AAS resin

1.Material Overview

AAS resin is a thermoplastic polymer material formed by graft copolymerization of acrylonitrile, butyl acrylate, and styrene. This material is widely used in automotive exterior parts, outdoor electronic device housings, and building materials. Blending can further improve its heat resistance (heat distortion temperature can reach over 120℃) and low-temperature impact resistance, while also exhibiting excellent antistatic and solvent corrosion resistance.

2.Process Introduction

The drying system adopts closed-loop circulation process with nitrogen protection. AAS resin from the upstream process is fed into the 1st-stage fluid bed dryer (FBD). During the drying process, the nitrogen entering the FBD is effectively controlled, thus maintaining the stable fluidization state of the feedstock inside the FBD. Then it is fed into the 2nd-stage FBD for further drying. Dried product is discharged from the 2nd-stage FBD outlet through the discharge valve.

3. Technical Advantages

1) Utilizing closed-loop nitrogen circulation system with inert, sealed atmosphere can completely isolates oxygen, effectively preventing material oxidation.

2) The nitrogen circulation along with waste heat recovery ensures that hot air and nitrogen are not discharged externally, resulting in high heat utilization. Only a small amount of nitrogen needs to make up, and media loss and energy consumption are far lower than with open-loop nitrogen drying.

4. Technical Benefit

1）More stable product quality

Due to the closed inert atmosphere isolating external interference, combined with uniform temperature-controlled drying, materials remain free from oxidation and deterioration, resulting in high consistency in moisture content and quality, and significantly improved finished product qualification rate.

2)Lower overall operating costs

Closed-loop nitrogen recycling and efficient waste heat utilization significantly reduce energy consumption and nitrogen consumption; furthermore, the equipment has a simple structure and low failure rate, reducing daily maintenance and media usage costs simultaneously.

3)Environmental friendly protection

Fully enclosed operation eliminates waste gas and dust emissions, requiring no additional exhaust gas treatment equipment;

Continuous and stable operation can ensure large-scale production, reaching environmental standard without additional rectification risks.