PRS Cooling Rolls: Custom Cooling Equipment for Biaxial Film Lines

💡 For any factory running biaxially oriented plastic film production lines, stable cooling after transverse stretching (TDO) is non-negotiable. Poor cooling uniformity leads to warped film, inconsistent thickness and unstable mechanical properties — all costly production defects.

Our PRS cooling roll acts as the core heat exchange component on the post-stretching traction segment. We’ve engineered three distinct surface treatment versions to match different working zones on stretching lines, compatible with BOPP, BOPET, BOPA and adhesive tape manufacturing workflows.

1. Three PRS Cooling Roll Models for Different Process Segments

All three roller series support a maximum film width of 10.6 meters, with adjustable rated line speeds to match diverse production demands.

1.1 Hard Chrome Plated PRS Cooling Roll

The thick hard chrome electroplated surface delivers exceptional abrasion resistance and outstanding heat transfer efficiency. This model is mounted immediately downstream of TDO stretching equipment, with a maximum allowable line speed of 600 m/min.

1.2 Anti-Stick Coated PRS Cooling Roll

Equipped with exclusive non-adhesive functional surface coating, this roller prevents hot, soft molten film from adhering to roll surfaces, fully eradicating surface sticking flaws on finished film products. It is installed on the intermediate traction area after primary cooling, supporting speeds up to 650 m/min.

1.3 Ozone Anti-Corrosion PRS Cooling Roll

Constructed with fully anti-corrosion stainless steel base material, this roller withstands oxidative damage from ozone produced during corona surface modification. Positioned right after corona treatment units, it safely runs at a maximum speed of 650 m/min.

2. Hidden Hazard: Ozone Corrosion on Conventional Cooling Rolls

⚡ Corona treatment relies on high-voltage electric discharge, which generates large volumes of strongly oxidative ozone gas.

For standard chrome-plated cooling rollers without anti-ozone protection:

Long-term ozone penetration damages surface coating layers
Coating blisters, bubbles and eventually peels off completely
Minor touch-up recoating cannot repair permanent base material damage
Once failure occurs, full roller replacement is mandatory, triggering unplanned line shutdowns and heavy production losses

Our ozone-resistant PRS cooling roll eliminates this recurring factory headache entirely.

3. Standard Complete Technical Parameters of PRS Cooling Rolls

Every PRS cooling roll adopts a double-shell circulating water cooling design, with unified inlet & outlet water ports on one roll end:

Raw Material: Inner & outer barrels use Q345B structural steel; outer barrel assembled via precision interference fit
Internal Flow Channels: Customizable independent water pipelines based on customer line layout
End Assembly Parts: Forged high-strength low-carbon alloy steel flanges & solid shafts on both driving and operating sides, fixed with interference fit + full penetration welding
Precision Tolerance: Out-of-roundness ≤0.1 mm, cylindricity ≤0.1 mm
Dynamic Balance Standard: Grade G2.5, stable operation up to 630 m/min line speed
Optional Surface Treatment: Hard chrome plating, anti-stick functional coating, ozone-resistant anti-corrosion coating

4. Global Manufacturing Application Cases

We have delivered customized PRS cooling roll integrated solutions for over 100 complete BOPP & BOPET production lines, covering more than 10 countries and regions globally. Long-term cooperative partnerships are established with multiple top-tier film manufacturing conglomerates.

After replacing outdated cooling equipment with our PRS series rollers, all client facilities recorded a 5% to 10% boost in overall production efficiency, alongside reduced film scrap rates.

5. Custom Matching & Full-Cycle Technical Services

Whether you’re constructing brand-new biaxial film production lines or upgrading worn-out old rollers, our professional engineering team provides end-to-end support:

✅ One-to-one technical parameter matching

✅ Personalized roller structural design

✅ Full lifecycle after-sales technical guidance

Get In Touch With Our Film Equipment Specialist

Jenny Liu

WhatsApp / Mobile: +86 17743789775

Email: sale05@huataogroup.com

Official Website: www.huataorolls.com

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