Preparation method of melt-drip resistant inflaming retarding polyester fiber

Abstract

The invention discloses a preparation method of melt-drip resistant inflaming retarding polyester fiber, comprising the following steps: mixing melt-drip resistant agent with a polyester slice, performing melt spanning, and processing and post-processing the mixture by alkaline solution and acid solution to form the melt-drip resistant inflaming retarding polyester fiber. The limited oxygen index of the melt-drip resistant inflaming retarding polyester fiber of the invention is 31-34, thereby melt dripping can not occur when the melt-drip resistant inflaming retarding polyester fiber burn, which can resist melt dripping effectively without releasing poisonous gas or smoke. Spinning melt-drip resistant inflaming retarding polyester fiber in accordance with routine melt spinning technology of the polyester fiber, the spanning is simple and easy to operate. The melt-drip resistant inflaming retarding polyester fiber can be directly and widely used as coatings, curtains, bedding articles, interior decoration and various special materials and the like, and has significant economic benefit and social benefit.

Description

technical field [0001] The invention relates to a preparation method of polyester fiber, in particular to a preparation method of droplet-resistant and flame-retardant polyester fiber. Background technique [0002] As the largest synthetic fiber, polyester fiber is used in a wide range of fields, such as clothing, curtains, bedding, interior decoration and various special materials. The limiting oxygen index of polyester fiber is only about 21. It is a flammable and flammable fiber, and there is a great hidden danger of fire when it is used. [0003] More importantly, polyester fibers and various products made of polyester fibers will melt and drip when burned or at high temperature, which can easily cause burns and cause larger fires. The research on falling and flame retardancy has very important practical value. [0004] At present, there are generally three types of flame retardant modification methods for polyester fibers: [0005] (1) In the stage of transesterifica...

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Problems solved by technology

Related patents such as Chinese patents CN 008004393.0, CN 02109909.X, CN 101200820A, Patent Cooperation Treaty (PCT) WO 095 / 20593, Japanese Patent Application Hei 4-364196, etc., this method has permanent flame retardancy, but this type of polyester and poly Ester fiber is a dripping type when it is flame retardant, it is easy to cause secondary fires, and its application is limited

Chinese patent CN 101139435A adds organophosphorus and organosilicon monomers in the esterification or polycondensation stage of synthetic polyester to obtain flame-retardant polyester fibers, and has certain anti-dripping properties (that is, anti-dripping properties), but the effect is not good. Ideal, and the use of this method increases the difficulty of subsequent fiber manufacturing and processing, resulting in a significant increase in fiber production costs

Chinese patent CN 101376739A obtains flame-retardant polyester by co-condensing phosphorus-containing flame retardants and polyesters. The difficulty of processing reduces the production cost, but the anti-dropping performance of the flame-retardant polyester fiber produced has not improved

The preparation process of this kind of anti-dripping agent is relatively complicated, the price is high, and the amount of addition is very small. The flame retardant is still phosphorus-containing and nitrogen-containing flame retardants.

The anti-dripping agent is difficult to disperse evenly in the resin, which has little impact on the manufacture of films or other molded products, but has a greater impact on the spinning process, such as easy breakage during spinning, and the life cycle of spinning components Shortening, etc., when the added weight fraction exceeds 2%, it is impossible to spin fibers with the desired denier

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