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Preparation method for flame-retardant anti-dripping polyester fiber

A polyester fiber and anti-droplet technology, which is applied in the manufacture of fire-resistant and flame-retardant filaments, melt spinning, fiber treatment, etc., can solve the problems of large addition amount and adverse effects on the performance of polyester materials, and achieve enhanced charring capacity, high limiting oxygen index, and the effect of reducing production costs

Inactive Publication Date: 2019-12-20
DONGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The methods described in the above patents use methods such as copolymerization type flame retardant modification, blending type flame retardant modification, and fiber fabric flame retardant finishing, all of which have the effect of improving the flame retardant performance of polyester, but in order to achieve better flame retardant effect, usually a large amount of addition is required, which will inevitably have an adverse effect on the bulk properties of polyester materials

Method used

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  • Preparation method for flame-retardant anti-dripping polyester fiber

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] A preparation method of flame-retardant and drip-resistant polyester fiber includes the following steps:

[0025] (1) Take 70 PET slices and place them in a forced-air drying oven, dry at 90°C for 2 hours, and then heat to 170°C and dry for 4 hours. Take 30 parts of hyperbranched polysiloxane coated ammonium polyphosphate flame retardant I (A-S) (chemical structural formula: ) Stir evenly with the PET chips, and then feed into the twin-screw extruder for melt blending. The temperature of each zone of the twin-screw extruder is: zone one 260℃, zone two 265℃, zone three 270℃, zone four 270℃, The fifth zone is 270°C, the main engine speed is 5.8rpm, the feeder speed is 4.7rpm, and the pelletizer cuts the extruded melt to prepare PET / AS masterbatch.

[0026] (2) Mix 20 parts of PET / A-S masterbatch and 80 parts of PET chips uniformly, place them in a blast drying oven, first dry at 90°C for 2 hours, then heat up to 170°C and then dry for 4 hours. After drying is completed, it i...

Embodiment 2

[0029] A preparation method of flame-retardant and drip-resistant polyester fiber includes the following steps:

[0030] 1) Take 70 PBT slices and place them in a blast drying oven, and dry them at 140°C for 5 hours. Take 30 parts of hyperbranched polysiloxane-coated ammonium polyphosphate flame retardant Ⅰ (AS) and PBT slices and mix them evenly. After mixing, they are fed into a twin-screw extruder for melting and blending. The temperature of each zone of the twin-screw extruder is as follows: Zone one is 245℃, zone two is 250℃, zone three is 250℃, zone four is 250℃, zone five is 250℃, main engine speed is 5.8rpm, feeder speed is 4.7rpm, and the pelletizer will extrude the melt Cut pellets to prepare PBT / AS masterbatch.

[0031] (2) Mix 20 parts of PBT / A-S masterbatch and 80 parts of PBT slices uniformly, place them in a blast drying box, and dry them at 140°C for 5 hours. After drying is completed, it is melted and extruded by a twin-screw extruder, and then enters the spinnin...

Embodiment 3

[0034] A preparation method of flame-retardant and drip-resistant polyester fiber includes the following steps:

[0035] 1) Take 70 PET slices and place them in a blast drying oven, first dry at 90°C for 2 hours, then heat up to 170°C and dry for 4 hours. Take 30 parts of hyperbranched polysiloxane coated ammonium polyphosphate flame retardant II (A-S) (chemical structural formula: ) Stir evenly with the PET chips, and then feed into the twin-screw extruder for melt blending. The temperature of each zone of the twin-screw extruder is: zone one 260℃, zone two 265℃, zone three 270℃, zone four 270℃, The fifth zone is 270°C, the main engine speed is 5.8rpm, the feeder speed is 4.7rpm, and the pelletizer cuts the extruded melt to prepare PET / AS masterbatch.

[0036] (2) Mix 30 parts of PET / A-S masterbatch and 70 parts of PET chips uniformly, place them in a blast drying oven, first dry at 90°C for 2h, then heat up to 170°C and then dry for 4h. After drying is completed, it is melted a...

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Abstract

The invention discloses a preparation method for a flame-retardant anti-dripping polyester fiber. The preparation method is characterized in that polyester chips are dried until the water content is lower than 100 ppm, a phosphorus and silicon-based flame retardant is added to the polyester chips, the mixture of the phosphorus and silicon-based flame retardant and the polyester chips is fed into adouble-screw extruder for melt blending, an extruded melt is granulated by using a granulator, and phosphorus and silicon-based flame retardant modified flame-retardant anti-dripping polyester masterbatch is obtained; the masterbatch is evenly mixed with the polyester chips, the mixture of the masterbatch and the polyester chips is dried until the water content is lower than 100 ppm, and then subjected to melt blending through the double-screw extruder, the melt enters a spinning box, is jetted through spinneret orifices and then enters a spinning channel, and after air cooling, bundling, oiling, drafting, hot setting and winding, the flame-retardant anti-dripping polyester fiber is prepared. The flame-retardant anti-dripping polyester fiber prepared by using the preparation method has excellent flame resistance, the LOI value can reach 34.1%, there is no melt dripping phenomenon during burning, and compared with a pure polyester fiber, the heat release rate and the total heat releaseare greatly reduced.

Description

Technical field [0001] The invention relates to a preparation method of flame-retardant and anti-melt dripping polyester fiber, which belongs to the field of chemical polyester fiber preparation. Background technique [0002] Polyester fibers are widely used in clothing, daily necessities, industrial products and other fields because of their high strength, good elasticity, anti-wrinkle, scalding, and corrosion resistance. However, their limiting oxygen index is low and they are flammable materials. When burning, the phenomenon of droplets is serious. The droplets with flame will not only ignite the surrounding objects and cause secondary combustion, but also cause harm to the human body, bring safety hazards to people’s lives, lives and property, which greatly limits Application range of polyester fiber. [0003] Patent CN105463610B discloses a method for preparing flame-retardant polyester fiber. It introduces unsaturated double bonds into polyester, and after the preparation of...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D01F6/92D01F1/07D01D5/088D01D5/098
CPCD01D5/088D01D5/098D01F1/07D01F6/92
Inventor 李发学彭博范硕吴德群王学利俞建勇
Owner DONGHUA UNIV
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