JP2004510455A - Cleaning sheet to minimize residue remaining on the surface - Google Patents

Abstract

The cleaning sheet includes additives selected to enhance the pick-up and retention of particulate matter from the surface while minimizing the amount of residue remaining on the surface to be cleaned. If the type of additive and the level of additive on the cleaning sheet are not carefully selected, residues will remain on the surface to be cleaned of the sheet, resulting in unacceptable filming and streaking to the consumer. Occurs. The additives are preferably selected from the group consisting of waxes, oils and mixtures thereof.

Description

【００５８】
６．段階１および２を完了後に、モップヘッドを床から放して、注意深くそれを汚れ堆積物の上に直接載せる。中等度の圧力で、汚れ堆積物の上に押しつけ、持ち上げる。
７．化学天秤でクリーニング用シートを再計量し、シート重量を記録する。
８．次式を用いてデータを算定し、報告する：
シートピックアップ％＝（最終シート重量−初期シート重量）／１．０５ｇ×１００
この試験方法の結果（３回の反復の平均）を、下記の表１の「粒状物ピックアップ」の項目名の欄に示す。
以下は、本発明のクリーニング用シートの実施例であるが、これらに限定されない。
【００５９】
［実施例］
以下で、本発明のクリーニング用シートを例証する。表１は、例示的クリーニング用シートに関する「皮膜形成および条痕形成に関する残留物試験」、ならびに「粒状物ピックアップ性能試験」の結果を提示する。
【００６０】
実施例シートＡ
本実施例は、図２の略図に示したようなクリーニング用シートの製造方法を説明する。この過程中、幅２１０ｍｍおよび坪量３０ｇ／ｍ^２のポリプロピレン製の連続一次ウェブ３１０は、略図に示したように左から右に連続的に供給される。同時に、各々２〜３０デニールの２，０００〜１００，０００のポリエステル連続フィラメント３１５の束で構成されるトウ３１２は、図に示したように左から右に連続的に供給される。トウ３１２は、一組の延長ロール３１１により開かれるか、または繊維化されて、所望の幅を有する連続二次ウェブを形成し、その後、一次ウェブ３１０上に置かれる。一次ウェブ３１０および二次ウェブ３１２は、加熱型押し機３２０に送られて、そこでそれらは加熱下で一緒に圧縮され、一緒に一体的にヒートシールされ、それにより横切って延びるヒートシール線３１６を形成して、連続複合三次ウェブ３２１を形成する。ヒートシール線３１６は、三次ウェブの縦方向に測定して距離ｄだけ、一方をもう一方から間隔をあけるように、即ち三次ウェブ３２１の縦方向に間欠的に整列されるよう提供される。その後、二次ウェブ３１２は、隣接ヒートシール線３１６の各対に平行に、その間を延びる中線に沿って第一切断機３２５によって２つに切断される。次に一次ウェブ３１０が第二切断機３２６で所望の長さに切断される。このようにして、個々のクリーニング用シート１が三次ウェブ３２１から得られる。この過程では、個々のベースシート１０は、一次ウェブ３１０から得られ、刷毛状フィラメント１１は二次ウェブ３１２から得られ、刷毛状フィラメント１１の個々のフィラメント１５は連続フィラメント３１５から得られ、そして定着部分１６はヒートシール線３１６により提供される。好ましくは、ヒートシール線３１６の各々は２〜１０ｍｍの幅を有し、２０〜２００ｍｍの距離だけ隣接ヒートシールから離れている。刷毛状フィラメント１１または二次ウェブまたはトウ３１２は、これらの刷毛状フィラメント１１の形成前に、本過程の適切な段階で表１中に記載したような添加剤を塗られる。第二切断機３２６により切断される一次ウェブ３１０のセクションでは、隣接ヒートシール線３１６の各対間の距離Ｄは、相対的に大きい辺縁領域７を得るために距離ｄより長い寸法にされて、クリーニング用シート１をホルダー２上に載せ易くする。この場合、距離Ｄにより互いに間隔を置いた２つの隣接ヒートシール線の間に画定されるセクションは、相対的に長い刷毛状フィラメント１１を必然的に提供し、これらの刷毛状フィラメント１１は残りの刷毛状フィラメント１１に応じた長さに切断されねばならない。図示した方法によれば、定着部分１６から垂れ下がる各フィラメント１５の長さは、距離ｄの約１／２に対応する。所望により、隣接ヒートシール線３１６の各対間に限定された一次ウェブ３１０のセクションに供給される二次ウェブ３１２の長さは、距離ｄの１／２より長いフィラメント１５を得るために、距離ｄより長い寸法にされ得る。
この方法から得られるクリーニング用シートを、図５に示す。
【００６１】
実施例シートＢ
本実施例は、本発明の水流絡合化クリーニング用シートを製造するためのカード処理ウェブおよびスクリム（即ちポリプロピレンフィラメントの網状構造）の組合せを説明する。間にスクリムを有する２つのカード処理ポリエステル繊維ウェブを調製する。次に２つのカード処理ウェブおよびスクリムの組合せを、開口形成ベルト（２３Ｃ矩形波。Ａｌｂａｎｙ Ｉｎｔｅｒｎａｔｉｏｎａｌ， Ｅｎｇｉｎｅｅｒｅｄ Ｆａｂｒｉｃｓ Ｄｉｖｉｓｉｏｎ， Ａｐｐｌｅｔｏｎ， ＷＩから入手可能）の上部に載せて、水流絡合化し、乾燥する。絡合法は、繊維を絡み合わせ、繊維を離して動かしながらスクリムとも絡み合わさせ、２つの個別坪量領域を提供する。乾燥段階中、水流絡合化シートは、ポリエステル不織布に比してポリプロピレンスクリムが縮む結果として、「キルト化」するようになる（即ち、より大きい三次元性が達成される）。次に不織布クリーニング用シートを、表１に記載した添加剤で被覆する。
【００６２】
好ましい任意段階として、絡み合った不織布シートに、例えば成形機で１８０℃で１０秒間、さらに加熱を施し得る（この加熱は表面処理の前または後に実施され得るが、好ましくは添加剤の適用前に実行される）。これは、三次元性のさらなる強化さえも提供する。
この方法から得られるクリーニング用シートを、図７および８に図示する。
【００６３】
【表２】

^１クリーニング用シートの総集合体坪量。
【００６４】
上記結果は、クリーニング用シートに適用される添加剤の種類およびレベルの選択が、クリーニング用シートにより拭われた表面に残存する視覚的残留物の量を最小限にしながらクリーニング用シートの粒状物ピックアップを改良するために重要であることを示す。
【図面の簡単な説明】
【図１】本発明の熱接着クリーニング用シートの第一の実施形態を示す透視図である。
【図２】図１の線ＩＩＩ−ＩＩＩに沿って得られる断面図である。
【図３】図１により示された実施形態とは異なるクリーニング用シートの第二の実施形態を示す斜視図である。
【図４】図１により示された実施形態とは異なるクリーニング用シートの第三の実施形態を示す斜視図である。
【図５】刷毛状フィラメントを包含するクリーニング用シートの第四の実施形態を示す斜視図のデジタル写真である。
【図６】図５に示したようなクリーニング用シートの製造方法を説明する略図である。
【図７】本発明の水流絡合化クリーニング用シートの写真（倍率１２倍）であり、これは高坪量連続領域および複数の低坪量個別領域を示す。
【図８】シートの坪量差の考察を促すために、図７に示した水流絡合化クリーニング用シートの平面図である。[0001]
[Technical field]
The present invention relates to a cleaning sheet particularly suitable for removing and taking in dust, lint, hair, sand, food debris, glass and the like.
[0002]
[Background of the Invention]
The use of dry dust cleaning nonwoven sheets is well known in the art. Such sheets typically utilize a composite of fibers, where the fibers are typically bonded by an adhesive, entanglement, or other force. See, for example, U.S. Patent Nos. 3,629,047 and 5,144,729. Reinforcing means have been combined with staple fibers in the form of continuous filaments or networks to provide a durable wiping sheet. See, for example, U.S. Patent Nos. 4,808,467, 3,494,821, and 4,144,370. In order to further provide a product that can withstand the rigors of the wiping process, conventional nonwoven sheets have used fibers that have been strongly bonded by one or more of the foregoing. Such cleaning sheets are described in European patent applications EP 774,229 A2 and EP 777,997 A2 which utilize continuous filaments which are bonded to a base sheet via a heat seal line. A durable material is obtained, but such a strong bond can adversely affect the material's ability to pick up and retain particulate soil. In an effort to address this problem, additives consisting of mineral oil have been applied to such cleaning sheets at relatively high levels (ie, levels greater than 5% by weight of the cleaning sheet). However, mineral oil additives, when applied to such cleaning sheets at such high levels, tend to leave unpleasant residues on surfaces that are wiped with such cleaning sheets, which is a concern for consumers. Is not acceptable.
[0003]
U.S. Patent No. 5,599,550 (Kohlruss et al., Issued February 4, 1997) describes a biodegradable wax impregnated dust cloth. However, the dust cloth disclosed by Kohlruss utilizes natural fibers and relatively high levels of wax, both of which contribute to eliminating the dust cloth's electrostatic properties.
[0004]
Therefore, a cleaning sheet that has the ability to effectively pick up and retain particulate soil while maintaining the electrostatic properties of the cleaning sheet and minimizing the amount of residue remaining on the surface wiped with such a cleaning sheet. It was the desire of those skilled in the art to develop a sheet for use. Further, it has been required to develop a cleaning method for improving the cleaning performance of the cleaning sheet.
[0005]
[Summary of the Invention]
The present invention removes and retains particulate matter such as dust, lint, hair, sand, food debris, glass, etc. from the surface while minimizing the amount of residue remaining on the surface after wiping with a cleaning sheet. To a cleaning sheet for cleaning. The cleaning sheet of the present invention was selected in its type and level to improve the cleaning sheet's ability to pick up and retain particulate matter while minimizing residue remaining on the surface. Contains additives. The additives are preferably selected from the group consisting of waxes, oils and mixtures thereof. A wax-only additive or an oil-only additive may be used, but a preferred additive is a mixture of wax and oil.
[0006]
The cleaning sheet of the present invention typically has at least about 20 g / m2. ² , Preferably at least about 40 g / m ² , More preferably at least about 60 g / m ² Has a total aggregate basis weight of The total basis weight of the cleaning sheet of the present invention is typically about 275 g / m2. ² Or less, preferably about 200 g / m ² Or less, more preferably about 150 g / m ² It is as follows.
[0007]
The cleaning sheet of the present invention may be formed by using a woven or non-woven process, or by a molding operation using a fusible substance laid on a formed body, especially a belt-shaped formed body, and / or a film. It can be manufactured by a molding operation that includes mechanical operations / modifications performed above. The structure can be made by any of a number of methods (e.g., spun bonding, melt blowing, resin bonding, thermal bonding, air through bonding, etc.) provided the desired characteristics are known. However, preferred structures provide non-woven fabrics, especially those that are made by hydroentanglement and / or thermal bonding, as is well known in the art, as they provide a highly desirable open structure. It is. Accordingly, a preferred cleaning sheet is a non-woven structure having the features described herein. Materials that are particularly suitable for forming the preferred nonwoven cleaning sheets of the present invention include, for example, synthetics such as polyolefins (eg, polyethylene and polypropylene), polyesters, polyamides, and blends thereof. Also useful are natural fibers, such as natural celluloses, such as cotton or blends thereof, and those obtained from various cellulosic sources such as synthetic cellulosic materials (eg, Rayon®), however, these are preferably Absent. Preferred starting materials for making the cleaning sheets of the present invention are synthetic materials which may be in the form of carding, spun bonding, melt blowing, air laid or other structures. Cleaning sheets comprising synthetic materials or fibers typically have desirable electrostatic properties, which are preferred. Particularly preferred are polyesters, especially carded polyester fibers. The degree of hydrophobicity or hydrophilicity of the fibers is optimized according to the desired purpose of the sheet with respect to the type of soil removed, the type of additive provided, the biodegradability, the availability and the combination of such requirements Is done. In general, biodegradable materials are more hydrophilic, but more effective materials tend to be hydrophobic.
[0008]
The present invention also includes a cleaning tool including the handle and the cleaning sheet of the present invention.
The present invention further relates to an improved cleaning method that includes a "stamping" step, as well as products containing informational indicators conveying such a method.
[0009]
[Detailed description of the invention]
I. Definition
As used herein, the term "comprising" means that the various components, ingredients, or processes can be used jointly in the practice of the present invention. Thus, the term "comprising" encompasses the more restrictive terms "consisting essentially of" and "consisting of."
As used herein, the term "hydroentanglement" generally refers to a layer of open fibrous material (e.g., polyester) supported on an apertured pattern member and mechanically separating individual fibers. A method of making a material that is subjected to a water pressure difference large enough to provide a fabric that is entangled. The aperture pattern member can be formed, for example, from a woven screen, a perforated metal plate, or the like.
[0010]
As used herein, the term "Z dimension" refers to a dimension orthogonal to the length and width of the cleaning sheet of the present invention or its components. The Z dimension usually corresponds to the thickness of the sheet.
As used herein, the term "XY dimension" refers to a plane perpendicular to the thickness of the cleaning sheet or its components. The X and Y dimensions, respectively, typically correspond to the length and width of the sheet or sheet component.
[0011]
As used herein, the term “layer” refers to a member or component of a cleaning sheet whose major dimension is XY, ie, along its length and width. It should be understood that the term layer is not necessarily limited to a single layer or sheet of material. Thus, a layer may comprise a laminate or combination of several sheets or webs of the required type of material. Thus, the term “layer” includes the terms “layers” and “layered”.
[0012]
For purposes of the present invention, the "top" layer of the cleaning sheet is relatively further away from the surface to be cleaned (i.e., in the tool context, relatively closer to the handle of the tool during use). Layer. The term "lower" layer refers to the layer of the cleaning sheet that is relatively closer to the surface to be cleaned (i.e., in the tool context, relatively further away from the handle of the tool during use).
[0013]
As used herein, the term "total aggregate basis weight" refers to the average basis weight of all cleaning sheets when viewed as a whole sheet.
All percentages, ratios and proportions used herein are by weight unless otherwise indicated. All references cited are incorporated herein by reference unless otherwise indicated.
[0014]
II. Cleaning sheet
The present invention includes a cleaning sheet that includes additives selected to enhance the pickup and retention of particulate matter from the surface while minimizing the amount of residue remaining on the surface being cleaned. . If the type of additive and the level of additive on the cleaning sheet are not carefully selected, the sheet will leave residue on the surface being cleaned, resulting in surface filming and streaking that is unacceptable to the consumer. .
[0015]
The cleaning sheet of the present invention typically has at least about 20 g / m2. ² , Preferably at least about 40 g / m ² , More preferably at least about 60 g / m ² Has a total aggregate basis weight of The total aggregate basis weight of the cleaning sheet of the present invention is typically about 275 g / m2. ² Or less, preferably about 200 g / m ² Or less, more preferably about 150 g / m ² It is as follows.
[0016]
The cleaning sheet of the invention can be carried out using a woven or non-woven process or on a forming body, in particular by a molding operation using a fusible substance laid on a belt-like forming body, and / or on a film. Can be produced by a molding operation that includes mechanical operation / modification. The structure can be made by any number of methods (e.g., spun bonding, melt blowing, resin bonding, thermal bonding, air through bonding, etc.) if the desired characteristics are known. However, preferred structures are nonwovens, particularly those formed by hydroentanglement and / or thermal bonding, as is well known in the art, to provide a highly desirable open structure. Accordingly, a preferred cleaning sheet is a nonwoven structure having the features described herein. Materials that are particularly suitable for forming the preferred nonwoven cleaning sheets of the present invention include, for example, natural cellulosic materials and synthetics, such as polyolefins (eg, polyethylene and polypropylene), polyesters, polyamides, synthetic cellulosic materials (eg, Rayon (registered trademark)) and blends thereof. Natural fibers, such as cotton or blends thereof, and those obtained from various cellulosic sources are also useful, however, they are not preferred. Preferred starting materials for the manufacture of the cleaning sheet of the present invention are synthetic materials which may be in the form of carding, spun bonding, melt blowing, air laid or other structures. Cleaning sheets comprising synthetic materials or fibers typically have desirable electrostatic properties, which are preferred. Particularly preferred are polyesters, especially carded polyester fibers. The degree of hydrophobicity or hydrophilicity of the fibers depends on the type of soil to be removed, the type of additive provided, the biodegradability, the availability and any combination of such requirements and the desired purpose of the sheet. Optimized by In general, biodegradable materials are more hydrophilic, but more effective materials tend to be hydrophobic.
[0017]
The cleaning sheet may be formed from a single fibrous layer, but is preferably a composite of at least two separate layers. As noted above, preferred cleaning sheets in the present invention include various cleaning sheet structures, such as, for example, thermal adhesive cleaning sheets and / or hydroentangled cleaning sheets.
[0018]
The cleaning sheet of the present invention contains an additive. The type and level of additive will maintain the electrostatic properties of the cleaning sheet and minimize the residue remaining on the surface that is wiped by the cleaning sheet, while effectively picking up and retaining particulate matter Is selected to be included in the cleaning sheet.
[0019]
Cleaning sheets useful in the present invention include co-pending U.S. patent application Ser. No. 09 / 082,349 (Fereshtekhhou et al., Filed May 20, 1998 (case 6664M)); No. 082,396 (Fereshtehkou et al., Filed May 20, 1998 (case 6798M)); US Pat. No. 5,525,397 (Shizuno et al., Issued June 11, 1996); European Patent Application No. 774,229A2. (Published May 21, 1997), European Patent Application No. 777,997A2 (published June 11, 1997), and JP09-224,895 (published September 2, 1997), JP09-313,416. (Released on December 9, 1997) (all of these descriptions are incorporated herein by reference. Include those described in the), but not limited thereto.
[0020]
A. Preferred thermal adhesive cleaning sheet
Preferred thermoadhesive cleaning sheets of the present invention have at least two distinct regions, preferably of different basis weights. In a preferred embodiment, the cleaning sheet of the present invention has two separate areas of different basis weights, and a first basis weight area with a relatively high basis weight and a second basis weight with a relatively low basis weight. Region. The first region of relative high basis weight is typically at least about 80 g / m ² , Preferably at least about 130 g / m ² , More preferably at least about 170 g / m ² And even more preferably at least about 200 g / m ² And typically about 300 g / m ² Or less, preferably about 275 g / m ² Or less, more preferably about 250 g / m ² Below, even more preferably about 240 g / m ² The following basis weights are shown. This first region of relative high basis weight is preferably located at the center of the cleaning sheet in the Y dimension, as shown in FIG. The first region of relatively high basis weight typically comprises at least 30%, preferably at least about 40%, more preferably at least about 45%, and even more preferably at least about 50% of the area of the cleaning sheet. Occupy. This first region of relative high basis weight is typically less than about 90%, preferably less than about 80%, more preferably less than about 70%, even more preferably less than about 60% of the area of the cleaning sheet. Also occupies: The cleaning sheet also has a second region, preferably of relatively low basis weight, which is typically divided between both sides of the sheet as shown in FIG. Is less than about 70%, preferably less than about 60%, more preferably less than about 55%, even more preferably less than about 50%, and typically at least about 10%, preferably at least about 20%, Preferably at least about 30%, and even more preferably at least about 40%. In another aspect of the invention, there is only one gross (macroscopic) basis weight region that includes a higher basis weight material.
[0021]
The cleaning sheet of the present invention preferably includes brush-like filaments as illustrated in the cleaning sheet illustrated in FIG. 5 and as illustrated in the process illustrated in FIG. The brush-like filaments are attached to a cleaning sheet to help pick up and retain particulate matter. The brush-like filaments are preferably formed from a bundle of polyester continuous filaments.
For cleaning sheets for use with the handle as described herein, areas of relatively high basis weight are preferably in a typical cleaning method by wiping the surface with a cleaning sheet. The relatively high basis weight area is placed on the sheet so that it contacts the surface to be cleaned. The region of relatively low basis weight is preferably arranged on the sheet such that the region of relatively low basis weight is engaged with the holding means / holding means arranged at the head of the handle.
[0022]
Method for producing preferred heat-adhesive cleaning sheet
A method of making a thermoadhesive cleaning sheet useful in the present invention is illustrated in FIG. During this step, a width of 210 mm and 30 g / m ² A continuous primary web 310 made of polypropylene having a basis weight of is supplied continuously from left to right as shown schematically. At the same time, the tow 312, comprising a bundle of 2,000-100,000 polyester continuous filaments 315, each of 2-30 denier, is fed continuously from left to right as shown. The tow 312 is opened by a set of extension rolls 311 and fibrillated to form a continuous secondary web having a desired width, and then laid on the primary web 310. The primary web 310 and the secondary web 312 are sent to a heated stamper 320, where they are compressed together under heating, and along a transversely extending heat seal line 316 formed thereby, together. To form a continuous composite tertiary web 321. The heat seal lines 316 are provided to be spaced apart from each other by a distance d measured in the longitudinal direction of the tertiary web, ie, to be intermittently aligned in the longitudinal direction of the tertiary web 321. Thereafter, the secondary web 312 is cut in two by a first cutter 325, parallel to each pair of adjacent heat seal lines 316 and along a midline extending therebetween. Next, the primary web 310 is cut to a desired length by a second cutter 326. In this way, individual cleaning sheets 1 are obtained from the tertiary web 321. In this step, the individual base sheets 10 are obtained from the primary web 310, the brush-like filaments 11 are obtained from the secondary web 312, the individual filaments 15 of the brush-like filaments 11 are obtained from the continuous filaments 315, and are fixed. Portion 16 is provided by heat seal wire 316. Preferably, each of the heat seal lines 316 has a width of 2-10 mm and is spaced from adjacent heat seal lines by a distance d of 20-200 mm. Prior to formation of these brush-like filaments 11, the brush-like filaments 11 or secondary webs or tows 312 may be sprayed or rolled with additives as described herein in a suitable course of the process. Is done. In the section of the primary web 310 cut by the second cutting machine 326, the distance D between each pair of adjacent heat seal lines 316 is dimensioned to be longer than the distance d so that the cleaning sheet 1 is placed on the holder 2. A relatively large peripheral area 7 that can be easily mounted may be obtained. In this case, the section defined between two adjacent heat-sealing lines spaced apart from each other by a distance D necessarily provides a relatively long brush-like filament 11, which brush-like filament 11 remains. It must be cut to a length corresponding to the brush filament 11. According to the illustrated method, the length of each filament 15 depending from the anchoring portion 16 corresponds to about 1/2 to about 9/10 of the distance d. If desired, the length of the secondary web 312 supplied to the section of the primary web 310 defined between each pair of adjacent heat seal lines 316 may be adjusted to obtain a filament 15 that is longer than 1/2 of the distance d. It can be dimensioned to be longer than the distance d.
[0023]
In the method for producing a heat-adhesive cleaning sheet according to the present invention, the particular type of material used as the base sheet 10 and the brush-like filaments 11 is not critical as long as they can be heat-sealed to one another. However, it is generally preferred to use a thermoplastic synthetic resin as the material for these components. Further, the primary web 310 and the secondary web 312 made of thermoplastic synthetic resin may be mixed with non-heat-sealable filaments such as rayon as long as they do not exceed 20% by weight. Such non-heat-sealable filaments are embedded in and fixed to the heat-sealed material along respective heat-sealing lines 316. Further, for non-woven fabrics as the primary web 310, a continuous plastic film can be used.
[0024]
The method comprises the steps of: heat-sealable filaments and a tow or web comprising a heat-sealable base sheet are heat-sealed together, after which the tow or web is cut transversely to form a brush on said cleaning sheet. Since the filaments are formed, the density of brush-like filaments implanted on the base sheet can easily be improved by simply increasing the number of filaments making up the tow and web.
[0025]
Preferred hydroentangled sheet
Hydroentangled cleaning sheets are particularly useful in the present invention because of their ability to effectively pick up and retain particulate matter from surfaces. The hydroentangled cleaning sheet can be a woven or nonwoven fabric, however, the preferred hydroentangled sheet of the present invention is a nonwoven fabric.
[0026]
The present invention encompasses a wide variety of structures for hydroentangled cleaning sheets. The cleaning sheet may have a relatively uniform basis weight throughout the area of the sheet, or the cleaning sheet may have discrete areas of different basis weights. Further, the cleaning sheet may have a relatively flat surface, or the cleaning sheet may exhibit macroscopic three-dimensionality.
[0027]
To enhance the integrity of the hydroentangled cleaning sheet of the present invention, the fibrous material is aligned by hydroentanglement, for example, by lamination via chemical means such as heat or an adhesive. It preferably includes a polymeric net (referred to herein as a "scrim" material). Scrim materials useful herein are described in detail in U.S. Pat. No. 4,636,419, which is incorporated herein by reference. The scrim may be formed directly in an extrusion die or may be obtained from an extruded film by fiberization or by embossing and subsequent drawing or splitting. The scrim can be obtained from a polyolefin such as polyethylene or polypropylene, copolymers thereof, poly (butylene terephthalate), polyethylene terephthalate, nylon 6, nylon 66, and the like. Scrim materials are available from various commercial sources. A preferred scrim material useful in the present invention is a polypropylene scrim available from Conwed Plastics (Minneapolis, MN).
[0028]
Suitable hydroentangled cleaning sheets for the present invention include co-pending U.S. patent application Ser. No. 09 / 082,349 (Fereshtehkou et al., Filed May 20, 1998 (case 6664M)). No. 09 / 082,396 (Fereshtehkou et al., Filed May 20, 1998 (case 6798M)) and US Pat. No. 5,525,397 (Shizuno et al., Issued June 11, 1996). Things.
[0029]
i. Any weight
The hydroentanglement cleaning sheet useful in the present invention can have at least two regions distinguished by basis weight. In particular, the cleaning sheet has a weight of about 30 to about 120 g / m2. ² (Preferably about 40 to about 100 g / m ² , More preferably about 50 to about 90 g / m ² And even more preferably from about 60 to about 80 g / m ² )), And may include one or more high basis weight regions and one or more low basis weight regions, where the low basis weight region (s) has a high basis weight It has a basis weight that is no more than about 80% of the basis weight of the region (s). Preferred cleaning sheets in this regard include a continuous high basis weight area and a plurality of discontinuous areas surrounded by the continuous high basis weight area, wherein the discontinuous areas are arranged in a non-random repeating pattern. And has a basis weight of about 80% or less of the basis weight of the continuous region.
[0030]
Preferably, the low basis weight area (s) of the cleaning sheet is about 60% or less, more preferably about 40% or less, even more preferably about 20% or less of the basis weight of the high basis weight area (s). % Basis weight. The cleaning sheet preferably has a weight of about 20 to about 110 g / m2. ² , More preferably about 40 to about 100 g / m ² And even more preferably from about 60 to about 90 g / m ² Of the aggregate. For the low basis weight region (s), the basis weight is preferably non-zero in such regions so that a macroscopic opening is present. This is because dirt can completely penetrate into the cleaning sheet and is not retained there. In other words, the confinement level of the sheet is not optimized in such a situation.
[0031]
In embodiments where the continuous high basis weight area surrounds the individual low basis weight areas, it is preferred that at least about 5% of the total surface area of the cleaning sheet is the low basis weight area. Even more preferably, at least about 10%, even more preferably at least about 15%, even more preferably at least about 20%, and even more preferably at least about 30% of the total surface area of the cleaning sheet is a low basis weight region. In embodiments where the individual high basis weight areas are surrounded by continuous low basis weight areas, it is preferred that at least about 5% of the total surface area of the cleaning sheet is the individual high basis weight areas. Even more preferably, at least about 10%, even more preferably at least about 15%, even more preferably at least about 20%, even more preferably at least about 30% of the total surface area of the cleaning sheet is the high basis weight area.
[0032]
In preferred embodiments having a continuous high basis weight area surrounding the individual low basis weight areas, the individual low basis weight areas may be staggered or aligned in either or both the X and Y directions. Preferably, the high basis weight, essentially continuous network forms a patterned network around the individual low basis weight regions, but as noted, smaller transition regions may be accommodated.
[0033]
There may be a small transition region having a basis weight intermediate between the basis weight of the high basis weight region (s) and the basis weight of the low basis weight region (s), which transition region is itself a It will be apparent to those skilled in the art that the area need not be significant enough to be considered as constituting a basis weight that can be distinguished from the basis weight of any adjacent region. Such transition areas are within known and inherent normal manufacturing changes in the manufacture of structures according to the present invention. Within a given area (whether high or low basis weight), if such a given area is considered to have a certain basis weight, normal and predicted basis weight fluctuations and changes occur. It will be understood that it is good. For example, at the microscopic level, if the basis weight of the gap between the fibers is measured, an apparent basis weight of zero occurs, in which case the basis weight of such a region is actually greater than zero. Again, such variations and modifications are a normal and expected result of the manufacturing process.
[0034]
FIG. 7 is a photograph of a portion of a preferred nonwoven sheet of the present invention having a continuous high basis weight area surrounding an individual low basis weight area. Although not numbered, the high basis weight continuous area looks like a bright net-like structure, and the low basis weight area is a dark individual area. FIG. 8 is a plan view of a portion of the nonwoven sheet 10 to further depict this aspect of the sheet shown in FIG. In particular, in FIG. 8, the nonwoven sheet 10 has a continuous high basis weight area 12 and individual low basis weight areas 14. In this representative illustration, any scrim material is not shown. Although the low basis weight regions 14 are illustrated as being essentially the same size and having a single well-defined shape, these regions are different to facilitate the incorporation of particles of various sizes and shapes. It may be of a size. Further, it will be appreciated that the shape of the low basis weight region 14, and thus the shape of the continuous high basis weight region 12, may vary throughout the structure.
[0035]
A basis weight difference between the high and low basis weight regions 12 and 14 of at least 20% (within the same structure 10) is considered significant and defines another region for the purposes of this disclosure. No. 5,277,761 (Phan et al.) For quantitative determination of basis weight in each of regions 12 and 14, and therefore for quantitative determination of the basis weight difference between such regions 12 and 14. , Issued January 11, 1994), which is incorporated herein by reference, may employ quantitative methods such as soft X-ray image analysis as disclosed. This method is also applicable where high and low basis weight areas are not aligned in a continuous / separate pattern.
[0036]
The relative areas of the low basis weight region and the high basis weight region are described in co-pending U.S. patent application Ser. No. 09 / 082,349 (Fereshtehkhou et al., Filed May 20, 1998 (case no. 6664M)). , Quantitatively measured using image analysis techniques as described in US Pat.
[0037]
ii. Arbitrary macroscopic three-dimensionality
In one embodiment, the cleaning sheet is also visually three-dimensional. These sheets are preferably of a relatively open construction, for example as compared to paper towels. In one such preferred embodiment, the macroscopic three-dimensional cleaning sheet has a first surface and a second surface and includes a scrim or other contractile material. In one such preferred embodiment, the cleaning sheet has a first outer surface and a second outer surface and includes a shrinkable (preferably scrim) material, wherein the average of at least one outer surface is The vertex-to-vertex distance is preferably at least about 1 mm, and the surface (s) of the surface (s) is preferably from about 0.01 to about 5. Methods for measuring average vertex-to-vertex distance and average height difference are described in co-pending U.S. patent application Ser. Are hereby incorporated by reference).
[0038]
Regardless of the shape of the cleaning sheet, the average vertex-vertex distance of the at least one outer surface is preferably at least about 1 mm, more preferably at least about 2 mm, and even more preferably at least about 3 mm. In one embodiment, the average vertex-vertex distance is about 1 to about 20 mm, especially about 3 to about 16 mm, and more particularly about 4 to about 12 mm. The surface topography index of the at least one outer surface is preferably from about 0.01 to about 10, preferably from about 0.1 to about 5, more preferably from about 0.2 to about 3, and even more preferably from about 0.1 to about 3. 3 to about 2. The at least one exterior surface preferably has an average height difference of at least about 0.5 mm, more preferably at least about 1 mm, and even more preferably at least about 1.5 mm. The average height difference of the at least one outer surface is typically from about 0.5 to about 6 mm, more typically from about 1 to about 3 mm.
C. Other cleaning sheets
Other cleaning sheets useful in the present invention include spun bonded, melt blown and air laid.
[0039]
D. Additive
The cleaning performance of any of the cleaning sheets of the present invention can be improved by treating the sheet fibers with any of a variety of additives (including surfactants or lubricants) that enhance the adhesion of dirt to the sheet, especially at the surface. Processing can further enhance. When utilized, such additives are added to the cleaning sheet at a level sufficient to enhance the sheet's ability to deposit dirt. However, the level and type of additive must be selected to minimize the amount of residue remaining on the surface cleaned by the cleaning sheet. Such additives are preferably at least about 0.01% by weight, more preferably at least about 0.1% by weight, more preferably at least about 0.5% by weight, even more preferably at least about 1% by weight, even more so. Preferably applied to the cleaning sheet at an additional level of at least about 3% by weight, even more preferably at least about 4% by weight. Typically, the level of addition is from about 0.1 to about 25%, more preferably from about 0.5 to about 20%, more preferably from about 1 to about 15%, even more preferably from about 0.1 to about 25% by weight of the dry cleaning sheet. About 2 to about 10%, even more preferably about 4 to 8%, and most preferably about 4 to 6%. The level and type of additive must be carefully selected to minimize residues left on surfaces wiped with the cleaning sheet of the present invention and leave a visually acceptable surface for the consumer.
[0040]
Preferred additives are waxes or mixtures of oils such as mineral oils and waxes. Suitable waxes include various types of hydrocarbons, as well as esters of certain fatty acids (eg, saturated triglycerides) and fatty alcohols. They can be obtained from natural sources (ie, animals, plants or minerals) or can be synthetic. Mixtures of these various waxes can also be used. Some representative animal and vegetable waxes that can be used in the present invention include beeswax, carnauba wax, spermaceti, lanolin, shellac wax, candelilla wax, and the like. Representative waxes from mineral sources that can be used in the present invention include petroleum based waxes such as paraffin, petrolatum and microcrystalline wax, and fossil or ground waxes such as white ceresin wax, yellow ceresin wax, white ozokerite wax And the like. Representative synthetic waxes that can be used in the present invention include ethylene-based polymers, such as polyethylene wax, chlorinated naphthalenes, such as "Halowax," which is a hydrocarbon-type wax manufactured by Fischer-Tropsch synthesis. Other preferred additives are provided as a mixture of a wax and an oil, such as petrolatum. Such additives may be used on their own or in combination with other waxes and oils.
[0041]
Preferred additives are waxes and mineral oils, as they enhance the cleaning sheet's ability to pick up and retain particulate matter from the surface while minimizing the amount of residue remaining on the surface that is wiped with the cleaning sheet Is a mixture of If a mixture of inorganic oil and wax is utilized, the component is preferably oil to wax, from about 1:99 to about 7: 3, more preferably from about 1:99 to about 3: 2, and even more preferably about 1: 99 to about 3: 2. It is mixed in a weight ratio of 1:99 to about 2: 3. In a particularly preferred embodiment, the oil to wax ratio is about a 1: 1 weight ratio and the additives are applied at an additional level of about 5% by weight. A preferred mixture is a 1: 1 mixture of mineral oil and paraffin wax.
[0042]
Wax alone, for example paraffin wax, can be utilized as an additive to the cleaning sheet of the present invention. If wax is the only additive, the cleaning sheet is preferably composed of synthetic fibers so that the cleaning sheet can still maintain electrostatic properties and provide enhanced particulate pickup and retention. In any case, if the cleaning sheet comprises natural and / or synthetic fibers, the additive consisting essentially of wax will typically comprise no more than about 4%, preferably about 3%, by weight of the cleaning sheet. Below, more preferably at an additional level of about 2% or less, even more preferably about 1% or less, applied to the cleaning sheet of the present invention. If the wax additive is applied to the cleaning sheet at higher levels, these levels are preferred because the electrostatic properties of the sheet are typically reduced, thus reducing the overall cleaning performance of the sheet.
[0043]
Mineral oil alone can also be utilized as an additive to the cleaning sheet of the present invention. However, when only mineral oil is used, it is necessary to use a relatively low additional level to minimize the residue remaining on the surface wiped with the cleaning sheet and leave a visually acceptable surface for the consumer. Must. Additives consisting essentially of mineral oil typically comprise no more than about 4%, preferably no more than about 3%, more preferably no more than about 2%, and even more preferably no more than about 1% of the weight of the cleaning sheet. The level is applied to the cleaning sheet of the present invention.
[0044]
These low levels are particularly desirable when the additives are applied to at least one discrete continuous area of the sheet at an effective level and preferably in a substantially uniform manner. The preferred low level use of additives, especially to improve the adhesion of soil to the sheet, provides surprisingly good cleaning, dust control in the air, a favorable consumer impression, especially a tactile impression, and furthermore, a perfume, It may provide a means for incorporating and contacting pest control ingredients, antimicrobial agents such as fungicides, and a host of a number of other beneficial ingredients, especially those that are soluble or dispersible in the additive. These advantages are given by way of example only. Low levels of additives are particularly desirable if the additives can leave a visual residue on the treated surface. As a result, the level and type of additive selected will typically reduce the particulate pick-up and retention characteristics of the cleaning sheet while minimizing the amount of residue remaining on the surface wiped with the cleaning sheet. It is important to strengthen.
[0045]
The application means for these additives preferably applies at least a substantial amount of the additive at a point on the sheet that is "inside" the sheet structure. The amount of additive that comes into contact with the skin and / or surface to be treated and / or the package will otherwise cause damage or other substances that interfere with the function of the surface will only cause limited side effects It is a particular advantage of the three-dimensional structure and / or multiple basis weight that it produces no or no side effects. The presence of the additives inside the structure is very beneficial in that dirt adhering to the inside of the structure is not likely to be removed much by subsequent wiping operations.
[0046]
Preferably, the additives do not significantly reduce the electrostatic properties of the cleaning sheet. The cleaning sheet of the present invention preferably has an electrostatic property in order to promote the pick-up and holding of particulate matter, especially fine dust particulate matter.
The additive can be applied to the cleaning sheet of the present invention by various application methods. Such methods include manual rolling, mechanical rolling, slotting, ultrasonic spraying, pressurized spraying, pump spraying, dipping, and the like. A preferred method of applying the additive to the cleaning sheet is by ultrasonic spraying. The additives are preferably sprayed uniformly onto the cleaning sheet.
[0047]
Another preferred method of applying the additive to the cleaning sheet is by mechanical rolling. During the manufacturing process of the cleaning sheet, the sheet is fed through a set of rollers coated with the applied additives. The roller may be coated with the additive by rotating in a shallow bath or sump containing the additive. As the sheet is fed through the roller, the additives are transferred from the roller to the cleaning sheet. If the additive is a mixture of wax and mineral oil, especially where the ratio of wax to mineral oil is 1: 1, a shallow tank or sump containing the additive is preferably used to maintain the additive in a fluid state. Is heated to a temperature of about 32C to about 98C, preferably about 40C to about 65C. In such a situation, the rollers are preferably also heated to a temperature similar to that of the thermal additive in the fluid state. Typically, the temperature of the additive mix and the rollers is maintained at least about 5C to about 10C above the melting point of the additive mixture.
For small-scale production of the cleaning sheet of the present invention, the additive can also be applied to the cleaning sheet by manual rolling, which employs a hand-held roller and coats the roller with the additive. And rotating the roller over the entire surface of the cleaning sheet.
[0048]
III. Cleaning tools
In another embodiment, the present invention relates to a cleaning implement including the cleaning sheet described above. In one aspect, the cleaning implement comprises:
a. Handle, and
b. Detachable cleaning sheet containing an additive as described herein above
Is included.
As mentioned above, in this aspect of the invention, the cleaning sheet of the cleaning implement may have a continuous area surrounding individual areas that differ in terms of basis weight. Preferred is when the continuous area has a relatively higher basis weight than the individual areas. The sheet aspect of the device may also exhibit macroscopic three-dimensionality.
The tool of the present invention and a separate cleaning sheet of the present invention are compatible with all hard surface supports such as wood, vinyl, linoleum, wax-free floors, ceramic, Formica, porcelain and the like. Designed as
[0049]
The handle of the cleaning implement includes any extendable, durable material that can provide ergonomically practical cleaning. The length of the handle is dictated by the end use of the device.
The handle preferably includes at one end a support head to which the cleaning sheet can be releasably attached. To facilitate ease of use, the support head may be rotatably mounted on the handle using a known joining assembly. As long as the cleaning sheet remains applied during the cleaning process, any suitable means for attaching the cleaning sheet to the support head may be utilized. Examples of suitable fastening means include clamps, hooks and loops (eg, Velcro®), and the like. In a preferred embodiment, the support head may include means for gripping the sheet on its upper surface such that the sheet remains mechanically attached to the head during the harsh cleaning task. However, the gripping means easily releases the sheet for convenient removal and disposable.
The cleaning sheet useful for the cleaning tool of the present invention is as described above.
[0050]
IV. Usage and products
The present invention further encompasses a method of cleaning a surface using a cleaning sheet with or without the additives described herein. A method of cleaning a surface generally involves contacting a cleaning sheet as described herein with the surface. The surface is usually contacted by wiping the surface with a cleaning sheet (wiping). Wiping may be performed using an action of wiping the surface to be cleaned back and forth, or as described in It can be performed with an S-shaped pattern as shown in section B. The cleaning sheet may be applied using human hands (preferably for dust removal by hand) or using a handle such as the cleaning tools described herein (preferably floor cleaning or access). Difficult surfaces, such as for cleaning ceilings and walls, can be wiped. Such a method effectively removes dust / particulate matter from the surface.
[0051]
Large particulate matter, such as breadcrumbs, sand, pebbles, glass, etc., tends to be more difficult to pick up and remove from surfaces including floors such as vinyl, linoleum, hardwood, ceramics, and the like. The cleaning sheets herein are effective in removing large particulate matter from surfaces, but their effectiveness can be improved by using a "stamping" step in the cleaning method. Since the cleaning sheet is wiped with the surface to be cleaned, particulate matter not collected by the cleaning sheet can be deposited. The cleaning sheet is then lifted off the surface and pressed against the particulate matter deposit (ie, a "stamping" step). Pressure is applied to the cleaning sheet as it is pressed against the sediment to at least partially embed the particulate matter in the cleaning sheet. Preferably, the pressure applied to the cleaning sheet is due to: the weight of the cleaning sheet and / or the tool itself; the application of hand pressure to the cleaning sheet and / or the tool; Stepping down on the cleaning sheet and / or the tool by the user. The amount of pressure applied is preferably about 1.5 g / cm ² ~ 200g / cm ² , More preferably about 5 g / cm ² ~ About 170g / cm ² , More preferably about 7 g / cm ² ~ About 75g / cm ² , More preferably about 10 g / cm ² ~ 20g / cm ² Range. After the "stamping" step, the cleaning sheet is then lifted from the particulate matter deposit. This "stamping" step improves the effective removal of large particulate matter from surfaces using the methods described herein. The "stamping" step can be more effective when the cleaning sheet includes additives as described herein.
[0052]
It is important to teach the cleaning sheet consumer to utilize a "stamping" step in such a cleaning method in order for the consumer to experience improved cleaning performance of the cleaning sheet. As such, the present invention further includes a cleaning sheet packaged in a container and an informational indicator associated with the container and / or cleaning sheet to convey the benefits and methods of use to the consumer. About the product. As used herein, the phrase "related" means that the instructions for use are printed directly on the container itself, or in a brochure, printed advertisement, to communicate the instructions to the consumer of the product. It is meant to be presented in different ways, including but not limited to electronic advertising and / or spoken communication.
[0053]
Suitable containers for the products of the present invention include plastic flow wrap pouches, non-resealable flexible pouches with slit-like openings, paperboard cartons, cardboard cartons, and the like. Preferably, the container is made of co-pending US patent application Ser. No. 09 / 374,715 (Hardy, filed August 13, 1999 (P & G case number 7717)), the disclosure of which is incorporated herein by reference. Paperboard or cardboard carton as described in U.S. Pat.
[0054]
The informational label associated with the container and / or cleaning sheet may include a set of verbal instructions that convey the benefits of the methods herein and steps for performing the methods herein. (Eg, an icon or a logo). Preferably, the information labeling comprises contacting the surface containing the particulate material with a cleaning sheet, with or without additives as described herein; wiping the surface with the cleaning sheet. Instructions for pressing (or "stamping") the cleaning sheet against the sediment of the particulate material; and lifting the cleaning sheet from the sediment of the particulate material. Is a set of instructions for use. A preferred set of instructions further includes instructions for disposing of the cleaning sheet after lifting the cleaning sheet from the deposit of particulate matter. By directing the consumer to perform a "stamping" step, the consumer may achieve an improvement in cleaning performance that he or she would otherwise not be able to achieve. The cleaning performance improvement typically achieved by utilizing the "stamping" step is at least twice the performance of the cleaning sheet without the "stamping" step in terms of the percentage of granulated material pickup. The cleaning performance improvement can be as high as four or six times the performance achieved without the "stamping" step in terms of the percentage of granulated material pickup.
[0055]
V. Test method
A. Residue testing for film and streak formation
The extent of residue remaining on the surface to be wiped with the cleaning sheet is measured for film formation and / or streak formation by the following test method. This test method is performed by performing the following steps:
1. Pre-clean both sides of the clear glass surface with a commercially available glass cleaner, such as Cinch®, followed by isopropanol until there is no visible stain or streaks. Divide the glass surface into four to make four equal test areas approximately 28 cm wide by 18 cm long.
2. Fold the first cleaning sheet to be tested into eight. Using consistent pressure and speed, wipe the test area with the folded sheet four times horizontally and seven times vertically. The folded sheet is turned over and the unused section of the sheet is placed on the glass and repeated four times horizontally and seven times vertically on the same test surface area, consistent with wiping speed and pressure.
3. Turn the glass surface upside down. Unfold the sheet once (leaving it folded in half) and refold it to reveal the two unused quarters of the sheet. Step 2 is repeated on the back surface of the same test area.
4. Steps 2 and 3 are repeated for up to three more sheets on the other glass test area.
5. Each test area is visually graded on a 0-4 scale using 0.125 increments by scanning the glass surface with a single blue light in the dark. The amount of film formation and / or streak formation on the glass surface is visually graded according to the following scale:
0 = No film / streak
1 = Mild film / streak
2 = Medium film / streak
3 = Severe film / streak
4 = Extremely heavy film / streak
The result is an average of three times of the test and is shown in the column of "Residue Grade" in Table 1 below.
[0056]
B. Granular pickup performance test
The following test method measures the ability of the cleaning sheet to pick up particulate matter from the surface. This test method is performed by performing the following steps:
1. Soil is prepared to mimic the particulate material typically found on furniture surfaces. The soil used in this test consisted of the following: 0.50 g of vacuum cleaner soil (ie dust collected from the vacuum cleaner bag) 0.50 g of cotton dust (microshred cellulose and vacuum cleaner) Consisting of a 50/50 mix of dust), and 0.02 g of pet hair.
2. Next, a vinyl floor test surface area of about 1.5 mx 21 m is prepared for testing by pre-cleaning the vinyl floor with a 20% isopropanol solution and polishing and drying the vinyl floor surface. After drying the surface, the surface is cleaned with a commercial Swifer ™ tool and a clean Swifer ™ sheet to normalize the surface electrostatic charge.
3. The soil (described above) is weighed and then evenly distributed on the surface of the pre-cleaned vinyl floor in a test surface area of about 1.5mx21m.
4. The cleaning sheet to be tested is weighed and then attached to a tool, such as a Swifer ™ tool, using the handle and pad of the mop. The surface of the vinyl floor is then cleaned with the following pattern: The floor is wiped using an upper and lower S-shaped pattern. Clean the first two thirds of the floor width starting at the left front and ending at the right two third sides. Rotate the mop head in half the cycle to change the leading edge from front to back. After switching between the leading and trailing edges, the dirt falls off the sheet. When the mop is applied to the fallen dirt, the upper and lower S-shaped pattern is continued. When the edge of the surface is reached, push the mop straight forward until it reaches the right rear corner of the test surface. Rotate the mop head to the left and keep pushing the entire back of the baseboard to clean the back third. When you reach the corner, turn the mop head to the left and push it over the length of the floor. When the edge of the surface is reached, turn the mop head to the right to carry the dirt deposits to the center of the floor. This cleaning pattern is illustrated as follows:
[0057]
[Table 1]

[0058]
6. After completing steps 1 and 2, release the mop head from the floor and carefully place it directly on the soil deposit. Press and lift on soil deposits at moderate pressure.
7. Re-weigh the cleaning sheet with an analytical balance and record the sheet weight.
8. Calculate and report data using the following formula:
Sheet pickup% = (final sheet weight−initial sheet weight) /1.05 g × 100
The results of this test method (average of three repetitions) are shown in the column of "Particle Pickup" in Table 1 below.
The following are examples of the cleaning sheet of the present invention, but are not limited thereto.
[0059]
[Example]
Hereinafter, the cleaning sheet of the present invention will be exemplified. Table 1 presents the results of the "residue test for film formation and streaking", and the "particulate pick-up performance test" for an exemplary cleaning sheet.
[0060]
Example sheet A
Example 2 This example describes a method of manufacturing a cleaning sheet as shown in the schematic diagram of FIG. During this process, width 210 mm and basis weight 30 g / m ² The continuous primary web 310 made of polypropylene is continuously supplied from left to right as shown in the schematic diagram. At the same time, tow 312, consisting of a bundle of 2,000-100,000 polyester continuous filaments 315, each of 2-30 denier, is fed continuously from left to right as shown. The tow 312 is opened or fiberized by a set of extension rolls 311 to form a continuous secondary web having a desired width and then laid on the primary web 310. The primary web 310 and the secondary web 312 are sent to a heated embosser 320, where they are compressed together under heat and heat sealed together, thereby forming a heat seal line 316 extending across. Forming to form a continuous composite tertiary web 321. Heat seal lines 316 are provided so that one is spaced from the other by a distance d measured in the longitudinal direction of the tertiary web, ie, intermittently aligned in the longitudinal direction of the tertiary web 321. The secondary web 312 is then cut in two by a first cutter 325 along a midline extending between and parallel to each pair of adjacent heat seal lines 316. Next, the primary web 310 is cut to a desired length by the second cutting machine 326. In this way, individual cleaning sheets 1 are obtained from the tertiary web 321. In this process, the individual base sheets 10 are obtained from the primary web 310, the brush-like filaments 11 are obtained from the secondary web 312, the individual filaments 15 of the brush-like filaments 11 are obtained from the continuous filaments 315, and are fixed. Portion 16 is provided by heat seal wire 316. Preferably, each of the heat seal lines 316 has a width of 2-10 mm and is separated from adjacent heat seals by a distance of 20-200 mm. Prior to formation of these brush-like filaments 11, the brush-like filaments 11 or secondary webs or tows 312 are coated with additives as described in Table 1 at the appropriate stage of the process. In the section of the primary web 310 cut by the second cutting machine 326, the distance D between each pair of adjacent heat seal lines 316 is dimensioned to be greater than the distance d to obtain a relatively large marginal area 7. This makes it easier to place the cleaning sheet 1 on the holder 2. In this case, the section defined between two adjacent heat seal lines spaced apart from each other by a distance D necessarily provides a relatively long brush-like filament 11, which brush-like filament 11 remains. It must be cut to a length corresponding to the brush-like filament 11. According to the method shown, the length of each filament 15 depending from the anchoring portion 16 corresponds to about 1/2 of the distance d. If desired, the length of the secondary web 312 supplied to the section of the primary web 310 defined between each pair of adjacent heat seal lines 316 may be increased by a distance of It can be dimensioned longer than d.
FIG. 5 shows a cleaning sheet obtained by this method.
[0061]
Example sheet B
This example illustrates the combination of a carded web and a scrim (ie, a network of polypropylene filaments) to produce the hydroentangled cleaning sheet of the present invention. Prepare two carded polyester fiber webs with a scrim in between. The combination of the two carded webs and scrim is then placed on top of an aperture forming belt (23C square wave; available from Albany International, Engineered Fabrics Division, Appleton, WI), hydroentangled and dried. The entanglement method entangles the fibers and entangles them with the scrim while moving the fibers apart, providing two distinct basis weight regions. During the drying stage, the hydroentangled sheet becomes “quilted” (ie, greater three-dimensionality is achieved) as a result of the shrinking of the polypropylene scrim relative to the polyester nonwoven. Next, the nonwoven fabric cleaning sheet is coated with the additives described in Table 1.
[0062]
As a preferred optional step, the entangled nonwoven sheet may be further heated, for example, at 180 ° C. for 10 seconds on a molding machine (this heating may be performed before or after the surface treatment, but is preferably performed before application of the additives. Is done). This provides even further enhancement of three-dimensionality.
The cleaning sheet obtained from this method is illustrated in FIGS.
[0063]
[Table 2]

¹ The total weight of the cleaning sheet aggregate.
[0064]
The above results show that the selection of the type and level of additive applied to the cleaning sheet minimizes the amount of visual residue remaining on the surface wiped by the cleaning sheet while the particulate pick-up of the cleaning sheet. It is important to improve.
[Brief description of the drawings]
FIG. 1 is a perspective view showing a first embodiment of a thermal adhesive cleaning sheet of the present invention.
FIG. 2 is a sectional view taken along the line III-III in FIG. 1;
FIG. 3 is a perspective view showing a second embodiment of a cleaning sheet different from the embodiment shown in FIG. 1;
FIG. 4 is a perspective view showing a third embodiment of a cleaning sheet different from the embodiment shown in FIG. 1;
FIG. 5 is a digital photograph of a perspective view showing a fourth embodiment of a cleaning sheet including brush-like filaments.
FIG. 6 is a schematic diagram illustrating a method for manufacturing a cleaning sheet as shown in FIG.
FIG. 7 is a photograph (12 × magnification) of the hydroentanglement cleaning sheet of the present invention, showing a high basis weight continuous area and a plurality of low basis weight individual areas.
FIG. 8 is a plan view of the hydroentangled cleaning sheet shown in FIG. 7 to facilitate consideration of the difference in basis weight of the sheet.

Claims (20)

A cleaning sheet comprising an additive containing a wax, preferably a wax selected from the group consisting of paraffin wax, microcrystalline wax, petrolatum and mixtures thereof, and an oil, preferably a mineral oil. And a cleaning sheet having a total aggregate basis weight of at least 120 g / m ² . The cleaning sheet according to claim 1, wherein the additive is applied to the cleaning sheet at a level of 0.01% to 25% of the weight of the cleaning sheet. 3. The cleaning sheet according to claim 2, wherein said additive contains said oil to said wax ratio of 1:99 to 7: 3. A cleaning sheet containing an oil-containing additive in an amount of 4% or less, preferably 3% or less of the weight of the cleaning sheet, wherein the cleaning sheet has an amount of 20 g / m ^{2 to} 275 g / m ² , preferably cleaning sheet having a total aggregate basis weight of ^{30g / m 2 ~150g / m 2} . It includes at least two separate regions of different basis weights, the first basis weight region has a basis weight of ^{80 g} / m 2 to 300 g / ^{m 2,} a second basis weight regions 30g / m~130g / m The cleaning sheet according to claim 4, having a basis weight of ² . The cleaning sheet according to claim 5, wherein the first basis weight area includes a plurality of brush-like filaments attached to at least one side of the cleaning sheet. It includes a plurality of discrete low basis weight discrete regions surrounded high basis weight continuous region having a basis weight of ^{30g / m 2 ~120g / m 2} , and the high basis weight continuous region of the low basis weight The cleaning sheet according to claim 4, wherein the discontinuous areas are arranged in a non-random repeating pattern, and have a basis weight of 80% or less of the basis weight of the high basis weight continuous area. below:
(A) at least two separate regions of different basis weights, the first basis weight region has a basis weight of ^{80 g} / m 2 to 300 g / ^{m 2,} a second basis weight regions 30 g / m to An area having a basis weight of 130 g / m ² ;
(B) selected from the group consisting of waxes, preferably paraffin waxes, microcrystalline waxes, petrolatum, and mixtures thereof, at a level of 0.01% to 25%, preferably 5% or less, by weight of the cleaning sheet. Wax, and additives containing oils, preferably mineral oils;
A said cleaning sheet comprising ^a cleaning sheet having a total aggregate basis weight of ^{60g / m 2 ~275g / m 2} . 9. The cleaning sheet according to claim 8, further comprising a plurality of brush-like filaments attached to at least one side of the cleaning sheet. The cleaning sheet according to claim 9, wherein the additive comprises the oil to the wax ratio of 1:99 to 7: 3, preferably 1: 1. Cleaning agent characterized by comprising an additive containing up to 15% by weight of the cleaning sheet of a wax, preferably a wax selected from the group consisting of paraffin wax, microcrystalline wax, petrolatum and mixtures thereof. a ^sheet, a cleaning sheet having a total aggregate basis weight of ^{20g / m 2 ~275g / m 2} . The cleaning sheet according to claim 11, comprising a synthetic fiber. below:
(A) a base sheet;
(B) a plurality of brush-like filaments attached to the base sheet;
(C) an additive comprising a wax, preferably a paraffin wax, and an oil, preferably a mineral oil, wherein the additive is applied to the cleaning sheet at a level of 15% or less by weight of the cleaning sheet;
A cleaning sheet characterized in that it comprises ^a cleaning sheet having a total aggregate basis weight of ^{60g / m 2 ~275g / m 2} . 14. The cleaning sheet according to claim 13, wherein the additive contains the oil to the wax ratio of 1:99 to 7: 3, preferably 1: 1. A method for producing a cleaning sheet comprising a base sheet, a plurality of brush-like filaments attached to at least one side of the base sheet and an additive, comprising:
(A) continuously supplying the base sheet primary web containing a heat-sealable substance;
(B) providing a secondary web comprising heat-sealable continuous filaments on the primary web continuously in the machine direction;
(C) extending the primary and secondary webs laterally to obtain a continuous composite tertiary web that integrally includes the primary and secondary webs, and intermittently in the longitudinal direction of the primary and secondary webs. Providing an aligned heat seal line to the primary and secondary webs;
(D) parallel to and between each pair of adjacent heat seal lines such that the length of the secondary web corresponding to half the length between each pair of adjacent cut lines defines the brush-like filaments; Cutting the secondary web transversely along an extending midline;
(E) spraying or rolling an additive, preferably containing wax and oil, onto said primary and / or secondary web, preferably at a level of not more than 15% by weight of said primary and secondary web; ,
(F) cutting the primary web to a desired length to obtain the cleaning sheet;
A method comprising: 16. The method of claim 15, wherein said additive is sprayed onto said primary and secondary webs by sonic spraying. A cleaning sheet manufactured by the method according to claim 15. A method for producing a cleaning sheet comprising a base sheet, a plurality of brush-like filaments attached to at least one side of the base sheet and an additive, comprising:
(A) continuously supplying the base sheet primary web containing a heat-sealable substance;
(B) providing a secondary web comprising heat-sealable continuous filaments on the primary web continuously in its longitudinal direction;
(C) extending the primary and secondary webs laterally to obtain a continuous composite tertiary web that integrally includes the primary and secondary webs, and intermittently in the longitudinal direction of the primary and secondary webs. Providing an aligned heat seal line to the primary and secondary webs;
(D) parallel to and between each pair of adjacent heat seal lines such that the length of the secondary web corresponding to half the length between each pair of adjacent cut lines defines the brush-like filaments; Cutting the secondary web transversely along an extending midline;
(E) dipping the primary and secondary webs in a solution or dispersion of an additive, and then drying;
(F) cutting the primary web to a desired length to obtain the cleaning sheet;
A method that includes: In products for cleaning a surface containing particulate matter, the cleaning sheet preferably has a collection basis weight of about 20 g / m 2 ^~ about 275 g / m ^2, optionally packaged additive into the vessel A cleaning sheet, preferably including a wax and oil additive, and an informational indicator associated with the container, wherein the informational indicator is on the cleaning sheet across the surface. The article of manufacture comprising instructions for forming the particulate matter deposit by wiping and cleaning the surface by pressing the cleaning sheet onto the particulate matter deposit. 20. The product of claim 19, wherein the information display is selected from the group consisting of a set of instructions, a series of pictograms, and combinations thereof.