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Let's look at a public by the General Administration of customs classification decision classification decision number: Z2008-136
Name: double-sided tape
Product description: the product consists of four layers, material composition, from top to bottom are: release paper layer, adhesive layer, acrylic foam substrate layer, adhesive layer, and so on. Foam in the middle with absorption of dissipation energy substrate, buffer, dispersing the longitudinal shear stress, reduce the long-term stress of adhesive joints and so on. Main sealed with adhesive electronic components, auto parts, and so on.
Classification decision: in accordance with general rule number one and six, "two-sided adhesive tape" should be classified in tariff lines 3919.9090.
See the classification decision, the reader may ask, why is "tape", the main features are "sticky", why "cellulose wadding" as base materials classified in heading 3506, substituting "polyacrylate foam" (plastic) base are classified in heading 3919?

The answer is actually very simple, we are going to "cellulose wadding" substrate "tape" classified in heading 3506 is based on the general rule, according to "tape" main functions-"glue" are classified. And the General Administration of Customs will be "polyacrylate foam" substrate "tape" classified in heading 3919 is based on "general rule," instead of using the General rules. Issued by the General Administration of customs for the goods classified opinions, what part does not take into account the main function. But just based on the General rules, it made a clear classification for the goods. In other words, the General Customs Administration based solely on "heading chapter article and a class note or notes" had already determined the tax identification number of the goods.

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How the nose plates and screens built, its role is to filter the melt and increase the flow resistance, in order to filter out impurities and improve mechanical mastication effect.
Plates, profiles and pipes. 7, compound filter
In the manufacture of thin-walled rubber products, products in order to prevent the occurrence of leaks, leaking, plastic material can contain impurities, usually before adding the vulcanizing agent of rubber extruder filter, which is placed one or more layers of the filters in the nose to filter out impurities in plastics material.
8, tire treads and tubes manufacturing
Tread extrusion points overall and stratified extrusion. Available whole extrusion an extruder to a glue material through a flat die extrusion; also There are two compounds (crown materials and sidewall material) two extruders co-extrusion, in a co-extrusion machine combining into a whole within the first tread. Stratified by extruding the two extruders are two kinds of material extruded rubber tread and sidewall, and then in the heat conveyor belt fit, and by the more active roll disc as a whole. Extrusion and tube extrusion tube similar rear tire tube extruded, by cutting, molding and then fitting. 9, melt spinning
Some viscosity of the resin during melt spinning, molten material commonly used extruder. Good melt material directly through the filter into the spinnerets, or spinning pump into a spinneret. Extrusion blow molding
Blow Molding (also known as blow molding) is closed by means of gas pressure in the mold melt blown parison method of forming a hollow article, is the third most common type of plastic processing methods, but also the rapid development a plastics molding method. Blow molding mold only female mold (die), compared with the injection molding, low equipment cost, strong adaptability, can be good formability (such as low stress), it can be formed with complex undulating curve (shape) of the article .