TW201337061A - Nonwoven fabric and method of manufacturing the same - Google Patents
Nonwoven fabric and method of manufacturing the same Download PDFInfo
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本發明係有關於平面方向及厚度方向之透氣性良好,而且具有高吸水性與速乾性之不織布,以及製造該不織布之方法。 The present invention relates to a nonwoven fabric having good air permeability in a planar direction and a thickness direction, and having high water absorbability and quick-drying property, and a method of producing the nonwoven fabric.
不織布係使用於吸收性物品(例如生理用品及拋棄式紙尿褲)、清潔用品(例如抹布)、以及醫療用品(例如口罩)等之製品,該等製品係採用:具有適合於製品之用途或所使用部位等之性能的不織布。 Non-woven fabrics are used for articles such as absorbent articles (such as physiological products and disposable diapers), cleaning products (such as rags), and medical articles (such as masks), which are used for use or use suitable for products. Non-woven fabric for the performance of parts, etc.
例如,吸收性物品必須為不讓使用者產生異物感,在穿著時或使用時配合身體的動作伸縮之不織布。另外,拋棄式紙尿褲必須具備具有高伸縮性且具有伸長時不會斷裂的強度,並且皮膚接觸性及透氣性良好之不織布。 For example, the absorbent article must be a non-woven fabric that does not cause a foreign body sensation to the user, and that stretches and contracts with the movement of the body at the time of wearing or use. In addition, the disposable diaper must have a non-woven fabric which has high stretchability and has strength which does not break when stretched, and which is excellent in skin contact property and gas permeability.
以透氣性良好之不織布來說,專利文獻1中揭示有:具有第1層及與第1層相鄰接之第2層,且第1層及第2層係藉由既定圖案之接合部加以局部接合,在該接合部間使第1層形成三維的立體形狀,第2層係以呈現彈性體般特性之材料所構成,薄片整體呈現彈性體般特性並且具有透氣性的立體薄片材料。專利文獻1所述之立體薄片材料,係將構成第2層之纖維,以開始熱收縮之溫度以上進行熱處理,使第2層收縮,藉此呈現立體構造。 In the non-woven fabric having good gas permeability, Patent Document 1 discloses that the first layer and the second layer adjacent to the first layer are provided, and the first layer and the second layer are bonded by a joint portion of a predetermined pattern. In the partial joining, the first layer is formed into a three-dimensional three-dimensional shape between the joint portions, and the second layer is formed of a material exhibiting an elastomer-like property, and the sheet as a whole exhibits an elastomer-like property and has a gas permeable three-dimensional sheet material. In the three-dimensional sheet material described in Patent Document 1, the fibers constituting the second layer are heat-treated at a temperature higher than the temperature at which heat shrinkage is started, and the second layer is shrunk, thereby exhibiting a three-dimensional structure.
[專利文獻1]日本特開2002-187228號 [Patent Document 1] Japanese Patent Laid-Open No. 2002-187228
然而,專利文獻1所述之立體薄片材料,係使第2層收縮,藉此呈現立體構造,所以薄片材料在平面方向之透氣性雖然良好,但卻有厚度方向之透氣性較差之傾向。另外,專利文獻1所述之立體薄片材料係使第2層收縮,所以第2層之纖維密度高,容易阻礙伸縮性,而且未提及關於速乾性的部分。 However, the three-dimensional sheet material described in Patent Document 1 shrinks the second layer and exhibits a three-dimensional structure. Therefore, although the sheet material has good gas permeability in the planar direction, it tends to have poor gas permeability in the thickness direction. Further, since the three-dimensional sheet material described in Patent Document 1 shrinks the second layer, the fiber density of the second layer is high, and the stretchability is easily hindered, and the portion relating to the quick-drying property is not mentioned.
因此,本發明之目的在於提供:皮膚接觸性及伸縮性良好,平面方向及厚度方向之透氣性良好,而且具有高吸水性與速乾性的不織布;以及製造該不織布的方法。 Accordingly, an object of the present invention is to provide a nonwoven fabric which is excellent in skin contact property and stretchability, has good air permeability in a planar direction and a thickness direction, and has high water absorbability and quick-drying property, and a method of producing the nonwoven fabric.
本發明人為了解決上述課題致力於研究的結果,發現可藉由下述之不織布來解決上述課題,而完成本發明;該不織布係包含伸長性纖維與伸縮性纖維之不織布,其特徵為:上述不織布係具備:具有複數凸部及複數凹部的第1面,以及位於第1面之相反側的第2面;第1面之凸部的伸長性纖維之比率,比第1面之凹部的伸長性纖維之比率更高,且上述不織布被親水化劑被覆,或上述伸長性纖維及伸縮性纖維含有親水化劑,上述不織布係具有:在吸水 性試驗呈現10mm以上吸水高度的吸水性,以及在蒸散性試驗中呈現20質量%以上蒸散率的速乾性。 In order to solve the above problems, the inventors of the present invention have found that the above problems can be solved by the following non-woven fabric, and the nonwoven fabric comprises a nonwoven fabric of extensible fibers and stretchable fibers, and is characterized in that: The nonwoven fabric includes: a first surface having a plurality of convex portions and a plurality of concave portions; and a second surface located on a side opposite to the first surface; and a ratio of the elongating fibers of the convex portion of the first surface to an elongation of the concave portion of the first surface The ratio of the fibers is higher, and the nonwoven fabric is coated with a hydrophilizing agent, or the extensible fiber and the stretchable fiber contain a hydrophilizing agent, and the non-woven fabric has a water absorption property. The test showed a water absorption of a water absorption height of 10 mm or more, and a quick-drying property of an evapotranspiration rate of 20% by mass or more in the evapotranspiration test.
具體而言,本發明有關以下態樣。 In particular, the invention relates to the following aspects.
一種不織布,其係包含伸長性纖維與伸縮性纖維之不織布,其特徵為:上述不織布係具備:具有複數凸部及複數凹部的第1面,以及位於第1面之相反側的第2面;第1面之凸部的伸長性纖維之比率,比第1面之凹部的伸長性纖維之比率更高,且上述不織布被親水化劑被覆,或上述伸長性纖維及伸縮性纖維含有親水化劑,上述不織布係具有:在吸水性試驗呈現10mm以上吸水高度的吸水性,以及在蒸散性試驗中呈現20質量%以上蒸散率的速乾性。 A non-woven fabric comprising: a non-woven fabric of an extensible fiber and a stretchable fiber, wherein the nonwoven fabric comprises: a first surface having a plurality of convex portions and a plurality of concave portions; and a second surface located on a side opposite to the first surface; The ratio of the elongating fibers in the convex portion of the first surface is higher than the ratio of the elongating fibers in the concave portion of the first surface, and the non-woven fabric is coated with a hydrophilizing agent, or the elongating fiber and the elastic fiber contain a hydrophilizing agent. The non-woven fabric has a water absorbing property of a water absorption height of 10 mm or more in a water absorption test, and a quick-drying property of exhibiting an evapotranspiration rate of 20% by mass or more in a transpiration test.
如態樣1所述之不織布,其中,第2面係具有複數凸部及凹部,且第2面之凸部的伸長性纖維之比率,比第2面之凹部的伸長性纖維之比率更高。 The non-woven fabric according to aspect 1, wherein the second surface has a plurality of convex portions and concave portions, and the ratio of the elongating fibers of the convex portions of the second surface is higher than the ratio of the elongating fibers of the concave portions of the second surface. .
如態樣2所述之不織布,其中,具有:將第1面之凹部與第2面之凹部連結的一個或複數個的開孔部。 The non-woven fabric according to aspect 2, comprising: one or a plurality of opening portions that connect the concave portion of the first surface to the concave portion of the second surface.
如態樣1~3項中任一項所述之不織布,其中,上述不織布被親水化劑被覆並且上述伸長性纖維含有親水化劑。 The non-woven fabric according to any one of the aspects 1 to 3, wherein the non-woven fabric is coated with a hydrophilizing agent and the extensible fiber contains a hydrophilizing agent.
如態樣1~4項中任一項所述之不織布,其中,在吸水性試驗之吸水高度為18mm以上。 The non-woven fabric according to any one of the aspects 1 to 4, wherein the water absorption height in the water absorption test is 18 mm or more.
如態樣1~5項中任一項所述之不織布,其中,蒸散性試驗之蒸散率為40質量%以上。 The non-woven fabric according to any one of the aspects 1 to 5, wherein the evapotranspiration test has an evapotranspiration ratio of 40% by mass or more.
如態樣1~6項中任一項所述之不織布,其中,厚度方向之透氣度為400m3/m2/分以上,平面方向之透氣度為5m3/m2/分以上。 The non-woven fabric according to any one of the aspects 1 to 6, wherein the air permeability in the thickness direction is 400 m 3 /m 2 /min or more, and the air permeability in the planar direction is 5 m 3 /m 2 /min or more.
如態樣1~7項中任一項所述之不織布,其中,上述伸長性纖維之材料係由聚烯烴、聚苯乙烯、聚酯、聚醯胺、聚氨酯、聚乳酸、及該等之組合所構成的群組中選擇。 The non-woven fabric according to any one of the aspects 1 to 7, wherein the material of the extensible fiber is made of polyolefin, polystyrene, polyester, polyamide, polyurethane, polylactic acid, and the like. Choose among the groups that make up.
如態樣1~8項中任一項所述之不織布,其中,上述伸縮性纖維之材料係由聚氨酯系彈性體、聚苯乙烯系彈性體、聚烯烴系彈性體、聚醯胺系彈性體、聚酯系彈性體、及該等之組合所構成的群組中選擇。 The non-woven fabric according to any one of the aspects 1 to 8, wherein the material of the stretchable fiber is a polyurethane elastomer, a polystyrene elastomer, a polyolefin elastomer, or a polyamide elastomer. Selected from the group consisting of polyester elastomers and combinations of these.
如態樣1~9項中任一項所述之不織布,其中,上述親水化劑係由陰離子系親水化劑、陽離子系親水化劑、非離子系親水化劑、以及該等之組合所構成的群組中選擇。 The non-woven fabric according to any one of the aspects 1 to 9, wherein the hydrophilizing agent is composed of an anionic hydrophilizing agent, a cationic hydrophilizing agent, a nonionic hydrophilizing agent, and the like. Select from the group.
一種不織布之製造方法,其係用以製造如態樣1~10項中任一項所述之不織布,該方法係包含:準備包含伸長性纖維與伸縮性纖維之待處理的不織布的步驟;將上述包含伸長性纖維與伸縮性纖維之待處理的不織布,以形成有具有高延伸範圍與低延伸範圍的不織布的方式不均勻地延伸的步驟;將含有親水化劑溶液,塗布在上述具有高延伸範圍與低延伸範圍的不織布的步驟;以及,將塗布有親水化劑,且具有高延伸範圍與低延伸範圍的不織布,配置在支撐體上,並將噴出的流體加以噴附,藉此進行處理來形成如態樣1~7項中任一項所述之不織布的步驟。 A non-woven fabric manufacturing method for manufacturing the non-woven fabric according to any one of the aspects 1 to 10, the method comprising: preparing a non-woven fabric to be treated comprising an extensible fiber and a stretchable fiber; The above-mentioned non-woven fabric containing the extensible fiber and the stretchable fiber is unevenly extended in such a manner as to form a non-woven fabric having a high elongation range and a low elongation range; and the solution containing the hydrophilizing agent is coated on the above-mentioned having a high elongation a step of non-woven fabric having a range and a low elongation range; and a non-woven fabric coated with a hydrophilizing agent and having a high elongation range and a low elongation range, disposed on the support body, and sprayed by the sprayed fluid, thereby being processed The step of forming the non-woven fabric according to any one of the aspects 1 to 7.
如態樣11所述之方法,其中,上述不均勻地延伸之步驟係藉由以下方式進行:使用具有與搬運方向正交之旋轉軸線的一對齒輪輥,使配置在該等齒輪輥之外周面的複數齒一邊相互咬合一邊旋轉,在該一對齒輪輥之間隙使上述包含伸長性纖維與伸縮性纖維之不織布通過。 The method of aspect 11, wherein the step of unevenly extending is performed by using a pair of gear rolls having an axis of rotation orthogonal to the conveying direction to be disposed outside the gear rolls The plurality of teeth of the surface are rotated while being engaged with each other, and the nonwoven fabric containing the extensible fibers and the stretchable fibers are passed through the gap between the pair of gear rolls.
如態樣11或12所述之方法,其中,上述親水化劑溶液係親水化劑水溶液。 The method according to aspect 11 or 12, wherein the hydrophilizing agent solution is an aqueous solution of a hydrophilizing agent.
如態樣11~13項中任一項所述之方法,其中,上述流體係由空氣、水蒸氣及水所構成的群組中選擇。 The method according to any one of aspects 11 to 13, wherein the flow system is selected from the group consisting of air, water vapor, and water.
本發明之包含伸長性纖維與伸縮性纖維之不織布,係平面方向及厚度方向之透氣性良好,而且具有高吸水性與速乾性。 The non-woven fabric comprising the extensible fiber and the stretchable fiber of the present invention has good gas permeability in the planar direction and the thickness direction, and has high water absorbability and quick-drying property.
本發明之包含伸長性纖維與伸縮性纖維之不織布,皮膚接觸性及伸縮性同樣良好。 The non-woven fabric containing the extensible fiber and the stretchable fiber of the present invention is also excellent in skin contact property and stretchability.
以下針對本發明之包含伸長性纖維與伸縮性纖維之不織布,以及製造該不織布之方法進行詳細說明。 Hereinafter, the nonwoven fabric comprising the extensible fiber and the stretchable fiber of the present invention, and a method of producing the nonwoven fabric will be described in detail.
第1圖係本發明之包含伸長性纖維與伸縮性纖維之不織布的實施形態之一的示意圖。第1圖所示之本發明之包含伸長性纖維與伸縮性纖維的不織布1,係在第1面2具有複數凸部3及複數凹部4。在第1圖所示之本發明之包含伸長性纖維與伸縮性纖維的不織布1,凸部3含伸長性纖維EX較多,而且凹部4含伸縮性纖維EL較多,因而凸部3之伸長性纖維的比率,比凹部4之伸長性纖維的比率更高。另外,在第1圖所示之包含伸長性纖維與伸縮性纖維的不織布1,凸部3及凹部4係分別與第1方向A平行,交互地配置於與第1方向A正交之方向。 Fig. 1 is a schematic view showing one embodiment of a non-woven fabric comprising an extensible fiber and a stretchable fiber of the present invention. The non-woven fabric 1 including the extensible fiber and the stretchable fiber of the present invention shown in Fig. 1 has a plurality of convex portions 3 and a plurality of concave portions 4 on the first surface 2. In the nonwoven fabric 1 including the extensible fiber and the stretchable fiber of the present invention shown in Fig. 1, the convex portion 3 contains a large amount of the extensible fiber EX, and the concave portion 4 contains a large amount of the stretchable fiber EL, so that the elongation of the convex portion 3 is increased. The ratio of the fibers is higher than the ratio of the extensible fibers of the recess 4. Further, in the nonwoven fabric 1 including the extensible fiber and the stretchable fiber shown in Fig. 1, the convex portion 3 and the concave portion 4 are parallel to the first direction A, and are alternately arranged in a direction orthogonal to the first direction A.
此外,以下將本發明之包含伸長性纖維與伸縮性纖維之不織布,有簡稱為「本發明之不織布」的情況。 In addition, the nonwoven fabric containing the extensible fiber and the stretchable fiber of the present invention will be referred to as "non-woven fabric of the present invention" hereinafter.
於第1圖所示之實施形態,在凸部3,伸長性纖維EX具有沿著第1方向A之配向性,而且在凹部4,伸縮性纖維EL不存在配向性。另外,在第1圖所示之實施形態雖未圖示,但伸長性纖維EX係配向於不織布1之厚度方向。另外,在凸部3,與其他場所比較,有纖維之密集度較高的傾向。針對朝厚度方向之配向性、及纖維之密集度,與本發明之不織布之製造方法相關聯進行說明。 In the embodiment shown in Fig. 1, in the convex portion 3, the extensible fiber EX has an orientation along the first direction A, and in the concave portion 4, the stretchable fiber EL does not have an alignment property. Further, although the embodiment shown in Fig. 1 is not shown, the extensible fiber EX is oriented in the thickness direction of the nonwoven fabric 1. Further, in the convex portion 3, the density of fibers tends to be higher than in other places. The alignment in the thickness direction and the density of the fibers will be described in connection with the method for producing the nonwoven fabric of the present invention.
此外,第1圖未表示親水化劑。 Further, Fig. 1 does not show a hydrophilizing agent.
在此,所謂「伸長性纖維之比率」係指在該場所中,相對於全部纖維之伸長性纖維的質量比。該比率只要為能夠估計伸長性纖維之質量比的方法即可,沒有特別限制,可藉由任意方法進行測定,但作為舉例,可舉出以下之溶劑法為例。 Here, the "ratio of the extensible fiber" means the mass ratio of the extensible fiber with respect to all the fibers in this place. The ratio is not particularly limited as long as it can estimate the mass ratio of the extensible fibers, and can be measured by any method. However, the following solvent method is exemplified as an example.
(1)從本發明之不織布採取第1面之凸部的纖維,測定其質量。 (1) The fiber of the convex portion of the first surface was taken from the nonwoven fabric of the present invention, and the mass thereof was measured.
(2)使採取之纖維溶解於能夠將伸長性纖維或伸縮性纖維之其中一方溶解的溶劑,並靜置固定時間,例如30分。 (2) The obtained fiber is dissolved in a solvent capable of dissolving one of the extensible fiber or the stretchable fiber, and allowed to stand for a fixed period of time, for example, 30 minutes.
(3)過濾溶液,依照須要將殘留纖維洗淨,然後使殘留纖維乾燥。 (3) The solution is filtered, and the residual fibers are washed as necessary, and then the residual fibers are dried.
(4)測定殘留纖維之乾燥質量,並算出纖維之質量比。 (4) The dry mass of the residual fiber was measured, and the mass ratio of the fiber was calculated.
上述溶劑可以適當加以選擇,但在例如伸長性纖維為聚烯烴並且伸縮性纖維為聚氨酯系彈性體之場合中,能夠選擇聚氨酯系彈性體為可溶並且聚烯烴為不溶的二甲基乙醯胺、二甲基甲醯胺等。另外,在伸縮性纖維為聚苯乙烯系彈性體之場合中,作為可溶之溶劑可舉出甲苯、二甲苯等溶劑為例。 The solvent may be appropriately selected. For example, when the extensible fiber is a polyolefin and the stretchable fiber is a polyurethane-based elastomer, the urethane-based elastomer can be selected to be soluble and the polyolefin is insoluble dimethylacetamide. , dimethylformamide, and the like. In the case where the stretchable fiber is a polystyrene-based elastomer, examples of the solvent that can be dissolved include a solvent such as toluene or xylene.
針對第1面之凹部,以及所期望之第2面的凸部及凹部,也能夠同樣地測定伸長性纖維之比率。 The ratio of the elongating fibers can also be measured in the same manner for the concave portion of the first surface and the convex portion and the concave portion of the desired second surface.
上述用以測定伸長性纖維之比率的其他方法,可舉出以下之染色法為例。 The other method for measuring the ratio of the extensible fibers described above is exemplified by the following dyeing method.
(1)將本發明之不織布,以對於伸長性纖維之染色性與對於伸縮性纖維之染色性不同的染料加以染色。 (1) The non-woven fabric of the present invention is dyed with a dye having different dyeability to the extensible fiber and dyeability to the stretchable fiber.
(2)使用光學顯微鏡等,對第1面之凸部的投影影像進行攝影。 (2) The projection image of the convex portion of the first surface is imaged using an optical microscope or the like.
(3)從上述影像藉由目視對伸長性纖維之比率進行評估,或將上述影像以區分伸長性纖維與伸縮性纖維的方式加以二值化,對伸長性纖維之比率進行計算。 (3) The ratio of the extensible fibers is visually evaluated from the above image, or the image is binarized to distinguish the extensible fibers from the stretchable fibers, and the ratio of the extensible fibers is calculated.
上述染色法係適用在不適合上述溶劑法之不織布,測定出伸長性纖維之比率。 The above dyeing method is applied to a nonwoven fabric which is not suitable for the above solvent method, and the ratio of the extensible fibers is measured.
針對第1面之凹部,以及所期望之第2面的凸部及凹部,也能夠同樣地測定伸長性纖維之比率。 The ratio of the elongating fibers can also be measured in the same manner for the concave portion of the first surface and the convex portion and the concave portion of the desired second surface.
此外,在上述染色法,藉由二值化所得到之比率,係指投影影像中之面積比,但該面積比大致相當於體積比,因而乘以纖維之密度,可藉此估計質量比。 Further, in the above dyeing method, the ratio obtained by binarization refers to the area ratio in the projected image, but the area ratio is approximately equivalent to the volume ratio, and thus the density of the fiber is multiplied, whereby the mass ratio can be estimated.
本發明之效果,特別是由皮膚接觸性及伸縮性兼具之觀點來看,第1面之凸部的伸長性纖維之比率,比第1面之凹部的伸長性纖維之比率,至少高1質量%為佳,至少高2質量%較佳,至少高3質量%更佳,而且至少高5質量%為最佳。 The effect of the present invention, in particular, from the viewpoint of both skin contact property and stretchability, the ratio of the elongating fibers of the convex portion of the first surface is at least 1 higher than the ratio of the elongating fibers of the concave portion of the first surface. The mass% is preferably at least 2% by mass, more preferably at least 3% by mass, and at least 5% by mass is most preferred.
如第1圖所示般,本發明之不織布係第1面之凸部的伸長性纖維之比率,比第1面之凹部的伸長性纖維之比率更高,因而皮膚接觸性良好且伸縮性良好。其理由係如下所述。 As shown in Fig. 1, in the non-woven fabric of the present invention, the ratio of the elongating fibers of the convex portion of the first surface is higher than the ratio of the elongating fibers of the concave portion of the first surface, so that the skin contact property is good and the stretchability is good. . The reason is as follows.
一般而言,伸縮性纖維係賦予伸縮性於不織布的構成 要素,但有著具有黏著性,摩擦性高等在皮膚接觸性較差缺點,而伸長性纖維則幾乎不具有伸縮性,但皮膚接觸性良好。本發明之不織布,所具有之特徵係:皮膚接觸性良好之伸長性纖維被配置在與人接觸的凸部,然後,皮膚接觸性較差之伸縮性纖維,被大致均勻地配置在不易接觸到人的凹部及不織布的凸部內,因而具有伸縮性同時皮膚接觸性良好。 In general, a stretchable fiber system imparts stretchability to a nonwoven fabric. The factor is that it has the adhesiveness, the high frictional property is poor in skin contact, and the extensible fiber has almost no stretchability, but the skin contact property is good. The non-woven fabric of the present invention is characterized in that the extensible fibers having good skin contact properties are disposed on the convex portions in contact with the human body, and then the elastic fibers having poor skin contact properties are disposed substantially uniformly in contact with the human body. In the concave portion and the non-woven convex portion, it has stretchability and good skin contact property.
如第1圖所示般,本發明之不織布係厚度較薄,在第1面具有複數厚度方向之透氣阻力少的凹部,因而與不具有凹部之不織布比較,不織布之厚度方向透氣性良好。第1圖所示之本發明之不織布,另外在第1面具有複數成為平面方向之空氣通道的凹部,因而不織布之平面方向的透氣性良好。 As shown in Fig. 1, the non-woven fabric of the present invention has a small thickness and has a concave portion having a small air resistance in a plurality of thickness directions on the first surface. Therefore, the non-woven fabric has a good air permeability in a thickness direction as compared with a non-woven fabric having no concave portion. In the non-woven fabric of the present invention shown in Fig. 1, the first surface has a plurality of concave portions which are air passages in the planar direction, and therefore the air permeability in the planar direction of the non-woven fabric is good.
在本說明書,「伸縮性纖維」係指可彈性伸長之纖維。更具體而言係指上述伸縮性纖維,具有比在形成時及假設之使用時所施加應力更大的彈性極限,在形成時及假設之使用時所施加應力之範圍內可彈性地伸長之纖維。作為上述伸縮性纖維之材料,可舉出例如,聚氨酯系彈性體、聚苯乙烯系彈性體、聚烯烴系彈性體、聚醯胺系彈性體、聚酯系彈性體、及該等之組合為例。作為上述伸縮性纖維,由伸長後變形較少、耐熱性較高等觀點來看,較佳為聚氨酯系彈性體。 In the present specification, "stretchable fiber" means a fiber which is elastically extensible. More specifically, it refers to the above-mentioned stretchable fiber, which has an elastic limit which is greater than the stress applied at the time of formation and the assumed use, and the fiber which is elastically stretchable in the range of the applied stress at the time of formation and the assumed use. . Examples of the material of the stretchable fiber include a polyurethane-based elastomer, a polystyrene-based elastomer, a polyolefin-based elastomer, a polyamide-based elastomer, a polyester-based elastomer, and the like. example. The stretchable fiber is preferably a polyurethane-based elastomer from the viewpoint of less deformation after stretching and high heat resistance.
上述伸縮性纖維之纖維直徑較佳為在2~50μm之範圍內,而且更佳為在15~30μm之範圍內。 The fiber diameter of the above-mentioned stretchable fiber is preferably in the range of 2 to 50 μm, and more preferably in the range of 15 to 30 μm.
在本發明之不織布,為了達成高吸水性與速乾性,伸縮性纖維含有親水化劑,較佳為具有親水性。作為含有親水化劑的伸縮性纖維,舉出例如在伸縮性纖維之材料混合親水化劑,接著藉著紡絲形成之伸縮性纖維,即所謂摻入親水化劑之伸縮性纖維為例。 In the nonwoven fabric of the present invention, in order to achieve high water absorbability and quick-drying property, the stretchable fiber contains a hydrophilizing agent, and is preferably hydrophilic. The stretchable fiber containing a hydrophilizing agent is exemplified by, for example, a material in which a hydrophilizing agent is mixed with a material of a stretchable fiber, and a stretchable fiber formed by spinning, that is, a stretchable fiber in which a hydrophilizing agent is incorporated.
上述伸縮性纖維所能含有之親水化劑,可與被覆後述之不織布的親水化劑相同或不同皆可。 The hydrophilizing agent which can be contained in the above-mentioned stretchable fiber may be the same as or different from the hydrophilizing agent which coats the nonwoven fabric described later.
在本說明書中「伸長性纖維」係指彈性極限比上述伸縮性纖維之彈性極限更小的纖維。更具體而言,上述伸長性纖維係指具有形成時比施加之應力更小的彈性極限,能藉由形成時施加之應力而塑性變形之纖維。上述伸長性纖維藉由塑性變形,而變細並且變長。此外,在本說明書有將能藉由形成時施加之應力而塑性變形的伸長性纖維,稱為「伸長之伸長性纖維」的情況。作為伸長之伸長性纖維的例子,可舉出具有均勻之直徑或具有不均勻之直徑者,例如具有部分較細的部分(頸縮部)者為例。 In the present specification, "elongated fiber" means a fiber having an elastic limit smaller than the elastic limit of the above-mentioned stretchable fiber. More specifically, the above-mentioned extensible fiber means a fiber which has an elastic limit which is smaller than the applied stress at the time of formation, and can be plastically deformed by the stress applied at the time of formation. The above extensible fibers are thinned and lengthened by plastic deformation. Further, in the present specification, there is a case where an extensible fiber which can be plastically deformed by a stress applied at the time of formation is referred to as "elongated extensible fiber". Examples of the elongated extensible fiber include those having a uniform diameter or a non-uniform diameter, for example, a portion having a relatively thin portion (necked portion).
作為上述伸長性纖維之材料的例子,舉出聚烯烴、例如,聚乙烯及聚丙烯、聚苯乙烯、聚酯、聚醯胺、聚氨酯、聚乳酸、或由該等之組合組成的纖維為例。上述伸長性纖維亦可為芯鞘型纖維、複合型纖維等之複合纖維。另外,上述伸長性纖維亦可為本質上具有親水性之纖維,例如天然系及/或半天然系之纖維。 Examples of the material of the extensible fiber include polyolefin, for example, polyethylene and polypropylene, polystyrene, polyester, polyamide, polyurethane, polylactic acid, or a fiber composed of the combination thereof. . The extensible fiber may be a composite fiber such as a core-sheath fiber or a composite fiber. Further, the extensible fiber may be a fiber which is hydrophilic in nature, such as a natural and/or semi-natural fiber.
上述伸長性纖維由結晶性較低,伸度較高等觀點來看,較佳為包含聚丙烯及聚乙烯之纖維。 The extensible fiber is preferably a fiber containing polypropylene and polyethylene from the viewpoints of low crystallinity and high elongation.
上述伸長性纖維之纖維直徑較佳為在約1~約40μm之範圍內,而更佳為在約5~約25μm之範圍內。另外,上述伸長性纖維之纖維直徑較佳為比上述伸縮性纖維之纖維直徑更細。其原因係能夠賦予本發明之不織布,柔軟性、體積更大、隱蔽性等。 The fiber diameter of the above extensible fiber is preferably in the range of from about 1 to about 40 μm, and more preferably in the range of from about 5 to about 25 μm. Further, the fiber diameter of the extensible fiber is preferably smaller than the fiber diameter of the stretchable fiber. The reason for this is that the nonwoven fabric of the present invention can be imparted with flexibility, bulkiness, concealability and the like.
在本發明之不織布,為了達成高吸水性與速乾性,較佳為伸長性纖維含有親水化劑,具有親水性。作為含有親水化劑之伸長性纖維,舉出例如伸長性纖維之材料混合親水化劑,接著藉由紡絲所形成之伸縮性纖維,所謂摻入親水化劑之纖維為例。 In the nonwoven fabric of the present invention, in order to achieve high water absorbability and quick-drying property, it is preferred that the extensible fiber contains a hydrophilizing agent and has hydrophilicity. Examples of the extensible fiber containing a hydrophilizing agent include a material in which a hydrophilizing agent is mixed with a material of an extensible fiber, and then a stretchable fiber formed by spinning, a fiber in which a hydrophilizing agent is incorporated, is exemplified.
本發明之不織布,係能夠以親水化劑被覆,但本發明之不織布中之被覆有親水化劑的分布,本發明之不織布只要具有既定之吸水性與速乾性沒有特別限制。例如,在上述親水化劑藉由浸塗法塗布於不織布的場合,一般係在不織布整體,更具體而言係以在各纖維之表面用親水化劑加以被覆的方式分布有親水化劑,在上述親水化劑藉由噴塗法塗布於不織布的場合,一般係在不織布表面分布較多親水化劑,而且在上述親水化劑藉由棒塗法塗布於不織布的場合,一般而言比起被塗布面之凹部,在凸部分布更多親水化劑。 The non-woven fabric of the present invention can be coated with a hydrophilizing agent. However, in the non-woven fabric of the present invention, the non-woven fabric is coated with a hydrophilizing agent, and the non-woven fabric of the present invention is not particularly limited as long as it has a predetermined water absorbability and quick-drying property. For example, when the hydrophilizing agent is applied to a nonwoven fabric by dip coating, it is generally distributed on the entire nonwoven fabric, and more specifically, a hydrophilizing agent is distributed so as to be coated with a hydrophilizing agent on the surface of each fiber. When the hydrophilizing agent is applied to a non-woven fabric by a spray coating method, generally, a hydrophilizing agent is distributed on the surface of the non-woven fabric, and when the hydrophilizing agent is applied to the non-woven fabric by a bar coating method, it is generally coated. The concave portion of the surface is provided with more hydrophilizing agent in the convex portion.
作為可被覆在不織布之親水化劑,以及伸長性纖維及伸縮性纖維可含有之親水化劑,若為一般在該技術領域被使用作為親水化劑者,可無特別制限地採用,例如,舉出陰離子系親水化劑、陽離子系親水化劑、非離子系親水化 劑等、及該等組合為例,由耐熱性較高之觀點而言較佳為非離子系親水化劑。 The hydrophilizing agent which can be coated on the non-woven fabric, and the hydrophilizing agent which can be contained in the extensible fiber and the stretchable fiber can be used without any particular limitation if it is generally used as a hydrophilizing agent in the technical field, for example, Anionic hydrophilizing agent, cationic hydrophilizing agent, nonionic hydrophilization Examples of such agents and the like are preferably nonionic hydrophilizing agents from the viewpoint of high heat resistance.
以親水化劑被覆於不織布之場合,上述親水化劑在不織布上的量,較佳為被覆約0.01~約0.5g/m2之基重,更佳為約0.03~約0.3g/m2,而更佳為被覆約0.05~約0.1g/m2之基重。上述基重低於約0.01g/m2時,親水化度不足,有水接觸角變高,吸水性及速乾性不足的傾向,而上述基重高於約0.5g/m2時,伸縮性纖維及伸長生鮮被親水化劑固定,有伸縮性、柔軟性等降低之傾向。 When the hydrophilizing agent is coated on the nonwoven fabric, the amount of the hydrophilizing agent on the nonwoven fabric is preferably from about 0.01 to about 0.5 g/m 2 , more preferably from about 0.03 to about 0.3 g/m 2 . More preferably, it is coated to a basis weight of from about 0.05 to about 0.1 g/m 2 . When the basis weight is less than about 0.01 g/m 2 , the degree of hydrophilization is insufficient, the water contact angle is high, and the water absorbability and the quick-drying property tend to be insufficient, and when the basis weight is higher than about 0.5 g/m 2 , the stretchability is high. The fiber and the elongated fresh product are fixed by the hydrophilizing agent, and tend to have reduced flexibility and flexibility.
在伸長性纖維及伸縮性纖維含有親水化劑之場合,上述親水化劑之量相對於纖維之質量,以較佳為約0.05~約10.0質量%,更佳為約0.1~約7.0質量%,而且更佳為約0.2~約5.0質量%之比例含有。上述比例低於約0.05質量%時,親水化度不足,有水接觸角變高,吸水性及速乾性不足的傾向,而且上述比例高於約10.0質量%時,有伸長性纖維及伸縮性纖維之物性降低的情況。 In the case where the extensible fiber and the stretchable fiber contain a hydrophilizing agent, the amount of the hydrophilizing agent is preferably from about 0.05 to about 10.0% by mass, more preferably from about 0.1 to about 7.0% by mass, based on the mass of the fiber. Further, it is preferably contained in a ratio of from about 0.2 to about 5.0% by mass. When the ratio is less than about 0.05% by mass, the degree of hydrophilization is insufficient, the water contact angle becomes high, the water absorbability and the quick-drying property tend to be insufficient, and when the ratio is more than about 10.0% by mass, the extensible fiber and the stretchable fiber are present. The situation in which the physical properties are lowered.
在第1圖所示之本發明之包含伸長性纖維與伸縮性纖維的不織布1,凸部3及凹部4分別與第1方向A平行,交互地配置於與第1方向A正交之方向,但在本發明之不織布,第1面之複數凸部及複數凹部的圖案沒有特別限制,本發明之不織布,係藉由後述之製造方法等,可在第1面形成有具有預先決定之圖型的複數凸部及複數凹部。 In the nonwoven fabric 1 including the extensible fiber and the stretchable fiber of the present invention shown in Fig. 1, the convex portion 3 and the concave portion 4 are parallel to the first direction A, and are alternately arranged in the direction orthogonal to the first direction A. However, in the nonwoven fabric of the present invention, the pattern of the plurality of convex portions and the plurality of concave portions of the first surface is not particularly limited, and the nonwoven fabric of the present invention can have a predetermined pattern formed on the first surface by a manufacturing method or the like described later. The plurality of convex portions and the plurality of concave portions.
另外,在第1圖表示有第1面相反側之第2面為平面的實施形態,但作為本發明之其他實施形態,舉出在第2 面存在有凹凸之實施形態為例(與第2圖相關進行詳細說明)。 In addition, although the first figure shows an embodiment in which the second surface on the opposite side of the first surface is a flat surface, another embodiment of the present invention is described in the second aspect. An embodiment in which irregularities are present on the surface is taken as an example (described in detail in connection with Fig. 2).
此外,在第2面為平面之場合,具有第2面與其他不織布進行接著時接著性良好之優點。 Further, when the second surface is a flat surface, there is an advantage that the second surface is excellent in adhesion to other non-woven fabrics.
並且,雖然在第1圖表示,在凸部3中伸長性纖維EX具有沿著第1方向A之配向性之實施形態,但在本發明之不織布,伸長性纖維不特別具有配向性亦可。 Further, although the first embodiment shows an embodiment in which the extensible fiber EX has an orientation along the first direction A in the convex portion 3, the extensible fiber may not particularly have an alignment property in the nonwoven fabric of the present invention.
第2圖係本發明之不織布之其他實施形態的示意圖。第2圖所示之本發明之包含伸長性纖維與伸縮性纖維之不織布1,在第1面2之相反側具有第2面5,而且第2面5係具有複數凸部6及複數凹部7。在如第2圖所示之實施形態,第1面2係與第1圖所示之第1面2相同。 Fig. 2 is a schematic view showing another embodiment of the nonwoven fabric of the present invention. The non-woven fabric 1 including the extensible fiber and the stretchable fiber of the present invention shown in Fig. 2 has the second surface 5 on the side opposite to the first surface 2, and the second surface 5 has a plurality of convex portions 6 and a plurality of concave portions 7 . In the embodiment shown in Fig. 2, the first surface 2 is the same as the first surface 2 shown in Fig. 1.
此外,在第2圖未表示親水化劑。 Further, the hydrophilizing agent is not shown in Fig. 2 .
在第2圖所示之本發明之包含伸長性纖維與伸縮性纖維之不織布1,凸部6含伸長性纖維EX較多,而且凹部7含伸縮性纖維EL較多,因而凸部6之伸長性纖維的比率,比凹部7之伸長性纖維的比率更高。另外,在第2圖所示之本發明之包含伸長性纖維與伸縮性纖維之不織布1,凸部6及凹部7,係分別與第2方向B平行,交互地配置於與第2方向B正交之方向。並且,在第2圖所示之本發明之包含伸長性纖維與伸縮性纖維之不織布1,第1方向A與第2方向B為正交。此外,在如第2圖所示之實施形態,凸部6中之伸長性纖維EX及凹部7中之伸縮性纖維EL不具有配向性。 In the nonwoven fabric 1 including the extensible fiber and the stretchable fiber of the present invention shown in Fig. 2, the convex portion 6 contains a large amount of the extensible fiber EX, and the concave portion 7 contains a large amount of the stretchable fiber EL, so that the convex portion 6 is elongated. The ratio of the fibers is higher than the ratio of the extensible fibers of the recess 7. Further, in the non-woven fabric 1 including the extensible fiber and the stretchable fiber of the present invention shown in Fig. 2, the convex portion 6 and the concave portion 7 are respectively parallel to the second direction B, and are alternately arranged in the second direction B. The direction of the exchange. Further, in the nonwoven fabric 1 including the extensible fiber and the stretchable fiber of the present invention shown in Fig. 2, the first direction A and the second direction B are orthogonal to each other. Further, in the embodiment shown in Fig. 2, the stretchable fibers EX in the convex portion 6 and the stretchable fibers EL in the concave portion 7 do not have an alignment property.
如第2圖所示般,本發明之不織布係第2面之凸部的伸長性纖維之比率,比第2面之凹部的伸長性纖維之比率更高,因而與第1面同樣地皮膚接觸性良好且伸縮性良好。 As shown in Fig. 2, the ratio of the elongating fibers of the non-woven fabric of the second surface of the present invention is higher than the ratio of the elongating fibers of the concave portion of the second surface, so that the skin contact is the same as that of the first surface. Good sex and good flexibility.
本發明之效果,特別是由皮膚接觸性及伸縮性兼具之觀點來看,第2面之凸部的伸長性纖維之比率,比第2面之凹部的伸長性纖維之比率至少高2質量%為佳,較佳為至少高4質量%,更佳為至少高6質量%,而且最佳為至少高8質量%。 The effect of the present invention is particularly that the ratio of the elongating fibers of the convex portion of the second surface is at least 2 times higher than the ratio of the elongating fibers of the concave portion of the second surface from the viewpoint of the skin contact property and the stretchability. % is preferably, preferably at least 4% by mass, more preferably at least 6 % by mass, and most preferably at least 8 % by mass.
此外,第2面之伸長性纖維的比率係與第1面之場合相同,能夠藉由溶劑法、染色法等進行評估。 Further, the ratio of the elongating fibers of the second surface is the same as that of the first surface, and can be evaluated by a solvent method, a dyeing method, or the like.
如第2圖所示般,本發明之不織布另外在第1面及第2面具有厚度薄,且厚度方向之透氣阻力少的凹部,因而不織布之厚度方向透氣性良好,而且在第1面及第2面具有成為平面方向之空氣通道的凹部,因而不織布之平面方向,特別是第1方向及第2方向之透氣性良好。 As shown in Fig. 2, the non-woven fabric of the present invention has a concave portion having a small thickness and a small air permeability resistance in the thickness direction on the first surface and the second surface. Therefore, the non-woven fabric has good air permeability in the thickness direction, and the first surface and the first surface are Since the second surface has a concave portion that serves as an air passage in the planar direction, the air permeability of the non-woven fabric, particularly the first direction and the second direction, is good.
在第2圖所示之本發明之包含伸長性纖維與伸縮性纖維之不織布1,複數凸部3及複數凹部4係分別與第1方向A平行,交互地配置於與第1方向A正交之方向,但在本發明之不織布,第1面之複數凸部及複數凹部的圖案沒有特別限定。 In the nonwoven fabric 1 including the extensible fiber and the stretchable fiber of the present invention shown in Fig. 2, the plurality of convex portions 3 and the plurality of concave portions 4 are parallel to the first direction A, and are alternately arranged orthogonally to the first direction A. In the non-woven fabric of the present invention, the pattern of the plurality of convex portions and the plurality of concave portions on the first surface is not particularly limited.
另外,在第2圖所示之本發明之包含伸長性纖維與伸縮性纖維之不織布1,凸部6及凹部7係分別與第2方向B平行,交互地配置於與第2方向B正交之方向,但在本 發明之不織布,第2面之複數凸部及複數凹部的圖案等沒有特別限制,本發明之不織布,係藉由後述之製造方法等,可在第2面形成有具有預先決定之圖型的複數凸部及複數凹部。 Further, in the nonwoven fabric 1 including the extensible fiber and the stretchable fiber of the present invention shown in Fig. 2, the convex portion 6 and the concave portion 7 are respectively parallel to the second direction B, and are alternately arranged orthogonally to the second direction B. Direction, but in this In the non-woven fabric of the invention, the pattern of the plurality of convex portions and the plurality of concave portions of the second surface is not particularly limited, and the nonwoven fabric of the present invention can be formed with a predetermined pattern on the second surface by a manufacturing method or the like described later. a convex portion and a plurality of concave portions.
並且,在如第2圖所示之實施形態,凸部6之伸長性纖維EX的配向性,及凹部7之伸縮性纖維EL的配向性並沒有特別存在,但本發明之不織布未限定於此,在凸部6,伸長性纖維EX也可具有沿著第2方向B之配向性,然後/或在凹部7,伸縮性纖維EL也可具有沿著第2方向B之配向性。 Further, in the embodiment shown in Fig. 2, the orientation of the extensible fiber EX of the convex portion 6 and the alignment property of the elastic fiber EL of the concave portion 7 are not particularly limited, but the nonwoven fabric of the present invention is not limited thereto. In the convex portion 6, the extensible fiber EX may have an orientation along the second direction B, and then, in the concave portion 7, the stretchable fiber EL may have an orientation along the second direction B.
並且,在第2圖所示之本發明之包含伸長性纖維與伸縮性纖維之不織布1,第1方向A與第2方向B為正交,但在本發明中第1方向與第2方向之間的關係沒有特別限制,第1方向與第2方向能夠具有任意角度。例如,第1方向與第2方向為平行,換句話說,該等所形成之角度可以為0°。在此般實施形態,例如,相對於與第1方向(及第2方向)正交之方向的伸縮性良好並且平面方向,特別是第1方向(及第2方向)之透氣性良好。 Further, in the nonwoven fabric 1 including the extensible fiber and the stretchable fiber of the present invention shown in Fig. 2, the first direction A and the second direction B are orthogonal to each other, but in the first direction and the second direction in the present invention, The relationship between the first and second directions can be arbitrary. For example, the first direction is parallel to the second direction, in other words, the angle formed by the numbers may be 0°. In this embodiment, for example, the stretchability in the direction orthogonal to the first direction (and the second direction) is good, and the air permeability in the plane direction, particularly the first direction (and the second direction) is good.
本發明之不織布,較佳為第1方向與第2方向正交。並且,本發明之不織布更佳為第1方向為搬運方向(以下,有稱為「方向MD」的情況),而且第2方向為與搬運方向正交之正交方向(以下,有將與搬運方向正交之正交方向稱為「正交方向」或「正交方向CD」的情況)。 In the nonwoven fabric of the present invention, it is preferable that the first direction is orthogonal to the second direction. Further, in the nonwoven fabric of the present invention, the first direction is the conveyance direction (hereinafter, referred to as "direction MD"), and the second direction is orthogonal to the conveyance direction (hereinafter, there is a conveyance and conveyance) The orthogonal direction in which the directions are orthogonal is referred to as "orthogonal direction" or "orthogonal direction CD").
第3圖及第4圖係本發明之不織布之另外實施形態的 示意圖。第3圖及第4圖所示之本發明之包含伸長性纖維與伸縮性纖維的不織布1係具有第1面2,而且第1面2係在與第1方向A正交之方向,交互地具有分別平行於第1方向A之凸部3及凹部4,而且第2面5係在與第2方向B正交之方向,交互地具有分別平行於第2方向B之凸部6及凹部7。第3圖所示之本發明之包含伸長性纖維與伸縮性纖維的不織布1,另外具有連結凹部4及凹部7之開孔部8。 3 and 4 are additional embodiments of the nonwoven fabric of the present invention. schematic diagram. The non-woven fabric 1 including the extensible fiber and the stretchable fiber of the present invention shown in Figs. 3 and 4 has the first surface 2, and the first surface 2 is alternately oriented in the direction orthogonal to the first direction A. The convex portion 3 and the concave portion 4 which are respectively parallel to the first direction A, and the second surface 5 are orthogonal to the second direction B, and alternately have the convex portion 6 and the concave portion 7 which are parallel to the second direction B, respectively. . The non-woven fabric 1 including the extensible fiber and the stretchable fiber of the present invention shown in Fig. 3 has an opening portion 8 that connects the concave portion 4 and the concave portion 7.
此外,第3圖及第4圖未表示親水化劑。 Further, Figures 3 and 4 do not show a hydrophilizing agent.
第3圖所示之本發明之包含伸長性纖維與伸縮性纖維的不織布1之第1面2,凸部3含伸長性纖維EX較多,而且凹部4含伸縮性纖維EL較多,因而凸部3之伸長性纖維的比率,比凹部4之伸長性纖維的比率更高。在凸部3,伸長性纖維EX係具有沿著第1方向A配置之傾向。 In the first surface 2 of the nonwoven fabric 1 including the extensible fiber and the stretchable fiber of the present invention shown in Fig. 3, the convex portion 3 contains a large amount of the extensible fiber EX, and the concave portion 4 contains a large amount of the stretchable fiber EL, so that it is convex. The ratio of the elongating fibers of the portion 3 is higher than the ratio of the elongating fibers of the recess portion 4. In the convex portion 3, the extensible fiber EX has a tendency to be arranged along the first direction A.
另外,第4圖所示之本發明之包含伸長性纖維與伸縮性纖維的不織布1之第2面5,凸部6含伸長性纖維EX較多,而且凹部7含伸縮性纖維EL較多,因而凸部6之伸長性纖維的比率,比凹部7之伸長性纖維的比率更高。 Further, in the second surface 5 of the nonwoven fabric 1 including the extensible fiber and the stretchable fiber of the present invention shown in Fig. 4, the convex portion 6 contains a large amount of the extensible fiber EX, and the concave portion 7 contains a large amount of the stretchable fiber EL. Therefore, the ratio of the elongating fibers of the convex portion 6 is higher than the ratio of the elongating fibers of the concave portion 7.
並且,在第3圖及第4圖之凹部4及凹部7,伸縮性纖維EL係以包圍著開孔部8的方式配置。 Further, in the concave portion 4 and the concave portion 7 in FIGS. 3 and 4, the stretchable fiber EL is disposed so as to surround the opening portion 8.
如第3圖及第4圖所示般,本發明之不織布,係在第1面及第2面具有厚度薄,且厚度方向之透氣阻力少的凹部,並且具有厚度方向之透氣阻力大致為0的一個或複數個開孔部,因而不織布之厚度方向透氣性特別良好,而且 在第1面及第2面具有成為平面方向之空氣通道的凹部,因而不織布之平面方向,特別是第1方向及第2方向之透氣性良好。另外,如第3圖及第4圖所示般,本發明之不織布,係具有伸長時能夠使構造變化之開孔部,因而初期伸長時之強度較低,容易追隨身體的動作。 As shown in Fig. 3 and Fig. 4, the nonwoven fabric of the present invention has a concave portion having a small thickness and a small air resistance in the thickness direction on the first surface and the second surface, and has a gas permeability resistance in the thickness direction of substantially 0. One or a plurality of openings, so that the non-woven fabric has particularly good gas permeability in the thickness direction, and Since the first surface and the second surface have concave portions that are air passages in the planar direction, the air permeability of the non-woven fabric is particularly good in the first direction and the second direction. Moreover, as shown in FIG. 3 and FIG. 4, the nonwoven fabric of the present invention has an opening portion which can change the structure when it is stretched, so that the strength at the time of initial elongation is low, and it is easy to follow the movement of the body.
此外,在第3圖中,第1面之凸部3及凹部4,以及第2面之凸部6及凹部7,朝向特定方向,但在本發明之不織布,該等方向、配置等沒有特別限定。另外,伸長性纖維及伸縮性纖維之配向性為任意,第1面中之複數凸部、第1面中之複數凹部、第2面中之複數凸部及/或第2面中之複數凹部的伸長性纖維及/或伸縮性纖維,可具有配向性或不具有配向性皆可。 Further, in Fig. 3, the convex portion 3 and the concave portion 4 of the first surface, and the convex portion 6 and the concave portion 7 of the second surface are oriented in a specific direction, but in the non-woven fabric of the present invention, the directions, the arrangement, and the like are not particularly limited. Further, the orientation of the extensible fiber and the stretchable fiber is arbitrary, and the plurality of convex portions in the first surface, the plurality of concave portions in the first surface, the plurality of convex portions in the second surface, and/or the plurality of concave portions in the second surface The extensible fiber and/or the stretchable fiber may have an alignment property or an omissance.
第5圖係第1圖之X-X剖面中,本發明之不織布1的示意圖。在第5圖,為了說明由本發明之不織布的第1面吸收水分的例子,以第1面向下的方式加以記載。另外,在第5圖作為本發明之不織布的一例,表示有在第1面之凸部3被覆有親水化劑9的實施形態。 Fig. 5 is a schematic view showing the nonwoven fabric 1 of the present invention in the X-X cross section of Fig. 1. In the fifth drawing, in order to explain an example in which moisture is absorbed by the first surface of the nonwoven fabric of the present invention, the first surface is described below. In addition, FIG. 5 shows an embodiment in which the convex portion 3 of the first surface is covered with the hydrophilizing agent 9 as an example of the nonwoven fabric of the present invention.
本發明之不織布具有高吸水性、速乾性之理由推測如下。 The reason why the nonwoven fabric of the present invention has high water absorbability and quick-drying property is presumed as follows.
本發明之包含伸長性纖維與伸縮性纖維之不織布1,在藉由被覆有親水化劑9而親水化的第1面2之凸部3接觸水分時,能夠將水分迅速地吸入凸部3中。凸部3係如上述般,藉由親水化劑加以親水化的伸長性纖維EX之比率較高,因而能夠迅速將水分吸入。 In the non-woven fabric 1 including the extensible fiber and the stretchable fiber of the present invention, when the convex portion 3 of the first surface 2 which is hydrophilized by the hydrophilization agent 9 is in contact with moisture, moisture can be quickly sucked into the convex portion 3 . As described above, the convex portion 3 has a high ratio of the extensible fiber EX hydrophilized by the hydrophilizing agent, so that moisture can be quickly taken in.
接著,在凸部3配向於不織布1之厚度方向的伸長性纖維EL,能夠將吸收之水分迅速地送往第2面5側。在第2面5側,各纖維往平面方向延伸,因而能夠將吸收之液體,迅速地往平面方向擴散。推測往平面方向擴散之液體,能夠從第2面整體迅速地使水分揮發。另外,在第1面形成有凸部3,所以本發明之包含伸長性纖維與伸縮性纖維之不織布1,藉由凸部3之形成,密度具有第1面附近之密度<第2面附近之密度的關係,更具體而言,密度具有凸部3附近之密度<凹部4附近之密度<第2面5附近之密度的關係,所以推測藉毛細管現象,能夠在第2面側迅速地吸起水分。 Then, the convex portion 3 is aligned with the elongated fiber EL in the thickness direction of the nonwoven fabric 1, and the absorbed moisture can be quickly sent to the second surface 5 side. On the second surface 5 side, since the fibers extend in the planar direction, the absorbed liquid can be rapidly diffused in the planar direction. It is presumed that the liquid diffused in the plane direction can rapidly evaporate water from the entire second surface. Further, since the convex portion 3 is formed on the first surface, the nonwoven fabric 1 including the extensible fiber and the stretchable fiber of the present invention has a density of the vicinity of the first surface <the vicinity of the second surface by the formation of the convex portion 3. More specifically, the density has a density in the vicinity of the convex portion 3 <a density in the vicinity of the concave portion 4 < a density in the vicinity of the second surface 5, and therefore it is estimated that the capillary phenomenon can be quickly sucked up on the second surface side. Moisture.
將以上簡要地做彙整,推測如第5圖箭頭所示般,水分能夠從凸部3吸收,迅速地移動至第2面5側,然後擴散至第2面5之整體,並迅速地揮發。 As a whole, it is estimated that the water can be absorbed from the convex portion 3 as shown by the arrow in Fig. 5, and rapidly moved to the second surface 5 side, and then diffused to the entire second surface 5, and rapidly evaporated.
此外,即使在如第2圖所示般實施形態,也推測水分能夠從凸部3吸收,迅速地移動至第2面5側,然後從具有凸部6及凹部7,並且比如第1圖所示般之平面的表面積更大之第2面5,迅速地揮發。 Further, even in the embodiment as shown in Fig. 2, it is presumed that moisture can be absorbed from the convex portion 3, rapidly moved to the second surface 5 side, and then has the convex portion 6 and the concave portion 7, and is, for example, Fig. 1 The second surface 5 having a larger surface area as shown in the plane is rapidly volatilized.
第6圖係第2圖之X-X剖面及Y-Y剖面中,本發明之包含伸長性纖維與伸縮性纖維之不織布1的示意圖。第6圖[a]及[b]係分別為Y-Y剖面及X-X剖面。在第6圖,為了說明由本發明之不織布的第2面吸收水分的例子,以第2面向下的方式加以記載。另外,在第6圖作為本發明之不織布的一例,表示有在第1面之凸部3被覆有親水化 劑9的實施形態。 Fig. 6 is a schematic view showing the nonwoven fabric 1 comprising the extensible fiber and the stretchable fiber in the X-X cross section and the Y-Y cross section of Fig. 2; Fig. 6 [a] and [b] are the Y-Y section and the X-X section, respectively. In the sixth drawing, in order to explain an example in which moisture is absorbed by the second surface of the nonwoven fabric of the present invention, the second surface is described below. In addition, Fig. 6 shows an example of the nonwoven fabric of the present invention, in which the convex portion 3 on the first surface is covered with hydrophilization. Embodiment of the agent 9.
如第6圖[a]所示般,本發明之包含伸長性纖維與伸縮性纖維之不織布1,於藉由被覆有親水化劑9而親水化的第2面5之凸部6接觸水分時,能夠將水分迅速地吸入凸部6中。凸部6係如上述般,藉由親水化劑加以親水化的伸長性纖維EX之比率較高,因而能夠迅速將水分吸入。 As shown in Fig. 6 (a), the non-woven fabric 1 including the extensible fiber and the stretchable fiber of the present invention is in contact with the convex portion 6 of the second surface 5 which is hydrophilized by the hydrophilization agent 9 The moisture can be quickly sucked into the convex portion 6. As described above, the convex portion 6 has a high ratio of the extensible fiber EX hydrophilized by the hydrophilizing agent, so that moisture can be quickly taken in.
接著,如第6圖[b]所示般,能夠使由第2面5之凸部6吸收之水分,從第1面2之凸部3與凹部4揮發,但凹部3係不織布之厚度較薄,因而推測能夠使吸收之水分,從凹部4迅速地揮發。 Next, as shown in Fig. 6(b), the moisture absorbed by the convex portion 6 of the second surface 5 can be volatilized from the convex portion 3 and the concave portion 4 of the first surface 2, but the thickness of the concave portion 3 is not woven. Since it is thin, it is presumed that the absorbed moisture can be rapidly volatilized from the concave portion 4.
將以上簡要地做彙整,推測如第6圖[b]箭頭所示般,能夠使從凸部6迅速地吸收之水分,主要從凹部4迅速地揮發。另外,具有凸部3及凹部4之第1面2係表面積較大,推測此亦有助於迅速地揮發。 As a whole, it is estimated that the moisture which is rapidly absorbed from the convex portion 6 can be rapidly volatilized from the concave portion 4 as indicated by the arrow in Fig. 6 [b]. Further, the first surface 2 having the convex portion 3 and the concave portion 4 has a large surface area, and it is presumed that it contributes to rapid evaporation.
本發明之不織布,係具有在吸水性試驗中呈現10mm以上吸水高度的吸水性,上述吸水性試驗可依據JIS L 1907:2010之「纖維製品之吸水性試驗方法」的7.1.2Byreck法,浸漬時間為5分藉此進行測定。 The non-woven fabric of the present invention has a water absorption property of a water absorption height of 10 mm or more in a water absorption test, and the water absorption test can be carried out according to the 7.1.2 Byreck method of the "Test method for water absorption of a fibrous product" of JIS L 1907:2010, immersion time. The measurement was carried out by 5 points.
本發明之不織布,係具有在吸水性試驗中呈現10mm以上吸水高度的吸水性,較佳為具有約15mm以上吸水高度,而且更佳為具有約20mm以上吸水高度的吸水性。吸水高度係表示不織布之吸水性高低的指標,因而高度越高越佳。 The nonwoven fabric of the present invention has water absorbency of a water absorption height of 10 mm or more in a water absorption test, preferably has a water absorption height of about 15 mm or more, and more preferably has a water absorption height of about 20 mm or more. The water absorption height indicates an index of the water absorption of the non-woven fabric, and thus the higher the height, the better.
本發明之不織布,係具有在蒸散性試驗中以20質量% 以上的蒸散率呈現之速乾性,上述蒸散性試驗能夠如下所述地實施。 The non-woven fabric of the present invention has 20% by mass in the evapotranspiration test The above evapotranspiration rate exhibits rapid drying property, and the above evapotranspiration test can be carried out as follows.
(1)在20℃60%RH之恆溫室,於直徑約105mm之錶玻璃滴下生理食鹽水1mL。 (1) In a thermostatic chamber of 60% RH at 20 ° C, 1 mL of physiological saline was dropped on a glass having a diameter of about 105 mm.
(2)準備100mm×100mm大小之試料。 (2) Prepare a sample of 100 mm × 100 mm size.
(3)測定上述錶玻璃及上述試料之合計質量W。 (3) The total mass W of the above-mentioned watch glass and the above sample was measured.
(3)對錶玻璃、生理食鹽水(1mL)及上述試料之合計質量W0進行測定。 (3) The total mass W 0 of the watch glass, physiological saline (1 mL), and the above sample was measured.
(4)在錶玻璃放上上述試料,使其與1mL之生理食鹽水接觸。 (4) The sample was placed on a watch glass and brought into contact with 1 mL of physiological saline.
(5)2小時後,測定錶玻璃、生理食鹽水(1mL)及上述試料之合計質量Wt。 (5) After 2 hours, the surface glass, physiological saline (1 mL), and the total mass W t of the above samples were measured.
(6)依據以下之式(1),測定2小時後之蒸散率。 (6) The evapotranspiration rate after 2 hours was measured according to the following formula (1).
蒸散率(%)=100×(Wo-Wt)/(W0-W) Evapotranspiration rate (%) = 100 × (W o - W t ) / (W 0 - W)
本發明之不織布,係具有在蒸散性試驗中以20質量%以上的蒸散率呈現之速乾性,較佳為具有藉由約30質量%以上之蒸散率,而且更佳為約40質量%以上之蒸散率所呈現之速乾性。蒸散率係表示不織布之速乾性的指標,因而其值越大越好。 The non-woven fabric of the present invention has a quick-drying property in an evapotranspiration ratio of 20% by mass or more in the transpiration test, preferably has an evapotranspiration ratio of about 30% by mass or more, and more preferably about 40% by mass or more. The quick-drying properties exhibited by the evapotranspiration rate. The evapotranspiration rate is an indicator of the quick-drying property of the non-woven fabric, so the larger the value, the better.
本發明之包含伸長性纖維與伸縮性纖維之不織布的製 造方法,係包含準備含有伸長性纖維與伸縮性纖維之待處理的不織布的步驟。 The invention comprises the non-woven fabric of the extensible fiber and the elastic fiber of the invention The method of producing comprises the step of preparing a non-woven fabric to be treated containing an extensible fiber and a stretchable fiber.
此外,在本發明,稱為「包含伸長性纖維與伸縮性纖維之待處理的不織布」的場合,作為原料之不織布,換句話說係指處理前之不織布,與後述之經過不均勻延伸步驟、流體處理步驟等以後之具有高吸水性、速乾性的不織布(該等在本說明書,被稱為「本發明之包含伸長性纖維與伸縮性纖維之不織布」、「本發明之不織布」、及「包含伸長性纖維與伸縮性纖維之不織布」)不同。 Further, in the case where the present invention is referred to as "non-woven fabric to be treated containing extensible fibers and stretchable fibers", the non-woven fabric as a raw material, in other words, the non-woven fabric before the treatment, and the uneven stretching step described later, Non-woven fabric having high water absorption and quick-drying properties after the fluid treatment step or the like (this is referred to as "non-woven fabric containing extensible fibers and stretchable fibers of the present invention", "non-woven fabric of the present invention", and " The non-woven fabric containing the extensible fiber and the stretchable fiber is different.
作為上述包含伸長性纖維與伸縮性纖維之待處理的不織布,若為包含上述伸長性纖維與上述伸縮性纖維之不織布,則無特別限制,例如藉由各種眾所周知之方法製造的不織布,例如可舉出包含熱風不織布、紡黏不織布、點黏不織布、水針不織布、紙纖不織布、熔噴不織布、奈米纖維之不織布為例。 The nonwoven fabric to be treated containing the extensible fiber and the stretchable fiber is not particularly limited as long as it is a nonwoven fabric comprising the extensible fiber and the stretchable fiber, and for example, a nonwoven fabric produced by various well-known methods, for example, For example, a non-woven fabric comprising a hot air non-woven fabric, a spunbonded non-woven fabric, a non-woven fabric, a water needle non-woven fabric, a paper fiber non-woven fabric, a melt-blown non-woven fabric, and a nanofiber is used.
上述伸長性纖維及伸縮性纖維可從上述纖維中選擇,而且考慮到伸長性纖維會因後續步驟使纖維直徑變細此點來選擇纖維直徑較佳。 The extensible fiber and the stretchable fiber may be selected from the above fibers, and the fiber diameter is preferably selected in consideration of the fact that the extensible fiber has a fiber diameter which is reduced by a subsequent step.
作為上述纖維,其纖維長沒有特別限制,可舉出例如人造纖維及連續長絲為例。混合2種以上纖維的場合,該等纖維之纖維長可以相同或不同皆可。 The fiber length of the fiber is not particularly limited, and examples thereof include rayon fibers and continuous filaments. When two or more types of fibers are mixed, the fiber lengths of the fibers may be the same or different.
本發明之方法係包含:將上述包含伸長性纖維與伸縮性纖維之待處理的不織布,以形成有具有高延伸範圍與低延伸範圍的不織布的方式不均勻地延伸的步驟(以下有「 不均勻延伸步驟」稱為的情況)。 The method of the present invention comprises the step of unevenly extending the nonwoven fabric to be treated comprising the extensible fiber and the stretchable fiber to form a non-woven fabric having a high elongation range and a low elongation range (hereinafter referred to as " The uneven extension step is referred to as the case.
上述不均勻延伸步驟係用以進行:在上述包含伸長性纖維與伸縮性纖維之待處理的不織布,部分地將(i)不織布內之纖維的各接合點加以破壞,使被固定之纖維部分地成為網絡狀態,接著/或(ii)在不織布內之纖維的各接合點之間,形成被伸長之伸長性纖維。上述伸長之伸長性纖維,在以流體進行處理之際容易移動,因而容易於不織布形成凹凸。 The uneven stretching step is performed by partially breaking the joints of the fibers in the (i) nonwoven fabric in the above-mentioned nonwoven fabric to be treated containing the extensible fibers and the stretchable fibers, so that the fibers to be fixed are partially partially fixed. In the network state, and/or (ii) between the joints of the fibers in the nonwoven fabric, elongated fibers are formed. The elongate elongated fiber is easily moved when it is treated with a fluid, and thus it is easy to form irregularities in the nonwoven fabric.
此外,上述伸縮性纖維係具有比在不均勻延伸步驟時施加之應力更高之彈性極限,因而在不均勻延伸步驟之際,被暫時地伸長之伸縮性纖維,之後能夠回到原來的長度。 Further, since the above-mentioned stretchable fiber has a higher elastic limit than the stress applied at the step of uneven stretching, the stretchable fiber which is temporarily stretched at the time of the uneven stretching step can be returned to the original length.
作為上述接合點,於熱風不織布之場合中,舉出熱熔接點為例,於紡黏不織布及點黏不織布之場合舉出熱壓接點為例,而在水針不織布之場合則舉出纖維交絡點為例。 As the joint, in the case of a hot air non-woven fabric, a hot-melt joint is exemplified, and a hot-pressed joint is exemplified in the case of a spunbonded nonwoven fabric and a non-woven fabric, and a fiber is used in the case of a water-jet non-woven fabric. The intersection point is an example.
在本說明書,「高延伸範圍」係指以被伸長之伸長性纖維的伸長度,比低延伸範圍更高的方式被延伸的範圍,而「低延伸範圍」係指以被伸長之伸長性纖維的伸長度,比高延伸範圍更低之方式延伸的範圍,且包含未形成有伸長之伸長性纖維的範圍,換言之即未延伸範圍。 In the present specification, the "high elongation range" refers to a range in which the elongation of the elongated fiber which is elongated is higher than the low elongation range, and the "low extension range" refers to the elongation fiber which is elongated. The elongation, the range extending in a manner lower than the high elongation range, and the range in which the extensible fibers are not formed, in other words, the unextended range.
在本說明書,「不均勻地延伸」係指以形成有具有高延伸範圍與低延伸範圍的不織布的方式進行延伸,換句話說,依照部位,以形成有伸長之伸長性纖維的伸長度不同之不織布的方式進行延伸。 In the present specification, "unevenly extending" means extending in such a manner as to form a non-woven fabric having a high elongation range and a low elongation range, in other words, depending on a portion, the elongation of the elongated extensible fiber is different. Extend without weaving.
上述不均勻延伸步驟,若為能夠形成具有高延伸範圍與低延伸範圍的不織布的手段,沒有特別限制,能夠藉由任意手段實施,但例如,能夠藉由以下方式進行:使用具有與搬運方向正交之旋轉軸線的一對齒輪輥,使配置在該齒輪輥之各個外周面的複數齒一邊相互咬合一邊旋轉,在該一對齒輪輥之間隙使上述包含伸長性纖維與伸縮性纖維之待處理的不織布通過(以下,有稱為「齒輪延伸」的情況)。 The uneven stretching step is not particularly limited as long as it can form a nonwoven fabric having a high elongation range and a low elongation range, and can be carried out by any means, but can be carried out, for example, by using the same direction as the conveyance direction. a pair of gear rolls that intersect the rotation axis, and the plurality of teeth disposed on the outer peripheral surfaces of the gear rolls are rotated while being engaged with each other, and the extensible fibers and the stretchable fibers are treated in the gap between the pair of gear rolls The non-woven fabric passes (hereinafter, there is a case called "gear extension").
第7圖係用於說明齒輪延伸的示意圖。第7圖所示之齒輪延伸裝置11係具有一對齒輪輥12及12’。在齒輪輥12及12’之外周面13及13’,分別配置有複數齒14及14’。另外,在第7圖所示之齒輪延伸裝置11、齒輪輥12及12’之旋轉軸線係分別與不織布之搬運方向MD垂直。並且,複數齒14及14’係分別與上述旋轉軸線平行,被配置在外周面13及13’。 Fig. 7 is a schematic view for explaining the extension of the gear. The gear extension device 11 shown in Fig. 7 has a pair of gear rollers 12 and 12'. The plurality of teeth 14 and 14' are disposed on the outer peripheral surfaces 13 and 13' of the gear rolls 12 and 12', respectively. Further, the rotation axis of the gear extending device 11 and the gear rollers 12 and 12' shown in Fig. 7 are perpendicular to the conveyance direction MD of the nonwoven fabric, respectively. Further, the plurality of teeth 14 and 14' are respectively arranged in parallel with the above-described rotation axis, and are disposed on the outer peripheral surfaces 13 and 13'.
在第7圖所示之齒輪延伸裝置11,使包含伸長性纖維與伸縮性纖維之待處理的不織布15通過一對齒輪輥12及12’之輥間隙,於通過齒輪輥12及12’之際,藉由相互咬合之齒輪輥12及12’的複數齒14及14’,將包含伸長性纖維與伸縮性纖維之待處理的不織布15,以三點彎曲的原理延伸,形成具有高延伸範圍與低延伸範圍的不織布16。具有高延伸範圍與低延伸範圍的不織布16,係在搬運方向MD交互地具有與正交方向平行之高延伸範圍與低延伸範圍。 In the gear extending device 11 shown in Fig. 7, the non-woven fabric 15 to be treated containing the extensible fibers and the stretchable fibers is passed through the roll gaps of the pair of gear rolls 12 and 12', while passing through the gear rolls 12 and 12' The non-woven fabric 15 to be treated comprising the extensible fiber and the stretchable fiber is extended by the principle of three-point bending by the plurality of teeth 14 and 14' of the gear rolls 12 and 12' which are engaged with each other to form a high extension range and Low stretch of non-woven fabric 16. The non-woven fabric 16 having a high extension range and a low extension range alternately has a high extension range and a low extension range parallel to the orthogonal direction in the conveyance direction MD.
在包含伸長性纖維與伸縮性纖維之待處理的不織布15,與複數齒14及14’之前端部相接的範圍,固定有不織布之布料,所以不太延伸或實質上不延伸,形成有低延伸範圍。另一方面,在包含伸長性纖維與伸縮性纖維之待處理的不織布15,未與複數齒14及14’之前端部相接的的範圍,換句話說,即齒14之前端部與齒14’之前端部之間的範圍被大寬度延伸,形成有高延伸範圍。 In the non-woven fabric 15 to be treated containing the extensible fiber and the stretchable fiber, and the end portion of the plurality of teeth 14 and 14' are in contact with each other, the fabric of the non-woven fabric is fixed, so that it is not extended or substantially extended, and is formed low. Extended range. On the other hand, in the range of the non-woven fabric 15 to be treated containing the extensible fiber and the stretchable fiber, which is not in contact with the front end of the plurality of teeth 14 and 14', in other words, the front end of the tooth 14 and the tooth 14 The range between the front ends is extended by a large width to form a high extension range.
齒輪延伸,還能夠使用如第8圖所示般之齒輪延伸裝置進行。 The gear extension can also be carried out using a gear extension as shown in Fig. 8.
第8圖係用於說明齒輪延伸的示意圖。第8圖所示之齒輪延伸裝置11係具有一對齒輪輥12及12’。在齒輪輥12及12’之外周面13及13’,分別配置有複數齒14及14’。另外,在第8圖所示之齒輪延伸裝置11,複數齒14及14’,分別與齒輪輥12及12’之旋轉軸線垂直地,分別被配置在外周面13及13’。將複數齒14及14’如此般與旋轉軸線垂直配置,藉此能夠形成在正交方向CD交互地具有分別與搬運方向MD平行之高延伸範圍與低延伸範圍的不織布。 Fig. 8 is a schematic view for explaining the extension of the gear. The gear extension device 11 shown in Fig. 8 has a pair of gear rollers 12 and 12'. The plurality of teeth 14 and 14' are disposed on the outer peripheral surfaces 13 and 13' of the gear rolls 12 and 12', respectively. Further, in the gear extending device 11 shown in Fig. 8, the plurality of teeth 14 and 14' are disposed on the outer peripheral faces 13 and 13', respectively, perpendicular to the rotational axes of the gear rolls 12 and 12'. By arranging the plurality of teeth 14 and 14' perpendicularly to the rotation axis, it is possible to form a non-woven fabric having a high extension range and a low extension range which are respectively parallel to the conveyance direction MD in the orthogonal direction CD.
並且,齒輪延伸能夠使用如第9圖所示般,複數齒係在齒輪輥之外周面,相對於齒輪輥之旋轉軸線為傾斜配置的齒輪延伸裝置加以實施。第9圖係用於說明齒輪延伸的示意圖。第9圖所示之齒輪延伸裝置11係具有一對齒輪輥12及12’,在齒輪輥12及12’之外周面13及13’,分別配置有複數齒14及14’。另外,第9圖所示之齒輪延伸 裝置11,齒輪輥12及12’之旋轉軸線係分別與不織布之搬運方向MD垂直。並且,複數齒14及14’係以分別相對於旋轉軸線具有固定角度θ的方式被配置在外周面13及13’。 Further, as shown in Fig. 9, the gear extension can be implemented by a gear extension device in which the plurality of teeth are arranged on the outer circumferential surface of the gear roller and arranged obliquely with respect to the rotation axis of the gear roller. Fig. 9 is a schematic view for explaining the extension of the gear. The gear extending device 11 shown in Fig. 9 has a pair of gear rolls 12 and 12', and a plurality of teeth 14 and 14' are disposed on the outer peripheral surfaces 13 and 13' of the gear rolls 12 and 12', respectively. In addition, the gear extension shown in Figure 9 The rotation axis of the device 11, the gear rollers 12 and 12' are perpendicular to the conveyance direction MD of the nonwoven fabric, respectively. Further, the plurality of teeth 14 and 14' are disposed on the outer peripheral faces 13 and 13' so as to have a fixed angle θ with respect to the rotation axis.
此外,如第9圖所示般齒輪延伸裝置,依照θ之角度及齒輪間距,也有在齒輪輥12及12’之外周面13及13’,分別配置有1片之齒14及1片之齒14’的場合。 Further, as shown in Fig. 9, the gear extending device has teeth 1 and 13 teeth arranged on the outer peripheral surfaces 13 and 13' of the gear rolls 12 and 12' in accordance with the angle θ and the gear pitch. 14' occasion.
上述齒輪延伸裝置能夠依照待形成之不織布上所期望之性能,加以適當選擇。 The gear extension device described above can be appropriately selected in accordance with the desired performance on the nonwoven fabric to be formed.
另外,在須要高伸縮性之場合,能夠將包含伸長性纖維與伸縮性纖維之待處理的不織布,使用如第7圖~第9圖所示般之齒輪延伸裝置,進行複數次延伸。 Further, in the case where high stretchability is required, the nonwoven fabric to be treated containing the extensible fiber and the stretchable fiber can be stretched a plurality of times using a gear extending device as shown in Figs. 7 to 9 .
在上述齒輪延伸裝置,齒輪間距較佳為約1~約10mm,而且更佳為約2~約6mm。齒輪間距若低於約1mm,必須將齒輪的刀刃變薄,會有不織布被部分切斷之情況,而且齒輪間距若高於約10mm,延伸倍率較低,有伸長性纖維不易伸長之情況。 In the above gear extension device, the gear pitch is preferably from about 1 to about 10 mm, and more preferably from about 2 to about 6 mm. If the gear pitch is less than about 1 mm, the blade edge of the gear must be thinned, and the non-woven fabric may be partially cut, and if the gear pitch is higher than about 10 mm, the stretch ratio is low, and the stretchable fiber is not easily stretched.
齒輪間距係指在第8圖,以符號17表示之某個齒至下一個齒之間的間隔。 The gear pitch refers to the interval between one tooth and the next tooth indicated by symbol 17 in Fig. 8.
在上述齒輪延伸裝置,齒輪咬入深度較佳為約0.5mm以上。齒輪咬入深度若低於約0.5mm,不織布之延伸將不足,有伸長性纖維不易伸長之情況。 In the above gear extension device, the gear biting depth is preferably about 0.5 mm or more. If the bite depth of the gear is less than about 0.5 mm, the extension of the non-woven fabric will be insufficient, and the extensible fiber will not easily elongate.
齒輪咬入深度係指在第8圖,以符號18表示之上齒輪輥的齒與下齒輪輥的齒,兩者重複之部分的深度。 The bite depth of the gear is referred to in Fig. 8, and the tooth of the upper gear roller and the tooth of the lower gear roller, the depth of the overlapping portion, are indicated by reference numeral 18.
在具有高延伸範圍與低延伸範圍的不織布,每1次齒輪延伸的延伸倍率較佳為約30~約400%,而且更佳為約50~約200%。延伸倍率低於約30%時,有伸長性纖維無法伸長的情況,而延伸倍率高於約400%時,有具有高延伸範圍與低延伸範圍的不織布之強度變弱,以被延長之伸長性纖維為主容易脫落,使得搬運困難的情況,而且/或著有伸長性纖維發生斷裂的情況。 In the non-woven fabric having a high elongation range and a low elongation range, the stretching ratio per one gear extension is preferably from about 30 to about 400%, and more preferably from about 50 to about 200%. When the stretching ratio is less than about 30%, the extensible fiber cannot be stretched, and when the stretching ratio is higher than about 400%, the strength of the non-woven fabric having a high elongation range and a low elongation range is weakened, and the elongation is prolonged. The fiber is mainly detached, which makes handling difficult, and/or the elongation of the fiber breaks.
在本說明書,「延伸倍率」的意思是在以齒輪間距為P,然後以齒輪咬入深度為D之場合,藉由下述之式算出的值:
包含伸長性纖維與伸縮性纖維之待處理的不織布之送出速度,也會因為所期望之延伸倍率等而變化,例如約10m/分以上。交互地具有高延伸範圍與低延伸範圍之不織布的捲取速度,在因為延伸倍率等發生變化,且包含伸長性纖維與伸縮性纖維之待處理的不織布往搬運方向延伸之場合,將送出速度乘上延伸倍率之值作為捲取速度之基準。 The feed speed of the nonwoven fabric to be treated containing the extensible fiber and the stretchable fiber may also vary depending on the desired stretch ratio, etc., for example, about 10 m/min or more. The winding speed of the non-woven fabric having a high elongation range and a low extension range alternately, when the elongation ratio is changed, and the non-woven fabric containing the extensible fiber and the stretchable fiber is extended in the conveyance direction, the delivery speed is multiplied The value of the upper stretch ratio is used as the basis for the take-up speed.
本發明之方法係包含將含有親水化劑溶液,塗布在上述具有高延伸範圍與低延伸範圍的不織布的步驟(以下有稱為「親水化劑塗布步驟」的情況)。 The method of the present invention includes a step of applying a solution containing a hydrophilizing agent to the nonwoven fabric having a high elongation range and a low elongation range (hereinafter referred to as a "hydrophilizing agent coating step").
作為在上述不均勻延伸步驟形成之具有高延伸範圍與低延伸範圍的不織布,塗布含親水化劑溶液之方法,沒有特別制限,但可舉例如:噴塗法、簾塗法、浸塗法、棒塗法、輥塗法、旋塗法等。 As the non-woven fabric having a high elongation range and a low elongation range formed in the above uneven stretching step, the method of applying the hydrophilizing agent solution is not particularly limited, but examples thereof include a spray coating method, a curtain coating method, a dip coating method, and a rod. Coating method, roll coating method, spin coating method, and the like.
在支撐體上實施上述親水化劑塗布步驟,並且直接移往下一個流體處理步驟亦可。例如,可以對配置支撐體上之具有高延伸範圍與低延伸範圍的不織布,噴塗上述親水化劑溶液藉此實施上述親水化劑塗布步驟。 The hydrophilizing agent coating step is carried out on the support and can be directly moved to the next fluid treatment step. For example, the hydrophilizing agent coating step may be carried out by spraying the above-described hydrophilizing agent solution on a non-woven fabric having a high elongation range and a low elongation range on the support.
在上述含親水化劑溶液,舉出將上述之親水化劑,溶解於溶劑(例如有機溶劑、如乙醇、甲基乙基酮、水等)的溶液為例,以安全性較高的觀點來說較佳為水。 The hydrophilization agent-containing solution is exemplified by a solution in which the above hydrophilization agent is dissolved in a solvent (for example, an organic solvent such as ethanol, methyl ethyl ketone, water, etc.), and the safety is high. It is better to say water.
上述溶劑係比較沸點較高者亦可。在親水化劑塗布步驟之後,實施後述之噴附加熱空氣等的流體處理步驟,因而上述溶劑容易揮發。 The solvent is also relatively high in boiling point. After the hydrophilizing agent application step, a fluid treatment step of spraying hot air or the like described later is performed, and thus the solvent is easily volatilized.
本發明之方法係包含:將塗布有親水化劑且具有高延伸範圍與低延伸範圍的不織布,配置在支撐體上,並將噴出的流體加以噴附,藉此進行處理,形成包含伸長性纖維與伸縮性纖維之不織布的步驟(以下有稱為「流體處理步驟」的情況)。 The method of the present invention comprises: disposing a non-woven fabric coated with a hydrophilizing agent and having a high elongation range and a low elongation range on a support, and spraying the discharged fluid to thereby form an extensible fiber. The step of non-woven fabric with stretchable fibers (hereinafter referred to as "fluid processing step").
於不均勻延伸步驟形成,存在於高延伸範圍之網絡狀態的纖維及/或伸長之伸長性纖維的至少一部分,係在流體衝突之面(以下稱為「流體衝突面」),被噴出之流體發生衝突,接著伴隨著彈回往平面方向例如正交方向被分類。更具體而言,在被噴附有噴出流體之部分,伸長之伸長 性纖維往其他處移動,主要留下伸縮性纖維,藉此在第1面形成有複數凹部。 Formed in the uneven stretching step, at least a portion of the fibers and/or elongated extensible fibers present in the network state of high elongation are on the surface of the fluid conflict (hereinafter referred to as "fluid collision surface"), and the fluid to be ejected Conflicts occur, which are then sorted along with the bounce back to the plane direction, such as the orthogonal direction. More specifically, the elongation of elongation in the portion to which the ejected fluid is sprayed The fibers move to other places, mainly leaving the stretchable fibers, whereby a plurality of concave portions are formed on the first surface.
伸縮性纖維係藉由流體之衝突受力,但所施加之應力僅止於未達彈性極限之程度,因而噴附流體之後,回到原來的場所較多。因此,在第1面中之複數凹部,含伸縮性纖維較多,但纖維密集度較低。伸長之伸長性纖維係在第1面之複數凹部的兩端形成凸部。因此,在第1面中之複數凸部,含伸長性纖維較多,而被分類之伸長性纖維密集,因而纖維之密集度變高。此外,流體衝突面係相當於包含伸長性纖維與伸縮性纖維之不織布的第1面,而且噴附流體的軌跡方向,有相當於第1方向的場合。 The stretchable fiber is forced by the conflict of the fluid, but the applied stress only ends to the extent that it does not reach the elastic limit, so that after the fluid is sprayed, it returns to the original place. Therefore, the plurality of concave portions in the first surface contain a large amount of stretchable fibers, but the fiber density is low. The elongated extensible fiber forms a convex portion at both ends of the plurality of concave portions of the first surface. Therefore, the plurality of convex portions in the first surface contain a large amount of extensible fibers, and the classified extensible fibers are dense, so that the density of the fibers is increased. Further, the fluid collision surface corresponds to the first surface including the non-woven fabric of the extensible fiber and the stretchable fiber, and the direction of the trajectory of the sprayed fluid is equivalent to the first direction.
另外,在與流體衝突面相反側的面(以下稱為「非流體衝突面」,相當於第2面),網絡狀態之纖維及/或伸長之伸長性纖維的至少一部分,沿著通過不織布之流體的流向移動。 Further, a surface on the opposite side to the fluid collision surface (hereinafter referred to as a "non-fluid collision surface" corresponds to the second surface), and at least a part of the network state fiber and/or the elongated elongation fiber passes along the non-woven fabric. The flow of fluid moves.
作為在上述流體處理步驟所使用之流體,舉出空氣(例如被加熱之空氣、水蒸氣)、或水(例如熱水)為例。 As the fluid used in the fluid processing step, air (for example, heated air or water vapor) or water (for example, hot water) is exemplified.
能夠將上述流體,從固定之流體噴嘴噴附或從往正交方向來回之流體噴嘴,噴附在塗布有親水化劑之具有高延伸範圍與低延伸範圍的不織布。另外,能夠將上述流體,連續地或間歇地從流體噴嘴,噴附在塗布有親水化劑之具有高延伸範圍與低延伸範圍的不織布。將此等加以組合,藉此能夠將具有包含預先決定之圖型的各種圖型之複數凸部及複數凹部,形成於第1面。 The fluid can be sprayed from a fixed fluid nozzle or a fluid nozzle that is moved back and forth in an orthogonal direction to a non-woven fabric having a high elongation range and a low extension range coated with a hydrophilizing agent. Further, the fluid can be continuously or intermittently sprayed from the fluid nozzle to the nonwoven fabric having the high elongation range and the low elongation range coated with the hydrophilizing agent. By combining these, it is possible to form a plurality of convex portions and a plurality of concave portions having various patterns including a predetermined pattern on the first surface.
上述流體能夠依照塗布有親水化劑之具有高延伸範圍與低延伸範圍的不織布之狀態,加以適當選擇。例如,在進行處理齒輪間距較小、延伸倍率較大之不織布的場合,能夠以比較低能量,使伸長之伸長性纖維為主進行移動,所以較佳為選擇空氣或水蒸氣作為流體。另外,在使用齒輪間距較大、低延伸範圍較多之不織布的場合,各纖維之接合點較多,因而要使伸長之伸長性纖維移動是須要比較高的能量,所以較佳為選擇水或水蒸氣作為流體,而且更佳為水蒸氣。此係因為纖維量較多部分水分不易殘存,纖維量較多部分之接合點較少被破壞,而且能夠將待移動部分的被伸長之伸長性纖維簡單地進行移動。 The fluid can be appropriately selected in accordance with the state in which the non-woven fabric having a high elongation range and a low elongation range coated with the hydrophilizing agent is applied. For example, in the case of processing a non-woven fabric having a small gear pitch and a large stretch ratio, it is possible to move the elongated extensible fiber mainly at a relatively low energy, and therefore it is preferable to select air or steam as a fluid. Further, in the case of using a non-woven fabric having a large gear pitch and a low elongation range, the number of joints of the fibers is large, and therefore it is preferable to select water or the movement of the elongated elongate fiber to require relatively high energy. The water vapor is a fluid, and more preferably water vapor. This is because the amount of fiber is less likely to remain in the moisture content, the joint portion of the fiber portion is less damaged, and the elongated elongated fiber of the portion to be moved can be easily moved.
上述流體處理步驟係能夠使用在該技術領域眾所周知之裝置,而且以眾所周知之方法進行。 The fluid treatment steps described above can be carried out using well known methods in the art and by well known methods.
本發明之方法的實施形態其中之一,使用於支撐具有高延伸範圍與低延伸範圍的不織布的支撐體,可以是在該技術領域通常被使用的支撐體,例如金屬、塑膠製之輸送帶網、抄紙網等。上述支撐體一般係具有流體滲透率。 One of the embodiments of the method of the present invention, which is used to support a non-woven fabric having a high elongation range and a low extension range, may be a support body generally used in the technical field, such as a metal or plastic conveyor belt network. , paper nets, etc. The above support generally has fluid permeability.
在本發明之方法之其他實施形態,不織布之透氣性、皮膚接觸性(例如,低接觸面積),為求吸液性等進一步提升,能夠使用具有凸狀部與凹陷部的支撐體。 In another embodiment of the method of the present invention, the gas permeability and the skin contact property (for example, a low contact area) of the nonwoven fabric are further improved, and a support having a convex portion and a depressed portion can be used.
在本發明,「凸狀部」係用以在不織布之第2面形成複數凹部的部分,而且「凹陷部」係用以在不織布之第2面形成複數凸部的部分。 In the present invention, the "convex portion" is a portion for forming a plurality of concave portions on the second surface of the non-woven fabric, and the "recessed portion" is a portion for forming a plurality of convex portions on the second surface of the non-woven fabric.
第10圖係表示在輸送帶上使用之支撐體的一例。 Fig. 10 is a view showing an example of a support used on a conveyor belt.
在第10圖,支撐體19係具有與正交方向CD平行之凸狀部20與凹陷部21,而且凸狀部20、凹陷部21係交互地配置於搬運方向MD。第10圖另外表示有流體噴嘴22,然後在支撐體19下之流體噴嘴22的正下方,設有承接流體之吸引部(未圖示)。在第10圖所示之支撐體19,凸狀部20及凹陷部21係具有立方體形狀,而且交互地排列。 In Fig. 10, the support body 19 has a convex portion 20 and a concave portion 21 which are parallel to the orthogonal direction CD, and the convex portion 20 and the concave portion 21 are alternately arranged in the conveyance direction MD. Fig. 10 additionally shows a fluid nozzle 22, and then a suction portion (not shown) for receiving a fluid is provided directly below the fluid nozzle 22 under the support 19. In the support body 19 shown in Fig. 10, the convex portion 20 and the concave portion 21 have a cubic shape and are alternately arranged.
在第10圖,凸狀部20與凹陷部21係平行於正交方向CD並且交互地配置於搬運方向MD,但在本發明之方法,凸狀部及凹陷部之形狀、排列等沒有特別限制,例如,凸狀部及凹陷部也可以是(i)分別平行於搬運方向之凸狀部及凹陷部,且也可交互地配置於正交方向,或是(ii)相對於搬運方向分別具有傾斜之凸狀部及凹陷部,且也可交互地配置於與該傾斜之方向正交的方向,或者是(iii)預先決定之形狀(例如,立方體形、圓柱形、半球形等)的凸狀部及/或凹陷部,以預先決定之排列(例如,心型、星型等排列)加以配置亦可。 In the tenth diagram, the convex portion 20 and the concave portion 21 are parallel to the orthogonal direction CD and are alternately arranged in the conveying direction MD. However, in the method of the present invention, the shape, arrangement, and the like of the convex portion and the depressed portion are not particularly limited. For example, the convex portion and the concave portion may be (i) convex portions and concave portions respectively parallel to the conveying direction, and may be alternately arranged in the orthogonal direction, or (ii) respectively having respect to the conveying direction. The inclined convex portion and the concave portion may be alternately disposed in a direction orthogonal to the direction of the inclination, or (iii) a predetermined shape (for example, a cubic shape, a cylindrical shape, a hemispherical shape, or the like) The shape and/or the recess may be arranged in a predetermined arrangement (for example, a heart shape, a star shape, or the like).
使用具有凸狀部與凹陷部的支撐體時,比起使用不具有凸狀部及凹陷部之支撐體的場合,能夠形成具有更大之複數凸部、更深之複數凹部(依照場合為一個或複數個開孔部)的不織布。 When a support having a convex portion and a concave portion is used, a plurality of concave portions having a larger plurality of convex portions and deeper portions can be formed than when a support body having no convex portions and concave portions is used (according to the case of one or Non-woven fabric of a plurality of opening portions).
將上述現象使用第10圖進行具體說明。從流體噴嘴22噴出之流體,與凸狀部20衝突時,繞往凹陷部21流動。其結果,自由度高之被伸長的伸長性纖維,沿著流體之 流向移動至凹陷部21方向,因而流體與凸狀部20交差處,主要只留下伸縮性纖維,纖維之密集度降低,在第2面5形成有複數凹部。伸縮性纖維雖因流體之力暫時地伸長,但在所施加之應力僅止於未達彈性極限之程度場合,於流體消失,不施加應力之後,原則上會回復原狀。因此,在第2面5之複數凹部含伸縮性纖維較多。在噴附流體之力較強的場合,伸縮性纖維也進行某程度移動,形成有連結第1面2之凹部與第2面5之凹部的一個或複數個開孔部。 The above phenomenon will be specifically described using FIG. When the fluid ejected from the fluid nozzle 22 collides with the convex portion 20, it flows around the concave portion 21. As a result, the elongated, extensible fiber with a high degree of freedom, along the fluid The flow direction moves to the direction of the recessed portion 21, so that the fluid and the convex portion 20 intersect each other, and only the stretchable fibers are left, and the density of the fibers is lowered, and a plurality of concave portions are formed on the second surface 5. Although the stretchable fiber is temporarily stretched by the force of the fluid, when the applied stress is only at the extent that the elastic limit is not reached, the fluid disappears, and after the stress is not applied, the original state is restored. Therefore, the plurality of concave portions on the second surface 5 contain a large amount of stretchable fibers. When the force of spraying the fluid is strong, the stretchable fiber also moves to some extent, and one or a plurality of openings that connect the concave portion of the first surface 2 and the concave portion of the second surface 5 are formed.
在流體與凹陷部21交差處,由於聚集被伸長之伸長性纖維,因而纖維密集,且在第2面5形成複數凸部,而第2面5之複數凸部含伸長性纖維較多。在第10圖之場合,第2方向係凸狀部20及凹陷部21之方向,換句話說即正交方向CD。在第2面5之複數凸部,於不織布之厚度方向,被伸長之伸長性纖維有豎起之傾向,所以不織布被賦予有耐壓縮性,進一步提升吸液性。另外,第10圖所示之包含伸長性纖維與伸縮性纖維之不織布1,由於第2面5具有複數凸部,所以透氣性,特別是平面方向的透氣性良好,並且接觸面積少所以皮膚接觸性良好。 At the intersection of the fluid and the depressed portion 21, the fibers are dense due to the aggregation of the elongated fibers, and the plurality of convex portions are formed on the second surface 5, and the plurality of convex portions of the second surface 5 contain a large number of extensible fibers. In the case of Fig. 10, the second direction is the direction of the convex portion 20 and the depressed portion 21, in other words, the orthogonal direction CD. In the plurality of convex portions on the second surface 5, the elongated fibers which are elongated in the thickness direction of the nonwoven fabric tend to rise, so that the nonwoven fabric is provided with compression resistance and further improves liquid absorbency. In addition, the non-woven fabric 1 including the extensible fiber and the stretchable fiber shown in Fig. 10 has a plurality of convex portions on the second surface 5, so that the gas permeability, particularly the air permeability in the planar direction is good, and the contact area is small, so the skin contact Good sex.
使用具有凸狀部與凹陷部的支撐體所形成之不織布,與不使用其所形成的場合比較,在第2面具有高度較高之複數凸部、深度較深之複數凹部,因而透氣性,特別是平面方向之透氣性、耐壓縮性、吸液性、皮膚接觸性良好。第2面中之複數凸部係由纖維強度比較高的伸長性纖維為 主構成,所以強度較高不易潰散。使用具有凸狀部與凹陷部的支撐體所形成之不織布,在具有一個或複數個開孔部之場合,厚度方向之透氣性良好。 The non-woven fabric formed by using the support having the convex portion and the concave portion has a plurality of high-density convex portions and a plurality of deep concave portions on the second surface as compared with the case where the non-woven fabric having the convex portion and the concave portion is formed, and thus the gas permeability is improved. In particular, the gas permeability, compression resistance, liquid absorbency, and skin contact properties in the planar direction are good. The plurality of convex portions in the second surface are made of elongating fibers having relatively high fiber strength. The main composition, so the strength is high and not easy to collapse. A non-woven fabric formed by using a support having a convex portion and a concave portion has a good gas permeability in a thickness direction when one or a plurality of openings are provided.
此外,如第10圖所示般使用支撐體所形成之不織布,在平面方向之透氣性中,特別是正交方向之透氣性良好。此係因為上述不織布之中與支撐體之凸狀部(不織布之第2面之凹部)對應處,可成為氣體的通路。 Further, as shown in Fig. 10, the nonwoven fabric formed by the support is used, and in the air permeability in the planar direction, the gas permeability in the orthogonal direction is particularly good. This is because the non-woven fabric corresponds to the convex portion of the support (the recess of the second surface of the non-woven fabric), and can serve as a passage for the gas.
上述凸狀部較佳為具有比凹陷部之流體滲透率更低的流體滲透率。此係因為藉由凸狀部具有較低之流體滲透率,使在凸狀部衝突之流體往凹陷部的方向流動,能夠在藉由本發明之方法形成之包含伸長性纖維與伸縮性纖維之不織布的第2面,形成高度更高之複數凸部。 Preferably, the convex portion has a fluid permeability lower than a fluid permeability of the depressed portion. This is because the convex portion has a low fluid permeability, so that the fluid colliding with the convex portion flows in the direction of the concave portion, and the non-woven fabric comprising the extensible fiber and the elastic fiber can be formed by the method of the present invention. On the second side, a plurality of higher convex portions are formed.
作為上述凸狀部之素材可舉出金屬、塑膠等為例。 Examples of the material of the convex portion include metal, plastic, and the like.
上述凸狀部及凹陷部雖沒有特別限制,但可以藉由例如在通常作為流體滲透率之支撐體被使用之金屬、塑膠製等的輸送帶網、抄紙網、衝孔板等之上,將立方體形、筒狀等金屬,以保持固定間隔等,預先決定的排列進行配置來形成。 The convex portion and the depressed portion are not particularly limited, but may be, for example, a metal such as a metal, a plastic, or the like, which is used as a support for fluid permeability, a paper web, a punching plate, or the like. Metals such as a cubic shape and a cylindrical shape are formed by arranging in a predetermined arrangement at a constant interval or the like.
作為預先決定之形狀(例如,立方體形、圓柱形、半球形等)的凸狀部及/或凹陷部,以預先決定之排列(例如,心型、星型等排列)加以配置的支撐體,舉出例如在衝孔板上,以預先決定之排列(例如,心型)加以配置半球型形狀之金屬者為例。使用該支撐體時,能夠形成在第2面具有預先決定之圖型(例如,心型)凹部的不織布。 a support having a predetermined shape (for example, a cubic shape, a cylindrical shape, a hemispherical shape, or the like) and a concave portion, which are arranged in a predetermined arrangement (for example, a heart shape, a star shape, or the like), For example, a metal having a hemispherical shape is arranged in a predetermined arrangement (for example, a heart shape) on a punching plate. When the support is used, a nonwoven fabric having a predetermined pattern (for example, a heart-shaped recess) on the second surface can be formed.
另外,例如在衝孔板上,使用半球型之凹陷形狀係以預先決定之排列(例如,心型)加以配置之具有凸狀部與凹陷部的支撐體時,能夠形成在第2面具有預先決定之圖型(例如,心型)之複數凸部的不織布。 Further, for example, when a hemispherical concave shape is used as a support having a convex portion and a concave portion which are arranged in a predetermined arrangement (for example, a heart shape) on the punching plate, the second surface can be formed in advance on the second surface. The non-woven fabric of the plurality of convex portions of the determined pattern (for example, the heart shape).
在流體處理步驟於輥上進行之場合,能夠使用輥狀之支撐體,且其外周係以網目等之流體滲透率材料所構成,並且在外周面配置有預先決定之形狀及排列的凸狀部及凹陷部者。作為該預先決定之形狀及排列,可舉出上述之形狀及排列為例。 When the fluid processing step is performed on a roll, a roll-shaped support body can be used, and the outer periphery thereof is formed of a fluid permeability material such as a mesh, and a convex portion having a predetermined shape and arrangement is disposed on the outer peripheral surface. And the depression. The shapes and arrangements described above are exemplified as the above-described shapes and arrangements.
第11圖係表示使用第10圖所示之支撐體19所形成,包含伸長性纖維與伸縮性纖維之不織布1。第11圖係相當於在第10圖以Z-Z表示之剖面。於第11圖,在支撐體19之凹陷部21形成有第2面5之凸部6,而在支撐體19之凸狀部20形成有第2面5之凹部7。 Fig. 11 is a view showing a nonwoven fabric 1 comprising an extensible fiber and a stretchable fiber, which is formed using the support 19 shown in Fig. 10. Fig. 11 corresponds to a section indicated by Z-Z in Fig. 10. In the eleventh figure, the convex portion 6 of the second surface 5 is formed in the depressed portion 21 of the support body 19, and the concave portion 7 of the second surface 5 is formed in the convex portion 20 of the support body 19.
在本發明之另外實施形態,能夠使用第12圖所示之支撐體19。在第12圖所示之支撐體19,凸狀部20及凹陷部21分別具有立方體形及格子形狀,而凸狀部20以於搬運方向及正交方向隔著固定間隔之排列加以配置。 In another embodiment of the present invention, the support 19 shown in Fig. 12 can be used. In the support body 19 shown in Fig. 12, the convex portion 20 and the recess portion 21 have a cubic shape and a lattice shape, respectively, and the convex portion 20 is arranged in a direction in which the conveyance direction and the orthogonal direction are arranged at a fixed interval.
在如第12圖所示般使用支撐體之場合,第2面形成有複數凸部6,1個凹部7。 When the support is used as shown in Fig. 12, the second surface is formed with a plurality of convex portions 6 and one concave portion 7.
在具有凸狀部與凹陷部的支撐體,該等之寬度在待形成之不織布因所須之特性等而不同,但在例如,第10圖所示之支撐體,凸狀部之寬度較佳為在約0.5~約10mm之範圍,凹陷部之寬度較佳為在約1~約10mm之範圍。 In the support body having the convex portion and the concave portion, the width of the non-woven fabric to be formed differs depending on the required characteristics, etc., but for example, in the support body shown in Fig. 10, the width of the convex portion is preferably The width of the depressed portion is preferably in the range of from about 1 to about 10 mm in the range of from about 0.5 to about 10 mm.
上述包含伸長性纖維與伸縮性纖維之不織布,係厚度方向之透氣度較佳為約400m3/m2/分以上,更佳為約600m3/m2/分以上,而且最佳為約1000m3/m2/分以上。厚度方向之透氣度越高,使用在接觸人體之部位的場合等越不容易悶熱。 The nonwoven fabric comprising the extensible fiber and the stretchable fiber preferably has a gas permeability in a thickness direction of about 400 m 3 /m 2 /min or more, more preferably about 600 m 3 /m 2 /min or more, and most preferably about 1000 m. 3 / m 2 / min or more. The higher the air permeability in the thickness direction, the less likely it is to be stuffy when used in a place where it contacts a human body.
另外,上述包含伸長性纖維與伸縮性纖維之不織布,係平面方向之透氣度較佳為約5m3/m2/分以上,更佳為約10m3/m2/分以上,而且特佳為約15m3/m2/分以上。水平方向之透氣度越高,濕度高的空氣越不易滯留於皮膚附近,容易排出至外部。 Further, the nonwoven fabric comprising the extensible fiber and the stretchable fiber preferably has a gas permeability in a plane direction of about 5 m 3 /m 2 /min or more, more preferably about 10 m 3 /m 2 /min or more, and particularly preferably It is about 15 m 3 /m 2 /min or more. The higher the air permeability in the horizontal direction, the less the air with high humidity stays in the vicinity of the skin and is easily discharged to the outside.
本發明之不織布,係適用於吸收性物品(例如生理用品及拋棄式紙尿褲)、清潔用品(例如抹布)、以及醫療用品(例如口罩)等。 The nonwoven fabric of the present invention is suitable for use in absorbent articles (e.g., physiological products and disposable diapers), cleaning articles (e.g., rags), and medical articles (e.g., masks).
另外,在拋棄式紙尿褲之外裝薄片,使用伸縮性不織布之場合,包含伸縮性纖維之本發明的不織布係具有伸縮性,因而取代上述伸縮性不織布,作為外裝薄片使用。將本發明之不織布作為拋棄式紙尿褲之外裝薄片使用時,外裝薄片具有高吸水性與速乾性,因而能夠將使用者所流的汗,從外裝薄片迅速地吸收,然後蒸散至拋棄式紙尿褲外,其結果,能夠保持拋棄式紙尿褲內之環境良好。 In addition, when a stretchable non-woven fabric is attached to a sheet other than the disposable diaper, the nonwoven fabric of the present invention including the stretchable fiber has stretchability, and is used as an exterior sheet instead of the stretchable nonwoven fabric. When the non-woven fabric of the present invention is used as a disposable diaper, the outer sheet has high water absorption and quick-drying properties, so that the sweat flowing from the user can be quickly absorbed from the outer sheet and then evaporated to a disposable type. As a result of the diaper, it is possible to maintain a good environment in the disposable diaper.
以下、舉出實施例及比較例為例對本發明進行說明,但本發明並非限定於該等實施例。 Hereinafter, the present invention will be described by way of examples and comparative examples, but the present invention is not limited to the examples.
在實施例及比較例被評估之項目的測定條件係如下所述。 The measurement conditions of the items evaluated in the examples and comparative examples are as follows.
基重係依照JIS L 1906之5.2進行測定。 The basis weight was measured in accordance with 5.2 of JIS L 1906.
體積係使用大榮科學精器製作所股份有限公司製THICKNESS GAUGE UF-60進行測定。 The volume was measured using THICKNESS GAUGE UF-60 manufactured by Daiei Scientific Seiki Co., Ltd.
透氣度係使用KATO TECH股分有限公司之KES-F8-AP1透氣性試驗器進行測定,將單位換算為「m3/m2/分」。 The air permeability was measured using a KES-F8-AP1 gas permeability tester of KATO TECH Co., Ltd., and the unit was converted to "m 3 /m 2 /min".
不織布之厚度方向的透氣度係將切割為100mm×100mm大小之不織布,設置於透氣性試驗器進行測定。 The air permeability in the thickness direction of the non-woven fabric was cut into a non-woven fabric of a size of 100 mm × 100 mm, and placed in a gas permeability tester for measurement.
不織布之平面方向的透氣度係將切割為100mm×100mm大小之不織布,設置於透氣性試驗器,進一步將100mm×100mm大小之壓克力板設置於其上,在3.5mN/cm2之加重下進行測定。 The air permeability in the plane direction of the non-woven fabric is cut into a non-woven fabric of a size of 100 mm × 100 mm, and is placed in a gas permeability tester, and an acrylic plate of a size of 100 mm × 100 mm is further placed thereon, and the weight is increased by 3.5 mN/cm 2 . The measurement was carried out.
使用島津製作所股份有限公司製之自動立體測圖儀型拉伸試驗機形式AG-1KNI,以下述循環進行測定。 -50%伸長時強度- The measurement was carried out in the following cycle using an autostereoscopic tensile tester type AG-1KNI manufactured by Shimadzu Corporation. -50% elongation strength -
將寬度50mmm之試料,以夾具間距離100mm固定於夾具,在2個夾具之前端做記號。接著,將試料以100mm/分的速度伸長至伸度100%(向外),且以100mm/分之速度返回至原來的長度(返回)(以上為1循環)。將向外伸長50%時之每寬度50mm的強度,作為伸長50%時強度進行評估。 A sample having a width of 50 mm was fixed to the jig at a distance of 100 mm between the jigs, and marks were made at the front ends of the two jigs. Next, the sample was stretched at a speed of 100 mm/min to a stretch of 100% (outward), and returned to the original length (return) at a speed of 100 mm/min (the above is 1 cycle). The strength of 50 mm per width when the outward elongation was 50% was evaluated as the strength at 50% elongation.
將上述循環實施1次後之記號間的長度L(mm)進行測定,將1循環後回復率依照下述式算出。 The length L (mm) between the symbols after the above-mentioned cycle was performed was measured, and the recovery rate after one cycle was calculated according to the following formula.
1循環後回復率(%)=100×[100-(L-100)]/100 Recovery rate after 1 cycle (%) = 100 × [100 - (L - 100)] / 100
上述50%伸長時強度較佳為約10N以下。該強度超過約10N時,在例如,使用於拋棄式紙尿褲之場合,在穿著時紙尿褲不易伸展,而穿著不易。此外,在本說明書,將每寬度50mm之強度(N)略記為N/50mm。 The strength at the 50% elongation is preferably about 10 N or less. When the strength exceeds about 10 N, for example, when used in a disposable diaper, the diaper is not easily stretched when worn, and it is not easy to wear. Further, in the present specification, the strength (N) of 50 mm per width is abbreviated as N/50 mm.
上述1循環後回復率較佳為約50%以上。這是由於在使用於拋棄式紙尿褲等場合,若上述1循環後回復率之值較小,則在使用於拋棄式紙尿褲等場合,隨著使用會有不織布之伸縮性消失,拋棄式紙尿褲滑落的情況。 The recovery rate after the above one cycle is preferably about 50% or more. This is because, when it is used in a disposable diaper or the like, if the value of the recovery rate after one cycle is small, when it is used in a disposable diaper or the like, the stretchability of the non-woven fabric disappears with use, and the disposable diaper slides down. Happening.
將不織布切為50mm×50mm之尺寸,從該處將第2面凸部之頂部付近的纖維(以下稱為「凸部之纖維」),以切割刀切開。接著,計量凸部之纖維,浸漬於20mL之二甲基乙醯胺,在室溫靜置30分。接著,將殘留纖維過濾,以乙醇加以洗淨,然後使其乾燥。從殘留纖維之乾燥質量,算出伸長性纖維之比率。 The non-woven fabric was cut into a size of 50 mm × 50 mm, and fibers (hereinafter referred to as "fibers of the convex portion") which were brought close to the top of the second convex portion were cut by a cutter. Next, the fibers of the convex portion were weighed and immersed in 20 mL of dimethylacetamide, and allowed to stand at room temperature for 30 minutes. Next, the residual fiber was filtered, washed with ethanol, and then dried. The ratio of the extensible fibers was calculated from the dry mass of the residual fibers.
另外,同樣地,關於第2面之凹部之底部付近的纖維,也將伸長性纖維之比率算出。 Further, similarly, the ratio of the elongating fibers was also calculated for the fibers near the bottom of the concave portion of the second surface.
購入作為伸長性纖維包含聚丙烯纖維並且作為伸縮性纖維包含聚氨酯系彈性體纖維之紡黏不織布。聚丙烯纖維係纖維直徑約21μm,而且聚氨酯系彈性體纖維係纖維直徑約25μm,而且聚丙烯纖維與聚氨酯纖維之質量比係約50:50。此外,上述聚丙烯纖維在紡絲時,相對於聚丙烯纖維之質量混合有0.3質量%非離子系親水化劑藉此親水化,但聚氨酯系彈性體纖維未親水化。 A spunbonded nonwoven fabric comprising a polypropylene fiber as an extensible fiber and a polyurethane-based elastomer fiber as a stretchable fiber was purchased. The polypropylene fiber-based fiber has a diameter of about 21 μm, and the polyurethane-based elastomer fiber-fiber has a diameter of about 25 μm, and the mass ratio of the polypropylene fiber to the polyurethane fiber is about 50:50. Further, at the time of spinning, the polypropylene fiber is hydrophilized by mixing 0.3% by mass of a nonionic hydrophilizing agent with respect to the mass of the polypropylene fiber, but the polyurethane-based elastomer fiber is not hydrophilized.
將上述紡黏不織布之特性表示於表1。 The properties of the spunbonded nonwoven fabric described above are shown in Table 1.
將上述紡黏不織布,以30m/分之速度送出,使用第7圖所示之齒輪延伸裝置(齒輪間距:4.9mm,齒輪咬入深度 :7.0mm,齒輪前端寬度:0.2mm,齒輪溫度:55℃),至延伸倍率203%為止,往搬運方向MD方向進行齒輪延伸,形成具有高延伸範圍與低延伸範圍的不織布。 The spunbonded nonwoven fabric was fed at a speed of 30 m/min, using the gear extension device shown in Fig. 7 (gear spacing: 4.9 mm, gear biting depth) : 7.0 mm, gear front end width: 0.2 mm, gear temperature: 55 ° C), until the stretch ratio is 203%, the gear is extended in the transport direction MD direction to form a non-woven fabric having a high extension range and a low extension range.
上述具有高延伸範圍與低延伸範圍的不織布,在與齒之前端部相接的低延伸範圍,殘留有壓花部分。另外,在未與齒之前端部相接的高延伸範圍,壓花部分一部分被破壞,形成網絡範圍。 The above non-woven fabric having a high elongation range and a low extension range has an embossed portion remaining in a low extension range in contact with the front end portion of the tooth. In addition, a portion of the embossed portion is broken in a high extent that is not in contact with the front end of the tooth, forming a network range.
將上述具有高延伸範圍與低延伸範圍的不織布之特性,示於表1。 The characteristics of the above non-woven fabric having a high elongation range and a low elongation range are shown in Table 1.
將上述具有高延伸範圍與低延伸範圍的不織布,放置於由圓孔60°鋸齒型之衝孔板(:3.0mm、MD間距:6.93mm、CD間距:4.0mm、厚度:1.0mm)所構成之支撐體上,將作為含親水化劑溶液之蔗糖脂肪酸酯的2.5質量%水溶液,以使蔗糖脂肪酸酯之基重為約0.1g/m2的方式,對上述具有高延伸範圍與低延伸範圍的不織布進行噴塗塗裝。 The above non-woven fabric having a high extension range and a low extension range is placed on a 60° sawtooth type perforated plate ( : 3.0 mm, MD pitch: 6.93 mm, CD pitch: 4.0 mm, thickness: 1.0 mm), a support body composed of a 2.5% by mass aqueous solution of a sucrose fatty acid ester containing a hydrophilizing agent solution to make sucrose fat The non-woven fabric having a high elongation range and a low elongation range was spray-coated in such a manner that the basis weight of the acid ester was about 0.1 g/m 2 .
接著,將塗布有親水化劑之具有高延伸範圍與低延伸範圍的不織布,在1.0mm之間隔具備複數噴嘴(:0.5mm)的蒸氣處理系統(噴出壓力:0.25Mpa,水蒸氣溫度:約125℃),一邊保持噴嘴及支撐體間距離為4.0mm,一邊 以30m/分之速度通過,製得不織布1。 Next, a non-woven fabric having a high elongation range and a low elongation range coated with a hydrophilizing agent is provided with a plurality of nozzles at intervals of 1.0 mm ( A steam treatment system (discharge pressure: 0.25 MPa, water vapor temperature: about 125 ° C) of 0.5 mm) was passed through at a speed of 30 m/min while maintaining a distance between the nozzle and the support of 4.0 mm to obtain a nonwoven fabric 1.
不織布1之特性表示於表1。 The characteristics of the nonwoven fabric 1 are shown in Table 1.
除了最初之紡黏不織布的基重不同以外,與製造例1同樣地進行處理,製得不織布2及3。不織布2及3之特性表示於表1。 The nonwoven fabrics 2 and 3 were produced in the same manner as in Production Example 1 except that the basis weight of the first spunbonded nonwoven fabric was different. The characteristics of the nonwoven fabrics 2 and 3 are shown in Table 1.
除了不進行親水化劑處理以外,與製造例1同樣地進行處理,製得不織布4。不織布4之特性表示於表1。 The non-woven fabric 4 was obtained in the same manner as in Production Example 1 except that the hydrophilization agent treatment was not carried out. The characteristics of the nonwoven fabric 4 are shown in Table 1.
在最初之紡黏,聚丙烯纖維未含有親水化劑並且基重不同,而且不進行親水化劑處理以外,與製造例1同樣地進行處理,製得不織布5。不織布5之特性表示於表1。 In the first spunbond, the polypropylene fibers were not treated with a hydrophilizing agent and the basis weight was different, and the treatment with the hydrophilizing agent was not carried out, and the nonwoven fabric 5 was obtained in the same manner as in Production Example 1. The characteristics of the nonwoven fabric 5 are shown in Table 1.
依照專利文獻1所述之方法,形成不織布6。不織布6之特性表示於表1。 The nonwoven fabric 6 is formed in accordance with the method described in Patent Document 1. The characteristics of the nonwoven fabric 6 are shown in Table 1.
對不織布1~6,實施吸水性試驗,測定吸水高度。吸水性試驗係依照上述之記載實施。將結果表示於表1。 For the non-woven fabrics 1 to 6, a water absorption test was carried out to measure the water absorption height. The water absorption test was carried out in accordance with the above description. The results are shown in Table 1.
接著,對不織布1~6,實施蒸散性試驗,測定蒸散率。蒸散性試驗係依照上述之記載實施。此外,在上述蒸散性試驗,不織布係以不織布之支撐體側的面接觸生理食鹽水的方式置於錶玻璃。將結果表示於表1。 Next, the non-woven fabrics 1 to 6 were subjected to an evapotranspiration test, and the evapotranspiration rate was measured. The evapotranspiration test was carried out in accordance with the above description. Further, in the above-described evapotranspiration test, the nonwoven fabric was placed on the watch glass so that the surface on the support side of the nonwoven fabric contacted the physiological saline. The results are shown in Table 1.
可知實施例1~3之不織布1~3係平面方向及厚度方 向之透氣性良好,而且具有高吸水性與速乾性。 It can be seen that the non-woven fabrics 1 to 3 of the embodiments 1 to 3 are in the plane direction and the thickness. It has good gas permeability and high water absorption and quick drying properties.
另外,被覆有親水化劑之不織布1~3,與參考例1之不織布,換句話說即只有伸長性纖維含有親水化劑之不織布比較,可知具有高吸水性與速乾性。 Further, the non-woven fabrics 1 to 3 coated with the hydrophilizing agent were found to have high water absorbability and quick-drying properties as compared with the non-woven fabric of Reference Example 1, in other words, only the non-woven fabric in which the elongating fibers contained the hydrophilizing agent.
將作為伸長性纖維之聚烯烴纖維(纖維直徑約21μm),以及作為伸縮性纖維之聚氨酯纖維(纖維直徑25μm),以約50:50之比率含有的紡黏不織布購入。 A polyolefin fiber (having a fiber diameter of about 21 μm) as an extensible fiber and a urethane fiber (fiber diameter of 25 μm) as a stretchable fiber were purchased at a ratio of about 50:50.
將上述紡黏不織布,以10m/分的速度送出,通過被預熱至80℃之4根預熱輥,在第8圖所示之齒輪延伸裝置(齒輪間距:2.5mm,齒輪咬入深度:3.0mm,延伸倍率:160%)進行齒輪延伸,接著,在第7圖所示之齒輪延伸裝置(齒輪間距:4.9mm,齒輪咬入深度:7.0mm,延伸倍率:202%)進行齒輪延伸,形成具有高延伸範圍與低延伸範圍的不織布。2個齒輪延伸裝置的齒輪溫度為55℃。 The spunbonded nonwoven fabric was fed at a speed of 10 m/min, and passed through four preheating rolls preheated to 80 ° C, and the gear extension device shown in Fig. 8 (gear spacing: 2.5 mm, gear biting depth: 3.0 mm, extension ratio: 160%) for gear extension, and then, gear extension device (gear spacing: 4.9 mm, gear biting depth: 7.0 mm, extension ratio: 202%) shown in FIG. A non-woven fabric having a high elongation range and a low extension range is formed. The gear speed of the two gear extensions was 55 °C.
上述具有高延伸範圍與低延伸範圍的不織布,在與齒之前端部相接的低延伸範圍,殘留有壓花部分。另外,在未與齒之前端部相接的高延伸範圍,壓花部分一部分被破壞,形成網絡範圍。 The above non-woven fabric having a high elongation range and a low extension range has an embossed portion remaining in a low extension range in contact with the front end portion of the tooth. In addition, a portion of the embossed portion is broken in a high extent that is not in contact with the front end of the tooth, forming a network range.
將上述具有高延伸範圍與低延伸範圍的不織布,如第10圖所示般,置於在搬運方向交互地具有分別平行於正交方向之凸狀部與凹陷部的支撐體上。凸狀部係不會透過流體,其寬度及高度係分別為3mm及5mm。凹陷部之寬度為2mm。接著,將上述齒輪處理後之不織布,在2.0mm之間隔具備複數噴嘴( 0.5mm)的蒸氣處理系統以5m/分之速度通過,製得不織布7~9。不織布7~9係具有複數開孔部。 The non-woven fabric having the high extension range and the low extension range described above is placed on the support body having the convex portions and the concave portions respectively parallel to the orthogonal directions in the conveyance direction as shown in Fig. 10. The convex portion does not pass through the fluid, and its width and height are 3 mm and 5 mm, respectively. The width of the depressed portion is 2 mm. Next, the non-woven fabric after the gear processing described above is provided with a plurality of nozzles at intervals of 2.0 mm ( A 0.5 mm) steam treatment system was passed at a speed of 5 m/min to obtain non-woven fabrics 7 to 9. The non-woven fabrics 7 to 9 have a plurality of openings.
此外,在進行伸長性纖維之比率評估時,親水化劑塗布步驟被省略。此係推測因親水化劑塗布步驟之有無,不會使伸長性纖維之比率變化,而且推測在不織布被覆有親水化劑,會有因此使伸長性纖維之比率之測定產生誤差的場合。 Further, the hydrophilizing agent coating step is omitted when the ratio of the elongation fibers is evaluated. In this case, it is presumed that the ratio of the elongating fibers is not changed by the presence or absence of the hydrophilizing agent coating step, and it is presumed that the non-woven fabric is coated with the hydrophilizing agent, and thus the measurement of the ratio of the elongating fibers may cause an error.
將蒸氣處理系統之壓力及水蒸氣溫度之條件,在以下之表2表示,將不織布7~9之特性一併表示於表2。 The conditions of the pressure of the steam treatment system and the water vapor temperature are shown in Table 2 below, and the characteristics of the nonwoven fabrics 7 to 9 are collectively shown in Table 2.
將不織布7~9中,作為伸長性纖維之聚烯烴纖維之 比率,藉由染色法進行評估。 Non-woven fabrics 7 to 9 as polyolefin fibers for extensible fibers The ratio is evaluated by the staining method.
以將聚氨酯纖維染為紅色並且不將聚烯烴纖維染色之染料,對不織布7~9進行染色,藉由光學顯微鏡以目視進行評估。其結果,關於不織布7~9全部,在第1面及第2面,分別如第3圖及第4圖所示般,確認作為伸長性纖維之聚烯烴纖維,以及作為伸縮性纖維之聚氨酯纖維的分佈不均。更具體而言,係確認第1面之凸部中的聚烯烴纖維之比率,比第1面之凹部中的聚氨酯纖維之比率更高,而且第2面之凸部中的聚烯烴纖維之比率,比第2面之凹部中的聚氨酯纖維之比率更高。 The non-woven fabrics 7 to 9 were dyed with a dye which dyed the polyurethane fibers in red and did not dye the polyolefin fibers, and were visually evaluated by an optical microscope. As a result, all of the nonwoven fabrics 7 to 9 were identified as the polyolefin fibers as the extensible fibers and the polyurethane fibers as the stretch fibers in the first and second faces, as shown in Figs. 3 and 4, respectively. The distribution is uneven. More specifically, it is confirmed that the ratio of the polyolefin fibers in the convex portion of the first surface is higher than the ratio of the polyurethane fibers in the concave portion of the first surface, and the ratio of the polyolefin fibers in the convex portion of the second surface The ratio of the polyurethane fibers in the recess of the second surface is higher.
並且,將不織布9之第2面之凸部及第2面之凹部的聚烯烴纖維之比率,藉由溶劑法進行評估。將第2面之凸部及第2面之凹部,分別採取67.7mg及39.8mg,使用二甲基乙醯胺20mL作為溶劑進行評估後,第2面之凸部及第2面之凹部的聚烯烴纖維之比率,分別為54質量%及43質量%。藉由該結果,在不織布9,可確認第2面之凸部中的聚烯烴纖維之比率,比第2面之凹部中的聚烯烴纖維之比率更高。 Further, the ratio of the polyolefin fibers of the convex portion of the second surface of the nonwoven fabric 9 and the concave portion of the second surface was evaluated by a solvent method. After the convex portion of the second surface and the concave portion of the second surface were taken as 67.7 mg and 39.8 mg, respectively, and 20 mL of dimethyl acetamide was used as a solvent, the convex portion of the second surface and the concave portion of the second surface were collected. The ratio of the olefin fibers was 54% by mass and 43% by mass, respectively. As a result, in the nonwoven fabric 9, it was confirmed that the ratio of the polyolefin fibers in the convex portion of the second surface was higher than the ratio of the polyolefin fibers in the concave portion of the second surface.
此外,測定紡黏不織布之聚烯烴纖維的比率,為50質量%。 Further, the ratio of the polyolefin fibers of the spunbonded nonwoven fabric was measured and found to be 50% by mass.
不織布7之MD方向之剖面的電子顯微鏡照片表示於第13圖。 An electron micrograph of the cross section of the nonwoven fabric 7 in the MD direction is shown in Fig. 13.
在表示搬運方向MD之剖面的第13圖標示有凸部6、凹部7,可知在凸部6,每單位面積之纖維量較多並且纖 維豎起,而且可知在凹部7,每單位面積之纖維量較少並且纖維倒下。 In the thirteenth icon showing the cross section of the conveyance direction MD, the convex portion 6 and the concave portion 7 are shown, and it is understood that the amount of fibers per unit area is large and the fiber is large in the convex portion 6. The erection is erected, and it is understood that in the recess 7, the amount of fibers per unit area is small and the fibers are fallen.
1‧‧‧包含伸長性纖維與伸縮性纖維之不織布 1‧‧‧Nonwoven fabric containing extensible fibers and stretchable fibers
2‧‧‧第1面 2‧‧‧ first side
3‧‧‧凸部 3‧‧‧ convex
4‧‧‧凹部 4‧‧‧ recess
5‧‧‧第2面 5‧‧‧2nd
6‧‧‧凸部 6‧‧‧ convex
7‧‧‧凹部 7‧‧‧ recess
8‧‧‧開孔部 8‧‧‧ Openings
9‧‧‧親水化劑 9‧‧‧Hydrophilizer
11‧‧‧齒輪延伸裝置 11‧‧‧ Gear extension
12,12’‧‧‧齒輪輥 12,12’‧‧‧ Gear Roller
13,13’‧‧‧外周面 13,13’‧‧‧ outer perimeter
14,14’‧‧‧複數齒 14,14'‧‧‧Multiple teeth
15‧‧‧包含伸長性纖維與伸縮性纖維之待處理的不織布 15‧‧‧Unwoven fabrics containing extensible fibers and stretchable fibers
16‧‧‧具有高延伸範圍與低延伸範圍的不織布 16‧‧‧Non-woven fabrics with high extension and low extension
17‧‧‧齒輪間距 17‧‧‧ Gear spacing
18‧‧‧齒輪咬入深度 18‧‧‧ Gear bite depth
19‧‧‧支撐體 19‧‧‧Support
20‧‧‧凸狀部 20‧‧‧ convex
21‧‧‧凹陷部 21‧‧‧Depression
22‧‧‧流體噴嘴 22‧‧‧ fluid nozzle
EX‧‧‧伸長性纖維 EX‧‧‧Elongated fiber
EL‧‧‧伸縮性纖維 EL‧‧‧Strainable fiber
A‧‧‧第1方向 A‧‧‧1st direction
B‧‧‧第2方向 B‧‧‧2nd direction
MD‧‧‧搬運方向 MD‧‧‧Transportation direction
CD‧‧‧正交方向 CD‧‧‧orthogonal direction
第1圖係本發明之包含伸長性纖維與伸縮性纖維之不織布的實施形態之一的示意圖。 Fig. 1 is a schematic view showing one embodiment of a non-woven fabric comprising an extensible fiber and a stretchable fiber of the present invention.
第2圖係本發明之包含伸長性纖維與伸縮性纖維之不織布之其他態樣的示意圖。 Fig. 2 is a schematic view showing another aspect of the nonwoven fabric comprising the extensible fiber and the stretchable fiber of the present invention.
第3圖係本發明之包含伸長性纖維與伸縮性纖維之不織布之另外態樣的示意圖。 Fig. 3 is a schematic view showing another aspect of the nonwoven fabric of the present invention comprising the extensible fiber and the stretchable fiber.
第4圖係本發明之包含伸長性纖維與伸縮性纖維之不織布之另外態樣的示意圖。 Fig. 4 is a schematic view showing another aspect of the nonwoven fabric of the present invention comprising an extensible fiber and a stretchable fiber.
第5圖係第1圖之X-X剖面中,本發明之包含伸長性纖維與伸縮性纖維之不織布的示意圖。 Fig. 5 is a schematic view showing a non-woven fabric comprising an extensible fiber and a stretchable fiber in the X-X cross section of Fig. 1;
第6圖係第2圖之X-X剖面及Y-Y剖面中,本發明之包含伸長性纖維與伸縮性纖維之不織布的示意圖。 Fig. 6 is a schematic view showing a non-woven fabric comprising an extensible fiber and a stretchable fiber in the X-X cross section and the Y-Y cross section of Fig. 2;
第7圖係用於說明齒輪延伸的示意圖。 Fig. 7 is a schematic view for explaining the extension of the gear.
第8圖係用於說明齒輪延伸的示意圖。 Fig. 8 is a schematic view for explaining the extension of the gear.
第9圖係用於說明齒輪延伸的示意圖。 Fig. 9 is a schematic view for explaining the extension of the gear.
第10圖係表示在輸送帶上使用,用以支撐不織布之支撐體的一例。 Fig. 10 is a view showing an example of a support used for supporting a non-woven fabric on a conveyor belt.
第11圖係用於說明使用第8圖所示之支撐體所形成,具有凹凸的不織布。 Fig. 11 is a view showing a non-woven fabric having irregularities formed by using the support shown in Fig. 8.
第12圖係表示在輸送帶上使用,用以支撐不織布之 支撐體的其他例子。 Figure 12 shows the use on a conveyor belt to support non-woven fabrics. Other examples of supports.
第13圖係在實施例1形成之不織布2在方向MD之剖面的顯微鏡照片。 Fig. 13 is a photomicrograph of a cross section of the nonwoven fabric 2 formed in Example 1 in the direction MD.
1‧‧‧包含伸長性纖維與伸縮性纖維之不織布 1‧‧‧Nonwoven fabric containing extensible fibers and stretchable fibers
2‧‧‧第1面 2‧‧‧ first side
3‧‧‧凸部 3‧‧‧ convex
4‧‧‧凹部 4‧‧‧ recess
5‧‧‧第2面 5‧‧‧2nd
EX‧‧‧伸長性纖維 EX‧‧‧Elongated fiber
EL‧‧‧伸縮性纖維 EL‧‧‧Strainable fiber
A‧‧‧第1方向 A‧‧‧1st direction
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