Sealing rings may be easy to categorize. Why do we need to analyze them? Mr. Wen has explained it to us before. First, let's review it.

Plastic sealing ring: 3926.9

Sealing ring made of vulcanized rubber: 4016.9

Sealing ring made of metal sheet and other materials: 8484.1

Today I will mainly introduce the sealing ring that I met in practical work. It seems simple, but it is controversial.

Commodity Description:

Name: Sealing Ring

Material: VMQ

Usage: It is used for sealing and waterproofing the crimping parts of conductors and terminals, and for protecting the insulation layer of cables from damage during crimping.

1. Ingredients: How can VMQ (methyl vinyl silicone rubber) be identified as 40 chapters of rubber?

2. Description of goods in compliance with Tax Rule 4016? Which chapter commentary or similar commentary meets Chapter 40?

3. Please also provide the process of specific ingredients? To judge, thank you!

Here is the material: VMQ, what is VMQ?

Methyl vinyl silicone rubber (VMQ), which is called vinyl silicone rubber for short, is copolymerized by dimethyl siloxane and a small amount of vinyl siloxane. The vinyl content is generally 0.1%~0.3%(mole fraction).  The introduction of a small amount of unsaturated vinyl group has greatly improved its vulcanization process and product properties, especially its heat aging resistance and high temperature compression resistance. The content of methyl vinyl siloxane unit has great influence on vulcanization and heat resistance of vulcanizate.

Basis of classification:

First, the product is a sealing plug, ingredients: VMQ (methyl vinyl silicone rubber), waterproof automotive connectors. 2. The product belongs to rubber seals and meets the commodity description of Tax 4016. It is recommended to be included under heading 40.16. 3. According to General Rules 1 and 6 of Classification, it is proposed to be classified into 4016931000.