Polished Belt Information
Sandvik Process Systems
May 2011
Sandvik Polished Belt
 Sandvik Polished Belt
 Different surface grade for different application needs
 Inclusion level, surface roughness, thickness tolerance etc
 Main Usage
 Used in film casting machine for high-tech plastic films
 Best for thin, constant, high optical performance film
 Major end-user applications: FPC, LCD display, packaging etc
 Major materials are PI, TAC, PC, PP and PVA etc
 Casting techniques are more used to produce thin films to
meet market’s high spec demands
Sandvik Process Systems
Where is Polished Belt used?
Film Type
Enduser Market
Chemical
Ceramic sheet
Fuel Cell, Capacitor
Ceramic
Membrane
Medical
High-tech Membrane
Packaging Film
Consumer
PP, PVC
LCD thin films
LCD display
TAC, PVA(PVOH), PC
Flexible printed
circuit board films
Digital camera, mobile
phone, laptop PC etc
PI
High-tech thin film
lamination (press)
Electronics, Automotive,
Aerospace etc
Various sheet materials
Sandvik Process Systems
Examples - LCD and FPC
Antireflection Film
Polarization Film
Retardation Film
Substrate
Color Filter
Substrate
Polarization Film
Diffusing Film
Prism Sheet
Flexible Printed
Circuit (PI)
Sandvik Process Systems
(PET)
(PVA with TAC)
(PC, COP, TAC)
(PES, PET, PC, PAR)
(PET)
(PES, PET, PC, PAR)
(PVA with TAC)
Sandvik Polished Belt
1. Various Surface Grade Available
 From buff to super mirror polish
 Various size available
2. On-site Installation Service
 Need to polish after welding
 Can save installation time and cost for big belt
3. Flexible Service Support
 Quick on-site surface repair available by Sandvik local service
 Re-polishing service available at Sandvik factory
Sandvik Process Systems
Feature 1: Different Surface
 Many surfaces available to meet wide application requirements
 Surface sample available from factory
 Unique surface patterns (satin etc) can be also consulted.
Grade
Ra
Pin Holes
Thickness
Remarks
Variation
Fine ground
<= 0.2 um
Not specified
<= 80um
Buffing
<= 0.1 um
Not specified
<= 80um
PF-0
<= 0.02 um
size > 500um : None
<= 50um
PF-1
<= 0.02 um
100um <= size <= 500um
<= 50um
with 20 pc/m2
PF-2
<= 0.01 um
50um <= size <= 100 um
required
<= 50um
with 5 pc/m2
PF-3
<= 0.01 um
40um <= size <= 70 um
with 5 pc/m2
Sandvik Process Systems
ESR material
ESR material
required
<= 40um
ESR material
required
Feature 2: Installation Service
 Belt to be delivered with endless or open length
 For endless
 Cross-welded line is polished with seamless condition in
factory
 For open length
 SPS provides on-site installation service
 Cross-welding and polishing of welding line
 Field polishing equipment available (in Japan)
Sandvik Process Systems
Feature 3: Repair Service
 Complete “re-polishing” service available
 At Japan factory
 Good for less damaged belt
 On-site “spot repair” service available
 At customer’s site
 Good for one spot repair
Sandvik Process Systems
Polished Belt – Production Process
 Steel Belt from Sweden
 AOD Material (Argon-Oxygen-Decarburization)
and ESR Material (Electroslag-Remelting)
 Use ESR belt (less inclusion) for high grade polished belt.
 Mechanical property is same.
 Polish in Japan factory
 5 grades, PF-0 to PF-4
1）Belt Material
 Inspection
 Inspection by Sandvik
 Inspection by Customer
3）Inspection
 Delivery and Installation to Customers
 Factory or Field Welding
4）Delivery and
Installation
Sandvik Process Systems
2）Polishing
Application example – thin film
casting production line
Polymerization
Unit
Casting
Unit
Vertical
Dryer
Cooling
Zone
Tenter
(Horizontal)
Tenter
(Vertical)
Control
Unit
Air Handling
System
Steel belt casting unit
Dryer oven
Die
Belt conveyer
with polished belt
Sandvik Process Systems
Winder
Sales Catalogs
 Sandvik Polished Belt Catalog (S-PS024-B-ENG)
 Sandvik Steel Belt Selection Guide (PS-SB-101 ENG)
 Sandvik Steel Belts Specifications (PS-SB-5507 ENG)
 Taylor-made Customer Specification (for each customer)
 Steel Belt Catalog (1000SA, 1200SA etc)
New!
Sandvik Process Systems
Customer Specification
Sandvik Process Systems
Information Required
 Application




Film Type (PI, TAC, PC, Membrane, Ceramic etc)
Typical Film Thickness (xx um)
Enduser Application (FPC, LCD, Membrane, Fuel Cell etc)
Production Machine (Maker, single belt casting? or double belt system? etc)
 Steel Belt






Belt Grade (Sandvik 1000SA or 1200SA or others?)
Dimension (Length, Width, Thickness)
Open Length or Endless
Required Surface Roughness (Ra value)
Required Surface Defect Level (Buff, PF-xx etc)
Necessity for Field Installation
 Others
 Required Delivery Schedule
 Inspection Before Shipment at Sandvik Factory
 Term of Shipment
Sandvik Process Systems