WO2000055408A1

WO2000055408A1 - Water-absorption-controlling-function knitting

Info

Publication number: WO2000055408A1
Application number: PCT/JP2000/001137
Authority: WO
Inventors: Junichiro Mune
Original assignee: Sumitomo Corporation; Teijin Limited
Priority date: 1999-03-17
Filing date: 2000-02-28
Publication date: 2000-09-21
Also published as: KR20010111499A; EP1178140A1; AU2694300A; CN1343272A; CA2366005A1

Abstract

A pile structure constituting a front layer forms protruding parts (pile parts) (12) and recessed parts (recesses) (14). A lower layer (30) consisting of a knitted structure having many through holes (34) is provided on the rear surface of an intermediate layer (20) supporting the front layer (10).

Description

Description Water absorption control function Knitting technology

The present invention relates to a knitted fabric having a water absorption control function (a knitted fabric), which is used for nursing diapers and the like, and is intended for a knitted fabric in which functions such as water absorption from a surface, water absorption retention, and backflow prevention are appropriately controlled. Background technology

Among the nursing care products used by the elderly, the sick, and the disabled, disposable diapers have become the mainstream in recent years, especially for nursing care diapers.

However, the increase in the number of users and the single-use disposable cause a huge amount of garbage, which is becoming a major social problem from the viewpoint of environmental conservation. On the other hand, as a nursing diaper that can be used repeatedly many times, conventional diapers have been used recently because excrement remains on the cloth surface, large or small, and gives diaper users discomfort and uncleanness. Not.

In the case of conventional cloth diapers, it can be reused by washing.However, the fabric used does not have a function to remove moisture from the surface, or even if it can be removed once, weight pressure is applied to the fabric. This causes the problem of returning to the surface and losing the dry feel.

In the case of disposable diapers, the use of a high-molecular-weight water-absorbing polymer ensures that once absorbed water does not return to the surface. This is highly evaluated in terms of diaper user's feeling of use and cleanliness. However, disposable diapers using polymer-absorbing bolima have a high selling price and are thrown away after a single use, resulting in a large expense for diaper users and their caregivers. Disclosure of the invention

Purpose of the invention The problem to be solved by the present invention is that, as a material used for nursing care diapers, while having the high moisture transfer performance and the re-movement prevention performance of a disposable diaper, many of them do not decrease An object of the present invention is to provide a water-absorbing control function knitted fabric (knitted fabric) that can be reused by washing multiple times. Summary of the Invention

The water absorption control function knitted fabric (knitted fabric) according to the present invention is a knitted fabric (knitted fabric) having a surface layer formed of a pile structure, and a plurality of convex portions and concave portions are formed by the pile structure. It is characterized by having been done.

The water absorption control function knitted fabric (knitted fabric) according to the present invention is a multilayer knitted fabric (knitted fabric) in which a plurality of knitted tissue layers are laminated, and is composed of a pile structure, and has a large number of pile portions that are convex and brushed. And a surface layer having a cavity-shaped concave portion disposed between the pile portions, an intermediate layer disposed on the back surface of the surface layer to support the pile portion and having a knitting structure denser than the surface layer, and on the back surface of the intermediate layer. And a lower layer composed of a knitted structure having a large number of through-holes.

The fibers constituting the knitted fabric are preferably made of non-water-absorbing fibers. Detailed description of the invention

Hereinafter, the present invention will be described in detail. Knitted fabric is synonymous with knitted fabric.

(Multilayer knit)

A knitted fabric in which a plurality of knitting tissue layers with different structures, such as different knitting structures or the same knitting structure but different thread thicknesses or types, are laminated and integrally knitted.

Adjacent layers have knitted yarns tangled in and out, so each layer does not exist in an isolated and independent state.

The present invention has at least a three-layer structure including a surface layer, an intermediate layer, and a lower layer.

The multilayer knit can be knitted using a warp knitting device having a plurality of 葳. A multilayer knitted fabric can be configured by setting the type and thickness of yarn used for each item, yarn feeding conditions, and knitting structure. (Surface)

The surface layer has a pile structure, and the pile structure has a large number of convex portions and concave portions. In the preferred embodiment, the concave portion is usually a portion having no pile structure, that is, a non-pile structure. Therefore, in this specification, the convex portion is usually referred to as a pile portion. In the present invention, the concave portion is not necessarily a non-pile structure, that is, it is sufficient that the concave portion is lower than the convex portion and presents a concave shape. Therefore, the concave portion is formed by a low pile structure. It can be.

The same structure as that of a normal pile knit is used for the pile structure. In other words, this pile structure is usually formed on the ground structure. However, when the lower layer and the like described below are formed on the back surface of the ground structure to form a multilayer knitted fabric as a whole, the ground structure becomes a multilayer structure. You can see it as the middle layer.

Ring nose and helical thread, in which the yarn protrudes in a ring shape, can be adopted as the nose ring structure. As a basic knitting organization, for example, sharkskin knitting or satin knitting can be adopted. As a more specific knitting structure, a knitting organization represented by (10/34) (10/45) (10/56) (10/67) (10/78) is adopted. it can.

The pile constituting the pile tissue is raised. Brushing improves the feel and drainage. The raising process can be performed by post-processing after the multilayer knit is knitted. The raising process can be performed before the dyeing process.

As a yarn constituting the pile structure, a relatively thick yarn is preferable. Specifically, a yarn of single yarn denier 2.5 to 5.5 can be used, and a yarn of single yarn denier 2.5 to 4.5 is preferably used. The total denier as the yarn can be set to 70 to 250 denier, and is preferably set to i00 to 210 denier. Thick yarns have good moisture permeability and are excellent in dryness and durability after washing. As the surface yarn, a yarn having a single denier larger than that of the intermediate layer and the lower layer is used.

As the material of the yarn, the following hydrophobic fibers (non-water-absorbing fibers) which do not absorb moisture are often used, but may be used by adding a hydrophilic yarn. As the hydrophobic yarn, specifically, a polyester yarn can be used. Polyester yarn has good drying properties after washing. In particular, use strong polyester yarn with increased strength. Thus, durability such as washing resistance can be improved. Other yarn materials include arbitrary synthetic fibers such as polyamide and cotton, and natural fibers.

The pile structure may be composed of a plurality of types of yarns having different thicknesses and materials. The protruding portion (hereinafter referred to as "no") has a pile structure as described above, and a loop-shaped or tufted yarn protrudes to form a protruding shape. When used for diapers, the tip of the pile hits the skin. When used, the pile section is elastically deformed to exert a cushioning effect.

The non-pile structure portion having a concave shape (hereinafter referred to as a concave portion) is arranged between the pile portions and forms a void. Water that contacts the surface moves from the middle layer to the lower layer through the recess. The concave portion also functions as a space that allows elastic deformation of the pile portion.

The water absorption control function knitted fabric according to the present invention is characterized in that it has this concave portion on its surface layer.

The arrangement of the pile portion and the concave portion can be appropriately set according to the application and required performance. When used for cloth diapers and the like, the arrangement and characteristics of the pile portion and the concave portion affect functions such as touch and water absorption.

The pile portions can be arranged in a straight ridge shape, and the groove-shaped concave portions can be arranged between the ridge-shaped via portions. The ridges formed by the piles may be arranged in a curved or bent line. The width of the ridge may be constant, or the width may change continuously or stepwise in the length direction. A plurality of ridges having different widths can be combined. By arranging the pile portions in a lattice shape or a net shape, the concave portion can be arranged in a space surrounded by the pile portions. The pile portions may be arranged in an island shape or a spot shape, and may be arranged in a structure in which the periphery of the pile portion is surrounded by a concave portion.

The pile portion and the concave portion can be arranged at an interval of two every five soils per i 0 cm. Preferably, the number is set to 5 ± 0.5 per 10 (; 111. Here, the case where the pile portion and the concave portion are arranged one by one on the knitted fabric of i 0 cm is counted as i, In the case of only one side, the number is counted as 0.5.The greater the number of piles and recesses per unit length, the better the feel is. If the number of arrangements is too small, water droplets adhering to the surface will It is difficult to fall into the concave side, and the water absorption is reduced.

The area ratio between the pile part and the concave part can be set to pile part: concave part = 1 1: _1 to 7: 5. By changing this ratio, it is possible to adjust the balance between functions such as tactile sensation and dryness by the pile part and functions such as water absorption by the concave part. If the proportion of the pile portion is too small, the skin etc. comes into contact with the intermediate layer at the bottom of the wide concave portion, and the dry feeling is impaired. If the proportion of the concave portions is too small, the water permeability to the intermediate layer side will be poor.

The difference in height between the pile portion and the concave portion, that is, the height of the pile portion, may be the same for all pile portions, or the height may be changed depending on the pile portion. The height of the pile can be the same or it can be partially different. For example, by setting the pile height at the outer edge of the pile to be lower than the center, Moisture and polka dots in contact with the upper surface can smoothly move from the center side to the recess through the lower outer edge, and the pile height of the outer edge is 丄 / 2 to /, preferably 1 compared to the center side. It can be set to Z 2.5-1 / 3.5 In this case, the outer edge portion is usually in a shape that becomes gradually lower toward the end, that is, an inclined shape.

As a means of partially changing the height of the pile part, a high shrinkage yarn is used at a place where it is desired to make it lower than other parts, and a heat treatment or the like that expresses shrinkage after knitting is performed, so that the height of the pile at the corresponding place is increased. Can be reduced. High shrinkage polyester yarn can be used as the high shrinkage yarn. In particular, highly shrinkable yarns having a boiling water shrinkage of 25 to 70% are preferred. High shrinkage yarns with a boiling water shrinkage of 40 to 60% are more desirable.

The pile portion can be subjected to a water repellent prevention process. The water repellent prevention treatment improves the passage of moisture to the intermediate layer and the lower layer by treating the yarn or fiber constituting the pile portion so that it is difficult to repel water. It is not a process that changes the water absorption of the yarn material itself. The water-repellent treatment is also useful for the intermediate layer and the lower layer, and the whole knitted fabric after the knitting can be subjected to the water-repellent treatment. A so-called antistatic water-absorbing process can be used as a water-repellent prevention. Antistatic water absorption reduces the chargeability of the fibers, and the reduced chargeability makes it easier for water to pass between the fibers, increasing the water absorption of the knitted fabric structure. Water repellent treatment is performed by applying a water repellent or antistatic water absorbent made of various synthetic resins to the vial.

— A— Coating, coating or attaching to

(Intermediate layer)

This structure supports the pile structure of the surface layer. Allow water to pass smoothly from the surface to the lower layer. Those having a function of suppressing the backflow of water from the lower layer side to the surface layer side are preferable.

The same knitting structure as the support structure in the ordinary pile knitted fabric can be adopted. For example, sharkskin, satin, and atlas. Even with the same knitting structure as the surface layer, the knitting structure can be made dense by changing the yarn used.

As the yarn constituting the intermediate layer, a yarn of the same material as the surface layer can be used. For example, polyester yarn can be used. The thickness of the yarn can be 50 to 250 denier, preferably 50 to 15 ° denier. The use of textured yarn has the advantage that the density between single fibers increases, and the effect of the water-repellent prevention process is unlikely to be lost even after repeated washing. The single-layer denier of the middle layer should be thinner than the surface layer.

Set the yarn density of the intermediate layer, especially the part corresponding to the concave part of the surface layer, that is, the part exposed on the surface side, to the course 36 to 80 / inch and the bore 36 to 80 inch in finishing dimensions. Things come. This yarn density should be higher than the surface yarn density. By adopting an appropriate yarn density, the water present in the recesses on the surface layer is efficiently sucked in by the capillary action between the yarns and fibers in the intermediate layer and transferred to the lower layer side. In addition, the water that has migrated to the lower layer is prevented from migrating to the surface by the fiber structure of the intermediate layer.

By increasing the single fiber density of the intermediate layer, the above-described effect of the water-repellent treatment can be effectively maintained for a long period of time. If the density of single fibers in the middle layer is higher than the density of single fibers in the surface layer, backflow of moisture from the middle layer to the surface layer is unlikely to occur. Even if washing is repeated many times, the processing effect does not deteriorate, and the performance of moisture transfer from the surface layer to the middle layer is maintained. By adjusting the number of thread removal portions of the intermediate layer, particularly the portions corresponding to the concave portions of the surface layer, that is, the portions exposed on the surface side, it is possible to suitably prevent solid matter such as stool from entering the knitted fabric. . Once such solid matter enters the knit, it cannot be easily removed by washing. The number of thread removal is preferably 4 or less, more preferably 2 to 3, and particularly preferably 2. 〔Underlayer〕

In the water absorption control function netting according to the present invention, this lower layer is not essential. In short, the presence of the pile portion and the concave portion on the surface layer achieves the desired purpose and achieves the desired effects. However, the presence of this lower layer greatly improves the water absorption performance, such as the water retention capacity of the entire knitted fabric.

As the lower knitting organization, various knitting organizations can be adopted as long as the knitting organization has a through-hole. For example, Atlas Net can be adopted. Irregularities are formed on the back surface of the knitted fabric on which the lower layer having the through-holes is disposed.

As the yarn constituting the lower layer, the same yarn as the intermediate layer can be used. For example, polyester yarn is used. The thickness of the yarn may be 50 to 250 denier, preferably 50 to 150 denier.

By having the through-holes, elastic deformability is exhibited and cushioning during use is enhanced. In addition, the through holes enhance the water transfer from the intermediate layer. It also has the function of retaining water in the through holes to increase water retention. Water absorption control function When a water-absorbing pad or the like is used under the knitted fabric, the space between the water-absorbing pad and the intermediate layer or the formation of an air layer allows water to flow to the intermediate layer side. To prevent backflow.

The shape of the through-hole can be changed depending on the knitting structure. For example, the diamond-shaped through-holes can be arranged in a zigzag manner in front, back, left and right by atlas netting. In addition, it is also possible to use a through hole having a tortoiseshell shape, a rectangular shape, a circular shape and other shapes.

In the lower layer, the yarn density of at least a portion close to the intermediate layer can be higher than the yarn density of the intermediate layer. In this way, the moisture in the intermediate layer is efficiently transferred to the lower layer side by the capillary action due to the difference in fiber density.

[Application]

The water absorption control function knitted fabric of the present invention can be used for various applications requiring functions such as water absorption, water retention, and backflow prevention.

Specifically, it can be used as a part of the nursing diaper that touches the skin. In this case, the surface layer having the pile portion is arranged on the side that touches the skin. On the back of the lower layer, there can be placed a water-absorbing body made of cotton-like water-absorbing non-woven fabric, cotton knitted fabric, etc. On the back of the water-absorbing body, a cloth that blocks water flow, etc. Can be arranged. It can also be applied to bath mat fabric and bed fabric. It can also be applied to various types of clothing and daily necessities that are prone to getting wet or sweat. BRIEF DESCRIPTION OF THE FIGURES

FIG. 1 is a schematic perspective view of a water absorption control function knitted fabric representing an embodiment of the present invention. FIG. 2 is a schematic sectional view. FIG. 3 is a schematic bottom view. FIG. 4 is a schematic cross-sectional view showing the structure of the pile portion before (a) and after (b) the shrinking process. FIG. 5 is a cross-sectional view of a state in which the nursing diaper is used.

In Figs. 1 to 5, 10 surface layer, 12 pile part (protruding part), 14-concave part (concave part), 20 intermediate layer, 30 lower layer, 32 straight band, 34 It is a through hole. BEST MODE FOR CARRYING OUT THE INVENTION

(Schematic structure)

The embodiment shown in FIGS. 1 to 3 shows a schematic structure of a water absorption control function knitted fabric. The knitted fabric F is composed of three types of structural parts, a surface layer 10, an intermediate layer 20, and a lower layer 30, all knitted using polyester yarn. The middle layer 20 is composed of upper and lower two layers 22, and the entire knitted fabric has a four-layer structure.

The surface layer 10 includes a plurality of ring piles arranged side by side, a pile portion 12 having a large number of linear ridges, and a concave portion 14 formed of a void-like groove arranged in the middle of the pile portion 12. , Are arranged alternately.

The intermediate layer 20 having a two-layer structure is a substantially uniform knitted fabric as a whole, and supports the pile portion 12 of the surface layer 10. In the concave portion 14 of the surface layer 10, the intermediate layer 20 is exposed on the surface.

As shown in detail in FIG. 3, the lower layer 30 has a lattice structure composed of oblique linear lines 32 intersecting each other. At the center of the lattice structure, a diamond-shaped through hole 34 is formed. At the location of the through-hole portion 3, the intermediate layer 20 is exposed on the lower surface side. There is a portion where the through-hole portion 34 of the lower layer 30 and the concave portion 4 of the surface layer 10 face each other on both sides of the intermediate layer 20. The above-described knitted structure schematically represents each layer, and in an actual knitted fabric, the yarns constituting each layer are entangled or knitted with the yarns of the adjacent layer, and are mixed and integrated. .

FIG. 4 shows a detailed structure of the pile portion 12 and a method of manufacturing the same.

As shown in FIG. 4 (a), the pile portion 12 in the knitted state has a large number of yarns projecting in a ring shape from the intermediate layer 20, and the height of each ring pile is the same. However, the yarn 16 of the ring pile, which constitutes both sides of the thread portion 12, has a high shrinkage that is high in shrinkage compared to the yarns constituting the other ring no. Thread is used. As shown in Fig. 4 (b), when the knitted fabric after the knitting is heat-treated, the ring pile i6 made of highly shrinkable yarn shrinks more than other ring piles, and its height becomes much lower. I will. The overall shape of the pile portion 12 is such that there are steps on the left and right side edges or a trapezoidal shape.

As described above, when water comes into contact with the surface of the pile portion i 2 in which only the outer edge is lowered, water or water droplets easily fall into the concave portion 14 from the ring pile 16 of the high-shrinkable yarn that is lowered. It will be efficiently fed into the middle layer 20. Also, the corners of the pile portion 12 are cut at the side edges, so that the feel is improved.

[Care diapers]

The embodiment shown in FIG. 5 is a case where the water absorption control function knitted fabric having the above structure is used for a nursing diaper.

The water absorption control function knitted fabric F has the same structure as the above-described embodiment.

This knitted fabric F is used for the part of the nursing diaper that is to be touched with the skin, and a water-absorbing pad 40 is placed on the back of the knitted fabric F. The back of the water-absorbing pad 40 has a water-blocking backing. Fabric 50 is arranged. The water-absorbing pad 40 has a structure in which a fiber aggregate having a structure in which cotton yarn is loosened is accommodated in a bag of cotton fabric. Using these materials, nursing diapers can be manufactured through ordinary cutting or sewing.

In use, the top of the pile portion 12 of the surface layer 10 hits the skin. The brushed pile section 1 2 has a good touch and elastic cushioning. The lower layer 30 having the through-holes 3 4 also contributes to enhancing elastic cushioning.

When water such as urine comes into contact with the surface, water flows from the side of the pile 11 to the recess 14. Alternatively, water drops fall, are sucked into the middle layer 20, and are quickly absorbed from the through holes 34 of the lower layer 30 to the water absorbing pad 4 °. No ,. No water droplets remain on the surfaces of the ridges 12, giving the skin a dry feel. Even if external force is applied to the nursing diaper due to the weight of the user and water oozes out of the water absorbing pad 40, the lower layer 30 has a hole between the surface of the water absorbing pad 40 and the middle layer 20. Since there is an interval formed by the portions 34 and the air layer is formed, it is possible to prevent water from seeping out from the intermediate layer 20 to the surface side. The intermediate layer 20 has a relatively high yarn density, and cannot easily pass through if it is water that has oozed out. In addition, since water that has oozed from the water absorbing pad 40 can be stored in the through hole 4 in the lower layer 3 ◦, the water is less likely to leak to the surface side by this action.

The knitted fabric F and the water-absorbing pad 40 constituting the nursing diaper are washable. The knitted fabric F knitted with polyester yarn has excellent washing resistance, is not damaged by frequent washing like nursing diapers, and dries quickly after washing. Example

The results of specifically knitting the woven fabrics of Examples and Comparative Examples of the present invention and evaluating the performance thereof are shown.

(Example 1)

A warp knitting machine (4-bar structure) was used. The used yarn and knitting structure for each Prov are shown.

Use Yarn>

Front: Polyester yarn 100 D—24 F (4.2 single yarn denier)

"Polyester strong yarn made by Teijin Limited.

Tensile strength [DRY TENACI TY] 7.0 ± 0.7 g / DE

Elongation [DRY ELONGATION] 16.0 ± 4.2%

Shrinkage [SHRINKAGE] 6.7 ± 1.2%

Oil adhesion rate [OIL CONTENT] 0.50 ± 0.25% "

= J Les 2 Polyester thread 50 D — 24 F

MIDNORE 1 Polyester thread 1 5 0 D 4 8 F

Back polyester yarn i 5 ◦ D— 4 8 F

1 ϋ one <Knitting organization>

Front: Sharkskin (10/56), Ring pile

Middle 2: Sharkskin (10/12)

Middle ：: Atlas Net (54/43/34/32/23/21)

• 1 2/1 0-0 1/1 2-2 1/2 3-3 2/3 4

• 4 3/4 5)

Back: Atlas Net (0 1 / I 2 ■ 2 1/2 3 · 3 2 3 4

• 3 5 · 5 4 4 3 · 3/3 2 · 2 3 2 1

• 1 2/10)

The front layer corresponds to the surface layer, the middle layer corresponds to the middle layer, the middle layer corresponds to the lower layer. However, since the knitting organization of each 葳 constitutes a multi-layer knitted fabric that is entangled with each other, one layer is not independently knitted by only one prize. Will form a layer.

The total number of piles and recesses per 10 cm in the surface layer was variously changed as shown in Table 1 below. Note that the total number of arrangements in Table 1 corresponds to the total number of arrangements / 2 = the arrangement interval when represented by the arrangement intervals described above. At a position corresponding to the concave portion of the intermediate layer, the number of threading was adjusted between 5 and 7 to produce.

【table 1】

Roller type 5 A B C D E F Pile + recess

16.5 14.0 12.0 11.5 11.0 10.0 Machining after knitting>

After pile brushing treatment, water repellent treatment with a water repellent was performed.

Evaluation test>

A nursing diaper having the structure shown in Fig. 5 was manufactured, and was repeatedly used and washed. Evaluation results>

Having a surface layer composed of a pile part and a concave part, after washing 30 times or more However, when used in contact with water during use, no water droplets remained on the surface and a dry feel was obtained

. Of the prototypes A to F described above, prototype D had the best performance. The thick yarn of single-layer denier on the surface layer knitted by the front prize makes the pile elastic. The polyester yarn used for Middle Pro 1 and Back II enhances the water retention effect in the lower layer. The middle layer formed by middle # 2 shows the function of connecting the surface layer and the lower layer.

The water-repellent treatment has the effect of forming water droplets in the pile portion and improving the permeability of each layer. However, when the use and washing are repeated, the function of the water-repellent treatment is reduced on the fabric surface. However, in this embodiment, even if a water droplet is formed in the pile portion, the water droplet falls into the concave portion, so that even if the effect of the water repellent prevention processing is reduced, the problem is reduced. Further, the effect of the water-repellent prevention processing on the intermediate layer and the lower layer which are not exposed on the surface of the knitted fabric is hard to be weakened, so that the water can pass well. It is considered that the high single fiber density of the middle layer and the lower layer is also effective for maintaining the effect of the water-repellent prevention processing.

(Example 2)

In the prototype D of Example 1, the number of thread removal at a portion corresponding to the concave portion of the intermediate layer was changed to two or three. Other conditions were the same as in Example 1.

Prototypes D a (with 2 thread removers) and prototypes D b (with 3 thread removers) were manufactured.

The results of the performance evaluation show that in the case of Example 1, the solid matter such as stool attached to the surface of the nursing care diaper penetrated from the concave part of the surface layer to the water-absorbing pad side through the intermediate layer, and washes. In contrast, in Example 2, invasion of solid matter such as stool could be successfully prevented. In particular, prototype I) a gave better results.

For the prototype D a, when the finished course number was measured, the course was 36 and the bore was 36.

Since the function of preventing solids from entering is a function of the structure of the knitted structure, the effect was not reduced even after repeated washing.

(Example 3) W In the prototype Da of Example 2, a high shrinkage polyester yarn having a boiling water shrinkage of 53.2% was used as a yarn to be supplied to both side edges of the pile portion during knitting. The other conditions were the same as in Example 1.

After knitting, a hot water treatment was performed to sufficiently shrink the highly shrinkable polyester yarn. The pile portion of the obtained knitted fabric had a step with the outer edge portion using the high shrinkage yarn being about 1/3 as high as the other portions.

When the performance was evaluated, it was confirmed that water droplets adhering to the surface of the pile part dropped into the concave part very quickly through the step, and were quickly absorbed from the intermediate layer to the water-absorbing pad by capillary action. Was. In addition, washing durability has been improved, and practicality has been further enhanced.

[Comparative Example 1)

A two-layer knitted fabric was manufactured.

Knit the satin using polyester 75D-35F for the front (surface layer) and Bemberg 50D-38F for the knocking (lower layer). Various pile organizations were organized. Therefore, there is no distinction between piles and recesses on the surface.

Water repellent prevention processing was performed on the surface layer side. After the dyeing step, the pile tissue was raised.

When the performance was evaluated by absorbing the produced knitted fabric, the water absorption was good to some extent, but the pile raising property was not good, and the pile was not elastic. Touching the surface after water absorption made it feel wet.

(Comparative Example 2)

A four-layer knitted fabric was manufactured.

Front: A uniform pile structure was knitted by sharkskin knitting using polyester 125D-24F. The pile portion was subjected to the same brushing treatment and water repellent prevention treatment as in Comparative Example 1.

Middle 2: Knitted with Sharkskin using polyester 0D-24F.

Middle 1: Polyester 150 D — 48 F Knitted.

No s'-kick: Knitted by Atlas net using polyester 15 ° D-48F processed yarn.

As a result of evaluation of the performance, the water absorption, dry feel, pile raising, etc. were able to exhibit some performance, but the texture on the surface side was slightly hard.

(Comparative Example 3)

For comparison with Comparative Example 1, the knitted fabric has a two-layer structure, and the surface (front) yarn is the same as that of Comparative Example 1 with polyester 125 D—24 F, and the lower layer (back) is polyester 5 0 D—24 F was used. Pile brushing and water repellent treatment were also applied. The results of the performance evaluation showed that the water absorption and pile raising were good to some extent, but there was a feeling of wetting when the surface was pressed after water absorption.

(Comparative Example 4)

In Comparative Example 2, polyester 100 D—24 F was used for the surface layer. In addition, the napping treatment was performed not before but after the dyeing process. This is because brushing treatment after dyeing shows that the brushing agent remains on the fabric, which reduces the effect of water repellent treatment. If the napping treatment is performed before dyeing, the napping agent is removed during the dyeing process, and it is difficult to adversely affect the water-repellent treatment. The other conditions were the same as in Comparative Example 2.

As a result of the performance evaluation, the water absorption and pile raising were the same as in Comparative Example 3, but the texture of the surface layer was softer and the dry feel was improved as compared with Comparative Example 3.

Using the knitted fabric of Comparative Example 4, a diaper for nursing care similar to that of Example 1 was manufactured, and its durability was tested by actually using it.

Test results with a linen supplier showed that the function was good up to 10 washes, but after that, water droplets remained on the surface and the usability deteriorated. This is because water droplets are formed on the pile due to the surface tension of water attached to the surface of the diaper, and water does not transfer to the layer below the pile. If the water repellent treatment is applied, the water droplets are hardly formed and the water easily moves to the lower layer.However, if the washing is repeated, the effect of the water repellent treatment is lost. It is believed that there is.

[Performance comparison table] The production conditions and performance evaluation results of the above Examples and Comparative Examples are shown in Tables 2 to 4 below. Example 1 is the data of prototype D, and Example 2 is the data of prototype D a. Table 4 shows the detailed data of the washing durability test of Examples 1 to 3 and Comparative Example 4. In the washing durability test, the water absorption after washing was measured in accordance with JIS standard L-118-A (second) and JIS standard L-118-B (mm). [Table 2] Example 1 Example 2 Example 3

4 4 4

Use thread:

Front 100D-24F 100D-24F 100D-24F

Middle 2 50D-24F 50D-24F 50D-24F

Middle 1 1 0 D-48Ftex 150D-48Ftex 150D-48F tex

Bus 150D-48Ftex 150D-48Ftex 150D-48Ftex

Surface unevenness Unevenness Unevenness Unevenness

Pile step None None None

Brushing time Before dyeing Before dyeing Before dyeing Dry feel 〇〇〇

Pile raising 〇〇〇

Water absorption 〇〇〇

Surface texture 〇〇〇

Backflow prevention effect 〇〇〇

Washing durability 30 times 40 times> 50 times

Prevention of solid matter penetration X 〇〇

[Table 3] Comparative Example 1 Comparative Example 2 Comparative Example 3 Comparative Example 4

4 4 Thread used:

Front 75D-36F 125D-24F 125D-24F 100D-24F Middle 1 50D-24F 50D-24F Middle 1 150D-48Ftex 150D-48Ftex Back 50D-38F 150D-48Ftex 50D-24Ftex 1 0D-48Ftex Bemberg

Surface unevenness Flat Flat Flat Flat Pile step No No No No No Brushing time After dyeing After dyeing After dyeing Before dyeing Dry touch 〇〇 X 〇 Pile brushing X 〇〇〇吸 Water absorption 〇〇〇〇 Surface texture XXX 〇 Backflow prevention effect X 〇 X 洗濯 Washing durability XXX 10 times Solid matter permeation prevention XXXX

-I-

28/501 I / O 081/081 05 "-Ί

0/0 0/081 like 0 / 08K 0/081 like (39S) 05- -Ί

96 / I OCI / ΟίΊ OSI / O ^ I 081/081 (hidden) 0 -1

0/0 0/0 0/0 0 Thin (03S) 0 -Ί

66 / ZEI 591/581 591/581 081/081 (UllU) οε- -τ

0/0 0/0 0/0 0/0 (D3S) οε- -Ί I / OS I 6EI / C9I 6CI / Z9i 081/081 (related) οζ- -Ί

0/0 0/0 0/0 0/0 (39S) QZ- -Ί

081/081 ZZI / 08I (IUU1) 01- -Ί

0/0 0/0 0/0 0/0 (39S) 01- .Ί m

P occlusion ε \ m ί \ mm

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LZllO / OOdT / lDd 80 ^ 55/00 O Industrial applicability

The water absorption control function knitted fabric according to the present invention, when used in a nursing diaper or the like, smoothly drops water that has come into contact with the surface layer from the pile portion into the concave portion, and quickly absorbs the water into the intermediate layer. It can be sent to the back side. A dry feel can be given to the skin that comes into contact with the pile part of the surface layer, and the feeling of wearing is excellent. Water absorption function does not decrease even after repeated washing. It does not allow solids other than water to pass, making it easy to wash and highly reusable.

Claims

The scope of the claims

1. A woven fabric having a surface layer formed of a pile structure, wherein the pile structure has a large number of convex portions and concave portions formed therein.

2. The water absorption control function knit according to claim 1, wherein the concave portion has a non-pile structure.

3. The knitted fabric for controlling water absorption according to claim 1, wherein the pile structure is knitted with a polyester high-strength yarn having a single denier of 3.5 or more and a total denier of 100 or more.

4. The water absorption control function knitted fabric according to any one of claims 1 to 3, wherein the convex portion and the concave portion are arranged at a rate of 2 per 5 cm per 5 cm.

5. The area ratio between the convex part and the concave part is: convex part: concave part = 1 1: 1 to 7: 5, any one of claims 1 to 4. The water absorption control function knitted fabric described in.

6. The water absorption control function knitted fabric according to any one of claims 1 to 5, wherein an edge shape of the convex portion is inclined so as to become lower toward the end.

7. The water absorption control according to any one of claims 1 to 6, wherein a lower layer composed of a knitted structure having a large number of through-holes is arranged on the back surface of the intermediate layer supporting the pile structure to form a multilayer structure. Functional knitting.

8. The water absorption control function knit according to claim 7, wherein the knitting structure of the lower layer is denser than the knitting structure of the middle layer.

9. The yarn density of a portion corresponding to the concave portion of the surface layer in the intermediate layer is a finishing course of 36 to 80Z inches and a gap of 36 to 80 / inch. 8. The water absorption control function knitted fabric according to 8.

10. The water absorption control function knitted fabric according to any one of claims 7 to 9, wherein the knitting of a portion corresponding to a concave portion of the surface layer in the intermediate layer has a number of yarns of 4 or less. .

1 1-a multilayer knitted fabric in which a plurality of knitting tissue layers are laminated,

It is composed of a pile structure and is placed between many piles that are convex and between piles Surface layer having a concave portion formed,

An intermediate layer arranged on the back of the surface layer to support the pile portion,

A water-absorbing control function knitted fabric, comprising: a lower layer comprising a knitted structure having a number of through-holes disposed on a back surface of the intermediate layer.

12. The water absorption control function knitted fabric according to claim 11, wherein the pile portion of the surface layer is knitted with polyester high-strength yarns having a denier of 3.5 or more and a total denier of i0 ° or more.

13. The water absorption control function knitted fabric according to claim 1i or 12, wherein the pile portion and the concave portion of the surface layer are arranged at 5 ± 2 pieces per 10 cm.

14. The water absorption control function knitted fabric according to claim 11, wherein an area ratio between the pile portion and the concave portion of the surface layer is pile portion: concave portion = 1 1: 1 to 7: 5.

15. The yarn density of the intermediate layer in the concave portion of the surface layer is a finishing course of 36 to 80 / inch and a gap of 36 to 80 / inch, according to any one of claims 11 to 14. Knitted fabric with water absorption control function.

16. The water absorption control function knitted fabric according to any one of claims 11 to 15, wherein a pile portion of the surface layer has a pile height at an outer edge portion lower than a center side.

17. The water absorption control function knit according to any one of claims 11 to 16, wherein the knitting structure of the intermediate layer is denser than the knitting structure of the surface layer.

18. The water absorption control function knit according to any one of claims 11 to 16, wherein the knitting structure of the lower layer is denser than the knitting structure of the intermediate layer.

<9> The water absorption control function knitted fabric according to any one of <1> to <18>, wherein the fibers constituting the knitted structure are hydrophobic fibers.

20. The water absorption control function knitted fabric according to any one of 1 to 19, which has been subjected to a water repellent prevention treatment.