large traction fluctuations or unbalanced dosage of internal and external lubricant in the formula. Solution:Fisrtly to eliminate the machine factor, and then adjust the formula.Under the premise that the dosage of external lubricatnt is as little as possible,adjust the internal lubricant,meanwhile to ensure uniform cooling.During the production process, the water temperature of the die is generally controlled at 30-40°C, and the water temperature of the shaping table is generally controlled at 15-20°C, which is the best range.

2023-02-19

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Yellowing in the middle of the boards

Yellowing in the middle of the boards

Cause analysis: a.Charging barral and mold temperature are high b.Lubricant is not matched well c.The thickness of the board is too thick d.Thermal Dissipation of AC blowing agent exothermic core layer is slow e.The stability of the stabilizer is not good Solution: a.To adjust the mold temperature. b.To choose high-efficiency lubricants and adjust lubrication collocation c.To reduce the dosage of AC blowing agent and increase the dosage of NC blowing agent on thick boards d.Choose a stabilizer with better heat stability.

2023-02-19

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Yellowing of PVC foam boards surface

Yellowing of PVC foam boards surface

Cause analysis：The extrusion temperature is too high and the stability of the stabilizer is insufficient. Solution：To adjust the processing temperature,if there is no improvement,the formula can be adjusted,and the dosage of stabilizer and lubricant can be increased appropriately, which can be changed one by one, so that it is easy to find out the problem quickly and solve the problem at the fastest speed.

2023-02-19

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Cells in cross section

Cells in cross section

Cause Analysis:Insufficient melt strength,there are two reasons, one is overdosage of blowing agent or the proportion is not coordinated,or the qulity problems of foam regulator. The second is poor plasticization, low processing temperature or overdosage of lubrication. Solution: a.To adjust the dosage of blowing agent and replace with a better foam regulator. b.To adjust the processing temperature. For details,please feel free to contact our company.

2023-02-19

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Board thickness is uneven

Board thickness is uneven

Cause Analysis: a.Discharge was uneven b.Flow rate was too fast c.Overdosage of external lubricant and shortage of internal lubricant d.Mold temperature setting is unreasonable Solution： a.To adjust the height of the die lip b.To adjust the choke rod c.To adjust the formula d.To adjust the mold temperature. For details,please feel free to contact our company.

2023-02-19

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Introduction of Quality Oxidized polyethylene wax prices china

Introduction of Quality Oxidized polyethylene wax prices china

Quality Oxidized polyethylene wax prices china is made of polyethylene wax after oxidation by a special oxidation process. Quality Oxidized polyethylene wax prices china can be used as a dispersant, lubricant, brightener, and coupler concentrating agent or for fillers Color masterbatches, polypropylene masterbatches, additive masterbatches, and filling masterbatches.

2023-02-17

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Brief introduction of Customized Oxidized polyethylene wax from China

Brief introduction of Customized Oxidized polyethylene wax from China

Customized Oxidized polyethylene wax from China is an excellent new type of polar wax. Since the molecular chain of oxidized polyethylene wax has a certain amount of carbonyl and hydroxyl groups, the compatibility with fillers, pigments, and polar resins has been significantly improved. Customized Oxidized polyethylene wax from China has better wettability and dispersibility in polar systems than polyethylene wax, and it also has coupling properties.

2023-02-09

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