CN110157317A - A kind of PET base material back painting technology - Google Patents
A kind of PET base material back painting technology Download PDFInfo
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- CN110157317A CN110157317A CN201910469996.3A CN201910469996A CN110157317A CN 110157317 A CN110157317 A CN 110157317A CN 201910469996 A CN201910469996 A CN 201910469996A CN 110157317 A CN110157317 A CN 110157317A
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- 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
- B05D3/02—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 baking
- B05D3/0254—After-treatment
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- 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
- B05D7/00—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials
- B05D7/02—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials to macromolecular substances, e.g. rubber
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- 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
- B05D7/00—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials
- B05D7/24—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials for applying particular liquids or other fluent materials
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- 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
- C09D175/00—Coating compositions based on polyureas or polyurethanes; Coating compositions based on derivatives of such polymers
- C09D175/04—Polyurethanes
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- 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
- C09D5/00—Coating compositions, e.g. paints, varnishes or lacquers, characterised by their physical nature or the effects produced; Filling pastes
- C09D5/24—Electrically-conducting paints
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- 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
- C09D7/40—Additives
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- Chemical & Material Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Wood Science & Technology (AREA)
- Materials Engineering (AREA)
- Organic Chemistry (AREA)
- Paints Or Removers (AREA)
- Application Of Or Painting With Fluid Materials (AREA)
- Processes Of Treating Macromolecular Substances (AREA)
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Abstract
The invention discloses a kind of PET base materials to carry on the back painting technology, belong to film substrate back and applies technical field, it prepared including the dissolution of PVA resin, masking liquid, filtering, stand the processing steps such as defoaming, extrusion coated, drying, masking liquid configuration is the PVA resin solution for obtaining water, polyurethane resin stoste, surfactant, step (1), sequentially add in blender and stir, each component be added time interval be 5-10min, 30-50 DEG C, revolving speed is 40-60rpm, is made.The invention has the following advantages that the non-corrosive common stainless steel container of 1, masking liquid, equipment requirement are low；2, small (50g/ square meter) drying temperature of wet coating amount is low, and low energy consumption；3, masking liquid is free of poisonous and harmful substance, pollution-free, environmental-friendly；4, easy to operate.The present invention shows good comprehensive performance, and coating thickness is 4-4.5 microns, and viscosity is between 11-13cP, and surface tension is between 30-33dyn/cm, more stable, light transmittance is 64% or more, and mist degree is below 28%, translucency is good, sheet resistance < 10E11 Ω, antistatic.
Description
Technical field
It is carried on the back the present invention relates to film substrate and applies technical field, and in particular to a kind of PET base material back painting technology.
Background technique
PET film substrate back applies the back painting technology for mostly using gelatin solution to be base stock at present, and PET film substrate back applies
Mostly using gelatin solution is the back painting technology of base stock, and the back coating of function admirable should have following characteristic: back coating should be able to
It is firmly combined with PET strip base, in carbon ribbon winding, opening a book does not fall off and remove in print procedure；Back coating should have excellent
Good antistatic property, guarantee flying print under the conditions of do not generate electrostatic or electrostatic accumulation, there are also sufficiently high light transmittance and compared with
Low mist degree.Currently, to contain the toxic contact scar of organic solvent big more for common masking liquid, and it is inflammable and explosive using organic solvent, it can
Combustion, toxic and irritation, can be carcinogenic, the big drying temperature of coating weight requires highly energy-consuming high, and technical difficulty is big, is apparently easy to produce
Floating, the disadvantages such as wire drawing, and also gelatin is expensive.
The patent document of Publication No. CN108802873A discloses a kind of diffusion barrier and preparation method thereof, the diffusion
Film includes transparent PET substrate, the diffusion layer coated in transparent PET substrate upper surface and coated in transparent PET substrate lower surface
Back coating；Include diffusion particle in the diffusion layer, the diffusion particle the preparation method comprises the following steps: to silica flour and mica powder
Acid solution is added in mixture, is added to acceleration in ejector after mixing and handles, then dry, then shone by laser beam
It penetrates, obtains the diffusion particle；Containing the particle that prevents adhesion in the back coating, the particle that prevents adhesion includes above-mentioned expansion
Shot and at least one inorganic particulate composition.
The patent document of Publication No. CN109504227A discloses a kind of producer of printer barcode ribbon back coating
Method belongs to thermal transfer technology field.Technical solution of the present invention main points are as follows: coated coating of supporting or opposing, which is consolidated in block, is added its quality 2-5
Times mixed solvent, in 40-60 DEG C, be stirred continuously under conditions of be configured to back coating feed liquid, then back coating feed liquid is coated on
Mixed solvent is blown away after drying tunnel, and applies back in the water vapour that drying tunnel exit is passed through 100-150 DEG C in the back side of barcode ribbon
Layered material liquid crosslinking curing completes the production of barcode ribbon back coating.
Above two back coating method can satisfy certain requirement, big but there are mist degrees, and sheet resistance is big equal scarce
It falls into, is not able to satisfy the use demand of antistatic, coating weight is big, is further improved.
Summary of the invention
To overcome drawbacks described above, the present invention provides a kind of PET base material back painting technology.
In order to solve the above technical problems, the technical solution adopted by the present invention are as follows:
A kind of PET base material back painting technology, the following steps are included: the dissolution of (1) PVA resin, (2) masking liquid are prepared, (3) filtering, (4)
Standing defoaming, (6) extrusion coated, (6) are dry, in step (2) the masking liquid preparation, the parts by weight of each ingredient of masking liquid are as follows:
The PVA resin that 540-560 parts of water, 272-288 parts of polyurethane resin stoste, 10-20 parts of surfactant, step (1) obtain is molten
193-207 parts of liquid.
Preferably, step (1) the PVA resin dissolution: the non-granular solids of PVA resin are used, are needed using 80-100 DEG C
Water dissolution, obtain mass fraction be 6% PVA resin solution.
Preferably, step (2) masking liquid is prepared: water, polyurethane resin stoste, surfactant, step (1) are obtained
PVA resin solution, sequentially add in blender and stir, each component be added time interval be 5-10min, 30-50 DEG C, revolving speed
For 40-60rpm, masking liquid is obtained.
Preferably, the step (4) stands defoaming: the filtrate that step (3) is obtained stands 30min under the conditions of 40 DEG C,
Obtain feed liquid.
Preferably, step (5) extrusion coated: the feed liquid that step (4) obtains is applied on substrate, and dry-coated amount is 4-
4.5g/ square meter, with a thickness of 4-4.5 microns.
The beneficial effects of the present invention are: the present invention is using PVA resin and polyurethane resin as major ingredient, and add surfactant
It is compound, it stirs, filtering, feed liquid is made after standing defoaming, has and increases the service performances such as frictional force, Anti-curling.The water of PVA resin
Solution has good cementability and film forming, and polyurethane resin stoste has good adhesiveness, toughness and wearability.Surface
Activating agent model selects fs3100, and the surfactant fs3100 gross area of 2g is 4-6 microns, writes the surface energy for reducing water, increases
Strong dispersion effect eliminates bubble, reduces sheet resistance.Masking liquid back is coated in substrate surface, increases the usability such as frictional force, Anti-curling
Energy.PVA hard resin is first dissolved into clear viscous liquid by the present invention, and masking liquid is prepared, control temperature 30-50 DEG C it
Between, it reduces back and applies mist degree, increase light transmittance.Defoaming is stood, temperature control is 40 DEG C, improves light transmittance.Dry, removal is applied to
The moisture of feed liquid on substrate completes the good bond of feed liquid and substrate.The invention has the following advantages that 1, masking liquid is non-corrosive general
Logical rustless steel container, equipment requirement are low；2, small (50g/ square meter) drying temperature of wet coating amount is low, and low energy consumption；3, masking liquid is free of
Poisonous and harmful substance, it is pollution-free, it is environmental-friendly；4, easy to operate.
The present invention shows good comprehensive performance, extrusion coated with a thickness of 4-4.5 microns, viscosity between 11-13cP,
Surface tension is more stable between 30-33dyn/cm, light transmittance 64% or more, mist degree 28% hereinafter, translucency is good, table
Surface resistance < 10E11 Ω, antistatic.
Specific embodiment
In order to make the object, technical scheme and advantages of the embodiment of the invention clearer, below to the skill of the embodiment of the present invention
Art scheme is clearly and completely described.Obviously, described embodiment is a part of the embodiments of the present invention, rather than complete
The embodiment in portion.Based on described the embodiment of the present invention, those of ordinary skill in the art's every other implementation obtained
Example, shall fall within the protection scope of the present invention.
Embodiment 1
A kind of PET base material back painting technology, the following steps are included:
(1) resin dissolves: the non-granular solids of PVA resin are used, needs to dissolve using 80 DEG C of water, obtains PVA resin solution,
The mass fraction of PVA resin solution is 6%；
(2) masking liquid is prepared: the PVA resin solution that water, polyurethane resin stoste, surfactant, step (1) are obtained, successively
It is added in blender and stirs, the time interval that each component is added is 5min, 30 DEG C, revolving speed 40rpm, masking liquid is obtained, in masking liquid
The parts by weight of each ingredient are as follows: 540 parts of water, 272 parts of polyurethane resin stoste, 10 parts of surfactant, step (1) obtain
193 parts of PVA resin solution；
(3) filter: the masking liquid that step (2) is obtained filters, and removes impurity particle, and the mesh number of strainer is 5 microns；
(4) stand defoaming: the filtrate that step (3) is obtained stands 30min, obtains feed liquid under the conditions of 40 DEG C；
(5) extrusion coated: the feed liquid that step (4) obtains is applied on substrate, and dry-coated amount is 4-4.5g/ square meter, with a thickness of 4-
4.5 micron；
(6) dry: it is 70 DEG C that the substrate that step (5) obtains, which is placed in baking oven dry, dry temperature, time 3min.
Embodiment 2
A kind of PET base material back painting technology, the following steps are included:
(1) resin dissolves: the non-granular solids of PVA resin are used, needs to dissolve using 83 DEG C of water, obtains PVA resin solution,
The mass fraction of PVA resin solution is 6%；
(2) masking liquid is prepared: the PVA resin solution that water, polyurethane resin stoste, surfactant, step (1) are obtained, successively
It is added in blender and stirs, the time interval that each component is added is 6min, 33 DEG C, revolving speed 43rpm, masking liquid is obtained, in masking liquid
The parts by weight of each ingredient are as follows: 543 parts of water, 274 parts of polyurethane resin stoste, 12 parts of surfactant, step (1) obtain
195 parts of PVA resin solution；
(3) filter: the masking liquid that step (2) is obtained filters, and removes impurity particle, and the mesh number of strainer is 5 microns；
(4) stand defoaming: the filtrate that step (3) is obtained stands 30min, obtains feed liquid under the conditions of 40 DEG C；
(5) extrusion coated: the feed liquid that step (4) obtains is applied on substrate, and dry-coated amount is 4-4.5g/ square meter, with a thickness of 4-
4.5 micron；
(6) dry: it is 72 DEG C that the substrate that step (5) obtains, which is placed in baking oven dry, dry temperature, time 4min.
Embodiment 3
A kind of PET base material back painting technology, the following steps are included:
(1) resin dissolves: the non-granular solids of PVA resin are used, needs to dissolve using 85 DEG C of water, obtains PVA resin solution,
The mass fraction of PVA resin solution is 6%；
(2) masking liquid is prepared: the PVA resin solution that water, polyurethane resin stoste, surfactant, step (1) are obtained, successively
It is added in blender and stirs, the time interval that each component is added is 7min, 35 DEG C, revolving speed 45rpm, masking liquid is obtained, in masking liquid
The parts by weight of each ingredient are as follows: 545 parts of water, 275 parts of polyurethane resin stoste, 13 parts of surfactant, step (1) obtain
198 parts of PVA resin solution；
(3) filter: the masking liquid that step (2) is obtained filters, and removes impurity particle, and the mesh number of strainer is 5 microns；
(4) stand defoaming: the filtrate that step (3) is obtained stands 30min, obtains feed liquid under the conditions of 40 DEG C；
(5) extrusion coated: the feed liquid that step (4) obtains is applied on substrate, and dry-coated amount is 4-4.5g/ square meter, with a thickness of 4-
4.5 micron；
(6) dry: it is 75 DEG C that the substrate that step (5) obtains, which is placed in baking oven dry, dry temperature, time 4min.
Embodiment 4
A kind of PET base material back painting technology, the following steps are included:
(1) resin dissolves: the non-granular solids of PVA resin are used, needs to dissolve using 86 DEG C of water, obtains PVA resin solution,
The mass fraction of PVA resin solution is 6%；
(2) masking liquid is prepared: the PVA resin solution that water, polyurethane resin stoste, surfactant, step (1) are obtained, successively
It is added in blender and stirs, the time interval that each component is added is 7min, 40 DEG C, revolving speed 48rpm, masking liquid is obtained, in masking liquid
The parts by weight of each ingredient are as follows: 548 parts of water, 278 parts of polyurethane resin stoste, 14 parts of surfactant, step (1) obtain
199 parts of PVA resin solution；
(3) filter: the masking liquid that step (2) is obtained filters, and removes impurity particle, and the mesh number of strainer is 5 microns；
(4) stand defoaming: the filtrate that step (3) is obtained stands 30min, obtains feed liquid under the conditions of 40 DEG C；
(5) extrusion coated: the feed liquid that step (4) obtains is applied on substrate, and dry-coated amount is 4-4.5g/ square meter, with a thickness of 4-
4.5 micron；
(6) dry: it is 70-85 DEG C that the substrate that step (5) obtains, which is placed in baking oven dry, dry temperature, time 4min.
Embodiment 5
A kind of PET base material back painting technology, the following steps are included:
(1) resin dissolves: the non-granular solids of PVA resin are used, needs to dissolve using 90 DEG C of water, obtains PVA resin solution,
The mass fraction of PVA resin solution is 6%；
(2) masking liquid is prepared: the PVA resin solution that water, polyurethane resin stoste, surfactant, step (1) are obtained, successively
It is added in blender and stirs, the time interval that each component is added is 8min, 40 DEG C, revolving speed 50rpm, masking liquid is obtained, in masking liquid
The parts by weight of each ingredient are as follows: the PVA that 550 parts of water, 280 parts of polyurethane resin stoste, surfactant 15, step (1) obtain
200 parts of resin solution；
(3) filter: the masking liquid that step (2) is obtained filters, and removes impurity particle, and the mesh number of strainer is 5 microns；
(4) stand defoaming: the filtrate that step (3) is obtained stands 30min, obtains feed liquid under the conditions of 40 DEG C；
(5) extrusion coated: the feed liquid that step (4) obtains is applied on substrate, and dry-coated amount is 4-4.5g/ square meter, with a thickness of 4-
4.5 micron；
(6) dry: it is 80 DEG C that the substrate that step (5) obtains, which is placed in baking oven dry, dry temperature, time 5min.
Embodiment 6
A kind of PET base material back painting technology, the following steps are included:
(1) resin dissolves: the non-granular solids of PVA resin are used, needs to dissolve using 95 DEG C of water, obtains PVA resin solution,
The mass fraction of PVA resin solution is 6%；
(2) masking liquid is prepared: the PVA resin solution that water, polyurethane resin stoste, surfactant, step (1) are obtained, successively
It is added in blender and stirs, the time interval that each component is added is 9min, 45 DEG C, revolving speed 55rpm, masking liquid is obtained, in masking liquid
The parts by weight of each ingredient are as follows: 553 parts of water, 282 parts of polyurethane resin stoste, 16 parts of surfactant, step (1) obtain
202 parts of PVA resin solution；
(3) filter: the masking liquid that step (2) is obtained filters, and removes impurity particle, and the mesh number of strainer is 5 microns；
(4) stand defoaming: the filtrate that step (3) is obtained stands 30min, obtains feed liquid under the conditions of 40 DEG C；
(5) extrusion coated: the feed liquid that step (4) obtains is applied on substrate, and dry-coated amount is 4-4.5g/ square meter, with a thickness of 4-
4.5 micron；
(6) dry: it is 80 DEG C that the substrate that step (5) obtains, which is placed in baking oven dry, dry temperature, time 6min.
Embodiment 7
A kind of PET base material back painting technology, the following steps are included:
(1) resin dissolves: the non-granular solids of PVA resin are used, needs to dissolve using 98 DEG C of water, obtains PVA resin solution,
The mass fraction of PVA resin solution is 6%；
(2) masking liquid is prepared: the PVA resin solution that water, polyurethane resin stoste, surfactant, step (1) are obtained, successively
It is added in blender and stirs, the time interval that each component is added is 9min, 48 DEG C, revolving speed 55rpm, masking liquid is obtained, in masking liquid
The parts by weight of each ingredient are as follows: 556 parts of water, 285 parts of polyurethane resin stoste, 18 parts of surfactant, step (1) obtain
205 parts of PVA resin solution；
(3) filter: the masking liquid that step (2) is obtained filters, and removes impurity particle, and the mesh number of strainer is 5 microns；
(4) stand defoaming: the filtrate that step (3) is obtained stands 30min, obtains feed liquid under the conditions of 40 DEG C；
(5) extrusion coated: the feed liquid that step (4) obtains is applied on substrate, and dry-coated amount is 4-4.5g/ square meter, with a thickness of 4-
4.5 micron；
(6) dry: it is 82 DEG C that the substrate that step (5) obtains, which is placed in baking oven dry, dry temperature, time 7min.
Embodiment 8
A kind of PET base material back painting technology, the following steps are included:
(1) resin dissolves: the non-granular solids of PVA resin are used, needs to dissolve using 100 DEG C of water, obtains PVA resin solution,
The mass fraction of PVA resin solution is 6%；
(2) masking liquid is prepared: the PVA resin solution that water, polyurethane resin stoste, surfactant, step (1) are obtained, successively
It is added in blender and stirs, the time interval that each component is added is 10min, and 50 DEG C, revolving speed 60rpm obtains masking liquid, masking liquid
In each ingredient parts by weight are as follows: 560 parts of water, 288 parts of polyurethane resin stoste, 20 parts of surfactant, step (1) obtain
207 parts of PVA resin solution；
(3) filter: the masking liquid that step (2) is obtained filters, and removes impurity particle, and the mesh number of strainer is 5 microns；
(4) stand defoaming: the filtrate that step (3) is obtained stands 30min, obtains feed liquid under the conditions of 40 DEG C；
(5) extrusion coated: the feed liquid that step (4) obtains is applied on substrate, and dry-coated amount is 4-4.5g/ square meter, with a thickness of 4-
4.5 micron；
(6) dry: it is 85 DEG C that the substrate that step (5) obtains, which is placed in baking oven dry, dry temperature, time 8min.
Embodiment 9
A kind of PET base material back painting technology, the following steps are included:
(1) resin dissolves: the non-granular solids of PVA resin are used, needs to dissolve using 100 DEG C of water, obtains PVA resin solution,
The mass fraction of PVA resin solution is 6%；
(2) masking liquid is prepared: PVA resin solution that water, polyurethane resin stoste, surfactant, step (1) are obtained, nucleation
Agent 993, calcium stearate, sequentially add in blender and stir, and the time interval that each component is added is 10min, and 50 DEG C, revolving speed is
60rpm obtains masking liquid, the parts by weight of each ingredient in masking liquid are as follows: 560 parts of water, 288 parts of polyurethane resin stoste, surface-active
Obtain 207 parts of PVA resin solution of 20 parts of agent, step (1), 993 3 parts of nucleating agent, 2 parts of calcium stearate；
(3) filter: the masking liquid that step (2) is obtained filters, and removes impurity particle, and the mesh number of strainer is 5 microns；
(4) stand defoaming: the filtrate that step (3) is obtained stands 30min, obtains feed liquid under the conditions of 40 DEG C；
(5) extrusion coated: the feed liquid that step (4) obtains is applied on substrate, and dry-coated amount is 4-4.5g/ square meter, with a thickness of 4-
4.5 micron；
(6) dry: it is 85 DEG C that the substrate that step (5) obtains, which is placed in baking oven dry, dry temperature, time 8min.
In embodiment 1-9, surfactant model selects fs3100, mass fraction 5%, the surfactant of 2g
Fs3100 gross area is 4-6 microns.
Nucleating agent is added in embodiment 9, model 993 is selected from Guangzhou Chuan Jinxin Chemical Industry Science Co., Ltd, the nucleating agent
It can promote PVA resin and crystalline polyurethane resin, the structure of crystal grain is made fine, original homogeneous nucleation is made to become out-phase
Nucleation increases the number of nucleus in crystallizing system, increases the quantity of crystallite, and spherocrystal number is reduced, so that crystalline size be made to become
Carefully, the transparency of resin improves.Calcium stearate and nucleating agent act synergistically, and dispersion more evenly, improves the stability of system, improve
Nucleation efficiencies.
In 1-9 of the embodiment of the present invention, the method for step (5) extrusion coated is: the feed liquid that step (4) obtains is placed in extruding
In formula coating machine, interior is vacuumized, holding vacuum degree be -0.10 ~ -0.08MPa, 30-40 DEG C of temperature, under the speed of 3m/min
Extrusion coated is carried out, freeze-day with constant temperature 4h under conditions of the substrate after coating is placed in 90 DEG C, controlling dry-coated amount is 4-4.5g/ square meter,
With a thickness of 4-4.5 microns.
During traditional extrusion coated, the mobility of feed liquid be influenced by temperature it is larger, and along substrate width
The coating in direction is unevenly distributed, so that open defect is more, rejection rate is higher.Moreover, feed liquid is during transfer
Certain bubble can be carried, this will cause be formed by feed liquid and substrate adhesiveness it is lower.And extruding of the invention is used to apply
Cloth method controls vacuum degree and temperature, substrate is dried after coating, can carry out even spread to substrate, effectively
After solving the coating of previous coating method, coating is unevenly distributed as problem on substrate, submits the adhesive force between coating and substrate,
Improve product qualification rate.
Comparative example 1
This comparative example provides a kind of PET base material back painting technology, and be with the difference of embodiment 1: this comparative example lacks surface-active
Agent.
Comparative example 2
This comparative example provides a kind of PET base material back painting technology, and be with the difference of embodiment 1: this comparative example step (2) masking liquid is matched
The temperature setting of system is 20 DEG C.
Comparative example 3
This comparative example provides a kind of PET base material back painting technology, is with the difference of embodiment 1: in this comparative example step (2) masking liquid
The parts by weight of each ingredient are as follows: the PVA that 540 parts of water, 260 parts of polyurethane resin stoste, 8 parts of surfactant, step (1) obtain
180 parts of resin solution.
Comparative example 4
This comparative example provides a kind of PET base material back painting technology, and be with the difference of embodiment 1: this comparative example lacks step (4).
Test result
1 embodiment 1-8 of table and comparative example 1-4 masking liquid and backing layer the performance test results
In conjunction with table 1, it can be seen that 1-8 of the embodiment of the present invention shows good comprehensive performance, and coating thickness is 4-4.5 microns,
Rotational viscometer tested viscosity is between 11-13cP, and surface tension is more stable between 30-33dyn/cm, and light transmittance exists
64% or more, mist degree 28% hereinafter, translucency is good, implemented by sheet resistance tester test surfaces resistance < 10E11 Ω, antistatic
Example 9 adds nucleating agent and calcium stearate, the light transmittance of material are optimal.Comparative example 1 lacks surfactant, light transmission and prevents quiet
Electrical property is decreased obviously, and comparative example 2 changes the temperature that masking liquid is prepared, and comparative example 3 changes the ratio of component in masking liquid, comparative example 4
Standing defoaming is not carried out, and the performance of material is declined, and illustrates that inventive formulation and technique suitability are good.
Finally, it is stated that the above examples are only used to illustrate the technical scheme of the present invention and are not limiting, this field is common
Other modifications or equivalent replacement that technical staff makes technical solution of the present invention, without departing from technical solution of the present invention
Spirit and scope, be intended to be within the scope of the claims of the invention.
Claims (5)
1. a kind of PET base material carries on the back painting technology, the following steps are included: the dissolution of (1) PVA resin, (2) masking liquid are prepared, (3) are filtered,
(4) defoaming, (6) extrusion coated, (6) drying are stood, it is characterised in that: during step (2) masking liquid is prepared, each ingredient of masking liquid
Parts by weight are as follows: 540-560 parts of water, 272-288 parts of polyurethane resin stoste, 10-20 parts of surfactant, step (1)
193-207 parts of the PVA resin solution arrived.
2. a kind of PET base material as described in claim 1 carries on the back painting technology, it is characterised in that: step (1) the PVA resin is molten
Solution: using the non-granular solids of PVA resin, needs to dissolve using 80-100 DEG C of water, it is molten to obtain the PVA resin that mass fraction is 6%
Liquid.
3. a kind of PET base material as claimed in claim 2 carries on the back painting technology, it is characterised in that: step (2) masking liquid is prepared: will
The PVA resin solution that water, polyurethane resin stoste, surfactant, step (1) obtain, sequentially adds in blender and stirs, respectively
The time interval that component is added is 5-10min, and 30-50 DEG C, revolving speed 40-60rpm obtains masking liquid.
4. a kind of PET base material as claimed in claim 4 carries on the back painting technology, it is characterised in that: the step (4) stands defoaming: will
The filtrate that step (3) obtains stands 30min, obtains feed liquid under the conditions of 40 DEG C.
5. a kind of PET base material as claimed in claim 5 carries on the back painting technology, it is characterised in that: step (5) extrusion coated: will
The feed liquid that step (4) obtains is applied on substrate, and dry-coated amount is 4-4.5g/ square meter, with a thickness of 4-4.5 microns.
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| CN201910469996.3A CN110157317B (en) | 2019-05-31 | 2019-05-31 | PET substrate back coating process |
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| CN201910469996.3A CN110157317B (en) | 2019-05-31 | 2019-05-31 | PET substrate back coating process |
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| CN110157317B CN110157317B (en) | 2021-01-05 |
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106085272A (en) * | 2016-08-19 | 2016-11-09 | 上海谷奇数码科技有限公司 | Heat foamable transfer membrane |
| CN106965586A (en) * | 2017-03-23 | 2017-07-21 | 江苏耐斯数码科技股份有限公司 | Medical blue laser printing film and preparation method |
| CN108912873A (en) * | 2017-04-13 | 2018-11-30 | 江苏华信新材料股份有限公司 | A kind of adaptation ink-jet and the multifunctional membrane coating fluid of laser printing and preparation method thereof |
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2019
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106085272A (en) * | 2016-08-19 | 2016-11-09 | 上海谷奇数码科技有限公司 | Heat foamable transfer membrane |
| CN106965586A (en) * | 2017-03-23 | 2017-07-21 | 江苏耐斯数码科技股份有限公司 | Medical blue laser printing film and preparation method |
| CN108912873A (en) * | 2017-04-13 | 2018-11-30 | 江苏华信新材料股份有限公司 | A kind of adaptation ink-jet and the multifunctional membrane coating fluid of laser printing and preparation method thereof |
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| CN110157317B (en) | 2021-01-05 |
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