CN106589723A - Middle-temperature water-soluble film, preparing method and refined filtration equipment - Google Patents
Middle-temperature water-soluble film, preparing method and refined filtration equipment Download PDFInfo
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- CN106589723A CN106589723A CN201611068499.5A CN201611068499A CN106589723A CN 106589723 A CN106589723 A CN 106589723A CN 201611068499 A CN201611068499 A CN 201611068499A CN 106589723 A CN106589723 A CN 106589723A
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L29/00—Compositions of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by an alcohol, ether, aldehydo, ketonic, acetal or ketal radical; Compositions of hydrolysed polymers of esters of unsaturated alcohols with saturated carboxylic acids; Compositions of derivatives of such polymers
- C08L29/02—Homopolymers or copolymers of unsaturated alcohols
- C08L29/04—Polyvinyl alcohol; Partially hydrolysed homopolymers or copolymers of esters of unsaturated alcohols with saturated carboxylic acids
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D29/00—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor
- B01D29/01—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor with flat filtering elements
- B01D29/05—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor with flat filtering elements supported
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D29/00—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor
- B01D29/50—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor with multiple filtering elements, characterised by their mutual disposition
- B01D29/56—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor with multiple filtering elements, characterised by their mutual disposition in series connection
- B01D29/58—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor with multiple filtering elements, characterised by their mutual disposition in series connection arranged concentrically or coaxially
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D29/00—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor
- B01D29/60—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor integrally combined with devices for controlling the filtration
- B01D29/601—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor integrally combined with devices for controlling the filtration by clearness or turbidity measuring
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D29/00—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor
- B01D29/62—Regenerating the filter material in the filter
- B01D29/66—Regenerating the filter material in the filter by flushing, e.g. counter-current air-bumps
- B01D29/68—Regenerating the filter material in the filter by flushing, e.g. counter-current air-bumps with backwash arms, shoes or nozzles
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J5/00—Manufacture of articles or shaped materials containing macromolecular substances
- C08J5/18—Manufacture of films or sheets
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J2329/00—Characterised by the use of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by an alcohol, ether, aldehydo, ketonic, acetal, or ketal radical; Hydrolysed polymers of esters of unsaturated alcohols with saturated carboxylic acids; Derivatives of such polymer
- C08J2329/02—Homopolymers or copolymers of unsaturated alcohols
- C08J2329/04—Polyvinyl alcohol; Partially hydrolysed homopolymers or copolymers of esters of unsaturated alcohols with saturated carboxylic acids
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J2471/00—Characterised by the use of polyethers obtained by reactions forming an ether link in the main chain; Derivatives of such polymers
- C08J2471/02—Polyalkylene oxides
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2203/00—Applications
- C08L2203/16—Applications used for films
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- Health & Medical Sciences (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
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Abstract
The invention provides a middle-temperature water-soluble film, a preparing method and refined equipment, and relates to the technical field of plastic films. The middle-temperature water-soluble film is prepared from 10-20% of polyving akohol PVA1799 solid content, 15-20% of plasticizer, 1-2% of surface active agent, 0.3-1% of cross-linking agent, 0.1-0.5% of antifoaming agent and 65-75% of solvent water. Compared with an ordinary water-soluble film, the middle-temperature water-soluble film has the advantages of being high in transparency, good in homogeneity and high in softness. In addition, the manufacturing technology of the middle-temperature water-soluble film is simple, and the middle-temperature water-soluble film can be used in the making of artificial limbs and marbles, and is especially applicable to a humid environment in marine transportation of goods for long distance. And the middle-temperature water-soluble film can be totally degraded into nontoxic and harmless water and carbon dioxide in a later period, is an environmentally friendly type packing material which is convenient to use, and has a broad application prospect.
Description
Technical field
The present invention relates to masking technique field, more particularly to a kind of middle temperature water soluble film, preparation method and fine straining equipment.
Background technology
At present, with the development and the raising of living standards of the people of market economy, various plastics are at us
Life and production in be seen everywhere, play vital effect.In recent years, for the requirement to environmental conservation, in society
Advocating energetically uses the appearance of degradable membrane, degradable membrane greatly to solve the problems, such as environmental pollution, uses in productive life
Plastic foil gradually by degradable membrane replace.
Nowadays, the market space of water soluble film is even more wide, and which voluntarily can be dissolved in water, at present existing water soluble film
Have that transparency is low, the shortcoming of lack of homogeneity, and production complex process, the characteristic not with correspondence different temperatures dissolving,
Simultaneously can not be degradable in degradation process, the impurity of partial contamination environment is left, thus it is extensive not yet in various fields
Using.
The content of the invention
The technical problem to be solved in the present invention is for above-mentioned the deficiencies in the prior art, there is provided a kind of middle temperature water soluble film, its
Component proportion, mass percent：
1799 solid content 10-18% of PVAC polyvinylalcohol；
Plasticizer glycerol 3-6%, ethylene glycol 4-8%, Polyethylene Glycol 3-6%；
Surfactant 1-2%；
Cross-linking agent 0.3-1%；
Aqueous solvent 65-75%；
Defoamer 0.1-0.5%；
According to formulation ratio, Jing solvent water dissolutioies, stir, initial filter, adjustment viscosity, fine straining, deaeration, drying and moulding are made
's.
The middle temperature is 65 °C of temperature.
Preferably, surfactant be sodium lauryl sulphate, dodecylbenzene sodium sulfonate, the one kind in glycerin ether or
Person is several.
Preferably, defoamer is tween, capryl alcohol, polysiloxane emulsion, one or several in tributyl phosphate.
A kind of preparation method of middle temperature water soluble film, specifically includes following steps：
Step S100：According to formulation ratio, with add after aqueous solvent polyethylene dissolving alcohol PVA1799 plasticizer, surfactant,
Defoamer, is put in mixing tank, stirs；
Step S200：Stir fine and smooth and during without range estimation bulky grain to feed liquid, be warming up to feed temperature insulation up to after design temperature high
Speed stirring made material fully dissolve dispersion not less than one hour；
Step S300：Initial filter, makes particle diameter adjust between 60-100 mesh；
Step S400：Adjustment viscosity, under the conditions of uniform temperature, makes viscosity number be adjusted to the 70-100 seconds.
Step S500：Fine straining, using fine straining equipment, makes particle diameter adjust to more than 150 mesh；
Step S600：Serosity is obtained after feed liquid is carried out deaeration process standby；
Step S700：Feed liquid is cast to into drying and moulding on roller or steel band casting apparatus, the thickness for controlling film is received for 20-60 μm
Volume, completes masking.
Preferably, the initial filter in step S300, using initial filter equipment, the initial filter equipment is included equipped with two He of charging aperture
The tank body two of discharging opening two, the sieve plate two being arranged inside tank body two and filter screen two, after feed liquid enters tank body two, by sieve plate two
And particle diameter is adjusted between 70-90 mesh.
Preferably, the adjustment viscosity in step S400, in temperature 75-85 °C, viscosity number is adjusted to adjusts viscosity number
It is whole for the 75-95 seconds.
Preferably, the fine straining in step S500, makes particle diameter adjust to more than 200 mesh after filtering using fine straining equipment.
Fine straining equipment used by a kind of preparation method of middle temperature water soluble film, it is characterised in that include with charging aperture and go out
The tank body of material mouth, screen cloth, counter-flushing pipeline, detection means and connection tank body upper and lower ends and the return duct positioned at tank body sidepiece,
Tank body for up and down in cone, middle part be in cylindrical shape hollow structure, charging aperture is arranged at tank body lower end center and front end sets
Have force (forcing) pump, discharging opening is arranged at tank body upper end center, return duct two ends respectively with detection means end and pressue device before
End is connected, and screen cloth is located at tank interior.
Preferably, screen cloth includes that filter screen, two or more are located at the upper and lower both sides of filter screen and the sieve being fastened together with filter screen
Plate.
Preferably, aperture of filter screen is more than 200 mesh, hole diameter of sieve (perforated) plate is 8-10mm, and filter screen and sieve plate are stainless using 304
Steel matter.
Using the beneficial effect produced by above-mentioned technical proposal it is：The product of the present invention is compared general water soluble film and is had
The characteristics of transparency is high, uniformity is good, pliability is high, production process is simple can be used for pesticide, embroidery, cement additire
Deng packaging, not only drastically increase the convenience that product is used, and the later stage thoroughly can be degraded to nontoxic water and
Carbon dioxide, is a kind of packaging material of environmental protection, has broad application prospects.
Description of the drawings
Fig. 1 is the sectional view of the initial filter equipment of the embodiment of the present invention.
Fig. 2 is the structural scheme of mechanism of the fine straining equipment of the embodiment of the present invention.
Fig. 3 is the structural representation of screen cloth in Fig. 2.
In figure：1st, tank body；11st, charging aperture；12nd, discharging opening；13rd, pressue device；2nd, screen cloth；21st, filter screen；22nd, sieve plate；
3rd, counter-flushing pipeline；4th, detection means；5th, return duct；6th, tank body two；71st, sieve plate two；72nd, filter screen two.
Specific embodiment
With reference to specific embodiment, the present invention is further detailed explanation.
A kind of middle temperature water soluble film and preparation method thereof, it is characterised in that according to mass percent, including：
1799 solid content 10-18% of PVAC polyvinylalcohol；
Plasticizer glycerol 3-6%, ethylene glycol 4-8%, Polyethylene Glycol 3-6%；
Cross-linking agent 0.3-1%；
Surfactant (1-2%)；
Aqueous solvent 65-75%；
Defoamer 0.1-0.5%.
The mass percent sum of described PVAC polyvinylalcohol 1799, plasticizer, surfactant, solvent and defoamer
For 100%.
Preferably, surfactant is sodium lauryl sulphate, dodecylbenzene sodium sulfonate, one kind of glycerin ether or appoints
Anticipate several mixture.
Preferably, defoamer is tween, capryl alcohol, polysiloxane emulsion, one or several in tributyl phosphate.
A kind of preparation method of middle temperature water soluble film, specifically includes following steps：
Step S100：At ambient temperature, with 50-70 rev/min of speed stirring aqueous solvent, while being slowly added to polyvinyl alcohol
PVA1799, is sufficiently stirred for after charging after caking is completely dispersed, then is warmed to 50-60 DEG C, the slow-speed of revolution soak about 60 minutes after raw material
Can be completely dissolved.Cross-linking agent, plasticizer, surfactant, defoamer are subsequently adding, in order to avoid bubble is produced in course of dissolution
Foam, can add the defoamer % such as tween, capryl alcohol, polysiloxane emulsion, tributyl phosphate.The storage of aqueous solution adopts 304 rustless steel devices
Ware is stored.Features putamina is added to starch Polymer material to change its performance.
Step S200：Stir fine and smooth and during without range estimation bulky grain to feed liquid, be warming up to 95 DEG C of feed temperature, in rotating speed 50-
Under 70 revs/min of speed, insulated and stirred is not less than one hour, makes material fully dissolve dispersion, it is ensured that will not be because of material in feed liquid
Stir uneven and form big particle diameter impurity.
Step S300：Initial filter, makes particle diameter adjust between 60-100 mesh；
Step S400：Adjustment viscosity, under the conditions of uniform temperature, makes viscosity number be adjusted to the 70-100 seconds.
Step S500：Fine straining, using fine straining equipment, makes particle diameter adjust to more than 150 mesh；
Step S600：Serosity is obtained after feed liquid is carried out deaeration process standby.Due to have passed through above-mentioned initial filter, adjustment viscosity and essence
The process of filter, may proceed to generate more micro-bubble in feed liquid, if do not processed the bubble of the part, by serious shadow
Ring later product performance and apparent mass, so deaeration process is again carried out to feed liquid by the step, it is ensured that feed liquid into
Remove the bubble contained by inside before type to greatest extent, be that follow-up flow casting molding is ready.
Step S700：Feed liquid is cast to into drying and moulding or post processing on roller or steel band casting apparatus, the thickness of film is controlled
Spend and wind for 20-60 μm, complete masking.In the film forming procedure of feed liquid, according to the molding parameter for needing adjustment equipment of client,
To obtain the water soluble film of suitable thickness.
Preferably, the initial filter in step S300, using initial filter equipment, the initial filter equipment is included equipped with charging aperture 2 61
Tank body 26, the sieve plate 2 71 being arranged inside tank body 26 and filter screen 2 72 with discharging opening 2 62, feed liquid enter tank body 26
Afterwards, after the filtration of sieve plate 2 71 and filter screen 2 72 particle diameter is made to adjust between 70-90 mesh.Using initial filter equipment, using sieve
Feed liquid is filtered by plate 2 71 and filter screen 2 72 in its natural state, to obtain the feed liquid between particle diameter 70-90 mesh, tentatively
The impurity in feed liquid is filtered off, the purity of feed liquid is improved.
Preferably, the adjustment viscosity in step S400, in temperature 75-85 °C, viscosity number is adjusted to adjusts viscosity number
It is whole for the 75-95 seconds.Viscosity adjustment is, under the conditions of 75-85 °C of slurry temperature, to add appropriate hot water to be adjusted, desired viscosity
For the 70-95 seconds.
Preferably, the fine straining in step S500, after filtering using fine straining equipment, makes particle diameter adjust between 70-90 mesh.
Using fine straining equipment, pressue device 13 is coordinated to use using sieve plate 22 and filter screen 21, the said equipment is under pressurised conditions by feed liquid
Filter, the particle diameter of feed liquid can be adjusted to more than 200 mesh in the presence of sieve plate 22 and filter screen 21, the cooperation of pressue device 13
Using the filter effect for further increasing feed liquid, it is easy to feed liquid preferably to carry out the filtration of profound level under pressurised conditions, is
The quality of later product is provided and is ensured well.
A kind of fine straining device structure used by preparation method of middle temperature water soluble film is：Including with charging aperture 11 and discharging opening
12 tank body 1, screen cloth 2, counter-flushing pipeline 3, detection means 4 and connection 1 upper and lower ends of tank body and the backflow positioned at 1 sidepiece of tank body
Pipe 5, tank body 1 for up and down in cone, middle part be in cylindrical shape hollow structure, charging aperture 11 be arranged at 1 lower end center of tank body,
And front end is provided with pressue device 13, discharging opening 12 is arranged at 1 upper end center of tank body, 5 two ends of return duct respectively with detection means 4
End is connected with 13 front end of pressue device, and screen cloth 2 is located inside tank body 1.Tank body 1 is using mediate cylindrical two ends cone
Hollow form, the version can avoid feed liquid that excessive bubble is formed during turnover, and then affect later stage degradation film
Apparent mass, it is to avoid excessive minute bubbles are formed in film.The setting of return duct 5 can make feed liquid Jing after filtering through screen cloth 2
Cross detection means 4 to detect the particle diameter and impurity content of feed liquid, if not reaching corresponding quality standard, by backflow
Pipe 5 is delivered at charging aperture 11 again, is sent in tank body 1, and then realize the mistake again of feed liquid after the pressurization of force (forcing) pump 13
Filter, to reach the making for being used for later stage degradation film product after due quality standard.Counter-flushing pipeline 3 is in high viscosity liquid
Filter using carrying out reverse knot screen after a period of time, due to big after high-viscosity liquid filter operation a period of time
Particle diameter impurity is accumulated in 2 lower surface of screen cloth, affects the speed of service of the feed liquid in tank body 1, while the also pressure to pressue device 13
Force value requires further to increase, and to avoid energy waste and improving work efficiency, needs to recoil the screen cloth 2 in tank body 1
Washout is miscellaneous, and the medium that dedoping step is adopted is for vapourss.From screen cloth 2, relative feed liquid flow direction is reverse under pressure for vapourss
Pass through, the impurity of screen cloth 2 is removed, impurity is dropped down onto 1 bottom of tank body in the form of liquid mixture and discharged, until the heat for excluding
Steam is pure vapourss, that is, complete scale removal process.
Preferably, screen cloth 2 includes that filter screen 21, two or more is located at filter screen and both sides and is tightened to one with filter screen 21 about 21
The sieve plate 22 of body.Screen cloth 2 include with certain rigid sieve plate 22 and and the filter screen 21 with filter effect, sieve plate 22 arranged altogether
For two-layer, respectively positioned at the top and bottom of whole screen cloth 2, it is to avoid feed liquid filter and backwash process in feed liquid or remove impurity medium
Excessive pressure is formed to screen cloth 2 causes sieve plate 2 to deform, and the filter screen being arranged between upper and lower two pieces of sieve plates 22 then effectively can go
Except the impurity in feed liquid.
Further, 21 aperture of filter screen is more than 200 mesh, and 22 aperture of the sieve plate is 8-10mm, filter screen 21 and sieve plate 22
304 stainless steels are adopted.For filter screen 21 and sieve plate 22, the material of corrosion resistance should be typically adopted, it is to avoid sieve plate 2 is being grown
Other impurities are produced in phase filter process, feed liquid quality is impacted, the two adopts 304 stainless steels, the material
From ensure that feed liquid will not touch more impurity, it is to avoid affect product quality, filter screen, can using apertures more than 200 mesh
Effectively to ensure the filtering accuracy of feed liquid, it is to avoid the defect of the degradative membrane product apparent mass that Impurity removal is not thoroughly caused.
Sieve plate 22 has certain rigidity, respectively positioned at the top and bottom of whole screen cloth 2, it is to avoid feed liquid is filtered expects with backwash process
Liquid or remove impurity medium form excessive pressure to screen cloth 2 and cause sieve plate 2 to deform, and the occupation mode that filter screen 21 and sieve plate 22 combine can
Both there is less aperture with rigidity to realize that sieve plate 2 is overall, and can effectively remove the impurity in feed liquid.
Embodiment：
This middle temperature water soluble film according to mass percent, including：PVAC polyvinylalcohol 1799：15%, glycerol：4%, ethylene glycol：6%,
Polyethylene Glycol：5%, dodecylbenzene sodium sulfonate：1.5%, tributyl phosphate 0.3%, cross-linking agent 0.2%；Aqueous solvent is 68%.
Preparation method：At ambient temperature, with 50-70 rev/min of speed stirring aqueous solvent, while being slowly added to polyethylene
Alcohol PVA1799, is sufficiently stirred for after charging after caking is completely dispersed, then is warmed to 50-60 DEG C, and the slow-speed of revolution is former after soaking about 60 minutes
Material can be completely dissolved.Cross-linking agent, plasticizer, surfactant, defoamer are subsequently adding, in order to avoid producing in course of dissolution
Foam, can add the defoamer % such as tween, capryl alcohol, polysiloxane emulsion, tributyl phosphate.The storage of aqueous solution adopts 304 rustless steels
Vessel are stored.Features putamina is added to starch Polymer material to change its performance.Stir to feed liquid exquisiteness and nothing
During range estimation bulky grain, 95 DEG C of feed temperature is warming up to, under the speed of 50-70 rev/min of rotating speed, insulated and stirred is little not less than one
When, make material fully dissolve dispersion, it is ensured that in feed liquid, big particle diameter impurity will not be formed because material stirring is uneven.Feed liquid is in froth breaking
Bubble removing is removed in the presence of agent tentatively, into initial filter operation, using sieve plate 2 71 and filter screen 2 72 in its natural state to feed liquid
Tentatively filtered, gone the removal of impurity, obtained feed liquid of the particle diameter in 80 mesh or so, then under the conditions of 80 °C of temperature, added appropriate
Hot water be adjusted, obtain the feed liquid that viscosity is 85 seconds, and then carry out fine straining, under pressurised conditions feed liquid is filtered, sieve
The particle diameter of feed liquid can be adjusted between 200-220 mesh in the presence of plate 22 and filter screen 21, then carry out deaeration process again
It is the water soluble film of 60 μm of thickness that feed liquid afterwards can be cast to drying and moulding on roller or steel band casting apparatus, is then received
Volume, completes masking.
When water temperature is 65 DEG C, it is 130-150 times for being completely dissolved of 60 μm of water soluble film that thickness is to the middle temperature water soluble film
Second.
The product of the present invention is compared general water soluble film and has the characteristics of transparency is high, uniformity is good, pliability is high, and produces
Product processing technology is simple, during can be used for artificial limb making and marble making, is particularly suited for remote marine transportation thing
Wet environment during product, and the later stage can thoroughly be degraded to nontoxic water and carbon dioxide, be a kind of ring easy to use
Guarantor's type packaging material, have broad application prospects.
Claims (10)
1. a kind of middle temperature water soluble film, it is characterised in that its component proportion, mass percent：
1799 solid content 10-18% of PVAC polyvinylalcohol；
Plasticizer：Glycerol 3-6%, ethylene glycol 4-8%, Polyethylene Glycol 3-6%；
Surfactant 1-2%；
Cross-linking agent 0.3-1%；
Aqueous solvent 65-75%；
Defoamer 0.1-0.5%；
According to formulation ratio, Jing solvent water dissolutioies, stir, initial filter, adjustment viscosity, fine straining, deaeration, drying and moulding are made
's.
2. the middle temperature water soluble film of one kind according to claim 1, it is characterised in that the surfactant is dodecyl sulfur
One or several in sour sodium, dodecylbenzene sodium sulfonate, glycerin ether.
3. the middle temperature water soluble film of one kind according to claim 1, it is characterised in that the defoamer is tween, capryl alcohol, organic
One or several in silicon Emulsion, tributyl phosphate.
4. the preparation method of a kind of middle temperature water soluble film according to any one of claim 1-3, it is characterised in that specifically include
Following steps：
Step S100：According to formulation ratio, with add after aqueous solvent polyethylene dissolving alcohol PVA1799 plasticizer, surfactant,
Cross-linking agent, defoamer, are put in mixing tank, stir；
Step S200：Stir fine and smooth and during without range estimation bulky grain to feed liquid, be warming up to feed temperature insulation up to after design temperature high
Speed stirring made material fully dissolve dispersion not less than one hour；
Step S300：Initial filter, makes particle diameter adjust between 60-100 mesh；
Step S400：Adjustment viscosity, under the conditions of uniform temperature, makes viscosity number be adjusted to the 70-100 seconds；
Step S500：Fine straining, using fine straining equipment, makes particle diameter adjust to more than 150 mesh；
Step S600：Serosity is obtained after feed liquid is carried out deaeration process standby；
Step S700：Feed liquid is cast to into drying and moulding on roller or steel band casting apparatus, the thickness for controlling film is received for 20-60 μm
Volume, completes masking.
5. the preparation method of a kind of middle temperature water soluble film according to claim 4, it is characterised in that in step S300
Initial filter, using initial filter equipment, the initial filter equipment is included equipped with charging aperture two（61）With discharging opening two（62）Tank body two（6）、
It is arranged at tank body two（6）Internal sieve plate two（71）With filter screen two（72）, feed liquid is into tank body two（6）Afterwards, by sieve plate two
（71）With filter screen two（72）Filtration after particle diameter is adjusted between 70-90 mesh.
6. the preparation method of a kind of middle temperature water soluble film according to claim 4, it is characterised in that in step S400
Adjustment viscosity, in temperature 75-85 °C, viscosity number is adjusted to makes viscosity number be adjusted to the 75-95 seconds.
7. the preparation method of a kind of middle temperature water soluble film according to claim 4, it is characterised in that in step S500
Fine straining, makes particle diameter adjust to more than 200 mesh after filtering using fine straining equipment.
8. the fine straining equipment used by a kind of preparation method of middle temperature water soluble film according to claim 4, it is characterised in that institute
Fine straining device structure is：Including with charging aperture（11）And discharging opening（12）Tank body（1）, screen cloth（2）, counter-flushing pipeline
（3）, detection means（4）With connection tank body（1）Upper and lower ends and be located at tank body（1）The return duct of sidepiece（5）, the tank body（1）
For up and down in cone, middle part be in cylindrical shape hollow structure, the charging aperture（11）It is arranged at tank body（1）Lower end center,
And front end is provided with force (forcing) pump（13）, the discharging opening（12）It is arranged at tank body（1）At upper end center, the return duct（5）Two ends
Respectively with detection means（4）End and pressue device（13）Front end is connected, the screen cloth（2）Positioned at tank body（1）It is internal.
9. fine straining equipment according to claim 8, it is characterised in that the screen cloth（2）Including filter screen（21）, two or more
Positioned at filter screen（21）Upper and lower both sides and and filter screen（21）The sieve plate being fastened together（22）.
10. fine straining equipment according to claim 9, it is characterised in that the filter screen（21）Aperture be 200 mesh more than, institute
State sieve plate（22）Aperture is 8-10mm, the filter screen（21）And sieve plate（22）304 stainless steels are adopted.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611068499.5A CN106589723B (en) | 2016-11-29 | 2016-11-29 | A essence filtration equipment for filtering feed liquid of medium temperature water-soluble membrane |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
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| CN109796796A (en) * | 2019-01-25 | 2019-05-24 | 中国工程物理研究院材料研究所 | A kind of low-temperature water-soluble close membrane and its preparation and application |
| CN119019798A (en) * | 2024-08-27 | 2024-11-26 | 广州凡岛网络科技有限公司 | A modified polyvinyl alcohol water-soluble film with anti-redeposition and preparation method thereof |
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| CN119019798A (en) * | 2024-08-27 | 2024-11-26 | 广州凡岛网络科技有限公司 | A modified polyvinyl alcohol water-soluble film with anti-redeposition and preparation method thereof |
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| CN106589723B (en) | 2020-08-21 |
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