KR101479747B1 - The method for promoting abrasion-durability of surface of nano fiber membrane using paper coated with silicon - Google Patents

Abstract

The present invention relates to a method for enhancing the surface abrasion resistance of a nanofiber membrane in a two-layer textile of a textile-nanofiber membrane, the method comprising the steps of: preparing a silicone paper coated with a silicone release layer on a non- Applying a polyurethane reactive resin having 100% solids content on the silicon paper in a patterned and amorphous pattern; Pressing and bonding the resin coated on the silicone paper through a driving roller while directly transferring the resin coated on the separately prepared nanofiber membrane layer; Aging the adhered wound resin for 20 to 30 hours; And separating the silicone paper from the product after the pressing and bonding are completed. The present invention also provides a method of enhancing surface abrasion resistance of a nanofiber membrane using the silicone paper.

Description

[0001] The present invention relates to a method for enhancing surface abrasion resistance of a nanofiber membrane using a silicone paper,

The present invention relates to a method for enhancing the surface abrasion resistance of a nanofiber membrane laminated to a textile. More particularly, the present invention relates to a method for minimizing damage of a nanofiber membrane by external physical impact, The present invention relates to a method for enhancing the surface wear resistance of a nanofiber membrane using a silicone paper.

Textiles (fibers) are required to provide functionalities in various ways, from the modification of raw polymer materials to the post-processing of fabrics. The function to be imparted depends on various factors that are frequently encountered in everyday life such as water, heat, light, electric smell, bacteria, medicines, etc. When water is used as an example, water resistance (water resistance, water repellency, water resistance), moisture permeability, , Hygroscopicity, warmth, quick drying, and so on. These functions are imparted to the fibers singly or in combination, and some of them may require the function of mutually contradictory properties such as waterproofness-moisture permeability.

In order to impart functionality to the textile product, the textile material itself is used as a high-performance fiber, or various composite methods are used. Complexification is a method for imparting added value. As a technology that is attracting particular attention in textile products, there are two or more kinds of elements, which are combinations of different kinds of fibers, different types of composites, and hybridization of different materials .

In recent years, attention has been paid to the production of nanofibers by electrospinning, which involves applying a polymer solution and a high voltage to the molten polymer to collect a fiber and a particle, To form nanofibers and particles by forming an electrostatic force therebetween. In this case, when the electrostatic force is equal to the surface tension of the polymer solution, the charged polymer solution is formed at the tip portion. If the voltage higher than the surface tension of the polymer is applied, the charged polymer droplet is not stabilized, (jet form). At this time, as the jet passes through the air, the solvent is volatilized, and as the charge is concentrated on the surface, the charge is repulsively generated to make the fiber smaller. The reason for the tapering of the fiber is that the jet tapers due to elongation and spray of the jet during the movement to the dust collecting plate. As a result, the dispersed polymer solution can be focused on the collector in the form of fibers and particles to form a web.

Meanwhile, a method of laminating the produced nanofibers with other heterogeneous textiles (fibers), a method of coating nanofibers with different types of textiles in the production of nanofibers, a method of separately producing nanofibers and bonding them to different types of textiles There is a way. The bonded textile is a two-layer functional textile of a textile-nanofiber membrane. These two-layer textile products have the advantage of maximizing the advantages and functionality of the nanomembrane itself, and are light and soft.

However, since the nanofiber itself is weak, scratches are easily generated, the strength of the nanofiber is weak, and the functionality is liable to be impaired, and slipperiness required for sewing is insufficient, so that a separate lining is required for sewing.

Accordingly, the present invention provides a method for enhancing the surface wear resistance of the nonwoven fabric laminated nanofibers as shown in FIGS. 1 and 2 and improving the water pressure resistance without significantly lowering the moisture permeability. In detail, it can be seen as a method of surface treatment of the nanofiber membrane itself and a method of modifying the surface of the nanofiber membrane laminated to the textile. It is possible to prevent the damage of the nanofiber membrane by external physical impact, To provide a way to make it possible. Unlike a general membrane, which has a uniform thickness without pores, a nonwoven membrane-type membrane in which nanofibers are laminated is composed of a fibrous body having a thickness of several hundred nanometers (nm). Therefore, the membrane is vulnerable to external forces Have. Most researchers have focused on improving the abrasion resistance of the membrane itself in order to improve these vulnerability characteristics, and have studied the hybrid shape of the membrane itself by changing the material itself or by applying various materials in combination.

In the present invention, it is intended to improve the above-mentioned vulnerability by surface treatment without changing the material of the membrane itself.

As a surface treatment processing method, the present applicant has developed an invention relating to a surface treatment of a nano-membrane using a paper coated with silicon to use a transfer method.

The first object of the present invention is to maximize the advantages of the 2-layer textile of the textile-nanofiber membrane, to provide a slipperiness of the surface of the nanofiber membrane while preventing the deterioration of functionality due to damage of the nanofiber membrane, The present invention also provides a method for enhancing the surface wear resistance of a nanofiber membrane using a silicone paper which can be used without being used and imparted with aesthetic effect by applying various patterns.

Another object of the present invention is to provide a two-layer textile of a textile-nano-fiber membrane, which can improve the physical strength of the nano-fiber membrane and improve the water- And a method of enhancing the surface wear resistance of a fiber membrane.

According to a preferred embodiment of the present invention, there is provided a method for enhancing the surface abrasion resistance of a nanofiber membrane in a two-layer textile of a textile-nanofiber membrane, comprising the steps of: Preparing a silicone paper; Applying a polyurethane reactive resin having 100% solids content on the silicon paper in a patterned and amorphous pattern; Pressing and bonding the resin coated on the silicone paper through a driving roller while directly transferring the resin coated on the separately prepared nanofiber membrane layer; Aging the adhered wound resin for 20 to 30 hours; And separating the silicone paper from the product after the pressing and bonding is completed. The present invention also provides a method of enhancing the surface wear resistance of a nanofiber membrane using the silicone paper.

According to one embodiment of the present invention, the polyurethane reaction resin is applied on the silicone paper in an amount of heat of 80 to 200 캜 and an amount of 1 to 30 g / m 2, and the drive roller is preferably a calendar roller and a rubber roller.

When the surface of the nanofiber membrane is subjected to the surface treatment according to the present invention, it is possible to reduce the occurrence of the process loss by using the method described above, to prevent the damage of the nanofiber membrane, to achieve an environmentally friendly and compact process There is an advantage to be able to.

In addition, the slip property can be imparted through such treatment to improve workability and productivity when sewing clothes. Even if a separate lining is not used, it is possible to maintain a more comfortable state because it does not give a sticky or stiff feeling when touching directly to the skin.

Also important is that the surface function of the nanofiber membrane does not degrade or enhance its original function, and it also provides endurance functionality through its protection.

FIG. 1 is a SEM photograph of a surface of a nano-web membrane used in the manufacture of a textile-nano-web membrane 2-layer textile.
2 is a cross-sectional SEM photograph of a textile-nano web membrane 2-layer textile.
Figure 3 is a sample of a product that has been processed into a regular pattern on the membrane surface of a textile-nano web membrane 2-layer textile.
Figure 4 is an example of a sample of a product that has been processed into an amorphous pattern on the membrane surface of a textile-nano web membrane 2-layer textile.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, the present invention will be described in detail. In the following description of the present invention, a detailed description of related art or well-known structures will be omitted so as not to obscure the gist of the present invention.

The present invention modifies the surface of a nanofiber membrane laminated to a textile, and will generally be a method for protecting the nanofiber membrane in the two-layer of a textile-nanofiber membrane.

Here, the textile includes both fabrics and knitted fabrics. In the case of fabrics, all fabrics woven with natural fibers and synthetic fibers are possible. In the case of knitted fabrics, both warp and weft yarns are selectable. The nanofiber membrane layer of the present invention refers to a nonwoven fabric in the form of nanofiber web composed of ultrafine fibers made by electrospinning.

The formation of two-layers of textile-nanofiber membranes is possible in a variety of ways.

In other words, it is possible through various methods of coating by spinning directly onto the textile in the electrospinning process.

Korean Patent Application No. 2005-0104704 and Korean Patent No. 0658499 disclose a method of directly coating nanofibers on a textile to form the nanofibers, and since similar methods are well known, The contents are omitted. There is also a method in which nanofibers are separately produced by electrospinning, and the nanofibers are formed into a film form and bonded to the textile using an adhesive. Illustratively, such a method will be briefly described.

Textile and nanofiber membranes are bonded using a polyurethane adhesive or a polyacrylic adhesive. The most widely used form is a polyurethane resin, which is used together with a crosslinking agent, a crosslinking accelerator and a diluting solvent. For example, a polyurethane resin is coated on a textile using a gravure roller, and the solvent is evaporated. Then, the nanofiber membranes wound on the other winding rolls are laminated and pressed and bonded.

When the nanofiber membrane laminated on the textile is used as it is, the above-mentioned problems arise. Accordingly, the present invention aims to protect the nanofiber membrane by protecting the membrane and to maximize the advantages of the two-layer membrane.

The present invention relates to a method of enhancing surface abrasion resistance of a nanofiber membrane laminated to a textile. More particularly, the present invention relates to a method for minimizing damage of a nanofiber membrane due to external physical impact, The present invention relates to a method for enhancing the surface wear resistance of a nanofiber membrane using a silicone paper.

According to the present invention, a polyurethane reactive resin composed of 100% solids is first prepared by using a substrate such as silicone paper (also referred to as a release paper) or polyethylene (PE) coated with a silicone release layer on a paper of a nonwoven fabric, It dissolves by applying heat at 200 ℃. And this is applied to the silicone paper in an amount of 1 to 30 g / m 2.

The important point here is that the resin component is applied to a silicone paper without using a method of directly applying the resin component to the nanofiber membrane, and it is applied in a patterned form of a regular irregular shape at the time of application. If the applied amount is too small, it is difficult to form a sufficient film to protect the membrane. If too much amount is applied, the nanofiber membrane itself having a simple two-layer structure It is difficult to take advantage of the benefits and functionality. In general, the composition and amount of resin to be applied can be adjusted differently depending on the intended use and purpose of the final product, the characteristics of the textile after finishing, weight, texture, and the desired functionality level.

On the other hand, in the present invention, a thermoplastic polyurethane resin is preferable as described above, but a thermosetting polyurethane resin using other thermoplastic resin and a solvent may be used, and such contents are also within the scope of the present invention.

Next, the resin coated on the silicon paper is directly transferred to the nanofiber membrane layer. After transferring, the sheet is passed through a driving roller to press and bond. The drive roller is preferably a calendar roller and a rubber roller. After compression and adhesion, the silicone paper is separated from the product. At this time, depending on the component of the coating resin, the silicone paper is peeled immediately or peeled after curing for a long time, preferably 20 to 30 hours. The surface treatment of the nanofiber membrane is completed without a separate drying process. Such a transferring process can be fully understood at the level of those skilled in the art and a detailed description is omitted.

In the case of the present invention, when the resin is directly applied to the nanofiber membrane, damage to the membrane may be caused. Therefore, damage to the nanofiber membrane due to chemistry and heat Layer separation, functional deterioration, etc.) can be minimized. When the indirect coating method is used, it is possible to reduce the occurrence of a process loss, and it is possible to achieve a compact process.

Meanwhile, slip property is imparted through such treatment to improve workability and productivity when sewing clothes, and even when a separate lining is not used, it is possible to maintain a more comfortable state because it does not give a sticky or slimy feel when it comes in direct contact with the skin. In addition, the resin-coated textile-nano web membrane 2-layer textile is characterized in that water permeability and moisture permeability are not significantly deteriorated while water pressure and slipperiness are improved as compared with a textile not coated with a resin.

Fabrication of 2-layer textile of textile - nanofiber membrane

A moisture-curable polyurethane resin having a solid content of 100% was applied on the surface of the fabric in an amount of 1 to 15 g / m < 2 >, a film of nanofiber membrane was laminated on the fabric, heated and passed through a pressure cylinder, . After laminating, the process tension pulled by the winding roller or the like was kept at 3 kgf or less. Then, the reaction was completed by aging at a temperature of 25 to 30 ° C and a relative humidity of 70% for 24 hours to prepare a laminated two-layered textile.

For the surface treatment of the two-layer textile, when the non-woven paper is processed using a silicone paper coated with a silicone release layer, a polyurethane reactive resin Coated with a gravure roll or a screen patterned in the form of a regular or irregular pattern as shown in FIG. 3 or FIG. 4, and then mixed with a membrane of a 2-layer textile of a textile-nano web membrane for 24 hours. . At this time, the resin may be a polyurethane resin of 30 to 60% solids content.

It will be apparent to those skilled in the art that various modifications and variations can be made in the present invention without departing from the spirit and scope of the present invention as defined by the appended claims. - The description of the improvement of the abrasion resistance while not greatly reducing or improving the existing properties through the processing of the membrane surface of the layer textile, and the scope of the present invention is not limited to the method described above.

Surface treatment of nanofiber membrane of 2-layer textile

The surface treatment method of the 2-layer textile of the textile-nano web membrane was treated by the method described in the above-mentioned task solution, and the appearance visual inspection was performed on the 2-layer textile product and the surface treatment product. And scratches were artificially induced. The slip resistance test was performed using the method of ASTM D 1894, the water pressure was measured by the method of ISO 0811, and the air permeability was measured by the method of JIS L 1096 standard . The results are shown in Table 1 below.

division Water pressure mmH2O Air permeability Cm3 / sec / cm < 2 > Scratches Slipperiness Exterior touch Before surface treatment 3,500 0.6 Severe weakness Clean Good After surface treatment 4,500 0.5 none good Clean Very good

As shown in Table 1, it is desirable that the air permeability is maintained at least 50% or more as compared with the pre-surface treatment level, and the water pressure is increased. The functional properties of the nanofiber membrane It can be understood that maintenance or supplementation is sufficiently performed. It also shows a strong side to scratches, and the slipperiness and touch feeling are very good. On the other hand, after the washing process, it was confirmed that the difference in the surface treatment was not significant, but when the surface treatment was not performed, the damage of the nanofiber membrane was severely damaged by washing. Therefore, it can be predicted that the nanofiber membrane is well protected when the surface treatment is performed, thereby increasing practicality.

It will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the scope of the present invention as defined by the appended claims and their equivalents. .

Claims (3)

A moisture-curing polyurethane resin having a solid content of 100% is applied on one surface of the fabric in an amount of 1 to 15 g / m < 2 >, and a film-like nanofiber membrane is laminated on the fabric, heated and passed through a pressure cylinder, A method for enhancing the surface abrasion resistance of a nanofiber membrane in a two-layer textile of a textile-nanofiber membrane after completion of the reaction by aging at a temperature of 25 to 30 DEG C and a relative humidity of 70 to 24 hours after lamination,
Preparing a silicone paper coated with a silicone release layer on a paper in the form of a nonwoven fabric;
Applying a polyurethane reactive resin having a solid content of 30 to 60% solids on the silicon paper in a patterned or amorphous pattern using a gravure roll patterned in the form of a regular or irregular pattern;
Passing the resin coated on the silicone paper directly onto a nanofiber membrane layer prepared separately, passing the resin through a driving roller, pressing and bonding;
Aging the adhered wound resin for 20 to 30 hours; And
And separating the silicone paper from the pressed and adhered product, wherein the polyurethane reactive resin is applied on the silicone paper in an amount of 1 to 30 g / m < 2 > at a temperature of 80 to 200 DEG C, Wherein the roller is a calender roller and a rubber roller. delete delete

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