材料介紹
低 壓 成 型 材 料 介 紹
Demands for Improvements
➨ higher water resistance
➨ lower application temperature
➨ higher chemical resistance
Benchmark: PA-Hot Melts forPotting
Properties | SYP PA1 | SYP PA | SYP 180 |
colour | natural & black | natural & black | natural & black |
Viscosity at 170℃ | 10500 | 9950 | 10500 |
Viscosity at 200℃ | 2400 | 3400 | 2400~4000 |
Open Time [s] | 10-15 | 20 | 7-9 |
Melting Point - Ring & Ball [℃] | 160 | 149 | 180 |
Density [g/cm] | 0.96 | 0.96 | 0.98 |
Tensile Strength [MPa] | 3.1 | 2.9 | 3 |
Elongation at Break [%] | 120 | 160 | 110 |
Shore A | 85 | 77 | 90 |
Shore D | 20 | 18 | 36 |
Heat Resistance [℃] | 120 | 110 | 145 |
Adhesion after CCT | PBT +30％ | PA6 PA66+30 ％ | PBT +30 ％ |
TestMethods
- •Water Resistance
Nr.
Test
Number of test samples
1
Stress-strain diagram after storage in H2O at 85 °C Storage times: 1,2,4,8,16,32 days
0-reference after 14 d at RT, 50 % r.h.
Test:
Measurement at RT, 2 h after taking out
a)Measurement of weight increase in %, mean value of 5 samples
b)Tensile test, 5 samples/storage time, cross-head speed: 100 mm/min
Presentation: table
35 tensile test bars
+ 5 extra
- •Mechanical Properties at Using Temperature
Nr.
Test
Number of test samples
2
Stress-strain diagram at
a) -40 °C
b) RT
c) + 85 °C
Test:
5 samples/temperature
Measurement after 14 d at RT, 50 % r.h.
Cross-head speed: 100 mm/min
Presentation: diagram σ vs. ε, table
15 tensile test bars
+ 5 extra
- •Ageing
Nr.
Test
Number of test samples
3
Accelerated aging
Tensile test (σ, ε) after storage at
a) 130 °C
b) 140 °C
c) 150 °C
Storage times: 1,2,4,8,16,32 (64) days
2 x 0-reference after 2 h at RT, 50 % r.h.
Test:
5 samples/storage time
Measurement at RT, 2 h after taking out
Cross-head speed: 100 mm/min
105 tensile test bars + 5 extra
- •Shrinkage
Nr.
Test
Number of test samples
4
Shrinkage measurements on plaques 125 x 100 x 4 mm
a)Processing shrinkage after 48 h
b)Post shrinkage, 2 h at 85 °C
5 plaques
- •Influence of Humidity
Nr.
Test
Number of test samples
5 Influence of humidity
5.1 Extraction of electrically conductive substances out of the Hot Melt after storage in distilled H2O, 85 °C,
1 and 3 d
0-referenz (virgin sample)
3 test samples with void
+ 3 extra
5.2.Infiltration of electrically conductiv substances after storage in contaminated H2O at 85 °C;
1,2 and 4 d Solutions:
a)H2O dist. + 5 w.-% NaCl +
5 w.-% CaCl2
b)H2O dist. + 10 w.-% Na2SO4
Test:
Opening of the void, measurement on the void surface inside. Method for 5.1 and 5.2
X-ray fluorescence, Analysis for: Na, P, S, Cl, K, Ca
Table + graph
6 test samples with void
+ 3 extra
5.3 Storage in oleic acid, RT; 1,2 und 4 d
Test:
Opening of the void, measurement on the void surface inside. Method for 5.3: IR- spectroscopy Analysis: appearance of the peak of the carbonyl group of oleic acid in the Hot Melt
Presentation: IR-spectra
3 test samples with void
- •Water Pick-up
Nr.
Test
Number of test samples
6
Water pick-up
H2O pick-up after storage in
a) water at 85, 70, 60, 20 °C
b) 85 °C, 95 % r.h.
Storage times: 1,2,4,8,16,32 days
Test:
Test sample: 20 x 20 x 4 mm
Weight increase in %, mean value of 3 samples
Measurement within 2 h after taking out
Presentation: table + graph
90 test samples
+ 10 extra
- •Adhesion
Nr.
Test
Number of test samples
7
Adhesion strength after storage in water, 85 °C ;
1,2 and 3 weeks, 0-reference,
100 temperature cycles,
3 test samples/storage time
7.1 Peel test Hot Melt/tail
2 different tails (PI und PET)
50 tails disposition SV 7.2 Pull-out test Hot Melt/harness 2 different cables (PVC u. PU)
25
cables/material disposition SV
7.3 Peel test and Pull-out test after 100 cycles
-40 °C (30 min), 85 °C (30 min)
- •Coefficient of Thermal Expansion
Nr.
Test
Number of test samples
8
Determination CTE-value
Range: -40 °C up to 110 °C,
Heating/cooling/heating, rate 3 K/min
低壓成型 / 低壓射出 / 低壓注塑 / 熱熔膠成型 / 熱熔膠射出 / 熱熔膠注塑 / 取代塑膠射出 / 低壓成型代工 / 低壓射出代工 / 低壓射出模具開發 / 低壓成型材料 / 熱熔膠材料 / 低壓成型LPM / Low Pressure Molding / LPM /
