TWI625437B - Composite nonwoven fabric - Google Patents
Composite nonwoven fabric Download PDFInfo
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- TWI625437B TWI625437B TW103135444A TW103135444A TWI625437B TW I625437 B TWI625437 B TW I625437B TW 103135444 A TW103135444 A TW 103135444A TW 103135444 A TW103135444 A TW 103135444A TW I625437 B TWI625437 B TW I625437B
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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
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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
- 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
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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
- B32B5/02—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
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- 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
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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
- 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
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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
- B32B2307/00—Properties of the layers or laminate
- B32B2307/70—Other properties
- B32B2307/72—Density
Landscapes
- Engineering & Computer Science (AREA)
- Textile Engineering (AREA)
- Nonwoven Fabrics (AREA)
- Laminated Bodies (AREA)
Abstract
本發明提供如下複合不織布,其能夠提升柔軟性或柔韌度、手感,且能夠擴大至先前所無法使用之用途。 The present invention provides a composite nonwoven fabric which can improve softness, flexibility, hand feeling, and can be expanded to applications which have not been previously used.
複合不織布具備:網狀的強化支持層1,其係以定向軸2a、3a交叉之方式,分別經由第1或第2接著層而使單軸定向體2、3經緯積層而成,該單軸定向體2、3包含熱塑性樹脂層、與積層於該熱塑性樹脂層的兩面且熔點低於該熱塑性樹脂之第1、第2接著層;網層,其由藉由水針法而纏結於強化支持層之短纖維狀的纖維素系纖維或合成纖維構成;網層與強化支持層已一體化。強化支持層的單位面積重量為5~13g/m2,單軸定向體中的第1接著層、熱塑性樹脂層及第2接著層的層構成比為20/60/20~30/40/30,由懸臂法測得之抗彎曲性的平均值為50mm以下。 The composite nonwoven fabric includes a mesh-shaped reinforcing support layer 1 which is formed by uniaxially orienting the uniaxially oriented bodies 2 and 3 via the first or second subsequent layers so that the orientation axes 2a and 3a intersect each other. The orientation bodies 2 and 3 include a thermoplastic resin layer and a first and second adhesive layer which are laminated on both surfaces of the thermoplastic resin layer and have a lower melting point than the thermoplastic resin; and a mesh layer which is entangled by the water needle method for strengthening The support layer is composed of short-fiber cellulose fibers or synthetic fibers; the mesh layer and the reinforcing support layer are integrated. The basis weight of the reinforcing support layer is 5 to 13 g/m 2 , and the layer composition 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 measured by the cantilever method is 50 mm or less.
Description
本發明係關於一種複合不織布,其係藉由水針(spunlace)法使網層的纖維纏結於強化支持層,使該等網層與強化支持層一體化而成。 The present invention relates to a composite nonwoven fabric in which fibers of a mesh layer are entangled in a reinforcing support layer by a spunlace method, and the mesh layers are integrated with the reinforcing support layer.
於專利文獻1中記載有如下強化不織布,其係藉由水針法使由短纖維狀的纖維素系纖維或合成纖維構成之網層的纖維纏結於強化支持層,藉此,使網層與強化支持層一體化而成。該強化不織布的強化支持層係由通氣性定向體形成,故拉伸強度及縱橫的拉伸強度之平衡性優異,且柔軟性、質地等亦優異。而且,廣泛應用於過濾布或工業用抹布等產業用材料、及手術服、床褥墊(sheet)、毛巾、口罩等醫療一次性製品等。 Patent Document 1 discloses a reinforced non-woven fabric in which a fiber layer of a mesh layer composed of short fiber-like cellulose fibers or synthetic fibers is entangled in a reinforcing support layer by a water needle method, thereby forming a mesh layer. Integrated with the enhanced support layer. Since the reinforcing support layer of the reinforced non-woven fabric is formed of an air permeable oriented body, the tensile strength and the tensile strength of the longitudinal and transverse directions are excellent, and the flexibility, texture, and the like are also excellent. Moreover, it is widely used for industrial materials such as filter cloths and industrial rags, and medical disposable products such as surgical gowns, sheets, towels, and masks.
[專利文獻1]日本公開專利公報:特開平8-158233 [Patent Document 1] Japanese Laid-Open Patent Publication: JP-A-8-158233
然而,上述強化不織布的強度較高且具有韌性,因此作為與人體直接接觸之製品,希望於柔軟性或柔韌度、手感方面有所改良。又,於如對物用抹布之用途方面,存在如下要求,亦即,欲進一步提升對於塵 垢或油等附著物之捕捉性或抹除性。 However, since the above-mentioned reinforced non-woven fabric has high strength and toughness, it is desired to improve the softness, flexibility, and hand feeling as a product that is in direct contact with the human body. Moreover, in the use of the rag for the object, there is a requirement that the dust is to be further improved. Capturing or erasing properties of deposits such as scale or oil.
然而,即便使用市售之分割纖維不織布(split fiber nonwoven),例如JX日礦日石能源股份有限公司(JX Nippon Oil&Energy Corporation)製造之Warifu(註冊商標)或CLAF(註冊商標)中的最輕量且具有柔軟性之製品作為強化支持層,仍難以製造出滿足所期望的柔軟性或柔韌度、手感之複合不織布。其原因在於:分割纖維不織布具有剛性,因此,當利用水針法使網層的纖維水流纏結(hydroentangling)時,噴射水流會濺起,導致無法使纖維充分地纏結。因此,網層的纖維難以纏結於分割纖維不織布的平坦的網狀部分,導致網層不均勻。結果導致於複合不織布的表面出現強化支持層的花紋,柔軟性或柔韌度、手感惡化且不耐用。 However, even if you use a commercially available split fiber non-woven fabric (split fiber) Nonwoven), such as the lightest and softest product of Warifu (registered trademark) or CLAF (registered trademark) manufactured by JX Nippon Oil & Energy Corporation, as a strengthening support layer, is still difficult A composite nonwoven fabric that satisfies the desired softness, flexibility, and hand feel is produced. The reason for this is that the split fiber nonwoven fabric has rigidity, and therefore, when the water flow of the mesh layer is hydroentangling by the water needle method, the jet water flow may splash, resulting in the fiber not being sufficiently entangled. Therefore, the fibers of the mesh layer are difficult to be entangled in the flat mesh portion of the split fiber nonwoven fabric, resulting in uneven mesh layers. As a result, a pattern of the reinforcing support layer appears on the surface of the composite nonwoven fabric, and the flexibility or flexibility, the hand feeling deteriorates, and it is not durable.
本發明係鑒於如上所述之情況而完成者,其目的在於提供如 下複合不織布,該複合不織布能夠提升柔軟性或柔韌度、手感,且能夠擴大至先前所無法使用之用途。 The present invention has been made in view of the circumstances as described above, and its object is to provide A composite non-woven fabric that can improve softness, flexibility, and feel, and can be expanded to previously unusable uses.
根據本發明之一個形態,提供如下複合不織布,其具備:網狀的強化支持層,其係以定向軸交叉之方式,分別經由第1或第2接著層而使單軸定向體經緯積層而成,該單軸定向體包含熱塑性樹脂層、與積層於該熱塑性樹脂層的兩面且熔點低於該熱塑性樹脂之上述第1、第2接著層;網層,其由藉由水針法而纏結於上述強化支持層之短纖維狀的纖維素系纖維或合成纖維構成;上述網層與上述強化支持層已一體化;上述強化支持層的單位面積重量為5~13g/m2,上述單軸定向體中的上述第1接著層、上述熱塑性樹脂層及上述第2接著層的層構成比為20/60/20~30/40/30, 上述強化支持層的長度方向及寬度方向之由懸臂法(cantilever method)測得之抗彎曲性的平均值設為50mm以下。 According to one aspect of the present invention, there is provided a composite nonwoven fabric comprising: a mesh-shaped reinforcing support layer which is formed by uniaxially orienting a uniaxially oriented body via a first or second subsequent layer by intersecting the orientation axes The uniaxially oriented body comprises a thermoplastic resin layer, and the first and second subsequent layers laminated on both sides of the thermoplastic resin layer and having a lower melting point than the thermoplastic resin; the mesh layer is entangled by a water needle method The short fiber-like cellulose fiber or synthetic fiber of the reinforcing support layer; the mesh layer and the reinforcing support layer are integrated; the reinforcing support layer has a basis weight of 5 to 13 g/m 2 , and the uniaxial axis The layer composition ratio of the first back layer, the thermoplastic resin layer, and the second back layer in the oriented body is 20/60/20 to 30/40/30, and the reinforcing support layer has a cantilever in the longitudinal direction and the width direction. The average value of the bending resistance measured by the cantilever method is set to 50 mm or less.
根據本發明,由於強化支持層的抗彎曲性低至50mm以下而變柔軟,故而利用水針法使網層的纖維水流纏結時的噴射水流易於使纖維纏結於強化支持層,且能夠使纖維充分地纏結。此外,由於強化支持層的單位面積重量輕至5~13g/m2,故而能夠增加纏結之纖維。藉此,能夠提升柔軟性或柔韌度、手感,且能夠擴大至先前所無法使用之用途。 According to the present invention, since the bending resistance of the reinforcing support layer is as low as 50 mm or less, the jet water flow when the fiber stream of the mesh layer is entangled by the water needle method tends to cause the fiber to be entangled in the reinforcing support layer, and The fibers are sufficiently entangled. Further, since the basis weight of the reinforcing support layer is as light as 5 to 13 g/m 2 , the entangled fibers can be increased. Thereby, the flexibility, flexibility, and hand feeling can be improved, and the use can be expanded to a previously unusable use.
1‧‧‧強化支持層 1‧‧‧Strengthen support layer
2‧‧‧分叉網 2‧‧‧ fork network
2a‧‧‧定向軸 2a‧‧‧Orientation axis
3‧‧‧狹縫網 3‧‧‧Slit net
3a‧‧‧定向軸 3a‧‧‧Orientation axis
4‧‧‧幹纖維 4‧‧‧Dry fiber
5‧‧‧枝纖維 5‧‧‧ branch fiber
6、6'‧‧‧熱塑性樹脂層 6, 6'‧‧‧ thermoplastic resin layer
7-1、7-1'‧‧‧接著層 7-1, 7-1'‧‧‧Next layer
7-2、7-2'‧‧‧接著層 7-2, 7-2'‧‧‧Next layer
圖1係表示本發明實施形態之複合不織布中所使用的強化支持層之俯視圖。 Fig. 1 is a plan view showing a reinforcing support layer used in a composite nonwoven fabric according to an embodiment of the present invention.
圖2A係表示構成圖1所示之強化支持層之單軸定向體的構成例之立體圖。 Fig. 2A is a perspective view showing a configuration example of a uniaxially oriented body constituting the reinforcing support layer shown in Fig. 1;
圖2B係放大地表示圖2A的一部分之立體圖。 Fig. 2B is a perspective view showing a part of Fig. 2A in an enlarged manner.
圖3A係表示構成圖1所示之強化支持層之單軸定向體的構成例的立體圖。 Fig. 3A is a perspective view showing a configuration example of a uniaxial alignment body constituting the reinforcing support layer shown in Fig. 1;
圖3B係放大地表示圖3A的一部分之立體圖。 Fig. 3B is a perspective view showing a part of Fig. 3A in an enlarged manner.
圖4係表示圖2A及圖2B所示之單軸定向體的製造方法之立體圖。 Fig. 4 is a perspective view showing a method of manufacturing the uniaxial alignment body shown in Figs. 2A and 2B.
圖5係表示圖1所示之強化支持層的第1製造方法之立體圖。 Fig. 5 is a perspective view showing a first manufacturing method of the reinforcing support layer shown in Fig. 1;
圖6係用以說明複合不織布的製造方法之圖,且係表示供給步驟之後的一例的概略圖,該複合不織布使用了圖4及圖5所示之製造方法形成之 強化支持層。 6 is a view for explaining a method of manufacturing a composite nonwoven fabric, and is a schematic view showing an example after the supply step, and the composite nonwoven fabric is formed using the manufacturing method shown in FIGS. 4 and 5. Strengthen the support layer.
圖7係用以說明基於改變了強化積層體的單位面積重量、單軸定向體的層構成比及由懸臂法測得之抗彎曲性後之樣本的研究之圖。 Fig. 7 is a view for explaining a study based on a sample in which the basis weight of the reinforced laminated body, the layer constitution ratio of the uniaxially oriented body, and the bending resistance measured by the cantilever method are changed.
圖8係表示強化支持層的單位面積重量與藉由懸臂法之抗彎曲性的關係之特性圖。 Fig. 8 is a characteristic diagram showing the relationship between the basis weight of the reinforcing support layer and the bending resistance by the cantilever method.
圖9係用以說明改變了基材的單位面積重量且使網層的單位面積重量固定時之、開口率、基材拉伸強度、基材抗彎曲性及強化支持層的抗彎曲性及其評價之圖。 9 is a view for explaining an opening ratio, a tensile strength of a substrate, a bending resistance of a substrate, and a bending resistance of a reinforcing support layer when the basis weight of the substrate is changed and the basis weight of the mesh layer is fixed. Evaluation chart.
圖10係用以說明使基材與網層的單位面積重量之和固定時之、開口率、基材拉伸強度、基材抗彎曲性及強化支持層的抗彎曲性及其評價之圖。 Fig. 10 is a view for explaining the aperture ratio, the tensile strength of the substrate, the bending resistance of the substrate, the bending resistance of the reinforcing support layer, and the evaluation of the bending resistance of the reinforcing support layer when the basis weight of the base material and the mesh layer are fixed.
圖11係表示圖1所示之強化支持層的第2製造方法立體圖。 Fig. 11 is a perspective view showing a second manufacturing method of the reinforcing support layer shown in Fig. 1;
以下,參照圖式說明本發明之實施形態。 Hereinafter, embodiments of the present invention will be described with reference to the drawings.
本發明之實施形態之複合不織布係藉由水針法將由短纖維狀的纖維素系纖維或合成纖維構成之網層纏結於強化支持層,使網層與強化支持層一體化而成。在利用水針法使網層的纖維水流纏結時,噴射水流會因分割纖維不織布的剛性而濺起,導致無法使纖維充分地纏結,本發明著眼於該點,藉由使強化支持層具有柔軟性或柔韌度,使網層的纖維易於纏結。因此,首先說明本實施形態的特徵之一即強化支持層的構成及製造方法,其次說明將網層纏結於該強化支持層之複合不織布的製造方法。 In the composite nonwoven fabric according to the embodiment of the present invention, a mesh layer composed of short-fiber cellulose fibers or synthetic fibers is entangled in a reinforcing support layer by a water needle method, and a mesh layer and a reinforcing support layer are integrated. When the water flow method is used to entangle the fiber water of the mesh layer, the jet water flow is splashed due to the rigidity of the split fiber non-woven fabric, and the fiber cannot be sufficiently entangled. The present invention focuses on this point by making the reinforcing support layer It has softness or flexibility, which makes the fibers of the mesh layer easy to entangle. Therefore, first, a configuration and a manufacturing method of the reinforcing support layer which is one of the features of the present embodiment will be described. Next, a method of manufacturing the composite nonwoven fabric in which the mesh layer is entangled with the reinforcing support layer will be described.
[強化支持層的構成] [Structure of enhanced support layer]
圖1所示之強化支持層1係由如下不織布形成,該不織布以分叉網(split web)2的定向軸2a與狹縫網(slit web)3的定向軸3a相互交叉之方式而經緯積層而成。而且,鄰接之分叉網2與狹縫網3的接觸部位彼此以面接著之方式而接合。 The reinforcing support layer 1 shown in Fig. 1 is formed by a non-woven fabric which is a split net (split) The orientation axis 2a of the web) 2 and the orientation axis 3a of the slit web 3 intersect with each other to form a warp and weft. Further, the contact portions of the adjacent branching net 2 and the slit net 3 are joined to each other in a face-to-face manner.
圖2A及圖3A分別表示構成圖1所示之強化支持層1之分 叉網2與狹縫網3。圖2A所示之分叉網2係使熱塑性樹脂製的膜沿縱方向(分叉網2的定向軸2a的軸方向)單軸延伸,於縱方向上進行纖維分割且拓寬而形成。於分叉網2中使用熱塑性樹脂例如高密度聚乙烯、與熔點低於該熱塑性樹脂之熱塑性樹脂例如第1、第2低密度聚乙烯。 2A and 3A show the points constituting the reinforcing support layer 1 shown in Fig. 1, respectively. The fork mesh 2 and the slit mesh 3. The bifurcated web 2 shown in FIG. 2A is formed by uniaxially stretching a film made of a thermoplastic resin in the longitudinal direction (the axial direction of the orientation axis 2a of the bifurcated web 2), and dividing the fiber in the longitudinal direction and widening it. A thermoplastic resin such as high-density polyethylene and a thermoplastic resin having a melting point lower than the thermoplastic resin such as first and second low-density polyethylene are used in the furcation net 2 .
詳細而言,使多層膜(單軸定向體)沿縱方向(長度方向) 延伸至少3倍,該多層膜係由多層T模法等成形法製作,於高密度聚乙烯的兩面積層有第1、第2低密度聚乙烯。其後,於同一方向呈十字縫地使用分割器(splitter)而進行纖維分割(分叉處理),形成網狀膜,進而將該網狀膜拓寬至既定寬度,形成上述分叉網2。藉由拓寬而形成幹纖維4與枝纖維5,從而形成如圖所示之網狀體。該分叉網2於整個寬度方向上,沿縱方向具有較高之強度。 In detail, the multilayer film (uniaxially oriented body) is oriented in the longitudinal direction (longitudinal direction) The multilayer film is formed by a multilayer T-die method or the like at least three times, and the first and second low-density polyethylenes are formed in the two-layer layer of the high-density polyethylene. Thereafter, the splitter is split in the same direction by a splitter (fiber splitting) to form a mesh film, and the mesh film is widened to a predetermined width to form the split net 2 . The dry fiber 4 and the branch fiber 5 are formed by widening to form a mesh body as shown. The furcation web 2 has a high strength in the longitudinal direction over the entire width direction.
圖2B係圖2A的點劃線所包圍之區域B的放大立體圖。分 叉網2為3層構造,即於熱塑性樹脂層6的兩面積層有熔點低於該熱塑性樹脂之熱塑性樹脂層7-1、7-2。熱塑性樹脂層7-1、7-2於形成強化支持層1時,作為與狹縫網3一併經緯積層時的網彼此的接著層(第1、第2接著層)而發揮功能。 Fig. 2B is an enlarged perspective view of a region B surrounded by a chain line in Fig. 2A. Minute The cross net 2 has a three-layer structure, that is, a thermoplastic resin layer 7-1, 7-2 having a melting point lower than that of the thermoplastic resin in the two-layer layer of the thermoplastic resin layer 6. When the reinforcing resin layer 7-1 and 7-2 are formed, the thermoplastic resin layers 7-1 and 7-2 function as an adhesive layer (first and second adhesive layers) of the mesh when the warp and weft are laminated together with the slit mesh 3.
圖3A所示之狹縫網3係在沿橫方向(狹縫網3的定向軸3a 的軸方向)使熱塑性樹脂製的膜產生多個狹縫之後,沿橫方向單軸延伸而 形成。詳細而言,狹縫網3係於除了上述多層膜的兩耳部之外的部分,沿橫方向(寬度方向)藉由例如熱刀等而平行地形成十字縫等斷續的狹縫之後,沿橫方向延伸而形成。該狹縫網3沿橫方向具有較高之強度。 The slit net 3 shown in Fig. 3A is in the lateral direction (the orientation axis 3a of the slit net 3) The axial direction) is such that a film made of a thermoplastic resin has a plurality of slits and then uniaxially extends in the lateral direction. form. Specifically, the slit net 3 is attached to a portion other than the ear portions of the multilayer film, and an intermittent slit such as a cross slit is formed in parallel in the lateral direction (width direction) by, for example, a hot knife. It is formed by extending in the lateral direction. The slit mesh 3 has a higher strength in the lateral direction.
圖3B係圖3A的點劃線所包圍之區域B的放大立體圖。狹 縫網3為3層構造,即於熱塑性樹脂層6'的兩面積層有熔點低於該熱塑性樹脂之熱塑性樹脂層7-1'、7-2'。該等熱塑性樹脂層7-1'、7-2'於形成強化支持層1時,作為與分叉網2一併經緯積層時的網彼此的接著層(第1、第2接著層)而發揮功能。 Fig. 3B is an enlarged perspective view of a region B surrounded by a chain line in Fig. 3A. narrow The slit net 3 has a three-layer structure in which the two-layer layers of the thermoplastic resin layer 6' have a thermoplastic resin layer 7-1', 7-2' having a lower melting point than the thermoplastic resin. When the reinforcing resin layers 7-1' and 7-2' are formed in the reinforcing support layer 1, the thermoplastic resin layers 7-1' and 7-2' are formed as an adhesive layer (first and second adhesive layers) of the net when the cross-linked web 2 is woven with the cross-web. Features.
上述強化支持層1的單位面積重量為5~13g/m2,單軸定向 體(分叉網2及狹縫網3)中的熱塑性樹脂層7-1、7-1'(第1接著層)、熱塑性樹脂層6、6'及熱塑性樹脂層7-2、7-2'(第2接著層)的層構成比為20/60/20~30/40/30。長度方向(MD)及寬度方向(CD)之由懸臂法測得的抗彎曲性之平均值為50mm以下。 The reinforcing support layer 1 has a basis weight of 5 to 13 g/m 2 , and the thermoplastic resin layers 7-1 and 7-1' in the uniaxially oriented body (the bifurcated web 2 and the slit net 3) (the first subsequent layer) The layer composition ratio of the thermoplastic resin layers 6, 6' and the thermoplastic resin layers 7-2 and 7-2' (second back layer) is 20/60/20 to 30/40/30. The average value of the bending resistance measured by the cantilever method in the longitudinal direction (MD) and the width direction (CD) is 50 mm or less.
[強化支持層的製造方法] [Manufacturing method of strengthening support layer]
其次,根據圖4及圖5說明圖1、圖2A、圖2B、圖3A及圖3B所示之強化支持層1的製造方法。圖4表示分叉網2的製造步驟之概略。又,圖5表示將狹縫網3積層於分叉網2而製造強化支持層1之步驟之概略。 Next, a method of manufacturing the reinforcing support layer 1 shown in Figs. 1, 2A, 2B, 3A, and 3B will be described with reference to Figs. 4 and 5 . Fig. 4 shows an outline of a manufacturing procedure of the furcation net 2. Moreover, FIG. 5 shows the outline of the step of laminating the slit net 3 to the branching net 2 to manufacture the reinforcing support layer 1.
如圖4所示,經由多層膜的製膜步驟、多層膜的定向步驟、 使定向多層膜與定向軸平行地分叉之分叉步驟及捲繞已分叉之膜捲繞之捲繞步驟等而製造分叉網2。 As shown in FIG. 4, the film forming step through the multilayer film, the orientation step of the multilayer film, The furcation web 2 is produced by a bifurcation step of bifurcating the oriented multilayer film in parallel with the orientation axis, a winding step of winding the bifurcated film winding, and the like.
於本例中,多層膜的製膜步驟係在擠出機10中,將熔融樹 脂即作為第1、第2接著層而發揮功能之熔點低之熱塑性樹脂例如低密度聚 乙烯、及熱塑性樹脂層例如高密度聚乙烯分別送入至平模中的各個歧管(manifold)。使該等樹脂於即將到達模唇之前匯流、接合而形成多層膜11。 各熔融樹脂的流量調整或製品厚度之調整係藉由模具內的阻流條(choke bar)或模唇之調整而進行。 In this example, the film forming step of the multilayer film is in the extruder 10, which will melt the tree. The fat is a thermoplastic resin having a low melting point functioning as the first and second adhesive layers, for example, low-density poly Ethylene, and a thermoplastic resin layer such as high density polyethylene are respectively fed into respective manifolds in the flat mold. The resin is joined and joined to form the multilayer film 11 just before reaching the lip. The flow rate adjustment of each molten resin or the adjustment of the thickness of the product is carried out by adjustment of a choke bar or a lip in the mold.
於定向步驟中,使多層膜11經由經鏡面處理後之冷卻輥 12a、12b之間,相對於初始尺寸而以既定的定向倍率進行輥定向。 In the aligning step, the multilayer film 11 is passed through a mirror-finished chill roll Between 12a, 12b, the roller orientation is performed at a given orientation magnification with respect to the initial size.
於分叉(纖維分割)步驟中,使上述定向後之多層膜11與 高速旋轉之分割器(旋轉刀)13滑動接觸,對多層膜11進行分叉處理(纖維分割化)。 In the bifurcation (fiber division) step, the above-mentioned oriented multilayer film 11 is The splitter (rotary knife) 13 that rotates at a high speed is in sliding contact, and the multilayer film 11 is subjected to a bifurcation process (fiber division).
將纖維分割所形成之分叉網2拓寬至既定寬度後,經由熱處 理部14中的熱處理,於捲繞步驟中捲繞為既定長度,從而成為分叉網2的捲繞體15。 After the bifurcated web 2 formed by dividing the fiber is widened to a predetermined width, the heat is passed through The heat treatment in the management unit 14 is wound into a predetermined length in the winding step to form the wound body 15 of the furcation net 2 .
如圖5所示,將橫網(狹縫網3)積層於自以上述方式形成 之捲繞體15送出之縱網(分叉網2)。橫網的製造步驟包含:多層膜的製膜步驟、相對於多層膜的長度方向呈直角地進行狹縫處理之狹縫步驟、及多層狹縫膜的定向步驟。接著,使縱網積層於橫網而進行熱壓接(壓接步驟)。 As shown in FIG. 5, the lateral web (slit net 3) is laminated in the above manner. The vertical web (forked net 2) that the winding body 15 sends out. The manufacturing process of the lateral web includes a film forming step of the multilayer film, a slit step of performing slit processing at right angles to the longitudinal direction of the multilayer film, and an orientation step of the multilayer slit film. Next, the vertical net is laminated on the horizontal web to perform thermocompression bonding (pressure bonding step).
狹縫網3用的多層膜的製膜步驟係與多層膜11同樣地在擠 出機20中,將熔融樹脂即作為第1、第2接著層而發揮功能之熔點低之熱塑性樹脂例如低密度聚乙烯、及熱塑性樹脂層例如高密度聚乙烯分別送入至平模中的各個歧管。使該等樹脂於即將到達模唇之前匯流、接合而形成多層膜21。各熔融樹脂的流量調整或製品厚度之調整係藉由模內的阻流條或模唇之調整而進行。 The film forming step of the multilayer film for the slit net 3 is in the same manner as the multilayer film 11 In the outlet 20, a molten resin, that is, a thermoplastic resin having a low melting point functioning as the first and second adhesive layers, for example, a low-density polyethylene, and a thermoplastic resin layer such as high-density polyethylene are respectively fed into the flat mold. Manifold. The resin is joined and joined to form the multilayer film 21 just before reaching the lip. The flow rate adjustment of each molten resin or the adjustment of the thickness of the product is carried out by adjustment of a choke bar or a lip in the mold.
於狹縫步驟中,夾壓上述已製成的多層膜21而使其扁平 化,其次藉由壓延而進行微定向,利用橫狹縫步驟22,相對於行進方向呈直角且呈十字縫地使該多層膜21產生橫狹縫。 In the slit step, the above-mentioned formed multilayer film 21 is sandwiched to make it flat Then, the multilayer film 21 is horizontally oriented by rolling, and the transverse slits are produced at right angles to the direction of travel.
於定向步驟中,利用橫定向步驟23而對進行了上述狹縫處 理之膜21實施橫定向。將以此種方式獲得之狹縫網3(橫網)搬送至熱壓接步驟24。 In the orientation step, the transverse direction step 23 is used to perform the above slit The film 21 is oriented in a transverse direction. The slit web 3 (horizontal web) obtained in this manner is transferred to the thermocompression bonding step 24.
另一方面,自捲材送出輥25送出縱網(分叉網2),使該縱 網(分叉網2)以既定的供給速度行進,並將其輸送至拓寬步驟26,藉由拓寬機(未圖示)而拓寬數倍之後,根據需要而進行熱處理。其後,將縱網輸送至熱壓接步驟24,於該步驟中,使縱網與橫網以各自的定向軸交叉之方式而積層且進行熱壓接。具體而言,將縱網2及橫網3依序導引至外周面為鏡面之熱圓筒24a與鏡面輥24b、24c之間,對該等網施加夾持壓,藉此,使該等網彼此熱壓接而一體化。藉此,鄰接之縱網2與橫網3的接觸部位彼此全面地進行面接著。將以此種方式而一體化之縱網及橫網搬送至捲繞步驟並捲繞,從而形成強化支持層1的捲繞體27。 On the other hand, the web is fed from the web feed roller 25 to the vertical net (forked net 2) to make the vertical The net (forked net 2) travels at a predetermined supply speed and conveys it to the widening step 26, which is widened by a widening machine (not shown) several times, and then heat-treated as needed. Thereafter, the vertical web is conveyed to the thermocompression bonding step 24, in which the vertical web and the cross web are laminated so as to intersect each other with the orientation axes, and thermocompression bonding is performed. Specifically, the vertical net 2 and the horizontal net 3 are sequentially guided between the hot cylinder 24a having the mirror surface on the outer peripheral surface and the mirror rollers 24b and 24c, and a clamping pressure is applied to the nets, thereby making these The nets are thermocompressed and integrated with each other. Thereby, the contact portions of the adjacent vertical net 2 and the horizontal net 3 are completely surface-to-face. The vertical net and the horizontal net integrated in this manner are conveyed to the winding step and wound to form the wound body 27 of the reinforcing support layer 1.
[複合不織布的製造方法] [Manufacturing method of composite non-woven fabric]
其次,對如下方法進行詳述,該方法藉由水針法將網層纏結於上述強化支持層1,使網層與強化支持層一體化而製造複合不織布。該製造方法包含:網層形成步驟、供給網層與強化支持層之供給步驟、進行水噴射處理之高壓水流纏結步驟、乾燥步驟、及製品捲繞步驟等。 Next, the following method will be described in detail, in which the mesh layer is entangled in the above-mentioned reinforcing support layer 1 by a water needle method, and the mesh layer and the reinforcing support layer are integrated to manufacture a composite nonwoven fabric. The manufacturing method includes a mesh layer forming step, a supply step of the supply mesh layer and the reinforcing support layer, a high pressure water flow entanglement step of performing water jet treatment, a drying step, and a product winding step.
首先,於網層形成步驟中,根據原料種類及最終用途,使用 各種形式做為網的排列或形成方法。作為網的特性,要求其平面內的纖維 分佈均一,作為網的纖維排列方式,可列舉:(1)利用沿縱方向二維排列之機械式梳棉網形成法之梳棉平行方式、(2)利用沿斜方向交叉排列之機械式交叉網形成法之梳棉交叉層方式、(3)利用二維與三維的中間排列的半隨機機械之半隨機方式、及(4)藉由氣流(air laid)式網形成法而三維散亂地進行排列之隨機方式等,該氣流式網形成方法係指藉由吹風而使纖維飄起,接著集聚於網篩(mesh screen)上而形成網。 First, in the step of forming the mesh layer, it is used according to the type of the raw material and the end use. Various forms are used as the arrangement or formation method of the net. As the characteristics of the net, it is required to have fibers in the plane The distribution is uniform, and as the fiber arrangement of the net, (1) a comb-like parallel method using a mechanical card forming method arranged two-dimensionally in the longitudinal direction, and (2) a mechanical cross-over which is arranged by crossing in an oblique direction a carding cross-layer method of mesh forming, (3) a semi-random method using a semi-random mechanical arrangement of two-dimensional and three-dimensional intermediates, and (4) three-dimensionally scattered by an air laid network forming method In a random manner of arranging or the like, the airflow forming method refers to a method in which a fiber is floated by blowing, and then accumulated on a mesh screen to form a mesh.
又,網形成方法會根據原料種類而有所不同。當切割對再生 纖維等進行濕紡(wet spinning)所得之紡絲或藉由通常方法對合成纖維進行熔紡(melt spinning)所得之紡絲等而形成原料時,使用如下方法,即利用梳棉機將纖維梳齊而形成網。於藉由熔噴法進行紡絲所得時,使用直接形成為網之方法。進而存在利用梳棉機將天然纖維梳齊而形成網之方法、或將天然纖維搗碎並進行抄紙之濕式網形成法等。 Moreover, the method of forming the mesh varies depending on the type of the raw material. When cutting to regeneration When a fiber or the like is subjected to spinning by wet spinning or spinning by melt spinning of a synthetic fiber by a usual method to form a raw material, a method is employed in which a fiber comb is combed by a carding machine. Form a net. When the yarn is obtained by the melt blow method, a method of directly forming the web is used. Further, there is a method of forming a net by combing natural fibers with a card, or a wet web forming method of pulverizing natural fibers and performing papermaking.
若列舉上述網層的短纖維的一例,則有短纖維狀的纖維素系 纖維(天然纖維)、或聚對苯二甲酸乙二酯(PET)、聚丙烯(PP)等合成纖維(包含芯鞘纖維)。 When an example of the short fibers of the above-mentioned mesh layer is cited, there is a short-fiber cellulose system. Fiber (natural fiber), or synthetic fiber (including core sheath fiber) such as polyethylene terephthalate (PET) or polypropylene (PP).
圖6係表示上述步驟中的供給步驟之後的步驟的一例之概 略圖。於供給步驟中,將自供給輥41a送出之網層41供給至自供給輥42a送出之強化支持層1的上表面,或將來自供給輥41a、41a'之網層41、41'供給至強化支持層1的兩面。或者將自供給輥42a送出之強化支持層1重疊於自網層形成步驟直接供給之網層,並供給輸送至後續的高壓水流纏結步驟。 Fig. 6 is a view showing an example of the steps after the supply step in the above step. Sketch map. In the supply step, the mesh layer 41 fed from the supply roller 41a is supplied to the upper surface of the reinforcing support layer 1 fed from the supply roller 42a, or the mesh layers 41, 41' from the supply rollers 41a, 41a' are supplied to the reinforcement. Support both sides of layer 1. Alternatively, the reinforcing support layer 1 fed from the supply roller 42a is superposed on the mesh layer directly supplied from the mesh layer forming step, and supplied to the subsequent high-pressure water flow entanglement step.
於接下來的高壓水流纏結步驟中,在作為處理水透過性或不 透過性的移送用支持體43之篩或輥上,自高壓水流噴射器45將較細的複數 股水流45a噴射至所供給輸送之網層與強化支持層的積層體44。此外,噴射高壓水流時,若由於高壓水流的能量,重疊的網層與強化支持層相互錯離或兩者剝離,則纏結處理缺乏穩定性,另外無法獲得具有優異的物理性質之均一的複合不織布。因此,較佳為在噴射水流之前,預先於浸水裝置46中,將上述積層體浸於水46a中。又,較佳為在水流噴射後,藉由設置有減壓抽吸手段等之水分抽吸裝置47來抽吸去除水分,以提高乾燥效率。 In the next high-pressure water entanglement step, as a treatment water permeability or not On the sieve or roller of the transfer support body 43, the finer plural from the high pressure water jet ejector 45 The water stream 45a is sprayed onto the layer 44 of the mesh layer to be supplied and the reinforcing support layer. In addition, when the high-pressure water stream is sprayed, if the overlapping mesh layer and the reinforcing support layer are mutually displaced or both are peeled off due to the energy of the high-pressure water flow, the entanglement treatment lacks stability, and a uniform composite having excellent physical properties cannot be obtained. Not woven. Therefore, it is preferable to immerse the above-mentioned laminated body in the water 46a in advance in the water immersion device 46 before the water flow is sprayed. Further, it is preferable that the water suction device 47 provided with a vacuum suction means or the like is used to suction and remove water after the water jet is sprayed, thereby improving the drying efficiency.
於上述高壓水流纏結步驟中,當在篩上進行高壓水流處理 時,篩並無特別限定,但為了易於進行處理水之排出處理,較佳為配合目的或用途等而選擇材質、孔徑、線徑等。篩的孔徑通常為20~200目。於使用處理水透過性的移送用支持體之方法中,由於容易排出處理水,故而能夠避免因水流的噴射使網飛散而導致均一性受損。然而,透過網後之處理水中暫且仍殘存有大量的能量,故能量的利用效率不高。另一方面,於使用處理水不透過性的移送用支持體之方法中,透過網後之噴射水流撞上會與移送用支持體發生碰撞而成為反彈流,並再次作用於網,因此,能夠藉由噴射流與反彈流的相互作用而效率良好地進行纏結。然而,由於成為對懸浮於水中之網噴射高壓水流之狀態,故而纏結的穩定性降低。於該等方法中,考慮到能夠進行穩定處理且能夠獲得均一的複合不織布,於處理水透過性的移送用支持體上進行高壓水流之噴射處理之方法較佳。 In the above high pressure water flow entanglement step, when high pressure water flow treatment is performed on the sieve In the meantime, the sieve is not particularly limited. However, in order to facilitate the discharge treatment of the treated water, it is preferred to select a material, a pore diameter, a wire diameter, and the like for the purpose of blending or use. The sieve has a pore size of usually 20 to 200 mesh. In the method of using the water-permeable transfer support, since the treated water is easily discharged, it is possible to prevent the net from scattering due to the injection of the water flow, thereby causing the uniformity to be impaired. However, there is still a large amount of energy remaining in the treated water after passing through the net, so the energy utilization efficiency is not high. On the other hand, in the method of using the water-impermeable transfer support, the jet of water that has passed through the mesh collides with the transfer support to become a rebound flow and act on the mesh again. The entanglement is efficiently performed by the interaction of the jet stream and the rebound stream. However, since it is in a state of ejecting a high-pressure water stream to a net suspended in water, the stability of entanglement is lowered. Among these methods, a method of performing a high-pressure water jet blasting treatment on a water-permeable transfer support is considered in consideration of a stable composite treatment and a uniform composite nonwoven fabric.
上述噴射水流的壓力為10~300kg/cm3,較佳為60~150 kg/cm3。由於強化支持層1的抗彎曲性較低,故而即便壓力較低,仍能夠纏結網,但若壓力未達10kg/cm3,則纏結效果不充分。又,若超過300kg/cm3,則生成高壓水流之成本增大,而且難以進行操作,因此皆不佳。進行1次 以上的噴射,較佳為藉由3次的噴射而進行纏結。亦即,能夠分開使用以纏結為主要目的之高壓及大水量之噴射、用於表面精加工的低壓及小水量之噴射、以及兩者中間之噴射。高壓流體的形狀並無特別限定,但就能量效率方面而言,柱狀流較佳。柱狀流的剖面形狀係由噴嘴的剖面形狀或噴嘴的噴出口的內部構造決定,可根據網的材質、目的、用途等自由地選擇。 高壓水流噴射的處理速度為1~150m/min,較佳為20~100m/min。若處理速度未達1m/min,則生產率低,另外若超過150m/min,則纏結效果不充分,因此皆不佳。 The pressure of the jet stream is 10 to 300 kg/cm 3 , preferably 60 to 150 kg/cm 3 . Since the reinforcing support layer 1 has low bending resistance, the net can be entangled even if the pressure is low, but if the pressure is less than 10 kg/cm 3 , the entanglement effect is insufficient. Further, when it exceeds 300 kg/cm 3 , the cost of generating a high-pressure water stream increases, and it is difficult to carry out the operation, which is not preferable. The spraying is performed once or more, preferably by three times of spraying. That is, it is possible to separately use the injection of high pressure and large amount of water for the purpose of entanglement, the injection of low pressure and small amount of water for surface finishing, and the injection between the two. The shape of the high-pressure fluid is not particularly limited, but the columnar flow is preferable in terms 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 discharge port of the nozzle, and can be freely selected depending on the material, purpose, use, and the like of the mesh. The processing speed of the high pressure water jet is 1 to 150 m/min, preferably 20 to 100 m/min. If the treatment speed is less than 1 m/min, the productivity is low, and if it exceeds 150 m/min, the entanglement effect is insufficient, and thus it is not preferable.
將上述強化支持層1用作基材,進行水流纏結之網層的單位 面積重量在纏結於上述強化支持層1的單面或兩面時,較佳為10~250g/m2,更佳為20~100g/m2。若單位面積重量未達10g/m2,則於高壓水流處理時,纖維密度會產生不均勻,另外若超過250g/m2,則會過於緻密而導致成形性不佳,於經濟方面亦會導致成本增加,因此皆不佳。若用作加強材的強化支持層1的單位面積重量為5~13g/m2,則能夠提高水流纏結後的複合不織布的強度。能夠顯著地發揮加強材作用之網層的單位面積重量較佳為20~100g/m2。 When the reinforcing support layer 1 is used as a substrate, the weight per unit area of the water-entangled mesh layer is preferably 10 to 250 g/m 2 when entangled on one or both sides of the reinforcing support layer 1 , more preferably It is 20~100g/m 2 . If the weight per unit area is less than 10 g/m 2 , the fiber density may be uneven during the high-pressure water treatment, and if it exceeds 250 g/m 2 , the density may be too dense and the formability may be poor, which may also result in economical reasons. The cost is increasing, so it is not good. When the basis weight of the reinforcing support layer 1 used as the reinforcing material is 5 to 13 g/m 2 , the strength of the composite nonwoven fabric after the water flow is entangled can be improved. The basis weight of the mesh layer which can significantly exert the reinforcing material action is preferably from 20 to 100 g/m 2 .
其次,將藉由噴射高壓水流而經纏結處理後之由網層與強化 支持層構成之積層體供給輸送至乾燥步驟,於乾燥步驟中,藉由例如烘箱48、熱風爐或熱圓筒等進行乾燥。此外,可在乾燥前預先藉由抽吸等進行脫水,另外亦可於乾燥步驟中使網收縮。以此種方式經乾燥後之不織布於製品捲繞步驟中被捲繞為複合不織布49,並成為製品。 Secondly, the mesh layer and reinforcement after entanglement by spraying high-pressure water flow The laminate body of the support layer is supplied to the drying step, and in the drying step, it is dried by, for example, an oven 48, a hot air furnace or a hot cylinder. Further, the dehydration may be carried out by suction or the like before drying, or may be contracted in the drying step. The non-woven fabric dried in this manner is wound into a composite nonwoven fabric 49 in the product winding step, and becomes a product.
於上述乾燥步驟中,能夠藉由調整溫度而利用基材即強化支 持層1的熱收縮,使表面產生凹凸構造,從而能夠製成巨大的複合不織布。 巨大的複合不織布於用作抹布之情形時具有以下優點:對人用時,手感佳,對物用時,能夠容易地捕捉塵垢等。 In the above drying step, the substrate can be used to strengthen the branch by adjusting the temperature. The heat shrinkage of the layer 1 causes the surface to have a concavo-convex structure, so that a large composite nonwoven fabric can be produced. When a large composite non-woven fabric is used as a rag, it has the following advantages: when used for a person, it has a good hand feeling, and when used for a thing, it can easily catch dust and the like.
[驗證] [verification]
利用水針法使網層的纖維水流纏結時,噴射水流會濺起,本發明者等著眼於此,準備改變了強化積層體1的單位面積重量、單軸定向體的層構成比、長度方向及寬度方向之由懸臂法測得之抗彎曲性的平均值等後之樣本,並進行了研究。又,驗證了藉由水針法纏結網層而使網層與強化支持層一體化時的柔軟性或柔韌度、手感等。結果獲得了如下見解。 When the water-needle method is used to entangle the fiber water of the mesh layer, the jet stream is splashed, and the inventors of the present invention have focused on this, and are prepared to change the basis weight of the laminated body 1 and the layer composition ratio and length of the uniaxially oriented body. A sample of the average value of the bending resistance measured by the cantilever method in the direction and the width direction was examined. Further, it was confirmed that the mesh layer was entangled by a water needle method to achieve flexibility, flexibility, hand feeling, and the like when the mesh layer and the reinforcing support layer were integrated. As a result, the following findings were obtained.
圖7中,於樣本編號S8中,使用JX日礦日石能源股份有限 公司製造的稱為Warifu(註冊商標)之分割纖維不織布的製品編號3S(T)作為比較例1,於樣本編號S9中,使用相同製品編號S(F)EL作為比較例2,於樣本編號S10中,使用相同製品編號HS(T)作為比較例3。 In Figure 7, in sample number S8, use JX Nippon Mining & Energy Co., Ltd. The product number 3S (T) of the segmented fiber non-woven fabric called Warifu (registered trademark) manufactured by the company is Comparative Example 1, and the same product number S (F) EL is used as the comparative example 2 in the sample No. S9, in the sample No. S10. In the same, the same product number HS (T) was used as Comparative Example 3.
樣本編號S8~S10的單位面積重量皆為較重的18~35 g/m2,高密度聚乙烯的比例高(74~78%),層構成比變為13/74/13~11/78/11。 因此,強度(拉伸強度)或耐久性較高且具有韌性。然而,無柔軟性或柔韌度,由懸臂法測得之抗彎曲性的平均值高達63~78mm。 The unit weight of sample No. S8~S10 is 18~35 g/m 2 , the ratio of high density polyethylene is high (74~78%), and the layer composition ratio becomes 13/74/13~11/78. /11. Therefore, strength (tensile strength) or durability is high and toughness. However, without softness or flexibility, the average value of the bending resistance measured by the cantilever method is as high as 63 to 78 mm.
相對於此,樣本編號S1~S7的單位面積重量為輕量的4~ 13g/m2,且由懸臂法測得之抗彎曲性的平均值為6~55mm。該等樣本編號S1~S7柔軟且柔韌,手感亦較佳。然而,於單位面積重量為4g/m2之樣本編號S1之情形時,長度方向(MD)的拉伸強度為MD=18(N/50mm),寬度方向(CD)的拉伸強度為CD=15(N/50mm),皆為20N/50mm以下, 未滿足作為強化支持層之實用強度。 On the other hand, the unit weight of the sample numbers S1 to S7 is a light weight of 4 to 13 g/m 2 , and the average value of the bending resistance measured by the cantilever method is 6 to 55 mm. The sample numbers S1 to S7 are soft and flexible, and the hand feel is also good. However, in the case of the sample number S1 having a basis weight of 4 g/m 2 , the tensile strength in the longitudinal direction (MD) is MD = 18 (N / 50 mm), and the tensile strength in the width direction (CD) is CD = 15 (N/50 mm), all of which are 20 N/50 mm or less, which does not satisfy the practical strength as a reinforcing support layer.
又,樣本編號S4~S6中,使單位面積重量固定(10g/m2) 而改變層構成比,樣本編號S4、S5未能夠滿足柔軟性或柔韌度、手感。一般認為原因在於:樣本編號S4、S5的高密度聚乙烯的比例高,由懸臂法測得之抗彎曲性的平均值分別為55mm、52mm且具有韌性。 Further, in the sample numbers S4 to S6, the unit area weight was fixed (10 g/m 2 ) to change the layer constitution ratio, and the sample numbers S4 and S5 were not able to satisfy the flexibility, the flexibility, and the hand feeling. The reason is generally considered to be that the ratio of the high-density polyethylene of the sample numbers S4 and S5 is high, and the average value of the bending resistance measured by the cantilever method is 55 mm and 52 mm, respectively, and has toughness.
圖8係將上述圖7的單位面積重量與抗彎曲性的平均值抽出 並繪圖所得之圖。根據圖8可知單位面積重量在十幾g/m2左右有反曲點,可推斷柔軟性、柔韌度、手感等發生了變化。 Fig. 8 is a view obtained by extracting and plotting the average value of the basis weight and the bending resistance of Fig. 7 described above. According to Fig. 8, it can be seen that the weight per unit area has an inflection point of about ten g/m 2 , and it can be inferred that the flexibility, the flexibility, the hand feeling, and the like are changed.
根據該圖8及圖7的測定結果,已知作為強化支持層,為了 使柔軟性、柔韌度、手感較佳且獲得實用強度(拉伸強度),較佳的單位面積重量處於5~13g/m2之範圍內。又,獲得了較佳結果之層構成比為26/48/26,但若考慮其他樣本編號的資料、或市售的各種商品的層構成比等,則一般認為在數%左右之變化下無急遽變化,較佳的層構成比為20/60/20~30/40/30。進而,由懸臂法測得之抗彎曲性的平均值為50mm以下。完全滿足上述條件之樣本編號S2、S3、S6、S7作為強化支持層,成為能夠分地實現所期望的目的之強化支持層。 According to the measurement results of FIGS. 8 and 7, it is known that the reinforcing support layer is preferably 5 to 13 g/weight in order to obtain flexibility, flexibility, and hand feeling, and to obtain practical strength (tensile strength). Within the range of m 2 . Further, the layer composition ratio obtained as a preferable result is 26/48/26. However, considering the data of other sample numbers or the layer composition ratio of various commercially available products, it is generally considered that there is no change of about several %. In a hurry, the preferred layer composition ratio is 20/60/20~30/40/30. Further, the average value of the bending resistance measured by the cantilever method was 50 mm or less. The sample numbers S2, S3, S6, and S7 satisfying the above conditions as the reinforcement support layer become a reinforcement support layer capable of achieving the desired purpose in a different manner.
而且,上述樣本編號S2、S3、S6、S7的厚度薄於80μm, 開口率高於50%。已確認若處於此種數值範圍,則能夠兼顧柔韌度(抗彎曲性)與強度,並且能夠藉由使厚度變薄而進一步提升柔韌度。又,於上述製造步驟中,為了使強化支持層1的拉伸強度達到20N/50mm以上,較佳為將多層膜11、21的延伸倍率設為3倍以上。 Moreover, the above sample numbers S2, S3, S6, and S7 are thinner than 80 μm. The aperture ratio is higher than 50%. It has been confirmed that if it is in such a numerical range, flexibility (bending resistance) and strength can be achieved, and flexibility can be further improved by making the thickness thin. Further, in the above-described production step, in order to increase the tensile strength of the reinforcing support layer 1 to 20 N/50 mm or more, it is preferable to set the stretching ratio of the multilayer films 11 and 21 to 3 or more.
完全滿足上述條件之強化支持層如圖9及圖10中的實施例 所示,纖維因柔軟而易於纏結,若單位面積重量固定,則由於輕量,故而能夠增加進行水流纏結之網的量。 The reinforcement support layer that fully satisfies the above conditions is as shown in the embodiment of FIGS. 9 and 10. As shown, the fibers are easily entangled due to being soft, and if the weight per unit area is fixed, the amount of the net entangled by the water flow can be increased because of the light weight.
圖9表示了將強化支持層1的單位面積重量設為10g/m2時 的開口率、基材拉伸強度及基材抗彎曲性、與已完成的強化支持層1的評價。比較例1、2分別為JX日礦日石股份有限公司製造的Warifu(註冊商標)中的製品編號HS(T)與製品編號3S(T)。此處,使用棉作為網,使該網分別纏結於強化支持層1、製品編號HS(T)及製品編號3S(T)的兩面。全部的樣本中,棉的量皆設為30g。 Fig. 9 shows the evaluation of the aperture ratio, the tensile strength of the substrate, the bending resistance of the substrate, and the completed reinforcing support layer 1 when the basis weight of the reinforcing support layer 1 is 10 g/m 2 . Comparative Examples 1 and 2 are product number HS (T) and product number 3S (T) in Warifu (registered trademark) manufactured by JX Nippon Mining Co., Ltd., respectively. Here, cotton is used as a net, and the net is entangled on both sides of the reinforcing support layer 1, the article number HS (T), and the article number 3S (T). In all the samples, the amount of cotton was set to 30 g.
如圖9所示,對於HS(T)而言,芯材即強化支持層1的表 面彈開了噴射水流,棉之纏結存在少許不均勻且不耐用。對於3S(T)而言,芯材即強化支持層1的表面亦一定程度地彈開了噴射水流,因此,棉之纏結不充分,亦產生了不均勻且不充分。相對於此,於實施例之情形時,棉均勻且完美地纏結。如此,單位面積重量越輕,則棉之纏結越佳,實施例的纏結不均勻最少。 As shown in FIG. 9, for HS (T), the core material is a table of the reinforcing support layer 1. The surface bounces the jet of water, and the entanglement of the cotton is somewhat uneven and not durable. For 3S (T), the surface of the core material, that is, the surface of the reinforcing support layer 1, also bounces the jet of water to a certain extent. Therefore, the entanglement of the cotton is insufficient, and unevenness and insufficientness are also generated. In contrast, in the case of the embodiment, the cotton is uniformly and perfectly entangled. Thus, the lighter the basis weight, the better the entanglement of the cotton, and the entanglement unevenness of the examples is the least.
圖10表示了將強化支持層1與網層的單位面積重量之和設 為55g/m2時的開口率、基材拉伸強度及基材抗彎曲性、與已完成的強化支持層1的評價。與圖9同樣地分別使用製品編號HS(T)與製品編號3S(T)作為比較例1、2。此處,亦使用棉作為網,使該網分別纏結於強化支持層1、製品編號HS(T)及製品編號3S(T)的兩面。 Fig. 10 is a view showing an aperture ratio, a tensile strength of a substrate, and a bending resistance of a substrate when the sum of the weight per unit area of the reinforcing support layer 1 and the mesh layer is 55 g/m 2 , and the completed reinforcing support layer 1 Evaluation. In the same manner as in Fig. 9, the product number HS (T) and the product number 3S (T) were used as Comparative Examples 1 and 2, respectively. Here, cotton is also used as the net, and the net is entangled on both sides of the reinforcing support layer 1, the product number HS (T) and the product number 3S (T).
如圖10所示,對於HS(T)而言,棉的量少,芯材即強化 支持層1的表面彈開了噴射水流,棉之纏結存在少許不均勻且不耐用。對於3S(T)而言,芯材即強化支持層1的表面一定程度地彈開了噴射水流, 因此,棉之纏結不充分,亦產生了不均勻且不充分。於實施例中,棉均勻且完美地纏結。如此,相對於強化支持層1,網層的單位面積重量越大,則棉之纏結越佳,實施例的纏結不均勻最少。 As shown in Fig. 10, for HS (T), the amount of cotton is small, and the core material is strengthened. The surface of the support layer 1 bounces off the jet of water, and the entanglement of the cotton is somewhat uneven and not durable. For 3S(T), the surface of the core material, that is, the reinforcing support layer 1, bounces the jet stream to a certain extent. Therefore, the entanglement of the cotton is insufficient, and unevenness and insufficientness are also generated. In the examples, the cotton is evenly and perfectly entangled. Thus, with respect to the reinforcing support layer 1, the larger the basis weight of the mesh layer, the better the entanglement of the cotton, and the entanglement unevenness of the embodiment is the least.
此外,如圖9及圖10所示,3S(T)及實施例與樣本S1相 比較,MD纖維變細,可推斷由於纖維細,故而不易彈開噴射水流。因此,強化支持層1的纖維的寬度為能夠確保必需之拉伸強度之粗細,細於0.92mm即可。 In addition, as shown in FIG. 9 and FIG. 10, 3S(T) and the embodiment are in phase with the sample S1. In comparison, the MD fiber is thinned, and it can be inferred that since the fiber is fine, it is not easy to bounce off the jet stream. Therefore, the width of the fiber of the reinforcing support layer 1 is such that the thickness of the necessary tensile strength can be ensured, and it is finer than 0.92 mm.
如上所述,強化支持層的單位面積重量為5~13g/m2、單軸 定向體中的第1接著層、熱塑性樹脂層及第2接著層的層構成比為20/60/20~30/40/30。而且,將由懸臂法測得之抗彎曲性的平均值設為50mm以下,藉由水針法使由短纖維狀的纖維素系纖維或合成纖維構成之網層纏結於該強化支持層,從而製成複合不織布,藉此,能夠提升柔軟性或柔韌度、手感,且能夠擴大至先前所無法使用之用途。 As described above, the basis weight of the reinforcing support layer is 5 to 13 g/m 2 , and the layer composition 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. Further, the average value of the bending resistance measured by the cantilever method is 50 mm or less, and a mesh layer composed of short fiber-like cellulose fibers or synthetic fibers is entangled in the reinforcing support layer by a water needle method. A composite nonwoven fabric is produced, whereby the flexibility, flexibility, and hand feeling can be improved, and the use can be expanded to a previously unusable use.
<變形例1> <Modification 1>
圖11係用以說明上述強化支持層的變形例之圖,其表示了其他製造方法。該強化支持層係積層有2張圖2A及圖2B所示之分叉網2之強化支持層。自捲材送出輥30送出以圖4所示之方式製造出之縱網(分叉網2-1),使該縱網(分叉網2-1)以既定的供給速度行進,並將其輸送至拓寬步驟31,藉由拓寬機(未圖示)而拓寬數倍之後,根據需要而進行熱處理。 Fig. 11 is a view for explaining a modification of the above-described reinforcing support layer, and shows another manufacturing method. The reinforcing support layer is provided with two reinforcing support layers of the split net 2 shown in FIG. 2A and FIG. 2B. The web (the bifurcation net 2-1) manufactured in the manner shown in Fig. 4 is sent out from the web feeding roller 30, and the vertical web (the bifurcation net 2-1) is advanced at a predetermined supply speed, and After being conveyed to the widening step 31, the width is increased by a plurality of times by a widening machine (not shown), and then heat treatment is performed as needed.
與縱網同樣地自捲材送出輥32送出另一分叉網2-2(橫 網),使該另一分叉網2-2(橫網)以既定的供給速度行進,並將其輸送至拓寬步驟33,藉由拓寬機(未圖示)而拓寬數倍。根據需要進行熱處理後, 切斷為與縱網的寬度相等之長度,自相對於縱網的行進膜呈直角之方向供給上述另一分叉網2-2(橫網),於積層步驟34中,經由各接著層,以各網的定向軸相互正交之方式進行經緯積層。於熱壓接步驟35中,將經緯積層後之縱網及橫網依序導引至外周面為鏡面之熱圓筒35a與鏡面輥35b、35c之間,並施加夾持壓。藉此,縱網與橫網彼此熱壓接而一體化。又,鄰接之縱網與橫網之接觸部位彼此全面地進行面接著。以此種方式而一體化之縱網及橫網於捲繞步驟中被捲繞,成為經緯積層不織布的捲繞體36。 Similarly to the vertical net, the coil feeding roller 32 sends out another furcation net 2-2 (horizontal The other forked web 2-2 (horizontal web) is advanced at a predetermined supply speed and transported to the widening step 33, which is multiplied by a widening machine (not shown). After heat treatment as needed, The length is equal to the width of the vertical net, and is supplied to the other furcation net 2-2 (horizontal net) from a direction perpendicular to the traveling film of the vertical net, and in the laminating step 34, via each of the subsequent layers. The warp and weft layers are formed in such a manner that the orientation axes of the respective nets are orthogonal to each other. In the thermocompression bonding step 35, the vertical web and the horizontal web after the warp and weft are sequentially guided to between the mirror-shaped hot cylinder 35a and the mirror rollers 35b and 35c, and a nip pressure is applied. Thereby, the vertical net and the horizontal net are thermocompression bonded to each other and integrated. Further, the contact portions of the adjacent vertical web and the horizontal web are completely surface-to-face. The vertical net and the horizontal net integrated in this manner are wound in the winding step to form a wound body 36 of the warp and weft laminated nonwoven fabric.
以上述方式製造之強化支持層亦完全滿足與第1實施形態 相同的單位面積重量(5~13g/m2)、層構成比(20/60/20~30/40/30)、由懸臂法測得之抗彎曲性的平均值(50mm以下)之條件,藉此,能夠獲得同樣之效果。於該情形時,厚度亦薄於80μm,開口率亦高於50%即可。 The reinforcing support layer produced in the above manner also satisfies the same basis weight (5 to 13 g/m 2 ) and 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 measuring the average value of the bending resistance (50 mm or less). In this case, the thickness is also thinner than 80 μm, and the aperture ratio is also higher than 50%.
<變形例2> <Modification 2>
已說明了上述單軸定向體經緯積層有分叉網2與狹縫網3之情形,亦可積層2組平行地排列單軸定向帶所成之帶體而形成複合不織布。於該情形時,以一組的單軸定向帶的定向軸與另一組的單軸定向帶的定向軸相互正交之方式進行經緯積層。使用如下單軸定向帶,該單軸定向帶係使3層膜沿縱或橫方向單軸定向且進行裁斷而形成多層延伸帶之單軸定向帶,該3層膜與分叉網2及狹縫網3同樣地,於熱塑性樹脂層的兩面積層有熔點低於該熱塑性樹脂之第1、第2接著層(熱塑性樹脂)。 In the case where the above-mentioned uniaxially oriented warp and weft laminate has the split net 2 and the slit net 3, it is also possible to form two layers of parallel uniaxially oriented belts to form a composite nonwoven fabric. In this case, the warp and weft layers are formed in such a manner that the orientation axes of one set of the uniaxially oriented strips and the orientation axes of the other set of the uniaxially oriented strips are orthogonal to each other. A uniaxially oriented belt is used which aligns a three-layer film in a longitudinal direction or a transverse direction and cuts it to form a uniaxially oriented belt of a multi-layered stretch belt, the three-layer film and the split net 2 and the narrow Similarly to the sewn net 3, the two-layer layer of the thermoplastic resin layer has a melting point lower than that of the first and second subsequent layers (thermoplastic resin) of the thermoplastic resin.
如此,於積層2組平行地排列單軸定向帶所成之帶體之情形 時,亦完全滿足與第1實施形態相同的單位面積重量、層構成比、由懸臂法測得之抗彎曲性的平均值之條件,因此能夠獲得同樣的效果。當然,厚 度薄於80μm,開口率高於50%即可。 Thus, in the case where the two layers of the laminate are arranged in parallel, the strip formed by the uniaxially oriented belt is arranged. In the meantime, the same effects as the unit weight of the unit area, the layer constitution ratio, and the average value of the bending resistance measured by the cantilever method are satisfied. Therefore, the same effects can be obtained. Of course, thick The degree is thinner than 80 μm, and the aperture ratio is higher than 50%.
根據如上所述之構成之複合不織布,作為醫療一次性製品等與人體接觸之製品,其能夠提升柔軟性或柔韌度、手感。又,例如於用作止汗片、卸妝品、擦汗布等對人用抹布之情形時,亦能夠獲得同樣的效果。進而,於用作工場的擦油布、擦地布、廚房擦拭巾(kitchen towel)等對物用抹布之情形時,能夠進一步提升對於塵垢或油等附著物的捕捉性或抹除性。 According to the composite nonwoven fabric having the above configuration, it is possible to improve the softness, flexibility, and hand feeling as a product which is in contact with a human body such as a medical disposable product. Further, for example, when used as a rag for a person such as an antiperspirant tablet, a makeup remover, or a sweat jersey, the same effect can be obtained. Further, in the case of using a rag such as a rubbing cloth, a wiping cloth, or a kitchen towel as a factory, it is possible to further improve the catching property or the erasing property against deposits such as dust or oil.
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JPH0847994A (en) * | 1994-08-05 | 1996-02-20 | Nippon Petrochem Co Ltd | Lightweight ultra-strong sheet and production thereof |
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JPH11156986A (en) * | 1997-11-25 | 1999-06-15 | Nippon Petrochem Co Ltd | Flat reticular body and manufacture thereof |
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