KR20130035414A - Polyester nonwoven fabric and method for manufacturing the same - Google Patents

Abstract

PURPOSE: A polyester non-woven fabric and a method for fabricating the same are provided to adhere filaments through a simple process by heating a web formed of the filaments. CONSTITUTION: A polyester non-woven fabric comprises a single spinning filament and a core-sheath filament. The single spinning filament contains a first polyester with a melting point at 250 deg. C or higher. The core-sheath filament contains a first polyester with 70-95 wt% of a core ingredient, and a second polyester with 5-30 wt% of a sheath ingredient. The melting point of the second polyester is lower than the melting point of the first polyester by 20 deg.C or more.

Description

Polyester Nonwoven Fabric and Method for Manufacturing the Same {Polyester Nonwoven Fabric and Method for Manufacturing The Same}

The present invention relates to a polyester-based nonwoven fabric and a method for producing the same, which can be usefully used for a carpet backing substrate for carpet because it has good physical properties even after the tufting process.

In general, a polyester nonwoven fabric made of polyester filament fibers as a carpet bubble paper is widely used. By the way, in manufacturing a carpet using such a carpet bubble paper, a tufting process of grafting a carpet company to the carpet bubble paper by a needle is required.

At this time, in the process of implanting the carpet yarn by the needle (Needle), the filament fibers constituting the polyester-based nonwoven fabric is damaged by the needle has a disadvantage that the physical properties such as strength, elongation or tear strength of the nonwoven fabric is lowered.

In order to solve these disadvantages, various methods have been proposed, but are still insufficient technically and commercially.

For example, Korean Patent Publication No. 1998-0061102 discloses forming a filament fiber and a web using two polyester polymers, and then punching a needle and passing a calender roll to produce a spunbonded nonwoven fabric for carpet foam. A method is disclosed. However, in this method, not only the overall manufacturing process is complicated, but also the breakage after the tufting process of planting carpet yarns becomes more serious because the breakage of the filament fibers appears in the process of binding the filament fibers by needle punching. Therefore, the nonwoven fabric produced by this method still exhibits a disadvantage in that the physical properties after tufting are greatly reduced, and it is difficult to apply for carpet bubble paper.

In addition, Korean Patent Laid-Open Publication No. 2001-0053138 discloses a method of manufacturing carpet bubble paper through a process of spinning a polyester and polylactic acid (PLA) by a composite spinning method to produce a release cross-section yarn. However, this method is prone to radiation defects because of poor radioactivity, and the high production cost of polylactic acid is high.

Accordingly, there is a continuing need for a nonwoven fabric and a method for manufacturing the same, which can be manufactured with a simpler process and a lower manufacturing cost, and which can be preferably used as a carpet bubble paper as it has good physical properties even after the tufting process.

One aspect of the present invention is to provide a polyester-based nonwoven fabric which can be usefully used for carpet bubble paper because it has good physical properties even after the tufting process.

Another aspect of the present invention is to provide a method for producing a polyester-based nonwoven fabric which can be usefully used for carpet bubble paper at low cost of production using a simplified process since it has good physical properties even after the tufting process.

According to one aspect of the present invention as described above, including a single-spun filament having a fineness of 4 to 10 deniers, and a sheath filament having a fineness of 4 to 10 denier, the single-spun filament is a melting point having a melting point of 250 ℃ or more 1 polyester, wherein the poncho filament comprises 70 to 95 wt% of the first polyester as a core component and 5 to 30 wt% of the second polyester as a supercomponent, wherein the second polyester A polyester nonwoven fabric having a melting point of at least 20 ° C. lower than the melting point of the first polyester is provided.

According to another aspect of the invention, the step of single spinning the first polyester for the formation of a single spinning filament, the composite spinning of the first polyester and the second polyester to form a myopic filament-wherein the second 1 polyester is a core component and said second polyester is a supercomponent-forming a web with said single spun filament and said poncho filament, and heat is applied to said web such that said single spun filament and said pleated filament adhere Provided is a method for producing a polyester-based nonwoven fabric comprising the step of adding.

According to the present invention, a polyester-based nonwoven fabric having excellent tensile strength, elongation, tear strength and the like can be provided even after the tufting process. Therefore, the polyester nonwoven fabric of the present invention can be usefully used for carpet bubble paper.

In addition, according to the present invention, the filaments can be bonded to each other through a simple process of applying heat to the web formed of the filaments. Therefore, the nonwoven fabric of the present invention can be manufactured at a simplified process and low cost without a separate needle punching process.

Hereinafter, a polyester-based nonwoven fabric and a method of manufacturing the same according to embodiments of the present invention will be described in detail.

The nonwoven fabric of the present invention comprises a single spinning filament having a fineness of 4 to 10 deniers and a core-sheath type filament having a fineness of 4 to 10 deniers.

The single spun filament is formed by spinning the first polyester polymer having a melting point of 250 ° C. or higher alone.

The core sheath polyester filament comprises a first polyester polymer as a core component and a second polyester polymer as a sheath component. That is, the core sheath polyester filament includes, as the core component, the same first polyester polymer as the single-spun filament as the core component. The second polyester polymer, which is the primary component of the deep sheath polyester, has a melting point of at least 20 ° C. lower than that of the first polyester polymer. That is, the core component of the core sheath polyester filament has a relatively high melting point compared to the island component.

Since the heart-shaped polyester filament of the nonwoven fabric of the present invention includes a second polyester polymer having a relatively low melting point on its surface as a supercomponent, it can be easily adhered to the single-spun polyester filament when heat is applied. Therefore, according to the present invention, since the filaments can be easily adhered to each other and a nonwoven fabric can be manufactured even if the processes such as needle punching are not carried out separately, the manufacturing process of the nonwoven fabric can be simplified, and the filaments caused during the needle punching process can be simplified. Can be prevented from being broken.

Furthermore, since the polyester-based nonwoven fabric of the present invention further includes a single-spun polyester filament in addition to the core sheath polyester filament, the fluidity of the filament can be secured during the tufting process for carpet production. Filament damage by needles can be minimized. As a result, when the nonwoven fabric of the present invention is used for carpet production, filament damage due to the needle can be minimized during the tufting process, compared to the nonwoven fabric composed only of the heart sheath filament, and the nonwoven fabric such as tensile strength and tear strength even after the tufting process Physical properties can be maintained in an excellent state.

The single-spun filament and the deep sheath filament constituting the nonwoven fabric of the present invention may have substantially the same fineness within the range of 4 to 10 denier.

In the case of the nonwoven fabric produced by the conventional blend fiber spinning, the first polyester filament having a high melting point is composed of a large island degree, and the second polyester filament having a low melting point serving as an adhesive has a medium fineness (eg, 3 ~ 5 denier). That is, heterogeneous filaments of different fineness are mixed. On the contrary, since the nonwoven fabric of the present invention is made of a single spinning filament having a substantially identical fineness and a pleated filament, the nonwoven fabric has larger voids than the nonwoven fabric produced by the interwoven spinning, and may cause filaments during the tufting process. Is less likely to break.

In summary, when the nonwoven fabric of the present invention is used in the manufacture of carpets, the physical properties of the nonwoven fabric due to the tufting process can be significantly prevented. Since the nonwoven fabric properties such as strength, elongation, and tear strength can be maintained even after the tufting process, the nonwoven fabric of the present invention can be usefully used for carpet bubble paper.

As described above, the polyester-based nonwoven fabric of the present invention further comprises a pleated filament in addition to the single-spun filament, the pleated filament includes two kinds of polyester polymers. The first polyester polymer forming the core component of the myelin sheath filament may have a melting point of 250 ° C. or higher, preferably 250 to 280 ° C., and the second polyester polymer forming the supercomponent of the myelin sheath filament may be It may have a melting point of 20 ° C. or more lower than that, preferably 180 to 230 ° C.

If the melting point of the second polyester polymer is too low, heat shrinkage may occur during the post-processing of the carpet bubble paper obtained using the nonwoven fabric, thereby reducing dimensional stability. On the contrary, when the melting point of the second polyester polymer is too high, the heat treatment temperature required to melt the supercomponents of the heart sheath filament for adhesion with other filaments around it becomes high. An excessively high heat treatment temperature lowers the nonwoven material properties, such as tear strength, in particular properties after the tufting process.

As the first polyester polymer, for example, a conventional polyester polymer having an intrinsic viscosity (I.V.) of about 0.655 can be used without particular limitation. For example, polyethylene terephthalate or polynaphthalene terephthalate may be used as the first polyester polymer, and various polyester polymers may be used.

In addition, as the second polyester polymer, a copolymer having a lower melting point by copolymerizing adipic acid or isophthalic acid to a polymer such as the above-described polyester polymer, for example, polyethylene terephthalate or polynaphthalene terephthalate It is also possible to use a polymer having a low melting point by itself, such as polybutylene terephthalate or polytrimethylene terephthalate.

According to one embodiment of the present invention, in the polyester-based nonwoven fabric, the ratio of the number of single-spun polyester filaments and the sheath type polyester filament is 1: 9 to 9: 1.

If the number of the pleated filaments exceeds 9 times the number of single-spun filaments, there will be no effect of improvement since it will show almost the same physical properties as the conventional nonwoven fabric produced only in the form of the deep reechophysiologically conjugated filaments. On the other hand, if the number of single-spun filaments exceeds 9 times the number of pleated filaments, the heat treatment temperature required for bonding between the filaments becomes too high, and as a result, nonwoven fabric properties such as tear strength, in particular, non-woven fabrics after the tufting process Physical properties are lowered.

According to an embodiment of the present invention, the content of the first polyester polymer in the poncho polyester filament is 70 to 95% by weight, and the content of the second polyester polymer is 5 to 30% by weight.

When the content of the second polyester polymer forming the supercomponent of the core sheath polyester filament is too low, less than 5% by weight, the adhesion between the filaments is weakened, making it difficult to produce a nonwoven fabric for carpet foam of excellent physical properties, Due to the lack of radioactivity in the process of making a deep filament through the process is a lot of constraints. In addition, since the content of the core component is too large, the supercomponent may not be uniformly disposed around the core component, and thus there may be a problem in that thermal bonding between the filaments is not sufficiently performed.

On the other hand, if the content of the second polyester polymer exceeds 30% by weight too large, since the adhesion between the filaments is strong, the breakage of the filament occurs a lot during the tufting process, the nonwoven fabric properties after the tufting process It can be greatly degraded. In particular, the content of the first polyester polymer, which is the core component of the heart sheath polyester filament, is too low, thereby lowering the strength of the nonwoven fabric.

Therefore, it is important to maintain the proper content ratio of the core component and the supercomponent of the myocardial filament, as well as to form a uniform cross section, and to maintain the properties of the filament and the overall nonwoven fabric.

In addition, the polyester-based nonwoven fabric is made of the above-described filaments, the fineness is adjusted to 4 to 10 denier, and does not substantially include filaments beyond the fineness. As a result of the experiments of the present inventors, when the fineness of the filament is less than 4 denier, the filament is thin and the number of filaments per unit area increases. In addition, the interlacing point between the filaments is increased, thereby causing a large number of filament breakage caused by the needle during the tufting process, the non-woven fabric properties after the tufting process can be greatly reduced. On the other hand, with filaments exceeding 10 denier, it is difficult to commercially produce a uniform nonwoven fabric.

On the other hand, the polyester-based nonwoven fabric described above may further comprise an emulsion applied to the surface of the nonwoven fabric in an amount of 0.2 to 2.0% by weight relative to the weight of the nonwoven fabric. In this case, as the oil agent, an oil compound mainly containing an ester compound or a silicone compound such as polydimethylsiloxane or the like may be used.

Such an emulsion is a component for suppressing friction between the filament of the needle and the non-woven fabric used in the tufting process and thus the breakage of the filament, and when the content of the emulsion is too small to less than 0.2% by weight, Friction between the filament fibers may occur, causing breakage of the filament fibers, and excessively larger than 2.0% by weight may cause stickiness due to excessive use of the emulsion or transfer of the emulsion during long-term storage.

The polyester-based nonwoven fabric described above may have a weight per unit area of 120 g / m ² , which is typically used as a carpet bubble paper, and thus may exhibit physical properties such as strength suitable for use as a carpet bubble paper.

The polyester-based nonwoven fabric as described above may be suitably used for carpet bubble paper because filament breakage is appropriately suppressed during the tufting process for transplantation of the carpet company and thus excellent properties may be exhibited even after the tufting process. In addition, since the polyester-based nonwoven fabric can be easily manufactured by thermally bonding the filaments constituting the polyester-based nonwoven fabric, the manufacturing process becomes easy and simple, and the manufacturing cost thereof can also be greatly reduced.

Hereinafter, the manufacturing method of the polyester type nonwoven fabric of this invention is demonstrated concretely.

Method for producing a polyester-based nonwoven fabric of the present invention, the step of single spinning the first polyester to form a single spinning filament, the composite spinning of the first polyester and the second polyester to form a myocho filament- Wherein the first polyester is a core component and the second polyester is a supercomponent-forming a web from the single-spun filament and the eccentric filament, and wherein the single-spun filament and the pleated filament adhere to each other. Applying heat to the web.

Through this manufacturing method, it is possible to easily produce the above-described polyester nonwoven fabric having excellent physical properties even after tufting, and in particular, the filament fibers can be easily thermally bonded without additional processes such as needle punching process to form the nonwoven fabric. It can manufacture.

Hereinafter, the polyester nonwoven fabric will be described in detail.

First, the first and second polyester polymers are melted with respective extruders. Subsequently, the first polyester is spun alone to form single-spun filaments, and the first polyester and the second polyester are spun together to form a deep sheath filament. The first polyester forms a core component of the myelin sheath filament and the second polyester forms a supercomponent of the myelin sheath filament. Optionally, the single spinning and the composite spinning can be carried out simultaneously through a single detention. The single spinning and composite spinning can be carried out at a spinning speed of 4,500 to 5,000m / min.

Subsequently, the single-spinning filaments and the pleated filaments are stretched using a high-pressure air drawing device so that the single-spinning filaments and the heart sheath filaments have a fineness of 4 to 10 deniers.

Subsequently, a web is formed of the single-spun filament and the herbicidal filament through an open threading method, and then heat is applied to the web to bond the single-spinned filament and the pleated filament to prepare a polyester nonwoven fabric.

In this case, as a heat source used for adhesion between the filaments, it is generally possible to use a high-temperature / high pressure calender roll or emboss roll applied in the nonwoven fabric manufacturing process, it is more preferable to use hot air.

In the case of thermally bonding the filament fibers by the high temperature / high pressure rolls, physical properties such as strength or elongation of the nonwoven fabric appear high, but the filaments are excessively dense because the thickness of the nonwoven fabric becomes thinner. This deteriorates the mobility of the filament in the nonwoven fabric, which can cause a large number of breakage of the filament by the needle in the tufting process. In particular, since the filaments are fused at the portion embossed by the roll, the breakage of the filament may become more serious when the needle passes through the portion. For this reason, the physical properties after the tufting process of the polyester nonwoven fabric finally manufactured may be greatly reduced, and thus it may be difficult to use the carpet bubble paper.

In contrast, when the filaments are thermally bonded to each other using the hot air, the filaments are easily heated by melting the low-melting-point second polyester polymer on the surface of the core sheath filament constituting the nonwoven fabric without causing such a problem. Can be bonded. Therefore, the initial physical properties of the final polyester nonwoven fabric and the physical properties after the tufting process can be excellent.

In the heat bonding process using the hot air, a heat setting device that injects hot air like a tenter can be used, and the temperature of the hot air can correspond to the melting point of the second polyester polymer. However, the step of adjusting the non-woven fabric of uniform thickness by pressing the filament fibers laminated in the web form by a calender roll of low temperature / low pressure before applying the hot air is applicable.

On the other hand, the method of manufacturing the polyester-based nonwoven fabric, after applying heat to the web for adhesion between the filaments, further comprising the step of applying an emulsion of 0.2 to 2.0% by weight relative to the weight of the web on the surface of the web It may also include.

In this way, by applying a predetermined amount of the emulsion to the surface of the nonwoven fabric, it is possible to reduce the friction between the needle and the filament fibers forming the nonwoven fabric used in the tufting process, further reducing the breakage of the filament fibers in the tufting process tough The physical property of the nonwoven fabric after a casting process can be improved more. However, when the emulsion is applied too much, it is not preferable because the movement of the emulsion may occur during long-term storage of sticky or nonwoven fabrics.

The polyester-based nonwoven fabric produced by the present invention can be usefully used as a carpet bubble paper because it has excellent initial physical properties and physical properties after the tufting process.

In the present invention, matters other than those described above can be added or subtracted as required, and therefore, the present invention is not particularly limited thereto.

Hereinafter, the configuration and effects of the present invention will be described in more detail with reference to specific examples and comparative examples in order to help understanding of the present invention. However, the following examples are only intended to more clearly understand the present invention, and are not limited to the following examples of the present invention.

[Example]

Example 1

(Manufacture of Filament Fiber)

Polyethylene terephthalate copolymer [Co-PET (AA) / melting point: 210 ° C.] and polyethylene terephthalate polymer (PET / melting point: 255 ° C.) copolymerized with adipic acid were melted using a continuous extruder at a spinning temperature of 288 ° C., respectively. . Subsequently, single spinning filaments were formed by spinning only with PET, and at the same time, PET and Co-PET (AA) were spun to form a deep sheath filament. At this time, by controlling the number of capillary pores and the amount of discharge, the ratio of the number of single-spinning filament and the poncho filament was 9: 1, and the poncho filament was 85 wt% PET as the core component and 15 wt% as the supercomponent. % Of Co-PET (AA). Subsequently, the continuous filaments discharged through the detention were solidified with a cooling air at 25 ° C., and then sufficiently stretched to have a spinning speed of 5,000 m / min using a high pressure air drawing apparatus.

(Manufacture of Spunbond Nonwoven Fabric)

The filaments were laminated in the form of a web on a metal net continuously moving by a conventional opening method. Subsequently, the filaments of the web were bonded to each other at the melting point of the Co-PET (AA) by applying heat to the web using a hot air device, thereby preparing a polyester-based nonwoven fabric having a weight per unit area of 120 μg / m 2.

(Tanning process)

The nonwoven fabric prepared above was treated with 1.0 wt% emulsion relative to the nonwoven weight.

Example 2

A polyester-based nonwoven fabric was manufactured in the same manner as in Example 1, except that the contents of the PET and the Co-PET (AA) of the myelin sheath filament were 95% by weight and 5% by weight, respectively.

Example 3

A polyester-based nonwoven fabric was manufactured in the same manner as in Example 1, except that the contents of the PET and Co-PET (AA) of the myelin sheath filament were 70% by weight and 30% by weight, respectively.

Example 4

The cardiac filament contained polyethylene terephthalate copolymer [Co-PET (IPA) / melting point: 208 ° C.] copolymerized with isophthalic acid instead of Co-PET (AA) as a supercomponent, and contained PET and A polyester-based nonwoven fabric was prepared in the same manner as in Example 1, except that the contents of Co-PET (IPA) were 85 wt% and 15 wt%, respectively.

Example 5

The cardiac filament contained polybutylene terephthalate polymer (PBT / melting point: 224 ° C.) instead of Co-PET (AA) as a supercomponent, and the content of PET and PBT in the cardiac filament was 85% by weight and A polyester-based nonwoven fabric was produced in the same manner as in Example 1, except that it was 15% by weight.

Example 6

The cardiac filament contained polytrimethylene terephthalate polymer (PTT / melting point: 221 ° C.) instead of Co-PET (AA) as a herbaceous component, and the content of PET and PTT in the cardiac filament was 85% by weight and A polyester-based nonwoven fabric was produced in the same manner as in Example 1, except that it was 15% by weight.

Example 7

A polyester-based nonwoven fabric was manufactured in the same manner as in Example 1 except that the fine spinning filaments and the poncho filaments had 4 deniers.

Example 8

A polyester-based nonwoven fabric was produced in the same manner as in Example 1, except that the nonwoven fabric was treated with an oil of 0.2 wt% based on the weight of the nonwoven fabric.

Example 9

A polyester-based nonwoven fabric was manufactured in the same manner as in Example 1, except that the number ratio of the single-spun filament and the poncho filament was 1: 9.

[Comparative Example]

Comparative Example 1

A polyester-based nonwoven fabric was manufactured in the same manner as in Example 1, except that the fine spinning filaments and the deep sheath filaments had 3 deniers.

Comparative Example 2

A polyester-based nonwoven fabric was manufactured in the same manner as in Example 1 except that the contents of the PET and the Co-PET (AA) of the myelin sheath filament were 96% by weight and 4% by weight, respectively.

Comparative Example 3

A polyester-based nonwoven fabric was manufactured in the same manner as in Example 1 except that the contents of the PET and the Co-PET (AA) of the myelin sheath filament were 69 wt% and 31 wt%, respectively.

Comparative Example 4

A polyester-based nonwoven fabric was manufactured in the same manner as in Example 1, except that the number ratio of the single-spun filament and the poncho filament was 91: 9.

Comparative Example 5

A polyester-based nonwoven fabric was manufactured in the same manner as in Example 1, except that the ratio of the number of single-spun filaments and the poncho filament was 9:91.

Comparative Example 6

A polyester-based nonwoven fabric was prepared in the same manner as in Example 1 except that the nonwoven fabric was made of only a deep sheath filament without a single spinning filament.

Comparative Example 7

Intermixing spinning was performed to form a PET filament having a fineness of 10 deniers and a Co-PET (AA) filament having a fineness of 4 deniers, respectively. Except for producing a polyester-based nonwoven fabric in the same manner as in Example 1.

The characteristics of the composition of the polyester nonwoven fabrics of Examples 1 to 9 and Comparative Examples 1 to 7 prepared as described above are summarized in Table 1 below.

Weight per unit area
(g / m ² ) Single spinning filament Echo type filament
[Core Components: PET (Melting Point: 255 ° C)] Emulsion Content
(weight%)
ingredient Melting point
(℃) Number of filaments
(%) Island
(Denier) Ingredient Melting point
(℃) Number of filaments
(%) Island
(Denier) Compound ratio
(Core ingredient / super ingredient) Example 1 120 PET 255 90 10 Co-PET
(AA) 210 10 10 85/15 1.0 Example 2 120 PET 255 90 10 Co-PET
(AA) 210 10 10 95/5 1.0 Example 3 120 PET 255 90 10 Co-PET
(AA) 210 10 10 70/30 1.0 Example 4 120 PET 255 90 10 Co-PET
(IPA) 208 10 10 85/15 1.0 Example 5 120 PET 255 90 10 PBT 224 10 10 85/15 1.0 Example 6 120 PET 255 90 10 PTT 221 10 10 85/15 1.0 Example 7 120 PET 255 90 4 Co-PET
(AA) 210 10 4 85/15 1.0 Example 8 120 PET 255 90 10 Co-PET
(AA) 210 10 10 85/15 0.2 Example 9 120 PET 255 10 10 Co-PET
(AA) 210 90 10 85/15 1.0 Comparative Example 1 120 PET 255 90 3 Co-PET
(AA) 210 10 3 85/15 1.0 Comparative Example 2 120 PET 255 90 10 Co-PET
(AA) 210 10 10 96/4 1.0 Comparative Example 3 120 PET 255 90 10 Co-PET
(AA) 210 10 10 69/31 1.0 Comparative Example 4 120 PET 255 91 10 Co-PET
(AA) 210 9 10 85/15 1.0 Comparative Example 5 120 PET 255 9 10 Co-PET
(AA) 210 91 10 85/15 1.0 Comparative Example 6 120 - Co-PET
(AA) 210 100 10 85/15 1.0 Comparative Example 7 120 PET 255 85 wt% 10 - 1.0 Co-PET (AA) 210 15 wt% 4

* In Table 1, PET represents polyethylene terephthalate, AA represents adipic acid, IPA represents isophthalic acid, PBT represents polybutylene terephthalate, and PTT represents polytrimethylene terephthalate.

[Experimental Example]

The polyester nonwoven fabrics prepared in Examples 1 to 9 and Comparative Examples 1 to 7 were evaluated for tensile strength, elongation and tear strength before and after the tufting process by the following method, and the results are shown in Table 2.

Experimental Example 1: Tensile Strength (kg.f / 5cm) / Elongation (%)

KS K 0521 method was used. Specifically, the width × length = 5cm × 20cm size of the nonwoven fabric was measured by a 200mm / min after the bite with a 5cm × 5cm jig up / down using a measuring instrument of INSTRON company.

Experimental Example 2: Tear Strength (kg.f)

KS K 0536 (Single Tongue) method was used. Specifically, after cutting 7 cm in the middle of a non-woven fabric specimen having a width × length = 7.6cm × 20cm size, it was measured at a tensile speed of 300mm / min using an INSTRON measuring equipment.

Experimental Example 3: Tufting Process

The tufting process was performed on a nonwoven fabric in a tufting machine set to 1/10 gauge. After the tufting process, the physical properties were measured by the methods described in Experimental Examples 1 and 2.

Before the tufting process After tufting process Remarks
The tensile strength
(kg.f / 5cm) Elongation
(%) Tear strength
(kg.f) The tensile strength
(kg.f / 5cm) Elongation
(%) Tear strength
(kg.f) Example 1 26.5 / 26.9 28.5 / 29.5 11.5 / 12.1 18.8 / 18.7 27.8 / 28.2 9.1 / 9.5 ◎ Example 2 26.0 / 26.1 27.8 / 28.2 10.5 / 10.6 18.0 / 17.3 27.7 / 29.5 9.0 / 9.8 ◎ Example 3 27.2 / 26.5 30.2 / 32.2 10.7 / 11.0 17.5 / 17.6 28.7 / 27.3 9.0 / 9.2 ◎ Example 4 27.7 / 28.2 31.2 / 33.2 12.1 / 12.2 18.1 / 17.3 29.3 / 31.1 9.2 / 9.1 ◎ Example 5 25.5 / 24.5 32.5 / 35.1 9.1 / 9.7 16.8 / 16.6 27.3 / 29.8 7.1 / 7.0 ◎ Example 6 27.8 / 25.1 32.2 / 33.2 9.2 / 9.3 16.2 / 16.1 27.0 / 29.2 7.0 / 7.2 ◎ Example 7 26.4 / 25.1 34.2 / 36.5 8.5 / 8.6 14.2 / 13.7 27.5 / 26.1 7.0 / 6.9 ○ Example 8 27.7 / 28.2 33.5 / 36.4 9.8 / 9.7 14.6 / 14.7 27.9 / 27.3 6.5 / 7.0 ○ Example 9 28.5 / 28.7 32.3 / 34.1 9.9 / 10.2 16.5 / 16.9 27.2 / 26.9 8.2 / 7.5 ○ Comparative Example 1 26.1 / 26.2 35.2 / 36.6 8.5 / 8.1 11.2 / 13.1 22.5 / 23.1 5.4 / 5.5 △ Comparative Example 2 22.1 / 22.3 25.8 / 26.2 8.5 / 7.8 10.0 / 9.8 20.3 / 22.3 5.1 / 4.2 × Comparative Example 3 29.2 / 30.1 32.2 / 35.2 10.2 / 10.7 11.5 / 11.4 26.7 / 24.3 5.4 / 5.1 △ Comparative Example 4 25.5 / 25.9 28.1 / 28.5 10.5 / 10.1 12.8 / 12.7 26.8 / 24.2 6.2 / 6.9 △ Comparative Example 5 27.7 / 28.3 32.2 / 34.4 9.9 / 9.9 13.5 / 13.8 24.4 / 23.3 5.8 / 6.3 △ Comparative Example 6 28.7 / 29.2 33.5 / 36.4 9.8 / 9.7 13.3 / 12.1 23.2 / 25.5 5.7 / 6.1 △ Comparative Example 7 25.6 / 24.8 26.7 / 28.9 9.8 / 10.5 13.8 / 13.0 24.8 / 25.6 6.0 / 5.8 △

* In Table 2, remarks show the evaluation on the availability of carpet bubble paper, ◎ is very suitable, ○ is suitable, △ is not suitable, × very not suitable.

Referring to Table 2, the nonwoven fabrics of Examples 1 to 9 exhibited excellent tensile strength, elongation and tear strength properties even before the tufting process, and it was confirmed that the excellent physical properties were maintained without significantly deteriorating even after tufting.

In contrast, the nonwoven fabrics of Comparative Examples 2 to 3 in which the fineness of the filament fibers are too small or the content of the second polyester polymer of the deep sheath composite filament is too large or small are significantly low (both comparative) Example 2) Before the tufting process, some physical properties are expressed, but after the tufting process, the physical properties are much lowered (Comparative Example 3). In addition, when the ratio of the number of filaments of the single-spun filament spun with only the first polyester and the composite filament form in the form of a deep sheath through the first and second polyester is too low (Comparative Example 4) It was confirmed. This shows the physical properties before and after tufting similar to the nonwoven fabric of Comparative Example 7 using mixed fiber spinning. In addition, when the ratio of the number of filaments of the single-spun filament spun with only the first polyester and the composite filament form in the form of a deep sheath through the first and second polyester is too high (Comparative Example 5) It was confirmed that the physical properties after tufting were significantly lowered. This shows the physical properties before and after tufting similar to the nonwoven fabric of Comparative Example 6 using bispun spinning. It can be seen that the tensile strength and tear strength are significantly reduced compared to the nonwoven fabric prepared according to the present invention.

Therefore, it is confirmed that these nonwoven fabrics of Comparative Examples 1 to 7 are particularly low in physical properties of tear strength after the tufting process and cannot be suitably used for carpet bubble paper.

Claims (12)

Single-spun filaments having a fineness of 4 to 10 deniers; And
Including filamentous filaments having a fineness of 4 to 10 denier,
The single-spun filament comprises a first polyester having a melting point of 250 ℃ or more,
The poncho filament comprises 70 to 95 wt% of the first polyester as a core component and 5 to 30 wt% of the second polyester as a supercomponent,
And the second polyester has a melting point of 20 ° C. or lower than that of the first polyester. The method of claim 1,
The polyester-based nonwoven fabric, characterized in that the ratio of the number of the single-spun filament and the core sheath filament in the polyester nonwoven fabric is 9: 1 ~ 1: 9. The method of claim 1,
The first polyester polymer has a melting point of 250 to 280 ℃,
The polyester-based nonwoven fabric, characterized in that the second polyester polymer has a melting point of 180 to 230 ℃. The method of claim 1,
The polyester-based nonwoven fabric, characterized in that the first polyester polymer is polyethylene terephthalate or polynaphthalene terephthalate. 5. The method of claim 4,
The second polyester polymer is a polyester nonwoven fabric, characterized in that the polyethylene terephthalate or polynaphthalene terephthalate is a copolymer copolymerized with adipic acid or isophthalic acid, polybutylene terephthalate, or polytrimethylene terephthalate. . The method of claim 1,
A polyester-based nonwoven fabric further comprising an oil agent. The method according to claim 6,
The emulsion is a polyester nonwoven fabric, characterized in that it comprises a silicone compound. Singly spinning the first polyester to form a sole spinning filament;
Complex spinning the first polyester and the second polyester to form a pleated filament, wherein the first polyester is a core component and the second polyester is a supercomponent;
Forming a web from the single-spun filament and the myopic filament; And
And applying heat to the web such that the single-spun filament and the poncho filament are adhered to each other. 9. The method of claim 8,
The method of producing a polyester-based nonwoven fabric, characterized in that the single spinning and the composite spinning is performed at the same time. 9. The method of claim 8,
Before forming the web, further comprising the step of stretching the single-spinning filament and the cardiac filament so that the single-spun filament and the cardiac filament has a fineness of 4 to 10 denier Manufacturing method. 9. The method of claim 8,
The method of manufacturing a polyester-based nonwoven fabric, characterized in that the step of applying heat to the web using hot air. 9. The method of claim 8,
The method of manufacturing a polyester-based nonwoven fabric further comprises the step of applying an emulsion to the surface of the heat-applied web.