Thermoplastic Elastomer Modification—SBS/SEBS Compounding

The thermoplastic elastomer has the characteristics of high elasticity, high resilience and injection processing, and has the characteristics of wide hardness, soft touch, weather resistance, fatigue resistance and temperature resistance, superior processing performance, no need of vulcanization, and can be recycled and used for reducing cost.

The most common TPE is modified by SBS or SEBS blending. According to different hardness requirements, the ratio of SBS/SEBS,PP, filling oil is adjusted.PP provides rigidity. The increase of SBS/SEBS and filling oil can improve flexibility.

Feeding mode--Common feed for high mixer after premixing
SBS/SEBS,PP, filling oil, auxiliaries, etc are mixed uniformly in the high mixer, so that the filling oil is completely absorbed by SBS/SEBS.
Feed into twin screw extruder through feeder

Barrel L/D——L/D=44:1~52:1
Under normal conditions, L/D=48:1 can meet the needs of mixing. Side feeding, exhaust port and vacuum port will increase L/D of the barrel.

Pelletizing mode--Melt characteristics, process requirements.

According to the viscosity, strength, hardness and other technological factors of the melt, select the specific granulation mode, the most common is the water-cooled pull-type grain cutting; low hardness-water ring; melt easy adhesion-underwater pelletizing.

Process flow chart(steel frame platform+loss-in-weight feeder+liquid injection+pelletizing production line)

The core extruder equipment includes parallel twin screw compounding extruder, reciprocating

compounding kneader, double rotor compounding extruder, SCP high viscosity self cleaning

reactor and large capacity devolatilizer, etc.

At the same time, based on the above main extruder, the design and manufacture of a

complete set of compounding pelletizing production line equipment and compounding

extrusion forming production line equipment can be realized. It is mainly used in the fields

of engineering plastics, modified plastics, wire and cable materials, rubber, packaging,

building medical chemical industry, chemical fiber textile, household appliance and other

industries (see the application case for details).

The existing factory area of the company is 46500 m2 (of which the parent company is

38000m2, and the subsidiary (Nanjing Cenmen) is 8500m2), The core parts and system

of the extruder are designed and manufactured by the company, such as barrel, screw,

gear box, etc. The company has advanced NC machining center, NC screw grinder,

CNC machine tool and other machining equipment. Equipped with Swiss imported

three-coordinate detector and Japanese imported spectral detector and other

advanced inspection and testing equipment. There are complete quality control means

and system from processing to testing, which fully ensure the stability and reliability of

product quality.

The extruders produced by Cenmen company are exported to nearly 40 countries, such as

Germany, Russia, belarus, Japan, Korea, Israel, Ukraine, magiddon, Iran, Thailand, Indonesia,

Brazil, India, Mexico, South Africa, etc.