KR102249579B1 - Long fiber non-woven fabric loop for a multi-hook type fastener - Google Patents

Abstract

The present invention relates to a long-fiber non-woven fabric loop for a multi-hook type fastener, and to a non-woven fabric loop made of multi-layered spunbond long fiber non-woven sheets. In the non-woven fabric loop, a lower web (S1) is formed of a thermoplastic polyolefin-based long-fiber non-woven fabric sheet with a fineness of 1-2 deniers, an upper web (S2) is formed of a thermoplastic polyolefin-based long-fiber non-woven fabric sheet obtained by mixing and spinning raw yarn with a fineness of 3-5 deniers and raw yarn with a fineness of 6-8 deniers at a ratio of 1 : 0.5-2, and the long-fiber non-woven fabric sheets laminated as the lower web (S1) and the upper layer web (S2) are bonded by a heat embossing roll. In the long-fiber non-woven fabric loop for a multi-hook type fastener according to the present invention, the lower web, serving as a support layer, is formed by using a long-fiber non-woven sheet made of fibers of low fineness so as to have increased density and decreased air permeability, such that position adjustment (positioning) can be easily conducted when manufacturing a final product by transferring the non-woven loop by vacuum suction; and the upper web, which acts as a bonding layer with a hook, is formed by using a long-fiber non-woven sheet made of fibers of higher fineness so as to have excellent attachment and detachment force, thereby exhibiting not only excellent fastening force with a hook but also excellent durability during repeated attachment and detachment. In addition, in the long-fiber non-woven fabric loop for a multi-hook type fastener according to the present invention, the upper web is formed of a long-fiber non-woven sheet obtained by mixing and spinning yarn of different fineness such that the upper web is hooked and coupled to face various kinds of hooks. Accordingly, the coupling is prevented from being easily separated by such mechanical coupling force.

Description

Long fiber nonwoven loop for multiple hook fastening members {LONG FIBER NON-WOVEN FABRIC LOOP FOR A MULTI-HOOK TYPE FASTENER}

The present invention relates to a long fiber nonwoven fabric loop for a multi-hook fastening member, and more particularly, a multilayer spunbond long fiber nonwoven fabric sheet in which the upper web is formed with a higher fineness than the lower web is fused by a thermal emboss roll. Various disposable products, including diapers and bedding, which are used by bonding them are economical to manufacture and have excellent performance such as desorption and air permeability, and the upper web is a long-fiber nonwoven sheet made by mixing and spinning yarns of different fineness. It relates to a long fiber nonwoven loop for a multi-hook fastening member capable of securing a coupling force with various types of hooks by being formed.

In general, as a bonding material for disposable products such as a bed cover or surgical gown, including infant diapers and adult diapers, it is possible to form a mechanical bond with a hook member, and it is easy to detach, easy to manufacture, and inexpensive. ) Non-woven fabrics have been mainly used.

In these disposable products, the Hook & Loop Fastener for wearing them has a function that allows hooks and hooks to be attached to each other in pairs, so they are often used to fasten clothes or shoes. , It is commonly known as'velcro' or'velcro' after the brand name. Among them, the loop fastener is usually produced by laminating a film on a nonwoven fabric or a nonwoven fabric, and the laminated body with the nonwoven fabric and film is also used for manufacturing disposable products such as diapers.

The hook member has an arch shape, a mushroom shape, a hook shape, and the like, and is manufactured so that the hook member can be hung facing the roof member to be well aligned, and this mechanical coupling prevents each component from being easily separated. That is, the portion where the hook member and the loop member are fastened has a shear strength (horizontal detachment force) that is parallel to the peel strength (vertical detachment force) that is perpendicular to the surface, so that normal bonding can be maintained during use. A degree of adhesion is required.

On the other hand, conventionally, in the manufacturing process of the nonwoven fabric used for the roof member, the nonwoven fabrics or films are laminated together by adhesive or thermal bonding through a process of weaving a fabric or a process of perforating the nonwoven fabric. Since the process is separated, there is a problem in that productivity is low as well as cost is high, and if the produced product is preserved in a roll form, there is a disadvantage in that the volume feel is deteriorated and the softness feel is deteriorated by punching by heat.

To compensate for these shortcomings, some nonwoven fibers are transferred by a pair of uneven rollers to form a wave shape (bent or mound), and then a thermoplastic resin film is formed by a conventional T-DIE in which the resin is extruded from one side. Although there is a method of bonding, this is because a single resin film is bonded to one side of the nonwoven fabric and has extremely limited uses that can only be used for loop fasteners. A laminated sheet having a structure in which a formed corrugated loop is formed is mainly used.

The nonwoven fabric of the loop system as described above is mainly used as a fastener for personal hygiene materials or disposable products such as clothing, bags, sports goods, protective clothing, and personal wear for adults and infants. Since it is used for the purpose, it is becoming a core technology to lower the overall material cost and minimize the manufacturing cost in terms of product design. Along with this, not only should it be easy to detach and use repeatedly, but it should also have stable bonding performance and excellent peeling properties.

However, when the loop nonwoven fabric manufactured by the conventional method is combined with a hook member and repeatedly used, there is a disadvantage in that there is a lot of fluffing and does not have a stable binding force due to the corrugated loop made up of top and bottom. In addition, since excessive corrugated loops are formed on the nonwoven fabric, it is difficult to bond with other nonwoven fabrics or film layers, and if this is used as a material that directly contacts the human body, the smooth and soft texture on the surface of the nonwoven fabric is poor, causing damage to the skin. In addition to the risk of causing a problem, there is a disadvantage of causing an obstacle as the breathability is excessively deteriorated.

As such, in the field of disposable hygiene products and protective products, there is still a need for a roof system capable of improving overall performance such as softness and breathability, as well as reinforcing the mechanical coupling system and low cost for the loop nonwoven fabric. to be.

Looking at a representative conventional technique for improving the above problems, Korean Patent Laid-Open No. 10-2006-0008831 (Hanjin P&C Co., Ltd.) measures the fiber density of the outer surface of the protrusion formed by heating and pressing the nonwoven fabric or punching the nonwoven fabric while heating and pressing it. In order to provide a roof sheet for bonding in which a nonwoven fiber roof layer is formed by reducing, a loop protrusion protruding from the surface of the nonwoven fabric and corresponding to the bonding hook; The fiber density of the loop protrusions having a lower density than that of the nonwoven fabric floor; A non-woven fabric roof sheet for adhesion consisting of a bonding surface formed on a projection corresponding to the preliminary line of a hook tape for adhesion. It has good adhesion and adhesion stability to the hook tape for adhesion, and almost no loss of adhesion even during repeated adhesion. Although disclosed, there is a difficulty in the process to reduce the fiber density of the outer surface of the protrusion.

In addition, Korean Patent Publication No. 10-2010-0119107 (Shinwoo P&C Co., Ltd.) is to provide a method for manufacturing a loop tape of a hook-loop fastening system having good bonding strength such as peel strength and excellent ventilation and excellent ventilation, and a loop tape formed therefrom, ( a) a paper structure 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 melting point higher than the melting point of the first thermoplastic polymer or a high decomposition temperature, and the Loop tissue including a plurality of loops formed by being fixed to the paper tissue; And (b) a nonwoven fabric made of a third fiber comprising a third thermoplastic polymer that is laminated on the lower surface of the loop structure and has a melting point lower than the melting point or decomposition temperature of the second polymer, wherein the paper structure and the nonwoven fabric are The first fiber and the third fiber are thermally bonded to each other by melting.

In addition, in Patent No. 10-1212426 (Toray Advanced Materials Co., Ltd.), a spunbond nonwoven fabric is used as the outermost layer, and the inner layer has at least one meltblown nonwoven fabric layer, and at least one spunbond nonwoven fabric layer and melt blown In the method of manufacturing a spunbond multilayer nonwoven fabric comprising an additionally laminated nonwoven fabric layer, the spunbond nonwoven fabric layer constituting the outermost layer is composed of a core-sheath type long fiber in which a low melting point polymer wraps a high melting point polymer in the longitudinal direction of the fiber, and , A melt-blown non-woven fabric layer is formed between the spunbond non-woven fabric layers composed of the core sheath-type long fibers, laminated on a continuous belt to form a web, and bonded with a calender capable of thermal compression to form a sheet, and then suction type. A method of manufacturing a composite spunbond long fiber multilayer nonwoven fabric, characterized in that it is manufactured by heat treatment with a drum at a heat treatment temperature of 80 to 110°C, is described.

In addition, Patent No. 10-1319183 (Toray Advanced Materials Co., Ltd.) also has a spunbond nonwoven fabric as the outermost layer and one meltblown nonwoven fabric layer as the inner layer, and at least one spunbond nonwoven fabric layer and melt blown nonwoven fabric as necessary. In the manufacturing method of a spunbond multilayer nonwoven fabric in which a layer may be additionally stacked or a melt blown layer may not be stacked, a distribution plate is placed between the spin beam and the spinning nozzle to surround the core portion in the longitudinal direction. A high-melting-point polymer or propylene polymer in the core portion, and a low-melting point polymer or ethylene-based polymer in the sheath portion are directed toward each nozzle hole to produce a core-sheath type composite filament, and the spun composite sheet An air jetting device that facilitates separation of the fibrous web and the belt by laminating fibers on a porous continuous belt for easy separation of the fibrous web and the belt to form a web of conjugated filaments, and the composite filamentous web It is characterized in that it consists of a step of manufacturing by heat-treating and winding a sheet form fixed by an embossing bond by partially thermocompression bonding with a suction drum.

On the other hand, the applicant of the present invention through Patent No. 10-1839298 (Rak Industries, Inc.), the lower layer (S1) is a thermoplastic polyolefin-based long fiber nonwoven sheet having a fineness of 1 to 2 denier, the upper layer (S2) is a fineness of 4 to 6 As a denier (denier) thermoplastic polyolefin-based long fiber nonwoven fabric sheet, the upper layer (S2) is a hook formed with a plurality of corrugated or straight fused portions 11 and non-fused portions 12 continuous in a longitudinal or transverse direction Although a long-fiber nonwoven loop for fastening members has been developed, in the present invention, a multi-hook fastening member to prevent easy separation by hooking to face various types of hooks based on this, and this mechanical bonding force The present invention was completed by developing a long fiber nonwoven loop.

Republic of Korea Patent Publication No. 10-2006-0008831 (published on January 27, 2006) Republic of Korea Patent Publication No. 10-2010-0119107 (published on November 9, 2010) Republic of Korea Patent Publication No. 10-1212426 (announcement date December 13, 2012) Republic of Korea Patent Publication No. 10-1319183 (announced date 2013 October 18) Republic of Korea Patent Publication No. 10-1839298 (announcement date March 19, 2018)

An object of the present invention is to reduce the manufacturing cost according to a simple process system by bonding a multi-layer spunbond long fiber nonwoven fabric sheet with a thermal emboss roll, and to make the lower layer web acting as a support layer into fibers of low fineness. As the long fiber nonwoven sheet is used, the density increases and the air permeability decreases, so the position control (positioning) is easy when the final product is manufactured by transferring the nonwoven loop by vacuum adsorption, and the upper layer web is made of fibers of higher fineness. By using a long fiber nonwoven sheet, the detachment power is improved to provide a long fiber nonwoven loop for multiple hook fastening members.

Another object of the present invention is to form an upper web with higher fineness than a lower web into a long fiber nonwoven sheet obtained by mixing and spinning yarns with different fineness, so that it is hung opposite to various types of hooks and can be joined without being easily separated. It is to provide a long fiber nonwoven loop for the member.

The long fiber nonwoven fabric loop for a multi-hook fastening member of the present invention is a nonwoven fabric loop made of a multi-layer spunbond long fiber nonwoven fabric sheet, wherein the lower layer web S1 is a thermoplastic polyolefin type having a fineness of 1 to 2 denier. It is formed of a long-fiber nonwoven sheet, and the upper web (S2) is a thermoplastic polyolefin-based blended yarn with a fineness of 3 to 5 denier and a fineness of 6 to 8 denier in a ratio of 1: 0.5 to 2 It is formed of a long fiber nonwoven sheet, characterized in that the laminated long fiber nonwoven sheet laminated with the lower web (S1) and the upper web (S2) is bonded by a thermal emboss roll.

According to a preferred embodiment of the present invention, the lower layer web (S1) and the upper layer web (S2) are thermoplastic polyolefin-based long fiber nonwoven sheets obtained by mixing polypropylene (PP) yarns alone or polyethylene (PE) yarns, and the thermal embossing The upper web (S2) bonded by a roll forms a fused portion 11 and a non-fused portion 12 of a plurality of wavy, straight or circular patterns continuous in a longitudinal direction or a transverse direction, and the fused portion 11 Is set to a width of 0.5 to 1.5 mm and an interval of 1 to 5 mm, and the bonding area formed on the nonwoven loop is 10 to 35% based on the total surface area, and the lower web (S1) and the upper web (S2) The nonwoven sheet bonded with) is formed in the range of 0.08 to 0.5 mm in thickness and 10 to 60 g/m 2 in basis weight.

In the long fiber nonwoven fabric loop for a multi-hook fastening member according to the present invention, the lower layer web acting as a support layer increases the density and lowers the air permeability by using a long fiber nonwoven fabric sheet made of low fineness fibers, so that the nonwoven fabric loop is transferred by vacuum adsorption Therefore, it is easy to position control (positioning) when manufacturing the final product, and the upper web, which acts as a bonding layer with the hook, uses a long-fiber nonwoven sheet made of fibers of higher fineness, so it has excellent detachability and As well as strong fastening force, there is an effect of excellent durability during repeated detachment.

In addition, the long fiber nonwoven fabric loop for a multi-hook fastening member according to the present invention is formed of a long fiber nonwoven fabric sheet obtained by mixing and spinning yarns with different fineness as the upper web, so that it can be well coupled by being caught facing various types of hooks, There is an effect of preventing easy separation by this mechanical bonding force.

1 is a perspective view showing a state in which a long fiber nonwoven fabric loop according to the present invention is attached to a chirp.
2 is a block diagram showing a long fiber nonwoven loop according to the present invention.
3 is a cross-sectional view taken along line A-A' in FIG. 2.
4 is a block diagram showing a spinneret nozzle for manufacturing an upper layer web of a long fiber nonwoven loop of the present invention [Type A, Type B].

Hereinafter, with reference to the drawings will be described with respect to the long-fiber nonwoven fabric loop for a multi-hook fastening member according to the present invention, which is enough to allow a person of ordinary skill in the art to easily carry out the invention. It is for illustrative purposes only, and this does not mean that the technical spirit and scope of the present invention are limited.

1 to 3, the long fiber nonwoven fabric for a multi-hook fastening member according to the present invention is a nonwoven fabric loop 10 made of a multilayer spunbond long fiber nonwoven fabric sheet, and the lower layer web S1 is It is a thermoplastic polyolefin-based long fiber nonwoven sheet with fineness of 1 to 2 denier, and the upper web (S2) is made of yarn with a fineness of 3 to 5 denier and yarn with a fineness of 6 to 8 denier of 1: 0.5 to It is made of a thermoplastic polyolefin-based long fiber nonwoven fabric sheet mixed and spun at a ratio of 2, and the long fiber nonwoven fabric sheet laminated with the lower web (S1) and the upper web (S2) is joined by a thermal emboss roll.

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

The present invention is to improve the detachment power of the roof member using a spunbond nonwoven fabric manufacturing technology. Typically, the spunbond nonwoven fabric is formed into strands quenched and stretched by high-speed air by melt extrusion of a thermoplastic resin extrudate. It means a non-woven fabric which is collected on the surface and reinforced with filaments bonded by application of an embossed pattern with heat or pressure.

That is, the present invention is a nonwoven fabric loop bonded by laminating a spunbond long fiber nonwoven fabric sheet with a multilayer web (S1\S2), and a lower layer web on a conveyor belt continuously driven to provide a multilayer nonwoven fabric with excellent mechanical properties. (S1) and a spunbond long fiber nonwoven web arranged as an upper layer web (S2) are laminated and bonded by thermal embossing rolls.Other types of melt-blown nonwovens or air through bonds -Through bond) Since the nonwoven fabric is not formed or bonded, the adhesion between the spunbond long fiber web formed of the lower web (S1) and the upper web (S2) is strong, and the manufacturing process is simple, so quality control and property control are easy. Therefore, it has the advantage of reducing production cost.

The laminated nonwoven fabric as described above is thermally bonded to impart mechanical properties and shape stability. In other words, heat and pressure are applied through a heat calender roll to form a sheet through thermal bonding. The fusion portion 11 is formed on the upper web (S2) by the convex portion of the calender roll to be joined to the lower web (S1), and the calender roll forming the fusion portion (11) on the upper web (S2) is in the longitudinal direction. Alternatively, it is an emboss roll of a pattern having a convex portion continuous in the transverse direction, and the roll in contact with the lower layer web S1 is composed of a flat roll having a smooth surface.

At this time, if the temperature of the calender roll exceeds a certain level, the sheet is thermally fused to the heated roll and sheet production is impossible. If the temperature is too low, the physical properties of the sheet are degraded, so the thermal temperature of the calender roll takes into account the melting point of the resin. Therefore, the surface temperature of the roll is preferably about 130 ~ 165 ℃.

In the present invention, the term "longitudinal direction" refers to the machine direction (MD) and refers to the direction of movement of the machine, and the term "transverse direction" refers to the cross-machine direction (CD). It means the direction orthogonal to the moving direction of the machine.

Accordingly, in the present invention, the lower layer web (S1) acting as a support layer with the substrate increases the density and lowers the air permeability by using the long fiber nonwoven fabric sheet made of low fineness fibers, so that the final product assembly process using this roof member The fact that the upper web (S2), which acts as a bonding layer with the hook, uses a long-fiber nonwoven sheet made of fibers of higher fineness, so that the strong bonding strength with the hook as well as the durability during repeated detachment are excellent. Is based on

However, commercially available hooks are difficult to secure a strong fastening force with the loop depending on the size and shape of the hook member, so the upper web (S2) acting as a bonding layer with the hook is used as a fiber of higher fineness than the lower web (S1). However, the focus was on the fact that by forming a long-fiber nonwoven sheet formed by mixing and spinning yarns of different finenesses, it is possible to fasten it well by hanging it face to face with various types of hooks, and to prevent it from being easily separated by this mechanical bonding force. .

In the present invention, through the development of spinning and web manufacturing technology, the lower layer web (S1) is formed of a thermoplastic polyolefin-based long fiber nonwoven sheet having a fineness of 1 to 2 denier, and the upper layer web (S2) has a fineness of 3 to It is formed of a thermoplastic polyolefin-based long fiber nonwoven sheet obtained by mixing and spinning 5 denier yarns and fineness 6 to 8 denier yarns in a ratio of 1: 0.5 to 2, and the lower layer web (S1) and the upper layer web As (S2) is heat-sealed and bonded by an emboss roll, the adhesion between spunbond long fiber webs is stronger than that between dissimilar materials, and the manufacturing process is simple, so quality control and physical property control are easy, so production cost is reduced.

The thermoplastic polyolefin-based long fiber nonwoven fabric sheet forming the upper web (S2) has a fineness of 3 to 5 denier through a spinneret nozzle design for mixing and spinning yarns having different fineness as shown in FIG. 4, for example. ) And fineness of 6 to 8 denier (denier) yarn is uniformly mixed to obtain a nonwoven web, the lower layer web (S1) and the upper layer web (S2) is a polypropylene (PP) yarn alone or polyethylene (PE ) As a thermoplastic polyolefin-based long fiber nonwoven fabric sheet mixed with yarn, it is possible to supplement the flexible properties by mixing polyethylene (PE) long fibers while basically using the low elongation and high strength characteristics of polypropylene (PP) long fibers. .

For reference, denier (D) is a unit that indicates the fineness of fibers or yarns, and the weight of 9,000m fibers or yarns is expressed in grams. It is known to be about 0.0124716301 cm in diameter. This is because the fiber thickness of the spunbond long fiber nonwoven fabric commonly used as a loop is 2.5 denier or less, and can have the flexibility of the nonwoven fabric in such fineness. Meanwhile, the fibers forming the melt-blown nonwoven fabric have a thickness of 0.1 to 0.5 denier. The reason is that when the thickness of the fiber becomes thick, there is a disadvantage of lowering the strength and touch.

However, in the present invention, through the development of spinning and web manufacturing technology, the lower layer (S1) is formed of a thermoplastic polyolefin-based long fiber nonwoven sheet having a fineness of 1 to 2 denier, and the upper layer (S2) has a fineness of 3 to 5 It is formed of a thermoplastic polyolefin-based long fiber nonwoven fabric sheet obtained by mixing and spinning denier and fineness yarns of 6 to 8 denier, and the lower layer (S1) and the upper layer (S2) are thermally fused and bonded by an emboroll. Accordingly, the adhesion between the spunbond long fiber webs is stronger than that between different materials and the manufacturing process is simple, so quality control and property control are easy, so production cost is reduced.

As above, the upper layer (S2) bonded to the lower layer (S1) by the thermal emboss roll is a fused portion 11 and a non-fused portion in a pattern such as a plurality of waveforms, straight lines, circles, etc. 12 is formed, and the fusion portion 11 has a width of 0.5 to 1.5 mm and an interval of 1 to 5 mm, and the bonding area formed on the nonwoven loop is set in the range of 10 to 35% based on the total surface area. The lower web (S1) and the upper web (S2) can secure sufficient adhesion to each other, and the surface area of the non-fused part 12 reduced due to the fused part 11 generated in the nonwoven loop 10 is within a suitable range. It was confirmed that it can be guaranteed.

Accordingly, in the nonwoven fabric loop 10 of the present invention, the mechanical bonding force with the hook member is not lowered, and there is no separation phenomenon between the lower layer (S1) and the upper layer (S2), and even when repeatedly used for a long time, lint is hardly generated. Even when it is bonded to a hook member that is used as a device, it exhibits superior performance compared to existing products by maintaining a vertical detachment force (peel strength) of 2.4 ~ 4.3N/inch and a horizontal detachment force (shear strength) of 38N to 65N/inch. .

In addition, in the present invention, the nonwoven fabric sheet bonded with the lower web (S1) and the upper web (S2) is formed with a thickness of 0.08 to 0.5 mm and a basis weight of 10 to 60 g/m2 and has good detachability from the hook member and the surface of the nonwoven fabric sheet. It was confirmed that the soft texture of the fabric was excellent, and it was investigated that the nonwoven roof layer 10 is not only economical when manufacturing various disposable products, but also rarely causes lint even if it is repeatedly used for a long time. Became. The lower layer (S1) and the upper layer (S2) are made of a polypropylene (PP) yarn alone or a long-fiber nonwoven sheet made of a thermoplastic polyolefin-based resin mixed with polyethylene (PE) yarn, thereby forming a roof member suitable for the characteristics of the product. Of course it can be produced.

As described above, the present invention has been completed through numerous experiments, but hereinafter, the present invention will be described through preferred embodiments capable of being easily understood and implemented by those skilled in the art.

[Examples 1 to 6]

Polypropylene resin was melt-spun to prepare a long-fiber nonwoven sheet of a lower layer web (S1) formed with a fineness of 1 to 2D and an upper layer web (S2) in which 3 to 5D and 6 to 8D were mixed in a ratio of 1: 1. (Width: 1000 mm), the lower layer web (S1) and upper layer web (S2) sheets are supplied to a thermal emboss roll in which a corrugated pattern is formed on the upper roll and bonded with a thickness of 0.08 to 0.48 mm and a basis weight of 10 to 60 g/m2. A long fiber nonwoven loop was prepared. The width of the fusion part formed continuously in the longitudinal direction on the upper web (S2) by the emboss roll is set to 1.0 mm, and the gap between the fusion parts is set to 4 mm, so that the bonding area formed on the nonwoven fabric loop is approximately based on the total surface area. It is about 20%, and about 80% of the non-fused part. The nonwoven fabric loops having different fineness of the long fiber nonwoven fabric sheet forming the lower web (S1) and the upper web (S2) were mixed as shown in [Table 1] below.

division Example 1 Example 2 Example 3 Example 4 Example 5 Example 6 S2 3D/6D 4D/7D 4D/7D 4D/7D 4D/7D 5D/8D S1 1.0D 1.3D 1.5D 1.7D 1.8D 2D

[Experimental Example]

For the products according to Examples 1 to 6, basis weight, thickness, peel strength, shear strength, air permeability, etc. were measured in the following manner, and the average values of the experimental results for the performance indicators are shown in [Table 2] below. .

-Basis weight: KS K 0514 [Method of measuring the mass of fabric: 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]

-Peel strength: LK-QC-T001 peel strength [Measure detachment force while opening the space between the two by applying force in the 180° direction between the loop and the hook]

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

-Air permeability: KS K ISO 9237 [Textile-Measurement of air permeability of cloth-Air flow velocity that flows vertically through the test piece under conditions of a certain area, pressure, and time]

Performance indicator Example 1 Example 2 Example 3 Example 4 Example 5 Example 6 Existing product Basis weight
(g/㎡) 10 20 30 40 50 60 50 thickness
(Mm) 0.08 0.17 0.25 0.38 0.42 0.48 0.38 Peel strength
(N/inch) 2.4 3.0 3.5 4.0 4.3 3.5 1.5 Shear strength
(N/inch) 38 45 50 58 65 60 33 Ventilation
(cfm) 387 358 314 286 254 230 260

As shown in [Table 2], when comparing the experimental results between the nonwoven fabric loops of Examples 1 to 6 and the existing products, all of the Examples have superior Peel strength and Shear strength compared to the existing products, and in particular Example 5 had a volume similar to that of the existing product, but was found to have excellent strength by about 2 to 3 times, and in addition, the air permeability in the example was overall maintained at less than 400 cfm, and it was confirmed that the final development goal was achieved.

In addition, compared to Example 1, in the case of Example 5, as the basis weight increased, the density increased, so that the air permeability was slightly lowered, whereas the Peel strength and Shear strength were improved. However, as in Example 6, when the basis weight was increased to a certain level or more, as the density increased, the pores in which the hooks could be seated were reduced, so that the Peel strength and the Shear strength were decreased compared to Example 5.

As a result of measuring the safety of such a multi-layered spunbond long fiber nonwoven fabric sheet in accordance with Children's Product Common Safety Standard No. 2017-0118, chlorophenols 0.5 mg/kg or less [KS K 0733] and phthalates ( Phthalates) 0.1% or less [Gas chromatography mass spectrometry (GC-MS) method], Formaldehydes 20 mg/kg or less [KS K ISO 14184-1], Heavy metals 0.1 mg/kg or less, volatile Organic compounds (VOCs) were found to be within the standard value in all measurement items, such as not detected.

Therefore, the long fiber nonwoven fabric loop for a multi-hook fastening member according to the present invention is compared to the existing embossed nonwoven fabric even when repeatedly detaching from various types of hook members, as well as shear strength (horizontal detachment force) as well as peel strength (vertical). As a roof member that can be manufactured at a very low cost, as well as excellent mechanical bonding strength due to improved desorption), it is not only a disposable diaper as well as a disposable diaper, as it exhibits significantly improved quality and safety characteristics compared to the existing nonwoven loops. Personal wear items for adults and infants, personal hygiene materials or clothing, bags, sports goods, protective clothing, disposable products such as bed covers or surgical gowns, etc., can be used in a variety of uses and forms within the scope of the technical idea of the present invention. I can.

10: Filament Non-woven Loop
20: Hook
S1: lower layer web
S2: upper web
11: fusion part
12: non-fused part

Claims (4)

In the nonwoven fabric loop 10 made of a multilayer spunbond long fiber nonwoven fabric sheet,
The lower layer web (S1) is formed of a thermoplastic polyolefin-based long fiber nonwoven sheet having a fineness of 1 to 2 denier, and the upper layer web (S2) is formed of yarn with a fineness of 3 to 5 denier and a fineness of 6 to 8 denier. ) Of the yarn in a ratio of 1: 0.5 to 2, and is formed of a thermoplastic polyolefin-based long fiber nonwoven sheet,
The long-fiber nonwoven sheet laminated with the lower web (S1) and the upper web (S2) is bonded by a thermal emboss roll, so that the upper web (S2) has a plurality of wavy, straight or circular patterns continuous in the longitudinal or transverse direction. The fused part 11 and the non-fused part 12 are formed, and the fused part 11 is set to a width of 0.5 to 1.5 mm and an interval of 1 to 5 mm, so that the bonding area formed on the nonwoven loop is based on the total surface area. Is 10 to 35%,
The non-woven fabric sheet bonded by the lower web (S1) and the upper web (S2) is formed in a range of 0.08 to 0.5 mm in thickness and 10 to 60 g/m2 of basis weight. The method of claim 1,
The lower layer web (S1) and the upper layer web (S2) are polypropylene (PP) yarns alone or a thermoplastic polyolefin-based long fiber nonwoven sheet mixed with polyethylene (PE) yarns, characterized in that the long fiber nonwoven loop for a multi-hook fastening member . delete delete

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