GB/T 20186.1-2006Secondary coating materials used for optical fiber Part 1: Polybutylene terephthalate (English PDF)

3.1 Appearance

The product is the milky white, milky yellow or colorless transparent cylindrical particles with diameter of 2mm~4mm, length of 2mm~4mm. The particles shall be smooth, free of impurities and free of beads.

4.1 Appearance

Visually examination under natural light.

4.2 Specimen preparation

The specimen preparation required by each property in Table 1 shall, refer to the method specified in GB/T 17037.1, specially performed according to the method specified in Appendix A (normative).

4.3 Standard environment for conditioning and testing of plastic specimens

It shall be performed according to the Conditions 2, 3, 4 in GB/T 2918-1998.

4.4 Density

It shall be performed according to the method specified in GB/T 1033.

4.9 Bending strength, bending modulus of elasticity

It shall be performed according to the method specified in GB/T 9341. Adopt the standard specimen of (80×10×4) mm³-type. The test speed shall be (2.0±0.4) mm/min.

4.10 Melting point

It shall be performed according to the method specified in GB/T 2951.37.

4.11 Shore hardness HD

It shall be performed according to the method specified in GB/T 2411.

4.12 Izod impact strength

4.12.1 It shall be performed according to the method specified in GB/T 1843. The length and width of the standard specimen are 80mm and 10.2mm, respectively; the height range is 4mm~10.2mm.

4.17 Thermal hydrolysis property

The test method of thermal hydrolysis properties may be selected according to the actual situation of the material supplier and purchaser.

4.17.1 Determination of strength

4.17.1.1 The specimen shall be the Type-I dumbbell standard specimen specified in GB/T 1040, and prepared according to the Appendix A (Normative). 4.16.

4.18 Compatibility between material and filling ointment

5.1 Exit-factory inspection

5.1.3 According to the requirements of Clause 3, the inspection items in 3.1 and 3.2

5.1.4 If the exit-factory inspection is unqualified, then the products shall be unqualified.

If product properties do not meet the requirements in 3.1 and 3.2 Table 1, then it is said that the exit-factory inspection is unqualified.

If there are one or more unqualified unit products, then they are called unqualified products.

5.2 Type inspection

5.2.4 Qualified and unqualified type inspection

5.2.5 Treatment of unqualified type inspection

If the type inspection is unqualified, t hen the material manufacturer shall immediately stop the exit-factory inspection. Immediately analyse the cause, take measures and eliminate the unqualified factors till the new type inspection is qualified, can the exit-factory inspection be restored.

5.3 User acceptance inspection

5.3.1 The user acceptance inspection shall examine all the items in 3.1 and 3.2 Table 1 of Clause 3.

6.1 Mark

6.1.1 The packaging bag of the products that inspected qualified shall be indicated the name of the materials, code, trademark, designation, batch number (or date of production), standard number, quality, manufacturer (including address, telephone, post code); and have the marks for "heat-proof" and "moisture-proof".

6.2 Package

The product is applied with negative pressure packaging with inner packaging of composite metal film and outer packaging bag with moisture-proof composite paper; or negative pressure packaging with packaging bags negotiated between the supplier and the purchaser.

6.3 Transportation

When transporting the products, do not expose them to the sun and rain; and keep them dry, clean, intact and pollution-free.

6.4 Storage

The products shall be stored in a clean, dry, cool and ventilated warehouse. The storage period shall be one year since the date of production. […]