Company Details

Shandong Novista Chemicals Co.,Ltd (Novista Group) [Shandong,China] Business Type:Manufacturer , Service , Distributor/Wholesaler Main Markets: Africa , Americas , Asia , Caribbean , East Europe , Europe , Middle East , North Europe , Oceania , Other Markets , West Europe , Worldwide Exporter:71% - 80% Certs:GB, OHSMS, FDA

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Selection of molecular weight of process aids

2022-08-20

Improves jetting or gate blush and weld line in injection molded products

Eliminates distortion in rolling bank and flow marks in calendaring process, and

Improves appearance of PVC foamed products (very high mole weight process aids.)

PA that adds lubricity are-

Low molecular weight MMA copolymers or acrylic polymers. It can be considered as acrylic waxes.

These process aids consist of PVC compatible part and PVC incompatible part.

Effect of lubricating acrylic process aids:

Improves metal release

Prevents plate out, and

Are neutral to fusion

SAN based process aids:

They are based on Poly (styrene – Acrylonitrile)

They have higher molecular weight and viscosity than acrylic process aids.

They are relatively cheaper.

They offer higher surface gloss in opaque products.

And, they do not affect VST. Copolymer of styrene – MMA, on the other hand has high molecular weight and high glass transition temp than PVC.

Some researchers recommend blend of Acrylic and SAN based processing aids for UPVC injection moulding.

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Mr. Ron Han

Email:

manager.han@novistagroup.com

Send Inquiry

Tel:86-536-8206760

Fax:86-536-8206750

Mobile Phone:+8615336365800

Email:manager.han@novistagroup.com

Address:RM1232-1233,#4 Building No.4778 Shengli East Street, Weifang, Shandong