CN104138312A - Composite water absorption core and preparation method thereof - Google Patents
Composite water absorption core and preparation method thereof Download PDFInfo
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- CN104138312A CN104138312A CN201410408381.7A CN201410408381A CN104138312A CN 104138312 A CN104138312 A CN 104138312A CN 201410408381 A CN201410408381 A CN 201410408381A CN 104138312 A CN104138312 A CN 104138312A
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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
- A61F13/53708—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 the layer having a promotional function on liquid propagation in at least one direction
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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
- A61F2013/530481—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 superabsorbent materials, i.e. highly absorbent polymer gel materials
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- Life Sciences & Earth Sciences (AREA)
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- Absorbent Articles And Supports Therefor (AREA)
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Abstract
Description
技术领域 technical field
本发明属于卫生用品技术领域，具体地说是涉及一种复合吸水芯体及其制备方法。 The invention belongs to the technical field of hygiene products, and in particular relates to a composite water-absorbing core and a preparation method thereof.
背景技术 Background technique
吸水芯体是制造卫生巾、纸尿裤、尿片、护垫等卫生用品的主要材料之一。目前，市面上销售的卫生巾或纸尿裤的吸水芯体或吸收层通常都是由绒毛浆或无纺布构成，为了提高吸水芯体或吸收层的吸收性能，人们在吸水芯体中增加了高分子吸水层，但是这样的卫生巾或纸尿裤在使用过程中，吸水芯体或吸收层容易发生结团、断裂或打卷的情况。这主要是由于使用者活动时会对卫生巾或纸尿裤的施加一个扭曲作用，而吸水芯体吸收大量的液体后会膨胀起来，因此吸水芯体各个部分承受的挤压或拉扯力会不同，从而容易产生吸水芯体结团、断裂或打卷的情况，给卫生巾或纸尿裤的使用者带来不适感；另外由于这种吸水芯体非常的密实，液体的吸收与液体的扩散非常缓慢，这对在短时间内要求吸收大量液体的卫生巾或纸尿裤而言是一个重大的问题，因为短时间内如果不能将液体吸收的话就容易导致液体渗漏，给使用者带来麻烦。 Absorbent core is one of the main materials for manufacturing sanitary products such as sanitary napkins, diapers, diapers, and panty liners. At present, the water-absorbent cores or absorbent layers of sanitary napkins or paper diapers on the market are usually made of fluff pulp or non-woven fabrics. In order to improve the absorption performance of the water-absorbent cores or absorbent layers, people add high Molecular absorbent layer, but during use of such sanitary napkins or diapers, the absorbent core or absorbent layer is prone to agglomeration, breakage or curling. This is mainly because the user will exert a twisting effect on the sanitary napkin or diaper during activities, and the absorbent core will expand after absorbing a large amount of liquid, so the extrusion or pulling force of each part of the absorbent core will be different, thus The water-absorbent core is prone to agglomeration, breakage or curling, which brings discomfort to users of sanitary napkins or diapers; in addition, because the water-absorbent core is very dense, the absorption and diffusion of liquid are very slow, which It is a serious problem for sanitary napkins or paper diapers that need to absorb a large amount of liquid in a short time, because if the liquid cannot be absorbed in a short time, it will easily cause liquid leakage and cause trouble to the user.
中国专利CN 2225487公开了一种高分子吸水复合纸，用纸或织物作面层和底层，中间夹一层加或不加木纤维的吸水树脂层，用胶压合而存在胶粘层。其不足之处在于：面层、底层、芯层的纤维品种单一，均采用单一的木纤维，因而抗拉性差；而且胶层的存在会大大降低纸张的吸水性和纤维膨松度。 Chinese patent CN 2225487 discloses a kind of polymer water-absorbing composite paper. Paper or fabric is used as the top layer and the bottom layer, and a layer of water-absorbing resin layer with or without wood fiber is sandwiched in the middle, and there is an adhesive layer by pressing with glue. Its disadvantages are: the surface layer, the bottom layer, and the core layer have a single fiber variety, and all use a single wood fiber, so the tensile resistance is poor; and the existence of the glue layer will greatly reduce the water absorption and fiber bulk of the paper.
中国专利CN 101797201A公开了一种主要用于纸尿片和纸尿裤，可实现不起坨、不断裂、不脱层的高分子复合芯体及其制备方法。高分子复合芯体设有无尘纸表层、无尘纸底层和膨松无纺布层，膨松无纺布层设于无尘纸表层与无尘纸底层之间且与无尘纸表层和无尘纸底层胶粘剂胶接，膨松无纺布层内均匀渗有吸水树脂。其不足之处在于：（1）无尘纸层孔径较大，高分子吸水树脂容易跑出来，使人体过敏，（2）无纺布上的高分子吸水树脂均匀分布在无纺布内，无法完全发挥高分子吸水树脂的锁水能力，容易造成浪费。 Chinese patent CN 101797201A discloses a polymer composite core which is mainly used for paper diapers and paper diapers and can realize no lumping, no fracture, and no delamination, and its preparation method. The polymer composite core is provided with a dust-free paper surface layer, a dust-free paper bottom layer and a bulky non-woven fabric layer, and the bulky non-woven fabric layer is arranged between the dust-free paper surface layer and the dust-free paper bottom layer The bottom layer of dust-free paper is bonded with adhesive, and the bulky non-woven fabric layer is uniformly permeated with water-absorbing resin. Its disadvantages are: (1) The pore size of the dust-free paper layer is large, and the polymer water-absorbing resin is easy to escape, which makes the human body allergic; (2) The polymer water-absorbing resin on the non-woven fabric is evenly distributed in the non-woven fabric, which cannot It is easy to cause waste if the water-locking ability of the polymer water-absorbing resin is fully utilized.
中国专利CN103637883A公开了一种用于卫生用品的吸水芯体，包括上隔离层、吸水层和下隔离层，所述吸水层由两层以上的瞬吸层和一层以上的锁水层上下相互叠加而成，且吸水层的顶层和底层均为瞬吸层；以重量百分含量计，所述瞬吸层是由50～90%的木浆纤维与10～50%的粘合剂混合制成；所述锁水层由占吸水层重量15～75%的高分子吸水颗粒制成；所述上隔离层或下隔离层采用ES纤维层、无尘纸或无纺布中的一种。该发明将高分子吸水颗粒均匀铺洒在第一瞬吸层上，在液体量较大的情况下很难达到迅速吸收的效果，且保水性能也不会理想，容易发生侧漏等现象，给使用者造成不便；另外，该发明在使用过程中，由于木浆的强力不够大，使用者活动时会对卫生巾或纸尿裤的施加一个扭曲作用，吸水芯体容易结团、断裂或打卷，给使用者带来不适感。 Chinese patent CN103637883A discloses a water-absorbing core for sanitary products, including an upper isolation layer, a water-absorbing layer, and a lower isolation layer. It is superimposed, and the top and bottom layers of the water-absorbing layer are both instant-absorbing layers; in terms of weight percentage, the instant-absorbing layer is made of 50-90% wood pulp fibers mixed with 10-50% adhesive The water-locking layer is made of polymer water-absorbing particles accounting for 15-75% of the weight of the water-absorbing layer; the upper or lower isolation layer is made of ES fiber layer, dust-free paper or non-woven fabric. In this invention, the polymer water-absorbing particles are evenly sprinkled on the first instant absorption layer, and it is difficult to achieve the effect of rapid absorption when the liquid volume is large, and the water retention performance is not ideal, and side leakage is prone to occur. Inconvenience to the user; in addition, during the use of the invention, since the strength of the wood pulp is not strong enough, the user will exert a twisting effect on the sanitary napkin or diaper when the user is active, and the water-absorbent core is easy to agglomerate, break or roll, cause discomfort to the user.
发明内容 Contents of the invention
为了克服现有技术存在的不足，本发明提供了一种不断裂、安全性好、吸水性强、保水性佳的复合吸水芯体及其制备方法。 In order to overcome the deficiencies of the prior art, the invention provides a composite water-absorbing core with no breakage, good safety, strong water absorption and good water retention and a preparation method thereof.
一种复合吸水芯体，包括面层、芯层和底层，所述芯层由下而上顺次包括第一连接层、第一吸水层、增强层、第二吸水层和第二连接层，所述第一吸水层、第二吸水层均由高分子吸水颗粒组成，所述第一连接层中均匀渗有高分子吸水颗粒，所述增强层中也均匀渗有高分子吸水颗粒；所述第一连接层、第二连接层分别由含有粉状热熔胶或ES纤维的木浆纤维组成，所述第一吸水层、第二连接层分别由高分子吸水颗粒组成，所述增强层由长纤维膨松无纺布组成。 A composite water-absorbent core, comprising a surface layer, a core layer and a bottom layer, the core layer sequentially includes a first connecting layer, a first water-absorbing layer, a reinforcing layer, a second water-absorbing layer and a second connecting layer from bottom to top, Both the first water-absorbing layer and the second water-absorbing layer are composed of polymer water-absorbing particles, the first connecting layer is evenly permeated with polymer water-absorbing particles, and the reinforcing layer is also uniformly permeated with polymer water-absorbing particles; The first connection layer and the second connection layer are respectively composed of wood pulp fibers containing powdered hot melt adhesive or ES fiber, the first water-absorbing layer and the second connection layer are respectively composed of polymer water-absorbing particles, and the reinforcing layer is composed of Composed of long-fiber bulky non-woven fabrics.
本发明的第一连接层、第二连接层分别由含有粉状热熔胶或ES纤维的木浆纤维组成，可以在加热后起到整体粘接作用，不用再另外通过胶粘剂进行粘接，不会影响吸水性能，另外，木浆还可以起到增加吸水速度的作用；增强层由长纤维膨松无纺布组成，可以起到锁定高分子吸水颗粒、以及增加拉力的作用，使其制造得到的尿裤尿布等不会断裂。 The first connection layer and the second connection layer of the present invention are respectively composed of wood pulp fibers containing powdery hot melt adhesive or ES fibers, which can play an integral bonding role after heating, and do not need to be bonded by an adhesive in addition, without It will affect the water absorption performance. In addition, wood pulp can also increase the water absorption speed; the reinforcement layer is composed of long-fiber bulky non-woven fabrics, which can lock the polymer water-absorbing particles and increase the pulling force, making it easy to manufacture. The diapers, diapers, etc. will not break.
作为优选，所述复合吸水芯体上设有一条以上由上而下贯通的导流体，所述导流体形状为直线或曲线。液体可沿导流沟快速向芯体两端流动，并迅速扩散到四周，可在短时间内被芯体吸收，不聚集在吸水纸中心，扩大了吸水面积，大大提高了吸水性能和吸水容量。 Preferably, the composite water-absorbent core is provided with more than one guiding body penetrating from top to bottom, and the shape of the guiding body is a straight line or a curve. The liquid can quickly flow to the two ends of the core body along the diversion groove, and quickly spread to the surroundings, and can be absorbed by the core body in a short time without gathering in the center of the absorbent paper, which expands the water absorption area and greatly improves the water absorption performance and water absorption capacity .
作为优选，所述导流体数量为三条，上下两条导流体为直线形且呈水平平行设置，位于上下两条导流体之间的一条导流体为曲线形设置。该结构可以有效增加其导流作用，使液体可以更快得以吸收，提高其吸水性能和吸水容量。 Preferably, the number of the guide bodies is three, the upper and lower two guide bodies are linear and horizontally arranged in parallel, and the one guide body located between the upper and lower two guide bodies is arranged in a curved shape. This structure can effectively increase its diversion effect, so that liquid can be absorbed faster, and its water absorption performance and water absorption capacity are improved.
作为优选，所述长纤维膨松无纺布的纤维长度为52～64mm。纤维长度对于无纺布的强度有很大的影响，本发明在进行试验时发现，在一定范围内，无纺布的拉伸性能会随着纤维长度的增加而增加，但超过一定长度时拉伸性能会下降。 Preferably, the fiber length of the long-fiber bulky non-woven fabric is 52-64 mm. The fiber length has a great influence on the strength of the non-woven fabric. The present invention finds that in a certain range, the tensile properties of the non-woven fabric will increase with the increase of the fiber length, but when the fiber length exceeds a certain length, the tensile properties of the non-woven fabric will increase. Elongation will decrease.
作为优选，所述面层采用无尘纸，底层采用长纤维无纺布。 Preferably, the surface layer is made of dust-free paper, and the bottom layer is made of long-fiber non-woven fabric.
作为优选，所述长纤维无纺布的纤维长度为55～60mm。在进行底层无纺布的选用试验时，同样发现，在一定范围内，无纺布的拉伸性能会随着纤维长度的增加而增加，但超过一定长度时拉伸性能会下降。 Preferably, the fiber length of the long-fiber nonwoven fabric is 55-60 mm. In the selection test of the bottom non-woven fabric, it is also found that within a certain range, the tensile properties of the non-woven fabric will increase with the increase of the fiber length, but the tensile properties will decrease when the length exceeds a certain length.
一种复合吸水芯体的制备方法，包括下述步骤： A method for preparing a composite water-absorbent core, comprising the steps of:
（1）将底层平铺在工作台上，在底层下方设有抽风机及振动器； (1) Spread the bottom layer on the workbench, and set up an exhaust fan and a vibrator under the bottom layer;
（2）在抽风机的作用下，将第一连接层铺设在底层上； (2) Under the action of the exhaust fan, the first connecting layer is laid on the bottom layer;
（3）将第一吸水层铺设在第一连接层上，在抽风机及振动器的作用下，使第一连接层中的部分高分子吸水颗粒均匀渗入第一连接层内； (3) Lay the first water-absorbing layer on the first connecting layer, and under the action of the exhaust fan and the vibrator, make part of the polymer water-absorbing particles in the first connecting layer evenly infiltrate into the first connecting layer;
（4）在抽风机的作用下，将增强层铺设在第一吸水层上； (4) Under the action of the exhaust fan, lay the reinforcing layer on the first water-absorbing layer;
（5）将第二吸水层铺设在增强层上，在抽风机及振动器的作用下，使第二吸水层中的部分高分子吸水颗粒均匀渗入增强层内； (5) Lay the second water-absorbing layer on the reinforcing layer, and under the action of the fan and the vibrator, make part of the polymer water-absorbing particles in the second water-absorbing layer evenly infiltrate into the reinforcing layer;
（6）在抽风机的作用下，将第二连接层铺设在第二吸水层上； (6) Under the action of the exhaust fan, lay the second connecting layer on the second water-absorbing layer;
（7）在抽风机的作用下，将面层铺设在第二连接层上； (7) Under the action of the exhaust fan, lay the surface layer on the second connection layer;
（8）进行加热处理，冷却后收卷、分切，即可得到复合吸水芯体。 (8) Heat treatment, roll up after cooling, and cut to obtain composite water-absorbent core.
作为优选，所述复合吸水芯体上设有一条以上由上而下贯通的导流体。 Preferably, the composite water-absorbent core is provided with more than one guide body penetrating from top to bottom.
作为优选，所述所述面层采用无尘纸，底层采用长纤维无纺布。 Preferably, the surface layer is made of dust-free paper, and the bottom layer is made of long-fiber non-woven fabric.
作为优选，所述长纤维膨松无纺布的纤维长度为52～64mm。 Preferably, the fiber length of the long-fiber bulky non-woven fabric is 52-64 mm.
本发明高分子吸水颗粒不易跑出、安全性好；高分子吸水颗粒一部分均匀渗入第一连接层或增强层，另一部分形成高分子吸水层，可以达到吸水速度快、吸收量大且保水性好的目的，使其保持干爽状态；同时由于增强层的存在，可以增加吸水芯体的强度，在吸入大容量液体时不会由于扭曲作用发生断裂。本发明具有不断裂、安全性好、吸水性强、保水性佳、生产操作简单、成本低等优点。 The polymer water-absorbing particles of the present invention are not easy to run out and have good safety; a part of the polymer water-absorbing particles evenly infiltrates into the first connection layer or reinforcement layer, and the other part forms a polymer water-absorbing layer, which can achieve fast water absorption, large absorption capacity and good water retention The purpose of keeping it dry; at the same time, due to the existence of the reinforcement layer, the strength of the water-absorbing core can be increased, and it will not break due to twisting when absorbing a large-capacity liquid. The invention has the advantages of no fracture, good safety, strong water absorption, good water retention, simple production operation, low cost and the like.
附图说明 Description of drawings
图1是本发明的结构示意图； Fig. 1 is a structural representation of the present invention;
图2是本发明实施例2的结构示意图。 Fig. 2 is a schematic structural diagram of Embodiment 2 of the present invention.
具体实施方式 Detailed ways
下面结合附图和具体实施例对本发明作进一步说明，但本发明的保护范围并不限于此。 The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments, but the protection scope of the present invention is not limited thereto.
实施例1 Example 1
参照图1，一种复合吸水芯体，包括面层7、芯层和底层1，所述芯层由下而上顺次包括第一连接层2、第一吸水层3、增强层4、第二吸水层5和第二连接层6，所述第一吸水层3、第二吸水层5均由高分子吸水颗粒组成，所述第一连接层2中均匀渗有高分子吸水颗粒，所述增强层4中也均匀渗有高分子吸水颗粒；所述第一连接层2、第二连接层6分别由含有粉状热熔胶或ES纤维的木浆纤维组成，所述增强层4由长纤维膨松无纺布组成；所述面层7采用无尘纸，底层1采用长纤维无纺布。 Referring to Fig. 1, a composite water-absorbing core body includes a surface layer 7, a core layer and a bottom layer 1, and the core layer sequentially includes a first connecting layer 2, a first water-absorbing layer 3, a reinforcing layer 4, a first Two water-absorbing layers 5 and the second connecting layer 6, the first water-absorbing layer 3 and the second water-absorbing layer 5 are composed of polymer water-absorbing particles, and the first connecting layer 2 is evenly permeated with polymer water-absorbing particles, the The reinforcing layer 4 is also uniformly infiltrated with polymer water-absorbing particles; the first connecting layer 2 and the second connecting layer 6 are respectively composed of wood pulp fibers containing powdery hot melt adhesive or ES fibers, and the reinforcing layer 4 is made of long Composed of bulky fiber non-woven fabric; the surface layer 7 is made of dust-free paper, and the bottom layer 1 is made of long-fiber non-woven fabric.
本发明的第一连接层2、第二连接层6分别由含有粉状热熔胶或ES纤维的木浆纤维组成，可以在加热后起到整体粘接作用，不用再另外通过胶粘剂进行粘接，不会影响吸水性能，另外，木浆还可以起到增加吸水速度的作用；第一连接层2、增强层4中均有渗有高分子颗粒，可以增加吸水及保水性能，吸收量大，吸水速度快；增强层由长纤维膨松无纺布组成，可以起到锁定高分子吸水颗粒、以及增加拉力的作用，使其制造得到的尿裤尿布等不会断裂。 The first connection layer 2 and the second connection layer 6 of the present invention are respectively composed of wood pulp fibers containing powdery hot melt adhesive or ES fibers, which can play an integral bonding role after heating, and do not need to be bonded by an additional adhesive , will not affect the water absorption performance. In addition, the wood pulp can also increase the water absorption speed; the first connecting layer 2 and the reinforcement layer 4 are infiltrated with polymer particles, which can increase the water absorption and water retention performance, and the absorption capacity is large. The water absorption speed is fast; the reinforcement layer is composed of long-fiber bulky non-woven fabric, which can lock the polymer water-absorbing particles and increase the tensile force, so that the diapers and diapers produced will not break.
所述长纤维膨松无纺布的纤维长度为52～64mm，长纤维无纺布的纤维长度为55～60mm。纤维长度对于无纺布的强度有很大的影响，本发明在进行试验时发现，在一定范围内，无纺布的拉伸性能会随着纤维长度的增加而增加，但超过一定长度时拉伸性能会下降。 The fiber length of the long-fiber bulky non-woven fabric is 52-64 mm, and the fiber length of the long-fiber non-woven fabric is 55-60 mm. The fiber length has a great influence on the strength of the non-woven fabric. The present invention finds that in a certain range, the tensile properties of the non-woven fabric will increase with the increase of the fiber length, but when the fiber length exceeds a certain length, the tensile properties of the non-woven fabric will increase. Elongation will decrease.
一种复合吸水芯体的制备方法，包括下述步骤： A method for preparing a composite water-absorbent core, comprising the steps of:
（1）将底层平铺在工作台上，在底层下方设有抽风机及振动器； (1) Spread the bottom layer on the workbench, and set up an exhaust fan and a vibrator under the bottom layer;
（2）在抽风机的作用下，将第一连接层铺设在底层上； (2) Under the action of the exhaust fan, the first connecting layer is laid on the bottom layer;
（3）将第一吸水层铺设在第一连接层上，在抽风机及振动器的作用下，使第一连接层中的部分高分子吸水颗粒均匀渗入第一连接层内； (3) Lay the first water-absorbing layer on the first connecting layer, and under the action of the exhaust fan and the vibrator, make part of the polymer water-absorbing particles in the first connecting layer evenly infiltrate into the first connecting layer;
（4）在抽风机的作用下，将增强层铺设在第一吸水层上； (4) Under the action of the exhaust fan, lay the reinforcing layer on the first water-absorbing layer;
（5）将第二吸水层铺设在增强层上，在抽风机及振动器的作用下，使第二吸水层中的部分高分子吸水颗粒均匀渗入增强层内； (5) Lay the second water-absorbing layer on the reinforcing layer, and under the action of the fan and the vibrator, make part of the polymer water-absorbing particles in the second water-absorbing layer evenly infiltrate into the reinforcing layer;
（6）在抽风机的作用下，将第二连接层铺设在第二吸水层上； (6) Under the action of the exhaust fan, lay the second connecting layer on the second water-absorbing layer;
（7）在抽风机的作用下，将面层铺设在第二连接层上； (7) Under the action of the exhaust fan, lay the surface layer on the second connection layer;
（8）进行加热处理，冷却后收卷、分切，即可得到复合吸水芯体。 (8) Heat treatment, roll up after cooling, and cut to obtain composite water-absorbent core.
实施例2 Example 2
参照图1，图2，一种复合吸水芯体，包括面层7、芯层和底层1，所述芯层由下而上顺次包括第一连接层2、第一吸水层3、增强层4、第二吸水层5和第二连接层6，所述第一吸水层3、第二吸水层5均由高分子吸水颗粒组成，所述第一连接层2中均匀渗有高分子吸水颗粒，所述增强层4中也均匀渗有高分子吸水颗粒；所述第一连接层2、第二连接层6分别由含有粉状热熔胶或ES纤维的木浆纤维组成，所述增强层4由长纤维膨松无纺布组成；所述面层7采用无尘纸，底层1采用长纤维无纺布。 Referring to Fig. 1 and Fig. 2, a composite water-absorbing core body includes a surface layer 7, a core layer and a bottom layer 1, and the core layer sequentially includes a first connection layer 2, a first water-absorbing layer 3, and a reinforcing layer from bottom to top 4. The second water-absorbing layer 5 and the second connecting layer 6, the first water-absorbing layer 3 and the second water-absorbing layer 5 are composed of polymer water-absorbing particles, and the first connecting layer 2 is evenly permeated with polymer water-absorbing particles , the reinforced layer 4 is also uniformly infiltrated with polymer water-absorbing particles; the first connecting layer 2 and the second connecting layer 6 are respectively composed of wood pulp fibers containing powdery hot melt adhesive or ES fibers, and the reinforcing layer 4 is composed of long-fiber bulky non-woven fabric; the surface layer 7 is made of dust-free paper, and the bottom layer 1 is made of long-fiber non-woven fabric.
本发明的第一连接层2、第二连接层6分别由含有粉状热熔胶或ES纤维的木浆纤维组成，可以在加热后起到整体粘接作用，不用再另外通过胶粘剂进行粘接，不会影响吸水性能，另外，木浆还可以起到增加吸水速度的作用；第一连接层2、增强层4中均有渗有高分子颗粒，可以增加吸水及保水性能，吸收量大，吸水速度快；增强层由长纤维膨松无纺布组成，可以起到锁定高分子吸水颗粒、以及增加拉力的作用，使其制造得到的尿裤尿布等不会断裂。 The first connection layer 2 and the second connection layer 6 of the present invention are respectively composed of wood pulp fibers containing powdery hot melt adhesive or ES fibers, which can play an integral bonding role after heating, and do not need to be bonded by an additional adhesive , will not affect the water absorption performance. In addition, the wood pulp can also increase the water absorption speed; the first connecting layer 2 and the reinforcement layer 4 are infiltrated with polymer particles, which can increase the water absorption and water retention performance, and the absorption capacity is large. The water absorption speed is fast; the reinforcement layer is composed of long-fiber bulky non-woven fabric, which can lock the polymer water-absorbing particles and increase the tensile force, so that the diapers and diapers produced will not break.
所述复合吸水芯体上设有一条以上由上而下贯通的导流体8，所述导流体为直线形或曲线形。液体可沿导流沟快速向芯体两端流动，并迅速扩散到四周，可在短时间内被芯体吸收，不聚集在吸水纸中心，扩大了吸水面积，大大提高了吸水性能和吸水容量。所述导流体数量为三条，上下两条导流体为直线形且呈水平平行设置，位于上下两条导流体之间的一条导流体为曲线形设置。该结构可以进一步增加其导流作用，使液体可以更快得以吸收，提高其吸水性能和吸水容量。 The composite water-absorbing core is provided with more than one guiding body 8 penetrating from top to bottom, and the guiding body is straight or curved. The liquid can quickly flow to both ends of the core body along the diversion groove, and quickly spread to the surroundings, and can be absorbed by the core body in a short time without gathering in the center of the absorbent paper, which expands the water absorption area and greatly improves the water absorption performance and water absorption capacity . The number of the guide bodies is three, the upper and lower two guide bodies are linear and arranged horizontally and parallel, and the one guide body located between the upper and lower two guide bodies is arranged in a curved shape. This structure can further increase its water-guiding effect, so that liquid can be absorbed faster, and its water-absorbing performance and water-absorbing capacity are improved.
所述长纤维膨松无纺布的纤维长度为60mm，长纤维无纺布的纤维长度为58mm。纤维长度对于无纺布的强度有很大的影响，本发明在进行试验时发现，在一定范围内，无纺布的拉伸性能会随着纤维长度的增加而增加，但超过一定长度时拉伸性能会下降。 The fiber length of the long-fiber bulky non-woven fabric is 60 mm, and the fiber length of the long-fiber non-woven fabric is 58 mm. The fiber length has a great influence on the strength of the non-woven fabric. The present invention finds that in a certain range, the tensile properties of the non-woven fabric will increase with the increase of the fiber length, but when the fiber length exceeds a certain length, the tensile properties of the non-woven fabric will increase. Elongation will decrease.
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