JP2016160551A - Knitted fabric and wiping cloth - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a knitted fabric suitable for use as a wiping cloth that is excellent in sustainable wiping performance as a matter of course, and capable of smoothly wiping the surface of an object with a reduced force even under conditions with a liquid such as water being interposed, and that is difficult to leave liquid drop marks on the surface of the object and is difficult to damage the surface of the object after wiping.SOLUTION: A knitted fabric comprises: a front face formed of a polyester yarn having a single filament fineness of 0.1 to 1.5 dtex; and a rear face formed of a synthetic fiber yarn having a single filament fineness of 0.01 to 1.0 dtex. The polyester yarn constituting the front face has a single filament fineness corresponding to 1.5 to 20 times larger than that of the synthetic fiber yarn constituting the rear face. The knitted fabric has an uneven portion with a difference in height of 0.3 to 0.8 mm on the surface. The density of the recesses is 10 to 50 pieces/cm. The knitted fabric has a thickness of 0.7 to 1.5 mm.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a knitted fabric suitable for a wiping cloth, and more particularly to a knitted fabric suitable for a wiping cloth capable of wiping off an automobile after washing and the like, and a wiping cloth made of the knitted fabric.

  Conventionally, wiping cloths have been deployed in a wide range of fields, from household use such as household cleaning tools and glasses wiping to industrial use such as car cleaning and wiping tools. In particular, wiping cloths using synthetic fibers, especially polyester fibers, are widely used from the viewpoints of productivity and low dust generation.

  However, the conventional wiping cloth does not exceed the range of general handkerchiefs, towels, towels, etc., and exhibits excellent wiping properties for small amounts of dirt, but for example when wiping oil stains However, the wiped-off dirt tends to adhere to the surface of the cloth, and when the cloth is used again, the dirt may be spread.

  In view of this, there has been proposed a contrivance that suppresses the spread of dirt when the cloth is used again by providing irregularities on the cloth surface and transferring the dirt to the recesses (for example, Patent Document 1).

JP 2006-6537 A

  The cloth described in the above-mentioned patent document is excellent in continuous wiping performance as compared with conventional cloths, but has a drawback that it has poor water retention because it is mainly composed of polyester fibers. Since polyester is a hydrophobic polymer, a cloth mainly composed of polyester fibers is inevitably lacking in water retention unless a water absorbing property or a structure capable of absorbing water is given.

  When the water retention of the cloth becomes poor, for example, when wiping with water or wiping water, a film of water or the like is formed between the cloth and the object to be wiped, and the movement of the cloth is greatly hindered. Accordingly, the cloth is not problematic in terms of handling as long as it is used in a so-called dry wiping state, but becomes extremely difficult to handle when water or the like is present.

  However, even with such a cloth, if a strong force is applied, it is possible to move the cloth even in a situation where water or the like is present. However, even if it can move with a strong force, after wiping off, traces of streak-like drops may remain on the surface of the object, which in turn detracts from the beauty of the object. In particular, when sand dirt, mud dirt, or the like adheres to the surface of the object, if the surface is wiped off with a strong force, the sand or mud may be dragged strongly and the surface may be damaged.

  Accordingly, an object of the present invention is to eliminate the above-mentioned drawbacks of the prior art, and it is of course excellent in continuous wiping properties, and even in a situation where a liquid such as water is present, a little force is required. Therefore, the surface of the object can be wiped off smoothly, and a knitted fabric suitable for a wiping cloth that does not easily leave a trace of a drop and does not easily damage the surface after wiping is provided.

  As a result of studies by the present inventors, when water or the like adheres to the surface of the object, the cloth tends to stick to the surface of the object due to the surface tension of water or the like, which prevents the movement of the cloth, It was found that traces of the droplets remained with the movement of the cloth. Therefore, we studied the design of the knitted fabric constituting the cloth under the idea that if such water is removed quickly, the cloth can be moved smoothly without leaving traces of drops, the design of the knitted fabric constituting the cloth was examined. If a thread with a fine single yarn fineness is placed on the surface and a thread thinner than that is placed on the back surface, the water retention capacity of the back layer is relatively higher than that of the surface layer, resulting in a capillary tube It has been found that water can be quickly absorbed by the phenomenon and the sucked-up water can be stored (retained) in the back layer. By doing so, the surface of the object can be smoothly wiped with a little force, and it is difficult to leave a drop mark after wiping. At the same time, scratches are less likely to remain.

  In addition to the above, when the cloth after wiping off the dirt is used again, the design of the knitted fabric that can effectively suppress the spread of the dirt is further devised. The present inventors have found that desired effects can be obtained by specifying the single yarn fineness and fineness ratio, and specifying the surface shape, knitted fabric thickness, and the like. The present invention has been completed by further studies based on these findings.

That is, in the present invention, first, the surface is composed of a polyester yarn having a single yarn fineness of 0.1 to 1.5 dtex, and the back surface is composed of a synthetic fiber yarn having a single yarn fineness of 0.01 to 1.0 dtex. The polyester yarn constituting the surface has a single yarn fineness 1.5 to 20 times thicker than the single yarn fineness of the synthetic fiber yarn constituting the back surface, and the surface has a height difference of 0.3. Summary of knitted fabric characterized in that it has concavo-convex portions of ~ 0.8 mm, the density of the concave portions is 10-50 pieces / cm ² , and the thickness of the knitted fabric is 0.7-1.5 mm. It is what.

  According to the present invention, it is possible to provide a knitted fabric suitable for a wiping cloth that can be used while suppressing the spread of dirt and can be used repeatedly even after the dirt is wiped off. In addition, the wiping cloth can wipe the surface of the object smoothly with a little force even under the condition where a liquid substance such as water is present, and it is difficult to leave a trace of a droplet after wiping. Also, the surface of the object is difficult to be damaged.

  The wiping cloth of the present invention having such characteristics is suitable for, for example, wiping automobiles after washing, wiping off oil stains in kitchens, etc., wiping windows and brass instruments, etc., and can be finished aesthetically. .

It is an example of a suitable knitting structure in the present invention. It is an example of the knitting structure | tissue which can be used in this invention.

  Hereinafter, the present invention will be described in detail.

  The knitted fabric of the present invention is a knitted fabric having a multilayer structure having fiber layers on the front and back surfaces. In the present invention, another fiber layer may be provided between the front and back layers, but basically a two-layer structure is preferred.

  In the present invention, polyester yarn is mainly used on the front surface and synthetic fiber yarn is used on the back surface, but other yarns may be used in combination as long as the effect is not impaired. The composition and form of the other yarns are not particularly limited, but as described later, the knitted fabric of the present invention is mainly used as a wiping cloth.

  In the present invention, the single yarn fineness and the fineness difference of the yarns constituting the front and back surfaces are defined. Specifically, the front surface is composed of polyester yarn having a single yarn fineness of 0.1 to 1.5 dtex, and the back surface is composed of synthetic fiber yarn having a single yarn fineness of 0.01 to 1.0 dtex. Then, the single yarn fineness of the polyester yarn to be arranged on the front surface is made 1.5 to 20 times thicker than the single yarn fineness of the synthetic fiber yarn to be arranged on the back surface.

  The surface of the knitted fabric corresponds to a wiping surface when a wiping cloth is used. By reducing the single yarn fineness as described above, water or liquid on the surface of the object can be quickly sucked up by utilizing the capillary phenomenon. And the fine stain | pollution | contamination adhering to the target object surface can be efficiently scraped off by making the single yarn fineness thin. However, if it is too thin, the rigidity of the fiber will be lost, it will be in close contact with the object with a little finger pressure, and it will be difficult to move the cloth smoothly. In that sense, if the single yarn fineness is less than 0.1 dtex, the ability to scrape dirt is improved, but the contact area with the object also increases, so that the movement of the cloth is hindered when water or liquid is present. It becomes easy to be done. On the other hand, if it exceeds 1.5 dtex, the ability to scrape off the dirt decreases, and the capillary phenomenon becomes difficult to work, so that water or the like cannot be absorbed quickly.

  As described above, in the present invention, it is possible to make it difficult to leave a trace of a drop later by wiping off the surface of the object while quickly removing the adhering water or liquid. In order to absorb water or the like, a hydrophilic fiber yarn is generally suitable. However, if a hydrophilic fiber yarn is used to form the surface, water absorption is surely ensured, but water or the like remains on the yarn itself, and droplet marks remain. In addition, those using hydrophilic fiber threads are difficult to squeeze water after wiping. Therefore, in the present invention, polyester yarn is used. If polyester is used, it is easy to squeeze water and the drying speed is fast. On the other hand, since polyester yarn is a hydrophobic yarn itself, it cannot quickly absorb water or the like simply by using it. Therefore, the single yarn fineness is optimized as described above. Thereby, when it is set as a wiping cloth, water etc. can be absorbed quickly.

  As the polyester yarn in the present invention, a yarn obtained by directly reducing the fineness through spinning and drawing, or a yarn obtained by bundling a plurality of composite fibers composed of an alkali-soluble polyester component and an alkali-insoluble polyester component are knitted. Thereafter, an alkali splitting to reduce the fineness can be used.

  On the other hand, the back surface of the knitted fabric is a surface opposite to the wiping surface when a wiping cloth is used. In the present invention, when used as a wiping cloth, for the purpose of reducing traces of droplets after wiping, it is preferable to have a structure in which liquids such as water sucked up from the surface easily collect on the back surface. Therefore, the back surface is composed of synthetic fiber yarns having a single yarn fineness of 0.01 to 1.0 dtex, and the single yarn fineness of the polyester yarn arranged on the surface is determined by the single yarn fineness of the synthetic fiber yarn arranged on the back surface. It needs to be 1.5 to 20 times thicker. By doing so, it becomes difficult for water or the like to remain on the surface, and it becomes difficult to leave traces of drops. Moreover, the movement of the cloth becomes smooth, and as a result, the surface of the object is hardly damaged.

  Here, when the single yarn fineness of the back surface synthetic fiber yarn is less than 0.01, there is no particular problem in terms of water retention, but the durability of the knitted fabric is lowered as the strength of the yarn is lowered. On the other hand, when it exceeds 1.0 dtex, the water retention is lowered, and it becomes difficult to keep a liquid material such as water on the back layer. Furthermore, when a wiping cloth is used, liquid materials such as water may be reversed due to finger pressure. As for the fineness ratio, if the ratio of the single yarn fineness of the front polyester yarn and the single yarn fineness of the back synthetic fiber yarn is less than 1.5 times, it becomes difficult to provide a difference in water retention between the two layers. It becomes difficult to quickly transfer water sucked up from the surface. Furthermore, it becomes difficult to retain water or the like on the back layer. On the other hand, even if the fineness ratio exceeds 20 times, there is no particular problem in terms of water transfer and water retention, but the single yarn fineness of the yarn constituting the back surface is inevitably considerably reduced, and the back layer is soft and not rigid. It will be a thing. If it does so, when it is set as a wiping cloth, water etc. may return easily with a little finger pressure. Moreover, it becomes easy to cause trouble also in the point of handling.

  In the present invention, with such a configuration, the knitted fabric back surface layer can retain more water or the like than the surface layer. By having such a water retaining layer on the back surface, the water absorbed by the surface layer positively moves to the back surface layer. And since the amount of water in the surface layer is reduced, water or the like is less likely to intervene, and the movement of the cloth is facilitated.

  Here, examples of the synthetic fiber yarn constituting the back surface include polyester, nylon, rayon, nylon, polyvinyl alcohol yarn (PVA yarn) and the like, and polyester and nylon yarn that can be easily made finer are preferable. A seed yarn may be used in combination. Synthetic fiber yarn types include those that are made finer directly through spinning and drawing, and yarns composed of composite fibers composed of an alkali-soluble polyester component and an alkali-insoluble polyester component. After knitting, it is possible to adopt an alkali split to reduce the fineness.

  In addition, the knitted fabric of the present invention has an uneven portion with a height difference of 0.3 to 0.8 mm formed on the surface. This uneven portion is not a pile fabric as if a pile was regarded as a convex portion, but a knitted structure was devised to form a shape with a height difference on the surface of the knitted fabric. Since this low part becomes a concave part and the concave part and the concave part are relatively raised, this raised part becomes a convex part.

  Due to such uneven portions, the fibers disposed on the convex portions on the surface of the knitted fabric scrape off the dirt from the surface of the object, and then transfer and keep the dirt in the concave portions, so that the wiping property is maintained. Furthermore, since only the convex portions are easily in contact with the object, the contact area is reduced, and the movement of the cloth becomes smoother.

  When the height difference is less than 0.3 mm, the depressions in the recesses become shallow and it becomes difficult to accumulate dirt, so that it becomes easier to spread dirt when the cloth is used again after wiping. In addition, if the dent becomes too shallow, the contact area with the object increases, and the movement of the cross tends to be delayed. On the other hand, if it exceeds 0.8 mm, the convex portion protrudes excessively, and it becomes difficult for the finger pressure to spread over the entire cloth, so that the wiping property is lowered. Moreover, the whole knitted fabric becomes a thing with many space | gap because the hollow of a recessed part becomes large, and water absorption power falls by the total contact area with a target object reducing.

  An uneven | corrugated | grooved part can be formed by arranging a tack structure | tissue in surface structure, for example. Since the tack portion becomes a concave portion and the adjacent tack portions are relatively raised, this portion becomes a convex portion. The tack portion also serves as a connecting portion that connects the front and back surfaces of the knitted fabric, and water or the like is conveyed to the back surface through the yarn of the tack portion. Furthermore, since the surface of the knitted fabric is knitted from the above-described yarn having a fine single yarn fineness, the tack structure is similarly knitted from the yarn having a fine single yarn fineness. Then, due to the capillary action acting on the yarn, water or the like accumulated on the back surface is unlikely to return to the surface, and the cross surface tends to always have a dry feel.

  The height difference of the concavo-convex portions can be adjusted by knitting growth, and it is usually preferable that the knitting growth of the tack structure is 27 to 36 cm / 100 W. Optimizing the knitting growth is also preferable in terms of improving the pilling resistance and wear resistance of the knitted fabric. Further, the height difference can be adjusted, for example, by adjusting the winding tension at the time of knitting or adjusting the finishing width at the time of post-processing.

Furthermore, the concavo-convex portions are formed so that the density of the dents satisfies a range of 10 to 50 / cm ² . When the density is less than 10 pieces / cm ² , the shape of the surface of the knitted fabric becomes almost flat, and the cloth easily sticks to the surface of the object under the condition where water or the like is interposed, and the movement of the cloth is hindered. It becomes easy. Moreover, it becomes difficult for the fibers of the convex portion to scrape off dirt, and it is difficult to keep the dirt. On the other hand, if the density exceeds 50 / cm ² , the total contact area with the object is reduced, and the water absorption and wiping properties are reduced. The density of the recess is more preferably 20 to 40 / cm ^2.

  The recess density can be adjusted by adjusting the interval between the tack portions, the needle density, and the like. The needle density is preferably 22 to 28G. In addition, the concave portion density can be adjusted by adjusting the winding tension during knitting and the finishing width during post-processing.

  Furthermore, the knitted fabric of the present invention has a thickness in the range of 0.7 to 2.0 mm. Even if the thickness is less than 0.7 mm, the water retention rate described later does not immediately decrease, but it is easy to reach the water retention limit with a little water retention, and the amount of water adhering to the surface of the object is somewhat Just by increasing, it tends to leave traces of drops after wiping. On the other hand, if it exceeds 2.0 mm, the cloth becomes bulky and difficult to handle. The thickness can be adjusted by appropriately adjusting the knitting structure, knitting growth, yarn thickness, finishing width, and the like.

  1 and 2 illustrate knitting structures that can be preferably employed in the present invention. 2 has a tendency that the density of the recesses is sparser than that in FIG.

  In the present invention, as described above, the yarn type, thickness, fineness ratio, surface shape, thickness, etc. are each specified, and due to their synergistic effects, wiping properties are good and can be used repeatedly. It is possible to provide a knitted fabric suitable for a wiping cloth capable of finishing an object beautifully and easily.

  In the present invention, in addition to this, a polyester highly shrinkable yarn may be inserted into the back of the knitted fabric. Thereby, the structure of the back surface becomes dense, and the height difference of the surface irregularities becomes clearer. As a result, the wiping property is further maintained and the movement of the cloth is smoother. Furthermore, the fabric weight and thickness can be easily adjusted through post-processing of the knitted fabric, which is advantageous in designing a knitted fabric excellent in water absorption and water retention.

  The means for inserting the high shrinkage yarn is not particularly limited. For example, as the yarn constituting the back surface, a yarn in which a synthetic fiber yarn having a single yarn fineness of 0.01 to 1.0 dtex and a high shrinkage yarn are combined. Should be used. In this case, the composite yarn may be a composite of two yarns directly. However, since the single yarn fineness of the synthetic fiber yarn is very thin, from the viewpoint of process control and quality improvement, an alkali-soluble polyester It is preferable to use a composite yarn of a yarn composed of a composite fiber composed of a component and a hardly alkali-soluble polyester component and the highly shrinkable yarn, and after the knitting, it is fine in the fineness range by alkali splitting. Means for achieving this is preferably employed.

  Moreover, a high shrinkage yarn can also be inserted in a back surface by knitting a high shrinkage yarn with respect to a back surface synthetic fiber yarn. In the present invention, the means using the plating knitting is particularly suitable. As a result of easily adjusting the mixing ratio between the back surface yarn and the high shrinkage yarn during knitting, the weight per unit area, the thickness, and the like can be achieved.

  As the polyester high shrinkage yarn, any material can be used as long as it has a higher boiling water shrinkage than other yarns constituting the knitted fabric and can be thermally shrunk during post-processing of the knitted fabric, Preferably, a polyester high shrink yarn having a boiling water shrinkage of 10 to 30% and a single yarn fineness of 0.5 to 5.0 dtex is used.

  Here, when the boiling water shrinkage rate is less than 10%, the degree of thermal shrinkage is reduced, and the above-described effects such as clarifying the concavo-convex portion are hardly obtained. On the other hand, if it exceeds 30%, unevenness in the height difference of the concavo-convex part is likely to occur, or the concave part is closed, so that excellent wiping property tends to be difficult to be sustained.

  In addition, if the single yarn fineness of the high shrinkage yarn is less than 0.5 dtex, it becomes difficult to obtain a desired boiling water shrinkage rate as the fineness is reduced, and if it exceeds 5.0 dtex, the fineness is increased. Accordingly, as a result of the boiling water shrinkage rate becoming higher, the knitted fabric may become wrinkled through post-processing, which is not preferable for forming clear uneven portions.

As the polyester high shrinkage yarn, for example, the total content of ethylene glycol and terephthalic acid is 85 mol% or more, the content of isophthalic acid or the like is 15 mol% or less, and 2,2bis {4- A yarn obtained by spinning and stretching a copolyester containing (2-hydroxyethoxy) phenyl} propane can be used.
Next, an index for evaluating the water retention of the knitted fabric will be described. Specifically, the water retention index is preferably 280% or more, more preferably 280 to 500%. When the water retention rate is less than 280%, water absorption tends to be poor, and when water or the like adheres to the surface of the object, the amount of water that can be absorbed with a single wipe tends to decrease. For this reason, there are times when the surface of the object must be wiped repeatedly, and this can easily damage the surface of the object.

For the measurement of the water retention rate, first, a sample cut out in a 25 cm square is prepared. Next, the mass (W ₀ ) before being subjected to the test is measured, and then the sample is immersed in distilled water for 10 minutes. After immersion, one end of the four corners of the sample is lifted and left stationary for 10 minutes, and then the mass (W ₁ ) is measured. Then, the water retention rate (%) = [(W ₁ −W ₀ ) / W ₀ ] × 100 is calculated.

  Although it does not specifically limit as a use of the knitted fabric of this invention, A wiping cloth is the most suitable. When used as a wiping cloth, the surface may be directed to the object, the back surface may be applied with finger pressure, and the knitted fabric itself may be used as it is, but preferably the edges are sewn and the edges are sewn. It is good to use in the form. By carrying out like this, after sewing, both front and back become a wiping surface, and it becomes easier to use. In addition, by overlapping the back surfaces, water can be stored in the gaps between the overlapping portions, and a further increase in the water retention amount can be expected. For this reason, much water etc. can be wiped off by one wiping.

  When the back surfaces are used in an overlapped manner, a place other than the edge may be sewn arbitrarily, but if the number of sewing parts is increased excessively, the cross-shaped surface shape of the cloth will be destroyed by the sewing thread, so it is preferable not to increase too much. . Since the knitted fabric of the present invention does not require a strong force for wiping off the surface of the object, the positional relationship between the two knitted fabrics is difficult to shift during use even when sewing only the edge portion, and has an excellent effect as a wiping cloth. .

  The wiping cloth of the present invention is suitable, for example, for wiping automobiles after washing, wiping brass instruments, further wiping oil stains in kitchens, etc., and window wiping, and is particularly suitable for wiping automobiles. If the wiping cloth of the present invention is used, it is difficult to leave traces or scratches after wiping, and the object can be finished with good aesthetics.

  EXAMPLES Hereinafter, although this invention is demonstrated concretely based on an Example, this invention is not limited to these. Various characteristics were measured by the following methods.

(1) Single yarn fineness and fineness ratio of yarns constituting the front and back surfaces of the knitted fabric First, the yarns constituting the front and back surfaces are each extracted from the knitted fabric after processing, and JIS L1013 8.3.1B method (simple method) The total fineness was calculated based on Thereafter, the number of filaments was counted based on JIS L1013 8.4, and the total fineness was divided by the number of filaments to obtain each single yarn fineness. After calculating the single yarn fineness, the fineness ratio was calculated.

(2) Boiling water shrinkage ratio of polyester high-shrinkage yarn The yarn before knitting is squeezed five times with a measuring machine having an outer circumference of 1.125 m, doubled, a load of 1/10 g / dtex is applied, and the sample length Measure a. Then, after applying a load of 1/6000 g / dtex and allowing to stand for 30 minutes, treated with boiling water for 30 minutes, dried, applied a load of 1/10 g / dtex, measured the sample length b, and contracted with boiling water ( %) = [(A−b) / a] × 100.

(3) Single yarn fineness of polyester high-shrinkage yarn The total fineness of the high-shrinkage yarn before knitting is calculated based on the JIS L1013 8.3.1B method (simple method), and then based on JIS L1013 8.4. The number of filaments was counted, and the total fineness was divided by the number of filaments to obtain a single yarn fineness.

(4) Difference in height of the concavo-convex portion The post-processed knitted fabric is cut along the stitches in the wale direction, and a cross section of the cut sample is used with a digital microscope (manufactured by KEYENCE, VHX-900) at a magnification of 50 times. And the height from the tip of the convex part to the bottom of the concave part was measured. The height difference of 10 places was measured with respect to one sample, and the average value was defined as the height difference of the uneven portion of the knitted fabric.

(5) Density of recesses The surface of the knitted fabric after post-processing was observed using a loupe, and the number of recesses that appeared to be 1 cm ² was visually counted.

(6) Thickness of knitted fabric The thickness of the knitted fabric after post-processing was measured based on JIS L1018 8.5.1.

(7) Knitting growth of tack structure In the knitted fabric before post-processing, an arbitrary point on the surface and a point of 100 W from that point were marked respectively. Next, the yarn was unwound for each knitted structure, and the yarn length was measured by applying a load of 1/10 g / dtex to the yarn of the tack structure, and this was regarded as knitting growth of the tack structure.

(8) A feeling of sticking when wiping off moisture and the remaining amount of traces of drops For the knitted fabric after the post-processing, prepare two samples cut out in a 20 cm square, and superimpose the back surfaces of these samples, A wiping cloth was formed by sewing the edges. Next, the wiping cloth was immersed for 10 minutes in a water tank in which water was sufficiently stored, the cloth was pulled up, and then squeezed by hand so that the moisture content was 100%. Then, the surface of the aluminum plate to which 10 mL of water has been dropped and adhered is wiped off with a cloth that has been squeezed earlier. Sensory evaluation was performed in four stages. In addition, on the surface of the aluminum plate after wiping, the remaining level of the traces of the droplets is sensory in four stages: ◎ (there are almost no traces of the drops), ○, Δ, × (the traces of the drops are largely left). evaluated.

Example 1
A polyester yarn of 72 dtex 168f, a polyester composite fiber yarn of 78 dtex 48f, and a polyester high shrink yarn of 33 dtex 12f with a boiling water shrinkage of 22% were prepared. Note that. The polyester composite fiber yarn is a yarn obtained by bundling composite fibers composed of an alkali-soluble polyester component and an alkali-poorly soluble polyester component (384f after splitting). The above three yarns are introduced into an LPJ-H type knitting machine (hook diameter 33 inches, needle density 28G) manufactured by Fukuhara Seiki Co., Ltd., and the back surface is knitted with polyester yarns with the structure shown in FIG. The yarn was knitted by plating a high shrinkage yarn on the yarn.

  After knitting, the green machine was scoured with a liquid dyeing machine at 80 ° C. for 20 minutes. Thereafter, using a bath with an alkali concentration of 20 g / L, alkali splitting was performed at 100 ° C. for 30 minutes. Subsequently, SR1801conc (manufactured by Takamatsu Yushi Co., Ltd.) was used at 3.0% omf, and was subjected to relaxation treatment at 130 ° C. for 30 minutes using a liquid dyeing machine, also serving as water absorption. Thereafter, final setting was performed at 170 ° C. for 1 minute to obtain a knitted fabric.

(Example 2)
A raw machine was obtained by knitting in the same manner as in Example 1 except that a polyester yarn of 84 dtex 72f was used instead of the polyester yarn of 72 dtex 168f. Thereafter, post-processing was performed in the same manner as in Example 1 to obtain a knitted fabric.

(Example 3)
It knits in the same manner as in Example 2 except that a 78 dtex 48f polyester composite fiber yarn (960f after split) is used instead of the 78 dtex 48f polyester composite fiber yarn (after split yarn 384f). After the same processing as in No. 2, a knitted fabric was obtained.

(Comparative Example 1)
The same procedure as in Example 1 was carried out except that the yarn was knitted using a 72 dtex 168f polyester yarn instead of the 78 dtex 48f polyester composite fiber yarn (384 f after splitting) and that the alkali splitting was omitted in the post-processing. Got knitted fabric.

(Comparative Examples 2 and 3)
Example 1 except that the smooth structure was adopted instead of the structure of FIG. 1 (Comparative Example 2) and the structure of FIG. 2 was adopted instead of that of FIG. 1 (Comparative Example 3). Done and got the knitted fabric.

(Comparative Example 4)
A knitted fabric was obtained in the same manner as in Example 1 except that the winding tension at the time of knitting and the finishing width at the time of post-processing were changed together with the interval between the tack portions.

(Comparative Example 5 and Comparative Example 6)
A knitted fabric was obtained in the same manner as in Example 2 except that the winding tension at the time of knitting and the finishing width at the time of post-processing were changed together with the knitting growth of the tack structure.

  The knitted fabric of the present invention, as shown in Table 1 Example column, is excellent in water retention, can smoothly wipe the surface of an object with a little force even under the condition where water is present, and drops after wiping It was difficult to leave a trace.

  In contrast, in the knitted fabric of Comparative Example 1, the fineness ratio between the front surface yarn and the back surface yarn is less than the predetermined range, so that it is not possible to provide a difference in water retention between both back surface layers, and water is quickly returned to the back surface. Could not be moved to. As a result, the surface of the object could not be wiped off smoothly, and the traces of the droplets remained after wiping.

  Since the surface form of the knitted fabric of Comparative Example 2 was smooth, continuous wiping property could not be expected. Moreover, compared with the thing of Example 1, the movement of the knitted fabric became easy to stay under the condition where water intervenes. Furthermore, the thickness became thin, and after wiping, a trace of the droplet was left.

  In the knitted fabric of Comparative Example 3, since the density of the concave portions is too small, the contact area between the knitted fabric and the object increases, and movement during wiping is easily hindered.

  In the knitted fabric of Comparative Example 4, since the density of the concave portions is too large, the total contact area with the object is reduced, and the water absorption force on the surface of the knitted fabric is reduced. As a result, water remains on the object surface, and movement during wiping is performed. Was hindered and the traces of the drops remained.

  In the knitted fabric of Comparative Example 5, since the unevenness of the uneven portion was not sufficient, the contact area with the object increased, and the movement of the knitted fabric was easily hindered during wiping.

Further, in the knitted fabric of Comparative Example 6, the unevenness of the concavo-convex part exceeded the predetermined range, and since many voids were formed in the knitted fabric, the water absorption and water retention decreased, and the traces of drops after wiping remained. It became easy.

Claims (6)

The above-mentioned polyester yarn constituting the surface, the surface of which is composed of a polyester yarn having a single yarn fineness of 0.1 to 1.5 dtex, and the back surface of which is composed of a synthetic fiber yarn having a single yarn fineness of 0.01 to 1.0 dtex. The single yarn fineness of the knitted fabric is 1.5 to 20 times thicker than the single yarn fineness of the synthetic fiber yarn constituting the back surface, and has an uneven portion with a height difference of 0.3 to 0.8 mm on the surface. The density of the recessed part is 10-50 pieces / cm < ² >, Furthermore, the thickness of the knitted fabric is 0.7-1.5 mm, The knitted fabric characterized by the above-mentioned.   The polyester high-shrinkage yarn having a boiling water shrinkage of 10 to 30% and a single yarn fineness of 0.5 to 5.0 dtex is plated with the synthetic fiber yarn. The knitted fabric according to 1.   The tack structure is arranged in the surface structure, and the uneven portion is formed by the tack structure, and the knitting growth of the tack structure is 27 to 36 cm / 100 W. Knitted fabric.   The knitted fabric according to any one of claims 1 to 3, wherein the water retention rate is 280% or more.   A wiping cloth using the knitted fabric according to any one of claims 1 to 4. The wiping cloth according to claim 5, wherein the edges are sewn after overlapping the back surfaces.

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