JPWO2018154803A1 - Method and apparatus for manufacturing composite elastic member having tunnel space, and composite elastic member having tunnel space - Google Patents

Abstract

The invention of the present application is to reduce the amount of hot melt adhesive used for joining in joining two sheets (the non-stretchable sheet of the first base material and the stretchable sheet of the second base material), elasticity The object is to reduce the product cost by eliminating the need for a member (thread rubber). The task is to improve the function of tunnel space (Bleet).
The thin film hot melt adhesive is applied to the back surface of the non-stretchable sheet of the first base material in a pattern distribution by the convex surface of the pattern roll. A transfer step, a first base material coated with a thin film hot melt adhesive on the back surface in the step, and a stretchable sheet of a second base material fed at a traveling speed of 1/2 or less with respect to the first base material. Including the pasting process, where the stretch nonwoven fabric sheet has a natural length, the distribution of adhesion positions and the cross-sectional shape of the tunnel space are set in the pattern distribution by the convex surface of the pattern roll. A method for producing a composite stretchable member.

Description

The present invention provides a composite stretchable member composed of a first base non-stretchable sheet and a second base stretchable sheet for forming a tunnel space formed between the two sheets. The present invention relates to a method for manufacturing a composite elastic member, a manufacturing apparatus, and a composite elastic member.
In addition, a nonwoven fabric, paper, etc. are applied as a 1st base material and a 2nd base material.

In an absorbent article such as a disposable diaper or a sanitary napkin, as an example of use of a composite stretchable member that can form a tunnel space (breath (襞)), an elastic member is joined to a sheet material in an expanded state, and the elastic member is Shrinking to form a gather (a stretchable part having a large number of wrinkles) on the sheet material is widely performed.
As a composite stretchable member of this type, an elastic member having a longitudinal direction of the member as a stretchable direction and a linear joint portion located in a direction orthogonal to the stretchable direction of the elastic member are interposed between a plurality of sheet layers. A disposable diaper having an elastic stretchable part is known.

Published utility model publication: Japanese Utility Model Publication No. 4-71922 Japanese Patent No. 5928469

Problems to be solved by the invention

Patent Document 1 (name of device: gatherer of disposable articles) is a composite elastic member having two sheet materials and a plurality of elastic members arranged between these two sheet materials, The sheet material is partially joined to form a plurality of joints, and a plurality of joint lines extending in a direction intersecting the expansion and contraction direction of the elastic member are formed by the plurality of joints, Each elastic member R is fixed between the two sheet materials in at least a part of the joining portions, and each of the two sheet materials forms a gatherer (襞) T ′ between the adjacent joining lines. A composite elastic member is disclosed (see FIG. 10).
Further, since there are a plurality of elastic members (thread rubber) arranged between the two sheet materials, two sheets with a plurality of elastic members (thread rubber) interposed at the position of the joining line. The sheet material is fixed.
Therefore, there is a problem that requires a plurality of elastic members (thread rubber).

  Patent Document 2 (Hot-Melt Adhesive Roll Transfer Application Method and Application Device) is a prior invention by the inventor of the present invention, and the patentee is the applicant of the present application. In the hot melt adhesive roll transfer coating method, the method further comprises a step of transferring the hot melt adhesive applied to the surface from the convex surface 12 of the pattern roll to the surface of the coated substrate. By providing a coater head with a direction facing the pattern surface of the pattern roll and supplying hot melt adhesive HM supplied from the hot melt adhesive supply device to the pattern surface of the pattern roll 10 in a thin film state, A hot melt adhesive flow, characterized in that a thin film hot melt adhesive is supplied only to the convex surface 12 of the pattern roll. It discloses a transfer coating method.

The present invention applies the above-mentioned invention in joining two sheets (a non-stretchable sheet of the first base material and a stretchable sheet of the second base material), and applies a thin film hot melt to a predetermined portion of the base material sheet. By reducing the amount of hot-melt adhesive used for bonding by applying an adhesive pattern, and reducing the product cost by eliminating the need for multiple elastic members (thread rubber) in Patent Document 1. The task is to measure.
Further, it is an object to enhance the function as a tunnel space (breath (襞)).

Solution to the problem

The invention of claim 1 of the present application is that a thin film hot melt adhesive is applied to the back surface of the non-stretchable sheet of the first substrate in a pattern distribution by the convex surface of the pattern roll. A transfer process;
The first base material coated with a thin film hot melt adhesive on the back surface by the above process and the stretchable sheet of the second base material fed at a traveling speed of 1/2 or less with respect to the first base material Including the bonding process,
A method for producing a composite stretchable member, characterized in that the distribution of adhesion positions and the cross-sectional shape of the tunnel space are set in the pattern distribution by the convex surface of the pattern roll by setting the stretchable nonwoven fabric sheet to a natural length. provide.
In the invention of claim 2 of the present application, the thin film hot melt adhesive is applied to the back surface of the non-stretchable sheet of the first base material in a pattern distribution by the convex surface of the pattern roll. A transfer step, a first base material coated with a thin film hot melt adhesive on the back surface in the step, and a stretchable sheet of a second base material fed at a traveling speed of 1/2 or less with respect to the first base material. Including the pasting process of pasting,
In the transfer process, the pattern distribution on the surface of the convex portion of the pattern roll is a narrow straight line in the direction orthogonal to the traveling direction of the first base material, and the joining and fixing portion between the first base material and the second base material is a coated base material. Interspersed with narrow straight lines in the direction perpendicular to the longitudinal direction,
Provided is a method for producing a composite elastic member having a tunnel space, characterized in that the tunnel space formed by making the elastic nonwoven fabric sheet natural length is intermittently present in the direction orthogonal to the traveling direction of the coated substrate. To do.
In the invention of claim 3 of the present application, the thin film hot melt adhesive is applied to the back surface of the non-stretchable sheet of the first base material in a pattern distribution by the convex surface of the pattern roll. A transfer process;
The first base material coated with a thin film hot melt adhesive on the back surface by the above process and the stretchable sheet of the second base material fed at a traveling speed of 1/2 or less with respect to the first base material Including the bonding process,
In the transfer process, the pattern distribution on the convex roll surface of the pattern roll is a narrow straight line in the direction orthogonal to the traveling direction of the first base material, and the joint between the first base material and the second base material is the coated base material length. It is divided into a plurality of sections that are intermittently present in the narrow straight line in the direction perpendicular to the direction and the interval of the narrow straight line is different,
The tunnel space formed by making the elastic nonwoven fabric sheet natural length is intermittently present in the direction orthogonal to the traveling direction of the coating base material, and is divided into a plurality of coating sections having different cross-sectional shapes of the tunnel space. A method for manufacturing a composite elastic member having a tunnel space is provided.
The invention of claim 4 of the present application is a supply device for a non-stretchable sheet of a first substrate, a transfer device for transferring and applying a thin film hot melt adhesive to the first substrate, and a supply of a stretchable sheet of a second substrate. An apparatus, and a bonding apparatus for bonding the first base material and the second base material,
The rotational speed of the driving roller of the second base material supply device is set to half or less of the rotational speed of the driving roller of the first base material supply device. Provided is a stretchable member manufacturing apparatus characterized by being a narrow straight line in a direction orthogonal to a rotation direction.
The invention of claim 5 of the present application is a supply device for a non-stretchable sheet of a first substrate, a transfer device for transferring and applying a thin film hot melt adhesive to the first substrate, and a supply of a stretchable sheet of a second substrate. An apparatus, and a bonding apparatus for bonding the first base material and the second base material,
The rotational speed of the driving roller of the second base material supply device is set to half or less of the rotational speed of the driving roller of the first base material supply device. Manufacture of a composite stretchable member having a tunnel space, characterized in that it is a narrow straight line perpendicular to the rotational direction and is divided into a plurality of sections in the roll rotational direction with different intervals between the narrow straight lines. Providing equipment.
In the invention of claim 6 of the present application, the pattern distribution by the convex surface of the pattern roll of the transfer device is a narrow straight line in the direction orthogonal to the roll rotation direction, and the mutual interval (pitch of the narrow straight line) between the narrow straight lines is The apparatus for producing a composite elastic member having a tunnel space according to claim 5, wherein there are a plurality of different sections.
The invention according to claim 7 is configured by laminating the non-stretchable sheet of the first base material and the stretchability of the second base material via a joint fixing portion using a thin film hot melt adhesive, A composite stretchable member having a tunnel space is provided, wherein a tunnel space is formed between the non-stretchable sheet and the stretchable sheet of the second base material between the fixed areas.
The invention according to claim 7 of the present application is configured by laminating a non-stretchable nonwoven sheet and a stretchable nonwoven sheet through a fixed area using a thin film hot melt adhesive, and the non-stretchable nonwoven sheet and the stretchable nonwoven sheet A tunnel space is formed between the fixed areas, and the fixed areas are narrow straight lines perpendicular to the longitudinal direction of the composite elastic member and intermittently exist in the longitudinal direction of the composite elastic member. Provided is a composite elastic member.
[Effect of the invention]

The present invention provides an elastic member by fixing a non-stretchable sheet of a first base material and a stretchable sheet of a second base material with a thin film hot melt adhesive in a pattern distribution by a convex surface of a pattern roll. This eliminates the need for (yarn rubber), reduces the manufacturing cost, and has the effect of providing a composite stretchable member in which a tunnel space [bleat (襞)] is formed that is flexible, feels good and feels good.
Furthermore, it has the effect of providing a composite stretchable member having a tunnel space with good bondability between the composite stretchable member and the sheet-like member to be laminated.

The schematic of the manufacturing apparatus of the composite elastic | stretch member which has a tunnel space which shows this invention 1st Example. The development view of the convex part surface of a pattern roll. FIG. 4 is an explanatory view of a coating area, in which FIG. A is a plan view, FIG. B is a side view, and FIG. It is explanatory drawing of an adhesion fixing area, a figure is a top view, b figure is a side view, c figure is an expanded sectional view of a fixing area. Explanatory drawing explanatory drawing of tunnel space, a figure is sectional drawing, b figure is a perspective view. The expanded view which shows another Example about the pattern distribution of the convex part surface of a pattern roll. The plane schematic of the manufacturing apparatus of the composite elastic member which has tunnel space which shows this invention 2nd Example. The development which shows other Example about the pattern distribution of the convex part surface of a pattern roll. 8A and 8B are explanatory views of the distribution and shape of the tunnel space in the embodiment of the pattern distribution shown in FIG. 8. FIG. A is a plan view, FIG. B is a longitudinal sectional view at the center of the plan view, and FIG. Figure. The perspective view of the composite elastic member of patent document 1. FIG. In patent document 2, it is explanatory drawing explanatory drawing which shows supplying a hot melt adhesive of a thin film only to the convex part surface of a pattern roll, a figure is sectional drawing, b figure is a top view

I
In the transfer step, a thin film hot melt adhesive is applied to the back surface of the non-stretchable sheet (nonwoven fabric) of the first base material in a pattern distribution by the convex surface of the pattern roll.
II
In the next bonding step, the non-stretchable sheet (nonwoven fabric) of the first base material coated with a thin film hot melt adhesive on the back surface by the above step,
Passing between the deceleration drive rolls, the stretchable sheet (nonwoven fabric) of the second base material is between the rolling rolls at a traveling speed of 1/2 or less with respect to the non-stretchable sheet (nonwoven fabric) of the first base material. The non-stretchable sheet (nonwoven fabric), which is the first base material, and the stretchable sheet (nonwoven fabric) of the second base material are bonded together by passing.
III
It progresses by a pasting process, and the elastic sheet (nonwoven fabric) of the second substrate becomes a natural length, so that the lower surface of the non-elastic sheet (nonwoven fabric) of the first substrate and the elastic sheet of the second substrate ( Between the upper surface of the non-woven fabric), a fixed area is formed by a hot melt adhesive having a pattern distribution by the convex surface of the pattern roll.
IV
Further, a tunnel space is formed between the fixed areas.
V
About the pattern distribution by the convex part surface of a pattern roll in the said transfer process I, it is set as the shape which exists intermittently by the narrow-width straight line of a member longitudinal direction and a perpendicular direction.

The multilayer stretchable member manufacturing apparatus having the tunnel space of the present invention shown in FIGS. 1 to 5 will be described.
First, referring to FIG. 1, a non-stretchable sheet supply device 1 for a first base material, a transfer device 2 for transferring and applying a thin film hot melt adhesive to the first base material A, and expansion and contraction of a second base material. The sheet-reducing device 3 and the bonding device 4 for bonding the first base material A and the second base material B are used.

The supply device 1 for the non-stretchable sheet of the first substrate is composed of a pair of upper and lower drive rolls 5, 5. The transfer device 2 includes a pattern roll 10 and a rolling roll 6.
The deceleration supply device 3 for the stretchable sheet B of the second substrate is composed of deceleration drive rolls 7 and 7 and a tension roll 8.
The laminating apparatus 4 for the first base material and the second base material is constituted by rolling rolls 9 and 9.
The pair of upper and lower drive rolls 5 and 5 of the non-stretchable sheet supply device 1 of the first base material and the rolling rolls 9 and 9 of the laminating device 4 are operated in synchronism via a servo mechanism to rotate substantially the same. Drive by number.
The pattern roll 10 and the rolling roll 6 of the transfer device 2 are free rolls, and correspond to the transfer speed of the first base material A, so that they are the same speed as the rolling rolls 9 and 9 of the laminating apparatus 4.

The drive rotation speed of the deceleration drive rolls 7 and 7 of the deceleration supply apparatus 3 is set to ½ or less of the rotation speed of the rolling rolls 9 and 9 of the laminating apparatus 4. That is, the transfer speed of the second base material B is set to ½ or less of the transfer speed of the first base material A.

Regarding the pattern roll 10 of the transfer device 2, a convex surface 12 and a concave surface 13 are formed on the roll surface.
The thin film hot melt adhesive HM supplied from the application head 11 of the hot melt adhesive supply device is applied to the convex surface 12 of the pattern surface.
The pattern distribution by the convex surface 12 of the pattern roll of the transfer device is a narrow straight line in the direction orthogonal to the roll rotation direction.

  FIG. 2 is a developed view of the roll surface showing an example of the pattern distribution. FIG. 2a shows the width d of the convex surface 12 being 0.3 mm and the pitch p is 4 mm, and FIG. The width d is 0.3 mm, the pitch p is 7 mm, and the width c of the convex surface 12 is 0.3 mm to 0.5 mm and the pitch p is 10 mm in FIG.

Next, an example of conditions for each part of the coating operation is shown.
Pitch p: 0.2 mm to 0.5 mm
Coating surface thickness: 5μ to 30μ
Transfer speed of base material A: 400 m / min
Temperature of hot melt supply path of hot melt adhesive supply device: 160 ° C
Pattern roll temperature: 130 ° C to 65 ° C
It should be noted that the above shows an example of the coating conditions and does not indicate the limiting conditions.

Next, formation of the tunnel space according to the present invention will be described.
FIG. 3 shows a coating state of the thin film hot melt adhesive HM between the transfer step E1 and the bonding step E2.
The thin film hot melt adhesive HM is applied to the lower surface of the first base A in the area Q in the development pattern shown in FIG.
FIG. 4 shows a coating state of the thin film hot melt adhesive HM immediately after the bonding step E2.
By passing between the rolling rolls, the coating range of the thin film hot melt adhesive HM is expanded around the coating area Q and becomes the range of the fixed area QQ. Therefore, the joining and fixing range between the first base material A and the second base material B, that is, the fixing area QQ is completed.

Referring to FIG. 5, when the stretchable sheet (non-woven fabric) of the second base material changes to a natural length, a tunnel space T is formed between the fixed areas QQ.
The tunnel space T is intermittently present in the direction orthogonal to the traveling direction of the coated substrate.

  FIG. 6 shows an example in which the pattern distribution of the pattern roll 1 is divided into a plurality of sections in which the intervals of the narrow straight lines on the convex surface 12 are different in the direction orthogonal to the roll rotation direction (vertical direction in the pattern development view). An example is shown. In FIG. 7, 10A, 10B, and 10C are coating heads, 13A, 13B, and 13C are hot-melt supply devices, and 14 is a hot-melt tank.

  FIG. 7 shows an embodiment in which a plurality (6A, 6B, 6C) of hot-melt adhesive supply devices 10 and pattern rolls 6 are provided, and the widths of the narrow straight lines are different for each pattern roll 10.

  FIG. 8 shows a pattern distribution of the pattern roll 1 in addition to a large number of narrow straight lines 12A formed in an inclined direction in addition to a large number of narrow straight lines 12A formed in a direction orthogonal to the roll rotation direction (vertical direction in the pattern development view). , 12B ′.

FIG. 9 shows that the base material A on which the coating area Q composed of the thin film hot melt adhesive HM applied with the pattern distribution cloth of FIG. FIG. 9 shows the distribution of the tunnel space T based on the approach of the fixed area QQ. In FIG. 9, the tunnel spaces include T1, T2, T3, and T3 ′.
With respect to the fixed area QQ formed by a large number of narrow straight lines formed in the tilt direction, the change component in the direction perpendicular to the tilt direction acts on the change in the natural length of the base material B.

  The distribution and shape of the tunnel space T changes depending on the position of the base material, so that a sheet-like member (for example, a body fluid absorption mat, a therapeutic drug solution) that is laminated on an intermediate product of a composite stretchable member that forms a tunnel space [breath (襞)] It has the effect of improving the bonding with the application sheet)).

  The present invention reduces the manufacturing cost of a composite stretchable member in which a tunnel space [Bleet (襞)] is formed, and provides a composite stretchable member that is flexible, feels good, and has a good touch. However, it contributes to the development of the manufacturing industry for body fluid absorbing products such as disposable diapers.

A first base material B second base material HM thin film hot melt adhesive Q coating area QQ fixed area T tunnel space 1 non-stretch sheet supply device 2 transfer device,
DESCRIPTION OF SYMBOLS 3 Deceleration supply apparatus 4 of an elastic sheet 4 Bonding apparatus 5 Drive roll 6 Roll roll 7 Deceleration drive roll 8 Tension roll 9 Roll roll 10 Pattern roll 12 Convex surface

The invention of claim 1 of the present application is that a thin film hot melt adhesive is applied to the back surface of the non-stretchable sheet of the first substrate in a pattern distribution by the convex surface of the pattern roll. A transfer process;
The first base material coated with a thin film hot melt adhesive on the back surface by the above process and the second base material stretchable sheet fed to the first base material at a traveling speed of 1/2 or less. Including the bonding process,
A method for producing a composite stretchable member, characterized in that the distribution of adhesion positions and the cross-sectional shape of the tunnel space are set in the pattern distribution by the convex surface of the pattern roll by setting the stretchable nonwoven fabric sheet to a natural length. provide.
In the invention of claim 2 of the present application, a thin film hot melt adhesive is applied to the back surface of the non-stretchable sheet of the first base material in a pattern distribution by the convex surface of the pattern roll. A transfer process;
The first base material coated with a thin film hot melt adhesive on the back surface by the above process and the second base material stretchable sheet fed to the first base material at a traveling speed of 1/2 or less. Including the bonding process,
In the transfer process, the pattern distribution by the convex surface of the pattern roll is a narrow straight line in the direction orthogonal to the traveling direction of the first base material, and the joint between the first base material and the second base material is the coated base material length It is divided into a plurality of sections that are intermittently present in the narrow straight line in the direction perpendicular to the direction and the interval of the narrow straight line is different,
The tunnel space formed by making the elastic nonwoven fabric sheet natural length is intermittently present in the direction orthogonal to the traveling direction of the coating base material, and is divided into a plurality of coating sections having different cross-sectional shapes of the tunnel space. A method for manufacturing a composite elastic member having a tunnel space is provided.
The invention of claim 3 of the present application includes a supply device for a non-stretchable sheet of a first substrate, a transfer device for transferring and applying a thin film hot melt adhesive to the first substrate, and a supply of a stretchable sheet of a second substrate. An apparatus, and a bonding apparatus for bonding the first base material and the second base material,
The rotation speed of the driving roller of the second base material supply device is set to half or less of the rotational speed of the driving roller of the first base material supply device, and the pattern distribution by the convex surface of the pattern roll of the transfer device is the roll Manufacture of a composite stretchable member having a tunnel space, characterized in that it is a narrow straight line perpendicular to the rotational direction and is divided into a plurality of sections in the roll rotational direction with different intervals between the narrow straight lines. Providing equipment.
According to the invention of claim 4 of the present application, the pattern distribution by the convex surface of the pattern roll of the transfer device is a narrow straight line in the direction orthogonal to the roll rotation direction, and the mutual interval between the narrow straight lines (the pitch of the narrow straight line) is 6. The apparatus for producing a composite elastic member having a tunnel space according to claim 5, wherein there are a plurality of different sections.
The invention of claim 5 of the present application is configured by laminating the non-stretchable sheet of the first base material and the stretchability of the second base material through a joint fixing part using a thin film hot melt adhesive, A composite stretchable member having a tunnel space is provided, wherein a tunnel space is formed between the non-stretchable sheet and the stretchable sheet of the second base material between the fixed areas.

The invention of claim 1 of the present application
A thin film hot melt adhesive is applied to the back surface of the non-stretchable sheet of the first substrate in a pattern distribution by the convex surface of the pattern roll. A transfer process;
The first base material coated with a thin film hot melt adhesive on the back surface by the above process and the second base material stretchable sheet fed to the first base material at a traveling speed of 1/2 or less. Including the bonding process,
In the transfer process, the pattern distribution by the convex surface of the pattern roll is a narrow straight line in the direction orthogonal to the traveling direction of the first base material, and the joint between the first base material and the second base material is the coated base material length It is divided into a plurality of sections that are intermittently present in the narrow straight line in the direction perpendicular to the direction and the interval of the narrow straight line is different,
Tunnel space formed by the stretchable nonwoven fabric sheet and the natural length is intermittently present in the direction perpendicular to the traveling direction of the coated substrate, and Ru is divided into a plurality applying sections having different cross-sectional shape of the tunnel space A method for manufacturing a composite elastic member having a tunnel space is provided.
The invention of claim 2 of the present application
A supply device for a non-stretchable sheet of a first substrate;
A transfer device for transferring and applying a thin film hot melt adhesive to the first substrate;
A supply device for the elastic sheet of the second substrate;
A bonding apparatus for bonding the first base material and the second base material,
The rotational speed of the driving roller of the second base material supply device is set to one half or less of the rotational speed of the driving roller of the first base material supply device,
The pattern distribution on the surface of the convex portion of the pattern roll of the transfer device is divided into a plurality of sections that are narrow straight lines perpendicular to the roll rotation direction and that have different mutual intervals in the roll rotation direction. An apparatus for manufacturing a composite elastic member having a tunnel space is provided.
The invention of claim 4 of the present application
The non-stretchable sheet of the first base material and the stretchability of the second base material are configured by laminating via a joint fixing part with a thin film hot melt adhesive,
Having a fixing area that is a joint fixing range formed by enlarging the periphery of the application area that is the application range of the hot melt adhesive;
Characterized <br/> said fixed Elijah therebetween tunnel space formed between the elastic sheet of the second base material in which the the non-stretchable sheet before Symbol first substrate is present A composite elastic member having a tunnel space is provided.

Claims (8)

The thin film hot melt adhesive is applied to the back surface of the non-stretchable sheet of the first base material in a pattern distribution by the convex surface of the pattern roll. A transfer process;
The first base material coated with a thin film hot melt adhesive on the back surface by the above process and the stretchable sheet of the second base material fed at a traveling speed of 1/2 or less with respect to the first base material Including the bonding process,
A method for producing a composite stretchable member, characterized in that the distribution of adhesion positions and the cross-sectional shape of the tunnel space are set by the pattern distribution on the surface of the convex portion of the pattern roll by setting the stretchable nonwoven fabric sheet to a natural length. The thin film hot melt adhesive is applied to the back surface of the non-stretchable sheet of the first base material in a pattern distribution by the convex surface of the pattern roll. A transfer process;
The first base material coated with a thin film hot melt adhesive on the back surface by the above process and the stretchable sheet of the second base material fed at a traveling speed of 1/2 or less with respect to the first base material Including the bonding process,
In the transfer process, the pattern distribution on the surface of the convex portion of the pattern roll is a narrow straight line in the direction orthogonal to the traveling direction of the first base material, and the joining and fixing portion between the first base material and the second base material is a coated base material. Interspersed with narrow straight lines in the direction perpendicular to the longitudinal direction,
A method for producing a composite elastic member having a tunnel space, characterized in that the tunnel space formed by making the elastic nonwoven fabric sheet have a natural length is intermittently present in a direction orthogonal to the traveling direction of the coated substrate. The thin film hot melt adhesive is applied to the back surface of the non-stretchable sheet of the first base material in a pattern distribution by the convex surface of the pattern roll. A transfer process;
The first base material coated with a thin film hot melt adhesive on the back surface by the above process and the stretchable sheet of the second base material fed at a traveling speed of 1/2 or less with respect to the first base material Including the bonding process,
In the transfer process, the pattern distribution on the convex roll surface of the pattern roll is a narrow straight line in the direction orthogonal to the traveling direction of the first base material, and the joint between the first base material and the second base material is the coated base material length. It is divided into a plurality of sections that are intermittently present in the narrow straight line in the direction perpendicular to the direction and the interval of the narrow straight line is different,
The tunnel space formed by making the elastic nonwoven fabric sheet natural length is intermittently present in the direction orthogonal to the traveling direction of the coating base material, and is divided into a plurality of coating sections having different cross-sectional shapes of the tunnel space. A method for producing a composite stretchable member having a tunnel space. A supply device for the non-stretchable sheet of the first substrate;
A transfer device for transferring and applying a thin film hot melt adhesive to the first substrate;
An apparatus for supplying an elastic sheet of the second substrate;
A bonding apparatus for bonding the first base material and the second base material,
The rotational speed of the driving roller of the second base material supply device is set to a half or less of the rotational speed of the driving roller of the first base material supply device,
The apparatus for producing an elastic member, wherein the pattern distribution by the convex part surface of the pattern roll of the transfer device is a narrow straight line perpendicular to the roll rotation direction A supply device for the non-stretchable sheet of the first substrate;
A transfer device for transferring and applying a thin film hot melt adhesive to the first substrate;
An apparatus for supplying an elastic sheet of the second substrate;
A bonding apparatus for bonding the first base material and the second base material,
The rotational speed of the driving roller of the second base material supply device is set to a half or less of the rotational speed of the driving roller of the first base material supply device,
The pattern distribution on the surface of the convex portion of the pattern roll of the transfer device is divided into a plurality of sections that are narrow straight lines perpendicular to the roll rotation direction and that have different mutual intervals in the roll rotation direction. The manufacturing apparatus of the composite elastic member which has a tunnel space characterized by the above-mentioned.   The pattern distribution on the surface of the convex portion of the pattern roll of the transfer device is a narrow straight line in the direction orthogonal to the roll rotation direction, and there are a plurality of sections in which the mutual intervals (the pitch of the narrow straight line) of the narrow straight lines are different. The apparatus for producing a composite elastic member having a tunnel space according to claim 5.   The non-stretchable sheet of the first base material and the stretchability of the second base material are laminated via a joining and fixing part using a thin film hot melt adhesive, and the non-stretchable sheet of the first base material and the second base material A composite elastic member having a tunnel space, characterized in that a tunnel space is formed between the fixed areas between the elastic sheet of the base material A non-stretchable non-woven fabric sheet and a stretchable non-woven fabric sheet are laminated via a fixed area using a thin film hot melt adhesive. Between the non-stretchable non-woven fabric sheet and the stretchable non-woven fabric sheet, A tunnel space is formed,
The composite elastic member having a tunnel space, wherein the fixed area is a narrow straight line perpendicular to the longitudinal direction of the composite elastic member and intermittently exists in the longitudinal direction of the composite elastic member.

Images