JP2019173194A - Composite structure and apparatus for producing the same - Google Patents

Abstract

To provide a composite structure which is excellent in processability and free from the falling-off of fibers or a product, which is not longitudinally elongated or laterally shrunk, and which can be formed while the settings of bulky processing and mechanical strength are arbitrarily performed.SOLUTION: A composite structure is obtained by embossing using embossing rollers 60 and an embossing protrusion roller 61 while setting an X-axis component orthogonal to the transfer direction of spun-bonded nonwoven fabric layers 10A, 20A, 30A, and a Y-axis component orthogonal to the X-axis component as follows: when the width of a heat-fused part in an X-axis component direction is represented by Xa, and the width of a non-fused part in the direction is represented by Xb, Xa and Xb are in a range satisfying Xa<Xb; a length Ya of the heat-fused part in a Y-axis component direction and a length Yb of the non-heat-fused part in the Y-axis component direction are adjacently arranged on one straight line in the Y-axis component direction while a surface having the width Xa of the heat-fused part and the length Ya of the heat-fused part is set as a heat-fused surface; and, in such arrangement, both sides of a 1/2 position in the Y-axis component direction of the length Ya of the heat-fused part are each set to the length Yb of the non-heat-fused part, and both sides of a 1/2 position in the Y-axis component direction of the length Yb of the non-heat-fused part are each set to the length Ya of the heat-fused part.SELECTED DRAWING: Figure 1

Description

The present invention is, for example, a composite structure comprising a plurality of layers of non-woven fabric used for fabrics for protective clothing, waterproof sheets, pillow covers, nursing sheets, disposable diapers, pet sheets, towels, chemical cloths, automobile interiors, civil engineering materials. The present invention relates to a body and a manufacturing apparatus thereof.
More specifically, as a composite structure, cleaning sheets, floor protection, floor cleaning such as polishing, and functional sheets for waxing floor materials used for cleaning, wet tissues, wipes, body wipes, makeup This technique can also be used for dropping.

Specific uses of the composite structure include clothing members, medical members, civil engineering / architectural components, automotive interior / component components, sanitary components, interior components, bedding components, agricultural components, leather components, Industrial material members, daily life material members, and the like.
In particular, a composite structure that is soft but firmly bonded, does not expand and contract in the vertical and horizontal directions, and has high strength has been desired.

  In patent document 1, the permeable sheet which permeate | transmits the water | moisture content containing urine, the crepe-like liquid absorption permeable sheet | seat, the absorptive core which is provided in the lower surface of an absorptive core, and absorbs the water | moisture content containing a urine, on the lower surface of an absorptive core The crepe-like liquid-absorbent permeable sheet and the impervious sheet that does not allow the permeation of moisture, including urine, are sequentially laminated, and the absorbent core and the liquid-absorbent and liquid-permeable sheets on both sides are permeable. A composite structure is disclosed that is enclosed and contained between a sheet and an impermeable sheet.

  As in Patent Document 1, the timing of replacement of the pet sheet becomes longer, and not only the pet sheet, but also care sheets, disposable diapers, waterproof sheets, etc. become heavy with urine and excrement and can be broken during work. Insufficient mechanical strength is produced, making it impossible to process easily. Also, when it comes to pillow covers, protective clothing fabric, etc., sweat and body odor will soak up and you will feel unclean, and you will try to work in places with as little unclean feeling as possible. It may become insufficient. On the contrary, when the mechanical strength is increased, the bulk is lowered, the density is increased, and the mechanical strength is increased, but the permeation of sweat and body odor of the nonwoven fabric itself is lowered.

Further, Patent Document 2 includes a composite structure including at least two non-woven polymer layers bonded to each other, and one non-woven polymer layer including an inorganic particulate filler in an amount of about 40% by mass or less of the non-woven layer. It is a thing.
Polymer nonwovens, such as polypropylene (PP) nonwovens, are used in many applications, and in the hygiene and medical markets, a large proportion of spunmelt nonwovens are used, and spunbond nonwovens and meltblown nonwovens are combined with composite nonwoven structures. Has been. Usually, a melt blown nonwoven fabric is used for the inner layer, and a spunbond nonwoven fabric is used for the outer layer. Melt blow of the inner layer becomes a barrier layer, but fine fibers (diameter of about 2 μm or less) that provide a good barrier also result in very weak fibers and fabrics. A spunbond layer (fiber diameter of about 15 μm) is incorporated to give the composite fabric sufficient strength for processing in the processing line, along with the function in the intended application.

JP 2012-187033 A JP-T-2016-516910

Hereinafter, a composite structure constituted by superposing a spunbond nonwoven fabric and a melt blown nonwoven fabric will be briefly described.
In the composite structure of general Patent Document 2, the spunbond nonwoven fabric is often thermally bonded by a raised shape, but the polypropylene is partially melted, deformed and melted by a combination of heat and pressure. Glue. If the nonwoven fabric bond, which is a combination of temperature, pressure, speed and emboss shape, is too weak, the individual fibers will be pulled away from the point of adhesion or the bond site will collapse and the elongation at break will be relatively large.
If the nonwoven fabric is too tightly bonded, excessive melting at the bond point will cause the fiber to be weak, the fiber will break at the bond point, and the elongation at break will be very small. When the optimum bonding conditions are met, the majority of fiber breaks occur between the bonding points. This gives the fabric with the highest tensile strength, and the elongation is intermediate between the two extreme values.

Since meltblown nonwoven fabrics become ultrafine fibers at high temperatures and do not have the same strength and crystallinity as spunbond nonwoven fabrics, meltblown nonwoven fabrics melt or deform at a lower temperature than spunbond nonwoven fabrics. Therefore, there is a tendency that the adhesion of the spunbonded nonwoven fabric is too weak depending on the bonding conditions used to overlap and bond the spunbonded nonwoven fabric, the meltblown nonwoven fabric, and the spunbonded nonwoven fabric so that the barrier performance is maintained.
In particular, unless the use of clothing members, medical members, automotive interior / component members, civil engineering / architectural members, etc. is determined, a good bulky functional nonwoven fabric with high mechanical strength could not be obtained.

  In view of this, the present invention eliminates the problems of the prior art by providing good processability even when dry or wet, no fibers falling off, and strong elasticity even when overlapped, resulting in longitudinal elongation and lateral shrinkage. Accordingly, it is an object of the present invention to provide a composite structure that is soft at the time of use, and capable of arbitrarily setting the bulk processing and mechanical strength, and an apparatus for manufacturing the same.

  The composite structure according to the invention of claim 1 is obtained by heat-sealing a spunbond nonwoven fabric layer (a “layer” of a nonwoven fabric layer means a nonwoven fabric having a thickness other than “0”) formed by stacking two or more layers. When all layers are fused simultaneously, the X-axis component orthogonal to the mechanical transfer direction of the spunbond nonwoven fabric layer, the Y-axis component orthogonal to the X-axis component (mechanical transfer direction of the manufacturing machine) is: When the width Xa of the heat-sealed portion in the X-axis component direction and the width Xb of the non-fused portion are Xa <Xb, the length Ya of the heat-sealed portion in the Y-axis component direction and the Y-axis component The length Yb of the portion not heat-sealed in the direction is an arrangement on the straight line in the Y-axis component direction, and both sides of the half position in the Y-axis component direction of the length Ya of the heat-welded portion are heat-sealed. The length Yb of the portion not to be welded and the ½ position in the Y-axis component direction of the length Yb of the portion not heat-sealed Both sides is set to the length Ya of the heat-sealed portion comprises an embossed with heat-sealed to the surface of the length Ya of the width Xa and heat-sealed portion of the heat sealing portion of.

Here, the spunbonded nonwoven fabric layer that is laminated and fused with two or more layers may be a laminate of only the spunbonded nonwoven fabric layer directly with “spunbond nonwoven fabric layer” + “spunbond nonwoven fabric layer”, A combination of “spunbond nonwoven fabric layer” + “meltblown nonwoven fabric layer” + “spunbond nonwoven fabric layer” in which “meltblown nonwoven fabric layer” is laminated between “spunbond nonwoven fabric layer” and “spunbond nonwoven fabric layer” may be used. That is, the “spunbond nonwoven fabric layer” that is laminated and fused in two or more layers only needs to form a plurality of layers. For example, the “melt blown nonwoven fabric layer” may form one or more nonwoven fabrics. Good. As a result, as long as it has a “spunbond nonwoven fabric layer” that is laminated and fused in two or more layers, it may have other nonwoven fabric layers and synthetic resin layers.
The "melt blown nonwoven fabric layer" means that a melted thermoplastic resin is placed after the extruder and a high-speed and high-temperature air current is blown out from the placed die (spinner) onto a net conveyor or collection screen. A self-adhesive web having a fiber size of φ1 to 15 μm and usually about 2 to 4 μm was created by suction.
Thus, for example, when there are two or more “spunbond nonwoven fabric layers”, “spunbond nonwoven fabric layer” + “spunbond nonwoven fabric layer” + “spunbond nonwoven fabric layer”, “melt blown nonwoven fabric layer” + “spunbond” Nonwoven fabric layer + Spunbond nonwoven fabric layer, Spunbond nonwoven fabric layer + Meltblown nonwoven fabric layer + Spunbond nonwoven fabric layer, Spunbond nonwoven fabric layer + Spunbond nonwoven fabric layer + Meltblown nonwoven fabric Layer ".

The X-axis component orthogonal to the transport direction of the spunbond nonwoven fabric layer, the Y-axis component orthogonal to the X-axis component are the width Xa of the heat-sealed portion in the X-axis component direction, the width Xb of the non-fused portion In this case, the range is Xa <Xb.
The length Ya of the heat-sealed portion in the Y-axis component direction and the length Yb of the non-heat-fused portion in the Y-axis component direction are “the width Xa of the heat-fused portion” × “the heat-sealed portion. In the arrangement on the straight line of the adjacent Y-axis component direction, the surface of the length “Ya” is the heat-sealing surface, and both sides of the 1/2 position of the length Ya of the heat-welded portion in the Y-axis component direction are heat-sealed. The length Yb of the part not to be welded and both sides of the half-position in the Y-axis component direction of the length Yb of the part not heat-sealed are embossed to set the length Ya of the heat-sealed part.

  The composite structure according to claim 2, wherein both sides of the half position of the length Ya of the heat fusion portion in the Y-axis component direction depend on the width of the heat fusion portion parallel to the X-axis component direction. It is connected.

  The manufacturing apparatus of the composite structure according to the invention of claim 3 is a manufacturing process of a spunbond nonwoven fabric layer in which two or more layers are overlapped. When the X-axis component orthogonal to the transfer direction and the Y-axis component orthogonal to the X-axis component are the width Xa of the heat fusion portion in the X-axis component direction and the width Xb of the non-fused portion, Xa < The length Ya of the heat-sealed portion in the Y-axis component direction and the length Yb of the portion not heat-fused in the Y-axis component direction are arranged on a straight line in the Y-axis component direction. Further, both sides of the half position in the Y-axis component direction of the length Ya of the heat-sealed portion are the length Yb of the portion not heat-fused and the length Yb of the portion not heat-fused is 1 in the Y-axis component direction. The both sides of the / 2 position are set to the length Ya of the heat fusion part, and the width Xa of the heat fusion part and the heat fusion part The surface of the length Ya; and a heat-sealed embossing process.

Here, the “spunbond nonwoven fabric layer” that is fused by overlapping two or more layers means that only “spunbond nonwoven fabric layer” is directly overlapped with “spunbond nonwoven fabric layer” + “spunbond nonwoven fabric layer”. Alternatively, a combination of “spunbond nonwoven fabric layer” + “meltblown nonwoven fabric layer” + “spunbond nonwoven fabric layer” in which a “meltblown nonwoven fabric layer” is laminated between a “spunbond nonwoven fabric layer” and a “spunbond nonwoven fabric layer” But you can. That is, the “spunbond nonwoven fabric layer” that is laminated and fused in two or more layers may be any layer that forms a plurality of layers, and the “meltblown nonwoven fabric layer” may be one that forms one or more nonwoven fabrics. That is, as long as it has a “spunbond nonwoven fabric layer” that is laminated and fused in two or more layers, it may have other nonwoven fabric layers and synthetic resin layers.
The “melt blown nonwoven fabric layer” refers to a melted thermoplastic resin placed after the extruder and blown out from the installed die (spinner) onto a net conveyor or collection screen with a high-speed and high-temperature airflow, fiber Is a self-adhesive web having a size of φ1 μm to 15 μm and usually about 2 to 4 μm.

Thus, for example, when there are two or more “spunbond nonwoven fabric layers”, “spunbond nonwoven fabric layer” + “spunbond nonwoven fabric layer” + “spunbond nonwoven fabric layer”, “melt blown nonwoven fabric layer” + “spunbond” Nonwoven fabric layer + Spunbond nonwoven fabric layer, Spunbond nonwoven fabric layer + Meltblown nonwoven fabric layer + Spunbond nonwoven fabric layer, Spunbond nonwoven fabric layer + Spunbond nonwoven fabric layer + Meltblown nonwoven fabric Layer ".
The X-axis component orthogonal to the transport direction of the spunbond nonwoven fabric layer, the Y-axis component orthogonal to the X-axis component are the width Xa of the heat-sealed portion in the X-axis component direction, the width Xb of the non-fused portion In this case, the range is Xa <Xb.
The length Ya of the heat-sealed portion in the Y-axis component direction and the length Yb of the non-heat-fused portion in the Y-axis component direction are “the width Xa of the heat-fused portion” × “the heat-sealed portion. In the arrangement on the straight line of the adjacent Y-axis component direction, the surface of the length “Ya” is the heat-sealing surface, and both sides of the 1/2 position of the length Ya of the heat-welded portion in the Y-axis component direction are heat-sealed. The length Yb of the portion not to be welded and the length Yb of the portion not to be heat-sealed at both positions in the Y-axis component direction are set to the length Ya of the heat-sealed portion and embossed.

The composite structure of the invention of claim 1 has an X-axis component perpendicular to the transport direction of the spunbonded nonwoven fabric layer when the spunbonded nonwoven fabric layer formed by superimposing two or more layers is fused by thermal fusion. The Y-axis component perpendicular to the X-axis component is in the range of Xa <Xb, where the width Xa of the heat-sealed portion in the X-axis component direction and the width Xb of the non-fused portion.
Further, the length Ya of the heat-sealed portion in the Y-axis component direction and the length Yb of the portion not heat-fused in the Y-axis component direction are arranged on a straight line in the Y-axis component direction. Both sides of the half position of the length Ya in the Y-axis component direction are the length Yb of the portion that is not heat-sealed, and both sides of the length Yb of the portion Yb that is not heat-sealed in the Y-axis component direction Is set to the length Ya of the heat-sealed portion, and embossing is performed by heat-sealing the surfaces of the width Xa of the heat-fused portion and the length Ya of the heat-fused portion.

In particular, by using special embossing, a composite structure that is soft but firmly bonded, does not extend in the vertical direction, and has high strength is obtained.
Therefore, the spunbond nonwoven fabric layer formed by stacking two or more layers can have an arbitrary bulky thickness on the soft object or the human body side. A melt blown nonwoven fabric layer or the like can be incorporated as required.
When two or more layers of the spunbond nonwoven fabric are overlapped and all layers are fused by heat fusion, first, the X-axis component orthogonal to the transport direction of the spunbond nonwoven fabric layer, and orthogonal to the X-axis component When the Y-axis component is the width Xa of the heat-sealed portion in the X-axis component direction and the width Xb of the portion that is not fused, the range is Xa <Xb, and the width Xb of the portion that is not fused is Is also narrow.

  The length Ya of the heat-sealed portion in the Y-axis component direction and the length Yb of the portion not heat-fused in the Y-axis component direction are the length Ya of the heat-sealed portion on a straight line in the Y-axis component direction and The length Yb of the portion that is not heat-sealed is disposed, the length Yb of the portion that is not heat-sealed on both sides of the half-position in the Y-axis component direction of the length Ya of the heat-sealed portion, and is not heat-sealed The both sides of the half position in the Y-axis component direction of the length Yb of the portion are set to the length Ya of the heat fusion portion, and the surface of the heat fusion portion width Xa and the heat fusion portion length Ya is heated. Since the fusion embossing is performed, not only the X-axis component direction and the Y-axis component direction, but also the slack that does not cause longitudinal stretching or lateral contraction is strong against an oblique external force. In particular, since the embossing is performed by thermally fusing the surfaces of the width Xa of the heat-sealed portion and the length Ya of the heat-welded portion, the longitudinal stretch and the lateral shrinkage counteract as internal strains. In particular, the resistance to longitudinal stretch and lateral shrinkage is strong, and the shape does not change.

Further, the length Ya of the heat-sealed portion in the Y-axis component direction and the length Yb of the non-heat-bonded portion in the Y-axis component direction can be processed and are soft and fiber when the product is used (wet). In addition, there is no dropout of the product, and there is a strong waist that does not cause longitudinal stretch or lateral shrinkage, so that bulky processing and mechanical strength can be arbitrarily formed.
Processability is good even when dry or wet, soft when used, no fibers falling off, firm even when overlapped, with no bulky stretch or lateral shrinkage, and arbitrarily set bulk processing and mechanical strength The composite structure can be made.
In this way, it has good processability even when dry or wet, it is soft when used and does not lose fibers, and even when overlapped, it is strong and does not stretch vertically or shrink, and it is bulky and mechanically strong. A composite structure in which can be arbitrarily set is obtained.

  In the composite structure of the invention of claim 2, both sides of the half position of the length Ya of the heat fusion portion in the Y-axis component direction are connected by the width of the heat fusion portion parallel to the X-axis component direction. Therefore, in addition to the effect of the first aspect, the external force applied to the number of X-axis component directions becomes substantially uniform with the external force applied in the other direction. Therefore, the composite structure of the present invention has a strong resistance to vertical and horizontal expansion and horizontal and vertical contraction as a whole even if an external force is applied to any of the surroundings, and does not change in shape.

The apparatus for producing a composite structure of the invention of claim 3 is such that when all layers of the spunbond nonwoven fabric layer formed by superposing two or more layers are fused together by heat fusion, X is orthogonal to the transport direction of the spunbond nonwoven fabric layer. The X-axis component and the Y-axis component orthogonal to the X-axis component are in the range of Xa <Xb when the width Xa of the heat-sealed portion in the X-axis component direction and the width Xb of the non-fused portion are set.
Further, the length Ya of the heat-sealed portion in the Y-axis component direction and the length Yb of the portion not heat-fused in the Y-axis component direction are arranged on a straight line in the Y-axis component direction. Both sides of the half position of the length Ya in the Y-axis component direction are the length Yb of the portion that is not heat-sealed, and both sides of the length Yb of the portion Yb that is not heat-sealed in the Y-axis component direction Is set to the length Ya of the heat-sealed portion, and embossing is performed by heat-sealing the surfaces of the width Xa of the heat-fused portion and the length Ya of the heat-fused portion.

Therefore, the spunbond nonwoven fabric layer formed by stacking two or more layers can have an arbitrary bulky thickness on the soft object or the human body side. Moreover, a spunbond nonwoven fabric layer, a resin bond nonwoven fabric layer, a thermal bond nonwoven fabric layer, etc. can be incorporated as needed.
When two or more layers of the spunbond nonwoven fabric are overlapped and all layers are fused by heat fusion, first, the X-axis component orthogonal to the transport direction of the spunbond nonwoven fabric layer, and orthogonal to the X-axis component When the Y-axis component is the width Xa of the heat-sealed portion in the X-axis component direction and the width Xb of the portion that is not fused, the range is Xa <Xb, and the width Xb of the portion that is not fused is Is also narrow.

  The length Ya of the heat-sealed portion in the Y-axis component direction and the length Yb of the portion not heat-fused in the Y-axis component direction are the length Ya of the heat-sealed portion on a straight line in the Y-axis component direction and The length Yb of the portion that is not heat-sealed is disposed, the length Yb of the portion that is not heat-sealed on both sides of the half-position in the Y-axis component direction of the length Ya of the heat-sealed portion, and is not heat-sealed The both sides of the half position in the Y-axis component direction of the length Yb of the portion are set to the length Ya of the heat fusion portion, and the surface of the heat fusion portion width Xa and the heat fusion portion length Ya is heated. Since the fusion embossing is performed, not only the X-axis component direction and the Y-axis component direction, but also the slack that does not cause longitudinal stretching or lateral contraction is strong against an oblique external force. In particular, since the embossing process is performed by heat-sealing the surface of the heat-sealed portion width Xa and the length of the heat-sealed portion Ya, since longitudinal elongation and lateral shrinkage counteract as internal strain, Overall, the resistance to longitudinal stretch and lateral shrinkage is strong, and the shape does not change.

Further, the length Ya of the heat-sealed portion in the Y-axis component direction and the length Yb of the non-heat-bonded portion in the Y-axis component direction can be processed and are soft and fiber when the product is used (wet). In addition, there is no dropout of the product, and there is a strong waist that does not cause longitudinal stretch or lateral shrinkage, so that bulky processing and mechanical strength can be arbitrarily formed.
In this way, it has good processability even when dry or wet, it is soft when used and does not lose fibers, and even when overlapped, it is strong and does not stretch vertically or shrink, and it is bulky and mechanically strong. A composite structure manufacturing apparatus in which can be arbitrarily set is obtained.

FIG. 1 is a conceptual diagram showing the overall configuration of the composite structure according to Embodiment 1 of the present invention. FIG. 2 is a conceptual diagram showing the overall configuration of the composite structure according to Embodiment 2 of the present invention. FIG. 3 is a development explanatory view of an emboss pattern used in the composite structure according to the first and second embodiments of the present invention. FIG. 4 is an enlarged development explanatory view of an emboss pattern used in the composite structure according to Embodiment 1 and Embodiment 2 of the present invention. FIG. 5 is a development explanatory view of another example of the emboss pattern used in the composite structure according to the first and second embodiments of the present invention.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. Note that, in the embodiments, the same reference numerals and the same reference numerals are the same or corresponding functional parts, and therefore, redundant description thereof is omitted here.

[Embodiment 1]
The composite structure according to the first embodiment mainly has a first spunbond nonwoven fabric production machine 10, a second spunbond nonwoven fabric production machine 20, a third spunbond nonwoven fabric production machine 30, and a convex portion 65 that performs embossing. The whole embossing roller 60 is comprised from the embossing convex part roller 61 and the embossing smooth roller 62 which consists of a specific curvature surface.

  Each of the first spunbond nonwoven fabric production machine 10, the second spunbond nonwoven fabric production machine 20, and the third spunbond nonwoven fabric production machine 30 is an apparatus for producing a nonwoven fabric directly from spinning. In addition, the embossing convex roller 61 and the embossing smooth roller 62 can make the embossing convex roller 61 and the embossing smooth roller 62 into the convex part 65 of 1/2 height. However, the rotation timing needs to be the same. Further, the embossed convex roller 61 and the embossed smooth roller 62 may be reversed. The embossed smooth roller 62 may be of the same diameter formed with a predetermined diameter.

  The first spunbond nonwoven fabric production machine 10, the second spunbond nonwoven fabric production machine 20, and the third spunbond nonwoven fabric production machine 30 use a polypropylene (PP) copolymer as a raw material to be a base material, and have a soft long fiber span. It forms a bonded nonwoven fabric, and it is desirable to finish the basis weight as thin as 8-12 grams. Moreover, each 1st spunbond nonwoven fabric manufacturing machine 10, the 2nd spunbond nonwoven fabric manufacturing machine 20, and the 3rd spunbond nonwoven fabric manufacturing machine 30 make each basic weight uniform, and each spunbond nonwoven fabric layer 10A, 20A, 30A is soft. Is determined. In addition, the “layer” of the nonwoven fabric layer means a nonwoven fabric whose thickness is not “0”.

The first spunbond nonwoven fabric production machine 10, the second spunbond nonwoven fabric production machine 20, and the third spunbond nonwoven fabric production machine 30 are laminated with the spunbond nonwoven fabric layers 10A, 20A, 30A, and a spunlace treatment section (water jet) to be described later ) To hydroentangle the spunbonded nonwoven fabric. Moreover, after the process which dried the water | moisture content mentioned later, spun bond nonwoven fabric layers 10A, 20A, and 30A are adhere | attached by embossing. This prevents fibers from falling off, suppresses longitudinal elongation, and improves processing performance. Moreover, it can be finished in a pattern similar to the mesh pattern of the conventional spunbond nonwoven fabric layers 10A, 20A, and 30A with a special emboss pattern.
In addition, although the adhesion part of the actual embossing pattern adhered by the embossing convex part roller 61 which formed the convex part 65 which performs embossing is transparent, this is not necessarily a hole, but the base material polypropylene. Since the (PP) fiber portion is melted by heat and integrated only by appearing transparent, longitudinal and lateral elongation can also be suppressed. Since the wiped dirt and the like do not pass from the front surface to the back surface, the dirt does not adhere to the hand having the nonwoven fabric.

  Conventional non-woven fabric manufacturing machines generally have a two-stage process: processing pellets from molten resin to short fibers, then short fiber yarns to non-woven fabrics. In this embodiment, the spunbond manufacturing machine So, from spinning to formation of non-woven fabric, it is processed consistently to speed up production. In addition, since long fibers are used, the strength is high, the dimensional stability is excellent, and it is used in various applications. That is, the spunbond nonwoven fabric layers 10A, 20A, and 30A are not made of cotton-like fibers such as dry nonwoven fabric, but are made of rice-like synthetic resin pellets having a diameter of about 3 to 5 mm. Non-woven fabric is produced by making it into a web. There are composite types of polypropylene (PP) and polyethylene (PE), polylactic acid (PLA) -based biodegradation types, etc., which are selected depending on the application, depending on the choice of raw materials and manufacturing processes.

A first spunbond nonwoven fabric manufacturing machine 10 as a composite structure of the first embodiment includes a hopper 11 that supplies raw material pellets, and an extruder 12 that melts the raw materials supplied to the hopper 11 and extrudes molten pellets. The molten resin extruded from the extruder 12 is ejected as continuous long fibers from the nozzle 13, cooled, and the web is collected as continuous long fibers through the ejector 14 that is moved at high speed, and is sucked by the net conveyor 15. Sprayed onto the upper surface of the net conveyor 15.
The net conveyor 15 is provided with a suction portion 16 for sucking air therein, and is sucked downward by an air pump disposed outside. Therefore, the spunbond nonwoven fabric layer 10 </ b> A is laminated on the upper surface of the net conveyor 15.

Similarly, the second spunbond nonwoven fabric manufacturing machine 20 includes a hopper 21 for supplying raw material pellets, an extruder 22 for melting and extruding raw material pellets supplied to the hopper 21, and a molten resin extruded from the extruder 22. Is ejected from the nozzle 23, collected as continuous long fibers through the ejector 24, and ejected onto the net conveyor 25.
The net conveyor 25 has a suction portion 26 disposed therein, and is sucked downward by an air pump disposed outside. Therefore, the spunbond nonwoven fabric layer 20 </ b> A is laminated on the upper surface of the net conveyor 25. The feed roller 27 guides the spunbond nonwoven fabric layer 20A. Moreover, the conveyance conveyor 28 sends the spunbond nonwoven fabric layers 10A, 20A, and 30A.

Similarly, the third spunbond nonwoven fabric manufacturing machine 30 includes a hopper 31 for supplying raw material pellets, an extruder 32 for melting and extruding raw material pellets supplied to the hopper 31, and a molten resin extruded from the extruder 32. Is ejected from the nozzle 33, collected by the ejector 34 as continuous long fibers, and ejected onto the net conveyor 35.
The net conveyor 35 has a suction portion 36 disposed therein and is sucked downward by an air pump disposed outside. Therefore, the spunbond nonwoven fabric layer 30 </ b> A is laminated on the upper surface of the net conveyor 35. The feed roller 37 guides the spunbond nonwoven fabric layer 30A.

The net conveyor 15 has a suction portion 16 disposed therein, and is sucked from the upper surface of the net conveyor 15 toward the lower surface by an unillustrated air pump disposed outside. Therefore, the spunbonded nonwoven fabric layer 10A spun on the upper surface of the net conveyor 15 and cooled, stretched, opened, and collected is formed.
Similarly, the net conveyor 25 has a suction portion 26 disposed therein, and is sucked by an air pump (not shown) disposed outside. Therefore, the spunbonded nonwoven fabric layer 20A spun on the upper surface of the net conveyor 25 and cooled, stretched, opened, and collected is formed.
The net conveyor 35 has a suction portion 36 disposed therein, and is sucked by an air pump (not shown) disposed outside. Therefore, the spunbonded nonwoven fabric layer 30 </ b> A that is spun and cooled, stretched, opened, and collected is formed on the upper surface of the net conveyor 35.

  Laminated fiber webs of long fibers extruded by hoppers 11, 21, 31 and extruders 12, 22, 32 and continuously ejected from nozzles 13, 23, 33 are laminated with water as short fibers such as rayon, polyester, and pulp fibers. In the spunlace processing section 40, the kneaded pulp raw material is jetted with a jet of water jet through the spunbond nonwoven fabric layers 10A, 20A, and 30A, and the fibers are entangled with each other.

  The spunbond nonwoven fabric layer 40A in which the three spunbond nonwoven fabric layers 10A, 20A, and 30A are stacked is composed of an embossed convex roller 61 and a specific curvature surface on which a convex portion 65 is partially formed on the peripheral surface formed for emboss formation. Embossing between the embossing smooth roller 62 and the embossing pattern of the embossing roller 60 for overall heating and the embossing convex roller 61 that forms a uniform peripheral surface made of a cylinder of a predetermined diameter, is embossed to fuse all layers by thermal fusion. To do. At this time, the X-axis component orthogonal to the transfer direction Y of the spunbond nonwoven fabric layers 10A, 20A, and 30A and the Y-axis component orthogonal to the X-axis component are determined by the rotation axes of various rollers.

  The entire embossing roller 60 from the embossed convex roller 61 formed with the convex portion 65 to be embossed by the heat roller and the embossed smooth roller 62 having a specific curvature surface has the width Xa, Y axis of the heat-sealed portion in the X-axis component direction. The embossed pattern of the convex portion 65 shown in FIGS. 3 to 5 is partially heated by the width Ya of the heat-sealed portion in the component direction, and is wound up as a spunbonded nonwoven fabric roll 70.

The length Ya of the heat-sealed portion in the Y-axis component direction and the length Yb of the portion not heat-fused in the Y-axis component direction are on a straight line in the Y-axis component direction. Further, the length Ya of the heat-sealed portion in the Y-axis component direction and the length Yb of the portion not heat-fused in the Y-axis component direction extend in the Y-axis direction.
In addition, both sides of the position 1/2 of the length Ya of the heat-sealed portion in the Y-axis component direction are the length Yb of the portion not heat-sealed, and the direction of the Y-axis component of the length Yb of the portion not heat-fused Are set to the length Ya of the heat-sealed portion.
Both sides of the 1/2 position in the Y-axis component direction of the length Ya of the heat-sealed portion are the length Yb of the portion that is not heat-sealed, and 1 / of the length Yb of the portion that is not heat-fused in the Y-axis component direction. Both sides of the two positions are at 1/2 positions of the length Ya of the portion to be heat-sealed. When practicing the present invention, both sides of the half-position in the Y-axis component direction of the length Ya of the heat-sealed portion are the length Yb of the portion that is not thermally fused, and the length Yb of the portion that is not thermally fused. Both sides of the half position in the Y-axis component direction may be any one of the length Ya of the portion to be heat-sealed.

1/2 position in the Y-axis component direction of the length Yb of the portion not heat-sealed, 1/2 position in the Y-axis component direction of the length Ya of the heat-sealed portion, length Yb of the portion not heat-sealed The position of ½ in the Y-axis component direction does not specify exactly ½, and may be in the range of 1/5 to 4/5. This 1/2 is a desirable value among these intermediate values.
That is, the width Xb of the part that is not fused is continuously formed in the Y-axis component direction of the Y-axis component direction. Further, the length Yb of the portion not heat-sealed in the Y-axis component direction is an area where the area Xb · Yb with the width Xb of the portion not heat-fused in the X-axis component direction is not stamped. The areas Xa and Yb are the convex portions 65 of the embossing roller 60 for embossing.
Here, the ratio of Xb / Xa can be used as an index of bulk processing and mechanical strength. In particular, the width Xb of the portion where the ratio of Xb / Xa is not fused is also an index of sliding resistance when sliding.

Accordingly, when tension is applied in the X-axis component direction to the width Xa of the heat-sealed portion in the X-axis component direction and the width Xb of the non-heat-bonded portion in the X-axis component direction, the width Xb of the non-heat-welded portion and the length of the non-heat-fused portion. The external force is applied to the height Yb, and the pulling force becomes the weakest. However, the external force applied in the other oblique angle or Y-axis component direction is dispersed by the area Xa / Yb with the width Xa of the embossed portion and becomes the external force. It has a structure to withstand.
Therefore, it is partially heated and heat-sealed and embossed by the width Xa of the heat-sealed portion in the X-axis component direction and the width Ya of the heat-welded portion in the Y-axis component direction.

3 and 4, a heat-sealed portion having a width Xa and a length Ya is repeatedly formed around the embossing roller 60. However, when an external force is applied in the X-axis component direction, the external force is directly applied. Is added to the width Xb of the portion that is not heat-sealed.
Therefore, both when dry and when wet, both ends of the width Yb of the portion not heat-sealed in the Y-axis component direction are within both ends shorter than the length Ya of the adjacent heat-sealed portion. Since no external force is applied to both ends of the length Ya of the heat-sealed portion, it is soft even when the product is used, and a bulky process that is strong and does not stretch vertically or shrink even when overlapped can be performed. In addition, since both ends of the width Yb of the portion not heat-sealed in the Y-axis component direction are within both ends of the length Ya of the adjacent heat-sealed portion, the fibers do not fall off even if they are soft, and overlapped No vertical (Y-axis component direction) elongation occurs. Moreover, it becomes a bulky process with a strong waist which does not shrink laterally (X-axis component direction).

  Further, if the fusion-bonded portion to be heat-welded is a shape symmetrical with respect to the X-axis component direction and the Y-axis component direction that interfere with each other, such as the “H” shape shown in FIG. Regardless of whether the fused part is dry or wet, it has good heat fusion processability and can be formed with three layers of spunbond nonwoven fabric layers 10A, 20A, and 30A. , Do not stretch vertically or shrink. Moreover, it can be set as the composite structure which is strong and can form bulky processing and mechanical strength arbitrarily.

The width Xc of the convex portion 65 heat-sealed by embossing is configured such that the unit graphic shown in FIG. 5 cannot expand and contract in the X-axis component direction and the Y-axis component direction, respectively, such as an “H” shape. The amount of the spunbond nonwoven fabric layers 10A, 20A, 30A changing in the planar direction is small, and the bulk in the thickness direction perpendicular to the plane can be increased.
The amount “H” of the unit graphic shown in FIG. 5 changes in the direction of all planes. However, the unit graphic “I” shown in FIG. 3 and FIG. 4 is less likely to change in the planar direction, but it is more likely that lateral expansion occurs only in the X-axis component direction.
Therefore, by changing the dimensions of the heat fusion length Ya, the width Yb of the non-heat fusion portion, the heat fusion length Xa, and the width Xb of the non-heat fusion portion, the X axis of the width Xc of the fusion portion is changed. The elongation when an external force is applied in the component direction can be set arbitrarily.
That is, the width of the fusion part is connected to both sides of the half position in the Y-axis component direction of the length Ya of the thermal fusion part by the width Xc of the thermal fusion part parallel to the X-axis component direction.

Thereafter, the spunbond nonwoven fabric layers 10A, 20A, and 30A are laminated and integrated, and then dried, and then the embossed convex roller 61 that forms the peripheral surface formed for embossing and the embossed smooth that forms the uniform peripheral surface X-axis component perpendicular to the transfer direction Y of the spunbonded nonwoven fabric layers 10A, 20A, and 30A when the pressure between the rollers 62 is applied and all layers are fused by thermal fusion, the length of thermal fusion The Y-axis component orthogonal to the Ya and X-axis components is determined by the rotation of various rollers.
The embossing roller 60 for forming embossing is the same as that shown in FIGS.
[Embodiment 2]

The composite structure of the second embodiment shown in FIG. 2 is obtained by replacing the first spunbond nonwoven fabric manufacturing machine 20 of the first embodiment shown in FIG.
The melt blown nonwoven fabric manufacturing machine 100 pushes the molten polymer out of the nozzle with hot compressed air, extrudes with high-speed hot air, microfibers, forms a self-adhesive web, and blows it onto the net conveyor. The sheet-like nonwoven fabric is obtained by sucking and exhausting the air. In particular, the melt blown nonwoven fabric manufacturing machine 100 is formed as a microfilter having a fiber size of φ1 μm to 15 μm.

A melt blown nonwoven fabric manufacturing machine 100 as a composite structure according to Embodiment 2 includes a hopper 101 that supplies pellets of raw materials, an extruder 102 that melts the raw materials supplied to hoppers 101 and extrudes molten pellets, and an extruder While the molten resin extruded from 102 is blown from the nozzle 103 as a continuous long fiber, high-temperature and high-pressure hot air from the compressor is jetted, the web is collected as a continuous long fiber, sucked by the net conveyor 105, and sprayed onto the upper surface of the net conveyor 105 Is done.
The net conveyor 105 is provided with a suction portion 106 that sucks air inside, and is sucked downward by a compressor 107 disposed outside. Therefore, the melt blown nonwoven fabric manufacturing machine 100 is formed on the upper surface of the net conveyor 105.

 The nonwoven fabric manufactured by the melt blown nonwoven fabric manufacturing machine 100 can produce a nonwoven fabric that exhibits polymer color, hydrophilicity, and water repellency. Since it can be composed of ultrafine fibers, it has a fine structure, and various characteristics can be adjusted by controlling the average fiber diameter. Further, various sheets can be laminated from the positions of the spunbond nonwoven fabric layers 10A and 30A and their thicknesses, and a composite sheet exhibiting the respective performances can be made. It is used in products such as various filters, industrial masks, and wiping cloths.

The melt blown nonwoven fabric manufacturing machine 100 as a composite structure according to the second embodiment is formed by embossing with the spunbond nonwoven fabric layers 10A and 30A so as to form embossed protrusions composed of circumferential protrusions 65 formed for embossing as three layers. The embossed smooth roller 62 composed of the partial roller 61 and the specific curvature surface is embossed to fuse all layers by heat fusion. At this time, the X-axis component orthogonal to the transfer direction Y of the spunbond nonwoven fabric layers 10A and 30A and the Y-axis component orthogonal to the X-axis component are determined by the rotation of various rollers.
The embossed convex roller 61 to be embossed and the embossed smooth roller 62 having a predetermined circumference are partially divided by the width Xa of the heat-sealed portion in the X-axis component direction and the width Ya of the heat-welded portion in the Y-axis component direction. A convex portion 65 is formed that is heated by the heat.

As in the first embodiment, when tension is applied in the X-axis component direction to the width Xa of the heat-sealed portion in the X-axis component direction and the width Xb of the non-heat-fused portion, the width Xb and heat An external force is applied to the length Yb of the part that is not fused, and the tensile force becomes the weakest in the X-axis component direction. However, the external force applied in the other oblique angle or Y-axis component direction depends on the width Xa of the part to be embossed The structure is distributed over the areas Xa and Yb to withstand external forces.
Therefore, a fusion part to be thermally fused by partial embossing is formed by the width Xa of the thermal fusion part in the X-axis component direction and the width Ya of the thermal fusion part in the Y-axis component direction. Yes.

Therefore, as shown in FIGS. 3 and 4, a heat-sealed portion having a width Xa and a length Ya is formed around the embossing roller 60, but when an external force is applied in the X-axis component direction, An external force is applied to the width Xb of the portion that is not thermally fused.
Therefore, if the convex portion 65 heat-sealed by embossing has a shape symmetrical with respect to the X-axis component direction and the Y-axis component direction that interfere with each other, such as the “H” shape shown in FIG. Regardless of drying or wetting, the heat-sealed portion has good heat-sealing processability and can be formed with three layers of spunbond nonwoven fabric layers 10A, 100A, and 30A. It can be made into a composite structure that does not fall off and has a strong waist that does not stretch vertically or shrink, and can be arbitrarily formed with bulky processing and mechanical strength.

The composite structure according to the second embodiment is extruded by the extruders 12 and 32 and the extruder 102 and continuously ejected from the nozzles 13 and 33 and the nozzle 103 to form a long fiber fiber web. Nylon, rayon, polyester, A raw material kneaded with one or more short fibers of fibers such as polypropylene and pulp and water is sprayed, and the spunbond nonwoven fabric layers 10A and 30A and the melt blown nonwoven fabric layer 100A are laminated and entangled.
When three layers of the spunbond nonwoven fabric layers 10A and 30A and the melt blown nonwoven fabric layer 100A are overlapped and all layers are fused by thermal fusion, the spunbond nonwoven fabric layers 10A and 30A and the melt blown nonwoven fabric layer 100A are orthogonal to the transfer direction X The X-axis component and the Y-axis component orthogonal to the X-axis component are in the range of Xa <Xb when the width Xa of the heat-sealed portion in the X-axis component direction and the width Xb of the non-fused portion are set. .

  At this time, as in the first embodiment, the length Ya of the heat-sealed portion in the Y-axis component direction and the length Yb of the portion not heat-fused in the Y-axis component direction are on a straight line in the Y-axis component direction. Both sides of the 1/2 position in the Y-axis component direction of the length Ya of the heat-sealed portion are the length Yb of the portion that is not heat-fused, and Y of the length Yb of the portion that is not heat-fused Both sides of the ½ position in the axial component direction are embossed by an embossed convex roller 61 and an embossed smooth roller 62 formed with a convex portion 65 set to the length Ya of the heat-sealed portion.

Here, the spunbonded nonwoven fabric layers 10A, 20A, and 30A that are fused by overlapping two or more layers are the spunbonded nonwoven fabric layers directly when only the spunbonded nonwoven fabric layers 10A, 20A, and 30A are used. 10A, 30A and the melt blown nonwoven fabric layer 100A may be overlapped, or the melt blown nonwoven fabric layer 100A may be formed by laminating the melt blown nonwoven fabric layer 100A before the spunbond nonwoven fabric layers 10A, 30A. Either of the layers 10A and 30A may be used.
That is, as long as it has the spunbond nonwoven fabric layer which fuses | stacks two or more layers, it may have another nonwoven fabric layer and a synthetic resin layer. As a result, the spunbonded nonwoven fabric layers 10A, 20A, and 30A that overlap and fuse two or more layers only need to form a plurality of layers, and the meltblown nonwoven fabric layer 100A can form one or more nonwoven fabric layers. Good.

Therefore, the X-axis component orthogonal to the transport direction of the spunbond nonwoven fabric layers 10A, 20A, and 30A, and the Y-axis component orthogonal to the X-axis component are the width Xa of the heat fusion portion in the X-axis component direction, When the width Xb of the non-fused portion is set, the range is Xa <Xb.
Further, the length Ya of the heat-sealed portion in the Y-axis component direction and the length Yb of the portion not heat-fused in the Y-axis component direction are the width Xa of the heat-fused portion and the length Ya of the heat-fused portion. In the arrangement on the straight line adjacent to the adjacent Y-axis component direction, the length of the heat-bonded portion length Ya on both sides of the 1/2 position in the Y-axis component direction is the length of the portion that is not heat-sealed. The length Yb and the length Yb of the non-heat-sealed portion of the Y-axis component direction at both sides of the half position are set to the length Ya of the heat-sealed portion, and the embossed convex roller 61 and the embossed smooth roller 62 Embossed.

  Then, after moisture is dried, the spunbonded nonwoven fabric layers 10A and 30A and the melt blown nonwoven fabric layer 100A are fused by special embossing shown in FIGS. As a result, the fibers are prevented from falling off and the processing suitability is improved, and the longitudinal elongation is suppressed. Moreover, it can be finished in a pattern similar to the mesh pattern of a conventional spunbond nonwoven fabric with a special emboss pattern. However, the portion that appears to be an embossed pattern is not necessarily perforated, and the portion of the polypropylene (PP) fiber of the base material is merely bonded by heat and looks transparent, so that lateral elongation can also be suppressed. Since dirt that has been wiped off does not pass through the back surface, dirt does not adhere to the hands.

  According to the composite structures of the first and second embodiments, the spunbond nonwoven fabric layers 10A, 20A, 30A, or the spunbond nonwoven fabric layers 10A, 30A and the melt blown nonwoven fabric layer 100A are restrained in the longitudinal direction while being stretchable in the transverse direction. When it is used as a base material that has been processed to give it, the strength is weak when wet, and it is easy to tear, and it becomes hard even when wet. And the problem that paper powder came out or the fiber part peeled off from the base material when wet was able to be solved. Good results were obtained by applying the same processing to the thermal bond nonwoven fabric.

  The composite structure manufacturing apparatus according to the present embodiment is extruded by extruders 102, 22, and 32 and continuously ejected from nozzles 103, 23, and 33 to form a long fiber fiber web. Nylon, rayon, polyester, A manufacturing process of the spunbond nonwoven fabric layers 10A and 30A and the meltblown nonwoven fabric layer 100A formed by superimposing two or more layers of any one or more fibers such as polypropylene and pulp, or the meltblown nonwoven fabric layer 100A and the spunbond nonwoven fabric layer 20A. , 30A in the manufacturing process, when three layers are overlapped and all layers are fused by thermal fusion, the X-axis component orthogonal to the transport direction of the melt blown nonwoven fabric layer 100A and the spunbond nonwoven fabric layers 20A, 30A, the X-axis component The Y-axis component orthogonal to the width is the width Xa of the heat-sealed portion in the X-axis component direction, the portion that is not fused When the width Xb is set, the range is Xa <Xb, and the length Ya of the heat-sealed portion in the Y-axis component direction and the length Yb of the portion not heat-fused in the Y-axis component direction are the Y-axis component. The two sides of the position Y / 2 in the direction of the Y-axis component of the length Ya of the heat-sealed portion are the length Yb of the portion that is not heat-fused, and the length of the portion that is not heat-fused Both sides of the 1/2 position in the Y-axis component direction of the length Yb are embossed to the length Ya of the heat-sealed portion.

When the melt-blown nonwoven fabric layer 100A and the spunbond nonwoven fabric layers 10A, 30A formed by superimposing three layers are fused together by thermal fusion, the composite structure of the present embodiment has a meltblown nonwoven fabric layer 100A and a spunbond nonwoven fabric layer 10A, When the X-axis component orthogonal to the transfer direction of 30A and the Y-axis component orthogonal to the X-axis component are the width Xa of the heat-sealed portion in the X-axis component direction and the width Xb of the non-fused portion, The range is Xa <Xb.
Further, the length Ya of the heat-sealed portion in the Y-axis component direction and the length Yb of the portion not heat-fused in the Y-axis component direction are arranged on a straight line in the Y-axis component direction. Both sides of the 1/2 position of the length Ya of the Y-axis component direction are the length Yb of the portion that is not thermally fused, and both sides of the 1/2 position of the length Yb of the portion that is not thermally fused is the Y-axis component direction Is set to the length Ya of the heat-sealed portion, and embossing is performed by the embossed convex roller 61 and the embossed smooth roller 62 in which the surfaces of the width Xa of the heat-fused portion and the length Ya of the heat-fused portion are heat-sealed. Is what you do.

Therefore, the melt blown nonwoven fabric layer 100A and the spunbond nonwoven fabric layers 10A and 30A formed by superposing two or more layers can have an arbitrary bulky thickness on the soft object or the human body side. A melt blown nonwoven fabric layer or the like can be incorporated as required.
When melt blown nonwoven fabric layer 100A and spunbond nonwoven fabric layers 10A and 30A are overlapped and all layers are fused by thermal fusion, first, the X-axis component perpendicular to the transport direction of the spunbond nonwoven fabric layer, the X The Y-axis component orthogonal to the axial component is defined as Xa <Xb, where the width Xa of the heat-sealed portion in the X-axis component direction and the width Xb of the non-fused portion are set, and the width Xa of the heat-welded portion is It is narrower than the width Xb of the non-fused part.

  The length Ya of the heat-sealed portion in the Y-axis component direction and the length Yb of the portion not heat-fused in the Y-axis component direction are the length Ya of the heat-sealed portion on a straight line in the Y-axis component direction and The length Yb of the part that is not heat-sealed is arranged, the length Yb of the part that is not heat-sealed on both sides in the Y-axis component direction of the length Ya of the heat-welded part, and not heat-sealed The both sides of the position Y / 2 in the Y-axis component direction of the portion length Yb are set to the length Ya of the heat fusion portion, and the surface of the heat fusion portion width Xa and the heat fusion portion length Ya is heated. Since the fusion embossing is performed, not only the X-axis component direction and the Y-axis component direction, but also the slack that does not cause longitudinal stretching or lateral contraction is strong against an oblique external force. In particular, embossing is performed by an embossing roller 60 including an embossed convex roller 61 and an embossed smooth roller 62 formed with a convex portion 65 by heat-sealing the surfaces of the heat-sealed portion width Xa and the heat-sealed portion length Ya. Since it is performed, the longitudinal stretch and the lateral shrinkage counteract as internal strains, so that the overall resistance to the longitudinal stretch and lateral shrinkage is strong and the shape does not change.

Further, the length Ya of the heat-sealed portion in the Y-axis component direction and the length Yb of the non-heat-bonded portion in the Y-axis component direction can be processed and are soft and fiber when the product is used (wet). In addition, there is no dropout of the product, and there is a strong waist that does not cause longitudinal stretch or lateral shrinkage, so that bulky processing and mechanical strength can be arbitrarily formed.
In addition, it has good processability even when dry or wet, is soft when used and does not drop off fibers, etc. Can be provided as desired.

In the first embodiment or the second embodiment, two or more spunbond nonwoven fabric layers 10A, 20A, 30A are overlapped. However, when the present invention is implemented, the first embodiment of the first embodiment shown in FIG. Although the problem is where the 1-spunbond nonwoven fabric manufacturing machine 10 is arranged, the number of melt blown nonwoven fabric manufacturing machines 100 is not a direct problem.
Moreover, in the said embodiment, the spunbond nonwoven fabric manufacturing machines 10 and 30 and the melt blown nonwoven fabric manufacturing machine 100 carry out embossing with the embossing roller 60 by the embossing convex roller 61 and the embossing smooth roller 62 which formed the convex part 65 after that. Is going.

  In the embossing process of the present invention, the transport direction of the spunbond nonwoven fabric layers 10A, 20A, and 30A, that is, the X-axis component orthogonal to the Y-axis component is long in the Y-axis component direction, and heat fusion in the X-axis component direction When the width Xa of the part and the width Xb of the part not fused are in the range of Xa <Xb, the length Ya of the heat-sealed part in the Y-axis component direction and the part not heat-fused in the Y-axis component direction The length Yb is a straight line arrangement in the direction of the Y-axis component, and the length Yb of the portion that is not thermally fused on both sides of the half-position of the length Ya of the heat-welded portion in the Y-axis component direction. In addition, both sides of the half position in the Y-axis component direction of the length Yb of the portion that is not thermally fused are set to the length Ya of the thermally fused portion.

DESCRIPTION OF SYMBOLS 10 1st spunbond nonwoven fabric manufacturing machine 20 2nd spunbond nonwoven fabric manufacturing machine 30 3rd spunbond nonwoven fabric manufacturing machine 10A, 20A, 30A Spunbond nonwoven fabric layers 11, 21, 31 Extruders 13, 22, 32 Extruders 13, 23, 33 Nozzle 15, 25, 35 Net conveyor 16, 26, 36 Suction unit 60 Emboss roller 61 Emboss convex roller 62 Emboss smooth roller 100A Melt blow nonwoven fabric layer 100 Melt blow nonwoven fabric production machine 101 Hopper 102 Extruder 103 Nozzle 105 Net conveyor 107 Compressor

Claims (3)

When extruding with an extruder and continuously ejecting from a nozzle to form a fiber web of long fibers, two or more spunbond nonwoven layers are stacked and all layers are fused by thermal fusion, in the direction of transport of the spunbond nonwoven layers. The X-axis component orthogonal to the Y-axis component orthogonal to the X-axis component is
When the width Xa of the heat fusion portion in the X-axis component direction and the width Xb of the non-fused portion are Xa <Xb,
Further, the length Ya of the heat-sealed portion in the Y-axis component direction and the length Yb of the portion not heat-fused in the Y-axis component direction are arranged on a straight line in the Y-axis component direction,
Both sides of the 1/2 position in the Y-axis component direction of the length Ya of the heat-sealed portion are the length Yb of the portion not heat-sealed, and the Y of the length Yb of the portion not heat-sealed A composite structure characterized in that both sides of the half position in the axial component direction are provided with embossing set to the length Ya of the heat-sealed portion.   The both sides of the 1/2 position of the length Ya of the heat-sealed portion in the Y-axis component direction are connected by the width of the heat-fused portion parallel to the X-axis component direction. 2. The composite structure according to 1. When extruding with an extruder and continuously ejecting from a nozzle to form a fiber web of long fibers, two or more spunbond nonwoven layers are stacked and all layers are fused by thermal fusion, in the direction of transport of the spunbond nonwoven layers. The X-axis component orthogonal to the Y-axis component orthogonal to the X-axis component is
When the width Xa of the heat fusion portion in the X-axis component direction and the width Xb of the non-fused portion are Xa <Xb,
Further, the length Ya of the heat-sealed portion in the Y-axis component direction and the length Yb of the portion not heat-fused in the Y-axis component direction are arranged on a straight line in the Y-axis component direction,
Both sides of the 1/2 position in the Y-axis component direction of the length Ya of the heat-sealed portion are the length Yb of the portion not heat-sealed, and the Y of the length Yb of the portion not heat-sealed An apparatus for manufacturing a composite structure, characterized in that both sides of a half position in the axial component direction are provided with embossing set to the length Ya of the heat-sealed portion.

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