KR910020208A - Polyester fiber with excellent dimensional stability - Google Patents

Abstract

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Description

Polyester fiber with excellent dimensional stability

Since this is an open matter, no full text was included.

1 is an enlarged cross-sectional view of the microstructure of the fiber according to the present invention, where Lp is the long period, Lc is the crystal size of the crystal plane perpendicular to the molecular chain, and La is the size of the non-crystalline region, and FIG. As a curve showing the heat shrink stress behavior, the curve (a) is the heat shrink stress curve of the commercialized conventional fiber, and (b) the curve shows the heat shrink stress curve of the fiber according to the present invention.

Claims (2)

In a polyester fiber prepared by melt spinning and solidifying a polyester resin containing polyethylene terephthalate as a main component, followed by stretching by spin drawburn, the polyethylene terephthalate has a melting point of 260 ° C. or higher and a heat of fusion of 16 cal / g It is more than 30,000 poise of melt viscosity at 300 ℃, the polyester drawn yarn produced therefrom has a distinct long period structure of the molecular chain, the dimensions characterized by satisfying the following conditions (1) to (8) Polyester fiber with excellent stability. (1) Strength of 105kg / m㎡ or more, (2) Initial modulus of elasticity of 1350kg / m² or more, (3) Dimensional stability of 11% or less, which is the sum of dry heat shrinkage and the median elongation at 4.5kg. 4) The ratio of the median elongation at 4.5 kg of the dimensional stability value is less than 50%, (5) the dry heat shrinkage stress at 0.3 ° C. or less at 0.30 g / d, and the heat shrinkage stress at 0.4 ° C. at 0.45 g / d. Hereinafter, (6) the long period value of the molecular chain is 130 to 150 kHz, (7) the peak temperature Tmax of the main dispersion, α, which is a dynamic loss dispersion solid state in the amorphous region of polyethylene terephthalate, and α is 120 to 130 ° C, and the loss modulus at that time E ″ αmax is 7.0 x 10 ⁹ dyne / cm 2 or less, and the peak temperature Tmax of β-partic acid, β is -10 to -5 ℃, (8) the molecular chain in the dynamic loss elastic dispersion curve in the long period region of polyethylene terephthalate The peak temperature of the glass transition temperature tan δ is 135 to 150 ° C. The polyester fiber according to claim 1, wherein the crystal size of the crystallographic region in the long period value is 50 GPa or more, and the size of the amorphous region is 100 GPa or less. ※ Note: The disclosure is based on the initial application.