WO2015056618A1 - Tissu non tissé composite - Google Patents

Tissu non tissé composite Download PDF

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Publication number
WO2015056618A1
WO2015056618A1 PCT/JP2014/076957 JP2014076957W WO2015056618A1 WO 2015056618 A1 WO2015056618 A1 WO 2015056618A1 JP 2014076957 W JP2014076957 W JP 2014076957W WO 2015056618 A1 WO2015056618 A1 WO 2015056618A1
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WIPO (PCT)
Prior art keywords
layer
web
support layer
nonwoven fabric
thermoplastic resin
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PCT/JP2014/076957
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English (en)
Japanese (ja)
Inventor
敦至 宮川
鈴木　得仁
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Ｊｘ日鉱日石エネルギー株式会社
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Publication of WO2015056618A1 publication Critical patent/WO2015056618A1/fr

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B5/00—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts
    • B32B5/22—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by the presence of two or more layers which are next to each other and are fibrous, filamentary, formed of particles or foamed
    • B32B5/24—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by the presence of two or more layers which are next to each other and are fibrous, filamentary, formed of particles or foamed one layer being a fibrous or filamentary layer
    • B32B5/26—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by the presence of two or more layers which are next to each other and are fibrous, filamentary, formed of particles or foamed one layer being a fibrous or filamentary layer another layer next to it also being fibrous or filamentary
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B27/00—Layered products comprising a layer of synthetic resin
    • B32B27/12—Layered products comprising a layer of synthetic resin next to a fibrous or filamentary layer
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B5/00—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts
    • B32B5/02—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by structural features of a fibrous or filamentary layer
    • B32B5/022—Non-woven fabric
    • D—TEXTILES; PAPER
    • D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
    • D04H—MAKING TEXTILE FABRICS, e.g. FROM FIBRES OR FILAMENTARY MATERIAL; FABRICS MADE BY SUCH PROCESSES OR APPARATUS, e.g. FELTS, NON-WOVEN FABRICS; COTTON-WOOL; WADDING ; NON-WOVEN FABRICS FROM STAPLE FIBRES, FILAMENTS OR YARNS, BONDED WITH AT LEAST ONE WEB-LIKE MATERIAL DURING THEIR CONSOLIDATION
    • D04H13/00—Other non-woven fabrics
    • D04H13/02—Production of non-woven fabrics by partial defibrillation of oriented thermoplastics films
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2262/00—Composition or structural features of fibres which form a fibrous or filamentary layer or are present as additives
    • B32B2262/04—Cellulosic plastic fibres, e.g. rayon
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2307/00—Properties of the layers or laminate
    • B32B2307/70—Other properties
    • B32B2307/72—Density

Definitions

  • the present invention relates to a composite nonwoven fabric in which fibers of a web layer are entangled with a reinforcing support layer by a spunlace method, and the web layer and the reinforcing support layer are integrated.
  • Patent Document 1 discloses a reinforcement in which a web layer and a reinforced support layer are integrated by entanglement of a fiber of a web layer made of short fiber-like cellulose fiber or synthetic fiber with a reinforced support layer by a spunlace method.
  • Nonwoven fabric is described.
  • the reinforced support layer is formed of a breathable oriented body, and is excellent in balance between tensile strength and longitudinal and transverse tensile strength, and is excellent in flexibility, texture, and the like. And it is widely used for industrial materials such as filters and industrial wipers, and medical disposable products such as surgical clothes, sheets, towels and masks.
  • the reinforcing support layer a commercially available split fiber nonwoven fabric, for example, the most lightweight and flexible product among Warif (registered trademark) and CLAF (registered trademark) manufactured by JX Nippon Mining & Energy Corporation is used.
  • the split fiber nonwoven fabric is rigid, and when the web layer fibers are hydroentangled by the spunlace method, the jet water flow is rebounded and the fibers cannot be sufficiently intertwined. For this reason, it is difficult for the fibers of the web layer to be entangled with the flat net-like portion of the split fiber nonwoven fabric, and the web layer becomes uneven.
  • the pattern of the reinforced support layer appears on the surface of the composite nonwoven fabric, and the flexibility, flexibility, and touch are deteriorated, and it cannot be put into practical use.
  • the present invention has been made in view of the circumstances as described above, and an object of the present invention is to provide a composite nonwoven fabric that can improve flexibility, flexibility, and touch, and can be expanded to applications that could not be used conventionally. There is to do.
  • a uniaxially oriented body comprising a thermoplastic resin layer and first and second adhesive layers laminated on both surfaces of the thermoplastic resin layer and having a melting point lower than that of the thermoplastic resin is aligned.
  • a network-like reinforcing support layer obtained by laminating via the first or second adhesive layer so that the axes cross each other, and short fiber cellulose entangled with the reinforcing support layer by a spunlace method
  • the layer constitution ratio of the first adhesive layer, the thermoplastic resin layer and the second adhesive layer in the oriented body is 20/60/20 to 30/40/30, and the longitudinal direction and width of the reinforced support layer
  • the average value of the bending resistance by the direction cantilever method 0mm and below, the composite nonwoven fabric is provided.
  • the bending resistance of the reinforcing support layer is as low as 50 mm or less and becomes soft, so that the jet water flow when hydroentangling the fibers of the web layer by the spunlace method is easily entangled with the reinforcing support layer.
  • the fibers can be sufficiently entangled.
  • the basis weight of the reinforcing support layer is as light as 5 to 13 g / m 2 , the number of fibers to be entangled can be increased. As a result, flexibility, flexibility, and touch can be improved, and expansion to applications that could not be used in the past can be achieved.
  • FIGS. 4 and 5 are schematic diagrams illustrating an example of a supply process and subsequent steps for explaining a method for manufacturing a composite nonwoven fabric using a reinforcing support layer formed by the manufacturing method illustrated in FIGS. 4 and 5. It is a figure for demonstrating the examination by the sample which changed the fabric weight of a reinforcement laminated body, the layer composition ratio of a uniaxially oriented body, and the bending resistance by a cantilever method. It is a characteristic view which shows the relationship between the fabric weight of a reinforcement support layer, and the bending resistance by a cantilever method.
  • a web layer composed of short fiber-like cellulose fibers or synthetic fibers is entangled with the reinforcing support layer by a spunlace method, and the web layer and the reinforcing support layer are integrated.
  • the fibers of the web layer are hydroentangled by the spunlace method, paying attention to the fact that the jet water stream is rebounded by the rigidity of the split fiber nonwoven fabric, the fibers cannot be sufficiently entangled, and the reinforcing support layer
  • the web layer fibers are easily entangled by providing flexibility and flexibility. Therefore, first, the structure and manufacturing method of the reinforcing support layer, which is one of the features of the present embodiment, will be described, and then the manufacturing method of the composite nonwoven fabric in which the web layer is entangled with the reinforcing support layer.
  • the reinforcing support layer 1 shown in FIG. 1 is formed of a nonwoven fabric that is laminated so that the orientation axis 2a of the split web 2 and the orientation axis 3a of the slit web 3 intersect each other. And the contact site
  • the split web 2 shown in FIG. 2A is formed by uniaxially stretching a thermoplastic resin film in the longitudinal direction (axial direction of the orientation axis 2a of the split web 2), splitting in the longitudinal direction, and widening. .
  • the split web 2 is made of a thermoplastic resin such as high-density polyethylene and a thermoplastic resin having a melting point lower than that of the thermoplastic resin, such as first and second low-density polyethylenes.
  • a multilayer film (uniaxially oriented body) produced by a molding method such as a multilayer T-die method and having first and second low-density polyethylenes laminated on both sides of a high-density polyethylene is at least in the longitudinal direction (longitudinal direction). Stretch 3 times. After that, splitting is performed using a splitter in a staggered pattern in the same direction to form a net-like film, which is further widened to a predetermined width.
  • the trunk fibers 4 and the branch fibers 5 are formed by the widening to form a net-like body as shown in the figure.
  • the split web 2 has a relatively high strength in the longitudinal direction over the entire width direction.
  • FIG. 2B is an enlarged perspective view of a region B surrounded by an alternate long and short dash line in FIG. 2A.
  • the split web 2 has a three-layer structure in which thermoplastic resin layers 7-1 and 7-2 having a melting point lower than that of the thermoplastic resin are laminated on both surfaces of the thermoplastic resin layer 6.
  • the thermoplastic resin layers 7-1 and 7-2 function as adhesive layers (first and second adhesive layers) between the webs when they are laminated with the slit web 3 when the reinforced support layer 1 is formed.
  • the slit web 3 shown in FIG. 3A is formed by inserting a large number of slits in a lateral direction (axial direction of the orientation axis 3a of the slit web 3) in a thermoplastic resin film and then uniaxially stretching the lateral direction. .
  • the slit web 3 is formed in the lateral direction (width direction) in the portion excluding both ears of the multilayer film, for example, by forming intermittent slits such as a staggered hook in parallel with a hot blade or the like, and then in the lateral direction. It is formed by stretching.
  • the slit web 3 has a relatively high strength in the lateral direction.
  • FIG. 3B is an enlarged perspective view of a region B surrounded by an alternate long and short dash line in FIG. 3A.
  • the slit web 3 has a three-layer structure in which thermoplastic resin layers 7-1 'and 7-2' having a melting point lower than that of the thermoplastic resin are laminated on both surfaces of the thermoplastic resin layer 6 '.
  • These thermoplastic resin layers 7-1 ′ and 7-2 ′ serve as adhesive layers (first and second adhesive layers) between the webs when they are laminated with the split web 2 when the reinforced support layer 1 is formed. Function.
  • the basis weight of the reinforced support layer 1 is 5 to 13 g / m 2 , the thermoplastic resin layers 7-1 and 7-1 ′ (first adhesive layer) in the uniaxially oriented body (split web 2 and slit web 3), thermoplasticity
  • the layer composition ratio of the resin layers 6 and 6 ′ and the thermoplastic resin layers 7-2 and 7-2 ′ (second adhesive layer) is 20/60/20 to 30/40/30.
  • the average value of the bending resistance by the cantilever method in the longitudinal direction (MD) and the width direction (CD) is 50 mm or less.
  • FIG. 4 shows an outline of the manufacturing process of the split web 2.
  • FIG. 5 shows an outline of a process for manufacturing the reinforced support layer 1 by laminating the slit web 3 on the split web 2.
  • the split web 2 includes a multilayer film forming process, a multilayer film orientation process, a split process in which the oriented multilayer film is split in parallel with the orientation axis, and a winding process in which the split film is wound up. It is manufactured through.
  • the film forming process of the multilayer film is a molten resin in the extruder 10, that is, a thermoplastic resin having a low melting point that functions as the first and second adhesive layers, for example, low density polyethylene, and a thermoplastic resin layer, for example, Each high density polyethylene is fed into a separate manifold in a flat die. These resins are joined and joined immediately before the die lip to form the multilayer film 11. The flow rate of each molten resin and the product thickness are adjusted by adjusting the choke bar and lip in the die.
  • roll orientation is performed at a predetermined orientation ratio with respect to the initial dimension through the cooling rollers 12a and 12b that are mirror-finished on the multilayer film 11.
  • the oriented multilayer film 11 is brought into sliding contact with a splitter (rotary blade) 13 that rotates at high speed, and the multilayer film 11 is split (split).
  • the split web 2 formed by splitting is expanded to a predetermined width, and then subjected to a heat treatment in the heat treatment section 14 and wound up to a predetermined length in a winding process. It becomes 15.
  • the horizontal web (slit web 3) is laminated on the vertical web (split web 2) fed out from the winding body 15 formed as described above.
  • the manufacturing process of a horizontal web includes a film forming process of a multilayer film, a slit process in which slit processing is performed at right angles to the longitudinal direction of the multilayer film, and an orientation process of the multilayer slit film.
  • a vertical web is laminated
  • the film forming process of the multilayer film for the slit web 3 includes a molten resin, that is, a thermoplastic resin having a low melting point that functions as the first and second adhesive layers, for example, low density polyethylene. , And a thermoplastic resin layer, such as high density polyethylene, each is fed into a separate manifold in a flat die. These resins are joined and joined immediately before the die lip to form a multilayer film 21. The flow rate of each molten resin and the product thickness are adjusted by adjusting the choke bar and lip in the die.
  • the formed multilayer film 21 is pinched and flattened, and then finely oriented by rolling.
  • transverse slits are put in a staggered manner at right angles to the running direction.
  • the film 21 subjected to the slit treatment is subjected to horizontal alignment in the horizontal alignment step 23.
  • the slit web 3 (lateral web) thus obtained is conveyed to the thermocompression bonding step 24.
  • the longitudinal web (split web 2) is fed from the raw roll 25, is run at a predetermined supply speed, is sent to the widening step 26, is widened several times by a widening machine (not shown), and if necessary. Heat treatment is performed. Thereafter, the longitudinal web is sent to the thermocompression bonding step 24, where the longitudinal web and the transverse web are laminated so that their orientation axes intersect and thermocompression bonded.
  • the longitudinal web 2 and the transverse web 3 are sequentially guided between the thermal cylinder 24a whose outer peripheral surface is a mirror surface and the mirror surface rolls 24b and 24c, and a nip pressure is applied to them, thereby being thermocompression bonded to each other.
  • This manufacturing method includes a web layer forming step, a supplying step for supplying the web layer and the reinforcing support layer, a high-pressure water entanglement step for performing water injection, a drying step, a product winding step, and the like.
  • the fiber arrangement method of the web is as follows: (1) Card parallel by a mechanical card web forming method in which two-dimensionally arranged in the longitudinal direction Method, (2) Card cross layer method by mechanical cross web forming method crossed in oblique direction, (3) Semi-random method by two- and three-dimensional intermediate arrangement semi-random machine, (4) Air fiber Examples include a random method in which three-dimensional arrangement is performed at random by an air-lay web forming method in which a web is formed by flying on a blow and accumulating on a mesh screen.
  • the web forming method varies depending on the type of raw material.
  • a material obtained by wet spinning of recycled fiber or the like, or a material obtained by melt spinning a synthetic fiber by a usual method is used as a raw material
  • a method is used in which fibers are aligned on a card machine to form a web.
  • a method of forming a web as it is is used.
  • short fibers of the web layer examples include short fiber-like cellulosic fibers (natural fibers), and synthetic fibers (including core-sheath fibers) such as polyethylene terephthalate (PET) and polypropylene (PP).
  • short fiber-like cellulosic fibers natural fibers
  • synthetic fibers including core-sheath fibers
  • PET polyethylene terephthalate
  • PP polypropylene
  • FIG. 6 is a schematic diagram showing an example of the steps after the supplying step among the above steps.
  • the web layer 41 fed from the supply roll 41a is supplied to the upper surface of the reinforced support layer 1 fed from the supply roll 42a, or the webs from the supply rolls 41a and 41a ′ are fed to both sides of the reinforced support layer 1.
  • the reinforced support layer 1 fed out from the supply roll 42a is superposed on the web layer directly supplied from the web layer forming step and fed to the subsequent high-pressure water entangling step.
  • a high-pressure water flow is applied to the laminate 44 of the fed web layer and the reinforced support layer on a screen or roll as the transfer support 43 that is permeable or impermeable to treated water.
  • a plurality of thin water streams 45 a are ejected from the injector 45.
  • the screen is not particularly limited, but in order to facilitate the discharge treatment of the treated water, the material, aperture, wire It is preferable to select a diameter or the like.
  • the opening of the screen is usually 20 to 200 mesh.
  • the treated water is easily discharged. Therefore, it is avoided that the web is scattered by jetting a water flow to impair the uniformity. However, a considerable amount of energy still remains in the treated water once permeated through the web, and the energy utilization efficiency is not high.
  • the jet water flow that has permeated the web collides with the transfer support and becomes a repulsive flow and acts on the web again. Entanglement is efficiently performed by the interaction.
  • the high-pressure water flow is jetted onto the web floating in water, the stability of entanglement is lowered.
  • a method of performing a jet treatment of a high-pressure water stream on a treated water-permeable transfer support is preferable in that a stable treatment can be performed and a uniform composite nonwoven fabric can be obtained.
  • the pressure of the jet water flow is 10 to 300 kg / cm 3 , preferably 60 to 150 kg / cm 3 .
  • the web can be entangled even at a relatively low pressure since the bending resistance of the reinforced support layer 1 is low, but the entanglement effect is insufficient when the pressure is less than 10 kg / cm 3 .
  • the cost for generating a high-pressure water flow increases, and handling is difficult, so neither is preferable.
  • the injection is performed once or more, but it is preferable to perform the entanglement by three injections. That is, high-pressure and large-volume water injection mainly for entanglement, low-pressure and small-water injection for surface finishing, intermediate injection, and the like can be used.
  • the shape of the high-pressure fluid is not particularly limited, but a columnar flow is preferable from the viewpoint of energy efficiency.
  • the cross-sectional shape of the columnar flow is determined by the cross-sectional shape of the nozzle or the internal structure of the nozzle outlet, but can be freely selected according to the material, purpose, application, etc. of the web.
  • the processing speed of the high-pressure water jet is 1 to 150 m / min, preferably 20 to 100 m / min. If the processing speed is less than 1 m / min, the productivity is low, and if it exceeds 150 m / min, the entanglement effect is insufficient.
  • the basis weight of the web layer to be entangled with water is preferably 10 to 250 g / m 2 , more preferably 20 to 100 g / m 2 when entangled on one side or both sides. It is. This is because if the basis weight is less than 10 g / m 2 , the fiber density is uneven during high-pressure water treatment, and if it exceeds 250 g / m 2 , the fiber is too dense and inferior in formability, resulting in an increase in cost. Neither is preferred.
  • the basis weight of the reinforcing support layer 1 used as a reinforcing material is 5 to 13 g / m 2 , the strength of the composite nonwoven fabric after hydroentanglement can be improved.
  • the basis weight of the web layer that can remarkably exert the influence of the reinforcing material is preferably 20 to 100 g / m 2 .
  • the laminate composed of the web layer and the reinforcing support layer entangled by high-pressure water jet is then fed to the drying step, where it is dried by, for example, an oven 48, a hot stove or a hot cylinder.
  • the non-woven fabric thus dried is wound up as a composite non-woven fabric 49 in the product winding process to become a product.
  • the surface can be provided with a concavo-convex structure using the heat shrinkage of the reinforced support layer 1 as a base material, and a bulky composite nonwoven fabric can be obtained.
  • a bulky composite non-woven fabric When used as a wiper, a bulky composite non-woven fabric has an advantage that it has a good texture for personal use and can easily capture dust and the like for objective use.
  • the sample number S8 includes the product number 3S (T) of a split fiber nonwoven fabric called Warif (registered trademark) manufactured by JX Nippon Mining & Energy Corporation as Comparative Example 1, and the sample number S9 includes Comparative Example 2
  • the product number S (F) EL and the sample number S10 are the same product number HS (T) as Comparative Example 3.
  • Sample numbers S8 to S10 are all relatively heavy with a basis weight of 18 to 35 g / m 2 , a high proportion of high density polyethylene (74 to 78%), and a layer composition ratio of 13/74/13 to 11/78 / 11 For this reason, strength (tensile strength) and durability are high and firm. However, there is no flexibility and flexibility, and the average value of the bending resistance by the cantilever method is as high as 63 to 78 mm.
  • sample numbers S4 to S6 the basis weight is constant (10 g / m 2 ) and the layer composition ratio is changed.
  • sample numbers S4 and S5 are not satisfactory in terms of flexibility, flexibility, and touch. There wasn't. This is presumably because Sample Nos. S4 and S5 have a high proportion of high-density polyethylene, and the average values of the bending resistance by the cantilever method are 55 mm and 52 mm, respectively.
  • FIG. 8 is a plot of the basis weight of FIG. 7 and the average value of the bending resistance extracted.
  • the basis weight is an inflection point of about several tens of g / m 2, and it is estimated that flexibility, flexibility, touch, and the like are changed.
  • the basis weight preferable for obtaining a practical strength is 5 to 13 g / m 2 as a reinforced support layer with good flexibility, flexibility and touch.
  • the layer composition ratio with which a preferable result was obtained is 26/48/26, but when considering the data of other sample numbers, the layer composition ratio of various commercial products, etc., the change is about several percent.
  • a preferable layer constitution ratio is considered to be 20/60/20 to 30/40/30.
  • the average value of the bending resistance by the cantilever method is 50 mm or less. Sample numbers S2, S3, S6, and S7 that satisfy all of these conditions serve as a reinforced support layer that can sufficiently achieve the intended purpose as a reinforced support layer.
  • sample numbers S2, S3, S6, and S7 are thinner than 80 ⁇ m and the aperture ratio is higher than 50%.
  • flexibility bending softness
  • strength can be achieved at the same time, and that flexibility can be improved by reducing the thickness.
  • the reinforcing support layer that satisfies all the above-mentioned conditions is soft and easily entangled with fibers, and if it has a constant basis weight, it is lightly entangled with water. You can increase the amount of web.
  • FIG. 9 shows the aperture ratio, the base material tensile strength, the base material softness, and the evaluation of the completed reinforced support layer 1 when the basis weight of the reinforced support layer 1 is 10 g / m 2 .
  • Comparative Examples 1 and 2 are product number HS (T) and product number 3S (T), respectively, of the Walliff (registered trademark) manufactured by JX Nippon Oil & Energy Corporation.
  • cotton was used as the web, and entangled with both sides of the reinforcing support layer 1, product number HS (T), and product number 3S (T). The amount of cotton was 30 g for all samples.
  • FIG. 10 shows the evaluation of the finished reinforcing support layer 1 and the aperture ratio, the base material tensile strength and the base material softness when the sum of the basis weight of the reinforcing support layer 1 and the web layer is 55 g / m 2. ing.
  • the product number HS (T) and the product number 3S (T) were used as in FIG.
  • cotton is used as the web, and is entangled with both sides of the reinforcing support layer 1, product number HS (T) and product number 3S (T).
  • the width of the fiber of the reinforcing support layer 1 is preferably a thickness that can ensure the necessary tensile strength, and is preferably thinner than 0.92 mm.
  • the basis weight of the reinforcing support layer is 5 to 13 g / m 2
  • the layer constitution ratio of the first adhesive layer, the thermoplastic resin layer, and the second adhesive layer in the uniaxially oriented body is 20/60/20 to 30. / 40/30.
  • the average value of the bending resistance by the cantilever method is 50 mm or less, and by entwining the web layer made of short fiber-like cellulosic fibers or synthetic fibers with the reinforced support layer by the spunlace method, Flexibility, suppleness, and touch can be improved, and expansion to applications that could not be used in the past can be achieved.
  • FIG. 11 is for explaining a modified example of the above-mentioned reinforcing support layer, and shows another manufacturing method.
  • This reinforcing support layer is formed by laminating two split webs 2 shown in FIGS. 2A and 2B.
  • the vertical web (split web 2-1) produced as shown in FIG. 4 is fed from the raw roll 30 and is fed at a predetermined supply speed to the widening step 31, where it is widened (not shown). Is expanded several times, and heat treatment is performed if necessary.
  • Another split web 2-2 (transverse web) is fed from the raw fabric feed roll 32 in the same manner as the vertical web, traveled at a predetermined supply speed, sent to the widening step 33, and several times by a widening machine (not shown). To widen. After heat treatment if necessary, the sheet is cut to a length equal to the width of the longitudinal web and fed from a direction perpendicular to the running film of the longitudinal web, and the orientation axes of the webs are mutually aligned via the adhesive layers in the laminating step 34. The process is laminated so as to be orthogonal.
  • thermocompression bonding step 35 the longitudinal web and the horizontal web that have been laminated are sequentially guided between the thermal cylinder 35a whose outer peripheral surface is a mirror surface and the mirror surface rolls 35b and 35c to apply nip pressure. Thereby, a vertical web and a horizontal web are mutually thermocompression bonded and integrated. In addition, the contact portions between the adjacent vertical webs and the horizontal webs are entirely surface-bonded.
  • the longitudinal web and the transverse web integrated in this manner are wound up in a winding process to form a wound body 36 of a background laminated nonwoven fabric.
  • the same basis weight (5 to 13 g / m 2 ), layer composition ratio (20/60/20 to 30/40/30) as in the first embodiment, and cantilever method The same effect can be obtained by satisfying all the conditions of the average value (50 mm or less) of the bending resistance.
  • the thickness is preferably less than 80 ⁇ m and the aperture ratio is preferably higher than 50%.
  • the uniaxially oriented body laminates the split web 2 and the slit web 3 two sets of uniaxially oriented tapes arranged in parallel may be laminated.
  • the lamination is performed so that the orientation axis of one set of uniaxially oriented tapes and the orientation axis of the other set of uniaxially oriented tapes are orthogonal to each other.
  • the uniaxially oriented tape has three layers in which first and second adhesive layers (thermoplastic resins) having a melting point lower than that of the thermoplastic resin are laminated on both surfaces of the thermoplastic resin layer.
  • the film is uniaxially oriented in the vertical or horizontal direction and cut into a multilayer stretched tape.
  • the thickness should be thinner than 80 ⁇ m and the aperture ratio should be higher than 50%.
  • the product that touches the human body can improve flexibility, flexibility, and touch. Further, for example, the same effect can be obtained when used for a personal wiper such as an antiperspirant sheet, a makeup remover, and a sweat wipe. Further, when used for an objective wiper such as a factory oil wipe, a flooring wiper, a kitchen towel, etc., it is possible to further improve the trapping and wiping properties of deposits such as dust and oil.

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  • Textile Engineering (AREA)
  • Nonwoven Fabrics (AREA)
  • Laminated Bodies (AREA)

Abstract

L'invention concerne un tissu non tissé composite apte à améliorer la flexibilité, la souplesse et la texture, et à étendre l'utilisation dudit tissu à des applications auparavant irréalisables. Ce tissu non tissé composite est pourvu : d'une couche de corps de support (1) réticulée renforcée, obtenue par la superposition, dans les sens des fils de chaîne et des fils de trame, de corps orientés uniaxialement (2, 3) contenant une couche de résine thermoplastique et des première et seconde couches adhésive présentant un point de fusion inférieur à celui de la résine thermoplastique et superposées sur les deux surfaces de la couche de résine thermoplastique, et par la superposition des corps orientés uniaxialement (2, 3), la première ou la seconde couche adhésive étant interposée entre ces derniers, et de telle manière que les axes d'orientation (2a, 3a) se croisent ; et une couche de bande comprenant des fibres à base de cellulose en forme de fibre courte ou des fibres synthétiques entrelacées avec la couche de support renforcée par le biais du processus d'hydroliage. Selon l'invention, la couche de bande et la couche de support renforcée sont intégrées l'une avec l'autre. La masse par unité de surface de la couche de support renforcée est de 5-13 g/m2, le rapport de composition de la couche dans les corps orientés uniaxialement de la première couche adhésive, de la couche de résine thermoplastique et de la seconde couche adhésive est 20/60/20 à 30/40/30, et la valeur de résistance à la flexion moyenne mesurée par la méthode en porte-à-faux est inférieure ou égale à 50 mm.
PCT/JP2014/076957 2013-10-18 2014-10-08 Tissu non tissé composite WO2015056618A1 (fr)

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JP2013-217740 2013-10-18
JP2013217740A JP5986976B2 (ja) 2013-10-18 2013-10-18 複合不織布

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TWI607126B (zh) * 2015-12-18 2017-12-01 財團法人紡織產業綜合研究所 不織布與其製作方法
CN109642369B9 (zh) * 2016-09-07 2021-10-12 东丽株式会社 层叠无纺布

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JPH0847994A (ja) * 1994-08-05 1996-02-20 Nippon Petrochem Co Ltd 軽量・超強力シートおよびその製造方法
JPH08169076A (ja) * 1994-12-16 1996-07-02 Nippon Petrochem Co Ltd 積層体・不織布または織布並びにそれらを用いた強化積層体
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CN110088218A (zh) * 2016-12-27 2019-08-02 Jxtg能源株式会社 粘胶带
CN110088218B (zh) * 2016-12-27 2022-05-03 Jxtg能源株式会社 粘胶带
US11325342B2 (en) 2016-12-27 2022-05-10 Eneos Corporation Adhesive tape

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TW201529923A (zh) 2015-08-01
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JP5986976B2 (ja) 2016-09-06

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