Differences between recycle DTY yarn andoriginalyarn
1.Compared with the original polyester DTY, the surface of the recycled polyester DTY contains more granular substances, and there is no obvious difference in molecular structure between therecycledpolyester DTY and the original polyester DTY;
2. The crystallinity ofrecycledpolyester DTY is lower than that of original polyester DTY, and the crystallinity of physicalrecycledpolyester DTY is the lowest;
3.The glass transition temperature, melting point and melting heat of PET DTYrecycledby chemical method are similar to those of original PET DTY, while thoserecycledby physical method are lower;
4.The thermal stability ofrecycledpolyester DTY is slightly worse than that of original polyester DTY;
5.The breaking strength ofrecycledpolyester DTY is lower than that of original polyester DTY, while the elongation at break of physicalrecycledpolyester DTY is higher, and the variation coefficients of the breaking strength and elongation at break ofrecycledpolyester DTY are also higher;
6.The crimp shrinkage, crimp stability and boiling water shrinkage of PET DTYrecycledby chemical method are similar to those of original PET DTY, while thoserecycledby physical method are obviously smaller.