WO2004041139A1

WO2004041139A1 - Forming leakage prevention layer for diaper

Info

Publication number: WO2004041139A1
Application number: PCT/KR2003/002373
Authority: WO
Inventors: Sang Yong Kim
Original assignee: Sang Yong Kim
Priority date: 2002-11-08
Filing date: 2003-11-07
Publication date: 2004-05-21
Also published as: KR20020087925A; AU2003276748A1

Abstract

The present invention relates to an apparatus for forming a leakage prevention layer of a diaper for thereby enhancing productivity in such a manner that a leakage prevention layer of a diaper is easily provided, and a flow of diaper fabrication line is enhanced. There is provided an apparatus for forming a leakage prevention layer for a diaper comprising a bending unit that includes a pair of guide plates for guiding a feeding of the hydrophobic non-woven fabric in which the elastic band is provided in an edge portion of one side, and a bending plate adapted for bending an edge portion of one side of the hydrophobic non-woven fabric, and a compression unit adapted for compressing an edge portion of one bent side of the hydrophobic non-woven fabric that is fed through the bending unit.

Description

FORMING LEAKAGE PREVENTION LAYER FOR DIAPER

BACKGROUND OF THE INVENTION

1. Field of the Invention

The present invention relates to an apparatus for forming a leakage

prevention layer for a diaper that is generally installed in a diaper fabrication line

capable of fabricating a diaper for babies, old people suffering from dementia

who do not know how to go to stool or urinate or adult who is not capable of

walking, and in particular to an improved apparatus for forming a leakage

prevention layer for a diaper capable of preventing any interference of a foreign

substance such as an adhesive, etc. by simplifying the construction of a

leakage prevention layer forming apparatus capable of bending a corner of a

diaper leakage prevention layer into which an elastic band such as an elastic

cord is inserted and attached to be closely contacted with a user's skin for

thereby implementing a good corner bending of a leakage prevention layer and

enhancing a productivity by obtaining a smooth operation of a diaper fabrication

line.

2. Description of the Background Art

Generally, as shown in Figure 1 , a leakage prevention layer forming

apparatus provided in a diaper fabrication line includes an inclination plate provided in parallel with respect to a feeding surface of a leakage prevention

layer.

The conventional leakage prevention film forming apparatus includes an

inclination plate 10 that is provided in parallel at a certain distance from one side

of a guide plate 20 by which a hydrophobic non-woven fabric forming a leakage

prevention layer is fed.

As shown in Figure 1 , the leakage prevention layer forming apparatus is

formed in a triangle plane shape structure having an inclined upper side. The

leakage prevention layer forming apparatus is bolt-engaged in one side of the

guide plate 20 having the inclination plate 10 in a lower side having an angled

vertical cross section, so that the distance between the inclination plate 10 and

the guide plate 20 is adjusted, and the bending width of the hydrophobic non-

woven fabric 60 is adjusted.

In addition, in the case that the width of one side of the hydrophobic

non-woven fabric having an elastic band 70 is formed narrower, it is needed to

lower the inclination plate 10. In the case of forming wider, it is needed to lift the

inclination plate 10 for thereby making a wider bent surface.

Namely, the hydrophobic non-woven fabric 60 that is fed at a certain

speed is fed along an engaging portion of the inclination plate 10 and the guide

plate 20, and one side of the same is bent along a slanted side surface of the

inclination plate 10 for thereby forming a bending line having a certain width. The elastic band 70 provided in a portion that will be bent by an

adhesive sprayed before the bending is performed is attached to the

hydrophobic non-woven fabric 60 bent by the inclination plate 10, and the bent

hydrophobic non-woven fabric 60 is bent based on a certain tension force

during the feeding operation.

However, in the above forming apparatus, an adhesive sprayed for

providing an elastic band in the bending portion may be accumulated in the

guide plate and inclination plate by contact with the hydrophobic non-woven

fabric that is bent when it passes between the guide plate and the inclination

plate provided in parallel with respect to the guide plate for thereby interfering a

desired feeding operation of the hydrophobic non-woven fabric, so that a

productivity is decreased.

In addition, the bending surface of the hydrophobic non-woven fabric

that is bent and fed between the guide plate and the inclination plate may

become dirty by foreign substances such as an adhesive gathered in the guide

plate and inclination plate.

SUMMARY OF THE INVENTION

Accordingly, it is an object of the present invention to provide an

apparatus for forming a leakage prevention layer for a diaper that overcomes

the problems encountered in the conventional art. It is another object of the present invention to provide an apparatus for

forming a leakage prevention layer for a diaper that is capable of enhancing

productivity by implementing an efficiency feeding of a hydrophobic non-woven

fabric by decreasing a gathering of adhesive.

It is further another object of the present invention to provide an

apparatus for forming a leakage prevention layer for a diaper that is capable of

maintaining a bending surface of a hydrophobic non-woven fabric clean by

decreasing a gathering of foreign substances such as an adhesive, etc.

To achieve the above objects, in an apparatus for forming a leakage

prevention layer for a diaper by bending an edge portion of a hydrophobic non-

woven fabric and providing an elastic band, there is provided an apparatus for

forming a leakage prevention layer for a diaper comprising a bending unit that

includes a pair of guide plates for guiding a feeding of the hydrophobic non-

woven fabric in which the elastic band is provided in an edge portion of one side,

and a bending plate provided in the opposite surfaces of the guide plate in an

upward direction for bending an edge portion of one side of the hydrophobic

non-woven fabric, and a compression unit that is provided at a certain distance

from the bending unit for compressing an edge portion of one bent side of the

hydrophobic non-woven fabric that is fed through the bending unit.

BRIEF DESCRIPTION OF THE DRAWINGS The present invention will become better understood with reference to

the accompanying drawings which are given only by way of illustration and thus

are not limitative of the present invention, wherein;

Figure 1 is a perspective view illustrating a diaper fabrication apparatus

5 having a conventional leakage prevention layer forming apparatus for a diaper;

Figure 2 is a perspective view illustrating a diaper fabrication apparatus

having a leakage prevention layer forming apparatus according to an

embodiment of the present invention;

Figure 3A is an enlarged partial perspective view illustrating a bending

0 unit of a leakage prevention layer forming apparatus according to the present

invention;

Figure 3B is a cross sectional view taken along line A-A' of Figure 2;

Figure 4 is a front view illustrating a compression unit of a leakage

prevention layer forming apparatus for a diaper according to the present

15. invention; and

Figure 5 is a cross sectional view illustrating a bending unit for a leakage

prevention film forming apparatus for a diaper according to another embodiment

of the present invention.

20 DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

The preferred embodiments of the present invention will be described with reference to the accompanying drawings.

Figure 2 is a perspective view illustrating a diaper fabrication apparatus

having a leakage prevention layer forming apparatus according to an

embodiment of the present invention, Figure 3A is an enlarged partial

perspective view illustrating a bending unit of a leakage prevention layer

forming apparatus according to the present invention, Figure 3B is a cross

sectional view taken along line A-A' of Figure 2, Figure 4 is a front view

illustrating a compression unit of a leakage prevention layer forming apparatus

for a diaper according to the present invention, and Figure 5 is a cross sectional

view illustrating a bending unit for a leakage prevention film forming apparatus

for a diaper according to another embodiment of the present invention.

As shown in Figures 2 through 5, a leakage prevention layer forming

apparatus 100 for a diaper according to the present invention includes a

bending unit 110 capable of bending an edge portion of one side of a

hydrophobic non-woven fabric 60, and a compression unit 150 capable of

adhering an edge portion of one bent side of the hydrophobic non-woven fabric

60 that passed through the bending unit 110.

In the above leakage prevention layer, an edge portion of one side of

each hydrophobic non-woven fabric 60 provided to be opposite to a pair of

hydrophobic non-woven fabric provided in both sides of a diaper pad 200 is

bent like the elastic band 70 is surrounded. When a user wears the finished diaper, the leakage prevention layer becomes upright and closely contacts with

a user's skin, for thereby preventing any leakage of secretion.

The fabrication of the diaper pad 200 in which the hydrophobic non-

woven fabric 60 having a leakage prevention layer is attached to both sides will

be described. As the pulp formed in a roll is unrolled and is impacted by a

propeller shaped carding machine (not shown), so that the pulp becomes soft

and swelled by a known method. The surface of the pump is swelled by the

above impacting operation for thereby fabricating a cellulous down (hereinafter

called down) having a cushion.

At this time, the dusts generated from the down are gathered by a dust

collector (not shown) through a suction duct (not shown) and a suction drum

(not shown). A plurality of suction holes are formed in an outer surface of the

suction drum. A plate shaped down is formed by the suction force applied to

suck dusts, for thereby preventing any movement. The thusly formed down is

separated by a separation plate (not shown) provided in one side of the suction

drum (not shown) and is packed up with a synthetic resin paper and tissue

coated with a hot melt that is a kind of known adhesive for thereby fabricating a

diaper pad 200.

A high absorption polymer is sprayed to an upper surface of the diaper

pad 200 for thereby effectively absorbing urine or moisture of pollutant. A

semicircular cut portion is provided in both sides, so that the user's legs are inserted thereinto. The diaper pad 200 is cut by a rotary knife (not shown)

provided in the upper and lower sides at a certain length and is fed by a

connection conveyer BC.

In an upper side of the diaper pad 200, there are provided a pair of

hydrophobic non-woven fabrics 60 having a leakage prevention layer formed by

the leakage prevention layer forming apparatus 100 of the diaper, and a

hydrophilic non-woven fabric 50 provided between the hydrophobic non-woven

fabrics 60. A water resistance film 65 is formed in a lower side of the same.

Therefore, the diaper is fabricated through a pair of compression rollers PR.

The leakage prevention later formed in an edge portion of one side of a

pair of the hydrophobic non-woven fabrics 60 provided in both sides of the

upper side of the diaper pad 200 is formed by the leakage prevention layer

forming apparatus 100 of the diaper according to the present invention. The

above leakage prevention layer forming apparatus 100 includes a bending unit

110 capable of bending an edge portion of one side of the hydrophobic non-

woven fabric 60, and a compression unit 150 for adhering a bent portion of the

hydrophobic non-woven fabric 60 passed through the bending unit 110.

As shown in Figures 2 through 4, in the bending unit 110, there is

provided a bending plate 115 in one side opposite to a pair of the guide plates

112 through which a pair of the hydrophobic non-woven fabrics 60 pass at a

certain distance. The bending plate 115 is provided at an inclined angle for thereby forming an acute angle with respect to the plane of the guide plate 112.

An edge portion of one side of the hydrophobic non-woven fabric 60 is bent.

The guide plate 112 has one side downwardly inclined, and the other

side upwardly inclined. One side of the lateral cross section, in which the

downward inclination is formed, is provided in a direction that the hydrophobic

non-woven fabric 60 is supplied, so that a tension state is maintained in the

hydrophobic non-woven fabric 60 supplied from the lower side.

The distance between the guide plates 112 is wider than the distance

between the hydrophobic non-woven fabrics 60. An edge portion of one side of

the hydrophobic non-woven fabric 60 is bent by a bending plate 115 that will be

described later.

Preferably, there may be provided a screw connected with the guide

plate 112 in a frame (not shown) supporting the guide plate 112 for adjusting the

distance between the guide plates 112, and a certain moving unit (not shown)

such as a cylinder, etc. When the distance between the guide plates 112 is

widened by the moving unit (not shown), the bending length of the bending

portion of the hydrophobic non-woven fabric 60 is increased, and when the

distance between the guide plates 112 is decreased, the bending length of the

bending portion of the hydrophobic non-woven fabric 60 is decreased.

There is provided a bending plate 115 formed in one side in which a pair

of the guide plates 112 are opposite to each other, namely, in an inner side of each guide plate 112 having a certain distance. The bending plate 115 is formed

upwardly with respect to a feeding direction of the hydrophobic non-woven

fabric 60 passed through a downward inclination portion of the guide plate 112.

As shown in Figures 3 and 5, the bending plate 115 is formed at an acute angle

with respect to the plane of the guide plate 112. Preferably, the bending plate

115 maintains above 45° and may have a right angle.

As shown in Figure 5B, the bending plate 115 may easily surround the

elastic band 70 provided in the bent portion of the hydrophobic non-woven

fabric 60 because one side, namely, inner side of the hydrophobic non-woven

fabric 60 is easily bent even when the guide plate 112 is inwardly curved.

The lateral cross section of the bending plate 115 is formed in a triangle

shape in which the lateral cross section is gradually increased in the feeding

direction of the hydrophobic non-woven fabric 60. It is possible to minimize a

certain interference during the feeding by the bending plate 115 that occurs in

the hydrophobic fabric 60 fed along the inclination surface of the guide plate 112

for thereby implementing an efficient supply. One side of the hydrophobic non-

woven fabric 60 more inwardly protruded than the bending plate 115, namely,

the inner side of each hydrophobic fabric 60 in which a pair of the hydrophobic

non-woven fabric 60 are opposite to each other is gradually widened from the

plane of the guide plate 112 for thereby being easily bent by the bending plate

115. The elastic band 70 is provided in the bending portion of the

hydrophobic non-woven fabric 60 passed through the bending unit 110 formed

of the guide plate 112 and the bending plate 115. The elastic band 70 is

provided at a certain distance from the guide plate 112 before it is provided in

the bending portion of the hydrophobic non-woven fabric 60 fed to the guide

plate 112. The hydrophobic non-woven fabric passes through a first nozzle 181

capable of spraying adhesive on the bending portion of the hydrophobic non-

woven fabric 60. The elastic band is fed to an edge portion of one side of the

hydrophobic non-woven fabric 60 and is bent by the bending plate 115 in a state

that an adhesive is sprayed thereto.

One side of the hydrophobic non-woven fabric 60 bent by the bending

unit 110 has an acute angle with respect to the plane of the hydrophobic non-

woven fabric 60. The bent hydrophobic non-woven fabric 60 is continuously

bent and has a tension state by the tension roller 160 of the compression unit

150 for thereby forming an acute angle state. As the bent portion of the

hydrophobic non-woven fabric 60 comes close to the tension roller 160, the

bent portion is overlaid with the plane of the hydrophobic non-woven fabric 60.

As shown in Figures 2 and 4, the hydrophobic non-woven fabric 60

having an edge portion bent to surround the elastic band 70 by the bending unit

110 is most tensioned by the compression unit 150 installed at a certain

distance in a feeding direction of the hydrophobic non-woven fabric 60, so that the bending portion of the hydrophobic non-woven fabric 60 is overlaid with the

plane of the hydrophobic non-woven fabric 60, and the bent portion overlaid

with the plane is compressed with the elastic band 70 therein.

The compression unit 150 adapted to compress the bending portion of

the hydrophobic non-woven fabric 60 having the elastic band 70 therein

includes a pair of distance adjusting members 165 that are stepped for

maintaining a distance with the hydrophobic fabric 60. A tension roller 160 is

provided for maintaining a certain height matching with the inclined surface of

the other side of the guide plate 112 for thereby implementing a certain tension

of the hydrophobic non-woven fabric 60. There is further provided a

compression rod 156 that is adjustable for obtaining a certain height in the

upper side of the tension roller 160 and has a compression plate 158 capable of

compressing the bending portion of the hydrophobic non-woven fabric 60. A

support frame 152 has a support body 154 having a through hole 155 for

thereby being movable upwardly and downwardly in cooperation with the

compression rod 156.

A pair of the distance adjusting members 164 stepped in the tension

roller 160 are movable in the longitudinal direction of the tension roller 160. In

the case that there is a certain variation in the distance between the bent lateral

sides of a pair of the hydrophobic non-woven fabric 60, the distance between

the distance adjusting members 165 is adjusted, and the tension roller 160 is fixed using a certain engaging member (not shown) such as a screw, etc., so

that it is possible to easily maintain a certain distance between the hydrophobic

non-woven fabrics 60.

In addition, the compression rod 156 having a plate shaped

compression plate 158 is inserted into the through hole 155 of the support body

154. A thread is formed in the through hole 156 and the compression rod 156,

respectively, for thereby implementing an up and down movement. The height

of the compression plate 158 is easily adjusted from the tension roller 160.

Therefore, it is possible to easily compress the bending portion of the

hydrophobic non-woven fabric 60.

The above movement may be implemented using a cylinder capable of

controlling an up and down movement of the compression rod 156.

A pair of the support bodies 154 each having the compression rod 156

installed are movably installed in the support frame 182. The bending portion

may be easily compressed by the compression plate 158 provided in a lower

side of the compression rod 156 by adjusting the distance of the support body

154 with respect to the distance between the bent lateral sides of the

hydrophobic non-woven fabric 156 which are varied by adjusting the distance

between the guide plates 112.

The hydrophobic non-woven fabric 60 having a leakage prevention

layer formed by the bending unit 110 and the compression unit 150 is stably adhered by an adhesive sprayed from a second nozzle 182 installed at a certain

distance. A hydrophilic non-woven fabric 50 is adhered between a pair of the

hydrophobic non-woven fabric 60 each having a leakage prevention layer by an

adhesive sprayed from a third nozzle installed at a certain distance from the

second nozzle 182. The resultant structure is provided in an upper portion of the

diaper pad 200.

When the leakage prevention layer is formed in the hydrophobic non-

woven fabric 60 by the forming apparatus 100, the foreign substances

accumulated on the guide plate 112 and the bending plate 115 due to an

adhesive sprayed before the elastic band 70 is provided in the bending portion

of the hydrophobic non-woven fabric 60 is decreased, so that it is possible to

implement a smooth feeding and clean bent surface.

As described above, in the present invention, it is possible to enhance

productivity by decreasing an accumulation of foreign substances such as an

adhesive, etc. and implementing an efficient feeding of the hydrophobic non-

woven fabric.

In addition, it is possible to obtain a clean bended surface of the

hydrophobic non-woven fabric by decreasing an accumulation of foreign

substances such as an adhesive, etc.

As the present invention may be embodied in several forms without

departing from the spirit or essential characteristics thereof, it should also be understood that the above-described examples are not limited by any of the

details of the foregoing description, unless otherwise specified, but rather

should be construed broadly within its spirit and scope as defined in the

appended claims, and therefore all changes and modifications that fall within

the meets and bounds of the claims, or equivalences of such meets and bounds

are therefore intended to be embraced by the appended claims.

Claims

What is claimed is:

1. In an apparatus for forming a leakage prevention layer for a diaper by

bending an edge portion of a hydrophobic non-woven fabric and providing an

elastic band, an apparatus for forming a leakage prevention layer for a diaper,

comprising:

a bending means that includes a pair of guide plates for guiding a

feeding of the hydrophobic non-woven fabric in which the elastic band is

provided in an edge portion of one side, and a bending plate provided in the

opposite surfaces of the guide plate in an upward direction for bending an edge

portion of one side of the hydrophobic non-woven fabric; and

a compression means that is provided at a certain distance from the

bending means for compressing an edge portion of one bent side of the

hydrophobic non-woven fabric that is fed through the bending means.

2. The apparatus of claim 1, wherein one side of the lateral cross section

of the guide plate is inclined in a downward direction that the hydrophobic non-

woven fabric is fed, and the other side of the same is upwardly inclined, so that

one side and the other side of the same form an obtuse angle, and a lateral

cross section of the bending plate upwardly provided in the other side of the

guide plate is formed in a triangle shape in such a manner that the other side of

the same is gradually widened in a direction that the hydrophobic non-woven fabric is fed.

3. The apparatus of claim 1 , wherein said compression means includes:

a tension roller provided in a lower side of the hydrophobic non-woven

fabric for thereby forming a certain tension force of the hydrophobic non-woven

fabric that is fed through the bending means;

a compression rod having a compression plate in a lower side, said

compression plate being adjustably provided in an upper side of the tension

roller at a certain interval for thereby compressing an edge portion of one bent

side of the hydrophobic non-woven fabric; and

a support frame in which a pair of support bodies are movably installed

in a longitudinal direction, a through hole being formed in each of the support

bodies, said compression rod being inserted into the through hole movably in

the upward and downward directions.

4. The apparatus of claim 2, wherein said bending plate is provided in an

upward direction at an inclined angle for thereby forming an acute angle with

respect to a plane of the guide plate.

5. The apparatus of claim 3, wherein said tension roller includes a

distance adjusting member that is bent and is movable in a longitudinal direction in a stepped shape for thereby adjusting a distance between the hydrophobic

non-woven fabrics.