The present invention attempts to overcome the defective of known package container, and the packing container of on-aqueous liquid is provided, and packing container has the following advantageous characteristic:
The chemicals of packing only with just effusion after water contact, water is used for dissolving or disperseing chemicals, is reduced to bottom line thereby undiluted material contacted with environment or human or animal's chance.
Can provide to be suitable for chemicals water-reducible with scheduled volume, unit dosage form, needn't measure out undiluted chemicals.
The chemicals of packing is easy to use: before the use chemicals, a chemicals of packing is placed in the water simply and gets final product.
The safe handling process that proposes in order to wash the residue chemicals from container can be cancelled, and has avoided contaminated with the container that the chemicals of packing is contacted, so that they are handled.
Big quantity of fluid as greater than 1/4 liter liquid, can be packed under the dangerous situation that does not have packing container to leak basically or lost efficacy.
According to a packing container provided by the invention, can hold 1/4 and rise to 3 liters liquid, this liquid is a kind of chemicals or solution or the dispersion liquid of chemicals in organic liquid.Liquid is contained in the strip of paper used for sealing, and strip of paper used for sealing is to be made of water-soluble material or water-dispersible material undissolved in liquid and that do not disperse, and strip of paper used for sealing comprises a water-soluble or water dispersible flexible wall.
Should be appreciated that the liquid or solid chemicals can disperse in organic liquid, dispersion liquid can be such as a kind of emulsion or suspension.
Preferably the strip of paper used for sealing of splendid attire chemicals is carried out the part can, so that leave air space in strip of paper used for sealing, the space accounts for the strip of paper used for sealing volume of 2%-40% greatly, preferably accounts for the strip of paper used for sealing volume of 4%-10%.Can adopt bigger space, but so as if lack the coml attractive force.If strip of paper used for sealing stands vibrations, the strip of paper used for sealing of part can reduce the danger of breaking, and under the situation that temperature increases, can reduce the danger of breaking or leaking, and temperature can make the capsule bag expand or sweating.
The volume of carrying liquid is preferably from partly rising to 2 liters, partly to be upgraded to the best.
This packing has been avoided the difficulty that exists in the above-mentioned prior art.Use this packing, earlier an amount of water that measures is injected container, for example in the water tank of sprinkler, then the strip of paper used for sealing such as capsule or bag is taken out from container, such as the taking-up of tumbling, it is entirely put into the container that measures the water yield in advance is housed, and stir.At this moment, as the dissolving or when disperseing, the strip of paper used for sealing inclusion is just overflowed fully in containing the water of chemicals of the material of making capsule or bag.When chemicals mixes with big water gaging since it be in airtight always and the packages sealed state under, therefore do not exist chemicals to produce the possibility of sprinkling.When mixing, only when the diluted chemical goods, occur splashing, this point of generation is splashed or is unrestrained, does not cause the philtrum poison certainly or destroys environment.
The chemicals that can pack comprises that those have genotoxic potential or damaging or the material of infringement property is arranged to health of human body or to environment.They comprise as bactericidal agent, agricultural chemicals such as insecticide or herbicide is (as the hydroxy-phenylformonitrile herbicide, as Brominal or sulphur benzene nitrile or as the derivant of salt or lipid, as Heptanoates or Octanoates: a kind of compound that can use bromoxynil ester and sulphur benzonitrile ester), in general, they are dissolved or chemicalss of disperseing in big water gaging or in liquid, aqueous, metronidazole cmpd for example, be used for the anti-damaging object of aqueous industrial liquid, or add cmpd in the swimming pool to, photo supplies, ink, dyestuff, water-free organic acid and cement additire.Insecticide comprises as appending to the molluscicide in pond or the river.When the strip of paper used for sealing material was the PVA borate, chloride and chlorite can significantly cause the strip of paper used for sealing material rotten to a great extent, generally they can not be put into the liquid of packing, or the tamper seal leather material made it not be subjected to chloride and chloritic the influence.
Be insoluble to and be used to dissolve or disperse the suitable water-soluble or water-dispersible material of the organic solvent of chemicals to comprise polyoxyethylene or methylcellulose, but strip of paper used for sealing such as capsule or bag are preferably by polyvinyl alcohol film, be local alcoholysis or complete alcoholysis or hydrolysis, for example 40~99%, preferably the polyethylene acetate film of 70~92% alcoholysis or hydrolysis is made.
Polyvinyl alcohol film can be non-orientation, uniaxial orientation, biaxial orientation.Water-soluble material is best.The material that uses normally cold water solubles is separated, and the PVA that cold water solubles is separated is for best.Should be appreciated that when the liquid of packing dissolves in warm water or hot water or disperses, also can use other material.
The maximum tensile strength of strip of paper used for sealing material preferably reaches 20N/mm at least
2, the best is to 80N/mm from 30
2, breaking extension is preferably 200% to 380%, and the best is 220% to 350%, and measuring these numerical value is that 23 ℃ and relative humidity are to make under 50% the condition in temperature normally.The thickness of strip of paper used for sealing material is 10 to 500 microns, and the best is 20 to 100 microns.The strip of paper used for sealing material preferably has these physical property combination of features.
Polyvinyl alcohol material can be squeezed into pipe, makes its expansion by biaxial orientation then, or adopts the cast polyethylene process to make best.When the casting film method is thought desirable method, form pipe one end by film after, dress is irritated the chemicals of requirement.Above a certain amount of chemicals near strip of paper used for sealing, seal pipe again, formed a leak free capsule or bag.The air space that stays is preferably above the liquid in airtight strip of paper used for sealing, in addition, space and liquid in conjunction with volume preferably less than the volume of the maximum possible of strip of paper used for sealing so that make strip of paper used for sealing reach loose can, and can make its can be crooked.
For make or airtight packing container of the present invention in comprise the strip of paper used for sealing of liquid, when implementing heat seal, seal temperature is normally from 140 ℃ to 220 ℃, best 160 ℃ to 180 ℃.Intermediate plate pressure is generally 1 to 3 1/2 kg/cm
2, best 1 1/2 kg/cm
2To 2 1/2 kg/cm
2Dwell time is generally 200 milliseconds to 1.5 seconds, preferably 450 milliseconds to 1 second.
For guaranteeing the optimal process performance, be that 15 to 25 ℃ and relative humidity (RH) are to implement heat seal in 15% to 85% the scope normally in temperature.Relative humidity preferably 35% to 55% for obtaining suitable heat seal, need be made some routine tests according to the strip of paper used for sealing material, as selecting specific grade and the thickness of PVA.The leak free quality perhaps under the situation that does not have the liquid inclusion, can be tested by making capsule bag inflation by visualize zone of opacity or bubble.The defective of seal aspect can cause the deficiency of the water-soluble or water dispersible of leak free.Heat seal equipment by routine can be implemented the heat seal operation, and this heat seal equipment should allow to control and change the temperature of sealing intermediate plate, intermediate plate pressure and dwell time.
In practice, strip of paper used for sealing of the present invention about 10 minutes with the interior thing that contains that can overflow in it.When packing Plant Quarantine chemicals, the chemicals of packing will be placed in the conventional sprinkling case.Spray and do not fill the packing chemicals of water and adding in the case usually.When spraying case and have the device that stirs water, the capsule inclusion will overflow faster.Be preferably in and be less than 1 minute, as in 30 to 40 seconds, overflowing with interior effusion.Should be appreciated that the used time of effusion chemicals depends on many factors of removing beyond the capsule bag character, comprising the temperature and the stirring intensity of water.
When strip of paper used for sealing is a capsule or bag, wall thickness should remain to a minimum value, and for helping dissolving or dispersion rapidly in water, the wall thickness of capsule that provides or bag should have suitable intensity, although big sack may need thicker wall, the thickness that is approximately 30 microns is specially suitable.Wall is thick more, and is long more to the time of dissolving that wall material carried out or dispersion.Should be appreciated that strip of paper used for sealing of the present invention can comprise a wall district, this zone is easier to be more dissolved or disperse than remainder, so that contain thing in the strip of paper used for sealing of more promptly overflowing.
Suitable organic liquid solvent comprises petroleum-based solvent, for example ligroin, mineral oil, aliphatic hydrocarbon or aromatic hydrocarbon, as n-hexane, normal octane, thiacyclohexane, benzene, dimethylbenzene and naphthalene ball, halogenation aliphatics or aromatic hydrocarbon, for example amyl acetate, ketone, for example cyclohexanone, ether or high ethanol (low ethanol can move by above mentioned water-soluble or water-dispersible material: this can cause the product that comes across outside the strip of paper used for sealing) of carbon tetrachloride, methenyl choloride, Methochloride and chlorobenzene, lipid for example.Should understand, also can use solvent mixture, for example have the varsol compound of other solvent, for example copper or high ethanol.Organic liquid must be quite dry, and the representative type organic liquid contains and is less than 2% to 3% moisture content and unlikelyly leaks from strip of paper used for sealing prematurely to guarantee it.
Liquid in the strip of paper used for sealing contains thing and can be thickened or make its thixotroping.Stand mechanical shock as packing container, especially when strip of paper used for sealing comprised a flexible wall, the viscosity that the interior liquid of increase strip of paper used for sealing contains thing can reduce contingent strip of paper used for sealing and break.By adding inclusion, as close organic substance or amargosite, lecithin, poly-methylene acid or the silica gel of modification, the viscosity or the thixotroping that can strengthen the strip of paper used for sealing inclusion.
Term " modification parent organically " is meant parent organically (thereby dissolve each other with non-water content in the strip of paper used for sealing) and modification and make it to increase viscosity.
Usually, custom is used dissolving or is dispersed in concentrate pesticidal or herbicide in the organic liquid: in order to reduce the volume of each strip of paper used for sealing, can increase concentration.Can select any suitable orthobaric volume though people know, preferably each strip of paper used for sealing comprises the volume about 500 milliliters at least, and wishes preferably the inclusion of can splendid attire suitable orthobaric volume, for example 500 milliliters or 1 liter.
Preferably the strip of paper used for sealing after the can is packaged in the water repellant outer layer container; for example being called in our name has more detailed description in the application undetermined of " flexible package punch " (it relates to a kind of liquid package container; comprise the outer layer container that has damping base and comprise the water-soluble of liquid or water dispersible strip of paper used for sealing; it promptly protects strip of paper used for sealing to avoid the effect of water and too early dissolving, also plays the effect of second barrier layere simultaneously between virose liquid that concentrate and possible and operating personal and environment.Outer layer container can have the shape that can pack two or more strips of paper used for sealing that is made of plastics, and outer layer container can have sealing and leak free lid more again.Yet each strip of paper used for sealing preferably is packaged in the independent outer layer container separately.In the case, outer layer container preferably thermoplastic material is made, and annotates or blowing forms an outer layer container by mould, and it has one is flat flange top basically, a sidewall and a pedestal.Strip of paper used for sealing after the can places in the outer layer container, then paper tinsel system top seal to being on the flat flange top basically, thereby a complete fully enclosed and leak free outer layer container are provided.Representative type paper tinsel system top cover is made by aluminium foil, and is heat sealed on the top flange of outer layer container, but it also can be made by plastic foil or laminated paper, plastics and/or aluminium.
Preferably top seal is arrived the outer layer container top, if strip of paper used for sealing breaks, so that the good barrier layere of an anti-leak to be provided, it is the biggest slightly that top cover cans be compared to the top of outer layer container most, thereby so that provide an easy clamping to remove the flap of top cover.
Preferably as paper/aluminium/plastic lamination goods, wherein plastic layer can be heat-sealed on the top cover that gas tight seal is provided the lamination top cover.Aluminium lamination provides a barrier layere of any pin hole that prevents to occur on the plastic layer.Ply of paper has certain intensity and processing characteristics, and can print on ply of paper or bonding trade mark.Plastic material is polyethylene terephthalate (PET) preferably, this material provides a good barrier layere for preventing the leakage that may occur, and has a good heat seal, can remove top cover at an easy rate before using, when top cover is removed, it does not comprise the halogen to the environment structure potential damage, and can antidetonation.Also can use other plastic material, as polyvinylidene chloride (PVDC), polyvinyl alcohol, polypropylene or nylon.
Outer layer container preferably stamps the characteristic of information, guide for use and any other involved chemical of relevant strip of paper used for sealing inclusion and the warning of toxicity.These information can be stated from the paper tinsel system top cover or be attached on the trade mark of outer layer container sidewall.
The space of strip of paper used for sealing and outer layer container (preferably accounts for 5% of outer layer container volume at least greatly, this space preferably is not more than 30% of outer layer container volume, be preferably 20-25%: can take bigger space, but this may not possess commercial appeal, optimal selection accounts for 25% greatly).Best and the atmospheric isolation in space is for example in the dense envelope of the enterprising promoting the circulation of qi of outer layer container.Be that the relative humidity in the space preferably 45%-70%(is preferably 50-60% under 20 ℃ the condition in temperature, about 50% is good).When the strip of paper used for sealing material was the PVA film, the mechanical characteristics of film was subjected to the influence of its humidity, the humidity of film and in strip of paper used for sealing the humidity in the space between air space and strip of paper used for sealing and the outer layer container balance each other.Equilibrium point changes with temperature, thus storage period film not only can absorb moisture but also the moisture of can overflowing.Having found that, is under 20 ℃ the condition in temperature, and under the relative humidity of 45%-70%, the strip of paper used for sealing material can be kept best storage characteristics.
According to best manner of packing of the present invention, a crash-resistant double casing is provided, it can transport concentrated chemicals safely, and makes when handling the delayed toxicity pharmaceutical chemicals dangerous minimum to personnel and environment.
Following example illustrates the manufacture method of water soluble package of the present invention.
Use the equipment of conventional manufacturing capsule bag, adopt the PVA film to comprise the herbicidal capsule bag of liquid by following step manufacturing.
The PVA film that uses is a SYNTANA type KA cold water soluble PVA film, and its thickness is 40 microns, and has 88% gram-molecule saponification degree.
The liquid herbicide is the Brominal that dissolves in the naphthalene ball solvent and the compound of ioxynil lipid.The moisture that comprises in the liquid is less than 3%.
Opened type capsule bag is by the PVA thin film fabrication, by forming a shoulder, the bottom of simultaneous hot-sealing capsule bag and side then around the PVA film.The intermediate plate pressure that uses is 2kg/cm
2, the intermediate plate temperature is 160 ℃, the dwell time is 1 second.Ambient temperature is 18 ℃, and relative temperature is 35%.
Then, 500 milliliters of liquid herbicide are dispensed in the capsule bag, it is 4%~5% space that the capsule planted agent leaves volume, sealed pouch top afterwards, and the size of each capsule bag is 120mm * 250mm, per minute is made 10 capsule bags.
After putting into liquid, the capsule bag top after each can is sealed, leave the space of 4% to 5% volume in the capsule bag, the liquid of can 80% in the capsule.Therefore do not fill fully in the capsule, air space is left in the liquid top.
Each capsule bag is put into outer layer container by shown in the accompanying drawing.The outer layer container material is a polypropylene.Each outer layer container is with comprising PET(polyethylene terephthalate), the lamination top seal of aluminium and ply of paper.Pet layer is heat sealed on the apical margin of outer layer container, leaves air space between capsule bag and the outer layer container.When temperature was 20 ℃, the relative humidity in this space was 50%.
The detailed example of packing container of the present invention is described in conjunction with the accompanying drawings, wherein:
Packing container comprises outer layer container 1, it have around with capsule of osed top strip of paper used for sealing 3(or the bag) paper tinsel system lid 2.Capsule or bag 3 are to be made by the polyvinyl alcohol film 4 of cold water soluble, film 4 is made up of the poly-vinyl acetate of 88% alcoholysis, the wall thickness of film 4 is 30 microns, and is heat-sealed into a sack shape, and this sack can 500 milliliters of dispersion things 5 that concentrate in organic liquid of splendid attire.Sack 3 is loaded in the outer layer container 1, and outer layer container 1 comprises it being straight apical margin 6 substantially, and apical margin 6 is connected with tapered sidewalls 8 by last collar portion 7.Outer layer container 1 also comprises base 9, and base 9 is connected by the least significant end of shock absorbing part 10 with sidewall 8.Fig. 2 has clearly illustrated that outer layer container has an approximate rectangular cross-sectional plane, and this rectangular cross section has radiused corners between adjacent side, and has the surface of outside bow action.The rectangle outer layer container is fit to a plurality of outer layer containers are packaging together quite effectively.Outer layer container also have as shown in Figure 1 to inferior pyramidal, be 3 ° to 4 ° with angle that vertical plane is in this case, when container is emptied,, can be sleeved on many outer layer containers together for ease of storing or handling.Taper also means and can move downward with prevention by the wall supporting sack of outer layer container.Outer layer container 1 is with having high melt flow index and have uniform wall thickness, as be about the 1mm wall thickness, block polymer polypropylene mould injection forming.Outer layer container is made semi-translucent, and is as described below, so that detect the leakage of sack under the situation that needn't open outer layer container.In alternative embodiment, only base is made semi-translucent, therefore can see leakage situation.In addition, polypropylene material is water repellant, and this makes outer layer container be easier to washing.In this embodiment, the material polypropylene of making shell has enough flintinesses, and it can support and protect sack, but it also has to a certain degree flexible, thisly flexiblely helps damping or is blow molded into packing container.
Shock absorbing part 10 is bent into S shape cross-sectional plane as shown in Figure 3, and the length of cross-sectional plane is approximately 9: 1 with its thickness ratio, considers the intensity of making the shock absorbing part material, selects this ratio can obtain desired sinuousness.
The cross section of bending constitutes usually the lower edge of sidewall 8 is connected to horizontal connection on the upper limb of base 9, and it can bend owing to the elasticity of thermoplastic material itself, allows to occur a little between base 9 and the sidewall 8 a bit relative moving up and down.This bending has absorbed the shock loads that is applied to outer layer container 1, as losing accidentally in transportation or lay days outer layer container.During transportation package holds, comprise the such packing container of a row by transported on trucks or even when being lifted up and down by fork truck, may fall or stand sizable shock loads at least.The shock absorbing part that forms between the sidewall of base and outer layer container is crooked also to absorb this shock loads, and partial buffer impose on load on the strip of paper used for sealing, simultaneously when applying this shock loads, can guarantee that container is unlikely splits.Equally, shift out packing container from any outer layer container after, before the container of unpacking was near strip of paper used for sealing, if packing container is lost on hardstand by accident, bumper can absorbing load.Especially occur on the base as falling of packing container, shock absorbing part has absorbed any shock loads that puts on the outer layer container.Equally, occur in the side wall of outer shell part if fall, the circular arc characteristic of sidewall means that the sidewall energy is also crooked and then absorbs any shock loads.In addition,, also can cause bending, with this absorbing vibration load if fall on the apical margin that occurs in outer layer container.
As can be seen from Figure 2, base 9 has by the core around deep-slotted chip breaker 11 protuberances.Deep-slotted chip breaker provides collection some liquid of accidental spillage from sack before use.When outer layer container or when this part of outer layer container is semi-translucent at least; Open before the outer layer container, the user might check pedestal, and looks at whether sack leaks.Can avoid like this contacting with the chance of leakage.From Fig. 2 as seen, leave a space, formation leak free cavity when outer layer container places on the shelf below the core of base protuberance.This may produce some problems, because when sack bleeds outer layer container, the steam that concentrate this moment can enter cavity by the material of outer layer container, and steam is gathered in the cavity, and any coating on possibility etch shelf or the frame.Therefore, allow to have one at least radially towards the groove of base or the drafting apparatus of groove (not shown) in groove 11 downsides formation.
In this embodiment, dogleg section 10 also provides an interior annular shoulder of parking sack.The bending curved surface provides the smooth surface that does not make the sack tension or puncture sack.Therefore, on sack was supported at the bottom of the outer layer container, its result had further completely cut off mechanical shock.Sack also may be bent under state of stress and enter the damping space.
For easy to use, the inside of outer layer container is processed into very smooth surface specially, so that sack easily skids off from outer layer container.
Sack 3 is retained in the outer layer container 1 by paper tinsel system lid 2, and 2 heat-sealings of paper tinsel system lid are perhaps used another kind of method on the flange 6 of outer layer container 1, connected by adhesives.
In this embodiment, paper tinsel system lid 2 is made as polyethylene terephthalate/aluminium/paper laminate by the laminated material that can seal, and bigger than the external diameter of flange 6, and to stay the big flap around outer layer container, this flap can be used to tear lid.
Outer layer container 1 is used to protect sack 3 with lid 2 and protects sack 3 to avoid contacting with water, thereby prevents its too early dissolving.Outer layer container 1 and lid 2 also provide a secondary retention layer around the enrichedmaterial 5 in capsule or the sack 3, and under the situation of capsule or bag breakage, the secondary retention layer that provides can stop potential harmful chemicals 5 to contact with people or surrounding environment.Yet, for using this enrichedmaterial, only paper tinsel system lid 2 is removed, then the sack that is still sealing is put into the watering case of the sprinkler that comprises predetermined water gaging.Material 4 in capsule or the sack is dissolving rapidly in water, mixes so that the interior thing 5 of bag is scattered in the interior water of sprinkler water tank fully.Outer layer container 1 can be infected with the chemicals that concentrates, and need not to adopt any special safety method just can be removed.The personnel that handle the concentrating chemical goods will not be in contact with it, so reduced and relevant harm and the risk of these potential objectionable impuritiess of processing.