KR101123287B1 - Elastic tie band for disposable diaper - Google Patents

Abstract

An elastic tie band of a disposable diaper without the nonwoven necking process is provided. The elastic tie band is an elastic tie band using a stretchable melt blown nonwoven fabric alone. Stretch meltblown nonwoven fabrics are made by stacking nonwoven webs by weight 20-120 g / m 2 by melt blowing an elastomeric polymer. Melt blown nonwoven fabrics with elastic polymers have a stretchable film adhered as skin material or interposed between nonwoven fabrics as core material and bonded. The manufacture of elastic tiebands from the meltblown nonwoven fabric of the elastic polymer can reduce costs and provide the elastic tiebands of disposable diapers at low cost.

Elastic tie bands, stretch melt-blown nonwoven fabric

Description

Elastic tie band of disposable diaper {ELASTIC TIE BAND FOR DISPOSABLE DIAPER}

The present invention relates to an elastic tie band of a disposable diaper. DETAILED DESCRIPTION OF THE INVENTION The present invention relates to elastic tiebands for disposable diapers made of stretchable meltblown nonwoven fabrics by melt blowing spinning in elastic polymers and manufactured using stretchable meltblown nonwoven fabrics.

In Figure 12 we cited a disposable diaper. Disposable diapers are elongated diaper plate 211 surrounded by lining and outer fabric, front and back waist wrappers 212 and 113 made following one head and the other head of the diaper plate, and laces attached to one side and the other side of the diaper. 214), an absorber 216 filled with the inside of the lining to absorb the moisture delivered by the lining of the diaper plate, a lining 217 that touches the body to transfer the moisture to the inner absorbent, and an outer covering that surrounds the outside of the absorbent so that the moisture retained by the absorber does not leak. Is prepared.

To use a disposable diaper, the front and rear waist wraps of the diaper should be closely attached to the front and back of the body, and the front waist wrap should be pulled on the rear waist wrap. In order to pull the waist wrap, the disposable diaper attaches the tie bands 221 on both sides of the front waist wrap, and attaches the nonwoven loop sheet 226, which is an element of the fiber bonding system, to the hide of the rear waist wrap 213. .

The tie band 221 is made of a necked nonwoven fabric having stretchability and shrinkage elasticity. The stretchability of the nonwoven fabric is imparted by the necking treatment of the nonwoven fabric, and the necking nonwoven fabric has shrinkage elasticity because the elastic film is attached to the inelastic necking nonwoven fabric. The inner region 223 of the tie band is a portion for attaching the tie band to the outer shell of the waist wrap 212. The diaper manufacturer manufactures the diaper plate and attaches the inner region 223 of the tie band manufactured separately to the diaper plate. Ultrasonic bonding is the most commonly used tieband attachment method. The outer region 222 of the tieband is an area for attaching the hook tape 225, which is a fiber bonding system. The tie bands 221 and 221 are loop seats 226 provided on the rear waist wrap 213 with a hook tape 225 attached to the inner side 223 and attached to the outer side 222 on both sides of the front waist wrap 212. ) So that the diaper can be worn on the human body.

The binding system commonly used in tieband 221 is a hook and loop of velcro tape. Velcro hooks and loops are widely used as apparel bonding systems. The most common hooks have a flexible monofilament bent into hooks and densely collected on the hook tape. The other shape of the hook has a "T" shape with the ends of the monofilament bifurcated on either side. As a Velcro loop, a spunbond nonwoven fabric is processed to use the fibers of the nonwoven web as a velcro loop. In addition, spunbond nonwoven webs or knitted fabrics that are suitably machined are used as velcro loops.

One of the means for processing a nonwoven web to use the spunbond nonwoven fabric as a velcro loop is to heat-squeeze the spunbond nonwoven web in a polka dot pattern on a calendar roll. The calender roll is engraved with a polka dot pattern, and when subjected to the process of the calender roll, the first plane heated and pressurized by the pattern portion of the roll and the second plane which does not touch the pattern portion of the calender roll are partitioned. The first plane presses the fibers of the nonwoven web to form the basis of the Velcro loop. The second plane is more prominent than the first plane to be in easy contact with the velcro hook and becomes a loop portion in which the raised fiber loop layer of the spunbond nonwoven web is coupled to the velcro hook. Processing techniques for partitioning the nonwoven web into a first plane and a second plane are also described in detail in Korean Patent Publication No. 10-2004-0028564.

Another means for processing nonwoven webs for using spunbond nonwovens as velcro loops is to provide a loop protrusion on a spunbond nonwoven fabric and is provided in Korean Patent Publication No. 10-0709966. The Velcro loop system installed on the nonwoven fabric by the loop protrusion is a loop protrusion projected on the surface of the nonwoven fabric to be bonded to the adhesive hook, a fiber density of the loop protrusion having a lower density than the bottom of the nonwoven fabric, and a loop protrusion formed to correspond to the preliminary of the adhesive hook. It consists of the joining surface of. The loop protrusion on the surface of the nonwoven fabric heat-presses the back surface of the nonwoven fabric with a pin punch to protrude the loop protrusion onto the surface of the nonwoven fabric. The loop protrusion is 0.5 ~ 15mm in array, 0.1 ~ 7mm in diameter, 0.5 ~ 4mm in height, and the loop of the loop protrusion having a lower fiber density than the bottom of the nonwoven fabric is coupled to the Velcro hook to form a Velcro loop system.

As the adhesive system provided on the back waist wrapper 213 of the disposable diaper, the roof sheet is a nonwoven roof sheet in which the spunbond nonwoven fabric is processed to have a first plane and a second plane, or a loop protrusion is punched to reduce fiber density. It may be a nonwoven loop sheet.

Generally, three types of tie bands 221 of disposable diapers, which are provided by patent technology, are sold. A feature of nonwoven tiebands is that they are made of a composite of a nonwoven fabric and an elastomeric polymer membrane. The most popular tie-band product in the market is a product in which a flexible film is bonded between two layers of necking nonwoven fabrics. Reference is made to FIG. 13 in detail. Spun Bond nonwoven fabric 200, weighing 25g / m2, is necked (shrunk) from 3m in width (w1) to 1.5m in width (w2) to increase the weight of nonwoven fabric 201 to 45g / m2 while simultaneously stretching in the reverse direction of nonwoven fabric Elasticity in which the elastic polymer film is inserted into a three-layer sandwich by melt extruding or laminating an elastic polyolefin-based polymer 203 having a weight of 45 g / m 2 between two necking nonwoven fabrics 201 having a weight of 45 g / m 2. And a nonwoven composite 204 to which elasticity is imparted. The manufactured three-layer nonwoven composite 204 is a composite having elasticity and elasticity in the necking direction, and the elastic body inserted into the sandwich has a contractile elasticity in the elastic nonwoven composite. The nonwoven composite 204 is elongated in the stretched direction and provided to the elastic tie band 221 of the disposable diaper. Such elastic tie bands are used as a band for disposable diapers because their shrinkage characteristics are such that they can be used repeatedly. The elastic tie band made of necking nonwoven fabric has to pay both the necking process and the process of laminating the elastic polymer film between the necking nonwoven fabric. Therefore, the product price of tie band is expensive and this burden is passed on to users of disposable diapers. This should be.

Another tie band is disclosed in Korean Patent Publication No. 10-2007-0094765. The configuration is that the fastening tape tab has a manufacturer side end and a user side end. The fastening tape tab comprises a substrate, ie a support layer and one or more patches of male fastening means, preferably hook means. The patch is disposed on a major surface at the user side end of the support layer. The patch has a proximal end facing the manufacturer side end of the fastening tape tab and a distal end facing the user side end of the fastening tape tab. An edge line is located at the proximal end of the patch and an edge line is located at the distal end of the patch. The fastening tape tab has a width and further includes a handle portion. This product is a nonwoven composite made of pleats on a nonwoven fabric as a physical device that places an elastomeric film between the nonwoven layers and replaces the nonwoven shrink system. This composite has a lower elongation of the band and a higher production cost than the stretchable nonwoven composite having a stretch film disposed between the necking nonwovens.

The other disposable diaper tieband is to cut tough tape and use it as a tieband, which has a low tensile rate and no shrinkage recovery.

A non-woven fibrous layer of nonwoven webs stacked at a constant weight is a nonwoven fabric. One of the universal properties of nonwovens is non-extension and inelasticity. Disposable wet wipes that are frequently encountered in everyday life are non-stretch nonwoven products, including melbrones or spunbonds. Non-extension nonwoven fabrics are necked to provide extensibility. The first axis stretched and necked nonwoven fabric is inherent in the second axis inelastic extensibility within the range of the second axis reduced by the necking. When the necking nonwoven fabric is laminated with the stretchable film, the elasticity is given to the stretchability. Stretching by necking nonwoven fabric and contracting elasticity by laminating with stretchable film can be used as elastic elastic tie band for elasticity, and elastic tie band of disposable diaper made of nonwoven fabric that gives extensibility and shrinkage elasticity to nonwoven fabric is expensive This can only be paid.

The present invention seeks to provide a tieband of disposable diapers which are manufactured at low cost. The present invention seeks to provide an elastic tie band which is manufactured without the necking treatment of the nonwoven fabric. The present invention simplifies the manufacturing process to provide tiebands for disposable diapers with low manufacturing cost of tiebands. This invention manufactures a stretchable melt-blown nonwoven fabric having elasticity and shrinkage elasticity by melting an elastic polymer, thus eliminating necking treatment and making it into an elastic tie band. This invention sometimes embosses a stretchable meltblown nonwoven fabric to increase shrinkage modulus. The present invention increases the contractile modulus strength by bonding the stretchable film to the stretchable meltblown nonwoven fabric as a skin material. The present invention increases the elastic modulus of shrinkage because the elastic film is inserted into the core between the stretchable meltblown nonwoven fabrics. In the present invention, the bonding between the elastic nonwoven fabric and the stretchable film includes lamination bonding, hot melt bonding, or bonding using an adhesive. The invention uses the same polymer for the melt blowing material polymer and the film material polymer so that the product can be recycled when collected after use.

Low-cost manufacturing is urgently needed in the market for nonwoven tiebands, which are part of disposable diapers. This market condition requires the provision of an elongated tie band that meets the functions of disposable diapers, eliminating the costly necking of nonwoven fabrics.

This invention starts from the manufacture of stretchable nonwoven fabrics that retain stretchability. Stretchable nonwoven fabrics are made of stretchable meltblown nonwoven fabrics by stacking nonwoven webs with the desired weight during melt blowing spinning of elastomeric polymers. Melt-blowing spinning is one of the known manufacturing processes of nonwoven fabrics.

Even if the nonwoven fabric has contractile elasticity, if the nonwoven web has a low weight as a tie band due to the small number of nonwoven webs, the elastic nonwoven fabric may be used as a tie band because it is thermally laminated in 2-4 layers. Elastic Melt-blown nonwovens can be reinforced with elasticity by embossing the nonwovens even if they have the necessary weight as tie bands.

The weight of the nonwoven shall be such that it can be used as a tie band. The process of stacking 2-4 layers of non-woven fabrics can be done very simply with a simple device. This process is also advantageous for enhancing the shrinkage elasticity of the nonwoven fabric.

When the nonwoven fabric is heated and pressurized to increase the density, the elastic modulus of shrinkage is improved. Since the nonwoven web is a product in which the nonwoven web is piled up as a non-tissue, it is thought that the heat shrinkage force of the stacked nonwoven webs is concentrated when the nonwoven web is heated and pressurized to increase the contractile elastic strength.

The process of increasing the density by pressurizing the nonwoven fabric may be used as a means to improve the shrinkage elasticity of the nonwoven fabric, in addition to satisfying the weight by collecting the nonwoven fabric with insufficient weight as necessary weight.

An embossing process for reinforcing the elastic elasticity of the nonwoven fabric or for gathering the weight of the nonwoven fabric is to heat-bond the stacked nonwoven web by supplying the nonwoven fabric between the calender roll to be heated and the pressure roll to evenly heat press the nonwoven web. Heat pressurization of the overlapped nonwoven fabric in the calendar roll causes the nonwoven webs of the overlapped nonwoven fabric to be thermally bonded to laminate the nonwoven fabric. Excessive thermal bonding will lose the flexibility, extensibility and contractile elasticity of the nonwoven fabric and the nonwoven fabric will harden. The thermal bonding degree of the nonwoven fabric is allowed within the range of strengthening shrinkage elasticity without curing the nonwoven web.

Calendar rolls for thermal bonding of nonwoven webs can be rolls with a heating press pattern or a flat pattern roll. In either case, it can be used to increase the shrinkage elastic strength of the nonwoven fabric.

The elastic tie band of the disposable diaper can eliminate the necking process of the nonwoven fabric because the fibers of the nonwoven web use elastic nonwoven fabric having elasticity and elasticity.

An elastic melt blown nonwoven fabric is proposed as one of the elastic nonwoven fabrics used in the production of elastic tie bands. Stretch melt blown nonwoven fabric is manufactured by melting elastic polymer and spinning in melt blowing spinning process to pile nonwoven web. Stretch meltblown nonwovens may be made from nonwovens having a weight of 20-120 g / m 2.

Polymers capable of producing an elastic nonwoven fabric include polyolefin elastomers prepared by polymerizing one or more olefin monomers including ethylene, propylene, butadiene, and alpha olefins in an elastic polymer; Polyurethane-based elastomers; An elastomer in which monomers having a polar group and the olefinic monomers are copolymerized; Elastomers in which styrene and the olefin monomers are copolymerized; Nylon elastomers; And polymers of at least one of polyester elastomers.

In the polymer, the melt-blown nonwoven fabric prepared by the melt-blowing spinning process retains elongation and shrinking elasticity, thus eliminating necking in the process of manufacturing the elastic tieband, and cutting the same to prepare the elastic tieband.

Stretch melt blown nonwoven fabrics can be used with laminated stretch films to enhance their stretchability. The stretchable film may be attached to one side of the stretchable meltblown nonwoven fabric or may be bonded by inserting the stretchable film into the core between two layers of stretchable meltblown nonwoven fabric. Bonding a stretchable film to a stretchable meltblown nonwoven fabric as a skin material, or inserting a stretchable film between the stretchable meltblown nonwoven fabric as a core material, results in adhesion of the nonwoven fabrics on the adhesive side with the stretchable film, resulting in increased elasticity. It exhibits stretched and contracted elasticity.

One process of adding a stretchable film to a stretchable meltblown nonwoven is to melt the stretchable polymer in an extruder and to extrude the extruder head (T die) into a film, laminating the stretchable meltblown nonwoven and melted stretchable film on a cold roll. Coating. When the lamination coating is performed while extruding the stretchable film onto the stretchable meltblown nonwoven fabric, the fibers of the nonwoven contact surface penetrate into the thick layer of the molten film, and the stretchable film is cooled and cured to bond the two materials together.

Another process of bonding the stretchable film to the elastic nonwoven fabric is to bond the stretchable film to the elastic nonwoven fabric with hot melt. The hot melt is sprayed onto the stretchable meltblown nonwoven fabric and supplied with the stretchable film and pressurized in a cooling roll before the hotmelt is cured to bond the stretchable film to the surface of the stretchable meltblown nonwoven fabric. The process of inserting the flexible film into the core between the two layers of the nonwoven fabric is performed by the process of hot melt bonding the stretchable meltblown nonwoven fabric and the stretchable film twice to bond the stretchable meltblown nonwoven fabric to the first and second sides of the stretchable film. Bonding is the process of doing.

Another process of bonding the stretchable film to the elastic nonwoven fabric is to bond the stretchable film and the stretchable meltblown nonwoven fabric as an adhesive. To bond the nonwoven fabric and the stretched film using an adhesive, the adhesive is applied to the stretchable film (or nonwoven fabric) and supplied to the adhesive roll to bond the stretched film to one side of the stretchable melt blown nonwoven fabric with an adhesive. Applying the adhesive to the stretchable film can save the adhesive compared to applying to the nonwoven fabric. Application of the adhesive may be applied to the film by an adhesive spray applicator or a roll coder. Even when the adhesive is used, the process of bonding the stretchable meltblown nonwoven fabric to one side of the stretchable film is performed twice to insert the stretchable film into the core between the two layers of stretchable meltblown nonwoven fabric.

The invention will be described with reference to the accompanying drawings.

In Figure 1, the banding, which is excluded from necking and is used as an elastic tie band of a disposable diaper as a single material, is a stretchable melt blown nonwoven fabric (111, 112, 113, ..., 110). If the weight of the stretchable meltblown nonwoven fabric does not reach the weight of the tieband, the stretchable meltblown nonwoven fabric (111, 112, 113) is superimposed and heat-bonded to exclude necking as a single material and is manufactured as a tieband for disposable diapers. If the elastic melt blown nonwoven fabric meets the weight of the T-band, one elastic melt blown nonwoven fabric is used as the band paper. Single stretch melt blown nonwoven band paper is cut into a stretchable melt blown nonwoven band 121 in a plain state, or is used as a contraction elasticity reinforcement of the nonwoven fabric and elastic melt blown nonwoven band 121. In order to enhance the contractile elasticity of the stretchable meltblown nonwoven fabric, the stretchable meltblown nonwoven fabric is heated and pressurized in a calender roll to impart an embossing pattern to the single stretchable meltblown nonwoven band paper. Since the embossed pattern is a heat bond pattern, it improves the contractile elastic strength of the nonwoven web of the nonwoven fabric. Specifically, when the embossed pattern area is 20% of the stretchable meltblown nonwoven plane, the shrinkage modulus strength is increased by 5% and the stretch width is reduced by 3%.

 The stretchable melt blown nonwoven fabric band 121 is a part name cited in the middle of the elastic tie band 120 manufacturing process, but the hook tape 125 is first attached to the stretchable melt blown nonwoven fabric 110 and cut for productivity. Since the elastic tie band is prepared, the process of meeting the stretchable melt blown nonwoven fabric band 121 may be omitted. However, when the hook tape is removed from the elastic tie band 120 manufactured, the state of the parts of the stretchable melt blown nonwoven band 121 is clearly shown in the configuration of the present invention. The hook tape 125 may be manufactured by manufacturing the stretch melt blown nonwoven fabric band 121 and attaching the hook tape to the hook tape attachment region 122. The adhesion of the hook tape is ultrasonic bonding using an ultrasonic gluer or hot melt bonding.

2 and 3 cited the configuration of the elastic tie band.

The elastic tie band 120 has a diaper assembly region 123 and a hook tape attachment region 122 disposed on one side of the stretchable melt blown nonwoven fabric band 121, and may further include a handle region 124.

When the weight of the stretchable melt blown nonwoven fabric does not reach the weight of the elastic tie band 120, the stretched meltblown nonwoven fabrics 111, 112, and 113 overlap and adhere to a plurality of stretched melt blown nonwoven fabrics to meet a required weight. The overlapped nonwoven fabric is heated and pressurized with the embossing pattern 115 to be bonded with a stretchable meltblown nonwoven band paper or heat pressurized in a solid state.

In this specification, the reference numeral 121 denotes an intermediate part in which the stretchable meltblown nonwoven fabric using only the stretchable meltblown nonwoven fabric is cut to the size of a tie band. Reference numeral 121 is cited, respectively, to distinguish the processing process of the stretchable meltblown nonwoven fabric 110. Specifically, the stretchable meltblown nonwoven fabric band 121 made of only the stretchable meltblown nonwoven fabric, the stretchable meltblown nonwoven fabric band 121 in which the stretchable film is laminated on the stretchable meltblown nonwoven fabric according to the skin film bonding process, the stretchability It is cited as a stretchable meltblown nonwoven band 121 hot melt bonded to a film stretchable meltblown nonwoven fabric, and a stretchable meltblown nonwoven band 121 bonded to a stretchable meltblown nonwoven fabric with an elastic film.

In the disposable diaper of FIG. 4, an elastic tie band made of an elastic melt blown nonwoven band 121 is assembled. The front waist wrapper 212 is connected to one side of the diaper plate 216 and the rear waist wrapper 213 is connected to the other side, and the elastic tie band 120 connected to both sides of the front waist wrapper 212 of the diaper is bonded to the tie band. The hook tape 125 is coupled to the loop seat 226 provided on the back waist wrapper 213 so that the diaper may be worn on the body.

In FIG. 5, an adhesive apparatus for laminating nonwoven fabrics of less weight is cited. The stretch meltblown nonwoven fabric is heated and pressurized in a calendar roll to enhance shrinkage elasticity. If the elastic melt-blown nonwoven fabric is less than 20-120g / ㎡, 2-4 layers of nonwoven fabric (111,112,113, ...) underweight are stacked and embossed on a heat-bonded lamination roll (131,141) that is heated and pressurized. Gather weight and at the same time strengthen the shrinking elasticity of stretch meltblown nonwovens. The sum of the areas of the embossed pattern 115 by the lamination calendar roll is within 20% of the nonwoven plane area. The stretchable meltblown nonwoven fabrics 111,112,113, ..., for weighting are nonwoven fabrics having a weight of 5-20 g / m 2.

Embossing the stretchable meltblown nonwoven fabric 110 shortens the bonding distance of the fiber pile of the nonwoven web and increases the fiber density of the nonwoven fabric, thereby enhancing the contractile elasticity of the nonwoven fabric. The embossing of the nonwoven fabric by the thermal adhesive lamination rolls 131 and 141 may use a non-patterned thermal adhesive lamination roll having no pattern.

The elastic tie band 120 of the disposable diaper of Figures 1 to 3,

Stretchable meltblown nonwoven fabric 110, weight 20-50g / m2, preferably stretched meltblown nonwoven fabric band 121, cut from 20-50g / m2, phosphorous meltblown nonwoven fabric 110,

Diaper assembly area 123 disposed on one side of the stretchable melt blown elastic band for attaching the tie bands on both sides of one waist wrapper of the diaper nonwoven fabric,

Hook tape attachment area 122 disposed on the other side of the elastic melt blown elastic band,

And a hook tape 125 bonded to the hook tape attaching region 122 of the stretchable melt blown elastic band.

When the weight of the stretch meltblown nonwoven fabric is less than the weight of the tie band, the weight of the tie band is collected by the process of FIG. 5. The stretchable meltblown nonwoven fabrics 111, 112, 113, and 114 of FIG. 5 are respectively superimposed and guided by adhesive guide rolls 131 and 141, guided by a guide roll, and laminated to a stretchable meltblown nonwoven fabric 110 having a weight of 20-50 g / m 2. .

In the apparatus of FIG. 6, there is provided a stretchable meltblown nonwoven fabric 110a in which one stretchable film 100 is laminated on a first surface of one stretchable meltblown nonwoven fabric 110 as a skin material. The stretchable meltblown nonwoven fabric 110a is a material capable of producing elastic tiebands of disposable diapers without necking.

6, one stretchable film 100 having a weight of 25-70g / m 2 is formed as a skin material in the extruder 140, and the first surface of one stretchable meltblown nonwoven fabric 110 having a weight of 20-50g / m 2. Lamination is bonded as a skin on the cooling rolls 132 and 142 to produce a stretchable meltblown nonwoven fabric 110a.

When the elastic melt blown nonwoven fabric 110a having the skin material laminated is manufactured, the diaper assembly area 123 disposed on one side of the elastic melt blown nonwoven band and the hook tape attachment area disposed on the other side of the elastic melt blown nonwoven band ( 122) and a hook tape 125 adhered to the hook tape attachment area 122 to produce an elastic tie band for a diaper.

In the apparatus of FIG. 7, one stretchable film 100 is inserted into the core between the first and second stretchable meltblown nonwoven fabrics 111 and 112 to provide a stretchable meltblown nonwoven fabric 110b with lamination bonding. The stretch meltblown nonwoven fabric 110b is a material that can be used as an elastic tie band without necking.

Fig. 7 One stretchable film 100 having a weight of 25-70g / m 2 and a first stretched melt-blown nonwoven fabric 111 having a weight of 20-50g / m 2 formed on the cooling rolls 133 and 143 in the extruder 140. And a second stretchable meltblown nonwoven fabric 112 having a weight of 20-50 g / m2 and supplied to the first and second stretchable meltblown nonwoven fabrics 111 and 112 on the first and second surfaces of the stretchable film 100. ) Is simultaneously laminated and bonded to produce a stretchable meltblown nonwoven fabric 110b.

The stretchable melt blown nonwoven fabric 110b is provided with a diaper assembly area 123, a hook tape attaching area 122, and a hook tape 125 so that the stretchable film 100 is formed as a core between two layers of stretchable melt blown nonwoven fabric. An inserted elastic tie band is produced.

The conditions of the extruder for lamination adhesion to the stretchable melt-blown nonwoven fabric in the process of Figure 6, 7, the polymer melt temperature 150-245 ℃, extrusion pressure 1200psi, T-die temperature 200-215 ℃.

In the apparatus of FIG. 8, there is provided a stretchable meltblown nonwoven fabric 110c in which one stretchable film 101 is hot melt-bonded as a skin material to a first surface of one stretchable meltblown nonwoven fabric 110. As shown in FIG. The stretchable meltblown nonwoven fabric 110c is a material capable of producing elastic tiebands of disposable diapers without necking.

8 is provided with one stretchable melt blown nonwoven fabric 110 having a weight of 20-50 g / m 2 and one stretchable film 101 having a weight of 25-70g / m 2, and a hot melt applicator 150. In one stretch melt blown nonwoven fabric 110, a hot melt 155 is applied to the stretch melt melt blown nonwoven fabric 110c is hot-melt bonded to the skin material.

When the elastic melt blown nonwoven fabric 110c having hot melt adhesive material is manufactured, the diaper assembly area 123 disposed on one side of the elastic melt blown nonwoven band and the hook tape attachment area disposed on the other side of the stretchable melt blown nonwoven band ( 122) and a hook tape 125 adhered to the hook tape attachment area 122 to produce an elastic tie band for a diaper.

In the apparatus of FIG. 9, a stretchable film 101 is inserted into a core material between the first and second stretchable meltblown nonwoven fabrics 111 and 112 to provide hot melt-bonded stretchable meltblown nonwoven fabric 110d. The stretchable melt blown nonwoven fabric 110d to which the stretchable film core is hot melt-bonded is a material that can be used as an elastic tie band without necking.

By applying the process of FIG. 8 to the adhesive rolls 135 and 145 of FIG. 9, the stretchable film 101 having a weight of 25 to 70 g / m2 is hot melted on the first surface of the stretchable melt blown nonwoven fabric 111 having a weight of 20-50 g / m2. The first elastic melt blown nonwoven fabric 110c and the second elastic melt blown nonwoven fabric 112 having a weight of 20-50 g / m 2 are supplied and the hot melt 155 is applied in the hot melt applicator 150 to the second nonwoven fabric. Thus, the stretchable melt blown nonwoven fabric 110d having hot melt adhesiveness with the first and second nonwoven fabrics as a core material is manufactured on the first and second surfaces of one stretchable film 101.

The stretchable melt blown nonwoven fabric 110d is provided with a diaper assembly area 123, a hook tape attaching area 122, and a hook tape 125 so that one stretchable film 100 is formed of the first and second stretch melt blown sheets. An elastic tie band is inserted into the core between the nonwoven fabrics.

In the apparatus of FIG. 10, there is provided a stretchable meltblown nonwoven fabric 110e in which one stretchable film 102 is adhered to the first side of one stretchable meltblown nonwoven fabric 110 by means of an adhesive as a skin material. The stretchable meltblown nonwoven fabric 110e to which the skin material is adhered is a material capable of producing an elastic tie band of a disposable diaper without necking.

10 is provided with one stretchable melt blown nonwoven fabric 110 having a weight of 20-50 g / m 2 and one stretchable film 102 having a weight of 25-70 g / m 2, and an adhesive applicator 160. An adhesive 165 is applied to the stretchable film 102 to produce a stretchable meltblown nonwoven fabric 110e in which a skin material is bonded with an adhesive.

When the skin material is an elastic melt blown nonwoven fabric 110e as an adhesive material, the diaper assembly area 123 disposed on one side of the elastic melt blown nonwoven band and the hook tape attachment area disposed on the other side of the elastic melt blown nonwoven band 122 And a hook tape 125 bonded to the hook tape attachment region 122 to manufacture an elastic tie band for a diaper.

In the apparatus of FIG. 11, a stretchable film 102 is inserted into the core between the first and second stretchable meltblown nonwoven fabrics 111 and 112 to provide a stretchable meltblown nonwoven fabric 110f bonded with an adhesive. The stretchable meltblown nonwoven fabric 110f in which the core is inserted as a scavenger is a material that can be used as an elastic tie band without necking.

One stretchable film having a weight of 25-70 g / m 2 on the first surface of the first stretchable melt blown nonwoven fabric 111 having a weight of 20-50 g / m 2 by applying the process of FIG. 10 to the adhesive rolls 136 and 146 of FIG. A stretchable meltblown nonwoven fabric 110e to which 102 is bonded and a second stretchable meltblown nonwoven fabric 112 having a weight of 20-50 g / m 2 are supplied and an adhesive 165 in the adhesive applicator 160 is applied to the stretchable film 102. ) Is applied to produce a stretchable meltblown nonwoven fabric 110f in which the first and second nonwoven fabrics are adhered to the first and second nonwoven fabrics with an adhesive as a core material.

The elastic film 100 is doubled by installing the diaper assembly area 123, the hook tape attaching area 122, and the hook tape 125 in the stretchable melt-blown nonwoven fabric 110f bonded to the nonwoven fabric with an adhesive. An elastic tie band is inserted into the core between elastic melt blown nonwoven fabrics.

The adhesive applied to the adhesive applicator 160 in the process of FIGS. 10 and 11 is one of polyurethane elastomer, EPDM, polybutene, and EVA adhesive.

The stretchable melt-blown nonwoven fabric for producing the elastic tie band as a single material includes a polyolefin-based elastomer prepared by polymerizing one or more olefinic monomers including ethylene, propylene, butadiene, and alpha olefins in a shrink-elastic polymer; Polyurethane-based elastomers; An elastomer in which monomers having a polar group and the olefinic monomers are copolymerized; Elastomers in which styrene and the olefin monomers are copolymerized; Nylon elastomers; And meltblown nonwovens made of one or more polymers of polyester elastomers.

The elastic tie band of the present invention may further include a handle area for holding by a hand when the hook tape is detached from the roof sheet outside the hook tape attaching area of the disposable diaper elastic tie band. 120 may further include a handle area 124 for detaching the hook tape from the roof sheet outside the hook tape attaching area of the elastic melt blown nonwoven band 121. The elastic tie band 120 is hooked. When the tape 125 is attached to the loop seat 226 of the waist wrap 113 by holding the handle area 124 and pulled up, the hook tape 125 is separated from the loop seat 226 in order from one end. Therefore, the elastic tie band 120 can be easily separated from the roof sheet.

The present invention provides an elastic tie band attached to the left and right sides of the diaper and used to prevent the diaper from falling down when the baby diaper and the adult diaper are worn. The elastic tie band provided in the present invention eliminates the necking of the nonwoven fabric and manufactures the elastic tieband based on the stretchable meltblown nonwoven fabric in which the elastic polymer is piled into the nonwoven web during the melt blowing spinning process. The elastic tie band of the present invention provides an elastic tie band of a disposable diaper which can reduce energy consumption in the manufacturing process, save resources, and lower the supply price. This invention elastic tie band strengthened the elasticity inherent in nonwoven web during high productivity processing. In the present invention, when the weight of the nonwoven fabric is less than the weight of the elastic band, the stretchable melt blown nonwoven fabric is stacked in two to four layers and heated and pressurized in a lamination roll to be used as the stretchable meltblown nonwoven band paper. In the present invention, even if the weight of the nonwoven fabric meets the weight of the elastic band, the nonwoven fabric is embossed to increase the density of the nonwoven fabric and to enhance elasticity. Embossing of the nonwoven includes pattern embossing or plain embossing. In addition, the invention uses the same polymer as the melt blowing material polymer and the film material polymer so that the product can be recycled when collected after use.

Example 1.

An elastic polymer capable of manufacturing the stretchable melt blown nonwoven fabric 110 for using the elastic tie band for disposable diapers as a nonwoven fabric is

Polyolefin-based elastomers prepared by polymerizing at least one olefin-based monomer including ethylene, propylene, butadiene, and alpha olefins;

Polyurethane-based elastomers;

An elastomer in which monomers having a polar group and the olefinic monomers are copolymerized;

Elastomers in which styrene and the olefin monomers are copolymerized;

Nylon elastomers;

And polymers of at least one of polyester elastomers.

Example 2.

Melt polyolefin-based elastomers during melt blowing process, spinning nonwoven web to weigh 120g / m2 to make stretchable meltblown nonwoven fabric and add embossing pattern to 20% of nonwoven area to enhance density and elasticity Stretch meltblown nonwoven band paper was prepared.

Example 3.

Embossing pattern is arranged on the first side of the nonwoven fabric by heating, pressing and adhering three layers of elastic melt-blown nonwoven fabrics weighing 45g / m2, and applying the embossing pattern from the calendar roll with diamond pattern and the adhesive roll with cooling roll. A stretch meltblown nonwoven band paper having a weight of 135 g / m 2 was prepared.

Example 4.

Two layers of stretchable melt blown nonwoven fabrics weighing 60g / m2 are stacked and bonded by embossing pattern on a roll of diamond roll and a roll of diamond with a cooling roll. A stretch meltblown nonwoven band paper of 2 m 2 was prepared.

Example 5.

A three-ply stretchable meltblown nonwoven fabric weighing 45g / m2 was superimposed and bonded with a flat pattern between the rolled calender roll and the cooling roll to produce a rolled stretched meltblown nonwoven fabric band having a shrinkage elasticity and weighing 135g / m 2.

Example 6.

An elastic tie band of the disposable diaper of Table 1 was prepared by using the stretchable meltblown nonwoven band paper of Examples 2 to 4.

Table 1. Example 2-4 Dimensional specification of elastic tie bands made of band paper

product no Example Weight (g / ㎡) Length
(mm) width
(mm) Width of diaper assembly area
(mm) Width of hook tape assembly area (mm) The width of the handle area
(mm) I 2 120 70 30 15 15 5 II 3 45 70 30 15 15 5 III 4 60 80 36 18 18 5 IV 5 45 60 25 15 15 4

Example 7.

Table 2 shows the shrinkage modulus test results of the elastic tie bands of Example 6.

Table 2. Table 1 Shrinkage Elasticity Test Table of Elastic Tie Bands

product no Primary 30% Elongation (g / f) Primary recovery force (g / f) Secondary recovery
Force (g / f) Stretching force (g / f) % Break Transverse stretching force (g / f) Test Methods I 1560 192 144 2712 600 5808 STM II 576 72 54 1017 225 2178 STM III 936 114 102 1596 336 3744 STM IV 540 81 59 931 257 2140 STM

Example 8.

Table 3 shows the test results of necking tie bands of commercially available disposable diapers.

Table 3. Necking tiebands with weights 125g / m2 A, B, C, D

product no Primary 30% Elongation (g / f) Primary recovery force (g / f) Secondary recovery
Force (g / f) Stretching force (g / f) % Break Transverse stretching force (g / f) Test Methods A 503 63 45 938 215 2765 STM B 503 63 45 938 215 2765 STM C 615 73 53 1194 206 3308 STM D 416 56 42 635 268 2440 STM

Example 9.

Comparative Example

Table 3 Product A and Product B are high-quality products that have been demonstrated in the market for tie band practicality.

Table 3 This invention's elastic tie bands which show similar performance test results of Product A and Product B are Table 2 Product II, Product III and Product IV.

Necking tie band products A and B weigh 125g / m2 with a stretchable film inserted inside. The stretch meltblown nonwoven products II, III and IV weigh 45g / m 2, 60g / m 2 and 45g / m 2, respectively. This comparison shows that elastic tie bands made of stretchable meltblown nonwoven fabrics can be used with the same potency as necked tin tie bands with necking treatment.

Example 10.

The elastic tie band of the following configuration was manufactured using the stretchable meltblown nonwoven fabric referred to in FIGS. 3 and 1.

1) Elastic melt blown nonwoven fabric with non-woven web with weight 50g / ㎡ by melt blowing elastic polymer

2) stretch meltblown nonwoven band (121)

2) diaper assembly area 123 disposed on the elastic band

3) Hook tape attachment area 122 disposed on the other side of the elastic band

4) Hook Tape (125)

Example 11.

An elastic tie band of the following configuration was manufactured using an elastic melt blown nonwoven fabric with reference to FIGS. 6 and 2 and having elastic skin on the first side.

1) A stretchable melt blown nonwoven fabric 110, which is bonded to a stretchable film and melt blown an elastic polymer, and a nonwoven web is stacked at a weight of 50 g / m 2.

2) the stretchable film 100 molded into the weight 70g / ㎡ in the extruder 140 and laminated to a nonwoven fabric in the cooling rolls (132, 142)

3) the stretchable melt blown nonwoven fabric 110a to which the stretchable film 100 is laminated

4) elastic melt blown nonwoven fabric band 121 cut from the nonwoven fabric 110a

5) Diaper assembly area 123 disposed on the elastic band

6) Hook tape attachment area 122 disposed on the other side of the elastic band

7) Hook Tape (125)

Example 12.

An elastic tieband of the following configuration was prepared using an elastic melt blown nonwoven fabric with reference to FIGS. 7 and 3 and having elastic skin.

1) the stretchable film 100 having a weight of 70g / ㎡ formed as a core material in the extruder 140

2) The stretchable melt-blown nonwoven fabric 111, which is bonded to the first surface of the stretchable film 100 on the cooling rolls 133 and 143, and has a weight of 40 g / m 2.

3) The stretchable melt-blown nonwoven fabric 112, which is bonded to the second surface of the stretchable film 100 on the cooling rolls 133 and 143, and has a weight of 40 g / m 2.

4) A stretchable meltblown nonwoven fabric 110b laminated on the first and second surfaces of the stretchable film 100, which is a core material, and having a weight of 40 g / m 2.

5) stretchable melt blown nonwoven fabric band 121 cut from nonwoven fabric 110b

6) diaper assembly area 123 disposed on the elastic band

7) Hook tape attachment area 122 disposed on the other side of the elastic band

8) Hook Tape (125)

Example 13.

An elastic tieband of the following configuration was prepared using an elastic meltblown nonwoven fabric with reference to FIGS. 8 and 4 and with elastic skin.

1) A stretchable melt blown nonwoven fabric 110, which is bonded to a stretchable film and melt blown an elastic polymer, and a nonwoven web is stacked at a weight of 50 g / m 2.

2) hot melt 155 spray applied by the hot melt applicator 150 on the first surface of the nonwoven fabric 110

3) the stretchable film 101 having a weight of 50 g / m 2 and supplied to the adhesive rolls 134 and 144

4) The stretchable melt blown nonwoven fabric 110c in which the stretchable film 101 is hot melt bonded to the first surface of the nonwoven fabric as a skin material.

4) elastic melt blown nonwoven fabric band 121 cut from the nonwoven fabric 110c

5) Diaper assembly area 123 disposed on the elastic band

6) Hook tape attachment area 122 disposed on the other side of the elastic band

7) Hook Tape (125)

Example 14.

 An elastic tieband of the following configuration was made using an elastic meltblown nonwoven fabric with reference to FIGS. 9 and 5 and with elastic skin.

1) A stretchable film 101 having a weight of 70 g / m 2 supplied as a core material for adhering the nonwoven fabric to the first and second surfaces on the cooling rolls 135 and 145 for two times.

2) The stretchable melt blown nonwoven fabric 111, which is bonded to the first surface of the stretchable film 101 on the cooling rolls 135 and 145, and has a weight of 40 g / m 2.

3) The stretchable melt blown nonwoven fabric 112, which is bonded to the second surface of the stretchable film 101 on the cooling rolls 135 and 145, and has a weight of 40 g / m 2.

4) hot melt 155 spray-coated in the hot melt applicator 150 on the first and second surfaces of the nonwoven fabric 110.

5) stretchable melt blown nonwoven fabric 110d in which a nonwoven fabric is hot melt-bonded to the first and second surfaces of the stretchable nonwoven fabric

6) non-woven fabric (110d) stretch melt blown nonwoven fabric band 121

7) Diaper assembly area 123 disposed on the elastic band

8) Hook tape attachment area 122 disposed on the other side of the elastic band

9) Hook Tape (125)

Example 15.

An elastic tieband of the following configuration was made using an elastic meltblown nonwoven fabric with reference to FIGS. 10 and 6 and having elastic skin.

1) A stretchable melt blown nonwoven fabric 110, which is bonded to a stretchable film and melt blown an elastic polymer, and a nonwoven web is stacked at a weight of 50 g / m 2.

2) the adhesive 165 spray-coated in the adhesive applicator 160 on the first surface of the nonwoven fabric 110

3) stretchable film 102 having a weight of 50 g / m 2 supplied to adhesive rolls 136 and 146

4) The stretchable melt blown nonwoven fabric 110e, in which the stretchable film 102 is bonded to the nonwoven fabric first surface as a skin material.

4) elastic melt blown nonwoven fabric band 121 cut from the nonwoven fabric 110e

5) Diaper assembly area 123 disposed on the elastic band

6) Hook tape attachment area 122 disposed on the other side of the elastic band

7) Hook Tape (125)

Example 16.

An elastic tieband of the following configuration was manufactured using an elastic melt blown nonwoven fabric with reference to FIG. 11, claim 7, and having elastic skin.

1) A stretchable film 102 having a weight of 70 g / m 2 supplied as a core material for bonding the nonwoven fabric to the first and second surfaces on the cooling rolls 136 and 146 for two times.

2) the stretchable melt blown nonwoven fabric 111, which is bonded to the first surface of the stretchable film 102 in the cooling rolls 136 and 146, and has a weight of 40 g / m 2.

3) The stretchable meltblown nonwoven fabric 112, which is bonded to the second surface of the stretchable film 102 in the cooling rolls 136 and 146, and has a weight of 40 g / m 2.

4) the adhesive 165 spray-coated in the adhesive applicator 150 on the first and second surfaces of the nonwoven fabric 110

5) stretchable meltblown nonwoven fabric 110f in which a nonwoven fabric is bonded by an adhesive to the first and second surfaces of the stretchable nonwoven fabric

6) stretch melt blown nonwoven fabric band 121 cut nonwoven fabric 110f

7) Diaper assembly area 123 disposed on the elastic band

8) Hook tape attachment area 122 disposed on the other side of the elastic band

9) Hook Tape (125)

1 is a step for producing an elastic tie band made of a stretchable melt blown nonwoven fabric

2 is an exploded view of an elastic tie band made of a stretchable meltblown nonwoven fabric

Figure 3 is an assembly view of the elastic tie band made of elastic melt blown nonwoven fabric

Figure 4 is a state in which the elastic tie band assembled to the diaper

5 is a lamination device of the stretchable meltblown nonwoven fabric

6 is an apparatus for laminating a skin material on a first surface of an elastic melt blown nonwoven fabric

7 is an apparatus for laminating a core material between stretchable meltblown nonwoven fabrics.

8 is an apparatus for hotmelt bonding skin material to a first surface of a stretchable meltblown nonwoven fabric

9 is a device for hot-melt bonding the core material to the yarn of the stretchable melt blown nonwoven fabric

10 is an apparatus for bonding the skin material to the first surface of the stretchable meltblown nonwoven fabric with an adhesive

11 is an apparatus for bonding a core material with an adhesive between stretchable meltblown nonwoven fabrics

12 is an assembly view of a conventional disposable diaper and tie band

13 is a manufacturing process diagram of a conventional tie band

Explanation of Major Symbols

100, 101, and 102 are stretchable films,

110 is a stretch meltblown nonwoven fabric

110a, 110c, 110e are stretchable meltblown nonwoven fabrics with skin material added

110b, 110d, 110f is a stretchable meltblown nonwoven fabric with a core added between the nonwoven fabrics

111, 112, 113, 114 are stretch meltblown nonwovens

115 is embossing pattern

120 is elastic tie band

121 is a stretch meltblown nonwoven band

122 is hook tape attachment area

123 is the diaper assembly area

124 is the handle area

125 tape hook

131 and 141 are thermal adhesive lamination rolls

140 T Die Extruder

132,143; 133,143 is a cooling roll

134,144; 135,145; 136,146 is adhesive roll

150 is hot melt applicator

155 hot melt

160 silver glue applicator

165 glue

Claims (13)

In the elastic tie band of a disposable diaper composed of a melt-blown nonwoven sole material, As a nonwoven fabric having extensibility and shrinkage elasticity, a polyolefin elastomer prepared by polymerizing one or more olefin monomers including ethylene, propylene, butadiene, and alpha olefins; Polyurethane-based elastomers; An elastomer in which monomers having a polar group and the olefinic monomers are copolymerized; Elastomers in which styrene and the olefin monomers are copolymerized; One or more polymers of nylon and polyester elastomers are melted in a melt-blown process to stack nonwoven webs with a weight of 5-50 g / m2, and the embossed patterns are arranged on the stacked nonwoven webs within 20% of the flat area. Stretch meltblown nonwovens; A stretchable meltblown nonwoven fabric having a weight of 20-50 g / m 2 by stacking, heating, pressing and bonding the stretched meltblown nonwoven fabric having an embossed pattern arranged therein; Elastic tie bands for disposable diapers obtained by cutting overlapped stretchable meltblown nonwoven fabrics for tie band applications. In the elastic tie band of the disposable diaper with the film attached to one side of the nonwoven fabric, As a nonwoven fabric having extensibility and shrinkage elasticity, a polyolefin elastomer prepared by polymerizing one or more olefin monomers including ethylene, propylene, butadiene, and alpha olefins; Polyurethane-based elastomers; An elastomer in which monomers having a polar group and the olefinic monomers are copolymerized; Elastomers in which styrene and the olefin monomers are copolymerized; One or more polymers of nylon and polyester elastomers are melted in a melt-blown process to stack nonwoven webs with a weight of 5-50 g / m2, and the embossed patterns are arranged on the stacked nonwoven webs within 20% of the flat area. Stretch meltblown nonwovens; And Polyolefin-based elasto made by coating a first surface of a stretchable melt-blown nonwoven fabric with one embossing pattern and polymerizing one or more olefin-based monomers including ethylene, propylene, butadiene and alphaolefin what; Polyurethane-based elastomers; An elastomer in which monomers having a polar group and the olefinic monomers are copolymerized; Elastomers in which styrene and the olefin monomers are copolymerized; Nylon elastomers; And one stretchable film having a weight of 25-70 g / m 2 composed of at least one polymer of polyester elastomer, Elastic tie band of a disposable diaper comprising a. In the elastic tie band of a disposable diaper with a nonwoven fabric attached to both sides of the film, Polyolefin-based elastomers which are molded in an extruder and manufactured by polymerizing one or more olefinic monomers including ethylene, propylene, butadiene, and alphaolefins; Polyurethane-based elastomers; An elastomer in which monomers having a polar group and the olefinic monomers are copolymerized; Elastomers in which styrene and the olefin monomers are copolymerized; Nylon elastomers; And one stretchable film made of at least one polymer of polyester elastomer and weighing 25-70 g / m 2; A non-woven fabric having extensibility and shrinkage elasticity that is adhered to a first surface of a stretchable film having a weight of 25-70 g / m 2, and is produced by polymerizing one or more olefin monomers including ethylene, propylene, butadiene, and alpha olefins. System elastomers; Polyurethane-based elastomers; An elastomer in which monomers having a polar group and the olefinic monomers are copolymerized; Elastomers in which styrene and the olefin monomers are copolymerized; One or more polymers of nylon and polyester elastomers are melted in a melt-blown process to stack nonwoven webs with a weight of 5-50 g / m2, and the embossed patterns are arranged on the stacked nonwoven webs within 20% of the flat area. Stretch meltblown nonwovens; And A non-woven fabric having extensibility and shrinkage elasticity that is adhered to a second surface of a stretchable film having a weight of 25-70 g / m 2, and is made by polymerizing one or more olefin monomers including ethylene, propylene, butadiene, and alpha olefins. System elastomers; Polyurethane-based elastomers; An elastomer in which monomers having a polar group and the olefinic monomers are copolymerized; Elastomers in which styrene and the olefin monomers are copolymerized; One or more polymers of nylon and polyester elastomers are melted in a melt-blown process to stack nonwoven webs with a weight of 5-50 g / m2, and the embossed patterns are arranged on the stacked nonwoven webs within 20% of the flat area. Stretch meltblown nonwovens; Elastic tie band of the disposable diaper comprising a. (delete) (delete) (delete) (delete) The method according to any one of claims 1 to 3, The elastic tie band of the disposable diaper is an elastic tie band of the disposable diaper including a diaper assembly region 123, and a hook tape attachment region 122 in the stretchable melt-blown nonwoven band 121. The method of claim 8, An elastic tie band of a disposable diaper further comprising a handle region 124 in the stretchable meltblown nonwoven band 121. (delete) (delete) (delete) The method according to any one of claims 2 and 3, The means for bonding the stretchable film to the stretchable meltblown nonwoven fabric is lamination bonding, and the extrusion conditions of the stretchable film are elastic tie bands of disposable diapers having a polymer melting temperature of 150-245 ° C, an extrusion pressure of 1200psi, and a T-die temperature of 200-215 ° C.

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