Type and application
|
Type |
Product |
Application and advantages |
|
GL3018 |
PBT resin |
Secondary Coating Materials Used for Optical Fiber |
Product description
PBT is very important secondary coating materials for Optical Fiber, It has excellent performance in mechanical /thermal /hydrolytic / chemical resistance properties and easy to be mechanical processed.
|
Properties |
Advantages |
Description |
|
Mechanical properties |
High stability |
Small shrinkage scale, small volume changing in using, good stability in forming. |
|
High mechanical strength |
Good modulus, good extension performance, high tensile strength, the lateral pressure of loose tube is higher than requirement of standard . |
|
|
Thermal properties |
High distortion temperature |
Whether in the case of high load or low load , the performance of distortion is excellent |
|
Hydrolytic properties |
Anti-hydrolysis |
High performance of anti-hydrolysis make optical cable more longer life than requirement of standard. |
|
Chemical properties |
Chemical resistance |
PBT can tolerate most of polarity chemical reagent at room temperature. And PBT is not compatible with filling gel. at high temperatures and susceptible to erosion. |
Processing technology
The recommended processing temperature：
|
Zone |
Extruder body 1 |
Extruder body 2 |
Extruder body 3 |
Extruder body 4 |
Extruder body 5 |
Flange |
Extruder neck |
Extruder head 1 |
Extruder head 2 |
Hot water |
Warm water |
|
/℃ |
250 |
255 |
260 |
265 |
265 |
265 |
265 |
255 |
255 |
35 |
30 |
Storage and transport
Package: Two package ways, : 1. It is packed 900/1000KG per bag with the inner lining of aluminum foil material, outer lining of PE woven material. 2. It is packed 25KG per bag with inner lining of aluminum foil material , outer lining of kraft paper material.
Transportation: It should not be exposed to get wet or humidity during transportation, and keep it dry, clean, complete and pollution-free.
Storage: It is stored in a clean, cool, dry and ventilated warehouse away from the source of fire. If the product is found to be damped in rainy reason or with high moisture in the air, It can be used one hour later after it is dried at the temperature of 120℃ .
GL3018 properties
|
No. |
Inspected properties |
Unit |
Standard requirement |
Typical |
Inspection method |
|
1 |
Density |
g/cm3 |
1.25 ～ 1.35 |
1.31 |
GB/T1033-2008 |
|
2 |
Melting Index（250℃、2160g） |
g/10min |
7.0 ～ 15.0 |
12.5 |
GB/T3682-2000 |
|
3 |
Moisture content |
% |
≤0.05 |
0.03 |
GB/T20186.1-2006 |
|
4 |
Water Absorption |
% |
≤0.5 |
0.3 |
GB/T1034-2008 |
|
5 |
Tensile strength at yield |
MPa |
≥50 |
52.5 |
GB/T1040.2-2006 |
|
Elongation at yield |
% |
4.0 ～ 10 |
4.4 |
GB/T1040.2-2006 |
|
|
Elongation at break |
% |
≥100 |
326.5 |
GB/T1040.2-2006 |
|
|
tensile modulus of elasticity |
MPa |
≥2100 |
2241 |
GB/T1040.2-2006 |
|
|
6 |
Flexural modulous |
MPa |
≥2200 |
2243 |
GB/T9341-2000 |
|
Bending strength |
MPa |
≥60 |
76.1 |
GB/T9341-2000 |
|
|
7 |
Melting point |
℃ |
210 ～ 240 |
216 |
DTA 法 |
|
8 |
Shore hardness |
– |
≥70 |
73 |
GB/T2411-2008 |
|
9 |
Izod impact 23℃ |
KJ/m2 |
≥5.0 |
9.7 |
GB/T1843-2008 |
|
Izod impact -40℃ |
KJ/m2 |
≥4.0 |
7.7 |
GB/T1843-2008 |
|
|
10 |
Coefficient of linear expansion （23 ～ 80℃） |
10-4K-1 |
≤1.5 |
1.40 |
GB/T1036-1989 |
|
11 |
Coefficient of volume resistance |
Ω.cm |
≥1×1014 |
3.1×1016 |
GB/T1410-2006 |
|
12 |
Heat distortion temp 1.8M pa |
℃ |
≥55 |
58 |
GB/T1634.2-2004 |
|
Heat distortion temp 0.45 M pa |
℃ |
≥170 |
178 |
GB/T1634.2-2004 |
|
|
13 |
thermal hydrolysis |
||||
|
Tensile strength at yield |
MPa |
≥50 |
51 |
GB/T1040.1-2006 |
|
|
Elongation at break |
% |
≥10 |
100 |
GB/T1040.1-2006 |
|
|
14 |
Compatibility between material and filling compounds |
||||
|
Tensile strength at yield |
MPa |
≥50 |
51.8 |
GB/T1040.1-2006 |
|
|
Elongation at break |
% |
≥100 |
139.4 |
GB/T1040.1-2006 |
|
|
15 |
Loose tube anti side pressure |
N |
≥800 |
825 |
GB/T228-2002 |
|
16 |
Appearance |
GB/T20186.1-2006 3.1 |
According to |
GB/T20186.1-2006 |
|
Note: 1.The product should be dried and sealed package. It is recommended to use hot air to avoid moisture before using. temperature controlled within （80~90）℃; For the moisture absorption after opening the package, It should be dried at 120℃ within 2~3 hours. 2.According to the size requirements of Loose Tube, the process parameters controlled by optical fiber’s surplus length should be adjusted. 3.The above results are obtained based on specific production location and specific time to get sample.