Products
GL3018LN with excellent performance used for Optical Fiber
Type and application
| Type | Product | Application and advantages |
| GL3018LN | PBT resin used for optical fiber | Secondary Coating Materials Used for blowing Tiny 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 volumechanging in using, good stability in forming. |
| High mechanical strength | Good modulus, good extension performance,high tensile strength, the lateral pressure ofloose 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 opticalcable more longer life than requirement of standard. |
| Chemical properties | Chemical resistance | PBT can tolerate most of polarity chemical reagentat room temperature. And PBT is not compatiblewith filling gel. at high temperatures andsusceptible to erosion. |
Processing technology The recommended processing temperature：
| Zone | Extruderbody 1 | Extruderbody 2 | Extruderbody 3 | Extruderbody 4 | Extruderbody 5 | Flange | Extruderneck | Extruderhead 1 | Extruderhead 2 | Hotwater | Warmwater |
| /℃ | 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℃ .
GL3018LN 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 | 55.1 | GB/T1040.2-2006 |
| Elongation at yield | % | 4.0 ～ 10 | 5.2 | GB/T1040.2-2006 | |
| Elongation at break | % | ≥50 | 163 | GB/T1040.2-2006 | |
| tensile modulus of elasticity | MPa | ≥2100 | 2316 | GB/T1040.2-2006 | |
| 6 | Flexural modulous | MPa | ≥2200 | 2311 | GB/T9341-2000 |
| Bending strength | MPa | ≥60 | 76.7 | GB/T9341-2000 | |
| 7 | Melting point | ℃ | 210 ～ 240 | 218 | DTA 法 |
| 8 | Shore hardness | - | ≥70 | 75 | GB/T2411-2008 |
| 9 | Izod impact 23℃ | KJ/m2 | ≥5.0 | 9.4 | GB/T1843-2008 |
| Izod impact -40℃ | KJ/m2 | ≥4.0 | 7.6 | GB/T1843-2008 | |
| 10 | Coefficient of linear expansion（23 ～ 80℃） | 10-4K-1 | ≤1.5 | 1.44 | GB/T1036-1989 |
| 11 | Coefficient of volume resistance | Ω.cm | ≥1×1014 | 4.3×1016 | GB/T1410-2006 |
| 12 | Heat distortion temp 1.8M pa | ℃ | ≥55 | 58 | GB/T1634.2-2004 |
| Heat distortion temp 0.45 M pa | ℃ | ≥170 | 174 | GB/T1634.2-2004 | |
| 13 | thermal hydrolysis | ||||
| Tensile strength at yield | MPa | ≥50 | 54.8 | GB/T1040.1-2006 | |
| Elongation at break | % | ≥10 | 48 | GB/T1040.1-2006 | |
| 14 | Compatibility between material and filling compounds | ||||
| Tensile strength at yield | MPa | ≥50 | 54.7 | GB/T1040.1-2006 | |
| Elongation at break | % | ≥100 | 148 | GB/T1040.1-2006 | |
| 15 | Loose tube anti side pressure | N | ≥800 | 983 | 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）℃;
Our products are made from the primary raw materials.Meanwhile, during the production, we constantly make the technology innovation and product optimization. In order to provide the better products and service for our customers, we make the strict management and control for the production process. Our product quality have received high praise from our customers. We are looking forward to establish a long business relationship with you.
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