JP4487511B2 - Knitted fabric and laminated sheet for shoe interior - Google Patents

Description

  The present invention relates to a knitted fabric for interior of shoes suitable for lining and insoles of shoes such as shoes for casual ladies, running shoes, and boots.

  Conventionally, materials used for lining and insoles of shoe interiors include fabrics that are knitted and woven using synthetic fibers such as polyester and nylon, or blended yarns of synthetic fibers and natural fibers such as cotton. Many have been proposed.

  Recently, as a lining material for shoes, a material that absorbs and wicks sweat is required, and a lining material obtained by needle punching ultrafine fibers having fine holes in a flexible polyurethane foam sheet (see, for example, Patent Document 1), A lining material in which a hygroscopic exothermic material is inserted between the outer material and the lining (see, for example, Patent Document 2), a composite fiber material obtained by needle punching natural fibers and fibers having a moisture diffusibility such as a cross-shaped or L-shaped fiber cross section (for example, Patent Document 3), and a laminated sheet such as a shoe lining material (see, for example, Patent Document 4) in which a mixed fiber sheet made of sodium polyacrylate and a deodorized fiber is covered with a nonwoven fabric as a core layer has been proposed. .

However, the above-described conventional lining material seems to have focused on the extent of eliminating the stuffiness in the shoes due to walking. Therefore, a lot of sweating due to severe conditions such as marathon, etc. for a long time, rain in bad weather, water play on the seaside or riverside, work in wet areas, etc. When water enters, a sticky feeling may be felt, and higher performance is required.
Japanese Patent Publication No. 63-7148 Japanese Patent Publication No. 7-59762 JP-A-9-75110 JP-A-8-118524

  The present invention has an unprecedented water-absorbing and water-holding property, and can eliminate or reduce the sticky feeling caused by water intruding into the shoe, and has an excellent dry feeling (smooth feeling). It is an object to provide a knitted fabric for interior and a laminated sheet.

The configuration of the present invention for solving the above-described problems is as follows. That is, the present invention is a pile knitted fabric having a pile knitted using a circular knitting machine and a knitted fabric body, and the knitted fabric body is a state in which polyester false twisted yarn and cotton combed yarn are aligned. The pile is formed only of the false twisted yarn , and 30% by mass or more of the entire pile knitted fabric is cotton combed yarn, and is applied so that the pile is in contact with the skin. The present invention relates to a knitted fabric for interiors of shoes. For convenience, the pile side is referred to as the front surface of the pile knitted fabric, and the knitted fabric body side is referred to as the back surface of the pile knitted fabric.

Water shoe interior knit fabric of the present invention, a polyester false twisted yarn that forms the pile of the surface, by the action of the cotton combed yarn forming the rear surface of the knitted fabric body, with excellent unprecedented It has water retention and surface dryness, and can be used suitably for shoe interior applications that require water absorption and water retention beyond simple hygroscopicity. In particular, it is optimal as a material for shoe insoles and shoe linings, and a comfortable feeling can be obtained. Further, by appropriately designing the pile height, the pile cushioning effect can be exhibited and the friction durability can be improved.

  Hereinafter, the present invention will be described in detail.

The shoe interior knitted fabric of the present invention (hereinafter sometimes abbreviated as the main knitted fabric) has a pile made of polyester false twisted yarn composed of hydrophobic fibers on the surface of the knitted fabric, and this pile is formed as a convex portion. An uneven structure is formed on the surface. The knitted fabric of the present invention has a surface uneven structure (hereinafter sometimes abbreviated as surface uneven structure) due to this pile, and in part, liquid moisture brought from the outside to the surface of the knitted fabric. However, the effect of promptly entering the inside of the knitted fabric and promoting the movement to the back surface side can be achieved. In addition, since the surface side is used as a surface on the side touching the foot skin, the substantial contact area between the knitted surface and the foot skin is reduced because of the surface uneven structure, so that the feeling of stickiness due to moisture is reduced. Since the air permeability in the surface direction on the surface of the knitted fabric is reduced, the effect of improving the dry feeling can also be achieved.

Therefore, the surface pile is formed using a polyester false twisted yarn composed of hydrophobic fibers in order to obtain a good dry feeling. Examples of hydrophobic fibers include polyester fibers made of polyester polymers such as polyethylene terephthalate, polymethylene terephthalate, polybutylene terephthalate, polyoxyethoxybenzoate, polyethylene naphthalate, and cyclohexanedimethylene terephthalate, and isophthalic acid to these polyester polymers . Examples thereof include polyester fibers comprising a copolymerized polyester obtained by copolymerizing a third glycol component such as a sulfoisophthalic acid component, propylene glycol, butylene glycol, cyclohexane dimethanol, and diethylene glycol. Furthermore, biodegradable synthetic fibers made of aliphatic polyester polymers such as polycaprolactone, polybutylene succinate, polylactic acid, and the like can be mentioned. When such biodegradable synthetic fibers are used, Can be allowed to stand for a long time or treated with compost and decomposed by the action of microorganisms, etc., so that the environmental load at the time of disposal after use is further reduced.

The raster of the hydrophobic fibers is not particularly limited, and any of bright, semidal, and fulldal may be used. Further, antimicrobial hydrophobic fibers, antifouling properties, may be used a functional hydrophobic fibers hygroscopicity.

When forming a pile on the surface, the yarn composed of the above-described hydrophobic fibers is used to knit a knitted fabric structure having a pile. As the yarn at this time, water absorption, soft feeling, From the viewpoint of improving the dry feeling, a yarn having voids between fibers is used . As such a yarn , in the present invention, a false twisted yarn having an appropriate stretchability and having a heat retaining effect is used .

  The distribution form of the piles on the surface is not particularly limited. For example, the piles may be uniformly scattered as shown in FIG. 1 and distributed in stripes or lattices as shown in FIG. Alternatively, the surface of a desired form may be formed by knitting with a known pile structure.

The pile density on the surface, that is, the number of piles per unit area is preferably 20 pieces / cm ² or more, more preferably about 30 to 100 pieces / cm ² , thereby making the surface particularly dry. Can do.

As a distribution form of the piles on the surface, for example, as shown in FIG. 3, a form in which piles are present in a relatively dense area and areas in which no piles are present is preferable. At this time, the pile density in an area where piles exist relatively densely (sometimes abbreviated as pile dense area) is preferably 20 pieces / cm ² or more, and more preferably about 30 to 150 pieces / cm ² . By having such a pile-concentrated area and an area where no pile exists unevenly, there is an advantage that drainage is facilitated by using an area where no pile exists as a passage. In this preferred embodiment, the interval between adjacent pile dense areas is preferably about 0.1 to 2.0 mm. If the interval is too wide, the proportion of the portion where the pile does not exist increases, so that the dry feeling of the surface may be impaired. Conversely, if the interval is too narrow, the meaning of the unevenly distributed structure is reduced. The interval is preferable. For the same reason, the area ratio between the pile dense area and the area where no pile is present is preferably about 3/1 to 50/1 (molecules are the ratio of the pile dense area). As the area per one pile dense zone, preferably 2 mm ² 100 mm ² approximately.

  In FIG. 3, the pile dense area is illustrated as having a rectangular shape. However, the present invention is not limited to this, and may be any shape such as a polygon such as a triangle or a hexagon, a circle, an ellipse, a cloud, or the like. Good.

On the other hand, on the back side of the main knitted fabric , a knitted fabric is knitted using cotton combed yarn composed of hydrophilic fibers. This is because moisture that has moved from the surface side is absorbed and retained by hydrophilic fibers. Cotton is used as the hydrophilic fiber . As the mass of the hydrophilic fiber used for knitting the back knitted fabric, it is necessary to occupy 30% or more of the total mass of the knitted fabric, that is, the total fiber mass, and depending on the use, 40% or more, Furthermore, it is preferable to occupy 50% or more. When the proportion of the hydrophilic fiber is less than 30%, the knitted fabric is inferior in water absorption, water retention and moisture absorption, and is not suitable for the present invention.

  The main knitted fabric only needs to be configured to have the above-described front and back surfaces, and the other configurations are not particularly limited.

In addition, the pile constituting the surface of the main knitted fabric is preferably knitted with false twisted yarn obtained by false twisting a multifilament yarn from the viewpoint of promoting moisture diffusion movement by capillary action , It is more preferable that the multifilament yarns of different fineness are knitted with false twisted yarns . From the same point of view, the cross-section of the fibers constituting the multifilament yarn is preferably a fiber having a modified cross-section. It is particularly preferable to use a false twisted yarn obtained by performing false twist processing on a multifilament yarn having a different shape and different cross-section.

  In order to promote the movement and diffusion of moisture by capillary action, it is also preferable to use a fiber having a small single yarn fineness, and specifically, to use a fiber having a single yarn fineness of 5 dtex or less. On the surface of the knitted fabric, it is preferable to use a single yarn fineness of 5 dtex or less from the viewpoint of soft touch and fit.

The thickness of the main knitted fabric is not particularly limited and may be appropriately set depending on the purpose. From the viewpoint of maintaining a good dry feeling on the surface, the pile height on the surface may be 0.5 mm or more. Preferably, 0.5 to 3.0 mm is more preferable. Further, the thickness of the layer containing the cotton combed yarn on the back side is preferably limited to less than 50% of the total thickness of the main knitted fabric .

  Here, it is preferable that the pile height is 0.5 mm or more because not only the viewpoint of dry feeling on the surface but also the pile effectively acts on the problem of friction when wearing shoes. It is because what the present inventors discovered. That is, when wearing shoes, friction with bare feet or feet wearing socks may cause the interior materials of shoes or socks to break easily, but the pile height on the surface of the main knitted fabric should be 0.5 mm or more. This is because cushioning is obtained and friction is greatly reduced.

  This knitted fabric not only absorbs water, but also absorbs water on the back side once it has permeated into the knitted fabric and has excellent water retention properties. It is. In this knitted fabric with poor water retention, even if it absorbs a large amount of water, it absorbs a large amount of moisture, and when the pressure is applied to the knitted fabric by the feet, the moisture returns to the surface of the knitted fabric, and the surface is There is a problem that the feeling of dryness is impaired when wet. However, the present knitted fabric is a knitted fabric that can overcome such problems and has excellent water absorption and water retention, that is, excellent water absorption and water retention.

This water absorption retention can be evaluated by the following method.
(Evaluation method for water retention)
What is cut from a knitted fabric to a size of 10 cm (vertical) × 5 cm (wide) is prepared as a sample. The sample mass (M ₁ ) is measured. Separately, two sheets of filter paper (ADVANTEC No. 2 manufactured by Toyo Roshi Kaisha, Ltd.) cut into the same size as the sample are prepared, and the total mass (M ₂ ) of the two sheets is measured. Distilled water having the same mass (M ₁ ) as the sample, corresponding to a water retention rate of 100%, is dropped into the center of the sample from the syringe. After standing for 5 minutes, the above two filter papers are placed on top of the sample so as to cover them, and a compressive load is applied for 5 seconds so that a pressure of 150 g / cm ² (14.7 kPa) is applied to the entire sample from above. Then, the water that has returned to the surface of the knitted fabric by pressurization is absorbed by the filter paper, and the total mass (M ₃ ) of the two absorbed filter papers is measured. From the values M ₁ , M ₂ , and M ₃ measured as described above, the reverse moisture content (GS) is obtained by the following equation (2), and this is used as an index of water absorption retention. According to the knowledge of the present inventors, the preferred reverse moisture content (GS) in the present invention is 20% or less, more preferably 15% or less, thereby realizing practically sufficient water retention and retention performance.

本編物を靴の中敷きや内張り材として使用する際において、特に裏面側から本編物外への水分の移動を防ぐ必要がある場合には、本編物の裏面に防水樹脂層を積層したり、別途、主として疎水性繊維で構成された織編物を積層してもよい。

When using this knitted fabric as an insole or lining material for shoes, especially when it is necessary to prevent moisture from moving from the back side to the outside of the main knitted fabric, a waterproof resin layer may be laminated on the back side of the main knitted fabric, A woven or knitted fabric mainly composed of hydrophobic fibers may be laminated.

  As the waterproof resin layer, a water-impervious resin film sheet or resin film may be used, and they can be laminated by coating or laminating them on the back surface of the main knit. In order to prevent stuffiness, a moisture-permeable waterproof resin film or a moisture-permeable waterproof resin film is preferable. In addition, when used in sanitary shoe products used in hygiene sites such as food, heat-resistant resin film sheets and resin films that can withstand industrial washing and sterilization at 80 ° C. or higher are preferable. As the heat resistant resin film sheet or resin film, those made of a heat resistant urethane resin are preferable, and for example, a film sheet or film made of a polycarbonate urethane resin can be mentioned.

  Next, the present invention will be specifically described with reference to examples.

In addition, the characteristics of the knitted fabric described in the examples are evaluated as follows.
i. Reverse moisture content (GS)
Although it was calculated | required with the above-mentioned evaluation method of water absorption water retention property, it carried out about three samples per knitted fabric, and the average value was employ | adopted. In addition, when applying a compressive load, a load plate having a length of 10 cm, a width of 5 cm, and a mass of 7.5 kg was used and performed at room temperature.
ii. Dry feeling Similar to the measurement of reverse moisture content, whether or not you feel wetness by dripping distilled water equivalent to the sample in the center of the sample, leaving it for 5 minutes, and pressing it slightly with your palm around the dropped part It evaluated by the sensory test. The test was conducted by 10 panelists and evaluated according to the following criteria, and the evaluation result with the largest number of people was adopted.
Evaluation criteria
(Double-circle): It does not feel wet and water does not touch at all.
○: Wetness is not felt, but it can be visually observed that water is slightly attached.
(Triangle | delta): Wetness is felt and it can visually observe that considerable moisture gets on a hand.
X: Moisture is applied to the hand just by lightly touching and sticky when pressed.
iii. Abrasion resistance (wear strength)
In accordance with JIS L-1018 wear strength A method (uniform form method), five test pieces having a diameter of about 7 cm were taken from the sample, and the friction surface was 2.5 cm in diameter using a uniform type wear tester. Mount on the sample mount and apply a uniform tension to the specimen with a tensile load of 22.3N. The number of times when the specimen was destroyed by rubbing the specimen in multiple directions with a pressing load of 22.3 N using sand paper (P 1 00 C-Cw) manufactured by Nihon Kenshi Co., Ltd. Was measured and expressed as an average value (up to integers).
( Reference Example 1)
To obtain a three-dimensional knitted fabric, a polyester false twisted yarn (Unitika Fiber Co., Ltd., 167 decitex / 48 filament) and water-soluble vinylon fiber (Nichibi Co., Ltd., 30 decitex / 9 filament) are connected to the surface knitted fabric. Polyester processed yarn with a different fineness and a modified cross section ("Lumiace (trade name)", 73 dtex / 44 filament) manufactured by Unitika Fiber Co., Ltd. was used for the part, and cotton combed yarn No. 30 was used for the back of the knitted fabric. Using these yarns, a three-dimensional structure composed of a front knitted fabric, a back knitted fabric, and a connecting portion in a knitting structure shown in FIG. A knitted fabric was knitted using a circular dyeing tester (manufactured by Nisaka Manufacturing Co., Ltd., CUT-TS type) and a surfactant (Nikka Chemical Co., Ltd., Sunmall FL) 1 g / liter. The water-soluble vinylon fibers on the surface of the knitted fabric were dissolved and removed at this stage, and the same circular dyeing test as described above. In the machine, caustic soda and hydrogen peroxide (35%) were used at a rate of 1 g / liter and 5 g / liter, respectively, and a saliva treatment was performed at a bath ratio of 1:25 at 80 ° C. for 30 minutes. The same circular staining as above In order to completely heat-shrink the surface knitted fabric and the polyester fibers of the connecting portion with a testing machine, after performing hot water treatment at 130 ° C. for 30 minutes, a finishing set is performed, and the knitted fabric for the interior of the shoe of the present invention Got.

This knitted fabric had 36 piles / cm ^{2 on} the surface, and the content of hydrophilic fibers (cotton) was 75.6% by mass of the entire knitted fabric. The pile height on the surface was 2.3 mm.
(Example 1 )
Polyester false-twisted yarn (167 decitex / 48 filament, manufactured by Unitika Fiber Co., Ltd.) is used for the knitted surface structure, and cotton combed yarn 30th is used for the back structure of the knitted fabric. 6), a knitted fabric was knitted with a pile knitting structure shown in Fig. 6. In the same manner as in Reference Example 1, relaxing scouring, smoothing, hot water treatment and finishing were performed on this knitted fabric. The knitting for interior decoration of shoes of the present invention was obtained by setting.

This knitted fabric had 22 piles / cm ^{2 on} the surface, and the content of hydrophilic fibers (cotton) was 34.2% of the entire knitted fabric. The pile height on the surface was 1.1 mm.
( Reference Example 2 )
A knitted fabric was obtained in the same manner as in Reference Example 1, except that a 33 "* 14G circular knitting machine (V-8E type, manufactured by Fukuhara Seiki Co., Ltd.) different from Reference Example 1 was used. Was 18 pieces / cm ² , the pile height was 1.7 mm, and the content of hydrophilic fibers (cotton) was 36.8%.
( Reference Example 3 )
Reference Example 1 except that half of the yarn to be fed for knitting the reverse side knitted fabric was replaced with polyester false twisted yarn (165 decitex / 48 filament, manufactured by Unitika Fiber Co., Ltd.) from 30th cotton combed yarn In the same manner as above, a knitted fabric was obtained.

In this knitted fabric, the pile density on the surface was 38 pieces / cm ² , the pile height was 2.3 mm, and the content of hydrophilic fibers (cotton) was 17.3%.
(Comparative Example 1 )
In the knitting machine used in Reference Example 1, polyester false twisted yarn (Unitika Fiber Co., Ltd., 167 dtex / 48 filament) was used for knitting with an interlock structure to obtain a knitted fabric of Comparative Example 1 . . For this knitted fabric, a surfactant (manufactured by Nisaka Chemical Co., Ltd., Sunmall FL) was used at a concentration of 1 g / liter with a circular dyeing tester (manufactured by Nisaka Seisakusho, CUT-TS type). Then, relaxing scouring was performed at 80 ° C. for 30 minutes at a bath ratio of 1:35. Next, 5% o. m. A comparative knitted fabric was obtained by carrying out water absorption treatment at 130 ° C. for 30 minutes at a bath ratio of 1:35 using a concentration of f.

The results of evaluating the characteristics of the knitted fabrics obtained in the above Reference Examples, Examples and Comparative Examples are shown in Table 1 below.

表１から分かるように、実施例１の編物は、逆戻り水分率が低く吸水保水性に優れており、表面の快適なドライ感を実現するものであり、耐摩耗性についても良好なものとなった。したがって、これら実施例１の本発明の靴の内装用編物は、靴の中敷及び内張り材として好適に使用でき、使用感も満足のゆくものであった。

As can be seen from Table 1, the knitted fabric of Example 1 has a low reverse moisture content and excellent water-absorbing water retention, realizes a comfortable dry feeling on the surface, and also has good wear resistance. It was. Therefore, the knitted fabric for shoe interior of the present invention of Example 1 can be suitably used as a shoe insole and lining material, and the feeling of use is satisfactory.

About Comparative Example 1 , since hydrophilic fibers were not contained, water retention and water retention were greatly inferior, and since no pile was present, abrasion resistance was also inferior.

  Therefore, the knitted fabric of Comparative Example 1 was inferior to that of Example 1 in the feeling of use as a shoe interior material.

It is the top view which represented typically an example of the surface pile distribution form about this knitted fabric. It is the top view which represented typically an example of the surface pile distribution form about this knitted fabric. It is the top view which represented typically an example of the surface pile distribution form about this knitted fabric. 3 is a cross-sectional view schematically showing a cross-sectional structure of a knitted fabric obtained in Reference Example 1. FIG. 5 is a knitting organization chart employed in Reference Example 1. FIG. 1 is a knitting organization chart employed in Example 1. FIG.

Explanation of symbols

1 Pile 2 Pile dense area 3 Pile-free area 4 Surface knitted fabric 5 Back knitted fabric 6 Connected yarn
CY cylinder needle
DY Dial needle a Polyester yarn b used for surface structure b Thread used for connecting part c Thread used for back surface structure d Water-soluble vinylon yarn used for knitting surface knitted fabric

Claims (3)

A pile knitted fabric having a pile and a knitted fabric body knitted using a circular knitting machine, wherein the knitted fabric body forms a stitch in a state where polyester false twisted yarn and cotton combed yarn are aligned. The pile is formed only of the false twisted yarn , 30% by mass or more of the entire pile knitted fabric is cotton combed yarn, and the pile is applied so as to contact the skin. Knitted fabric for interior shoes. The knitted fabric for shoe interior according to claim 1, wherein an area where the pile is present at a density of 20 pieces / cm ² or more and an area where no pile exists are unevenly distributed. A laminated sheet for interior of shoes , wherein a waterproof resin layer is laminated on the knitted fabric main body side of the knitted fabric for interior of shoes according to claim 1 or 2 .

Images