KR20240043928A - Spunbonded long fiber non-woven fabric loop for hook type fastener used polypropylene modified cross sectional yarn - Google Patents

Abstract

In the present invention, the spunbond long-fiber nonwoven fabric loop for the hook fastening member is made of a polypropylene (PP) long-fiber nonwoven fabric sheet composed of irregular cross-section yarns, thereby improving performance such as detachment and breathability, thereby ensuring excellent fastening force with the hook. In addition, it provides a spunbond long fiber nonwoven fabric loop for a hook fastening member using polypropylene irregular cross-section yarn that has good durability during repeated attachment and detachment. The spunbond long fiber nonwoven fabric loop has a cross-sectional shape of flat (A) or cross-shaped. It is made of a polypropylene (PP) long fiber nonwoven fabric sheet composed of one or more types of irregular cross-section yarns selected from (B), Ottogi-shaped (C), square (D), and triangle (E), and the polypropylene (PP) sheet A fibrous nonwoven sheet is a fibrous structure formed by self-bonding between fibers with a basis weight of 30 to 60 g/㎡ and a thickness of 0.2 to 0.5 mm. The polypropylene (PP) long fiber nonwoven sheet formed as above is placed on an embo roll. It is characterized in that the fused portion 11 and the non-fused portion 12 are formed and joined by passing through the fused portion 11 and the non-fused portion 12.

Description

Spunbond long fiber non-woven fabric loop for hook fastening member using polypropylene special cross-section yarn

The present invention relates to a spunbond long fiber nonwoven fabric loop for a hook fastening member to which polypropylene irregular cross-section yarns are applied. More specifically, the nonwoven fabric loop used in infant/adult diapers, etc. is a polypropylene (PP) long fiber composed of irregular cross-section yarns. By being made of a non-woven sheet, the performance such as detachment and breathability is improved, ensuring excellent fastening force with the hook, and a spunbond long-fiber nonwoven fabric for hook fastening members using polypropylene cross-section yarns that have good durability during repeated attachment and detachment. It's about loops.

There are many loop nonwoven fabrics that can form mechanical bonds with hooks to join disposable products such as baby diapers, adult diapers, bed covers, and surgical gowns, and are easy to attach and detach, are easy to manufacture, and are inexpensive. It is being used.

These disposable products are often used to fasten clothes, shoes, etc. as they have the function of attaching and detaching them by pairing hooks and hooks thanks to the hook and loop fastener for wearing them. , commonly known as ‘Jeokjjikki’ or ‘Velcro’ after the brand name. Among them, loop fasteners are usually manufactured by laminating a film to a multi-layer nonwoven fiber or nonwoven fabric, and such a composite of nonwoven fibers and film is also used to manufacture disposable products such as diapers.

Accordingly, the hook member has an arch shape, a mushroom shape, a hook shape, etc., so that it can be easily aligned by hanging against the loop member, and this mechanical connection prevents each component from being easily separated. In other words, the area where the hook member and the loop member are fastened requires a level of adhesion to maintain normal coupling during use by applying shear stress perpendicular to the surface (peel strength) and tension (shear strength) parallel to the surface.

Meanwhile, in the conventional manufacturing process of non-woven fabric used in loop members, non-woven fabrics or films are laminated with adhesive or heat bonding through a weaving process or a perforation process for non-woven fabric, etc., and this conventional manufacturing method involves the process Since the products are separated, not only is productivity low, but the cost is high, and if the produced product is stored in roll form, the volume is reduced and the soft texture is deteriorated due to punching by heat.

In order to compensate for these shortcomings, a method of forming a wave shape (bend or mound) by transferring non-woven fibers through a pair of rollers with irregularities and then bonding thermoplastic resin films by conventional T-DIE, in which the resin is extruded from one side, is used. However, this is because a single resin film is bonded to one side of the non-woven fabric, so it has extremely limited use as it can only be used as a loop fastener. This is because the volume and feel of the fiber are excellent, and the wave shape is curved up and down. Laminated sheets with a loop-shaped structure are widely used.

The non-woven fabric of the loop system is mainly used as a fastener for disposable products such as personal hygiene materials, clothing, bags, sports equipment, protective clothing, and personal wear for adults and children, and is intended to be used and discarded within a relatively short period of time. Therefore, in terms of product design, lowering the overall material cost and minimizing manufacturing costs have become key technologies. In addition, it must be easy to attach and detach, enable repeated use, have stable bonding performance, and of course have excellent peeling properties.

However, the loop nonwoven fabric manufactured by the conventional method had the disadvantage of generating a lot of lint and not having a stable binding force due to the wave-shaped loop consisting of the top and bottom when used repeatedly in combination with a hook member. In addition, the formation of excessive wave loops in the non-woven fabric makes it difficult to bond with other non-woven fabrics or film layers, and when used as a material in direct contact with the human body, the non-woven fabric has a poor smooth and soft texture on the surface, causing damage to the skin. Not only was there a risk of damage, but it also had the disadvantage of causing a disability as ventilation was excessively reduced.

Likewise, in the field of disposable sanitary products and protective products, there continues to be a need to develop a loop system that can improve overall performance such as softness and breathability in addition to lowering the cost of loop nonwoven fabric and strengthening the mechanical bonding system. This is the situation.

As a prior art to improve the above problems, Republic of Korea Patent Publication No. 10-2006-0008831 (Hanjin P&C Co., Ltd.) reduces the fiber density of the outer surface of the protrusions created by heating and pressing the non-woven fabric or perforating the non-woven fabric while heating and pressing it. In order to provide an adhesive loop sheet composed of a non-woven fiber loop layer, a loop protrusion protrudes from the surface of the non-woven fabric and corresponds to an adhesive hook; The fiber density of the loop projections is lower than that of the non-woven floor; It is a non-woven fabric loop sheet for adhesive consisting of a bonding surface formed on the protrusion corresponding to the preliminaries of the adhesive hook tape. It is a non-woven fabric loop sheet that has good adhesion and stability to the adhesive hook tape and has little loss of adhesive strength even during repeated adhesion. However, there are difficulties in the process of reducing the fiber density of the outer surface of the protrusion.

In addition, Patent Publication No. 10-2010-0119107 (Shinwoo P&C Co., Ltd.) provides a method for manufacturing a loop tape of a hook-loop fastening system with good bonding strength such as peel strength and excellent breathability, and a loop tape formed therefrom. (a) It consists of a ground tissue made of a first fiber containing a first thermoplastic polymer having a predetermined melting point and a second fiber made of a second polymer having a higher melting point or a higher decomposition temperature than the melting point of the first thermoplastic polymer, A loop tissue comprising a plurality of loops formed by being fixed to the ground tissue; and (b) a nonwoven fabric made of third fibers laminated on the lower surface of the loop structure and including a third thermoplastic polymer having a melting point or decomposition temperature lower than the melting point or decomposition temperature of the second polymer, wherein the ground tissue and the nonwoven fabric are The first fiber and the third fiber are heat-sealed to each other by melting.

And, through Korean Patent No. 10-1839298 (Lark Industries Co., Ltd.), the applicant disclosed that the lower layer (S1) is a thermoplastic polyolefin-based long fiber nonwoven fabric sheet with a fineness of 1 to 2 denier, and the upper layer (S2) is a fineness of 4 to 6. A thermoplastic polyolefin-based long fiber nonwoven fabric sheet of denier, wherein the lower layer (S1) and the upper layer (S2) are composed of polypropylene (PP) yarns alone or polyethylene (PE) yarns mixed, and the lower layer (S1) and The long-fiber nonwoven fabric sheet disposed as the upper layer (S2) has a thickness of 0.2 to 0.5 mm and a basis weight of 30 to 60 g/m2 and is made by joining by a heat embossing roll, and the upper layer (S2) has a plurality of continuous longitudinal or transverse layers. It forms a wave-shaped or straight fused portion 11 and a non-fused portion 12, and the fused portion 11 has a width of 0.5 to 1.5 mm and a spacing of 3 to 5 mm, and the bonding area formed in the nonwoven loop is the entire We have developed a long-fiber nonwoven loop for hook fastening members, which is characterized by 10 to 35% of the surface area.

Meanwhile, based on Patent No. 10-1839298, the present invention applied a heterogeneous cross-section spinning technology to strengthen the fastening force of the long fiber nonwoven fabric loop, which is polypropylene (polypropylene) forming a spunbond long fiber nonwoven loop for a hook fastening member. PP) A spun for hook fastening members using polypropylene irregular cross-section yarns, which not only ensures excellent fastening power with the hook by improving the performance of detachment and breathability as the filament is composed of irregular cross-section yarns, but also has good durability during repeated attachment and detachment. The present invention was completed by developing a bonded long-fiber nonwoven loop.

Republic of Korea Patent Publication No. 10-2006-0008831 (publication date: January 27, 2006) Republic of Korea Patent Publication No. 10-2010-0119107 (publication date: November 9, 2010) Republic of Korea Patent Publication No. 10-1839298 (announcement date: March 19, 2018)

The purpose of the present invention is to improve performance such as detachability and breathability by forming a spunbond long fiber nonwoven fabric loop for a hook fastening member used in infant/adult diapers, etc. using a polypropylene (PP) long fiber nonwoven fabric sheet composed of irregular cross-section yarns. The aim is to provide a spunbond long-fiber nonwoven fabric loop for a hook fastening member using polypropylene cross-section yarn that not only secures excellent fastening force with the hook but also has good durability during repeated attachment and detachment.

The present invention is a spunbond long fiber nonwoven fabric loop for a hook fastening member using polypropylene irregular cross-section yarn, and the spunbond long fiber nonwoven fabric loop 10 has a cross-sectional shape of flat (A), cross-shaped (B), and Ottogi-shaped ( It is made of a polypropylene (PP) long fiber nonwoven fabric sheet composed of one or more types of irregular cross-section yarns selected from C), square (D), and triangle (E), and the polypropylene (PP) long fiber nonwoven fabric sheet has a basis weight of 30 ~ It is a fibrous structure formed by self-bonding between fibers with a thickness of 60 g/m2 and a thickness of 0.2 to 0.5 mm, and the polypropylene (PP) long fiber nonwoven fabric sheet formed as above is passed through an embo roll to form a fusion portion (11). It is characterized in that it is joined by forming a non-fused portion (12).

According to a preferred embodiment of the present invention, the irregular cross-section yarns constituting the polypropylene (PP) long fiber nonwoven fabric sheet have an average aspect ratio of the irregular cross-section within 1:2 to 6, and the polypropylene (PP) long fiber nonwoven fabric sheet has an average aspect ratio of within 1:2 to 6. The nonwoven sheet is formed on a single-layer web (S) formed by distributing filaments with an average fineness of 4 to 7 denier, or a lower web (S1) with filaments of an average fineness of 1 to 3 denier distributed, with an average fineness of 1 to 3 denier. It is characterized as a multi-layer web (S2/S1) formed of an upper web (S2) in which filament yarns in the range of 4 to 7 denier are distributed.

In addition, the polypropylene (PP) long fiber nonwoven fabric sheet forms a plurality of wave-shaped or straight fused portions 11 and non-fused portions 12 continuous in the longitudinal or transverse direction by an emboss roll, and the fused portions (11) has a width of 0.5 to 1.5 mm and a spacing of 3 to 5 mm, and is characterized in that the bonding area formed on the nonwoven loop (10) is 10 to 35% of the total surface area.

The spunbond long fiber nonwoven fabric loop for a hook fastening member using polypropylene irregular cross-section yarn according to the present invention is composed of polypropylene (PP) filaments forming the long fiber nonwoven fabric sheet with irregular cross-section yarn applied with irregular cross-section spinning technology, thereby improving detachability and detachment. Performance such as breathability is improved, which not only ensures excellent fastening force with the hook, but also provides good durability during repeated attachment and detachment.

In addition, the long fiber nonwoven fabric loop for the hook fastening member is formed by forming a long fiber nonwoven fabric sheet of a single-layer web or a multi-layer web formed using spunbond nonwoven technology into a plurality of continuous waves in the longitudinal or transverse direction by embossing rolls. By forming and bonding a wave-shaped or straight fusion zone, manufacturing costs are reduced through a simple process system and there is an advantage of being environmentally friendly because a separate adhesive is not used.

Figure 1 is a perspective view showing a typical panty-type diaper.
Figure 2 is a configuration diagram showing a long fiber nonwoven fabric loop (multi-layer web) for a hook fastening member to which the irregular cross-section yarn according to the present invention is applied.
FIG. 3 is a cross-sectional view taken along line A-A' in FIG. 2.
Figure 4 is a schematic diagram of the process for manufacturing a long-fiber nonwoven loop (multi-layer web) for a hook fastening member using the irregular cross-section yarn according to the present invention.

Hereinafter, a long-fiber nonwoven fabric loop for a hook fastening member to which the irregular cross-section yarn according to the present invention is applied will be described with reference to the drawings, which allows a person skilled in the art to easily carry out the invention. It is intended to illustrate as much as possible, but does not mean that the technical idea and scope of the present invention is limited.

As shown in Figures 1 to 3, the present invention is a spunbond long fiber nonwoven fabric loop for a hook fastening member, and the spunbond long fiber nonwoven fabric loop 10 has a flat cross-sectional shape (A). , a polypropylene (PP) long fiber nonwoven fabric sheet composed of one or more different cross-section yarns selected from cross-shaped (B), Ottogi-shaped (C), square (D), and triangle (E), wherein the polypropylene ( PP) long fiber nonwoven sheet is a fiber structure formed by self-bonding between fibers with a basis weight of 30 ~ 60g/㎡ and a thickness of 0.2 ~ 0.5mm, and the polypropylene (PP) long fiber nonwoven fabric sheet formed as above is made by embossing roll (Embo) It is joined by passing it through a roll to form a fused portion 11 and a non-fused portion 12.

In general, nonwoven webs can be made by meltblowing, spunbonding, air-through bonding, hydroentangling, spunlacing, airlaying, It can be produced from a variety of forming processes such as carding and other suitable processes. The basis weight of the nonwoven web varies depending on the use of the web, and in most cases is about 300 g/m2 or less, and the basis weight is calculated as the weight of all layers per unit area of the nonwoven web.

The present invention uses spunbond nonwoven fabric manufacturing technology to improve the vertical peel strength and horizontal peel strength of the loop member. Typically, spunbond nonwoven fabric is used for melt extrusion of thermoplastic resin extrudates. It refers to a non-woven fabric formed from strands quenched and stretched by high-velocity air and collected on the surface, with the filaments later strengthened by the application of an embossed pattern with heat or pressure.

Since the spunbond nonwoven fabric manufacturing process involves continuous spinning web formation and web bonding processes, changes in each process condition require simultaneous changes in other related conditions. Therefore, since the technology to secure optimal conditions for each process is very important, each manufacturer's technological capabilities are being formed according to the accumulated know-how.

Accordingly, the spunbond long fiber nonwoven loop for hook fastening members of the present invention utilizes the low elongation and high strength characteristics of polypropylene (PP) long fibers, and is a spunbond long fiber nonwoven web with excellent mechanical properties. (web) is placed on a continuously driven conveyor belt to provide a single-layer web (S, not shown) or a multi-layer web (S2/S1) formed by a lower web (S1) and an upper web (S2) and heat embossed. Joined by rolls.

The present invention is a spunbond long fiber nonwoven fabric loop (10) using polypropylene irregular cross-section yarns, which does not form or join other types of melt-blown nonwoven fabrics or air-through bond nonwoven fabrics. Therefore, the adhesion between spunbond long fiber webs is strong and the manufacturing process is simple, making quality control and physical property control easy, which has the advantage of reducing production costs.

The spunbond long fiber nonwoven loop 10 is composed of one or more irregular cross-section yarns whose cross-sectional shape is selected from flat (A), cross-shaped (B), ottogi-shaped (C), square (D), and triangle (E). It is made of a polypropylene (PP) long-fiber nonwoven fabric sheet, and as in the step-by-step process shown in Figure 4, the irregular cross-section spinning technology brings about changes in physical properties depending on the nozzle, the characteristics of the melt, and spinning conditions, which are determined by the nozzle length and cross-section. As a technology implemented by controlling the shape, number of nozzles, nozzle arrangement, nozzle material, viscosity of the melt, surface tension, discharge amount, spinning temperature, cooling wind speed, fineness, etc., the present invention has been developed to adjust the overall process conditions through numerous trials and errors. By satisfying the requirements, the polypropylene long fiber irregular cross-section spinning technology was completed.

The filament (variable cross-section yarn) to which the above-mentioned irregular cross-section spinning technology is applied has an increased absorption effect due to the capillary phenomenon in the valley of the irregular cross-section and has a quick-drying function due to an increase in surface area. To date, it has been produced in triangular cross-section, square-faced, Y-shaped, and flat Different cross-section yarns such as PET are mainly being developed for outdoor use, but in the case of PP, PET, etc. Unlike other materials, it is difficult to form a high-quality irregular cross-section, so production as a product is very rare. Therefore, the cross-section of the actually designed and manufactured nozzle and the cross-section of the fiber manufactured through this nozzle depend on the nozzle, the nature of the melt, and spinning conditions. It depends on the cross-sectional irregularity.

The polypropylene (PP) spunbond long fiber nonwoven sheet is designed by changing the nozzle spacing to adjust the uniformity and density of the web, and has a cross-sectional shape of flat (A), cross-shaped (B), Ottogi-shaped (C), It is composed of one or more types of irregular cross-section yarns selected from square (D) and triangle (E), and is a fiber structure formed by self-bonding between fibers with a basis weight of 30 to 60 g/m2 and a thickness of 0.2 to 0.5 mm, as described above. The formed polypropylene (PP) long fiber nonwoven sheet is passed through an embo roll to form a fused portion 11 and a non-fused portion 12 and are joined.

It is preferable that the irregular cross-section yarns constituting the polypropylene (PP) long fiber nonwoven sheet have an average aspect ratio of 1:2 to 6. Depending on the shape, it can be classified into flat (A), cross (B), ottogi (C), square (D), and triangle (E), and as a result, the existing spunbond nozzle has a circular shape. Performance such as detachment and breathability has been improved compared to loop members using non-woven fabric manufacturing technology, which not only ensures excellent fastening force by improving vertical detachment (peel strength) and horizontal detachment (shear strength) from the hook, but also allows repeated detachment. The durability of the poem also shows good characteristics.

The polypropylene (PP) long fiber nonwoven fabric sheet has a single-layer web (S) formed by distributing filaments with an average fineness of 4 to 7 denier, or a lower part with filaments of an average fineness of 1 to 3 denier distributed. Excellent fastening force and repeatability with the hook 20 are achieved by selectively using a multi-layer web (S2/S1) formed on the web (S1) with an upper web (S2) in which filament yarns with an average fineness in the range of 4 to 7 denier are distributed. Good durability during attachment and detachment can be achieved.

The polypropylene (PP) long fiber nonwoven fabric sheet formed of the multi-layer web (S2/S1) has a fastening force due to the upper web (S2) distributed with filaments having an average fineness of 4 to 7 denier in the single-layer web (S). Not only can it be implemented to an equivalent degree, but the bulkiness and breathability are somewhat reduced due to the lower web (S1) distributed with filaments with an average fineness of 1 to 3 denier formed underneath, but a more dense loop member can be formed. This improves durability during repeated attachment and detachment.

At this time, the upper web (S2) of the single-layer web (S) and the double-layer web (S2/S1) can be divided by fineness and mixed at 10 to 50% by weight each to form filaments with an average fineness in the range of 4 to 7 denier. (For example, 20% of 4 denier, 30% of 5 denier, 30% of 6 denier, 20% of 7 denier). In addition, the lower web (S1) of the double layer web (S2/S1) is also classified by fineness and weighs 10 to 50 each. By mixing by percentage, filaments with an average fineness ranging from 1 to 3 denier can be formed (for example, 25% for 1 denier, 50% for 2 denier, and 25% for 3 denier). As a result, the polypropylene (PP) long-fiber nonwoven sheet maintains uniform web uniformity and secures the appropriate density of the web, and the bonding of the long-fiber nonwoven loops to which the irregular cross-section yarn is applied is strengthened, making it easier to detach and detach repeatedly. It is more advantageous in strengthening durability.

[Table 1] below shows the results of five types of irregular cross-section yarns and circular cross-section yarns spun under various SEM (Scanning Electron Microscope) conditions in order to establish the optimal spinning conditions for the polypropylene long fiber irregular cross-section yarns. Afterwards, the state of the cross section was observed (X150).

Cross-sectional shape Section state 1 Section state 2 flat type
(A) crucifixion
(B) Ottogi type
(C) Square
(D) triangle
(E) circle
(O)

Next, in the present invention, the cross-sectional shape is 100% made of one or more types of irregular cross-section yarns selected from flat (A), cross-shaped (B), ottogi-shaped (C), square (D), and triangle (E). Polypropylene (PP) long fiber nonwoven sheets are thermally bonded to provide mechanical properties and dimensional stability. That is, the polypropylene (PP) long fiber nonwoven sheet is subjected to heat and pressure through a heat calender roll to produce a nonwoven fabric loop with a fused portion 11, and the fused portion 11 is formed on the upper part of the web. The forming calendar roll is an embossed roll with a pattern having a plurality of wave-shaped or straight convex portions continuous in the longitudinal or transverse direction, and the roll in contact with the lower part of the web is composed of a flat roll with a smooth surface.

If the temperature of the calender roll exceeds a certain level, the sheet is heat-sealed to the heated roll, making sheet production impossible. If the temperature is too low, the physical properties of the sheet deteriorate, so the thermal temperature of the calender roll is determined by considering the melting point of the resin. The surface temperature of the roll is preferably around 130 to 165°C.

In addition, the longitudinal direction used in this specification refers to the machine direction (MD), meaning the moving direction of the machine, and the horizontal direction refers to the cross-machine direction (CD). It refers to the direction perpendicular to the direction of movement of the machine.

As above, the polypropylene (PP) long-fiber nonwoven fabric sheet forms a plurality of wave-shaped or straight fusion portions 11 and non-fusion portions 12 continuous in the longitudinal or transverse direction by an embossing roll, and the fusion The portion 11 has a width of 0.5 to 1.5 mm and an interval of 3 to 5 mm, and the bonding area formed on the nonwoven loop 10 is set in the range of 10 to 35% based on the total surface area, so that the lower layer (S1) and the upper layer ( It was confirmed that S2) can secure sufficient adhesion to each other and that the surface area of the non-fused portion 12, which is reduced due to the fused portion 11 created in the nonwoven loop 10, can be ensured to an appropriate range.

Accordingly, the non-woven loop 10 of the present invention does not reduce the mechanical bonding strength with the hook member, does not cause separation between the lower layer (S1) and the upper layer (S2), and generates little lint even when used repeatedly for a long time, and is Even when connected to a hook member used as a hook member, the vertical peel strength is maintained at more than 1.0N/inch and the horizontal peel strength (shear strength) is maintained at more than 35N/inch, showing superior performance compared to existing products.

As discussed above, the present invention was completed through numerous experiments. However, the present invention will be described below through preferred embodiments that can be easily understood and implemented by those skilled in the art.

[Example]

Five types of irregular cross-section yarns such as flat (A), cross-shaped (B), Ottogi-shaped (C), square (D), and triangle (E) and circular cross-section yarn (O) made by applying polypropylene resin with irregular cross-section spinning technology. A long fiber nonwoven fabric sheet with a width of 1000 mm was manufactured by adjusting the basis weight to 30 to 60 gsm, respectively.

Here, the long-fiber nonwoven fabric sheet formed as a single-layer web (S) is formed by melt-spinning polypropylene resin and mixing it by fineness to distribute it into filaments with an average fineness of 5.5 denier, and is also formed as a double-layer web (S2/S1). The long-fiber nonwoven fabric sheet is made by melt-spinning polypropylene resin and mixing it by fineness to form an upper web (S2) distributed with filaments with an average fineness of 5.5 denier as above on a lower web (S1) distributed with filaments with an average fineness of 2 denier. formed.

The long fiber nonwoven fabric sheet was supplied to a heat embossing roll with a wave pattern formed on the upper roll to produce a bonded long fiber nonwoven fabric loop with a basis weight of 30 to 60 g/m2 and a thickness of 0.2 to 0.5 mm. The long fiber nonwoven fabric manufactured in this way was The loop is formed continuously in the longitudinal direction by a heat embossing roll, and the width of the fusion zone is set to 1.0 mm, and the gap between the fusion zones is set to about 4 mm. The bonded area formed in the nonwoven loop is about 20% of the total surface area and is non-fused. The wealth was formed at approximately 80%.

The types of long fiber nonwoven fabric loops with different basis weight, thickness, and fineness using the long fiber nonwoven fabric sheet are shown in [Table 2] below.

- Basis weight: KS K 0514 [Method of measuring cloth mass: Small test piece method - Mass of test piece (g)/Area of test piece (㎠) × 10000]

- Thickness: KS K ISO 9073 [Textile-Nonwoven Fabric Test Method-Part 2 Thickness Measurement]

division Example 1
(A) Example 2
(B) Example 3
(C) Example 4
(D) Example 5
(E) Comparative example
(O) Basis weight (g/㎡) 30 40 45 50 60 45 Thickness (㎜) 0.2 0.3 0.35 0.4 0.5 0.35 single layer web S(d) 4 to 7 4 to 7 4 to 7 4 to 7 4 to 7 4 to 7 double layer web S2(d) 4 to 7 4 to 7 4 to 7 4 to 7 4 to 7 4 to 7 S1(d) 1 to 3 1 to 3 1 to 3 1 to 3 1 to 3 1 to 3

[Experimental example]

Peel strength, shear strength, air permeability, etc. of the long fiber nonwoven fabric loops according to the above examples and comparative examples were measured in the following manner, and the average values of the experimental results for the performance indicators are shown in [Table 3] below.

- Peel strength: LK-QC-T001 Peel strength [Measuring detachment force by applying force in a 180-degree direction between the loop and hook to open the space between the two]

- Shear strength: LK-QC-T002 Tensile shear strength [Measuring detachment force by applying force in a straight line to the loop and hook]

- Breathability: KS K ISO 9237 [Textile-Method of measuring air permeability of fabric-Air flow speed flowing vertically through a test piece under conditions of certain area, pressure, and time]

performance indicators Example 1 Example 2 Example 3 Example 4 Example 5 Comparative example Peel strength (N/inch) 2.5 2.7 2.8 3.0 3.2 2.3 Shear strength (N/inch) 45 52 58 60 64 48 Air permeability (cfm) 390 370 350 320 310 300

As shown in [Table 3] above, when comparing the experimental results of Examples 1 to 5 and Comparative Examples, all of the Examples were superior to the Comparative Example in peel strength and shear strength, and in particular, Example 3 was superior to the Comparative Example. Although it has a similar volume and density, it was found to be superior in strength by about 20% or more, and in addition, the air permeability in the examples was overall maintained below 400, confirming that the final development goal was achieved. Also, compared to Example 1, in the case of Example 5, it can be seen that the density increases as the basis weight of the nonwoven fabric increases, so the breathability decreases somewhat, but the peel strength and shear strength improve.

In addition, as a result of measuring safety in accordance with the Common Safety Standard for Children's Products No. 2017-0118, chlorophenols were less than 0.5 mg/kg [KS K 0733] and phthalates were less than 0.1% [gas chromatography mass spectrometry]. (GC-MS) method], formaldehydes less than 20 mg/kg [KS K ISO 14184-1], heavy metals less than 0.1 mg/kg, no volatile organic compounds (VOCs) detected, etc. All measurement items It was confirmed that it was within the standard value.

Therefore, the spunbond long-fiber nonwoven fabric loop for a hook fastening member using polypropylene irregular cross-section yarn according to the present invention has higher vertical peel strength and horizontal detachment strength (shear strength) than the existing embossed nonwoven fabric even when repeatedly detached from the hook member. ) has been improved to provide excellent mechanical bonding and greatly reduced lint generation, and it is a loop member that can be manufactured at a very low cost. It exhibits significantly improved quality and safer characteristics than existing non-woven loops, making it suitable for use in disposable diapers as well as adults. and disposable products such as children's personal wear, personal hygiene materials, clothing, bags, sporting goods, protective clothing, bed covers, or surgical gowns, etc., can be used in a variety of purposes and forms without departing from the technical spirit of the present invention. there is.

10: Spunbond long fiber non-woven fabric loop
20: Hook
S1: Under-web
S2: Upper-web
11: Fusion portion
12: Non-fused portion

Claims (5)

In the spunbond long fiber nonwoven loop (10) for hook fastening member,
The spunbond long fiber nonwoven loop is polypropylene composed of one or more irregular cross-section yarns whose cross-sectional shape is selected from flat (A), cross-shaped (B), Ottogi-shaped (C), square (D), and triangle (E). (PP) Made of long fiber non-woven sheet,
The polypropylene (PP) long fiber nonwoven sheet is a fiber structure formed by self-bonding between fibers with a basis weight of 30 to 60 g/m2 and a thickness of 0.2 to 0.5 mm,
The polypropylene (PP) long fiber nonwoven fabric sheet formed as described above is passed through an embo roll to form a fused portion 11 and a non-fused portion 12, thereby forming a polypropylene irregular cross-section yarn. Spunbond long fiber non-woven loop for applied hook fastening member. According to paragraph 1,
A spunbond sheet for a hook fastening member using a polypropylene irregular cross-section yarn, characterized in that the irregular cross-section yarn constituting the polypropylene (PP) long fiber nonwoven fabric sheet has an average aspect ratio of within 1: 2 to 6. Textile non-woven loop. According to paragraph 1,
The polypropylene (PP) long fiber nonwoven sheet is a spunbond for hook fastening member using polypropylene irregular cross-section yarn, characterized in that it is a single-layer web (S) formed by distributing filaments with an average fineness in the range of 4 to 7 denier. Long fiber non-woven loop. According to paragraph 1,
The polypropylene (PP) long fiber nonwoven fabric sheet has an upper web with filament yarns with an average fineness of 4 to 7 denier distributed on a lower web (S1) on which filaments with an average fineness of 1 to 3 denier are distributed. A spunbond long fiber nonwoven fabric loop for a hook fastening member using a polypropylene irregular cross-section yarn, characterized in that it is a multi-layer web (S2/S1) formed of (S2). According to any one of claims 1 to 4,
The polypropylene (PP) long-fiber nonwoven fabric sheet forms a plurality of wave-shaped or straight fused portions 11 and non-fused portions 12 continuous in the longitudinal or transverse direction by an emboss roll, and the fused portion 11 ) is 0.5 to 1.5 mm wide and 3 to 5 mm apart, for a hook fastening member using polypropylene irregular cross-section yarn, characterized in that the joint area formed on the nonwoven loop 10 is 10 to 35% based on the total surface area. Spunbond long fiber nonwoven loop.