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A kind of flame-retardant secondary fiber and its preparation method and application

A secondary fiber and reactor technology, applied in the field of flame retardant materials, achieves the effect of good flame retardancy, broad market prospects, and ensuring flame retardancy

Active Publication Date: 2021-06-15
嘉兴市荣晟包装材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] What the present invention will solve is the flame retardancy problem of secondary fiber (waste paper)

Method used

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  • A kind of flame-retardant secondary fiber and its preparation method and application

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] A kind of preparation method of flame-retardant secondary fiber of the present embodiment, comprises the following steps:

[0027] (1) After the domestic old corrugated box waste paper (OCC) and the American old corrugated box waste paper (AOCC) with a mass ratio of 1:0.2 are disintegrated by a hydropulper, high-concentration deslagging is carried out, and then coarse sieving and After fine screening and concentrating treatment by the concentrator, use 1 column of conical refiners and 2 sets of conical refiners to mix and refine in series to obtain secondary fiber pulp with a concentration of 3% and a beating degree of 30°SR, and store it in the pulping tank for standby;

[0028] (2) Add the secondary fiber pulp and ammonium persulfate obtained in step (1) into the reactor, heat up to 80°C and stir for 1.5h, then add melamine polyphosphate to the reactor, and continue to keep the temperature at 80°C Stir for 15h, after the reaction is over, take out the fiber, and final...

Embodiment 2

[0030] A kind of preparation method of flame-retardant secondary fiber of the present embodiment, comprises the following steps:

[0031] (1) After the domestic old corrugated box waste paper (OCC) and the American old corrugated box waste paper (AOCC) with a mass ratio of 1:0.3 are disintegrated by a hydropulper, high-concentration deslagging is carried out, and then coarse sieving and After fine screening and concentrating treatment by the concentrator, use 1 column of conical refiners and 2 sets of conical refiners to mix and refine in series to obtain secondary fiber pulp with a concentration of 4% and a beating degree of 32°SR, which is stored in the pulping tank for subsequent use;

[0032] (2) Add the secondary fiber pulp and potassium persulfate obtained in step (1) into the reactor, heat up to 80°C and stir for 1.5h, then add melamine polyphosphate to the reactor, and continue to keep the temperature at 85°C Stir for 13h, after the reaction is over, take out the fiber...

Embodiment 3

[0034] A kind of preparation method of flame-retardant secondary fiber of the present embodiment, comprises the following steps:

[0035] (1) After the domestic old corrugated box waste paper (OCC) and the American old corrugated box waste paper (AOCC) with a mass ratio of 1:0.4 are disintegrated by a hydropulper, high-concentration deslagging is carried out, and then coarse sieving and After fine screening and concentrating treatment by thickener, use 1 row of conical refiners and 2 sets of conical refiners to mix and refine in series to obtain secondary fiber pulp with a concentration of 5% and a beating degree of 30°SR, and store it in the pulping tank for standby;

[0036] (2) Add the secondary fiber pulp and ammonium persulfate obtained in step (1) into the reactor, heat up to 86°C and stir for 1 hour, then add melamine polyphosphate to the reactor, and continue stirring at a constant temperature of 86°C 15h, after the reaction is over, take out the fiber, and finally was...

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Abstract

The invention relates to a flame-retardant secondary fiber, a preparation method and application thereof, and relates to the field of flame-retardant materials. In the present invention, the secondary fiber pulp and persulfate are added into the reactor according to the ratio, heated to 80-90°C and stirred for 0.5-1.5h, then melamine polyphosphate is added to the reactor, and the temperature is continued at 80-90°C Stir at a constant temperature for 12 to 15 hours. After the reaction, take out the fibers and finally wash the pulp to obtain flame-retardant secondary fibers. In the invention, the grafting reaction between the flame retardant and the components in the secondary fiber endows the secondary fiber with a long-lasting flame-retardant effect. Moreover, the flame-retardant secondary fiber of the present invention can be used to prepare flame-retardant kraft liner boards, while ensuring the flame retardancy of the kraft liner boards, it can also improve the physical strength of the kraft liner boards. In addition, the invention has simple process and low production cost, and the waste liquid after flame retardant grafting modification can be used to prepare flame retardant surface sizing liquid without causing new environmental pollution, and the market application prospect is broad.

Description

technical field [0001] The invention relates to the field of flame retardant materials, more specifically, the invention relates to a flame retardant secondary fiber and its preparation method and application. Background technique [0002] In modern commodity trade, packaging materials play an important role in the preservation, beautification and protection of commodities, among which corrugated packaging cartons account for about 37% of the world's packaging materials. my country's corrugated box industry has achieved rapid development in recent years. In 2017, the output value of my country's corrugated box industry reached 392.473 billion yuan. With the acceleration of the upgrading of various products, zero inventory management and fast logistics have become rigid demands, which have promoted the rapid development of the corrugated box industry. The sustained and rapid development of e-commerce and other industries also supports the development of the corrugated box in...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): D21H11/14D21H17/10D21H21/34D21B1/32D21B1/34D21C5/02
CPCY02W30/64
Inventor 赵志芳沙力争顾佳燕
Owner 嘉兴市荣晟包装材料有限公司