KR100601005B1 - Cover for diaper - Google Patents

Abstract

The present invention provides an elastic nonwoven composite by attaching an elastic body to a nonwoven fabric provided with extensibility, to prepare a diaper cover using the prepared elastic nonwoven composite, to install a diaper attachment means in the nonwoven composite diaper cover, and to attach the diaper. The means is a diaper cover characterized in that it is a hook belt of velcro tape bonded to the nonwoven fibers of a disposable diaper. According to this invention, as described above, the present invention provides a disposable diaper cover made of elastic nonwoven composite imparted with elasticity, provides a disposable diaper cover made of elastic nonwoven composite preserved breathability, and is capable of separating the absorbent material from the cover. The diaper cover is provided, and the use of elastic nonwoven fabric prevents the free movement of the diaper during wearing, and the flexible elasticity gives it a good fit with the body shape of the infant when worn, the change of the diaper is low, the price is low, The diaper cover (cover) of the invention can be used repeatedly for several diapers.

Description

Diaper Cover {COVER FOR DIAPER}

1 is an embodiment gravure roll coating device

Figure 2 is an embodiment dipping coating device

Figure 3 is another embodiment coating device

Figure 4 is an embodiment of the lamination device of the elastic nonwoven fabric and elastic nonwoven composite

Figure 5 is a lamination device of the elastic nonwoven fabric and the stretchable nonwoven composite

Figure 6 is an embodiment diaper cover structure diagram made of the present invention elastic nonwoven composite

7 is an exploded view of an embodiment of a diaper cover

8 is a perspective view of an embodiment of the diaper cover

9 is a partially enlarged cross-sectional view of a diaper cover in which a diaper is assembled;

10 is a perspective view of another embodiment diaper cover

<Description of Major Reference Drawings>

10 is elastic nonwoven composite, 11 is stretchable nonwoven, 12 is elastic, 71 is diaper cover, 87 is diaper, 84 is hook strap

This invention relates to a diaper cover, and more particularly to a disposable diaper cover made by imparting elasticity to a nonwoven fabric.

Conventionally, disposable diapers have a straight diaper that wears a rectangular absorbent material in a conventional manner, and a panty diaper that can be applied by attaching the absorbent material to a panty cover. Pants-type diapers are convenient to use and clean in use, but are sold at a price 2.5 times higher than that of straight diapers. On the other hand, the diaper is inexpensive and is economical and resource-saving because it is repeatedly used. However, when the diaper and the cover are moved, the baby's excretion leaks to the side, and it is inconvenient to wear. The inconvenience of having to wash separately is pointed out.

In the conventional disposable panty-type diaper, both a panty-type diaper made of a panty shape by attaching an absorbent material and a cover before wearing, and a diaper having an absorbent material attached to a developing panty-type cover that can be coated in a panty shape when worn are used. The panty-type diaper and the unfolding panty-type diaper cover together form an elastic pleat by inserting an elastic member at the edge of the leg insertion part to impart elasticity to the non-elastic material. The developing panty-type diaper divides the waist band portion at both ends of the cover. It was configured to connect the bands at both ends to the waist when worn.
Body contact products (hygiene products, diapers, diaper covers, etc.) made of nonwoven composites having elasticity in Korean Patent Application Laid-open No. 2004-66436, which is published after the present invention; Nonwoven fabrics provided with extensibility as a material for providing a body contact product; An elastic nonwoven composite comprising an elastomer layer; A method and a shape in which an elastic layer is formed on one side of a nonwoven fabric; The capacity of the elastic body imparted to the nonwoven fabric, the coating copolymer and the composition of the solvent are introduced.

This invention is made of elastic nonwoven composite, breathable is preserved, the diaper can be separated from the cover, the elastic nonwoven composite is prevented from free movement of the diaper during wearing, and the elastic elasticity is given to the baby when wearing The aim is to provide a diaper cover that is well suited to the body shape and body, and is inexpensive and can be used repeatedly on several diapers. Diaper covers of the present invention include infant diapers and adult diapers.

The present invention provides a diaper attachment device characterized by the installation of a disposable diaper cover and a velcro tape (tape with hook and loop as an adhesive means) manufactured by an elastic nonwoven composite. The diaper cover of the present invention by the elastic nonwoven composite has good adhesion, and compared with the conventional diaper cover, the manufacturing process for imparting elasticity to the leg insertion portion and the wrinkled structure with elasticity can be omitted, and the disposable diaper can be used several times. Can be used repeatedly, saving resources and economical. The elastic nonwoven composite according to the present invention includes a breathable nonwoven composite and a non-breathable nonwoven composite. The elastic nonwoven composite of the present invention is elastic to the stretchable nonwoven fabric by coating, spraying, or electrodepositing the elastic plastic elastomer on a nonwoven fabric having necking, pleating, or shearing the nonwoven fabric to embed the extensibility. It is a complex given. In the present invention, the elastic nonwoven composite diaper cover is provided with a hook of velcro tape on one side of the elastic nonwoven fabric cover and the straight diaper to couple the hook of the velcro tape to the other nonwoven fabric to integrate the diaper and the cover.

Dividing the elements constituting this invention as follows.

1. Stretchable nonwoven

The first non-woven fabric is given a first axial contraction (Necking) to give extensibility. If the width is reduced in the width direction, the extensibility to stretch to the original width is inherent. Other stretchable nonwovens include nonwovens pleated or shredded. Nonwoven fabrics capable of providing extensibility in the present invention include polypropylene thermal bond nonwoven fabrics, polypropylene spunbond nonwoven fabrics, polypropylene melt blown nonwoven fabrics, bicomponent nonwoven fabrics of polypropylene and polyethylene, polypropylene melt blown nonwoven fabrics and poly Nonwoven fabric, polyethylene nonwoven fabric, nylon nonwoven fabric, polyester nonwoven fabric, bicomponent yarn mixed with polypropylene and polyethylene, polypropylene yarn, polyethylene yarn, viscose yarn, polyester yarn and nylon It can be used by giving extensibility to nonwoven fabric having a capacity of 5 ~ 180g / ㎡ including nonwoven fabric, airlaid nonwoven fabric, air through nonwoven fabric, spunlace nonwoven fabric, cotton yarn nonwoven fabric made by mixing one or more of the yarns. In consideration of price, function, and the like in the present invention, polypropylene spunbond nonwoven fabric or nonwoven fabric provided with extensibility to polypropylene spunbond and melt blown nonwoven fabric formed of a multilayer is suitable. Necking the nonwoven fabric to impart extensibility implies extensibility in the necking direction. The extensible nonwoven fabric uses a nonwoven fabric imparting first axis elongation, a nonwoven fabric imparting second axis elongation, and a nonwoven fabric imparting first and second axis extensibility.

2. Fabrication of Elastic Nonwovens

An elastic body is added to the stretchable nonwoven fabric to prepare an elastic nonwoven composite.

Elastic polymer coatings that can be used in this invention are hot melt coatings, fat soluble coatings, water-soluble coatings.

The oil-soluble coating agent is an elastomeric copolymer comprising an olefin-based monomer such as ethylene-vinyl acetate copolymer, natural rubber, styrene copolymer, ethylene, propylene, butene and the like in one or more solvents of toluene, ethyl acetate, methyl-ethyl-ketone It is made by melting a material containing water, polyurethane and synthetic rubber. The materials are polymers that retain elasticity and are thermally adhesive when laminated with a nonwoven fabric. The water-soluble elastic polymer coating agent is a coating agent in which the elastic polymer is dispersed in water or alcohol, acrylic coating agent; Polyester-based coating agent dispersed in water or alcohol; Nitrocellulose-based coatings dispersed in water or alcohol; Among the polyamide-based coatings dispersed in water or alcohol, materials having elasticity are selected and used. In water-soluble coatings, the polymer dispersed in the coating solution should select a polymer having good thermal adhesion when laminated with the nonwoven fabric. The hot melt coating polymer coated in the molten state uses an elastic polymer used in the fat-soluble coating or the water-soluble coating.

In this invention, the elastic coating agent should have a thermal adhesiveness for laminating the nonwoven fabric after being coated on one side of the nonwoven fabric. If the elastic coating lacks such a secondary adhesive function, a separate adhesive must be used when laminating the elastic nonwoven fabric, thereby increasing the production cost of the product.

The elastic coating agent is coated by spraying on one surface of the nonwoven fabric, or by applying a roll coating including a gravure roll coating to impart an elastic body to one surface of the nonwoven fabric, or by attaching an elastic body formed on a release paper to the surface of the nonwoven fabric to attach the elastic body to the surface of the nonwoven fabric. The elastic body imparted to the surface of the nonwoven fabric is a choking elastic body forming an elastic membrane, and a breathable elastic layer given in a predetermined pattern. In addition, the elastic polymer may be sprayed on the surface of the nonwoven fabric to impart an elastic layer.

1 is a state diagram in which an elastic body is coated on one surface of a nonwoven fabric with gravure coating rolls 31 and 32. By selecting the groove depth (capacity) of the bottom roll surface immersed in the coating liquid 21 of the coating rolls 31 and 32, the coating amount of the nasal solution imparted to the stretchable nonwoven fabric 11 can be adjusted, and the dog knife 33 The adhesion can be adjusted by selecting. The coating method of FIG. 1 may coat an elastic body on a nonwoven fabric in a breathable pattern. When the dipping method is employed, the elastic nonwoven fabric 11 is coated with the elastic nonwoven fabric 11 by passing the stretchable nonwoven fabric 11 between the two rolls 41 and 42 immersed in the coating liquid 21 as shown in FIG. The coating method of FIG. 2 is suitable for coating a coating dispersed in alcohol, that is, a coating having a low viscosity. Other coating methods cited in FIG. 3 provide a thin film on the surface of the stretchable nonwoven fabric 11 moving on the guide roll 52 in the comma coater 51 and the die, or in which a constant gap is maintained. While moving the stretchable nonwoven fabric between the main rolls, the coating agent is supplied in a thin film and coated, and the coating amount is controlled by controlling the supply amount of the coating agent.

3. Lamination of elastic nonwoven

Since the elastic polymer provided on one side of the nonwoven fabric has heat adhesiveness (approximately melting temperature 120 degrees Celsius), the elastic nonwoven fabric and the elastic nonwoven fabric, or the elastic nonwoven fabric and the nonwoven fabric can be easily laminated.

4 is a device diagram for thermally bonding the composite layer 10 having two sheets of elastic layers so that the elastic layers 12 abut. Specifically, two sheets of the elastic nonwoven fabric composite 10 having the elastic layer 12 formed on the stretchable nonwoven fabric 11 are heated and pressed between the heating roll 61 and the compressed rubber roll 62 to be laminated. The laminated state is the elastic nonwoven composite body 10a in which the elastic body layers 12 and 12 are sandwiched between the extensible nonwoven fabrics 11 on both sides of which the extension axes are aligned.

5 is a device diagram for laminating the stretchable nonwoven fabric 11 on one surface of the elastic nonwoven fabric composite 10. Specifically, the elastic nonwoven fabric composite fabric 10 and the nonwoven fabric 11 in which the elastic layer 12 is formed on the stretchable nonwoven fabric 11 are heated and pressed between the heating roll 61 and the compressed rubber roll 62 to be laminated. The laminated state is the elastic nonwoven composite body 10b in which the breathable elastic layer 12 is sandwiched between the two sides of the nonwoven fabric 11 having the same extension axis.

4. Materials to give additional functions

1) Addition of far infrared radiation function

The elastic nonwoven composite of the present invention is mainly used as a material for producing personal goods. It is known that the addition of far infrared radiation to a nonwoven fabric improves skin affinity. The present invention may add materials to improve the skin affinity to the elastomeric coating composition. Materials for improving skin affinity are inorganic materials including elvan, biotite, talc, inorganic antibacterial agent, barium sulfate, jade powder, zeolite, activated carbon, silica and charcoal powder.

2) addition of deodorizing or fragrance function

 The present invention may include a deodorant or a odorant in the elastic polymer coating composition to add a deodorant function or a odor function. Examples of the deodorant are inorganic deodorants including elvan, biotite, talc, and inorganic antibacterial agents, and absorbents of zeolite, activated carbon, silica gel and silica.

5. Manufacture of diaper cover

The present invention manufactures a diaper cover from the elastic nonwoven composite 10 or the sandwich elastic nonwoven composite 10a, 10b prepared as described above. An embodiment of the elastic nonwoven composite diaper cover design in consideration of the present invention elongation axis is cited in FIG. Fig. 6 (A) is a schematic isometric view of the panties and Fig. 6 (B) shows the front plate a and the back plate b of the panties in the transverse (X-axis) direction of the nonwoven fabric and the base plate c in the longitudinal direction of the Y-axis) direction.

The diaper cover by the elastic nonwoven composite is made of a panty cover and a spread cover. Fig. 7A is a plan view of the developed diaper cover 71 of the present invention, and Fig. 7B is a bottom view of the same diaper cover 71. Figs. Dividing waistbands 72 and 73 provided at both ends of the deployable cover 78 in FIGS. 7, 8 and 9; Velcro tape loop loop 74 attached to one side of the waist band 73; Hook piece 75 of the Velcro tape attached to both ends of the other waist band 72; A leg insertion portion 76 is formed at both sides; In use, the loop band 74 of the velcro tape and the hook piece 75 of the velcro tape are adhered to each other, and the bisected waist bands 72 and 73 are gathered and worn. The expanded diaper cover 71 is made of the elastic nonwoven composite according to the present invention; The diaper cover 71 is provided with a means for attaching the disposable diaper 87 to the inner diaper attaching portion 83.

One embodiment of the diaper attachment means provided in the diaper cover is a hook belt 84 of velcro tape bonded to the nonwoven fabric 86 of the diaper 87. The hook strip 84 is sealed to the inner surface of the cover or attached with an adhesive (85). Coupling the hook strip 84 and the diaper 87 allows the hook to penetrate between the diaper fibers 86 and attach the diaper 87 to the cover 71. The hook strip attaching means may be manufactured by attaching a hook strip to the back surface of the diaper and retaining the nonwoven surface on the diaper cover. The pressure-sensitive adhesive material for adhesively supporting the back surface of the diaper 87 is applied to the diaper attachment portion 83 by other attachment means. Fig. 10 is a diaper cover of another embodiment of this invention. A panty-type diaper cover 71a having a waist band 72a and a leg insertion portion 76a is made of the elastic nonwoven fabric composite according to the present invention, and the hook band of the velcro tape is described in the diaper attachment portion 83 as described above. Attach (84). The attachment means is attached by means of an adhesive material 85 or by sealing.

Example 1

30 parts by weight of an elastic polymer (Shell KRATON D1102) was dissolved in 70 parts by weight of toluene to prepare an elastic coating agent. The elastic coating prepared was repeatedly coated three times on the entire necking nonwoven fabric in a gravure roll. The capacity of the network elastomer after 3 coating dryings was 9 g / m 2.

Example 2

The elastic nonwoven fabric of Example 1 was laminated by sticking a network elastic body so that its elongation axis was matched and heat-pressing it in a paper roll. The heating temperature of the paper roll was 150 degrees Celsius and the pressing force of the rubber roll was 45 kg / cm <2>. The capacity of the reticulated body after lamination was 18 g / m 2.

Example 3

The disposable baby diaper cover was made of the elastic nonwoven fabric manufactured in Example 2, and the disposable baby diaper was attached by inserting the hook belt 84 of the Velcro tape of FIG.

As a result of using the diaper of Example 3 as a baby, the elastic nonwoven laminate cover adheres well to the baby, the diaper does not move to the side, the breathability is smooth and the skin affinity is exacerbated to worsen the baby's condition or the baby. Could not find bad signs on the skin.

As described above, the present invention provides an elastic nonwoven composite diaper, wherein the elastic nonwoven composite diaper is preserved breathability, the diaper can be separated from the cover, and the free movement of the diaper during wearing is prevented by using the elastic nonwoven composite. It is flexible and elastic, so it fits well with the baby's body shape and body when worn, it is inexpensive, and can be repeatedly used in several diapers.

Claims (13)

In the diaper cover, an elastic layer is formed on one surface of the nonwoven fabric provided with stretchability to prepare an elastic nonwoven fabric, and the two elastic nonwoven fabrics are bonded to each other so that the elastic bodies are bonded to each other so that the elastic nonwoven fabric composite material is inserted into a sandwich between the nonwoven fabrics. A diaper cover made of said sandwich-like elastic nonwoven composite and for use in a disposable straight diaper. delete delete delete delete delete delete delete delete delete The diaper cover according to claim 1, wherein diaper attachment means is provided in the elastic nonwoven composite diaper cover. The diaper cover according to claim 11, wherein the diaper attachment means is a Velcro tape hook strap attached to the base cover to adhere to the nonwoven fabric on the back side of the diaper. 12. The diaper cover according to claim 11, wherein the diaper attachment means is a Velcro tape hook strap attached to the back side of the diaper to adhere to the nonwoven fabric on the inner side of the diaper cover.

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