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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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 retard

Method used

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  • Production method of recycled phosphorus flame retardant polyester staple fibre

Examples

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Example Embodiment

[0013] Example 1: Preparation of phosphorus-based flame-retardant masterbatch. The raw material ratio is: 2-carboxyethylphenylphosphinic acid (phosphorus flame retardant) 10-12wt% and waste polyester PET bottle flakes 90-88wt%. Add waste PET PET bottle flakes into a drum dryer for 2h, then add 2-carboxyethylphenylphosphinic acid (powder), mix and continue to dry (no vacuum drying) for more than 6h, the drying temperature is 110~115 ℃, the moisture content after drying is within 0.015%, after drying, it is added to the screw extruder, melted, extruded and granulated. The temperature of the pelletizing screw is 240~275℃, the main engine speed is 50~80 rpm, the feeding speed is 80~120 kg / h, the pelletizer speed is 25~30Hz, and the masterbatch specification is Φ3.5~4.5mm.

Example Embodiment

[0014] Example 2: Put the flame-retardant masterbatch and waste PET PET bottle flakes into a vacuum drum dryer respectively, the drying temperature of the flame-retardant masterbatch is 115~125℃, and the drying temperature of waste PET PET bottle flakes is 145~ 155℃, the drying time is above 9h, and the moisture content is controlled within 0.008wt%.

Example Embodiment

[0015] Example 3: The flame-retardant masterbatch is 8-10wt% through the automatic masterbatch adding equipment and 90-92wt% of waste polyester PET bottle flakes are added to the screw extruder to melt, filter and spin to obtain a semi-finished product. Burning fiber, then post-processed, drafted, crimped and shaped, dried, cut and packaged.

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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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