成品介紹
PVC線材接著劑
SYPM3000
Low Pressure molding PVC TPU TPE Cable bond Hot melt copolyamide
何謂低壓防水成型?
近代為滿足精密零組件和模組的關鍵零組件(如印刷電路板、傳 感器、電源裝置、連接器/線..等)防水及保護需求,因此提供 低壓射出成型技術解決方案。
相對於傳統射出成型高達400bar射出壓力及攝氏300℃射出溫度, 會造成精密零件之損傷及昂貴模具,相對於低壓射出成型的模
具中只需要40bar的低壓及攝氏240℃就可以完成關鍵零組件等
的封裝工藝,因此通過低壓射出成型方法將線束、連接器、微 動開關、傳感器和電路板等精密、敏感的電子元器件封裝起來, 而不會對其產生傷害。
因此,利用低壓射出成型技術可達到:耐高溫、防水、絕緣、防 潮、防塵、耐衝擊、抗化學腐蝕、延長壽命之各種特性,想要 同時達到此種功能,以一般之PVC射出成型,是無法達成的。
尤為近代5G及自駕汽車的快速發展,對於零件的高頻和散熱有 極高的要求但又需求有防水效能,因此低壓射出成型技術及材 料將可提供安全快速的解決方案。
低壓射出成型製程:
防水 Cable 技術解決方案:
防水邏輯要素:
1.接著材質:連接器 PA PBT ....... 線材 PVC TPE PTU.......
2.水氣侵入路徑:由連接器端進入 由線材端進入......
3.應用環境:工業 汽機車.......
4.測試要求:冷熱衝擊 高溫高濕 搖擺試驗 IP68 IP69K.......
汽車連接器防水應用:
車用鏡頭線材機殼防水:
建議方案2:
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