JP2007084958A - Bulky soft nonwoven fabric and textile product using the same - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a bulky soft nonwoven fabric exhibiting excellent scraping off effects and softness gentle to human skin by mixing and dispersing hill parts of high bulk and plain parts of low bulk on the surface of a laminated nonwoven fabric. <P>SOLUTION: The bulky soft nonwoven fabric is characterized as follows. The bulky soft nonwoven fabric is composed by laminating a nonwoven fabric layer (A) consisting essentially of heat bonding conjugated fibers composed of a low-melting component and a high-melting component having ≥10°C difference in melting point onto a nonwoven fabric layer (B) consisting essentially of fibers having a higher heat shrinkage percentage than that of the heat bonding conjugated fibers composing the nonwoven fabric layer (A). Furthermore, the nonwoven fabric layer (A) is a nonwoven fabric layer having heat joined regions (I) and non-joined regions (II) and the fibers are mutually interlaced in a part of the nonwoven fabric layer (A) and the nonwoven fabric layer (B). The hill parts of high bulk and the plain parts of low bulk are mixed and dispersed on the surface of the laminated nonwoven fabric by heat shrinkage of the nonwoven fabric layer (B). A laminate, a wiping cloth and a textile product are obtained by using the bulky soft woven fabric. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a bulky flexible nonwoven fabric and a textile product using the same. More specifically, the present invention relates to a bulky flexible nonwoven fabric having an excellent scraping property and flexibility, and a fiber product using the same, having an appearance in which a bulky hill portion and a low bulky plain portion are mixed and dispersed on the nonwoven fabric surface.

  Conventional nonwoven fabrics used for wiping wipes, wiping cloths and the like are required to have an excellent scraping effect in order to collect filth and dust. In general, in order to improve the scraping effect, it is conceivable to use the rigidity of the fiber by using a nonwoven fabric composed of a large fineness. In this case, however, the flexibility of the nonwoven fabric itself is reduced, so When used in contact with the skin, the tactile sensation is lowered and is not preferred.

  In addition, products that touch human skin such as wiping wipes are required to have flexibility in touching human skin. In addition, in order to improve the scraping performance of the nonwoven fabric, an appropriate nonwoven fabric rigidity is required, but it has been very difficult to satisfy both functions of scraping property and flexibility.

  On the other hand, as another method, the second fiber layer made of another polymer is formed on at least one surface of the first fiber layer containing at least 50% by weight of the highly shrinkable fiber containing at least 70% by weight of ethylene-propylene random copolymer (EP). These two layers are entangled and integrated between the fibers by a water jet method using a high-pressure water stream to form an entangled nonwoven fabric, and the first fiber layer is shrunk by a subsequent heat treatment, and a number of wrinkles by the second fiber layer are formed on the surface. A bulky nonwoven fabric having an apparent thickness that is more than twice that of the entangled nonwoven fabric is disclosed (see Patent Document 1).

However, in this case, even if the nonwoven fabric is formed by entanglement by the water jet method, since it is not thermally bonded, the strength is lowered, which is not preferable from the practical viewpoint.
In addition, the first fiber layer and the second fiber layer that are entangled and integrated with each other by the heat shrinking action of the first fiber layer by the subsequent heat treatment are shrunk on the entire surface, and the surface of the entangled non-woven fabric has a large number of minute particles due to the second fiber layer. Although wrinkles are formed, the degree of freedom of the fibers is suppressed over the entire surface of the entangled nonwoven fabric, so that a product that touches human skin, such as a wiping cloth, has a problem that the flexibility and texture are impaired.
Japanese Patent No. 3138145

  An object of the present invention is to solve the above-mentioned problems, and a special non-woven fabric layer (A) having a heat-bonding region (I) and a non-bonding region (II), and heat from the non-woven fabric layer (A). By laminating and using the nonwoven fabric layer (B) mainly composed of fibers having a high shrinkage rate, a bulky hill portion and a low plain portion are mixed and dispersed on the surface of the laminated nonwoven fabric. An object of the present invention is to provide a bulky nonwoven fabric that exhibits a scraping effect and softness that is gentle to human skin.

  The inventors of the present invention have made extensive studies in order to solve the above problems. As a result, it has been found that the above-described problems can be solved by having the following configuration, and the present invention has been completed based on this finding.

The present invention has the following configuration.
(1) Non-woven fabric layer (A) mainly composed of a thermo-adhesive conjugate fiber composed of a low-melting-point component having a melting point difference of 10 ° C. or higher and a high-melting-point component, and the thermo-adhesive conjugate fiber constituting the non-woven fabric layer (A) The nonwoven fabric layer (B) mainly composed of fibers having a higher heat shrinkage rate is laminated, and the nonwoven fabric layer (A) is a nonwoven fabric layer having a thermal bonding region (I) and a non-bonding region (II), A part of the nonwoven fabric layer (A) and the nonwoven fabric layer (B) are entangled with each other, and a bulky hill portion and a low plain portion are mixed and dispersed on the surface of the laminated nonwoven fabric due to thermal shrinkage of the nonwoven fabric layer (B). A bulky flexible nonwoven fabric characterized by
(2) Non-woven fabric layer (A) mainly composed of a thermo-adhesive conjugate fiber comprising a low-melting-point component having a melting point difference of 10 ° C. or higher and a high-melting-point component, and the thermo-adhesive conjugate fiber constituting the non-woven fabric layer (A) The nonwoven fabric layer (B) mainly composed of fibers having a higher heat shrinkage rate is laminated, and the nonwoven fabric layer (A) is a nonwoven fabric layer having a thermal bonding region (I) and a non-bonding region (II), The thermal bonding region (I) is a portion thermally bonded to the fiber web through hot air, and the nonwoven fabric layer (A) and a portion of the nonwoven fabric layer (B) are entangled with each other and the heat of the nonwoven fabric layer (B). A bulky flexible nonwoven fabric characterized in that a bulky hill portion and a low bulky plain portion are mixed and dispersed on the surface of the laminated nonwoven fabric due to shrinkage.
(3) The thermal bonding region (I) of the non-woven fabric layer (A) is weakly entangled with the non-woven fabric layer (B). The bulky flexible nonwoven fabric according to (1) or (2), wherein a roof-like bulky hill is formed on the surface.
(4) The roof-like bulky hill on the surface of the laminated nonwoven fabric has no or no fibers between the lower-layer nonwoven fabric layer (B) and forms a very small amount of void layer even if it exists. The bulky flexible nonwoven fabric according to (3) above.
(5) The bulky flexible nonwoven fabric according to any one of (1) to (4), wherein the highly shrinkable thermoplastic fiber is a thermoadhesive conjugate fiber comprising a low melting point component and a high melting point component.
(6) The bulky flexible nonwoven fabric according to any one of (1) to (5), wherein the interlaced fibers of the nonwoven fabric layer (A) and the nonwoven fabric layer (B) are formed by a high-pressure water stream.
(7) The bulky flexible nonwoven fabric according to any one of (1) to (6), wherein the nonwoven fabric layer (A) and / or the nonwoven fabric layer (B) is composed of staple fibers (short fibers).
(8) The bulky flexible nonwoven fabric according to any one of the above (1) to (7), at least one selected from nonwoven fabrics other than the bulk flexible nonwoven fabric, web, woven fabric, knitted fabric, paper-like material, and fiber bundle. A laminate made by stacking seeds.
(9) A wiping cloth using the bulky flexible nonwoven fabric according to any one of (1) to (7) or the laminate according to (8).
(10) A fiber product using the bulky flexible nonwoven fabric according to any one of (1) to (7) or the laminate according to (8).

  The bulky flexible nonwoven fabric of the present invention has a bulky hill portion and a low bulky portion mixedly dispersed on the nonwoven fabric surface, and is bulky and has excellent flexibility. For this reason, since it is excellent in the scraping (wiping off) effect and is also very excellent in the touch, it can be used suitably for a wiping cloth and a wiping cloth.

  The bulky flexible nonwoven fabric of the present invention is a nonwoven fabric layer (A) having a thermal bonding region (I) and a non-bonding region (II) in a nonwoven fabric layer mainly composed of a heat-adhesive conjugate fiber composed of a low melting point component and a high melting point component. ) And a nonwoven fabric layer (B) mainly composed of thermoplastic fibers having higher shrinkage than the nonwoven fabric layer (A), and the nonwoven fabric layer (A) and the nonwoven fabric layer (B) are made of fibers. It is a bulky flexible nonwoven fabric characterized in that a bulky hill portion and a low bulky plain portion are mixed and dispersed on the surface of the laminated nonwoven fabric due to heat shrinkage of the nonwoven fabric layer (B). When the nonwoven fabric layer (A) and the nonwoven fabric layer (B) are laminated and entangled, it is the non-joining region (II) that is mainly involved in the entanglement, and the nonwoven fabric layer (B) in the thermal joining region (I). Confounding is relatively weak. Therefore, when the nonwoven fabric layer (B) is thermally contracted by the subsequent heat treatment, the heat-bonded region (I) is raised to form a bulky hill, but the non-bonded region (II) in which entanglement is sufficiently performed Will not be raised and will be a low plain area.

  The non-woven fabric layer (A) is a heat-bonding region in which only an arbitrary portion of a fiber web mainly composed of heat-adhesive conjugate fibers is intensively heat-bonded (a portion having many heat-bonded fiber intersections). A non-woven fabric having (I) and a non-thermal bonding region (II). It is preferable that the thermal bonding region (I) is thermally bonded through hot air because the portion is not flattened by pressure bonding.

  Examples of the heat-adhesive conjugate fiber include fibers having a low-melting-point component and a high-melting-point component, and in particular, a sheath-core type and an eccentric-type heat-adhesive conjugate fiber composed of polyethylene and polypropylene and polyethylene and polyethylene terephthalate are preferable. However, it is not particularly limited as long as it is a composite fiber having a low melting point component and a high melting point component. The difference in melting point between the low melting point component and the high melting point component is preferably 10 ° C. or more. This is because, in order to form the thermal bonding region (I), the composite fiber intersection is bonded by thermal melting of the low melting point component, and if the melting point difference is too narrow, the temperature of the heat treatment is limited to a narrow range. It is.

  The fineness of the heat-adhesive conjugate fiber is not particularly limited, but when the texture is important, the fineness is selected, and the range is 0.5 dtex to 4 dtex, preferably 1 dtex to 3 dtex.

The basis weight of the nonwoven fabric (A) is preferably low in order to facilitate the subsequent heat shrinkage process. The range is 15 g / m ² to 60 g / m ² , preferably 15 g / m ² to 50 g / m ² , more preferably 15 g / m ² to 30 g / m ² . Although the form of the web which comprises a nonwoven fabric layer (A) is not specifically limited, The web which processed the staple fiber with the card machine is preferable. The staple cut length is preferably 20 mm to 150 mm, and more preferably 30 mm to 120 mm.

  The shape of the thermal bonding region (I) of the nonwoven fabric layer (A) is particularly preferably an elliptical shape having a major axis in the direction perpendicular to the flow direction of the fibers in the nonwoven fabric because the strength of the nonwoven fabric can be improved. Is preferably a staggered pattern, but is not limited thereto. Examples of similar shapes include a circle, an ellipse, a rectangle, and a rhombus.

  The area ratio range between the thermal bonding area (I) and the non-thermal bonding area (II) can be arbitrarily changed as necessary, but in order to obtain a more flexible nonwoven fabric, the non-thermal bonding area is possible. It is preferable to take as much as possible. A specific area ratio range between the thermal bonding region (I) and the non-thermal bonding region (II) is preferably 10:90 to 90:10, and more preferably 30:70 to 70:30.

  Further, the size of the thermal bonding region (I) can be arbitrarily set, and is not particularly limited. However, in the case of an ellipse, a minor axis of about 5 to 30 mm and a major axis of 20 to 50 mm are easy to implement, and other shapes may be used. It is almost according to this size.

  The nonwoven fabric used for a nonwoven fabric layer (A) can be manufactured, for example using a normal hot-air processing machine (suction band dryer). In general, a hot air processing machine sucks hot air at a constant temperature from the bottom of a conveyor net while blowing it to a self-propelled conveyor net, and is suitable for processing heat-bonding conjugate fibers into a bulky nonwoven fabric. Yes.

  The nonwoven fabric layer (A) used in the present invention can be obtained by, for example, covering a web with a porous member (for example, a punching plate) having arbitrary holes and performing hot air treatment. Hot air passes through the hole to form the thermal bonding region (I).

  As long as the nonwoven fabric layer (A) used in the present invention does not interfere with the above conditions (the degree to which the heat-adhesive conjugate fiber in the web is sufficiently adhered by hot air), other fibers are added to the heat-adhesive conjugate fiber. It can also be used after blending. Examples of other fibers used for blended cotton include wood fibers such as cotton and hemp, natural fibers, chemical fibers such as rayon and acetate, and synthetic fibers such as polyester, acrylic and nylon vinyl chloride.

  The highly heat-shrinkable fiber used for the nonwoven fabric layer (B) is not particularly limited as long as it exhibits a higher heat shrinkage rate than the heat-adhesive conjugate fiber used for the nonwoven fabric layer (A). In this case, the thermal shrinkage rate of the fibers of the nonwoven fabric layer (A) and the nonwoven fabric layer (B) is substantially determined by comparing the webs or nonwoven fabrics with the thermal shrinkage rate. As an actual aspect of the nonwoven fabric layer (B), a fiber having a web shrinkage of 40% or more when heat-treated in an oven at 100 ° C. for 5 minutes is preferable. This is because the heat shrinkage rate of the heat-adhesive conjugate fiber used for the nonwoven fabric layer (A) is low, usually about 0 to 5% (when the web is heat-treated in an oven at 100 ° C. for 5 minutes). By using a fiber having a heat shrinkage rate of 40% or more as the nonwoven fabric layer (B), the volume of the hill portion of the resulting nonwoven fabric can be sufficiently increased, and the scraping effect is improved. Such fibers are easily selected from known synthetic fibers such as polyophine fibers, nylon fibers, polyester fibers, polyethylene / polypropylene composite fibers, polyethylene / polyester composite fibers, etc. that meet the above conditions. Can do.

  The highly shrinkable fiber used in the nonwoven fabric layer (B) is preferably staple fiber, and is preferably processed into a web by processing with a card machine. The fineness range of the highly shrinkable fibers used in the nonwoven fabric layer (B) is preferably 1 dtex to 20 dtex, and more preferably 1 dtex to 10 dtex. In such a fineness range, the entanglement when entangled with the nonwoven fabric layer (A) is sufficient. The cut length is preferably 20 mm to 150 mm, more preferably 30 mm to 120 mm. When the cut length is within this range, it is easy to carry out the processing in the card process at the time of web formation, and even in the process of entanglement of the subsequent fibers, the fibers are sufficiently entangled and the entangled state becomes good.

  Examples of the method of entanglement of the nonwoven fabric layer (A) and the fibers of the web constituting the nonwoven fabric layer (B) include a water needle method (also referred to as water jet or spunlace). The water pressure of the water needle is preferably in the range of 4 MPa to 10 MPa. In order to express a bulky hill portion and a low bulky plain portion mixedly on the surface of the laminated nonwoven fabric, the nonwoven fabric layer (A) and the nonwoven fabric layer (B) are laminated by fiber entanglement, and then the nonwoven fabric layer (B ) Heat treatment to promote thermal shrinkage.

The present invention will be further described in detail with reference to the drawings.
FIG. 1 is an overall plan view showing an embodiment of a nonwoven fabric layer (A) according to the present invention.
In FIG. 1, the nonwoven fabric layer (A) 1 is composed of a thermal bonding region (I) 2 and a non-thermal bonding region (II) 3 having a large number of portions where heat-adhesive conjugate fibers are intensively thermally bonded. . The thermal bonding area (I) 2 is subjected to thermal bonding by hot air passing through a portion of a punching plate opened in a zigzag arrangement described later. In this embodiment, the thermal bonding region (I) 2 is not flattened by thermocompression bonding. The thermal bonding region (I) not being flattened by thermocompression bonding is particularly preferable for the flexibility, texture and texture of the bulky flexible nonwoven fabric of the present invention.

“FIG. 2” is a cutaway cross-sectional view taken along the line XX of “FIG. 1”. Further, “FIG. 3” is an enlarged view showing a part A of “FIG. 2” in detail.
In forming the thermal bonding region (I) 2, it can be manufactured as follows. For example, a web is produced with a card machine using a thermoadhesive conjugate fiber. Place a punching plate with oval holes in a staggered arrangement on the web, and perform hot-air heat treatment at a predetermined temperature (the temperature at which the low-melting component of the heat-adhesive conjugate fiber melts but the high-melting component does not melt). Apply. As a result, the portion where the hot air has passed through the opening of the punching plate becomes the thermal bonding region (I) 2, and the portion where the hot air does not pass is not subjected to thermal bonding and forms the non-thermal bonding region (II) 3.

  At this time, an intermediate region portion 4 is formed at the boundary between the thermal bonding region (I) 2 and the non-thermal bonding region (II) 3, and the presence of such an intermediate region portion 4 is caused by the nonwoven fabric layer (A). , (B) The slope of the boundary region between the bulky hill part and the plain part with low bulk formed by the heat treatment after lamination is gentle, which is preferable from the viewpoint of the texture and texture.

"FIG. 4a" is a cross-sectional view of the laminate of the nonwoven fabric layer (A) and the web 5 constituting the nonwoven fabric layer (B) according to the present invention.
FIG. 4B is a cross-sectional view of a laminate of a first fiber layer of a highly shrinkable fiber web and a second fiber layer of another fiber web according to a comparative example of the prior art.

Furthermore, "FIG. 5a" is a schematic cross-sectional view after performing water needle processing from the nonwoven fabric layer (A) side in the state of "FIG. 4a".
"FIG. 5b" is a schematic cross-sectional view after performing water needle processing in the state of FIG. 4b (comparative example).
“FIG. 6” is an enlarged view showing a part B of “FIG. 5 a” in detail.

  In the laminate of the nonwoven fabric layer (A) 1 and the web 5 constituting the nonwoven fabric layer (B) shown in “FIG. 4a”, the thermal joining region (I) 2 and the non-thermal joining region ( II) The existence value of 3 is great. As will be described later, these regions form a bulky hill part and a low bulky part, as will be described later, through the subsequent interaction of water needle processing and heat treatment processing. As a result, the bulky nonwoven fabric of the present invention having the bulkiness, flexibility, and scraping property (wiping property) of the present invention can be obtained.

  In FIG. 4 a, when water needle processing is performed from the nonwoven fabric layer (A) 1 side, the portion where the non-thermal bonding region (II) 3 and the web 5 constituting the nonwoven fabric layer (B) overlap is heat treated. Therefore, a strong entangled portion 6 as shown in FIG. 5a is easily formed by water needle processing.

  On the other hand, in the thermal bonding region (I) 2 of the nonwoven fabric layer (A) 1, entanglement due to the water flow during water needle processing is suppressed to some extent by the strong thermal bonding of the thermal bonding region (I) 2. For this reason, the web 5 which comprises a nonwoven fabric layer (B) forms the comparatively weak part 7 of an entanglement.

  On the other hand, the laminated body of the 1st fiber layer 11 of the highly shrinkable fiber web and the 2nd fiber layer 12 of another fiber web which concerns on the comparative example of "FIG. 4b" is the 1st fiber layer 11 and 2nd. Since the fiber layers 12 are not thermally bonded to each other, both the surfaces become strongly entangled nonwoven fabrics as shown in FIG. 5b by water needle processing.

"FIG. 7a" is the model enlarged view of the bulky flexible nonwoven fabric of this invention which showed the state after heat processing about the B section of the laminated body (FIG. 5a) after water needle processing.
"FIG. 7b" is the model enlarged view which showed the state after heat processing about the laminated body (FIG. 5b) which concerns on the comparative example after water needle processing.

  When the laminate of the web 5 constituting the nonwoven fabric layer (A) 1 and the nonwoven fabric layer (B) is further subjected to heat treatment after water needle processing, the non-thermal bonding region (II) 3 of the nonwoven fabric layer (A) 1 is The non-woven fabric layer (B) 5 is strongly entangled with the highly shrinkable fiber web 6 and is entangled and integrated by heat treatment to form a plain portion 8 having a low bulk. On the other hand, the relatively weakly entangled portion 7 between the heat bonding region (I) 2 of the nonwoven fabric layer (A) 1 and the highly shrinkable fiber web of the nonwoven fabric layer (B) 5 is pulled by the shrinkage of the nonwoven fabric layer (B) 5. Without being formed, the nonwoven fabric layer (B) 5 is separated and raised to form a roof-like bulky hill portion 9 as shown in FIG. 7a. At this time, a void layer 10 is formed between the roof-like bulky hill portion 9 and the non-woven fabric layer (B) 5 so that there is no fiber, or even a small amount of fiber exists even if it exists. Therefore, the degree of entanglement in the above-described portion 7 is such that the bulky hill portion 9 is sufficiently (substantially the same area ratio as the preferred area range of the area ratio range of the thermal bonding region (I) and the non-thermal bonding region (II), That is, the area ratio is preferably 10 to 90%, and more preferably weak enough to be formed (with an area ratio of 30 to 70%).

  In such a structure, the roof-like hill portion 9 contributes to the bulkiness and scraping property, and the low-volume plain portion 8 acts on the storage effect of the scraped dirt and the like. Further, the presence of the void layer 10 can give the laminated nonwoven fabric flexibility and suitable touch and feel.

  On the other hand, in the laminate of the first fiber layer 11 of the highly shrinkable fiber web and the second fiber layer 12 of the other fiber web according to the comparative example, the entire laminated nonwoven fabric is strongly entangled by water needle processing. Therefore, as shown in “FIG. 7 b”, the second fiber layer 12 is also dragged by the heat shrinkage of the first fiber layer 11 of the highly shrinkable fiber web, so that the entire surface of the nonwoven fabric is in a fine wrinkle state. For this reason, since the degree of freedom is suppressed, suitable flexibility and touch feeling cannot be obtained, and a sufficient effect of scraping cannot be obtained.

EXAMPLES Hereinafter, although an Example demonstrates this invention in detail, this invention is not limited to these Examples. The evaluation method is shown below.
<Strong nonwoven fabric>
Using “Autograph AG500D” manufactured by Shimadzu Corporation, the strength of the nonwoven fabric was determined in accordance with a tensile test specified by L1906 of the JIS method. The sample for strength measurement uses a non-woven fabric fiber arrangement direction (MD direction) cut to 150 mm and its vertical direction (CD direction) to 50 mm. The strength was measured at a pulling speed of 100 mm / min and a grip width of 100 mm.

<Bulkyness (specific volume)>
Measure the basis weight of the sample (w: weight per m ^2, actually measure and convert the sample weight of 100 x 100 mm), and use the Toyo Seiki “Digisic Nestester” to load 2 g / cm ^2, measuring the thickness (tmm) under the conditions of measuring speed 2 mm / sec, to calculate the specific volume (v) by the following equation.
(Formula) v = t / w × 1000 (cm ³ / g)
It shows that it is bulky, so that the value of specific volume (v) is high.

<Flexibility>
The evaluation of flexibility (texture) was performed by a sensory test with 10 panelists. When 8 or more of 10 panelists are determined to be flexible, △ When 5 to 7 panelists are determined to be flexible △, 4 out of 10 panelists felt flexible The case where it was below was set as x.

<Area ratio>
Using OMRON "3D Digital Fine Scope VC2400-IMU Ver.2.3", the front and back of the measurement sample were observed, the area of the thermal bonding region (I) was measured, and the area ratio relative to the total area of the measurement sample was calculated. The measurement sample used was cut to 100 × 100 mm.

<Web shrinkage>
Using a miniature card machine, 100 g of raw cotton was passed through with a width of 40 cm to produce a web. The web was cut to 250 × 250 mm and left for 10 minutes. Subsequently, the length of the fiber arrangement direction (MD direction) was measured at three places, and was sandwiched between kraft papers and placed in an oven at 100 ° C. for 5 minutes. After taking out and cooling, the length of three similar places was measured. The web shrinkage was determined by the following formula.
(formula)
Web shrinkage (%) = 100 × (average length before heat treatment−average length after heat treatment) / average length before heat treatment

<Water needle processing conditions>
The web which comprises a nonwoven fabric layer (A) and a nonwoven fabric layer (B) was piled up, and it entangled by applying a water flow of 8 MPa twice from the nonwoven fabric layer (A) side. Processing speed is 10m / min.

<Scraping evaluation>
Artificial dirt (a mixture of white petrolatum, titanium dioxide, and shoe ink) is applied onto a polyester film, an evaluation sample (100 mm × 100 mm) is placed on the polyester film, 1 kg of weight is applied, and the evaluation sample is reciprocated three times. The state of wiping off artificial dirt was confirmed by a human panel.
When 8 or more of 10 panelists judge that there is no dirt or less, ○ When 5 to 7 of 10 panelists judge that there is no dirt or few, △, dirt The case where there were 4 or less of 10 panelists who felt that there were no or few was rated as x.

Example 1
For the non-woven fabric layer (A), a card machine using a heat-adhesive conjugate fiber having a fineness of 1.8 dtex and a cut length of 51 mm composed of polyethylene having a melting point of 130 ° C. for the sheath component and polyethylene terephthalate having a melting point of 250 ° C. for the core component A web having a basis weight of 20 g / m ² was produced. On the web, a punching plate (FIGS. 8 and 9: minor axis a = 5 mm, major axis b = 20 mm) having an elliptical shape with holes formed in a staggered arrangement was placed and subjected to hot air treatment (through air) processing at 135 ° C. The area ratio of the heat bonding area | region (I) of a nonwoven fabric layer (A) was 60%.
The web shrinkage of the fiber used to produce the non-woven fabric layer (A) was 1.2% because no shrinkage was observed even after treatment in an oven at 100 ° C. for 5 minutes, and heat treatment was carried out in an oven at 145 ° C. for 5 minutes. there were.
For the web constituting the nonwoven fabric layer (B), a high shrinkage fiber having a fineness of 2.2 dtex and a cut length of 51 mm in which polypropylenes having different crystal orientations (melting point 160 ° C.) are combined in parallel is used, and the basis weight is 30 g / m. ^Two webs were made. When the web shrinkage of this highly shrinkable fiber was measured, the shrinkage ratio was 75%.
The nonwoven fabric layer (A) is overlaid on the web constituting the nonwoven fabric layer (B), entangled twice by water needle processing at 8 MPa under the condition of 8 MPa twice from the nonwoven fabric layer (A) side, and then oven at 125 ° C. for 10 minutes. Heat treatment was performed at
The resulting laminated nonwoven fabric has a roof-like bulky hill portion and a low bulky plain portion mixed and dispersed on the surface, and there are almost no fibers between the roof-like hill portion and the nonwoven fabric layer (B). The appearance was formed. As for other performances, as shown in Table 1, it was excellent in flexibility and bulkiness and relatively high in strength. Moreover, since the laminated nonwoven fabric has an extremely excellent scraping effect, it has been found that the laminated nonwoven fabric is suitable for a wiping cloth, a wiping cloth, and the like.

Example 2
For the non-woven fabric layer (A), a card machine using a heat-adhesive conjugate fiber having a fineness of 1.8 dtex and a cut length of 51 mm composed of polyethylene having a melting point of 130 ° C. for the sheath component and polyethylene terephthalate having a melting point of 250 ° C. for the core component A web having a basis weight of 20 g / m ² was produced. On the web, a punching plate (FIGS. 8 and 9: minor axis a = 6 mm, major axis b = 30 mm) having an elliptical shape opened in a staggered arrangement was placed, and through-air processing was performed at 135 ° C. The area ratio of the heat bonding area | region (I) of a nonwoven fabric layer (A) was 50%.
The web shrinkage (heat treatment for 5 minutes in an oven at 145 ° C.) of the fibers used to produce the nonwoven fabric layer (A) was 1.2%.
The portion corresponding to the web constituting the non-woven fabric layer (B) is a high shrinkage fiber having a fineness of 3.3 dtex and a cut length of 51 mm in which polypropylenes having different crystal orientations (melting point 160 ° C.) are combined in parallel. An m ² web was made. When the web shrinkage of this highly shrinkable fiber was measured, the shrinkage ratio was 75%. Subsequent lamination, water needle processing and heat treatment processing conditions were the same as in Example 1.
In the obtained laminated nonwoven fabric, a roof-like bulky hill part and a low-plain plain part are mixed and dispersed on the surface, and fibers are almost recognized between the roof-like hill part and the nonwoven fabric layer (B). In other words, it had an appearance in which a void layer was formed. As for other performances, as shown in Table 1, it was excellent in flexibility and bulkiness and relatively high in strength. Moreover, since the laminated nonwoven fabric has an extremely excellent scraping effect, it has been found that the laminated nonwoven fabric is suitable for a wiping cloth, a wiping cloth, and the like.

Example 3
For the non-woven fabric layer (A), the sheath component is made of polyethylene having a melting point of 130 ° C., the core component is made of polyethylene terephthalate having a melting point of 250 ° C., the thermal adhesive composite fiber having a cut length of 51 mm and the fineness of 2.2 dtex, A rayon having a cut length of 51 mm was blended at 70:30 and processed in the same manner as in Example 1. The punching plate used for producing the nonwoven fabric layer (A) was the same as in Example 1, and the area ratio of the thermal bonding region (I) of the nonwoven fabric layer (A) was 55%. The web shrinkage of the heat-adhesive conjugate fiber (heat treatment for 5 minutes in an oven at 145 ° C.) was 0.8%.
For the web constituting the nonwoven fabric layer (B), a heat-adhesive conjugate fiber in which a polypropylene copolymer having a melting point of 130 ° C. and a polypropylene having a melting point of 160 ° C. are combined in parallel, a fineness of 2.2 dtex, and a cut length of 51 mm is used. 1 was processed in the same way. When the web shrinkage of this highly shrinkable fiber was measured, the shrinkage ratio was 70%. Subsequent lamination, water needle processing and heat treatment processing conditions were the same as in Example 1.
In the obtained laminated nonwoven fabric, a roof-like bulky hill part and a low-plain plain part are mixed and dispersed on the surface, and fibers are almost recognized between the roof-like hill part and the nonwoven fabric layer (B). In other words, it had an appearance in which a void layer was formed. As for other performances, as shown in Table 1, it was excellent in flexibility and bulkiness and relatively high in strength. Moreover, since the laminated nonwoven fabric has an extremely excellent scraping effect, it has been found that the laminated nonwoven fabric is suitable for a wiping cloth, a wiping cloth, and the like.

Comparative Example 1
Ethylene-propylene random copolymer fiber (melting point peak temperature 136 ° C) with a fineness of 2.2 dtex and cut length of 51 mm and polypropylene fiber with a fineness of 2.2 dtex and cut length of 51 mm are mixed at 70:30, and the weight is measured with a card machine A 20 g / m ² web was produced. This web was laminated with a web composed of 100% rayon having a fineness of 2.2 dtex and a cut length of 51 mm, and a basis weight of 20 g / m ^2, and then entangled by water needle processing under the same conditions as in Example 1. Subsequently, heat treatment was performed in an oven at 120 ° C. for 10 minutes.
The obtained laminated nonwoven fabric has flexibility as shown in Table 1, but has low bulkiness and low strength. It can also be seen that the scraping effect is not so high.

Comparative Example 2
Ethylene-propylene random copolymer fiber (melting point peak temperature 136 ° C) with a fineness of 2.2 dtex and cut length of 51 mm and polypropylene fiber with a fineness of 2.2 dtex and cut length of 51 mm are mixed at 70:30, and the weight is measured with a card machine A 20 g / m ² web was produced. This web was laminated with a web composed of 100% rayon having a fineness of 2.2 dtex and a cut length of 51 mm and a basis weight of 20 g / m ^2, and then entangled by water needle processing under the same conditions as in Example 1. Subsequently, heat treatment was performed in an oven at 140 ° C. for 10 minutes.
The obtained laminated nonwoven fabric has high nonwoven fabric strength as shown in Table 1, but has low bulkiness and poor flexibility. It can also be seen that the scraping effect is not so high.

Comparative Example 3
Using a heat-adhesive conjugate fiber with a fineness of 1.8 dtex and a cut length of 51 mm composed of polyethylene with a melting point of 130 ° C. for the sheath component and polypropylene with a melting point of 160 ° C. for the core component, a web having a basis weight of 20 g / m ² is used. Was made. A high shrinkage fiber having a fineness of 2.2 dtex and a cut length of 51 mm in which polypropylenes having different crystal orientations (melting point 160 ° C.) were combined in parallel was used to produce a web having a basis weight of 30 g / m ² . When the web shrinkage of this highly shrinkable fiber was measured, the shrinkage ratio was 75%.
Two types of webs were stacked into two layers, entangled by water jet processing (water needle conditions are the same as in Example 1), and then heat treated for 5 minutes in an oven at 125 ° C.
The obtained laminated nonwoven fabric has high flexibility as shown in Table 1, but has low bulkiness and low strength. It can also be seen that the scraping effect is not so high.

Comparative Example 4
Using a heat-adhesive conjugate fiber with a fineness of 1.8 dtex and a cut length of 51 mm composed of polyethylene with a melting point of 130 ° C. for the sheath component and polypropylene with a melting point of 160 ° C. for the core component, a web having a basis weight of 20 g / m ² is used. Was made. A high shrinkage fiber having a fineness of 2.2 dtex and a cut length of 51 mm in which polypropylenes having different crystal orientations (melting point 160 ° C.) were combined in parallel was used to produce a web having a basis weight of 30 g / m ² . When the web shrinkage of this highly shrinkable fiber was measured, the shrinkage ratio was 75%. The water needle conditions are the same as in Example 1.
Two types of webs were overlapped to form two layers, entangled by water jet processing (water needle conditions are the same as in Example 1), and then heat treated in an oven at 135 ° C. for 5 minutes.
The obtained laminated nonwoven fabric has high nonwoven fabric strength as shown in Table 1, but has low bulkiness and poor flexibility. It can also be seen that the scraping effect is not so high.

Comparative Example 5
For the non-woven fabric layer (A), a card machine using a heat-adhesive conjugate fiber having a fineness of 1.8 dtex and a cut length of 51 mm composed of polyethylene having a melting point of 130 ° C. for the sheath component and polyethylene terephthalate having a melting point of 250 ° C. for the core component A web having a basis weight of 20 g / m ² was produced. On the web, an elliptical punching plate (FIGS. 8 and 9: minor axis a = 3, major axis b = 5) opened in a staggered arrangement was subjected to hot air treatment (through air) processing at 135 ° C. The area ratio of the heat bonding area | region (I) of a nonwoven fabric layer (A) was 75%.
The web shrinkage of the fiber used to produce the non-woven fabric layer (A) was 1.0% because no shrinkage was observed even when treated in an oven at 100 ° C. for 5 minutes, and heat treated in an oven at 145 ° C. for 5 minutes. there were.
For the web constituting the nonwoven fabric layer (B), a high shrinkage fiber having a fineness of 2.2 dtex and a cut length of 51 mm in which polypropylenes having different crystal orientations (melting point 160 ° C.) are combined in parallel is used, and the basis weight is 30 g / m. ^Two webs were made. When the web shrinkage of this highly shrinkable fiber was measured, the shrinkage ratio was 75%.
The nonwoven fabric layer (A) is overlaid on the web constituting the nonwoven fabric layer (B), entangled twice by water needle processing at 8 MPa under the condition of 8 MPa twice from the nonwoven fabric layer (A) side, and then oven at 125 ° C. for 10 minutes. Heat treatment was performed at
No mixed dispersion of bulky hills and low plains was observed on the surface of the resulting laminated nonwoven fabric, and the nonwoven fabric according to the present invention was not obtained.

  The nonwoven fabric of the present invention has a bulky hill portion and a low plain portion mixed and dispersed on the surface of the nonwoven fabric, and is bulky and has excellent flexibility, so that the scraping (wiping) effect of filth and a good tactile feel Therefore, it can be suitably used for wiping cloths and wiping cloths. Moreover, since it is excellent in bulkiness and a softness | flexibility, it can utilize as absorbent articles, such as a disposable diaper, the top of a sanitary napkin, and a 2nd sheet | seat.

These are the whole top views which show the form of one Example of the nonwoven fabric layer (A) based on this invention. These are cut-out cross-sectional views along the XX plane of “FIG. 1”. These are the enlarged views showing the A section of "FIG. 2" in detail. Is a. A laminated nonwoven fabric obtained by laminating a web constituting the nonwoven fabric layer (A) and the nonwoven fabric layer (B) according to the present invention; and b. It is sectional drawing which compared the laminated nonwoven fabric which laminated | stacked the 1st fiber layer of the highly shrinkable fiber web which concerns on the comparative example of a prior art, and the 2nd fiber layer of another fiber web. Is a. The laminated nonwoven fabric according to the invention of FIG. 4a, and b. It is a schematic cross section after performing water needle processing to the lamination nonwoven fabric concerning the comparative example of "FIG. 4b". In the laminated nonwoven fabric of the present invention, water needle processing is performed from the nonwoven fabric layer (A) side. FIG. 5 is an enlarged view showing in detail the B part of the laminated nonwoven fabric according to the present invention of “FIG. 5 a”. These are the model enlarged views which compared the state when heat-processing, after carrying out the water needle process of the laminated nonwoven fabric which concerns on this invention, and the laminated nonwoven fabric which concerns on a comparative example, respectively. In "FIG. 7a" which shows this invention, the state after heat processing is shown about the B section of "FIG. 5a". These are punching plate figures used in order to produce a nonwoven fabric layer (A). FIG. 3 is an enlarged view of an opening of a punching plate.

Explanation of symbols

1 Nonwoven fabric layer (A)
2 Thermal bonding area (I)
3 Non-thermal bonding area (II)
4 Intermediate region portion 5 in which thermal bonding region (I) and non-thermal bonding region (II) are mixed 5 Web constituting nonwoven fabric layer (B) Strong interlaced portion 7 Weak entangled portion 8 Low bulk plain portion 9 Roof-shaped Bulkhead hill portion 10 Gap layer 11 First fiber layer 12 of high shrink fiber web Second fiber layer of other fiber web

Claims (10)

  Non-woven fabric layer (A) mainly composed of a thermo-adhesive conjugate fiber composed of a low-melting-point component having a melting point difference of 10 ° C. or higher and a high-melting-point component, and heat shrinkage from the thermo-adhesive conjugate fiber constituting the non-woven fabric layer (A) The nonwoven fabric layer (B) mainly composed of fibers having a high rate is laminated and the nonwoven fabric layer (A) is a nonwoven fabric layer having a thermal joining region (I) and a non-joining region (II), and the nonwoven fabric layer ( A) and a part of the nonwoven fabric layer (B) are such that the fibers are entangled with each other, and a bulky hill portion and a low bulky plain portion are mixed and dispersed on the surface of the laminated nonwoven fabric due to thermal shrinkage of the nonwoven fabric layer (B). A bulky and flexible non-woven fabric.   Non-woven fabric layer (A) mainly composed of a thermo-adhesive conjugate fiber composed of a low-melting-point component having a melting point difference of 10 ° C. or higher and a high-melting-point component, and heat shrinkage from the thermo-adhesive conjugate fiber constituting the non-woven fabric layer (A) The nonwoven fabric layer (B) mainly composed of fibers having a high rate is laminated, and the nonwoven fabric layer (A) is a nonwoven fabric layer having a thermal joining region (I) and a non-joining region (II), and the thermal joining region. (I) is a part thermally bonded to the fiber web through hot air, and a part of the nonwoven fabric layer (A) and the nonwoven fabric layer (B) are entangled with each other and laminated by heat shrinkage of the nonwoven fabric layer (B). A bulky flexible nonwoven fabric characterized in that bulky hills and low plains are mixed and dispersed on the nonwoven fabric surface. The thermal bonding region (I) of the non-woven fabric layer (A) is weakly entangled with the non-woven fabric layer (B), and is separated from the non-woven fabric layer (B) by the thermal shrinkage of the non-woven fabric layer (B) and is raised on the surface of the laminated non-woven fabric. The bulky flexible nonwoven fabric according to claim 1, wherein a bulky hill portion is formed. The roof-like bulky hill portion on the surface of the laminated nonwoven fabric has no or no fiber between the lower-layer nonwoven fabric layer (B) and forms a very small amount of void layer even when present. 3. The bulky flexible nonwoven fabric according to 3. The bulky flexible nonwoven fabric according to any one of claims 1 to 4, wherein the highly shrinkable thermoplastic fiber is a thermoadhesive conjugate fiber comprising a low melting point component and a high melting point component. The bulky flexible nonwoven fabric according to any one of claims 1 to 5, wherein the interlaced fibers of the nonwoven fabric layer (A) and the nonwoven fabric layer (B) are formed by a high-pressure water stream. The bulky flexible nonwoven fabric according to any one of claims 1 to 6, wherein the nonwoven fabric layer (A) and / or the nonwoven fabric layer (B) is composed of staple fibers (short fibers). The bulky flexible nonwoven fabric according to any one of claims 1 to 7, wherein at least one selected from nonwoven fabrics other than the bulk flexible nonwoven fabric, web, woven fabric, knitted fabric, paper-like material, and fiber bundle is laminated. Laminated body. A wiping cloth using the bulky flexible nonwoven fabric according to any one of claims 1 to 7 or the laminate according to claim 8. A fiber product using the bulky flexible nonwoven fabric according to any one of claims 1 to 7 or the laminate according to claim 8.

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