pss-3000 sheet - optical filters usa llc...pss-3000 sheet is a thermoset, cell cast transparent...
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PSS-3000 Sheet
Technical Design Guide
Revision Written By Date of Release
01 Chuck Clontz March 23, 2012
CR-39 is a registered trademark of PPG Industries Ohio, Inc.
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Table of Contents
Product Definition ............................................................................................................................. 3
General Information .......................................................................................................................... 4
Material......................................................................................................................................... 4
Surface Finishes ............................................................................................................................. 4
Colors ............................................................................................................................................ 4
Available Sizes and Thickness ......................................................................................................... 4
Cosmetic Specifications ................................................................................................................. 5
Properties ......................................................................................................................................... 8
Optical Performance ...................................................................................................................... 8
Abrasion Properties ..................................................................................................................... 11
Physical Properties ...................................................................................................................... 12
Packaging and Handling ................................................................................................................... 13
Cleaning Specifications .................................................................................................................... 13
Cutting Instructions ......................................................................................................................... 14
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Product Definition
PSS-3000 optical sheet is produced using a technologically advanced thermoset resin and offers
excellent optical properties, rugged durability and lightweight performance. PSS-3000 sheet,
produced from CR-39®monomer, was developed as a substitute for glass. PSS-3000 sheet also offers
outstanding chemical resistance, mechanical properties and thermal stability. PSS-3000 sheet
combines the optical quality and chemical resistance of glass with the lightweight performance of
plastics.
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General Information
Material
PSS-3000 sheet is a thermoset, cell cast transparent optical polymer which has a unique combination
of properties and advantages over other plastics for a multitude of optical displays and bar code
scanner exit window applications. PSS-3000 sheet is based on allyl diglycol carbonate (ADC)
chemistry.
Surface Finishes
Four Surface Finishes Available, One or Two Sides
• Smooth / no Matte finish • Light Glare Reduction / 135 Gloss Units
• Medium Glare Reduction / 110 Gloss Units • Heavy Glare Reduction / 85 Gloss Units
Colors
Clear (Colorless) Brown
Neutral Gray Red
Blue Laser Red (650 nm)
Aqua (Blue-Green) Laser Red (670 nm)
Amber Green
Yellow IR Transmitting Only
Custom Colors available on request
Available Sizes and Thickness
Custom Sizes up to 960 mm x 480 mm (37.8” x 18.9”)
Dimensional Tolerances: +/- 10 mm. of nominal dimension
Standard Thicknesses:
mm Tolerance
(mm)
0.5 +/- 0.10
0.7 +/- 0.10
1.0 +/- 0.10
1.5 +/- 0.15
2.0 +/- 0.20
3.0 +/- 0.30
4.0 +/- 0.40
5.0 +/- 0.50
6.0 +/- 0.60
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Cosmetic Specifications
The following visual inspection for PSS-3000 optical sheet products is performed. The size of defects
refers to the Scratch and Dig Paddle specifications (MIL-0-13830A standard).
PSS-3000 sheet samples are observed facing a strip light in a room with an ambient light.
• Ambient light: 250
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Inspection Criteria – Level I
Dimension > 360x360 mm
Defect Size criteria Number criteria
Circular defect Dig, dots, inclusion,
bubble etc.
Size < 0.10mm No limited but not agglomerate
0.10mm ≤ Size < 0.40mm
Max = 3 defects
Minimum distance between defect > 20 mm
0.40mm ≤Size< 0.70mm Max = 1 defect
Minimum distance between defect > 100 mm
Size ≥ 0.70mm none
Linear defect
Scratch, inclusion, fiber
inclusion etc
Size < 0.040mm No limit but not agglomerate
0.040mm≤Size
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Inspection Criteria – Level II
PSS-3000
Dimension > 455 x 480 mm
(or equivalent surface area)
Defect Size criteria Number criteria
Circular defect Dig, dots, inclusion,
bubbles, stains,
delamination, etc.
Size < 0.20mm No limit but not agglomerate
0.20mm ≤ Size < 0.50mm Max = 1 defect
Size< 0.70mm None
Minimum distance between defects > 20 mm
Linear defect
Scratch, inclusion, fiber
inclusion etc
Size < 0.030mm No limit
0.030mm≤Size 20 mm
Spread defect Dirty, Ink, Wave,
combination
Not acceptable None
Edge Chip For laser cut or scored
edges
W ≤ 0.25 mm No requirement
0.25 < W ≤ 0.5 mm No requirement
W > 0.5 mm No requirement
Total defects acceptable No Maximum
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Properties
Optical Performance
Precision optics, low haze and high light transmission are key performance attribute of PSS-3000
sheet.
UNITS STANDARD
PSS-3000 sheet
SMOOTH 135 GLOSS
UNITS
85 GLOSS
UNITS
Luminous Transmittance % 92.0 92.0 91.9
Haze % 0.03 0.87 2.00
Yellowness Index ASTM E313 0.77 0.77 0.80
Refractive Index, ηe 1.50 1.50 1.50
Abbe Value 57 57 57
* Gloss Measured at a 60 ° angle
Typical Light Transmission Spectra of PSS-3000 sheet - Clear (Colorless) grades:
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Typical Light Transmission of PSS-3000 Sheet Colors:
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Abrasion Properties
Uncoated PSS-3000 is inherently scratch resistant. The increase in haze on 3.0 mm thick uncoated
sheets after 100 cycles using a CS-10 wheel with a 500 gram weight at 72 rpm per ASTM D1044 and
ASTM D1003-07 is only 9.8%.
TEST
CONDITIONS UNITS STANDARDS PSS-3000
MECHANICAL Tests conducted on 1.0 mm thick sheet
Taber
Abrasion
500 g, 100 Cycles
(3mm thick) % ASTM D1044 9.66
Steel Wool
Abrasion 200 Cycles, #0000 % 2
Photo: PSS-3000 after 100 cycles Taber Abrasion
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Physical Properties
TEST CONDITIONS UNITS STANDARDS PSS-3000
MECHANICAL Tests conducted on 1.0 mm thick sheet
Tensile Stress at Break 50% RH / 23°C MPa ASTM D638-08 51
Tensile Elongation at Break 50% RH / 23°C % ASTM D638-08 14
Tensile Modulus 50% RH / 23°C MPa ASTM D638-08 1,582
Tensile Yield Stress 50% RH / 23°C MPa ASTM D638-08 44
Compressive Stress 50% RH / 23°C MPa ASTM D695-02a 58
Compressive Modulus 50% RH / 23°C MPa ASTM D695-02a 1,088
Compressive Yield 50% RH / 23°C MPa ASTM D695-02a 42
Maximum Load 50% RH / 23°C N ASTM D790-07 30
Flexural Stress 50% RH / 23°C MPa ASTM D790-07 91
Flexural Modulus 50% RH / 23°C MPa ASTM D790-07 2,724
Martens Hardness (HM) N/mm2
ISO 14577 103
Rockwell Hardness 50% RH / 23° C ASTM D785 88
Pencil Hardness 7.5 N Force ISO 15184 H
Taber Abrasion 500 g, 100 Cycles
(3mm thick) % ASTM D1044 9.66
Steel Wool Abrasion 200 Cycles, #0000 % 2
Izod Impact – Notched 25°C Ft lb/inch ASTM D256 0.2-0.4
Izod Impact – Unnotched 25°C Ft lb/inch ASTM D256 2-3
THERMAL Tests conducted on 3.0 mm thick sheet
Specific Heat 25°C J / g / °C ASTM E1269 1.30
Thermal Expansion
Coefficient μm / (m °C) ASTM E831 100
Heat Distortion
Temperature 264 psi °C ASTM D648 55
Softening Temperature °C ASTM E1545 >200
FLAMMABILITY Tests conducted on 1.0 mm thick sheet
UL 94 Flammability Class 50% RH / 23°C ASTM D3801 /
D635-06 HB
Flash Ignition Temperature °C ASTM D1929 376
Self Ignition Temperature °C ASTM D1929 382
ELECTRICAL Tests conducted on 1.0 mm thick sheet
Surface Resistivity 50% RH / 23°C, 500 V Ohms ASTM D257-99 28 x 1015
Volume Resistivity 50% RH / 23°C, 500 V Ohms ASTM D257-99 15 x 1015
Dielectric Constant At 100 Hz ASTM D150 4.4
BASIC Tests conducted on 1.0 mm thick sheet
Specific Gravity g / cm3
1.31
Water Absorption 7 days / 25°C % 0.7
Oxygen Permeability 0% RH / 23°C cm3
/ (100 in2
*
day) ASTM D3801 0.1
Water Vapor Transmission
Rate 100% RH / 38°C g / (100 in
2
* day) ASTM F1249 0.27
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Packaging and Handling
Packaging description
All PSS-3000 sheets are covered with a clear low tack protective film on both sides then placed in
double walled corrugated cardboard boxes.
Handling procedures
Although PSS-3000 sheets are durable and abrasion resistant, precautions should be taken to insure
materials are carefully handled by trained persons. Inspection should only be carried out in a clean
environment. Place sheets not protected by plastic film on a clean lint free cloth. Removing the
protective plastic film may generate static charge. Deionized dry clean compressed air will help to
reduce it. Additionally:
1. Use clean lint free wipes or dry clean compressed air to remove dust from the surface.
2. Handle parts by the edges only if and when the protective foil is removed, if necessary wear clean
protective gloves.
3. Remove half the protective film on both sides whilst holding the filter on the protective half,
complete the evaluation of this area and replace the protective foil. Repeat this on the opposite side
to inspect the total area with the minimal risk of damage.
4. Do not slide or drag parts across any surface.
5. Never place the filter down without placing it back into its packaging or clean lint free cloth
protection.
Cleaning Specifications
PSS 3000 sheets have great chemical resistance and permit cleaning with several detergents and
solvents like alcohol, thinner, acetone.
Adhesive residue, dust and dirt may be removed by glass cleaner or above mentioned solvents and
soft clean cloth.
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Cutting Instructions
I. Using a Laser Cutting Tool
All PSS-3000 sheets can be cut to any shape or size using a computer controlled laser with general
tolerance of ± 0.1 mm. See table below for laser settings using a Universal® Laser Systems ILS
12.150D with two 50W laser tubes and air assist.
Laser Settings
Sheet thickness
(in)
Cutting Speed (%)
0.030 27
0.040 25
0.060 18
0.080 12
0.118 7.5
0.195 4.8
0.240 4
*All vector cutting performed at 100% power.
II. Using a Computer Numerically Controlled (CNC) Cutting Tool
Customers that are used to processing plastic material that is softer than PSS-3000 sheet may have
to increase the RPM of their milling machine and adjust milling linear speed depending on the
thickness of the sheet. Otherwise, the risk of breaking or chipping the PSS-3000 sheet increases.
Specific details are below:
1. CUTTER SPINNING SPEED The cutter spinning speed can be set as high as possible. In general:
• 5 mm diameter cutter: 25,000 rpm • 1 mm diameter cutter: 40,000 rpm
2. CUTTER ROTATION DIRECTION For best results, the cutter tool should move in the same direction as rotation of tool.
3. CUTTER LINEAR DIRECTIONAL SPEED The X, Y and Z linear speeds will depend on how much material is going to be removed
(thickness and size reduction).
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4. CUTTING SQUARE ANGLES 90° tool movement is suggested for cutting square angles and to continue the cutter past
the end of the sheet as shown to the right.
5. COOLING REQUIREMENTS Cooling by liquid is not needed. Air flow to cool the cutter and remove the cut material is
recommended.
6. EXAMPLE OF PARAMETERS FOR A 1.0 MM THICK SHEET USING CNC MACHINE
Cutting Diameter
5.5 mm 1.0 mm
FZ – linear speed on Z axis
(cutter in-out)
1250 mm/min 450 mm/min
FA – linear speed on X and Y axis
2500 mm/min 675 mm/min
S – cutter spinning speed
28000 rpm 38500 rpm
III. Using a Knife-Blade to Score PSS-3000 Sheet A Tantung or Widia blade can be used to score PSS-3000 sheet. Note that thinner sheets
(