China Female Header

The following is the China Female Header of mold temperature on crystallinity. The highest resin crystallinity is 65%. PPS products will also increase crystallinity after annealing. Annealing conditions vary with the wall thickness of the product, generally 200°C-240°C, 2-4 hours. Annealed products have stable characteristics due to the elimination of internal residual stress (increased dimensional stability and screw retention after annealing). However, due to crystallization during annealing, the product shrinks due to crystallization, so you must first consider annealing And the resulting size changes.

Generally, as the crystallization of the resin increases, the physical properties of the product change as follows: (1) Heat distortion temperature increases (high temperature characteristics) (2) Rigidity increases (modulus of elasticity increases) (3) Tensile strength at room temperature is slightly lower, but The tensile strength in high temperature cloud gas is improved. (4) In cloud gas, the flexural strength below 95°C decreases, but the flexural strength increases above 95°C. (5)

Reduced impact strength (6) Excellent creep resistance due to dimensional change over time (7) Improved shear strength (8) The surface gloss of the product becomes better (but if the annealing treatment deteriorates) (9) The surface hardness is slightly Increased (10) Increased shrinkage rate, improved stability at high temperature dimensions (11) Reduced linear thermal expansion coefficient 3.4 Recycled materials

Now the research in the field of TLCP in China has a new development direction, that is to synthesize multiple liquid crystal copolyesters, and use the characteristics of various monomers in the multiple liquid crystal copolyesters to complement each other to further balance the performance of TLCP. In order to obtain LCP with more comprehensive performance. (2) 

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