CONTROLLING SHEAR TO PRODUCE BRILLIANT EFFECT PIGMENT MASTERBATCHES

OVERVIEW

Gone are the days of just form and function. Consumers now look for aesthetics as well as performance. And in today’s overcrowded market place the competition for attention is a fierce one. How does a packaged product stand out in a shelf when there are ten other brands offering the same set of benefits? How does a cosmetics manufacturer get millennials to buy the product? How does an automobile salesman convince his customer beyond the usual technical specifications? The challenge of ‘getting noticed’ is, perhaps, one of the most critical issues that keeps manufacturers awake in today’s world.

 

SPARKLE. GLITTER. SHINE. ATTRACT. AND SIMPLY DAZZLE.

 

At STEER, we have the answer to make you sleep better. As a leader in materials transformation, we incorporate our in-depth knowledge of polymer sciences, advanced technology and technical expertise to deliver innovative solutions that help create the differentiation that brands and manufacturers look for. Our advanced technology for processing special effect and mica-based pigments, helps manufacturers create a new degree of visual engagement. Whether it is adding lustre, sheen, glitter and sparkle, creating depth and luminescence or simply playing with multicolour effects, our technology helps you process mica-based pigments without damage to the extremely sensitive platelets, ensuring effective colouration, brilliant appearance and the right visual impact and differentiation that products and brands need to get noticed.

 

MICA-BASED EFFECT PIGMENTS

UNDERSTANDING GAPS IN TODAY’S TECHNOLOGY

 

Mineral Mica is a delicate, natural, inorganic pigment. Coated mica crystalline platelets, such as those used in effect pigments in thermoplastics (ex: for pearlescent appearance), are extremely sensitive. Any alteration or change in size of the structure will hinder effective coloration and alter the appearance of the pigments and plastics.

 

The biggest cause of attrition to the structure is exposure to shear during various stages and unfortunately most of the technology available today does not account for some or all of the following;

 

  • Efficient mixing
  • Control over shear and elimination of shear peaks
  • Efficient energy transmission
  • Stagnation and Degradation and the resulting char formation

 

Moreover, selection of the right twin-screw extruder is also critical. Key requirements include;

 

  • A deeper extruder flight depth
  • The right Screw to barrel clearance to prevent ‘Leakage’ and subsequent damage due to shearing.
  • The ability to work with low-bulk density materials.

 

 

 

 

STEER’S TECHNOLOGY

PROVEN INNOVATION MEETS ADVANCED TECHNOLOGY MEETS IN-DEPTH KNOWLEDGE OF POLYMER SCIENCES:

 

STEER’S TECHNOLOGY FOR PROCESSING EFFECT PIGMENTS WITH MINIMUM DAMAGE

 

Effective processing on a twin-screw extruder requires the precise implementation of different steps involved — Wetting, Dispersion and Task Specific mixing (Distribution and Stabilisation). At STEER, we have mastered the art of processing mica-based pigments with minimum damage, allowing us to protect product quality, while ensuring an effective and economical product.

 

The STEER Advantage

 

TRIALS AND RESULTS

THE PROOF IS IN THE PIGMENTS TRIALS CONDUCTED AT STEER’S APPLICATION DEVELOPMENT CENTER IN BENGALURU, INDIA

 

EQUIPMENT: STEER’s Do/Di=1.71 Technology platform OMEGA 40H; L/D=44 Special Design Elements by STEER Loss-in-Weight Feeders Strand pelletizer

 

MATERIALS: 70% LLDPE, 30% Pigments Iridion 305 Solar Gold Iridion 305 WM10 (PEWax dispersion) Iridion 305 Pearlets PO (70% MB in PE) Antioxidant, Additives….

 

PROCESSING: Three Screw Designs; “Standard” Hi-Shear & “Optimized” Special Elements Screw RPM fixed @ 600 for all trials 170-230C

 

TESTING: Microscopic Examination at MERCK as per MERCK Standard Procedure

 

“STANDARD” HIGH SHEAR DESIGN

 

 

Pigment Top Cut = 60microns, Top Cut in Compounded Masterbatch = 28microns

 

“OPTIMIZED” USING STEER SPECIAL ELEMENTS – SIDE FEED

 

 

Pigment Top Cut = 60microns, Top Cut in Compounded Masterbatch = 60microns, “OVERSIZE PARTICLE DETECTED INDICATING LEAST PARTICLE DAMAGE”

 

Brochure for Effect Pigment

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ABOUT STEER

 

STEER co rotating twin screw extruder is the creator of advanced materials platform technology that effectively transforms and functionalises materials in the field of plastics, pharmaceuticals, food & nutraceuticals, biomaterials and biorefining.

Certification

 

An ISO 9001 and 14000 certified company

 

 

Global Contacts

 

STEER INDIA

Tel:+91-80-23723309 / 10

+91-80-42723300

 

STEER JAPAN

Tel: +81-3-6206-4171

 

STEER AMERICA

Tel: +1-866-984-1800

 

STEER CHINA

Tel: +86-021-34718598

 

STEER EUROPE

Tel: +44 2032904949

 

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