Is PVC a good material？

What is PVC material?

Polyvinyl Chloride (PVC) is a synthetic polymer made from vinyl chloride. As an engineering plastic, PVC offers numerous advantages, including:

• Excellent chemical stability

• Resistance to acids, alkalis, and moisture

• Aging resistance and flame retardancy

PVC is known for its good plasticity and affordability, making it widely used in various industries. However, it has certain limitations:

• Maximum usage temperature: 60°C

• Softening point: Up to 81°C

• Low-temperature brittleness: Becomes hard at lower temperatures

• Not suitable for food packaging: Difficult to clean, retains residues, and not recyclable

• Environmental concern: May release harmful substances when overheated or burned

  
  

Despite these drawbacks, PVC remains a popular material for non-food applications due to its versatility, low cost, and stable properties under normal usage conditions.

(Read more about TPE and NBR)

Hard vs. soft PVC

PVC can be divided into soft PVC and hard PVC. In general, hard PVC accounts for about 2/3 of the market, and soft PVC accounts for 1/3.

Soft PVC is generally used for floors, ceilings and the surface of leather, but because of soft PVC contains softener (this is also the difference between soft PVC and hard PVC), it is easy to become brittle and difficult to store, so its scope of use is limited.

Hard or rigid PVC does not contain softener, so it is flexible, easy to form, not brittle, non-toxic and pollution-free, and has a long storage time, so it has great development and application value.

The essence of PVC is a kind of vacuum blister film, which is used for the surface packaging of various panels, so it is also called decorative film, adhesive film, and is used in many industries such as building materials, packaging, and medicine. Among them, the building materials industry accounts for the largest proportion at 60%, followed by the packaging industry, and there are several other small-scale applications.

Pros and cons of PVC material

Pros

Rigid or hard PVC is one of the most widely used plastic materials. PVC material is a non-crystalline material. In actual use, PVC materials often add stabilizers, lubricants, auxiliary processing agents, pigments, impact resistance agents and other additives. These additives are mostly toxic, and it is the source that toxic substances come from, the raw PVC material is rarely poisonous. PVC material has non-flammability, high strength, weather resistance and excellent geometric stability. PVC has strong resistance to oxidants, reducing agents and strong acids. However, it can be corroded by concentrated oxidizing acids such as concentrated sulfuric acid and concentrated nitric acid.

Cons

PVC has poor flowability and a narrow processing window, which can make it challenging to work with—particularly in the case of high molecular weight PVC. This type of PVC often requires the addition of lubricants to improve its flow properties during processing. As a result, low molecular weight PVC is more commonly used due to its better processability.

Additionally, PVC exhibits a very low shrinkage rate, which contributes to its dimensional stability in finished products.

Generally speaking, PVC is a commonly used plastic. It is a resin composed of polyvinyl chloride resin, plasticizer and antioxidant, and it is not toxic itself. However, the main auxiliary materials such as plasticizers and antioxidants are toxic. Under normal circumstances, toxic gas will be released during high temperature or burning, that is what we need to be avoid.