FR2680963A1 - DUST AND WIPING CLOTH, BASED ON POLYOLEFINS. - Google Patents

Abstract

The invention relates to a dusting and wiping cloth for household and industrial use made from a nonwoven sheet made from thermoplastic microfibers, optionally containing surfactants, which is packed in patterns into partial surfaces. , the non-woven sheet containing fibers made of an LDPE.

Description

1 - Dust and wiping cloth, based on polyolefins

  The invention relates to a dust and wiping cloth, for household and industrial use, for collecting

  solid particles and / or liquids of any type,

  qué from a sheet of nonwoven containing micro-

  fibers produced by melt blowing materials

  thermoplastics, in particular polyolefins, and even

  of surfactants, the nonwoven sheet

  being packed into patterns in partial surfaces.

  Non-woven cloths for wiping are particularly known, for example from DE-C-28 45 551 or

  DE-U-76 08 660, EP-A-O 259 692 or DE-A-34 11 515 The quali-

  essential production of nonwovens based on thermo fibers

  plastics which are packed into patterns by hot stamping

  in partial surfaces, for example by means of

  The grainers, for use as wiping cloths with or without impregnation product, is already described in general form in US-A-3,849,241 or US-A-3,978,185 or US-A-3,811 957 According to these documents,

  also knows how to make thermo fibers wettable

  hydrophobic plastics in nature, by addition of agents

  wetting processes for making sheets of non-wetting

  woven fabrics are also described for example in

US-A-3,795,571 and US-A-3,704,198.

  A large number of known wiping cloths are designed for selected applications for the collection of t 2 - selected soiling, for example in the form of dust cloths, washing cloth, oil cloth or

  cloth for dusting steel or the like Cepen-

  However, soiling usually does not only appear in one form but as a mixture of several variants, namely in the form of a mixture of dust, fat, water, leftover meals, liquids of all types, etc. The object of the invention was to produce a dust and wiping cloth based on polyolefins, for domestic and industrial use, for collecting the most diverse types of dirt, which collects the dirt with the least

  grease possible, has an antistatic and disinfecting effect

  as long and can be produced economically.

  Unexpectedly, it has been discovered that this object is achieved with a dust cloth and for wiping, with

  domestic and industrial use, for the collection of parti-

  solid and / or liquid cules of all types, made from a non-woven sheet containing microfibers

  produced by melt blowing of thermo-materials

  plastics, especially polyolefins, and possibly-

  a surfactant, the nonwoven sheet being compacted into patterns in partial surfaces, which is characterized in that the nonwoven sheet contains more

  50% by weight of fibers made up of P Ebdl (poly-

  linear low density ethylene).

  The preferred polyolefin according to the invention is P Ebdl, which has good mechanical strength and good toughness, so that wiping cloths

  made from it have good resistance

  abrasion resistance, have at the same time a "good hand" and a good softness, and are still sufficiently resistant to linting. To increase the wettability, surfactants are preferably added, the surfactants acting as antistatic agents or of disinfectants being preferred The proportion of surfactants added depends on the 3 - surfactant chosen and the desired effect The amount of surfactants can be chosen between 0.3 and 5% by weight Thanks to the use of a mixture of fibers consisting of most of P Ebdl fibers and up to about 45% by weight of fibers made of a propylene homopolymer, a wiping cloth having a good hand and a high resistance to use is produced. abrasion and tear resistance are sufficiently achieved by the fact that P Ebdl having a melt flow index (IFF) (190 / 2.16) is used in the range from '' envi 5 to 100 g / 10 min, preferably 10 to g / 10 min, and a density of 0.95 g / cm 3 and a polypropylene having a melt flow index (IFF) (230 / 2.16) of at least 100 g / 10 min In particular, thanks to the P Ebdl used, the dust and wiping cloth according to the invention, with weights per unit area of more than 100 to 200 g / m 2, is not as stiff as wiping cloths made from a nonwoven fabric

  only polypropylene fibers.

  The use of surfactants can improve the wettability, disinfectant and antistatic properties of the dust cloth and for

  wiping down "Surfactants" means surfactant compounds

  amphiphilic active ingredients with low to medium molecular weights,

  which contain, as a hydro-

  phobe, at least one hydrocarbon radical having 8 carbon atoms and, as a molecular fragment

  hydrophilic, charged or uncharged polar groups.

  According to the invention, anionic, nonionic or amphoteric surfactants are preferred. It is however also possible to add to wiping cloths, at

  base of P Ebdl, cationic surfactants, individual-

  ment or mixed with other surfactants.

  In this case, the surfactants are preferably applied

  on the surface of the fibers or the sheet of non

  woven, for example during the manufacturing process of the 4 - nonwoven sheet, either directly by spraying on

  the fibers, either by impregnating the sheet of non

woven.

  The anionic surfactants which can be used for the invention

  There are negatively charged hydrophilic groups, such as carboxyl, sulfonate, sulfate, phosphonate and phosphate groups. Soaps,

  alkylbenzenesulfonates, alkyl ethersulfates, alkane-

  sulfonates and alkyl sulfates as well as lignin-

  sulfonates and petroleum sulfonates According to a preferred embodiment of the invention, a mixture is used

  anionic surfactants based on polyesters

  glycol and fatty acids and phosphates of fatty alcohols This not only achieves improved wettability of the dust cloth and for wiping, but at the same time prevents electrostatic charging of the dust cloth

and for wiping.

  The nonionic surfactants used according to the invention comprise, as hydrophilic molecular fragment, ether groups, in particular oxyethylene groups, N-oxide functions of amine or sulfoxide On

  can thus use alkyl oxyethylation products

  phenols, oxyethylation products of fatty alcohols and alkanolamides of fatty acids, as well as ethylene oxide / propylene oxide co-oligomers and

  Long chain amine N-oxides According to one embodiment

  Preferred tion is used, as a nonionic surfactant, a surfactant based on oxyethylation products

fatty alcohols.

  According to the invention, tensio-

  amphoteric active ingredients These contain in a molecule

  minus one ampholyte group, the carbo and sulfobetaines

  each carrying an ammonium group and a carboxyl or sulfo group, as well as at least one hydrophobic molecular fragment, being particularly important. The surfactants -

  of this type are to a large extent biodegradable

devils.

  Since the polyolefin fibers are

  tially lipophilic, depending on the desired degree of wettability by water and antistatic power, it is necessary to provide a corresponding amount of surfactants, that is to say wetting agents In this case, it is also possible to provide the cloth dust and wiping agent

  additional surfactant, incorporating the surfactant

  active with the thermoplastic material, in particular with P Ebdl, from which the fibers are produced, surfactant which becomes active, in the subsequent use of the nonwoven sheet, by migration to the surface of the fibers. relates to these wetting agents which become effective as internal surfactants, in particular

  more anionic, nonionic and / or ampho- surfactants

  it is also possible to provide catalytic surfactants.

  A preferred embodiment provides for this purpose surfactants based on oxyethylation products of fatty alcohols, in particular those with additional antistatic effect Polyolefins with incorporated surfactants

  are described for example in US-A-4,578,414.

  We get a dust cloth and for wiping,

  having a good cleaning effect and good disinfecting power

  while using a sheet of nonwoven having in

  most of the fibers made up of a P Ebdl (poly-

  linear low density ethylene) and up to about 45% by weight of fibers made of a propylene homopolymer,

  and a cationic surfactant, playing the role of disinfectant

  fectant, in an amount of at least 1.0% by weight, relative to the nonwoven sheet Thanks to the use of a mixture of fibers based on polyethylene and based on polypropylene, with a major part of polyethylene, a soft wiping cloth with a very good hand is produced, which not only collects well on 6 - flat surfaces, but can also be easily inserted in corners and in holes Abrasion resistance and

  tear strength are reached to a sufficient degree

  health through the use of a P Ebdl having a melt flow index (IFF) (19012.16) in the range from about 5 to 100 g / 10 min, preferably from 10 to g / 10 min, and a density of 0, 95 g / cm 3, as well as a polypropylene having a melt index in the state

  melted (IFF) (230 / 2.16) of at least 100 g / 10 min In particular

  in a configuration with relatively high weight per unit area, of more than 100 to 200 g / m 2, the dust and wiping cloth according to the invention proves to be less rigid than known cleaning cloths which are not

  made up only of polypropylene fibers.

  Unexpectedly, it has been discovered that by the use of cationic surfactants, it is possible not only to improve the wettability of the dust cloth and for wiping, but at the same time to a disinfecting effect which remains clean for a long time. dust and for wiping The cationic surfactant is in this case preferably applied to the surface of the fibers or of the nonwoven sheet, for example during the process of manufacturing the nonwoven sheet, either directly by spraying onto the fibers , either by impregnating the

  nonwoven sheet Cationic surfactants used

  sands for the invention contain positively charged hydrophilic groups, in particular ammonium groups, but cationic surfactants can also be used

  with protonated phosphonium or amine N-oxide groups

  placed quaternary ammonium having a long chain alkyl radical, which at the same time manifest a disinfecting effect,

  have proven to be particularly advantageous It is all-

  times also possible to use ammonium salts qua-

  ternary comprising two long-chain alkyl radicals, which exhibit higher wetting power As 7 - cationic surfactants, quaternary ammonium salts are preferably used, which have properties

  surfactants Compounds of this type are also known as

  My "reverse soaps" In these compounds, as a rule three methyl groups or two methyl groups and a benzyl radical as well as a long chain aliphatic radical are linked to the N atom The N atom positively charged with the radicals methyl constitutes the hydrophilic part of the molecule, the long-chain alkyl radical constitutes the

  hydrophobic part of the molecule The atom of N can also

  be a component of a ring or be replaced by a positively charged phosphorus atom Mixtures with various lengths of alkyl chain can also be provided In the hydrophobic radical, can also be

  incorporated other structural elements, such as groups

  esters of carboxylic acid In addition to surface-active properties, inverted soaps of this type have a wide spectrum of antibacterial activity, which is particularly advantageous in dust rags and for wiping because, precisely in the house, they are used successively in the most diverse places and therefore with the dust cloth and for wiping according to the invention, it is at least partly possible to

  oppose the transfer of bacteria.

  For many purposes of using dust cloths and for wiping, it is desirable that these

  have a particularly velvety and voluminous shape

  As a result of the manufacturing process of the nonwoven sheet, in which the fibers are packed into partial surfaces by plasticization and compression, and in this way the nonwoven acquires its compact and wear-resistant structure. the velvety nature of the nonwoven is

  however at the same time reduced by calendering and

  page In order to achieve a straightening of the thermo- fibers

  plastics after hot stamping and compaction of the 8 - nonwoven sheet, and in order to obtain a wiping cloth which is bulky while having sufficient mechanical strength, we add to the nonwoven sheet

  maximum 5% i by weight, based on the sheet of non

  woven, sodium carboxymethylcellulose The nonwoven sheets, and therefore the wiping cloths, are preferably colored, and for this purpose they can be not only printed but also have a solid color, for example being able to be dyed by adding suitable dyes, in usual quantity, to the materials

  thermoplastics used for the manufacture of fibers.

  For purposes of use under relatively high thermal stress, for example the wiping of hot objects, it may be advantageous to partially provide the sheet with

  non-woven for dust cloths and for wiping

  ge, of relatively high strength thermoplastic fibers

  thermal resistance, for example based on thermoplastic polyester-

  corresponding tick or of polyaryl-oxides, -sulphides,-linear sulfones, in particular fibers of thermoplastic polyester, polyamides, poly (phenylene sulfide), these fibers with relatively high thermal resistance being able to partially replace both polypropylene fibers and fibers of P Ebdl, that is to say up to 301% by weight, relative to the total amount of fibers of the nonwoven sheet. This increases the wiping resistance and the tear resistance

wiping cloth.

  Low-cost dust and wiping cloths

  teux and can be manufactured economically, having sufficient wiping and dusting properties for various types of soiling, are characterized in that the nonwoven sheet comprises 55 to 65% by weight of fibers consisting of a P Ebdl having an IFF (190 / 2.16)

  from 10 to 30 g / 10 min and from 45 to 35 'O by weight of polypro-

  pylene having an IFF (230 / 2.7) of 200 to 1,000 g / 10 min and surfactants in an amount of 0.3 to 4% by weight,

  compared to the nonwoven sheet, the non-woven sheet

woven 9 -

  having a weight per unit area in the range of

about 50 to 200 g / m 2.

  Dust and wiping cloth according to the instructions

  vention which is particularly advantageous is characterized in that the nonwoven sheet comprises from 55 to 65% by weight of fibers consisting of a P Ebdl having an IFF (190 / 2.16) of 10 to 30 g / 10 min and from 45 to 35% by weight of prolypropylene having an IFF (230 / 2.16) of 200 to 1000 g / 10 min and a cationic surfactant based on quaternary ammonium salts in an amount of 1.5 to 4 % by weight, relative to the nonwoven sheet, the nonwoven sheet having a weight per unit area in the

range of about 50 to 200 g / m 2.

  The compaction in patterns of the nonwoven sheet, made from microfibers, is carried out as described in the US patents cited at the start, for example US-A-3,704,198 In this case, from approximately 10 to 30 % of the surface of the nonwoven is preferably bonded by heat-bonding, these surfaces bonded to numerous small individual surfaces of different sizes being arranged approximately uniformly on the surface of the nonwoven. An example of bonding can be seen. patterns of this type in FIG. 1, representing a dust cloth and for wiping 1, the bonded surfaces being designated by 2

  (1: 1 scale representation).

  The present invention is illustrated in more detail at

  using the descriptive and nonlimiting examples below.

  Wiping cloths were made from a sheet of nonwoven based on meltblown microfibers, having an average diameter of up to about 12 mm, produced by meltblown, for example according to the process described in US Pat. No. 3,978,185, containing 60% by weight of fibers consisting of P Ebdl and 40% by weight of fibers consisting of a polypropylene homopolymer Les

  thermoplastic polymers are in this case extruded into fila-

-

  uents in air currents, in separate extruders

  then the filaments are drawn into fine fibers and

  fragmented by blowing, the fibers made of poly-

  propylene being added to the air streams of P Ebdl fibers, and during the meeting under the effect of turbulence

  caused by drafts, there is a melanin

  uniform geage of the fibers of P Ebdl and polypropylene, and this mixture is deposited on a support, in a loose nonwoven with tangled fibers, and is then glued in patterns and stamped by crossing calendering rollers with application of heat and pressure For polyethylene fibers, a P Ebdl having a density of 0.945 g / cm 3 and an IFF (190 / 2.16) of 25 g / 10 min, which can be obtained for example as a product, is used. dow chemical trade

  Company As the polypropylene resin, a homo-

  polypropylene polymer with ultra-high melt index, having a melt index, measured according to the ASTM D 1238 condition L method, of 400 dg / min, which corresponds to an IFF (230 / 2, 16) of 400 g / 10 min, and a density of 0.9 g / cm From the thermoplastic fibers, a nonwoven is prepared having

  a weight per unit area of 75 g / m 2.

Example 1

  On the nonwoven with tangled fibers, based on loosely joined thermoplastic fibers, a solution containing anionic surfactants with antistatic effect, suitable for sizing staple fibers, was sprayed before hot stamping. such as for example the product available under the trade name "BK 21050 Il from the firm Henkel After evaporation of the solvent

  and water, the nonwoven sheet is loaded superfi-

  cially with about 2% by weight of surfactant,

  relative to the weight of the nonwoven sheet.

  active ingredients are applied in this case from a 2% aqueous solution. After this, hot stamping ll - of the nonwoven sheet is carried out.

  spray a surfactant sheet with surfactant

  embossed woven or to apply the surfactant from aqueous solutions, for example by immersion in a bath or by means of applicator rollers The solvent is then removed by evaporation With regard to the agent

  surfactant "BK 2105", it is a mixture based on es

  ters of polyglycols and fatty acids and aluminum phosphates

  fatty cools, which also play the role of anti

  static Dust and wiping cloths manufactured

  than usual sizes from the sheet of non

  woven wipe clean, according to the purpose of use, in domestic use, tables, floors, soiled surfaces and which also contain grease, and are also well wettable in contact with water and retain liquids.

Example 2

  On the nonwoven with tangled fibers, manufactured for example 1, having a weight per unit area of 75 g / m 2, the cationic surfactant "Zephirol" from the firm is sprayed before hot stamping. Bayer AG, so that the nonwoven sheet receives approximately 2% by weight of surfactant relative to the weight of the nonwoven sheet. The surfactant is then applied from

  of a 2% aqueous solution After that, the

  hot stamping of the nonwoven sheet It is also possible to spray surfactant on a stamped nonwoven sheet, or to apply the surfactant, from aqueous solutions, for example in a soaking or by means of applicator rollers Le

  solvent is then removed by evaporation As regards

  identifies the cationic surfactant "Zephirol", it is a quaternary ammonium compound based on alkylbenzyldimethylammonium chloride. 12 -

Example 3

  As in Example 1, a nonwoven with tangled fibers is prepared, as indicated above, made up of 100% P Ebdl fibers. From the fibers of P Ebdl, a nonwoven having a weight per surface unit of 75 g / mr, spraying on the fiber fleece

  matted, made up of loose loose thermoplastic fibers

  nies, before hot stamping, the nonionic surfactant and free of APEO "Diadavin NSE O" from the firm Bayer AG, so that the nonwoven sheet contains

  approximately 2.2% by weight of surfactant

  active, relative to the weight of the nonwoven sheet In this case, the surfactant is applied from a 2% aqueous solution Then the hot stamping of the nonwoven sheet is carried out As in the first example, it is also possible in this case to subsequently spray the surfactant onto a stamped nonwoven sheet, or to apply the surfactant from aqueous solutions, for example by immersion in a soaking bath or by means of applicator rollers The solvent is then

eliminated by evaporation.

  Dust and wiping cloths, made in the usual sizes from the non-woven sheet,

  suitable for both household and commercial use

  industrial and craft station for tools and many applications, such as in workshops

auto repair.

13 -

Claims (12)

  1 Dust and wiping cloth, for domestic and industrial use, for the collection of solid particles and / or liquids of all types, made from a non-woven sheet containing microfibers   melt-blown picks of thermally   plastics, in particular polyolefins, and optionally a surfactant, the nonwoven sheet being packed in patterns in partial surfaces, characterized in that the nonwoven sheet contains more than 50% by weight of fibers   consisting of a P Ebdl (linear low density polyethylene).   2 Dust and wiping cloth according to the   claim 1, characterized in that the sheet of non   woven contains anionic and / or nonionic and / or cationic surfactants playing the role of disinfectant and / or amphoteric surfactants.   3 Dust and wiping cloth according to claim 1 or 2, characterized in that the nonwoven sheet is provided with surfactants in an amount ranging at least 0.3 to 5% by weight.   4 Dust and wiping cloth according to one   any of claims 1 to 3, characterized in that the   nonwoven sheet mainly contains fibers consisting of P Ebdl and up to about 45% by weight of   fibers made of a propylene homopolymer.   Dust and wiping cloth according to one   any one of claims 1 to 4, characterized in that   P Ebdl having a melt flow index (IFF) (190 / 2.16) in the range of about 5 to 100 g / 10 min, preferably 10 to 40 g / is used 10 min, and one density of 0.95 g / ca ?.   6 Dust and wiping cloth according to claim 4, characterized in that the polypropylene has a melt flow index IFF (230 / 2.16) of at least 100 g / 10 min. 14 - 7 Dust and wiping cloth according to one   any one of claims 1 to 6, characterized in that   the surfactants are applied to the surface of the fibers or of the nonwoven sheet.   8 Dust and wiping cloth according to one   any one of claims 1 to 7, characterized in that   the fibers of P Ebdl and / or the other fibers of the nonwoven sheet contain another surfactant incorporated into the   plastic material used for the production of fibers.   9 Dust and wiping cloth according to claim 2, characterized in that one uses   surfactants acting as antistatic agents.   Dust and wiping cloth according to   claim 2, characterized in that, as a surfactant   anionic active ingredients, those based on poly- esters are used   glycol and / or fatty alcohol phosphates.   11 Dust and wiping cloth according to the   claim 2, characterized in that, as a surfactant   non-ionic active ingredients, we use those based on products oxyethylation of fatty alcohols.   12 Dust and wiping cloth according to the   claim 2, characterized in that, as a surfactant   cationic active ingredients, ammonium compounds quater-   nary. 13 Dust and wiping cloth according to   claim 12, characterized in that the surfactant catio-   nique is a quaternary ammonium salt having a radical long chain alkyl.   14 Dust and wiping cloth according to one   any one of claims 1 to 13, characterized in that   the nonwoven sheet contains a maximum of 5% by weight, with respect to the nonwoven sheet, of sodium carboxymethylcellulose. Dust and wiping cloth according to one   any of claims 1 to 4, characterized in that the -   nonwoven sheet contains P Eb fibers: dl and event-   polypropylene fibers as well as thermoplastic fibers with relatively high thermal resistance,   in particular thermoplastic polyester fibers, poly-   amides, poly (phenylene sulfide). 16 Dust and wiping cloth according to one   any one of claims 1 to 15, characterized in that   the nonwoven sheet comprises from 55 to 65% by weight of fibers consisting of a P Ebdl having an IFF (190 / 2.16) of 10 to 30 g / 10 min and from 45 to 35% by weight of polypropylene having   an IFF (230 / 2.16) of 200 to 1000 g / 10 min and tensio-   active in an amount of 0.3 to 4% by weight, based on the nonwoven sheet, the nonwoven sheet having a weight per unit area in the range of about 50 to 200 g / 2.   17 Dust and wiping cloth according to one   any one of claims 1 to 15, characterized in that   the nonwoven sheet comprises from 55 to 65% by weight of fibers consisting of a P Ebdl having an IF? (190 / 2.16) from 10 30 g / 10 min and from 45 to 35% by weight of polypropylene having an IF? (230 / 2.16) from 200 to 1000 g / 10 min and a surfactant   cationic based on Quaternary ammonium salts in a quan-   1.5 to 4% by weight, based on the sheet of non   woven, the nonwoven sheet having a weight per unit   surface area in the range of about 50 to 200 g / r.