JPH07227314A - Hiking sheet - Google Patents

Abstract

PURPOSE:To provide a hiking sheet which enables the enhancing of mechanical property, dimensional stability, water absorptivity, soft touch on skin and flexibility greatly. CONSTITUTION:This hiking sheet has a synthetic fiber unwoven web layer 2 laminated a cotton short fiber unwoven web layer 1. In the cotton short fiber unwoven web layer 1, component fibers are confounded three-dimensionally and in the synthetic fiber unwoven web layer 2, the component fibers are fused thermally or confounded three-dimensionally in part.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vacationing sheet rich in mechanical properties, dimensional stability, water absorption, soft touch and flexibility.

[0002]

2. Description of the Related Art Conventionally, as a vacation sheet, a laminated sheet in which a spunbonded nonwoven fabric and a film, a spunbonded nonwoven fabric and a spunbonded nonwoven fabric, and a vinyl and a spunbonded nonwoven fabric are heat pressed is used. Therefore, since this laminated sheet is mainly composed of synthetic resin and is composited by being subjected to heat pressure contact to form a vacation sheet, the sheet surface has a rough feeling, a bad texture, and a hard texture. It has drawbacks. In addition, since the synthetic fiber, which is a material of the spunbonded nonwoven fabric, has poor water absorbency, the nonwoven fabric adheres to the skin when used in summer and the like, which causes a problem of impairing comfort.

[0003]

SUMMARY OF THE INVENTION The present invention has been made to solve the above problems, and provides a vacationing seat rich in mechanical properties, dimensional stability, water absorption, soft touch and flexibility. The purpose is.

[0004]

In order to solve this problem, the present invention is a vacation sheet comprising a cotton short fiber nonwoven web layer A laminated on a synthetic fiber nonwoven web layer B,
The cotton short fiber non-woven web layer A is characterized in that constituent fibers are three-dimensionally entangled, and the synthetic fiber non-woven web layer B is partially heat-sealed or three-dimensionally entangled. The theme is a travel sheet.

The vacation seat of the present invention will be described in more detail. FIG. 1 is a perspective view of an essential part for explaining a vacation sheet of the present invention, in which 1 is a cotton short fiber nonwoven web layer A, 2 is a synthetic fiber nonwoven web layer B, and these web layers A are shown. , B are laminated to the side of the synthetic fiber non-woven web layer B side, and ultrasonic welder processing is applied along the folded-back portion 3 to be edged. Reference numeral 4 is a processing unit using an ultrasonic welder. In addition, a sheet obtained by laminating the web layers A and B is partially subjected to an ultrasonic welder treatment so that both web layers A and B are
Are integrated. Reference numeral 5 is a processing unit using an ultrasonic welder.

The first feature of the vacation sheet of the present invention is to use cotton as a constituent fiber in the short fiber non-woven web layer A,
This is to use a so-called spunlaced nonwoven fabric in which fibers constituting the short fiber nonwoven web layer A are three-dimensionally entangled with each other. By using a spunlaced nonwoven fabric of cotton fibers for the short fiber non-woven web layer A, a highly flexible surface layer having water absorbency and a soft touch feeling is formed.

In the present invention, the three-dimensional entanglement means a structure in which the fibers forming the short fiber non-woven web layer A are entangled not only in the lateral direction but also in the thickness direction, and are closely integrated. It means having. Further, the densely integrated structure means that the short fibers are mainly entangled with each other, and the bulk density is higher than that of the carded short fiber web. As a method for producing the short fiber non-woven web layer A having a three-dimensional entanglement,
Although there are a needle punch method and a spunlace method, the spunlace method is effective in the present invention.

The step of producing the short fiber non-woven web layer A having three-dimensional entanglement by the spunlace method will be described in detail. The number of injection holes having a hole diameter of 0.05 to 1.5 mm is 0.5.
A plurality of orifice heads arranged in one row or a plurality of rows at intervals of ˜5 mm collide a high-pressure liquid stream ejected in a columnar shape at a high pressure with a short fiber nonwoven web placed on a porous support plate, The fibers constituting the short fiber non-woven web are closely entangled and integrated. As the liquid, room temperature water or hot water can be used. When the high-pressure liquid stream is collided with the short-fiber nonwoven web, the orifice head in which the injection holes are arranged, with respect to the traveling direction of the short-fiber non-woven web mounted on the porous support plate, It is advisable to oscillate the orifice head at the same intervals as the injection hole intervals in the direction perpendicular to each other, and to eject the high-pressure liquid flow so as to make it uniformly collide.

When the high-pressure liquid stream is jetted, the porous support plate on which the short-fiber nonwoven web is placed has such a structure that the high-pressure liquid flow can pass through the short-fiber nonwoven web on the porous support plate. As long as it is made of metal, polyester, or any other material.

The mesh of the porous support plate used in the present invention is in the range of 30 to 150 lines / 25 mm, more preferably in the range of 50 to 100 lines / 25 mm. When the mesh size is less than 30/25 mm, after the high-pressure liquid flow collides with the short fiber non-woven web, a clear hole shape is provided through the short fiber non-woven web, so when processed into a vacation sheet, When sitting with bare feet, the surface feels rough and a soft feeling cannot be obtained, which is not preferable. Also, the mesh is 20
If the number exceeds 0/25 mm, the amount of energy required for the high-pressure liquid stream to pass through the laminated portion of the short fiber nonwoven web and the porous support plate becomes large, which is not preferable in terms of production cost.

The entanglement treatment with the high-pressure liquid flow may be performed at least twice. That is, in the first confounding treatment with the high-pressure liquid flow, the water pressure is 40 kg / cm.
Pre-entangle the short fiber nonwoven web with a high pressure liquid stream of ² G or less. If the water pressure at the time of performing the first entanglement treatment exceeds 40 kg / cm ² G, turbulence of the short fiber non-woven web occurs due to the accompanying air flow generated by the high-pressure liquid flow, resulting in uneven weight and uneven quality of the nonwoven fabric. Not preferable for keeping. The short-fiber non-woven web that has been pre-entangled continues to have a hydraulic pressure of 50 kg /
A so-called spunlaced nonwoven fabric can be obtained in which short fibers are three-dimensionally and densely integrated by being treated with a high-pressure liquid flow of cm ² G or more.

[0012] Further, by the basis weight of the short fiber non-woven web,
The short-fiber non-woven web obtained by the above method is further inverted, and as the third entanglement treatment, the entanglement treatment is performed by the hydraulic pressure applied in the second time to obtain a spunlace nonwoven fabric in which the front and back sides are densely entangled. be able to.

Excess moisture of the short fiber non-woven web obtained as described above is removed by a known moisture removing device such as mangle, and further subjected to a drying treatment using a suction band hot air circulating dryer, A non-woven fabric having a three-dimensional entanglement is obtained.

The short fiber non-woven web A in the present invention uses cotton as a constituent. The web layer A preferably has a basis weight of 10 to 100 g / m ² . When the basis weight is less than 10 g / m ² , the shape retention of the obtained web layer A is not improved, while when the basis weight exceeds 100 g / m ² , the three-dimensional entanglement of the constituent fibers of the web layer A is sufficient. However, neither is preferable.

As the cotton, combed yarn, bleached cotton or the like is used, and it is preferable to use a cotton having a fineness of 1.0 to 2.5 denier and a fiber length of about 10 to 40 mm. In addition, the web layer A made of cotton fibers as referred to in the present invention is made of fluff obtained from cotton yarn, woven fabric or knitted fabric. The fluff is simply stranded, exposed to fluorescence, and dyed.

The anti-pile machine which can be effectively used in the present invention is a rag machine, a knot breaker, a garnet machine, a slicing machine and the like. The type and combination of the anti-fluffing machines used depend on the shape of the fabric to be fluffed, the thickness of the constituent yarns, and the twisting strength, but several identical anti-fluffing machines can be connected in series or two or more types can be used. It is effective to use a combination of anti-hairbrushing machines. Here, the defibration rate by the anti-pulling machine is 30
The range of ˜95% is preferable. When the defibration rate is less than 30%, the liquid flow does not sufficiently penetrate the web layer A when the web layer A is treated with the high-pressure liquid flow, and when the defibration rate exceeds 95%, sufficient surface abrasion strength is obtained. I can't. The defibration rate is obtained by the formula shown below.

Disentanglement ratio (%) = (weight of fluff-weight of filamentous material) × 100 / weight of fluff The second feature of the vacation sheet of the present invention is that the synthetic fiber non-woven web layer B has no short cotton fibers. Laminating a woven web layer A. By using the synthetic fiber non-woven web layer B on the side in contact with the ground or the floor, the effect is obtained in that the moisture of the ground or the floor is not transmitted to the surface and the strength of the recreation sheet is maintained. The fibers constituting the synthetic fiber non-woven web layer B in the present invention are made of a fiber-forming polyolefin-based polymer, polyester-based polymer or polyamide-based polymer.

The polyolefin polymer is an aliphatic α-monoolefin having 2 to 18 carbon atoms, such as ethylene, propylene, butene-1, pentene-1,3-methylbutene-1, hexene-1, octene-1. , A homopolyolefin polymer composed of dodecene-1 and octadecene-1. This aliphatic α-monoolefin is a derivative of other ethylenically unsaturated monomers such as butadiene,
It may be a polyolefin copolymer obtained by copolymerizing similar ethylenically unsaturated monomers such as isoprene, pentadiene-1,3, styrene and α-methylstyrene. In the case of a polyethylene-based polymer, propylene, butene-1, hexene-1, octene-1 or a similar higher α-olefin is 10% by weight with respect to ethylene.
The following may be copolymerized, and in the case of a polypropylene polymer, ethylene or a similar higher α-olefin may be copolymerized with propylene in an amount of 10% by weight or less, When the copolymerization rate of these copolymers exceeds the above-mentioned weight%, the melting point of the copolymer decreases, and a composite nonwoven fabric obtained by using a nonwoven web composed of fibers of these copolymers is used under high temperature conditions. If so, mechanical properties and dimensional stability are deteriorated, which is not preferable.

As the polyester polymer, an aromatic dicarboxylic acid such as terephthalic acid, isophthalic acid, naphthalene-2,6-dicarboxylic acid or an aliphatic dicarboxylic acid such as adipic acid or sebacic acid or an ester thereof is used as an acid component. And a homopolyester polymer or copolymer containing a diol compound such as ethylene glycol, diethylene glycol, 1.4-butadiol, neopentyl glycol, or cyclohexane-1-4-dimethanol as an ester component. In addition, these polyester polymers include paraoxybenzoic acid, 5
-Sodium sulfoisophthalic acid, polyalkylene glycol, pentaerythritol, bisphenol A and the like may be added or copolymerized.

Polyamide polymers include polyimino-1-oxotetramethylene (nylon 4), polytetramethylene adipamide (nylon 46), polycapramide (nylon 6), polyhexamethylene adipamide (nylon 66), Polyundecanamid (nylon 11),
Examples thereof include polylaurolactamide (nylon 12), polymethaxylene adipamide, polyparaxylylene decanamide, polybiscyclohexylmethane decanamide, or a polyamide-based copolymer having a monomer of these as a constituent unit. Particularly, in the case of polytetramethylene adipamide, polytetramethylene adipamide is obtained by copolymerizing other polyamide components such as polycapramide, polyhexamethylene adipamide and polyundecamethylene terephthalamide in an amount of 30 mol% or less. It may be a tetramethylene adipamide-based copolymer. The copolymerization rate of the other polyamide component is 30.
When the content exceeds mol%, the melting point of the copolymer decreases, and the mechanical properties and dimensional stability of the composite non-woven fabric obtained by using a nonwoven web made of fibers of these copolymers are high when used under high temperature conditions. It is not preferable because it decreases.

In the present invention, the above-mentioned fiber-forming thermoplastic polymer may be added, if necessary, to a matting agent,
Various additives such as pigments, flame retardants, deodorants, light stabilizers, heat stabilizers and antioxidants can be added within a range that does not impair the effects of the present invention.

The fibers constituting the synthetic fiber non-woven web layer B in the present invention are composed of the above-mentioned polymer having a fiber-forming property, and the form thereof is in addition to the above-mentioned polymer alone. It may be a blended product in which two or more different polymers selected from the above polymers are blended within a range that does not impair the melt spinnability. Examples of this blend include a blend of a polyester polymer and a polyolefin polymer, and a blend of two different polyamide polymers. In the former case, the shrinkage of the non-oriented polyester component can be suppressed immediately after melt spinning, which is particularly preferable. Further, the morphology of this fiber may be one in which two different polymers selected from the above polymers are arranged in a core-sheath type or a parallel type. In this composite, for example, a core-sheath type in which a polyethylene terephthalate polymer is arranged in the core part, and a polyethylene polymer is arranged in the sheath part,
Alternatively, a composite form such as a parallel type composed of a polycapramide polymer and a polyhexamethylene adipamide polymer may be mentioned.

The fibers constituting the synthetic fiber non-woven web layer B in the present invention are composed of the above-mentioned polymer having a fiber-forming property and have a single fiber fineness of 1.5 to 8.0 denier. When the monofilament fineness is less than 1.5 denier, the mechanical properties of the obtained web layer B are deteriorated, and the spinnability is deteriorated in the melt spinning step, while the monofilament fineness is 8.
When it exceeds 0 denier, the texture of the obtained web layer B becomes hard and a composite nonwoven fabric having a high flexibility cannot be obtained.
Neither is preferable. Therefore, in the present invention, the single fiber fineness is 1.5 to 8.0 denier, preferably 2.0 to
It should be 5.0 denier.

Synthetic fiber non-woven web layer B in the present invention
In addition to the non-woven web composed of the above-mentioned fibers and thermally bonded between the constituent fibers, a non-woven web having three-dimensional entanglement can be used.

That is, when the synthetic fiber non-woven web layer B is composed of long fibers, it is partially heat-bonded, and when it is composed of short fibers, it is three-dimensionally formed by heat bonding or the spunlace method. It is entangled.

Typical non-woven fabrics of the synthetic fiber non-woven web used for the web layer B in the present invention are spunbonded non-woven fabrics made of synthetic long fibers and heat-embossed short-fiber non-woven fabrics made of synthetic short fibers. is there.

Explaining the spunbond nonwoven fabric,
A single or a plurality of the thermoplastic polymers are melt spun using a mold, after cooling the spun polymer stream, it is taken up by air sucker, etc., the yarn is opened by corona discharge, and then the conveyor is moved. After being collected and deposited on the top, it is partially heat-bonded to form a non-woven fabric.

In the present invention, the term "partial heat bonding" means the addition
A roll that is heated and has an engraved pattern engraved on its surface
Between the sroll and a heated metal roll with a smooth surface
By passing the synthetic long-fiber nonwoven web through the engraving pattern
Thermally contact the constituent fibers of the web only
It is a dress. More specifically, this partial heat
Adhesion refers to the total surface area of the synthetic nonwoven web layer B.
Specific areas, i.e. individual heat-bonded areas, are not necessarily circular
The shape does not have to be 0.1-1.0 mm ² Area of
And the density, that is, the adhesive point density is 2 to 80 points / cm.
² , Preferably 4 to 60 points / cm² Good thing
Yes. This adhesion point density is 2 points / cm² Less than heat bond
The mechanical properties and shape retention of the subsequent web layer B are not improved,
On the other hand, the adhesion point density is 80 points / cm² Flexibility and
Bulkiness is not improved, and neither is preferable.

The ratio of the area of the total heat-bonded region to the total surface area of the web layer B, that is, the bonded area ratio is 2 to 30%, preferably 4 to 20%. If the bonding area ratio is less than 2%, the dimensional stability of the web layer B after heat bonding is not improved, and therefore, the dimensional stability of the laminated nonwoven fabric obtained by laminating the web layer A on the web layer B is improved. Is inferior and is not preferable.

Further, the surface temperature of the engraved embossing roll to be heat-bonded and the roll having a smooth surface are determined by the synthetic fiber non-woven web layer B.
In the fiber component constituting the, which is determined by the melting point of the low melting point component, the melting point of the low melting point component fiber,
It is advisable to carry out in the range of -10 to -50C. The linear pressure between the embossing roll and the roll having a smooth surface is 5 to 15
0 kg / cm range, more preferably 10 to 100 k
It is in the range of g / cm.

The short fibers used in the short fiber non-woven fabric are obtained by cooling the yarn spun by the mold with the thermoplastic fiber alone or in plural, and then taking it off at a specific speed to obtain an undrawn yarn. After combining a plurality of yarns of No. 1, by a draw ratio within the range of the breaking elongation of the undrawn yarn using a two-stage hot drawing machine,
It can be obtained by performing a stretching treatment, applying crimping and a spinning oil, and then performing a drying treatment to cut a specific fiber length.

The short fibers obtained by the above method are mixed singly or in a desired ratio to form a card web by a card machine and then partially bonded by a hot embossing roll to obtain a nonwoven fabric.

In the present invention, as the short fiber nonwoven web, a thermal through nonwoven fabric by hot air treatment or a spunlace nonwoven fabric by hydroentanglement can be used in addition to the nonwoven fabric by hot embossing.

As described above, the third feature of the sheet of the present invention is that, after the cotton short fiber nonwoven web layer A is laminated on the synthetic fiber nonwoven web layer B, the synthetic fiber nonwoven web layer B is formed. The end is 10 to 30 in the direction that forms the overlapping surface.
A laminated nonwoven fabric that is folded back to a width of mm, is ultrasonically welded to the folded back portion, and is edged, and the laminated nonwoven web is partially ultrasonically welded to be integrated. That is the point. In the case of the ultrasonic welder used in the present invention, an ultrasonic transmitter, an ultrasonic amplifier, and a vibrating plate are arranged in the lower portion, and a dot-shaped or linear convex portion as a welded portion in the upper portion is a single row or a plurality of rows. , Composed of circumferentially arranged rolls.

The ultrasonic transmission frequency is 19.5 to 22.0.
Used in the KHz range. As the engraving portion of the welder portion, engraving rolls in which convex portions having a width of 0.5 to 5 mm and a length of 0.5 to 5 mm are arranged in one row or a plurality of rows at 0.5 to 5 mm intervals, or 0.5 A roll engraved in a straight line or in a plurality of lines within a width range of up to 2 mm can be used.

Roll pressing pressure is 0.2 to 5 kg
A range of / cm is used. In addition, the vacation sheet of the present invention can be subjected to post-processing such as printing or dyeing, if necessary, after the above steps.

[0037]

Since the vacation sheet of the present invention is formed by laminating the cotton short fiber nonwoven web layer A having three-dimensional entanglement on the synthetic fiber nonwoven web layer B, the cotton short fiber nonwoven web layer is formed. In addition to exhibiting excellent water absorption due to A,
The synthetic fiber non-woven web layer B has an appropriate water repellency and prevents water absorption of the ground / floor surface.

[0038]

EXAMPLES The present invention will be described below based on examples. In addition, the measuring method of the Example in this invention measured by the following method.

Melt flow rate value; ASTM D12
It was measured by the method described in 38 (L).

Tensile strength (kg / 5 cm width) of non-woven fabric; using a constant speed extension type tensile tester (Tensilon UTM-4-1-100 manufactured by Toyo Baldwin Co., Ltd.), JIS L-
It was measured according to the strip method described in 1096. That is, 10 sample pieces having a sample width of 5 cm and a sample length of 20 cm were prepared, and a gripping interval of 10 cm and a pulling speed of 10
The maximum tensile strength (kg) is obtained by measuring in cm / min, and the average value of the obtained tensile strength values is the tensile strength (kg /
5 cm width).

Compressive stiffness (g); 5 pieces in total with a sample length of 10 cm and a sample width of 5 cm were prepared, and each sample piece was bent in the longitudinal direction to form a cylindrical object, and each end portion thereof was formed. The bonded sample was used as a sample for measuring compression stiffness. Then, a constant speed extension type tensile tester (Tensilon UTM-4-1-1 manufactured by Toyo Baldwin Co., Ltd.) is used for each measurement sample in the axial direction.
00) was used for compression at a compression rate of 5 cm / min, and the average value of the maximum load values (g) obtained was taken as the compression stiffness (g).

Peeling strength: 10 pieces of sample width 5 cm, sample length 10 cm on both sides from the joint were prepared, and each sample piece was measured by a constant speed extension type tensile tester (Tensilon UTM manufactured by Toyo Baldwin Co., Ltd.). 4-1-100),
Gripping interval is 10 cm around the joint, pulling speed 10 cm
The maximum peel strength was measured individually under the condition of / min, and the average value (kg / 5 cm width) was taken as the peel strength of the joint.

Water absorption (cm / 10 minutes); JIS L-1
By the Bayrec method described in 096, 5 samples with a width of 2.5 cm and a length of 20 cm were prepared, and each test piece was placed at 20 ± 2 ° C.
Hang it with a pin on a horizontal bar supported at a certain height above the water tank containing distilled water. Align the lower end of the test piece in a line and lower the horizontal bar so that 1 cm of the lower end of the test piece is just submerged in water. Next, the height of rise of water (c
m) was measured, and the average value was taken as water absorption (cm / 10 minutes).

Example 1 As a cotton short fiber non-woven web layer A, an average fineness of 1.5
Using a denier, bleached cotton with an average fiber length of 25 mm, a short fiber non-woven web having a basis weight of 85 g / m ^{2 with} a nonuniform fiber arrangement was obtained by a random card machine. This cotton short fiber non-woven web was placed on a 70-mesh net moving at a speed of 20 m / min, and the injection hole diameter was 0.1 m from the position 50 mm above the cotton short fiber non-woven web.
m, water pressure 30 kg / cm ² from the injection holes arranged in a row with an injection hole interval of 0.6 mm as the first preliminary entanglement.
Preliminary entanglement treatment was performed with G water, and subsequently, as the second entanglement treatment, entanglement treatment was performed four times with water having a water pressure of 70 kg / cm ² G.

Further, as the third entanglement treatment, the same net and injection holes as described above are used, and the cotton short fiber non-woven web layer A subjected to the entanglement treatment is reversed to obtain the same water pressure condition as the second time. The entanglement treatment was performed 5 times to obtain a nonwoven web in which the front and back sides were closely entangled.

At the time of the confounding treatment, water at room temperature was used.
Excessive water was removed from the obtained cotton short-fiber non-woven web by mangle, and then a drying treatment was performed by a dryer at a temperature of 100 ° C. The resulting nonwoven web had a basis weight of 83 g / m ² and had dense three-dimensional entanglement on both front and back sides.

As the synthetic fiber non-woven web layer B, a spunbonded nonwoven fabric made of synthetic long fiber filaments was prepared by the following method. Melting point 156 ° C, density 0.98g
/ Cc, a polypropylene polymer chip having a melt flow rate of 56 g / 10 min was used to produce a long-fiber nonwoven web layer by the spunbond method. That is, the polymer chip was melted, melt-spun through a spinning hole at a spinning temperature of 250 ° C., the melt-spun polymer stream was cooled, and then taken out with an air sucker at a take-up speed of 4800 m / min.
The corona discharge means is used to open the fibers, and the fibers are collected and deposited on the moving collection surface to form a nonwoven web composed of long fibers having a short fiber fineness of 3.0 denier, and then the obtained nonwoven web is heated. An adhesive treatment was performed to obtain a synthetic long fiber non-woven web layer having a basis weight of 30 g / m ² . When applying the heat-bonding treatment,
An engraving pattern with an area of 0.6 mm ^{2 has} a density of 20 attachment points / c
An embossing roll arranged at m ² and an adhesion area ratio of 12% and a metal roll having a smooth surface were used. The surface temperature of the embossing roll and the metal roll having a smooth surface is 135 ° C.,
Moreover, the linear pressure between both rolls was set to 10 kg / cm.

The cotton non-woven web layer A obtained by the above-mentioned method is laminated on the synthetic fiber non-woven web layer B, and the laminated non-woven web is subjected to edging by ultrasonic welder treatment, and the laminated non-woven web layer is formed. Ultrasonic welder treatment was partially applied to and integrated.

In the ultrasonic welder, the ultrasonic output frequency was 19.7 KHz, the laminated nonwoven web was integrated, and the engraving roll of the welding portion had an area of 0.36 mm ² , an adhesion area ratio of 7.2% and an adhesion point density. A roll engraved at 20 points / cm ² was used. The linear pressure between the vibrating plate and the roll was 1.0 kg / cm. The resulting laminated nonwoven web has a tensile strength of 15 kg / 5 cm width and a compression stiffness of 58.
g, the water absorbency was 18.6 cm / 10 minutes, and the water absorbency as well as the strength and softness of the non-woven fabric that could be put to practical use were obtained.

The laminated nonwoven web obtained above was cut into a sheet size and subjected to ultrasonic welder treatment as an edge overhang. During the treatment, the welded part has a length of 3 mm in the machine direction, and a protrusion of 1.5 mm in the width direction has a length of 2 m.
Using rolls arranged in a vertical line at m intervals, using an ultrasonic welding machine, the pressing force of the roll was 2 kg / cm ² , the ultrasonic transmission frequency was 19.7 KHz, and the feed rate was 5 m / min. A sheet-shaped nonwoven fabric was formed by subjecting a portion 5 mm inside the fold of the folded portion having a width of 10 mm to a welding process using a protrusion.

The laminated non-woven fabric obtained above had a basis weight of 1
At 10 g / m ² , the mechanical properties and dimensional stability were excellent, the peel strength between the laminated nonwoven webs was 1.5 kg / 5 cm width, and the peel resistance was high and they were well integrated.

As is clear from the examples, the obtained laminated nonwoven fabric can be preferably used as a vacation sheet.

Example 2 As the cotton short fiber nonwoven web layer A, the nonwoven web obtained in Example 1 was used.

Further, as the synthetic fiber non-woven web layer B,
Fineness of short fibers made of polyester with a melting point of 256 ° C 2
Denier, 51 mm long staple fibers, composite spinning / stretched short fibers with a core component composed of polyester having a melting point of 256 ° C. and a modified polyester component having a melting point of 116 ° C. as a sheath component at a weight ratio of 60:40. A card web having nonuniform fiber arrangement was prepared by mixing and using a random card machine.

The hot embossing treatment of the short fiber card web was carried out by the following method. Bonding area is 0.64
An embossing roll provided with an engraving pattern of mm ^{2 at} an adhesion point density of 20 points / cm ² and an adhesion area ratio of 12.8% and a metal roll having a smooth surface were used. The surface temperature of the embossing roll and the metal roll having a smooth surface was 125 ° C., and the linear pressure between both rolls was 10 kg / cm.

The ultrasonic welder treatment for lapping and bonding the laminated nonwoven web layer obtained by laminating the obtained cotton nonwoven web layer A on the synthetic fiber nonwoven web layer B was carried out under the same conditions as in Example 1. As a result, a laminated nonwoven fabric was obtained.

This laminated nonwoven fabric has a basis weight of 110 g / m.
² 、 Tensile strength is 15kg / 5cm width, compression stiffness is 50
g, water absorption of 17.4 cm / 10 minutes, rich in mechanical properties and dimensional stability, water absorption, soft touch and flexibility, and peel strength between nonwoven webs. It had a width of 1.5 kg / 5 cm and had high peel resistance and was well integrated.

As is clear from the examples, the obtained laminated nonwoven fabric can be preferably used as a vacation sheet.

[0059]

INDUSTRIAL APPLICABILITY As described above, according to the present invention, it is possible to provide a travel sheet which is rich in mechanical properties, dimensional stability, water absorption, soft touch and flexibility.

[Brief description of drawings]

FIG. 1 is a perspective view of an essential part of a vacation seat of the present invention.

[Explanation of symbols]

 1 Cotton short fiber non-woven web layer 2 Synthetic fiber non-woven web layer 3 Folded part 4 Processing part by ultrasonic welder 5 Processing part by ultrasonic welder

Claims (3)

[Claims] 1. A vacation sheet comprising a cotton short fiber non-woven web layer A laminated on a synthetic fiber non-woven web layer B, wherein the cotton short fiber non-woven web layer A comprises three-dimensionally composed fibers. A sheet for vacation, wherein the synthetic fiber nonwoven web layer B is entangled and is partially heat-sealed or three-dimensionally entangled. 2. An edge portion of a sheet obtained by laminating a cotton short fiber nonwoven web layer A and a synthetic fiber nonwoven web layer B is folded back to the synthetic fiber nonwoven web layer B side, and an ultrasonic welder is provided at this folded portion. The vacation seat according to claim 1, wherein the seat is subjected to a treatment and edging. 3. A sheet obtained by laminating a cotton short fiber non-woven web layer A and a synthetic fiber non-woven web layer B is partially subjected to an ultrasonic welder treatment so that both web layers A and B are integrated. The vacation seat according to claim 1, wherein: