CN102469839A - Blood resistant and viral resistant composite fabrics - Google Patents

Abstract

Composite fabrics comprise a nonwoven web, preferably a fully calendared nonwoven web of fusible fibers, and a monolithic breathable polymer layer on at least one surface of the web and have excellent breathability, good abrasion resistance, and offer protection against both blood and viral agents.

Description

Anti-blood and antiviral compound fabric

The cross reference of related application

The applying date rights and interests that No. the 61/217587th, the U.S. Provisional Application that the applying date rights and interests that No. the 61/320709th, the U.S. Provisional Application that the application requires to submit on April 3rd, 2010, this U.S. Provisional Application require to submit on June 2nd, 2009.

Open background

The present invention relates to compound fabric, more specifically, relate to compound fabric, make this fabric be applicable in health care is used and use as protective garment with blood and viral barrier properties.

At medical health field, people recognize, need provide protection with antagonism infective virus or blood born diseases, like AIDS and hepatitis for the health care employee.For this reason, developed the use of textile protection in surgical gown, mask, curtain and other protectiveness dress ornament.Regulation and standard have also further been made contribution for the understanding of this needs, like general safeguard procedures decree of OHSA and the surgical gown criteria for classification by advanced medicine equipment association (AAMI) exploitation that proposes at present.

Be used to assess textile protection the industrial standard of the barrier properties of blood and viral agent infiltration is comprised ASTM F1670 (standard method of test of infiltration resistance that is used for the material of protectiveness clothing with the dextran test) and ASTM F1671 (with the infiltration of Phi-x 174 bacteriophages is test macro, tests the standard method of test of the infiltration resistance of the material that is used for the protectiveness clothing with blood propagation venereal disease substance).

According to AMMI Technical Information Report TIR11:2005; Surgical gown or other protectiveness clothing products are according to ASTM F1670 and ASTM 1671 test programs, if its approval level of quality (AQL) no more than 4%; Then it is classified as 4 grades, and this is high and the most best grade.It is a limit that gratifying method is average that AQL is defined as the level of quality that is used for the sample survey purpose, sees ANSI/AAMI PB70:2003.Food and Drug Administration (FDA) requires an approval level of quality (AQL), and being used for 34 specimen of requirement need have 30 through ASTM F1671 (88.23% percent of pass).In the practice, lower refusal frequency is better.

Stop more than satisfying that the textile protection of standard (ASTM F1670 and ASTM F1671) can buy with reasonable price, but these fabrics are generally the fabric of plastic coat, almost gas permeability can not be provided.The shortage gas permeability makes them bring to wearer and does not accommodate thermal stress significantly.A kind of method that comfort level is attempted to improve by robe manufacturer is only to use coated fabric in the front portion and the arm zone of robe.Yet this method has been sacrificed other regional protection of health.

A kind of common method of gas permeability of industrial measurement barrier fabric is by the definite moist steam transfer rate (MVTR) of ASTM E96 (standard method of test that is used for the water vapor transport of material).Provide moist steam to shift, the gas permeability barrier fabric through ASTM F1670 and ASTM F1671 can obtain simultaneously.These barrier fabrics are based on perfluoroethylene or copolyester film and film.Yet because their expense, they are generally used for reusable protectiveness clothing, do not have practicality for disposable clothing.

A kind of method that is used in the favourable economic benefit of gas permeability composite acquisition is to utilize a kind of like this method; Wherein, The polymer that comprises a kind of mechanical hole building agent is extruded in a single channel on adhesive-bonded fabric, then by constantly with the direction of machine direction crosscut and/or machine direction on extend.The composite that forms is micro porous.It can not see through liquid, but the existence of micropore provides moist steam or air permeability.For example, in this compound, can the formation scope be about 0.1 micron-1 micron micropore.At U.S.5,865,926, U.S.6,258,308 with US 2003/0124324 in this technology has been described.

To such as U.S.5, the layered approach described in 409,761, a shortcoming of such coating process is that this extruding coating method tendency forms aperture or discontinuous in fabric.This aperture can cause material can not pass through ASTM F1670 and ASTM F1671.If aperture is enough little, visible like microcosmic, coat can be tested through ASTM F1670 blood penetration, but still can not be through the more strict virus infiltration test of ASTM F1671.

Open text 2004/0219337 of United States Patent (USP) and the open text 2003/0124324 of United States Patent (USP) apply microporous film layers for addressing this problem on the either side of non woven web.Like what mention in these open texts, basic concept is through adopting low basic weight non woven web and two micro porous coatings, reduced the possibility that forms aperture, and the possibility that aperture is arranged in the composite being also very low.Yet, near user's skin, place the comfort level that rete has reduced the clothing that is made by fabric.In addition, two coatings have increased the manufacturing cost of product, and tend to weaken the drapability of material, operability (hand) and elasticity.

In this area, there are needs, make it satisfy the strict demand of ASTM F1671 virus infiltration test, keep highly-breathable and extra comfort level simultaneously fabric.

Summary of the invention

The invention provides a kind of compound fabric, it can stop test through above-mentioned blood and virus, and has good gas permeability.

In one embodiment, said compound fabric reaches blood and stops test grades 4.

In some embodiments, the MVTR of said compound fabric surpass 1500 grams/square metre/24 hours, or surpass 3000 grams/square metre/24 hours, or surpass 4500 grams/square metre/24 hours, or surpass 6500 grams/square metre/24 hours.

In one embodiment, said compound fabric comprises a kind of non woven web of fusible fibers, and a kind of gas permeability Bulk coat is arranged on its at least one surface.

In one embodiment, this Bulk coat comprises a kind of polyester ether or a kind of high replacement ionomer.

In one embodiment, this non woven web is that total head is prolonged, and no fiber is outstanding in Bulk coat.

These and other characteristic of said embodiment is conspicuous after further reading specification and appended claims.

Brief Description Of Drawings

Fig. 1 is the side view of an embodiment of compound fabric of the present invention.

Fig. 2 is the side view of another embodiment of compound fabric of the present invention.

Detailed Description Of The Invention

With reference to Fig. 1, in one embodiment, compound fabric 10 comprises nonwoven web 12 and overall air permeability coating 14, and this is coated with at least one surface that is placed on non woven web 12.With reference to Fig. 2, it has set forth another embodiment of compound fabric.Compound fabric 100 comprises two non woven web 112,114, places the both sides of overall air permeability coating 116 respectively.

Fleece

Non woven web in the said embodiment can be any standard construction known in the art.Non-woven fibre comprises with the unordered or fiber arranged of repetitive mode not.Non woven web can be classified as continuity or staple net usually.The continuity fleece is the net that in following method, makes, and wherein fiber is produced and is deposited on conveyer belt or the backing plate with general continuous property method.Spun-bond process and meltblown are that the fibroreticulate method of preparation continuity is given an example.Term " spun-bonded fibre " expression is formed at the small diameter fibers of molten thermoplastic in extruding; They are extruded from a plurality of meticulous (often for ring-type) capillary of spinning head with diameter of extruding filament as filament, and then its diameter is stretched or the effect of other known spunbond mechanism and reducing rapidly through for example spraying.Be used to prepare other shape capillaceous of fiber, and the shape of fiber itself, also be known and useful.

Melt and spray the fiber that is meant during being formed at molten thermoplastic extrudes; They are extruded from a plurality of meticulous (often for ring-type) mould capillary as molten thread or silk; Get in the high velocity air (like air); This air-flow has diluted the molten thermoplastic filament to reduce their diameter, makes it can reach microfibre diameter (that is, average diameter is not more than about 100 microns).After this, meltblown fibers is carried and is deposited over by high velocity air on the receiving surface, forms the random dispersion meltblown fiber web.Be used to prepare other shape capillaceous of fiber, and the shape of fiber itself, also be known and useful.

The staple net be with fiber laydown with discrete length on backing plate or conveyer belt and the net of processing.Have staple net comprise carded web for example.Combing is a kind of fibroreticulate method that is used to prepare, wherein fiber and the parallel or random arrangement of direction by the net of carding machine preparation.Carding machine is a kind of equipment with a series of drums or roller, is furnished with line prominent (wire projections) or the metal tooth of defibre and impurity.Fiber in the carded web is mainly arranged along machine direction, but also might random orientation.

In case fiber is through above-mentioned any method preparation and deposition; Independent fiber forms adhesive net through any one or more methods, said method such as heat bonding (calendering), and hydrogenation twines (hyrdoentangling); Resin-bonding, or other method known in the art.

Said fiber can be used multiple thermoplastic polymer preparation, comprises polyolefin, like polyethylene and polypropylene; Polyester, copolyesters, polyvinyl acetate; Polyamide, copolyamide, polystyrene; Polyurethane; Elastomeric material is as can the section of deriving from rising the styrene block copolymer of polymer Co., Ltd (Kraton Polymers LLC), or the ultra-low density polyethylene resin maybe can derive from the olefines block copolymer resin of Dow Chemical (DOW Chemicals), and aforementioned any copolymer such as vinyl chloride/vinylacetate etc.Glass fiber mesh also can be used in the specific implementations.

The thermoplastic fibre that is suitable for can or surpass a kind of polymer (like bicomponent fibre) preparation by single polymers (homofil).For example, " bicomponent fibre " can be represented thermoplastic fibre, and it comprises the nuclear fiber by a kind of polymer manufacture, and this nuclear fiber is covered by in the thermoplastic shell by another different polymer preparation.The shell that this polymer constitutes is through being everlasting and the different temperatures (lower usually) that constitutes the polymer of nuclear fusion down.As a result, these bicomponent fibres provide the heat bonding that is caused by the shell polymeric fusion, have kept the desirable strength characteristics of nuclear polymer simultaneously.

Bicomponent fibre can comprise shell/nuclear fiber; It has following combination of polymers: polyethylene/polypropylene, plastic of poly vinyl acetate (polyethylvinyl acetate)/polypropylene, polyethylene/polyester; Polypropylene/polyester; Copolyesters/polyester, styrene block copolymer elastomer/polypropylene, polyester/low density polyethylene (LDPE) etc.Bicomponent fibre can be concentric or eccentric, and the thickness of expression shell is evenly or inhomogeneous on the bicomponent fibre cross section.Bicomponent fibre is better with one heart, can under lower fiber thickness, more high compression-strength be provided.

For the adhesive-bonded fabric of combing, under the situation of thermoplasticity staple, the length of these fibers changes with the variation of their desired specific fusing points and other character.Usually, the length range of these thermoplastic fibres is about 0.3-7.5 centimetre, preferably about 0.4-3.0 centimetre.The characteristic of these thermoplastic fibres (comprising fusing point) also can be adjusted through changing fibre diameter (caliper).The diameter of these thermoplastic fibres is usually according to denier's (restraining per 9000 meters) or dtex (restraining per 10,000 meters) and define.According to the particular arrangement in the structure, the dtex scope of suitable thermoplastic fibre is for being lower than 1 dtex (like 0.4 dtex) up to about 20 dtexs.

Term " polymer " " comprise homopolymers, copolymer, like block, grafting, random and alternate copolymer, ter-polymers etc., and their mixture and modifier.In addition, only if specifically limit in addition, term " polymer " " comprise all possible geometry configuration of said material, like complete same, same and irregular or atactic symmetries.

Also can carry out standard finishing technology to non woven web.One preferred embodiment in, non woven web is that total head is prolonged.

This online Bulk coat 14,116 needs thin as much as possible, and reason is following.At first, thicker coating is compared thinner coating and is tended to have lower gas permeability.Secondly, thicker coating tends to prepare harder fabric, and its drapability is desirable not as thinner coating.And certainly, thinner coating needs still less material, so preparation cost is lower.In some embodiments, the Bulk coat thickness range is the 10-100 micron, and all thickness are all in this scope.In some embodiments, the Bulk coat thickness range is the 25-75 micron.In other embodiments, coating 10 micron thick of possibly only having an appointment.

For keeping blood and virus resistance, can not there be any fiber that protrudes in Bulk coat on the surface that non woven web will contact with coating, and this point is very important.The fiber of outstanding Bulk coat thickness forms aperture, thus the opening that formation virus compound passage and blood pass through.The non woven web of selecting the continuity fiber to make is favourable, because they tend to have still less or be not terminal from the outstanding free-fiber of net surface.Yet,, cause the possibility that forms aperture even continuity fiber non-woven net also might have the fibrous ring of on net surface, expanding.

Therefore, an importance of this compound be to non woven web select and/or processing guaranteeing not existing fiber ends or fibrous ring to give prominence on the surface of net, and exceed the thickness of Bulk coat.For this reason, preferred non woven web is to prolong being enough to eliminate under the temperature and pressure of any this surface fiber total head.In addition, preferred non woven web comprises the meltability fiber.Term " meltability fiber " expression non woven web comprises the fiber that is made by the material with different melt temperatures.In calendering technology, the fiber with low melting glass more is fusion or softening, fuses in the net in other fiber, and it is inner bonding therefore to have improved net, and guarantees that net surface keeps level and smooth, has no the fiber of the outstanding Bulk coat of possibility.

The fibroreticulate bi-component fibrous reticulum that comprises for example of meltability, wherein high-melting-point polymer (like polyester or polypropylene) is covered by in the shell of low melting point polymer (like polyethylene).Other comprises the non woven web that comprises polypropylene fibre and polyethylene fibre for example; Or by the net of fiber production; The half the of said fiber is a kind of polymer, and second half is another kind of polymer, has different melt temperatures as long as be used for each polymer or blend polymer of half.Bi-component fibrous reticulum provides best result, is preferred therefore.The fleece that is particularly preferred for medical use is processed (low density polyethylene (LDPE) is a shell) by the bicomponent fibre of polyester, because the available gamma ray sterilization of this net.

Bulk coat

This compound fabric has at least one lip-deep Bulk coat 14 and 116 of non woven web.The compound that has blood and/or virus resistance in many prior aries adopts microporous barrier or coating.This film comprises a kind of microparticle material (like calcium carbonate) that is scattered in the polymeric matrix.After film formed, it was extended so that polymer and microparticle material are drawn back, and therefore produces a kind of porous network, this porous network for liquid too little and be difficult to through, but even as big as transmitting steam.On the other hand, integral membrane and coating have the hole that on molecular level, has cross sectional dimensions that is formed in the polymerisation process.The effect of conduit is played in the hole, makes water (or other liquid) molecule be able to spread through film.The concentration gradient that runs through integral membrane causes the vapor transmission through integral membrane or coating.This process is called as the activation diffusion.When water (or other liquid) when film one side is evaporated, water vapor concentration rises.Steam is at the film surface condensation and dissolve.As liquid, hydrone dissolves in the film.Afterwards, hydrone spreads through integral membrane, and has one of low water vapor concentration at film and stress newly to be evaporated in the air.

Integral membrane 14 preferably applies with the vacuum covering technology, like US 5,753, and 342, US 5,762,643, US 5,660,882 instructed with US 6,211,102, its disclosure is incorporated this paper by reference into.In vacuum covering technology, molten polymer is expressed on the base material from die orifice---base material is the non woven web of calendering in this case---, and base material places on the forming screen of perforation simultaneously.Vacuum puts on the base material opposite side, so that coating is pulled on the base material, therefore fiber package is nuzzled in the coating.The vacuum covering technology is preferred, because it makes compound have the toughness and the wearability of improvement.Other suitable but not most preferred technology that is used to apply Bulk coat or film comprises adhesive lamination, ultrasonic bonding, vacuum lamination and extrude coating.

The appropriate resin that is used for Bulk coat comprises the Pebax of A Kema (Arkema) company polyether block amide elastomer; The Hytrel of E.I.Du Pont Company (DuPont)

polyester elastomer and Entira

Breathe, this is a kind of high replacement polyolefin ionomers.Entira Breathe ionomer is preferred especially; Because its cost is low, has better compatibility with most of non woven web.

For strengthening bonding between adhesive-bonded fabric and the Bulk coat, can between Bulk coat and non woven web, add skim ideally and urge stick (like ethylene-methyl acrylate (ethylene methyl acrylate)).This can accomplish through following manner easily: on fleece, sprays the adhesion promotion material or applies Bulk coat 14 and 116, and as adhesion-promoting layer 16 and 120 and the coextrusion of whole resin bed 18 and 118, as illustrated in fig. 1 and 2.Must be noted that to make adhesion-promoting layer thin as much as possible, keep high MVTR to guarantee compound.Because adhesion-promoting layer can have a negative impact to gas permeability, preferably short stick and entire combination thing are with such percentage blend, and this percentage makes material keep good gas permeability, and enhancing simultaneously is bonding with the nonwoven film.Short stick concentration is 15-25 weight %, and preferred 18-22 weight % is proved to be favourable.

Processing

For improving the tactile property of compound, it is favourable increasing progressively the stretching, extension compound.Increasing progressively stretching, extension is a kind of known method, and wherein flaky material is by its anchor clamps that form through a dentation roller that crosses one another are able to stretch.When flaky material when the roller, frictional force makes flaky material " kept a firm hand on ", it contacts with the summit of tooth on the roller there.This point becomes and concentrates on work at selected units or friction point afterwards, and material keeps static relatively there.Therefore, suppose that flaky material takes sinuous path to pass through anchor clamps, make the zone of flaky material between adjacent concentrating on work at selected units stretch.Through making roller more approaching mutually, the degree that crosses one another (i.e. the degree of depth of engagement) increases, and causes bigger footpath, networking, therefore increases span.Concentrating on work at selected units keeps static relatively, therefore can not stretch, or compare adjacent area and stretch very little.Correspondingly, flaky material stretches with incremental manner corresponding to the position (film is kept a firm hand on there) of tooth on the roller.

Size and dimension, space width, the depth of engagement of tooth are relevant on the extension degree that causes of processing and the mill pinion.Yet usually processing causes very high stretching, extension and does not have or the graded area of stretching, extension seldom.For example, certain zone of material possibly be stretched over 100 or 200%, and adjacent area does not more stretch more yet.Stretch technological different with stenter spreader or machine direction; Flaky material can be only than manying 2-6% before stretching at the overall dimensions that increases progressively after stretching; Flaky material still has same performance (gas permeability), is stretched over percent hundreds of like it by tentering frame.

In said embodiment, this compound can or increase progressively stretching, extension on this both direction in machine direction, processing cross-sectional direction.Plurality of devices can make that increasing progressively stretching method carries out more equably on the net in known this area.For example, US 6,368, and 444 (its content is included in this paper as a reference) have been instructed this equipment.This equipment can be used as advantage and is used for embodiment.

Embodiment

Prepare a series of compound fabrics and test MVTR and the blood resistance.With method described in the ASTM E46 MVTR is tested.Confirm the blood resistance with method described in the ASTM F1670.The result lists in the table 1.

Embodiment 1

Make non woven web NSTCPTE-50 from husky Lang Sha rice company (Shalag Shamir) (basic weight 50 grams/square metre), it rolled fully, therefore do not have the fiber tensible to go out the surface of net through the formed anchor clamps of roller of two heating.To be extruded on the surface of non woven web by the coating that microporous layers and whole EMA layer (Exxon (Exxon) TC120) coextrusion form, then this coating net is vacuumized, coating is drawn in the net and covered fiber.At resulting composite floating coat thickness is 23 microns.

Embodiment 2

Repeat the method for embodiment 1, different is that a kind of water-repellent additive (Ampacet A101722) is sneaked in the microporous layers of coextrusion coating.

Embodiment 3

Repeat the method for embodiment 1, different is to replace EMA with a kind of ultra-low density polyethylene resin (Dow EG8200).

Embodiment 4

Repeat the method for embodiment 1, different is to replace EMA with the substituted ionomer of a kind of height (DuPont RENTAS500).

Embodiment 5

Repeat the method for embodiment 1; Different is with NSTCPTE-30 (husky Lang Sha rice (Shalag Shamir); A kind of bicomponent nonwoven net of 30 gram/square metre calenderings) replaces NSTCPTE-50, and replace the microporous layers of polyethylene system among the embodiment 1 with the microporous layers of polypropylene system.

Embodiment 6

Repeat the method for embodiment 1; Different is to replace microporous layers with 100%Entira

Breathe; And with Entira Breathe modification coextrusion superficial layer, to adhere to NSTCPTE-30.

Embodiment 7

Repeat the method for embodiment 1; Different is to be made up of as one deck 100%Entira

Breathe, and the total coating layer thickness that adds the coextrusion coating of EMA adhesion promoter formation among Entira

Breathe is reduced to 10 microns.

Table 1

As shown in table 1, the contrast micro porous coating uses the embodiment (embodiment 6&7) of Bulk coat to have obviously higher MVTR and consistent blood resistance percent of pass, even use with the conventional Bulk coat of same coating layer thickness.It should be noted that especially embodiment 7 only has the coating of 10 micron thickness, but still passed through the test of blood resistance, and have very high MVTR.

Embodiment 8

Feasible non woven web NSTCPTE-30 from husky Lang Sha rice (Shalag Shamir) (basic weight 30 grams/square metre), through by the formed anchor clamps of the roller of two heating, it is rolled fully, therefore there is not the fiber tensible to go out the surface of net.This net tegillum 1 applies with the coextrusion thing that layer 2 constitutes, and then the net of this coating is vacuumized, coating is drawn in the net and covered fiber.Layer 1 comprises Entira

Breathe (70%) and EMA (TC120; 30%) mixture.Layer 2 comprises 100%Entira

Breathe.This coating with 12 the gram/square metre coating speed apply.

10 samples are selected from the net of embodiment 8 randomly, and test its bacterial resistance with the method for ASTM 1671.The result is as shown in table 2.

Table 2

Sample number	The thin plate number	Visual penetration	Test result
				8-1	Do not have	Do not have	Through
8-2	Do not have	Do not have	Through
				8-3	Do not have	Do not have	Through
8-4	Do not have	Do not have	Through
				8-5	Do not have	Do not have	Through
8-6	Do not have	Do not have	Through
				8-7	Do not have	Do not have	Through
8-8	Do not have	Do not have	Through
				8-9	Do not have	Do not have	Through
8-10	Number is too much, can't count	Do not have	Failure

Embodiment 9

Make non woven web NSTCPTE-30 from husky Lang Sha rice (Shalag Shamir) (basic weight 30 grams/square metre), it rolled fully, therefore do not have the fiber tensible to go out the surface of net through by the formed anchor clamps of the roller of two heating.This net tegillum 1 applies with the coextrusion thing that layer 2 constitutes, and then the net of this coating is vacuumized, coating is drawn in the net and covered fiber.Layer 1 comprises Entira

Breathe (70%) and EMA, and (TC 120; 30%) mixture.Layer 2 is made up of 100%Entira

Breathe.This coating with 12 the gram/square metre coating speed apply.

Embodiment 10

Apply the non woven web 7705 that derives from Du Pont (DuPont) (basic weight 26 grams/square metre) with the three-layer co-extruded film that goes out, this moment, non woven web was applied in the vacuum pressure of 203 mm Hg, coating is drawn in the net and covered fiber.The ground floor of film comprises the blend of Entira

Breathe (80%) and EMA (20%).The second layer and the 3rd layer of each Entira

Breathe of free 100% constitute.Coating apply speed be 12 grams/square metre, about 15 weight % that its layer 1 accounts for three layers of coating.Afterwards, with adhesive with 4 grams/square metre weight be the vaporific surface that is sprayed on trilamellar membrane, then another layer non woven web (derive from Du Pont (DuPont) 7705) sticked on the glue-line.Then, the anchor clamps of the compound that obtains thus through forming between the gear that crosses one another by two, and be stretched over 1 millimeter depth of engagement laterally increasing progressively, to improve the sense of touch of this net.

Embodiment 11

Repeat embodiment 10, the compound of different is gained increases progressively and is stretched over 1.65 millimeters the depth of engagement.

Embodiment 12

Repeat embodiment 10, three layers of coating that different is apply speed be 15 grams/square metre.

Embodiment 13

Repeat embodiment 11, three layers of coating that different is apply speed be 15 grams/square metre.

Embodiment 14

Derive from the non woven web 7720 (basic weight 38 gram/square metre) of Du Pont (DuPont) with the thin film coated of two-layer coextrusion, this moment, non woven web was applied in the vacuum pressure of 356 mm Hg, coating is drawn in the net and covered fiber.The ground floor of film comprises the blend of Entira

Breathe (80%) and EMA (20%), and the second layer is made up of 100%Entira

Breathe.Coating apply speed be 14 grams/square metre, its layer 1 accounts for the about 15 weight % of coating.Afterwards, with adhesive with 4 grams/square metre weight be the vaporific surface that is sprayed on film coating, then another layer non woven web (from 7705 of Du Pont (DuPont), basic weight 37.3 grams/square metre) sticked on the glue-line.Then, the anchor clamps that the compound that obtains thus forms through the gear that crosses one another by two, and be stretched over 1.65 millimeters the depth of engagement laterally increasing progressively, to improve the sense of touch of this net.

Claims (20)

1. compound fabric, it comprises and is coated on the online Bulk coat of fiber base material, said compound fabric has the MVTR of at least 1500 grams/square metre/day, and stops that through ASTM F1670 blood test and ASTM F1671 virus stop test.

2. goods that comprise compound fabric as claimed in claim 1.

3. goods as claimed in claim 2, it comprises a kind of clothing, this clothing is selected from surgical gown, surgical drapes, operation pad, cap, boots and face shield.

4. compound fabric, it comprises nonwoven web and a kind of Bulk coat that a kind of total head is prolonged, this is coated with at least one surface that is placed on said net.

5. compound fabric as claimed in claim 4, wherein, this compound fabric have at least 1500 the gram/square metre/day MVTR.

6. compound fabric as claimed in claim 5, wherein, this compound fabric stops test through ASTM F1670 blood.

7. compound fabric as claimed in claim 5, wherein, this compound fabric stops test through ASTM F1671 virus.

8. compound fabric as claimed in claim 5, wherein, this non woven web comprises polyester and poly bicomponent fibre.

9. compound fabric as claimed in claim 5, wherein, said Bulk coat comprises polyolefin ionomers.

10. compound fabric as claimed in claim 5, wherein, this non woven web comprises the meltability fiber.

11. compound fabric as claimed in claim 5, wherein, said Bulk coat comprises the coextrusion thing of whole resin bed and adhesion-promoting layer.

12. compound fabric as claimed in claim 5, wherein, this compound fabric have at least 3000 the gram/square metre/day MVTR.

13. compound fabric as claimed in claim 5, wherein, this compound fabric have at least 4500 the gram/square metre/day MVTR.

14. compound fabric as claimed in claim 5, wherein, this compound fabric have at least 6500 the gram/square metre/day MVTR.

15. compound fabric as claimed in claim 5, it also comprises another layer non woven web, and wherein, said Bulk coat is between two-layer non woven web.

16. compound fabric as claimed in claim 15, it comprises the ground floor non woven web, adheres to the ground floor adhesion-promoting layer on this non woven web, comprises the Bulk coat of the polyolefin ionomers that adheres to the ground floor adhesion-promoting layer; Adhere to the adhesion layer of Bulk coat, and the second layer non woven web that adheres to adhesion layer.

17. compound fabric as claimed in claim 15, wherein, this compound fabric at least one be selected from machine direction with processing cross-sectional direction direction on increase progressively stretching, extension.

18. compound fabric as claimed in claim 5, wherein, this Bulk coat comprises the vacuum covering layer.

19. compound fabric as claimed in claim 5, wherein, this Bulk coat coats at least some fibers in the non woven web.

20. goods that comprise compound fabric as claimed in claim 5.

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