KR102064349B1 - Flooring material and the method of manufacturing the same - Google Patents

Abstract

A thermoplastic, an aromatic polyamide fiber, and a plasticizer, wherein the aromatic polyamide fiber is oriented and provides a flooring wherein the aromatic polyamide fiber surface comprises an ester group and a carbon-carbon single bond.
Irradiating the aromatic polyamide fibers with ultraviolet light to modify the aromatic polyamide fiber surface; Mixing and stirring the surface-modified aromatic polyamide fibers in a liquid plasticizer to form a mixture; And after mixing the thermoplastic resin in the mixture, heat-compressing; provides a flooring manufacturing method comprising a.

Description

Flooring and flooring manufacturing method {FLOORING MATERIAL AND THE METHOD OF MANUFACTURING THE SAME}

It relates to a flooring and a method of manufacturing the flooring.

Flooring used in buildings such as homes and offices can be based on thermoplastics such as polyvinyl chloride (PVC). Since the flooring material using the polyvinyl chloride or the like has poor heat resistance, shrinkage may occur severely in a situation in which a heat source is supplied, particularly in the case of an ondol floor. In order to prevent this, generally, a glass fiber sheet or a glass fiber scrim may be separately manufactured and laminated, or an additive may be introduced to prevent shrinkage. Recently, in order to widen the application range of thermoplastic resins having excellent processability, various attempts have been made to compensate for shrinkage and to reinforce other mechanical properties while securing economical efficiency.

One embodiment of the present invention includes a surface-modified aromatic polyamide fiber is improved bonding to the thermoplastic resin, and provides a flooring material having excellent heat resistance and dimensional stability due to the orientation of the aromatic polyamide fiber.

Another embodiment of the present invention provides a method for producing the flooring material to compensate for the shrinkage and expansion of the flooring material without a separate process for ensuring dimensional stability, and to improve the flooring durability by modifying the aromatic polyamide fiber surface by ultraviolet rays. .

In one embodiment of the present invention, a thermoplastic resin, an aromatic polyamide fiber, and a plasticizer are included, wherein the aromatic polyamide fiber has an orientation, and the aromatic polyamide fiber surface comprises an ester group and a carbon-carbon single bond. Provide flooring.

The ester group may include about 5% to about 15% by weight.

The carbon-carbon single bond may include about 75% by weight to about 95% by weight.

The ester group may be formed by irradiating the aromatic polyamide fiber with ultraviolet rays.

The aromatic polyamide fibers may have a redness (a *) of about −2 to about 5 and a yellowness (b *) of about 20 to about 30.

The aromatic polyamide fibers may have a diameter of about 2 μm to about 20 μm.

The aromatic polyamide fibers can be from about 3 mm to about 10 mm in length.

The aromatic polyamide fibers and plasticizers can be polar.

About 100 parts by weight of the thermoplastic resin, the aromatic polyamide fiber may include about 0.5 parts by weight to about 15 parts by weight.

The plasticizer may include about 20 parts by weight to about 50 parts by weight based on 100 parts by weight of the thermoplastic resin.

The plasticizers are diisononylphthalate (DINP), dioctyl terephthalate (DOTP), dioctylphthalate (DOP), dioctyl adipate (DOA), tricresyl formate (TCP), epoxidized soybean oil (ESO) and these It may include one or more selected from the group consisting of.

About 100 parts by weight of the thermoplastic resin, the filler may further comprise about 100 to about 650 parts by weight,

The flooring may have a thickness of about 2 mm to about 7 mm.

In another embodiment of the invention, the step of irradiating the aromatic polyamide fibers with ultraviolet light to modify the aromatic polyamide fiber surface; Mixing and stirring the surface-modified aromatic polyamide fibers in a liquid plasticizer to form a mixture; And after mixing the thermoplastic resin in the mixture, heat-compressing; provides a flooring manufacturing method comprising a.

An ester group is formed by the ultraviolet irradiation, and the surface of the aromatic polyamide fiber may be modified so that carbon-carbon single bonds are reduced.

The surface of the aromatic polyamide fiber may be modified such that the surface energy is increased by the ultraviolet irradiation.

The surface modified aromatic polyamide fibers may have a redness (a *) of about −2 to about 5 and a yellowness (b *) of about 20 to about 30.

The liquid plasticizer, and the aromatic polyamide fiber may be polar.

The thermo-compression may be performed such that the aromatic polyamide fibers have an orientation.

The flooring material is excellent in heat resistance and dimensional stability, and can be variously used as an adhesive or non-adhesive.

By using the flooring manufacturing method it is possible to simplify the process to reduce the required cost, it is possible to reduce the time required.

1 schematically shows a flooring according to an embodiment of the present invention.

Hereinafter, embodiments of the present invention will be described in detail. However, this is presented as an example, by which the present invention is not limited and the present invention is defined only by the scope of the claims to be described later.

Flooring

In one embodiment of the present invention, a thermoplastic resin, an aromatic polyamide fiber, and a plasticizer are included, wherein the aromatic polyamide fiber has an orientation, and the aromatic polyamide fiber surface comprises an ester group and a carbon-carbon single bond. Provide flooring.

In general, polyvinyl chloride is a thermoplastic resin having low heat resistance and poor dimensional stability due to temperature change, and flooring using polyvinyl chloride has a problem of shrinkage and expansion due to temperature change or supply of heat source in the room. there was.

Accordingly, in order to secure the dimensional stability of the flooring material using polyvinyl chloride, a glass fiber sheet and a glass fiber scrim are laminated separately on the polyvinyl chloride layer, or a glass fiber sheet ), Glass fiber scrim was inserted between the polyvinyl chloride layers to compensate for shrinkage and expansion. However, in this case, a separate plywood equipment is required in the manufacturing process, thereby increasing the manufacturing cost and causing a defect rate in the process.

On the other hand, in the case of containing a large amount of additives to prevent the shrinkage phenomenon it was inefficient to lower the workability and tensile load of the flooring.

Accordingly, one embodiment of the present invention provides a flooring material comprising a thermoplastic resin, an aromatic polyamide fiber, and a plasticizer, wherein the aromatic polyamide fiber is oriented so as to compensate for shrinkage without a separate plywood process.

Figure 1 schematically shows the flooring cut to any size. Referring to Figure 1, in the flooring arbitrarily cut, one direction can be defined in the longitudinal direction, the direction perpendicular to the longitudinal direction can be defined in the width direction.

That the aromatic polyamide fibers have "orientation" does not mean that all the aromatic polyamide fibers are parallel, but that the aromatic polyamide fibers are arranged oriented with respect to any particular one direction. .

In addition, referring to FIG. 1, it is understood that the number of aromatic polyamide fibers per unit area of the fracture surface 120 with respect to the width direction indicates that the aromatic polyamide fibers have an orientation with respect to the longitudinal direction. It may mean that the number of the aromatic polyamide fibers per unit area of the fracture surface 110 is greater.

As such, since the aromatic polyamide fibers have an orientation, the dimensional stability of the flooring material is increased, and heat resistance and durability of the flooring material can be improved.

The aromatic polyamide fiber is one of the organic fiber types, for example, may include aramid fiber, the aramid fiber is excellent in heat resistance and mechanical strength.

About 91% by weight carbon-carbon single bond and about 9% by weight amide group were present on the surface of the aramid fiber, and the amide group showed somewhat hydrophilicity compared to other organic fibers, which resulted in poor adhesion to the thermoplastic resin. As a result, durability was reduced.

In order to solve the above problems, the aramid fibers were exposed to ultraviolet rays for 24 hours to modify the surface of the aramid fibers, and as a result, the carbon-carbon single bond was reduced to about 80% by weight, and ester groups were formed by about 10% by weight. As a result, the hydrophobicity and surface energy of the aramid fiber surface are increased due to the formed ester group, thereby increasing adhesion to the thermoplastic resin.

Therefore, the aromatic polyamide fiber surface-modified by ultraviolet rays can have high interfacial adhesion with the thermoplastic resin by having an ester group and a carbon-carbon bond in the content range.

Specifically, the ester group may be formed by irradiating the aromatic polyamide fibers with ultraviolet rays. The surface of the aromatic polyamide fiber before the surface modification did not have an ester group, but formed an ester group by surface modification, thereby increasing the adhesion to the thermoplastic resin by securing the hydrophobicity.

Thus, the aromatic polyamide fiber may have an orientation and include an ester group and a carbon-carbon single bond on the surface of the aromatic polyamide fiber.

Specifically, the ester group may include about 5% to about 15% by weight, and may include about 75% to about 95% by weight of the carbon-carbon single bond.

By maintaining the ester group in the content, it is possible to modify the physical properties of the surface without inhibiting the mechanical properties of the aromatic polyamide fibers.

Further, the aromatic polyamide fiber having the orientation included in the flooring may have a redness (a *) of about −2 to about 5 and a yellowness (b *) of about 20 to about 30. The surface of the aromatic polyamide fiber is modified by ultraviolet irradiation, which may cause the color of the aromatic polyamide fiber to change color from yellow to dark yellow or brown, and maintain redness and yellowness within the above range. Can be.

In general, when the surface of the fiber has a hydrophilic property, the adhesive strength with the resin of different types is lowered, and thus the utilization is reduced as a composite material. However, the surface of the aromatic polyamide fiber has improved hydrophobicity due to surface modification by ultraviolet irradiation.

As a result, the bonding strength and adhesion between the thermoplastic resin and the aromatic polyamide fiber may be improved, thereby realizing excellent durability of the flooring material.

Specifically, when the redness and yellowness are out of the above ranges, the aromatic polyamide fibers may not be regarded as UV surface treated, and thus, the effects of the surface treatment may not be improved. The presence or absence of ultraviolet surface treatment of the aromatic polyamide fiber can be confirmed.

The aromatic polyamide fibers can be improved in dispersion stability to the polar plasticizer, and has an advantage of improving the physical properties such as mechanical strength, dimensional stability, and the like for the cost.

Specifically, the aromatic polyamide fiber may include aramid fiber, and when it is dispersed in dioctylphthalate (DOP), or dioctyl terephthalate (DOTP), which is a polar plasticizer, the specific gravity of the aramid fiber is the polar plasticizer. Similar to the specific gravity of can maximize the dispersion effect, as a result can be obtained a flooring having excellent dimensional stability and durability.

The aromatic polyamide fiber is incorporated into the flooring itself to improve dimensional stability, and to improve additional physical properties such as durability, and may have a diameter of about 2 μm to about 20 μm. When the diameter of the polar aromatic polyamide fiber is less than about 2㎛, it is difficult to implement the effect of improving the dimensional stability by including the aromatic polyamide fiber in the flooring, and if it exceeds about 20㎛ in the plasticizer in the manufacturing process of the flooring It may not be evenly distributed, which may reduce workability.

The aromatic polyamide fibers can be from about 3 mm to about 10 mm in length. When the length of the aromatic polyamide fiber is less than about 3mm, it is difficult to realize the effect of improving the dimensional stability, and when the length exceeds about 10mm, it is not evenly dispersed in the polar plasticizer during the manufacturing of the flooring material, the fiber itself There is a fear that the kink of the to reduce the durability and strength of the flooring.

The flooring material includes a plasticizer and an aromatic polyamide fiber, and the plasticizer and the aromatic polyamide fiber may have two kinds of interactions, such as polar-polar interaction and polar-nonpolar interaction.

Specifically, the plasticizer and the aromatic polyamide fiber may be polar. Polar-polar interactions are more effective for mixing and dispersing than polar-polar interactions, for example if the flooring contains polar aromatic polyamide fibers with polar plasticizers, By action, the aromatic polyamide fibers can be more stably and uniformly dispersed in the flooring, thereby improving the durability of the flooring.

About 100 parts by weight of the thermoplastic resin, the aromatic polyamide fiber may include about 0.5 parts by weight to about 15 parts by weight. When the aromatic polyamide fiber is included in less than about 0.5 parts by weight, it is difficult to implement the effect of improving the heat resistance and tensile load of the flooring material, when contained in more than about 15 parts by weight there is a fear that workability is lowered.

The plasticizer may include about 30 parts by weight to about 50 parts by weight based on 100 parts by weight of the thermoplastic resin. If the plasticizer is included in less than about 30 parts by weight, there is a problem that the process time is long, and when included in more than about 50 parts by weight, there is a problem that the tensile load of the flooring material is lowered.

The thermoplastic resin is polyvinyl chloride (PVC), polyvinylidene chloride (PVDC), polyvinylidene fluoride (PVF), chlorinated polyvinyl chloride (CPVC), polyvinyl alcohol (PVA), polyvinylacetate (PVAc), Polyvinyl butyrate (PVB), polyethylene (PE), polypropylene (PP), and combinations thereof.

Specifically, the thermoplastic resin may be polyvinyl chloride (PVC) or a resin in which polyvinyl chloride (PVC) and polyvinyl butyrate (PVB) are mixed. Since the polyvinyl chloride (PVC) resin itself has excellent processability but low heat resistance, when the flooring material is included as a thermoplastic resin, it is possible to maximize the effect of improving the dimensional stability of the flooring material, and together with the plasticizer and the aromatic polyamide fiber. By including it can implement excellent tensile load and impact strength.

The plasticizer is a low volatility liquid solvent, and adds soft physical properties to the thermoplastic resin to facilitate processing, and serves to provide flexibility to the flooring. In addition, the plasticizer may improve durability of the flooring material and dimensional stability at high temperature based on excellent compatibility with the aromatic polyamide fiber.

Specifically, the kind of the plasticizer is not limited, but diisononyl phthalate (DINP), dioctyl phthalate (DOP), dioctyl terephthalate (DOTP) which is a nonphthalate type, and dioctyl adipate which is an aliphatic dibasic acid ester system (DOA). ), Tricresylpostate (TCP), epoxidized soybean oil (ESO), and combinations thereof.

For example, the plasticizer may be dioctylphthalate (DOP), or dioctyl terephthalate (DOTP). In this case, since the plasticizer has excellent polarity, it is possible to improve the dispersing effect on the aromatic polyamide fibers of the polarity, thereby increasing the tensile load of the flooring material and ensuring excellent dimensional stability.

The flooring may further include a filler to increase the strength, heat resistance, and durability of the product, and to reduce manufacturing costs. The filler may include one or more selected from the group consisting of calcium carbonate, talc, fly ash, blast furnace slag, and combinations thereof. The filler can be isotropic,

In this case, it is possible to select and use a particle having an appropriate size in consideration of both the economic effect and the improvement effect of physical properties. Specifically, the flooring may include calcium carbonate as filler and may be advantageous in terms of cost and versatility.

In addition, when the flooring material includes calcium carbonate, it may contribute to not only improving heat resistance and durability, but also improving dimensional stability, and tensile load of the flooring material including the thermoplastic resin together with the aromatic polyamide fiber.

When the flooring material includes a filler, the flooring material may include about 100 to about 650 parts by weight of the filler, for example, about 200 to about 400 parts by weight, based on 100 parts by weight of the thermoplastic resin. When the content of the filler satisfies the above range, the filler may exhibit excellent processability.

For example, the flooring material may include about 100 to about 650 parts by weight of calcium carbonate relative to 100 parts by weight of the thermoplastic resin, and in this case, may exhibit excellent cost performance, and may interact with the aromatic polyamide fiber flooring. It may be advantageous in terms of improving the dimensional stability of the.

The flooring may further include an additive containing at least one selected from the group consisting of a heat stabilizer, a lubricant, a processing aid, a reinforcing agent, a coloring agent, and combinations thereof, depending on the use thereof.

The flooring material may further include about 0.3 to about 10 parts by weight of the additive, based on 100 parts by weight of the thermoplastic resin. When the content of the additive satisfies the above range, it is possible to simultaneously implement an advantageous effect in terms of the effects and economics of each additive.

The flooring may have a thickness of about 2 mm to about 7 mm. Existing flooring has a problem in that manufacturing costs are increased by manufacturing a separate cotton cloth or the like, or manufactured in a relatively thick thickness in order to realize appropriate strength and durability, and workability and mobility are reduced. However, the flooring material includes the plasticizer and the aromatic polyamide fiber in the flooring material itself, and the aromatic polyamide fiber has orientation, so that excellent heat resistance, durability, and dimensional stability may be realized even in the thickness range. It can be utilized not only in the adhesive floor material constructed using adhesives, but also in the non-adhesive floor materials constructed using fastening means.

For example, the flooring material may have a thickness of about 2 mm to about 3 mm and has excellent tensile strength and dimensional stability by the composition of the flooring material, as well as non-adhesive flooring material in the thickness range. Edo can be utilized, and the effect of improving processability in the manufacturing process can be realized.

Flooring manufacturing method

In another embodiment of the invention, the step of irradiating the aromatic polyamide fibers with ultraviolet light to modify the aromatic polyamide fiber surface; Mixing and stirring the surface-modified aromatic polyamide fibers in a liquid plasticizer to form a mixture; And after mixing the thermoplastic resin in the mixture, heat-compressing; provides a flooring manufacturing method comprising a.

Conventional flooring to complement the shrinkage phenomenon of the flooring by laminating a glass fiber layer separately from the thermoplastic resin layer, for example, PVC layer or by inserting a glass fiber layer between the PVC layer. However, in this case, a separate plywood equipment is required in the manufacturing process, thereby increasing the manufacturing cost and increasing the defective rate in the process.

Thus, the flooring manufacturing method can ensure the dimensional stability by mixing the aromatic polyamide fibers in the flooring itself, without a separate plywood process.

The flooring manufacturing method may include modifying the surface of the aromatic polyamide fiber by irradiating ultraviolet rays to the aromatic polyamide fiber. By modifying the surface of the aromatic polyamide fiber can improve the adhesion of the thermoplastic resin and the aromatic polyamide fiber, it is possible to implement the excellent durability of the flooring due to the improved adhesion.

For example, the surface of the aromatic polyamide fiber may be modified so that ester groups are formed by the ultraviolet irradiation, and carbon-carbon single bonds are reduced.

Due to the modification, the surface of the aromatic polyamide fiber having only an amine group may include an ester group, and the content of the carbon-carbon single bond including at least about 90% by weight is reduced, so that the surface of the aromatic polyamide fiber is hydrophilic. It is hydrophobically modified to improve adhesion between the aromatic polyamide fiber and the thermoplastic resin.

In addition, the surface of the aromatic polyamide fiber may be modified to increase the surface energy by the ultraviolet irradiation. By modifying the surface of the aromatic polyamide fiber by ultraviolet irradiation, the surface energy of the surface of the aromatic polyamide fiber can be raised to improve the adhesive force with the thermoplastic resin.

Specifically, the ultraviolet irradiation was used 28W lamp having a wavelength of about 180nm and may be performed for about 24 hours to about 72 hours. When the ultraviolet irradiation is irradiated for less than about 24 hours, too little ultraviolet exposure, and when irradiated for more than about 72 hours, the mechanical properties of the fiber itself may be reduced.

The surface of the aromatic polyamide fiber may be modified by ultraviolet irradiation, so that the color inherent in the aromatic polyamide fiber may turn yellow, wherein the redness (a *) of the surface-modified aromatic polyamide fiber is weak. -2 to about 5, and yellowness (b *) may be about 20 to about 30. Matters related to the redness and yellowness are as described above.

The flooring manufacturing method includes mixing and stirring the surface-modified aromatic polyamide fiber with a liquid plasticizer to form a mixture, wherein the surface-modified aromatic polyamide fiber is preferentially mixed with a liquid plasticizer. And by dispersing, the mixture may be in a form in which the surface-modified aromatic polyamide fibers are dispersed in the liquid plasticizer.

Thus, even though the surface-modified aromatic polyamide fibers are used in the form of bulk or roll, the surface-modified aromatic polyamide fibers are evenly applied to the flooring itself without a separate plywood manufacturing process. As a result, it is possible to reduce manufacturing costs, reduce process defects, and at the same time achieve excellent durability and dimensional stability of flooring.

For example, in the step of forming the mixture, the surface-modified aromatic polyamide fibers can be introduced into a liquid plasticizer in bulk or roll form, and the surface-modified aromatic polyamide The fibers may be mixed and dispersed preferentially. Herein, it is meant that the aromatic polyamide fibers having the length in the form of bulk or roll are aggregated in any size and present in the form of lumps or in the form of elongated yarns.

The surface-modified aromatic polyamide fibers can be evenly dispersed throughout the flooring material even if added in bulk or roll form without any additional processing, thereby simplifying the manufacturing process and reducing the manufacturing cost and time. The savings can be realized.

The liquid plasticizer, and the aromatic polyamide fiber may be polar. When dispersing the polar aromatic polyamide fibers in the polar plasticizer, the dispersion can be carried out effectively, compared to the case of dispersing the non-polar aromatic polyamide fibers in the polar plasticizer, the workability of the flooring material is excellent, the production Physical properties such as durability and heat resistance of the finished flooring material can be improved.

The rate at which the mixture is stirred can be about 5 to about 100 rpm. When the speed is less than about 5 rpm, the aromatic polyamide fibers are hardly dispersed in the liquid plasticizer, and when the speed is greater than about 100 rpm, the aromatic polyamide fibers are damaged during the manufacturing process so that There is a possibility that the strength and dimensional stability may not be improved.

Substantially, when stirring the mixture, the aromatic polyamide fibers may swell in a liquid plasticizer, resulting in poor stirring. In this case, the aromatic polyamide fibers may be impregnated with the liquid plasticizer for at least about 5 minutes and then stirred to uniformly disperse the fibers at a stirring speed in the above range.

In addition, the mixture may further include a filler to increase the heat resistance and durability of the flooring material, and to reduce the manufacturing cost, the details of the filler as described above.

In addition, the mixture may further include an additive containing at least one selected from the group consisting of a heat stabilizer, a lubricant, a processing aid, a reinforcing agent, a colorant, and a combination thereof, depending on the use thereof, and the additive, and the kind thereof. Regarding the above is as described above.

The thermo-compression may be performed such that the aromatic polyamide fibers have an orientation, and the thermo-compression may include a pressing process or a calender process. When the thermo-compression is performed in a calender process, the aromatic polyamide fibers are easy to have an orientation, and there is an advantage in mass production of flooring.

 Specifically, when the mixture is thermo-compressed and the flooring is manufactured, when heat-compressing through a calender process, the direction in which the flooring is drawn out may be defined in the longitudinal direction, and the direction perpendicular thereto is defined in the width direction. can do.

For example, the flooring may be heat-compressed to have an orientation in the longitudinal direction, in which case, in particular, it is possible to increase the dimensional stability of the flooring in the longitudinal direction, and the effect of improving heat resistance.

The following presents specific embodiments of the present invention. However, the embodiments described below are merely for illustrating or explaining the present invention in detail, and thus the present invention is not limited thereto.

< Example  And Comparative example >

Example  One

A liquid plasticizer (NEO-T, Aekyung) was prepared, and bulk aramid fibers (Kevlar, dupon) having a diameter of 10 µm and a length of 5 mm were surface-modified by ultraviolet irradiation. The mixture was prepared by mixing into a plasticizer and stirring at a speed of 10 rpm to 200 rpm for 10 minutes. Subsequently, PVC resin (LS100 LG Chemicals), calcium carbonate, and other additives were added to the mixture, and then flooring was prepared by heat-pressing at 180 ° C. for 5 minutes in a calender process. The content of the fiber is 4 parts by weight based on 100 parts by weight of the PVC resin, and the fiber has orientation in the direction in which the flooring material is drawn out.

Example  2

The organic fibers are bulk aramid fibers having a diameter of 10 μm and a length of 10 mm whose surface is modified by ultraviolet irradiation, and the content of the fibers is 6 parts by weight based on 100 parts by weight of the PVC resin. Was prepared in the same manner as in Example 1.

Example  3

The organic fibers are bulk aramid fibers having a diameter of 10 μm and a length of 5 mm whose surface is modified by ultraviolet irradiation, and the content of the fibers is 8 parts by weight based on 100 parts by weight of the PVC resin. Was prepared in the same manner as in Example 1.

Comparative Example 1

Flooring was prepared in the same manner as in Example 1 except that the mixture did not contain aramid fibers.

Comparative example  2

A flooring material was prepared in the same manner as in Example 1 except that the aramid fibers were not surface modified by UV irradiation.

Comparative Example 3

A glass fiber scrim having a mesh shape having a diameter of 14 μm and hole spacing of 4 mm was prepared. Meanwhile, the composition comprising a PVC resin (LS100, LG Chemical), a liquid plasticizer (NEO-T), calcium carbonate, and other additives is melted, and the glass fiber scrim and the composition are heat-treated at 180 ° C. for 5 minutes. It pressed and manufactured the thermoplastic resin layer.

< Experimental Example >- Color index  And dimensional change rate measurement

With respect to the flooring material of the Examples and Comparative Examples, the direction in which the flooring material is produced is defined in the longitudinal direction, the vertical direction in the width direction, the longitudinal direction is made vertical, the width direction in the horizontal, 225 mm X Flooring specimens of 25 mm by 2 mm (width X length X thickness) sizes were prepared.

1) Color Index: The redness (a *) and yellowness (b *) of the specimen were measured using a spectrophotometer (SPECTRO PHOTOMETER CM-700d).

2) Ester group or carbon-carbon single bond content: The ester group or carbon-carbon single bond content included in the specimen was analyzed using XPS (MultiLab2000, thermoco.).

3) Rate of dimensional change: Initial dimensions for the width and length of the specimen were measured at about 25 ° C. Then, using a Dilatometer (Netch Inc.) equipment was measured the rate of dimensional change in the longitudinal direction of the specimen while raising the temperature to about 50 ℃ 5 ℃ / min.

Color index Ester group
, Carbon-carbon single bond content (% by weight) 30 ℃
(%) 35 ℃
(%) 40 ℃
(%) 45 ℃
(%) 50 ℃
(%) Example 1 a *: -0.02
b *: 27.24 11, 87 0.005 0.015 0.025 0.04 0.05 Example 2 a *: 0
b *: 26.67 11, 87 0.005 0.014 0.02 0.03 0.04 Example 3 a *: -1.65
b *: 28.77 11, 87 0.002 0.006 0.01 0.012 0.02 Comparative Example 1 - - 0.005 0.02 0.04 0.08 0.1 Comparative Example 2 - 2, 92 0.002 0.02 0.03 0.045 0.05 Comparative Example 3 - - 0.005 0.02 0.03 0.05 0.06

Referring to Table 1, Examples 1 to 3, which is a flooring material including surface-modified aramid fibers, are different from Comparative Example 1, which is a flooring material not including aramid fibers, and Comparative Example 2, which is a flooring material including unmodified aramid fibers. The color index was exhibited, and the color index was different from that of Comparative Example 3, which is a flooring material including a glass fiber cotton cloth other than the PVC layer, and Comparative Example 4, which is a flooring material containing glass fiber.

In addition, it was found that the aramid fibers of Examples 1 to 3 were surface-modified to include a certain amount of ester groups and carbon-carbon single bonds.

Specifically, it was confirmed that Example 1 is maintained in the dimensional change rate as compared to Comparative Examples 1 to 3 toward the higher temperature.

Further, Example 2 compared to Example 1, Example 3 was smaller than the dimensional change rate compared to Examples 1 and 2, it was confirmed that the dimensional change rate is reduced as the content of the aramid fiber increases.

Comparative Example 3 has a disadvantage in that it is complicated in process compared to Examples 1 to 3 and consumes a lot of costs, and is more stable than Examples 1 to 3 despite using a higher raw material cost than Examples 1 to 3. The product cannot be manufactured. In addition, when the glass fiber is used instead of the aramid fiber, the glass fiber shape may be broken in the process.

100: flooring
110: fracture surface in the longitudinal direction
120: fracture surface in the width direction

Claims (19)

Thermoplastic resins, aromatic polyamide fibers, and plasticizers,
The aromatic polyamide fibers have an orientation,
The aromatic polyamide fiber surface comprises an ester group and a carbon-carbon single bond,
The ester group is formed by irradiating the aromatic polyamide fibers with ultraviolet light,
The aromatic polyamide fiber is a para aramid fiber,
The surface of the aromatic polyamide fiber has improved hydrophobicity
Flooring.
The method of claim 1,
5 wt% to 15 wt% of the ester group
Flooring.
The method of claim 1,
75 to 95 wt% of the carbon-carbon single bond
Flooring.
delete The method of claim 1, wherein the aromatic polyamide fibers have a redness (a *) of -2 to 5 and a yellowness (b *) of 20 to 30.
Flooring.
The method of claim 1,
The aromatic polyamide fiber has a diameter of 2 ㎛ to 20 ㎛
Flooring.
The method of claim 1,
The aromatic polyamide fiber has a length of 3 mm to 10 mm
Flooring.
The method of claim 1,
The aromatic polyamide fibers and plasticizers are polar
Flooring.
The method of claim 1,
To 0.5 parts by weight of the aromatic polyamide fiber with respect to 100 parts by weight of the thermoplastic resin
Flooring.
The method of claim 1,
20 parts by weight to 50 parts by weight of the plasticizer based on 100 parts by weight of the thermoplastic resin
Flooring.
The method of claim 1,
The plasticizer is diisononyl phthalate (DINP), dioctyl terephthalate (DOTP), dioctyl phthalate (DOP), dioctyl adipate (DOA), tricresyl formate (TCP), epoxidized soybean oil (ESO), and At least one selected from the group consisting of a combination of these
Flooring.
The method of claim 1,
100 to 650 parts by weight of the filler, further comprising 100 to 650 parts by weight of the thermoplastic resin
Flooring.
The method of claim 1,
The thickness of the flooring material is 2mm to 7mm
Flooring.
Irradiating ultraviolet rays to the aromatic polyamide fiber to form an ester group on the surface of the aromatic polyamide fiber and modifying the carbon-carbon single bond to reduce hydrophobicity;
Mixing and stirring the surface-modified aromatic polyamide fibers in a liquid plasticizer to form a mixture; And
And mixing the thermoplastic resin with the mixture, followed by heat-compression;
The aromatic polyamide fiber is a para aramid fiber
Flooring manufacturing method. delete delete delete delete delete

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