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  • Alkali-soluble polyester chips WDPET

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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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