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ISOTHANE 1600 Series

Item NamePolyether Type / High Moisture Vapor Transmission Grade
Characteristics ISOTHANE® 1600 series products are polyether based thermoplastic polyurethane with good balanced qualities. They exhibit excellent high moisture vapor transmission. ISOTHANE® 1600 series can be processed by blown film extrusion.
Suggested Applications Apparel Applications.
Item NamePolyether Type / High Moisture Vapor Transmission Grade
Description ISOTHANE 1600 series products are polyether based thermoplastic polyurethane with good balanced qualities. They exhibit excellent high moisture vapor transmission. ISOTHANE 1600 series can be processed by blown film extrusion.
Supply and Storage ISOTHANE TPU resins are supplied in pellet form packed in 25kg moisture proof bags. All TPU resins have been dried before packing. ISOTHANE TPU resins should be stored in cool and dry environment in their original containers until be used. Storage temperature should not exceed 30°C. If only a portion of TPU resins was used from a bag, the remainder of TPU resins should be tightly closed.
Drying TPU resins are hygroscopic and pre-drying of TPU resins is always a necessary step before processing. Depend on the climate, the granule exposed to the atmosphere will absorb moisture very quickly. The moisture might bring about partial degradation of polymers and the formation of bubbles or streaks in the molded and extruded parts. In order to ensure the efficient and successful processing into quality parts, the moisture content in TPU resins is recommended less than 0.02%.

A desiccant-bed-type hopper dryer is recommended for drying ISOTHANE TPU. The dew point of the inlet air should be in the range of -30 to -40°C. About the recommended drying conditions, please view ISOTHANE individual data sheets.
Processing - Extrusion Barrel and Motor
  • High torque drive capacity at low speed
  • Vented or standard barrels acceptable
Screw
  • Compression ratios between 2:1 and 3:1
  • Minimum L/D of 30/1
Feed Throat
  • Vertical and tangential
  • Water cooling is recommended
Screen Pack
  • Streamlined breaker plates with screen packing is recommended
  • Typical 40/80/80/40 mesh screens
Die
  • Streamline with good temperature control
  • Land Length is generally 10 to 15 times the part thickness
  • Coat-hanger manifold-type dies are recommended for extruding film and sheet
  • Crosshead dies are recommended for wire, cable and hose jacketing
  • Side-fed rotating dies are recommended for blown film
About the recommended extrusion temperatures, please view ISOTHANE individual data sheets.
Processing - Injection Molding Barrel and Motor
  • High torque drive capacity at low speed
  • Vented or standard barrels acceptable
Screw
  • Compression ratios between 2:1 and 3:1
  • Metering screw with gradual transition zone
Injection Pressure
  • Typical 6,000 to 15,000 psi
  • Hold pressure 60 – 70% of forward time
Injection speed
  • Slow to moderate
  • Depends on gating, wall section and flow length
About the recommended injection molding temperatures, please view ISOTHANE individual data sheets.
Coloring Generally, ISOTHANE TPU resins are supplied in their natural color. They can be colored by blending with pigment or pigment master batch. Using master batch based on TPU is recommended. Other master batch based on polyethylene or polystyrene is suitable to a limited extent. All colorants employed in TPU resins must be pre-dried before processing.

The normal addition of pigment or pigment master batch is 0.2%-0.5% or 1-3%.
Additives Various additives can be used to enhanced the properties of ISOTHANE TPU resins, e.g. anti-blocking agents, antioxidant, UV stabilizers or release agents. Most additives supplied as master batches are available. But not all additives are compatible with ISOTHANE TPU resins. It is recommended to inquire of your suppliers or our technical service before compounding.
Recycling For ISOTHANE TPU resins, up to 20% of regrind may be recycled with virgin material depending on finished parts requirements. The regrind material has to be kept free of contamination, diced and dried before re-using. The material which has been contaminated, discolored or degraded is not suitable for recycling. TPU resins may decrease desired properties, e.g. hardness and mechanical properties, due to improperly mixing with regrind.
Regulatory or testing organizations (e.g., UL) may have specific requirements limiting the allowance amount of regrind. Certain quality requirements laid down in specifications may exclude the use of regrind material.
Healthy and Safety Information Before working with these products, it is essential that all operators are aware of the healthy and safety precautions. ISOTHANE TPU resins can be processed or machined over a wide range of temperature. There can be some smoke formation during processing. The smoke that contains some decomposition substances of TPU or additives may cause irritation to human body. Generally, the temperature does not exceed 240°C that can reduce decomposition formation. An effective extraction system, especially in the melt outlet zone, is necessary. The detail information concerning healthy and safety can be available in safety data sheets (SDS) or contact our technical service.
Disposal ISOTHANE TPU resins present no hazard to the environment or water. They can be dumped on municipal landfill or in a waste incineration plant. The official regulations on waste disposal should be observed.
ItemUnitsASTM1680A-E21680A-E31685A-E1685A-E2
Specific Gravity   D-792 1.2 1.2 1.2 1.2
Hardness Shore A D-2240 78A 78A 85A 83A
Tensile Strength MPa
psi
D-412 26
3800
27
3900
25
3600
23
3300
@ 300% elongation MPa
psi
9
1300
8
1200
10
1450
10
1450
Elongation @ break % 780 950 750 850
Tear Strength N/mm
lb/in
D-624
DIE C
110
630
110
630
150
850
110
650
Ross Flexing Test -6 °C
150000 times
D-1052 No Break No Break No Break No Break
MVT properties g/m2.day ASTM
E96 BW
12000 10000 9000 11000
MVT properties g/m2.day JIS L1099
B-1
100000 140000 15000 70000
ItemUnitsASTM1690A-E51690A-E6G1685A-E2G1685A-E3
Specific Gravity   D-792 1.2 1.2 1.2 1.2
Hardness Shore A D-2240 90A 89A 83A 83A
Tensile Strength MPa
psi
D-412 38
5500
26
3800
20
2900
24
3500
@ 300% elongation MPa
psi
15
2200
10
1500
12
1750
7
1000
Elongation @ break % 600 700 680 900
Tear Strength N/mm
lb/in
D-624
DIE C
245
1400
110
630
130
750
80
460
Ross Flexing Test -6 °C
150000 times
D-1052 No Break No Break No Break No Break
MVT properties g/m2.day ASTM
E96 BW
8000 10000 10000 11400
MVT properties g/m2.day JIS L1099
B-1
15000 25000 24000 79000

While the above information is presented in good faith and believed to be accurate, GRECO does not guarantee satisfactory results from reliance upon such information and disclaims all liability for any loss or damage arising out of its use.

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