CN103481626A - Production technology of polyvinyl chloride (PVC)/polyethylene (PE)/polyvinyl dichloride (PVDC) composite piece - Google Patents
Production technology of polyvinyl chloride (PVC)/polyethylene (PE)/polyvinyl dichloride (PVDC) composite piece Download PDFInfo
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Abstract
The invention relates to a production technology of a polyvinyl chloride (PVC)/polyethylene (PE)/polyvinyl dichloride (PVDC) composite piece. The technology comprises the steps of unwinding a hard PVC piece, coating an adhesive for a first time, unwinding a PE film, compounding PVC/ PE, cooling a PVC/ PE composite piece, winding, curing, unwinding the PVC/ PE composite piece, trimming, carrying out corona treatment, coating the adhesive for a second time, coating PVDC, drying, cooling, winding, curing the PVC/ PE/ PVDC composite piece, slitting, checking, packaging, putting in storage and the like. According to the production technology of the PVC/PE/PVDC composite piece, a coating system provided with double coating heads is adopted, thus a coating effect is good and the production efficiency is greatly improved. Automatic connection can be realized among material rolls, so that the stop operation is not needed; the PVDC with high barrier property is compounded on the PVC/PE composite material and has very good effects of preventing seepage and volatilization for agents in a package, so that the PVC/PE/PVDC composite piece is an ideal packing material.
Description
Technical field
The present invention relates to a kind of production technology of packaging material, relate in particular to a kind of production technology of PVC/PE/PVDC composite sheet.
Background technology
PVC pharmaceutical pack series composite sheet is mainly by medicinal of PVC and another one or more novel high polymer material film, sheet, and by extruding, the processing method such as compound, coating, another that produce meets the novel combination material that pharmaceutical pack requires.The security that enters the medication nineties more and more is subject to everybody attention.Because the composition of some medicine is vulnerable to deliquescence, oxidation, original PVC is aluminum-plastic packaged can not meet these pharmaceutical packing requirements.
The PVC/PE composite sheet be medicinal PVC hard piece with low density PE through the bonding composite sheet formed of adhesive.Be mainly used in the products such as the filling invigorant of low dose of disposable plastic ampoule bottle form, soft drink, cosmetics, there are light weight, safety, the reliable characteristics of health, can substitute glass ampule for oral liquid bottle packing.In actual application, after common PVC/PE composite is recorded liquid preparation, because of the stronger volatility of some liquid tool, after storage a period of time, can volatilize, cause the explosive payload deficiency, the finished product outward appearance caves inward, and the effective performance of medicine is had a greatly reduced quality.
PVDC, formal name used at school " polyvinylidene chloride " is a kind of softening temperature at the thermoplastic polymer of 160～200 ℃, has linear polymerization chain structure from beginning to end, the molecular structure symmetry, degree of crystallinity is high.For PVDC, because its intermolecular cohesive force is strong, degree of crystallinity is high, chlorine atom in the PVDC molecule has hydrophobicity, can not form hydrogen bond, oxygen molecule and hydrone are difficult to move in the PVDC molecule, thereby it is moist with resistance to make it have good oxygen barrier, and its oxygen barrier is not subject to the impact of ambient humidity.That is to say, under any temperature or damp condition, have the ability of remarkable obstruct steam, oxygen, smell and fragrance concurrently, is the best plastic package material of combination property aspect barrier of generally acknowledging at present.Main application fields: the fields such as cheese, soup, snacks, retort pouch, medical package, dry type packaging for foodstuff, biscuit and cereal preparation, pet food, the upper and lower film of stretching, sauce, meat products, flexible package punch, bean product packing, electronic product packing, chemical industry packing.
Summary of the invention
The object of the invention is to overcome above shortcomings in prior art, a kind of production technology of PVC/PE/PVDC composite sheet is provided.
A kind of production technology of PVC/PE/PVDC composite sheet, comprise the steps:
(1) the hard sheet of PVC unreels: unreel brake pressure and be controlled at 0.5～3.0bar;
(2) adhesive coating for the first time: the upper surface at the hard sheet of PVC applies the first adhesive and dries in the drying tunnel of 50～85 ℃, and drying tunnel tension force is at 200～380N;
(3) the PE film unreels: unreel brake pressure and be controlled at 0.5～2.5bar, the PE surface tension is not less than 42mN/m;
(4) PVC/PE is compound: the hard sheet of PVC and the PE film that are coated with adhesive carry out hot pressing, 50～85 ℃ of hot-pressing roller temperature, pressure 3.0～4.0bar on set composite;
(5) cooling, the rolling of PVC/PE composite sheet, slaking: the PVC/PE composite sheet is after chill roll is cooling, and rolling is put into 35～45 ℃ of environment maturation process 7～10 days;
(6) the PVC/PE composite sheet unreel, trimming, sided corona treatment: the PVC/PE composite sheet unreeled and carry out trimming, carry out PE film surface corona simultaneously and process, making more than its surface tension reaches 42mN/m;
(7) adhesive coating for the second time: on the PE of PVC/PE composite sheet film surface, apply the second adhesive and dry in the baking oven of 50～70 ℃;
(8) PVDC coating: be coated with in the PVC/PE composite sheet on the surface of adhesive and apply the PVDC emulsion;
(9) dry, cooling, rolling: PVDC coating is rear first through FAR INFRARED HEATING, then through hot blast drying tunnel drying, rolling after cooling;
(10) PVC/PE/PVDC composite sheet slaking, cut, check, pack, put in storage: the material after step (9) twists in 30～40 ℃ of environment slaking 1～2 day, is then cut and obtains the PVC/PE/PVDC composite sheet.
Preferably, in step (2), spread is controlled at 3～5g/m
2, the relative velocity 40～50m/min of the hard sheet of PVC, applicator roll and metering roll speed are controlled at 100～130% of the hard sheet speed of PVC, the adhesive solid content is 30～50%, viscosity for be coated with-4 glasss 10～20 seconds.
Preferably, in step (8), the PVDC coating comprises that the PVDC primary coat, the several times PVDC that carry out sequentially add painting and the PVDC top is coated with, and spread is 0.6～0.8g/m
2, the relative velocity 20～30m/min of PVC/PE composite sheet, applicator roll and metering roll speed are controlled at 100～150% of PVC/PE composite sheet speed, the adhesive solid content is 15～20%, hardening time 24～48h, 30～40 ℃ of solidification temperatures, viscosity for be coated with-4 glasss 10～20 seconds.
Preferably, after the PVDC coating, the far infrared drying device drying that is first 450～500 ℃ through temperature, then be respectively two joint hot blast drying tunnel dryings of 60～75 ℃ and 65～85 ℃ through temperature, the far infrared drying device drying that to add Tu Houxian be 400～600 ℃ through temperature, then be respectively three joint hot blast drying tunnel dryings of 60～78 ℃, 70～85 ℃ and 70～90 ℃ through temperature, drying tunnel tension force is 300～350N, then be cooled to rolling below 50 ℃, winding tension is 200～300N.
Preferably, described PVDC coating adopts reverse intaglio plate coating system, and described coating system is with two dispense tips, and described applicator roll speed is controlled at 90～120% of PVC/PE composite sheet speed.
Preferably, described PVDC emulsion comprises PVDC latex A and PVDC emulsion B, the solid content 54～56% of described PVDC latex A, proportion 1.29g/m3, pH value is 2～4, in the time of 23 ℃, viscosity is 7～14mPa.s, the solid content 59～61% of PVDC emulsion B, proportion 1.30～1.33, pH value is 2～4, in the time of 23 ℃, viscosity is 10～30mPa.s, and described PVDC latex A is for pushing up painting, and PVDC emulsion B is for primary coat.
When preferably, described PVDC adds painting, the single application amount is 6～12g/m
2.
Preferably, described the first adhesive adopts the UK3640/UK6800 two-component polyurethane adhesive, and UK3640 adhesive solid content is that 55～65%, UK6800 adhesive solid content is 95～100%; The second adhesive adopts the EPS71/KN75 two-component adhesive, and EPS71 adhesive solid content is that 65～75%, KN75 adhesive solid content is 70～80%.
Preferably, in step (6), described sided corona treatment number of times is for more than once, and the speed of a motor vehicle is controlled at 30m/min, and sided corona treatment power is 2.0～4.5KW.
Preferably, described production technology also comprises following check: the check of the check of the compound initial adhesive strength of PVC/PE, PVDC primary coat adhesion strength, PVDC emulsion B add the painting check and PVDC latex A top is coated with check.
The preparation solvent of described the first adhesive and the second adhesive adopts ethyl acetate.
The present invention twists in the loose winding process at material, during the out-of-flatness of material crimping, can substantially aim at same position by correction castor adjustment sheet; When the material coil diameter loose winding arrives about 300mm, can proceed in the storage feeding position by the material volume, and, with chain lifting virgin material volume, load onto the air cooling brake device; Virgin material roll film head is cut into to trapezoidal shape, and sticks two road two-sided tapes; Virgin material volume is shifted near to rubber rollers, the head that are stained with adhesive tape are inserted to approximately 2～3cm of gap between two rubber rollers; When the first coiled strip, by Song Wanshi, by handle, two rubber rolls are closed up, the cutting knife driven with second handle after the head that are stained with adhesive tape cling the first coiled strip through rubber rollers cuts off the first coiled strip, completes automatically and plugs into, and then takes out the air-expanding shaft of loose complete material volume.
PVC/PE/PVDC composite sheet production technology of the present invention, the coating system of the two dispense tips of employing, not only Painting effect is good, and has greatly improved production efficiency, between material volume of the present invention, can realize automatically plugging into, without shut-down operation; The PVDC that compound barrier property is high again on the PVC/PE composite has played extraordinary antiseepage, volatilization prevention effect to the medicine in packing, and is optimal packaging material.
The accompanying drawing explanation
Fig. 1 is process chart of the present invention.
The specific embodiment
Below in conjunction with the drawings and specific embodiments, the invention will be further described, but protection scope of the present invention is not limited to this.
Embodiment 1
With reference to Fig. 1, a kind of production technology of PVC/PE/PVDC composite sheet, comprise the steps:
(1) the hard sheet of PVC unreels: unreel brake pressure and be controlled at 0.5～3.0bar, the hard sheet thickness of PVC is 0.25 ± 0.015mm or 0.20 ± 0.01mm;
(2) adhesive coating for the first time: the upper surface at the hard sheet of PVC applies the first adhesive and dries in the drying tunnel of 50～85 ℃, and drying tunnel tension force is at 200～380N;
Spread is controlled at 3～5g/m
2, the relative velocity 40～50m/min of the hard sheet of PVC, applicator roll and metering roll speed are controlled at 100～130% of the hard sheet speed of PVC, the adhesive solid content is 30～50%, viscosity for be coated with-4 glasss 10～20 seconds; Described the first adhesive adopts the UK3640/UK6800 two-component polyurethane adhesive, and UK3640 adhesive solid content is that 60%, UK6800 adhesive solid content is 99.5%; The first adhesive adopts the ethyl acetate solvent preparation;
(3) the PE film unreels: unreel brake pressure and be controlled at 0.5～2.5bar, the PE surface tension is not less than 42mN/m; The PE film thickness is 0.05 ± 0.005mm or 0.025 ± 0.005mm;
(4) PVC/PE is compound: the hard sheet of PVC and the PE film that are coated with adhesive carry out hot pressing, 50～85 ℃ of hot-pressing roller temperature, pressure 3.0～4.0bar on set composite;
(5) cooling, the slaking of PVC/PE composite sheet: the PVC/PE composite sheet is after chill roll is cooling, and rolling is put into 35～45 ℃ of environment maturation process 7～10 days;
(6) trimming, sided corona treatment: the PVC/PE composite sheet is carried out to trimming, carry out PE film surface corona simultaneously and process, make more than its surface tension reaches 42mN/m; Described sided corona treatment number of times is for more than once, and the speed of a motor vehicle is controlled at 30m/min, and sided corona treatment power is 2.0～4.5KW;
(7) adhesive coating for the second time: on the PE of PVC/PE composite sheet film surface, apply the second adhesive and dry in the baking oven of 50～70 ℃; The second adhesive adopts the EPS71/KN75 two-component adhesive, and EPS71 adhesive solid content is that 71%, KN75 adhesive solid content is 75%; The second adhesive adopts the ethyl acetate solvent preparation;
(8) PVDC coating: be coated with in the PVC/PE composite sheet on the surface of adhesive and apply the PVDC emulsion, applicator roll speed is controlled at 90～120% of PVC/PE composite sheet speed, makes the PVDC coating on applicator roll even, smooth, without linear fringe and bubble; The PVDC coating adopts reverse intaglio plate coating system, and described coating system is with two dispense tips; The PVDC coating comprises that the PVDC primary coat, the several times PVDC that carry out sequentially add painting and the PVDC top is coated with, and spread is 0.6～0.8g/m
2, the relative velocity 20～30m/min of PVC/PE composite sheet, metering roll speed is controlled at 100～150% of PVC/PE composite sheet speed, the adhesive solid content is 15～20%, hardening time 24～48h, 30～40 ℃ of solidification temperatures, viscosity for be coated with-4 glasss 10～20 seconds; The primary coat color is stopped using after turning white;
Described PVDC emulsion comprises PVDC latex A and PVDC emulsion B, the solid content 55% of described PVDC latex A, proportion 1.29g/m
3, when pH value is 3,23 ℃, viscosity is 7mPa.s, the solid content 60% of PVDC emulsion B, and proportion 1.31, when pH value is 3,23 ℃, viscosity is 10mPa.s, and described PVDC latex A is for pushing up painting, and PVDC emulsion B is for primary coat; It is 6～12g/m that described PVDC adds single application amount while being coated with
2;
(9) dry, cooling, rolling: PVDC coating is rear first through FAR INFRARED HEATING, then through hot blast drying tunnel drying, rolling after cooling; After the PVDC coating, the far infrared drying device drying that is first 450～500 ℃ through temperature, then be respectively two joint hot blast drying tunnel dryings of 60～75 ℃ and 65～85 ℃ through temperature, the far infrared drying device drying that to add Tu Houxian be 400～600 ℃ through temperature, then be respectively three joint hot blast drying tunnel dryings of 60～78 ℃, 70～85 ℃ and 70～90 ℃ through temperature, drying tunnel tension force is 300～350N, then is cooled to rolling below 50 ℃, and winding tension is 200～300N;
(10) PVC/PE/PVDC composite sheet slaking, cut, check, pack, put in storage: the material after step (9) twists in 30～40 ℃ of environment slaking 1～2 day, is then cut and obtains the PVC/PE/PVDC composite sheet.
Twist in the loose winding process at material, during the out-of-flatness of material crimping, can substantially aim at same position by correction castor adjustment sheet; When the material coil diameter loose winding arrives about 300mm, can proceed in the storage feeding position by the material volume, and, with chain lifting virgin material volume, load onto the air cooling brake device; Virgin material roll film head is cut into to trapezoidal shape, and sticks two road two-sided tapes; Virgin material volume is shifted near to rubber rollers, the head that are stained with adhesive tape are inserted to approximately 2～3cm of gap between two rubber rollers; When the first coiled strip, by Song Wanshi, by handle, two rubber rolls are closed up, the cutting knife driven with second handle after the head that are stained with adhesive tape cling the first coiled strip through rubber rollers cuts off the first coiled strip, completes automatically and plugs into, and then takes out the air-expanding shaft of loose complete material volume.
After primary coat is adjusted, put down the backing roll of PVDC coating head, the fine setting doctor position, adjust the applicator roll rotating speed until the PVDC coating on base material is even, smooth, without obvious striped, bubble.The PVDC that is back to defoam tank will adopt 80 order spun silk cloth to be filtered, and with the particle of elimination crystallization, the particle on spun silk cloth is a lot, while affect the rate of filtration, just must the replacing screen pack.In the situation that screen pack is not broken, within general 2 days, change one time screen pack.In knife rest, the PVDC emulsion will be eliminated if any the last generation of bubble at once, to guarantee coating quality.Two PVDC groove that flows is arranged on the plastic dam of PVDC coating knife rest, must per cleaning half an hour once, with anti-clogging, if obstruction will be changed at once.In the coating production process, a dispense tip of cleaning in every four hours, to prevent the PVDC crystal.
After PVDC emulsion B coating weight reaches technological requirement, the stop cleaning coating head, transposing PVDC latex A top is coated with.Carry out the adhesive strength detection after rolling, with the adhesive tape method reach PVDC do not glue from, then according to the requirement of coating weight, carry out the painting that adds of certain number of times, reach regulation and require coating weight, be coated with must be with the coating of PVDC latex A on top for the last time.
In the production process of PVC/PE/PVDC composite sheet, need to check as follows:
The check of the compound initial adhesive strength of PVC/PE:
After material volume change of lap, clip is one meter long leaf approximately, checks initial adhesive strength, PE film and the hard sheet of PVC are pulled open, and resistance is larger, and on PVC, PE, all have glue for qualified, if be easy to pull open, and what on the PE film, there is no glue is defective, and assay is charged to the mass transfer card.
The check of PVDC primary coat adhesion strength:
With blade on the slice, thin piece good in primary coat laterally parallel (or vertically) draw upper several cuttves, by the vertical cutter track of yellow BOPP adhesive tape, be attached on slice, thin piece, smooth, then pull-up adhesive tape, as do not have the PVDC coating to stick up to be just qualified, assay is charged to the mass transfer card, the mass transfer card is put into to the material volume after qualified, otherwise, underproof placement separately.
PVDC emulsion B adds the painting check:
Head are cut into to trapezoidal shape, stick two road two-sided tapes, move on to and unreel post after unloading with hydraulic car, after PVDC emulsion B adds and is coated with and reaches the number of times of technological requirement, cut off joint, cut again the approximately slice, thin piece of a meter long and hand over inspector's test coated amount, after qualified, the mass transfer card is put into to the material volume, after unloading with the hydraulic car that rubber matting is arranged, move to the appointment shelf, underproofly continue to add painting;
The PVDC coating weight is measured: according to the different requirements of product, after being applied to certain number of times, will measure the PVDC coating weight;
Get a coated sheet material, laterally evenly cut five blocks of sheet materials of 10 * 10cm and immerse in acetone, until the PVDC film that can peel shakeouts, weigh after dry with wind, weight is multiplied by 20 coating weights that are sheet material;
While doing the PVC/PE/PVDC composite sheet, what sometimes peel is the PE/PVDC film, and its weight is multiplied by 20 gram weight that are PE/PVDC.
PVDC latex A top is coated with check:
After the coating weight of PVDC emulsion B or PE/PVDC gram weight reach technological requirement, just can push up and be coated with the PVDC latex A, top is coated with the sheet material after the PVDC latex A, also will measure PVDC coating weight or PE/PVDC gram weight, reach after product standard and just can advance drying room and solidify, underproof continuation coating.The PVDC coating weight of PVC/PVDC composite sheet: the PVDC coating weight of ± 7%, PVC/PE/PVDC composite sheet :+10% ,-5%.
The thickness of PVC/PE/PVDC composite sheet of the present invention is 0.267～0.304mm.
Finally, carry out the inspection of composite coating quality:
The inspector compound or while being coated with at every volume at every turn, examine the defect of base material, the quality condition produced in compound or coating, and be recorded in detail on the mass transfer card.
It is flammable and combustible liquids that the present invention produces adhesive used, and the flash-point of solvent ethyl acetate is-4 ℃, in order to guarantee safety in production, workshop is equipped with a combustable gas concentration monitor, respectively at coating line, cut between, drying room and exhaust-gas treatment chamber be provided with 6 supervision points, can supervise at any time workshop ethyl acetate gas concentration, and be presented on LCDs.When concentration reach ethyl acetate in air explosion ratio lower limit (12% volume) 20% the time send warning.Discovery exceeds standard and reports to the police and will process in time, opens ventilating fan and workshop air exhauster, reduces gas concentration.
Embodiment 2
With reference to Fig. 1, a kind of production technology of PVC/PE/PVDC composite sheet, comprise the steps:
(1) the hard sheet of PVC unreels: unreel brake pressure and be controlled at 2.2bar, the hard sheet thickness of PVC is 0.20mm;
(2) adhesive coating for the first time: the upper surface at the hard sheet of PVC applies the first adhesive and dries in the drying tunnel of 65 ℃, and drying tunnel tension force is at 260N;
Spread is controlled at 4g/m
2, the relative velocity 45m/min of the hard sheet of PVC, applicator roll and metering roll speed are controlled at 110% of the hard sheet speed of PVC, the adhesive solid content is 35%, viscosity for be coated with-4 glasss 17 seconds; Described the first adhesive adopts the UK3640/UK6800 two-component polyurethane adhesive, and UK3640 adhesive solid content is that 60%, UK6800 adhesive solid content is 99.5%; The first adhesive adopts the ethyl acetate solvent preparation;
(3) the PE film unreels: unreel brake pressure and be controlled at 1.8bar, the PE surface tension is not less than 42mN/m; The PE film thickness is 0.03mm;
(4) PVC/PE is compound: the hard sheet of PVC and the PE film that are coated with adhesive carry out hot pressing, hot-pressing roller temperature 60 C, pressure 3.3bar on set composite;
(5) cooling, the slaking of PVC/PE composite sheet: the PVC/PE composite sheet is after chill roll is cooling, and rolling is put into 35 ℃ of environment maturation process 9 days;
(6) trimming, sided corona treatment: the PVC/PE composite sheet is carried out to trimming, carry out PE film surface corona simultaneously and process, described sided corona treatment number of times 1 time, make more than its surface tension reaches 42mN/m; The speed of a motor vehicle is controlled at 30m/min, and sided corona treatment power is 3.1KW;
(7) adhesive coating for the second time: on the PE of PVC/PE composite sheet film surface, apply the second adhesive and dry in the baking oven of 70 ℃; The second adhesive adopts the EPS71/KN75 two-component adhesive, and EPS71 adhesive solid content is that 71%, KN75 adhesive solid content is 75%; The second adhesive adopts the ethyl acetate solvent preparation;
(8) PVDC coating: be coated with in the PVC/PE composite sheet on the surface of adhesive and apply the PVDC emulsion, make the PVDC coating on applicator roll even, smooth, without linear fringe and bubble; The PVDC coating adopts reverse intaglio plate coating system, and described coating system is with two dispense tips; The PVDC coating comprises that the PVDC primary coat of carrying out sequentially, 5 PVDC add painting and the painting of PVDC top, and spread is 0.7g/m
2, the relative velocity 27m/min of PVC/PE composite sheet, applicator roll speed is controlled at 120% of PVC/PE composite sheet speed, metering roll speed is controlled at 130% of PVC/PE composite sheet speed, and the adhesive solid content is 15.7%, hardening time 32h, 28 ℃ of solidification temperatures, viscosity for be coated with-4 glasss 14 seconds; The primary coat color is stopped using after turning white;
Described PVDC emulsion comprises PVDC latex A and PVDC emulsion B, the solid content 56% of described PVDC latex A, proportion 1.29g/m
3, when pH value is 2.8,23 ℃, viscosity is 11mPa.s, the solid content 59% of PVDC emulsion B, and proportion 1.31, when pH value is 3.4,23 ℃, viscosity is 20mPa.s, and described PVDC latex A is for pushing up painting, and PVDC emulsion B is for primary coat; It is 9g/m that described PVDC adds single application amount while being coated with
2;
(9) dry, cooling, rolling: PVDC coating is rear first through FAR INFRARED HEATING, then through hot blast drying tunnel drying, rolling after cooling; After the PVDC primary coat, the far infrared drying device drying that is first 480 ℃ through temperature, then be respectively two joint hot blast drying tunnel dryings of 69 ℃ and 75 ℃ through temperature, the far infrared drying device drying that to add Tu Houxian be 550 ℃ through temperature, then be respectively three joint hot blast drying tunnel dryings of 63 ℃, 75 ℃ and 85 ℃ through temperature, drying tunnel tension force is 330N, then is cooled to 40 ℃ of rollings, and winding tension is 270N;
(10) PVC/PE/PVDC composite sheet slaking, cut, check, pack, put in storage: the material after step (9) twists in 35 ℃ of environment slaking 1.5 days, is then cut and obtains the PVC/PE/PVDC composite sheet.
Claims (10)
1. the production technology of a PVC/PE/PVDC composite sheet, is characterized in that comprising the steps:
(1) the hard sheet of PVC unreels: unreel brake pressure and be controlled at 0.5～3.0bar;
(2) adhesive coating for the first time: the upper surface at the hard sheet of PVC applies the first adhesive and dries in the drying tunnel of 50～85 ℃, and drying tunnel tension force is at 200～380N;
(3) the PE film unreels: unreel brake pressure and be controlled at 0.5～2.5bar, the PE surface tension is not less than 42mN/m;
(4) PVC/PE is compound: the hard sheet of PVC and the PE film that are coated with adhesive carry out hot pressing, 50～85 ℃ of hot-pressing roller temperature, pressure 3.0～4.0bar on set composite;
(5) cooling, the rolling of PVC/PE composite sheet, slaking: the PVC/PE composite sheet is after chill roll is cooling, and rolling is put into 35～45 ℃ of environment maturation process 7～10 days;
(6) the PVC/PE composite sheet unreel, trimming, sided corona treatment: the PVC/PE composite sheet unreeled and carry out trimming, carry out PE film surface corona simultaneously and process, making more than its surface tension reaches 42mN/m;
(7) adhesive coating for the second time: on the PE of PVC/PE composite sheet film surface, apply the second adhesive and dry in the baking oven of 50～70 ℃;
(8) PVDC coating: be coated with in the PVC/PE composite sheet on the surface of adhesive and apply the PVDC emulsion;
(9) dry, cooling, rolling: PVDC coating is rear first through FAR INFRARED HEATING, then through hot blast drying tunnel drying, rolling after cooling;
(10) PVC/PE/PVDC composite sheet slaking, cut, check, pack, put in storage: the material after step (9) twists in 30～40 ℃ of environment slaking 1～2 day, is then cut and obtains the PVC/PE/PVDC composite sheet.
2. the production technology of PVC/PE/PVDC composite sheet according to claim 1, it is characterized in that: in step (2), spread is controlled at 3～5g/m
2, the relative velocity 40～50m/min of the hard sheet of PVC, applicator roll and metering roll speed are controlled at 100～130% of the hard sheet speed of PVC, the adhesive solid content is 30～50%, viscosity for be coated with-4 glasss 10～20 seconds.
3. the production technology of PVC/PE/PVDC composite sheet according to claim 1 is characterized in that: in step (8), the PVDC coating comprises that the PVDC primary coat, the several times PVDC that carry out sequentially add and is coated with and the PVDC top is coated with, and spread is 0.6～0.8g/m
2, the relative velocity 20～30m/min of PVC/PE composite sheet, applicator roll and metering roll speed are controlled at 100～150% of PVC/PE composite sheet speed, the adhesive solid content is 15～20%, hardening time 24～48h, 30～40 ℃ of solidification temperatures, viscosity for be coated with-4 glasss 10～20 seconds.
4. the production technology of PVC/PE/PVDC composite sheet according to claim 3, it is characterized in that: after the PVDC coating, the far infrared drying device drying that is first 450～500 ℃ through temperature, then be respectively two joint hot blast drying tunnel dryings of 60～75 ℃ and 65～85 ℃ through temperature, the far infrared drying device drying that to add Tu Houxian be 400～600 ℃ through temperature, then be respectively three joint hot blast drying tunnel dryings of 60～78 ℃, 70～85 ℃ and 70～90 ℃ through temperature, drying tunnel tension force is 300～350N, then be cooled to rolling below 50 ℃, winding tension is 200～300N.
5. the production technology of PVC/PE/PVDC composite sheet according to claim 3, it is characterized in that: described PVDC coating adopts reverse intaglio plate coating system, described coating system is with two dispense tips, and described applicator roll speed is controlled at 90～120% of PVC/PE composite sheet speed.
6. the production technology of PVC/PE/PVDC composite sheet according to claim 3, it is characterized in that: described PVDC emulsion comprises PVDC latex A and PVDC emulsion B, the solid content 54～56% of described PVDC latex A, proportion 1.29g/m
3, when pH value is 2～4,23 ℃, viscosity is 7～14mPa.s, the solid content 59～61% of PVDC emulsion B, and proportion 1.30～1.33, when pH value is 2～4,23 ℃, viscosity is 10～30mPa.s, and described PVDC latex A is for pushing up painting, and PVDC emulsion B is for primary coat.
7. the production technology of PVC/PE/PVDC composite sheet according to claim 3 is characterized in that: it is 6～12g/m that described PVDC adds single application amount while being coated with
2.
8. the production technology of PVC/PE/PVDC composite sheet according to claim 1, it is characterized in that: described the first adhesive adopts the UK3640/UK6800 two-component polyurethane adhesive, UK3640 adhesive solid content is that 55～65%, UK6800 adhesive solid content is 95～100%; The second adhesive adopts the EPS71/KN75 two-component adhesive, and EPS71 adhesive solid content is that 65～75%, UK6800 adhesive solid content is 70～80%.
9. the production technology of PVC/PE/PVDC composite sheet according to claim 1 is characterized in that: in step (6), described sided corona treatment number of times is for more than once, and the speed of a motor vehicle is controlled at 30m/min, and sided corona treatment power is 2.0～4.5KW.
10. the production technology of PVC/PE/PVDC composite sheet according to claim 1, it is characterized in that: described production technology also comprises following check: the check of the check of the compound initial adhesive strength of PVC/PE, PVDC primary coat adhesion strength, PVDC emulsion B add and are coated with check and PVDC latex A top is coated with check.
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| CN103934942A (en) * | 2014-04-21 | 2014-07-23 | 淄博中南塑胶有限公司 | Production technology of PVC/PVDC (polyvinyl chloride/polyvinyl dichloride) composite sheet |
| CN105584181A (en) * | 2016-02-04 | 2016-05-18 | 四川汇利实业有限公司 | Production method of PE/PVC composite sheet for improving production efficiency |
| CN105711210A (en) * | 2016-02-04 | 2016-06-29 | 四川汇利实业有限公司 | Preparation method of PVC/PE/PVDC compound sheet |
| CN106626706A (en) * | 2016-12-20 | 2017-05-10 | 江苏凯威药用包装有限公司 | Production process of hard medicinal PVC/PVDC composite sheet |
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| CN103934942A (en) * | 2014-04-21 | 2014-07-23 | 淄博中南塑胶有限公司 | Production technology of PVC/PVDC (polyvinyl chloride/polyvinyl dichloride) composite sheet |
| CN105584181A (en) * | 2016-02-04 | 2016-05-18 | 四川汇利实业有限公司 | Production method of PE/PVC composite sheet for improving production efficiency |
| CN105711210A (en) * | 2016-02-04 | 2016-06-29 | 四川汇利实业有限公司 | Preparation method of PVC/PE/PVDC compound sheet |
| CN106626706A (en) * | 2016-12-20 | 2017-05-10 | 江苏凯威药用包装有限公司 | Production process of hard medicinal PVC/PVDC composite sheet |
| CN107962785A (en) * | 2017-10-20 | 2018-04-27 | 重庆市金利药包材料有限公司 | A kind of Medicinal composite film processing technology |
| CN109049907A (en) * | 2018-06-28 | 2018-12-21 | 大连佳兴塑料有限公司 | Food packaging plastic sheet/PE film composite material and preparation method |
| CN111474076A (en) * | 2020-03-25 | 2020-07-31 | 山东省医疗器械产品质量检验中心 | Method for separating polyvinylidene chloride coating in medicinal composite material and application |
| CN114872411A (en) * | 2022-04-13 | 2022-08-09 | 广东柏拉图塑胶有限公司 | PVDC (polyvinyl dichloride) and PVC (polyvinyl chloride) coated high-barrier sandwich mesh cloth and preparation method thereof |
| CN117507386A (en) * | 2024-01-04 | 2024-02-06 | 上海春宜药品包装材料有限公司 | PVC-PVDC composite film production equipment and production process |
| CN117507386B (en) * | 2024-01-04 | 2024-04-12 | 上海春宜药品包装材料有限公司 | PVC-PVDC composite film production equipment and production process |
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