CN1161721A - Nonwoven fabric from blends of isotactic and actactic polyolefins - Google Patents
Nonwoven fabric from blends of isotactic and actactic polyolefins Download PDFInfo
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- CN1161721A CN1161721A CN95195748A CN95195748A CN1161721A CN 1161721 A CN1161721 A CN 1161721A CN 95195748 A CN95195748 A CN 95195748A CN 95195748 A CN95195748 A CN 95195748A CN 1161721 A CN1161721 A CN 1161721A
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Abstract
There is provided a nonwoven fabric comprising a layer of a nonwoven web comprising filaments prepared from a thermoplastic polymer. The thermoplastic polymer is a blend of at least one isotactic polymer having an isotacticity of at least 85, up to 40% by weight of at least one atactic polymer having an isotacticity of less than 20, and the blend may also have a fluorocarbon in an amount between about 0.1 and 3.0% by weight. The fabric may be produced by the spunbonding and meltblowing processes and has good strength, barrier and softness.
Description
Background of invention
Supatex fabric is widely used in from baby's wiper and diaper among the various application of automobile cover.All these application requirements materials have all performances and characteristic.Some application need, for example high wettable supatex fabric, i.e. the liquid supatex fabric that can pass through fast such as the liner of diaper and women sanitary articles, and other application requirements high strength and high repellency, for example outdoor fabrics and surgery fabric.What the present invention relates to is back one series products, specifically, relates to and both has good intensity, has the supatex fabric of highly-breathable and anti-liquid penetration again.
Surgery must have good liquid barrier property with fabric such as surgery apparel, in case the medical worker contacts with patient's body fluid, also must be breathable, so that wearer's sweat keeps comfortable by fabric.Fabric also must have the brute force that is enough to finish required function in the environment that matches, and also should be soft and can dangle, so that the wearer is comfortable, and does not limit its range of movement.
In many application of supatex fabric, for example clothes it is also important that with frivolous as far as possible finished product and finishes needed function.The frivolous clothes of finishing thick and heavy clothes identical function can make the wearer more comfortable, and less because produce its needed raw material, may make also more cheap
The fabric that the frivolous softness good, that intensity is high is transmitted in liquid barrier property height, vaporization will be widely used in the various uses.
So the purpose of this invention is to provide a kind of have high liquid barrier property, good vaporization transitivity and high strength flexible nonwoven laminate.
General introduction
In order to reach purpose of the present invention, a kind of supatex fabric that comprises one deck nonwoven web is provided, this nonwoven web comprises the silk by a kind of thermoplastic polymer preparation, and wherein this thermoplastic polymer is a kind of blend of being made up of at least a isotactic polymer and at least a atactic polymer.The isotacticity of isotactic polymer should be at least 85, and the isotacticity of atactic polymer should be below 20.This blend can contain the atactic polymer of 40% weight at the most.This blend also can contain the fluorocarbon of 0.1～3.0% weight of having an appointment.This fabric can adopt for example spun-bond process and meltblown production, but preferred meltblown.
Summary of the invention
Definition
It is that put the mutual shop of single fiber or silk that term used herein " supatex fabric or fiber web " means structure, rather than resembles and spread a kind of fiber web of putting in the identifiable mode of rule the knitted fabric.Supatex fabric or fiber web now can be made in many ways, for example meltblown, spun-bond process and carded web Method for bonding.The Unit Weight of supatex fabric represents that with the ounce number (osy) of every square yard of material or with every square metre gram number (gsm) the fiber effective diameter is represented with micron usually usually.(annotate: the method that is converted into gsm from osy is osy * 33.91).
Term used herein " microfiber " means average diameter and is not more than about 50 microns small diameter fibers, and for example: average diameter is about 0.5～50 micron, and perhaps more particularly, the desirable average diameter of microfiber is about 2～40 microns.
Term as used herein " spun-bonded fibre " refers to pushes out the diameter very little fiber that form with the form of long filament with molten thermoplastic from the many thin capillary with extruding filament diameter that is generally circle of spinnerets, handle rapidly then, for example people's such as Appel United States Patent (USP) 4,340 by the described method of following patent, 563, people's such as Dorschner United States Patent (USP) 3,692,618, people's such as Matsuki United States Patent (USP) 3,802,817, the United States Patent (USP) 3 of Kinney, 338,992 and 3,341,394, the United States Patent (USP) 3 of Levy, 502,763 and 3,909,009, and people's such as Dobo United States Patent (USP) 3,542,615.Spun-bonded fibre is normally continuous, and diameter is greater than 7 microns, and more particularly, average diameter is greater than 10 microns.
Term as used herein " meltblown fibers " means the fiber that forms as follows, molten thermoplastic is extruded through many spinning head capillaries thin, that be generally circle, form with fused fiber or silk enters in the at a high speed common heated air stream (for example air) of convergence, make the silk of molten thermoplastic attenuate and reduce its diameter, can reach the microfiber diameter.After this, high velocity air carries meltblown fibers, places one to collect on the surface, forms the meltblown fiber web of random.Melt-blown process is well-known in the art, and this technology is disclosed in the following patent, the United States Patent (USP) 3,849,241 of Buntin for example, people's such as people's such as Meitner United States Patent (USP) 4,307,143 and Wisneski United States Patent (USP) 4,707,398.Meltblown fibers can be discontinuous or continuous microfiber, and its diameter is usually less than 10 microns.
Term as used herein " polymer " generally includes, but is not limited to, and homopolymers, copolymer be the blend and the modifier of block, grafting, random and alternate copolymer, terpolymer etc. and any aforementioned polymer for example.In addition, unless in addition special restriction, term " polymer " " comprise the material of all possible geometric configuration.These junction types comprise, but are not limited to isotactic, rule and random symmetries.
Term as used herein " bicomponent fiber " refers to be extruded two kinds of polymer at least from each extruder, and they are spun into a formed fiber of fiber together.The structure of this bicomponent fiber for example can be: a kind of polymer is arranged around the skin/core of another kind of polymer, perhaps can be to arrange side by side or arrange for " island ".People's such as people's such as Kaneko United States Patent (USP) 5,108,820, Strack United States Patent (USP) 5,336,552 and Europe patent 0,586,924 have been narrated bicomponent fiber.The ratio of polymer is 75/25,50/50,25/75 or the ratio of any other requirement.
Term as used herein " biconstitutent fibre " refers to the fiber that at least two kinds of polymer extruding with the form of blend from same extruder form.Biconstitutent fibre is sometimes referred to as multi-constituent fibre.This universal fiber for example in the United States Patent (USP) 5,108,827 of Gessner, has and describes in detail.
Term used herein " blend " means two or more mixture of polymers, and term " alloy " means a subclass of blend, and wherein each component is non-miscible, but by compatible." miscibility " and " immiscibility " is defined as having negative value respectively and on the occasion of the blend of the free energy of mixing.In addition, " compatible role " is defined as for alloying, generally impels the compatilizer of polyblend or other material by use, improves the process of the interface performance of immiscible blend polymer.
Term as used herein " bonding window " mean supatex fabric by the calender pressure roller temperature range of the employed calender pressure roller that successfully is bonded together.For polypropylene, this bonding window generally is about 270～310 °F (132～154 ℃).About below 270 °F, polypropylene is not heated to and is enough to melt bondedly, and about more than 310 °F, polypropylene is can fusion excessive, so that the pressure roller of the calender that can bond.Poly bonding window is narrower.
Term as used herein " machine direction " or MD mean the fabric length direction that obtains along with producing fabric.Term " transverse machine " or CD mean the width of fabric direction, promptly are often referred to the direction perpendicular to MD.
Term as used herein " constriction " or " neck stretched " are general, all refer to a kind of method that supatex fabric is elongated on machine direction usually, so that its width is reduced to needed numerical value in the mode of controlling.This control stretching can be carried out under chilly, room temperature or higher temperature, and the increase that it is limited in the overall size on the draw direction can reach and makes the fabric needed elongation of rupturing, and in many cases, this elongation is about 1.2～1.4 times.When lax, fiber web shrinks towards its life size direction.A kind of like this method is disclosed in, the United States Patent (USP) 4,443,513 of Meitner and Notheis for example, and another kind of method is disclosed in the United States Patent (USP) 4,965,122 of Morman.
Term as used herein " constriction softnessization " means when material stretches on machine direction, and under the condition that does not heat, at room temperature promptly, to the neck stretched that material carries out, this is the stretching on machine direction.In neck stretched or constriction softnessization, the fabric of indication for example is stretched 20%, and this means fabric and stretches on machine direction, until its width be not the stretching former width 80%.
Term as used herein " but neckable material " means can be by any material of constriction.
Term as used herein " neckable material " refers to by such as any material that stretches or wrinkle pleat method has been retracted on the one dimension direction at least.
Term as used herein " answer " refers to uses displacement force certain material that stretches, when displacement force stops, and the contraction of the material that is stretched.For example: if 1 inch long material of lax non-displacement stretches 50%, be stretched to 1.5 inches long, this material has extended 50% so, and its tensile elongation is 150% of a relaxed length.If this demonstration expanded material after removing displacement and tensile force, shrinks, and is returned to 1.1 inches long, material has been replied 80% (0.4 inch) of this elongation so.
" clothes " used herein this speech means the clothes of any kind that can wear.Comprise Work Clothes, underwear, trousers, shirt, jacket, gloves and socks etc. that the industrial work clothes link to each other with clothing.
This term of this paper employed " curable product " means surgery apparel and sterilization retaining curtain, mask, headgear, shoe cover bandage, bandage and sterilization coat etc.
This term of this paper employed " personal-care supplies " means wiper, diaper, gym shorts, moisture absorption underpants, disabled person's articles for use and women sanitary articles etc.
This term of this paper employed " outdoor fabrics " means main, but does not get rid of other, the fabric of outdoor application.The purposes of operable this fabric comprises automobile cover, ship cover, aircraft cover, camper/chase after fabric, furniture cover, tent cloth, canopy, tent, geotextile and outdoor clothes that the shooter uses.
Test method
What degree the mixture of refusing an isopropanol of alcohol experimental measurement soaked the fabric of a horizontal positioned in 5 minutes.In this test, the mixture that a droplet is generally 70% isopropyl alcohol and 30% distilled water places on the fabric.Observe this drop after 5 minutes, measure the degree that fabric is soaked.In fact, this is to finish by this drop and one group of figure that reaches 0～5 grade of various degree that represents that drop soaks on fabric are compared.Zero level is represented to test fabric and is soaked fully, and 5 grades of expression fabrics do not soak substantially.Though how many this tests has subjectivity, it be enough to distinguish refuse alcohol good with refuse the fabric of alcohol difference.
Melt flow rate (MFR): (MFR) be a kind of tolerance of polymer viscosity.MFR represents with the material weight that flows out from the capillary of known dimensions at the appointed time under given load or shearing, according to, for example: ASTM tests 1238 condition E, measures down at 230 ℃, with gram expression in/10 minutes.
Discuss
The field of supatex fabric is various around absorbent item for example diaper, wiper and women sanitary articles and barrier property articles for use such as surgery apparel and sterilization retaining curtain, and bandage.For the application in one field, back, the present inventor has developed a kind of have good liquid-repellant, superior ventilation property and high strength flexible nonwoven laminate.
The fiber of making fabric of the present invention can adopt meltblown well-known in the art or spun-bond process production.These methods are general uses an extruder that molten thermoplastic polymers is added to spinnerets, and polymer becomes fine at this, produces fiber staple length or longer.Then, with this tensile fiber, pneumatic placing on moving foraminate pad or the conveyer belt forms supatex fabric usually.The fiber of producing with spun-bond process and meltblown is the microfiber of above-mentioned definition.
Fabric of the present invention can be applied to multi-layer laminate.An example of multi-layer laminate is people's such as Brock a United States Patent (USP) 4,041,203, people's such as Collier United States Patent (USP) 5,169,706 and the United States Patent (USP) 4 of Bornslaeger, a disclosed embodiment in 374,888, some of them layer be spunbond, some be melt and spray as a kind of spunbond/meltblown/spunbonded (SMS) laminated product.A kind of like this laminated product can be made by the following method, and order is placed nonwoven fabric layer before this on the shaping conveyer belt that moves, and is the meltblown fabric layer then, is another spunbond layer at last, uses following method that this laminated product is bonding again.Perhaps, can make one or more layers fabric separately, superimposed on pressure roller, combination in independent adhesion step again.The Unit Weight of this kind fabric be generally about 0.1～12OSY (6～400gsm), perhaps more particularly, be about 0.75～3OSY.
Usually adopt certain methods that this supatex fabric is bonded together when producing supatex fabric, so that make it have enough structural intergrities, the harsh effect that is subjected in the time of standing further to be processed into final products.Can finish in many ways bonding, for example hy-droentanglement, acupuncture bonding, ultrasonic bonds, adhesive is bonding and heat bonding.
Carrying out the method that ultrasonic bonds adopts is, United States Patent (USP) 4,374, the 888 described methods of Bornslaeger for example are even fabric is by between velocity of sound device and the anvil roller.
With supatex fabric by finishing its heat bonding between the pressure roller of calender.It is heated that calender has a pressure roller at least, and has at least a pressure roller (pressure roller that needn't and heat is same) to have the decorative pattern that can be stamped in by on the supatex fabric between pressure roller.When fabric passed through pressure roller, fabric was under pressure and hot effect.Being combined in of heat that applies with special decorative pattern and pressure produces the hot melt adhesive face in the supatex fabric, at this, the decorative pattern of bounding point is corresponding on the bounding point on the fabric and the calender pressure roller.
The various decorative patterns of calender pressure roller have been developed.The Hansen-Penning decorative pattern of United States Patent (USP) 3,855,046 narration that example is Hansen and Pennings, it has about 10～25% adhesive surfaces, about 100～500 bounding point/inches
2Another kind of highway tread pattern is to have the repetition and the Argyle of eccentric rhombus slightly.
The definite temperature and pressure of the calender of bonded nonwoven fibrous webs depends on makes fibroreticulate thermoplastic.For polyolefin, general preferred temperature is 150～350 °F (66～177 ℃), and preferred pressure is whenever vertical cun 300～1000 pounds, more particularly, for polypropylene, preferred temperature is 270～320 °F (132～160 ℃), and pressure is whenever vertical cun 400～800 pounds.
A tolerance of polymer crystallization degree is the percentage of isotactic polymer to the polymer total amount.Be referred to as isotacticity or isotactic index, can calculate from the nuclear magnetic resonance opisometer of polymer.Another test, about xylene soluble part, the amount of low molecular weight isotactic thing and middle molecular weight atactic thing in the measurement polymer.
The thermoplastic polymer of Shi Yonging is random (amorphous state) polyolefin and the polyolefinic blend of isotactic in the embodiment of this invention.In addition, each of these components all can be the different atactic polymers or the mixture of isotactic polymer.
As everyone knows, in the supatex fabric field, use isotactic polymer.An example of this polymer is Exxon (EXXON) chemical company (Texas, Bei Dun) polypropylene of the isotactic index of selling with trade name PD-3746G about 96%.Other isotactic polymers that are suitable for are the commodity of shell (Shell) chemical company (Texas, Houston) supply Uripol by name
Polymer.For example the Uripol 1208 polyacrylic melt flow rate (MFR)s (MFR) of shell are about 38, and xylene soluble part is about 6%, isotactic index about 97%.Other manufacturers such as Xi Mengte (Himont) chemical company (Delaware State, Wilmington), road (Dow) chemical company (Michigan State, Midland) also produce the isotactic polyolefin that is suitable for.Preferably, the isotacticity of isotactic polymer phase of the present invention is at least 85%.
Can improve the melt flow rate (MFR) of polymer by the method that adds peroxide.People's such as Timmons United States Patent (USP) 5,213,881 has been narrated peroxide joined and has been helped melting and spraying purposes in the polymer.In the patent of Timmons, the peroxide of the highest about 3000ppm is joined in the polymer with the Ziegler-Natta catalyst polymerization.A kind of such polymer is got the reactor grain shape, and molecular weight distribution is 4.0～4.5Mw/Mn before the modification, and melt flow rate (MFR) restrains/10 minutes for about 400 down at 230 ℃.By a kind of like this polymer of peroxide modified, molecular weight distribution is about 2.2～3.5Mw/Mn, and 230 ℃ of following melt flow rate (MFR)s are about 800～5000 grams/10 minutes.For example the PD-3746G of Exxon can be by adding peroxide modified, and becoming melt flow rate (MFR) from 800 modifications of initial melt flow rate is about 2000.Other examples in the patent of Timmons, have been provided.In the embodiment of this invention, the preferred high polymer of melt flow rate (MFR), promptly melt flow rate (MFR) is higher than l000.
Many manufactories produce random or amorphous polyolefin (APo) is used as adhesive and encapsulant.These materials are also referred to as amorphous polyalphaolefin (APAO) sometimes.The isotacticity of this base polymer is below 20%.Present inventors do not find any existing application of amorphous polyolefin in supatex fabric manufacturing field.
Yi Siman (Eastman) chemical company (Tennessee State, this baud of gold) has produced a series of amorphous polyolefins, and its commodity are called Eastoflex
APO.Eastoflex
APO can amorphous polypropylene homopolymers (APP), or amorphous polypropylene-polyethylene and ethylene copolymers (APE) supply, and it some are with the different trade mark of numerals, as P1010 and P1023 (APP), E1010, E1060 and E1200 (APE).These figure notations are that viscosity with 190 ℃ of following polymer is benchmark.For example the viscosity of P1010 is 1000 centipoises, and the viscosity of P1023 is 2250 centipoises, and the viscosity of E1060 is 6000 centipoises.
Rexene company (Texas, Odessa) also can supply amorphous polyolefin, and one piece of article among " adhesive epoch " (the Adhesives Age) that publishes in November, 1992 has been done this to be described in detail.The amorphous polyolefin of Rexene is called Rextac
Poly alpha olefin or RTAPAO, for example the viscosity of RT2535 is 3500mpasec (million milli pascal seconds), the viscosity of RT25 85 is 8500 mpasec.It is the amorphous polyolefin of basic Chu that Rexene produces with ethene, propylene and 1-butylene.
The 3rd source of the amorphous polypropylene that the present inventor finds is Findley adhesive company (state of Wisconsin, the fertile base of mil).The Findley polypropylene that is suitable for is with trade name H-9188 supply, and it is the mixture of the PD-3746G of a kind of 50% weight random polypropylene and 50% weight Exxon, does not contain peroxide.
The isotacticity of Yi Siman, Rexene that is suitable for and the polymer of Findley is below 20%.
Fiber of the present invention can contain isotactic polymer and amorphous polymer mutually, and its percentage composition is amorphous amorphous to 60% weight isotactic and 40% weight from 99% weight isotactic and 1% weight.In addition, according to desired supatex fabric characteristic, isotactic can be respectively the mixture of many isotactics or atactic polymer with random any or two mutually mutually.Because polymer of the present invention is mixable, do not need other compatilizer.
Fiber in the supatex fabric of the present invention can contain fluorocarbon, gives the repellency to low surface tension liquid, and these compounds can be United States Patent (USP)s 5,178, and 931 the 7th hurdles the 40th walk to the 8th hurdle the 60th capable narrated any.A kind of such material is called Zonyl
FTS can obtain from E.I.Du Pont Company (Delaware State, Wilmington).A kind of particularly suitable additive is FX-1801, is called L-10307 in the past, can obtain from 3M company (Minnesota State, Sao Paulo).Be additive M with this material marking in above-mentioned patent, its fusing point is about 130～138 ℃.
The amount that joins the fluorocarbon in the fiber is about 0.1～3.0% weight, more particularly is about 0.25～1.0% weight.Described as cited patent, fluorocarbon is a kind of internal additive, and is different with after-applied additive, and it is along with the shaping of fiber, and migration is to fiber surface according to qualifications.
Can think preferentially migration or be seeped into the surface of fiber of internal additive, so that effectively.Can think that this process is taking place just when fibre forming and in before cooling off fully.The speed of the polymer crystallization that the decisive factor that internal additive moves to the thermoplastic polymer fibers surface is seemingly caused by cooling.The present inventor thinks that crystallization or solid polymer have stopped up, and in other words, has stoped the motion of additive through polymeric matrix, because additive can not arrive the surface mutually through solid; But they do not wish that their invention is limited by this view.The present inventor thinks, by fiber being provided amorphous noncrystalline phase, for additive provides the migration route.Additive through the result that the amorphous migration route that produces in fiber of the present invention moves to the surface is, has the performance in the wonderful good process under this class additive of low concentration.
Fabric of the present invention also can contain the fire retardant that increases apyrous, gives the pigment of every layer of identical or different color and/or the chemicals such as the hindered amine of raising uvioresistant photosensitiveness.Spunbond and melt and spray fire retardant and the pigment that thermoplastic polymer is used in known this area, they can be internal additives.Pigment, if use, content is generally below 5% weight of this layer.
In order to make fabric of the present invention have more special function, also can carry out post processing to it.Be known in the art this class post processing and method of operating thereof, comprise: the antistatic treatment that for example employing is sprayed, the impregnating method is carried out etc.An example of this post processing is to use zelec
Antistatic additive (deriving from E.I.Du Pont Company, the Delaware State, Wilmington).
Also can implement the neck stretched of above-mentioned patents state to fabric of the present invention.Neck stretched or constriction softnessization are used for making fabric sofetening, and can not produce harmful influence to unacceptable degree to the sheet performance.
Be used for production fabric of the present invention, the blend of isotactic and atactic polymer can adopt any method manufacturing known in the art, for example extrude mixing, and this method is polymer is fed extruder, fusion and to extrude with blend.Also can adopt following method with mixed with polymers, with their each granulation, in a bulk container with its mixing, again with they fusions.Because polymer is miscible, be expected at the problem of less than nothing big in the polyblend.
Because need most the cloister fabric that has with the identical performance of heavily fabric usually, so serve as the relatively performance of fabric of the present invention of basis with weight, barrier property and intensity.
Above-mentioned characteristic with following example explanation fabric of the present invention.In all tests, The hole diameter of spinneret is 0.37 millimeter, and the polymer throughput is 0.5 gram/hole/minute (ghm), all in 450 of melt temperatures (232 ℃) spinning down, in all cases, air gap is 90thousands ofan imen inch, and groove structure is 0.148 inch.Employed Exxon PD-3746G is high melt-flow ejector half, promptly uses the peroxide treatment mistake by above-mentioned, but is used to make except the Findley H-9188 that do not contain peroxide the sort of.
Reference examples 1
Adopting meltblown is the fabric of 0.6OSY (20.4gsm) by the polypropylene production unit weight that is called PD-3746G of exxon chemical company supply.Primary air pressure is 5.3 pounds/in2 gauge pressure, and the primary air temperature is 533 °F.According to above-mentioned test method fabric is refused the alcohol test, its grade is shown in table 1.
Reference examples 2
Adopting meltblown is the fabric of 0.5OSY (17gsm) by the polypropylene production unit weight that is called PD-3746G of exxon chemical company supply.This meltblown layer contains the FX-1801 fluorocarbon, and its content is about 1% weight.Primary air pressure is 3.2 pounds/inch
2Gauge pressure, primary air temperature are 565 °F.According to above-mentioned test method fabric is refused the alcohol test, its grade is shown in table 1.
Reference examples 3
Adopting meltblown is the fabric of 0.5OSY (17gsm) by the polypropylene production unit weight that is called PD-3746G of exxon chemical company supply.This meltblown layer contains the Zonyl of Du Pont
FTS fluorocarbon, its content are about 1% weight.Primary air pressure is 4 pounds/in2 gauge pressure, and the primary air temperature is 550 °F.According to above-mentioned test method fabric is refused the alcohol test, its grade is shown in table 1.
Embodiment 1
Adopt meltblown, by the blend of the H-9188 of the polypropylene that is called PD-3746G of 80% weight exxon chemical company supply and 20% weight Findley adhesive company, production unit weight is the fabric of 0.6OSY (20.4gsm).Primary air pressure is 5.1 pounds/inch
2Gauge pressure, primary air temperature are 533 °F.According to above-mentioned test method fabric is refused the alcohol test, its grade is shown in table 2.
Embodiment 2
Adopt meltblown, by the polypropylene that is called PD-3746G of 79% weight exxon chemical company supply, the H-9188 of 20% weight Findley adhesive company and the blend of about 1% weight FX-1801 fluorocarbon, production unit weight is the fabric of 0.6OSY (20.4gsm).Primary air pressure is 4.9 pounds/inch
2Gauge pressure, primary air temperature are 531 °F.According to above-mentioned test method fabric is refused the alcohol test, its grade is shown in table 2.
Embodiment 3
Adopt meltblown, by the polypropylene that is called PD-3746G of 79% weight exxon chemical company supply, H-9188 and about 1% Zonyl of weight Du Pont of 20% weight Findley adhesive company
The blend of FTS fluorocarbon, production unit weight are the fabric of 0.5OSY (17gsm).Primary air pressure is 9.0 pounds/inch
2Gauge pressure, primary air temperature are 436 °F.According to above-mentioned test method fabric is refused the alcohol test, its grade is shown in table 2.
Embodiment 4
Adopt meltblown, by the polypropylene that is called PD-3746G of 69% weight exxon chemical company supply, H-9188 and about 1% Zonyl of weight Du Pont of 30% weight Findley adhesive company
The blend of FTS fluorocarbon, production unit weight are the fabric of 0.5OSY (17gsm).Primary air pressure is 9.0 pounds/inch
2Gauge pressure, primary air temperature are 436 °F.According to above-mentioned test method fabric is refused the alcohol test, its grade is shown in table 2.
Table 1
Refuse alcohol test data reference examples sequence number 12 370% isopropyl alcohol 00 080% isopropyl alcohol 00 090% isopropyl alcohol 000
Table 2
Refuse alcohol test data example sequence number 123 470% isopropyl alcohol 054 580% isopropyl alcohol 0 4.5 1.2 3.490% isopropyl alcohol 030 0.1
Therefore, test shows that fabric has the good alcohol of refusing made in accordance with the present invention.In addition, the fibre diameter of fabric is less, can improve its flexibility.The blocking performance of this new fabric is approximately suitable with the existing layer stampings, so then can produce thin, lighter material, and this also is accompanied by and has reduced the cost of raw material, production cost and disposal costs etc., increases wearer's comfortableness.
Claims (18)
1. supatex fabric that comprises one deck nonwoven web, this nonwoven web comprise from a kind of silk of thermoplastic polymer preparation, wherein said thermoplastic polymer be a kind of isotactic polymer mutually and atactic polymer blend mutually.
2. the supatex fabric of claim 1 also comprises the fluorocarbon of about 0.1～3.0% weight in addition.
3. the supatex fabric of claim 2, wherein said atactic polymer is the mixture of at least two kinds of atactic polymers mutually.
4. the supatex fabric of claim 2, wherein said isotactic polymer is the mixture of at least two kinds of isotactic polymers mutually.
5. the supatex fabric of claim 2, the isotacticity of wherein said isotactic phase is at least 85%, melt flow rate (MFR) is at least 1000.
6. the supatex fabric of claim 2, wherein said blend contains 1～40% weight atactic polymer phase approximately.
7. the supatex fabric of claim 2, it is to adopt a kind of method that is selected from spun-bond process and the meltblown to produce.
8. the fabric of claim 7, wherein said method is a meltblown.
9. the supatex fabric of claim 8, wherein said fabric places between the two-layer nonwoven fabric, a kind of method that employing is selected from the methods such as heat bonding, ultrasonic bonds, hy-droentanglement, acupuncture bonding and adhesive be bonding bonds them together, and forms a kind of laminated product.
10. the supatex fabric of claim 9, wherein said fiber web also comprises a kind of after-applied antistatic treatment step.
11. the supatex fabric of claim 9, he is by the constriction softness.
12. the fabric of claim 9, its form can be curable product, personal-care supplies and outdoor fabrics.
13. the fabric of claim 12, wherein said product is personal-care supplies, and described personal-care supplies are diapers.
14. the fabric of claim 12, wherein said product is personal-care supplies, and described personal-care supplies are women sanitary articles.
15. the fabric of claim 12, wherein said product is a curable product, and described curable product is a surgery apparel.
16. the fabric of claim 12, wherein said product is a curable product, and described curable product is a mask.
17. the fabric of claim 12, wherein said product is personal-care supplies, and described personal-care supplies are wipers.
18. supatex fabric that comprises one deck nonwoven web, this nonwoven web comprises the silk by a kind of thermoplastic polymer preparation, wherein said thermoplastic polymer is at least 85 isotactic polymer, at least a isotacticity that content mostly is 40% weight most by at least a isotacticity and is lower than the blend that fluorocarbon that 20 atactic polymer and content is about 0.1～3.0% weight is formed, and this fabric is to adopt a kind of method that is selected from spun-bond process and the meltblown to produce.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN95195748A CN1161721A (en) | 1994-08-30 | 1995-07-28 | Nonwoven fabric from blends of isotactic and actactic polyolefins |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US08/298,502 | 1994-08-30 | ||
| CN95195748A CN1161721A (en) | 1994-08-30 | 1995-07-28 | Nonwoven fabric from blends of isotactic and actactic polyolefins |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1161721A true CN1161721A (en) | 1997-10-08 |
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ID=5082968
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN95195748A Pending CN1161721A (en) | 1994-08-30 | 1995-07-28 | Nonwoven fabric from blends of isotactic and actactic polyolefins |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1161721A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104963085A (en) * | 2004-12-17 | 2015-10-07 | 埃克森美孚化学专利公司 | Polymer blends and nonwoven articles therefrom |
-
1995
- 1995-07-28 CN CN95195748A patent/CN1161721A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104963085A (en) * | 2004-12-17 | 2015-10-07 | 埃克森美孚化学专利公司 | Polymer blends and nonwoven articles therefrom |
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