Ultra Heat Resistance
Highly elastic grades with ultra heat resistance up to 320℃, requiring no post-cure and offering a low compression set.
Key Benefits
- No post-cure required
- Heat resistance below 320℃
- Colorable
- Suitable for molding and extrusion
- Low compression set
Applications
- Keypad
- Gasket
- Packing
- Roller
- High-temperature parts
Typical Properties by Grade (per Catalog)5 grades
| Grade | Application | Product | Appearance | Specific Gravity | Williams Plasticity | Organic Peroxide | Linear Shrinkage (%) | Curing Condition | Mechanical PropertiesKS M6518 | Compression Set (%)180℃/22hr | Heat Resistance250℃/72hr | Oil ResistanceIRM903 Oil, 150℃/72hr | Volume Resistivity (Ω·cm) | Reference | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Trade Name | PHR | Press Cure℃/min | Post Cure℃/hr | HardnessShore A | Tensile Strengthkgf/cm² | Elongation at Break% | Tear Strengthkgf/cm · Type B | Hardness Δ | Tensile Δ% | Elongation Δ% | Hardness Δ | Tensile Δ% | Elongation Δ% | Volume Δ% | ||||||||||
| 초내열용 Ultra Heat Resistance (<320℃) | Gasket, O-Ring, Steam rice cooker, Steam iron, Jar pot, Autoclave, Gasket, O-ring, Valve | TS 741U | Milky-Ivory 아이보리 | 1.12 | 150 | SC-8B | 1.0 | 4.0 | 170/10 | 200/4 | 40 | 90 | 500 | 24 | 18 | 0 | -15 | -20 | -32 | -50 | -40 | +48- | – | – |
| 초내열용 Ultra Heat Resistance (<320℃) | Gasket, O-Ring, Steam rice cooker, Steam iron, Jar pot, Autoclave, Gasket, O-ring, Valve | TS 751U | Milky-Ivory 아이보리 | 1.15 | 220 | SC-8B | 1.0 | 3.8 | 170/10 | 200/4 | 50 | 99 | 400 | 25 | 16 | +2 | -10 | -20 | -30 | -48 | -38 | +45 | – | – |
| 초내열용 Ultra Heat Resistance (<320℃) | Gasket, O-Ring, Steam rice cooker, Steam iron, Jar pot, Autoclave, Gasket, O-ring, Valve | TS 761U | Milky-Ivory 아이보리 | 1.18 | 250 | SC-8B | 1.0 | 3.7 | 170/10 | 200/4 | 60 | 96 | 300 | 27 | 16 | +2 | -15 | -20 | -31 | -49 | -35 | +45 | – | – |
| 초내열용 Ultra Heat Resistance (<320℃) | Gasket, O-Ring, Steam rice cooker, Steam iron, Jar pot, Autoclave, Gasket, O-ring, Valve | TS 771U | Milky-Ivory 아이보리 | 1.22 | 280 | SC-8B | 1.0 | 3.5 | 170/10 | 200/4 | 70 | 95 | 250 | 27 | 17 | +4 | -10 | -20 | -30 | -50 | -30 | +43 | – | – |
| 초내열용 Ultra Heat Resistance (<320℃) | Gasket, O-Ring, Steam rice cooker, Steam iron, Jar pot, Autoclave, Gasket, O-ring, Valve | TS 781U | Milky-Ivory 아이보리 | 1.24 | 330 | SC-8B | 1.0 | 3.3 | 170/10 | 200/4 | 80 | 94 | 230 | 26 | 15 | +1 | -10 | -20 | -30 | -50 | -30 | +41 | – | – |
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Same layout as the product catalog (Apr 2026). Values are typical measurements based on KS M6518, not specifications, and may vary with curing agent and cure conditions.
Grades per TDS5 grades
| Grade | Appearance | Specific gravity | PlasticityWilliams, mm/100 | HardnessShore A | Tensile strengthkgf/cm² | Elongation% | Tear strengthkgf/cm | Linear shrinkage% | Compression set%, 175℃×22h |
|---|---|---|---|---|---|---|---|---|---|
| TS 7410U | Black · White · Beige | 1.12 | 150 | 40 | 92 | 500 | 24 | 4.0 | 18 |
| TS 7510 U | Black · White · Beige | 1.15 | 220 | 50 | 101 | 400 | 25 | 3.8 | 16 |
| TS 7610U | Black · White · Beige | 1.18 | 250 | 60 | 98 | 300 | 28 | 3.7 | 16 |
| TS 7710 U | Black · White · Beige | 1.22 | 280 | 70 | 97 | 250 | 28 | 3.5 | 17 |
| TS 7810 U | Black · White · Beige | 1.24 | 330 | 80 | 96 | 230 | 27 | 3.3 | 15 |
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The grades below are not in the catalog; values are from the TDS, converted to kgf units.
TS 700 Series Properties (ASTM)
| Properties | Standard | Unit | Results | |||
|---|---|---|---|---|---|---|
| Properties | Standard | Unit | TS 741 U | TS 751 U | TS 761U | TS 771 U |
| Appearance | ASTM E1767 | - | BK/WH/ BEIGE | BK/WH/ BEIGE | BK/WH/ BEIGE | BK/WH/ BEIGE |
| Williams Plasticity | ASTM D926 | mm/100 | 150 | 200 | 240 | 280 |
| Specific gravity | ASTM D792 | - | 1.12 | 1.19 | 1.27 | 1.34 |
| Hardness | ASTM D2240 | Shore A | 41 | 50 | 62 | 72 |
| Tensile Strength | ASTM D412 | kgf/cm² | 84 | 80 | 85 | 88 |
| Elongation at break | ASTM D412 | % | 593 | 460 | 368 | 221 |
| Tear strength, Type C | ASTM D624 | KN/m | 24 | 22 | 20 | 18 |
| Linear Shrinkage | JIS K6249 | % | 4.0 | 3.8 | 3.5 | 3.2 |
| Compression set (175℃, 22hr) | ASTM D395 | % | 12 | 10 | 10 | 9 |
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Properties obtained using 0.8 part of SC-8B(50P)(2,5-bis(tert-butylperoxy)-2,5-dimethyl hexane) on 2mm thick slabs: molded 10 minutes at 170℃ and post-cured 4 hours at 200℃.
Change after Aging — 250℃×72h
| Results | 200℃Ⅹ4hrs Plus 250℃Ⅹ72hrs | |||
|---|---|---|---|---|
| Results | TS 741 U | TS 751 U | TS 761U | TS 771 U |
| Change point after aging, Hardness | 0 | 0 | 0 | 0 |
| Change % after aging, Tensile St. | -13 | -10 | -12 | -13 |
| Change % after aging, Elongation | -1 | -4 | -1 | -1 |
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Change after Aging — 300℃×24h
| Results | 200℃Ⅹ4hrs Plus 300℃Ⅹ24hrs | |||
|---|---|---|---|---|
| Results | TS 741 U | TS 751 U | TS 761U | TS 771 U |
| Change point after aging, Hardness | +3 | +4 | +3 | +3 |
| Change % after aging, Tensile St. | -24 | -20 | -12 | -15 |
| Change % after aging, Elongation | -26 | -21 | -23 | -24 |
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Change after Aging — 300℃×72h
| Results | 200℃Ⅹ4hrs Plus 300℃Ⅹ72hrs | |||
|---|---|---|---|---|
| Results | TS 741 U | TS 751 U | TS 761U | TS 771 U |
| Change point after aging, Hardness | +16 | +15 | +14 | +15 |
| Change % after aging, Tensile St. | -33 | -24 | -16 | -19 |
| Change % after aging, Elongation | -63 | -55 | -58 | -58 |
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Product Photo
Ultra Heat Resistance
Technical Data Downloads
TDS files are in English; MSDS (Material Safety Data Sheets) are Korean PDFs. Please contact us for grades without an MSDS.