SY/T 5660-2020 in English

Key parameter requirements

The standard stipulates that the intrinsic viscosity tested by the Ubbelohde viscometer must be ≥6.0 100mL/g, the apparent viscosity of 1% aqueous solution must be ≥30.0mPa·s, and the linear expansion reduction rate of the core must be＞50%. After hot rolling at 120℃ for 16h, salt-resistant products must still maintain the following:

• Apparent viscosity＞10.0mPa·s
• Low-temperature and low-pressure filtration loss reduction rate＞60%

Inspection link

Sampling shall be carried out in accordance with GB/T 6679, and the total amount ≥1kg shall be divided into 3 portions. Special attention:

1. The intrinsic viscosity test needs to be controlled at a constant temperature of 30℃
2. The flocculation time measurement needs to use a 250mL stoppered measuring cylinder with a scale
3. Before the high temperature performance test, nitrogen must be passed at 0.7MPa for 30s

Safety protection

The standard adds Chapter 7 with clear requirements:

• Operators need to wear protective glasses
• When materials are scattered, they must be immediately adsorbed with inert materials
• Waste packaging should be uniformly recycled