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Serial number | Project | Premium | First grade | Qualified product | ||||
1 | Intrinsic viscosity/ | M1a±0.012 | M1±0.015 | M1±0.020 | ||||
2 | Melting point/℃ | M2b±2 | M2±3 | M2±4 | ||||
3 | Condensed carboxyl group content/(mol/t) | M3c±4 | M3±5 | M3±5 | ||||
4 | Chroma b value | M4d±2.0 | M4土2.0 | M4±2.5 | ||||
s | Moisture/%* | 0.4 | 0.4 | 0.5 | ||||
6 | Aggregated particles/(pieces/mg) right | 1 | 4 | 6 | ||||
7 | Diethylene glycol content/% | M5e±0.3 | M5±0.4 | M5±0.5 | ||||
8 | Iron/(mg/kg)< | 2 | 5 | 6 | ||||
9 | Powder/(mg/kg)< | 100 | ||||||
10 | Abnormal section / % right | 0.4 | 0.5 | 0.6 | ||||
aM₁ is the central value of intrinsic viscosity, which is determined by negotiation between the supplier and the buyer, and shall not be changed arbitrarily after determination. bM2 is the central value of the melting point, which is determined by negotiation between the supplier and the buyer, and shall not be changed arbitrarily after determination. cM3 is the central value of the mouth base content, which is determined by the supply and demand sides within the range of 14mol/t ~ 36mol/t, and shall not be arbitrarily changed after determination. dM4 is the central value of the chromaticity b value, which is determined by both the supply and demand sides within the range of <8.0, and shall not be arbitrarily changed after determination. eM5 is the central value of diethylene glycol content, which is determined by both the supply and demand sides within the range of 0.6% to 2.0%, and shall not be arbitrarily changed after determination. | ||||||||
Serial number | Project | Premium | First grade | Qualified product | ||||
1 | Intrinsic viscosity/(d1-/g) | M1a±0.012 | M1±0.015 | M1±0.020 | ||||
2 | Melting point/℃ | M2b±2 | M2±3 | M2±4 | ||||
3 | Carboxyl group content/(mol/t) | M3c±4 | M3±5 | M3±5 | ||||
4 | Chroma b value | M4d±2.0 | M4±2.0 | M4±2.5 | ||||
5 | Moisture/%< | 0.4 | 0.4 | 0.5 | ||||
6 | Aggregated particles/(pieces/mg)* | 1 | 4 | 6 | ||||
7 | Diethylene glycol content/% | M5e±0.3 | M5±0.4 | M5±0.5 | ||||
8 | Iron/(mg/kg)A | 2 | 4 | 6 | ||||
9 | Powder/(mg/kg)A | 100 | ||||||
10 | Abnormal section / % right | 0.4 | 0.5 | 0.6 | ||||
11 | Ash (oxygen-containing additive and modified catalyst)/(mg/kg) | M6f×(1±8%) | ||||||
aM1 is the central value of intrinsic viscosity, which is determined by negotiation between the supplier and the buyer, and shall not be changed arbitrarily after determination. bM2 is the central value of the melting point, which is determined by negotiation between the supplier and the buyer, and shall not be changed arbitrarily after determination. cM3 is the central value of the mouth base content, which is determined by the supply and demand sides within the range of 14mol/t ~ 36mol/t, and shall not be arbitrarily changed after determination. dM4 is the central value of the chromaticity b value, which is determined by both the supply and demand sides within the range of <8.0, and shall not be arbitrarily changed after determination. eM5 is the central value of diethylene glycol content, which is determined by both the supply and demand sides within the range of 0.6% to 2.0%, and shall not be arbitrarily changed after determination. fM6 is the central value of ash (including solvent additives and modified catalysts), which is determined by negotiation between the supplier and the buyer, and shall not be arbitrarily changed after determination. | ||||||||












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