KR101680533B1 - Artificial leather - Google Patents

Artificial leather Download PDF

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Publication number
KR101680533B1
KR101680533B1 KR1020110017147A KR20110017147A KR101680533B1 KR 101680533 B1 KR101680533 B1 KR 101680533B1 KR 1020110017147 A KR1020110017147 A KR 1020110017147A KR 20110017147 A KR20110017147 A KR 20110017147A KR 101680533 B1 KR101680533 B1 KR 101680533B1
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South Korea
Prior art keywords
artificial leather
flame retardant
retardant composition
preliminary
composition layer
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KR1020110017147A
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Korean (ko)
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KR20110098675A (en
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박종호
이응민
황영남
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코오롱인더스트리 주식회사
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    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06M—TREATMENT, NOT PROVIDED FOR ELSEWHERE IN CLASS D06, OF FIBRES, THREADS, YARNS, FABRICS, FEATHERS OR FIBROUS GOODS MADE FROM SUCH MATERIALS
    • D06M15/00—Treating fibres, threads, yarns, fabrics, or fibrous goods made from such materials, with macromolecular compounds; Such treatment combined with mechanical treatment
    • D06M15/19—Treating fibres, threads, yarns, fabrics, or fibrous goods made from such materials, with macromolecular compounds; Such treatment combined with mechanical treatment with synthetic macromolecular compounds
    • D06M15/37—Macromolecular compounds obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds
    • D06M15/564—Polyureas, polyurethanes or other polymers having ureide or urethane links; Precondensation products forming them
    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06M—TREATMENT, NOT PROVIDED FOR ELSEWHERE IN CLASS D06, OF FIBRES, THREADS, YARNS, FABRICS, FEATHERS OR FIBROUS GOODS MADE FROM SUCH MATERIALS
    • D06M23/00—Treatment of fibres, threads, yarns, fabrics or fibrous goods made from such materials, characterised by the process
    • D06M23/16—Processes for the non-uniform application of treating agents, e.g. one-sided treatment; Differential treatment
    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06N—WALL, FLOOR, OR LIKE COVERING MATERIALS, e.g. LINOLEUM, OILCLOTH, ARTIFICIAL LEATHER, ROOFING FELT, CONSISTING OF A FIBROUS WEB COATED WITH A LAYER OF MACROMOLECULAR MATERIAL; FLEXIBLE SHEET MATERIAL NOT OTHERWISE PROVIDED FOR
    • D06N3/00—Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof
    • D06N3/0002—Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof characterised by the substrate
    • D06N3/0004—Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof characterised by the substrate using ultra-fine two-component fibres, e.g. island/sea, or ultra-fine one component fibres (< 1 denier)
    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06N—WALL, FLOOR, OR LIKE COVERING MATERIALS, e.g. LINOLEUM, OILCLOTH, ARTIFICIAL LEATHER, ROOFING FELT, CONSISTING OF A FIBROUS WEB COATED WITH A LAYER OF MACROMOLECULAR MATERIAL; FLEXIBLE SHEET MATERIAL NOT OTHERWISE PROVIDED FOR
    • D06N3/00—Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof
    • D06N3/0056—Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof characterised by the compounding ingredients of the macro-molecular coating
    • D06N3/0063—Inorganic compounding ingredients, e.g. metals, carbon fibres, Na2CO3, metal layers; Post-treatment with inorganic compounds
    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06N—WALL, FLOOR, OR LIKE COVERING MATERIALS, e.g. LINOLEUM, OILCLOTH, ARTIFICIAL LEATHER, ROOFING FELT, CONSISTING OF A FIBROUS WEB COATED WITH A LAYER OF MACROMOLECULAR MATERIAL; FLEXIBLE SHEET MATERIAL NOT OTHERWISE PROVIDED FOR
    • D06N7/00—Flexible sheet materials not otherwise provided for, e.g. textile threads, filaments, yarns or tow, glued on macromolecular material
    • D06N7/0092—Non-continuous polymer coating on the fibrous substrate, e.g. plastic dots on fabrics
    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06M—TREATMENT, NOT PROVIDED FOR ELSEWHERE IN CLASS D06, OF FIBRES, THREADS, YARNS, FABRICS, FEATHERS OR FIBROUS GOODS MADE FROM SUCH MATERIALS
    • D06M2200/00—Functionality of the treatment composition and/or properties imparted to the textile material
    • D06M2200/30—Flame or heat resistance, fire retardancy properties
    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06N—WALL, FLOOR, OR LIKE COVERING MATERIALS, e.g. LINOLEUM, OILCLOTH, ARTIFICIAL LEATHER, ROOFING FELT, CONSISTING OF A FIBROUS WEB COATED WITH A LAYER OF MACROMOLECULAR MATERIAL; FLEXIBLE SHEET MATERIAL NOT OTHERWISE PROVIDED FOR
    • D06N2209/00—Properties of the materials
    • D06N2209/06—Properties of the materials having thermal properties
    • D06N2209/067—Flame resistant, fire resistant
    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06N—WALL, FLOOR, OR LIKE COVERING MATERIALS, e.g. LINOLEUM, OILCLOTH, ARTIFICIAL LEATHER, ROOFING FELT, CONSISTING OF A FIBROUS WEB COATED WITH A LAYER OF MACROMOLECULAR MATERIAL; FLEXIBLE SHEET MATERIAL NOT OTHERWISE PROVIDED FOR
    • D06N2209/00—Properties of the materials
    • D06N2209/12—Permeability or impermeability properties
    • D06N2209/121—Permeability to gases, adsorption
    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06N—WALL, FLOOR, OR LIKE COVERING MATERIALS, e.g. LINOLEUM, OILCLOTH, ARTIFICIAL LEATHER, ROOFING FELT, CONSISTING OF A FIBROUS WEB COATED WITH A LAYER OF MACROMOLECULAR MATERIAL; FLEXIBLE SHEET MATERIAL NOT OTHERWISE PROVIDED FOR
    • D06N2211/00—Specially adapted uses
    • D06N2211/12—Decorative or sun protection articles
    • D06N2211/28—Artificial leather

Abstract

The present invention relates to an artificial leather which has a flame retardancy level as required in the industry by partially applying a flame retardant composition on a preliminary artificial leather, and at the same time, the soft touch of the microfine fibers is not deteriorated and the breathability can be greatly improved. The artificial leather of the present invention comprises: a preliminary artificial leather comprising a nonwoven fabric made of microfine fibers and an elastic polymer resin impregnated in the nonwoven fabric; And a flame retardant composition layer formed by partially applying the flame retardant composition on the preliminary artificial leather in an area ratio of 60 to 90% of the total surface area of the preliminary artificial leather.

Description

Artificial leather {

TECHNICAL FIELD The present invention relates to an artificial leather, and more particularly, to an artificial leather including a flame retardant composition layer.

Artificial leather is made by impregnating a nonwoven fabric formed by three-dimensionally entangled microfine fibers into an elastomeric polymer, and has a soft texture and a unique appearance similar to natural leather, and therefore is used in shoes, clothes, gloves, Interior materials and the like.

Such artificial leather is required to have improved functionality in terms of flexibility, surface quality, abrasion resistance, light fastness, or elongation property depending on the intended use, and various characteristics are required at the same time.

For example, when artificial leather is applied to a skin material to be attached to an automobile seat in an automobile interior material, the quality of the surface, specifically excellent appearance, breathability, and tactile characteristics are required as the eye level of the consumer increases, There is a difficulty in satisfying the flame retardancy specified by the regulation item of the physical property items of the product.

That is, a large amount of flame retardant must be used in order to impart the flame retardancy required in the artificial leather to the artificial leather. If a large amount of the flame retardant is applied to the artificial leather, there is a problem that the artificial leather becomes hard and the breathability is deteriorated.

Accordingly, the present invention relates to an artificial leather capable of preventing problems caused by limitations and disadvantages of the related art.

That is, the present invention provides an artificial leather which has a flame retardancy level as required in the industry by partially applying the flame retardant composition on a preliminary artificial leather and at the same time, the soft touch of the microfine fibers is not deteriorated and the breathability can be greatly improved The purpose.

In order to accomplish the above object, the present invention provides a pre-artificial leather comprising a nonwoven fabric made of ultrafine fibers and an elastic polymer resin impregnated in the nonwoven fabric; And a layer of a flame retardant composition formed by partially applying a flame retardant composition on the preliminary artificial leather in an area ratio of 60 to 90% of the total surface area of the preliminary artificial leather.

The present invention has the following effects.

First, since the artificial leather according to the present invention has a partially applied flame retardant composition layer in an optimal shape and content, it has an effect of not only having flame retardancy as required in the industry but also improving the economical efficiency.

Secondly, the artificial leather according to the present invention can have excellent tactile feel and breathability as the flame retardant composition layer is partially coated.

Such an artificial leather can be used for an automobile seat which requires excellent flame retardancy, appearance and touch.

1 is a plan view of an artificial leather according to an embodiment of the present invention.
2 is a cross-sectional view of the artificial leather according to line AA 'in FIG.
3 to 5 are plan views of artificial leather according to another embodiment of the present invention.

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 invention. Therefore, the present invention encompasses all changes and modifications that come within the scope of the invention as defined in the appended claims and equivalents thereof.

As used herein, the term &quot; preliminary artificial leather &quot; means an artificial leather including a nonwoven fabric and an elastic polymer resin impregnated on the nonwoven fabric, and means an artificial leather just before the flame retardant composition is added.

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

1 is a plan view of an artificial leather according to an embodiment of the present invention.

2 is a sectional view of the artificial leather according to the line A-A 'in Fig.

As shown in FIGS. 1 and 2, the artificial leather of the present invention includes a preliminary artificial leather 30 and a flame retardant composition layer 10 formed by partially applying a flame retardant composition thereon. According to one embodiment of the present invention illustrated in Figures 1 and 2, since the flame retardant composition is only partially applied on the preliminary artificial leather 30, it is possible to cope with the non-application region of the preliminary artificial leather to which the flame retardant composition is not applied As a result, the artificial leather of the present invention can have excellent air permeability without deteriorating the feel of the preliminary artificial leather made of microfine fibers.

Further, since the flame retardant composition is only partially applied on the preliminary artificial leather 30, the amount of the flame retardant composition to be used can be greatly reduced. As a result, it is possible to improve the economical efficiency by lowering the production cost of the artificial leather.

On the other hand, when the flame-retardant composition is applied on the entire surface of the preliminary artificial leather 30 as in the prior art, the flame-retardant composition is used in a large amount, resulting in poor economical efficiency and deteriorating tactile feel and breathability of the artificial leather.

The artificial leather of the present invention has a flame retardant composition layer 10 formed by partially applying a flame retardant composition in an area ratio of 60 to 90% of the total surface area of the preliminary artificial leather 30. If the ratio of the area occupied by the flame retardant composition layer 10 is less than 60%, it is impossible to obtain an artificial leather having a flame retardancy that is required in the industry, whereas if the area ratio of the flame retardant composition layer 10 exceeds 90% The ventilation of the artificial leather may drop sharply.

The flame retardant composition layer 10 may have various forms as shown in Figs. 1 and 3 to 5.

For example, as shown in Fig. 5, the flame retardant composition layer 10 may be composed of a plurality of discontinuous unit layers having a predetermined shape. That is, a plurality of unit layers constituting the flame retardant composition layer 10 are discontinuously distributed on the preliminary artificial leather 30, and one groove 20 corresponding to the non-application region of the preliminary artificial leather 30 And may be formed to surround the plurality of unit layers.

However, when one groove 20 surrounding a plurality of unit layers distributed discontinuously is formed, the non-applied region of the preliminary artificial leather 30 can be easily burned along the continuously formed groove 20 The flame retardancy of artificial leather may be somewhat lowered. As a result, a relatively large amount of flame retardant must be used in order to impart a level of flame retardancy required by the industry to the artificial leather, and the breathability and feel of the artificial leather may be somewhat lowered.

On the other hand, as exemplified in Figs. 1, 3 and 4, the artificial leather of the present invention has a large number of discontinuously distributed, non-coated areas corresponding to the non- Grooves 20 may be provided.

The flame retardant composition layer 10 of the present invention may be one body surrounding the plurality of grooves 20 as illustrated in FIGS. Alternatively, as illustrated in FIG. 4, the flame retardant composition layer 10 of the present invention may be comprised of a plurality of unit layers distributed discontinuously.

When the flame resistance test is performed on an artificial leather having a plurality of grooves 20 distributed discontinuously corresponding to the non-applied regions of the preliminary artificial leather 30 to which the flame retardant composition is not applied, the plurality of grooves 20 Is distributed discontinuously, it is possible to prevent the flame from spreading to the entire non-application region of the preliminary artificial leather (30). As a result, even if the amount of application of the flame retardant composition is reduced, the flame retardancy of the artificial leather can be greatly improved.

Therefore, when the same amount of the flame retardant composition is applied to the preliminary artificial leather 30, the artificial leather having the plurality of discontinuously distributed grooves 20 is formed by the artificial leather having only one continuous groove 20 It has an excellent flame retardancy.

The plurality of grooves 20 of the inventive artificial leather may be distributed irregularly and discontinuously, as shown in FIG. 6, and the flame retardant composition layer 10 may have a plurality of grooves 20 Lt; / RTI &gt;

Each of the plurality of grooves 20 of the artificial leather of the present invention may have various shapes, for example, circular, polygonal, or line shapes.

On the other hand, in order to improve both the flame retardancy and the breathability, the flame retardant composition layer 10 should have an optimum penetration depth and an upper thickness. FIG. 2 is a cross-sectional view of the artificial leather according to an embodiment of the present invention, taken along line A-A 'of FIG. 1. As shown in FIG. 2, the artificial leather has a flame retardant composition layer 10, An upper thickness of the flame retardant composition layer 10 indicating the extent to which the flame retardant composition layer 10 is drawn onto the surface and an infiltration depth indicating a degree of penetration of the flame retardant composition layer 10 into the preliminary artificial leather 30.

(A) is the thickness (c) of the preliminary artificial leather 30, and the upper thickness (a) is the thickness of the preliminary artificial leather 30, in order to produce artificial leather having flame retardancy of not more than 100 mm / minute in horizontal burning rate and air permeability of 20 to 50 L / It is preferable that the ratio is in the range of 0.1 to 4%. If the ratio of the upper thickness (a) to the upper thickness (a) is less than 0.1%, it is impossible to produce artificial leather having a flame retardancy that is required by the industry. If the ratio of the upper thickness The touch feeling of the user can be rapidly reduced.

It is preferable that the penetration depth b is in a range of 5 to 50% of the thickness c of the preliminary artificial leather 30. If the penetration depth (b) ratio is less than 5%, the adhesive strength is lowered and the durability is lowered. On the other hand, if the penetration depth (b) ratio exceeds 50%, the skin feel of the artificial leather can be hardened.

The upper thickness (a) and penetration depth (b) of the flame retardant composition layer 10 can be measured by photographing the cross section of the sample with a scanning electron microscope (SEM).

The flame retardant composition may include a flame retardant and a binder. As the flame retardant, it may be preferable to use a phosphorus flame retardant agent rather than a halogen-based flame retardant agent that is a carcinogen. The binder is for improving the adhesive strength, and various kinds of binders can be used. Particularly, since the urethane binder containing silicon contains silicone, it is excellent in heat resistance and can suppress the decomposition of silicon upon combustion and can form crosslinking with urethane, so that the flame retardancy of the artificial leather can be improved. On the other hand, the urethane binder has a strong adhesive force with the preliminary artificial leather (30), and has an advantage of having good adhesion to other materials such as sponge.

The flame retardant composition may contain various additives in addition to the flame retardant and the binder described above. Examples of the additives include antioxidants, antistatic agents, ultraviolet absorbers, hydrolysis inhibitors, and softening agents.

As described above, the preliminary artificial leather 30 is an artificial leather including a nonwoven fabric (not shown) and an elastic polymer resin (not shown) impregnated in the nonwoven fabric. The preliminary artificial leather 30 means an artificial leather immediately before the flame- , Can be prepared by the method described below.

First, sea-island type fibers are produced through a composite spinning process. The component of the sea-island type fibers may be nylon or polyester, and the polyester may be polyethylene terephthalate (PET), polytrimethylene terephthalate (PTT) or polybutylene terephthalate (PBT).

Next, the sea-island fibers are formed into a short fiber shape such as staple fibers through a cutting process. The sea-island fibers in the form of short fibers are subjected to a carding process and a cross lapping process to form a web. Alternatively, a web may be formed directly by a spun bonding process using a sea-island fiber in the form of a long fiber without a cutting process.

The plurality of webs thus formed are bonded to each other by using a needle punch or a water jet punch to complete the nonwoven fabric.

Next, the preliminary artificial leather (30) is completed by sequentially performing the step of impregnating the nonwoven fabric with the elastic polymer resin and the microfabricating step of removing the sea component from the sea-island fibers. Alternatively, the microfabrication process may be performed first, followed by the impregnation process of the elastic polymer resin.

The process of impregnating the nonwoven fabric with the elastic polymer resin may be performed by a coating process or a dipping process, and a simple and easy dipping process will be described in detail as follows.

First, a polyurethane resin or a silicone resin may be used as the elastic polymer resin. As the polyurethane resin, a polycarbonate diol resin, a polyester diol resin or a polyether diol resin alone or a mixture thereof may be used.

The step of immersing the nonwoven fabric in the composition including the elastic polymer resin, the coagulation step of solidifying the elastic polymer resin in the coagulation bath, and the step of washing in the water bath are sequentially performed to complete the impregnation process of the elastic polymer resin . The coagulating solution contained in the coagulation bath may be a mixed solution containing water and dimethylformamide.

More specifically explaining the microfabrication process, an alkali solution such as a caustic soda aqueous solution is used to elute and remove the above-mentioned sea component from the conjugate fiber composed of a cast component and a sea component. By removing the sea component, the residual islands become microfine fibers. The microfine fibers produced by the microfine fiber step may have a fineness of 0.3 denier or less on the tactile surface.

Although the method of producing the preliminary artificial leather 30 using the sea-island fiber has been described above, the present invention is not limited to this. The microfibers may be manufactured from the beginning and the nonwoven fabric may be manufactured using the microfibers, The preliminary artificial leather 30 may be produced by impregnating an elastic polymer resin.

The artificial leather as described above has excellent flame retardancy and excellent air permeability. That is, the horizontal burning speed of the artificial leather measured according to the FMVSS.No.302 automobile interior material burning test specification is 100 mm / minute or less, and the ventilation of the artificial leather is in the range of 20 to 50 L / minute / .

The horizontal burning speed is a method of measuring flame retardancy, which is a method of measuring mainly when artificial leather is used as an interior material of automobile seat or the like. If the horizontal burning speed of the artificial leather exceeds 100 mm / minute, it can not have the flame retardancy level required in the industry, and thus it may be difficult to use it as an automobile interior material.

The air permeability of the artificial leather indicates the degree of passage of air into and out of the automobile seat when artificial leather is used for the automobile seat. The driver feels comfortable as the air permeability increases, while the driver feels uncomfortable as the air permeability decreases. However, when the air permeability is excessively increased, the flame retardancy of the artificial leather is excessively decreased as the content of the flame retardant composition layer 10 is decreased. Therefore, it is preferable that the air permeability of the artificial leather has a range of 20 to 50 L / min / 100 cm 2.

Hereinafter, embodiments and comparative examples of the present invention will be described in detail. The present invention is to be understood only by the following examples and is not intended to limit the scope of protection of the claims.

Example 1

A polyethylene terephthalate (PET) is melted to prepare a melt of a sea component by melting a co-polyester in which 5 mol% of a polyester unit containing a metal sulfonate is copolymerized with polyethylene terephthalate as a main component, Prepare a melt of the component. Thereafter, the filament was spin-cast using 50 wt% of the melt of the sea component and 50 wt% of the melt of the lead component to obtain filaments having a monofilament fineness of 3 denier and a cross section of 16 filaments. The filament was drawn at a draw ratio of 3.5 And then drawn to produce a filament type sea-island fiber. Thereafter, a crimp process was carried out using the sea-island fibers so as to have a crimp number of 15 / inch, followed by heat setting at 130 ° C, followed by cutting to 51 mm to prepare staple-shaped sea-island fibers.

Thereafter, the web was formed through a carding process and a cross lapping process of the staple-shaped sea-island fibers, and then the webs were subjected to a needle punching process to produce a nonwoven fabric.

Thereafter, the nonwoven fabric was padded with a 5 wt% aqueous solution of polyvinyl alcohol, dried, and the dried nonwoven fabric was immersed in a solvent of dimethylformamide (DMF) at a concentration of 10 wt% and a polyurethane Solution for 3 minutes. Thereafter, the nonwoven fabric immersed in the polyurethane solution was coagulated in an aqueous solution of dimethylformamide having a concentration of 15% by weight, and was washed with water to obtain a polyurethane-impregnated nonwoven fabric.

Thereafter, the polyurethane-impregnated nonwoven fabric was treated with an aqueous solution of caustic soda having a concentration of 5% by weight to dissolve the marine components in the composite fibers to perform a microfine process, whereby a unit weight of 346.3 g / m 2, A preliminary artificial leather 30 having air permeability of 56.4 L / min / 100 cm 2 was obtained.

Then, a flame retardant composition having a viscosity of 7,800 cps blended with 40% by weight of water, 40% by weight of phosphoric flame retardant of ammonium polyphosphate, and 20% by weight of polyurethane binder, 1, and then dried by hot air at 130 DEG C for 10 minutes to obtain an antistatic layer having an area ratio of 65%, an upper thickness (a) of 16 mu m, and a penetration depth (b) An artificial leather having a flame retardant composition layer 10 of 100 mu m was obtained. The rotary screen coating was performed using an ICHINOSE rotary screen printer and an 80 mesh screen manufactured by STORK.

Examples 2 and 3

Artificial leather was obtained in the same manner as in Example 1, except that the area ratio of the flame retardant composition layer 10 was changed to 75 and 85%, respectively, in Example 1 described above.

Example 4

In Example 1 described above, artificial leather was obtained in the same manner as in Example 1, except that the flame retardant composition was applied in a shape as shown in Fig.

Examples 5 and 6

Artificial leather was obtained in the same manner as in Example 4, except that the area ratio of the flame retardant composition layer 10 was changed to 75 and 85%, respectively, in Example 4 described above.

Example 7

In Example 1 described above, artificial leather was obtained in the same manner as in Example 1, except that the flame-retardant composition was applied in the shape as shown in Fig.

Comparative Example 1

In Example 1 described above, artificial leather was obtained in the same manner as in Example 1, except that the flame-retardant composition was applied to the entire surface of the preliminary artificial leather (30).

Comparative Example 2

Artificial leather was obtained in the same manner as in Example 1, except that the area ratio of the flame retardant composition layer 10 was changed to 55% in Example 1 described above.

Next, the physical properties of the artificial leather obtained by the above examples and comparative examples were measured by the following methods, and the measurement results are shown in Table 1.

The area ratio (%) of the flame retardant composition layer 10

The area ratio (%) of the flame retardant composition layer 10 is a ratio of the area occupied by the flame retardant composition layer 10 formed on the preliminary artificial leather 30 to the total surface area of the preliminary artificial leather 30.

Specifically, a sample having a size of 50 × 50 cm was prepared by selecting an arbitrary point on artificial leather, and a sample prepared using an image analyzer (using JVC Digital Camera KY-F70B in Image-Pro Plus software) After the surface was photographed, the area ratio of the flame retardant composition layer 10 was measured by the following equation through an area analysis program. A total of five samples were used, and the measured results were arithmetically averaged to finally determine the area ratio of the flame-retardant composition layer (10).

[Mathematical Expression]

(%) Of the flame retardant composition layer 10 = (area of the flame retardant composition layer 10 applied to the preliminary artificial leather 30 / area of the preliminary artificial leather 30) x 100

The upper thickness ratio (%) of the flame retardant composition layer 10

The upper thickness ratio (%) of the flame retardant composition layer 10 is set so that the ratio of the upper layer thickness of the flame retardant composition layer 10 to the average thickness c of the preliminary artificial leather layer 30, (A), which is an average height up to the layer 10, is a ratio. The average thickness (c) of the preliminary artificial leather (30) and the upper thickness (a) as an average height to the flame retardant composition layer (10) were measured using a scanning electron microscope (SEM).

Specifically, arbitrary two points are selected so that the interval is 1000 탆 in the cross-sectional SEM photograph of the artificial leather, and the thickness (c) of the preliminary artificial leather 30 at the two points and the thickness The thickness (a) was obtained. The measurements were performed on a total of 5 samples and the measured results were arithmetically averaged to finally determine the average thickness c of the preliminary artificial leather 30 and the average upper thickness a of the flame retardant composition layer 10 . The upper thickness ratio (%) of the flame retardant composition layer 10 was then calculated using the average thickness c of the preliminary artificial leather 30 and the average upper thickness a of the flame retardant composition layer 10.

The penetration depth ratio (%) of the flame retardant composition layer 10

The penetration depth (b) ratio of the flame retardant composition layer 10 is preferably from the surface of the preliminary artificial leather 30 to the average thickness c of the preliminary artificial leather 30 (B), which is the average depth to the infiltrated flame retardant composition layer 10, as a ratio. The average thickness c of the preliminary artificial leather 30 and the penetration depth b as an average depth to the flame retardant composition layer 10 were measured using a scanning electron microscope (SEM).

Specifically, two arbitrary points are selected so that the interval is 1000 탆 in the cross-sectional SEM photograph of the artificial leather, and the thickness (c) of the preliminary artificial leather 30 at the two points and the penetration of the flame retardant composition layer 10 The depth (b) was obtained. The measurements were performed on a total of five samples and the measured results were arithmetically averaged to finally determine the average thickness c of the preliminary artificial leather 30 and the average penetration depth b of the flame retardant composition layer 10 . The penetration depth ratio (%) of the flame retardant composition layer 10 was then calculated using the average thickness c of the preliminary artificial leather 30 and the average penetration depth b of the flame retardant composition layer 10.

Measurement of application amount of the flame retardant composition layer (10)

(G / m 2) of the flame retardant composition was obtained from the difference between the weight of the preliminary artificial leather 30 before the flame retardant composition layer 10 was formed and the weight of the artificial leather after the flame retardant composition layer 10 was formed.

Measurement of horizontal burning speed of artificial leather

The horizontal burning rate (mm / min), which indirectly indicates the flame retardancy of the artificial leather, was measured according to the FMVSS.No.

Breathability measurement of artificial leather

Air permeability (L / min / 100 cm 2) was measured according to the Frazier test specified in ASTM D 737.

division Groove shape formed in artificial leather area
ratio
(%) Upper thickness
ratio(%) Penetration depth
ratio(%) Application amount
(g / m 2) Horizontal combustion
speed
(Mm / min) Breathability
(L / min / 100 cm 2) Example 1 Discontinuous circles 65 1.7 10.5 35.7 Self-extinguishing 44 Example 2 Discontinuous circles 75 1.7 10.5 44.5 Self-extinguishing 37 Example 3 Discontinuous circles 85 1.7 10.5 49.8 Self-extinguishing 33 Example 4 Discrete lines 65 1.7 10.5 38.1 Self-extinguishing 46 Example 5 Discrete lines 75 1.7 10.5 43.1 Self-extinguishing 37 Example 6 Discrete lines 85 1.7 10.5 51.1 Self-extinguishing 34 Example 7 One groove surrounding the discontinuous plurality of circular application areas 65 1.7 10.5 33.7 99 46 Comparative Example 1 There is no groove due to the full application of the flame retardant composition 100 1.7 10.5 60.6 Self-extinguishing 15 Comparative Example 2 Discontinuous circles 55 1.7 10.5 30.6 141 49

10: Flame retardant composition layer 20: Home
30: Preliminary artificial leather

Claims (9)

A preliminary artificial leather comprising a nonwoven fabric made of microfine fibers and an elastic polymer resin impregnated in said nonwoven fabric; And
And a layer of a flame retardant composition formed by partially applying a flame retardant composition on the preliminary artificial leather in an area ratio of 60 to 90% of the total surface area of the preliminary artificial leather,
Wherein the flame retardant composition layer comprises a urethane-based binder containing silicon. The method according to claim 1,
Wherein the artificial leather has a plurality of grooves discontinuously distributed corresponding to the non-applied regions of the preliminary artificial leather to which the flame retardant composition is not applied. 3. The method of claim 2,
Wherein the flame retardant composition layer is a single body surrounding the grooves. 3. The method of claim 2,
Wherein each of the grooves is circular, polygonal or line-shaped. The method according to claim 1,
The horizontal burning speed of the artificial leather measured according to FMVSS.No. 302 automobile interior material burning test specification is 100 mm / minute or less, and the air permeability of the artificial leather is 20 to 50 L / minute / 100 cm 2 Artificial leather. The method according to claim 1,
Wherein the flame retardant composition layer has an upper thickness in the range of 0.1 to 4% of the thickness of the preliminary artificial leather and an infiltration depth in the range of 5 to 50% of the thickness of the preliminary artificial leather. The method according to claim 1,
Wherein the flame retardant composition layer comprises a phosphorus-based flame retardant. delete The method according to claim 1,
Wherein a fineness of the microfine fibers is 0.3 denier or less.
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