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Alkali-soluble polyester chips WDPET

WDPET is a kind of polyester chip for sea-island spinning,which is further modified on the basis of COPET. In addition to retaining the advantages of COPET's excellent spinnability, low thermal degradation, and clear cross-section, It also get the characteristics of higher spinning speed and faster fiber opening by adjusting the proportions of components and conditions of polymer chain formation.


Message

Product Features:


Product introduction as above

Main quality index:

 Quality index of WDPET


Serial number

Item

Unit

Value

1

Intrinsic viscosity

dl/g

M1±0.015

2

Diethylene glycol

%

3.5±0.15

3

Carboxyl end groups

mol/t

≤20

4

Melting point

≥244

5

Color value

L


48

b


M2±2

a


≤-0.5

6

Moisture

%

≤0.4

7

Solubility

%

72±5


Note:


1.The M1 in the table is the median value of intrinsic viscosity.in general M1=0.61 or it should be determined by both buyer and seller.


2.M2 in the table is the median value of color b,  special requirement M2=2 or it should be determined by both buyer and seller.


[Test method:]

All the above medxes are tested colording to GB/T14190-93, and the solvent used in the intrinsic viscosity test is phenol tetrachloroethane:(1:1), the melting point is tested with microscope method, and the color with Hunter tricolor method.


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