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 changingin using, good stability in forming.
	High mechanical strength	Good modulus, good extension performance,high tensile strength, the lateral pressure of loosetube 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 reagent atroom temperature. And PBT is not compatible withfilling 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

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. Storage and transport 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	Standardrequirement	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
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）℃;