TWI701143B - Manufacturing method of composite sheet - Google Patents

Abstract

The present invention provides a method for manufacturing a composite sheet, which can easily manufacture a composite sheet having a part with a large stretching force and a part with a small stretching force in the machine direction.

The method of manufacturing the composite sheet (106) includes: (a) a step of fixing a continuous elastic body (103) extending in the machine direction (MD) to the first sheet (101) conveyed in the machine direction (MD), ( b) The step of cutting a part of the continuous elastic body (103) fixed to the first sheet (101) at intervals in the machine direction (MD), and (c) in the first sheet (101) and A step of joining the first sheet (101) and the second sheet (102) to each other in a state where the continuous elastic body (103) is interposed between the second sheets (102).

Description

Manufacturing method of composite sheet

The present invention relates to a method of manufacturing a composite sheet.

Conventionally, the method of manufacturing a composite sheet with stretchability is well known. For example, Patent Document 1 discloses a method of manufacturing a composite sheet having stretchability, the composite sheet having a plurality of convex portions arranged beautifully.

[Prior technical literature] 〔Patent Literature〕

[Patent Document 1] JP 2009-160919 A

In the composite sheet of the invention disclosed in Patent Document 1, it is not easy to manufacture a composite sheet having a portion with a large stretching force and a portion with a small stretching force in the machine direction.

The subject of the present invention is to provide a method of manufacturing a composite sheet, which can easily manufacture a part with a large stretch force in the machine direction And the composite sheet of the part with small stretching force.

In order to solve the aforementioned problems, the present invention is a method of manufacturing a composite sheet, including: (a) a step of fixing a continuous elastic body extending in a machine direction to a first sheet conveyed in the aforementioned machine direction, and (b) being fixed The step of cutting a part of the continuous elastic body in the first sheet at intervals in the machine direction, and (c) interposing the continuous elastic body between the first sheet and the second sheet A step of joining the first sheet and the second sheet to each other.

In the step b, the size of the remaining portion of the continuous elastic body in the cut portion in the cross direction crossing the machine direction is smaller than the size of the continuous elastic body without the cut portion in the cross direction. Therefore, in the cut portion of the continuous elastic body, the size in the cross direction becomes smaller. Therefore, a strip of continuous elastic body may have a portion with a large elastic force and a portion with a small elastic force. Therefore, it is possible to easily manufacture a composite sheet having a part with a large stretching force and a part with a small stretching force in the machine direction.

In the step b, at least one of a part of the continuous elastic body and the first and second sheets overlapping the continuous elastic body in the thickness direction is cut by a cutting tool. The length dimension in the direction is smaller than the dimension of the continuous elastic body in the cross direction. Therefore, it is possible to provide a composite sheet with a small area of the cut portion of the first sheet and the second sheet.

In the step b, a part of the continuous elastic body and at least one of the first sheet and the second sheet overlapped with the continuous elastic body in the thickness direction and the continuous elastic body are connected to the At least one of the first sheet and the second sheet that do not overlap in the thickness direction is cut, and the length dimension of the cutting tool in the intersection direction is larger than the dimension of the continuous elastic body in the intersection direction. Therefore, it is possible to provide a composite sheet having a wide area of the cut portion of the first sheet and the second sheet.

After the adhesive is applied to the peripheral surface of the continuous elastomer, in the c step, the continuous elastomer is fixed to the first sheet and the second sheet by the adhesive, and in the b after the c step In the step, a part of the continuous elastic body is cut by the cutting tool. Thereby, since the continuous elastic body fixed to the first sheet and the second sheet are cut, the accuracy of the cut portion of the continuous elastic body can be improved.

In the step b, a part of the continuous elastic body is cut by the cutting tool on the inner side of the both side edges of the continuous elastic body in the crossing direction. Therefore, the cutting end of the continuous elastic body will not be generated in the step of cutting the continuous elastic body, so the composite sheet does not include the cut end, and the appearance of the composite sheet can be improved.

The cutting tool is fixed to the base part in a manner inclined to the machine direction. Therefore, when the continuous elastic body is cut, the force applied to the base portion can be dispersed in the machine direction.

In the step b after the step a and the step c, the cut portion is formed in the first sheet and the second sheet, and after (d) the step b, in the first sheet and the second sheet The least one is provided with a step of fixing and laminating a waterproof third sheet. Therefore, the first sheet and the second sheet have cut portions and have air permeability, and the third sheet does not have cut portions, so that waterproofness can be maintained and a multifunctional composite sheet can be provided.

According to the method of manufacturing a composite sheet according to one or more embodiments of the present invention, since the stretching force at the cut part becomes smaller, and the stretching force at the non-cutting part becomes larger than the cut part, a continuous elastic body can have elasticity Large parts and parts with small elasticity. Therefore, according to the present invention, it is possible to easily manufacture a composite sheet having a portion with a large elastic force and a portion with a small elastic force in the machine direction.

101‧‧‧First slice

102‧‧‧Second sheet

103‧‧‧Continuous elastomer

103a‧‧‧Both sides

105‧‧‧The rest

106‧‧‧Composite sheet

109‧‧‧The third slice

110‧‧‧Transportation Department

120‧‧‧Continuous elastomer fixing part (a step)

130‧‧‧Cut off (step b)

131‧‧‧Tools

132a‧‧‧Base

140‧‧‧Joint (step c)

MD‧‧‧machine direction

CD‧‧‧Cross direction

The drawings show specific embodiments of the present invention related to the present disclosure, and are not only indispensable components of the invention, but also include alternative and preferred embodiments.

Fig. 1 is a schematic configuration diagram of a manufacturing apparatus of a composite sheet for implementing the manufacturing method of the present invention.

Fig. 2 is a perspective view of the manufacturing device of the composite sheet.

Fig. 3 is a plan view of the first sheet after passing through the continuous elastic body fixing portion (a step).

Figure 4 is the continuous elastic body and the first sheet in the cross direction at the cutting part Enlarged cross-sectional view of.

Fig. 5 is a development view in which the circumferential surface of the cutting roller is expanded in the machine direction and the cross direction in order to show the arrangement of the cutters of the cutting roller.

Fig. 6 is a plan view of the first sheet after passing through the cutting portion (step b).

Fig. 7 is a plan view of the composite sheet after passing through the joint (step c).

Fig. 8 is a cross-sectional view of the arrow view VIII-VIII of Fig. 7.

Fig. 9 is a development view similar to Fig. 5 showing Modification 1 of the cutting roller.

Fig. 10 is a plan view of a composite sheet obtained by the manufacturing apparatus having a cutting roller shown in Fig. 9.

Fig. 11 is a perspective view showing Modification 2 of the cutting roller.

Fig. 12 is a plan view showing a composite sheet obtained by a manufacturing apparatus having a cutting roll of Modification 2 in which the arrangement of the cutters is changed.

Fig. 13 is a plan view showing a composite sheet obtained by a manufacturing apparatus having a cutting roll of Modification 3 in which the arrangement of the cutter is changed.

Fig. 14 is a plan view showing a composite sheet obtained by a manufacturing apparatus having a cutting roll of Modification 4 by changing the arrangement of the cutters.

Fig. 15 is a plan view showing a composite sheet obtained by a manufacturing apparatus having a cutting roll of Modification 5 where the arrangement of the cutter is changed.

FIG. 16 is a plan view showing a composite sheet obtained by a manufacturing apparatus having a cutting roll of Modification 6 in which the arrangement of the cutter is changed.

Figure 17 is the cutting of the manufacturing device with the cutter in the second embodiment Broken part, enlarged cross-sectional view of the continuous elastic body and the first sheet in the cross direction.

Fig. 18 is a schematic configuration diagram of the manufacturing apparatus of the third embodiment.

Fig. 19 is a schematic configuration diagram of a manufacturing apparatus of Modification 1 of the third embodiment.

Fig. 20 is a front view showing the front and back waist regions using the composite sheet.

Fig. 21 is an enlarged view of a part of the front and rear waist regions.

Fig. 22 is a perspective view of the disposable wearing article (paper diaper) using the composite sheet of the present invention viewed from the front.

Fig. 23 is a partially cut and developed view of the paper diaper in a state where each elastic body is stretched in the longitudinal direction and the lateral direction of the paper diaper.

The following embodiments relate to the method of manufacturing the composite sheet 106 shown in FIGS. 1 to 19 of the present invention, and are not only indispensable constitutions of the invention, but also include optional and preferable constitutions.

<First Embodiment>

1 and 2, the manufacturing apparatus 100 of the composite sheet 106 that implements the method of manufacturing the composite sheet 106 of this embodiment has: the machine direction (conveying direction) MD of the first sheet 101 of the continuous sheet and the machine direction The cross direction CD orthogonal to MD and the thickness direction Z orthogonal to the machine direction MD and the cross direction CD, respectively. The manufacturing apparatus 100 is described from the upstream side to the downstream side in the machine direction MD, including: transport The part 110 conveys the first sheet 101; the continuous elastic body fixing part (a step) 120 supplies the continuous elastic body 103 coated with an adhesive on the peripheral surface to the first sheet 101 and extends the continuous elastic body in the machine direction MD The elastic body 103 is fixed to the upper surface of the first sheet 101; the cutting part (step b) 130 is to cut a part of the continuous elastic body 103 fixed to the first sheet 101 at intervals in the machine direction MD to form a cut Part (through hole) 104a; and the joining part (step c) 140, the second sheet 102 of the continuous sheet is supplied to the upper surface of the first sheet 101, and there is a continuous sheet between the first sheet 101 and the second sheet 102 The state of the elastic body 103 joins the first sheet 101 and the second sheet 102 to each other.

The continuous sheets of the first and second sheets 101 and 102 are, for example, those having a thickness of 0.3 to 1.0 mm and a basis weight of 15 to 30 g/m ² continuous in the machine direction MD. The continuous sheet can use, for example, SMS (spunbond‧meltblown‧spunbond) fiber nonwoven fabric, spunbonded fiber nonwoven fabric or hot air fiber nonwoven fabric, or plastic sheet, perforated plastic sheet and such laminated sheets.

The continuous elastic body 103 may be linear, strand-shaped, or ribbon-shaped. The continuous elastic body 103 has a fineness of 450 to 1240 dtex, and is fixed to at least the first sheet 101 in a state of being stretched from a contracted or relaxed state to 1.5 to 3.5 times.

<Transportation Department 110>

The conveying unit 110 has a conveying roller 111 for conveying the first sheet 101 in the machine direction MD. The illustration is omitted, but the conveying part 110 may be provided in plural, or may be arranged after the joining part 140. And, the conveying part 110 is composed of a The conveyance rollers are configured so that the first sheet 101 passes between the pair of conveyance rollers, and the first sheet 101 may be conveyed in the machine direction MD by the rotational drive of one of the pair of conveyance rollers.

<Continuous elastomer fixing part 120 (a step)>

The continuous elastic body fixing portion 120 is composed of a first roller 121 located above and a second roller 122 located below in the thickness direction Z, that is, a pair of rollers 121 and 122. The continuous elastic body 103 coated with an adhesive such as a hot melt adhesive and the first sheet 101 are supplied to the peripheral surface, and the continuous elastic body 103 is pressed against the first sheet 101 to extend the continuous elastic body 103 in the machine direction MD Fixed to the first sheet 101.

FIG. 3 is a plan view of the first sheet 101 after passing through the continuous elastic body fixing portion 120. As shown in FIG. 3, the size of the first sheet 101 in the cross direction CD is L1, and ten continuous elastic bodies 103 are fixed to the upper surface of the first sheet 101, respectively. The plurality of continuous elastic bodies 103 are arranged at intervals in the cross direction CD, for example, arranged at equal intervals.

<cutting part 130 (b step)>

As shown in FIG. 2, the cutting portion 130 includes a cutting roller 132 having a plurality of cutters (cutting tools) 131 on the peripheral surface. In the cross direction CD, ten cutters 131 are arranged on the circumferential surface of the roller, and plural cutters 131 are arranged at equal intervals in the circumferential direction, for example. The arrangement interval of the cutter 131 of the cutting roller 132 in the cross direction CD is the same as the interval of the continuous elastic body 103 in the cross direction CD.

And, the cutting portion 130 and the joining portion 140 are in the machine direction MD It has: the third roller 133 on the left in FIG. 2 and the fourth roller 134 on the right in FIG. 2 that is a pair of rollers 133 and 134, and an endless belt 135 straddling the rollers 133 and 134, and has The pressing portion 136 of the first sheet 101 and the continuous elastic body 103 is pressed. The third roller 133 is arranged below the cutting roller 132, and the fourth roller 134 is arranged below the roller 141 of the joining portion 140.

4 is an enlarged cross-sectional view of the continuous elastic body 103 and the first sheet 101 in the cross direction CD in the cutting portion 130, and FIG. 5 is to show the arrangement of the cutter 131 of the cutting roller 132 with the circumferential surface of the cutting roller 132 The expanded view of the machine direction MD and the cross direction CD. The cutters 131 are located in the circumferential direction R (machine direction MD in FIG. 5) and the cross direction CD of the cutting roller 132, and are arranged at equal intervals, for example. 4, the size L11 of each cutter 131 in the cross direction CD is smaller than the size of the continuous elastic body 103 in the cross direction CD (the size of the continuous elastic body 103 in the cross direction CD is not applied to the continuous elastic body 103 Diameter measured in the state). Therefore, if a part of the continuous elastic body 103 is cut by the cutter 131, the central part of the continuous elastic body 103 in the cross direction CD is cut by the cutter 131 to form a cut portion 104a (the continuous elastic body 103 in the cross direction CD The size of is L12), the portion where the cut portion 104a exists loses stretchability, on the other hand, the remaining portion 105 of the continuous elastic body 103 maintains stretchability.

When the continuous elastic body 103 is cut by the cutter 131, because the cut portion (the portion having the cut portion) 104a is formed, the size of the continuous elastic body 103 in the cross direction CD of the cut portion 104a is smaller than The continuous elastic body 103 before forming the cut portion 104a The size in the cross direction CD therefore has a reduced stretch force (elastic force) compared to a portion where the cut portion 104a is not formed. After the cut portion 104a is formed, the size of the remaining portion 105 of the continuous elastic body 103 having the cut portion 104a in the cross direction CD is shown in FIG. 4, the right dimension of the cut portion 104a is L13, and the left side of the cut portion 104a The square size is L14, and the total size of the remaining portion 105 of the continuous elastic body 103 of the cut portion 104a in the cross direction CD is the sum of the size L13 and the size L14, which is compared with the continuous elastic body 103 without the cut portion 104a. In the size of the cross direction CD, the size L12 of the cut portion 104a in the cross direction CD becomes smaller. In the cut portion 104a of the continuous elastic body 103, a part of the first sheet 101 overlapping with the continuous elastic body 103 in the thickness direction Z is also cut, and the cut portion 104b is formed in the first sheet 101.

FIG. 6 is a plan view of the first sheet 101 after passing through the cutting portion 130. The cutters 131 of the cutting roller 132 are arranged at equal intervals in the circumferential direction. Therefore, the cut portion 104a of the continuous elastic body 103 and the cut portion 104b of the first sheet 101 are arranged at intervals in the machine direction MD. In addition, the continuous elastic body 103 is partly cut by a cutter 131 on the inner side of the side edges 103 a in the cross direction CD. Therefore, in the step of cutting the continuous elastic body 103, the cut end of the continuous elastic body 103 will not be generated. Therefore, the composite sheet 106 will not include the cut end of the continuous elastic body 103, and the appearance of the composite sheet 106 can be improved.

<Joint section 140 (c step)>

As shown in Figures 1 and 2, the joining portion 140 is composed of a roller 141 and a pressing portion 136 configuration. Between the roller 141 and the endless belt 135 on the fourth roller 134, the first sheet 101 and the second sheet 102 fixed to the continuous elastic body 103 are fed, and the second sheet 102 is pressed against the first sheet 101 The second sheet 102 is fixed above the first sheet 101 and the continuous elastic body 103 by the adhesive applied on the peripheral surface of the continuous elastic body 103.

FIG. 7 is a plan view of the composite sheet 106 after passing through the junction 140, and FIG. 8 is a cross-sectional view taken along the line VIII-VIII in FIG. The composite sheet 106 is interposed between the first sheet 101 and the second sheet 102 with a continuous elastic body 103. The adhesive applied to the peripheral surface of the continuous elastic body 103 separates the first sheet 101 and the second sheet 102 are joined to each other.

In the part having the cut portions 104a and 104b formed by the cutter 131, the elasticity of the continuous elastic body 103 becomes weak. On the other hand, the part having the non-cut portion without the cut portions 104a and 104b expands and contracts. The force becomes stronger than the part having the cut portions 104a and 104b, and therefore, a strip of continuous elastic body 103 can have a portion with a strong elasticity and a portion with a weak elasticity. In the manufacturing apparatus 100 of this embodiment, the continuous elastic body 103 is continuously extended in the lateral direction X. Therefore, it is not necessary to swing the continuous elastic body 103 in the cross direction CD or to decelerate the first sheet 101 in the machine direction MD. Therefore, the first and second sheets 101 and 102 and the continuous elastic body 103 can be conveyed in the machine direction MD at high speed.

<Modification 1>

FIG. 9 is a development view similar to FIG. 5 showing a modification of the cutting roller 132. The cutting roller 132 connects each cutter 131 to the machine direction MD and cross The fork directions CD are arranged obliquely. Therefore, when cutting the continuous elastic body 103, the force applied to the cutter 131 can be dispersed in the machine direction MD, and the force applied to the base portion 132a of the cutting roller 132 to which the cutter 131 is fixed can be dispersed, thereby suppressing the base The part 132a is damaged.

FIG. 10 is a plan view of the composite sheet 106 obtained by using the manufacturing apparatus 100 equipped with the cutting roll 132 having the cutter 131 shown in FIG. 9. The cutters 131 are arranged obliquely with respect to the machine direction MD and the cross direction CD. Therefore, the cutting portions 104a and 104b of the first sheet 101 and the continuous elastic body 103 formed by the cutter 131 are respectively in the machine direction MD and the cross direction CD. tilt. In addition, if the contact area of the continuous elastic body 103 contacting the cutter 131 is enlarged, the force applied to the cutter 131 can be dispersed. For example, if the size of the cutter 131 in the machine direction MD is increased, and the size in the cross direction CD is increased, the contact area of the continuous elastic body 103 contacting the cutter 131 can be enlarged.

<Modification 2>

FIG. 11 is a perspective view of Modification 2 of the cutting roller 132. As shown in FIG. 11, the cutting roller 132 is in the cross direction CD. In FIG. 11, a tool storage area 131a where five tools 131 exist is arranged on the front side. On the other hand, in FIG. The tool nonexistent area 131b in which the tool 131 is arranged. If the manufacturing apparatus 100 having the cutting roller 132 is used to form the composite sheet 106, as shown in FIG. 12, it is possible to form the composite sheet 106 having the first stretchable region 151 and the second stretchable region 152 in the cross direction CD. The first telescopic area 151 is equipped with a cut-off part The continuous elastic body 103 of 104a, the second stretchable region 152 is provided with the continuous elastic body 103 without the cut portion 104a, and the stretch force is greater than the first stretchable region 151.

<Modification 3>

The illustration is omitted, and the cutting roller system of Modification 3 is alternately arranged in the circumferential direction with the tool existence area where the tool 131 exists and the tool non-existence area where the tool 131 is not arranged. For example, in the circumferential direction of the cutting roller 132, a tool-existing area may be arranged in a half-circumferential part, on the other hand, a tool non-existent area may be arranged in the remaining half-circumferential part. If the composite sheet 106 is formed using such a manufacturing apparatus 100 with a cutting roller, as shown in FIG. 13, a composite sheet 106 in which the first stretchable region 151 and the second stretchable region 152 are arranged in the machine direction MD can be formed. The first expansion and contraction area 151 is provided with a cut portion 104 a on the right in FIG. 13, and the second expansion and contraction area 152 is not provided with a cut portion 104 a on the left in FIG. 13, and the expansion force is greater than the first expansion and contraction area 151.

<Modification 4>

The illustration is omitted. Regarding the arrangement of the cutter 131 of the cutting roller 132, the composite sheet 106 shown in FIG. 14 can be formed according to the manufacturing apparatus 100 with the cutting roller combining the modification 2 and the modification 4 of the modification 3. In FIG. 14, the five continuous elastic bodies 103 below the composite sheet 106 have only a cut portion 104 a on the right side of FIG. 14, and no cut portion 104 a on the left side. And, in Figure 14, the upper 5 continuous elastic bodies 103 are connected to 1 There is no cut part either. Therefore, in FIG. 14, the composite sheet 106 is provided with a cut-off portion 104a in the lower right corner of the four corners. This part is provided with the first expansion and contraction area 151 with weak expansion and contraction force. The second expansion and contraction area 152 is larger than the first expansion and contraction area 151.

<Modification 5>

The illustration is omitted, and the composite sheet 106 shown in FIG. 15 can be formed by the manufacturing apparatus 100 having a cutting roller with cutters 131 arranged in a staggered pattern on the peripheral surface of the cutting roller 132. In the composite sheet 106, the cut portions 104a of the continuous elastic bodies 103 adjacent to each other in the cross direction CD are shifted from each other. The cut portions 104a have a larger interval in the cross direction CD and the machine direction MD. The stretching force of 103 is locally increased.

<Modification 6>

In the above embodiment, the adhesive is applied to the entire circumference of the continuous elastic body 103, and the continuous elastic body 103 is continuous and fixed to the first and second sheets 101 and 102 in the machine direction MD. However, the present invention is not limited to this. For example, the continuous elastomer 103 is alternately arranged in the machine direction MD where the adhesive is applied and the non-coated part is not applied. As shown in FIG. 16, the continuous elastomer 103 may also have a cut The part 104a has a fixed area 153 and a non-fixed area 154. The fixed area 153 (left and right sides in FIG. 16) is continuous and fixed In the first and second sheets 101 and 102, the non-fixed area 154 (the central part in the horizontal direction in FIG. 13) is a part that does not have the cut portion 104a, and is not fixed to the first and second sheets 101, 102. In the non-fixed area 154, if the continuous elastic body 103 is cut across the entire area in the cross direction CD, the non-fixed area 154 becomes an inelastic area where the continuous elastic body 103 does not exist. In addition, as long as the cutting of the continuous elastic body 103 for forming the inelastic region and the cutting of the continuous elastic body 103 to form the cut portion 104a are performed by the cutter 131, the manufacturing apparatus 100 can be simplified.

<Second Embodiment>

FIG. 17 is a cross-sectional view similar to FIG. 4 of the method of manufacturing the composite sheet 106 using the cutting roller 132 according to the first embodiment. The cutter 131 of the cutting roller 132 has a size L15 of the cutter 131 in the cross direction CD that is longer than the size of the continuous elastic body 103 in the cross direction CD.

When the cutting roller 132 is used to cut the continuous elastic body 103 and the first sheet 101, a part of the continuous elastic body 103 and a part of the first sheet 101 overlapping the cut continuous elastic body 103 in the thickness direction Z are removed. The part of the first sheet 101 that is not overlapped with the continuous elastic body 103 in the thickness direction Z is also cut. In other words, the cut portion 104b of the first sheet 101 has a portion 104c overlapping the cut portion 104a of the continuous elastic body 103 in the thickness direction Z, and has a portion 104d that does not overlap the continuous elastic body 103 in the thickness direction Z.

According to the manufacturing apparatus 100 including the cutting roll 132, it is possible to improve The composite sheet 106 having a wide area for the cut portion 104b of the first sheet 101 is provided.

<The third embodiment>

FIG. 18 is a schematic configuration diagram similar to FIG. 1 of the manufacturing apparatus 100 of the third embodiment. The manufacturing apparatus 100 supplies a continuous elastic body 103 coated with an adhesive on the peripheral surface of the first sheet 101 and a second sheet 102. The continuous elastic body 103 is interposed between the first sheet 101 and the second sheet 102. In the state of, the first sheet 101 and the second sheet 102 are joined to each other. In other words, the continuous elastic body fixing portion 120 and the joining portion 140 of the second sheet 102 are shared, and the a step and the c step are performed simultaneously. Then, the cutter 131 of the cutting roller 132 cuts a part of the first and second sheets 101 and 102 and a part of the continuous elastic body 103.

According to the manufacturing apparatus 100, since the continuous elastic body 103 fixed to the first sheet 101 and the second sheet 102 is cut by the cutter 131 of the cutting roller 132, the accuracy of the cut portion of the continuous elastic body 103 can be improved.

In addition, in the manufacturing apparatus 100, the endless belt 135 is spanned across the second roller 122 and the third roller 133 to form a pressing portion 136. In addition, the continuous elastic body 103 is interposed between the first sheet 101 and the second sheet 102, and the first sheet and the second sheet 101, 102 and the continuous elastic body 103 are cut by the cutting roller 132. Parts 104a, 104b, 104c.

<Modification 1>

FIG. 19 is a schematic configuration diagram of Modification 1 of the manufacturing apparatus 100 of the third embodiment. The manufacturing device 100 is a system in which the first and second sheets 101, 102 and the continuous elastic body 103 form a cut part, and then the second sheet 102 is applied on the upper surface of the second sheet 102. The lower surface is coated with an adhesive and does not have the water resistance of the cut part. Thus, the third sheet 109 is fixed to the upper surface of the second sheet 102.

According to this manufacturing apparatus 100, since the first and second sheets 101 and 102 have air permeability and the third sheet 109 does not have a cut portion, the waterproofness can be maintained and the multifunctional composite sheet 106 can be supplied.

In addition, the above-mentioned modification exemplified the use of the third sheet 109 having water resistance, but the present invention is not limited to this, and a third sheet having moisture permeability may be used.

In the composite sheet 106, the number of continuous elastic bodies 103 is not limited to 10, and can be changed arbitrarily. In the plural continuous elastic bodies 103, the fineness and stretch ratio of each continuous elastic body 103 may be the same or different from each other.

The continuous elastic body 103 of the composite sheet 106 of the first to third embodiments, except for the composite sheet 106 of the modification 6 of the first embodiment, is continuous in the machine direction MD, and the composite of the modification 6 of the first embodiment The continuous elastic body 103 of the sheet 106 is continuous in the machine direction MD except for the non-fixed area 154 which is cut.

It is manufactured using the manufacturing device 100 as described above, and in the machine The composite sheet 106 cut into a predetermined length in the direction MD is shown in FIG. 20. As shown in FIG. 20, the composite sheet 106 has a longitudinal direction Y and a transverse direction X intersecting (orthogonal) thereto, and has a first sheet 101 having a cut portion 104b, and a second sheet 102 that does not have a cut portion. , And a plurality of elastic bodies (the continuous elastic body 103 is cut into the latter) 27A, 27B fixed to the first and second sheets 101, 102. When the composite sheet 106 is used as a disposable article (paper diaper 10), the first sheet 101 is positioned on the side facing the skin as the inner sheet 21, and the second sheet 102 is positioned on the non-skin The opposing surface side is used as the outer sheet 23, and the first and second sheets 101 and 102 form the front and rear waist regions 13, 14 (in FIGS. 20 and 21, the rear waist region 14 is illustrated). Since the inner sheet 21 has the cut portion 104b, the air permeability can be improved, and the outer sheet 23 does not have the cut portion, so that the leakage of excrement can be prevented.

The disposable paper diaper 10 using the composite sheet 106 is shown in FIGS. 22 and 23. The paper diaper 10 has a longitudinal direction Y and a transverse direction X intersecting (orthogonal) to it, and includes: a skin-facing surface, a non-skin-facing surface facing the same, and a ring-shaped elastic waist piece extending in the direction around the waist 11. The absorbent base (liquid absorbent structure) 12, the front waist region 13, the back waist region 14, and the crotch region 15 located between the front and rear waist regions 13, 14 mounted on the skin facing surface side of the elastic waist sheet 11.

The elastic waist panel 11 has an elastic band function, and includes a front waist panel 16 forming a front waist region 13 and a rear waist panel 17 forming a rear waist region 14. The front and back waist panels 16, 17 have: with the inner edge A rectangular shape defined by 16a, 17a, outer end edges 16b, 17b, and both side edges 16c, 17c. The side edges 16c of the front waist panel 16 and the side edges 17c of the back waist panel 17 facing each other are superimposed on each other, and the side seams 18 arranged at intervals in the longitudinal direction Y are by well-known means such as hot pressing Various heat welding means such as flower processing and ultrasonic are connected to form a waist opening 19 and a pair of leg openings 20. The front and rear waist sheets 16 and 17 respectively include an inner sheet 21 located on the skin-facing surface side and an outer sheet 23 located on the non-skin-facing surface side.

The absorbent base 12 includes: front and rear end portions 12A, 12B attached to the skin-facing surfaces of the front and rear waist panels 16, 17, a liquid-absorbent core 43 extending in the longitudinal direction Y at least in the crotch region 15, and a liquid-absorbent core 43 The top sheet 44 formed of the hydrophilic fiber non-woven fabric on the opposite side of the skin, the back sheet 45 formed of the hydrophobic or poorly liquid-permeable fiber non-woven fabric on the non-skin facing side of the liquid-absorbent core 43, arranged in Between the liquid-absorbent core 43 and the back sheet 45, there is a leak-proof sheet 46 that covers at least the entire surface facing the back sheet 45 of the liquid-absorbent core 43. Various well-known fiber nonwoven fabrics such as SMS fiber nonwoven fabric or spunbonded nonwoven fabric can be used for the top sheet 44 and the back sheet 45.

The liquid-absorbent core 43 is one in which a required amount of superabsorbent polymer particles and fluff pulp are mixed, and has a higher rigidity and semi-rigidity than the sheet member constituting the diaper 10. In addition, the liquid-absorbent core 43 has a narrow sheet form in the center portion of the longitudinal direction Y, and the entire system is covered with a liquid diffusing sheet 47 such as tissue. The top sheet 44 and the back sheet 45 extend from the peripheral edge of the liquid-absorbent core 43 toward the outside, and the extension portions overlap each other. Together and joined by a hot melt adhesive (not shown) to form: side flaps 48 extending from both side edges 43C of the liquid-absorbent core 43 to the outside in the lateral direction X, and from both ends of the liquid-absorbent core An end flap 49 whose edge extends outward in the longitudinal direction Y.

Among the plurality of waist elastic bodies 27, in FIG. 20, the fineness of the upper waist elastic body 27A arranged above is larger than the fineness of the lower waist elastic body 27B arranged below, for example, the elongation ratio of the upper waist elastic body 27A and the lower waist Since the stretch magnification of the elastic body 27B is the same, the stretch force (contraction force) of the upper stretchable region 28A where the upper waist elastic body 27A is arranged is greater than the stretch force of the lower stretchable region 28B disposed on the lower waist elastic body 27B.

The lower waist elastic body 27B has a non-coated area where the adhesive is not applied at the center in the horizontal direction X, and is cut and shrunk in the horizontal center of the non-coated area, and the lower waist elastic body 27B is not present.的non-shrinking area 36.

Fig. 21 is an enlarged view of a part of Fig. 20. The cut portion 104a is not formed on the inner side of the lateral direction X of the ten lower waist elastic bodies 27B, and on the other hand, the cut portion 104a is formed on the outer side of the lateral direction X. The portion of the lower waist elastic body 27B where the cut portion 104a is formed forms the first stretchable area 29B, and the portion where the cut portion 104a is not formed is a second stretchable area 29C having a greater stretch force than the first stretchable area 29B.

As described above, by forming the front and rear waist regions 13, 14, the size of the stretch force of each elastic region becomes the upper stretch region 28A>the second stretch Contraction area 29C> first expansion and contraction area 29B.

Unless otherwise specified, the constituent materials constituting the manufacturing apparatus 100 of the present invention can use various well-known materials generally used in this field without limitation. In addition, the terms "1st" to "3rd" used in this manual are only used to distinguish the same elements, positions, etc.

100‧‧‧Manufacturing equipment

101‧‧‧First slice

102‧‧‧Second sheet

103‧‧‧Continuous elastomer

106‧‧‧Composite sheet

110‧‧‧Transportation Department

111‧‧‧Transport roller

120‧‧‧Continuous elastomer fixing part (a step)

121‧‧‧The first roll

122‧‧‧The second roll

130‧‧‧Cut off (step b)

131‧‧‧Tools

132‧‧‧Cutting roller

133‧‧‧The third roll

134‧‧‧The 4th roll

135‧‧‧Endless Belt

136‧‧‧Pushing part

140‧‧‧Joint (step c)

141‧‧‧roller

MD‧‧‧machine direction

Z‧‧‧Thickness direction

Claims (7)

A method of manufacturing a composite sheet, comprising: (a) fixing a continuous elastic body extending in the machine direction to a first sheet conveyed in the aforementioned machine direction; (b) fixing to one of the aforementioned first sheets The step of cutting a part of the continuous elastic body at intervals in the machine direction, and (c) in the state where the continuous elastic body is interposed between the first sheet and the second sheet, the first sheet and In the step of joining the second sheets to each other, in the step b, the size of the remaining portion of the continuous elastic body in the cut portion in the cross direction crossing the mechanical direction is smaller than that of the continuous elastic body without the cut portion. The size of the aforementioned cross direction. A method of manufacturing a composite sheet, comprising: (a) fixing a continuous elastic body extending in the machine direction to a first sheet conveyed in the aforementioned machine direction; (b) fixing to one of the aforementioned first sheets The step of cutting a part of the continuous elastic body at intervals in the machine direction, and (c) in the state where the continuous elastic body is interposed between the first sheet and the second sheet, the first sheet and In the step of joining the second sheets to each other, in the step b, a part of the continuous elastic body and the first sheet overlapping the continuous elastic body in the thickness direction are cut by a cutting tool And at least one of the second sheet and at least one of the first sheet and the second sheet that does not overlap the continuous elastic body in the thickness direction is cut, and the length of the cutting device in the cross direction is greater than that of the continuous elastic The size of the body in the aforementioned cross direction is larger. The method for manufacturing a composite sheet according to claim 1, wherein, in the step b, a part of the continuous elastic body and the first and second sheets overlapping the continuous elastic body in the thickness direction are cut by a cutting tool At least one of the cutting tools is cut, and the length dimension of the cutting tool in the crossing direction is smaller than the dimension of the continuous elastic body in the crossing direction. The method for producing a composite sheet according to claim 2 or 3, wherein after applying an adhesive on the peripheral surface of the continuous elastomer, in the step c, the continuous elastomer is fixed to the first by the adhesive respectively In the first sheet and the second sheet, in the step b after the step c, a part of the continuous elastic body is cut by the cutting tool. The method for manufacturing a composite sheet according to claim 3, wherein, in the step b, a part of the continuous elastic body is cut by the cutting tool on the inner side than the both side edges of the continuous elastic body in the cross direction Off. The method for manufacturing a composite sheet according to claim 2 or 3 or 5, wherein the cutting tool is fixed to the base part in a manner inclined to the machine direction. Such as the method of manufacturing a composite sheet of claim 4, wherein the step b after the step a and the step c is The first sheet and the second sheet form the cut portion, (d) after the step b, a step of fixing and laminating a waterproof third sheet on at least one of the first sheet and the second sheet.

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