CN1501877A

CN1501877A - Coating for a flexible fluid containment vessel and a method of making the same

Info

Publication number: CN1501877A
Application number: CNA028080521A
Authority: CN
Inventors: �ˡ��˶��˹; 埃里克·罗曼斯基; и; 克雷顿·格列高利·托尼; ��G��¿��; 约瑟夫·G·奥康纳; R; 莫里斯·R·帕坎
Original assignee: Albany International Corp
Current assignee: Albany International Corp
Priority date: 2001-04-11
Filing date: 2002-04-05
Publication date: 2004-06-02
Anticipated expiration: 2022-04-05
Also published as: BR0208844A; ATE316490T1; CN1266000C; ES2254719T3; EP1377499A1; CA2442678A1; NO20034568D0; TWI225460B; DE60208911T2; CA2442678C; MXPA03009263A; WO2002083493A1; EP1377499B1; DK1377499T3; DE60208911D1; NZ528654A; NO20034568L; JP2004528218A

Abstract

A flexible fluid containment vessel fabricated out of fabric for transporting and containing a large volume of fluid, particularly fresh water, with the fabric being made from coated thermoplastic yarns or fiber such that its respective sides have coatings so formed thereon that are different from each other or the fabric is coated with voids such that its overall density of the coated fabric is less than 1 g/cm<3> allowing it to float.

Description

The coating and the manufacture method thereof that are used for flexible fluid containment vessel

Invention field

The present invention relates to a kind ofly be used for transportation and hold a large amount of fluids, the especially flexible fluid containment vessel of density ratio sea water density little fluid, particularly fresh water (following be known as sometimes " FFCV "), and a kind of method of making this pig.

Background of invention

It is known for everybody to utilize flexible container to hold with shipping goods especially fluid or fluid cargo.Everybody is known to utilize container transporting fluid in the seawater especially in water.

If goods is the solid of little fluid of density ratio sea water density or liquid stateization, just there is no need to use barge in bulk, oil tanker or the pig of rigidity.On the contrary, can utilize flexible pig, flexible pig is dragged to or moves to the another one place from a place.This flexible pig is compared with rigid container has tangible advantage.In addition, if the flexible container structure is appropriate, after unloading goods, flexible container can be rolled or fold and in returning the way, deposit.

On All Around The World, there are a lot of areas all to be badly in need of fresh water.Fresh water is a kind of like this commodity, and it makes gathering of ice cap and iceberg promptly become a very big trade.But, obtained fresh water anywhere, with economic freshwater be transported to the destination and just become the problem of a concern.

Planning to utilize a capacity such as, present ice cap person of gathering is that 150,000 tons oil tanker comes transport fresh water.Significantly, this not only relates to the expense of using such transportation device, and relates to the additional expenditure that the zero load of the transportation device that loads fresh water is returned.Flexible pig can draw in after goods is unstowed, and leaves on the towboat that for example it is dragged to the place of unloading, so flexible container has reduced the expense of this respect.

Even such advantage is arranged, economics requires the transportation volume of flexible container will be enough to overcome the expense of transportation.Therefore, just developed increasing flexible container.But,, exist about the technical matters of this container although occurred some progress in the past in the several years always.In this, in US Patent 2997973; 2998973; 3001501; 3001501; Improvement to flexible pig or barge in 3056373 and 3167103 is described.The purposes of flexible pig normally is used to transport or store its proportion less than the liquid of seawater or can fluidised solid.

But compare with the density of liquid or fluidization solid, the density meter of seawater reveals a kind of like this fact, that is, when a flexible shipping bags of partly or completely filling is placed to when drawing in the seawater, goods provides buoyancy for flexible shipping bags.This buoyancy of goods has been for container provides a floating force, helps goods from a harbour shipping to the another one harbour.

In US Patent 2997973, disclosed a kind of container, this container comprises one by flexible raw material ratio such as a kind of cross over pipe that has flooded natural rubber or the manufacturing of elastomeric rubber fabric, this cross over pipe has the fleetline front end, be suitable for linking to each other with draw gear, also has one or more pipeline that links to each other with the inside of container, so that container can be filled or unstow.Buoyancy provides by the liquid component in the container, and the shape of container depends on the degree that it is filled.This patent also proposes flexible shipping bags and can utilize the Dan Zujing weft fabric that is woven into tubulose to make.But this patent is not told about the making that how to utilize like this huge pipeline to finish shipping bags.Obviously, a kind of like this structure will solve the problem of seam.On the flexible shipping bags of commerce, can find seam usually, because sack all is to utilize in the piece mode to sew up or other method that the small pieces waterproof material connects together is made usually.Referring to US Patent 3779196 these examples., known working as the time spent of doing that sack is subjected to big load repeatedly,, seam is exactly the root of sack breakage.Can eliminate seam significantly in jointless structure breaks.Yet, be a possibility of simple woven fabric because crack structure is arranged, it has different advantages, especially has superiority at the producer mask.

In this, be published on November 1st, 1994 and carried out general appointment, the U.S. Patent No. 5360656 that name is called " press felt and manufacture method " has disclosed a press felt base fabric of being made by spiral braiding strap, quotes the content that this invention discloses hereby at this.

The length of fabric will be decided by the length of each spiral coil of yarn raw material strap, and outside width will determine by the quantity of spiral coil.

Edge connector for example can (for example be finished by non-knitted material or the sewing, fusing and the welding that contain the non-knitted material of fusible fiber, be called the ultrasonic welding of U.S. Patent No. 5713399 propositions of " super sonic that is used for the adjacent strap of machine clothing is sewed up " in name, this patent is published on February 3rd, 1998 and has carried out general appointment, quotes the content of this Patent publish hereby at this).

Simultaneously, that patent also relates to press felt and makes base fabric, and this technology can be used in the process for the enough firm tubular structure of transfer cask manufacturing.In addition, because the purposes of plan is as a transfer cask rather than as press felt, in press felt, need to realize seamlessly transitting between the strap, so this is not a thing that needs special concern, can use various method of attachment (overlap joint and sewing, bonding, bail etc.).Persons skilled in the art obviously can be understood the method for attachment of other type.

In addition, as previously described, need a kind of seamless flexible container, and seamless flexible container mentioned in the prior art also that the method for making a kind of like this structure had its difficulty.So far, just as what point out previously, big flexible container is generally all made with many patch material, and these little tablet raw materials are sewn to together or bond together.These little tablet raw materials must be fluid-tight.If these little tablet raw materials are not by the impermeable material manufacturing, these little tablet raw materials can easily be coated with a kind of like this water-reducible finish before being used so.Can coat such as spraying or dipping coating method by traditional method.

The another one problem is when container is sky, because container is generally all finer and close than seawater, will not sink when having goods.The device that increases buoyancy can be fixed on the container, to prevent the appearance of this situation.

In addition owing to when having goods, will not sink, also just because of this, container when not having this buoyant device, will form in the centre one arc, this is not wish situation about occurring.

The invention summary

Therefore, main purpose of the present invention is that a kind of large-scale fabric FFCV that is used for transporting the density that specifically comprises fresh water less than the goods of seawater will be provided, and makes the FFCV of manufacturing can not ooze seawater and seawater ion.

Another object of the present invention provides a kind of like this FFCV, and this FFCV has the method that makes the FFCV come-up, does not need buoyant device when especially unloaded.

These and other purpose and advantage all will realize by the present invention.In this, the present invention proposes employment mechanism stringing or spiral tube, to come factory length be that 300' or bigger and diameter are 40' or bigger FFCV.Such large scale structure can be made on the equipment of producing machine clothing.The end of pipe is known as front end and afterbody sometimes, perhaps bow and stern, pipe end can seal by a lot of methods, comprise end is pleating, folding or diameter reduction carry out then bonding, sewing, with bail fix or by mechanical splice fix or the aforementioned patent applications book in the method that proposes connect.

As previously mentioned, thus be coated with for the pig of a seamless making especially that waterproof material makes it not ooze seawater and the seawater ion is inconvenient for big like this pig.In aforesaid second patent application, disclosed the method for finishing this work.The present invention describes in detail this, also makes different coating may be used to FFCV.In addition, the present invention discloses the coating method, described coating process is coated waterproof material not only for the fabric of FFCV and is made it not seep water, and provides buoyancy to pig under the situation of goods (such as fresh water) goods being arranged or do not have.

Of the present invention aspect first in, this invention provides the fabric of making FFCV, the front of this fabric or outside face and the back side or inside face have thermoplastic material, the coating of front and back can be different.The advantage that has different coating at inside face and outside face is owing to a lot of reasons.Such as, just need comprise the UV protection composition in the surface coating outside.The selection of coating may be subjected to the influence of this consideration.Just there is no need to carry out UV protection at inside face.Yet, in inside face coating, just need comprise bactericidal agent or fungicide.The selection of coating also may be subjected to the influence of this consideration.

Advantage for go up different coating to FFCV it is also conceivable that some other factor, and these advantages are conspicuous for persons skilled in the art.

Before weaving, coating is coated onto and is used for making on the fiber or yarn of fabric, just can realize such arrangement layer that is coated with.In this, surface fiber is coated a kind of thermoplastic mixture, and different thermoplastic mixtures is then coated at the back side.The fiber interweaving that selectively all one sides is scribbled a kind of coating and scribble other coating in other one side in the braiding process together.This structure of furnace run under pressure makes the liquefaction of thermoplastic coating, thereby fabric is not seeped water then.Different coating great majority have all been stayed on their original that side fibers that forms.

We transfer to discuss a kind of other method of carrying out fabric coating with more advantages of making now.In this, the invention provides a kind of coating that not only can make fabric not seep water and FFCV is floated on the surface, it is because coating has the character of come-up that coating can make FFCV float on the water.First method is exactly to utilize required coating to come to the fabric sprayed paint.In this, need obtain the result and be exactly making a FFCV who is made of less than the fabric and the coating of sea water density gross density, the density of seawater is approximately 1.0g/cm ³

Therefore, in following method, just can reduce gross density.By in coating, adding microsphere (microsphere can be suitable for the material of this purpose for glass, poly-mer or other), just can in coating, increase hole, although be minimum hole.In coating, add abundant microsphere, make the density of coating be reduced to less than 1.0g/cm ³How much what density descended will be decided by the density of braided fiber and the physical property of needed coating.Such as, if employed fiber just can be floating when coating not, so coating density only need be reduced to coating can be floating till.In this case, composite structure or coated fabric will be floating naturally.

But if employed fiber oneself can not be floating, the density that so just should regulate coating makes the total density of composite structure less than 1.0g/cm with the density that compensation fibre increases ³

Certainly, when reducing density like this, the needed mechanical characteristics of coating should not be reduced to and be lower than the needed standard of effective FFCV.Such as, the tensile strength of coating, amount of deflection and wear resisting property should remain on the level that needs, and this is conspicuous to persons skilled in the art.

Now other method that enough buoyancy is provided to FFCV is discussed briefly, in this, this method relates to again and is used for making the impermeable coating of fabric.Except forming foamed coating in a conventional manner, find very unexpectedly that also the entrapped air that sprays in the coating on the fabric causes forming air filled cavity in coated fabric.This air filled cavity has reduced the density of coating, if density is reduced to enough degree, just can make coated fabric floating.The size of air filled cavity and position all are ccasuals, and air filled cavity can change owing to the variation of spraying condition.The randomness of this hole can be used for to a certain extent they are reduced to minimum to the influence of mechanical characteristics, as previously described.

The accompanying drawing summary

Just can realize its purpose and advantage by the present invention, description of the invention should combine with accompanying drawing and consider, wherein: Fig. 1 is a total transparent view that the cylindrical FFCV of sharp bow or front end is arranged;

Fig. 2 is the sectional view that has adopted the fabric of the technology of the present invention;

Fig. 2 A and 2B have shown the employing shown in Fig. 2 front fabric of fabric of the technology of the present invention and the sewing point of rear fabric.

Fig. 3 is a sectional view that has adopted the technology of the present invention, added the coated fabric of microsphere in its coating;

Fig. 3 A is one and does not use the stress strain diagram with the resin that has used two kinds of different microspheres;

Fig. 4 is a sectional view that has adopted the technology of the present invention and scribbled the coated fabric of the coating of carrying air secretly;

The partial enlarged drawing of the coating of the technology of the present invention that Fig. 4 A is the employing shown in Fig. 4;

Fig. 5 is the transparent view of a device, and this device affacts high temperature and pressure and adopted technology of the present invention and will use on the pipeline on the FFCV; And

Fig. 6 is the transparent view that device shown in Fig. 5 and the pipeline that has adopted the technology of the present invention combine.

Preferred embodiment describes in detail

The FFCV10 that recommends utilizes the waterproof pipeline 12 of seamless knitted to make.The structure of pipeline can change.Such as, it can comprise a pipeline, this pipeline has quite uniform diameter (girth) and seals at each end, as shown in fig. 1.It also can have uneven diameter or uneven shape.Corresponding end will draw in, clamps, also seal with a lot of modes.The coating structure that forms also should be enough softness, can fold or roll so that transport and deposit.The aforementioned patent applications book has been discussed designing requirement, the material of use, the characteristics and the advantage of some structure, is not here just repeating.But, to briefly discuss the material that uses below.

Because FFCV will be subjected to the ringing of unloaded lotus and top load, therefore, when selecting any material, also should consider the restorability of material in the cyclic loading environment.Material also must be able to be resisted the effect of the goods of Exposure to Sunlight, seawater, sea temperature, marine life and shipment.Building material must prevent that also goods is subjected to the pollution of seawater.If seawater has been immersed goods by brute force, perhaps salt ion has diffused into goods, will produce pollution.

The present invention proposes and utilize coated fabric to make very large FFCV.Coated fabric has two kinds of main constituents.These constituents are fiber reinforcement and polymer coating.There are multiple fiber reinforcement and polymer coating all to be suitable for FFCV.Such material must be able to be handled mechanical load and the various types of prolongation that FFCV will run into.These materials, the especially coating of Shi Yonging must be wear-resisting, because these materials can touch object in the process of traction.Equally because propose FFCV is drawn in and is rolled onto on the spool, like this FFCV batch with the process of decontroling in will contact with the surface of tractor tug, so the material of selection should be resisted the wearing and tearing that this contact brings.In addition, the material of use should be in conjunction with wanting handling load to select.Such as, if goods is the water that flows, employed material especially should use with circulating water together at the inboard employed coating of FFCV.If the water that flows is to use in its compass of competency, the coating that uses even will be through the approval of the such government organs of food and FAD (FDA), if not in its compass of competency, just must make the approval of the government organs of land used the country one belongs to through this water.Therefore, the coating of the sort of meeting leaching harmful chemical or meeting dirty cargo just can not be used for the FFCV inboard.If in coating, used for example bactericidal agent, fungicide or ultra-violet stabilizer, just should avoid carrying out leaching.The loss that leaching causes may damage the result that hope obtains.According to the net result of the character of wanting handling load and needs, select coating will consider that other factors is conspicuous for persons skilled in the art.

The polymer coating that is fit to comprises polyvinylchloride, polyurethane, neoprene and natural rubber, polyureas, polyolefin, silicone polymer and acrylic acid series polymeric compounds.These poly-mers can be themoplasticity or thermoset material in fact.Thermosetting polymer coating can harden by heating, can room temperature vulcanizing or UV cured.Polymer coating can comprise can increase its plasticizer and stabilizer flexible or durability.Preferred coatings is plasticized polyvinyl chloride, polyurethane and polyureas.These materials have the favorable protection performance, and good flexible and durability.

The fibre reinforced materials that is fit to is that nylon (as a common species), polyester (as a common species), many aramid are (such as Kavlar , Twaron  or Technora ), polyolefin (as Dyneema  and the Spectra  that constitutes by ultra-high molecular weight polyethylene), and polybenzoxazoles (PBO).

In a material category, use high strength fibre to reduce the weight of needed fabric to satisfy the designing requirement of FFCV.The optimum fiber reinforcement material is a high-strength nylon, many aramid of high strength and high-strength polyolefin.PBO must utilize owing to having intensity values, but because the more expensive relatively less use of price.High-intensity polyolefin must utilize owing to having very high strength rating, but is difficult to carry out effectively bonding with coating.

Therefore, consider aforementioned content, just can be with fiber and fabric together with using coating to select.

Thereby discuss now to such large scale structure is coated with water-reducible finish and make it impermeable a kind of method, have several methods that in aforementioned application, propose just can finish this work, no longer repeat here.

But that discusses in the patent application as described above is such, for the method that pipeline is coated has been utilized the thermoplastic complex method.The compound of at least two kinds of fibrestocks of pipeline utilization weaves.A kind of raw material should be a fortifying fibre, and second kind of low melting point composition that raw material should be low-melting fiber or a kind of fortifying fibre.Low-melting fiber or low melting point composition can be a kind of thermoplastic polyurethane or polyethylene.Fortifying fibre can be polyester or nylon tire cord, or a kind of in other fiber of above discussing.Pipeline will controllably heat and pressure treatment, and high temperature and pressure will make low-melting fiber or low melting point composition melt, to fill the space in the braiding structure.Stop heating and pressurizing and etc. after structure cools down, will form a composite structure, in this composite structure, low-melting fiber or composition have just become the matrix of fortifying fibre.This method need heat and pressurize, also to provide a kind of method that side opposite can not adhered to each other simultaneously or heat bonding together.

The present invention changes at coating thereby a kind of fabric that has different coating in its both sides is provided.In this, this method is exactly to carry out before the knit operation, coating is coated onto be used for weaving on 20 the fiber or yarn.The fiber 22 on surface is coated a kind of thermoplastic mixture, and described back side fiber 24 is coated a kind of different thermoplastic mixture, as shown in Figure 2.The fiber interweaving that weaving optionally scribbles all a kind of coating is on surface 26, with all fiber interweavings that scribble another coating overleaf on 30.Two-layer fiber connects together by a kind of knitting skill that is known as the sewing point.Fig. 2 and Fig. 2 A and Fig. 2 B are combined when observing, and this sewing point technology just can obtain explanation.In this,

fiber

22 and 24 all scribbles thermoplastic coating, and their most length are all respectively on surface 26 and 30.This is owing to used sewing point 32 in fabric.Though shown fabric all is known as 8 usually and combines knitting, be exactly the satin weave two-layer fabric of sewing point, can use any this purpose fabric that is suitable for.

Before being coated with thermoplastic material, core fiber can be made with polyamide, polyester, aramid, polyolefin, artificial silk fabrics, fiber glass or any yarn series that is suitable for fiber coat series.The coating of this core fiber can be finished for persons skilled in the art known method by a kind of.According to the thickness of needed fabric and the requirement of strength that must reach, a variety of operable danier sizes are arranged, its scope from 210 daniers until 10,000 daniers.

Thermoplastic coating can be urethane, polyester, polyamide, polyvinylchloride, polyolefin or similar raw material.The melting temperature of these coating must fully be lower than the melting temperature of core fiber, just can not damage core fiber like this in laying coating or heat treatment process after this.

A coated fiber extremely commonly used is the polyvinylchloride (PVC) that is coated on the polyamide multifilament.This fiber is traditionally as the iron-clad fabric of braided cable.Another common coated fiber is the thermoplastic urethane that is coated on the polyamide multifilament.This fiber is used for making outdoor equipment traditionally.These two kinds of fibers can braiding be so that make a kind of structure on the large-scale loom of making machine clothing, and this structure is a kind of two-layer fabric that utilizes the sewing point that goes in ring to weave.The structure that obtains is the tubulose that does not have seam, but still can permeate water and air.To make it not seep water and air in order being coated with to woven fabric to coat, must to handle, allow coating flow through every fiber with the pressure and temperature of appropriateness.Every kind of coating system all will be on fabric a corresponding effluent mistake, to form an even isolation layer to isolate water and air.After the pipeline braiding finished, the coating above the

fiber

22 and 24 was liquefied under the effect of high temperature and pressure.

Set forth a kind of method of finishing this process in aforementioned second patent application, this method relates to a kind of device 71 that is presented among Fig. 5 and Fig. 6, and this device can affact heat and pressure above the pipeline 12.Device 71 both can drive voluntarily, also can move by outside trailing cable.Each

parts

73 and 74 of device all comprise heating plate or electric hot plate, and heating plate has respective magnets 76 and motor (not shown), and is located at the both sides of fabric respectively, as shown in Figure 6.Also provide a power supply (not shown) to heating plate 76 and motor power supply, this motor is used for driving the device that passes pipeline 12.Magnet is used to two heating plates 76 are moved to together, thereby produces a pressure to fabric when the coating on the yarn is heated liquefaction.These magnet also make heating plate 76 facing to interior heating plate 76.Device 71 comprises the inviscid belt 78 that goes in ring, and the belt 78 that goes in ring is supported on above the cylinder 80 that is positioned at the heating plate end.Belt 78 is supported on above the heating plate 76.In this way, when belt 78 contacts with the surface of fabric, just there is not relative motion between belt 78 and the cloth surface.This has just eliminated the stain of fusing coating and has made coating uniform distribution between yarn.Install traversingly in this speed by pipeline 12 length, described speed should be, and the coating that makes thawing is folded back onto together and takes place at fabric and solidifies before bonding.Faster speed if desired, a kind of inside face that is used for temporarily making fabric is spaced from each other and the device of coating solidification just can be realized.Such as, this device can be a kind of driven member that is located at insides of pipes, the design of this member and described device are similar, but just do not have that part of heating plate or magnet certainly.Other is suitable for this purpose method is conspicuous for persons skilled in the art.

Consider the sealed nature of FFCV, if be used for transport fresh water, as the part of the inboard coating procedure of FFCV, it can provide a kind of coating that comprises bactericidal agent or fungicide, to prevent bacterium or mould or other pollutants.

In addition, because sunshine also has degradation effects to fabric, at this point, FFCV also comprises UV protection composition or stabilizer element, its part as outside coating.

Forwarding another one now to is the embodiment that FFCV coats, and one is utilized the density of the FFCV of the such material manufacturing of for example nylon, polyester and rubber will be bigger than the density of seawater.Such result is exactly that unloaded FFCV or the zero load part among the large-scale FFCV will be sunk.This sinking effect will cause very high stress on FFCV, packing into and unload in the null process and will cause very big difficulty to loading and unloading FFCV at FFCV.Use coating just for mechanical buoyant device provides an alternatives, because coating can provide buoyancy.

As previously mentioned, also can float in the time of the FFCV zero load and leave nothing to be desired, this can finish by a lot of methods, is included in the method for setting forth in the above-mentioned patent application.Here the method that is comprised is to give the FFCV coating with foam.By using foam coating, people just can be reduced to 1.0g/cm with the gross density of coated fabric ³Below, because the density of the yarn that uses or fiber (such as polyester) and coating resin (such as polyvinylchloride) is all greater than 1.0g/cm ³Foamed coating is usually directed to produce a large amount of gas by chemical method in coating, perhaps on purpose pneumatic blending is advanced in the coating by mechanical device.Use foam that its advantage is arranged, and under certain environment, also need to do like this.Use foam that its shortcoming is also arranged because to control infiltration, all even thickness is all very difficult.In addition, the abrasion resistance of foam and mechanical strength are also less than non-foaming cold coating.

Except bubbling, the alternatives of a recommendation is that microsphere is joined in the coating.Two types microsphere is arranged usually---glass and poly-mer.Bulk density when average particle size is approximately 100 microns can be hanged down 0.01g/cm ³This microsphere is made by 3M and Pq Corp..Pq Corp. sells the plastic particles ball Charge of trade mark PM6545 and PM6550.

PM6545 and PM6550 utilize copolymer manufacturing, and copolymer is made up of polyacrylinitrile and polymethacrylonitrile.The baton round product can anti-solvent and resin.Be their performance table below

	Density (g/cc)		Volume particle size (μ)
	Density (g/cc)		Volume particle size (μ)			Product hierarchy	Bulk density	Effectively	On average	Scope	Operation pressure (pound/sq in)
???PM6545	????0.009	????0.020	????110	??10-250	?????2000	Product hierarchy	Bulk density	Effectively	On average	Scope	Operation pressure (pound/sq in)
???PM6545	????0.009	????0.020	????110	??10-250	?????2000	???PM6550	????0.010	????0.022	????100	??10-250	?????2000

Table 1

Pq Corp. also supplies a kind of hollow glass microspheres Q-Cel 6019S.This material is useful, but is exactly a bit fine and close, and density is 0.19g/cm ³

Just as what can see in following example, 14% loadings by volume provides microsphere, and the density of coating reduces to 0.95g/cm ³Should be noted that needed gross density of final finished and the loadings that needs will depend on resin and fabric.Equally, when the physical property of coating reduces, to such an extent as to its performance just can not be hanged down the integraty that has influence on FFCV.

Sample

Resin and curing agent

Adiprene  LF 950 (urethane prepolymer)-1.13g/cm ³, Ethacure  100 (curing agent)-1.022g/cm ³

Stochiometry for 95% will mix with 100 parts of Adiprene mutually with 11 parts of Ethacure 100.Notice that the amount of the microsphere of use has only been considered Adiprene, yet the amount of curing agent should be taken into account also.

In order to float on the water, the density of polyurethane coated must be less than 1.0g/cm ³Density is 0.95g/cm ³Just very effective.The density of attention fabric also should be taken into account.In practice, the density of urethane need be reduced to and can make it and it fabric that is coated with can both float.

Sample ID	????Adiprene ????LF?950	????Ethacure?100	????PM?6550	????Q-Cel ????6019S
Sample ID	????Adiprene ????LF?950	????Ethacure?100	????PM?6550	????Q-Cel ????6019S	????5017-08A	????100g	????11g	????X	????X
????5017-08B	????100g	????11g	????0.38g	????X	????5017-08A	????100g	????11g	????X	????X
????5017-08B	????100g	????11g	????0.38g	????X	????5017-08C	????100g	????11g	????X	????3.13g

Sample ID	Density (calculating)	Microsphere (volume %)
Sample ID	Density (calculating)	Microsphere (volume %)	????5017-08A	????-1.13	????X
????5017-08B	????-0.95	????14.8	????5017-08A	????-1.13	????X
????5017-08B	????-0.95	????14.8	????5017-08C	????-0.95	????14.3

Table 2 formula information

Microsphere is mixed into and does not have much difficulties in the Adiprene prepolymer.Because the density of PM6550 microsphere is low, so use the PM6550 microsphere just difficult more.The sample of every kind of resin compound is cast onto in the mould, allow its solidify and be trimmed to the size of needs, carry out the test of pulling strengrth then.

The intensity of PM6550 that observes and Q-Cel 6019S foundry goods all decreases, as seeing among Fig. 3 A.In this, unfilled resin is represented with line 60, represents with lines 62 with the resin that PM6550 fills, and represents with lines 64 with the resin that Q-Cel 6019S fills.Also should carry out amount of deflection and abrasion detection.

Thus, by adding microsphere, will be reduced to that can produce buoyancy to the density of resin at seawater.Though the performance of resin will be affected, still be enough to satisfy concrete application requirements.It should be noted that polyurethane especially the spraying of polyureas all under high pressure finish usually, promptly above 1000 pounds/inch.Selected microsphere should bear this pressure.

Fig. 3 has shown a coated fabric 40.In this, a basalis 42 is arranged, basalis 42 can utilize a kind of yarn of needs or fiber weave, knitting or the braiding.Both

sides

44 and 46 at fabric 40 all scribble needed resin.Such as the aforementioned, before using resin (by spraying etc.) microsphere 48 is added in the resin.Microsphere 48 is dispersed in the coating randomly, and has formed enough holes, so that the gross density of fabric 40 is less than 1g/cm ³Therefore, a kind ofly utilize this textile FFCV when being equipped with or do not adorn the fresh water goods, can float in the seawater.

A kind of alternative approach that buoyancy is provided for fabric is discussed now, in this, is please refer to Fig. 4 and 4A.In a lot of the application, when having used coating, do not need to be entrained in the air in the coating usually.This and aforesaid foam coating are completely contradicted, and take measures always to prevent that entrapped air from staying in the coating.

The present invention just in time in contrast.In order to reduce the gross density of coated fabric 50, allow entrained air in coating 52.As seeing among Fig. 4 A, the air filled cavity 54 that size and position all occur at random is entrained in the coating 52.The amount of entrained air that needs will decide according to the fiber that uses and the density of resin.But its target is to make the gross density of coated fabric less than 1g/cm ³

Such as a kind of fabric is arranged, utilize polyethylene (UHMWPE) fiber (their trademark is Spectra  or the Dyneema ) braiding of super high molecular weight, coat the polyurethane coating series of two kinds of compositions by injection then, this polyurethane coating series is fibre-bearing not, only contains pure polyurethane coating.

Can float (density 0.97g/cm though expect the WHMWPE fabric ³), expect also that (density is approximately 1.17g/cm being coated with polyurethane ³To 1.27g/cm ³) after, any flotation property of fabric all will be offset by very fine and close coating.The coating that adds was at least 1: 1, and the ratio of more typical coating and fabric is 2: 1 even 3: 1.

When the sample of spraying fabric was put in the water, it was floating unexpectedly.Because coating is coated by spray technology, air is entrained in the coating in the process of spraying, and actv. is reduced to density less than 1.0g/cm ³The density of noting coating changes main variation according to injection conditions.Equally, the density of coated fabric also will change according to the ratiometric of coating and fabric.

Under the situation of having used microsphere, between the floating ability advantage of the mechanical strength of coated fabric and cloth, an equilibrium point is arranged.Obviously, this equilibrium point should not reach the degree that the integraty of a kind of FFCV of making suffers damage.

Equally, in either case, the filling paint that will have entrapped air or a microsphere is located at one, and top the or below of filling paint is not good more only.Filling paint also can be clipped in not between the filling paint, perhaps is clipped between the different coating of arranging along these lines, such as the inside that is coated with pipeline with filling paint, and is coated with the pipeline outside with filling paint not.Its variation pattern is diversified.

In addition, whole pipe is coated filling paint, perhaps a part or the chosen position part of pipeline are coated not filling paint with other parts or position, this is all good more only.All these depend on the result that will obtain.

Though preferred embodiment has been carried out detailed disclosure and description here, their scope is not limited thereto, and on the contrary, their scope should be determined by additional claims.

Claims

But 1. flexible fluid containment vessel that is used to transport and/or hold the goods that comprises a kind of fluid or fluidized material, described pig comprises:

The flexible tubular structure of elongation that constitutes by fabric, described fabric has one first side and one second side;

Described tubular structure, this structure have a front end and a rear end;

Be used to seal the device of described front end and described rear end;

Be used to fill and the device of the described cargo loading and transporting container of unstowing; And

Being coated with water-reducible finish for described tubular structure makes it impermeable method and comprises: utilize the yarn or the fiber that scribble thermoplastic coating to make described fabric, wherein said first side mainly utilizes the yarn or the fiber that scribble a kind of first thermoplastic coating to make, and the described second side utilization scribbles a kind of yarn or fiber of the second thermoplastic coating different with the first thermoplastic coating and makes, and make thermoplastic coating fill space between yarn or the fiber, so that coated fabric is not seeped water.
2. pig as claimed in claim 1 is characterized in that described fabric weaves, and described first and second sides form by the sewing point.
3. pig as claimed in claim 1 rises and is characterised in that described thermoplastic coating will carry out high temperature or pressure treatment, perhaps is subjected to the processing of high temperature and pressure simultaneously, thermoplastic coating is flowed and the filling space.
4. pig as claimed in claim 1, it is characterized in that described first thermoplastic coating and the described second thermoplastic coating are chosen from the class coating that following raw material constitutes: urethane, polyester, polyamide, polyvinylchloride, polyolefin or other are suitable for the raw material of this purpose.
But one kind be used to transport and/or hold comprise a kind of fluid or fluidized material the flexible fluid containment vessel of goods, described pig comprises:

The flexible tubular structure of elongation that constitutes by fabric;

Described tubular structure, this structure have a front end and a rear end;

Be used to seal the device of described front end and described rear end;

Be used to fill and the device of the described cargo loading and transporting container of unstowing;

A kind ofly be used for being coated with water-reducible finish to described structure and make it not seep water and provide the method for buoyancy to comprise: utilize the coating that contains the sufficient amount microsphere to give described fabric coating, the gross density that makes coated fabric is less than 1.0g/cm ³
6. pig as claimed in claim 5, it is characterized in that described coating is chosen from the class coating that following raw material constitutes: polyvinylchloride, polyurethane, synthetic and natural rubber, polyureas, polyolefin, silicone polymer, acrylic polymers or their foam derivant.
7. pig as claimed in claim 5 is characterized in that, described coating is themoplasticity or thermoset material.
But 8. flexible fluid containment vessel that is used to transport and/or hold the goods that comprises a kind of fluid or fluidized material, described pig comprises:

The flexible tubular structure of elongation that constitutes by fabric;

Described tubular structure, this structure have a front end and a rear end;

Be used to seal the device of described front end and described rear end;

Be used to fill and the device of the described cargo loading and transporting container of unstowing;

A kind ofly be used for being coated with water-reducible finish and make it not seep water and provide the method for buoyancy to comprise: utilize the coating that contains gas or contain entrapped air to come to described cloth coating to described structure, gas or the entrapped air stayed in the coating are abundant, and the gross density that makes coated fabric is less than 1.0g/cm ³
9. pig as claimed in claim 8 is characterized in that, coating is coated onto above the fabric by spraying or with the form of foam.
10. pig as claimed in claim 8, it is characterized in that described coating is chosen from the class coating that following raw material constitutes: polyvinylchloride, polyurethane, synthetic and natural rubber, polyureas, polyolefin, silicone polymer, acrylic polymer or their foam derivant.
11. pig as claimed in claim 10 is characterized in that, described coating is a kind of themoplasticity or thermoset material.
12. but a flexible fluid containment vessel that is used to transport and/or hold the goods that comprises a kind of fluid or fluidized material, described pig comprises:

The flexible tubular structure of elongation that is made of the fabric that comprises fiber or yarn, fiber or yarn utilization mainly comprise ultra-high molecular weight polyethylene or polyolefinic material manufacture.

Described tubular structure, this structure have a front end and a rear end;

Be used to seal the device of described front end and described rear end;

Be used to fill and the device of the described cargo loading and transporting container of unstowing;

Thereby a kind of polyurethane raw material that utilizes makes it impermeable method for described fabric coating.
13. pig as claimed in claim 12 is characterized in that, described coating is a kind of thermoplastic polyurethane coating.