Polyurethane Roller Grinding Jar Shore A 85-95 ATOMFAIR®

POLYURETHANE ROLLER GRINDING JAR PU 100ML-10L SHORE A 85-95 LOW NOISE

RESEARCH GRADE MATERIAL

Product Overview

ATOMFAIR® Polyurethane Roller Grinding Jar (PU Roll Mill Jar) is manufactured from high-wear-resistant polyurethane elastomer (Shore A 85–95) via one-piece integrated casting. With PU roll mill jar Shore A 85-95 100ml-10L standard volume range, this jar is specifically designed for horizontal roller jar mills and roller ball mills—not for planetary ball mills. Purpose-built for gentle dispersion no metal contamination applications, the flexible PU material provides cushioned impact that protects brittle and heat-sensitive material crystal structures from over-grinding while completely eliminating Fe, Al, Zr, and other metal impurity release. The integrated casting threaded seal low noise design features a screw-tightened compression lid with built-in sealing gasket, ensuring leak-proof operation during wet grinding. The elastic PU buffer layer dramatically reduces operating noise compared to stainless steel and ceramic jars while minimizing equipment spindle and roller wear. Standard volumes from 100 ml to 10 L are in stock; custom 15 L and 20 L large-capacity jars are available upon mold fabrication request at inquiry@atomfair.com.

Technical Specifications

PARAMETER	DETAILS
Material	Integrated Cast High-Wear-Resistant Polyurethane Elastomer (Shore A 85–95)
Complete Configuration	PU Jar Body + Threaded Compression Lid + Built-in Sealing Gasket
Compatible Equipment	Horizontal Roller Jar Mills and Roller Ball Mills Only (Not for Planetary Ball Mills)
Core Function	Soft Cushioned Dispersion—Protects Crystal Structure, Low Noise, Zero Metal Contamination
Density	1.15–1.2 g/cm³
Hardness	Shore A 85–95 (High-Elasticity Soft Material)
Operating Temperature Range	-20°C to 120°C (Long-Term High Temperature Accelerates Aging and Cracking)
Wear Characteristics	Tear-Resistant, Rolling Friction Resistant; Service Life 15–20 Years Under Normal Conditions
Chemical Resistance	Resistant to Oils, Weak Acids/Alkalis, and Common Organic Solvents; Not Resistant to Concentrated Strong Acids/Strong Alkalis/Strong Corrosive Solvents
Safety Attributes	Non-Toxic, Odorless, Smooth Non-Stick Inner Wall, Excellent Sealing, Leak-Resistant
Noise Performance	Elastic Buffer—Operating Noise Far Lower than Stainless Steel and Ceramic Jars
Custom Configurations	Custom 15 L and 20 L large-capacity PU jars are available upon mold fabrication request. Please contact us via email at inquiry@atomfair.com.

Standard Size Specifications

NOMINAL CAPACITY	OUTER DIAMETER Φ (mm)	INNER DIAMETER Φ (mm)	TOTAL HEIGHT WITH LID (mm)
100 ml	68	53	69
250 ml	98	74	90
500 ml	106	87	104
1 L	132	105	135
1.5 L	132	116	161
3 L	159	139	223
5 L	192	168	251
10 L	243	219	286

Key Features & Advantages

High-Elasticity Cushion Protects Material Crystal Structure: The flexible PU jar body delivers soft, cushioned impact that prevents lithium battery slurry, pigments, and heat-sensitive powders from being excessively crushed, preserving the original particle structure and electrochemical performance.
Dramatic Noise Reduction and Vibration Damping: The polyurethane buffer layer significantly reduces roller equipment operating noise and minimizes spindle and roller wear, creating a quieter and more comfortable laboratory working environment.
Integrated Casting with Threaded Seal—Leak-Proof Design: The one-piece seamless casting with screw-compression lid and built-in sealing gasket prevents solvent and slurry leakage during wet grinding, making it suitable for extended continuous dispersion processes.
Zero Metal Release—Pure Polymer Contamination Profile: As an entirely polymer-based material, the jar releases only trace PU debris with absolutely no Fe, Al, Zr, or other metal impurities—ideal for lithium battery, precious metal, and high-purity applications.

APPLICATION SCOPE: New energy lithium battery industry: graphite anode materials, conductive carbon black, and lithium battery slurry gentle homogenization and dispersion—prevents over-grinding that compromises electrochemical performance. Ink, coating, and pigment industry: organic color pastes, water-based coatings, and toner powder pre-mixing—ensures pigment hue integrity without whitening. Pharmaceutical, food, and biological raw materials: low-temperature mixing of heat-sensitive and fragile active powders—protects active ingredients. Fine chemicals and polymer fillers: uniform mixing of resin powders, talc, calcium carbonate, and other soft powders. Precious metal powder processing: gold and silver powder grinding with absolute elimination of iron ion contamination. Compatible exclusively with horizontal roller jar mills and roller ball mills.

RECOMMENDED GRINDING MEDIA PAIRING: Polyurethane-coated iron core balls (IC-PU) and nylon balls only. Strictly prohibited: corundum, zirconia, and cemented carbide balls—their hardness far exceeds PU and will rapidly scratch through the jar wall during high-speed rolling, generating massive PU debris contamination.

IMPORTANT NOTICE: Prohibit use with high-hardness grinding balls: corundum, zirconia, and cemented carbide balls have hardness far exceeding PU; high-speed roller rotation will rapidly scratch through the jar wall, generating massive PU debris contamination. Only polyurethane-coated iron core balls and nylon balls are recommended. High-temperature operation prohibited: prolonged operation above 120°C will cause softening, cracking, swelling, and jar failure; high-temperature dry grinding is not suitable. Strongly corrosive systems prohibited for long-term use: concentrated hydrochloric acid, concentrated sodium hydroxide, and hydrofluoric acid will corrode the PU surface, causing jar damage. Exclusively for roller jar mills—strictly prohibited in planetary ball mills: planetary high-speed centrifugal impact will directly tear the jar body. Replace damaged jars immediately: discard jars showing cracking, peeling, or inner wall scratching—debris contamination risk increases dramatically. Not suitable for ultra-hard material ultrafine grinding: designed only for mixing and pre-dispersion without strong crushing capability; do not use for high-hardness ores or diamond. For custom volumes and specifications, contact us at inquiry@atomfair.com.

TAILORED SOLUTIONS FOR RESEARCH

Contact our engineering team for technical support or official quotations.

EMAIL: inquiry@atomfair.com

Manufacturer: Atomfair LLC

Brand: ATOMFAIR®

The polyurethane roller grinding jar is designed for gentle dispersion in roller jar mills, with a Shore A hardness of 85-95 and operating temperature range of -20°C to 120°C. It is chemically resistant to oils, weak acids/alkalis, and common organic solvents but not to concentrated strong acids, strong alkalis, or strong corrosive solvents.

Grinding Media Compatibility: Use only polyurethane-coated iron core balls or nylon balls as grinding media to avoid scratching the jar wall.
Operating Temperature Limit: Prolonged operation above 120°C causes softening, cracking, swelling, and jar failure, so avoid high-temperature dry grinding.
Chemical Resistance Constraint: Avoid concentrated strong acids, strong alkalis, and hydrofluoric acid as they corrode the polyurethane surface.
Equipment Compatibility: Use exclusively with horizontal roller jar mills or roller ball mills; do not use in planetary ball mills due to high-speed centrifugal impact.
Damage Inspection Requirement: Discard jars showing cracking, peeling, or inner wall scratching to prevent debris contamination.

FAQ

How does the polyurethane roller grinding jar prevent metal contamination and protect crystal structure during dispersion?

The jar is manufactured from high-wear-resistant polyurethane elastomer (Shore A 85–95) via one-piece integrated casting, providing a soft cushioned impact that prevents over-grinding of brittle and heat-sensitive materials. It releases only trace PU debris with absolutely no Fe, Al, Zr, or other metal impurities, making it ideal for lithium battery slurry, precious metal powders, and high-purity applications where preserving crystal structure and electrochemical performance is critical.

What grinding media and mill types are compatible with the Atomfair PU roller grinding jar?

This jar is designed exclusively for horizontal roller jar mills and roller ball mills; it is strictly prohibited in planetary ball mills due to high-speed centrifugal impact that can tear the jar body. Recommended grinding media are polyurethane-coated iron core balls (IC-PU) and nylon balls. Corundum, zirconia, and cemented carbide balls are prohibited because their hardness far exceeds PU and will rapidly scratch through the jar wall during rolling, generating massive PU debris contamination.

What are the critical operating temperature and chemical resistance limitations for the PU grinding jar?

The operating temperature range is -20°C to 120°C; prolonged operation above 120°C causes softening, cracking, swelling, and jar failure, so high-temperature dry grinding is not suitable. Chemically, the jar resists oils, weak acids/alkalis, and common organic solvents, but it is not resistant to concentrated strong acids (e.g., concentrated HCl), strong alkalis (e.g., concentrated NaOH), or strong corrosive solvents (e.g., hydrofluoric acid), which will corrode the PU surface and damage the jar.

Assessment

This polyurethane roller grinding jar (100 ml to 10 L) is engineered for horizontal roller mills, delivering zero metal contamination and low-noise cushioned dispersion, but requires exclusive use of soft grinding media and cannot tolerate high temperatures or strong corrosive chemicals.

Positive

Zero metal contamination: The one-piece polyurethane elastomer construction eliminates Fe, Al, Zr, and other metal impurities, making it ideal for lithium battery, precious metal, and high-purity applications.
Low noise cushioned dispersion: The elastic PU buffer layer reduces operating noise far below stainless steel and ceramic jars while protecting brittle material crystal structures from over-grinding.

Trade-offs

Strict grinding media compatibility: Only polyurethane-coated iron core balls and nylon balls are recommended; high-hardness balls like corundum, zirconia, or cemented carbide will rapidly scratch through the jar wall, causing massive PU debris contamination.
Limited temperature and chemical resistance: Long-term operation above 120°C accelerates aging and cracking, and the material is not resistant to concentrated strong acids, strong alkalis, or strong corrosive solvents.

Quality Standards & Performance Verification

Every advanced material, component, equipment, and instrument in our catalog is backed by rigorous testing. We maintain strict internal quality management frameworks and align with CE conformity metrics to deliver transparent, reproducible performance data via our public open-science repository.

To request raw batch performance data, submit formal vendor registration paperwork, or execute a fast-turnaround R&D manufacturing loop, contact us at inquiry@atomfair.com.

Shipping & Returns

Item is dispatched under the Atomfair Shipping & Delivery Framework (Free worldwide shipping on orders over $59 USD excl. heavy equipment). Return is governed by the Atomfair Return & Refund Policy (7-day technical return window).