Production method of recycled phosphorus flame retardant polyester staple fibre

A polyester staple fiber and phosphorus-based flame retardant technology is applied in the production field of recycled polyester modified fibers, which can solve the problems of reduced flame retardant effect and unsatisfactory flame retardant effect, achieves good flame retardant effect, and has significant economic and social benefits. , the effect of environmental protection added value

Active Publication Date: 2012-10-24
广东秋盛资源股份有限公司
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  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

[0003] Chinese patent (patent application number: 200910032004 7) discloses a polytrimethylene terephthalate (PTT) added 2-carboxyethylphenylphosphine Acid preparation of flame retardant fiber and its method, pointed out in its background technology: use PET polymer to add flame retardant to make fiber, although it can be durable flame retardant, but the flame retardant will decompose in the spinning process, after fiber formation The flame retardant effect is reduced, so the flame retardant effect of the flame retardant fiber made of PET polymer is not satisfactory

Method used

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  • Production method of recycled phosphorus flame retardant polyester staple fibre

Examples

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Comparison scheme
Effect test

Embodiment 1

[0013] Example 1: Preparation of phosphorus-based flame-retardant masterbatch. The ratio of raw materials is: 10-12wt% of 2-carboxyethylphenylphosphinic acid (phosphorus flame retardant) and 90-88wt% of waste polyester PET bottle flakes. Put the waste polyester PET bottle flakes into the drum dryer and dry for 2 hours, then add 2-carboxyethylphenylphosphinic acid (powder) to mix and continue drying (without vacuum drying) for more than 6 hours, the drying temperature is 110-115 °C, after drying, the moisture content is within 0.015%, and after drying, it is added to the screw extruder, melted and extruded to granulate. The temperature of the granulation screw is 240-275°C, the speed of the main machine is 50-80 rpm, the feeding speed is 80-120 kg / hour, the speed of the granulator is 25-30Hz, and the specification of the masterbatch is Φ3.5-4.5㎜.

Embodiment 2

[0014] Example 2: Add the flame-retardant masterbatch and waste polyester PET bottle flakes into the vacuum drum dryer respectively, the drying temperature of the flame-retardant masterbatch is 115-125°C, and the drying temperature of the waste polyester PET bottle flakes is 145-145°C 155℃, the drying time is more than 9 hours, and the moisture content is controlled within 0.008wt%.

Embodiment 3

[0015] Example 3: Put 8-10wt% of flame-retardant masterbatch into automatic masterbatch adding equipment and 90-92wt% of waste polyester PET bottle flakes according to the weight ratio, and add the screw extruder to melt, filter, and spin to prepare semi-finished flame-retardant Burning fiber, and then post-processing drafting, crimping and setting, drying, cutting and packaging.

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Abstract

The invention relates to a production method of recycled phosphorus flame retardant polyester staple fibre. Conventionally, waste PET (Polyethylene Terephthalate) bottle chips are adopted, and phosphorus flame retardant agent and the waste PET bottle chips are mixed, melted and modified to produce flame retardant master batches. At the basis of conventional spinning conditions, the technical difficulties that the thermal stability of the phosphorus flame retardant agent is poor, and due to the acidity of the phosphuret, the viscosity can be reduced in the spinning process, the spinning property is poor and defects are more can be solved though the optimization process. The production method provided by the invention includes the following steps of: firstly mixing phosphorus flame retardant agent 2-carboxyethyl-phenyl phosphinic acid and waste PET bottle chips at weight ratio of 10-12:8-90, and the melting, extruding and pelleting in a screw extruder to prepare the phosphorus flame retardant master batches; and secondly mixing the phosphorus flame retardant master batches and the waste PET bottle chips at weight ratio of 8-10:90-92 and then melt spinning. In such a way, the recycled phosphorus flame retardant polyester staple fibre with the index of flame retardant oxygen reaching above 30% can be obtained.

Description

technical field [0001] The invention belongs to the technical field of production of regenerated polyester modified fibers, and in particular relates to a method for producing regenerated phosphorus-based flame-retardant polyester staple fibers from waste polyester PET bottle flakes by adding a flame retardant. Background technique [0002] There are many flame-retardant polyester fibers currently produced, but they can be summarized into two types: one is the surface finishing method, and its production method is relatively simple. Dried to shape. Because the flame retardant is adsorbed on the surface of the fiber, there is no flame retardant component in the internal molecular structure. Therefore, in the textile processing process, due to mechanical friction or repeated washing of the fabric, the flame retardant performance almost disappears and cannot reach permanent Flame retardant effect. The other is the copolymerization modification method, which is to introduce fl...

Claims

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Application Information

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IPC IPC(8): D01F6/92D01F1/07
Inventor 马俊滨张开友付文虎
Owner 广东秋盛资源股份有限公司
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