WO2012005411A1

WO2012005411A1 - Nonwoven fabric for cleaning and a production method for the same

Info

Publication number: WO2012005411A1
Application number: PCT/KR2010/006907
Authority: WO
Inventors: 조현
Original assignee: 주식회사 위너스코리아
Priority date: 2010-07-07
Filing date: 2010-10-08
Publication date: 2012-01-12
Also published as: KR101050831B1; US20130111685A1

Abstract

The present invention relates to a nonwoven fabric for cleaning and to a production method for the same. Provided is a nonwoven fabric for cleaning and a production method therefor, comprising: a raw-material supply step in which between 80 and 90 parts by weight of cotton fibre and between 10 and 20 parts by weight of synthetic fibre are introduced; a step in which the introduced raw materials are mixed by using a blowing and scutching machine; a step in which a web is produced in the form of a sheet by using a carding machine to process the mixed raw materials; a step in which a fibrous web is produced by layering a plurality of the webs and then spraying a water jet so as to join the plurality of webs to each other; and a heat-treatment step in which the fibrous web is subjected to hot drying, and the synthetic fibre is softened and the bond with the cotton fibre is strengthened. Also provided is a production method for the nonwoven fabric. According to the present invention, a nonwoven fabric for cleaning can be provided which maintains the water absorbency and the oil absorbency while markedly increasing the tensile strength of the cotton fibre.

Description

Nonwoven fabric for cleaning and its manufacturing method

The present invention relates to a cleaning nonwoven fabric and a method for manufacturing the same, which can be used many times by improving the tensile strength, and more particularly, a washing nonwoven fabric and a method for manufacturing the same, which significantly increase the tensile strength while maintaining absorbency and oil absorption of cotton fibers. It is about.

In general, non-woven fabric is a combination of various textile materials, such as natural, chemical, etc., produced without weaving, without a certain orientation between each other to form a web (sheet) form and then combine them by chemical or physical methods. These non-woven fabrics can be used for clothing materials such as clothing and bedding, house interiors, crop coverings, agriculture, towels, diapers, masks, gauzes, medical filters, industrial cleaners, cloths, scrubbers, mops, It can be classified as cleaning for disposable wet tissues, etc., and the nonwoven fabric for cleaning should have high absorbency and oil absorption property due to the nature of the use.

Conventionally, a method of manufacturing a nonwoven fabric for washing is a melt blown method in which a synthetic polymer is spun and made into a fiber by a high pressure, high temperature hot air to be combined into a uniform molten fiber web. In the case of fibers, there is a problem of high economical efficiency compared to natural fibers, but low oil absorption and water absorption. As another conventional technique, the base material for the production of spunlace nonwoven fabric composed of only natural fibers has low strength and low friction resistance, thereby improving its solution. However, a method of improving the strength and friction resistance by attaching a binder resin on one or both sides of the fiber web has been proposed. However, in the conventional method, too much binder resin is attached to the surface or both sides of the fiber web to reduce the absorbency of natural fibers. There is a problem.

In addition, even when using non-woven fabrics made of pure cotton fibers, which are natural fibers, to make cloths or rags, the tensile strength is significantly lower than that of synthetic fibers, which cannot be washed several times. .

On the other hand, [Republic of Korea Patent Publication] 1999-0031474 (1999.05.06) relates to the mixing of low-melting fibers in natural fiber yarns, and to manufacturing the nonwoven fabric by the carding process, molding process and shearing process, but the bonding force between fibers in the molding process In order to ensure high temperature heat treatment, the flexibility or drape property for washing cloths, mops, etc. is inferior, and the needle punching process has a problem that the fabric surface state and tensile strength are not sufficient for cleaning. As another method, in order to enhance the binding strength of natural fibers, a binder prepared using polyvinyl alcohol or the like is separately prepared and supplied to natural fibers, so that the oil desorption rate to the fibers is high, so the color sharpness is poor in dyeing and washing with water. If the dehydration process is repeated, there is still a problem that the tensile strength is insufficient.

As another conventional technique, a method of manufacturing a spunlace manufacturing substrate by stacking a natural pulp, a natural pulp web and a spunbond web made of long fibers, a meltblown, a scrim substrate, or a knitted fabric substrate, and then bonding them in a water spray method is also proposed. However, the method has a problem that the process is complicated.

Accordingly, the present invention has been made to solve the above problems, it is an object of the present invention to provide a nonwoven fabric for washing excellent in oil absorption and absorption and a method of manufacturing the same.

In addition, it is an object of the present invention to improve the tensile strength of the nonwoven fabric to be washed several times, and to provide a non-washing non-woven fabric and a method for producing the same, which produces less lint.

In addition, an object of the present invention is to provide a cleaning nonwoven fabric having improved flexibility or drape property and a method of manufacturing the same.

In addition, an object of the present invention is to provide a nonwoven fabric for cleaning and a method of manufacturing the same, which is easy to continuous production and simple manufacturing process.

In order to achieve the above object, a nonwoven fabric for washing and a method for manufacturing the same according to the present invention include a raw material supplying step of adding 80 to 90 parts by weight of cotton fiber and 10 to 20 parts by weight of synthetic fiber; Mixing the injected raw material with a blender; Processing the mixed raw material with a carding machine to produce a sheet-shaped web; Manufacturing a fibrous web by laminating a plurality of webs and then spraying a water jet to bond a plurality of webs to each other; And thermally drying the fibrous web and softening the synthetic fibers to strengthen the bond with the cotton fibers.

In addition, the nonwoven fabric for washing of the present invention and the method for producing the synthetic fiber is characterized in that the polyolefin fiber or polyester fiber having a melting point of 100 ~ 120 ℃.

In addition, in the washing nonwoven fabric of the present invention and the method of manufacturing the raw material supply step is characterized in that the cotton fiber and the synthetic fiber are alternately laminated to form at least three stages are supplied.

In addition, in the nonwoven fabric for cleaning of the present invention and the manufacturing method thereof, the heat treatment step is characterized in that the fiber web is carried out at 80 ~ 100 ℃ for 50 ~ 120 seconds by a hot air device and / or heating roll.

In addition, the cleaning nonwoven fabric of the present invention is characterized in that it is produced by the above production method.

According to the nonwoven fabric for cleaning and the manufacturing method according to the present invention as described above has the effect of improving the absorption and oil absorption of the nonwoven fabric for cleaning.

In addition, according to the nonwoven fabric for cleaning and the method for manufacturing the same according to the present invention, the tensile strength is greatly improved, and there is an effect that can be sucked several times.

In addition, according to the cleaning nonwoven fabric and the manufacturing method according to the present invention has the effect of improving the flexibility or drape.

In addition, according to the present invention, the nonwoven fabric for cleaning and the method for manufacturing the same do not need to additionally supply other raw materials or binders.

1 is a process chart of the manufacturing method of the nonwoven fabric for cleaning according to the present invention.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings.

1 is a process chart of the manufacturing method of the nonwoven fabric for cleaning according to the present invention, as shown in the manufacturing method of the nonwoven fabric for cleaning the raw material supply step of adding 80 to 90 parts by weight of cotton fiber and 10 to 20 parts by weight of synthetic fiber (S11); Mixing the injected raw material with a blender (S21); Processing the mixed raw material with a carding machine to produce a sheet-shaped web (S31); Manufacturing a fibrous web by laminating a plurality of webs and then spraying a water jet to combine a plurality of webs with each other (S41); And heat-treating the fibrous web and simultaneously softening the synthetic fibers to strengthen bonding with the cotton fibers (S51).

Raw material supply step (S11)

As the raw material supplying step of feeding 80 to 90 parts by weight of cotton fiber and 10 to 20 parts by weight of synthetic fiber, the biggest feature of the cotton fiber is that the strength of the fiber itself is strong, especially when wet with water, and it is strong in repeated washing and absorbs well. This good one is suitable as a raw material for cleaning nonwoven fabrics.

The synthetic fiber is a polyolefin fiber or a polyester fiber having a melting point of 100 ~ 120 ℃. Polyethylene fiber, polypropylene fiber, or thermoplastic polyolefin fiber or polyester fiber having a melting point of 100 to 120 ° C. or less is mixed with cotton fiber to perform heat treatment to be described later, thereby further improving the tensile strength of the nonwoven fabric.

If the synthetic fiber is less than 10 parts by weight based on 80 to 90 parts by weight of the cotton fiber, it may not form a sufficient bonding force with the cotton fiber. If the synthetic fiber is more than 20 parts by weight, the hardness becomes large, resulting in poor drape. Drape is one of the properties of bending strength of a fabric and the like, and mainly depends on flexibility and elasticity, and is calculated in the state of hanging down when the fabric is hanged on a disc.

In the raw material supplying step, cotton fibers and synthetic fibers are alternately stacked to form three or more stages. This is to overcome the partial bonding force according to the distribution of the synthetic fibers by allowing the raw materials to be evenly mixed.

First, the moisture content and foreign matter inspection before the raw material supply, and the exact weight of each fiber is measured through the inspection using a weighting balance (Weighting Balance).

In the raw material supplying step, the cotton fibers and the synthetic fibers are alternately stacked to form three or more stages.

After 80 to 90 parts by weight of cotton fibers and 10 to 20 parts by weight of synthetic fibers are classified according to the weight ratio, each of them are alternately stacked to be three or more stages and put into a raw material supply unit. If it is less than three stages, the mixing is difficult to perform smoothly, and stacking the process into too many stages of seven or more stages complicates the process.

Raw material mixing step (S21)

The step of mixing the input raw material with the blending cotton wool is the opening process to swell the compressed and tangled fibers after the raw material supply step and the front process to remove the miscellaneous contained in the fiber and to distribute the cotton fibers and the synthetic fibers evenly distributed It refers to the blending process.

The inputted raw materials are mixed in a blending machine including a large mixer, and the like is preferably mixed for 5 to 15 minutes so that the stacked mixed raw materials are sufficiently mixed.

Step of manufacturing a web (S31)

In the step of manufacturing the sheet-like web by processing the mixed raw material with a carding machine, the mixed raw material passed through the raw material mixing step is supplied to the carding machine at a constant weight through the raw material supply device and the basis weight device, and in the carding machine Separating into fibers, remove the miscellaneous and short fibers contained in the cotton, and serves to straighten small bundles or nodes of the fiber. The carding machine consists of various rollers of different sizes and a large number of brushes attached to the rollers. As the roller rotates, the brush evenly spreads the cotton fibers and the low melting point fibers to produce a thin sheet web.

Step of producing a fibrous web (S41)

After stacking a plurality of webs and spraying a water jet to combine the plurality of webs to produce a fiber web, first, using a cross wrapper (Cross Lapper) to form the thin web into a web of appropriate thickness Fold in a suitable layer.

Next, the spunlace process is a multi-layered web is passed under the water jet injector, the water jet is also called immersion and combines cotton fibers and low-melting point fibers to form a mesh (mesh) installed under the web Reproduced on the surface of the nonwoven fabric.

The injection pressure of the water jet is suitable about 60 ~ 100bar. If it is less than 60 bar, the interfiber bonds are not sufficiently formed, and spraying more than 100 bar damages the surface of the web.

The spunlace process by spraying the water jet to form a solid bond between the web and the fiber, the pores formed by the water jet and the mesh serves to improve the absorbency and oil absorption of the nonwoven fabric.

Heat treatment step (S51)

In the heat treatment step, the fibrous web is heated at 80 to 100 ° C. for 50 to 120 seconds by a hot air device and / or a heating roll to soften the synthetic fiber to strengthen the bond with the cotton fiber.

In the heat treatment step, first, the heating roll is used to remove moisture remaining in the fibrous web to a predetermined level or less, and then passes through a drying chamber in which a hot air device is installed to evaporate the moisture remaining in the fibrous web and at the same time soften the synthetic fibers. It is preferable to press with a heating roll.

In addition, the operating temperature of the heating roll and the hot air device is controlled to 80 ~ 100 ℃ lower than the temperature at which the melting of the synthetic fiber to suppress the increase in hardness due to melting and cooling of the synthetic fiber, excellent drape as a cleaning nonwoven fabric (drape) To provide In addition, through the multi-stage heat treatment, it is possible to improve the production speed of high-quality nonwoven fabric as well as bonding force between cotton fibers and synthetic fibers.

In addition, it is possible to manufacture a nonwoven fabric that can be used several times by significantly increasing the bonding strength of the fiber web prepared by using the water jet by thermal fusion of synthetic fibers evenly distributed on the web.

Hereinafter, the present invention will be described in more detail with reference to Examples.

Example 1

90kg of cotton fiber and 10kg of polyester fiber (product of Samyang Co., Ltd.) with melting point of 100 ~ 120 ℃ are inspected by weighting balance, cotton fiber is divided into 18kg and polyester fiber is divided into 2.5kg evenly. It is laminated in 5 steps in order of ester fiber → cotton fiber → polyester fiber → cotton fiber and put into raw material supply part.

The raw material is mixed for 10 minutes through a blender equipped with a large mixer, the web is manufactured with a carding machine, and the fiber is subjected to a spunlace process of adjusting the cross wrapper to 120 g / m 2 and spraying the water jet at a water pressure of 90 bar. Manufacture the web. Water is removed for 30 seconds with a heating roll heated to 90 ° C, heat treated for 40 seconds with a hot air apparatus at 90 ° C, and heat-treated for 30 seconds with a heating roll heated to 90 ° C to prepare a nonwoven fabric.

Example 2

Except for the 85kg cotton fiber in Example 1 was carried out substantially the same, except that the polyester fiber 15kg melting point 100 ~ 120 ℃.

Example 3

In Example 1 was carried out substantially the same except for the 80kg cotton fiber 20kg of the polyester fiber having a melting point of 100 ~ 120 ℃.

Comparative Example 1

In Example 1, using only 100 kg of cotton fibers as a raw material was carried out substantially the same.

Comparative Example 2

In Example 1 was carried out substantially the same except for 70kg of cotton fiber 30kg of the polyester fiber having a melting point of 100 ~ 120 ℃.

Comparative Example 3

Except for 60kg of cotton fiber in the above embodiment was carried out substantially the same except that the polyester fiber 40kg having a melting point of 100 ~ 120 ℃.

Comparative Example 4

Except that the melting point of 200 ℃ or more in polyester 1 (polyester) 100kg was carried out substantially the same as the raw material.

Absorbency and oil absorption of the nonwoven fabric prepared as described above prepared a sample of 2 × 25cm and used the Birack method, the height of the sample was immersed in water or organic solvent tetrachloroethylene for 10 minutes and then sucked up Was measured and shown in Table 1 below.

Table 1

division	Example 1	Example 2	Example 3	Comparative Example 1	Comparative Example 2	Comparative Example 3	Comparative Example 4
Absorbency (mm)	85.65	82.42	78.68	88.90	63.58	54.79	10.75
Oil absorption (mm)	91.45	85.98	79.21	93.14	59.25	46.58	11.50

Analyzing Table 1, it can be seen that the non-woven fabric made of cotton fibers has the highest absorbency and oil absorption and gradually decreases as the content of polyester fibers increases. In the case of the pure cotton of Comparative Example 1, the height of the absorbed water is 88.90 mm, and in the case of including 10 to 20 parts by weight of polyester fibers of Examples 1 to 3, the reduction width is small as 85.65 mm, 82.42 mm, and 78.68 mm, In the case of Comparative Example 2 exceeding 20 parts by weight, the reduction width of 63.58 mm is increased. It can be seen that this phenomenon is the same in the oil absorption rate. When the ratio of mixing hydrophobic polyester fibers to hydrophilic cotton fibers exceeds 20 parts by weight, water or organic solvents are sucked up to a height of less than 70 mm to wash nonwoven fabric. Falls below the generally expected height.

Tensile strength in the longitudinal direction of the nonwoven fabric prepared as described above was prepared in 2 × 14 cm sample and measured according to KS K 0520 using a tensile tester (testmeter M350-500 AX, UK) is shown in Table 2 below.

TABLE 2

division	Example 1	Example 2	Example 3	Comparative Example 1	Comparative Example 2	Comparative Example 3	Comparative Example 4
Tensile strength (kgf)	5.15	5.69	6.24	4.12	6.48	6.56	4.65

In Examples 1 to 3 and Comparative Examples 2 and 3, it can be seen that the strength increases as the content of the polyester fiber increases. On the other hand, Comparative Example 1 and Comparative Example 4 has a difference in tensile strength of about 2kgf compared to Examples 1 to 3, it can be confirmed that this difference is due to the lack of bonding force by the polyester fiber. In other words, the polyester fibers act as a binder in the non-oriented structure of the cotton fibers to have a stronger tensile strength.

To summarize the above Tables 1 and 2, the nonwoven fabric for cleaning according to the present invention is significantly higher than the tensile strength of 2-3kgf of the nonwoven fabric used in the market to maintain its shape even after multiple washings and to have durability that does not tear. The effect of reducing lint is also reduced, and the absorbency and oil absorption are much higher than those of nonwoven fabrics made of only synthetic fibers.

The present invention described above is merely illustrative, and those skilled in the art will appreciate that various modifications and equivalent other embodiments are possible therefrom. Therefore, it will be understood that the present invention is not limited to the forms mentioned in the above detailed description. Therefore, the true technical protection scope of the present invention will be defined by the technical spirit of the appended claims. It is also to be understood that the present invention includes all modifications, equivalents, and substitutes within the spirit and scope of the invention as defined by the appended claims.

Claims

Raw material supply step of adding 80 to 90 parts by weight of cotton fiber and 10 to 20 parts by weight of synthetic fiber;

Mixing the injected raw material with a blender;

Processing the mixed raw material with a carding machine to produce a sheet-shaped web;

Manufacturing a fibrous web by laminating a plurality of webs and then spraying a water jet to bond a plurality of webs to each other;

Heat-drying the fibrous web and softening the synthetic fibers to strengthen bonding with the cotton fibers;

Method for producing a nonwoven fabric for cleaning comprising a.
The method of claim 1,

The synthetic fiber is a method for producing a nonwoven fabric for washing, characterized in that the polyolefin fiber or polyester fiber having a melting point of 100 ~ 120 ℃.
The method of claim 1,

The raw material supply step is a method for producing a nonwoven fabric for washing, characterized in that the cotton fibers and the synthetic fibers are alternately stacked to form at least three stages.
The method according to any one of claims 1 to 3,

The heat treatment step is a method for producing a nonwoven fabric for cleaning, characterized in that the fiber web is carried out at 80 ~ 100 ℃ for 50 ~ 120 seconds by a hot air device and / or heating roll.
A nonwoven fabric for cleaning produced by the method of any one of claims 1 to 3.
A nonwoven fabric for cleaning produced by the method of claim 4.