TW200303384A - Nonwoven fabric for wiper - Google Patents

Abstract

To provide a nonwoven fabric for wiper having excellent hand feeling and washing resistance, may exert good cleaning effect on irregular objects to be wiped, and are excellent in the remove of stains such as oil films as well as clung stains. A nonwoven fabric for wiper comprising extremely fine fibers wherein the a linear and/or dot-shaped adhesive area and a non-adhesive area are present on the surface of the nonwoven fabric wherein 10 to 80% of the surface area of the nonwoven fabric are the adhesive area and the distance between adjacent adhesive areas is 20 mm or less.

Description

200303384 发明 Description of the invention (the description of the invention should state: the technical field to which the invention belongs, the prior art, the content, the embodiments, and the drawings) In other words, the present invention relates to a dirt that can be wiped off, such as an oil film, or a stubborn dirt that adheres to it, and even if it is repeatedly used, there is little fluff, and the washing durability is excellent. (2) Previous technologies Various proposals have been made on non-woven rags using extremely fine fibers, which are currently widely used. For example, a cloth material is proposed in which the hot-melt fiber twill and the ultra-fine fiber twill are integrated by interweaving with water, and the hot-melt fiber is melted (Japanese Patent Laid-Open No. 3-152255). However, although this cloth material can wipe fine dirt such as dust or dust, it is not easy to wipe attached stubborn dirt, and after washing, there will be problems of fluff or fiber shedding on the surface or poor flexibility. In addition, it discloses non-woven cloths for wiping cloths that contain ultra-fine fibers that have been mechanically divided, have large volume wiping, and can be used for a long time (Japanese Patent Application Laid-Open No. 5-5 6 903). However, although the non-woven cloth for wipers is excellent in wiping off dust, it cannot satisfy the removability of stubborn dirt. In addition, for the purpose of improving the wiping property of adhered dirt, a non-woven cloth for wiping cloth in which ultra-fine fibers and coarse-density fibers are blended has been proposed (Japanese Patent Application Laid-Open No. 6- 1 4860). In addition, for the purpose of improving washing durability, a long-fiber twill is laminated with a paper sheet, and a woven cloth is proposed (Japanese Patent Application Laid-Open No. 7-67 820). However, these rags are hard to handle and poor in softness, so that a sufficient wiping effect cannot be obtained for those who have unevenness as a wiping object. Therefore, 尙 has not proposed a non-woven cloth for wiping off stains such as ink or stubborn stains and having excellent washing durability. -6- 200303384 (III) Summary of the Invention The present invention is intended to solve the above problems. The purpose of the present invention is to provide an excellent wiping property against dirt such as oil film and even stubborn dirt. It can be used as a non-woven cloth for wipes, which has excellent sweeping effect and excellent flexibility and washing durability. The means for solving the problem is that the non-woven cloth for rags of the present invention is a non-woven cloth for rags containing ultrafine fibers, wherein the non-woven cloth has linear and / or dot-shaped adhesion areas and non-adhesion areas on the surface, and the adhesion area occupies the non-woven fabric. The surface area is 10 to 80%, and the distance between adjacent bonding areas is 20 mm or less. Embodiments of the invention The non-woven fabric for a wiper according to the present invention is characterized by containing extremely fine fibers, and the surface of the non-woven fabric has linear and / or dot-shaped adhesion areas and non-adhesion areas. The presence of linear and / or dot-like adhesion areas and non-adhesion areas allows fine dirt such as oil films, inks, and even stubborn dirt to be adhered to. It has excellent removability, and there are few fine hairs that can be repeatedly washed and used. The single-fiber fineness of the ultrafine fibers used in the present invention is preferably 0.5 dtex or less, and more preferably 0.05 to 0.45 dtex. The ultrafine fibers are, for example, a direct-spun yarn type fiber and a split type composite fiber. In the present invention, the split type composite fiber is preferably used. Among these, it is more preferable to use ultrafine fibers obtained by dividing a split-type composite fiber having a cross-sectional shape of approximately a circular shape, since the cross-sectional shape has a sharp angle, and it is easy to wipe dirt such as oil films. The split composite fiber can be split by mechanical action such as water flow, knitting and perforation, or chemical action such as dissolution, removal, expansion and contraction, etc., to obtain extremely fine fibers. 200303384 In the present invention, a composite fiber made of two or more resins can be used as a split type composite fiber. The resin is, for example, a polyester polymer, a polyolefin polymer, a polyamide polymer, a polystyrene polymer, a polyacrylonitrile polymer, a polyvinyl alcohol polymer, or an ethylene-vinyl alcohol copolymer. For each component, one kind, or two or more kinds of polymers can be used, but it is not limited to these. Polyesters such as terephthalic acid, isophthalic acid, naphthalene-2,6-dicarboxylic acid, phthalic acid, α, β- (4-carboxyphenoxy) ethane, 4,4-dicarboxydiphenyl, 5 -Aromatic dicarboxylic acids such as sodium sulfoisophthalic acid; aliphatic dicarboxylic acids such as azelaic acid, adipic acid, sebacic acid or the like; ethylene glycol, diethylene glycol, 1 , 3-propanediol, 1,4-butanediol, 1,6-hexanediol, neopentyl alcohol, cyclohexane-1,4-dimethanol, polyethylene glycol, polytetramethylene glycol and other diols The formed fiber-forming polyester is preferably 80 mol% or more of the constituent units as the ethylene terephthalate unit. Polyamines, such as Nylon 6, Nylon 6, 6 and Nylon 12, are the main components of fats, polyacrylic acid fee, and semi-aromatic polyamines', which may also contain a small amount of polyamines. In addition, there is no particular limitation on the composite form of these resin components. For example, the arrangement of two types of resin components, such as a chrysanthemum fiber having a cross-sectional shape in which one component is radially distributed between the other components, has a layered structure in which the components interact with each other. The laminated bimetallic fiber having a cross-sectional shape has a sea-island type fiber in which one component is island-shaped dispersed in the other component. Among these split-type composite fibers, ultrafine fibers obtained from chrysanthemum-type fibers and bimetal fibers have sharp cross-section shapes and are easy to wipe dirt and oily dirt, so they are preferable. In addition, the present invention can also use hot-melt fibers. By using hot-melt fibers, the morphological stability can be improved when the nonwoven fabric is used as a wiper. At this time, the mixing ratio of 200303384 ultrafine fibers is more than 50%. If the mixing ratio is less than 50%, the wiping performance is not good. Especially when used for oil film dirt, the mixing ratio of the split type composite fiber is preferably 80% or more. In this case, as the heat-fusible fiber, a heat-fusible fiber composed of a single component may be used, and a heat-fusible composite fiber such as a connection type and a core-sheath type composed of two or more types of resin components containing a portion that has not been melted by heat treatment may be used In this case, it is preferable to maintain the fiber strength by not melting the portion. The melting point of the molten component is preferably not more than 10 ° C without melting the ultrafine fibers. The components of the hot-melt fiber are, for example, 6-resistant nylon / polyethylene, polypropylene / polyethylene, polypropylene / ethylene-vinyl acetate copolymer, polyester / polypropylene, polyester / polyethylene, 6-resistant nylon / 66 Nylon, high-density polyester / low-density polyester combinations are not limited by these. The non-woven fabric for a wiper of the present invention is one containing the above-mentioned ultrafine fibers, and is more preferably composed of 100% ultrafine fibers in terms of excellent ink wiping and softness. The fibers other than the ultrafine fibers used in the present invention are not particularly limited, and various synthetic fibers and natural fibers can be used. The method for manufacturing the non-woven fabric for wipes of the present invention is not particularly limited, and a fiber twill formed by a dry method or a wet method such as a card method, a suspension method, and a spunbond method can be used. The fiber twill is preferably a random twill, a semi-random twill, a parallel twill, or the like. Of these, in the present invention, it is preferable to mix the above-mentioned ultrafine fibers, heat-fusible fibers, and other fibers with cotton, and then to form a fiber twill by a card method or a suspension method. In addition, when the ultrafine fiber is produced by mechanically dividing the composite fiber, the composite fiber can be divided before the fiber twill is formed, or mechanical effects such as knitted perforation or water flow can be applied after the accumulation of 200303384 layers of twill.丨 Splitting and interweaving of composite fiber can make the fibers stronger, so it is better. The non-woven fabric for wipes of the present invention can wipe various dirt by having linear and / or dot-shaped adhesive areas and non-adhesive areas on the surface. In other words, in order to be able to wipe fine dirt such as oil film in non-adhesive areas, when rubbing attached stubborn dirt in the adhesive area, it exhibits excellent wiping performance for various dirt. In addition, the bonded area is harder than the non-adhesive portion by fixing part of the fibers, so it is easy to wipe stubborn dirt. In addition, workability is improved by having an adhesion area. In other words, by having a fixed and hard adhesive portion, debris appears on the non-woven fabric, which has a good grip feeling and is easy to handle when wiping. At the same time, the non-adhesive portion can maintain the softness of the non-woven fabric, so that the unevenness of the object to be wiped can be wiped according to the softness. It is extremely important that the bonded area is present at 10 to 80% of the surface area of the nonwoven fabric. If the adhesion area is more than 80%, the non-woven fabric becomes hard, the grip is not good, and the workability is not good. In addition, ultrafine fibers having an effective wiping effect for thin oil film dirt are finally buried in the resin, and the wiping property of the oil film becomes poor. In addition, if the adhesion area is less than 10%, the fibers are not easy to be fully fixed, the surface is fluffy, and it is unable to endure physical external impacts such as washing, which causes the non-woven fabric to collapse and tolerate repeated use. In terms of exhibiting superior wiping properties, surface fluff suppression effect, and washing durability, the adhesion area is preferably 10 to 50%, and more preferably 10 to 40%. The adhesive region of the present invention can be formed by using a resin adhesive, for example, an emulsion adhesive can be used. Binder resins such as acrylic resins, acrylate copolymer resins, polyurethane resins, epoxy resins, styrene-acrylic acid copolymer resins, and the like are not limited thereto. 200303384 There is no particular limitation on the method of forming the adhesive region, and for example, a method of transferring a resin adhesive by using an embossing roller or using a gravure. When a gravure is used in the present invention, a continuous linear pattern is preferred. For example, when the patterns shown in (1) to (III) are used, S is superior in terms of excellent wiping or creativity. In addition, by forming a structure in which the fibers are embedded in the bonded area, at least part of the non-bonded area of the non-woven fabric is formed, so as to obtain excellent washing and durability, so that the interval between adjacent bonded areas is 20 mm or less, preferably 10 mm. Below, the more preferable is an adhesion area of 8 to 2 mm. In addition, when forming the adhesion region in the present invention, a dot pattern as shown in the first (ΐν) φ to (V) may also be used. By using this pattern, the non-woven fabric can be made softer and the dirt wiping property such as oil film can be improved. Moreover, the adhesion area may be formed by mixing the above-mentioned linear pattern and dot pattern, and various patterns may be adopted depending on the purpose. The adhesive saturated in the thickness direction of the non-woven cloth for the rag is biased toward both sides of the non-woven cloth depending on the drying conditions after the adhesive resin coating, or evenly exists in the thickness direction. When both sides of the non-woven fabric are biased toward the adhesive resin or when uniform φ is present in the thickness direction, surface fluff can be suppressed, and sufficient washing durability can be obtained. When the adhesive at the bonded portion is biased toward the surface, the surface strength is increased and stubborn dirt is easily exhibited Wiping effect. At the same time, it feels soft and has a good grip, which can improve the unevenness of the wiping object, which corresponds to the soft wiping effect, so it is preferable. In addition, it is preferable that the nonwoven fabric for the present invention uses a non-woven fabric so that each fiber existing at least partially in the non-adhesive region is fixed by the adhesive region. In other words, the fibers existing in the non-adhesive area are embedded and fixed in the adhesive area, which can maintain a good feel or wiping property, and can suppress the fall of fine hairs, making a non-woven cloth with excellent cleaning durability. The non-woven fabric for a wiper of the present invention has the above-mentioned linear and / or dot-shaped adhesion areas. However, when it has excellent wiping properties and washing durability, the distance between adjacent adhesion areas is preferably 20 mm or less. It is 1 to 2 mm. If the distance between the bonding areas is greater than 20 mm, the dimension stability of the nonwoven fabric is reduced, and the washing durability is reduced. In addition, if the distance between the bonding areas is less than 2 mm, the feel of the non-woven fabric becomes hard. The distance between the bonding areas is preferably 8 to 2 mm in order to maintain the oil film wiping effect by the ultrafine fibers and obtain excellent washing durability. Moreover, the distance between the adhesive regions of the present invention is the shortest distance between adjacent adhesive regions, which can be obtained by measuring the shortest distance between the ends of the adhesive regions. The surface of the non-woven fabric for rags of the present invention can be smooth, and by having irregularities on the surface of the hole handle or the sheet, the wiping performance can be improved. In other words, the multiplication effect of the convex portion on the surface of the nonwoven fabric and the adhesion area can further exert the wiping performance. In addition, by having unevenness on the surface of the nonwoven fabric, the wiping property can be exhibited even when the object to be wiped has unevenness, and at the same time, extremely fine fibers easily appear on the surface of the nonwoven fabric, and it is easier to wipe fine dirt such as oil film. In addition, 'the method of making the non-woven surface embossed includes, for example, a mesh tree S, a net, a gold mesh, etc. as a carrier', placing a fiber twill thereon, and applying water flow to the twill surface to make the warp and weft of the mesh belt The knot height difference is transferred to the non-woven twill by water flow method, embossing roller method, etc. However, in the present invention, a relatively soft non-woven fabric can be made, and unevenness is easily left after washing. Water flow is better. In the non-woven fabric having unevenness, similarly, an adhesive region can be formed by an adhesive resin or the like. -12- 200303384 The unevenness of the present invention can be formed by the above method. For example, a non-woven fabric having a pattern shown in Fig. 2 can be used. When a non-woven fabric having unevenness is used in the present invention, the convex portion and the concave portion are preferably 20% or more of the thickness of the non-woven fabric. When the surface area of the non-woven fabric is increased by having a local step difference of 20% or more, the distance between the non-woven fabric and the dirt becomes longer, and it is easy to wipe. In addition, when physical protrusions are caused by the protrusions, they are easy to adhere and exhibit the wiping effect. In addition, depending on the dirt, the dirt can be retained in the recessed portion of the non-woven fabric to prevent re-staining. If the height difference is less than 20%, the surface of the non-woven fabric is flat, which is not easy to cause pollution, and it is not easy to exert the wiping performance, and the dirt once wiped is liable to re-contamination. In addition, in the present invention, it is more preferable that the convex portions existing on the surface of the non-woven fabric are formed through both the adhesive region and the non-adhesive region. In other words, since the convex portion is present in the adhesion area and the non-adhesion area, even if the object to be wiped is not smooth, it can exhibit excellent wiping properties and have better washing durability. In addition, by overlapping the convex portions with the bonding area, the dense portions of the fiber are hardened to exert the wiping performance of stubborn dirt. The non-woven cloth of the present invention uses the bonding area to control the fluff on the surface of the non-woven cloth as described above. After washing, the interwoven points of the fibers will be separated, and the woven form will not collapse, and can be reused. Further, when the ultrafine fibers having edges on the nonwoven fabric are used, there are advantages in that very fine dirt can be wiped off, and the fine dirt can easily enter the nonwoven fabric by removing the fine dirt. The non-woven cloth for rags of the present invention can be used for various rags, and can also be used to wipe off precious metals such as precious stones, food utensils, tables, glass, electrical products, furniture and the like. In addition, the rag obtained by the present invention is reusable due to its excellent washing durability and -13-200303384, which is extremely advantageous in terms of cost. (IV) Embodiments Implementation 仞 The present invention will be described in more detail by examples below, but the present invention is not limited by these examples. The properties of the materials in this example were measured by the methods described below. • Non-woven fabric thickness The thickness under a load of 12 gf / cm2 at 10 points was measured and the average thickness was determined. • The height difference of the unevenness of the non-woven fabric was measured using a CCD laser displacement sensor LK-2000 (manufactured by Chins Corporation). Further, the measurement was performed under no load, and the thickness of the 6-point high wave portion and the 6-point low wave portion were averaged, and the difference between the two averages was divided by the thickness of the high wave portion to obtain the height difference. Example 1 A split-type composite fiber having a cross-sectional shape in which 100% of Nylon 6 and polyethylene terephthalate are laminated alternately was made to 100% (WRA MP, manufactured by Clare Inc., fineness of 3.8 dte X, fiber length 5 1 mm) was supplied to the cutting machine to obtain a fiber twill. The obtained fiber twill was woven with a stream of water to divide it to be extremely fine, and the fibers were woven. After the water-interlacing treatment, a pattern with a coating area ratio of 13% was coated on the gravure alloy as shown in Figure 1 (adhesive pitch 3.2mm) and coated with 2g / m2 acrylic resin (Carbyton, Japan) (Made by the company) 'Non-woven cloth made of mesh 80 g / iir. When the obtained nonwoven fabric for a wiper was observed, there were a linear adhesive region and a non-adhesive region formed of an acrylic resin. When the nonwoven fabric was observed in more detail, it was confirmed that one end of the ultrafine fibers existing in the non-adhesive region was embedded in the adhesive region and fixed. Outside this -14-200303384, the distance between the bonding areas is 3.0 mm. The results are shown in Table 1. Example 2 The twill obtained in Example 1 was prepared in the same manner as in Example 1 except that the mesh pattern was transferred to the twill by water current interlacing on the net with the cedar pattern and had unevenness. The cloth is not woven. When the obtained nonwoven fabric for a wiper was observed, there were linear adhesive regions and non-adhesive regions formed of an acrylic resin. Furthermore, when the nonwoven fabric is observed in more detail, it can be confirmed that one end of the ultrafine fiber existing in the non-adhesive region is embedded in the adhesive region and is fixed. In addition, the distance between the 'adhesive regions' is 3.0 mm. (Table 1) Example 3 A split type composite fiber (85%) having a cross-sectional shape in which Lairon 6 and polyethylene terephthalate are laminated alternately (made by Claret, 1 ^? ^, Core-sheath composite adhesive fiber with a fineness of 3.8 (1161, fiber length 51111111) and 15% of polypropylene with a core component and polyethylene with a sheath component (NBF (H), 2.2dtex, 51mm manufactured by Raivab) ) After blending cotton and supplying it to the cutting machine, it is interwoven with water to divide it to be extremely fine. At the same time, the fibers are entangled to produce a non-woven fabric. Then heat treatment is performed to melt the binder fibers. In addition to using the obtained non-woven fabric, Example 2 A woven non-woven cloth with a mesh size of 8 Og / m2 was prepared in the same way. When the obtained non-woven cloth for the rag was observed, there was a linear adhesive region and a non-adhesive region formed by an acrylic resin. 3.0 mm. (Table 1) Comparative Example 1 A nonwoven fabric for a wiper with a mesh size of 8 Og / m2 was obtained in the same manner as in Example 2 except that the acrylic resin was not coated. (Table 1) Comparative Example 2 -15- 200303384 Coated with acrylic resin A non-woven cloth for wiping cloth having a mesh size of 80 g / m2 was prepared in the same manner as in Example 3. (Table 1). Comparative Example 3 40% of the cross-sectional shape of the laminated layer in which Nylon 6 and polyethylene terephthalate were laminated alternately Split composite fibers (2.2dtex fineness, 38mm fiber length) and 60% fineness 16.5 dt ex, polyethylene terephthalate fibers with a fiber length of 51mm are mixed with cotton and supplied to a cutting machine to produce fiber twill. The obtained fiber twill was adhered to the acrylic emulsion with a solid content of 15 g / m2 by a spray method, and then subjected to heat treatment at 150 ° C for 3 minutes to bond the fibers to each other to obtain a non-woven fabric for a rag. (Table 1) Table 1 Mesh (g / m2) Thickness (mm) Adhesive area (%) Uneven height difference (%) Example 1 80 0.54 13 15 Example 2 80 0.52 13 38 Example 3 80 0.51 13 33 Comparative example 1 80 0.57 0 41 Comparative example 2 80 0.54 0 39 Comparative example 3 150 2.6 100 10

The following non-woven fabrics were prepared using the nonwoven fabrics for wipers obtained in the above examples and comparative examples, and the following evaluations were performed. The results are shown in Table 2. • Evaluation of the fine hair dropping property 0.1 g of water was dripped on the mirror surface by weight, and a 15 cm corner rag was folded into 4 parts to hold it by hand, and it was drawn in a circular shape and wiped 10 times to observe the fine hair condition. The assessment is carried out in five stages. 5: Fine hairs have not fallen off. 16- 200303384 4 · 1 to 5 strips 3: 6 to 25 strips 2: 2 6 to 50 strips 1: 51 strips or more Based on the washing evaluation method of JIS L 1 096, washing was performed 5 times, and the change in shrinkage of the sample after washing was measured. In addition, the evaluation is based on the following three stages of changes in the shrinkage rate in the CD direction. φ 〇: Less than ± 3% △: ± 3% to 5% X: More than ± 5% • Evaluation of the oil film wipeability The glass plate is circularly filled with an oily ink plate. Fold the 15cm sample into 4 parts and hold it by hand to wipe the glass plate until the dirt is completely removed, and measure the number of wipes until the dirt is completely removed. • Evaluation of the wiping property of stubborn dirt φ After measuring the absorbance (A) of the glass plate, apply a "Mori" wiper (made by Sumitomo Lubricants) in a circular shape and dry it. After drying, the absorbance (B) was measured and placed in a rubbing fastness measuring machine. The sample with the moisture content adjusted to 1000% was mounted back and forth on the friction member once, and the absorbance after extraction was measured (C) ° The removal rate of dirt was measured by the following uncalculated formula. Removal rate = (C-B) / (A-B) X 1〇〇 • Evaluation of hand feel -17- 200303384 The grip feeling during wiping is evaluated in three stages. 〇: Soft grip feel △: Slightly grip feel X: Hard grip feel Table 2

Fine wool washing durable oil film wiping stubborn dirt wiping feel Example 1 5 〇9 56.4 〇Example 2 5 〇9 57.0 〇Example 3 5 〇8 51.2 〇 ~ △ Comparative Example 1 2 X 8 6.6 Δ Comparative Example 2 3 Δ 9 10.2 Δ Comparative Example 3 3 to 4 Δ 7 16.4 X As can be seen from Table 2, the rag made of the nonwoven fabric for the rag of the present invention has excellent wiping properties and washing durability. Effect of the invention

According to the present invention, a particularly excellent wiping effect can be achieved under any sweeping conditions such as oil film and stubborn dirt. In addition, it is possible to obtain a reusable rag that has a small amount of fine hairs, is excellent in washing durability, and is reusable. (V) Brief Description of the Drawings Figure 丨 is a schematic view of an example of a pattern of a gravure alloy that can be used in the present invention. Fig. 2 is a surface view of an example of a nonwoven fabric usable in the present invention. Explanation of symbols: A: Adhesive area B: Non-adhesive area -18-

Claims (1)

200303384 Patent application scope 1 · A non-woven cloth for wiping cloth is a non-woven cloth for wiping cloth containing ultrafine fibers, wherein the non-woven cloth surface has linear and / or dot-like bonding areas and non-bonding areas, and the bonding areas occupy the surface area of the non-woven 10% to 80%, and the distance between adjacent bonding areas is 20 mm or less. 2. The non-woven cloth for wipes as described in item 丨 of the patent application area, wherein unevenness is present on the surface of the non-woven fabric, and the height difference of the unevenness is more than 20% of the thickness of the non-woven fabric. 3. The non-woven cloth for wipes as described in item 1 or 2 of the patent application area, wherein the non-woven cloth is made of 100% ultrafine fibers. 4. A wiper 'is formed by using a non-woven cloth for wiper as described in any one of items 1 to 3 in the patent application area. -19-