CN105153608B - A kind of production technology of water-resistant polyvinyl alcohol film and its application of obtained polyvinyl alcohol film - Google Patents
A kind of production technology of water-resistant polyvinyl alcohol film and its application of obtained polyvinyl alcohol film Download PDFInfo
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- CN105153608B CN105153608B CN201510641488.0A CN201510641488A CN105153608B CN 105153608 B CN105153608 B CN 105153608B CN 201510641488 A CN201510641488 A CN 201510641488A CN 105153608 B CN105153608 B CN 105153608B
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Abstract
The invention discloses it is a kind of with water resistance can water-soluble polyvinyl alcohol film production technology.Current aqueous solution casting method production polyvinyl alcohol film has higher Energy Consumption Cost, and extrusion by melting is difficult to obtain preferable water resistance film.The present invention using polyvinyl alcohol resin and other raw material components it is blended successively be swelled, extrude, salivating, drying, being heat-treated, trimming and winding process form water-resistant polyvinyl alcohol film；Described mixing swell process is as follows：After each raw material components metering, mixing is stirred in the Hot mixer heated with chuck；When mixing terminal, the polyvinyl alcohol resin granules swell of gained and does not have free moisture into the transparent g., jelly-like of elastic adhesion between particle.The present invention is swelled polyvinyl alcohol resin absorption moisture by heating mixing, so as to reduce the melting temperature of polyvinyl alcohol resin, can substantially reduce the energy resource consumption of production process, and can reduce even can be without plasticizer.
Description
Technical field
It is specifically a kind of that there is water resistance as what protective garment was used the present invention relates to plastic sheeting technical field
Can water-soluble polyvinyl alcohol film production technology and its application of obtained polyvinyl alcohol film.
Background technology
Disposable Protection Product, such as medical operating clothes, surgical operation towel, isolating and protecting clothes, solid radiation particulate protective garment
Deng its instant mode abandoned is provided convenience to medical personnel, patient, nuclear industry staff, greatly reduces relevant people
The risk that member occurs cross-infection in treatment and the course of work, polluted by harmful substance, declines infection rate after abortion operation, carries significantly
High health of people level, reduces the use of antibiotic.In order to improve the isolation pathogen or nuisance of disposable protective clothing
The ability of matter, protective garment generally uses composite material, wherein the most best material surely belonged to Film laminated of reliable, performance.It is existing
Some film and non-weaving cloth composite material, with extremely superior to harmful substance barrier property, and it is ventilative frivolous, dress is relaxed
It is suitable, had a wide range of applications in medical treatment, special type protection, chemical defence field.
However, the disposable Protection Product discarded object constantly produced, huge challenge is brought to processing work.As once
Property may include disease-producing pathogens using Biohazard Waste, collect, packaging, transport and processing procedure in, exist leakage and
Spread risk；Moreover, disposable medical discarded object often variet complexity, the sorting work of before processing is dangerous big, workload is numerous
It is multiple；Importantly, disposable medical discarded object is all the high polymer material manufacture for being difficult to degrade mostly, even if long-term also without
Method is destroyed by natural degradation.
Existing disposable medical refuse processing method, is destroyed by the way of being burned after sterilization.This method is not
But the substantial amounts of energy is consumed, and produces the incineration tail gas containing many toxic and harmful gas, exhaust emission atmosphere, influence is burnt
The resident burnt around place is healthy.And for nuclear industry Protection Product discarded object, Protection Product in use,
It is possible to be infected with radioactive ash, these contaminated things are not suitable for carrying out burning disposals, can only compression seal landfill, not only expense
It is high, and radioactive pollutant is behind in dozens or even hundreds of year, it all there are harm groundwater resources, even may
The risk of new radioactive pollution source is formed in the natural calamity of generation or geological disaster.
CN104292573A discloses a kind of manufacture method of environment protection biological degradable material.The invention uses PLA material
Material, can be pollution-free using the bacterial degradation in soil by compost, landfill after discarded.But, as Biohazard Waste,
The bio-degradable expendable material manufactured with PLA, however it remains sterilization is difficult, need the complex process such as landfill, and
Biodegradation Times are also long, and cost is high-leveled and difficult with suitable for disposable product；Especially, the biodegrading process of this material is to close
It is invalid for the nuclear industry protective garment discarded object that packing is buried.
CN103280250A disclose it is a kind of with biodegradable polyvinyl alcohol material make Protection Product and it
Refuse processing method.The protective garment is used for nuclear power station, using can be dissolved in hot water after discarded, and possibility is removed by filtration
After in contaminating radioactivity dust, solution discharge to soil, degraded by soil bacteria.Thus method, is developed with water-soluble anti-
Product is protected, to meet this Protection Product offal treatment technique as the task of top priority.However, the waste water that the processing method is produced,
In city can not emission treatment, limited by many national environmental regulations.
CN102307727A and CN103252951A disclose a kind of protective materials of MULTILAYER COMPOSITE, and it is by polyethylene
Alcohol non-woven cloth and polyvinyl alcohol film are composited, as the polyvinyl alcohol film for realizing harmful substance iris action, not only
With good penetrability, the wears performance of light and comfortable does not dissolve characteristic with more the water under normal-temperature water, and in high-temperature water
In quick water dissolving characteristic completely, disclosure satisfy that refuse processing method disclosed in CN103280250A.But this patent does not have
Relate to the production method of the water-soluble polyvinyl alcohol film.
CN1973974A and CN101367953A disclose a kind of production method of water-soluble polyvinyl alcohol film, the party
Method prepares its aqueous solution using water as solvent, in a kettle., and manufactures water-soluble polyvinyl alcohol film using rubbing method.Due to this
Method can use 99% alcoholysis degree polyvinyl alcohol resin in formula, as few as possible to add even without plasticizer, and poly- second is not destroyed
After the crystal property of enol, film appropriate heat treatment, the high crystallinity of comparison can be obtained, the film produced has good
Normal-temperature water indissolubility and high-temperature water rapid dissolution, disclosure satisfy that refuse processing method disclosed in CN103280250A.But
It is that, because the aqueous solution that described method is prepared is limited to viscosity, its concentration can not possibly be too high, and highest can not in production practices
More than 20%.In the not high aqueous solution of this concentration, there is substantial amounts of water, the substantial amounts of energy is needed in being dried in the later stage so that its
In production cost, energy cost is higher, is not suitable as the inexpensive feature needed for disposable Protection Product is promoted.
For the melting extrusion technique of melting temperature and the close polyvinyl alcohol of decomposition temperature that realize highly crystalline, to drop
The drawbacks of energy resource consumption that low aqueous solution casting method is brought is high, CN102391598B discloses a kind of polyvinyl alcohol resin and a large amount of
Plasticizer carries out once granulation, the salivation film production process with stabilizer and modifying agent second melting.Due to adding in formula
Substantial amounts of polyol plasticiser is added so that distance is increased between polyvinyl alcohol molecule, has been difficult to form hydrogen bond, crystallinity drop between hydroxyl
It is low so that polyvinyl alcohol complex melting temperature declines, and has obtained certain process window.However, also just because of with the addition of
Plasticizer, hydrogen bond is produced between limiting hydroxyl, after crystallinity declines, and causes the decline of its water resistance, and water is met at normal temperatures and is become
Dissolving must be easy to, wet strength declines, when its film being made is used for during Protection Product is combined, lose due barrier
Energy.
CN102241862A discloses a kind of polyvinyl alcohol melting extrusion technique with certain water resistance, is increased using adding
The method for moulding agent, reduces the melting temperature of polyvinyl alcohol, and using crosslinking agents such as addition dialdehyde, boric acid, polyisocyanates, it is right
Cross-linking reaction is realized between polyvinyl alcohol molecule, is allowed to form certain network structure, the water resistance of product is improved.But, adding
Increasing amount plasticizer, loses after crystal property, relies only on the not high crosslinking of intermolecular cross-linking degree, meets water and is still easily swelled,
After the wet strength that can not have been obtained, and crosslinking, the water-soluble of polyvinyl alcohol can degenerate, it is impossible to be adapted to CN103280250A public
The refuse processing method opened.
CN101565513B is disclosed a kind of polyvinyl alcohol heat stabilizer and melted using the polyvinyl alcohol of the heat stabilizer
Melt the method for extruded product.Described heat stabilizer includes free base absorbant, free radical stabilizer and active material absorbent,
Wherein described free radical absorbent includes main absorbent and absorbefacient, and main absorbent includes alkylphenol compoundses, alkylidene
Phenolic compound, alkyl bisphenol class compound, hydroxy phenyl acrylic ester compound, aminophenolses, thiobisphenol
Class compound or its combination；Absorbefacient include hydroxyl esters compound, saturation acid esters compound, thio ester type compound,
Phosphorous ester type compound or its combination；The free radical stabilizer including Ca, Ba, Sn etc. metal formation organic salt, by Zn
Or organic ester salt, cyclohexadione compounds and the organic metal salt of formation such as Cd or its combination.The active material absorbent bag
Include combination, inorganic base and/or the inorganic salts of inorganic base, inorganic salts, inorganic base and inorganic salts and the combination of many methylol compounds,
With above-mentioned substance or combination and the combination of Nano compound.Carried out with this scheme in polyvinyl alcohol melting extrusion film, its product
Nitrogen phosphate and sulfur and organic metal salt compound will be contained containing a variety of.These compounds after Protection Product is discarded, with
Refuse processing method disclosed in CN103280250A is carried out after dissolution process, and the solid matter of larger particles will block filter screen,
Operating cost is caused to rise；After smaller particle is with solution discharge, it is possible to soil pollution can be caused；Used moreover, working as
When refuse processing method disclosed in CN102754167A carries out thermal oxide and the catalytic oxidation treatment solution, metal salt is in hot oxygen
The change stage forms metal oxide, blocks catalytic reactor, causes catalyst failure, and after the formation oxide such as nitrogen phosphate and sulfur,
Air is discharged into because Water spray can not absorb, its oxide contaminant atmospheric environment；Recirculated water absorbs the oxidation of nitrogen phosphate and sulfur repeatedly
After thing, the higher and higher strong acid of concentration is formed, serious corrosion will be produced to equipment.
CN101864132A discloses a kind of polyvinyl alcohol melting extrusion scheme, using part small molecule plasticizer and part
The method of polymeric plasticizer mixing plasticising, obtains the melting extrusion of polyvinyl alcohol.Due to Polymeric plasticizers and polyethylene
The compatibility of alcohol is not high, and its plasticising amount is little, and in small molecule plasticizer, water can volatilize in process, final products
In, actual plasticising dosage is less than addition, and water resistance can make moderate progress.However, just because of the low boiling of water, can 140 DEG C with
, easily there is bubble in extrusion process in a large amount of evaporation gasifications under upper processing temperature inside product, influence film appearance and
Performance.
CN101580618B discloses a kind of method for preparing polyvinyl alcohol film.This method is added largely in dispensing
Cosolvent, auxiliary forms the solution of polyvinyl alcohol debita spissitudo and used for moulding process, after film forming, will be latent molten with heat
Agent evaporates to form finished product.In this scheme, the volatilization of cosolvent needs to use the baking carried out at 150 DEG C to film 20-40 minutes
Roasting, production efficiency is very low, and the cosolvent of volatilization is organic solvent, into atmosphere pollution air, and Partial Species
Cosolvent also has certain toxicity, either evaporate into air or residual is in film, all can generation environment and safety ask
Topic；And the specific energy consumption cost produced with this scheme is also at a relatively high.
CN1164251A provides a kind of manufacture method of water resistance film, according to the program, first with plasticizer to poly-
Vinyl alcohol is carried out after plasticising extrusion, film forming, extracts the plasticizer in film with methanol, then film is dried
And heat treatment, obtain water-fast film.In this technique, the process of plasticizer in film is extracted with methanol, because methanol is not only
Combustible and explosive articles, and there is stronger toxicity to human body, this technical process is from safety or environmental protection all it is difficult to real
It is existing.Also, the methanol residue of plasticizer-containing after extracting, it is necessary to carry out separation regeneration, extracts and higher boiling plasticising is produced after methanol
Agent raffinate mixture, forms waste liquid and is difficult to handle.
CN86104040C discloses a kind of production method of inflation film, after the invention uses resin and be water-swellable, through squeezing
Go out machine melting extrusion, gear pump-metered, filtering, deaeration, static mixer temperature adjustment, film forming is blown into blowing head, through normal temperature
Lower biaxial tension obtains product.In this complex technical process, its technique, the high-viscosity melt of the poly-vinyl alcohol solution formation of melting
How deaeration is problem, and in patent also without reference to.The patent application has 20 years or so so far, but in the market does not have
Occurred using the product of the technique productions, fully demonstrate and production is difficult to using the technique.
CN103937269A, CN103937270A, CN103881398A, CN103865091A, CN103865275A are disclosed
The method that water-resistant polyvinyl alcohol film is prepared using chemic modified method.In these methods, using some poisonous and hazardousization
Raw material is learned, not only production process is complicated, and technical process is dangerous big, and environmental pollution is also easy to produce using chemical solvent, produces
Inefficiency, and easily residual in the film, influences using safety harmful substance.
The content of the invention
The present invention has higher Energy Consumption Cost for current aqueous solution casting method production polyvinyl alcohol film, and melts
Melting the contradiction that extrusion molding is difficult to obtain between preferable water resistance film again, there is provided a kind of improved water-resistant polyvinyl alcohol film
Production technology, allows its water-resistant polyvinyl alcohol film produced to be dissolved in high-temperature water, and can reduce in production process
Energy resource consumption.
Therefore, the present invention is adopted the following technical scheme that：A kind of production technology of water-resistant polyvinyl alcohol film, using poly-
Vinyl alcohol resin and other raw material components it is blended successively be swelled, extrude, salivating, drying, being heat-treated, trimming and winding process shape
Into water-resistant polyvinyl alcohol film；
The mass percent of the polyvinyl alcohol resin and other raw material components is as follows：Polyvinyl alcohol resin 30-60%, increasing
Agent 0-8%, surfactant 0.1-0.5% and water 39.9-64.5% are moulded, the wherein degree of polymerization of polyvinyl alcohol resin is 500-
2600, alcoholysis degree is more than 99%；Plasticizer be glycerine, propane diols, ethylene glycol, butanediol, diethylene glycol, triethylene glycol,
One or several kinds in PEG400-6000, triethanolamine, caprolactam；Surfactant is dodecyl sodium sulfate, fat
One or several kinds in alcohol, aliphatic acid, polyethylene glycol oxide ether, modified silicon oil；
Described mixing swell process is as follows：After each raw material components metering, stirred in the Hot mixer heated with chuck
Mix mixing, chuck constant temperature medium heating-up temperature is 80-95 DEG C, incorporation time is 10-240 minute, speed of agitator is 5-90 turns/
Point；When mixing terminal, the polyvinyl alcohol resin particle of gained is swelled, and volumetric expansion is into original 1-15 times, and outward appearance is resilient
The transparent g., jelly-like of adhesion, makes do not have free moisture between particle, and polyvinyl alcohol swellable particles are quickly transferred into cooling mixing
Room temperature is cooled in machine；
Described expressing technique is as follows：Described polyvinyl alcohol swellable particles feeding band is vertically forced into the in the same direction of charging oar
Double screw extruder, parallel dual-screw extruding machine band steam vent, steam vent removes vacuum tube, in emptying state；Double spiral shells in the same direction
The charge door temperature of bar extruder is set in 20-80 DEG C, and remaining each area's temperature is set in 80-105 DEG C；
The charging of the flange in the parallel dual-screw extruding machine exit one insulation feed pipe and a single screw extrusion machine
Mouth is connected, and pressure sensor is housed on this insulation feed pipe, pressure is set as 0.05-0.5MPa, it is same to set Stress control with this
To the screw speed of double screw extruder；Flange one utilidor and a casting die head in the single screw extrusion machine exit
It is connected.
The present invention is swelled polyvinyl alcohol resin absorption moisture by heating mixing, so as to reduce the molten of polyvinyl alcohol resin
Melt temperature, the consumption that can reduce plasticizer even can be without.
Further, described casting die head possesses thermostatic control system, and its temperature is set in 75-100 DEG C, close to a salivation
Roller is set, and the dynamic mould release membrance movement thereon of salivation roller strap, the polyvinyl alcohol melt of casting die head extrusion is uniformly coated on mould release membrance
On, subsequently into oven for drying, drying temperature is at 90-140 DEG C.
Further, it is described salivation roller at least one end wallboard on fix one with salivate roller it is concentric with the big of bearing
Gear, gear wheel is engaged with a little gear, and the rotation of gear wheel is driven by the rotation of little gear；Described casting die head is installed
Can be in left and right and movable mounting seat one, the lower section of the mounting seat is provided with a fulcrum bearing；Shape on described gear wheel
Into a fulcrum bearing, mounting seat and casting die head and its linkage board interlocked, the rotation of gear wheel drives fulcrum bearing, mounting seat and stream
Saliva die head can be rotated relative to salivation roller；Being internally formed for the casting die head one is used to hold the closed chamber of polyvinyl alcohol melt
Body；It is provided with an inlet communicated with airtight cavity, madial wall and is formed and airtight cavity on the lateral wall of the casting die head
Utilidor is connected at the die lip mouth communicated, described inlet.
The present invention makes casting die head be rotated relative to salivation roller using the rotation of gear wheel, until the die lip mouth of casting die head
Direction discharge straight down and perpendicular to salivation roller surface；Movable by mounting seat adjusts salivation roller and casting die head
Between gap, the salivation position of casting die head is adjusted by moving left and right for mounting seat.The present invention is in use, can use
The polyvinyl alcohol melt prepared is delivered directly to airtight cavity by gear pump or other fluid delivery systems by utilidor
In, then polyvinyl alcohol melt is salivated on mould release membrance by casting die head；Salivation roller rotates it with transmission device, so that
Drive mould release membrance movement thereon.
Further, the bottom surface of the mounting seat is fixedly connected with a guide rail, and the guide rail is arranged on multiple track bases and can phase
Moved left and right for track base, described fulcrum bearing is used to drive the drive device that guide rail is moved left and right provided with one.Track base
For supporting and limit guide rail, guide rail is set to move left and right but can not move forward and backward thereon, described drive device can be
Cylinder or hydraulic cylinder, moving left and right for mounting seat and casting die head is realized by driving guide rail to move left and right.
Further, described track base is fixedly connected on a movable plate that can be moved forward and backward, and the movable plate is flexibly connected
In fulcrum bearing.Movable by movable plate drives the movable of track base, so as to realize mounting seat and salivation mould
Head it is movable.
Further, it is provided with described fulcrum bearing under at least one longitudinally disposed dovetail groove, the bottom of the movable plate
Convex into the sliding block being placed in dovetail groove.The movable of movable plate is realized by slip of the sliding block in dovetail groove.
Further, at least one cylinder for being used to drive movable plate movable is installed in described fulcrum bearing, it is described
Cylinder can also be using other drive devices such as hydraulic cylinders.
Further, equipped with one casting die head can be made to be mounted opposite the control assembly of seat rotation in described mounting seat, passed through
Control assembly makes casting die head be mounted opposite seat rotation, the die lip mouth discharging angle of adjustment casting die head；Described control assembly
The worm screw used including worm gear and with worm gear, the outer end of the worm screw is equipped with adjusting handle；Described mounting seat includes bottom
Plate and two side plates installed in bottom plate side, the two ends of the casting die head are connected by a rotating shaft with side plate, described
In worm gear connection one of which rotating shaft.Operation adjusting handle rotates worm screw, also makes worm gear wheel, so as to drive salivation mould
Head is rotated relative to mounting seat, realizes that casting die head salivates the regulation of angle.
Further, it is respectively arranged with 60-120 mesh on the flange in parallel dual-screw extruding machine and the single screw extrusion machine exit
Screen pack, for the solid impurity in filter stock, the pressure in increase extrusion barrel；The charging of parallel dual-screw extruding machine
Mouth temperature setting is preferably at 40-60 DEG C.
Another technical scheme of the present invention is to provide the application for the polyvinyl alcohol film that above-mentioned production technology is obtained, water resistance
Polyvinyl alcohol film is compounded to form multilayer materials with polyvinyl alcohol nonwovens, for manufacturing medical protective garment or core work
Industry isolating and protecting product.After disposable, it can be formed and entered in aqueous solution discharge soil by dissolving, filtering technique
Row is biodegradable, or is decomposed by spraying thermal oxide and catalysis oxidation are quick and complete, and product can be with qualified discharge air, no dirt
Dye.
The invention has the advantages that：1) polyvinyl alcohol film production technology of the present invention, is not changing original
Under the premise of the water resistance for carrying out aqueous solution salivation film, the energy resource consumption of production process can be substantially reduced, with raw water solution stream
Saliva method is compared, and can reduce more than the 85% of moisture evaporation institute calorific requirement, i.e., product energy consumption per ton evaporates moisture the need for original
6 tons are reduced to minimum 0.7 ton.2) the water-resistant polyvinyl alcohol film manufactured using the method for the invention, can obtain can
Meet the multilayer composite lining film with practical value of medical treatment or special industrial (such as nuclear industry) protection applications, with this
The MULTILAYER COMPOSITE Protection Product of film production, normal temperature can be used under with plurality of liquid environment, with good harmful substance
Iris action.Protection Product it is disposable it is discarded after, can be realized by techniques such as dissolving, filtering, thermal oxide, catalytic degradations
Innoxious quick destruction, for medical institutions and nuclear industry provide its discarded object can fast and safely inexpensive harmless treatment protection
Fabric.3) due to the present invention make polyvinyl alcohol melt die lip mouth discharging before be a closed system, thus will not produce because
Polyvinyl alcohol bath surface skinning caused by solvent volatilization, so as to avoid the film caused by polyvinyl alcohol melt skinning
Surface defect, improves product quality by a relatively large margin；The present invention can adjust the salivation angles and positions of casting die head, obtain not
Same salivation coated options, obtain the polyvinyl alcohol film product of various different sizes.
Brief description of the drawings
Fig. 1 is present invention Hot mixer used and the structural representation of cooling mixing machine.
Fig. 2 vertically forces the partial structural diagram of the parallel dual-screw extruding machine of charging for present invention band used.
Fig. 3 is the equipment drawing used in present invention extrusion and curtain coating technology.
Fig. 4 is the structure chart of slobbering machine die head of the present invention.
In figure, 1- Hot mixers, 2- chuck constant temperature media, 3- Hot mixer agitating shafts, 4- Hot mixer stirring slurries, 5- heat
Mixer discharge mouthful, 6- cooling mixing machines, 7- parallel dual-screw extruding machines, 8- vertically forces charging to starch, 9- loading hoppers, 10- spiral shells
Bar, 12- pressure sensors, 13- insulation feed pipes, the flange in 14- parallel dual-screw extruding machines exit, 15- Single screw extrusions
Machine, 16- casting die heads, 17- salivation rollers, 18- mould release membrances, the unseasoned film of 19- polyvinyl alcohol, 20- single screw extrusion machines exit
Flange, 21- utilidors, 22- cooling mixing machine agitating shafts, 23- cooling mixing machine stirring slurries, 24- cooling mixing machine dischargings
Mouthful, 25- gear wheels, 26- little gears, 27- mounting seats, 28- fulcrum bearings, 29- linkage boards, 30- inlets, 31- guide rails, 32- is led
Rail chair, 33- drive devices, 34- movable plates, 35- dovetail grooves, 36- sliding blocks, 37- cylinders, 38- worm gears, 39- worm screws, 40- regulations
Handwheel, 41- bottom plates, 42- side plates, 43- rotating shafts.
Embodiment
With reference to specification drawings and specific embodiments, the present invention is further illustrated.
The production technology of water-resistant polyvinyl alcohol film is blended successively using polyvinyl alcohol resin and other raw material components
It is swelled, extrudes, salivating, drying, being heat-treated, trimming and winding process forms water-resistant polyvinyl alcohol film.
The mass percent of the polyvinyl alcohol resin and other raw material components is as follows：Polyvinyl alcohol resin 30-60%, increasing
Agent 0-8%, surfactant 0.1-0.5% and water 39.9-64.5% are moulded, the wherein degree of polymerization of polyvinyl alcohol resin is 500-
2600, alcoholysis degree is more than 99%；Plasticizer be glycerine, propane diols, ethylene glycol, butanediol, diethylene glycol, triethylene glycol,
One or several kinds in PEG400-6000, triethanolamine, caprolactam；Surfactant is dodecyl sodium sulfate, fat
One or several kinds in alcohol, aliphatic acid, polyethylene glycol oxide ether, modified silicon oil.
Described mixing swell process is as follows：After each raw material components metering, stirred in the Hot mixer 1 heated with chuck
Mix mixing, the heating-up temperature of chuck constant temperature medium 2 is 80-95 DEG C, incorporation time is 10-240 minute, speed of agitator is 5-90 turns/
Point；When mixing terminal, after the polyvinyl alcohol resin granules swell of gained, volumetric expansion is into original 1-15 times, and outward appearance is resilient
The transparent g., jelly-like of adhesion, makes do not have free moisture between particle, and polyvinyl alcohol swellable particles are quickly transferred into cooling mixing
Room temperature is cooled in machine 6, it is closed stand-by.
Described expressing technique is as follows：Described polyvinyl alcohol swellable particles feeding band is vertically forced into the same of charging oar 8
To double screw extruder 7, parallel dual-screw extruding machine 7 removes vacuum tube with steam vent, the steam vent, in emptying state；In the same direction
The charge door temperature of double screw extruder 7 is set in 20-80 DEG C, and remaining each area's temperature is set in 80-105 DEG C.Parallel dual-screw
The flange in the exit of extruder 7 is connected with insulation feed pipe 13 with the charging aperture of single screw extrusion machine 15, this insulation feed pipe 13
It is upper that pressure sensor 12 is housed, pressure is set as 0.05-0.5MPa, and Stress control parallel dual-screw extruding machine 7 is set with this
Screw speed；The flange 20 in the exit of single screw extrusion machine 15 utilidor 21 is connected with casting die head 16.Parallel dual-screw
Be respectively arranged with the screen pack of 60-120 mesh on extruder and the flange in single screw extrusion machine exit, parallel dual-screw extruding machine plus
Material mouth temperature is set in 40-60 DEG C.
Described casting die head 16 possesses thermostatic control system, and its temperature is set in 75-100 DEG C, is set close to salivation roller 17
Put, salivation roller 17 drives mould release membrance 18 thereon to move, and the polyvinyl alcohol melt that casting die head 16 is extruded is coated on mould release membrance 18
On, subsequently into oven for drying, drying temperature is at 90-140 DEG C.One and stream are fixed on two end wallboards for salivating roller 17
The concentric gear wheel 25 with bearing of saliva roller, gear wheel 25 is engaged with little gear 26, is driven by the rotation of little gear 26 big
The rotation of gear 25, little gear 26 provides power by power set.
Casting die head 16 is arranged on can be in left and right and movable mounting seat 27, and the bottom surface of mounting seat 27, which is fixedly connected, leads
Rail 31, the guide rail 31 is arranged on two track bases 32 and can moved left and right relative to track base 32, and fulcrum bearing 28 is provided with use
The drive device 33 moved left and right in driving guide rail 31.Track base 32 is fixedly connected on the movable plate 34 that can be moved forward and backward, should
Movable plate 34 is movably connected in fulcrum bearing 28.Being formed on described gear wheel 25 makes fulcrum bearing 28, movable plate 34, mounting seat 27
The linkage board 29 interlocked with casting die head 16 with it, the rotation of gear wheel 25 drives fulcrum bearing 28, movable plate 34, the and of mounting seat 27
Casting die head 16 can be rotated relative to salivation roller 17.
The airtight cavity being internally formed for holding polyvinyl alcohol melt of casting die head 16；The lateral wall of casting die head 16
On be provided with the die lip mouth that formation is communicated with airtight cavity on an inlet communicated with airtight cavity 30, madial wall, it is described
Utilidor 21 is connected at inlet.
It is provided with to convex under two longitudinally disposed dovetail grooves 35, the bottom of movable plate 34 in fulcrum bearing 28 and is placed in dovetail groove
Sliding block 36 in 35.Two cylinders 37 for being used to drive movable plate 34 movable are installed in fulcrum bearing 28.
Equipped with the control assembly that casting die head 16 can be made to be mounted opposite the rotation of seat 27 in mounting seat 27, the control assembly includes
Worm gear 38 and the worm screw 39 used with worm gear, the outer end of worm screw 39 are equipped with adjusting handle 40；Mounting seat 27 includes bottom plate 41
With two side plates 42 installed in bottom plate side, the two ends of casting die head 16 are connected by rotating shaft 43 with side plate 42, worm gear 38
Connect in one of which rotating shaft 43.
Embodiment 1
1799 polyvinyl alcohol resin 100kg are taken, are put into the Hot mixer with 95 DEG C of chuck heating.Addition 70kg water,
0.2kg dodecyl sodium sulfates, are stirred 1 hour, the granule of polyvinyl alcohol being swelled with 5 revs/min of speed.
By the polyvinyl alcohol swellable particles mixed, it is quickly transferred in cooling mixing machine and is cooled to room temperature.After cooling
Polyvinyl alcohol swellable particles, are added into the loading hopper equipped with the double screw extruder for vertically forcing charging to starch.Twin-screw is squeezed
The specification for going out machine is diameter 45mm, draw ratio 40:Double screw extruder (the abbreviation Co rotating Twin Screw Extrusion of 1 combined threaded rod in the same direction
Machine), 7 sections of temperature controls, metering section sets opened type exhaust outlet, and in addition to feeding section temperature is set as 60 DEG C, remaining is disposed as 100
DEG C, 105 DEG C at outlet(discharge) flange, screen pack is respectively adopted that 60/100 mesh is double-deck, screw speed according to the pressure of insulation feed pipe from
Dynamic regulation, scope is 15-300 revs/min, machine cylinder pressure 1.6MPa, 100 DEG C of insulation feed pipe temperature control.Single screw extrusion machine
Screw diameter 60mm, does not wait deep Universal screw rod, draw ratio 25 equidistantly:1, each area's temperature setting is 95 DEG C, and screw speed is according to stream
Saliva roller speed Auto-matching, 40-60 revs/min of scope, screen pack sets 60/120 mesh double-deck respectively, utilidor temperature setting
For 85 DEG C.80 DEG C of casting die head temperature control, melt is salivated on PET mould release membrances, the drying and forming-film in 100-120 DEG C of baking oven, through 150
DEG C 2 minutes it is heat-treated, obtains thickness 0.04mm film.
The film is used to manufacture water-soluble poval protection discarded object storage hermetic bag, can store discarded containing water
Thing, can sealing without leakage, maximum hydrostatic pressing 500mm water columns can be born, wet strength reaches 10MPa, and in after-treatment device
All dissolvings.
Embodiment 2
1799 polyethylene 100kg are taken, are put into the Hot mixer with 90 DEG C of chuck heating.Add 200kg water, 15kg third
Triol, 1.5kg polyoxyethylene lauryl ethers, are stirred 0.5 hour with 90 revs/min of speed, cool to 80 DEG C of continuation stirrings 3 small
When, the granule of polyvinyl alcohol being swelled.
By the polyvinyl alcohol swellable particles mixed, it is quickly transferred in cooling mixing machine and is cooled to room temperature.After cooling
Polyvinyl alcohol swellable particles, are added into equipped with the double screw extruder loading hopper for vertically forcing charging to starch.Twin-screw extrusion
Machine specification is diameter 45mm, draw ratio 40:The double screw extruder of 1 combined threaded rod in the same direction, 7 sections of temperature controls, metering section sets open
Formula exhaust outlet, in addition to feeding section temperature is set as 40 DEG C, remaining is disposed as 85 DEG C, 90 DEG C at outlet(discharge) flange, screen pack difference
Double-deck using 60/100 mesh, screw speed is automatically adjusted according to the pressure of insulation feed pipe, 25-500 revs/min of scope, machine barrel
Interior pressure 0.9MPa, 85 DEG C of insulation feed pipe temperature control.Single screw extrusion machine screw diameter 60mm, does not wait deep Universal screw rod equidistantly,
Draw ratio 25:1, each area's temperature setting is 80 DEG C, and screw speed is according to salivation roller speed Auto-matching, 60-90 revs/min of scope
Clock, screen pack sets 60/120 mesh double-deck respectively, and utilidor temperature setting is 75 DEG C.T-shaped 70 DEG C of casting die head temperature control, melt
Salivation is on PET mould release membrances, the drying and forming-film in 100-140 DEG C of baking oven, is heat-treated within 0.5 minute through 150 DEG C, obtains thickness
0.025mm film.
The film is used to manufacture the film layer in water-soluble poval multilayer materials, for manufacturing medical application
Protective garment, can not leaked harmful levels of pathogens barrier, composite can bear maximum hydrostatic pressing 1000mm water columns, can reach
The wet microorganism barrier standard requirements of EN22610, and all dissolved in after-treatment device, Quick Oxidation is decomposed.
Embodiment 3
1799 polyethylene 100kg are taken, are put into the Hot mixer with 90 DEG C of chuck heating.90kg water, 0.4kg is added to gather
Oxygen ethene lauryl ether, 10kg butanediols are stirred 2 hours, the granule of polyvinyl alcohol being swelled with 20 revs/min of speed.
By the polyvinyl alcohol swellable particles mixed, it is quickly transferred in cooling mixing machine and is cooled to room temperature.After cooling
Polyvinyl alcohol swellable particles, are added into equipped with the double screw extruder loading hopper for vertically forcing charging to starch.Twin-screw extrusion
Machine specification is diameter 45mm, draw ratio 40:The double screw extruder of 1 combined threaded rod in the same direction, 7 sections of temperature controls, metering section sets open
Formula exhaust outlet, in addition to feeding section temperature is set as 50 DEG C, remaining is disposed as 95 DEG C, 100 DEG C at outlet(discharge) flange, screen pack difference
Double-deck using 60/100 mesh, screw speed is automatically adjusted according to the pressure of insulation feed pipe, 15-30 revs/min of scope, in machine barrel
Pressure 1.2MPa, 95 DEG C of insulation feed pipe temperature control.Single screw extrusion machine screw diameter 65mm, does not wait deep Universal screw rod equidistantly, long
Compare 25 in footpath:1, each area's temperature setting be 90 DEG C, screw speed according to salivation roller speed Auto-matching, 40-60 revs/min of scope,
Screen pack sets 60/120 mesh double-deck respectively, and utilidor temperature setting is 85 DEG C.T-shaped 80 DEG C of casting die head temperature control, melt flow
Saliva is on PET mould release membrances, the drying and forming-film in 100-120 DEG C of baking oven, is heat-treated within 2 minutes through 150 DEG C, obtains thickness 0.04mm's
Film.
The film is used to be combined with polyvinyl alcohol nonwovens, and matting materials are made, for the disposable ground paving of nuclear industry
Pad, can keep ground to dry and not leak, can bear maximum hydrostatic pressing 500mm water columns, and all dissolved in after-treatment device.
The above described is only a preferred embodiment of the present invention, not making any formal to the structure of the present invention
Limitation.Any simple modification, equivalent variations and modification that every technical spirit according to the present invention is made to above example,
Fall within the scope of protection of the present invention.
Claims (9)
1. a kind of production technology of water-resistant polyvinyl alcohol film, it uses polyvinyl alcohol resin and other raw material components to pass through successively
Mixing is swelled, extruded, salivating, drying, being heat-treated, trimming and winding process form water-resistant polyvinyl alcohol film；
The mass percent of the polyvinyl alcohol resin and other raw material components is as follows：Polyvinyl alcohol resin 30-60%, plasticizer
0-8%, surfactant 0.1-0.5% and water 39.9-64.5%, the wherein degree of polymerization of polyvinyl alcohol resin are 500-2600, alcohol
Xie Du is more than 99%；Plasticizer is glycerine, propane diols, ethylene glycol, butanediol, diethylene glycol, triethylene glycol, PEG400-
6000th, the one or several kinds in triethanolamine, caprolactam；Surfactant is dodecyl sodium sulfate, fatty alcohol, fat
One or several kinds in acid, polyethylene glycol oxide ether, modified silicon oil；
Described mixing swell process is as follows：After each raw material components metering, stirred in the Hot mixer (1) heated with chuck
Mixing, chuck constant temperature medium (2) heating-up temperature is 80-95 DEG C, and incorporation time is 10-240 minute, speed of agitator be 5-90 turn/
Point；When mixing terminal, the polyvinyl alcohol resin granules swell of gained, volumetric expansion is into original 1-15 times, and outward appearance is resilient not
The transparent g., jelly-like of adhesion, makes do not have free moisture between particle, polyvinyl alcohol swellable particles is quickly transferred into cooling mixing machine
(6) room temperature is cooled in, it is closed stand-by；
Described expressing technique is as follows：Described polyvinyl alcohol swellable particles feeding band is vertically forced into the in the same direction of charging oar (8)
Double screw extruder (7), parallel dual-screw extruding machine (7) band steam vent, steam vent removes vacuum tube, in emptying state；Together
20-80 DEG C is set in the charge door temperature of double screw extruder (7), remaining each area's temperature is set in 80-105 DEG C；
The flange in parallel dual-screw extruding machine (7) exit one insulation feed pipe (13) and a single screw extrusion machine (15)
Charging aperture be connected, pressure sensor (12) is housed in this insulation feed pipe (13), pressure is set as 0.05-0.5MPa, with this
Set the screw speed of Stress control parallel dual-screw extruding machine (7)；The flange in single screw extrusion machine (15) exit
(20) it is connected with a utilidor (21) with a casting die head (16).
2. the production technology of water-resistant polyvinyl alcohol film according to claim 1, it is characterised in that described salivation mould
Head (16) possesses thermostatic control system, and its temperature is set in 75-100 DEG C, is set close to a salivation roller (17), salivates roller (17) band
Dynamic mould release membrance (18) thereon is mobile, and the polyvinyl alcohol melt of casting die head (16) extrusion is coated on mould release membrance (18), then
Into oven for drying, drying temperature is at 90-140 DEG C.
3. the production technology of water-resistant polyvinyl alcohol film according to claim 2, it is characterised in that the salivation roller
(17) fixed at least one end wallboard one with salivation the concentric gear wheel (25) with bearing of roller, gear wheel (25) with
One little gear (26) is engaged, and the rotation of gear wheel (25) is driven by the rotation of little gear (26)；
Described casting die head (16) is arranged on one can be in left and right and movable mounting seat (27), under the mounting seat (27)
Side is provided with a fulcrum bearing (28)；A fulcrum bearing (28), mounting seat (27) and casting die head are formed on described gear wheel (25)
(16) linkage board (29) interlocked with it, the rotation of gear wheel (25) drives fulcrum bearing (28), mounting seat (27) and casting die head
(16) it can be rotated relative to salivation roller (17)；
Being internally formed for the casting die head (16) one is used to hold the airtight cavity of polyvinyl alcohol melt；The casting die head
(16) mould that formation is communicated with airtight cavity on an inlet communicated with airtight cavity (30), madial wall is provided with lateral wall
Utilidor (21) is connected at lip, described inlet.
4. the production technology of water-resistant polyvinyl alcohol film according to claim 3, it is characterised in that the mounting seat
(27) bottom surface is fixedly connected with a guide rail (31), and the guide rail (31) is arranged on multiple track bases (32) and can be relative to track base
(32) move left and right, described fulcrum bearing (28) is used to drive the drive device (33) that guide rail (31) is moved left and right provided with one.
5. the production technology of water-resistant polyvinyl alcohol film according to claim 4, it is characterised in that described track base
(32) it is fixedly connected on a movable plate that can be moved forward and backward (34), the movable plate (34) is movably connected in fulcrum bearing (28).
6. the production technology of water-resistant polyvinyl alcohol film according to claim 5, it is characterised in that described fulcrum bearing
(28) it is provided with to convex under at least one longitudinally disposed dovetail groove (35), the bottom of the movable plate (34) on and is placed in dovetail groove
(35) sliding block (36) in.
7. the production technology of water-resistant polyvinyl alcohol film according to claim 6, it is characterised in that described fulcrum bearing
(28) at least one cylinder (37) for being used to drive movable plate (34) movable is installed on.
8. the production technology of water-resistant polyvinyl alcohol film according to claim 3, it is characterised in that described mounting seat
(27) equipped with one casting die head (16) can be made to be mounted opposite the control assembly that seat (27) is rotated on, described control assembly includes snail
Wheel (38) and the worm screw (39) used with worm gear, the outer end of the worm screw (39) are equipped with adjusting handle (40)；Described peace
Filling seat (27) includes bottom plate (41) and two side plates (42) installed in bottom plate side, and the two ends of the casting die head (16) lead to
Cross a rotating shaft (43) to be connected with side plate (42), in described worm gear (38) connection one of which rotating shaft (43).
9. the production technology of water-resistant polyvinyl alcohol film according to claim 1, it is characterised in that the in the same direction pair of spiral shell
The screen pack of 60-120 mesh is respectively arranged with bar extruder and the flange in single screw extrusion machine exit, parallel dual-screw extruding machine
Charge door temperature is set in 40-60 DEG C.
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| CN106280155B (en) * | 2016-08-08 | 2018-10-26 | 佛山市可达佳建材有限公司 | The preparation method and waterproof roll of water-soluble film on waterproof roll, water-soluble film are overlay applied to wet-laying |
| CN106700362A (en) * | 2017-01-18 | 2017-05-24 | 彭先彧 | Polyvinyl alcohol full-biodegradation film having water resistance and preparation method thereof |
| CN107286543B (en) * | 2017-05-27 | 2021-03-19 | 中国石油化工集团公司 | Polyvinyl alcohol optical film and preparation method thereof |
| CN109233162B (en) * | 2018-08-27 | 2021-04-20 | 江西中聚宏新材料科技有限公司 | Environment-friendly degradable composite film for packaging and preparation method thereof |
| CN110813656B (en) * | 2019-11-12 | 2021-03-02 | 徐州国贸新材料股份有限公司 | Extrusion molding device is used in processing of coated fabric |
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| WO2010057143A1 (en) * | 2008-11-17 | 2010-05-20 | Global Resources International, Inc. | Water-soluble multi-layer materials, articles made therefrom and methods of making and using the same |
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