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Regeneration process for recycling waste spun yarn to form spinnable fiber

A waste yarn recycling and crafting technology, which is applied in fiber treatment, textile and papermaking, biochemical fiber treatment, etc., can solve the problems of poor stability, low whiteness, and no way to remove the color, so as to achieve high added value and easy utilization , high social and economic benefits

Inactive Publication Date: 2012-07-18
熊荣洪
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Among them, the damage of the reductive stripping agent to the dye hair color system of certain structures is reversible, resulting in some colors that cannot be stripped cleanly, but can only be stripped lightly, and the whiteness is low and the stability is poor after bleaching

Method used

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  • Regeneration process for recycling waste spun yarn to form spinnable fiber
  • Regeneration process for recycling waste spun yarn to form spinnable fiber

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] The basic technological process of the regeneration process in Example 1 of the present invention is: selecting classified raw materials→cleaning→desizing→cleaning→stripping→bleaching→dechlorination→cleaning→drying→opening→combing→removing impurities→becoming spinning fibers. The four main process steps of desizing, stripping, bleaching and dechlorination involved in the present invention are described in detail below.

[0019] (a) Textile waste yarn is desized after being selected and cleaned. Yarn sizing mainly uses a mixture of chemical size and starch size, and the choice of desizing agent should be determined according to the main components in the size. The composition of starch slurry in the size is relatively high, and compared with other sizes, starch slurry is more difficult to remove; for chemical size, it is easier to remove with hot water desizing and oxidative desizing. The present invention adopts amylase as the desizing agent, and the specific desizing...

Embodiment 2

[0025] The difference with embodiment 1 is only that the selection of technological parameter is different, and other does not change, specifically as follows:

[0026] In the desizing step, first add 0.6% amylase to the container by weight of textile waste yarn, then add 1.2% salt and 0.5% penetrant, heat up to 52°C, keep warm for 50 minutes, and then wash.

[0027] In the stripping step, adding concentration to the container is 80% sodium chlorite accounting for 4.5% of the textile waste yarn weight, and then adding 0.5% penetrating agent, so that the pH value of the solution reaches 3.8, and the bath ratio is 1: 6. Under room temperature conditions, start the circulation pump, and the liquid flow circulates and soaks for 4.5 hours.

[0028] In the bleaching step, adding concentration to the container is 10% sodium hypochlorite accounting for 8.5% of the weight of textile waste yarn, so that the pH value of the solution is 9, the bath ratio is 1: 6, soaked at room temperatur...

Embodiment 3

[0032] The difference with embodiment 1 and 2 is only that the selection of technological parameter is different, and other does not change, specifically as follows:

[0033] In the desizing step, first add 0.7% amylase to the container by weight of textile waste yarn, then add 1.5% salt and 0.4% penetrant to the container, raise the temperature to 53°C, keep it for 45 minutes, and then wash .

[0034] In the stripping step, adding concentration is that 80% accounts for the sodium chlorite of textile waste yarn weight 5% in container, adds the penetrating agent of 0.4% again, makes the pH value of solution 4.0, and bath ratio is 1: 8, Under room temperature conditions, start the circulation pump, and the liquid flow circulates and soaks for 4 hours.

[0035]In the bleaching step, add sodium hypochlorite with a concentration of 10% and account for 8% of the waste yarn weight in the container, so that the pH value of the solution is 9, and the bath ratio is 1:8. 60 minutes, th...

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Abstract

The invention discloses a regeneration process for recycling a waste spun yarn to form a spinnable fiber. The process comprises the following steps of: 1, desizing by using amylase as a desizing agent, wherein the amylase is in an amount which is 0.5 to 1 percent of the total weight of the yarn; 2, stripping by using an oxidizing stripping agent such as sodium chlorite as a stripping agent, wherein 80 percent sodium chlorite is in an amount which is 4 to 6 percent of the total weight of the yarn; 3, bleaching by using sodium hypochlorite as a bleaching agent, wherein 10 percent sodium hypochlorite is in an amount which is 5 to 10 percent of the total weight of the yarn; and 4, dechlorinating by mainly using sodium sulfite and sodium carbonate, wherein the sodium sulfite is in an amount which is 1 to 1.5 percent of the total weight of the yarn, and the sodium carbonate is in an amount which is 1 to 1.5 percent of the total weight of the yarn. Due to the special treatment of the waste spun yarn in the steps, the sized and dyed waste spun yarn can become the spinnable fiber with high quality and a high added value, so that social and economic benefits are improved, and environment friendliness is facilitated.

Description

technical field [0001] The invention relates to a regeneration process for recycling textile waste yarns into spinnable fibers. Background technique [0002] Spinning mills, sizing mills, weaving mills, knitting mills and other textile printing and dyeing factories produce a large amount of waste yarn every year, and these textile waste yarns are generally disposed of cheaply as scraps, or recycled through extensive simple treatment use, resulting in a huge waste. [0003] The simple recovery treatment method commonly used at present is to manually classify and select textile waste yarns first, and then adopt different treatment methods for different available waste yarns, which mainly include the following: (1) after opening and removing Miscellaneous materials become raw materials of non-woven fabrics (this is the most widely used processing method at present); (2) After cleaning, impurity removal, crushing, etc., they are used as fillers; (3) Short fibers with too short ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D06L1/14D06L3/08D06L3/06D06M11/13D06M16/00C12S11/00D06M11/54D06M11/76D06L4/23D06L4/26
Inventor 熊荣洪
Owner 熊荣洪