R&D on High-performance Soft Tubes Used for Air Conditioners of ContiTech Made a Breakthrough

25 December 2017 | Source from China Rubber Journal

In order to meet automobile manufacturers’ requirement of the soft tubes of automobile air conditioner systems equipped with both low NVH (noise, vibration and harshness) and low refrigerant permeation, and by fully understanding clients’ needs and the idea on system designing, the R&D team of ContiTech Qingdao factory has redesigned product structures and rubber formulae, continuously explored experiment methods and improved experiment equipment, and finally made a major breakthrough in such aspects as NVH and permeability of air conditioner soft tube and air conditioner system matching, finishing R&D of new products of A45 (three-layer structure) and 488X (five-layer structure) series.

This R&D result has been recognized by mainstream automobile manufacturers worldwide, among which the super-low NVH air conditioner soft tube of A45 series is favored by electric vehicle manufacturers. 488X series products can satisfy the permeation requirements of both R134a refrigerant in China and the latest R1234yf refrigerant in Northern America and the European market. The actual testing data: R134a: 0.9kg/(m2•year), R1234yf: 0.1kg/(m2•year). The SAE J3062 standard requires refrigerator permeability to be below 5kg/ (m2•year) and the super-low permeability standard to be below 1.5kg/(m2•year), reaching the standard for permeability and super-low permeability and making it at the top of the industry. 

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