KR102282044B1 - Process Of Producing Blended Spun Yarn Containing Waste Leather Fiber - Google Patents

Abstract

The present invention relates to a method for manufacturing a blended spun yarn containing waste leather fibers, in which the waste leather fibers are separated from waste leather and mixed with synthetic fibers, and then spun yarn is produced with a mule spinning machine, which is one of carded wool spinning machines. It is possible to knit and weave in a form of a desired fabric by manufacturing a spun yarn with excellent strength that can be knitted by using waste leather.

Description

Process Of Producing Blended Spun Yarn Containing Waste Leather Fiber

The present invention relates to a method for producing a mixed spun yarn containing waste leather fibers, in which waste leather fibers are separated from waste leather, mixed with synthetic fibers, and then spun yarns are manufactured with a mule spinning machine, which is one of the wool spinning machines.

Waste, which is emerging as one of the most serious problems facing mankind due to industrial development and increase in consumption, is not only threatening the living environment but also depleting usable resources as the amount of waste currently generated exceeds the limit of throughput. There is an urgent need to establish policies and respond to them.

For a sustainable society, it is necessary to change the mass-disposal system caused by mass production and consumption into a resource-circulating system. The core of the resource-circulating system is to reduce the generation of waste itself, and to recycle the unavoidably generated waste as much as possible. It is necessary to introduce a system that recovers energy from non-recyclable waste and finally uses it as a treatment target for stabilization.

Recently, as the standard of living increases, the demand for leather products in household goods and industrial goods such as shoes, handbags, and clothing is increasing. However, all leather product wastes and by-products are disposed of as general waste at the workplace. It is a level that is dealt with through speculation.

In this situation, while the recycling rate of textile materials is steadily increasing, in the case of leather materials, recycling hardly proceeds and the entire amount is incinerated or landfilled. It is generated at almost the same level as the amount of waste paper (26.9%) generated, and the recycling rate is also very low, about 13%, so technology development for conversion to environmentally friendly materials is urgently needed.

The environmentally hazardous leather process waste treatment method is a method to fundamentally reduce the amount of waste generated through process improvement, a method to reuse the generated waste in the process, and a method to reuse the waste for other purposes using the characteristics of the waste. There is a way to do it.

In general, wastes that are inevitably generated in the process of commercialization using natural leather or fibers among leather wastes account for about 10% of the total amount, but the current situation is that the entire amount is discarded without being recycled at all. Unlike shaving scrap, which is a waste generated in the leather manufacturing process, which is currently partially recycled, it is produced with processes such as surface PU coating post-processing and intermediate fabric synthesizing during mass production, so it can be easily converted into fibers because it maintains the shape of leather. Decomposition is not made, and in particular, in the case of leather coated on the silver surface of the leather, since it contains problems such as the need to remove the coating film, it cannot be easily recycled and the entire amount is discarded.

Republic of Korea Patent No. 10-2034218 (Announced on October 18, 2019)

Therefore, according to the present invention, it is a technical task to provide an eco-friendly product capable of knitting and weaving in the form of a desired fabric by manufacturing a spun yarn having excellent strength due to good spun yarn consolidation power by utilizing waste leather that is being completely discarded.

Therefore, according to the present invention, after neutralizing the waste leather raw material, after the softening agent treatment, and after cutting the waste leather to a size of 200-250 × 200-250 mm using a Cutting Mill Machine, a hammer mill machine (Hammer) After separating the waste leather fibers by removing the silver cotton part using a mill machine), a preparation process of sorting the waste leather fibers with a length of 20 to 30 mm that can be spun,

A honta cotton process of opening the fibers by mixing any one or more of polyester fiber, nylon fiber, and rayon fiber having a length of 38 to 40 mm prepared separately from the waste leather fiber;

A carding process of supplying and carding the opened waste leather fibers and synthetic fibers to a carding machine to produce a mixed sliver;

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인치이고, 드래프트비율 1.1~1.15인 드래프트롤러로 이루어진 드래프트부를 통과시켜 연신한 후, 꼬임수 250~350T/M, 방적속도 23~25m/min로 방적하면서 코프에 권취하는 방적공정 단계 및,Roller gauge by supplying the sliver to a mule spinning machine

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A spinning process step of stretching through a draft section consisting of a draft roller having an inch and a draft ratio of 1.1 to 1.15, and then winding it in a coffe while spinning at a twist number of 250 to 350 T/M and a spinning speed of 23 to 25 m/min;

There is provided a method for producing a mixed spun yarn containing waste leather fibers, characterized in that it comprises a winding step of winding the mixed spun yarn wound around the coffe on a paper tube using a winding machine.

Hereinafter, the present invention will be described in more detail.

The manufacturing method of the mixed spun yarn containing waste leather fibers of the present invention is a method of manufacturing the spun yarn with a mule spinning machine, which is one of the wool spinning machines, after separating the waste leather fibers from the waste leather and mixing them with synthetic fibers.

The waste leather fiber, which is one of the raw materials of the mixed spun yarn of the present invention, is separated as follows. Leather raw materials are classified by color based on ease of dyeing, color uniformity, and whether or not bleaching process is applied, and collected by classifying them into gray white to be applied to light colors, black to dark colors, and colored raw materials to be applied to neutral colors. Classified as necessary for application. Leather raw materials are collected and used in the form of flaky leather, but since it is difficult to obtain fibers of an appropriate length by pulverizing raw materials in a non-flaky form, only the scraps discarded after cutting are separated and used for grinding. However, it is necessary to secure leather fibers with a fiber length of 20 to 30 mm that can be spun after grinding, rather than using all of the raw leather, so only the raw materials whose size is 200 to 250 × 200 to 250 mm are separated before being put into the grinder should use it

The waste leather for making waste leather fibers maintains acidity, and Chrome 6+ ions are cross-linked to the leather because the chrome tanning process is performed for the manufacture of leather products. Therefore, while waste leather has high strength, it is difficult to separate leather fibers therefrom. Therefore, before the pulverization process of waste leather raw materials, neutralization process conditions should be applied to neutralize acidic waste leather raw materials and remove tanned chromium.

The neutralization operation of the waste leather raw material is made by immersing in a treatment solution consisting of 5 to 10% by weight of sodium formate (HCOONa), 3 to 8% by weight of sodium hydrogen carbonate, and pure water as the balance at 40 to 60° C. for 90 to 120 minutes.

Since leather has the property of being brittle in a dry state, adequate moisture and oil are supplied to prevent shortening of the fiber length when pulverized, and softening and washing with water to minimize dust generation prevents short fibers as much as possible. In the softener treatment, the leather is put into the treatment liquid containing the softener, then treated at about 60°C for about 60 minutes, and then washed and dehydrated.

After the softening agent treatment, the waste leather raw material is cut into 200-250×200-250 mm using a Cutting Mill Machine, and after grinding, a leather fiber with a fiber length of 20-30 mm that can be spun is produced. Because it must be secured, only raw materials with a size of at least 250 mm must be separated and used before being put into the grinder.

After cutting the waste leather raw material, the silver side part is removed using a Hammer Mill Machine to separate the waste leather fibers. In general, the processed leather for use as a leather product is composed of a silver surface (grain) and an upper surface (Split). In the present invention, the part necessary for fiberization is the upper surface called Split, and the silver surface unnecessary for fiberization must be removed.

In order to loosen the dense structure of the fibrous tissue of the waste leather raw material, it is necessary to perform a beating process over a long period of time. The beating treated waste leather raw material exposes the microfibers, making it easy to separate the long fibers and the separated long fibers have a long fiber length. It becomes a level that can be spun.

In general, a cutting mill or a hammer mill is used as equipment used to grind tough fibrous raw materials such as leather. In the case of a cutting mill, it is mainly used to grind raw materials finely using a cutter, whereas the hammer mill In this case, the hammer mill is advantageous in terms of maintaining the fiber length in consideration of spinning properties because the hammer rotates by the shaft and presses and separates the material while squeezing it.

Even if the waste leather raw material is fiberized in the separation step, since waste leather fibers having a fiber length capable of spinning and waste leather fibers having a short fiber length are mixed, fibers with a fiber length of 25 to 30 mm that can be spun must be selected and applied to the spinning process There is a need to do this, so an Air Blowing Machine is used to sort waste leather fibers. If the waste leather fibers with short fiber length are not removed in advance, a large amount of dust is generated in the carding process, causing problems in workability and reducing waste leather fibers in the final product. Since the content rate is lowered, the preparation process is completed by performing a process of separating the waste leather fibers of the short fiber form and the debris that cannot be used for spinning through a separate process.

Afterwards, a honta cotton process of opening the fibers is performed by mixing any one or more of polyester fibers, nylon fibers and rayon fibers having a length of 38 to 40 mm prepared separately from the waste leather fibers.

The waste leather fiber has a staple length of 20 to 30 mm, whereas the synthetic fiber of any one or more of polyester fiber, nylon fiber, and rayon fiber is 38 to 40 mm, so that the waste leather fiber falls, fluffs, and scatters, and the carding machine Since waste leather fibers may be recognized as trash and thrown away, it is recommended that the mixing ratio of the waste leather fibers with any one or more of polyester fibers, nylon fibers and rayon fibers during the blending process is 7:3 to 5:5. desirable. In particular, any one or more of polyester fiber, nylon fiber, and rayon fiber is mixed to improve the spun yarn bonding power.

In the case of the carding process, the raw fiber (tuft) supplied from the honta-myeon process is combed in the longitudinal direction and foreign matter is removed. After passing the fiber through the upper and lower metal needles to parallelize the raw material fiber and remove the foreign matter, the web state It is made into sliver by passing a trumpet through it.

In the carding process, it is preferable to contain hair protection oil in an amount of 1 to 3% by weight of the raw material fiber. When the amount of hair protection oil is less than 1% by weight, the raw material fibers are not easily loosened, so that agglomeration and uniformity are lowered. As the weight of the fiber increases, the web sags, and defects may occur when moving to the next step in the process.

In addition, it is preferable to contain 1 to 3% by weight of the antistatic agent, but if the amount of the antistatic agent is small, the raw material fiber may be wound around the machine due to the generation of static electricity. In addition, the content of moisture is preferably 3 to 7% by weight, but if the amount of moisture is small, the raw fiber may scatter, and the possibility of lowering the strength increases, and when it exceeds 7% by weight, the raw fiber is heavy. The web may become sagging and difficult to separate, making it difficult to spin. It is possible to suppress the generation of dust during the process and improve the spinning ability by supplying moisture through the humidification facility.

Then, through sliver doubling, etc., the uniformity is improved and the fiber mixing is made uniform to improve the physical properties.

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인치이고, 드래프트비율 1.1~1.15인 드래프트롤러로 이루어진 드래프트부를 통과시켜 연신한 후, 꼬임수 250~350T/M, 방적속도 23~25m/min로 방적하면서 코프에 권취하는 방적공정 을 행하게 된다.The sliver prepared in this way is supplied to a mule spinning machine and a roller gauge

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After stretching through a draft part made up of a draft roller with a draft ratio of 1.1 to 1.15 inches, the spinning process is performed while spinning at a number of twists of 250 to 350 T/M and a spinning speed of 23 to 25 m/min and winding it up on a coffe.

The draft ratio is a process factor that is related to the length of the raw material, and when the length of the raw fiber is very short, such as a leather raw material, if the draft ratio is greater than 1.15, the rate of yarn breakage may tend to increase.

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인치수준으로 하는데 반해, 본 발명의 폐가죽섬유-합성섬유 복합슬라이버의 경우에는 롤러게이지를

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인치로 하여야 최적의 방적성을 나타낸다. 게이지가 증가할수록 그 생산되는 최종 실의 굵기가 굵어지는데, 폐가죽 섬유가 양모보다 균제도가 낮기 때문이다.In general, when spinning wool yarn, use a roller gauge.

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In contrast to the inch level, in the case of the waste leather fiber-synthetic fiber composite sliver of the present invention, the roller gauge is

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It should be in inches for optimal spinning properties. As the gauge increases, the thickness of the final yarn produced becomes thicker, because waste leather fibers have a lower uniformity than wool.

The number of twists is preferably 250 ~ 350T/M, but if the number of twists is less than 250T/M, there is a problem that the strength of the spun yarn decreases. If it exceeds 350T/M, the spun yarn becomes excessively hard, making it difficult to form a loop during knitting. There is a problem that the knitting problem occurs.

In general, the spinning speed during wool spinning is set to 26 ~ 28 m/min, whereas in the case of the composite spun yarn of the present invention, it is preferable to set it to 23 ~ 25 m / min to prevent defective rate. Then, the mixed spun yarn wound in the cope is wound. The mixed spun yarn containing waste leather fibers of the present invention is manufactured through a winding step of winding the paper tube using a machine.

Therefore, according to the present invention, by manufacturing a spun yarn with excellent strength that can be knitted using waste leather, it is possible to achieve differentiation from the laminated type product in which the existing leather waste is combined with a binder, and the recycled leather product produced in the form of yarn is Since it is possible to knit and weave in the shape of the desired fabric, the range of its utilization is very wide. In particular, it can satisfy the demands of consumers for eco-friendly products, and has the effect of being able to differentiate into sustainable products.

1 is a photograph of a mixed spun yarn containing waste leather fibers manufactured by the present invention;
2 is a surface micrograph of a mixed spun yarn containing waste leather fibers prepared by the present invention;
3 is a cross-sectional micrograph of a mixed spun yarn containing waste leather fibers prepared by the present invention;
4 to 7 are test reports of the mixed spun yarn containing waste leather fibers manufactured by the present invention.

The following examples are non-limiting examples of manufacturing the mixed spun yarn containing waste leather fibers of the present invention.

[Example 1]

For waste leather raw materials, gray-white to be applied to light colors is classified, and only the scraps discarded after cutting are separated and used for pulverization, but only raw materials with a size of at least 250 mm or more are separated before being put into the pulverizer. In order to neutralize acidic waste leather raw materials and remove tanned chromium before the pulverization process of waste leather raw materials, the neutralization process conditions were as shown in Table 1 below.

After the neutralization treatment, a softening agent treatment was performed according to Table 2 below.

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인치, 드래프트비율 1.1~1.15인 드래프트롤러로 이루어진 드래프트부를 통과시켜 연신한 후, 꼬임수 300T/M, 방적속도 25m/min로 방적하면서 코프에 권취하는 방적공정을 행한 후, 코프에 권취된 혼합방적사를 와인딩기를 이용하여 지관에 권취하는 와인딩단계를 거쳐 Nm 7.5수의 혼합방적사를 제조한 후, 표백후 산성염료를 이용하여 염색하였다. 제조된 방적사의 물성을 측정하여 도 4 내지 도 7에 나타내었다.After the softening agent treatment, the waste leather raw material is cut to a size of 250 × 250 mm using a Cutting Mill Machine, and the silver side part is removed using a Hammer Mill Machine to produce waste leather fibers. In order to separate and select fibers with a fiber length of 20 to 30 mm that can be spun, waste leather fibers were selected using an Air Blowing Machine. After that, the waste leather fiber and the polyester fiber of 38 to 40 mm length, prepared separately, are mixed at a weight ratio of 1:1 and subjected to a honta cotton process of opening, and then supplied to a carding machine to parallelize the raw material fibers and remove impurities, It was made into a web state and made into a sliver by passing a trumpet. Compared to the input raw material, 1% by weight of hair-resistant oil, 2% by weight of an antistatic agent, and 5% by weight of moisture were added to improve spinning properties. The sliver prepared in this way is supplied to a mule spinning machine and a roller gauge

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The mixed spun yarn wound on the cope after passing through the draft section made up of a draft roller with an inch and draft ratio of 1.1 to 1.15 and stretching it, then winding it up in the cope while spinning at the number of twists of 300T/M and the spinning speed of 25m/min. A mixed spun yarn of Nm 7.5 water was prepared through a winding step of winding up the paper tube using a winding machine, and after bleaching, it was dyed with an acid dye. The physical properties of the prepared spun yarn were measured and shown in FIGS. 4 to 7 .

Claims (3)

After neutralizing the waste leather raw material by immersing it in a treatment solution consisting of 5 to 10% by weight of sodium formate (HCOONa), 3 to 8% by weight of sodium bicarbonate, and pure water as the balance, at 40 to 60°C for 90 to 120 minutes, treatment with a softener After that, the waste leather was cut to a size of 200-250 × 200-250 mm using a Cutting Mill Machine, and the silver surface was removed using a Hammer Mill Machine to separate waste leather fibers. After that, a preparation process of sorting waste leather fibers with a length of 20 to 30 mm that can be spun,
A honta cotton process of opening by mixing any one or more of polyester fiber, nylon fiber and rayon fiber having a fiber length of 38 to 40 mm prepared separately from the waste leather fiber;
A carding process of manufacturing a mixed sliver by supplying and carding to a carding machine, containing 1 to 3% by weight of antistatic oil and 1 to 3% by weight of an antistatic agent in the opened waste leather fiber and synthetic fiber,
Roller gauge by supplying the sliver to a mule spinning machine

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A spinning process step of stretching through a draft section consisting of a draft roller having an inch and a draft ratio of 1.1 to 1.15, and then winding it in a coffe while spinning at a twist number of 250 to 350 T/M and a spinning speed of 23 to 25 m/min;
A method for manufacturing a mixed spun yarn containing waste leather fibers, characterized in that it comprises a winding step of winding the mixed spun yarn wound around the coffe on a paper tube using a winding machine. delete The method of claim 1,
The mixing ratio of any one or more of polyester fiber, nylon fiber and rayon fiber and waste leather fiber during the honta cotton process is 7:3 to 5:5.

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