CN104650669A - Polyvinyl alcohol coating solution applied to short drying channel and coating process of coating solution - Google Patents
Polyvinyl alcohol coating solution applied to short drying channel and coating process of coating solution Download PDFInfo
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- CN104650669A CN104650669A CN201510042806.1A CN201510042806A CN104650669A CN 104650669 A CN104650669 A CN 104650669A CN 201510042806 A CN201510042806 A CN 201510042806A CN 104650669 A CN104650669 A CN 104650669A
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- polyvinyl alcohol
- coating
- coating solution
- applicable
- short drying
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- 238000000576 coating method Methods 0.000 title claims abstract description 92
- 239000004372 Polyvinyl alcohol Substances 0.000 title claims abstract description 84
- 229920002451 polyvinyl alcohol Polymers 0.000 title claims abstract description 84
- 239000011248 coating agent Substances 0.000 title claims abstract description 75
- 238000001035 drying Methods 0.000 title claims abstract description 36
- 239000000243 solution Substances 0.000 claims abstract description 44
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 32
- 239000002245 particle Substances 0.000 claims abstract description 16
- 239000012153 distilled water Substances 0.000 claims abstract description 15
- 239000011259 mixed solution Substances 0.000 claims abstract description 11
- 239000003995 emulsifying agent Substances 0.000 claims abstract description 4
- 239000002994 raw material Substances 0.000 claims abstract description 4
- 238000003756 stirring Methods 0.000 claims description 21
- 210000002469 basement membrane Anatomy 0.000 claims description 18
- 239000000463 material Substances 0.000 claims description 18
- 238000001816 cooling Methods 0.000 claims description 12
- 239000003292 glue Substances 0.000 claims description 12
- 239000012752 auxiliary agent Substances 0.000 claims description 9
- 238000007603 infrared drying Methods 0.000 claims description 9
- 239000007788 liquid Substances 0.000 claims description 9
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 claims description 6
- 238000007774 anilox coating Methods 0.000 claims description 6
- 238000003851 corona treatment Methods 0.000 claims description 6
- 238000010438 heat treatment Methods 0.000 claims description 6
- BDERNNFJNOPAEC-UHFFFAOYSA-N propan-1-ol Chemical compound CCCO BDERNNFJNOPAEC-UHFFFAOYSA-N 0.000 claims description 6
- SZIFAVKTNFCBPC-UHFFFAOYSA-N 2-chloroethanol Chemical compound OCCCl SZIFAVKTNFCBPC-UHFFFAOYSA-N 0.000 claims description 3
- KFZMGEQAYNKOFK-UHFFFAOYSA-N Isopropanol Chemical compound CC(C)O KFZMGEQAYNKOFK-UHFFFAOYSA-N 0.000 claims description 3
- LRHPLDYGYMQRHN-UHFFFAOYSA-N N-Butanol Chemical compound CCCCO LRHPLDYGYMQRHN-UHFFFAOYSA-N 0.000 claims description 3
- AMQJEAYHLZJPGS-UHFFFAOYSA-N N-Pentanol Chemical compound CCCCCO AMQJEAYHLZJPGS-UHFFFAOYSA-N 0.000 claims description 3
- -1 Polypropylene Polymers 0.000 claims description 3
- 239000004743 Polypropylene Substances 0.000 claims description 3
- 238000006136 alcoholysis reaction Methods 0.000 claims description 3
- 239000000919 ceramic Substances 0.000 claims description 3
- 239000013530 defoamer Substances 0.000 claims description 3
- PHTQWCKDNZKARW-UHFFFAOYSA-N isoamylol Chemical compound CC(C)CCO PHTQWCKDNZKARW-UHFFFAOYSA-N 0.000 claims description 3
- ZXEKIIBDNHEJCQ-UHFFFAOYSA-N isobutanol Chemical compound CC(C)CO ZXEKIIBDNHEJCQ-UHFFFAOYSA-N 0.000 claims description 3
- 229920006267 polyester film Polymers 0.000 claims description 3
- 229920001155 polypropylene Polymers 0.000 claims description 3
- 229920002635 polyurethane Polymers 0.000 claims description 3
- 239000004814 polyurethane Substances 0.000 claims description 3
- 238000002360 preparation method Methods 0.000 claims description 3
- 238000007711 solidification Methods 0.000 claims description 3
- 230000008023 solidification Effects 0.000 claims description 3
- 239000002904 solvent Substances 0.000 claims description 3
- 230000008961 swelling Effects 0.000 claims description 3
- 238000010792 warming Methods 0.000 claims description 3
- 229910052760 oxygen Inorganic materials 0.000 abstract description 13
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 abstract description 9
- 239000001301 oxygen Substances 0.000 abstract description 9
- 239000000654 additive Substances 0.000 abstract 2
- 239000000126 substance Substances 0.000 abstract 2
- 239000002518 antifoaming agent Substances 0.000 abstract 1
- 238000001704 evaporation Methods 0.000 abstract 1
- 208000022133 pulmonary valve agenesis Diseases 0.000 description 32
- 229920001328 Polyvinylidene chloride Polymers 0.000 description 11
- 230000004888 barrier function Effects 0.000 description 8
- 230000007613 environmental effect Effects 0.000 description 7
- 229910052799 carbon Inorganic materials 0.000 description 5
- 229910052739 hydrogen Inorganic materials 0.000 description 4
- 238000004806 packaging method and process Methods 0.000 description 4
- 238000012856 packing Methods 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 231100000614 poison Toxicity 0.000 description 3
- 230000007096 poisonous effect Effects 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 2
- 239000000460 chlorine Substances 0.000 description 2
- 229910052801 chlorine Inorganic materials 0.000 description 2
- 230000000295 complement effect Effects 0.000 description 2
- 239000012530 fluid Substances 0.000 description 2
- 208000020442 loss of weight Diseases 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 238000011084 recovery Methods 0.000 description 2
- 239000010802 sludge Substances 0.000 description 2
- 239000007787 solid Substances 0.000 description 2
- 125000001309 chloro group Chemical group Cl* 0.000 description 1
- 235000019504 cigarettes Nutrition 0.000 description 1
- 238000002425 crystallisation Methods 0.000 description 1
- 230000008025 crystallization Effects 0.000 description 1
- 238000000354 decomposition reaction Methods 0.000 description 1
- 238000004090 dissolution Methods 0.000 description 1
- 239000003814 drug Substances 0.000 description 1
- 239000000839 emulsion Substances 0.000 description 1
- 239000003205 fragrance Substances 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 231100001261 hazardous Toxicity 0.000 description 1
- 230000005389 magnetism Effects 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D129/00—Coating compositions based on 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; Coating compositions based on hydrolysed polymers of esters of unsaturated alcohols with saturated carboxylic acids; Coating compositions based on derivatives of such polymers
- C09D129/02—Homopolymers or copolymers of unsaturated alcohols
- C09D129/04—Polyvinyl alcohol; Partially hydrolysed homopolymers or copolymers of esters of unsaturated alcohols with saturated carboxylic acids
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D1/00—Processes for applying liquids or other fluent materials
- B05D1/36—Successively applying liquids or other fluent materials, e.g. without intermediate treatment
- B05D1/38—Successively applying liquids or other fluent materials, e.g. without intermediate treatment with intermediate treatment
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D3/00—Pretreatment of surfaces to which liquids or other fluent materials are to be applied; After-treatment of applied coatings, e.g. intermediate treating of an applied coating preparatory to subsequent applications of liquids or other fluent materials
- B05D3/06—Pretreatment of surfaces to which liquids or other fluent materials are to be applied; After-treatment of applied coatings, e.g. intermediate treating of an applied coating preparatory to subsequent applications of liquids or other fluent materials by exposure to radiation
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D3/00—Pretreatment of surfaces to which liquids or other fluent materials are to be applied; After-treatment of applied coatings, e.g. intermediate treating of an applied coating preparatory to subsequent applications of liquids or other fluent materials
- B05D3/14—Pretreatment of surfaces to which liquids or other fluent materials are to be applied; After-treatment of applied coatings, e.g. intermediate treating of an applied coating preparatory to subsequent applications of liquids or other fluent materials by electrical means
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D7/00—Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Materials Engineering (AREA)
- Wood Science & Technology (AREA)
- Organic Chemistry (AREA)
- Physics & Mathematics (AREA)
- Plasma & Fusion (AREA)
- Paints Or Removers (AREA)
- Application Of Or Painting With Fluid Materials (AREA)
- Laminated Bodies (AREA)
Abstract
The invention relates to a polyvinyl alcohol coating solution applied to a short drying channel and a coating process of the coating solution. The polyvinyl alcohol coating solution applied to the short drying channel comprises the following raw materials in parts: 50-100 parts of distilled water, 8-20 parts of PVA particles, 5-20 parts of a mixed solution and 0.5-2 parts of additives, wherein the mixed solution is made of the distilled water and one or more of 8 azeotropy substances; the mass ratio of the distilled water to the azeotropy substances is 1 to (0.5-3); the additives comprise an emulgator and a defoaming agent. The prepared polyvinyl alcohol coating solution is co-boiled; the temperature and the heat needed for thoroughly evaporating the solution can be reduced; the coating solution can be coated and produced in the short drying channel at the high speed; PVA coating films produced by the coating process are environmentally friendly and recyclable, and is low in cost, excellent in oxygen resistance and high in yield.
Description
Technical field
The present invention relates to a kind of the polyvinyl alcohol coating solution and the coating process thereof that are applicable to short drying tunnel.
Background technology
Technology
The leading product of current high obstructed coating film are polyvinylidene dichloride (PVDC) coated film, are commonly called as K film.PVDC molecular symmetry is good, easily forms crystallization, again containing a large amount of polarity chlorine atoms in molecule, intermolecular magnetism is strengthened greatly, and closely, water content is low in arrangement, there is good barrier and fragrance protectiveness, be widely used in the packaging of the products such as high-end food, medicine, cigarette.PVDC melt temperature Sum decomposition temperature own is close, is more difficultly secondary use, and easily produces poisonous and hazardous gas during high temperature incineration, is difficult to recycle, the shortcoming of inadequate environmental protection so that the K film wrapping material containing PVDC10 ~ 20% exist always.Polyvinyl alcohol (PVA) coated film is the novel high-barrier material in recent years risen, its oxygen obstruction ability is better than traditional K film greatly, also there is the advantages such as coating is thin, recyclable, environmental protection, make it in the packaging of dry type food, warmer etc., occupy increasing share.But be subject to the impact of dissolution characteristics and viscosity, be applicable to the PVA solution solid content of coating generally about 10%, and PVDC emulsion solid content often can reach 50%, traditional coating line due to drying tunnel shorter, cannot meet drying requirement during PVA coated film high-speed coating, this significantly limit the development of PVA coated film, adds production cost, poor practicability, limits popularization and the development of PVA coated film.
Summary of the invention
Main purpose of the present invention is to provide a kind of mode adopting azeotropic, reduces PVA solution and evaporates required temperature and heat completely, makes it the polyvinyl alcohol coating solution that can carry out high-speed coating production at short drying tunnel.
For solving the problem, the present invention is achieved through the following technical solutions:
Be applicable to a polyvinyl alcohol coating solution for short drying tunnel, it is characterized in that: the raw material comprising following number: 50-100 part distilled water, 8-20 part PVA particle, 5-20 part mixed solution and auxiliary agent 0.5-2 part; Described mixed solution comprises the azeotropic material of distilled water and 1-8 kind, and wherein distilled water compares 1:0.5-3 with azeotropic material mass; Described auxiliary agent comprises emulsifying agent and defoamer; Described polyvinyl alcohol coating solution making step is:
A, PVA particle is put in distilled water, stirring at normal temperature 1-3 hour, allows the abundant swelling of material, formed and stir liquid for the first time;
B, the first liquid that stirs is utilized water or steam heating, with 5-10 DEG C/min speed, be warming up to 80-100 DEG C, keep 1-5 hour, allow PVA particle fully be dissolved in water;
C, heating after stirring liquid lower the temperature, cooling method is Temperature fall or water-cooled cooling, and temperature, when 40-60 DEG C, adds mixed solution and auxiliary agent, continues to be stirred to less than 30 DEG C, stop stir;
D, omnidistance stirring velocity of preparing burden are between 60-150r/min.
As preferably, described azeotropic material is ethanol, chloroethanol, n-propyl alcohol, Virahol, isopropylcarbinol, propyl carbinol, Pentyl alcohol and primary isoamyl alcohol, reduces bake out temperature.
As preferably, described PVA particle is alcoholysis degree more than 95%, and volatile matter is less than 5%, the PVA particle that ash content is less than 0.5%, improves the efficiency of dissolving, and reduces residual.
As preferably, described polyvinyl alcohol coating solution configures between rear staging life, within every 8-12 hour, must stir 1-2 hour with 0-150r/min speed, improve to prevent coating fluid viscosity.
As preferably, in described polyvinyl alcohol coating solution, the mass concentration of PVA is that the chien shih soltion viscosity of 5%-15% is moderate, is applicable to coating requirement.
Another main purpose of the present invention is to adopt the mode of azeotropic, reduces solution and evaporates required temperature and heat completely, and environmental protection, cost are low, the polyvinyl alcohol coating process of what oxygen barrier was good be applicable to short drying tunnel.
For solving the problems of the technologies described above, the present invention adopts following technical scheme:
Be applicable to a polyvinyl alcohol coating process for short drying tunnel, comprise the following steps:
A, preparation thickness are the basement membrane of 10-100 μm;
B, basement membrane is carried out corona treatment;
C, on the basement membrane through corona treatment, carry out primary coat glue, the coating dry weight of primary coat glue is 0.1-1.0g/ ㎡;
D, the basement membrane carried out after primary coat is carried out drying tunnel oven dry;
Cool after e, oven dry;
Be coated with polyvinyl alcohol solution above f, basement membrane after the cooling period, the coating dry weight of polyvinyl alcohol solution is 0.5-2.0g/ ㎡, and coating travelling speed is 100-180m/min;
G, carry out infrared drying;
Carry out short drying tunnel oven dry after h, infrared drying, drying time in 3-6 second, the preferred 100-130 DEG C of bake out temperature;
I, cooling;
J, to cut according to the requirement of product;
K, solidification, temperature is 40-60 DEG C, and the time is 12-48 hour.
As preferably, described coating method is that reverse kiss is coated with, and coating anilox roll adopts 70-130 line, hole depth at the ceramic anilox roller of 40-70 μm, to be applicable to the weight in wet base be coated with.
As preferably, described polyvinyl alcohol coating solution before coating must at 30-45 DEG C of left at ambient temperature 0.5-3 hour, to eliminate bubble, avoid causing coating unstable and pollute.
As preferably, during described coating feeder system and coating roller must constant temperature at 30-45 DEG C, be applicable to coating to make viscosity of sludge.
As preferably, described basement membrane is BiOriented Polypropylene Films or biaxially oriented polyester film, and its water vapor barrier is good, complementary with PVA, improves the overall barrier of product.
As preferably, described primer is water-based or solvent borne polyurethane glue, carries out infrared drying after water-based glue primary coat, sticks effective.
The invention has the beneficial effects as follows: of the present invention provided polyvinyl alcohol solution and PVA are by C, H, O forms, and PVDC is by C, H, O, Cl tetra-kinds is elementary composition, therefore PVA uses environmental protection, easy recovery, burn and also as PVDC, do not have the poisonous material by doing harm to of generation, PVA coating solution water content in the present invention is low, the making of traditional short drying tunnel is applicable in the process of coating, cost is low, practicality is good, the invention provides the coated film not only Environmental Safety made by PVA coating solution simultaneously, oxygen barrier is good, can reclaim, yield is high, and namely PVA coating 0.5g-0.8g/ ㎡ can reach 1-2cm
3the/㎡ * oxygen flow transmitance of 24 hours, and PVDC coating 3g/ ㎡ just can reach the 8-10cm3/ ㎡ * OTR oxygen transmission rate of 24 hours, therefore PVA meets the principle of loss of weight packaging, namely increases with packing area under weight, can reduce the generation of packing material, range of application constantly increases.
Embodiment
For feature of the present invention, technique means and the specific purposes reached, function can be understood further, with embodiment, the present invention is described in further detail below.
Be applicable to a polyvinyl alcohol coating solution for short drying tunnel, it is characterized in that: the raw material comprising following number: 50-100 part distilled water, 8-20 part PVA particle, 5-20 part mixed solution and auxiliary agent 0.5-2 part; Described mixed solution comprises the azeotropic material of distilled water and 1-8 kind, and wherein distilled water compares 1:0.5-3 with azeotropic material mass; Described auxiliary agent comprises emulsifying agent and defoamer; Described polyvinyl alcohol coating solution making step is:
A, PVA particle is put in distilled water, stirring at normal temperature 1-3 hour, allows the abundant swelling of material, formed and stir liquid for the first time;
B, the first liquid that stirs is utilized water or steam heating, with 5-10 DEG C/min speed, be warming up to 80-100 DEG C, keep 1-5 hour, allow PVA particle fully be dissolved in water;
C, heating after stirring liquid lower the temperature, cooling method is Temperature fall or water-cooled cooling, and temperature, when 40-60 DEG C, adds mixed solution and auxiliary agent, continues to be stirred to less than 30 DEG C, stop stir;
D, omnidistance stirring velocity of preparing burden are between 60-150r/min.
Described azeotropic material is ethanol, chloroethanol, n-propyl alcohol, Virahol, isopropylcarbinol, propyl carbinol, Pentyl alcohol and primary isoamyl alcohol, reduces bake out temperature.
Described PVA particle is alcoholysis degree more than 95%, and volatile matter is less than 5%, the PVA particle that ash content is less than 0.5%, improves the efficiency of dissolving, and reduces residual.
Described polyvinyl alcohol coating solution configures between rear staging life, within every 8-12 hour, must stir 1-2 hour with 0-150r/min speed, improve to prevent coating fluid viscosity.
In described polyvinyl alcohol coating solution, the mass concentration of PVA is that the chien shih soltion viscosity of 5%-15% is moderate, is applicable to coating requirement.
Be applicable to a polyvinyl alcohol coating process for short drying tunnel, comprise the following steps:
A, preparation thickness are the basement membrane of 10-100 μm;
B, basement membrane is carried out corona treatment;
C, on the basement membrane through corona treatment, carry out primary coat glue, the coating dry weight of primary coat glue is 0.1-1.0g/ ㎡;
D, the basement membrane carried out after primary coat is carried out drying tunnel oven dry;
Cool after e, oven dry;
Be coated with polyvinyl alcohol solution above f, basement membrane after the cooling period, the coating dry weight of polyvinyl alcohol solution is 0.5-2.0g/ ㎡, and coating travelling speed is 100-180m/min;
G, carry out infrared drying;
Carry out short drying tunnel oven dry after h, infrared drying, drying time in 3-6 second, the preferred 100-130 DEG C of bake out temperature;
I, cooling;
J, to cut according to the requirement of product;
K, solidification, temperature is 40-60 DEG C, and the time is 12-48 hour.
Described coating method is that reverse kiss is coated with, and coating anilox roll adopts 70-110 line, hole depth at the ceramic anilox roller of 40-70 μm, to be applicable to the weight in wet base be coated with.
Described polyvinyl alcohol coating solution must, at 30-45 DEG C of left at ambient temperature 0.5-3 hour, to eliminate bubble, be avoided causing coating instability and polluting before coating.
During described coating, feeder system and coating roller palpus constant temperature are at 30-45 DEG C, are applicable to coating to make viscosity of sludge.
Described basement membrane is BiOriented Polypropylene Films or biaxially oriented polyester film, and its water vapor barrier is good, complementary with PVA, improves the overall barrier of product.
Described primer is water-based or solvent borne polyurethane glue, carries out infrared drying after water-based glue primary coat, sticks effective.
Experimental data:
The invention has the beneficial effects as follows: of the present invention provided polyvinyl alcohol solution and PVA are by C, H, O forms, and PVDC is by C, H, O, Cl tetra-kinds is elementary composition, therefore PVA uses environmental protection, easy recovery, burn and also as PVDC, do not have the poisonous material by doing harm to of generation, PVA coating solution water content in the present invention is low, the making of traditional short drying tunnel is applicable in the process of coating, cost is low, practicality is good, the invention provides the coated film not only Environmental Safety made by PVA coating solution simultaneously, oxygen barrier is good, can reclaim, yield is high, and namely PVA coating 0.5g-0.8g/ ㎡ can reach the 1-2cm3/ ㎡ * oxygen flow transmitance of 24 hours, and PVDC coating 3g/ ㎡ just can reach the 8-10cm3/ ㎡ * OTR oxygen transmission rate of 24 hours, therefore PVA meets the principle of loss of weight packaging, namely increase with packing area under weight, can reduce the generation of packing material, range of application constantly increases.
The above, be only the specific embodiment of the present invention, but protection scope of the present invention is not limited thereto, and any change of expecting without creative work or replacement, all should be encompassed within protection scope of the present invention.Therefore, the protection domain that protection scope of the present invention should limit with claims is as the criterion.
Claims (11)
1. be applicable to a polyvinyl alcohol coating solution for short drying tunnel, it is characterized in that: the raw material comprising following number: 50-100 part distilled water, 8-20 part PVA particle, 5-20 part mixed solution and auxiliary agent 0.5-2 part; Described mixed solution comprises the azeotropic material of distilled water and 1-8 kind, and wherein distilled water compares 1:0.5-3 with azeotropic material mass; Described auxiliary agent comprises emulsifying agent and defoamer; Described polyvinyl alcohol coating solution making step is:
A, PVA particle is put in distilled water, stirring at normal temperature 1-3 hour, allows the abundant swelling of material, formed and stir liquid for the first time;
B, the first liquid that stirs is utilized water or steam heating, with 5-10 DEG C/min speed, be warming up to 80-100 DEG C, keep 1-5 hour, allow PVA particle fully be dissolved in water;
C, heating after stirring liquid lower the temperature, cooling method is Temperature fall or water-cooled cooling, and temperature, when 40-60 DEG C, adds mixed solution and auxiliary agent, continues to be stirred to less than 30 DEG C, stop stir;
D, omnidistance stirring velocity of preparing burden are between 60-150r/min.
2. a kind of polyvinyl alcohol coating solution being applicable to short drying tunnel according to claim 1, is characterized in that: described azeotropic material is ethanol, chloroethanol, n-propyl alcohol, Virahol, isopropylcarbinol, propyl carbinol, Pentyl alcohol and primary isoamyl alcohol.
3. a kind of polyvinyl alcohol coating solution being applicable to short drying tunnel according to claim 1, is characterized in that: described PVA particle is alcoholysis degree more than 95%, and volatile matter is less than 5%, the PVA particle that ash content is less than 0.5%.
4. a kind of polyvinyl alcohol coating solution being applicable to short drying tunnel according to claim 1, is characterized in that: described polyvinyl alcohol coating solution configures between rear staging life, within every 8-12 hour, must stir 1-2 hour with 60-150r/min speed.
5. a kind of polyvinyl alcohol coating solution being applicable to short drying tunnel according to claim 1, is characterized in that: in described polyvinyl alcohol coating solution, the mass concentration of PVA is between 5%-15%.
6. be applicable to a polyvinyl alcohol coating process for short drying tunnel, it is characterized in that: comprise the following steps:
A, preparation thickness are the basement membrane of 10-100 μm;
B, basement membrane is carried out corona treatment;
C, on the basement membrane through corona treatment, carry out primary coat glue, the coating dry weight of primary coat glue is 0.1-1.0g/ ㎡;
D, the basement membrane carried out after primary coat is carried out drying tunnel oven dry;
Cool after e, oven dry;
Be coated with polyvinyl alcohol solution above f, basement membrane after the cooling period, the coating dry weight of polyvinyl alcohol solution is 0.5-2.0g/ ㎡, and coating travelling speed is 100-180m/min;
G, carry out infrared drying;
Carry out short drying tunnel oven dry after h, infrared drying, drying time in 3-6 second, the preferred 100-130 DEG C of bake out temperature;
I, cooling;
J, to cut according to the requirement of product;
K, solidification, temperature is 40-60 DEG C, and the time is 12-48 hour.
7. a kind of polyvinyl alcohol coating process being applicable to short drying tunnel according to claim 6, is characterized in that: described coating method is that reverse kiss is coated with, and coating anilox roll adopts 70-110 line, and hole depth is at the ceramic anilox roller of 40-70 μm.
8. a kind of polyvinyl alcohol coating process being applicable to short drying tunnel according to claim 6, is characterized in that: described polyvinyl alcohol coating solution before coating must at 30-45 DEG C of left at ambient temperature 0.5-3 hour.
9. a kind of polyvinyl alcohol coating process being applicable to short drying tunnel according to claim 6, is characterized in that: during described coating, feeder system and coating roller palpus constant temperature are at 30-45 DEG C.
10. a kind of polyvinyl alcohol coating process being applicable to short drying tunnel according to claim 6, is characterized in that: described basement membrane is BiOriented Polypropylene Films or biaxially oriented polyester film.
11. a kind of polyvinyl alcohol coating processes being applicable to short drying tunnel according to claim 6, is characterized in that: described primer is water-based or solvent borne polyurethane glue, carries out infrared drying after water-based glue primary coat.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201510042806.1A CN104650669B (en) | 2015-01-28 | 2015-01-28 | A kind of polyvinyl alcohol coating solution and its coating process suitable for short drying tunnel |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201510042806.1A CN104650669B (en) | 2015-01-28 | 2015-01-28 | A kind of polyvinyl alcohol coating solution and its coating process suitable for short drying tunnel |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109621496A (en) * | 2018-11-26 | 2019-04-16 | 杭州健培科技有限公司 | The process that bubble generates is reduced in a kind of medical film coating process |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1128204A (en) * | 1995-10-30 | 1996-08-07 | 中国航天工业总公司八五一一研究所 | Water-resistant polyvinyl alcohol composite membrane and its manufacturing method |
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| CN109621496A (en) * | 2018-11-26 | 2019-04-16 | 杭州健培科技有限公司 | The process that bubble generates is reduced in a kind of medical film coating process |
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| CN104650669B (en) | 2017-06-06 |
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Denomination of invention: A polyvinyl alcohol coating solution suitable for short drying channels and its coating process Effective date of registration: 20231127 Granted publication date: 20170606 Pledgee: Zhejiang Tailong commercial bank Limited by Share Ltd. Quzhou Kecheng branch Pledgor: ZHEJIANG YIBAI PACKAGING MATERIALS CO.,LTD. Registration number: Y2023980067702 |