Plasticizer content in PVC - Guangyuan Ruifeng New Materials

Category: Plasticizers (popular science, no products)

Release Time: 2020-07-10

Summary: Depending on the application, PVC plastics are often classified as follows: unplasticized PVC (plasticizer content: 0%); rigid PVC (plasticizer content: <10%); semi-rigid PVC (plasticizer content: 10-30%); flexible PVC (plasticizer content: 30-70%); and PVC paste resin (plasticizer content: >80%).

Depending on the application, PVC plastic is often classified as follows: unplasticized PVC, plasticizer content is 0; hard PVC, plasticizer content is less than 10%; semi-hard PVC, plasticizer content is 10-30%; soft PVC, plasticizer content is 30-70%; PVC paste plastic, plasticizer content is 80% or more. (750 plasticizer, environmentally friendly plasticizer, how to use PVC crosslinking agent)

Export PVC plasticizer content: Prior to December 7, 1999, the EU issued a temporary ban 1999/815/EC (2004/178/EC extended this temporary ban for the ninth time), prohibiting the use of six phthalates (DINP, DEHP, DNDP, BBP, DBP) in soft polyvinyl chloride toys that children under three years old may put in their mouths, and the content cannot exceed 0.1% of the total weight.

1. PVC Plasticizer

The main function of plasticizers in combination with PVC is to reduce the melting temperature and melt viscosity of the polymer, thereby reducing its molding processing temperature; to make the polymer products have softness, elasticity and low-temperature resistance. In short, the main purpose is to improve the required physical properties. The type and concentration (i.e., content) of the plasticizer are the two main factors that affect these properties.

Different amounts of PVC plasticizer produce different effects: First, when the amount of PVC plasticizer is less than 10 parts, the effect on mechanical strength is not very obvious. However, it should be noted that when about 5 parts of PVC plasticizer are added, the mechanical strength is the highest, which is the so-called anti-plasticization phenomenon. (750 plasticizer, environmentally friendly plasticizer, how to use PVC crosslinking agent)

From the above reasoning, it should be clear that generally hard products do not need to add PVC plasticizer or only a small amount is needed. In some cases, in order to improve the processing fluidity, a few parts of PVC plasticizer will be added. However, if it is a soft product, a large amount of PVC plasticizer needs to be added. Because for soft products, the larger the amount, the softer the product.

Therefore, to summarize, the total amount of PVC plasticizer should be added according to the requirements of the softness of the product, the application, the process and the use environment. In our daily calendering process production of PVC film, the total amount of plasticizer is about 50 parts. The blown film is slightly lower, generally about 45 parts is enough. (750 plasticizer, environmentally friendly plasticizer, how to use PVC crosslinking agent)

2. Environmentally Friendly Plasticizer

Selection Requirements for PVC Plasticizers:

(1) Select according to the hardness of the product. For hard products, the amount of plasticizer added is generally 0-5 parts, for semi-hard products, it is 6-25 parts, for soft products, it is 30-70 parts, and for paste products, it is 60-100 parts;

(2) Synergistic selection of main and auxiliary plasticizers;

(3) Select according to the performance requirements of PVC products, such as whether non-toxic, cold-resistant, insulating, antibacterial, biodegradable, etc. are required;

Considering the cost factor of reducing PVC products, inexpensive plasticizers such as epoxy fatty acid esters, epoxy soybean oil, DOTP, and glycerol esters can be selected. (750 plasticizer, environmentally friendly plasticizer, how to use PVC crosslinking agent)

Keywords: Plasticizer content in PVC - Guangyuan Ruifeng New Materials

Related Solutions

Previous: What is the specific function of PVC plasticizers? -- Guangyuan Ruifeng New Materials

Next: No more!

Guangan///Guangyuan,Guoyuan///Guangyuan,Ganguan///Guangyuan

Sorry，当前栏目暂无内容!

您可以查看其他栏目或返回 首页

Sorry，The current column has no content!

You can view other columns or return Home