Light-storing fiber with high luminance

Abstract

The technical problem to be solved by the present invention is to provide a high-brightness light-storing fiber, which is prepared by melt-spun spinning of light-storing master batch. Based on the total weight of the light storage masterbatch, the light storage masterbatch contains the following components and the sum of the components is 100 wt%: a) 50% to 95% by weight of the thermoplastic (polymer) resin, wherein the thermoplastic polymer may be selected from polyester powder and polyester particles, and the polyester powder or particles have an intrinsic viscosity (IV) of 0.2 to 2.0; b) 1%to 30% by weight of the modified light-storing powder which is an aluminate doped rare-earth element, and has the general formula M1-xAl2O4 uyNz, wherein M is Sr, Mg, Ca or Ba; N is Td, Dy, La, Ce, Mn, Sm, Gd, Pr, Lu, Ho, Y, Yb, Tm or Er; and 0.33<=X<=0.6, 0.008<=Y<=0.002, 0.002<=Z<=0.005; c) and 0.01% to 5% by weight of the antioxidant. The light-storing fiber satisfies the following conditions:(1) after irradiation with a D65 light source at 200 LUX for 20 minutes, the initial luminance can reach 150 mcd / m2 or more; (2) after irradiation with a D65 light source at 25 LUX for 25 minutes, the initial luminance can reach 50 mcd / m2 or more. In one aspect, the present disclosure provides a light-storing masterbatch.

Description

technical field [0001] The invention relates to a light storage fiber, in particular to a light storage fiber which can exhibit high luminance under low light source conditions. Background technique [0002] In recent years, in order to improve the visibility of fabrics in the dark, optically active fibers have been widely used in different fields. [0003] The light-emitting principle of light-storage materials is to use light-storage materials to absorb visible light, ultraviolet light or sunlight, and when the light source is removed, an afterglow called phosphorescence can be emitted. Adding light-storing materials to fibers to make light-storing fibers, not only does not require dyeing, the fiber absorbs visible light or sunlight during the day to produce electronic energy level transitions, and at night or in the dark, it can emit afterglow of various colors to improve visibility. [0004] In the past, this light-storing fiber was made by adding sulfide as a light-sto...

AI Technical Summary

Problems solved by technology

In JP-112414, zinc sulfide is used as the main material of the composite light-storing fiber, and the disadvantages of the above fibers are weak luminance and short luminous time. m 0.9995 Eu 0.0005-0.002 ) Al 2 o 4 ·(M 0.9995 Eu 0.0005-0.002 )O·n(Al b-a B b Q a ) 2 o 3 , M can be at least one element of Sr, Ca, Mg, Ba, Q is La, Ce, Pr, Nd, Sm, Gd, Tb, Dy, Ho, Er, Tm, Yb, Y, Lu, Mn and Bi At least one element in the element, a=0.0005~0.002, b=0.001~0.35, n=1~8, and Japanese Patent Application No. 2000-136438 adopts light-storing powder of this structure to make polyolefin fiber, and because poly The melting point of olefin is 160°C, and the processing process is prone to melting due to high temperature, and the specific gravity is less than 0.9, so it is impossible to make fine fiber, and there is also the problem that it cannot be dyed

[0005] China Taiwan Patent No. 564268 discloses "high-brightness night-time optically active fiber and its manufacturing method", which adopts the luminous powder obtained by sintering, and adds polyester resin or polyolefin resin to the powder as the core-sheath fiber The core and the sheath are made of polyester that does not contain luminous powder. It contains 7-25% of luminous optical powder. It is irradiated with 1000LUX for 30 minutes, and the brightness is recorded over time. After 2 minutes after stopping the irradiation, although The luminance can reach 280mcd / m 2 Above, but after 10 minutes, its luminance decays to more than 80%, and after 1 hour, the luminance is only 2.3% to 4.2% of the luminance after 2 minutes.

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