CN1479572A - Barrier preventing wood pest access to wooden structures - Google Patents

Abstract

A multi-layer wood pest barrier having a prolonged lifetime that can be as long as the life of a building or structure to be protected. The lifetime protection is achieved by binding at least one pesticide within a continuous or discontinuous polymer matrix layer thereby substantially reducing release of the pesticide from the matrix. The release rate of the pesticide from the matrix can be controlled by the use of a carrier such as carbon black. The release of the pesticide from the barrier can be further controlled by inclusion of additional layers which can make the barrier substantially non-releasing.

Description

Prevent the barrier of wood pest access to wooden structures

The cross-reference of relevant application

The application requires to be filed in the U.S. Provisional Application sequence number No.60/251 on December 3rd, 2000, and 112 and be filed in the U.S. Provisional Application sequence number No.60/251 on December 4th, 2000,141 live application day.

The application also requires to be filed in the U. S. application sequence number No.09/353 on July 13rd, 1999,494 live application day, this application is the U. S. application sequence number No.09/030 that is filed on February 25th, 1998,690 continuity and on November 16th, 1999 as U.S. Patent No. 5,985,304 publish.

Whole disclosures of aforementioned provisional application and conventional application are incorporated into herein as a reference.

Technical field

The present invention relates to be used to prevent that insect (as termite and borer) from entering zone to be protected and/or structure, as dwelling house, building and wooden structures barrier with these zones of long-term protection and/or structure.More particularly, the present invention relates to prevent that insect from entering zone to be protected and/or structure, especially contain the zone and the long-life protective barrier and the method that contain wooden structure of wooden article.The invention still further relates to the method for manufacturing protective barrier and they are placed the method for described zone and/or structure periphery.

Background technology

The timber that contacts with concrete, as the timber in the wooden building structure, with the timber that contacts with soil such as hedge post, public utilities bar, the horizontal sleeper of railway and wooden supporter one or more wood borers, include, but are not limited to be subjected to the invasion and attack of termite, ant and other moth and destroy structure.Use of insecticide can protect timber to avoid the invasion of these insects.

Be used at present pest control as the business method of eating into wooden insect comprise spraying insecticide, with insecticide stifling (as by with the total sealing and discharge insecticide therein) and with the discontinuous position that separates insecticide is placed the soil ground under and the pesticide treatments soil grown with the residence time at the front-back of building with repellent and/or eliminate destructive insects as termite.These existing business methods have various defectives.

For example, a kind of common method is included in the ground of the pretreated newly-built building of insecticide and handles soil down to prevent termite infestation.Usually, insecticide is sprayed at before building builds up on the soil and reaches in the soil.Link up owing to lack between the user of insecticide and the builder, the soil of handling in architectural process is often lost its continuity.And existing soil insecticide can be lost their biologically active over time, makes the soil of handling resist the invasion and attack of termite to a certain extent no longer validly.

Insecticide may destroy environment with sprinkling and stifling use, the health of animal in the infringement mankind and the family.In addition, a large amount of releases by insecticide in sprinkling and the flusher provide the short rapid release of life-span that prevents that insect from entering.Because the cause of rapid release, insecticide must apply to some months or year repeatedly every several days, to guarantee effectively.

When insecticide placed soil, a large amount of insecticides discharged in the environment usually.Such release to the user of insecticide, be in or to visit the people who used the insecticide place harmful, also harmful to environment simultaneously.

To apply insecticide also undesirable enough to keep long-time effectively amount.Apply a large amount of insecticides and can cause ecological and healthy problem, also can cause the volatilization of offending smell, soil leaching and insecticide.Even apply a large amount of insecticides, it also can dissipate in the short period of time, and need apply again.Another shortcoming that applies a large amount of insecticides be concentration when beginning far above effective required minimum flow, keep the required minimal effective dose of barrier effect but in the short time of comparing with building, be brought down below soon.Therefore, if building does not apply additional chemical substance down or around it, the termite population that exists in the soil will be invaded this building.

A kind of common method that applies additional insecticide is by injecting insecticide in the soil under the concrete foundation, soak soil around the building or both are used in combination, inject insecticide around structure foundation.It is labour-intensive the processing that this back building is handled, and is unsuitable for continuing protection.

Therefore, need to use the method and apparatus that does not have aforementioned disadvantages to come zone and structure such as wooden structures are provided and keep permanent protection.

Summary of the invention

The invention provides a kind of wood borers barrier of multilayer, it has can the same long permanent life-span with the life-span of the building that will protect or structure.Keeping by bonding at least a agricultural chemicals in continuous or discrete polymer matrix layer of life-span reaches thus and reduces the release of agricultural chemicals from the matrix significantly.Can control the speed that agricultural chemicals discharges from matrix by using carrier such as carbon black or channel black.Can further control the release of agricultural chemicals from the barrier by comprising the extra play that barrier is not discharged basically.

In addition, barrier can comprise each layer, for example fabric, screen cloth, sheet and their combination.Extra play can also comprise the identical or different agricultural chemicals of agricultural chemicals in the polymeric matrix layer of one or more and multilayered barrier.Can allow these agricultural chemicals from extra play, discharge, to strengthen the short-term protection.

Barrier and/or extra play are made with a kind of polymer that is selected from thermoplastic polymer, thermosetting polymer, elastomer polymer and copolymer thereof.Agricultural chemicals is added in the polymer, and agricultural chemicals can keep or discharge with a certain speed, and continuous and effective ground is as toxic agent or the repellant of the insect that damages wooden structures for a long time to make them, and the concentration of remaining valid in barrier is simultaneously passed barrier to prevent insect.

Press one aspect of the present invention, a kind of polymer-carrier system is provided, wherein agricultural chemicals being bonded to becomes a kind of bonding friable mixture on the carrier.To make thin polymer sheet or film by the polymeric matrix that this mixture forms.The sheet that will contain the friable mixture that bonds then places near the wooden structures place, to form the barrier that wood borers can't see through.Extra play can be for slowly also discharging volatile insecticide more consistently provides a kind of means, so that produce a barrier zone beyond barrier itself in the soil around the wooden structures.Polymer comprises thermoplastic polymer, thermosetting polymer, elastomer polymer and their copolymer, and insecticide comprises the series pesticide agent that is called pyrethrins.

By another aspect of the present invention, evict portion (extrusion) from and produce a rejection area by be provided with one in place near wooden structures to be protected.The polymer transport system that comprises the carrier that can control insecticide release is contained in this portion of evicting from.This system can keep stable and effective insecticidal agent concentration for a long time in rejection area.

By another aspect of the present invention, provide a kind of pill that contains polymer and insecticide, so that in the rejection area of wooden structures, produce and be kept for ant, termite and other eats into the equilibrium concentration of the insecticide of wooden insect.Place the place of close wooden structures to handle soil this pill, thereby the protection wooden structures is avoided the infringement of termite, ant and other borer.Can adopt the whole bag of tricks pill to be placed the place of close wooden structures.In addition, pill can insert plate in or even be included in the foams.In a preferred embodiment, polymer comprises thermoplastic polymer, thermosetting polymer, elastomer polymer and their copolymer, and insecticide is a pyrethrins.

By another aspect of the present invention, produce rejection area by injecting the hot-melt polymer mixture.The device of sustained release comprises one or more pyrethrinss and polymer, and described polymer is selected from thermoplastic polymer, elastomer polymer and their copolymer.

By another aspect of the present invention, the releasing device that serviceability temperature drives control provides rejection area.

By another aspect of the present invention, use the sustained release device to fumigate structure.Wish to place barrier or produce a zone and prevent any contact between wooden structures and the insect that can damage these structures.Rejection area needs, to protect wooden structures for a long time.

Of the present invention aspect another in, the high density polymer that contains the low volatility insecticide that low rate of release insecticide can be provided with contain low-density (soft) combination of polymers of higher volatile insecticide, thereby a reliable rejection area is provided.

By another aspect of the present invention; the barrier of multilayer prevents that for a long time insect from passing protection zone or structure as creep moth wooden insect and termite, avoid simultaneously to barrier setter, visit or the people and the environment that are in protection zone or structure produces injurious effects.Barrier comprises the inside active layer (being the agricultural chemicals releasing layer) that contains and discharge agricultural chemicals.Barrier comprises that also two-layer agricultural chemicals that allows a small amount of agricultural chemicals discharge barrier keeps layer.Inner active layer is clipped in two-layer agricultural chemicals keeps between the layer, making does not have agricultural chemicals to discharge from barrier basically.The extra play that keeps to comprise between layer and the agricultural chemicals releasing layer one or more layers at agricultural chemicals.

Press one aspect of the present invention, barrier comprises many polymeric layers that are bonded together, to form thin flexible film.This film can place around the zone that need prevent reptile such as termite and the infringement of other insect (as the ground of dwelling house).By another aspect of the present invention, barrier film is being placed the desired position as before, prefabricated elsewhere barrier the holing of dwelling house ground.

By another aspect of the present invention, the barrier of multilayer is the form of thin slice or film, and it comprises that one deck provides the resistance of sheet or film to wear the layer of strength character at least.Also by another aspect of the present invention, the barrier of multilayer comprises the outer protection layer, and they make barrier in installation process and the infringement of avoiding ultraviolet (UV) when expose in the sun subsequently.

Also according to a further aspect of the invention, agricultural chemicals discharges from active layer in a controlled manner, to help to form the barrier of essentially no release.In other words, provide the release of control from active layer, can help only to have a small amount of agricultural chemicals from barrier, to discharge.

The present invention also provides the effective method that uses conventional commercially available device fabrication multilayered barrier.Press one aspect of the present invention, in premix, use dim or channel black is made active layer.The dim prepolymer that can make reaches required flowability, but different with the carbon black of some other types, and dim activity to agricultural chemicals does not have adverse influence.Have been found that dim activity or the decomposition agricultural chemicals of can not reducing.

By another aspect of the present invention, make prepolymer, before adding agricultural chemicals, mix all or most at least carbon black with polymer beads.This method reduces to minimum with carbon black to the adverse effect of pesticide activity.

By another aspect of the present invention, use one or more adhesive layers that each layer in the barrier cemented mutually.An advantage using one deck adhesive layer or multilayer adhesive layer is that active layer can be by the polymer that does not need to be bonded on agricultural chemicals maintenance layer or the extra play.So just allow to use low-melting active layer polymer.Lower operating temperature has reduced the loss of making agricultural chemicals in the active layer process.

Therefore,, an object of the present invention is to provide a kind of barrier or zone of insecticide, with the protection wooden structures in view of foregoing.

Another object of the present invention provides a kind of barrier and contains the rejection area of long-term low volatility barrier and high volatile volatile short-term barrier, to protect contiguous soil.

A further object of the present invention is promptly about 10 to 20 years of the time that keeps barrier long.

A further object of the present invention is promptly about 10 to 20 years of the time that keeps rejection area long.

The present invention will and get the best understanding with reference to following detailed description in conjunction with the accompanying drawings together with subsidiary purpose and advantage.After those skilled in the art have studied this specification and appending claims carefully, others of the present invention and advantage will become apparent.

Description of drawings

Fig. 1 has illustrated first embodiment of the present invention, and it comprises the molten sticking mixture of physics of spunbond polymer sheet and polymer and insecticide, wherein the mixture of polymer and insecticide with spot bond to polymer sheet.

Fig. 2 has illustrated second embodiment of the present invention, and it comprises the molten sticking mixture of physics of spunbond polymer sheet and polymer and insecticide, and wherein the mixture of polymer and insecticide is bonded on the polymer sheet with strip.

Fig. 3 has illustrated first kind of mode using embodiment of the present invention shown in Fig. 1 and 2 and discharge the rejection area of insecticide generation.

Fig. 4 has illustrated and has used the present invention first and second embodiment to produce the second way of rejection area.

Fig. 5 has illustrated the third mode of using embodiment of the present invention shown in Fig. 1 and 2 to produce rejection area.

Fig. 6 has illustrated cylindrical the 3rd embodiment of the present invention of evicting portion's form from.

Fig. 7 has illustrated and has been the 4th embodiment of the present invention that flat rubber belting is evicted portion's form from.

Fig. 8 has illustrated the mode of using embodiment of the present invention shown in Figure 6 to produce rejection area.

Fig. 9 has illustrated the mode of using embodiment of the present invention shown in Figure 7 to produce rejection area.

Figure 10 has illustrated the present invention, and another is the embodiment of pill form, and wherein pill inserts near in the ground of wooden structures.

Figure 11 has illustrated the cross-sectional view that places lip-deep pill.

Figure 12 has illustrated that the use foams are administered to pill on the xoncrete structure.

Figure 13 has illustrated the cross-sectional view of concrete foundation after applying foams.

Figure 14 has illustrated the pill that places on the plate.

Figure 15 has illustrated the plate that contains pill that is applied on the concrete foundation.

Figure 16 has illustrated the hot melt injection.

Figure 17 has illustrated the interval of hot melt injection.

Figure 18 has illustrated the connector (plug fumigating cement blocks) of stifling cement block.

Figure 19 has illustrated the mode that applies of the connector of stifling cement block.

Figure 20 has illustrated laminated apparatus of the present invention.

Figure 21 is the sectional side that shows each layer of a multilayered barrier that makes according to another implementation of the invention.

Figure 22 is the perspective view of the prefabricated barrier that makes of multi-layer polymer film according to the present invention.

Figure 23 is the perspective view of the prefabricated barrier that makes of multi-layer polymer film according to the present invention.

Figure 24 is the sectional side that shows each layer of a multilayered barrier that makes according to another implementation of the invention.

Figure 25 has illustrated the anti-repelling properties to eastern subterranean termite.

Figure 26 has illustrated the anti-repelling properties to coptotermes formosanus.

Embodiment

Have found that and just can reduce or eliminate the insect that can damage this wooden structures significantly when in the soil that remains on these structure peripheries that for a long time barrier combined separately or with the rejection area of insecticide.Rejection area is that a kind of capacity chemical agent that contains is to stop faunistic zone.In the present invention, chemical agent is a kind of agricultural chemicals, and fauna is an insect, especially borer such as termite and ant.By an embodiment of the invention, insecticide is retained in the barrier and/or from the sustained release device that contains the polymeric matrix system and discharges, and described device will be kept 6 years at least, normally 10 years or or even 30 years.

Have been found that by preventing the intrusion of insect between the layer that the agricultural chemicals releasing layer is clipped in two-layer essentially no release for a long time.The release of the layer control agricultural chemicals of essentially no release, making only has a spot of agricultural chemicals therefrom to discharge.These a spot of agricultural chemicals just are enough to the most at least insect of repellent, and barrier has prevented passing of insect.Agricultural chemicals just exhausts slowly very much, the result, and barrier of the present invention can be used to prevent for a long time that insect from entering the zone and/or the structure of protection, the time was 10 years or or even 30 years.Use agricultural chemicals releasing layer layer on every side to allow inner agricultural chemicals releasing layer to discharge agricultural chemicals with the agricultural chemicals rate of release that is higher than barrier with the release that prevents agricultural chemicals basically.So allow to use the material and the processing conditions of the active layer that can not be used for making essentially no release to make active layer (that is agricultural chemicals releasing layer).By with in the agricultural chemicals injection of polymer matrix and use carrier such as carbon black (comprising dim and channel black) also can control release from the agricultural chemicals releasing layer in addition.

Term used herein " controlled release device " be meant a kind of can control and continue that the biologically active chemical substance is discharged into that its surface is gone up and be discharged into device the surrounding medium (as soil) from its surface.Term used herein " biologically active " is meant common with reverse mode stimulating organism body, prevents effect and death up to comprising.Term used herein " agricultural chemicals " is meant and comprises control, repellent, reduces and/or prevent that insect from passing any bioactive chemical substance of barrier." pest " used herein be meant and comprise any harmful plant, animal or microorganism, for example arthropods, spider animal, stinkbug silk worm, insect (eating into wooden insect as ant, termite and other) and fungi.Agricultural chemicals specifically refers to Insecticides (tech) ﹠ Herbicides (tech), biocide (for example bactericide, virucide, fungicide and nematocide) especially, reaches other biocontrol agent or treated substance.Therefore, barrier of the present invention is used for tackling all insects that can't tolerate its deadly performance and/or repellent performance.Term " agricultural chemicals effective dose ", " insecticide effective dose " or " bactericide effective dose " are meant the dosage of the active substance that is enough to bring into play required agricultural chemicals, insecticide or fungicidal activity.

According to another aspect of the present invention, device of the present invention provides a kind of and prevents and treats bioactive chemical substance and be released into method in the surrounding environment.Controlled release device at first discharges insecticide with higher rate, discharges with lower speed stably subsequently.And initial agricultural chemicals can be different with the agricultural chemicals of long-time release.This release gradient has been guaranteed protection zone and/or structure such as wooden object or has contained wooden structure to be protected within a short period of time, and after reaching least effective dose (LED), has only discharged the insecticide of the amount of the insecticide that need be used for substituting degraded.This release gradient has reduced the potential environment and the processing of health problem, has reduced the expense of handling.The rate of release of this device is only decided according to device construction and device composition, and is irrelevant with external factor such as water.

According to another aspect of the present invention, controlled release device is discharged into insecticide in the soil with required speed, thereby produces a zone of containing " minimal effective dose " insecticide that prevents that the insect intrusion is required.Used in this article term " minimal effective dose " is defined as and is preventing that insect from entering the amount of insecticide required in the zone in this zone, and this specified quantitative depends on specific insect and specific insecticide.When placing the structure division of close ground or below ground, in the close soil of this device, produce a rejection area.When between the wooden structures that places non-wooden structure division and the connected part, on the interface between non-wooden structure division and the wooden structures part that connected, produce rejection area.

When commercial use, used insecticide is normally by the insecticide that is used to kill or remove termite, ant and other borer of national management mechanism such as Environmental Protection Agency USA (EPA) or the approval of other suitable management organization.Being preferred for insecticide of the present invention at present is pyrethrins, and it comprises tefluthrin, cyhalothrin, cyfloxylate and decis.Yet what the technology skilful person of this area should understand is that other effective insecticidal agent such as isofenphos, sumicidin, cypermethrin, permethrin and natural pyrethrin also can use.These insecticides can be available from many commercial source, as Dow chemical company, Mobay company, Syngenta CropProtection limited company, Velsicol company and FMC Corp..By the present invention, the combination of insecticide, or the combination of one or more insecticides and other biological active component such as bactericide also is operable.

Following with reference to accompanying drawing, the first controlled release embodiment of the present invention shown in Figure 1 has used the polymer-carrier arrangement that is used for the controlled release insecticide to form rejection area.This embodiment comprises the molten sticking mixture of physics (be illustrated as a little 21) of spunbond polymer sheet 20 and polymer and insecticide in Fig. 1 and 3-5.Spunbond polymer sheet 20 can be to weave or nonwoven textiles, and perhaps it can be a polymer sheet.This textile can obtain from many manufacturers such as Reemay company, Exxon Fibers company and Phillips Fibers company.This textile better is to weave or non-woven polypropylene.

Polymer in molten sticking mixture can comprise any amount of thermoplastic polymer, thermosetting polymer, elastomer polymer or their copolymer.The compatibility and the environmental condition of required rate of release, polymer and insecticide depended in the selection of polymer.Limit the scope of the invention as exemplifying and not wanting, can use following polymer: high density polyethylene (HDPE), low density polyethylene (LDPE), vinyl acetate, urethane polymer, polyester, santoprene, polysiloxanes or neoprene.Yet the better polymerization thing is high density and low density polyethylene (LDPE).In some embodiments, though also can use described other agricultural chemicals herein, chlopyrifos is preferred agricultural chemicals.

The mixture of polymer and insecticide can point-like place on the spunbond polymer sheet.These points should be at interval, so that keep the amount of insecticide to be higher than minimal effective dose in rejection area fully.Minimal effective dose is to be used in the zone to prevent that insect from invading the minimum of required insecticide.The diameter of Fig. 1 and 3-5 mid point 21 better is about 0.5-1.5 centimetre, and it highly better is about 0.5-1.5 centimetre.The size of point and the shape preference that depends on the user, and it is required to make the work that meets the buyer.Point 21 can be aligned, and the interval between point and the consecutive points better is about 1.5-4 centimetre.What the technology skilful person of this area should understand is to look concrete application, also can use the point of other shape.Place the polymer sheet that discharges insecticide near the local of wooden structures or around it, locate, to produce a rejection area by the controlled release insecticide.

Second controlled release embodiment of the present invention also uses and is used for polymer-carrier delivery system that controlled insecticide discharges, and this system comprises the molten sticking mixture of physics of spunbond polymer sheet 20 and polymer and insecticide.The same with first embodiment, polymer sheet 20 can be to weave or non-woven polypropylene, the molten sticking mixture (being illustrated as bar 22 in Fig. 2) of the physics that bonds thereon.Similarly, used polymer and insecticide also can be used in the described embodiment of this part in above-mentioned first embodiment.

By using the extruder system that can form bar (as shown in Figure 2) mixture of polymer in second embodiment and insecticide can be placed on the spunbond polymer sheet.The height of bar 22 can be about 1 centimetre, is about 5-15 centimetre at interval.Bar preferably should be at interval about 10 centimetres.Hope is configured as such structure with bar, promptly can keep the insecticide of Css after the initial release suddenly of insecticide in rejection area.After being applied to bar on the polymer sheet, place on the wooden structures this sheet or the place of close wooden structures, avoid the infringement of insect to protect it.

In all of the embodiments of the present invention, also can comprise bonding filler and/or carrier.Comprise bonding filler and/or carrier and for given rate of release, can discharge relatively large agricultural chemicals, or for the agricultural chemicals of specified rate, can discharge with lower rate of release.Bonding carrier bonding agricultural chemicals.The bonding carrier of agricultural chemicals of being used to bond comprises carbon-based supports, as carbon black (comprising dim and channel black), active carbon and their combination.Can think the similar biologically active chemical substance that can be used for boning of aluminium oxide, alumino-silicate, hydroxyapatite and their combination and carbon.

When using carbon-based supports, the first step is to guarantee the drying of carbon, subsequently liquid insecticide is mixed with carbon.Only use enough carbon blacks (filler) to make friable mixture.Term " frangible " is meant that do basically or not sticking flowable particle.Some agricultural chemicals must heat to become liquid.Liquid pesticide is bonding or be bonded on the very large surface of tiny disperse black carbon, and cooling mixture is so that be blended into it in polymer.Operable polymer is polyethylene (comprising low-density and high density polyethylene (HDPE)), polypropylene, polyethylene and polyacrylic copolymer or blend, polybutene, epoxy polymer, polyamide, acrylate-SAN, aromatics or unsaturated polyester (UP), polyurethane, polysiloxanes or their any other suitable polymers or copolymer in carbon is used.

With the polymer of the carbon-insecticidal compositions (, only being insecticide perhaps) in first and second embodiment, better be that polyurethane mixes then with fusion, powder or liquid condition if do not use carbon.Then this mixture is bonded on the polymer sheet.In first and second embodiment of the present invention, with polymer with insecticide is molten adheres on the polymer sheet.

The another kind of mode that the mixture of polymer and insecticide is bonded on the polymer sheet is by " running through injection moulding (through-injection molding) ".In " running through injection moulding ", fused materials is injected into the mould by the porous net from hot nozzle.Fused materials flows through net under pressure, and solidifies in mould.When the injection moulding fused materials, the porous net is by air dissipation, but it also keeps the material of fusion under pressure, up to its cooling.

It is that molten mixture with polymer and insecticide is placed on the spunbond polymer sheet that the mixture of polymer and insecticide is bonded to a kind of diverse ways on the polymer sheet.If mixture is fusion, then must make its cooling, solidify and solidify.Hereinafter used " molten mixture of polymer and insecticide " be meant polymer be fusion or be in liquid condition.Look its fusing point, insecticide also can be fusion or be included in the slurry soln." polymer is with the molten mixture of insecticide " also can comprise carbon or not melt but other additive of flowing with the melt substance of polymer/insecticide.

First and second embodiment of the present invention should provide the rate of release of the insecticide concentration that is enough to remain valid in rejection area, killing or repel insects, but this speed is again enough slowly, with the concentration of remaining valid for a long time.

Generally speaking, the better composition in the present invention first and second embodiment comprises the carrier polymer of about 70-95 weight portion, the carbon of about 0-15 weight portion, and the insecticide of about 5-30 weight portion.The design philosophy of controlled release device is looked such as user's hobby and the factor the geographical conditions and is become.The polymer transport system can keep 6 years at least in the rate of release that initial insecticide discharges its stable state of back suddenly in these two embodiments, with as the barrier to insect such as ant and termite.Yet, can easily regulate equilibrium concentration in this embodiment to meet each user's specific (special) requirements.

Embodiment shown in Fig. 1-5 can randomly comprise the sheet (not shown) of impermeable insecticide as metallized paper tinsel.Metallized paper tinsel or polymer-extruded are laminated on the face of spunbond polymer sheet, to cause flowing of insecticide.

Another embodiment of the present invention is a kind of barrier that does not allow the sheet that insect passes through, and wherein the bonding friable mixture with biologically active chemical substance or insecticide and carbon carrier is placed in the polymer, and this mixture is gone up not delivery of biologically active chemical substance substantially.Phrase " does not discharge " basically and " only discharging a small amount of " is defined as rate of release less than 0.4 μ g/cm ²/ day, better less than 0.1 μ g/cm ²/ day, preferably less than 0.05 μ g/cm ²/ day.This embodiment comprises the rate of release that is lower than detectable limit value.In this embodiment, prevent insect by " absorption " or " scraping " polymer surfaces and the existence that detects the biologically active chemical substance of harmful insect.The life-span of the barrier that the life-span of this barrier is more higher than rate of release is much longer.And breaking or tearing not too of polymer is easy to " seepage " biologically active chemical substance.Therefore, the two-layer or multilayer in this embodiment suits to the barrier that is kept perfectly.Multilayer can produce in a layer and tear or hole, but insect not can by the second layer or thereafter do not tear layer.Can on one or two surface of barrier, place protective layer further, tear avoiding as fabric.

Finish in case make, the polymer-carrier drug delivery system of first and second embodiment is placed near the structure place that wishes to avoid insect infestations.Fig. 3-the 5th is to the various explanations that apply mode of point-like of the present invention or strip-shaped blade embodiment.The structure of Fig. 1 is shown among Fig. 3-5, but what should understand is that Fig. 2 constructs or other structure also can use well.

In Fig. 3, polymer-carrier delivery system 1 is placed the concrete foundation 23 following and next doors of the wooden structures 100 of generation rejection area 10, avoid the infringement of termite, ant and other borer to protect this structure.

In Fig. 4, with polymer-carrier delivery system 2 place structural detail 24 as the following of porch, courtyard, pavement or place wooden structures 101 next doors the bottom ground below, to form rejection area 10.

In Fig. 5, polymer-carrier delivery system 3 is placed the top and side of the concrete foundation 23 of wooden structures 102, but below the wooden part 25 of this structure, to produce rejection area.

Another embodiment of the invention is shown in Fig. 6 and 7.This embodiment relates to the portion that evicts from that is shown in Fig. 6 and 7 respectively as pushing flexible cylinder 26 and the flexible flat rubber belting 27 of extruding.Can use various polymer, described polymer can rough segmentation become four classes.All kinds of thermoplastic polymer, thermosetting polymer, elastomer polymer and the above-mentioned three groups copolymers of comprising.As an example, operable some polymer that is selected from four classes is: high density polyethylene (HDPE), low density polyethylene (LDPE), ethylene vinyl acetate (EVA), vinyl acetate, polyurethane, polyester, santoprene, polysiloxanes, neoprene and polyisoprene.In some embodiments, preferred insecticide is a chlopyrifos, although above-mentioned other insecticide also can use.Also can add filler.

Preferably, cylindrical diameter is about the 5-15 millimeter, but agricultural chemicals preferably is about 10 millimeters with best steady state release its diameter to the rejection area.The thickness of flat rubber belting better is about the 1-6 millimeter, and width better is about the 5-15 millimeter.Yet, it should be noted and cylinder and flat rubber belting can be designed to satisfy the various conditions that the user runs into.

Generally speaking, in order to keep the equilibrium concentration of insecticide for a long time in rejection area, the composition in this embodiment of the present invention should comprise the polymer of about 70-95 weight portion, the agricultural chemicals of the carbon of about 0-30 weight portion and about 5-30 weight portion.Yet the composition that can change the portion of evicting from is to satisfy user's specific (special) requirements.Estimation can keep rejection area 6 years concerning flat rubber belting concerning cylinder equally at least.

The portion of evicting from can be placed on the different positions to form rejection area.Fig. 8 has illustrated the mode of evicting portion from shown in Figure 6 of using.With one or more flexible cylinders 26 place the concrete foundation 23 of this building ' and wooden part 25 ' between.Flexible cylinder 26 discharges insecticide with controllable rate, to produce rejection area.An advantage of this structure be flexible cylinder 26 can be placed on the building that built up below.Similarly, can be with flexible cylinder with not shown be placed vertically in soil opposite with horizontal direction.The technology skilful person of this area will be appreciated that, looks concrete the factor that use is considered, the portion of evicting from can have other suitable shape and place on any suitable position.

Fig. 9 has illustrated the method for using flexible flat rubber belting shown in Figure 7 to evict portion from.By between the concrete foundation 23 " and wooden part 25 " that one or more flexible flat rubber beltings 27 is placed building or by being placed on, just can produce rejection area.In the unshowned in the accompanying drawings embodiment, flexible flat rubber belting 27 also can be placed vertically the next door at wall.Moreover any suitable placement location of consideration flat rubber belting all within the scope of the invention.

Usually also can reach the controlled release of insecticide by the pill that uses the embodiment shown in Figure 10-13.Pill 13 comprises polymer, insecticide and better also comprises filler.Can use various polymer in this embodiment.They can comprise four base polymers of being made up of thermoplastic polymer, thermosetting polymer, elastomer polymer and its copolymer.From this four class, come selective polymer to depend on design philosophy, and the better polymerization thing is high density polyethylene (HDPE) or low density polyethylene (LDPE).In addition, insecticide should comprise tefluthrin, but also can use following insecticide: isofenphos, sumicidin, cypermethrin, permethrin and other pyrethrins.In order to reach optimum, also carrier such as carbon can be added in the mixture.

Pill 31 discharges insecticide with controllable rate for a long time, to set up rejection area.The composition of the pill that the rejection area in this maintenance soil is required is the polymer of about 70-95 weight portion, the insecticide of the carbon black of about 0-30 weight portion and about 5-30 weight portion.The composition of pill finally depends on user's preference.

Look required application, pill can be any suitable size, and for example its diameter (if or rectangle, its width and thickness) is the 1-25 millimeter, and its length is 2-20 centimetre or longer.And, in order to adapt to special user's demand, can easily regulate the size of pill and the concentration of insecticide.Yet rejection area can keep 6 years at least.

In addition, pill 31 also has the advantage that can easily they be placed Anywhere.The pill of this embodiment of the invention is shown among Figure 10.Pill 31 is inserted in the place near wooden structures 25.Pill shown in Figure 10 can be placed on cement ground 23 below, perhaps they can directly be placed on following (not shown) of wooden structures, so that produce this structure can be damaged in a zone 10 with repulsion insect around wooden structures 25 .Figure 11 has illustrated the cross-sectional view that is embedded in the pill 31 on the surface 40.

Pill is easy to be applied in the purposes than the extensive farming class.Figure 12 has illustrated pill has been sprayed 50 to concrete structural surface 40.Figure 15 has illustrated pill 33 has been placed on treatment surface on the prefabricated board 300.

As shown in figure 13, with foams 41 pill 32 is applied to surface 40 as on soil or the concrete.At first pill is added in the foams by manner known in the art.The foams 41 that will contain tiny pill then spray on 50 to 41 surfaces with power spraye 70 as shown in figure 12, so that be formed for the protective layer on surface.Then pill 32 discharges insecticide, produces a protective barrier in soil, avoids the invasion and attack of insect with protection timber.In order to reach optimum, foams 50 are made up of polyurethane.Also can use polysiloxanes, polyester or polyvinyl acetate.The desired concn of insecticide in the big or small visual foam thickness of pill 32 and the rejection area and becoming.The thickness that is applied to lip-deep foams can become by user's preference.Rejection area can keep 6 years at least.Except as the carrier of insecticide, the also available treated cement of foams and as insulator.

As shown in figure 14, also can use contain embed pill 33 prefabricated board as an embodiment of the invention.This plate 300 can be made by the suitable fixedly material of any kind of pill 33.This plate is that the foamed polystyrene of registration mark is formed by Dow chemical company better.Can any variety of way apply plate, and it also can be used as seal and operates.A kind ofly apply mode as shown in figure 15, the plate 300 that wherein will contain pill 33 places on the concrete surface 42.The pill that embeds separates regularly, and it is determined by the consumption of required insecticide at interval.

In another embodiment shown in Figure 16 and 17, can separate by hot melt and apply the controlled release device that comprises polymeric matrix and insecticide.Design the needs that this embodiment satisfies the structure that has been in place.As mentioned above, polymeric matrix can comprise any in above-mentioned four base polymers.Similarly, can use any in the above-mentioned insecticide.Yet, should use or contain the high density or the low density polyethylene (LDPE) of pyrethrins.Although satisfy user's demand, in order to reach optimum, the concentration of various materials should be in hot melt applies, the about 70-95 of polymer, the about 5-30 of insecticide, and the about 0-30 of filler/carrier.

Figure 16 shows the soil that hot melt 50 is injected near concrete foundation 43 with syringe 400.Xoncrete structure 43 supporting wooden structures 250.Figure 17 has illustrated the interval between the hot melt 50 that injects the soil.

In another embodiment, Figure 18 and 19 has illustrated that use of insecticide fumigates structure 500.By controlled release device being injected or be placed on structure that can be fumigated or near its place, the insecticide that discharges can evaporate, stifling thus this structure from controlled release device.Figure 18 has illustrated and has used the connector 34 stifling structures of being made by building block 502 500.Similarly, Figure 19 has illustrated the method that applies controlled release device with drilling machine 800 drilling bore hole 700 on cement plate 900.In case insert, connector can be fumigated structure.

Figure 20 shows another embodiment of apparatus of the present invention.To contain the low-vapor pressure insecticide in or first polymer 200 of high density polymer with contain than high volatile volatile, promptly low-density second polymer 202 of the insecticide of higher vapor pressure is combined.The degree of cross linking in the reference polymer, high, in and low-density be the well-known term of technical field of polymer.High vapour pressure is defined as vapour pressure and surpasses about 1 milli Pascal, better about 10-100 milli Pascal.Low-vapor pressure is defined as less than 1 milli Pascal, better about 0.05-0.5 milli Pascal.The thickness of first polymer 200 better is about the 1/32-1/8 inch.The insecticide of low-vapor pressure better is permethrin or cyhalothrin.The appropriate materials of first polymer 200 is selected from polyurethane, high density polyethylene (HDPE) and polypropylene.Second polymer 202 is placed on place near first polymer 200, preferably is connected on first polymer 200.First polymer 200 better is waterproof and not saturating radon gas.Therefore, first polymer 200 better is a sheet, and this sheet can be a film or spunbond.By the present invention, first polymer 200 can be two branches, and branch 204 contains among low-vapor pressure insecticide permeable or high density polymer, and another branch 206 is the impermeable layers that do not contain insecticide.Impermeable layer has preventing or reduces the advantage of the disposal that setter and biologically active chemical substance run into/contact.Impermeable layer for example can be polyester film, polyvinylidene chloride fiber or Saranax.

Second polymer 202 is a kind of low-density polymerics, better is polyethylene-vinyl acetate copolymer, low density polyethylene (LDPE) or their blend.Placing the insecticide than high volatile volatile or higher vapor pressure of second polymer better is synthetic pyrethroid, as tefluthrin.

Second polymer 202 can be the form of aforementioned pill, first and second polymer are positioned to first polymer below the ground substrate plate, and second polymer scatters in the soil near ground.Second polymer 202 is more preferably weaving or the form of non-woven perforate grid as shown in the figure.Grid hole can be to feel the size that is not closed to about 1-4 inch grid, and rib 208 has the cross section that width is about 1 mil to 1/8 inch.The fabric of being made by polyethylene, polypropylene or polyester can be used as grid.For 200 in first polymer and second polymer, 202 perforate grids, the device that is combined by first kind and second polymer 200,202 better is to place below ground.First polymer sheet 200 places the place near second polymer, 202 perforate grids, and 200 in first polymer contacts with ground 43 or close ground 43 and between ground and second polymer, 202 perforate grids.Grid material can the organism-absorbing active chemistry and as the reservoir of biologically active chemical substance.

In operating process, first polymer 200 continues as the physical/chemical barrier that prevents that insect from invading.Yet, because the slow release of first polymer 200 only discharges considerably less insecticide in about year and is used to produce rejection area after installation.In addition, because such as the running through and in building course, puncture or tear of electric wire and pipeline, so also flawless barrier can not be set.Therefore, second polymer 202 is set,, thereby prevents that insect from entering the defectiveness part by first polymer 200 so that after arrangement, produce rejection area in several days.Therefore, first polymer 200 has following three kinds of functions: insect barrier, steam/moisture barrier and radon gas barrier.First polymer 200 is designed to and can continues at least 10 years, better met and exceeded 20 years.Second polymer 202 is designed to and can continues at least 5 years, better reach about 10 years.Second polymer 202 exhaust and the anti-insect in no longer valid ground in, first polymer 200 reaches the concentration of the release insecticide that is enough to keep rejection area. Preferred multilayered barrier

Another embodiment of the invention is a kind of multilayered barrier, and it comprises three layers at least: one deck agricultural chemicals releasing layer and two-layer agricultural chemicals keep layer.Agricultural chemicals keeps layer to be positioned at the both sides of agricultural chemicals releasing layer.Agricultural chemicals keeps layer (i.e. " activity " layer or contain the layer of pesticide activity component) to contain at least a agricultural chemicals.The agricultural chemicals releasing layer discharges at least a agricultural chemicals.Agricultural chemicals keeps layer only to allow a spot of agricultural chemicals discharge barrier.Inner active layer is clipped in two-layer agricultural chemicals and keeps between the layer, and making does not have agricultural chemicals to discharge from barrier basically.The thickness of barrier is about 0.010 inch (10 mil) to about 0.030 inch (30 mil) usually, preferably is about 0.014 inch (14 mil) to about 0.016 inch (16 mil).Multilayered barrier can be configured as sheet or film, and place need protection with avoid reptile such as termite and other insect the infringement the zone, as the peripheral region of dwelling house ground.

This multilayered barrier enters shielded zone and/or structure by preventing insect as creep moth and termite, and by repellent and/or prevent that insect from coming protection zone and/or structure by barrier.This multilayered barrier is protection zone and/or structure for a long time, avoid simultaneously to barrier setter, visit or be in the people of protected field and/or structure and environment produces injurious effects.The release minimum of agricultural chemicals from barrier makes this barrier and can not produce disadvantageous consequence by the setter processing.The minimum of agricultural chemicals discharges and makes its minimum that influences to environment, and makes barrier keep for a long time, reaches 10 years usually or or even 30 years.Before construction, this multilayered barrier can be installed in below the ground of building, with owner that the new building property right is provided with to the permanent protection of insect as creep moth and termite.Except preventing that insect from entering shielded zone and/or the structure, this multilayered barrier helps also to prevent that moisture and pernicious gas such as radon gas from infiltrating shielded zone and/or structure.

The barrier of this embodiment of the present invention can comprise the layer that one or more layers is additional.Additional layer can place with agricultural chemicals releasing layer and agricultural chemicals and keep the relevant any desired position of layer, but has one deck extra play preferably to place agricultural chemicals releasing layer and agricultural chemicals to keep between the layer.

The barrier of this embodiment of the present invention can comprise that the resistance that improves barrier wears the extra play of strength character.This extra play can place any desired position relevant with required layer, but has one deck extra play preferably to place agricultural chemicals releasing layer and agricultural chemicals to keep between the layer.Multilayered barrier can be thin sheet or film, and it comprises that one deck provides sheet or film to resist the layer of wearing intensive properties at least.The thickness that the intensity layer is worn in this resistance is about 0.002 inch (2 mil) to about 0.006 inch (6 mil), preferably about 0.004 inch (4 mil) usually.

The barrier of this embodiment of the present invention also can comprise one or more layers additional protection layer, avoids environmental factor such as ultraviolet infringement with the protection barrier.The additional protection layer protects it to avoid ultraviolet infringement when barrier being installed and barrier exposes in the sun afterwards.The additional protection layer can place the optional position relevant with other layer, but is usually located at the outside of other layer of barrier.Protective layer can be made by the salable polymer of heat, to simplify the heat seal to barrier.The thickness of protective layer is generally about 0.0005 inch (0.5 mil) to about 0.003 inch (3 mil), preferably about 0.001 inch (1 mil).Protective layer is generally about 15-30% of barrier weight, preferably about 22%.The areal concentration of protective layer be generally about 13-78 gram material/square metre, preferably about 26 gram materials/square metre.

Each of barrier layer keeps together or bonds mutually to form single multi-layered product.Each layer directly or by the use tack coat bonds mutually.For example, can use tack coat that the intensity layer is worn in resistance is bonded on active layer (being the agricultural chemicals releasing layer) and the agricultural chemicals maintenance layer.Similarly, can use tack coat that the intensity layer is worn in resistance is bonded on the agricultural chemicals releasing layer.An advantage using one or more layers tack coat that each layer of barrier interfixed is that active layer can be by not needing and can keeping the polymer of layer or extra play bonding to make with agricultural chemicals.So just allow in having low-melting active layer (being the agricultural chemicals releasing layer), to use polymer.Lower treatment temperature has reduced the loss of making agricultural chemicals in the active layer process.

Agricultural chemicals keeps layer preferably to be made by the polymeric material that only allows a small amount of agricultural chemicals pass through, and making does not have agricultural chemicals to discharge from barrier basically.Preferred polymer is the Saranex available from the Dow chemical company of Michigan state Midland ^Each layer agricultural chemicals keeps the thickness of layer to be about 0.001 inch (1 mil) to about 0.005 inch (5 mil), preferably about 0.002 inch (2 mil) usually.Agricultural chemicals keeps a layer about 20-40% who is generally barrier weight, is preferably about 25-35%, better is about 30%.Agricultural chemicals keep the areal concentration of layer be generally about 26-130 gram material/square metre, preferably about 60 restrain materials/square metre.In this embodiment of the present invention, agricultural chemicals keeps the release of layer control agricultural chemicals from barrier, rather than the agricultural chemicals releasing layer.But by the release of control agricultural chemicals from the agricultural chemicals releasing layer, the agricultural chemicals releasing layer helps to guarantee only to have a small amount of agricultural chemicals to discharge.In some cases, the rate of release of agricultural chemicals from barrier can be lower than the detection lower limit.

The agricultural chemicals releasing layer can be made by polymeric matrix and the agricultural chemicals that is dispersed in the polymeric matrix.Polymeric matrix can be the controlled release polymeric matrix that can form film.In an embodiment of the invention, polymeric matrix is made by low density polyethylene (LDPE).Now, preferred linear low density polyethylene (LLDPE) is as polymeric matrix material, because its fusing point is lower than other polyethylene.Low density polyethylene (LDPE) can be the low density polyethylene (LDPE) of metallocene catalysis.Other polymer that is applicable to polymeric matrix material includes, but are not limited to urethane, polyurethane, epoxy resin, polysiloxanes, polyethylene+wax (PE+ wax), aromatic polyester, pellethane, polyethylene-vinyl acetate copolymer (EVA), polyethylene, high density polyethylene (HDPE), low density polyethylene (LDPE), vinyl acetate, polyester, santoprene, neoprene, polyisoprene, polypropylene, polyethylene and polyacrylic copolymer or blend, polybutene, epoxy polymer, polyamide, acrylate-styrene-acrylonitrile, unsaturated polyester (UP), polysiloxanes, and their combination.The polymer that this polymeric matrix uses can be hydrophobic.

The example that is applicable to the agricultural chemicals of agricultural chemicals releasing layer includes, but are not limited to pyrethroid, newly intends the combination of nicotine, isofenphos, sumicidin, pyrethrins and this compounds.The agricultural chemicals that preferably is used for the agricultural chemicals releasing layer comprises: tefluthrin, permethrin, cyhalothrin, Chryson, decis, cypermethrin, cyphenothrin, cyfloxylate, decis, chlopyrifos, ABG-6215, basudin, antiphen, methyl-isorhodanate, pentachlorophenol, tralomethrin, chlorfenapyr, fluorine worm nitrile, newly intend nicotine and these combination of compounds.The example of suitable new plan nicotine includes, but are not limited to thiophene worm piperazine, Nitenpyram, Imidacloprid, thiophene worm amine, pyridine worm miaow and thiophene worm quinoline.A kind of agricultural chemicals that preferably is used for the agricultural chemicals releasing layer is a cyhalothrin.Cyhalothrin is the termiticide of high potential, has to kill 99% test termite (LC ₉₉) lethal concentration-0.0001 μ g/ termite, be used for most important U.S. termite kind-eastern subterranean termite (Reticulitermes flavipes).In some embodiments, at least a agricultural chemicals in the agricultural chemicals releasing layer exists with at least 5% amount of agricultural chemicals releasing layer weight.In other embodiments, at least a agricultural chemicals in the agricultural chemicals releasing layer exists with at least 10% amount of agricultural chemicals releasing layer weight.

Multilayered barrier provides the termite-proof effect of some mode.Multilayered barrier provides by using agricultural chemicals such as cyhalothrin with the agricultural chemicals of carrying lethal dose (can be transported to subsequently on the termite that contact with barrier moment) in barrier, provides deadly agricultural chemicals to protect.Multilayered barrier also provides the repellent protection to termite.Multilayered barrier also provides the physical protection of opposing termite, keeps layer because barrier should have level and smooth and coarse outside agricultural chemicals, bites barrier so that termite can not begin to gnaw.

By polymeric matrix be dispersed in the agricultural chemicals releasing layer that the agricultural chemicals in the matrix makes and also can comprise carrier such as carbon black (comprising dim and channel black).Having found that the carbon black that is dim form provides does not deactivate or decomposes agricultural chemicals, is easy to extrude and be easy to prevent the advantage of assembling.But use is the friable mixture that the carbon black of dim form helps to produce flow particles dry basically or that do not glue, and helps the evaporation of agricultural chemicals in the extrusion.The thickness of agricultural chemicals releasing layer is generally about 0.001 inch (1 mil) to about 0.020 inch (20 mil), is preferably about 0.001 inch (1 mil) to about 0.005 inch (5 mil), preferably about 0.002 inch (2 mil) or 0.0037 inch (3.7 mil).The agricultural chemicals releasing layer be generally barrier weight about 15-30%, be more preferably about 22-25%, preferably about 24%.The areal concentration of agricultural chemicals releasing layer be generally about 22-115 gram material/square metre, preferably about 45 gram materials/square metre.

The agricultural chemicals releasing layer should discharge agricultural chemicals in a controlled manner.This controlled release helps agricultural chemicals to keep layer only to discharge a spot of agricultural chemicals from barrier, with the auxiliary barrier that forms essentially no release.In other words, only discharging a spot of agricultural chemicals from barrier can help reach by the release of control from active layer (being the agricultural chemicals releasing layer).

Is to comprise one or more bactericide in barrier except driving away and preventing ideally the agricultural chemicals of insect infiltrate.Bactericide can be included in the agricultural chemicals releasing layer that contains agricultural chemicals or in the bactericide releasing layer that separates.The bactericide releasing layer that separates can be positioned at the inside that agricultural chemicals keeps layer.Can comprise that one or more bactericide are damaged by fungi to prevent complete barrier.

Term used herein " bactericide " can cover the compound with anti-phytopathogen activity, and it can belong to classes of compounds very widely.The example of suitable Fungicidal active compound kind comprises room temperature (25 ℃) solid and room temperature liquid bactericide, these bactericide include, but are not limited to the derivative, strobilurins, carbamate (comprising sulfo-and dithiocarbamate), benzimidazole (as thiabendazole), N-trihalomethyl thio-compounds (as captan) of triazole, benzene, carboxylic acid amide, benzamide, benzene pyrroles and their compound that replaces.Suitable bactericide also comprises: trichloronitromethane, methyl-isorhodanate and 1, the mixture of 3-dichloropropane, N-methyl dithiocarbonic acids sodium, 2,3,5,6-tetrachloro-1,9-benzoquinones, nitrolim, biphenyl, copper naphthenate, antiphen, fentin hydroxide and these combination of compounds.

Fungicidal active compound is used in the active layer of multilayered barrier with the sterilization effective dose.The mixture of one or more aforementioned Fungicidal active compounds also can be used as the active component in the invention process.

When the barrier of this embodiment of the present invention comprised that the intensity layer is worn in one or more layers resistance, resistance was worn the intensity layer and is preferably made by fabric.Resistance is worn the intensity layer and is helped to prevent crack and perforation, and helps to provide barrier with tensile strength.Preferred fabric is made by nonwoven polymer.Particularly preferably be the nonwoven polymer of making by high density polyethylene (HDPE).The thickness of fabric is generally about 0.002 inch (2 mil) to about 0.006 inch (6 mil), preferably about 0.004 inch (4 mil).Fiber fabric layer is generally about 11-24% of barrier weight, about 17-18% preferably.The areal concentration of fiber fabric layer be generally about 30-95 gram material/square metre, preferably about 62 gram materials/square metre.

In order to reduce agricultural chemicals from the release the agricultural chemicals releasing layer at barrier edge, the agricultural chemicals releasing layer can be made into wideer, longer than corresponding agricultural chemicals releasing layer, and agricultural chemicals keeps layer directly or by tack coat to bond mutually preferably.

If barrier is passed by insect, then that one or more layers is additional layer (that is the layer except that the agricultural chemicals releasing layer) places agricultural chemicals to keep can providing a kind of advantage within the layer.Along with agricultural chemicals discharges, extra play is flooded by agricultural chemicals.Therefore, extra play provides additional physics and the desinsection protection to the insect that passes through barrier.

An advantage of the multilayered barrier of this embodiment of the present invention is, this barrier can prevent termite, eat into wooden insect and other insect enters wooden structure in whole or in part.Another advantage of this barrier is to prevent for a long time that insect from passing, and is 10 years even 30 years.Another advantage is that its outer surface does not have agricultural chemicals basically when this barrier is installed.The processor of barrier and the safety of setter have so just been increased.Another advantage of this embodiment of the present invention is that the manufacture method of this barrier is effectively, and this barrier can use conventional commercially available equipment to produce in large quantities.Except preventing that insect from entering shielded zone and/or the structure, the barrier of this embodiment of the present invention has prevented that also moisture and pernicious gas from infiltrating in shielded zone and/or the structure.

According to an aspect of the present invention, this barrier comprises many polymeric layers that bond together, to form thin flexible film.This film can place need protection with avoid reptile such as termite and other insect the infringement the zone such as the peripheral region of dwelling house ground.

At present, the preferred multilayered barrier of the present invention is made up of eight thin strata compound films.Each layer bonds together to form flexible film.The thickness of at present preferred barrier film is about 0.015 inch (15 mil) to about 0016 inch (16 mil).The width of at present preferred barrier is about 81-83 inch.The weight of at present preferred barrier is about 327g/m ²Eight layers of at present preferred film are shown among Figure 21 with the cross section.

Following with reference to Figure 21, barrier film 110 comprises outer 112 and 114.Outer 112 and 114 by extruding coating class polyolefin plastic body (trade name and model: Affinity ^PT1450 is available from Dow chemical company), colored concentrate (by a kind of mixture that the Colortech Co., Ltd of the Brampton of Ontario, Canada produces, is the carbon black Vulcan that is produced by Cabot company ^9 with the mixture of LDPE) and extruding coating level polyethylene (Novapol ^LC-0522-A is available from Nova chemicals Canada Co., Ltd) mixture make.Be used for making outer 112,114 material and also refer to following " newly-generated resin " or " NGR ".Being used for making outer 112,114 material helps to provide ultraviolet protection and heat seal to barrier.Outer 112,114 fusing point is about 110 ℃.Outer 112,114 life expectancy expectation equates with the moisture barrier of using in building course at present, and expects that when underground applying this material can continue the uncertain time.In preferred implementation, outer 112,114 thickness is about 0.0011 inch (1.1 mil), and have about 26 gram materials/square metre.

Outer 112,114 the inside is that agricultural chemicals keeps layer 116,118.Agricultural chemicals keeps layer 116, the 118 product Saranex by Dow chemical company ^14 make.Saranex ^14 fusing point is higher than 143 ℃, and be sure of can not biological degradation or photodegradative.Saranex ^14 is coextrusion products of five layers, and it is made of low density polyethylene (LDPE), vinylidene chloride/vinyl chloride copolymer (being Saran), ethylene and silica.In preferred implementation, by Saranex ^14 make the layer thickness be about 0.002 inch (2 mil), areal concentration be about 53 the gram materials/square metre.

In the inside that agricultural chemicals keeps layer 116, by the tack coat 120 that agricultural chemicals is kept layer 116 and fiber fabric layer 122 bondings get up.Tack coat 120 is by keeping layer identical materials to make with agricultural chemicals.In preferred implementation, the thickness of tack coat 120 is about 0.0011 inch (1.1 mil), and areal concentration is about LDPE/ square metre of 26 gram.

Fiber fabric layer 122 is by high density polyethylene (HDPE), particularly available from the Sclair of Nova chemical company ^HDPE No.99G makes.Fiber fabric layer is preferably woven HDPE.The HDPE that is used for making fiber fabric layer 122 extrudes in flakes and cuts into band.Then, with belt precharge and be spun into sheet, sheet packed into wear strength character to provide to stretch to resist in the barrier film 110.The HDPE that is used for making fiber fabric layer 12 is very similar to the resin that is used for making common water pipe, and expectation has the similar life-span.In preferred implementation, the thickness of fiber fabric layer 122 is about 0.004 inch (4 mil), areal concentration be about 63 the gram materials/square metre.

Tack coat 126 bonds together fiber fabric layer 122 and active layer 128.Tack coat 126 is the extruding coating level polyethylene available from Nova chemicals Canada Co., Ltd, as Novapol ^LC-0522-A.The fusing point of tack coat 126 is about 165 ℃.In preferred implementation, the thickness of tack coat 126 is about 0.001 inch (1 mil), areal concentration be about 25 the gram materials/square metre.

Between tack coat 126 and agricultural chemicals maintenance layer 118 is active layer 128.In some embodiments of the present invention, active layer 128 is by the carbon black of the cyhalothrin industry solution (85 weight %) of about 0.82-1 weight %, about 0.85-1.05 weight %, make available from the dim #6 (being also referred to as dim ultra-fine #6) of General Carbon company and low density polyethylene (LDPE) (LDPE) resin of about 20.9-23.1 weight %.In another embodiment, active layer 128 is made by the cyhalothrin of 11.74 weight % in the industry solution of 85.2 weight %, the dim #6 of 10.87 weight % and low density polyethylene (LDPE) (LDPE) resin of 77.39 weight %.Preferably, the LDPE resin is the PE XU59400.00 (being also referred to as PE XU59400) available from Dow chemical company, the extruding coating level LDPE of metallocene catalysis.The selection of concrete LDPE is decided by its about 80 ℃ low melting point and extruding coating performance thereof.In preferred implementation, the weight of active layer 128 is about 23% of barrier film 110, and thickness is about 0.002 inch (2 mil), areal concentration be about 45 the gram materials/square metre.

In above-mentioned eight layers barrier film, outer 112 and 114 account for 22.2% of barrier film 110 weight together with tack coat 120.Agricultural chemicals keeps layer 116.118 to account for 29.7% of barrier film 110 weight together.Fiber fabric layer accounts for 17.8% of barrier film 110 weight.Tack coat 126 accounts for 6.4% of barrier film 110 weight.Active layer 128 accounts for 23.9% of barrier film 110 weight.

Bioactive chemical substance is higher than bioactive chemical substance from the rate of release of barrier film 110 to the outside of barrier film 110 from the rate of release of tack coat 126 each layer to other.The rate of release that records the cyhalothrin in preferred eight layers of embodiment is less than 0.002 μ g/cm ²/ day.Barrier film 110 is used for preventing that the organism that damages timber from entering works, makes that simultaneously cyhalothrin concentration in other environment around soil reaches is minimum.

Another suitable multilayered barrier can be made of six thin strata compound films, and wherein each layer bonds together mutually to form flexible film.In one embodiment, the thickness of six strata compound films is about 0.012 inch (12 mil), and width is about the 81-83 inch, and weight is about 263g/m ²The cross section of each layer of a kind of suitable six tunics is shown among Figure 24, and is described as follows.

Following with reference to Figure 24, barrier film 210 comprises outer 212,214.Barrier film 210 is used for preventing that the organism that damages timber from entering works, makes that simultaneously cyhalothrin concentration in other environment around soil reaches is minimum.In one embodiment, outer 212,214 make by extruding coating class polyolefin plastic body, colored concentrate and the above-mentioned poly mixture of extruding coating level relevant with eight tunics and that be called as " newly-generated resin " or " NGR ".Outer 212,214 thickness can be about 0.0005 inch (0.5 mil) to about 0.003 inch (3 mil), and can have about 13-78 restrain material/square metre.

Outer 212,214 the insides are that agricultural chemicals keeps layer 216,216.In one embodiment, agricultural chemicals keeps layer by above-mentioned Saranex ^14 make.Layer 216 and 218 thickness can be about 0.0005 inch (0.5 mil) to about 0.003 inch (3 mil), and have about 26-130 restrain material/square metre.

It is structure sheafs 222 that agricultural chemicals keeps the inside of layer 216.In one embodiment, structure sheaf 222 is made by above-mentioned HDPE.The thickness of structure sheaf 216 can be about 0.002 inch (2 mil) to about 0.006 inch (6 mil), and can have about 31-93 restrain material/square metre.

Between structure sheaf 222 and agricultural chemicals maintenance layer 218 is active layer 228.In one embodiment, active layer 216 is made by the cyhalothrin of 0.91 weight % in the industry solution of 85 weight %, the dim #6 of 0.95 weight % and the LDPE resin of 22 weight %.The thickness of active layer 216 can be about 0.002 inch (2 mil) to about 0.005 inch (5 mil), and can have about 22-115 restrain material/square metre.

The rate of release that records the cyhalothrin in six layers embodiment is less than 0.002 μ g/cm ²/ day.Barrier film 210 is used for preventing that the organism that damages timber from entering works, makes that simultaneously cyhalothrin concentration in other environment around soil reaches is minimum.

The present invention also provides the effective method that uses conventional commercially available device fabrication multilayered barrier.According to an aspect of the present invention, in premix, use dim or channel black is made active layer.The dim premix that makes obtains required flowability, but different with the carbon black of other kind is, dimly can not cause injurious effects to the activity of agricultural chemicals, as deactivating of agricultural chemicals. Make the method for barrier film

Above-mentioned multilayered barrier film can form by the whole bag of tricks.In one approach, with polymer beads mixed carrier such as carbon black, to form mixture.In this mixture, add one or more liquid pesticidals, simultaneously temperature is remained on below the decomposition temperature of agricultural chemicals, but will be higher than the melt temperature of agricultural chemicals to form frangible premix.Melt extrude this premix to form thin active layer.Push this premix to form barrier film with required extra play.The order of the type of the required number of plies, selected layer, layer and make the used material of each layer and determine according to various factors; the end that these factors include, but are not limited to barrier film applies, prevents the type of Len req, protected zone and/or structure that insect is invaded, concrete kind, production cost and the fund etc. of insect.

Active layer can pass through agricultural chemicals or bioactive chemical substance are combined the formation friable mixture with carrier, and the adding friable mixture prepares in polymeric matrix.Active layer also can be by mixed polymer and carrier to form polymer-carrier mixture, adds agricultural chemicals then or bioactive chemical substance prepares.

Above-mentioned eight layers barrier film 110 can form by following preferred methods.In order to produce active layer 128, in conjunction with and mix polyethylene resin and be the carbon black of dim form.Suitable blender is a Marion type blender.When using Marion type blender, seal this blender and start agitator.Mix polyethylene resin and carbon black mix and the size of carbon aggregation descends well until them.Polyvinyl resin is preferably the pill form and raw food grinds to form 35 purpose powder.The bulk temperature of this mixture should remain on below 60 ℃.

Then, the mode of spraying with fusion adds cyhalothrin gradually, continues mix polyethylene resin-black stock simultaneously.In preferred implementation, use the technical grade cyhalothrin solution of 85.2 weight %.Lasting mixing instructs each component to mix equably.For example then this mixture is stored in the plastics carrying ladle.

Then, mixture is equipped with the extruder/tablet press machine of die head to make pill by being injected.In preferred implementation, use and be equipped with the extruder/tablet press machine of 1/8 inch strand die head, and will be maintained at about 85 ℃ along the temperature along cylinder and die head length of extruder.Before the pill grain, the extruder strand may need to use water cooling.In described preferred implementation, make about 1/8 inch long pill.The subsequent drying pill.Place the hot-air cyclone dryer dry pill, perhaps, reach drier if desired, can be placed on and place 60 ℃ of forced air draft ovens dryings in the flat chassis.

Extruding premix pill also uses and presses layer method to be laminated between two multilayer films.Specifically, push the premix pill and carry out lamination between two multilayer films, this two membranes is designed to protect the bioactive premix material in the final barrier film 110.Can use conventional extruder such as single screw rod or double screw extruder to come extruding layer 128.

Two multilayer films that use in the prefabricated lamination step.First multilayer film comprises above-mentioned layer 114 and 118 (that is, by Saranex ^14 agricultural chemicals of making keep the NGR layer of layer and adjacency).Second multilayer film comprises above-mentioned layer 112,116,120,126,114 and 118 (that is NGR layer, adjacency by Saranex, ^14 agricultural chemicals of making keep layer, the NGR layer of adjacency, the HDPE layer of adjacency and the LDPE layer of adjacency).To each layer orientation of second multilayer film, the NGR layer of winning (i.e. layer 112) is positioned on the outer surface of final products.

With thick polyvinyl resin the premix pill is diluted to the desired concn of cyhalothrin and injects extruder,, form barrier film 110 with direct lamination between first and second multilayer films.In preferred implementation, the cyhalothrin concentration of barrier film 110 is 0.77 weight % of barrier film 110, or 2.75g/m ²Then, barrier film 110 rollings are become sieve and packing sell or send to coat and sew up.

In the premix, especially the moisture from carbon black can produce in process of production such as produce the problem of bubbling in active layer 128, because there is the extruder die head in this layer.This can dry premix solves in about 12 hours in about 54 ℃ insulating box by being set in temperature, had been found that this method makes the premix drying basically, did not produce thereby bubble.Also must be noted that contacting of the concentrate that will reduce ambient moisture and premix.

In addition, the carbon aggregation can form high-quality the earth's surface in barrier film 110.It is a problem that carbon is assembled, because caused the mixed and disorderly distribution of bioactive ingredients in the active layer 128 (for example cyhalothrin) like this.This problem can reduce by the carbon black component with 100 purpose silk screens screening fiber fabric layer 122 before using.Suitable carbon black distributes also can be by using high energy mixers such as Henschel type blender and double helix extruder, perhaps use control batch process (wherein using high-carbon content) to reach to increase the melt viscosity of polymer, increase the shear stress in the extruder thus, cause the distribution of carbon.The extruder that lower extruder temperature or use have the high shear mixing section also can form good carbon distribution.An example with extruder screw of shear-mixed section is the screw rod design that groove barrier line is arranged in screw rod.When using this screw rod, polymer melt is forced to blow over the barrier line near the extruder cylinder.Make polymer melt have shearing force like this, increase the distribution of carbon in the mixture thus.

The thermolysis of cyhalothrin and volatilization occur in temperature and are higher than about 160 ℃, and the loss of cyhalothrin becomes in the production process of tangible break-through point between about 160-170 ℃.Carry out in order to have to make to operate under the safe condition, preferably operating temperature is about 150 ℃. The preferred approach of non-at-scene pre-formation barrier film

At present the preferable purposes of barrier film is to prevent that dwelling house from avoiding the intrusion of termite and other wooden insect of moth that creeps.In order to prevent that insect from passing soil and entering dwelling house, barrier film of the present invention should place soil and contact with soil and the ground near the dwelling house of soil between.

Preferably make at present than dwelling house ground little with the commercially available barrier film of the present invention of sheet.Therefore, need the sheet of combination some to sketch the contours of whole ground with barrier film.For fear of between the sheet of adjacency, the crack occurring, salable, bonding or each sheet is adhered to mutually.

According to another implementation of the invention, barrier film is placed required place as the groove that places the dwelling house ground before, at non-at-scene preform or form barrier film in advance.Preferably, at each sheet of non-at-scene combination barrier material to form the preformed barrier of the whole ground that will cover dwelling house, then with its transportation and be installed in the groove of ground.Chance in that the non-at-scene shape that each sheet is combined into ground has reduced each sheet cracking or has been sealed has unfavourably stayed the slit.

Figure 22 shows the preformed barrier that is made by multi-layer polymer film.This preformed barrier can form by each section that seals described barrier.Preferably, the thermal plasticity slice who is used for sealing described each section of barrier is the skin of multilayered barrier.But each of described barrier section can use any other method (being included in each section of cover heating plastic material on the barrier sheet of closing on) to form required sheet.For example, each section can be the thermoplastic of speckle or strip.Figure 23 shows the used groove of ground of the preform barrier that is suitable for receiving Figure 22.

In the embodiment of the barrier of every square millimeter of load 2.75 μ g cyhalothrins, every square millimeter barrier contains the cyhalothrin of capacity to kill at least 24,000 eastern subterranean termite individuality.The resistances of termite and other wood borers film by barrier is kept, even in the film of barrier under the situation in porose or crack.For example, in having the barrier of size for hole below the 2mm or crack, eastern subterranean termite has caused higher termite lethality in the contact of the active component that exposes by Kong Shiyu.

Be not that each embodiment of the present invention can both provide above-mentioned each advantage.And after having studied specification carefully, other advantage of the present invention will become apparent.

Embodiment

Provide following examples by the mode of explaining, to further specify various aspects of the present invention.Like this, these embodiment do not limit the scope of the invention and should not regard as in any way just to reaching illustrative purposes. Embodiment 1

Test to determine the rate of release of chlopyrifos.Weight by polymer is benchmark, and the load factor of insecticide is 5 weight % or 10 weight %.In the time of 50 ℃, determine the rate of release of all devices.

The polymer of being estimated comprises eutectic polyethylene, polyurethane, two kinds of eutectic polyethylene that epoxides, silicon rubber and wax content are higher, to reduce the thermolysis of chlopyrifos.Studies show that the extreme heat decomposition can take place chlopyrifos when temperature surpasses about 240 ℃; Like this, the selection of polymer just is limited in does not need excessive hot worked prescription.

Table 1 has been summarized the result of these researchs.Generally speaking, polymer the problem relevant with used load factor can not occur with the compatibility of chlopyrifos.Yet, can lose some physical integrity when using polyether polyols with reduced unsaturation, and other polymeric acceptor does not have visible degraded when tying up to 50 ℃.Rate of release is from 10 μ g/cm of silicon rubber ²/ sky is to the 0.3 μ g/cm of epoxy resin B ²/ day.

The data that use table 1 provides can have the life of product of an estimation approx.The weight of supposing device is 0.5 gram, and its load is 10%, then has 50 milligrams of chlopyrifos to can be used for discharging.Like this, be 4cm for area ²Polymeric system, rate of release is 1 μ g/cm ²/ day, this just makes insecticide be enough to keep under the rising temperature 30 years.These calculating show that various pesticide products all are utilizable.

The rate of release of the selective system of table 1. polymer formulators and use chlopyrifos

Type of polymer	The content of chlopyrifos (%)	Rate of release (μ g/cm 2/ day) a
			Polyurethane	????5	????2.1±1.4 b
Epoxy resin A	????5	????＜0.1
			Polysiloxanes	????5	????10.3±3.5
Polyurethane	????10	????1.0±0.3
			Epoxy resin B	????10	????0.3±0.1
PE+ wax	????10	????1.9±0.3

^aThe rate of release of in the time of 50 ℃, measuring ^bExcessively cracking appears in material at elevated temperatures Embodiment 2

Also study, but be to use 80% pure pyrethrins with polymeric system similar to Example 1.Rate of release in the time of 40 ℃ is listed in the table 2.

The rate of release of the selective system of table 2. polymer formulators and use pyrethrins I

Type of polymer	The content of pyrethrins I (%)	Rate of release (μ g/cm 2/ day) a
			Epoxy resin A	????10	????0.5±0.2
Polysiloxanes	????10	????21.2±5.4
			Polyurethane	????10	????15.7±7.1
Epoxy resin B	????10	????0.2±0.1

^aThe rate of release of in the time of 40 ℃, measuring

The rate of release of polyurethane and polysiloxanes is the highest, and the rate of release of polyepoxide is minimum.Obvious variation is arranged on rate of release, and estimating needs with suitable bond.

Simply calculate the possible life-span that just can determine the insecticide system from the listed data of table 2.As described in embodiment 1, many changing factors that can change the life-span of rejection area are arranged. Embodiment 3

Make controlled release device, and it is tested to determine their rate of release.Absorb the carbon black of liquid pesticide and the polymer of 83-87 weight % is prepared all thermoplastic polymers with the insecticide of 10 weight %, 3 or 7 weight %, with its injection moulding into about 1/8 inch thick thin slice.Specifically, the device of being made by thermoplastic polymer and decis and cyhalothrin contains 3% carbon black.And the device of being made by remaining insecticide and thermoplastic polymer contains 7% carbon black.

Make from the polymeric blends that contains 60 weight %S-113,40 weight % castor oil and 5 weight %TIPA catalyzer by the device that S-113 polyurethane (a kind of thermosetting polymer) is made.Polymeric blends accounts for 90% of device gross weight.Insecticide, promptly decis accounts for device remaining 10%.In this device, do not use carbon black.Polymer/insecticidal compositions casting is become 1/8 inch thick sheet, and heating is about 40-60 minute in the time of about 60 ℃, to solidify the casting sheet.

Downcut 1 inch square then from the thin slice of injection moulding or casting, test the rate of release of this square block.Obtain following rate of release:

Table 3

Insecticide	Polymer	Rate of release
			Decis	S-113 polyurethane	????25.2μg/cm 2/ day
	????Aromatic?80A	????16.8μg/cm 2/ day
				????Pellethane?2102-80A	????8.8μg/cm 2/ day
	????Pellethane?2102-55D	????8.0μg/cm 2/ day
				????Alipmtic?PS-49-100	????7.2μg/cm 2/ day
Cypermethrin	Polyurethane 3100	????0.4μg/cm 2/ day
				Polyurethane 2200	????0.7μg/cm 2/ day
	????EVA?763	????27.3μg/cm 2/ day
				Polyethylene MA 778-000	????4.6μg/cm 2/ day
Cyhalothrin	Polyurethane 3100	????0.4μg/cm 2/ day
				Polyurethane 2200	????0.7μg/cm 2/ day
	????EVA?763	????27.3μg/cm 2/ day
				Polyethylene MA 778-000	????4.6μg/cm 2/ day
Tefluthrin	Polyurethane 3100	????6.4μg/cm 2/ day
				Polyurethane 2200	????25.0μg/cm 2/ day
	????EVA?763	????40.4μg/cm 2/ day
				Polyethylene MA 778-000	????27.0μg/cm 2/ day
Permethrin	Polyurethane 3100	????1.4μg/cm 2/ day
				Polyurethane 2200	????1.3μg//cm 2/ day
	????EVA?763	????28.5μg/cm 2/ day
				Polyethylene MA 778-000	????4.0μg/cm 2/ day

Embodiment 4

Test with the combination of determining cyhalothrin (pyrethroid) concentration and insecticide/polymer from polymer, discharging the influence of the rate of release of insecticide.Data are summarized in the table 4.

The rate of release of table 4. polymer/pyrethroid concentration combination

Polymer	The concentration of pyrethroid (weight %)	Rate of release (the mg/cm of pyrethroid 2/ day)
			Polyethylene-vinyl acetate copolymer (EVA)	????1	????0.3
	????5	????2.2
				????10	????2.5
Polyurethane	????1	????0.9
				????5	????4.4
	????10	????8.3
			Polyurethane/EVA (50/50)	????1	????2.6
	????5	????7.2
				????10	????9.1

Embodiment 5

Test to measure the effect of rejection area termite-proof.Select two class termite samples to do experiment: eastern subterranean termite (because of it is the most common), and coptotermes formosanus (because of its tool invasive).

Be assembled into test trough with glass container.Veneer is placed on the bottom of container.With the polymer that flooded insecticide be placed on wood chip above, make top from impregnated polymer to not having passage or perforate the wood chip.Apotrophic tommy bar is placed on the top of impregnated polymer.The data on tommy bar surface are zero, and impregnated polymer is placed tommy bar lower face 5 centimeters.Termite is placed on the surface of tommy bar, advance to mark impregnated polymer by tommy bar their every days.

The combination of impregnated polymer is listed in the table 5.

The rate of release of table 5 10 weight % pyrethroids

Polymer	Pyrethroid	Rate of release (mg/cm 2/ day)
			Polyethylene-vinyl acetate copolymer	Permethrin	????3.9
Polyethylene-vinyl acetate copolymer	Tefluthrin	????4.3
			Polyethylene-vinyl acetate copolymer	Tefluthrin (fatty acid of 2 weight %)	????3.2
Polyethylene	Permethrin	????1.4
			Polyethylene	Tefluthrin	????2.2
Polyethylene	Tefluthrin (fatty acid of 2 weight %)	????2.0

Also use in the polymer barrier, do not have pyrethroid with reference to sample.The results are shown in Figure 25 and 26.In all comparative trials, termite gnaws to bite by polymer and enters in the wood chip.Pass through poly slow by the velocity ratio of polyethylene-vinyl acetate copolymer.For all impregnated polymer, all do not pass.Because coptotermes formosanus is tool invasive like this, so compare their more close impregnated polymer with the less eastern subterranean termite of invasive.In fact, the polyethylene that contains permethrin can be subjected to the scabbing that Formosan termite maxilla bites and stays, but does not have hole or penetrate.Approximately after 12-14 days,, and under the effect of impregnated polymer, retreat even the Formosan termite is also owing to the insecticide that is discharged is repelled. Embodiment 6

Test to confirm in conjunction with the influence of carrier to rate of release.The active chemistry amount of being is tefluthrin and the cyhalothrin of 5 weight %, is the carbon black of 0 weight % and 10 weight % in conjunction with the carrier amount of being, and the high density polyethylene (HDPE) of surplus (MA 778-000).Measure rate of release after making for 6 weeks, jede Woche wipe samples wherein is to remove the active chemistry that discharges of surface accumulation.

The results are shown in Table 6.

The rate of release of table 60 weight % and 10 weight % carbon blacks

Active chemistry	Carbon black (weight %)	Rate of release (μ g/cm 2/ day)
			Tefluthrin	????0	????3.13
Tefluthrin	????10	????0.71
			Cyhalothrin	????0	????1.78
Cyhalothrin	????10	????0.81
			Cyhalothrin	????20	????0.61

Embodiment 7

Present embodiment shows a kind of method of making premix, and this premix is used to make the active layer (that is agricultural chemicals releasing layer) of barrier of the present invention subsequently.

Low density polyethylene (LDPE) (available from the PE XU59400 or the PE XU59400.00 of Dow chemical company) cryogenic grinding is become the about 35 purpose particles of particle size.Then, in Marion type agitator, polyethylene particle and dim carbon (dim ultra-fine #6 is available from General Carbon company) are mixed, be dispersed in the homogeneous mixture that formation has drying, flowable consistency in the polyethylene until carbon.Then, under about 50 ℃ inside mean temperature, operate blender, will add fusing sprinkling in this mixture available from the cyhalothrin of Syngenta company.Applied keep blender behind the cyhalothrin stirring obtaining homogeneous mixture.This premix contains the dim carbon of the cyhalothrin of the 3.2 weight % that have an appointment, about 4 weight % and the low density polyethylene (LDPE) of about 92.8 weight %.This prepolymer can place about 60-70 ℃ forced air draft oven, to reduce its moisture. Embodiment 8

The homogeneous phase premix of cyhalothrin that uses as described in example 7 above step to prepare to have about 10.0 weight % and the dim carbon of about 11.3 weight %. Embodiment 9

Except the cyhalothrin with fusing is applied to dim carbon as the first step, use the step described in the embodiment 8 to prepare premix, then, mix this mixture well to form the powder that homogeneous phase mixes.Then, add the low density polyethylene (LDPE) grind and further mix, until obtain having drying, the homodisperse mixture of flowable consistency. Embodiment 10

Except the Eirich type blender with high speed agitator is used for mixing each component, use step as described in example 7 above, prepare premix with channel black carbon (available from the Colour Black FW200 of Degussa company) and the cyhalothrin of about 9.5 weight % of about 7.9 weight %. Embodiment 11

Except moist premix, prepare premix according to embodiment 7,8 and 9.Premix is melt extruded into thigh, then thigh is cut into ball. Embodiment 12

Use the step described in the embodiment 7, preparation has the conduction level carbon black of the cyhalothrin of about 7 weight %, about 5 weight % (available from the Vulcan of Cabot company ^XC-72R) and the low density polyethylene (LDPE) of surplus (available from the Novapol of Nova chemicals Canada Co., Ltd ^LC-0522-A) premix. Embodiment 13

Premix injection moulding according to embodiment 12 preparations forms thin disk.Then, use rotating blade again the grinder dish that will be moulded cut into fragment. Embodiment 14

According to the step of embodiment 7, preparation has the premix of the low density polyethylene (LDPE) of the cyhalothrin of about 6 weight % and about 94 weight %.The premix of gained has gluing denseness. Embodiment 15

Preparation has the conduction level carbon black of the cyhalothrin (available from Zeneca company) of about 2 weight %, about 1 weight % (available from the Vulcan of Cabot company ^XC-72R) and the high density polyethylene (HDPE) of surplus (available from the Microthene of Quantum chemical company ^The premix of even composition MA77800).

The first step placed the forced air draft oven drying at least 12 hours with carbon black under about 105 ℃ temperature, perhaps until reaching constant weight.In Hobart industry dough blender, mix with the carbon black of the Powdered high density polyethylene (HDPE) that waits weight approximately with drying.Then, under continue stirring, the cyhalothrin of fusion is added in this mixture lentamente with the amount that doubles carbon black weight approximately.Additional high density polyethylene (HDPE) with capacity mixes this mixture then, is reduced to about 2 weight % with the concentration with cyhalothrin in this mixture.

Then about 290 ℃ melt extrude gained mixture, and it be cast into thickness be about 0.03 inch, the monofilm of (30 mil). Embodiment 16

Step preparation according to embodiment 15 has the conduction level carbon black of the cyhalothrin of about 2 weight %, about 1 weight % (as the Vulcan available from Cabot company ^XC72R) and the high density polyethylene (HDPE) of surplus (available from the Microthene of Quantum chemical company ^MA77800) sheet. Embodiment 17

Use the step preparation of embodiment 15 to have the high density polyethylene (HDPE) of the carbon black of the tefluthrin of about 5 weight %, about 2.5 weight % and surplus (available from the Microthene of Quantum chemical company ^MA77800) sheet. Embodiment 18

Use the step of embodiment 15 to prepare sheet with the carbon black of the tefluthrin of about 5 weight %, about 2.5 weight % and ethylene-vinyl copolymer of surplus (available from the EVA763 of Quantum chemical company). Embodiment 19

Use the step preparation of embodiment 15 to have the high density polyethylene (HDPE) of the carbon black of the tefluthrin of about 10 weight %, about 5 weight % and surplus (available from the Microthene of Quantum chemical company ^MA77800) sheet. Embodiment 20

Use the step of embodiment 15 to prepare sheet with the carbon black of the tefluthrin of about 10 weight %, about 5 weight % and vinyl-vinyl acetate copolymer of surplus (available from the EVA763 of Quantum chemical company). Embodiment 21

Use the step of embodiment 15 to prepare sheet with the carbon black of the permethrin of about 10 weight %, about 5 weight % and ethylene-vinyl copolymer of surplus (available from the EVA763 of Quantum chemical company). Embodiment 22

Use the step preparation of embodiment 15 to have the high density polyethylene (HDPE) of the carbon black of the permethrin of about 10 weight %, about 5 weight % and surplus (available from the Microthene of Quantum chemical company ^MA78000) sheet. Embodiment 23

Carry out and the thickness of cast sheet is about 0.002 inch (2 mil) at about 130 ℃ except melt extruding process, use the step preparation of embodiment 15 to have the low density polyethylene (LDPE) of the cyhalothrin of about 1 weight %, the carbon black of about 0.73 weight % (available from the Special Black 6 of Degussa company) and surplus (available from the Novapol of Nova chemicals Canada Co., Ltd ^LC-0522-A) sheet. Embodiment 24

Be about the carbon black of 3.6 weight % except working concentration is about the cyhalothrin of 5 weight % and concentration, prepare sheet with the step of embodiment 23. Embodiment 25

Except being about the cyhalothrin of 10 weight % and concentration, working concentration is about the carbon black of 7.3 weight %, basically by the embodiment 23 described sheets that prepare. Embodiment 26

Prepare sheet according to embodiment 23,24 and 25.Then, use pressure sintering that each sheet is laminated to and have Saranex ^The both sides of 14 films (available from Dow chemical company) layer. Embodiment 27

Carry out and the thickness of cast sheet is about 0.002 inch (2 mil) at about 150 ℃ except melt extruding process, use the step preparation of embodiment 15 to have the sheet of the low density polyethylene (LDPE) (available from the PE XU59400 or the PE XU59400.00 of Dow chemical company) of the cyhalothrin of the channel black charcoal (available from the Colour Black FW200 of Degussa company) of about 7.9 weight %, about 9.5 weight % and surplus. Embodiment 28

By melt extrude/laminating preparation comprises the two-layer Saranex that bonds together ^14 sheet.Tack coat is made of the component mixture described in the embodiment 26.As the first step, with the preparation of the component of tack coat as pulverous premix.Then, in the time of about 150 ℃ directly at two-layer Saranex ^Melt extrude this premix between 14. Embodiment 29

Present embodiment has been described the method for making eight synusia.Each of sheet layer composed as follows.

Layer Explanation

1 by black resin (available from the Colortech No.20413-19 of Colortech Co., Ltd), extrude and be coated with

The level polyolefin plastomers is (available from the Affinity of Dow chemical company ^PT1450) and thick

Degree is about the low density polyethylene (LDPE) of 0.001 inch (1 mil) (available from Nova chemicals Canada

The Novapol of Co., Ltd ^LC-0522-A) the newly-generated resin (NGR) of Zu Chenging (available from

Fabrene Co., Ltd) layer;

2 by vinylidene chloride/vinyl chloride copolymer, low density polyethylene (LDPE), ethylene,

And thickness is about the Saranex of the silica formation of 0.002 inch (2 mil) ^14 (available from

Dow chemical company) layer;

3 above-mentioned NGR layers;

4 by high density polyethylene (HDPE) (available from the Sclair of Nova chemical company ^HDPE No.99G),

And the carbon black resin that thickness is about 0.004 inch (4 mil) is (available from Cabot company

Plasbalck ^PE1371) fabric of Gou Chenging (available from Fabrene Co., Ltd) layer;

The 5 black resins that contain thickness about 0.001 inch (1 mil) (available from Colortech Co., Ltd

Colortech No.20413-19) (Canada is limited available from the Nova chemicals for low density polyethylene (LDPE)

The Novapol of company ^LC-0522-A) articulamentum;

6 by channel black carbon (available from the Colour Black FW200 of Degussa company), cyhalothrin,

And thickness to be about the low density polyethylene (LDPE) of 0.002 inch (2 mil) (public available from Dow chemistry

The PE XU59400 or the PE XU59400.00 of department) the active component layer that constitutes;

7 above-mentioned Saranex ^14 layers;

8 above-mentioned NGR layers.

Eight synusia are bonded to Saranex by using the extruding coating method with one deck NGR (layer 1) ^The compound that 14 (layers 2) are gone up with cambium 1-2 forms.Melt extrude another layer NGR (layer 3), with layer 1-2 compound and fabric sheet (layer 4) bonding, with cambium 1-2-3 compound.By the extruding coating method one deck low density polyethylene (LDPE) (layer 5) is applied on layer 1-2-3 compound, to form first skin.

By using the extruding coating method that one deck NGR (layer 8) is applied to a slice Saranex ^Prepared layer 7-8 compound comes up 14 layers (layers 7).

Use the step manufacturing of embodiment 10 to have the premix of the low density polyethylene (LDPE) of the cyhalothrin of channel black carbon, 9.5 weight % of about 7.9 weight % and surplus.Use the step of embodiment 11 that this premix is configured as the active component pill.Mix this active component pill and low density polyethylene (LDPE) pill (available from the PE XU59400 or the PE XU59400.00 of Dow chemical company) with about 2: 1 ratio, make that the concentration of cyhalothrin reaches about 6 weight % in the pellet blend.

Charging pellet blend in extruder is to melt extrude bonding first skin (that is layer 112,116,120,122 and 126) and second skin (that is layer 118 and 114).Form the multilayer layer compressing tablet that gross thickness is about 0.014 inch (14 mil).The concentration of cyhalothrin is about 0.9 weight % in the laminate that forms. Embodiment 30

Except active layer is made of the low density polyethylene (LDPE) (available from the PE XU59400 or the PE XU59400.00 of Dow chemical company) of the channel black carbon (available from the Colour BlackFW200 of Degussa company) of about 4 weight %, about 4.7% cyhalothrin and surplus, use the step of embodiment 29 to prepare sheet.The concentration of cyhalothrin is about 0.5 weight % in the laminate that forms. Embodiment 31-37

Premix by dim carbon (dim ultra-fine #6 is available from General Carbon company), cyhalothrin and low density polyethylene (LDPE) (available from the PE XU59400 or the PE XU59400.00 of Dow chemical company) prepares sheet.Basically use the step of embodiment 29 that each sheet is configured as each pressure layer, but the ultimate density of cyhalothrin is listed in the table below 7 in the laminate that forms.

Table 7

Embodiment	Dim carbon (weight %)	Cyhalothrin (weight %)	Cyhalothrin in the laminate (weight %)
				?31	?4	?3.5	?1
?32	?2	?1.8	?0.5
				?33	?1	?0.88	?0.25
?34	?0.5	?0.44	?0.12
				?35	?0.25	?0.22	?0.06
?36	?0.125	?0.11	?0.03
				?37	?0.06	?0.05	?0.01

Embodiment 38

Six synusia with following composition form in the following manner:

Layer Explanation

1 by black resin (available from the Colortech No.20413-19 of Colortech Co., Ltd), extrude and be coated with

The level polyolefin plastomers is (available from the Affinity of Dow chemical company ^PT1450) and low

Density polyethylene is (available from the Novapol of Nova chemicals Canada Co., Ltd ^LC-0522-A)

Newly-generated resin (NGR) (available from the Fabrene Co., Ltd) layer of forming;

2 by vinylidene chloride/vinyl chloride copolymer, low density polyethylene (LDPE), ethylene,

And the Saranex of silica formation ^14 (available from Dow chemical companies) layer;

3 by high density polyethylene (HDPE) (available from the Sclair of Nova chemical company ^HDPE No.99G) constitutes

Fiber fabric layer;

4 by the cyhalothrin of 0.91 weight % in the industry solution of 85 weight %, the lamp of 0.95 weight %

The active component layer that the LDPE resin of black #6 and 22 weight % constitutes;

5 above-mentioned Saranex ^14 layers;

6 above-mentioned NGR layers.

Described six synusia are mainly used in the concrete steel plate method of american forestry office (USFS).This concrete flat slab method has been quickened the formation of the concrete foundation of casting.In order to set up the experimental field, remove leaf and rubble, on a face of ground, to expose one 24 inches square region.To place cleaning area central authorities by 21 inches square wooden frames of 1 inch * 1 inch dragon spruce bar manufacturing, and directly in the soil of handling, dig 2.2 inches dark ditches.With the loss of pvc pipe covering, and prevent that rainwater and sunlight from influencing termiticide with the minimizing moisture.

The results are shown in following table 8 in the test of the concrete flat slab field in following place.

Table 8

The place	The termite kind	The replicate test % that does not pass
				Use six synusia	Be untreated
		?Florida(USFS)	Reticulitermes?flavipes			?100	?60
?Arizona(USFS)	Reticulitermes?flavipes			?100	?50
		?Mississippi(USFS)	Reticulitermes?flavipes			?100	?100
?Malacca(USFS)	Globitermes?sulphureus			?100	?30

As shown in table 8, the experimental field of handling with six synusia does not have one to be passed by termite.

Though the present invention with reference to one or more concrete embodiments describe, person of skill in the art will appreciate that, under condit without departing from the spirit and scope of the present invention, can carry out many modifications to the present invention.Each and their change that meet in these embodiments of spirit of the present invention will be included within the scope of the present invention that is limited by following claims.

Claims (76)

1. multilayered barrier of resisting insect, it comprises:

At least one deck agricultural chemicals releasing layer, and

At least one deck keeps layer with the agricultural chemicals of the parallel placement of described agricultural chemicals releasing layer, and described agricultural chemicals releasing layer contains at least a agricultural chemicals, and described agricultural chemicals keeps layer that very a spot of agricultural chemicals release is passed through.

2. multilayered barrier according to claim 1 is characterized in that: described agricultural chemicals keeps layer to comprise Saranex ^

3. multilayered barrier according to claim 1 is characterized in that: described two-layer agricultural chemicals keeps layer to be positioned at two offsides of described agricultural chemicals releasing layer.

4. multilayered barrier according to claim 1 is characterized in that: described agricultural chemicals keeps layer to be made by polymeric material, and described polymeric material does not allow agricultural chemicals discharge from barrier basically.

5. multilayered barrier according to claim 1 is characterized in that, described agricultural chemicals releasing layer comprises:

Polymeric matrix; And

Agricultural chemicals in the matrix.

6. multilayered barrier according to claim 5 is characterized in that: described agricultural chemicals is selected from pyrethroid, newly intends nicotine, isofenphos, sumicidin, pyrethrins and their combination.

7. multilayered barrier according to claim 5 is characterized in that: described agricultural chemicals is selected from tefluthrin, permethrin, cyhalothrin, Chryson, decis, cypermethrin, cyphenothrin, cyfloxylate, decis, chlopyrifos, ABG-6215, basudin, antiphen, methyl-isorhodanate, pentachlorophenol, tralomethrin, chlorfenapyr, fluorine worm nitrile, newly intends nicotine and their combination.

8. multilayered barrier according to claim 5 is characterized in that: described agricultural chemicals is a cyhalothrin.

9. multilayered barrier according to claim 5 is characterized in that: described polymeric matrix is made by low density polyethylene (LDPE).

10. multilayered barrier according to claim 5 is characterized in that: described polyethylene is a linear low density polyethylene (LLDPE).

11. multilayered barrier according to claim 1 is characterized in that: it also comprise one deck at least be positioned at agricultural chemicals keep layer, the bactericide releasing layer in order to prevent that barrier from being damaged by fungi.

12. multilayered barrier according to claim 1 is characterized in that: it also comprise one deck at least be positioned at agricultural chemicals keep layer, usefulness is so that barrier has intensity and resistance wears the resistance of performance and wear the intensity layer.

13. multilayered barrier according to claim 12 is characterized in that: described resistance is worn the intensity layer and is made by the macromolecular fibre fabric.

14. multilayered barrier according to claim 13 is characterized in that: described resistance is worn the intensity layer and is made by polyethylene.

15. multilayered barrier according to claim 1 is characterized in that: described agricultural chemicals is to termite, moth carpented ant and to eat into wooden insect effective.

16. multilayered barrier according to claim 1 is characterized in that: described barrier be formed on zone or structure around.

17. multilayered barrier according to claim 1 is characterized in that: the rate of release of described agricultural chemicals from barrier is less than 0.4 μ g/cm ²/ day.

18. multilayered barrier according to claim 5 is characterized in that: described matrix comprises a polymer, and it also comprises a carrier to regulate the rate of release of agricultural chemicals from matrix.

19. a manufacturing is used for the method for premix of the active layer of barrier film, the active layer of this barrier film is used to prevent that moth from entering the zone or containing wood structure, and described method comprises following steps:

(a) mixed carbon black and polymer beads form mixture;

(b) in this mixture, add one or more liquid pesticidals, form frangible premix.

20. one kind is used for preventing that moth from entering the zone or containing the multilayered barrier film of wood structure, this barrier film comprises:

Ground floor, it comprises the protectiveness resin;

The second layer, it comprises the agricultural chemicals maintenance material that prevents that basically agricultural chemicals from passing through;

The 3rd layer, it comprises the protectiveness resin;

The 4th layer, it comprises to resist wears the intensity film;

Layer 5, it comprises cohesive polymers;

Layer 6, it comprises the polymeric matrix that contains carbon black and one or more agricultural chemicals;

Layer 7, it comprises agricultural chemicals and keeps material;

The 8th layer, it is made by the protectiveness resin, and wherein, agricultural chemicals is higher than the speed that agricultural chemicals discharges from the speed that layer 6 discharges into other layer from barrier film, and does not have agricultural chemicals to discharge from barrier film itself basically.

21. barrier film according to claim 20 is characterized in that: described protectiveness resin is polyolefin plastomers, colored concentrate and poly mixture.

22. barrier film according to claim 20 is characterized in that: described protectiveness resin provides ultraviolet protection to barrier.

23. barrier film according to claim 20 is characterized in that: described agricultural chemicals keeps material to prevent that basically agricultural chemicals from discharging from barrier film.

24. barrier film according to claim 20 is characterized in that: described second and the material of layer 7 be that fusing point is higher than about 143 ℃ polymer, and can biological degradation and light degradation.

25. barrier film according to claim 20 is characterized in that: described second and the material of layer 7 comprise Saranex ^14.

26. barrier film according to claim 25 is characterized in that: described Saranex ^14 are made of low density polyethylene (LDPE), vinylidene chloride/vinyl chloride copolymer, ethylene and silica.

27. barrier film according to claim 20 is characterized in that: described the 3rd layer resin is polyolefin plastomers, colored concentrate and poly mixture.

28. barrier film according to claim 20 is characterized in that: make by the high density polyethylene (HDPE) fabric for described the 4th layer.

29. barrier film according to claim 20 is characterized in that: described layer 5 comprises the low density polyethylene (LDPE) that fusing point is about 165 ℃.

30. barrier film according to claim 20 is characterized in that: the carbon black of described layer 6 is dim.

31. barrier film according to claim 20 is characterized in that: the polymeric matrix of described layer 6 comprises low density polyethylene (LDPE).

32. barrier film according to claim 20 is characterized in that: the polymeric matrix of described layer 6 comprises the low density polyethylene (LDPE) of metallocene catalysis.

33. barrier film according to claim 31 is characterized in that: the fusing point of described low density polyethylene (LDPE) is about 80 ℃.

34. barrier film according to claim 20 is characterized in that: the amount of at least a agricultural chemicals in the described layer 6 can make it can not exhaust in about 10 years.

35. barrier film according to claim 20 is characterized in that: at least a agricultural chemicals in the described layer 6 accounts at least 5% of layer 6 weight.

36. barrier film according to claim 20 is characterized in that: at least a agricultural chemicals in the described layer 6 accounts at least 10% of layer 6 weight.

37. barrier film according to claim 20 is characterized in that: at least a agricultural chemicals in the described layer 6 is a cyhalothrin.

38. according to the described barrier film of claim 37, it is characterized in that: the cyhalothrin in the described layer 6 exists with the amount of every square metre of barrier film at least about 2.75g.

39. barrier film according to claim 20 is characterized in that: at least a agricultural chemicals in the described layer 6 is the biologically active chemical substance of low volatility.

40. barrier film according to claim 20 is characterized in that: at least a agricultural chemicals in the described layer 6 is selected from pyrethroid, isofenphos, sumicidin, cypermethrin, pyrethrins, ABG-6215, chlopyrifos, basudin, methyl-isorhodanate, pentachlorophenol, tralomethrin and their combination.

41. barrier film according to claim 20 is characterized in that: at least a agricultural chemicals in the described layer 6 is selected from tefluthrin, permethrin, cyhalothrin, Chryson, decis, cypermethrin, cyphenothrin, cyfloxylate, decis, chlopyrifos, ABG-6215, basudin, antiphen, methyl-isorhodanate, pentachlorophenol, tralomethrin, chlorfenapyr, fluorine worm nitrile, newly intends nicotine and their combination.

42. barrier film according to claim 20 is characterized in that: at least a agricultural chemicals in the described layer 6 is selected from thiophene worm piperazine, Nitenpyram, Imidacloprid, thiophene worm amine, pyridine worm miaow, thiophene worm quinoline and their combination.

43. barrier film according to claim 20 is characterized in that: described layer 6 is by mixing described agricultural chemicals and carbon black, forms friable mixture, and adds this friable mixture make in described polymeric matrix.

44. barrier film according to claim 20 is characterized in that: described layer 6 comprises at least a agricultural chemicals that mixes at least a bactericide.

45. according to the described barrier film of claim 44, it is characterized in that: described bactericide is selected from trichloronitromethane, methyl-isorhodanate and 1, the mixture of 3-dichloropropane, N-methyl dithiocarbonic acids sodium, 2,3,5,6-tetrachloro-1,9-benzoquinones, nitrolim, biphenyl, copper naphthenate, antiphen, fentin hydroxide and their combination.

46. barrier film according to claim 20 is characterized in that: described polymeric matrix accounts for the about 77% of layer 6 weight, and layer 6 accounts for about 23% of barrier film weight.

47. barrier film according to claim 20 is characterized in that: described carbon black accounts for about 11% of layer 6 weight.

48. barrier film according to claim 20 is characterized in that: described polymeric matrix is hydrophobic.

49. barrier film according to claim 20 is characterized in that: the thickness of hydrophobic barrier film is about 0.010-0.030 inch.

50. one kind is used for preventing that moth from entering the zone or containing the multilayered barrier of wooden structures, this barrier film comprises:

Ground floor, it comprises the protectiveness resin, and this protectiveness resin comprises polyolefin plastomers, colored concentrate and poly mixture;

The second layer, it comprises the agricultural chemicals maintenance material that prevents that basically agricultural chemicals from passing through;

The 3rd layer, it comprises the protectiveness resin, and this protectiveness resin comprises polyolefin plastomers, colored concentrate and poly mixture;

The 4th layer, it comprises to resist wears the intensity film, and this resistance is worn the intensity film and comprised high density polyethylene (HDPE);

Layer 5, it comprises low density polyethylene (LDPE);

Layer 6, it comprises the polymeric matrix that contains carbon black and one or more agricultural chemicals;

Layer 7, it comprises agricultural chemicals and keeps material;

The 8th layer; it is made by the protectiveness resin; this protectiveness resin comprises polyolefin plastomers, colored concentrate and poly mixture; wherein; agricultural chemicals is higher than the speed that agricultural chemicals discharges from the speed that layer 6 discharges into other layer from barrier film, and does not have agricultural chemicals to discharge from barrier film itself basically.

51. according to the described barrier film of claim 50, it is characterized in that: described agricultural chemicals keeps material to comprise Saranex ^14.

52. according to the described barrier film of claim 50, it is characterized in that: described carbon black is dim.

53. a method of making barrier film, described method comprises following steps:

Mixed carbon black and polymer beads form mixture;

In this mixture, add one or more liquid pesticidals, keep the temperature of this mixture to be lower than the temperature that agricultural chemicals decomposes simultaneously, but be higher than the fusion temperature of agricultural chemicals, form frangible premix;

Premix is melt extruded, form thin active layer;

Premix is extruded with first and second protectiveness resin, multilayer film, low density polyethylene (LDPE) and fabric, formed eight layers barrier film, wherein:

Ground floor, it comprises the first protectiveness resin;

The second layer, it comprises the agricultural chemicals maintenance film that prevents that basically agricultural chemicals from passing through;

The 3rd layer, it comprises the second protectiveness resin;

The 4th layer, it comprises fabric;

Layer 5, it comprises low density polyethylene (LDPE);

Layer 6, it comprises an active layer, and this active layer contains the mixture of polymeric matrix, carbon black and one or more agricultural chemicals of layer 6;

Layer 7, it comprises agricultural chemicals and keeps film;

The 8th layer, it comprises the first protectiveness resin makes, and wherein, agricultural chemicals is higher than the speed that agricultural chemicals discharges from the speed that layer 6 discharges into other layer from barrier film, and does not have agricultural chemicals to discharge from barrier film itself basically.

54. according to the described barrier film of claim 53, it is characterized in that: described agricultural chemicals keeps film to comprise Saranex ^14.

55. according to the described barrier film of claim 53, it is characterized in that: described carbon black is dim.

56. according to the described barrier film of claim 53, it is characterized in that: described carbon black is a channel black.

57. a multilayered barrier that tackles insect, it comprises:

At least one deck comprises the agricultural chemicals releasing layer of polymeric matrix, and this matrix comprises agricultural chemicals and carrier, described matrix and the release of carrier control agricultural chemicals from matrix;

The two-layer agricultural chemicals that is positioned at two offsides of described agricultural chemicals releasing layer keeps layer, and described agricultural chemicals releasing layer contains at least a agricultural chemicals, and described agricultural chemicals keeps layer that very a spot of agricultural chemicals release is passed through.

58. according to the described multilayered barrier of claim 57, it is characterized in that: described agricultural chemicals keeps layer to comprise Saranex ^

59. according to the described multilayered barrier of claim 57, it is characterized in that: described agricultural chemicals keeps layer to be made by polymeric material, and described polymeric material does not allow agricultural chemicals discharge from barrier basically.

60. according to the described multilayered barrier of claim 57, it is characterized in that: it is about 0.001-0.005 inch that described agricultural chemicals keeps the thickness of layer.

61. according to the described multilayered barrier of claim 57, it is characterized in that: described agricultural chemicals is selected from pyrethroid, newly intends nicotine, isofenphos, sumicidin, pyrethrins and their combination.

62. according to the described multilayered barrier of claim 57, it is characterized in that: described agricultural chemicals is selected from tefluthrin, permethrin, cyhalothrin, Chryson, decis, cypermethrin, cyphenothrin, cyfloxylate, decis, chlopyrifos, ABG-6215, basudin, antiphen, methyl-isorhodanate, pentachlorophenol, tralomethrin, chlorfenapyr, fluorine worm nitrile, newly intends nicotine and their combination.

63. according to the described barrier film of claim 57, it is characterized in that: described agricultural chemicals is selected from thiophene worm piperazine, Nitenpyram, Imidacloprid, thiophene worm amine, pyridine worm miaow, thiophene worm quinoline and their combination.

64. according to the described multilayered barrier of claim 57, it is characterized in that: described agricultural chemicals is a cyhalothrin.

65. according to the described multilayered barrier of claim 57, it is characterized in that: described polymeric matrix is made by low density polyethylene (LDPE).

66. according to the described multilayered barrier of claim 65, it is characterized in that: described polyethylene is a linear low density polyethylene (LLDPE).

67. according to the described multilayered barrier of claim 57, it is characterized in that: described carrier is dim.

68. according to the described multilayered barrier of claim 57, it is characterized in that: the thickness of described agricultural chemicals releasing layer is about 0.001-0.005 inch.

69. according to the described multilayered barrier of claim 57, it is characterized in that: described agricultural chemicals releasing layer also comprises at least a bactericide, described bactericide is selected from trichloronitromethane, methyl-isorhodanate and 1, the mixture of 3-dichloropropane, N-methyl dithiocarbonic acids sodium, 2,3,5,6-tetrachloro-1,9-benzoquinones, nitrolim, biphenyl, copper naphthenate, antiphen, fentin hydroxide and their combination.

70., it is characterized in that according to the described multilayered barrier of claim 57: it also comprise one deck at least be positioned at agricultural chemicals keep layer, the bactericide releasing layer in order to prevent that barrier from being damaged by fungi.

71., it is characterized in that according to the described multilayered barrier of claim 57: it also comprise one deck at least be positioned at agricultural chemicals keep layer, usefulness is so that barrier has intensity and resistance wears the resistance of performance and wear the intensity layer.

72. according to the described multilayered barrier of claim 71, it is characterized in that: described resistance is worn the intensity layer and is made by the macromolecular fibre fabric.

73. according to the described multilayered barrier of claim 71, it is characterized in that: described resistance is worn the intensity layer and is made by the high density polyethylene (HDPE) fabric.

74. according to the described multilayered barrier of claim 57, it is characterized in that: the thickness on described barrier film is about 0.010-0.030 inch.

75. according to the described multilayered barrier of claim 57, it is characterized in that: it also comprises one deck protective layer at least, and ultraviolet light is avoided on the protection barrier film, and provides sealing to the barrier film.

76. according to the described multilayered barrier of claim 75, it is characterized in that: the layer of described protectiveness is made by the sealable polymer of heat.

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