JPH11165388A - Manufacture of spun bond nonwoven fabric laminated sheet - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a spun bond nonwoven fabric laminated sheet having a smooth surface and no unevenness of an interlayer release strength, and further a spun bond nonwoven fabric laminated sheet having a smooth surface, no unevenness of an interlayer release strength, and further high bulkiness. SOLUTION: The method for manufacturing a spun bond nonwoven fabric laminated sheet comprises the steps of superposing a spun bond nonwoven fabric (a) prepared by core spun composite fibers constituted by a sheath made of a polyolefin (i) and a core made of a polyolefin (ii) having a higher melting point than that of the polyolefin (i) of the sheath or side-by-side composite fibers constituted by a polyolefin (i) and a polyolefin (ii) with a gas permeable polyolefin film (b), passing a surface of the film between a smooth surface metal roll having a surface temperature of a range from (a melting point of the film (b) -5 deg.C) to (the melting point +5 deg.C) and a smooth surface soft roll having a surface temperature of 100 deg.C or lower so as to be moved to a metal roll side (b) and thermally press bonding it.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for producing a spunbonded nonwoven laminated sheet, and more particularly to a spunbonded nonwoven laminated sheet suitable for applications such as a back sheet of a breathable paper diaper and a sanitary napkin. It relates to a manufacturing method.

[0002]

BACKGROUND OF THE INVENTION Spunbonded nonwoven fabrics are produced by making a web simultaneously with melt spinning without using off-the-shelf fibers and needle punching or fusing the web. At this time, the spun fibers are drawn and stretched using an air stream, a water stream, or a centrifugal force, and the drawn fibers are received by a conveyor or the like to form a sheet-like web. Such spunbonded nonwoven fabric has high productivity,
Moreover, because of its large mechanical strength and soft texture, nonwoven fabrics of polyolefin nonwoven fabrics, such as polypropylene fibers, manufactured by the spunbond method have come to be used for applications such as disposable diaper backsheets and sanitary napkin backsheets. I have.

[0003] When a spunbond polypropylene nonwoven fabric is used for a backsheet of a disposable diaper and a sanitary napkin, the spunbond polypropylene nonwoven fabric is bonded to a breathable polyethylene film.

[0004] As a bonding method, a general method is to bond a spunbond polypropylene nonwoven fabric and a breathable polyethylene film with a pair of hot metal flat rolls using a hot melt type adhesive as an adhesive medium. . However, since the laminated sheet obtained by this method is manufactured using a pair of metal flat rolls, there is a problem that the feel of the nonwoven fabric is reduced and the flexibility is lost. There is a problem that it oozes out and adheres to the metal roll. In addition, this method requires an operation of applying and controlling the hot melt adhesive on the surface of the breathable polyethylene film.

[0005] As a bonding method other than the above, there is a method using a hot embossing roll. However, in this method, when the production rate of the laminated sheet is increased, the amount of heat transmitted from the hot embossing roll to the breathable polyethylene film and the spunbond polypropylene nonwoven fabric is insufficient, so that the delamination strength of the laminated sheet is reduced. As a countermeasure for this, it is necessary to devise a preheating step for the breathable polyethylene film and / or the spunbond polypropylene nonwoven fabric, a nip (roll gap), and the like. However, even if such measures are taken, the obtained laminated sheet has a boundary line between the bonded portion and the non-bonded portion between the embossed portion and the non-embossed portion,
There remains a problem that the delamination strength varies.

The inventors of the present application have made intensive studies to solve the above-mentioned problems, and have found that a sheath made of polyolefin (i) and a core made of polyolefin (ii) having a higher melting point than polyolefin (i) in the sheath. Core-in-sheath type conjugate fiber composed of a non-woven fabric, or a spunbond nonwoven fabric (a) prepared from a side-by-side type conjugate fiber composed of the polyolefin (i) and the polyolefin (ii), and a breathable polyolefin film (b) And the surface temperature is the melting point of the breathable polyolefin film (b) −
The surface of the air-permeable polyolefin film (b) is located between the metal roll having a smooth surface having a temperature in the range of 5 ° C. to a melting point + 5 ° C. and the soft roll having a surface temperature of 100 ° C. or less. And thermocompression bonding, a spunbonded nonwoven fabric laminated sheet having a smooth surface and no variation in delamination strength can be obtained, and the present invention has been completed.

[0007]

SUMMARY OF THE INVENTION An object of the present invention is to solve the above-mentioned problems associated with the prior art, and to provide a spunbonded nonwoven laminated sheet having a smooth surface and no variation in delamination strength. The purpose is.

Another object of the present invention is to provide a bulky spunbonded nonwoven laminated sheet having a smooth surface and no variation in delamination strength.

[0009]

SUMMARY OF THE INVENTION A method for producing a spunbonded nonwoven laminated sheet according to the present invention comprises a sheath made of polyolefin (i) and a core made of polyolefin (ii) having a higher melting point than polyolefin (i) in the sheath. And a breathable polyolefin film (b) and a spunbond nonwoven fabric (a) prepared from a core-sheath type composite fiber to be prepared or a side-by-side type composite fiber composed of the polyolefin (i) and the polyolefin (ii). The surface temperature is the melting point of the breathable polyolefin film (b)-
The surface of the air-permeable polyolefin film (b) is located between the metal roll having a smooth surface having a temperature in the range of 5 ° C. to a melting point + 5 ° C. and the soft roll having a surface temperature of 100 ° C. or less. And then thermocompression-bonded.

In the present invention, the spunbonded nonwoven fabric (a) is prepared from a core-sheath type conjugate fiber comprising a sheath made of an ethylene polymer and a core made of a propylene polymer. It is preferable that the breathable polyolefin film (b) is a polyethylene film.

The soft roll is preferably a rubber roll. At the time of the thermocompression bonding, the nip pressure is 3 to 5 kg /
It is preferably adjusted to cm ² .

[0012]

DETAILED DESCRIPTION OF THE INVENTION Hereinafter, a method for producing a spunbonded nonwoven laminated sheet according to the present invention will be specifically described.

First, the spunbonded nonwoven fabric (a) and the breathable polyolefin film (b) used in the method for producing a spunbonded nonwoven laminate sheet according to the present invention will be described.

Spunbonded nonwoven fabric (a) The spunbonded nonwoven fabric (a) used in the present invention comprises a sheath made of polyolefin (i) and a core made of polyolefin (ii) having a higher melting point than polyolefin (i) in the sheath. It is prepared from a core-in-sheath type composite fiber composed of a polyolefin (i) and a side-by-side type composite fiber composed of the polyolefin (ii).

[Core-sheath type composite fiber] The polyolefin (i) forming the sheath portion is not particularly limited, but an ethylene polymer is preferably used.

As the ethylene polymer, a homopolymer of ethylene (the production method may be either a low pressure method or a high pressure method)
Alternatively, a random copolymer of ethylene and an α-olefin such as propylene, 1-butene, 1-hexene, 4-methyl-1-pentene and 1-octene may be mentioned.

These ethylene polymers have a density (ASTM
D 1505) is 0.880~0.970g / cm ^3, preferably it is desirable from the viewpoint of spinnability in the range of 0.900~0.950g / cm ^3, also the melt flow rate (MFR; ASTM D 1238 , 190 ℃, load 2.16kg) 20 ~
It is desirably in the range of 60 g / 10 min, preferably 25 to 50 g / 10 min from the viewpoint of spinnability.
Mn (Mw: weight average molecular weight, Mn: number average molecular weight) is preferably in the range of 2 to 4 from the viewpoint of spinnability. Density, MFR and Mw / M
An ethylene homopolymer in which n is within the above range is preferred in terms of flexibility and spinnability of the obtained nonwoven fabric. In addition, Mw /
Mn was determined by gel permeation chromatography (G
PC) by a conventionally known method.

The polyolefin (ii) forming the core is not particularly limited, but a polyolefin having a higher melting point than the polyolefin (i) forming the sheath is used. The difference between the melting point of the polyolefin (ii) forming the core and the melting point of the polyolefin (i) forming the sheath is 10
It is desirable that the temperature is not less than ° C.

As the polyolefin (ii) forming the core, a propylene polymer is preferably used. As the propylene-based polymer, propylene homopolymer or propylene, ethylene, 1-butene, 1-hexene, 4-
Examples include random copolymers with α-olefins such as methyl-1-pentene and 1-octene.

These propylene / α-olefin random copolymers have an α-olefin component content of 0.5 to 5%.
It is desirably in the range of mol%. These propylene-based polymers have a melt flow rate (MFR; ASTM D
1238, 230 ° C, load 2.16kg) 20-70g / 10min,
Preferably, it is in the range of 30 to 60 g / 10 minutes from the viewpoint of spinnability, and Mw / Mn is preferably in the range of 2 to 4 from the viewpoint of spinnability.

The weight ratio ((ii) / (i)) of the polyolefin (ii) forming the core of the composite fiber to the polyolefin (i) forming the sheath is 5/95 to 50/50, preferably 50/50. 10/90 to 40/60, more preferably 10
It is preferably in the range of / 90 to 20/80.

If the proportion of the polyolefin (ii) forming the core of the composite fiber is less than 5, the strength of the composite fiber may be insufficient, and the polyolefin (ii) in the composite fiber may be insufficient.
If the ratio exceeds 50, the composite fiber may be inferior in flexibility.

The spunbonded nonwoven fabric prepared from the core-sheath type conjugate fiber whose sheath portion is formed from the above-mentioned ethylene polymer has most or all of the surface of the conjugate fiber constituting the nonwoven fabric made of the above-mentioned ethylene polymer. Therefore, it is excellent in flexibility as compared with a conventional nonwoven fabric made of polypropylene. Further, when the conjugate fiber constituting the nonwoven fabric is a crimped fiber, the flexibility is further improved.

As such a composite fiber, for example,
(1) a coaxial core-sheath composite fiber composed of a sheath formed of an ethylene-based polymer and a core formed of a propylene-based polymer, (2) a sheath formed of an ethylene-based polymer And an eccentric core-sheath type composite fiber comprising a propylene-based polymer and a core formed of a propylene-based polymer. Among them, the eccentric core-sheath composite fiber of (2) is a crimped fiber.

FIGS. 1 and 2 are schematic sectional views of the core-sheath type composite fiber. FIG. 1 shows a schematic cross section of a concentric core-sheath composite fiber, and FIG. 2 shows a schematic cross section of an eccentric core-sheath composite fiber. In addition, PP in the figure shows a core made of a propylene-based polymer, and PE shows a sheath made of an ethylene-based polymer.

Further, in the present invention, if necessary, the polyolefin (i) forming the sheath portion and / or the polyolefin (ii) forming the core portion may be mixed with another polymer, as long as the object of the present invention is not impaired. A coloring material, a heat stabilizer, a nucleating agent, a slip agent and the like can be blended.

[Side-by-Side Type Composite Fiber] The side-by-side type conjugate fiber used in the present invention comprises the above-mentioned polyolefin (i) and (ii), and has a lower melting point than that of the high melting point polyolefin (ii). i) A higher content is preferred in terms of adhesion to the breathable polyolefin film (b). The content of the low-melting polyolefin (i) is usually 95 to 50% by weight, preferably 90 to 70% by weight, and more preferably 90 to 80% by weight.
It is.

FIG. 3 is a schematic sectional view of a side-by-side type conjugate fiber. In the drawings, PP indicates a propylene-based polymer part, and PE indicates an ethylene-based polymer part. Further, in the present invention, if necessary, the polyolefin (i) and / or the polyolefin (ii) may contain other polymers, coloring materials, heat stabilizers, and the like, as long as the object of the present invention is not impaired.
A nucleating agent, a slip agent and the like can be blended.

[Preparation of Spunbonded Nonwoven Fabric] The spunbonded nonwoven fabric comprising the above-mentioned conjugate fiber can be prepared by a conventionally known method. For example, a polyolefin (i) forming a sheath portion and a polyolefin forming a core portion ( ii)
Is produced simultaneously with melt spinning by a composite spunbonding method, and the web is needle-punched or heat-fused to prepare a spunbonded nonwoven fabric composed of core-sheath type composite fibers. At this time, the spun fibers are drawn and stretched using an air flow, a water flow, or a centrifugal force, and the drawn fibers are received by a conveyor or the like to form a sheet-like web.

The fiber diameter of the fibers forming the spunbonded nonwoven fabric is usually about 5 to 30 μm, preferably 1 to 30 μm.
It is about 0 to 20 μm. The dry basis weight of the spunbonded nonwoven fabric (a) used in the present invention is usually 18 to 30 g / m.
² , preferably 20 to 25 g / m ² .

Breathable Polyolefin Film (b) The breathable polyolefin film (b) used in the present invention is not particularly limited as long as it is a polyolefin film having good breathability. Polyethylene film) is preferably used.

Here, the “air permeability” in the air-permeable polyolefin film (b) is generally defined by blending a filler such as charcoal to form a film and then performing uniaxial or biaxial stretching. 2000g /
It refers that it is m ^2/24 hr or more, are also included by the needle hole processing.

As the ethylene-based polymer forming such a polyethylene-based film, specifically, a homopolymer of ethylene (the production method may be either a low-pressure method or a high-pressure method) or ethylene, propylene, And random copolymers with α-olefins such as -butene, 1-hexene, 4-methyl-1-pentene and 1-octene.

The thickness of the breathable polyolefin film (b) used in the present invention is usually 15 to 30 μm, preferably 18 to 22 μm. In the present invention, it is particularly preferable that the breathable polyolefin film (b) is made of the same material as the low-melting-point polyolefin (i) of the core-sheath type composite fiber and the side-by-side type composite fiber described above from the viewpoint of melt adhesion.

Next, a method for producing a spun-bonded nonwoven laminated sheet according to the present invention will be described.

In the present invention, the spunbonded nonwoven fabric (a) prepared from the core-sheath type composite fiber or the side-by-side type composite fiber described above and the air-permeable polyolefin film (b) are superposed, and the surface temperature is changed to the air-permeable polyolefin film. (B) a metal roll having a smooth surface having a melting point of −5 ° C. to a melting point of + 5 ° C., and a surface temperature of 100 ° C.
A spun-bonded nonwoven laminated sheet is prepared by passing through a soft roll having the following smooth surface so that the surface of the air-permeable polyolefin film (b) comes to the metal roll side and performing thermocompression bonding.

The metal roll used in the present invention has a smooth surface without irregularities. The diameter of the metal roll is usually 10 to 100 cm, preferably 30 to 80 cm.
It is desirable that The surface temperature of the metal roll is in the temperature range from the melting point of the above-mentioned breathable polyolefin film to −5 ° C. to + 5 ° C., preferably from the melting point of −3 ° C. to the melting point +
Desirably, it is in the temperature range of 3 ° C.

The soft roll used in the present invention has a smooth surface without irregularities. Examples of the soft roll include a rubber roll and a paper roll, and a rubber roll is particularly preferable. The diameter of the soft roll is usually 10 to 1
It is desirably 00 cm, preferably 30 to 80 cm. The surface temperature of the soft roll is desirably 100 ° C or lower, preferably 100 to 80 ° C.

In the present invention, usually, the breathable polyolefin film (b) extruded by extrusion molding is supplied to a pair of crimping devices composed of the above-mentioned metal roll and soft roll. In the laminating method using a hot embossing roll, since the bonding area is usually 5 to 40%, the remaining 95
６０60% does not transfer heat. Therefore, the delamination strength decreases. According to the present invention, the entire surface of the contact surface between the spun-bonded nonwoven fabric (a) and the breathable polyolefin film (b) is thermally bonded, so that the disadvantage of the laminating method using the hot embossing roll can be improved.
Further, the spunbonded nonwoven fabric laminated sheet according to the present invention,
It can be produced at a production rate equivalent to the production rate of a spunbonded nonwoven laminated sheet by a lamination method using a hot melt type adhesive.

In the present invention, it is preferable to adjust the nip pressure to 3 to 5 kg / cm ² during the thermocompression bonding. By setting the nip pressure within the above range, a spunbonded nonwoven fabric laminated sheet exhibiting sufficient delamination strength can be obtained.

The spunbonded nonwoven fabric laminated sheet obtained as described above has a 180 ° peel strength in the MD direction (longitudinal direction) and CD direction (lateral direction) of the spunbonded nonwoven fabric laminated sheet of 30 g / inch or more. Preferably, more preferably 40 g / inc.
h or more.

In the nonwoven fabric product made of the spunbonded nonwoven laminate sheet, the allowable wear amount of the nonwoven fabric surface in the MD direction and the CD direction during normal use is 0.2 mg.
/ Cm ² or less, more preferably 0.15 mg / cm ² or less.

The value of Koshi of the spunbonded nonwoven laminated sheet is preferably from 7 to 14, more preferably from 9.0 to 13. The lower the value, the lower the waist and the softer.

These test methods will be described later in Examples. The thickness of the spunbonded nonwoven laminated sheet obtained as described above is usually 100
To 350 μm, preferably 120 to 250 μm.

[0045]

According to the present invention, a spunbond nonwoven laminate sheet having a smooth surface and no variation in delamination strength, and a bulky spunbond nonwoven fabric having a smooth surface and no variation in delamination strength are provided. A laminated sheet can be provided.

The spunbonded nonwoven laminated sheet according to the present invention is suitable for applications such as a backsheet of a breathable paper diaper, a backsheet of a breathable napkin, clothing for agricultural work, and simple clothes for medical use.

[0047]

EXAMPLES The present invention will be described below with reference to examples, but the present invention is not limited to these examples.

A peel test was carried out on the spunbonded nonwoven laminated sheets obtained in Examples and Comparative Examples.
The abrasion test and the waist (Koshi) value measurement test on the nonwoven fabric surface were performed according to the following methods.

(1) Peeling Test Five pieces each of a spunbonded nonwoven laminated sheet were cut in the MD direction and the CD direction in a size of 25 mm (1 inch) × 200 mm in length to prepare test pieces. Next, the obtained test piece was placed on a chuck of a tensile tester by a distance between chucks 1.
And fixed at a speed of 300 mm / min.
A 0 ° peel test was performed, and five peaks with high peel strength recorded on the chart were selected, and the average value of the five peel strengths was taken as the peel strength of the test piece. Peel strength is 30g / i
Samples of nch or more were accepted.

(2) Abrasion test Using a Gakushin type friction fastness tester, a 4
Paste 00 mesh sandpaper and put 1 on the cradle
After fixing a 4cm x 20cm sample with tape with the nonwoven fabric surface facing up, the nonwoven fabric surface is reciprocated 20 times with sandpaper to perform an abrasion test, and the entire amount of the abraded material is adhered to the adhesive tape to measure the amount. The amount of abraded material per unit area was defined as the amount of abrasion. Wear amount is 0.2mg / c
m ² or less of the sample was evaluated as acceptable.

(3) Method of measuring waist value (Koshi) KES (Kawabata Evaluation) of Kato Tech Co., Ltd.
System)-Measure the tension, shear, compression, surface and bending tests under the knit high-sensitivity condition and measure under the knit underwear (summer) condition using the FB system, and measure the Koshi value. It was measured.

The KES performs data processing by a computer by measuring a plurality of characteristic values associated with the non-linearity of the mechanical characteristics of the cloth and measuring 15 physical quantities relating to touch and hand.

Samples having a Koshi value of 14.0 or less were accepted.

[0054]

Example 1 A coaxial core-sheath type composite fiber formed from a breathable polyethylene film having the following physical properties, a core made of polypropylene having the following physical properties, and a sheath made of polyethylene having the following physical properties ( Polyethylene / polypropylene (weight ratio) = 8/2, fiber diameter = 25μ
m), a mirror metal roll having a surface temperature of 120 ° C. (roll diameter = 30)
cm) and a rubber roll having a surface temperature of 100 ° C. (roll diameter = 30 cm) so that a breathable polyethylene film comes to the mirror metal roll side, and a nip pressure of 5 cm.
kg / cm ² and a production speed of 100 m / min.
A 0 μm spunbond nonwoven laminate sheet was prepared.

<Breathable polyethylene film> A breathable film "Espoir" manufactured by Mitsui Chemicals, Inc.^TM(Dry basis weight 25g / m^Two, Thickness 20 μm) <Polypropylene> Propylene homopolymer Density = 0.91 g / cm^Three  MFR (230 ° C.) = 65 g / 10 min Mw / Mn = 3 Melting point = 142 ° C. <Polyethylene> Ethylene homopolymer Density = 0.95 g / cm^Three  MFR (190 ° C.) = 30 g / 10 min Mw / Mn = 3.5 Melting point = 127 ° C.

With respect to the spunbonded nonwoven fabric laminated sheet obtained as described above, a peel test, a wear test on the surface of the nonwoven fabric, and a measurement test of Koshi value were performed in accordance with the above-mentioned methods.

The results are shown in Table 1.

[0058]

Example 2 In Example 1, the production speed was set to 250 m /
Except that the thickness was changed to 18 minutes in the same manner as in Example 1.
A 0 μm spunbond nonwoven laminate sheet was prepared.

With respect to the spunbonded nonwoven fabric laminated sheet obtained as described above, a peeling test, a wear test on the surface of the nonwoven fabric, and a measurement test of Koshi value were performed in accordance with the above-mentioned methods.

The results are shown in Table 1.

[0061]

Example 3 In Example 1, the thickness was changed in the same manner as in Example 1 except that the surface temperature of the mirror metal roll was changed to 116 ° C., the surface temperature of the rubber roll was changed to 90 ° C., and the production speed was changed to 150 m / min. A 180 μm spunbonded nonwoven laminated sheet was prepared.

With respect to the spunbonded nonwoven laminated sheet obtained as described above, a peeling test, a wear test on the surface of the nonwoven fabric, and a measurement test of Koshi value were performed in accordance with the above-mentioned methods.

Table 1 shows the results.

[0064]

Comparative Example 1 The same breathable polyethylene film as in Example 1 and the same spunbonded nonwoven fabric as in Example 1 were overlaid. An embossing roll having a surface temperature of 120 ° C. (roll diameter = 30 cm) and a surface temperature of 100 ° C. The spun-bonded nonwoven fabric is passed between the mirror metal roll (roll diameter = 30 cm) and the mirror metal roll side, the nip pressure is set to 5 kg / cm ² , and the breathable polyethylene film and the spunbonded nonwoven fabric are bonded together. 180
The production speed had to be reduced to 30 m / min to obtain a spunbonded nonwoven laminated sheet with a peel strength of 25 g / inch.

[0065]

COMPARATIVE EXAMPLE 2 The same breathable polyethylene film as in Example 1 and the same spunbond nonwoven fabric as in Example 1 were superimposed. An embossing roll having a surface temperature of 120 ° C. (roll diameter = 30 cm) and a surface temperature of 83 ° C. between the silicone rubber roll (roll diameter = 30 cm), passed through as spunbonded nonwoven fabric comes to embossing roll side, was bonded at 60 m / min and a nip pressure of 5 kg / cm ^2, the spunbonded nonwoven fabric It melted and wrapped around the embossing roll.

[0066]

Comparative Example 3 In Comparative Example 2, the surface temperature of the embossing roll was 116 ° C. and the surface temperature of the silicone rubber roll was 7
A 200 μm-thick spunbonded nonwoven laminated sheet was prepared under the same conditions as in Comparative Example 2 except that the temperature was changed to 0 ° C.

With respect to the spunbonded nonwoven fabric laminated sheet obtained as described above, a peeling test, a wear test on the surface of the nonwoven fabric, and a measurement test of Koshi value were carried out in accordance with the above-mentioned methods.

Table 1 shows the results. In terms of physical properties, Comparative Example 3 passed, but a remarkable difference was observed in production speed.

[0069]

[Table 1]

[Brief description of the drawings]

FIG. 1 is a schematic cross-sectional view showing a coaxial core-sheath composite fiber.

FIG. 2 is a schematic sectional view showing an eccentric core-sheath composite fiber.

FIG. 3 is a schematic sectional view showing a side-by-side type composite fiber.

──────────────────────────────────────────────────続 き Continued on front page (51) Int.Cl. ⁶ Identification code FI D01F 8/06 D01F 8/06 D04H 13/00 D04H 13/00 D06M 17/00 D06M 17/00 Z // B29K 23:00 B29L 9:00

Claims (4)

[Claims] A core-sheath type composite fiber comprising a sheath made of a polyolefin (i) and a core made of a polyolefin (ii) having a melting point higher than that of the polyolefin (i) of the sheath, or the polyolefin (i). And a spunbond nonwoven fabric (a) prepared from a side-by-side conjugate fiber composed of the polyolefin (ii) and a breathable polyolefin film (b) are superimposed, and the surface temperature is the melting point of the breathable polyolefin film (b). The surface of the air-permeable polyolefin film (b) is located between the smooth metal roll having a temperature range of -5 ° C to the melting point + 5 ° C and the smooth roll having a surface temperature of 100 ° C or less. A method for producing a spunbonded nonwoven laminated sheet, wherein the laminated sheet is subjected to thermocompression bonding. 2. The spunbonded nonwoven fabric (a) is a spunbonded nonwoven fabric prepared from a core-sheath composite fiber comprising a sheath made of an ethylene polymer and a core made of a propylene polymer, The method according to claim 1, wherein the breathable polyolefin film (b) is a polyethylene film. 3. The method according to claim 1, wherein the soft roll is a rubber roll. 4. A nip pressure of 3 to 5 k during the thermocompression bonding.
spunbonded nonwoven laminate sheet producing method according to claim 1, characterized in that adjusting the g / cm ^2.