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HMD

HMD. Low CTE High Modulus/stiffness Thinwall design for weight reduction. HMD – high modulus ductile that is clearly over the level provided by existing engineering thermoplastic. COEFFICIENT OF THERMAL EXPANSION. Coefficient of Thermal Expansion. Original Length.

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HMD

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  1. HMD • Low CTE • High Modulus/stiffness • Thinwall design for weight reduction HMD – high modulus ductile that is clearly over the level provided by existing engineering thermoplastic

  2. COEFFICIENT OF THERMAL EXPANSION Coefficient of Thermal Expansion Original Length Increasing temperature Coefficient of Thermal Expansion (CTE)

  3. CTE BETWEENDIFFERENTMATERIALS a Materials CTE Compare to other materials (x 10-5 in./in./oC) Wood Metal Copper Alu Normal PC Normal PPO 0.30 0.65 1.9 1.4 6.84 3.3

  4. CTECALCULATION L DL = a x L x DT DL: Length change a: CTE L: original length DT: temperature change area L=1 in a (metal) ~ 1 X 10-5 in/in-F a (plastic) ~ 5 X 10-5 in/in-F According CTE change，size of materials changed

  5. PCCTE COMPARISON Diffusive HMD -1 Diffusive HMD -2 ASTM E 831

  6. LOW CTE MATERIALSSTATS ANDADVANTAGES Low CTE Resins Reduced Dimensional Change after Thermal Aging Benefits: • Low CTE resins provide an improved balance of modulus and ductility when compared to competing PC/ABS materials. • Low CTE resins allow for smaller gaps between components when compared to unfilled PC/ABS blends. Low CTE PC Properties: • Stiffness while maintaining ductility • Low CTE 4.3 10-5 1/ C • Heat capability to 122 C HDT • Excellent paintability • Minimal post mold shrinkage enhances dimensional stability Normal CTE PC

  7. HIGH BENDING MODULUS/STIFFNESS bending strength Under the load of the deformation and strength

  8. BENDING MODULUS Diffusive HMD -2 Diffusive HMD -1

  9. HIGH MODULUS OF OPTICAL DIFFUSION 1.Diffusive HMD 2. Normal PC diffuser LUX2114

  10. HOT AND COLD TEMPERATURES IMPACTING ON SHAPE TEST • Temperature-Humidity Chamber • Feeler Gauge Model: KT5-469-19 Model: ESL-02KA • Clever Cat Tape

  11. HOT AND COLD TEMPERATURES IMPACTING ON SHAPE TEST • Thermal Shock and Flatness Test Test Procedure 1) 25oC, Length and gap width test; 2) Put sample in the oven(-10oC,1h) and then do the length test instantly; 3) Leave sample in room temperature(25oC,1h), and then do the length test; 4) Put sample in the oven(40oC, 24h) and then do the length and gap width test instantly. Length Test Thermal Shock Test Gap Width Test

  12. AGING TEST PROCEDURE Diffusive HMD 老化 普通 PC 1500mm aging testing@240hrs 1200mm aging testing@240hrs Power on 12hrs test 12hrs test Repeat aging testing test test 12hrs 12hrs Power off Cycle 2 @room temperature Cycle 1 @room temperature

  13. OPTICAL TEST • Integrating Sphere • Feeler Gauge • Laboratory Electronic Balance • Steel ruler & vernier caliper

  14. RELIABILITY TEST RESULTS Cold and hot impact Aging test * 1200mm/0.6mm T8 full plastic tube light

  15. OPTICAL TEST Diffusive HMD 0.6mm/1200mm Diffusive HMD 0.6mm/1500mm

  16. OPTICAL TESTING – MASS PRODUCTION PELLETS 量产放大测试 翘曲度测试数据 光效测试数据

  17. PRESSURE BENDING TEST Pogo Model: 9505S ： Pogo Test Machine/Pogo

  18. PRESSURE BENDING TEST PARAMETERS AND PROCESS Parameter setting Max. loading setting=30 kgf 30 Tip Diameter= 10.0 mm Span行=480 mm Speed setting=20 mm/min Test Procedure 1) Lay the LED tube on the correct position to get the tube in the center; directly below pressurehead. The two endsof thetube are then fixed on the platform by double-sided tape. 2) Carry out the pogo test and observe the tube compressive behavior.

  19. BENDING STRESS TEST RESULTS The curve of pressure bending test

  20. OVERALL MAINADVANTAGES • High modulus. • Low thermal expansion coefficient. • Thin design/weight loss. • V0 Fireproof. • The spread of the flexible degree/optical adjustment space.

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