TWI745639B - Absorbent articles - Google Patents
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- TWI745639B TWI745639B TW107142294A TW107142294A TWI745639B TW I745639 B TWI745639 B TW I745639B TW 107142294 A TW107142294 A TW 107142294A TW 107142294 A TW107142294 A TW 107142294A TW I745639 B TWI745639 B TW I745639B
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
- A61F13/00—Bandages or dressings; Absorbent pads
- A61F13/15—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators
- A61F13/53—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators characterised by the absorbing medium
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
- A61F13/00—Bandages or dressings; Absorbent pads
- A61F13/15—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators
- A61F13/53—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators characterised by the absorbing medium
- A61F13/534—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators characterised by the absorbing medium having an inhomogeneous composition through the thickness of the pad
- A61F13/535—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators characterised by the absorbing medium having an inhomogeneous composition through the thickness of the pad inhomogeneous in the plane of the pad, e.g. core absorbent layers being of different sizes
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
- A61F13/00—Bandages or dressings; Absorbent pads
- A61F13/15—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators
- A61F13/53—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators characterised by the absorbing medium
- A61F13/534—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators characterised by the absorbing medium having an inhomogeneous composition through the thickness of the pad
- A61F13/537—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators characterised by the absorbing medium having an inhomogeneous composition through the thickness of the pad characterised by a layer facilitating or inhibiting flow in one direction or plane, e.g. a wicking layer
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
- A61F13/00—Bandages or dressings; Absorbent pads
- A61F13/15—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators
- A61F13/53—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators characterised by the absorbing medium
- A61F13/538—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators characterised by the absorbing medium characterised by specific fibre orientation or weave
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
- A61F5/00—Orthopaedic methods or devices for non-surgical treatment of bones or joints; Nursing devices; Anti-rape devices
- A61F5/44—Devices worn by the patient for reception of urine, faeces, catamenial or other discharge; Portable urination aids; Colostomy devices
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- Health & Medical Sciences (AREA)
- Epidemiology (AREA)
- Engineering & Computer Science (AREA)
- Biomedical Technology (AREA)
- Heart & Thoracic Surgery (AREA)
- Vascular Medicine (AREA)
- Life Sciences & Earth Sciences (AREA)
- Animal Behavior & Ethology (AREA)
- General Health & Medical Sciences (AREA)
- Public Health (AREA)
- Veterinary Medicine (AREA)
- Nursing (AREA)
- Orthopedic Medicine & Surgery (AREA)
- Absorbent Articles And Supports Therefor (AREA)
- Orthopedics, Nursing, And Contraception (AREA)
Abstract
本發明之吸收性物品(1)具備吸收體(4)、及配置於該吸收體(4)之肌膚對向面側之正面片材(2)。吸收體(4)係包含液體吸收性之吸收性芯體(40)、及被覆該吸收性芯體(40)之肌膚對向面之包芯片材(41)而構成。吸收性芯體(40)包含吸水性纖維(12F)、及含有吸水性低於該吸水性纖維(12F)之弱吸水性之纖維(11F)的纖維塊(11)。吸收性芯體(40)之液體擴散面積與包芯片材(41)之液體擴散面積之比率以前者/後者計為0.7以上。The absorbent article (1) of the present invention includes an absorber (4) and a front sheet (2) arranged on the skin facing side of the absorber (4). The absorbent body (4) is composed of a liquid-absorbent absorbent core (40) and a core-coated material (41) covering the skin facing surface of the absorbent core (40). The absorbent core (40) comprises a water-absorbent fiber (12F), and a fiber block (11) containing a weakly water-absorbent fiber (11F) having lower water absorption than the water-absorbent fiber (12F). The ratio of the liquid diffusion area of the absorbent core (40) to the liquid diffusion area of the core-coating material (41) is 0.7 or more in terms of the former/the latter.
Description
本發明係關於一種經期衛生棉等吸收性物品。 The present invention relates to an absorbent article such as a menstrual sanitary napkin.
一般而言,拋棄式尿布、經期衛生棉等吸收性物品包含配置於相對接近穿著者之肌膚之位置之正面片材、配置於相對遠離穿著者之肌膚之位置之背面片材、及介介置於兩片材間之吸收體而構成。典型而言,該吸收體包含構成該吸收體之主體之吸收性芯體、及被覆該吸收性芯體之表面之包芯片材,該吸收性芯體多數情況下以木漿等吸水性纖維為主體,進而包含吸水性聚合物粒子而構成。關於用於吸收性物品之吸收體,柔軟性(緩衝性)、壓縮回覆性、保形性等各特性之提高為較大之課題。 Generally speaking, disposable diapers, menstrual sanitary napkins and other absorbent articles include a front sheet that is relatively close to the wearer's skin, a back sheet that is relatively far away from the wearer's skin, and an intermediary. It is composed of an absorbent body between two sheets. Typically, the absorbent body includes an absorbent core constituting the main body of the absorbent body, and a core-cladding material covering the surface of the absorbent core. In most cases, the absorbent core is made of absorbent fibers such as wood pulp. The main body is further composed of water-absorbing polymer particles. With regard to absorbents used in absorbent articles, improvement of various properties such as flexibility (cushioning properties), compression recovery properties, and shape retention properties is a major issue.
作為吸收體之改良技術,例如,專利文獻1中記載有一種吸收體,其含有熱塑性樹脂纖維及纖維素系吸水性纖維,該熱塑性樹脂纖維於該吸收體之正面片材側之表面及該吸收體之背面片材側之表面之兩者露出。根據專利文獻1所記載之吸收體,熱塑性樹脂纖維作為用以保持纖維素系吸水性纖維等該吸收體之其他成分之骨架而發揮功能,故而較柔軟且不易褶皺。
As an improvement technique of an absorber, for example,
又,專利文獻2中記載有一種吸收體,其含有包含熱熔纖維且預先使纖維間結合而賦予三維構造之不織布片、及吸水性纖維。該三維構造之不織布片使用切碎機粉碎方式等粉碎方法將不織布粉碎為碎片狀而製造,故而因該製造方法,而導致其如同一文獻之圖1及圖3中所記載般
呈不定形狀,實質上不具有視為平面之部分。於專利文獻2中,作為同一文獻中記載之吸收體之較佳之形態,記載有使不織布片彼此熱熔而成者。根據專利文獻2所記載之吸收體,不織布片具有三維構造,故而於該吸收體內部形成有空隙,吸收水分時之恢復性提高,其結果為,吸水性能提高。
In addition,
又,專利文獻3中記載有具有相對較稠密之微細纖維核、及自該核向外側延出之纖維或纖維束之微細纖維網,又,記載有,將該微細纖維網與木漿或吸水性聚合物粒子混合而成之不織纖維網可用作吸收性物品用之吸收體。該微細纖維網係將不織布等原料片材揪下或撕下而製造,與專利文獻2所記載之不織布片同樣地呈不定形狀,實質上不具有視為平面之部分。
In addition,
又,專利文獻4中記載有,於吸收體含有吸水性聚合物之情形時,若該吸收體吸收液體而膨脹,則因配置於該吸收體之上下之正面片材及背面片材之密封而妨礙該吸水性聚合物之膨潤,為了解決該問題,使具有高壓縮/壓縮回覆性及液體透過性之緩衝層介置於正面片材與吸收體之間,又,記載有作為不織布之碎片之集合體而構成該緩衝層、及將緩衝層之厚度設為10~40mm。於專利文獻4中,關於用於緩衝層之不織布之碎片之形狀等,並未具體記載。
In addition,
[專利文獻1]日本專利特開2015-16296號公報 [Patent Document 1] Japanese Patent Laid-Open No. 2015-16296
[專利文獻2]日本專利特開2002-301105號公報 [Patent Document 2] Japanese Patent Laid-Open No. 2002-301105
[專利文獻3]日本專利特開平1-156560號公報 [Patent Document 3] Japanese Patent Laid-Open No. 1-156560
[專利文獻4]日本專利特開2003-52750號公報 [Patent Document 4] Japanese Patent Laid-Open No. 2003-52750
本發明係關於一種吸收性物品,其具有與穿著者之前後方向對應之縱向及與其正交之橫向,且具備吸收體、及配置於該吸收體之肌膚對向面側之正面片材。上述吸收體包含液體吸收性之吸收性芯體、及被覆該吸收性芯體之肌膚對向面之包芯片材而構成,該吸收性芯體包含:吸水性纖維;及纖維塊,其包含吸水性低於該吸水性纖維之弱吸水性之纖維。由下述方法測得之上述吸收性芯體之液體擴散面積與由下述方法測得之上述包芯片材之液體擴散面積之比率以前者/後者計為0.7以上。 The present invention relates to an absorbent article, which has a longitudinal direction corresponding to the front and rear directions of the wearer and a transverse direction orthogonal thereto, and is provided with an absorber and a front sheet disposed on the skin facing side of the absorber. The absorbent body includes a liquid-absorbent absorbent core and a core-clad material covering the skin facing surface of the absorbent core. The absorbent core includes: water-absorbent fibers; and fiber blocks, which include water-absorbent fibers. It is a weakly absorbent fiber with lower properties than the absorbent fiber. The ratio of the liquid diffusion area of the absorbent core measured by the following method to the liquid diffusion area of the core-coated sheet measured by the following method is 0.7 or more.
<液體擴散面積之測定方法> <Measurement method of liquid diffusion area>
於相對於水平面具有45°之角度之斜面上,將測定對象以使其肌膚對向面朝向該斜面之方式固定,耗費23秒鐘將1.5g脫纖維馬血注入至測定對象之肌膚對向面,放置3分鐘後,再次進行耗費相同時間將同量之脫纖維馬血注入至相同注入部位之操作。反覆進行6次該脫纖維馬血之注入、放置操作,將合計9g之脫纖維馬血注入至測定對象。注入操作完成後,對測定對象之肌膚對向面中之脫纖維馬血之擴散面積進行測定,並將其作為該測定對象之液體擴散面積。 On an inclined surface having an angle of 45° with respect to the horizontal plane, the measurement object is fixed so that the opposite side of the skin faces the inclined surface, and it takes 23 seconds to inject 1.5 g of defibrinated horse blood into the opposite surface of the measured object’s skin. , After standing for 3 minutes, perform the operation of injecting the same amount of defibrinated horse blood into the same injection site again for the same time. This defibrillated horse blood was injected and placed six times repeatedly, and a total of 9 g of defiberized horse blood was injected into the measurement object. After the injection operation is completed, the diffusion area of the defibrinated horse blood in the opposite surface of the skin of the measurement object is measured, and it is taken as the liquid diffusion area of the measurement object.
1:衛生棉 1: Sanitary napkin
2:正面片材 2: Front sheet
3:背面片材 3: Back sheet
4:吸收體 4: Absorber
5:吸收性本體 5: Absorbent body
5W:翼部 5W: Wing
6:側部片材 6: Side sheet
7:凹陷部 7: Depressed part
10bs:原料纖維片材 10bs: raw fiber sheet
11:纖維塊 11: Fiber block
11A:纖維塊 11A: Fiber block
11B:纖維塊 11B: Fiber block
11F:纖維 11F: Fiber
11Z:重疊部 11Z: Overlap
12F:吸水性纖維 12F: Absorbent fiber
40:吸收性芯體 40: Absorbent core
41:包芯片材 41: package chip material
100:測定台 100: measuring station
100a:斜面 100a: inclined plane
101:丙烯酸系樹脂板 101: Acrylic resin board
110:本體部 110: body part
111:基本面 111: Fundamentals
111a:短邊 111a: short side
111b:長邊 111b: Long side
112:骨架面 112: Skeleton surface
113:延出纖維部 113: Extend the fiber part
113S:延出纖維束部 113S: Extend the fiber bundle part
A:前方區域 A: Front area
B:縱中央區域 B: Vertical central area
BL:邊界 BL: Border
C:後方區域 C: Rear area
D1:第1方向 D1: 1st direction
D2:第2方向 D2: 2nd direction
F:外力 F: External force
L1:長度 L1: length
L1a:間隔 L1a: interval
L2:長度 L2: length
L2a:間隔 L2a: interval
S:測定對象 S: Measurement object
T:厚度 T: thickness
X:縱向 X: portrait
Y:橫向 Y: horizontal
Z:厚度方向 Z: thickness direction
圖1係使作為本發明之吸收性物品之一實施形態之經期衛生棉之一例之肌膚對向面側(正面片材側)一部分斷裂並模式性地表示之俯視圖。 Fig. 1 is a plan view schematically showing a part of the skin facing side (front sheet side) of the menstrual sanitary napkin as an embodiment of the absorbent article of the present invention.
圖2係模式性地表示圖1之I-I線剖面之橫截面圖。 Fig. 2 is a schematic cross-sectional view of the I-I line section of Fig. 1.
圖3係圖1所示之吸收性物品所具備之吸收性芯體之一部分之模式性 立體圖。 Figure 3 is a schematic diagram of a part of the absorbent core of the absorbent article shown in Figure 1 Stereograph.
圖4係模式性地表示圖3所示之吸收性芯體之壓縮時之變形狀態之圖。 Fig. 4 is a diagram schematically showing the deformed state of the absorbent core shown in Fig. 3 when compressed.
圖5之圖5(a)及圖5(b)分別係本發明之纖維塊中之本體部之模式性立體圖。 Figures 5(a) and 5(b) of Figure 5 are respectively schematic perspective views of the main body of the fiber block of the present invention.
圖6係本發明之纖維塊之製造方法之說明圖。 Fig. 6 is an explanatory diagram of the method of manufacturing the fiber block of the present invention.
圖7之圖7(a)係本發明之纖維塊之實例之電子顯微鏡照片(觀察倍率25倍),圖7(b)係模式性地表示該電子顯微鏡照片之纖維塊作為圖2所示之吸收體中包含之纖維塊之圖。 Fig. 7(a) is an electron micrograph of an example of the fiber mass of the present invention (observation magnification 25 times), and Fig. 7(b) schematically shows the fiber mass of the electron micrograph as shown in Fig. 2. A diagram of the fiber block contained in the absorbent body.
圖8係液體擴散面積之測定方法之說明圖。 Fig. 8 is an explanatory diagram of the measuring method of the liquid diffusion area.
專利文獻1所記載之吸收體除了含有纖維素系吸水性纖維以外進而含有合成纖維(熱塑性樹脂纖維),故而與僅含有纖維素系吸水性纖維作為構成纖維之吸收體相比,剛性更高,因此可期待緩衝性、壓縮回覆性等各特性之提高,但所含有之複數條合成纖維各自獨立存在,並非形成聚集之1個塊,故而該等各特性之提高效果不充分,因此,在應用於吸收性物品之情形時,有易於發生褶皺而服貼性變得不充分之虞,尤其於尿、經血等體液之吸收後,此種不良狀況之發生較顯著。
The absorbent body described in
另一方面,專利文獻2至4所記載之吸收體所含有之合成纖維均為被稱為不織布片或微細纖維網等之合成纖維集合體,故而可期待緩衝性之提高等。但是,根據本發明者之見解,若多個此種弱吸水性之合成纖維集合體包含於吸收體中,則吸收體之液體透過性降低,其結果為,透過正面片材而到達吸收體之肌膚對向面(包芯片材)之體液難以被引入至吸
收體(吸收性芯體)內,體液大量殘留於吸收體之肌膚對向面,而成為不舒適之肌膚之黏膩或濕潤感之原因。於專利文獻2至4中未記載有起因於弱吸水性之合成纖維集合體之吸收體之問題,尚未提供一面活用合成纖維集合體之優點一面解決該問題之技術。
On the other hand, the synthetic fibers contained in the absorbent bodies described in
因此,本發明係關於一種具備具有對吸收性芯體之較高之液體透過性且緩衝性優異之吸收體之吸收性物品。 Therefore, the present invention relates to an absorbent article having an absorbent body with high liquid permeability to an absorbent core and excellent cushioning properties.
以下,針對本發明,一面參照圖式,一面基於其較佳之實施形態進行說明。圖1及圖2表示作為本發明之吸收性物品之一實施形態之經期衛生棉1。衛生棉1具備:吸收體4,其吸收保持體液;液體透過性之正面片材2,其配置於該吸收體4之肌膚對向面側,且可與穿著者之肌膚接觸;及液體難透過性之背面片材3,其配置於該吸收體4之非肌膚對向面側。如圖1所示,衛生棉1具有與穿著者之前後方向對應且自穿著者之腹側經由胯間部向背側延伸之縱向X、及與其正交之橫向Y,又,於縱向X上,分為如下3個區域:縱中央區域B,其包含與穿著者之陰道口等排泄部對向之排泄部對向部(排泄點);前方區域A,其配置於較該排泄部對向部更靠穿著者之腹側(前側);及後方區域C,其配置於較該排泄部對向部更靠穿著者之背側(後側)。
Hereinafter, the present invention will be described with reference to the drawings and based on its preferred embodiments. Fig. 1 and Fig. 2 show a menstrual
於本說明書中,「肌膚對向面」係吸收性物品或其構成構件(例如,吸收體4)中之吸收性物品之穿著時朝向穿著者之肌膚側之面,即相對靠近穿著者之肌膚之側,「非肌膚對向面」係吸收性物品或其構成構件中之吸收性物品之穿著時朝向與肌膚側相反之側即相對遠離穿著者之肌膚之側之面。再者,此處所言之「穿著時」意指維持通常之適當之穿著位置即該吸收性物品之正確之穿著位置之狀態。 In this specification, the "skin facing surface" refers to the surface of the absorbent article or its constituent members (for example, absorber 4) facing the wearer's skin when worn, that is, relatively close to the wearer's skin The "non-skin facing surface" refers to the surface of the absorbent article or the absorbent article of its constituent members that faces the side opposite to the skin side when worn, that is, the side relatively far away from the wearer's skin. Furthermore, the "wearing time" mentioned here means the state of maintaining the usual proper wearing position, that is, the correct wearing position of the absorbent article.
如圖1所示,衛生棉1具有:吸收性本體5,其為縱向X上較長之形狀;及一對翼(wing)部5W、5W,其等自吸收性本體5中之縱中央區域B之沿縱向X之兩側部各者向橫向Y之外側延出。吸收性本體5係構成衛生棉1之主體之部分,具備上述正面片材2、背面片材3及吸收體4,於縱向X上分為前方區域A、縱中央區域B及後方區域C之3個區域。
As shown in Figure 1, the
再者,於吸收性物品如衛生棉1般具有翼部之情形時,本發明之吸收性物品中之縱中央區域意指於該吸收性物品之縱向(長度方向,圖中之X方向)上具有翼部之區域,以衛生棉1為例,其係被一翼部5W之沿縱向X之根部與另一翼部5W之沿縱向X之根部所夾之區域。又,不具有翼部之吸收性物品中之縱中央區域意指將吸收性物品於縱向三等分時位於中間之區域。
Furthermore, when the absorbent article has wings like
吸收體4係包含液體吸收性之吸收性芯體40、及被覆該吸收性芯體40之至少肌膚對向面之液體透過性之包芯片材41而構成。吸收性芯體40與吸收性本體5同樣地於如圖1所示之俯視下呈縱向X上較長之形狀,吸收性芯體40之長度方向與衛生棉1之縱向X一致,吸收性芯體40之寬度方向與衛生棉1之橫向Y一致。吸收性芯體40與包芯片材41之間亦可藉由熱熔型接著劑等接著劑接合。
The
於衛生棉1中,包芯片材41係具有吸收性芯體40之橫向Y之長度之2倍以上且3倍以下之寬度之1片連續之片材,如圖2所示,被覆吸收性芯體40之肌膚對向面之全域,且自吸收性芯體40之沿縱向X之兩側緣向橫向Y之外側延出,其延出部向吸收性芯體40之下方捲下,且被覆吸收性芯體40之非肌膚對向面之全域。再者,於本發明中,包芯片材亦可並非此種1片片材,例如,亦可包含被覆吸收性芯體40之肌膚對向面之1片肌
膚側包芯片材、及與該肌膚側包芯片材不同體且被覆吸收性芯體40之非肌膚對向面之1片非肌膚側包芯片材之2片片材而構成。
In the
如圖2所示,正面片材2被覆吸收體4之肌膚對向面之全域。另一方面,背面片材3被覆吸收體4之非肌膚對向面之全域,進而,自吸收體4之沿縱向X之兩側緣向橫向Y之外側延出,與下述側部片材6一併形成側翼(side flap)部(包含自吸收體4向橫向Y之外側延出之構件之部分)。背面片材3與側部片材6於自吸收體4之沿縱向X之兩側緣之延出部藉由接著劑、熱密封、超音波密封等公知之接合方法而相互接合。正面片材2及背面片材3各者與吸收體4之間亦可藉由接著劑接合。作為正面片材2、背面片材3,可無特別限制地使用先前用於經期衛生棉等吸收性物品之各種片材。例如,作為正面片材2,可使用單層或多層構造之不織布、或開孔膜等。作為背面片材3,可使用透濕性之樹脂膜等。
As shown in FIG. 2, the
如圖1所示,上述側翼部於縱中央區域B中向橫向Y之外側大幅突出,藉此,於吸收性本體5之沿縱向X之左右兩側延設有一對翼部5W、5W。翼部5W於如圖1所示之俯視下具有下底(長於上底之邊)位於吸收性本體5之側部側之大致梯形形狀,於其非肌膚對向面形成有將該翼部5W固定於短褲等衣物之翼部黏著部(未圖示)。翼部5W回折至短褲等衣物之褲襠部之非肌膚對向面(外表面)側而使用。上述翼部黏著部於其使用前被包含膜、不織布、紙等之剝離片材(未圖示)被覆。又,於吸收性本體5之肌膚對向面即正面片材2之肌膚對向面中之沿縱向X之兩側部,一對側部片材6、6以於俯視下與吸收體4之沿縱向X之左右兩側部重疊之方式遍及吸收性本體5之縱向X之大致全長而配置。一對側部片材6、6分別利用在縱向X上延伸之未圖示之接合線並藉由接著劑等公知之接合方法而接合
於正面片材2等其他構件。
As shown in FIG. 1, the above-mentioned side flaps largely protrude to the outside of the transverse direction Y in the longitudinal central region B, whereby a pair of
如圖1及圖2所示,於吸收體4之肌膚對向面,局部地形成有包芯片材41及吸收性芯體向該吸收體4之非肌膚對向面側一體地凹陷之凹陷部7。凹陷部7係藉由針對衛生棉1自其肌膚對向面即正面片材側實施壓擠加工而形成,就其形成方法而言,亦可稱為「壓擠部」。作為壓擠加工,可利用公知之方法,例如,可列舉伴有熱或不伴有熱之壓紋加工、或超音波壓紋等。凹陷部7因其形成方法而使得正面片材2、包芯片材41及吸收性芯體40向該吸收性芯體40之非肌膚對向面側(背面片材3側)一體地凹陷。又,凹陷部7因其形成方法而使得與其周邊部(凹陷部7之非形成部)相比密度更高。即,吸收性本體5具有與凹陷部7對應之高密度部、及與非凹陷部對應之低密度部。於凹陷部7之底部,存在正面片材2、包芯片材41及吸收性芯體40熱熔而一體化之情況。
As shown in FIGS. 1 and 2, on the skin-facing surface of the
如圖1所示,凹陷部7至少形成於縱中央區域B,更具體而言,自前方區域A之靠縱中央區域B之部分遍及至後方區域C之靠縱中央區域B之部分於縱向X上連續。於衛生棉1中,凹陷部7於如圖1所示之俯視下呈線狀,又,該線狀之凹陷部7於俯視下呈閉合之環狀。環狀之凹陷部7於俯視下呈縱向X上較長之形狀,其長度方向與縱向X一致。環狀之凹陷部7於前方區域A及後方區域C各者中形成為朝向縱向X之外側凸出之U字狀或弧狀,該U字狀或弧狀之頂部位於衛生棉1之橫向Y之中央。又,環狀之凹陷部7於縱中央區域B中形成為於縱向X上延伸之左右一對線狀。如此,凹陷部7以包圍縱中央區域B之橫向Y之中央部之方式形成。
As shown in FIG. 1, the
於衛生棉1中,凹陷部7之深度(距正面片材2中之未凹陷之肌膚對向面之深度)遍及其長度方向之全長而成為固定。凹陷部7之深度可
設定為與此種吸收性物品中之防漏槽之深度同樣之範圍,通常為1~10mm左右。作為可藉由凹陷部7之形成而期待之效果,可列舉:抑制吸收體4之平面方向、尤其是橫向Y之液體之擴散,防止吸收體4之褶皺等。再者,線狀之凹陷部7之形狀、配置等並不限於圖示之形態,可與此種吸收性物品中被稱為防漏槽等者同樣地設定,俯視形狀包含直線及/或曲線而構成,各線可為連續線,亦可為虛線(深度不同之2種部分交替配置於線狀之凹陷部延伸之方向之形態)。
In the
作為衛生棉1之主要特徵部分之一,可列舉吸收性芯體40。圖3表示吸收性芯體40之一部分(凹陷部7之非形成部)。如圖2及圖3所示,吸收性芯體40包含含有複數條纖維(弱吸水性之合成纖維)11F之纖維塊11、及吸水性纖維12F。纖維塊11係纖維11F刻意地以塊狀集聚而一體化之纖維集合體,相對於此,吸水性纖維12F不刻意地一體化而以可各自獨立地存在之狀態存在於吸收性芯體40中。纖維塊11主要有助於吸收性芯體40之柔軟性、緩衝性、壓縮回覆性、保形性等之提高。另一方面,吸水性纖維12F主要有助於吸收性芯體40之液體吸收性及保形性等之提高。再者,吸收性芯體40係實質上亦可謂吸收體4其本身者,以下之關於吸收性芯體40之說明只要無特別說明,則作為吸收體4之說明而適當應用。即,本發明包含吸收體不含包芯片材而僅由吸收性芯體形成之情況,此時,於此情形時,吸收體與吸收性芯體為相同意義。
As one of the main characteristic parts of the
於本說明書中,「纖維塊」係指複數條纖維聚集而成為一體之纖維集合體。作為纖維塊之形態,例如可列舉自具有固定大小之合成纖維片材分割成之薄片。作為纖維塊,尤其較佳為選擇不織布作為合成纖維片材並自該不織布剪切為特定之大小及形狀之不織布片。 In this specification, "fiber block" refers to a fiber assembly in which a plurality of fibers are gathered to form a single unit. As the form of the fiber block, for example, a sheet divided from a synthetic fiber sheet having a fixed size can be cited. As the fiber block, it is particularly preferable to select a non-woven fabric as a synthetic fiber sheet and cut from the non-woven fabric into a non-woven fabric sheet of a specific size and shape.
如此,作為本發明之纖維塊之較佳之一實施形態之薄片狀之纖維塊並非以使複數條纖維集聚而形成該薄片之方式構成,而藉由尺寸大於該薄片之纖維片材(較佳為不織布)之切斷而製造(參照圖6)。本發明之吸收體所含有之複數個纖維塊係與由如專利文獻1及2之先前技術製造者相比定形性更高之複數個薄片狀之纖維塊。
In this way, the sheet-like fiber block, which is a preferred embodiment of the fiber block of the present invention, is not constructed in a way that a plurality of fibers are gathered to form the sheet, but is made of a fiber sheet (preferably Non-woven fabric) is cut and manufactured (refer to Figure 6). The plurality of fiber blocks contained in the absorbent body of the present invention are a plurality of sheet-like fiber blocks with higher shape stability than those of the prior art manufacturers such as
然而,如專利文獻1~4所記載般之包含弱吸水性之合成纖維集合體之吸收性芯體如上所述般液體透過性較低,因此,關於使用其之吸收體,體液易於殘留於被覆該吸收性芯體之肌膚對向面之肌膚側包芯片材之肌膚對向面,其結果為,有導致不舒適之肌膚之黏膩或濕潤感之發生之虞。為了解決此種起因於弱吸水性之纖維之使用之問題,本發明者進行了各種研究,結果獲得了如下見解:有效方法為,將吸收體中通常最先與體液接觸之肌膚側包芯片材之面方向上之液體擴散性在同與該肌膚側包芯片材抵接之吸收性芯體之面方向上之液體擴散性之關係中設定為特定範圍。
However, as described in
基於上述見解,於衛生棉1中,將由上述<液體擴散面積之測定方法>測得之吸收性芯體40之液體擴散面積與由同一測定方法測得之肌膚側包芯片材41之液體擴散面積之比率(以下,亦稱為「液體擴散面積比率」)以前者/後者計設為0.7以上。若液體擴散面積比率為0.7以上,則易於順利地進行體液自肌膚側包芯片材41向吸收性芯體40之移動,體液不易殘留於肌膚側包芯片材41之肌膚對向面,可減少不舒適之肌膚之黏膩或濕潤感。就更順利地進行體液自肌膚側包芯片材41向吸收性芯體40之移動之觀點而言,液體擴散面積比率較佳為0.75以上,進而較佳為0.8以上,並且,較佳為2.0以下,進而較佳為1.5以下。
Based on the above findings, in the
參照圖8,對上述<液體擴散面積之測定方法>進行補充,測定對象S(吸收性芯體、包芯片材)設為240mm×75mm之俯視四邊形形狀。用於測定之測定台100具有與水平面所成之角度θ為45°之斜面100a。將測定對象S以其肌膚對向面與斜面100a對向之方式載置於斜面100a之上,進而,於其測定對象S之上載置面積大於測定對象S之厚度3mm之丙烯酸系樹脂板101。作為模擬血液注入至測定對象S之脫纖維馬血係使用B型黏度計(東機產業股份有限公司製造,型號TVB-10M,測定條件:轉子No.19、30rpm、25℃、60秒鐘)測得之黏度為8mPa.s者。作為此種脫纖維馬血,例如可使用股份有限公司NIPPON BIOTEST研究所製造之脫纖維馬血,可藉由視需要調整血球、血漿比率等而將黏度調整為上述特定之範圍。測定對象S中之脫纖維馬血之注入位置設為測定對象S之肌膚對向面之中心部(圖8中,箭頭所示之部分),使用未圖示之微型管泵(東京理化器械股份有限公司製造)注入。於該泵連結有未圖示之管,該管之同與該泵之連結側相反之側之端部連結於斜面100a上之測定對象S,脫纖維馬血通過該管而注入至測定對象S。測定對象S之肌膚對向面中之脫纖維馬血之擴散面積可藉由利用OHP(Overhead projector,高架式投影機)片材轉印測定對象S中之脫纖維馬血之分佈區域,並根據慣例使用圖像解析軟體NexusNewQube(Nexus公司製造)對該OHP片材進行處理而測定。
Referring to FIG. 8, the above-mentioned "Method for Measuring Liquid Spreading Area" is supplemented, and the measurement object S (absorbent core, core-clad material) is set to have a quadrilateral shape in plan view of 240 mm×75 mm. The measuring table 100 used for the measurement has an
為了如上所述般將液體擴散面積比率設為0.7以上,需要對吸收性芯體40及肌膚側包芯片材41之兩者或一者之組成等想辦法。想辦法提高肌膚側包芯片材41之液體透過性效果尤其高。就該觀點而言,肌膚側包芯片材41較佳為以紙漿為主體之多孔性片材。再者,本說明書中之關
於「肌膚側包芯片材」之說明只要無特別說明,則亦應用於1片連續片材即包芯片材41中之其他部分,例如,形成吸收體4之非肌膚對向面即介置配置於背面片材3與吸收性芯體40之間之非肌膚側包芯片材。
In order to set the liquid diffusion area ratio to 0.7 or more as described above, it is necessary to think about the composition of both or one of the
作為較佳地作為肌膚側包芯片材41之上述多孔性片材,可例示以紙漿為主體之紙漿片材。作為該紙漿片材,藉由濕式造紙法製造之紙為典型者。作為上述多孔性片材之主成分即紙漿,可使用纖維素系纖維,例如,可列舉:針葉樹曬乾牛皮紙漿(NBKP)、闊葉樹曬乾牛皮紙漿(LBKP)、針葉樹曬乾亞硫酸鹽紙漿(NBSP)、熱機械紙漿(TMP)等木漿;構樹、結香、剪夏羅等韌皮纖維;槁、竹子、洋麻、麻等非木漿等,可單獨使用其等之1種或組合2種以上而使用。上述多孔性片材中之紙漿之含量較佳為10質量%以上,進而較佳為50質量%以上。上述多孔性片材亦可包含除紙漿以外之成分,亦可包含其他成分,作為該其他成分,例如,可列舉:滑石等填料、染料、著色顏料、紙力增強劑、抗菌劑、pH調整劑、良率提高劑、耐水化劑、消泡劑等一般用作造紙用原材料或添加物者,可單獨使用其等之1種或組合2種以上而使用。
As the above-mentioned porous sheet which is preferable as the skin-side
又,就提高肌膚側包芯片材41(上述多孔性片材)之液體透過性之觀點而言,肌膚側包芯片材41之密度較佳為設為0.1g/m3以下,尤其較佳為設為0.08g/m3以下。再者,較佳為,肌膚側包芯片材41之密度較佳為0.02g/m3以上,進而較佳為0.04g/m3以上,其原因在於,易於維持充分之片材強度。
Moreover, from the viewpoint of improving the liquid permeability of the skin-side core-encapsulation material 41 (the above-mentioned porous sheet), the density of the skin-side core-
又,就液體透過性與強度之平衡等觀點而言,肌膚側包芯片材41(上述多孔性片材)之基重較佳為5g/m2以上,進而較佳為10g/m2以上,並且,較佳為50g/m2以下,進而較佳為30g/m2以下。 In addition, from the viewpoint of the balance between liquid permeability and strength, the basis weight of the skin-side core covering material 41 (the above-mentioned porous sheet) is preferably 5 g/m 2 or more, and more preferably 10 g/m 2 or more. In addition, it is preferably 50 g/m 2 or less, and more preferably 30 g/m 2 or less.
於衛生棉1中,如上所述,如圖1及圖2所示,於吸收體4之肌膚對向面形成有包芯片材41(更具體而言,為肌膚側包芯片材41)及吸收性芯體40向該吸收體4之非肌膚對向面側一體地凹陷之凹陷部7,此時,藉由該構成,對於衛生棉1之穿著者之體壓或動作,吸收體4之形狀進一步變穩定,可期待衛生棉1之服貼性等之進一步提高。又,僅吸收體4(吸收性芯體40)之一部分形成有凹陷部7,如下所述,占吸收性芯體40之大部分之凹陷部7之非形成部藉由構成纖維彼此交絡而具有保形性,起因於該情況等,其柔軟且具有緩衝性,故而衛生棉1實質上可直接顯現該凹陷部7之非形成部之特點。就吸收體4之形狀穩定性與緩衝性等之平衡之觀點而言,凹陷部7之總面積占吸收體4(吸收性芯體40)之肌膚對向面之總面積之比率(凹陷部佔有率)較佳為3%以上,進而較佳為5%以上,並且,較佳為97%以下,進而較佳為95%以下。
In the
又,於衛生棉1中,如圖1所示,凹陷部7以包圍縱中央區域B之橫向Y之中央部之方式形成,藉此,更進一步提高該縱中央區域B之中央部之形狀穩定性。被該凹陷部7包圍之縱中央區域B之中央部通常為包含上述排泄部對向部(排泄點)之部分,為最先承接衛生棉1之穿著者所排泄之體液並使其擴散之重要部分,此時,該重要部分之形狀穩定性較高,藉此,可期待液體吸收性(防漏性)、服貼性、穿著感等各特性之更進一步提高。
In addition, in the
以下,對吸收性芯體40進一步進行說明。
Hereinafter, the
於吸收性芯體40中,複數個纖維塊11彼此或纖維塊11與吸水性纖維12F相互交絡。於本實施形態之吸收性芯體40中,複數個纖維塊11藉由與吸收性芯體40中之構成纖維(纖維11F、12F)之相互纏繞而結合,而形成1
個纖維塊連續體。又,亦可複數個纖維塊11彼此交絡,並且纖維塊11與吸水性纖維12F交絡而結合。進而,通常,複數條吸水性纖維12F彼此亦相互交絡。吸收性芯體40中含有之複數個纖維塊11之至少一部分與其他纖維塊11或吸水性纖維12F交絡。於吸收性芯體40中,可能存在其中含有之複數個纖維塊11全部相互交絡而形成1個纖維塊連續體之情況,或者可能存在複數個纖維塊連續體相互以非結合之狀態混合存在之情況。纖維塊11之交絡性即與其他纖維塊11或吸水性纖維12F之交絡之容易度很大程度上取決於纖維塊11所具有之下述延出纖維部113之形態(數量、大小、分佈狀態等),藉由適當地控制延出纖維部113之形態,可提高纖維塊11之交絡性。
In the
纖維塊11係柔軟性等優異者。於本實施形態中,關於吸收性芯體40,如上所述,其中含有之複數個纖維塊11彼此藉由相互交絡而結合,進而,纖維塊11與吸水性纖維12F之間亦藉由相互交絡而結合,故而保形性、柔軟性、緩衝性、壓縮回覆性等優異,於裝入至衛生棉1之情形時,對於承受自各種方向之外力(例如,吸收性物品穿著者之體壓)靈活地變形,可服貼性良好地使衛生棉1與穿著者之身體密接。
The
圖4模式性地表示吸收性芯體40受到外力F被壓縮時之變形狀態。於纖維集合體即纖維塊11與非纖維集合體即吸水性纖維12F混合存在之吸收性芯體40中,起因於兩構件11、12F之剛性差,於兩構件11、12F之邊界BL(圖4中之虛線)尤其容易彎曲,邊界BL作為吸收性芯體40之變形時之彎曲部而發揮功能,此時,由於作為該彎曲部之邊界BL通常遍及吸收性芯體40之全域而存在,故而吸收性芯體40對各種外力響應性較好地靈活變形,又,於解除該外力之情形時,可藉由纖維塊11所具備之壓縮回覆性而快速地恢復至原本之狀態。此種吸收性芯體40之變形-回覆特
性不僅可於壓縮吸收性芯體40之情形時顯現,而且於扭曲之情形時亦可同樣地顯現。即,裝入至衛生棉1之吸收性芯體40於衛生棉1之穿著時以夾持於穿著者之兩大腿部間之狀態配置,故而其吸收體4存在因穿著者之步行動作時之兩大腿部之移動而繞於縱向X上延伸之假想之旋轉軸扭曲之情況,但由於吸收性芯體40具備較高之變形-回覆特性,故而即便於此種情形時,亦可針對促使來自兩大腿部之扭曲之外力而容易地變形、回覆,因此,不易褶皺,可對衛生棉1賦予對穿著者之身體之較高之服貼性。
FIG. 4 schematically shows the deformed state when the
如上所述,於吸收性芯體40中,纖維塊11彼此或纖維塊11與吸水性纖維12F交絡,此時,此處所言之纖維塊11彼此等之「交絡」包含下述形態A及B。
As described above, in the
形態A:纖維塊11彼此等藉由纖維塊11之構成纖維11F彼此之相互纏繞而結合,而非藉由熔合而結合之形態。
Form A: A form in which the fiber blocks 11 and the like are joined by the mutual entanglement of the
形態B:於吸收性芯體40之自然狀態(不施加外力之狀態)下,纖維塊11彼此等未結合,但於外力施加於吸收性芯體40之狀態下,纖維塊11彼此等可藉由構成纖維11F彼此之相互纏繞而結合之形態。此處所言之「外力施加於吸收性芯體40之狀態」係指例如於應用吸收性芯體40之吸收性物品之穿著中變形力施加於吸收性芯體40之狀態。
Form B: In the natural state of the absorbent core 40 (the state where no external force is applied), the fiber blocks 11 are not bonded to each other, but in the state where external force is applied to the
如此,於吸收性芯體40中,纖維塊11除了如形態A般藉由纖維彼此之相互纏繞即「交絡」而與其他纖維塊11或吸水性纖維12F結合以外,亦可如形態B般,以可與其他纖維塊11或吸水性纖維12F交絡之狀態存在,該利用纖維之交絡之結合對進一步有效地顯現上述吸收性芯體40之作用效果而言,為重要方面之一。但是,就保形性之方面而言,吸收性芯體40更佳為具有形態A之「交絡」。無論為形態A或B,利用吸收性芯體
40中之構成纖維之交絡之結合均不用接著成分而僅由纖維彼此之相互纏繞形成,故而與例如專利文獻2所記載般之利用「纖維之熔合」之結合相比,結合力本身更低,反過來說,交絡之各個要素(纖維塊11、吸水性纖維12F)之移動之自由度更高,因此,該各個要素可於能維持作為包含其等之集合體之一體性之範圍內移動。如此,吸收性芯體40藉由其中含有之複數個纖維塊11彼此或纖維塊11與吸水性纖維12F相對較鬆地結合,而具有受到外力時可變形之緩和之保形性,以高水準兼顧保形性與緩衝性及壓縮回覆性等。
In this way, in the
再者,吸收性芯體40中之經由纖維塊11之結合態樣無需均為「交絡」,吸收性芯體40之一部分亦可包含除交絡以外之其他結合態樣,例如,利用接著劑之接合等。
Furthermore, the combination of the
但是,例如,與衛生棉1中之凹陷部7等吸收性物品之其他構件成為一體之結果為,於自吸收性芯體40排除形成於吸收性芯體40之「經由纖維塊11之熔合」而得之剩餘之部分,即,於吸收性芯體40其本身中,較理想為,纖維塊11彼此之結合、或纖維塊11與吸水性纖維12F之結合僅由「纖維之交絡」形成。
However, for example, as a result of being integrated with other members of the absorbent article such as the
就更進一步確實顯現上述吸收性芯體40之作用效果之觀點而言,形態A即「藉由交絡結合之纖維塊11」與形態B即「可交絡之狀態之纖維塊11」之合計數量相對於吸收性芯體40中之纖維塊11之總數,較佳為半數以上,進而較佳為70%以上,更佳為80%以上。
From the viewpoint of more surely showing the effect of the above-mentioned
就同樣之觀點而言,具有形態A之「交絡」之纖維塊11之數量較佳為具有與其他纖維塊11或吸水性纖維12F之結合部之纖維塊11之總數之70%以上,尤佳為80%以上。
From the same point of view, the number of fiber blocks 11 having the "intersection" of form A is preferably more than 70% of the total number of fiber blocks 11 having joints with other fiber blocks 11 or water-
作為吸收性芯體40之主要特徵之一,可列舉纖維塊11之外形形狀。圖5表示2個纖維塊11之典型之外形形狀。圖5(a)所示之纖維塊11A呈四角柱形狀,更具體而言,呈長方體形狀,圖5(b)所示之纖維塊11B呈圓盤形狀。纖維塊11A、11B於具備相對向之2個基本面(base plane)111、及連結該2個基本面111之骨架面(bodyplane)112之方面有共通之處。基本面111及骨架面112均為在評價以此種纖維為主體之物品中之表面之凹凸程度時應用之等級下認為實質上無凹凸之部分。
As one of the main features of the
圖5(a)之長方體形狀之纖維塊11A具有6個平坦面,此時,該6個面之中具有最大面積之相對向之2個面分別為基本面111,剩餘之4個面分別為骨架面112。基本面111與骨架面112相互交叉,更具體而言,正交。
The rectangular parallelepiped-shaped
圖5(b)之圓盤形狀之纖維塊11B具有俯視圓形狀之相對向之2個平坦面、及連結兩平坦面之彎曲之周面,此時,該2個平坦面分別為基本面111,該周面為骨架面112。
The disc-shaped
纖維塊11A、11B在骨架面112於俯視下呈四邊形形狀,更具體而言,呈長方形形狀之方面亦有共通之處。
The fiber blocks 11A and 11B have a quadrangular shape in a plan view on the
吸收性芯體40中含有之複數個纖維塊11在分別為如圖5所示之纖維塊11A、11B般之具備2個對向之基本面111及連結兩基本面111之骨架面112之「定形之纖維集合體」之方面,與作為不定形之纖維集合體之專利文獻2及3中記載之不織布片或微細纖維網不同。換言之,於透視吸收性芯體40中之任意1個纖維塊11之情形時(例如,於利用電子顯微鏡觀察之情形時),該纖維塊11之透視形狀根據其觀察角度而不同,每1個纖維塊11存在多個透視形狀,此時,吸收性芯體40中之複數個纖維塊11各者具
有具備2個對向之基本面111及連結兩基本面111之骨架面112之特定透視形狀作為其多個透視形狀之一。專利文獻2及3中記載之吸收體中含有之複數個不織布片或微細纖維網實質上不具有如基本面111或骨架面112般之「面」即有擴展之部分,外形形狀相互不同,並非「定形」。
The plurality of fiber blocks 11 contained in the
如此,若吸收性芯體40中包含之複數個纖維塊11為由基本面111及骨架面112劃分形成之「定形之纖維集合體」,則與其為如專利文獻2及3所記載般之不定形之纖維集合體之情況相比,吸收性芯體40中之纖維塊11之均勻分散性提高,故而藉由將如纖維塊11般之纖維集合體調配於吸收性芯體40而穩定地顯現期待之效果(吸收體之柔軟性、緩衝性、壓縮回覆性等之提高效果)。又,尤其於如圖5(a)所示之長方體形狀之纖維塊11之情形時,其外表面包含2個基本面111及4個骨架面112之6個面,故而與如圖5(b)所示之具有3個外表面之圓盤形狀之纖維塊11相比,可相對更多地具有與其他纖維塊11或吸水性纖維12F之接觸機會,交絡性提高,亦可提高保形性等。
In this way, if the plurality of fiber blocks 11 included in the
於纖維塊11中,2個基本面111之總面積大於骨架面112之總面積。即,於圖5(a)之長方體形狀之纖維塊11A中,2個基本面111各者之面積之總和大於4個骨架面112各者之面積之總和,又,於圖5(b)之圓盤形狀之纖維塊11B中,2個基本面111各者之面積之總和大於形成圓盤形狀之纖維塊11B之周面之骨架面112之面積。於纖維塊11A、11B任一者中,基本面111均為纖維塊11A、11B所具有之複數個面之中面積最大之面。
In the
此種由2個基本面111及與兩基本面111交叉之骨架面112劃分形成之「定形之纖維集合體」即纖維塊11藉由使製造方法與先前技術不同而實現。如圖6所示,較佳之纖維塊11之製造方法係使用切割器等切斷
器件將成為原料之原料纖維片材10bs(與纖維塊11為相同組成且尺寸大於纖維塊11之片材)切斷為定形。以此方式製造之複數個纖維塊11與利用如專利文獻2及3般之先前技術製造者相比,形狀及尺寸更定形地一致。圖6係說明圖5(a)之長方體形狀之纖維塊11A之製造方法之圖,圖6中之虛線表示切斷線。於吸收性芯體40中調配有以此方式將纖維片材切斷為定形而獲得之形狀及尺寸均勻之複數個纖維塊11。如上所述,作為原料纖維片材10bs,較佳為不織布。
The
如圖6所示,圖5(a)之長方體形狀之纖維塊11A係藉由將原料纖維片材10bs於第1方向D1及與該第1方向D1交叉(更具體而言,為正交)之第2方向D2以特定之長度切斷而製造。兩方向D1、D2分別為片材10bs之面方向上之特定之一方向,片材10bs沿著與該面方向正交之厚度方向Z切斷。如此,於將原料纖維片材10bs切斷為所謂丁狀而獲得之複數個長方體形狀之纖維塊11A中,通常,其切斷面即片材10bs之切斷時與切割器等切斷器件接觸之面為骨架面112,非切斷面即不與該切斷器件接觸之面為基本面111。基本面111係片材10bs中之正面及背面(與厚度方向Z正交之面),又,如上所述,係纖維塊11A所具有之複數個面之中面積最大之面。
As shown in FIG. 6, the rectangular
再者,以上之關於纖維塊11A之說明亦基本上適用於圖5(b)之圓盤形狀之纖維塊11B。其與纖維塊11A之實質之不同僅為原料纖維片材10bs之切斷圖案,將片材10bs切斷為定形而獲得纖維塊11B時,只要與纖維塊11B之俯視形狀相應地將片材10bs切斷為圓形狀即可。
Furthermore, the above description of the
又,纖維塊11之外形形狀並不限定於圖5所示者,基本面111及骨架面112均可如圖5(a)之各面111、112般為不彎曲之平坦面,或者
亦可如圖5(b)之骨架面112(圓盤形狀之纖維塊11B之周面)般為彎曲面。又,基本面111與骨架面112可為相互相同形狀相同尺寸,具體而言,例如,纖維塊11A之外形形狀可為立方體形狀。
In addition, the outer shape of the
如上所述,纖維塊11(11A、11B)所具有之2種面(基本面111、骨架面112)分類為:切斷面(骨架面112),其於製造纖維塊11時由利用切割器等切斷器件之原料纖維片材10bs之切斷形成;及非切斷面(基本面111),其係片材10bs本來具有之面且不與該切斷器件接觸。並且,起因於是否為該切斷面之不同,切斷面即骨架面112具有與非切斷面即基本面111相比,纖維端部之每單位面積之數量更多之特徵。此處所言之「纖維端部」意指纖維塊11之構成纖維11F之長度方向端部。通常,纖維端部亦存在於非切斷面即基本面111,但骨架面112為由原料纖維片材10bs之切斷形成之切斷面,因此,包含由該切斷形成之構成纖維11F之切斷端部之纖維端部於骨架面112之整體存在多個,即,纖維端部之每單位面積之數量多於基本面111之每單位面積之數量。
As described above, the two types of surfaces (
存在於纖維塊11之各面(基本面111、骨架面112)之纖維端部對該纖維塊11與吸收性芯體40中包含之其他纖維塊11或吸水性纖維12F之間形成交絡有用。又,一般地,纖維端部之每單位面積之數量越多,越能提高交絡性,故而可提高吸收性芯體40之保形性等各特性。並且,如上所述,纖維塊11之各面中之纖維端部之每單位面積之數量並非均勻,關於該纖維端部之每單位面積之數量,「骨架面112>基本面111」之大小關係成立,故而經由纖維塊11之與其他纖維(其他纖維塊11、吸水性纖維12F)之交絡性根據該纖維塊11之面而不同,骨架面112與基本面111相比,交絡性更高。即,利用經由骨架面112之與其他纖維之交絡之結合與經由基
本面111之結合相比結合力更強,於1個纖維塊11中,可利用基本面111及骨架面112使其與其他纖維之結合力產生差。一般地,該結合力越強,越限制其結合之纖維之移動之自由度,作為吸收性芯體40整體,強度(保形性)提高,反過來說,有柔軟度降低之傾向。
The fiber ends existing on each surface of the fiber block 11 (the
如此,於吸收性芯體40中,包含於其中之複數個纖維塊11各者對其周邊之其他纖維(其他纖維塊11、吸水性纖維12F)具有2種結合力而交絡,藉此,吸收性芯體40兼具適度之柔軟度與強度(保形性)。並且,於根據慣例將具有此種優異之特性之吸收性芯體40用作吸收性物品之吸收體之情形時,可對該吸收性物品之穿著者提供舒適之穿著感,並且有效地防止因穿著時之穿著者之體壓等外力而破壞吸收性芯體40之不良狀況。
In this way, in the
尤其是,如上所述,圖5所示之纖維塊11(11A、11B)之2個基本面111之總面積大於骨架面112之總面積。因此,意味著,纖維端部之每單位面積之數量相對較少,因而與其他纖維之交絡性相對較低之基本面111與具有與其相反之性質之骨架面112相比,總面積更大。因此,圖5所示之纖維塊11(11A、11B)與纖維端部均勻地存在於表面整體之纖維塊相比,更易於抑制與周邊之其他纖維(其他纖維塊11、吸水性纖維12F)之交絡,又,即便與周邊之其他纖維交絡,亦易於以相對較弱之結合力交絡,因此,不易成為較大之團塊,可對吸收性芯體40賦予優異之柔軟性。
In particular, as described above, the total area of the two
相對於此,如上所述,專利文獻2及3中記載之不織布片或微細纖維網係利用如銑刀般之切斷機將原料纖維片材切斷為不定形等而製造,故而不會成為具有如基本面111或骨架面112般之「面」之定形之薄片狀之纖維塊,並且,於其製造時切斷處理之外力施加於纖維塊整體,故而構成纖維之纖維端部會隨機地形成於纖維塊整體,難以充分顯現由該纖維
端部產生之上述作用效果。
On the other hand, as described above, the non-woven fabric sheet or the fine fiber web described in
就更確實地取得上述由纖維端部所產生之作用效果之觀點而言,基本面111(非切斷面)之纖維端部之每單位面積之數量N1與骨架面112(切斷面)之纖維端部之每單位面積之數量N2之比率在N1<N2之前提下,作為N1/N2,較佳為0以上,進而較佳為0.05以上,並且,較佳為0.90以下,進而較佳為0.60以下。更具體而言,N1/N2較佳為0以上且0.90以下,進而較佳為0.05以上且0.60以下。 From the viewpoint of obtaining the above-mentioned effects produced by the fiber end more reliably, the number per unit area of the fiber end of the basic plane 111 (non-cut surface) is N 1 and the skeleton surface 112 (cut surface) The ratio of the number of fiber ends per unit area N 2 is set before N 1 <N 2. As N 1 /N 2 , it is preferably 0 or more, more preferably 0.05 or more, and preferably 0.90 Hereinafter, it is more preferably 0.60 or less. More specifically, N 1 /N 2 is preferably 0 or more and 0.90 or less, and more preferably 0.05 or more and 0.60 or less.
基本面111之纖維端部之每單位面積之數量N1較佳為0個/mm2以上,進而較佳為3個/mm2以上,並且,較佳為8個/mm2以下,進而較佳為6個/mm2以下。
The number N 1 per unit area of the fiber ends of the
骨架面112之纖維端部之每單位面積之數量N2較佳為5個/mm2以上,進而較佳為8個/mm2以上,並且,較佳為50個/mm2以下,進而較佳為40個/mm2以下。
The number N 2 per unit area of the fiber ends of the
基本面111、骨架面112之纖維端部之每單位面積之數量藉由以下之方法測定。
The number per unit area of the fiber ends of the
針對包含測定對象之纖維之構件(纖維塊),使用雙面紙膠帶(米其邦股份有限公司製造之NICETACK NW-15),將測定片貼附於試樣台。繼而,對測定片塗佈鉑。塗佈係使用日立那珂精器股份有限公司製造之離子濺鍍裝置E-1030型(商品名),濺鍍時間設為120秒。針對測定片之各面(基本面及骨架面),使用JEOL(股)製造之JCM-6000型之電子顯微鏡,以倍率100倍觀察。於該倍率100倍之觀察畫面中,於測定對象面(基本面或骨架 面)之任意之位置設定縱1.2mm、橫0.6mm之長方形區域,且以該長方形區域之面積占該觀察畫面之面積之90%以上之方式調整觀察角度等之後,測定該長方形區域內包含之纖維端部之個數。其中,於倍率100倍之觀察畫面中,纖維塊之測定對象面小於1.2mm×0.6mm且上述長方形區域之面積占該觀察畫面整體之比率未達90%之情形時,使觀察倍率大於100倍之後,與上述同樣地測定該測定對象面中之上述長方形區域內包含之纖維端部之數量。此處,成為個數測定之對象之「纖維端部」係纖維塊之構成纖維之長度方向端部,即便該構成纖維之除長度方向端部以外之部分(長度方向中間部)自測定對象面延出,該長度方向中間部亦不設為個數測定之對象。然後,藉由下述式算出纖維塊之測定對象面(基本面或骨架面)中之纖維端部之每單位面積之數量。針對10個纖維塊各者,依據上述順序,測定基本面及骨架面各者中之纖維端部之每單位面積之數量,將該等複數個測定值之平均值設為該測定對象面中之纖維端部之每單位面積之數量。 For the member (fiber block) containing the fiber to be measured, a double-sided paper tape (NICETACK NW-15 manufactured by Miqibang Co., Ltd.) was used to attach the measurement piece to the sample stand. Then, platinum was applied to the measurement piece. The coating system used an ion sputtering device E-1030 (trade name) manufactured by Hitachi Naka Seiki Co., Ltd., and the sputtering time was set to 120 seconds. For each side of the test piece (fundamental plane and skeleton plane), use the JCM-6000 electron microscope manufactured by JEOL (stock) to observe at a magnification of 100 times. In the observation screen with the magnification of 100 times, in the measurement target surface (the fundamental surface or the skeleton Set a rectangular area of 1.2mm in length and 0.6mm in width at any position of the surface), and after adjusting the observation angle so that the area of the rectangular area occupies more than 90% of the area of the observation screen, measure the rectangular area contained The number of fiber ends. Among them, in the observation screen with a magnification of 100 times, when the measurement target surface of the fiber block is less than 1.2mm×0.6mm and the area of the above-mentioned rectangular area accounts for less than 90% of the entire observation screen, the observation magnification is greater than 100 times After that, the number of fiber ends included in the rectangular region in the measurement target surface was measured in the same manner as described above. Here, the "fiber end" that is the object of the number measurement is the end of the fiber in the length direction of the constituent fiber of the fiber block, even if the part of the constituent fiber other than the end in the length direction (the middle in the length direction) is from the measurement target surface Extend, the middle part in the longitudinal direction is not set as the target of the number measurement. Then, the number of fiber ends per unit area in the measurement target surface (fundamental surface or skeleton surface) of the fiber block is calculated by the following formula. For each of the 10 fiber blocks, measure the number of fiber ends per unit area in each of the basic plane and the skeleton plane according to the above sequence, and set the average of these plural measured values as the measurement target plane The number of fiber ends per unit area.
纖維塊之測定對象面(基本面或骨架面)中之纖維端部之每單位面積之數量(個數/mm2)=長方形區域(1.2×0.6mm)中包含之纖維端部之個數/該長方形區域之面積(0.72mm2) The number of fiber ends per unit area (number/mm 2 ) = number of fiber ends contained in the rectangular area (1.2×0.6mm)/ The area of the rectangular area (0.72mm 2 )
於纖維塊11之基本面111如圖5(a)所示之纖維塊11A般於俯視下呈長方形形狀之情形時,就吸收體4中之纖維塊11之均勻分散性之提高之觀點而言,該長方形形狀之短邊111a較佳為與含有該纖維塊11(11A)之吸收性芯體40之厚度同等或與其相比更短。短邊111a之長度與吸收性芯體40之厚度之比率以前者/後者計較佳為0.03以上,進而較佳為0.08以上,並且,較佳為1以下,進而較佳為0.5以下。
When the
吸收性芯體40之厚度較佳為1mm以上,進而較佳為2mm以上,並
且,較佳為15mm以下,進而較佳為10mm以下。吸收性芯體40之厚度利用以下之方法測定。
The thickness of the
將測定對象物(吸收性芯體40)以不發生皺褶或彎折之方式靜置於水平之位置,並測定5cN/cm2之負載下之測定對象物之厚度。具體而言,厚度之測定例如使用厚度計PEACOCK DIAL UPRIGHT GAUGES R5-C(OZAKI MFG.CO.LTD.製造)。 The object to be measured (absorbent core 40) is placed in a horizontal position without wrinkles or bending, and the thickness of the object to be measured under a load of 5 cN/cm 2 is measured. Specifically, for the measurement of thickness, for example, a thickness meter PEACOCK DIAL UPRIGHT GAUGES R5-C (manufactured by OZAKI MFG. CO. LTD.) is used.
此時,於厚度計之前端部與剪切之測定對象物之間配置以對測定對象物之負載成為5cN/cm2之方式調整了大小之俯視圓形狀或正方形狀之平板(厚度5mm左右之丙烯酸系樹脂板),並測定厚度。厚度測定係測定10處,算出其等之平均值並將其作為測定對象物之厚度。 At this time, between the front end of the thickness gauge and the measured object to be cut, a circular or square flat plate (with a thickness of about 5 mm) adjusted in size so that the load on the measured object becomes 5 cN/cm 2 is arranged. Acrylic resin board), and measure the thickness. The thickness measurement is to measure 10 places, calculate the average value of them, and use it as the thickness of the object to be measured.
纖維塊11(11A、11B)之各部之尺寸等較佳為如下所示般設定。纖維塊11之各部之尺寸可基於下述纖維塊11之外形形狀之特定作業時之電子顯微鏡照片等進行測定。
It is preferable to set the size etc. of each part of the fiber block 11 (11A, 11B) as shown below. The size of each part of the
於基本面111為如圖5(a)所示之俯視長方形形狀之情形時,其短邊111a之長度L1較佳為0.3mm以上,進而較佳為0.5mm以上,並且,較佳為10mm以下,進而較佳為6mm以下。俯視長方形形狀之基本面111之長邊111b之長度L2較佳為0.3mm以上,進而較佳為2mm以上,並且,較佳為30mm以下,進而較佳為15mm以下。
When the
再者,如圖5所示,於基本面111為纖維塊11所具有之複數個面之中具有最大面積之面之情形時,長邊111b之長度L2與纖維塊11之最大兩端間距長度一致,該最大兩端間距長度與圓盤形狀之纖維塊11B中之俯視圓
形狀之基本面111之直徑一致。
Furthermore, as shown in FIG. 5, when the
短邊111a之長度L1與長邊111b之長度L2之比率以L1/L2計較佳為0.003以上,進而較佳為0.025以上,並且,較佳為1以下,進而較佳為0.5以下。再者,於本發明中,基本面111之俯視形狀並不限定於如圖5(a)所示之長方形形狀,亦可為正方形形狀,即,相互正交之2邊之長度L1、L2之比率以L1/L2計亦可為1。
The ratio of the length L1 of the
纖維塊11之厚度T,即,2個對向之基本面111間之長度T較佳為0.1mm以上,進而較佳為0.3mm以上,並且,較佳為10mm以下,進而較佳為6mm以下。
The thickness T of the
又,吸收性芯體40較佳為具有力學各向同性,以便於該吸收性芯體40之所有面易於取得起因於纖維塊11之存在之作用效果。因此,較佳為纖維塊11高密度且均勻地分佈於吸收性芯體40之整體。就該觀點而言,較佳為,於吸收性芯體40之相互正交之2個方向之投影觀察下,複數個纖維塊11之重疊部存在於任意之10mm見方之單位區域中。圖3及圖4中之符號11Z表示複數個纖維塊11之重疊部。作為此處所言之「相互正交之2個方向之投影觀察」,典型而言,可列舉:吸收性芯體(吸收體)之厚度方向之投影觀察(即,針對吸收性芯體,自其肌膚對向面或非肌膚對向面觀察之情形)、及與該厚度方向正交之方向之投影觀察(即,針對吸收性芯體,自其側面觀察之情形)。
In addition, the
圖7(a)表示本發明之纖維塊之一實例之電子顯微鏡照片,圖7(b)表示依照該電子顯微鏡照片模式性地表示纖維塊11之圖。如圖7所示,吸收性芯體40中包含之複數個纖維塊11中可包含具有本體部110、及包含自該本體部110向外側延出之纖維11F而構成且與該本體部110相比纖
維密度更低(每單位面積之纖維之數量更少)之延出纖維部113者。再者,吸收性芯體40中亦可包含不具有延出纖維部113之纖維塊11,即僅包含本體部110之纖維塊11。延出纖維部113係上述存在於纖維塊11之各面(基本面111、骨架面112)之纖維端部之一種,係該纖維端部之中自纖維塊11之各面向外側延出之纖維端部。
Fig. 7(a) shows an electron micrograph of an example of the fiber block of the present invention, and Fig. 7(b) shows a diagram schematically showing the
本體部110係由上述2個對向之基本面111、及連結兩基本面111之骨架面112劃分形成之部分。本體部110係構成纖維塊11之主體且形成纖維塊11之定形之外形形狀之部分,纖維塊11所具有之較高之柔軟性、緩衝性、壓縮回覆性等各特性基本上很大程度上取決於本體部110。另一方面,延出纖維部113主要有助於吸收性芯體40中含有之複數個纖維塊11彼此或纖維塊11與吸水性纖維12F之交絡性之提高,與吸收性芯體40之保形性之提高直接相關,除此以外,亦影響纖維塊11之吸收性芯體40中之均勻分散性等,可間接地補強由本體部110產生之作用效果。
The
本體部110與延出纖維部113相比,纖維密度更高,即,每單位面積之纖維之數量更多。又,通常,本體部110本身之纖維密度均勻。本體部110占纖維塊11之總質量之比率通常為至少40質量%以上,較佳為50質量%以上,進而較佳為60質量%以上,尤佳為85質量%以上。本體部110與延出纖維部113可藉由下述外形形狀之特定作業而區分。
The
特定出吸收性芯體40中包含之纖維塊11之本體部110之外形形狀之作業可藉由著眼於吸收性芯體40中之纖維密度之高低差(每單位面積之纖維數之多少)或纖維之種類、纖維直徑之不同等,並確認本體部110與除此以外之部分之「邊界」而進行。本體部110與存在於其周圍之延出纖維部113相比,纖維密度更高,又,通常,作為本體部110之構成
纖維之合成纖維與吸水性纖維12F(典型而言,為纖維素系纖維)存在質量及/或尺寸之不同,故而即便為多個纖維塊11及吸水性纖維12F混合存在之吸收性芯體40,亦可藉由著眼於上述方面而容易地確認上述邊界。以此方式確認之邊界係基本面111或骨架面112之周緣(邊),藉由該邊界確認作業而特定出基本面111及骨架面112,進而特定出本體部110。該邊界確認作業可藉由使用電子顯微鏡,視需要以複數個觀察角度觀察對象物(吸收性芯體40)而實施。尤其於吸收性芯體40中包含之纖維塊11為如圖5所示之纖維塊11A、11B般之「2個基本面111之總面積大於骨架面112之總面積」者之情況下,尤其於基本面111成為該纖維塊11之具有最大面積之面之情形時,可相對較容易地特定出該較大面積之基本面111,故而可順利地進行本體部110之外形形狀之特定作業。
The operation of specifying the outer shape of the
如圖7(b)所示,延出纖維部113包含自形成本體部110之外表面之基本面111及骨架面112之中之至少1個面向外側延出之本體部110之構成纖維11F。圖7(b)係自基本面111(纖維塊11之複數個面之中具有最大面積之面)側俯視纖維塊11之圖,纖維11F自與該基本面111交叉之骨架面112延出多個而形成延出纖維部113。
As shown in FIG. 7(b), the
延出纖維部113之形態並無特別限制。延出纖維部113既存在包含1條纖維11F之情況,又存在如下述延出纖維束部113S般包含複數條纖維11F之情況。又,延出纖維部113包含自本體部110延出之纖維11F之長度方向端部,但存在除了此種纖維端部以外亦可包含纖維11F之除長度方向兩端部以外之部分(長度方向中間部)之情況。即,於纖維塊11中,存在構成纖維11F之長度方向之兩端部存在於本體部110且除此以外之部分即長度方向中間部自本體部110向外側以環狀延出(突出)之情況,此
時,此情形時之延出纖維部113包含該纖維11F之環狀之突出部而構成。
The shape of the
如上所述,延出纖維部113之主要作用之一係使吸收性芯體40中含有之複數個纖維塊11彼此、或纖維塊11與吸水性纖維12F相互交絡。一般地,若延出纖維部113自本體部110之延出長度變長,或延出纖維部113之粗細度變粗,或1個纖維塊11所具有之延出纖維部113之數量變多,則經由該延出纖維部113而交絡之物體彼此之連結變強而不易解除交絡,故而更進一步穩定地取得本發明之特定之效果。
As described above, one of the main functions of the
於纖維塊11係如圖6所示般將原料纖維片材10bs切斷為定形而獲得者之情形時,延出纖維部113相對較多地存在於其切斷面即骨架面112,相對於此,完全不存在於非切斷面即基本面111,或者即便存在,其數量亦少於骨架面112。如此,延出纖維部113偏集存在於作為切斷面之骨架面112之理由在於,延出纖維部113之多數係由原料纖維片材之切斷而產生之「細毛」。即,由原料纖維片材10bs之切斷形成之骨架面112於其切斷時藉由切割器等切斷器件而被整體地摩擦,故而易於形成包含片材10bs之構成纖維11F之細毛,易發生所謂的起毛。雖然亦根據原料纖維片材之種類而不同,但若縮短切斷線之間隔、或放慢切斷速度等,則易於形成延出纖維部113,其長度亦可調整。另一方面,非切斷面即基本面111並未發生此種與切斷器件之摩擦,故而不易形成細毛即延出纖維部113。
When the
原料纖維片材10bs切斷時之切斷線之間隔L1a(第1方向之間隔,參照圖6)及間隔L2a(第2方向之間隔,參照圖6)就上述延出纖維部113之形成促進等觀點、及確保在纖維塊11顯現特定之效果之方面所必要之尺寸之觀點等而言,較佳為0.3mm以上,進而較佳為0.5mm以上,並且,較佳為30mm以下,進而較佳為15mm以下。
The interval L1a (the interval in the first direction, refer to FIG. 6) and the interval L2a (the interval in the second direction, refer to FIG. 6) of the cutting line when the raw fiber sheet 10bs is cut promotes the formation of the above-mentioned
如圖7(b)所示,纖維塊11具有包含自本體部110、更具體而言自骨架面112向外側延伸之複數條纖維11F之延出纖維束部113S作為延出纖維部113之一種。纖維塊11所具有之延出纖維部113中之至少1個可為該延出纖維束部113S。延出纖維束部113S係自骨架面112延出之複數條纖維11F聚集而構成者,在與延出纖維部113相比自骨架面112之延出長度更長之方面被賦予了特徵。延出纖維束部113S亦可存在於基本面111,但典型而言,如圖7(b)所示,存在於骨架面112,完全不存在於基本面111,或者即便存在,其數量亦少於骨架面112。其理由與延出纖維部113主要存在於切斷面即骨架面112之理由相同,如上所述。
As shown in FIG. 7(b), the
纖維塊11具有此種亦可稱為長且粗之大型之延出纖維部113之延出纖維束部113S,藉此,纖維塊11彼此或纖維塊11與吸水性纖維12F之交絡更進一步增強,其結果為,更進一步穩定地取得起因於纖維塊11之存在的本發明之特定之效果。延出纖維束部113S易於藉由實施上述易於起毛之條件下之原料纖維片材10bs之切斷(參照圖6)而形成。
The
延出纖維束部113S自本體部110之延出長度即自骨架面112(切斷面)之延出長度較佳為0.05mm以上,進而較佳為0.15mm以上,並且,較佳為7mm以下,進而較佳為4mm以下。延出纖維束部113S之延出長度可於上述纖維塊11之外形形狀之特定作業(邊界確認作業)中測定。具體而言,例如,利用基恩士製造之顯微鏡(50倍率),將3M(股)製造之雙面膠帶貼在丙烯酸製之透明之樣本台之表面,於其上載置纖維塊11並進行固定,然後,根據上述外形形狀之特定作業,特定出該纖維塊11之外形形狀之後,測定自該外形形狀延出之纖維11F中之延出部分之長度,並將該測得之延出部分之長度設為延出纖維束部113S之延出長度。
The extension length of the extended
延出纖維束部113S較佳為其複數個構成纖維11F相互熱熔。該延出纖維束部113S之熱熔部通常與該延出纖維束部113S之其他部分(非熱熔部)相比,該延出纖維束部113S之與長度方向正交之方向之兩端間距長度(於該熱熔部之剖面為圓形之情形時,為直徑)更長。藉由使延出纖維束部113S具有此種亦可稱為大徑部之熱熔部,延出纖維束部113S本身之強度提高,藉此,經由延出纖維束部113S而交絡之纖維塊11彼此或纖維塊11與吸水性纖維12F之交絡更進一步增強。又,若延出纖維束部113S具有熱熔部,則具有如下優點:不僅於該延出纖維束部113S處於乾燥狀態之情形時,而且於吸收水分而成為濕潤狀態之情形時,該延出纖維束部113S本身之強度、保形性等亦得以提高。並且,藉由該優點,於將吸收性芯體40應用於吸收性物品之情形時,吸收性芯體40為乾燥狀態之情況自不待言,即便於吸收穿著者所排泄之尿或經血等體液而成為濕潤狀態之情形時,亦可穩定地取得上述起因於纖維塊11之存在之作用效果。此種具有熱熔部之延出纖維束部113S可藉由在如圖6所示之纖維塊11之製造步驟即纖維塊11之原料纖維片材10bs之切斷步驟中,使用「具有構成纖維彼此之熱熔部之纖維片材」作為原料纖維片材10bs而製造。
The extended
纖維塊11之構成纖維11F包含吸水性低於吸水性纖維12F之「弱吸水性」之纖維。用作纖維11F之弱吸水性之纖維較佳為弱吸水性之合成纖維。藉由纖維塊11之構成纖維11F為弱吸水性之纖維,不僅於吸收性芯體40為乾燥狀態之情形時,而且於吸收水分(尿或經血等體液)而處於濕潤狀態之情形時,亦穩定地取得上述起因於纖維塊11之存在之作用效果(保形性、柔軟性、緩衝性、壓縮回覆性、不易褶皺性等之提高效果)。纖維塊11中之作為構成纖維11F之弱吸水性之纖維之含量相對於纖維塊11之
總質量,較佳為90質量%以上,最佳為100質量%,即纖維塊11僅由弱吸水性之纖維形成。尤其於作為構成纖維11F之弱吸水性之纖維為非吸水性之纖維之情形時,進一步穩定地取得上述起因於纖維塊11之存在之作用效果。
The
於本說明書中,「吸水性」之用語係例如如認為紙漿有吸水性般,對業者而言可容易理解者。同樣地,熱塑性纖維亦可容易地理解為與紙漿相比為弱吸水性之纖維,並且為非吸水性纖維。另一方面,纖維之吸水性之程度可根據由下述方法測得之水分率之值而比較相對之吸水性之不同(吸水性纖維與吸水性弱於其之纖維之不同),並且亦可界定更佳之範圍。該水分率之值越大,纖維之吸水性越強。作為本發明之吸水性纖維,該水分率較佳為6%以上,進而較佳為10%以上。另一方面,本發明之弱吸水性之纖維之該水分率較佳為未達6%,進而較佳為未達4%。再者,於水分率未達6%之情形時,該纖維可判定為非吸水性纖維。即,作為本發明之弱吸水性之纖維,較佳為非吸水性纖維。 In this specification, the term "water-absorbency" refers to, for example, that pulp is considered to be water-absorbent, and it can be easily understood by the industry. Similarly, thermoplastic fibers can also be easily understood as fibers that are weakly water-absorbent compared to pulp, and are non-water-absorbent fibers. On the other hand, the degree of water absorption of the fiber can be compared with the relative water absorption according to the value of the moisture content measured by the following method (the difference between water-absorbent fiber and fiber with weaker water absorption), and also Define a better range. The greater the value of the moisture content, the stronger the water absorption of the fiber. As the water-absorbent fiber of the present invention, the moisture content is preferably 6% or more, and more preferably 10% or more. On the other hand, the moisture content of the weakly absorbent fiber of the present invention is preferably less than 6%, and more preferably less than 4%. Furthermore, when the moisture content is less than 6%, the fiber can be judged as a non-absorbent fiber. That is, as the weakly water-absorbent fiber of the present invention, a non-water-absorbent fiber is preferable.
水分率係採用JIS P8203之水分率試驗方法而算出。即,將纖維試樣靜置於溫度40℃、相對濕度80%RH之試驗室24小時之後,於該室內測定絕對乾燥處理前之纖維試樣之重量W(g)。其後,於溫度105±2℃之電乾燥機(例如,ISUZU製作所股份有限公司製造)內靜置1小時,進行纖維試樣之絕對乾燥處理。絕對乾燥處理後,於溫度20±2℃、相對濕度65±2%之標準狀態之試驗室中,在利用旭化成(股)製造之Saran Wrap(註冊商標)包覆纖維試樣之狀態下,將矽膠(例如,豐田化工(股))放入玻璃乾燥器內(例 如,(股)Tech jam製造),將其靜置直至纖維試樣之溫度變為20±2℃為止。其後,稱量纖維試樣之恆量W'(g),由下式求出纖維試樣之水分率。 The moisture content is calculated using the moisture content test method of JIS P8203. That is, after the fiber sample is left in a test chamber at a temperature of 40° C. and a relative humidity of 80% RH for 24 hours, the weight W (g) of the fiber sample before the absolute drying treatment is measured in the chamber. After that, it is allowed to stand in an electric dryer (for example, manufactured by ISUZU Manufacturing Co., Ltd.) at a temperature of 105±2° C. for 1 hour to perform absolute drying treatment of the fiber sample. After absolute drying treatment, in a standard laboratory with a temperature of 20±2°C and a relative humidity of 65±2%, the fiber sample is covered with Saran Wrap (registered trademark) manufactured by Asahi Kasei Co., Ltd. Silicone (for example, Toyota Chemical Co., Ltd.) is put into the glass desiccator (example For example, (manufactured by Tech jam), let it stand until the temperature of the fiber sample becomes 20±2°C. After that, the constant weight W'(g) of the fiber sample is weighed, and the moisture content of the fiber sample is obtained from the following formula.
水分率(%)=(W-W'/W')×100 Moisture rate (%)=(W-W'/W')×100
又,同樣地,就吸收性芯體40在乾燥狀態及濕潤狀態之任一狀態下均可於保形性、柔軟性、緩衝性、壓縮回覆性、不易褶皺性等方面顯現優異之效果之觀點而言,纖維塊11較佳為具有複數個熱塑性纖維相互熱熔而成之三維構造。
Also, similarly, from the viewpoint that the
又,為了獲得此種複數個熱熔部三維地分散而成之纖維塊11,用作纖維塊11之構成纖維11F之作為非吸水性纖維之合成纖維較佳為熱塑性纖維。又,如上所述,延出纖維束部113S較佳為具有熱熔部,此時,藉由纖維塊11之構成纖維11F為熱塑性纖維,亦可獲得該延出纖維束部113S之較佳之形態。
In addition, in order to obtain such a
為了獲得複數個熱熔部三維地分散而成之纖維塊11,只要其原料纖維片材10bs(參照圖6)同樣地構成即可,又,如上所述,此種複數個熱熔部三維地分散而成之原料纖維片材10bs可藉由對以熱塑性纖維為主體之纖維網或不織布實施熱風處理等熱處理而製造。
In order to obtain a
作為較佳地作為纖維塊11之構成纖維11F之原材料之非吸水性之合成樹脂即熱塑性樹脂,例如,可列舉:聚乙烯、聚丙烯等聚烯烴;聚對苯二甲酸乙二酯等聚酯;尼龍6、尼龍66等聚醯胺;聚丙烯酸、聚甲基丙烯酸烷基酯、聚氯乙烯、聚偏二氯乙烯等,可單獨使用其等之1種或組合2種以上而使用。再者,纖維11F可為包括1種熱塑性樹脂或將包含熱塑性樹脂之2種以上之合成樹脂混合而成之摻合聚合物的單一纖維,或者亦可為複合纖維。此處所言之複合纖維係指利用紡絲頭將成分不同之
2種以上之合成樹脂複合並同時進行紡絲而獲得之合成纖維(熱塑性纖維),且複數個成分以分別於纖維之長度方向上連續之構造於單纖維內相互接著而成者。複合纖維之形態有芯鞘型、並列型等,並無特別限制。
As a non-water-absorbent synthetic resin that is preferably used as a raw material of the
又,關於纖維塊11,就進一步提高初始排泄中之體液之引入性之觀點而言,由下述方法測得之與水之接觸角較佳為未達90度,尤其70度以下。作為此種纖維,藉由根據慣例利用親水化劑對上述弱吸水性之纖維、較佳為非吸水性纖維進行處理而獲得。作為親水化劑,可使用通常之界面活性劑。
In addition, with regard to the
自測定對象(吸收性芯體、纖維塊)取出纖維,測定水相對於該纖維之接觸角。作為測定裝置,使用協和界面科學股份有限公司製造之自動接觸角計MCA-J。接觸角之測定係使用去離子水。將自噴墨方式水滴噴出部(Cluster Technology公司製造,噴出部孔徑為25μm之脈衝噴射器CTC-25)噴出之液量設定為20微微升,將水滴滴加至纖維之正上方。將滴加之情況錄影至連接於水平設置之相機之高速錄影裝置。就之後進行圖像解析之觀點而言,錄影裝置較理想為裝入有高速擷取裝置之個人電腦。於本測定中,每隔17msec對圖像進行錄影。於所錄影之影像中,藉由附帶軟體FAMAS(軟體之版本設為2.6.2,解析手法設為液滴法,解析方法設為θ/2法,圖像處理演算法設為無反射,圖像處理影像模式設為圖框,臨限位準設為200,不進行曲率修正)對水滴滴落至纖維之最初之圖像進行圖像解析,算出水滴與空氣接觸之面和纖維所成之角,並將其設為接觸角。自測定對象取出之纖維被裁斷為纖維長1mm,將該纖維載置於接觸角計之樣 本台,並維持為水平。針對每1條纖維測定不同之2個部位之接觸角。測量N=5條之接觸角至小數點後1位,將合計10個部位之測定值之平均值(於小數點後第2位四捨五入)定義為該纖維與水之接觸角。測定環境係設為室溫22±2℃、濕度65±2%RH。 The fiber was taken out from the measurement object (absorbent core, fiber block), and the contact angle of water with respect to the fiber was measured. As the measuring device, the automatic contact angle meter MCA-J manufactured by Kyowa Interface Science Co., Ltd. was used. The contact angle is measured using deionized water. The amount of liquid ejected from an inkjet water droplet ejector (manufactured by Cluster Technology, a pulse jet CTC-25 with an aperture of 25 μm) was set to 20 picoliters, and the water droplets were dropped directly above the fiber. Record the dripping situation to a high-speed recording device connected to a horizontally set camera. From the point of view of subsequent image analysis, the video recording device is preferably a personal computer equipped with a high-speed capture device. In this measurement, the image was recorded every 17msec. In the recorded image, with the attached software FAMAS (the software version is set to 2.6.2, the analysis method is set to the droplet method, the analysis method is set to the θ/2 method, and the image processing algorithm is set to no reflection. The image processing image mode is set to the frame, the threshold level is set to 200, and no curvature correction is performed) Image analysis is performed on the initial image of the water droplet on the fiber, and the surface of the water droplet in contact with the air and the fiber are calculated. Angle and set it as the contact angle. The fiber taken out from the measurement object is cut to a fiber length of 1mm, and the fiber is placed on a contact angle meter. This station is maintained at a level. For each fiber, measure the contact angle of two different parts. Measure the contact angle of N=5 to 1 decimal point, and define the average of the measured values of 10 locations (rounded to the second decimal point) as the contact angle between the fiber and water. The measurement environment is set to room temperature 22±2°C and humidity 65±2%RH.
再者,於測定對象之吸收體(吸收性芯體)用作吸收性物品等其他物品之構成構件並取出該吸收體進行評價測定之情況下,於該吸收體藉由接著劑、熔合等而固定於其他構成構件之情形時,在不對纖維之接觸角產生影響之範圍內,利用吹送冷噴霧之冷風等方法去除接著力之後將其固定部分取出。該順序於本案說明書中之所有測定中共通。 Furthermore, when the absorber (absorbent core) of the object to be measured is used as a constituent member of other articles such as absorbent articles, and the absorber is taken out for evaluation and measurement, the absorber is formed by adhesive, fusion, etc. In the case of fixing to other structural members, within the range that does not affect the contact angle of the fiber, use methods such as blowing cold spray to remove the adhesive force and then take out the fixed part. This sequence is common to all determinations in the specification of this case.
作為吸水性纖維12F,可使用先前用作此種吸收性物品之吸收體之形成材料之吸水性纖維,例如,可列舉:針葉樹紙漿或闊葉樹紙漿等木漿、棉紙漿或麻紙漿等非木漿等天然纖維;陽離子化紙漿、絲光化紙漿等改性紙漿等;可單獨使用其等之1種或將2種以上混合使用。吸水性纖維之中,尤佳為纖維素系之吸水性纖維。
As the water-
於吸收性芯體40中,纖維塊11與吸水性纖維12F之含有質量比並無特別限定,根據纖維塊11之構成纖維(弱吸水性之合成纖維)11F及吸水性纖維12F之種類等適當調整即可。例如,於纖維塊11之構成纖維11F為非吸水性纖維即熱塑性纖維,吸水性纖維12F為纖維素系之吸水性纖維之情形時,就更確實地取得本發明之特定之效果之觀點而言,纖維塊11與吸水性纖維12F之含有質量比以前者(纖維塊11)/後者(吸水性纖維12F)計較佳為20/80~80/20,進而較佳為40/60~60/40。
In the
吸收性芯體40中之纖維塊11之含量相對於乾燥狀態之吸收性芯體40之總質量,較佳為20質量%以上,進而較佳為40質量%以上,並
且,較佳為80質量%以下,進而較佳為60質量%以下。
The content of the
吸收性芯體40中之吸水性纖維12F之含量相對於乾燥狀態之吸收性芯體40之總質量,較佳為20質量%以上,進而較佳為40質量%以上,並且,較佳為80質量%以下,進而較佳為60質量%以下。
The content of the
吸收性芯體40中之纖維塊11之基重較佳為32g/m2以上,進而較佳為80g/m2以上,並且,較佳為640g/m2以下,進而較佳為480g/m2以下。
The
吸收性芯體40中之吸水性纖維12F之基重較佳為32g/m2以上,進而較佳為80g/m2以上,並且,較佳為640g/m2以下,進而較佳為480g/m2以下。
The basis weight of the
吸收性芯體40亦可含有除纖維塊11及吸水性纖維12F以外之其他成分,作為其他成分,可例示吸水性聚合物。作為吸水性聚合物,一般使用粒子狀者,但亦可為纖維狀者。於使用粒子狀之高吸水性聚合物之情形時,其形狀可為球狀、塊狀、袋狀或不定形之任一者。吸水性聚合物之平均粒徑較佳為10μm以上,進而較佳為100μm以上,並且,較佳為1000μm以下,進而較佳為800μm以下。作為吸水性聚合物,一般可使用丙烯酸或丙烯酸鹼金屬鹽之聚合物或共聚物。作為其例,可列舉聚丙烯酸及其鹽、以及聚甲基丙烯酸及其鹽。
The
吸收性芯體40中之吸水性聚合物之含量相對於乾燥狀態之吸收性芯體40之總質量,較佳為5質量%以上,進而較佳為10質量%以上,並且,較佳為60質量%以下,進而較佳為40質量%以下。
The content of the water-absorbent polymer in the
吸收性芯體40中之吸水性聚合物之基重較佳為10g/m2以上,進而較佳為30g/m2以上,並且,較佳為100g/m2以下,進而較佳為70g/m2以
下。
The basis weight of the water-absorbing polymer in the
吸收性芯體40之基重只要根據其用途等適當調整即可。例如,於吸收性芯體40之用途為拋棄式尿布或經期衛生棉等吸收性物品之吸收體之情形時,吸收性芯體40之基重較佳為100g/m2以上,進而較佳為200g/m2以上,並且,較佳為800g/m2以下,進而較佳為600g/m2以下。
The basis weight of the
具有如上所述之構成之吸收性芯體40及具備該吸收性芯體40之如衛生棉1般之吸收性物品柔軟且緩衝性優異,並且壓縮回覆性亦優異,對外力響應性良好地變形,若解除外力,則快速恢復至原本之狀態。具備此種吸收體(吸收性芯體)之吸收性物品之特性可將壓縮功量(WC)及回覆功量(WC')作為尺度而進行評價。壓縮功量係成為吸收性物品之緩衝性之尺度者,可評價為,WC值越大,緩衝性越高。回覆功量係表示將吸收性物品壓縮並解除壓縮狀態時之回覆之程度之尺度,可評價為,WC'值越大,壓縮回覆性越高。又,若考慮吸收保持液體之吸收性芯體40之作用,則不僅於乾燥狀態下,而且於吸收體液等成為濕潤狀態之情形時,吸收性物品亦較佳為WC值及WC'值較大。為了使吸收性物品於濕潤狀態下具有此種特性,如上所述,有效方法為使用如熱塑性纖維般之非吸水性之合成纖維作為纖維塊11之構成纖維11F。
The
吸收性物品之乾燥狀態下之壓縮功量(d-WC)較佳為80mN.cm/cm2以上,進而較佳為90mN.cm/cm2以上,並且,較佳為150mN.cm/cm2以下,進而較佳為110mN.cm/cm2以下。 The compression work (d-WC) in the dry state of the absorbent article is preferably 80mN. cm/cm 2 or more, more preferably 90 mN. cm/cm 2 or more, and preferably 150 mN. cm/cm 2 or less, more preferably 110 mN. cm/cm 2 or less.
吸收性物品之濕潤狀態下之壓縮功量(w-WC)較佳為70mN.cm/cm2以上,進而較佳為80mN.cm/cm2以上,並且,較佳為150mN.cm/cm2以下,進而較佳為110mN.cm/cm2以下。 The compressive work (w-WC) of the absorbent article in a wet state is preferably 70mN. cm/cm 2 or more, more preferably 80 mN. cm/cm 2 or more, and preferably 150 mN. cm/cm 2 or less, more preferably 110 mN. cm/cm 2 or less.
吸收性物品之乾燥狀態下之回覆功量(d-WC')較佳為34mN.cm/cm2以上,進而較佳為44mN.cm/cm2以上,並且,較佳為150mN.cm/cm2以下,進而較佳為60mN.cm/cm2以下。 The response work (d-WC') of the absorbent article in a dry state is preferably 34mN. cm/cm 2 or more, more preferably 44 mN. cm/cm 2 or more, and preferably 150 mN. cm/cm 2 or less, more preferably 60 mN. cm/cm 2 or less.
吸收性物品之濕潤狀態下之回覆功量(w-WC')較佳為15mN.cm/cm2以上,進而較佳為25mN.cm/cm2以上,並且,較佳為150mN.cm/cm2以下,進而較佳為55mN.cm/cm2以下。 The response work (w-WC') of the absorbent article in a wet state is preferably 15mN. cm/cm 2 or more, more preferably 25 mN. cm/cm 2 or more, and preferably 150 mN. cm/cm 2 or less, more preferably 55 mN. cm/cm 2 or less.
一般已知,吸收性物品之壓縮功量(WC)及回覆功量(WC')可由利用加多技術股份有限公司製造之KES(KAWABATA EVALUATION SYSTEM)之測定值表示(參考文獻:質感評價之標準化及解析(第2版),著者 川端季雄,昭和55年7月10日發行)。具體而言,可利用加多技術股份有限公司製造之自動化壓縮試驗裝置KES-G5測定壓縮功量及回覆功量。測定順序如下所述。 It is generally known that the compression work (WC) and response work (WC') of absorbent articles can be expressed by the measured values of KES (KAWABATA EVALUATION SYSTEM) manufactured by Kato Technology Co., Ltd. (Reference: Standardization of Texture Evaluation And analysis (2nd edition), author Kawabata Yoshio, published on July 10, Showa 55). Specifically, the automatic compression test device KES-G5 manufactured by Jiaduo Technology Co., Ltd. can be used to measure the compression power and the response power. The measurement procedure is as follows.
將作為試樣之「具備吸收體之吸收性物品(經期衛生棉)」安裝於壓縮試驗裝置之試驗台。其次,將該試樣於具有面積2cm2之圓形平面之鋼板間壓縮。壓縮速度係設為0.02cm/sec,壓縮最大負載係設為490mN/cm2。回覆過程亦以同一速度進行測定。壓縮功量(WC)及回覆功量(WC')分別由下式表示。式中,Tm、To分別表示490mN/cm2負載時之厚度、4.9mN/cm2負載時之厚度。又,Pa表示測定時(壓縮過程)之負載(mN/cm2),Pb表示測定時(回覆過程)之負載(mN/cm2)。 Install the "absorbent article with absorber (menstrual sanitary napkin)" as the sample on the test bench of the compression test device. Next, the sample was compressed between steel plates having a circular flat surface with an area of 2 cm 2. The compression speed is set to 0.02 cm/sec, and the maximum compression load is set to 490 mN/cm 2 . The reply process is also measured at the same speed. The compression work (WC) and the response work (WC') are respectively expressed by the following formulas. Wherein, T m, T o represents a thickness of each thickness of 490mN / cm 2 load, 4.9mN / cm 2 load. In addition, P a represents the load (mN/cm 2 ) during the measurement (compression process), and P b represents the load (mN/cm 2 ) during the measurement (return process).
再者,上述測定方法之測定對象即「具備乾燥狀態之吸收體之吸收性物品」係藉由將乾燥狀態之吸收性物品放置於氣溫23℃、相對濕度50%RH之環境下24小時而製備。又,上述測定方法之測定對象即「具備濕潤狀態之吸收體之吸收性物品」係將乾燥狀態之吸收性物品以正面片材側(肌膚對向面側)成為上側之方式水平放置,於該正面片材上放置橢圓形注入口(長徑50mm、短徑23mm),自該注入口注入3.0g脫纖維馬血,靜置1分鐘之後進而注入3.0g脫纖維馬血,注入後1分鐘保持其狀態而製備。再者,注入至測定對象之脫纖維馬血係NIPPON BIOTEST(股)製造之脫纖維馬血且液溫25℃下之黏度調整為8cp者,又,該黏度係於東機產業股份有限公司製造之TVB-10M形黏度計中,利用轉子名稱L/Adp(轉子編碼19)之轉子以旋轉速度12rpm測定之情形之黏度。 Furthermore, the measurement object of the above-mentioned measurement method, which is "absorbent article with absorbent body in a dry state", is prepared by placing the absorbent article in a dry state in an environment with a temperature of 23°C and a relative humidity of 50%RH for 24 hours. . In addition, the measurement object of the above-mentioned measurement method, namely "absorbent article with absorbent body in a wet state", is to place the absorbent article in a dry state horizontally so that the front sheet side (the side facing the skin) becomes the upper side. An oval injection port (50 mm long diameter and 23 mm short diameter) is placed on the front sheet, 3.0 g of defibrinated horse blood is injected from the injection port, and 3.0 g of defibrinated horse blood is injected after standing for 1 minute, and kept for 1 minute after injection Prepared in its state. In addition, the defibrinated horse blood that was injected into the measuring object was made by NIPPON BIOTEST (stock) and the viscosity was adjusted to 8cp at a liquid temperature of 25°C, and the viscosity was manufactured by Toki Industrial Co., Ltd. In the TVB-10M type viscometer, the viscosity of the rotor with the rotor name L/Adp (rotor code 19) is measured at a rotation speed of 12 rpm.
吸收性芯體40可與包含此種纖維材料之吸收性芯體(吸收體)同樣地製造。如上所述,如圖6所示,纖維塊11可藉由使用切割器等切斷器件,將成為原料之原料纖維片材(與纖維塊11相同組成且尺寸大於纖維塊11之片材)於相互交叉(正交)之2個方向切斷而製造,以此方式製造之複數個纖維塊11係形狀及尺寸均勻之「定形之纖維集合體」(例如,本體部110為長方體形狀)。包含纖維塊11及吸水性纖維12F之吸收性芯體40例如可根據慣例使用具備旋轉轉筒之公知之纖維堆積裝置而製造。典型而言,該纖維堆積裝置具備:旋轉轉筒,其於外周面形成有集聚用凹部;及導管,其於內部具有將吸收性芯體40之原材料(纖維塊11、吸水性纖維12F)搬送至該集聚用凹部之流路;一面使該旋轉轉筒沿其轉筒周向繞旋轉
軸旋轉,一面使隨著藉由來自該旋轉轉筒之內部側之抽吸於該流路中產生之空氣流(真空空氣)而搬送之原材料纖維堆積於該集聚用凹部。
The
以上,針對本發明,基於其實施形態而進行了說明,但本發明並不限於上述實施形態,可適當進行變更。 As mentioned above, the present invention has been described based on its embodiments, but the present invention is not limited to the above-mentioned embodiments and can be appropriately modified.
例如,於本發明之吸收性芯體中,纖維塊亦可不均勻地分散存在於吸收性芯體整體,亦可偏集存在。作為纖維塊偏集存在之形態,可例示具有纖維塊構成主體之層與吸水性纖維構成主體之層之積層構造之吸收性芯體。 For example, in the absorbent core of the present invention, the fiber blocks may be unevenly dispersed throughout the absorbent core, or may be concentrated. As the form in which the fiber masses are concentrated, there can be exemplified an absorbent core having a laminated structure of a layer of the fiber mass constituting the main body and a layer of the water-absorbent fiber constituting the main body.
又,本發明之吸收性芯體亦可並非其中含有之所有纖維塊(弱吸水性之合成纖維集合體)均為如纖維塊11般之定形之纖維集合體,只要為不脫離本發明之主旨之範圍,則除了該定形之纖維集合體以外,亦可進而包含極少量不定形之纖維集合體。 In addition, the absorbent core of the present invention may not contain all the fiber blocks (weakly absorbent synthetic fiber aggregates) that are shaped like fiber blocks 11, as long as they do not deviate from the gist of the present invention. In addition to the fixed fiber assembly, the range may further include a very small amount of indefinite fiber assembly.
本發明之吸收性物品廣泛包含用於自人體排出之體液(尿、軟便、經血、汗等)之吸收之物品,除了上述經期衛生棉以外,亦包含經期短褲(shorts)、具有固定帶之所謂展開型之拋棄式尿布、短褲(pants)型之拋棄式尿布、失禁護墊等。關於上述本發明之實施形態,進而揭示以下之附記。 The absorbent article of the present invention widely includes articles for absorbing body fluids (urine, soft stools, menstrual blood, sweat, etc.) discharged from the human body. In addition to the above-mentioned menstrual sanitary napkins, it also includes menstrual shorts and so-called fixed belts. Expandable disposable diapers, pants disposable diapers, incontinence pads, etc. Regarding the above-mentioned embodiments of the present invention, the following additional notes will be further disclosed.
<1>一種吸收性物品,其係具有與穿著者之前後方向對應之縱向及與其正交之橫向,且具備吸收體、及配置於該吸收體之肌膚對向面側之正面片材者,上述吸收體係包含液體吸收性之吸收性芯體、及被覆該吸收性芯體之肌膚對向面之包芯片材而構成,該吸收性芯體包含吸水性纖維、及含有吸水性低於該吸水性纖維之弱吸水性之纖維的纖維塊;由下述方法測得之上述吸收性芯體之液體擴散面積與由下述方法測得之上述 包芯片材之液體擴散面積之比率以前者/後者計為0.7以上。 <1> An absorbent article which has a longitudinal direction corresponding to the front and back directions of the wearer and a transverse direction orthogonal thereto, and is provided with an absorbent body and a front sheet disposed on the skin facing side of the absorbent body, The above-mentioned absorbent system is composed of a liquid-absorbing absorbent core and a core covering material covering the skin facing surface of the absorbent core. The fiber block of the weakly absorbent fiber of the sexual fiber; the liquid diffusion area of the above-mentioned absorbent core measured by the following method and the above-mentioned measured by the following method The ratio of the former/the latter of the liquid diffusion area of the core-coated sheet is 0.7 or more.
於相對於水平面具有45°之角度之斜面上,將測定對象以使其肌膚對向面朝向該斜面之方式固定,耗費23秒鐘將1.5g脫纖維馬血注入至測定對象之肌膚對向面,放置3分鐘後,再次進行耗費相同時間將同量之脫纖維馬血注入至相同注入部位之操作,反覆進行6次該脫纖維馬血之注入、放置操作,將合計9g之脫纖維馬血注入至測定對象,注入操作完成後,對測定對象之肌膚對向面中之脫纖維馬血之擴散面積進行測定,並將其作為該測定對象之液體擴散面積。
On an inclined surface having an angle of 45° with respect to the horizontal plane, the measurement object is fixed so that the opposite side of the skin faces the inclined surface, and it takes 23 seconds to inject 1.5 g of defibrinated horse blood into the opposite surface of the measured object’s skin. After leaving for 3 minutes, perform the operation of injecting the same amount of defibrinated horse blood into the same injection site again, which takes the same amount of time, and repeat the injection and placing operations of the
<2>如上述<1>所記載之吸收性物品,其中上述包芯片材係以紙漿為主體之多孔性片材。 <2> The absorbent article as described in the above <1>, wherein the core covering material is a porous sheet mainly composed of pulp.
<3>如上述<1>或<2>所記載之吸收性物品,其中於上述吸收體之肌膚對向面,局部地形成有上述包芯片材及上述吸收性芯體向該吸收體之非肌膚對向面側一體地凹陷之凹陷部。 <3> The absorbent article as described in the above <1> or <2>, in which the skin-facing surface of the absorbent body is partially formed with the core-clad material and the absorbent core facing the absorbent body. The sunken part that is integrally sunken on the opposite side of the skin.
<4>如上述<3>所記載之吸收性物品,其中上述吸收性物品於縱向上分為:縱中央區域,其包含與穿著者之排泄部對向之排泄部對向部;前方區域,其配置於較該排泄部對向部更靠穿著者之腹側;及後方區域,其配置於較該排泄部對向部更靠穿著者之背側;上述凹陷部以包圍上述縱中央區域之橫向中央部之方式形成。 <4> The absorbent article as described in the above <3>, wherein the absorbent article is divided in the longitudinal direction: a longitudinal central area, which includes an excretion part facing part facing the wearer's excretion part; and a front area, It is arranged on the ventral side of the wearer than the opposite part of the excretion part; and the rear area is arranged on the back side of the wearer than the opposite part of the excretion part; the recessed part surrounds the longitudinal central area It is formed in the horizontal center.
<5>如上述<1>至<4>中任一項所記載之吸收性物品,其中上述纖維塊之外形為長方體狀或圓盤狀。 <5> The absorbent article as described in any one of the above <1> to <4>, wherein the outer shape of the fiber block is a rectangular parallelepiped shape or a disc shape.
<6>如上述<1>至<5>中任一項所記載之吸收性物品,其中上述纖維塊具有纖維密度相對較高之本體部、及存在於該本體部 之周圍且與該本體部相比纖維密度更低之延出纖維部,複數個上述纖維塊彼此相互交絡,並且上述纖維塊與上述吸水性纖維相互交絡。 <6> The absorbent article as described in any one of the above <1> to <5>, wherein the fiber block has a body portion with a relatively high fiber density, and is present in the body portion A plurality of the above-mentioned fiber blocks are intertwined with each other, and the above-mentioned fiber blocks and the above-mentioned water-absorbent fibers are intertwined with each other in the extended fiber part with a lower fiber density than the main body part.
<7>如上述<6>所記載之吸收性物品,其中上述本體部具有2個對向之基本面、及連結該2個基本面之骨架面,該基本面於俯視下呈四邊形形狀。 <7> The absorbent article as described in the above <6>, wherein the main body has two opposing basic surfaces and a skeleton surface connecting the two basic surfaces, and the basic surface has a quadrangular shape in a plan view.
<8>如上述<7>所記載之吸收性物品,其中上述2個基本面之總面積大於上述骨架面之總面積。 <8> The absorbent article as described in the above <7>, wherein the total area of the two basic surfaces is greater than the total area of the skeleton surface.
<9>如上述<7>或<8>所記載之吸收性物品,其中上述纖維塊具有延出纖維束部,該延出纖維束部包含自上述骨架面向外側延伸之複數條纖維。 <9> The absorbent article according to the above <7> or <8>, wherein the fiber block has an extended fiber bundle portion, and the extended fiber bundle portion includes a plurality of fibers extending outward from the skeleton surface.
<10>如上述<9>所記載之吸收性物品,其中上述延出纖維束部具有複數條纖維相互熱熔而成之部位。 <10> The absorbent article as described in the above <9>, wherein the extended fiber bundle portion has a portion where a plurality of fibers are fused to each other by heat.
<11>如上述<9>或<10>所記載之吸收性物品,其中上述延出纖維束部自上述本體部之延出長度、較佳為自上述骨架面之延出長度為0.05mm以上且7mm以下,較佳為0.15mm以上且4mm以下。 <11> The absorbent article as described in the above <9> or <10>, wherein the extended length of the extended fiber bundle portion from the main body, preferably the extended length from the frame surface is 0.05 mm or more And 7 mm or less, preferably 0.15 mm or more and 4 mm or less.
<12>如上述<7>至<11>中任一項所記載之吸收性物品,其中上述基本面於俯視下呈長方形形狀,該長方形形狀之短邊與上述吸收體之厚度同等或與其相比更短。 <12> The absorbent article as described in any one of the above <7> to <11>, wherein the basic surface has a rectangular shape in a plan view, and the short side of the rectangular shape is equal to or the same as the thickness of the absorbent body Shorter than.
<13>如上述<12>所記載之吸收性物品,其中上述基本面之短邊之長度與上述吸收體之厚度之比率以前者/後者計為0.03以上且1以下,較佳為0.08以上且0.5以下。 <13> The absorbent article as described in the above <12>, wherein the ratio of the length of the shorter side of the basic surface to the thickness of the absorbent body is 0.03 or more and 1 or less, preferably 0.08 or more, and 0.5 or less.
<14>如上述<12>或<13>所記載之吸收性物品,其中上述基本面之短邊之長度為0.3mm以上且10mm以下,較佳為0.5mm以上且6mm 以下。 <14> The absorbent article as described in the above <12> or <13>, wherein the length of the short side of the basic surface is 0.3mm or more and 10mm or less, preferably 0.5mm or more and 6mm the following.
<15>如上述<12>至<14>中任一項所記載之吸收性物品,其中上述基本面之長邊之長度為0.3mm以上且30mm以下,較佳為2mm以上且15mm以下。 <15> The absorbent article as described in any one of the above <12> to <14>, wherein the length of the long side of the basic surface is 0.3 mm or more and 30 mm or less, preferably 2 mm or more and 15 mm or less.
<16>如上述<7>至<15>中任一項所記載之吸收性物品,其中存在於上述基本面之纖維端部之每單位面積之數量N1與存在於上述骨架面之纖維端部之每單位面積之數量N2之比率N1/N2為0以上且0.90以下,較佳為0.05以上且0.60以下。 <16> The absorbent article as described in any one of the above <7> to <15>, wherein the number of fiber ends per unit area N 1 existing on the above-mentioned basic surface and the number of fiber ends existing on the above-mentioned skeleton surface are The ratio N 1 /N 2 of the number N 2 per unit area of the part is 0 or more and 0.90 or less, preferably 0.05 or more and 0.60 or less.
<17>如上述<7>至<16>中任一項所記載之吸收性物品,其中存在於上述基本面之纖維端部之每單位面積之數量為0個/mm2以上且8個/mm2以下,較佳為3個/mm2以上且6個/mm2以下。 <17> The absorbent article as described in any one of the above <7> to <16>, wherein the number per unit area of the fiber end portion existing on the above-mentioned basic surface is 0 pieces/mm 2 or more and 8 pieces/ mm 2 or less, preferably 3 pieces/mm 2 or more and 6 pieces/mm 2 or less.
<18>如上述<7>至<17>中任一項所記載之吸收性物品,其中存在於上述骨架面之纖維端部之每單位面積之數量為5個/mm2以上且50個/mm2以下,較佳為8個/mm2以上且40個/mm2以下。 <18> The absorbent article as described in any one of the above <7> to <17>, wherein the number per unit area of the fiber ends existing on the frame surface is 5 pieces/mm 2 or more and 50 pieces/ mm 2 or less, preferably 8 pieces/mm 2 or more and 40 pieces/mm 2 or less.
<19>如上述<1>至<18>中任一項所記載之吸收性物品,其中上述纖維塊具有複數個熱塑性纖維相互熱熔而成之三維構造。 <19> The absorbent article as described in any one of the above <1> to <18>, wherein the fiber block has a three-dimensional structure in which a plurality of thermoplastic fibers are fused to each other.
<20>如上述<1>至<19>中任一項所記載之吸收性物品,其中上述纖維塊與上述吸水性纖維之含有質量比以前者/後者計為20/80~80/20。 <20> The absorbent article as described in any one of the above <1> to <19>, wherein the content ratio of the fiber block to the water-absorbent fiber is 20/80 to 80/20 in terms of the former/the latter.
<21>如上述<1>至<20>中任一項所記載之吸收性物品,其中於上述吸收體中,上述纖維塊除了藉由交絡而與其他纖維塊或上述吸水性纖維結合以外,亦以可與其他纖維塊或上述吸水性纖維交絡之狀態存在。 <21> The absorbent article according to any one of the above <1> to <20>, wherein in the absorbent body, the fiber block is combined with other fiber blocks or the water-absorbent fiber by entanglement, It also exists in a state where it can be intertwined with other fiber blocks or the above-mentioned water-absorbent fibers.
<22>如上述<1>至<21>中任一項所記載之吸收性物品,其中具 有與其他上述纖維塊或上述吸水性纖維之結合部之上述纖維塊之總數之70%以上、較佳為80%以上係該結合部藉由纖維之交絡而形成者。 <22> The absorbent article as described in any one of <1> to <21> above, which has More than 70%, preferably more than 80%, of the total number of the fiber blocks having a bonding portion with other fiber blocks or the water-absorbent fibers are formed by the entanglement of fibers.
<23>如上述<1>至<22>中任一項所記載之吸收性物品,其中上述纖維塊來源於不織布。 <23> The absorbent article as described in any one of the above <1> to <22>, wherein the fiber block is derived from a non-woven fabric.
<24>如上述<1>至<23>中任一項所記載之吸收性物品,其中上述包芯片材之密度為0.1g/m3以下。 <24> The absorbent article as described in any one of <1> to <23> above, wherein the density of the core-coated material is 0.1 g/m 3 or less.
<25>如上述<1>至<24>中任一項所記載之吸收性物品,其中上述包芯片材之密度為0.1g/m3以下,較佳為0.08g/m3以下,又,為0.02g/m3以上,較佳為0.04g/m3以上。 <25> The absorbent article as described in any one of the above <1> to <24>, wherein the density of the core covering material is 0.1 g/m 3 or less, preferably 0.08 g/m 3 or less, and, It is 0.02 g/m 3 or more, preferably 0.04 g/m 3 or more.
<26>如上述<1>至<25>中任一項所記載之吸收性物品,其中上述包芯片材之基重為50g/m2以下,較佳為30g/m2以下,又,為5g/m2以上,較佳為10g/m2以上。 <26> The absorbent article as described in any one of the above <1> to <25>, wherein the basis weight of the core covering material is 50 g/m 2 or less, preferably 30 g/m 2 or less, and 5 g/m 2 or more, preferably 10 g/m 2 or more.
以下,藉由實施例而對本發明進一步具體地進行說明,但本發明並不限定於該實施例。 Hereinafter, the present invention will be described in more detail with examples, but the present invention is not limited to these examples.
製作與圖1所示之衛生棉1同樣之構成之經期衛生棉。
A menstrual sanitary napkin with the same composition as the
作為正面片材,使用基重30g/m2之熱風不織布,作為背面片材,使用37g/m2之聚乙烯樹脂製膜。吸收體係將纖維塊及吸水性纖維用作吸收性芯體之纖維材料,進而使用另行準備之包芯片材,並使用公知之纖維堆積裝置,根據慣例而製造。纖維塊之製造係依據圖6,將原料纖維片材切斷為丁狀而製造。 As the top sheet, a hot-air nonwoven fabric with a basis weight of 30 g/m 2 was used, and as the back sheet, a film made of 37 g/m 2 polyethylene resin was used. The absorbent system uses fiber blocks and water-absorbent fibers as the fiber material of the absorbent core, and then uses a separately prepared core-cladding material, and uses a well-known fiber stacking device, and is manufactured according to conventional practices. The fiber block is manufactured by cutting the raw fiber sheet into D-shapes according to Fig. 6.
作為纖維塊之原料纖維片材,使用以包含聚乙烯樹脂及聚對苯二甲酸乙二酯樹脂之熱塑性纖維(纖維直徑18μm)為構成纖維之基重21g/m2之熱風不織布(具有構成纖維彼此之熱熔部之纖維片材)。作為吸水性纖維,使用纖維直徑22μm之針葉樹曬乾牛皮紙漿(NBKP)。用於吸收體之纖維塊(定形之合成纖維集合體)具有如圖5(a)所示之長方體形狀之本體部,其基本面111之短邊111a為0.8mm,長邊111b為3.9mm,厚度T為0.6mm。又,基本面111中之纖維端部之每單位面積之數量為3.2個/mm2,骨架面112中之纖維端部之每單位面積之數量為19.2個/mm2。吸收體之基重為350g/m2,厚度為5.7mm。
As raw material fibers of the fiber sheet block, used to contain a polyethylene resin and a polyethylene thermoplastic fibers (fiber diameter 18 m) terephthalate resin constituting the fibers of basis weight of 21g / m 2 of a hot-air nonwoven fabric (fibers constituting having The fiber sheet of the hot-melt part of each other). As the water-absorbent fiber, conifer sun-dried kraft pulp (NBKP) with a fiber diameter of 22 μm was used. The fiber block (formed synthetic fiber assembly) used for the absorbent body has a rectangular parallelepiped body as shown in Figure 5(a). The
實施例1及2中使用之包芯片材(上述多孔性片材)之詳細內容如下所述。(實施例1之包芯片材) The details of the core-coated sheet (the above-mentioned porous sheet) used in Examples 1 and 2 are as follows. (Chip-coated material of Example 1)
使用針葉樹曬乾牛皮紙漿(NBKP)製、基重13.5g/m2、密度0.092g/cm3之紙。 The paper is made of conifer sun-dried kraft pulp (NBKP), with a basis weight of 13.5 g/m 2 and a density of 0.092 g/cm 3 .
使用實施了絲光化處理之真圓度為0.80之針葉樹曬乾牛皮紙漿(NBKP)且基重16.0g/m2、密度0.069g/cm3之紙。 The paper used mercerizing treatment with conifer sun-dried kraft pulp (NBKP) with a roundness of 0.80 and a basis weight of 16.0 g/m 2 and a density of 0.069 g/cm 3 .
將市售之經期衛生棉(Unicharm股份有限公司製造,商品名「Tanom Pew slim 23cm」)直接作為比較例1。比較例1之經期衛生棉中之吸收體係混合有合成纖維(弱吸水性之纖維)及纖維素系纖維(吸水性纖維)者,故而不包含纖維塊。 A commercially available menstrual sanitary napkin (manufactured by Unicharm Co., Ltd., trade name "Tanom Pew slim 23cm") was directly used as Comparative Example 1. The absorbent system in the menstrual sanitary napkin of Comparative Example 1 contains synthetic fibers (weakly absorbent fibers) and cellulosic fibers (water absorbent fibers), so it does not contain fiber blocks.
將吸收體變更為下述者,除此以外,與實施例1同樣地製作經期衛生棉,並作為比較例2。 Except having changed the absorber into the following, the menstrual napkin was produced in the same manner as in Example 1, and it was taken as Comparative Example 2.
比較例2中使用之吸收體使用不定形之不織布片作為吸收性芯體中之纖維塊,且利用包芯片材將吸收性芯體被覆之後實施熱風處理加工,使該吸收性芯體中包含之該不織布片彼此相互熱熔,除此以外,與實施例1中使用之吸收體相同。於上述對吸收體實施之熱風處理加工中,將不織布片與紙漿纖維之混合集合體(長度240mm×寬度75mm)靜置於溫度150℃之電乾燥機(例如,ISUZU製作所股份有限公司製造)內10分鐘,而使不織布片彼此熱熔。所使用之不定形之不織布片係藉由將與實施例1中使用之熱風不織布相同者向任意之方向撕下而製造,其俯視下之兩端間距長度大概為25mm左右。 The absorbent body used in Comparative Example 2 used an indefinite non-woven fabric sheet as the fiber block in the absorbent core, and the absorbent core was coated with a core-clad material, and then subjected to hot air treatment to make the absorbent core contained The non-woven fabric sheets were thermally fused to each other, except for this, the same as the absorber used in Example 1. In the above-mentioned hot air treatment of the absorbent body, the mixed assembly (length 240mm×width 75mm) of the non-woven fabric sheet and the pulp fiber is placed in an electric dryer (for example, manufactured by ISUZU Manufacturing Co., Ltd.) at a temperature of 150°C. For 10 minutes, the non-woven fabric pieces are heat-melted to each other. The non-shaped non-woven fabric sheet used was manufactured by tearing off the same hot-air non-woven fabric used in Example 1 in any direction, and the distance between the two ends of the non-woven fabric sheet in the plan view was about 25 mm.
將吸收體變更為下述者,除此以外,與實施例1同樣地製作經期衛生棉,並作為比較例3。關於比較例3中使用之吸收體,吸收性芯體中不包含纖維塊,僅包含上述吸水性纖維。作為包芯片材(上述多孔性片材),使用基重16.0g/m2、密度0.102g/cm3之針葉樹曬乾牛皮紙漿(NBKP)。 Except changing the absorber to the following, the menstrual sanitary napkin was produced in the same manner as in Example 1, and it was taken as Comparative Example 3. Regarding the absorbent body used in Comparative Example 3, the absorbent core does not contain fiber blocks, but only contains the above-mentioned water-absorbent fibers. As the core-wrap material (the above-mentioned porous sheet), a conifer sun-dried kraft pulp (NBKP) having a basis weight of 16.0 g/m 2 and a density of 0.102 g/cm 3 was used.
針對各實施例及比較例之經期衛生棉,藉由上述方法測定吸收性芯體及肌膚側包芯片材各者之液體擴散面積,基於其測定值而算出液體擴散面積比率(吸收性芯體之液體擴散面積/包芯片材之液體擴散面積)。又,藉 由上述方法測定壓縮功量(WC)及回覆功量(WC'),並基於其等之測定值而對緩衝性及壓縮回覆性進行評價。將結果示於下述表1中。 Regarding the menstrual sanitary napkins of the respective Examples and Comparative Examples, the liquid diffusion area of each of the absorbent core and the skin-side core covering material was measured by the above-mentioned method, and the liquid diffusion area ratio (absorbent core's Liquid diffusion area/liquid diffusion area of chip-coated material). Again, borrow The compression work (WC) and the recovery work (WC') were measured by the above-mentioned method, and the cushioning properties and the compression recovery performance were evaluated based on the measured values. The results are shown in Table 1 below.
如表1所示,各實施例之複數個纖維塊彼此相互交絡,且液體擴散面積比率(吸收性芯體之液體擴散面積/包芯片材之液體擴散面積)為0.7以上,因此,與不滿足其等之先前技術即比較例1~3相比,於乾燥狀態及濕潤狀態之任一狀態下,壓縮功量(WC)及回覆功量(WC')之值均更大,因此,於兩狀態下,緩衝性及壓縮回覆性優異。又,各實施例之液體擴散面積比率處於上述特定範圍,故而自正面片材經由肌膚側包芯片材向吸收性芯體之液體透過性優異。因此,各實施例係體液排泄後體液不易殘留於吸收體之肌膚對向面側者。 As shown in Table 1, a plurality of fiber blocks in each embodiment are intertwined with each other, and the liquid diffusion area ratio (liquid diffusion area of the absorbent core/liquid diffusion area of the core-clad material) is 0.7 or more. Therefore, it is not satisfied Compared with the prior art, that is, Comparative Examples 1 to 3, the compression work (WC) and the recovery work (WC') values are larger in any of the dry state and the wet state. Therefore, in the two In the state, it has excellent cushioning properties and compression recovery properties. In addition, since the liquid diffusion area ratio of each example is in the above-mentioned specific range, the liquid permeability from the surface sheet to the absorbent core through the skin-side core covering material is excellent. Therefore, in each of the Examples, the body fluid is not likely to remain on the opposite side of the skin of the absorber after the body fluid is excreted.
本發明之吸收性物品具備具有較高之緩衝性及液體透過性之吸收體。因此,根據本發明之吸收性物品,體液排泄後體液不易殘留於 吸收體之肌膚對向面側,降低不舒適之肌膚之黏膩或濕潤感,可期待優異之穿著感及服貼性。 The absorbent article of the present invention has an absorbent body with high cushioning properties and liquid permeability. Therefore, according to the absorbent article of the present invention, the body fluid is not likely to remain in the body fluid after excretion The skin facing side of the absorber reduces the sticky or moist feeling of uncomfortable skin, and you can expect excellent wearing feeling and conformability.
1‧‧‧衛生棉 1‧‧‧Sanitary napkins
2‧‧‧正面片材 2‧‧‧Front sheet
3‧‧‧背面片材 3‧‧‧Back sheet
4‧‧‧吸收體 4‧‧‧Absorber
6‧‧‧側部片材 6‧‧‧Side sheet
7‧‧‧凹陷部 7‧‧‧Depression
11‧‧‧纖維塊 11‧‧‧Fiber block
12F‧‧‧吸水性纖維 12F‧‧‧Water Absorbent Fiber
40‧‧‧吸收性芯體 40‧‧‧Absorbent core
41‧‧‧包芯片材 41‧‧‧Packing chip material
Y‧‧‧橫向 Y‧‧‧Horizontal
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JP2013180171A (en) * | 2012-03-05 | 2013-09-12 | Kao Corp | Absorbent article |
CN206120577U (en) * | 2016-08-22 | 2017-04-26 | 重庆百亚卫生用品股份有限公司 | Absorbent articles core and absorbent articles |
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JP3846905B2 (en) * | 1993-06-25 | 2006-11-15 | 花王株式会社 | Absorbent articles |
JP3469300B2 (en) * | 1994-03-25 | 2003-11-25 | 花王株式会社 | Absorbent articles |
JP3811000B2 (en) * | 2000-11-30 | 2006-08-16 | ユニ・チャーム株式会社 | Disposable diapers |
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JP3971136B2 (en) * | 2001-07-12 | 2007-09-05 | ユニ・チャーム株式会社 | Absorbent articles |
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KR102200393B1 (en) * | 2012-10-31 | 2021-01-11 | 킴벌리-클라크 월드와이드, 인크. | Absorbent article |
JP5848312B2 (en) * | 2013-11-21 | 2016-01-27 | 花王株式会社 | Disposable diapers |
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