Pvc Profile Extrusion Process

Material : PVC SG-5 Color :Origin Fire rating:UL 94 V0 Size:40mm*8mm Thickness : 1.3mm Weight :200g/meter Length:1000mm Under what circumstances pvc profile extrusion process toxic and why does it turn yellow? PVC plastic is a commonly used plastic, and currently many products are……

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Material : PVC SG-5

Color :Origin

Fire rating:UL 94 V0

Size:40mm*8mm

Thickness : 1.3mm

Weight :200g/meter

Length:1000mm

Under what circumstances pvc profile extrusion process toxic and why does it turn yellow?

PVC plastic is a commonly used plastic, and currently many products are obtained by processing PVC plastic. However, many people are concerned that PVC plastic may be toxic and affect health. So in what circumstances is PVC plastic toxic? Why does PVC plastic turn yellow? Today, the editor will provide a detailed introduction on “Under what circumstances is PVC plastic toxic and why does it turn yellow?

Under what circumstances is PVC plastic toxic?

1. Due to the inherent shortcomings of PVC materials, people need to add a large amount of additives to stabilize PVC plastic. In fact, pure PVC plastic is non-toxic, but after being modified with a large amount of additives, PVC plastic undergoes a chemical reaction under the combined action of multiple additives to produce toxic substances. This means that these additives can make PVC plastic become a softer chemical additive called phthalein, After using a large amount of PVC plastic, it has a significant impact on the internal kidneys, liver, and other organs of the human body.

2. PVC plastic includes urea formaldehyde and melamine formaldehyde. If our reaction is not complete when pvc profile extrusion process and manufacturing PVC plastic, it will lead to the presence of a large amount of free formaldehyde in the PVC plastic, which is a type of cell plasma toxin. If we use bowls made of PVC material to hold hot food, it can easily cause certain cells to deteriorate after consumption, which is detrimental to human health, Another thing is that PVC plastic contains chlorine, and when we burn it, it produces a toxic substance that pollutes the environment.

2、 Why does PVC material turn yellow?

1. Production process issues

During the pvc profile extrusion process, it is subjected to heating and shear effects from screws and barrels. If the process is not properly set, it can to some extent cause PVC to decompose and turn yellow. The solution is as follows:

(1) Reducing the temperature of the material barrel appropriately can improve the yellowing phenomenon.

(2) Reducing the engine speed within an appropriate range and increasing the feed ratio can reduce shear and make the material in the screw groove mix more evenly. The stabilizer can fully play its role, thereby reducing yellowing.

(3) Improper startup methods can also cause yellowing of products, and restarting may solve this problem.

2. Formula issues

This situation usually occurs when the PVC turns yellow after replacing a batch or manufacturer of a certain additive. The solution is as follows:

(1) Increase the content of stabilizer.

(2) Adjust the balance of internal and external lubricants.

(3) Solve yellowing by adding pigments or adding a PVC specific fluorescent whitening agent.

(4) By adding ultraviolet absorbers to enhance anti-aging effect, it provides long-lasting protection against fading and yellowing!

FAQ:

1.How are your extruded profiles produced and manufactured?

Our extruded profiles are produced through processes such as mold shaping, cooling, traction, and cutting after the plastic particles are heated and melted in the extruder.

2.What are the performance advantages of your extruded profiles?

Our extruded profiles have performance advantages such as high strength, corrosion resistance, insulation, environmental protection, UV resistance, outdoor use, and high fire resistance, which can meet the needs of different fields.

3. Which countries can you export to?

There is no limit on which countries, as long as there are secure, mutual trust, and reliable payment terms, we can export cooperation to all countries around the world.

Contact us to obtain a quotation about pvc profile extrusion process！