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Flame-retardant acetate fiber tape and preparation method of acetate fiber

A technology of cellulose acetate and cellulose acetate cloth, which is applied in the direction of artificial filaments, adhesives, film/sheet-like adhesives made of cellulose derivatives, etc., can solve the problem of low spinning efficiency and plasticizer exudation. Or volatilization, poor mechanical properties and other problems, to achieve the effect of easy control of process parameter selection, good mechanical properties and fracture strength, and flexible process parameter selection

Inactive Publication Date: 2013-11-13
SUZHOU LONGJIE SPECIAL FIBER
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In addition, the existing cellulose acetate production uses acetone, which is highly volatile, as a solvent. Acetone has a boiling point of 56°C and a flash point of -20°C. It is easy to explode in the air, which brings certain dangers to acetate fiber production and is not beneficial to the environment; At the same time, it is difficult to dissolve cellulose acetate with acetone as a solvent to obtain a spinning solution with a high mass fraction of cellulose acetate (such as greater than 30%), and the production efficiency is low.
[0007] In order to reduce the adverse impact on the environment during the production process and improve the production efficiency of cellulose acetate, although the research on melt spinning after plasticizing and modifying cellulose acetate has been reported, the technology provided is not an effective plasticizing method. Modification technology, cannot be applied as acetate fiber melt spinning production technology
Japanese patents 5046921, 5442420, 62250215, 978339, 9291414, 10317228, 11506175 etc. add low-molecular plasticizers such as glycerin, polyethylene glycol, ε caprolactone derivatives to the cellulose acetate composition to make fibers, but the In the process of preparing fibers, there are problems such as exudation or volatilization of plasticizers, and the fiber fineness is relatively large, with a diameter of 200-300um, which is not suitable for the preparation of fibers for clothing fabrics.
Patent US6984631B2 uses D-lactic acid and / or L-lactic acid as monomers to carry out graft polymerization with cellulose diacetate and then melt-spins. However, the obtained fibers lack slippery feeling, especially when the amount of polylactic acid grafted is too much, There are problems such as deterioration of fiber heat resistance, increased brittleness and poor processing performance
In addition, Japanese patents 58225101, 5986621, 7179662, 11255801 and other patents grafted ε-caprolactone to the main chain of cellulose acetate. Because the grafted product is prone to side chain flow at low temperature, it cannot be produced as cellulose acetate. technology for application
Chinese patent 201110142220.4 discloses a method for preparing cellulose acetate by dissolving cellulose acetate in an ionic liquid. The tensile breaking strength of the prepared fiber is 1.5-3.5 cN / dtex. However, this patent uses dry-jet wet spinning technology, and the concentration of the spinning solution is Not high (mass ratio of cellulose acetate to ionic liquid is 1:2~20), spinning efficiency is not high
[0008] In summary, the existing cellulose acetate production process has disadvantages such as low production efficiency, large environmental load, low fiber breaking strength, and poor mechanical properties. Ways to Take Acetate

Method used

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  • Flame-retardant acetate fiber tape and preparation method of acetate fiber

Examples

Experimental program
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Effect test

Embodiment 1

[0040] (1) Crush cellulose acetate with a degree of substitution of 2.2, a degree of polymerization of 260, and a weight-average molecular weight of 181,800 to 280 mesh, and after drying, mix with 1-butyl-3-methylimidazolium tetrafluoroborate (BMIMBF4) according to The mass fraction ratio is 2:1 and mixed evenly. The mixture is fed into a twin-screw blender for blending, extrusion, and slicing. The twin-screw blender uses co-rotating screws for blending and extrusion. The temperatures of the feeding section, the melting section, the metering section and the head are respectively 160 ° C to 170 ° C. ℃, 170 ℃, 160~170 ℃, 160 ℃, the speed of the extruder is 10~50 rpm. A colorless and transparent spinning raw material was obtained.

[0041] (2) Put the spinning material into a vacuum oven, and dry it continuously under vacuum for 70 hours at 60°C;

[0042] (3) The spinning material is melt-spun after metering, and the spinning temperature is 170°C. The spinneret hole of the spi...

Embodiment 2

[0045] (1) Crush cellulose acetate with a degree of substitution of 2.3, a degree of polymerization of 360, and a weight-average molecular weight of 235,000 to 250 mesh, and after drying, mix with 1-butyl-3-methylimidazolium tetrafluoroborate (BMIMBF4) according to The mass fraction ratio is 2:1 and mixed evenly. The mixture is fed into the twin-screw blender for blending, extrusion, and slicing. The twin-screw blender uses co-rotating screws for blending and extrusion. The temperatures of the feeding section, the melting section, the metering section and the head are respectively 170 ° C to 180 ° C. °C, 190 °C, 160~170 °C, 160 °C, the speed of the extruder is 50~120 rpm. A colorless and transparent spinning raw material was obtained.

[0046] (2) Put the spinning material into a vacuum oven, and dry it continuously under vacuum for 70 hours at 60°C;

[0047] (3) The spinning material is melt-spun after metering, and the spinning temperature is 190°C. The spinning speed was...

Embodiment 3

[0050] (1) Crush cellulose acetate with a degree of substitution of 2.6, a degree of polymerization of 1000, and a weight-average molecular weight of 400,000 to 300 mesh, and after drying, mix with 1-butyl-3-methylimidazolium tetrafluoroborate (BMIMBF4) according to The mass fraction ratio is 7:1 and mixed evenly. The mixture is fed into the twin-screw blender for blending, extrusion, and slicing. The twin-screw blender uses co-rotating screws for blending and extrusion. The temperatures of the feeding section, the melting section, the metering section and the head are respectively 230 ° C ~ 240 ° C ℃, 240℃, 230~240℃, 230℃. The speed of the extruder is 10 to 30 rpm. A light yellow transparent spinning raw material was obtained.

[0051] (2) Put the spinning material into a vacuum oven, and dry it continuously under vacuum for 30 hours at 120°C;

[0052] (3) The spinning material is melt-spun after metering, and the spinning temperature is 260°C. The spinning speed was 500 ...

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Abstract

The invention belongs to the field of fiber preparation, relates to a flame-retardant acetate fiber tape and a preparation method of acetate fiber in the flame-retardant acetate fiber tape and particularly relates to a preparation method which comprises the steps of carrying out plasticizing modification on cellulose acetate by using ionic liquid serving as a plasticizer, and then, carrying out melt spinning so as to obtain the acetate fiber with high strength. The flame-retardant acetate fiber tape comprises acetate fiber cloth, a flame-retardant rubber type adhesive and an anti-sticking agent, wherein the adhesive is coated on one face of the acetate fiber cloth and the anti-sticking agent is coated on the other face of the acetate fiber cloth. The flame-retardant acetate fiber tape is characterized in that the acetate fiber is prepared by a method which comprises the steps of mixing of cellulose acetate, drying, melt spinning, winding and the like.

Description

technical field [0001] The invention belongs to the field of fiber preparation, and relates to a flame-retardant cellulose acetate tape and a method for preparing cellulose acetate therein, in particular to a method of plasticizing and modifying cellulose acetate with ionic liquid as a plasticizer, and then melt spinning Filament is prepared to obtain a method for the preparation of acetate fibers with higher strength. Background technique [0002] At present, it is widely used in plasma (PDP) and liquid crystal (LCD) TVs, wire insulation shielding and fixing of monitors, DY of color picture tubes (CRT) and monitors (CDT), insulation and fixing of deflection coils (DT), transformers (FBT) ) and the interlayer insulation of the motor, the wrapping shielding of the wiring harness and the fixed tape of various electronic components. Well, the adhesion is not strong, and it will warp after a while. [0003] Cellulose acetate is one of the most important varieties of cellulose ...

Claims

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Application Information

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IPC IPC(8): C09J7/04D01F2/28
Inventor 徐醒我关乐赵满才
Owner SUZHOU LONGJIE SPECIAL FIBER
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