CN1192134C - Nonwoven fabrics for wiping applications - Google Patents

Nonwoven fabrics for wiping applications Download PDF

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Publication number
CN1192134C
CN1192134C CNB998148431A CN99814843A CN1192134C CN 1192134 C CN1192134 C CN 1192134C CN B998148431 A CNB998148431 A CN B998148431A CN 99814843 A CN99814843 A CN 99814843A CN 1192134 C CN1192134 C CN 1192134C
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China
Prior art keywords
cloth
wiping
rag
test
particle
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Expired - Fee Related
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CNB998148431A
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Chinese (zh)
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CN1331569A (en
Inventor
J·M·奥尔托特
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EIDP Inc
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EI Du Pont de Nemours and Co
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Classifications

    • D—TEXTILES; PAPER
    • D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
    • D04H—MAKING TEXTILE FABRICS, e.g. FROM FIBRES OR FILAMENTARY MATERIAL; FABRICS MADE BY SUCH PROCESSES OR APPARATUS, e.g. FELTS, NON-WOVEN FABRICS; COTTON-WOOL; WADDING ; NON-WOVEN FABRICS FROM STAPLE FIBRES, FILAMENTS OR YARNS, BONDED WITH AT LEAST ONE WEB-LIKE MATERIAL DURING THEIR CONSOLIDATION
    • D04H1/00—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres
    • D04H1/40—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties
    • D04H1/42—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties characterised by the use of certain kinds of fibres insofar as this use has no preponderant influence on the consolidation of the fleece
    • D04H1/425—Cellulose series
    • D04H1/4258—Regenerated cellulose series
    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47L—DOMESTIC WASHING OR CLEANING; SUCTION CLEANERS IN GENERAL
    • A47L13/00—Implements for cleaning floors, carpets, furniture, walls, or wall coverings
    • A47L13/10—Scrubbing; Scouring; Cleaning; Polishing
    • A47L13/16—Cloths; Pads; Sponges
    • D—TEXTILES; PAPER
    • D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
    • D04H—MAKING TEXTILE FABRICS, e.g. FROM FIBRES OR FILAMENTARY MATERIAL; FABRICS MADE BY SUCH PROCESSES OR APPARATUS, e.g. FELTS, NON-WOVEN FABRICS; COTTON-WOOL; WADDING ; NON-WOVEN FABRICS FROM STAPLE FIBRES, FILAMENTS OR YARNS, BONDED WITH AT LEAST ONE WEB-LIKE MATERIAL DURING THEIR CONSOLIDATION
    • D04H1/00—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres
    • D04H1/40—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties
    • D04H1/42—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties characterised by the use of certain kinds of fibres insofar as this use has no preponderant influence on the consolidation of the fleece
    • D04H1/4326—Condensation or reaction polymers
    • D04H1/435—Polyesters
    • D—TEXTILES; PAPER
    • D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
    • D04H—MAKING TEXTILE FABRICS, e.g. FROM FIBRES OR FILAMENTARY MATERIAL; FABRICS MADE BY SUCH PROCESSES OR APPARATUS, e.g. FELTS, NON-WOVEN FABRICS; COTTON-WOOL; WADDING ; NON-WOVEN FABRICS FROM STAPLE FIBRES, FILAMENTS OR YARNS, BONDED WITH AT LEAST ONE WEB-LIKE MATERIAL DURING THEIR CONSOLIDATION
    • D04H1/00—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres
    • D04H1/40—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties
    • D04H1/44—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties the fleeces or layers being consolidated by mechanical means, e.g. by rolling
    • D04H1/46—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties the fleeces or layers being consolidated by mechanical means, e.g. by rolling by needling or like operations to cause entanglement of fibres
    • D04H1/492—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties the fleeces or layers being consolidated by mechanical means, e.g. by rolling by needling or like operations to cause entanglement of fibres by fluid jet
    • D—TEXTILES; PAPER
    • D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
    • D04H—MAKING TEXTILE FABRICS, e.g. FROM FIBRES OR FILAMENTARY MATERIAL; FABRICS MADE BY SUCH PROCESSES OR APPARATUS, e.g. FELTS, NON-WOVEN FABRICS; COTTON-WOOL; WADDING ; NON-WOVEN FABRICS FROM STAPLE FIBRES, FILAMENTS OR YARNS, BONDED WITH AT LEAST ONE WEB-LIKE MATERIAL DURING THEIR CONSOLIDATION
    • D04H1/00—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres
    • D04H1/40—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties
    • D04H1/42—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties characterised by the use of certain kinds of fibres insofar as this use has no preponderant influence on the consolidation of the fleece
    • D04H1/4382—Stretched reticular film fibres; Composite fibres; Mixed fibres; Ultrafine fibres; Fibres for artificial leather
    • D04H1/43825—Composite fibres
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T442/00—Fabric [woven, knitted, or nonwoven textile or cloth, etc.]
    • Y10T442/60—Nonwoven fabric [i.e., nonwoven strand or fiber material]
    • Y10T442/69—Autogenously bonded nonwoven fabric
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T442/00—Fabric [woven, knitted, or nonwoven textile or cloth, etc.]
    • Y10T442/60—Nonwoven fabric [i.e., nonwoven strand or fiber material]
    • Y10T442/696—Including strand or fiber material which is stated to have specific attributes [e.g., heat or fire resistance, chemical or solvent resistance, high absorption for aqueous compositions, water solubility, heat shrinkability, etc.]
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T442/00—Fabric [woven, knitted, or nonwoven textile or cloth, etc.]
    • Y10T442/60—Nonwoven fabric [i.e., nonwoven strand or fiber material]
    • Y10T442/697—Containing at least two chemically different strand or fiber materials

Landscapes

  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Cleaning Implements For Floors, Carpets, Furniture, Walls, And The Like (AREA)
  • Nonwoven Fabrics (AREA)

Abstract

A method of using nonwoven fabrics is used for wiping in cleanroom applications wherein the fabrics were heretofore believed less than optimum for such applications and a nonwoven fabric is applicable for use in cleanroom applications.

Description

Nonwoven fabrics for wiping applications and application thereof
Background of invention
Invention field
The present invention relates to be used for erasing the cloth of liquid and/or particle from the surface.
Description of Related Art
The cloth of particular type is used for wipe surfaces.Its range of application is from only being the surface of liquid in the wiping dust free room of erasing on the household kitchen countertop, and latter's key is preferably not have particle or extremely micro-particle residue is only arranged on the surface of wiping.
One to thinking, the best cloth that clean room uses is a knitted fabric, the heat sealable or not heat seal in edge.The feature of this kind cloth is to have moderate absorbent properties, is considered to " totally ", that is, their releasable amounts of particles are very low.But the what is called release particles is meant original existence and the particle that discharges from cloth, and by to actual wiping cloth stress application and the new particle that produces.But thisly be considered to the excellent desired properties that cloth showed based on absorption test and release particles number.Although non-weaving cloth has been applied to some dust free room field, for example Sontara , a kind of registrar entitling of E.I.Du Pont Company, but think that they are not the good candidate materials, especially in the clean room field.This is because according to these static tests, judge the knitted fabric " dirty " of non-weaving cloth than washing, but the practical manifestation in wiping process is not investigated in this test.This kind non-weaving cloth has been applied to by Federal Specification 209E, and 1992-09-11 is decided to be in grade 100 or the higher dust free room, yet they are accepted as the clean room that is used to be decided to be grade 10 or lower (that is, cleaner) usually as yet fully.The maximum number of the given granularity floating particle of this canonical representation.For example, grade 100 has every cubic feet of the particle of maximum 100 0.5 μ m granularities, and grade 10 has every cubic feet of the particle of maximum 10 same particle sizes.Yet if it is very low to consider that this kind non-weaving cloth is compared cost with knitted fabric, it is desired using this non-weaving cloth.
E.I.Du Pont Company has carried out a large amount of explorations for the developing low-cost non-weaving cloth, especially for clean room wiping purposes.Such as Sontara And so on cloth normally adopt water thorn (hydroentangled) manufactured, for example be disclosed in the United States Patent (USP) 3,485,706 of authorizing Evans, for referencial use in these receipts.The spun laced fabric that 100% polyester constitutes it is found that being not suitable for clean room uses, because their hydrophobicitys are too big.Make cloth accept surfactant by washing, can give the cloth hydrophily, solid but spun laced fabric is not enough to usually to bearing this kind washing.Washing can cause cloth to fluff and fiber looses takes off.When adding adhesive when improving its durability in spun laced fabric, the hydrophily of cloth is not enough to satisfy the requirement of rag.
Summary of the invention
The present invention relates to a kind of Wiping material that contains polyester non-woven fabric, it has passed through the dust free room washing and has been applicable to grade 10 or cleaner dust free room.The invention still further relates to a kind of method of wiping clean grade 10 or cleaner dust free room with non-weaving cloth.
Detailed Description Of The Invention
Have now found that, adopt the result of the dynamic test assessment cloth newly developed that interrelates with actual wiping process to show that some non-weaving cloth is for example based on Sontara , will equal or exceed the performance of knitted fabric.Also find some type Sontara in addition Cloth obtains the outstanding clean performance of wiping after washing through dust free room astoundingly.Rag has 3 key factors at least when strict clean surface is removed liquid, no matter this liquid is deliberately to be added to the surface to go up so that clean, perhaps it only exists because of overflowing to spill.The 1st is the dynamic efficiency that rag can absorb liquid.The 2nd, overflow and to spill in the thing (or by on surface of wiping) already present numbers of particles and to clean the degree that these particles are eliminated in the process.The 3rd, stay by the particle on the wipe surfaces and fiber values about rag itself and to get the very consideration of reality.
Have now found that the surface that the dust free room rag of being made by the cloth with remarkable " wipe and do the surface " ability is nuzzled up is not than there being the cleaner of this ability, spill the residual contaminants that thing causes and be suspended in usually in the liquid phase that stays on the wipe surfaces because overflow.Conclusion is, drying never only is to see it is the ideal characterisitics of dust free room rag material from the angle of cleaning the room, and is to wipe clean dirty liquid to overflow and spill thing, furtherly, and from the key feature of surperficial eliminating particle.
Confirm that now when selecting to remove the Wiping material of liquid from the surface, the ability that the intrinsic cleannes of Wiping material (performance according to the particle load amount prediction that has existed in the rag) are dried the surface not as same Wiping material is important like that.
Common testing methods
The existing many test of cloth that be used to assess as the applicability of dust free room Wiping material.Some step is conceived to the functional characteristic of Wiping material, is intended to its absorbent properties, and particularly the speed and capacity of rag absorption liquid carries out quantitatively.Other tests then relate to the performance relevant with the cleannes of rag, particularly measure the particle that exists or produced by rag as the response of applied stress or the number of fiber.
The Wiping material absorbent properties are being carried out in the middle of the quantitative test, use the widest some can be seen in " the way RP-004.2 of suggestion " (Recommended Practice RP-004.2) " assessment of the Wiping material that dust free room and other controlled environment use ", IES-RP-CC004.2, institute of Research of Environmental Sciences, 940 East Northwest Highway, MountProspect, IL 60056 (1992).This research adopts this test to come the quantitatively intrinsic absorptive capacity of the Wiping material of assessing.
Yet, also there are other methods, comprising:
INDA code test 10.1-95, " mensuration of soak time, absorptive capacity and wicking rate ", INDA (nonwovens industry association) (Association of the NonwovenFabrics Industry), 1300 Crescent Green, Suite 125, Cary, NC27511 describes hanging basket test and wicking rate test.
" rag that dust free room and controlled environment use " IES-RP-CC004-87-T, institute of Research of Environmental Sciences, 940 East Northeast Highway, Mount Prospect, IL60056 (1987) describes the test of half soak time.
AATCC side religious name 79-1992, " absorbability of bleaching textiles ", " AATCC technical manual ", textile chemistry and dyer are done NAB National Association 0f Broadcasters (Association of TextileChemists and Colorists), 68,106 (1993), water drop test is described.
Miller, B. and Tyomkin, I, " textile research magazine " (Textile ResearchJournal), 54,708 (1984), and Painter, E.V., " TAPPI ", and 68 (12), 54 (1985), the absorption test (GATS) that requires is described.
Though all these tests can both be distinguished them according to the ability of Wiping material (also claiming rag) absorption liquid, what these tests were described is the static properties basically of rag.Neither one adopts dynamical fashion directly or indirectly in the middle of them, and in other words, at pressure with under such condition that may exist during being similar to manual wiping operation, the research rag is removed the ability of liquid from the surface.
During the craft of drying a beach fluid with rag was dried, liquid was inhaled in the cloth.Yet meanwhile, other power may react on this absorption process.For example, applied pressure can block absorption or force the liquid that has sucked to flow out rag during the wiping.Also have, capillary difference can influence the distribution of liquid between rag and this surface.Not all rag can both " be wiped dried ", even when surpassing the absorptive capacity that they measure according to all those static tests as mentioned above as yet.This is especially true under the situation of the article of being made by hydrophobic synthetic polymer, and they usually stay water mark or water droplet behind manual wiping operation.
In the process of the assessment cleannes of Wiping material with regard to particle, main notice normally concentrates on to be measured in the rag or exists how many particles on the rag or how many applying of particle stress are arranged and come off from rag.Although in some early stage test, rag is tested with dry state, present generally accepted way is that the generation of particle, collection and counting are all finished under rag is in hygrometric state.
Two kinds of following methods are to use the most extensively in the middle of these hygrometric states tests.The 1st is to measure caducous numbers of particles on the rag surface, can be seen in Mattina, C.F. and Paley, S.J., " Wiping material is assessed to the potentiality of cleaning ambient contribution particle: a kind of method of novelty ", " particle 2 in the liquids and gases: characterize and identify and control ", editor K.L.Mittal, 117～128, Plenum publishing company, New York (1990).The 2nd kind of method relates to the characteristic drafting corresponding to every kind of rag, can be seen in Mattina C.F. and Paley, S.J., " Wiping material is assessed to the potentiality of cleaning ambient contribution particle: draw stress-strain diagram ", IES magazine, 34 (5), 21 (1991) and Oathout, J.Marshall and Mattina, Charles F., " comparison of relevant function of commercially available dust free room Wiping material and cleannes performance ", the IES magazine, 38 (1), 41 (1995).These methods show that particles are how to produce because of the applying of mechanical energy of known quantity.
Another kind of test, wherein rag is placed on the twin shaft oscillator in the liquid and vibrates, be described in " rag that uses in dust free room and the controlled environment " IES-RP-CC004-87-T, institute of Research of Environmental Sciences, 940 East Northeast Highway, Mount Prospect, IL60056 (1987) also obtains application to a certain degree.The modification of this method is stated from AtterburyO., Bhattacharjee H.R., Cooper D.W., Dominique J.R., PaleyS.J., Siegerman H., " setting up the dust free room rag assessment of performance standard ", Micro, 51,5 (1998), it has comprised the adding surfactant, adopts scanning electronic microscope to grain count subsequently again.It is said that but this is the stress that runs between the actual operating period of simulation better for than above-mentioned release particles test, yet the energy size of being given by this kind vibration belongs to the unknown.
At this, receive all these test methods for referencial use.
Test method of the present invention
The method of ability that the assessment cloth is dried the surface has only few in number several.
Macfarlane, K., " assessment of wiping properties ", and IDEA ' 98 (INDA) collection of thesis (Proceedings of IDEA ' 98 (INDA)), 12.1 (1998) have described a kind of like this test.Some aspect of Macfarlane test is used to develop dynamic wiping efficiency test, and is as described below.
Mattina C.F., McBride J., " cleannes of wiping rear surface: the relation of the solvent volume of residual particles number and rag and use " of Nobile D. and Turner K., the conference collection of thesis, dust free room ' 96 East, 183 (1996), provide rag and produce and stay particle data on the clean surface, this moment, these rags accepted to be equivalent to the experimental liquid of the different increments of its absorptive capacity.When rag was subjected to the test of the liquid volume lacked than its absorptive capacity, the particle that then stays was fewer, but what be stark contrast is that when surpassing their ability, all rags it is found that the particle that all stays remarkable quantity.Surprisingly, no matter form or structure, in case experimental liquid surpasses the rag absorptive capacity, it is obviously close that the numbers of particles that rag stays will become.Traditional view can say that the cloth of what is called " cleaning " will stay the particle that is less than what is called " dirty " cloth with being directly proportional.Yet rag is very important from the ability of surface removing liquid according to observations, because have only when rag stays liquid, just has a large amount of particles and stays.
Some key element of people's such as Mattina method is used to develop the 2nd test, is used for the numbers of particles that stays on definite dynamic wiping rear surface.When the particle from the external particle source was included in this liquid pilot wittingly, this test was known as clearance of particles ability (PRA) test.
The details of new test method will be explained below.
Dynamic wiping efficient
As mentioned above, Macfarlane equipment and step have been made the modification of several aspects.Wiping speed adopts 25cm/s, because than the more approaching reality of 50cm/s.Use the stainless steel pallet of a kind of 50cm, minister 45cm in it, this reserves the free distance of about 36cm in a 1kg slide plate (sled) front.The size of this slide plate vestige is to be 114mm on one side, thereby can hold the Wiping material that is formed through 1/4th doublings by prevailing size 229mm * 229mm (9 inches * 9 inches).
The single experimental liquid that replaces 1mL water to constitute adopts the multiple different volume that is up to the about 130% rag absorptive capacity of weighing by intrinsic absorptive capacity.By this kind mode, requirement can be drawn the efficiency curve of any rag, as the function of the absorptive capacity of the volume of experimental liquid or rag.
Replacement directly is put into cloth and slide plate on the hydrops, waits for that then the enough time begins reciprocal wiping again, but experimental liquid is placed on the slide plate front, slide plate is moved to and by hydrops, this can more approachingly wipe and do the true phenomenon of overflowing and spilling thing.
The equipment that adopts is as follows:
Balance: top-loaded, band cover, but 0.01g reading dial:
Stainless steel, inside dimension 45cm * 28cm * 7cm is large enough to hold wherein the water to grain count; Detailed description sees below
Slide plate: stainless steel, 1kg, 114mm * 114mm bottom; The leading edge of slide plate bottom bend forms projection, utilizes the clip that spring is housed to fix 1/4th folding samples on projection.A stainless steel screw is being fixed on the every limit of outward flange that exceeds slide plate at crooked leading edge.
Distributor: Brinkmann Bottletop Buret, model 25, be used for can reappear ground, feed fluid volume accurately.
Water: be convenient meter (not requiring), here and every grain count local adopt identical clean water without exception; Face is described as follows.
Equipment: a polyester line is fixed on the stainless steel screw of slide plate, forms the yoke shape.The 2nd polyester line (about 4 feet long) is fixed on the mid point of yoke.This root line is used for dragging slide plate with the speed of about 25cm/s with hand.
It should be understood that to use and be equal to or about similar equipment to above-mentioned.
Step is as follows:
1. (nominal dimension 229 * 229mm) is folded into four/in the lump and measures its dry state mass M the individual layer Wiping material d, be accurate to 0.01g.
2. be clipped on the slide plate being folded into 1/4th rag with clip, make single convexity folding point be in leading edge.
3. slide plate is placed on an end of stainless steel pallet, makes the axis of leading edge perpendicular to the pallet length direction.
4. if still do not know the intrinsic absorptive capacity A of rag i, just adopt the step of the IEST-RP-CC004.2 of above-referenced measuring this value on the layer of material in addition.Calculated value A from each rag iCan calculate every layer of capacity A of each rag with the quality testing value Ip[mL/g].Why need this numerical value, be for grasp each liquid pilot volume represent absorptive capacity what/one.
With distributor with volume required test water V cPut into pallet, apart from about 1～2 centimeters of slide plate leading edge.
6. utilize the polyester line with the speed of about 25cm/s with slide plate dragged water and along the major axis of pallet dragged one section about 36cm distance (free distance in slide plate the place ahead, thus slot milling so that mention slide plate and rag, and the unlikely projection of running into pallet).Utilize the polyester line to mention slide plate slide plate and rag are taken out from pallet, stable action in the middle of this and rapidly.
7. take off folding rag from slide plate, determine its wet quality m w, and obtain the quality that is sucked by difference.Utilize the density (0.997g/mL, 25 ℃) of water to calculate the volume v that sucks water sCalculate dynamic wiping efficient DWE: promptly, suck water volume v sDivided by test water volume v c, change percentage then into:
DWE＝100[(m w-m d)/0.997]/v c＝100v s/v c
DWE can be expressed as the absolute volume v of experimental liquid cFunction, also can be expressed as with respect to A iThe function of experimental liquid.Experimental liquid is expressed as 100v relatively c/ A Ip
The clearance of particles ability
Be to weigh the ability of rag, described some that is used for quantitatively coming from rag and stays lip-deep numbers of particles of people such as dynamic wiping efficiency test and top Mattina tested key element combine from surperficial eliminating particle.Difference is that the dose known amounts polystyrene spheres is added in the experimental liquid, also has, and adopt to be folded into 1/4th sample and to replace not folding sample.The result who is drawn by such step is known as " clearance of particles ability " or PRA.For all practical purposes, DWE and PRA test are tests, carry out respectively by adding or do not add particle in experimental liquid.
Be folded into 1/4th rag (describedly be fixed on the slide plate bottom surface and dragged cleaning stainless steel pallet) and dragged water test liquid, the polystyrene spheres of be scattered here and there in the water known granularity and concentration according to top.After slide plate and rag take out from pallet, the particle and the liquid dispersion of staying on the pallet are also counted with the discrete particle counter in clean water.The granule number that experimental liquid stays is respectively to the volume v of experimental liquid cWith experimental liquid 100v to the percentage that is expressed as the rag absorptive capacity cA IpMapping.
In this test water, be metered into the bead (about 10 * 10 of suitable big figure 6), thereby in wiping and after diluting thereupon, will stay the bead of enough numbers, so that can come with the background count difference of clean water.Be convenient meter, select the bead of diameter 1.59 μ m, so that can in 1.0～3.0 μ m passages of discrete particle counter, detect safely.Bead utilizes the microlitre syringe to emit, and its piston can be regulated until 10 * 10 step by step 6Individual bead is all reproducibly emitted.This part work is finished (Atmos Tech, model 6302) by horizontal laminar flow cleaning station.The air that this work station produces, in use by discrete particle counter (Met One, model 227) monitored, this air should always be kept the requirement (0.5 μ m) that meets grade 10 or more clean, as what stipulate among Federal Specification 209E " floating particle cleannes grade in dust free room and the clear area " 1992-09-11.
Except material and facility described above, also use following article:
Bead: polystyrene, particle deposition standard, Duke Scientific Surf-CalScanner, PD 1600,1.59 μ m, concentration 3 * 10 8/ mL.
Syringe: Hamilton, 50 μ L
Water: the Millipore system, form by reverse osmosis unit (Milli-RO 10 Plus), a cover filter and ion exchange bed (Milli-Q UF Plus) device and at the 0.2 μ m filter (Millipak 40) that uses the some place.
Particle collector: PMS Microlaser Particle Spectrometer (μ LPS) is equipped with the corrosive liquids sampler, model 200
Step is as follows:
1. the cleaning stainless steel disc is also measured the background concn of the 1000mL volume water particle of wherein putting into (1.0～3.0 μ m).
2. (nominal dimension 229 * 229mm) is folded into four/in the lump and measures its quality m with the individual layer Wiping material d, be accurate to 0.01g.
3. be clipped on the slide plate being folded into 1/4th rag with clip, make single convexity folding point be in leading edge.
4. slide plate is placed on an end of stainless steel pallet, makes leading edge perpendicular to the pallet length azimuth axis.
5. adopt the microlitre syringe that the particle trier is put into apart from several centimeters of slide plate leading edge.
6. adopt distributor with volume required test water V cBe put into above the particle.
7. the distance of with the speed of about 25cm/s slide plate being dragged water and dragging one section about 36cm along the major axis of pallet with the polyester line.From pallet, take out slide plate.
8. take off folding rag from slide plate, by one section described such its DWE that measures in front.
9. the clean water with known volume joins (200mL～1000mL is more convenient) in the pallet, and measures the granule density of 1.0 μ m～3.0 mu m ranges; Just can determine the numbers of particles that stays by experimental liquid after the subtracting background concentration.
10. for different v cValue repeats aforesaid operations.
11. calculate every kind of v cUnder the value, the numbers of particles that clearance of particles ability (PRA), experimental liquid stay (comprising some contributions) from rag.
PRA can be expressed as the absolute volume v of experimental liquid cFunction and be expressed as with respect to A iThe function of experimental liquid.Experimental liquid is expressed as 100v relatively c/ A Ip
Embodiment 1～9
Following material carries out dynamic test method, and the result of acquisition is stated from thereafter.
Embodiment 1 is DURX TM670, the no decorative pattern non-weaving cloth of water thorn constitutes average basis weight 70.6g/m by 55% wood pulp and 45% polyethylene terephthalate 2This material can (Great Barrington MA) buys by Berkshire company.
Embodiment 2 is MICROFIRST TM, water thorn, the wounded in the battle line non-weaving cloth of 24-order constitute average basis weight 54.2g/m by 45% wood pulp and 55% polyethylene terephthalate 2This material can be buied by Berkshire company.
Comparative Examples 3 is SUPERPOLX 1200 TM, a kind of knitted fabric of dust free room washing is made of average basis weight 154g/m 100% polyethylene terephthalate 2, the edge is heat seal not.This material can be buied by Berkshire company.
Embodiment 4 is DyNamix TM4990Q, water thorn, the wounded in the battle line non-weaving cloth of 40-order constitute average basis weight 75.2g/m by 42% cellulose fiber by solvent method (lyocell) and 58% polyethylene terephthalate 2This material can be buied by Berkshire company.
Embodiment 5 is DyNamix TM6900Q, the spun laced fabric of dust free room washing is made of average basis weight 112g/m 100% polyethylene terephthalate 2The raw material non-weaving cloth is Sontara 8007, it has been carried out dust free room washing as described below.This washed material DyNamix TM6900Q can be buied by Berkshire company.
Comparative Examples 6 is TexWipe TX309, a kind of Woven fabric is made of average basis weight 173g/m 100% cotton 2This material can (Upper SaddleRiver NJ) buys by Texwipe company.
Comparative Examples 7 is Alpha 10 TX1010, a kind of knitted fabric of dust free room washing is made of average basis weight 141g/m 100% polyethylene terephthalate 2And the edge is heat seal.This material can be buied by Texwipe company.
Comparative Examples 8 is PROWIPE 880, and a kind of spunbond cloth is made of average basis weight 85.9g/m 100% polypropylene 2This material can be buied by Berkshire company.
Embodiment 9 is DyNamix TM5900Q, a kind of spun laced fabric is made of average basis weight 102g/m 100% cellulose fiber by solvent method 2This material can be buied by Berkshire company.
About the dust free room washing, those skilled in the art use various circulation.Have now found that, use at least about 102g/m 2The cloth of higher basis weights can tolerate the circulation of dust free room washing/drying.This process is included in the system of hot water (minimum 120 (49 ℃)) and non-ionic surface active agent (about 1.8 gallons waters/pound cloth (15L/kg)) and stirs cloth.Hot water has passed through the purification that reverse osmosis is handled, and has the electrical conductivity of 4～6 μ Ω (micromhos)/cm.Cloth is with washed with de-ionized water (about 1.2 gallons waters/pound cloth (10L/kg)).The deionization resistivity of water is about 18M Ω/cm.These 2 kinds of water all are filled into 0.2 μ m.Whole wash time is limited in and is about 40min most.
But each sample has all been measured absorptive capacity and release particles, adopts the Po test, referring to IEST-RP-CC0004.2.During the result is provided in the table below.It should be appreciated that following result is for the particle of 1～3 mu m range.Absorptive capacity is represented with mL/g; But release particles is with 10 6/ m 2Expression.
Table 1
But embodiment basic weight absorptive capacity release particles
(g/m 2) (mL/g) (10 6/m 2)
1 70.6 4.36 1.53
2 54.2 5.26 1.13
3 154 3.13 1.00
4 75.2 5.42 0.341
5 112 3.89 0.830
6 173 1.48 24.8
7 141 2.58 0.663
8 85.9 5.20 1.89
9 102 6.48 2.84
Adopt above-described method to measure the DWE of sample.Most of rags with 2.00,5.00,10.0,15.0,20.0 and 30.0mL volume and calculating the volume that substantially exceeds (about 130%) corresponding rag absorptive capacity is tested.Be easy meter,, only provided the situation of the test volume of 10mL and about 130% absorptive capacity this part sample.By the absorptive capacity divided by single layer the experimental liquid volume being scaled with the ability is the percentage of benchmark.Provide the amount of liquid of every kind of actual suction of sample, also it has been expressed as the percentage of experimental liquid volume.Table 2 and 3 provides the data of the experimental liquid volume of 10mL and about 130% absorptive capacity respectively.
Table 2
Embodiment Capacity The % capacity The liquid soakage
ML/ layer 10mL mL %
1 15.6 64.1 9.41 94.1
2 14.4 69.4 8.96 89.6
3 23.5 42.6 9.89 98.9
4 21.3 46.9 9.18 91.8
5 22.4 44.6 9.84 98.4
6 12.3 81.3 8.38 83.8
7 16.3 61.3 8.40 84.0
8 23.4 42.7 4.35 43.5
9 34.8 28.7 9.90 99.0
Table 3
Embodiment Layer capacity A Ip Test(ing) liquid The liquid soakage
ML/ layer mL % mL %
1 15.6 20.0 128 15.6 78.0
2 14.4 20.0 138 15.7 78.5
3 23.5 30.0 128 25.4 84.7
4 21.3 27.0 128 22.7 84.0
5 22.4 29.0 129 203 70.0
6 12.3 16.0 130 11.3 70.6
7 16.3 21.0 129 16.8 80.0
8 23.4 30.0 128 7.70 25.7
9 34.8 45.0 129 35.7 79.3
The PRA of described method test sample above adopting.Rag is to test with the equal volume series described in the DWE test, and different is to be metered into 10 in every kind of test volume 7Polystyrene sphere.The result of the test volume of 10mL and about 130% absorptive capacity number with residual particles in table 4 is represented.Same data are expressed as the expression that the percentage that is removed particle just draws clearance of particles efficient (PRE).These data of explaining again are shown in Table 5.
Table 4
2mL 5mL 10mL 15mL 20mL 30mL 130% capacity
1 3.2 25 41 43 200 - 200
2 4.5 8.9 78 98 170 - 170
3 51 59 73 92 98 340 340
4 5.7 5.7 8.6 50 53 - 103
5 5.7 11 11 19 22 - 315
6 1?8 16 56 - - - 759
7 140 160 210 180 - - 333
8 280 460 620 740 2800 3100 3100
9 0.6 - 3.9 - 11 7.8 180
Table 5
2mL 5mL 10mL 15mL 20mL 30mL 130% capacity
1 99.97 99.75 99.59 99.57 98.00 - 98.00
2 99.96 99.91 99.22 99.02 98.30 - 98.30
3 99.49 99.41 99.27 99.08 99.02 96.60 96.60
4 99.94 99.94 99.9?1 99.50 99.47 - 98.97
5 99.94 99.89 99.89 99.81 99.78 - 96.85
6 99.82 99.84 99.43 - - - 92.41
7 98.60 98.60 97.90 98.17 - - 96.67
8 97.16 95.35 93.80 92.60 72.2 69.00 69.00
9 99.99 - 99.96 - 99.89 99.92 98.20
Find that embodiment 5 shows the extraordinary performance that helps clean room wiping purposes, particularly as method detected by newly developed.Also have, the water thorn cellulose fiber by solvent method cloth of embodiment 9 it is found that it is fabulous candidate's cloth of clean room purposes, particularly aspect dynamic wiping efficient (DWE).And then, clearance of particles ability (PRA) result of the test shows, the spun laced fabric of slurry/polyester (embodiment 1 and 2) and cellulose fiber by solvent method/polyester (embodiment 4) has surprising higher grade, particularly when detecting with the experimental liquid volume that surpasses the intrinsic absorptive capacity of this material.These embodiment of low-cost spun laced fabric represent general wiping purposes, especially for the marked improvement of clean room purposes aspect.Non-weaving cloth of the present invention equals, and usually surpasses the performance of knitted fabric in the Comparative Examples that is regarded as industrial standard so far, particularly in the dust free room purposes.
Be also noted that the melt-blowing nonwoven with basic continuous filament yarn polymer fiber also is applicable to the present invention.This kind cloth as knitted fabric above-mentioned, also has continuous filament yarn.This polymer fiber can be polyester or polypropylene or polyester and polyacrylic bicomponent fiber, is all as the assignee that E.I.Du Pont Company, 1999-12-20 submit to, common unsettled U.S. Patent application file (case SS-2911) is described.
Embodiment 10～13
The embodiment of the invention 10 is the DyNamix that wash as the dust free room that top embodiment 5 uses TM6900QL.Comparative Examples 11 is Sontara 8007 types, the cloth with embodiment 10 is identical basically, and just it washs without dust free room.Comparative Examples 12 is Sontara 8000 types have 39.9g/m 2Low basic weight, without washing but carried out handling to improve its absorbent properties with surfactant.Comparative Examples 13 is SUPERPOLX 1200, and is a kind of as top embodiment 3, through the polyester knitted of dust free room washing.
The sample of these embodiment adopts test described above to carry out various static propertiess, and DWE and PRA test.The result is stated from the table 6.
Table 6
Embodiment 10 11 12 13
Basic weight, g/m 2113 110 39.9 142
Fiber number/cm 21.3 4.2 24 0.26
Granule number
Dual-axis vibration, 10 6/ m 218 10 270 16
Absorbability, cc/m 2627 510 232 469
Than absorbability, cc/g 5.5 4.6 5.8 3.3
Half soak time, s 1＞300 21
Ion, ppm
Sodium 0.5 8.4 66 0.31
Potassium 0.16 1.4 2.3 0.12
Calcium 0.16 22 18 0.11
DWE, 10mL experimental liquid, 98.4 25 1 layers 3 layers 98.9 of %
94.7 99.7
PRA, 10mL experimental liquid, 11 5,310 1 layers 3 layers 73
10 3Individual particle is stayed surface 498 13.6
The embodiment of the invention 10 shows excellent cleannes data, hangs down hair and excellent absorbability.Aspect ionic soil, it also is better than unwashed embodiment.
Comparative Examples 11 from dual-axis vibration numbers of particles cleannes still can, but show moderate to highly falling hair, and the non-constant of absorbability.
Comparative Examples 12 is relative deficiency aspect particulate load, absorptive capacity and speed, extractable matter and ion load.Though the processing of carrying out with surfactant helps to improve absorbability, cause relatively large undesirable ion.Yet surprisingly, when being used for three-decker, this cloth shows the PRA near the embodiment of the invention 10.
Comparative Examples 13 from dual-axis vibration granule number and number of ions near cloth of the present invention.Owing to be continuous filament yarn, so it is hanging down cant face excellence, but good like that not as cloth of the present invention aspect absorptive capacity.
The result of clearance of particles ability shows that the cloth of the present invention of embodiment 10 has excellent cleaning capacity, and it is from 10 7Only stay 11,000 in the middle of the individual particle, by contrast, it does not wash counterpart---and Comparative Examples 11 but stays 5.3 * 10 6Individual particle.Particularly importantly, the performance of embodiment 10 surpasses the Comparative Examples 13 that stays 73,000 particles in its back vestige.Especially surprisingly, cloth of the present invention combine the excellent cleannes performance determined by the traditional static method and excellent absorption properties and excellence clearance of particles ability (function cleaning degree).

Claims (15)

1. one kind is adopted the non-weaving cloth wiping to be determined as the method for grade 10 or cleaner dust free room by FED-STD-209E, and wherein cloth comprises the fiber of polyester, cellulose fiber by solvent method and polyester and cellulose fiber by solvent method blend.
2. the process of claim 1 wherein that cloth is that dynamic wiping efficient under the condition of 10ml is 89% at least at test volume.
3. the process of claim 1 wherein that cloth is 70% representing the dynamic wiping efficient under the test volume condition of cloth absorptive capacity 130% at least.
4. the process of claim 1 wherein that cloth is that clearance of particles efficient under the condition of 10ml is 98% at least at test volume.
5. the process of claim 1 wherein that cloth is 96% representing the clearance of particles efficient under the test volume condition of cloth absorptive capacity 130% at least.
6. the process of claim 1 wherein that non-weaving cloth comprises the cellulose fiber by solvent method of 42wt% and the polyester of 58wt%.
7. claim 1,2,3,4,5 or 6 method, wherein non-weaving cloth is by water thorn manufactured.
8. a Wiping material comprises the polyester non-woven fabric of having washed through dust free room, and this non-weaving cloth is applicable to the dust free room that is at least grade 10 by FED-STD-209E mensuration.
9. Wiping material, the non-weaving cloth that comprises comprises the fiber of the blend that is selected from cellulose fiber by solvent method and polyester and cellulose fiber by solvent method, wherein this non-weaving cloth is applicable to by FED-STD-209E and measures the dust free room that is at least grade 10.
10. claim 8 or 9 Wiping material, wherein non-weaving cloth is the water thorn.
11. the Wiping material of claim 8 or 9, wherein the basic weight of cloth is 102g/m 2Or it is higher.
12. the Wiping material of claim 8 or 9, wherein cloth is that the dynamic wiping efficient under the condition of 10mL is 98% at least at test volume.
13. the Wiping material of claim 8 or 9, wherein cloth is 70% representing the dynamic wiping efficient under the test volume condition of cloth absorptive capacity 130% at least.
14. the Wiping material of claim 8 or 9, wherein cloth is that the clearance of particles efficient under the condition of 10mL is 99% at least at test volume.
15. the Wiping material of claim 8 or 9, wherein cloth is 96% representing the clearance of particles efficient under the test volume condition of cloth absorptive capacity 130% at least.
CNB998148431A 1998-12-21 1999-12-21 Nonwoven fabrics for wiping applications Expired - Fee Related CN1192134C (en)

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CN102170849B (en) * 2008-08-06 2013-08-21 巴斯夫欧洲公司 Fluid-absorbent articles
JP6377399B2 (en) * 2014-04-25 2018-08-22 株式会社イノアックコーポレーション Wiping material
WO2018184043A1 (en) * 2017-04-03 2018-10-11 Lenzing Ag A nonwoven web designed for use in a clean room wipe

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US3485706A (en) * 1968-01-18 1969-12-23 Du Pont Textile-like patterned nonwoven fabrics and their production
US4093190A (en) * 1975-06-25 1978-06-06 Creusot-Loire Process for the protection of a refractory wall in service
US4328279A (en) * 1981-01-29 1982-05-04 Kimberly-Clark Corporation Clean room wiper
US4888229A (en) * 1988-04-08 1989-12-19 The Texwipe Company Wipers for cleanroom use
US5009747A (en) * 1989-06-30 1991-04-23 The Dexter Corporation Water entanglement process and product
US5214821A (en) * 1991-05-07 1993-06-01 The Morgan Crucible Company Plc Low contamination swab employing tubular knit fabric
US5459912A (en) * 1992-03-31 1995-10-24 E. I. Du Pont De Nemours And Company Patterned spunlaced fabrics containing woodpulp and/or woodpulp-like fibers
US5240764A (en) * 1992-05-13 1993-08-31 E. I. Du Pont De Nemours And Company Process for making spunlaced nonwoven fabrics
US5320900A (en) * 1993-08-10 1994-06-14 E. I. Du Pont De Nemours And Company High absorbency cleanroom wipes having low particles
GB2309466B (en) * 1996-01-29 1999-09-08 Courtaulds Fibres A nonwoven fabric

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