GY-MI-01 Polymer Melt Index Modifier

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GY-MI-01 is supplied as a free-flowing crystalline white powder with excellent dispersibility,

ensuring uniform incorporation into polymer matrices without process disruption.

Properties

GRADE GY-MI-01
Physical State Crystalline powder
Color White
Proportion 0.5±0.1
Flash point °C >280
Dispersibility Excellent

High Thermal Stability

Flash point above 280 °C ensures safe operation at typical polymer processing temperatures.

Excellent Dispersibility

Uniform distribution throughout the melt minimizes property variation across the finished part.

 

Key Features 

• Efficiently increases polymer Melt Flow Index (MFI)
• Improves plastic processing efficiency and productivity
• Excellent dispersion in polymer matrices
• High thermal stability during processing
• Stabilizes melt flow behavior in recycled plastics
• Compatible with a wide range of polymers
• Enhances extrusion and injection molding performance

GY-MI-01 is engineered for broad polymer compatibility, making it a versatile additive

across virtually every major resin platform in the plastics and elastomer industries.

Polyolefins

PP, PE, HDPE, LDPE, EVA, POE — the workhorses of packaging, film, pipe, and automotive applications.

General-Purpose Plastics

PVC and PS — widely used in construction, consumer goods, and packaging sectors.

Engineering Plastics

ABS, PC, PET, PBT, PA6, PA66 — high-performance resins in automotive, electronics, and industrial components.

Elastomers

TPE, TPU, TPR, TPO — flexible systems requiring precise rheological control for consistent finished properties.

 

Application Photos

Below are representative application examples.

 

Application Processes

GY-MI-01 integrates seamlessly into the most common polymer conversion processes,

providing MI correction at the point of manufacture with no additional equipment required.

Extrusion

Suitable for single- and twin-screw extrusion of profiles, pipes, films, sheets, and compounding

lines where consistent melt viscosity is critical.

Injection Molding

Improves fill characteristics and cycle times in injection molding of structural and precision

components across automotive, electronics, and consumer goods.

Blow Molding

Optimizes parison formation and wall thickness uniformity in blow molding of bottles,

containers, and hollow parts.

Pelletizing

Applied during pelletizing and compounding to normalize MI in masterbatch,

color concentrate, and recycled resin production.

 

Recommended Usage & Dosage

Recommended Addition Rate

The GYC Technical Department recommends an addition rate of 0.5% to 3.0% by weight.

Customers are advised to optimize the dosage based on specific material characteristics,

base resin MI, and target MI adjustment requirements.

For complex formulations or highly recycled-content compounds, pilot-scale trials are

recommended to confirm the optimal loading before full production runs.

 

Packaging & Storage Guidelines

20KGPer bag 

280°CFlash Point

 

Melt Flow Index (MFI) is a key parameter used to evaluate the flowability of thermoplastic polymers.

A higher MFI generally indicates better flow behavior during processing, which can improve production

efficiency and molding quality.

However, recycled materials, temperature variation, and filler addition may cause unstable melt index,

resulting in poor processing performance. Melt index modifiers such as GY-MI-01 provide a reliable

solution to control polymer flow characteristics.

 

About GYC Group

GO YEN CHEMICAL INDUSTRIAL CO., LTD. (GYC GROUP) is a leading Asian manufacturer of specialty chemicals,

dedicated to delivering innovative products and technical solutions to customers worldwide.

The GY-MI Series represents GYC's commitment to solving real-world processing challenges

in the plastics and elastomer industries.

 

40+ years specialty chemical manufacturing
Stable quality and global supply
Technical support for polymer modification
Custom additive solutions
Contact us today for technical consultation or sample testing.

Global Reach

Supplying specialty chemical solutions to customers across international markets in plastics, elastomers, and polymer processing.

Technical Expertise

Dedicated R&D and technical support teams assist customers in formulation development, dosage optimization, and process troubleshooting.

Market-Driven Innovation

GYC continuously develops additive solutions — including the full GY-MI Series — to address evolving needs in sustainable materials and circular economy applications.