Why do PU manufacturers need a 3K static mixer?

A typical polyurethane sealant production process starts with a PU prepolymer base material.

To create differentiated products, manufacturers often add additional components inline, such as:

✅ Color paste / pigment paste
✅ Catalysts / accelerators
✅ Adhesion promoters
✅ UV stabilizers and specialty additive

In many factories, the packing process still relies heavily on manual work:
adopt manual opening cartons,sorting cartridges,install nozzles,seal cartons and palletizing. which often requires five workers.
But with an automated packing system, the same process can usually be handled by just two operators.
So what actually changes inside the production line?
In this article, we share:
➡️A real project case from a sealant factory;
➡️How semi-automatic filling can work with automatic packing;

In recent years, PU sausage packaging has become increasingly common across automotive, construction, and ?????????? ????????????.
Many discussions focus on filling equipment, but less attention is given to what happens after filling--especially case packing and transport protection.
This article gives a unique analysis and conclusion,It may be useful for manufacturers evaluating end-of-line automation or upgrading existing packaging systems.

Case Highlight | High-Power Static Mixer for MS Sealant Production

YiHeng Silicone, founded in 2009, is one of China’s leading high-tech silicone manufacturers, with an annual capacity of 120,000 tons and two major production bases in Guangdong and Hubei. For its new intelligent production line at the Hubei facility, YiHeng once again selected Great Machinery as its equipment partner.

Great Machinery has been recognized internationally, two international chemical group inquiries case study share

With over 18 years of industry experience, Great Machinery focuses on backend sealant manufacturing equipment, providing integrated solutions covering pressing, static mixing, filling, cartoning, and automated palletizing—helping global sealant producers build stable and efficient production lines.

In the sealant industry, precision color matching is no longer optional—it’s essential.

Whether for construction façades, consumer appliances, or automotive components, colored sealants play a vital role in delivering visual consistency and brand quality. To meet these rising demands, GREAT Machinery proudly delivered two sets of custom color mixing systems (Model GR-TSJ-X8-600) to Bluestar Silicones Xinghuo, a subsidiary of Sinochem Group and part of the global ELKEM family.

This article features a fully customized production line built by GR Machinery, combining the upgraded JTH-X4 Static Mixing System with a servo-driven automatic sausage packing machine — designed for high-mix, high-efficiency silicone sealant production.

Why “Sausage Packing” Is Winning the Sealant Market
Sausage-style packaging, named for its long cylindrical shape, uses aluminum foil film to wrap adhesive in sealed, tubular forms. It’s compact, cost-effective, and eco-friendly—qualities that make it an increasingly popular alternative to traditional paper cartridges

Air exposure, inaccurate filling, or unstable cartridge/sausage quality can directly affect:curing performance,bonding reliability,and production efficiency for end users.
That’s why PU adhesive manufacturers are upgrading their automated filling & packaging equipment.
For PU adhesive suppliers, packaging is not just a container; it’s part of product performance.ensures zero-risk bonding.