CN104723626B - A kind of household electrical appliances iron plastic composite materials and preparation method - Google Patents
A kind of household electrical appliances iron plastic composite materials and preparation method Download PDFInfo
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Abstract
The present invention relates to a kind of household electrical appliances iron plastic composite materials and preparation method thereof, the composite structure is followed successively by from top to bottom：Hardened wear-resistant layer, BOPET film substrate layer, chemically modified layer, printing layer, UV structures wire drawing layer, aluminium coated, priming coat, modified PE layer, adhesion promoting layer, polyester layer, iron plate base material；Each layer is mutually combined closely.The iron plastic composite materials by Surface hardened layer, printing, wire drawing, aluminize, form dazzling gorgeous, imitative metal wire-drawing degree is fine, hardness is high, practical wear-resisting outward appearance, the hardened layer that polycarbonate-based polyurethane is formed with polyether polyurethane can reach the hardness of more than 3H, while keeping preferable pliability beneficial to the processing characteristics of film, bigger space be provided to the selection of film substrate thickness；And fitted with iron plate hot pressing merely through hot melt modified resin, preparation method is environmentally friendly, simple to operate, cost-effective.
Description
Technical field
The present invention relates to a kind of iron plastic composite materials, the iron modeling composite wood that a kind of home appliance surface is used is related specifically to
Material.
Background technology
Household electrical appliances are not only a machine by covered metal-back, and it is even more our life, families, or even for remembering
Point.We lie in the change that household electrical appliances bring to quality of life, more lie in the shadow that we are lived and are remembered under its mode of appearance
Ring.Sometimes, during we are even ready to change for a oneself favorite metal wire-drawing texture double-door refrigerator own home
Finishing layout.In the minds of majority, the materialization of the colourful outward appearance of household electrical appliances into oneself unique personality and grade is showed.Mesh
Preceding in the market producer is many for the publicity of household electrical appliances functions, but does not have what too big difference in fact, now to the choosing of household electrical appliances
Whether the standard of selecting is concentrated mainly on the outward appearance of the household that can preferably arrange in pairs or groups.The artistry such as LG " Sheng Tangwen ", beautiful " Chinese feature "
The appearance of white domestic appliances product, meets the potential demand that consumer builds harmonious household to overall household electrical appliances, will lead art
The development of household electrical appliances.
The life idea that people pursue high-quality has penetrated into household electric appliances, and conventional black is rough, white dull household electrical appliances
Outward appearance can not meet the demand of people, and precoated steel sheet household electrical appliances beautiful in colour, practical function arise at the historic moment.Household electrical appliances precoated steel sheet
It is that will be covered on steel surface by the organic polymer film after printing, gold-plated, wire drawing, radium-shine, hardening, it has physical beauty
See, the advantages of beautiful in colour, intensity is high, corrosion resistance is good, machine-shaping facilitates.
But the tack coat that existing overlay film iron plate is used is generally solvent-based thermal activated form adhesive, including PVC glue, single group
The polyurethane of part, polyurethane of double-component etc., need addition solvent diluent, curing agent, colouring agent etc., then in adhesion process
By high-temperature baking, substantial amounts of pernicious gas is produced.And by the iron plate of this mode overlay film, in initial bonding strength very
It is low, it is necessary to 50 degree of constant temperature are solidified, largely consume the energy.In addition to secondary, because adhesive is liquid, coating process is easy to
Produce bubble, and have dissolvent residual influences the feature of environmental protection of household electrical appliances in the composite.
In addition, the film layer of existing overlay film iron plate is very simple, the hardness of film layer is relatively low, it is impossible to meet present household appliances
To the demand of appearance material.It is high the invention provides a kind of hardness based on drawbacks described above, imitate metal wire-drawing degree finely, without
Bonding, it is only necessary to the household electrical appliances that hot pressing can just be molded iron plastic composite materials.
The content of the invention
To solve the above problems, the present invention proposes a kind of household electrical appliances iron plastic composite materials and preparation method thereof.
The iron plastic composite materials by Surface hardened layer, printing, wire drawing, aluminize, form dazzling gorgeous, imitate metal wire-drawing journey
Degree is fine, and hardness is high, practical wear-resisting outward appearance, and is fitted with iron plate hot pressing merely through hot melt modified resin, preparation method ring
Protect, it is simple to operate, cost-effective.
With being hot pressed into sections plastic composite materials, the composite structure is from top to bottom successively for household electrical appliances involved in the present invention
For：Hardened wear-resistant layer, BOPET film substrate layer, chemically modified layer, printing layer, UV structures wire drawing layer, aluminium coated, priming coat, change
PE layers of property, adhesion promoting layer, polyester layer, iron plate base material；Each layer is mutually combined closely.
Wherein, hardened wear-resistant layer is used to improve the case hardness of iron plastic composite materials, prevents surface scratch；Chemistry changes
Property layer mainly for the protection of printing ink layer, the Main Function that UV structures wire drawing layer rises is exactly that metal wire-drawing structure is presented, with
Aluminium coated shows metal-like together；Modified PE layer, adhesion promoting layer, the combination of polyester layer make iron plastic composite materials of the invention only
Needing hot pressing can just combine closely on the surface of iron plate base material, and need not rely on binding material.
Wherein, the BOPET film is transparent biaxial tension pet film, and thickness is generally 25
~30 microns, be prefabricated base material.
Wherein, the hardened wear-resistant layer be polycarbonate-based polyurethane, polyether polyurethane, polycarbodiimide crosslinkers,
Acrylate levelling agent, polyether silicone class wetting agent, water mix emulsion and are made, and the combination of mentioned component is led at other
It is often used in obtaining hardened wear-resistant layer in domain, such as ground pavement, the present invention can use for reference the raw material used by prior art arrangement,
But it is film in view of base material of the invention, therefore by above-mentioned raw material, through sided corona treatment, high temperature after being coated with using the full width of intaglio plate
(130-150 DEG C) drying is obtained.
Specifically, the hardened wear-resistant layer is that the polycarbonate-based polyurethane of 10-30%, 10-30% polyethers are birdsed of the same feather flock together ammonia
Ester mixes in proportion, and the speed for turning (preferably 300 turns) with 200-500 in agitator stirs 1-10min (preferably 5min),
Acrylate levelling agent, polyether silicone class wetting agent are added after adding water dilution, continues to stir 1-10min (preferably
3min), polycarbodiimide crosslinkers are eventually adding.Above-mentioned emulsion is imported into the full width coating machine glue groove of intaglio plate, preceding corona machine is opened strong
Degree is set as 2-8KVA (preferably 5.5KVA), and speed sets 20-40m/min (preferably 30m/min), and baking oven is dry using steam
Dry temperature is 100-150 DEG C (preferably 120 DEG C), forms hardened wear-resistant layer；
The chemically modified layer is two kinds of acrylic acid copolymer layers；
Specifically, the chemically modified layer be from Tg be 50~70 DEG C and 10~-20 DEG C of two kinds of acrylic emulsions and
Ethanol, water mixing, wherein, the weight ratio that Tg acrylic emulsions (Tg is 50~70 DEG C) high account for total system is 0.8%~1.8%,
Low Tg acrylic emulsions (Tg is 10~-20 DEG C) account for 0.3%~1.0%, and ethanol accounts for 25%%~34%；Remaining is water；Then
Mixed liquor is coated the lower surface of BOPET base materials, coating grammes per square metre is 0.01~0.1g/m2It is made.
The ink of the printing layer uses dual-component polyurethane class high temperature resistant dye ink；Described bi-component refers to：A groups
Subpackage contains polyalcohol, diamine or monoamine or polyamine, C2-10 diol chain-extension agents, inorganic filler, additive, cross-linking catalyst
Agent；B component is 840-2100, the NCO- blocked polyurethanes performed polymer of NCO degrees of functionality 2-4, inorganic filler, addition comprising molecular weight
Agent.This is conventional high temperature resistant dyestuff, and the thickness of the printing layer is at 0.5~1 micron.
In addition, the main component of the UV structures wire drawing layer is UV resin beds；The thickness of the UV structures wire drawing layer is general
It it is 10~18 microns, UV resins are a kind of conventional resins of association area, usually by epoxy acrylic ester prepolymer, aliphatic
Polyurethane acrylate prepolymer, monomer, initiator, levelling agent, solvent composition.Specifically, UV structures of the present invention
Epoxy acrylate is the epoxy diacrylate of 2 functions in wire drawing layer, and the weight ratio for accounting for total system is 5%~10%；Fat
Race's polyurethane acrylate prepolymer is 4 functional aliphatic's urethane diacrylates, accounts for the 20%~30% of total system；Monomer
For simple function mixes with multifunctional, such as 5%~8% methoxy poly (ethylene glycol) monomethacrylates coordinate 7%~12%
Trimethylolpropane trimethacrylate；Initiator is 2,4,6- trimethyl benzoyl diphenyl base phosphine oxides or 2- methyl isophthalic acids-(4-
Methyl mercapto) phenyl -2- morpholinyl propyl -1- ketone or 1- hydroxyls-cyclohexyl-phenyl ketone, one of which or two or more combinations,
Account for total system 0.2%~2.5%；Levelling agent is polyether silicones class, accounts for gross weight 0.1%~0.5%；Solvent is ethanol, acetic acid
Ethyl ester, butyl acetate mixture.
Its threaded configuration be by the way that oven drying, ultra violet lamp after coating UV resin be semi-harden, roller extrusion structure into
Type, ultra violet lamp hardening process are realized；
The aluminium coated is aluminium atom sedimentary；
The aluminium coated is in high vacuum conditions, metallic aluminium fusion and gasification to be made with the heating of resistance, high frequency or electron beam,
Aluminium lamination is formed after threaded configuration layer absorption, light refraction, reflection angle can be made different, form wire drawing metal-like, general thickness
The priming coat is EAA layers (ethylene-acrylic acid copolymer layer)；
The priming coat is that by the EAA aqueous solution, wherein solids content accounts for 0.04%~0.5%, coating dry weight 0.002~
0.008g/m2, drying temperature is 90 DEG C；
The modified PE layer is acrylic graft-modified polyvinyl resin, and wherein acrylic acid content is 8%~12%, overall
It is long chain type macromolecule.The softening point of the modified PE is more than 100 DEG C, and MI=4.5~15g/10min (190 DEG C) is general thick
Degree is set to 15~30 microns；
The adhesion promoting layer is mainly thermoplastic urethane layers, and the polyurethane resin can combine closely in the case of hot pressing
To iron-based plate surface；Described adhesion promoting layer is main to be mixed by thermally activated dispersions of polyurethanes, adhesion promoter, ethanol, water
Form, wherein thermally activated dispersions of polyurethanes accounts for the 5%~35% of total system；Adhesion promoter is hydroxyl macromolecule material
Material, molecular weight is 1000~10000, and quality accounting is 1%~10%；Ethanol is cosolvent, and use quality is the 5% of gross weight
~20%；General coating dry weight is 0.3~2.0g/m2。
Preferably, the thickness of the BOPET film is 25~30 microns.
Preferably, two kinds of acrylic emulsions that the chemically modified layer is selected are respectively 8%Tg=65 DEG C, 0.5%Tg=-
10℃。
The printing layer ink is from colors such as transparent yellow, transparent red, transparent greens.
The iron plate base material that the present invention is used is the one kind in tin plating, zinc-plated, chromium plating, plain sheet, and prefabricated in vain on surface
The gross thickness of color polyester layer, general iron plate and polyester layer is in 0.25~0.8mm.The polyester layer is this area prefabricated on iron plate
Conventional polyester, its Main Function is as follows：1. the antirust function of iron plate is strengthened；2. increase color bottom, cover the flaw of steel plate
Defect, makes the unification of holding color after overlay film, typically uses main component molten for the polyester of active polyester resin, pigment, curing agent
Liquid mixture, using intaglio plate rolling method, coil of strip is coated by polyester liquid, and then drying and moulding is obtained, prefabricated on iron plate surface
Polyester layer is technology commonly used in the art.
Particularly, the present invention also provides the preparation method of above-mentioned iron plastic composite materials.
Preparation method of the present invention, comprises the following steps：
1) by transparent BOPET film biaxial tension, thickness is obtained for 25~30 microns is pre- prepared BOPET substrate layers；
2) by polycarbonate-based polyurethane, polyether polyurethane, polycarbodiimide crosslinkers, acrylate levelling agent, poly-
Ether type siloxane wetting agent, water mix emulsion, in the upper surface of BOPET substrate layers using the full width coating of intaglio plate, Ran Hougao
Temperature is dried, and thickness is 5~8 microns, obtains hardened wear-resistant layer；
3) acrylic acid solution is configured to chemical modification liquid, is added to the first glue groove of intaglio press, open preceding corona machine
Intensity settings are 2-10KVA (preferably 5.0KVA), and speed sets 50-150m/min (preferably 120m/min), and baking oven uses steam
Drying temperature is 100 DEG C, and the PET faces for coating above-mentioned base material using smooth roll form chemically modified layer；Behind intaglio press
Using gravure printing roller, after glue groove is printed using double-component high temperature ink, printing layer is formed in modified layer surface, obtain THIN COMPOSITE
Film；
4) by epoxy acrylic ester prepolymer 5-10%, aliphatic urethane acrylate prepolymer 5-10%, monomer 15-
25%th, initiator 0.5-2%, levelling agent 0.05-0.5%, remaining be solvent mixing, be added in UV forming machine glue grooves, will be upper
Composite membrane is stated using intaglio plate gluing mode, by oven drying, by a steel for being carved with wire drawing lines after first order UV solidifications
Roller is extruded, and is finally entered second level UV curing moldings and is formed UV structures wire drawing layer, and the composite membrane feeding after winding is vacuum aluminum-coated
Machine is aluminized, and forms aluminium coated；
5) by above-mentioned laminated film feeding curtain coating equipment complex, silane coupling agent is coated with the face of aluminizing using smooth roll；After drying
Compound position is delivered to, extruder absorbing propenoic acid graft modification PE particles enter cavity, squeezed by die head in 260 DEG C of heating and meltings
Go out and coat priming coat, die head be equipped with 3~10 layers of screen pack, aperture be 30~100 mesh, by 20~30 DEG C of chill rolls with squeeze
Pressure roller, forms modified PE layer, and its extruded velocity is 30~200MPM；Layer material will be viscosified after corona using light roller mode to be coated with
Adhesion promoting layer is formed in PE faces, it is rolling rear standby；
6) iron plate of prefabricated polyester layer is combined by hot pressing equipment for coating film with above-mentioned plural layers, its key is multiple
Closing position uses three pre- hot iron plates of steel rider, mode of heating to use conduction oil circulating-heating, by composite plastic film and steel plate simultaneously
In the middle of the composite roll of the adjustable pressure of feeding about two, iron plastic composite materials are formed after pressing, chilling.
Step 2) it is carried out as follows：The polycarbonate-based polyurethane of 10-30%, 10-30% polyether polyurethanes are mixed in proportion
Close, the speed for turning (preferably 300 turns) with 200-500 in agitator stirs 1-10min (preferably 5min), add water dilution
Addition levelling agent, substrate wetting agents, continue to stir 1-10min (preferably 3min) afterwards, are eventually adding polycarbodiimide crosslinkers.
Above-mentioned emulsion is imported into the full width coating machine glue groove of intaglio plate, preceding corona machine intensity settings is opened for 2-8KVA (preferably 5.5KVA), speed
Degree setting 20-40m/min (preferably 30m/min), it is 100-150 DEG C (preferably 120 DEG C) that baking oven uses steam drying temperature,
Form hardened layer；
Step 3) in, the chemical modification liquid is 50~70 DEG C and 10~-20 DEG C of two kinds of acrylic emulsions and second from Tg
Alcohol, water mixing, then coat the lower surface of BOPET base materials, and coating grammes per square metre is 0.01~0.1g/m2, form chemically modified layer；
Particularly, the weight ratio that Tg acrylic emulsions (Tg is 50~70 DEG C) high account for total system is 0.8%~1.8%, low
Tg acrylic emulsions (Tg is 10~-20 DEG C) account for 0.3%~1.0%, and ethanol accounts for 25%%~34%；
Step 3) collocation method of the chemical modification liquid is：The acrylic emulsion of two kinds of Tg of height is mixed, it is first
Alcohol solvent is first added, adding rate is about 20g/s, is added while stirring, stir speed (S.S.) is 300 turns, treats that ethanol has been added
Added water after finishing, condition is for example foregoing.
Printing layer ink is dual-component polyurethane class high temperature resistant dye ink, from face such as transparent yellow, transparent red, transparent greens
Color, thickness is typically at 0.5~1 micron；
Step 4) in, the priming coat uses the EAA aqueous solution, wherein it is solid containing accounting for 0.04%~0.5%, it is coated with dry weight
0.002~0.008g/m2, drying temperature is 90 DEG C；The modified PE is acrylic graft-modified polyvinyl resin, wherein propylene
Acid content is 8%~12%, generally long chain type macromolecule.The softening point of the modified PE more than 100 DEG C, MI=4.5~
15g/10min (190 DEG C), general thickness is set to 15~30 microns；
The adhesion promoting layer is mixed by thermally activated dispersions of polyurethanes, adhesion promoter, ethanol, water, wherein hot
Activated form dispersions of polyurethanes accounts for the 5%~35% of total system；Adhesion promoter is hydroxyl macromolecular material, and molecular weight is
1000~10000, accounting is 1%~10%；Ethanol is cosolvent, and usage amount is 5%~20%；General coating dry weight is 0.3
~2.0g/m2。
Step 5) in, the composite roll is configured with electromagnetic constant-temperature system, it is ensured that the temperature of iron plate will not be because of the speed of speed
Change.The temperature for using is 220-250 DEG C.
The present invention is with the remarkable result of prior art household electrical appliances composite：
The hardened layer that polycarbonate-based polyurethane is formed with polyether polyurethane can reach the hardness of more than 3H, while protecting
Processing characteristics of the preferable pliability beneficial to film is held, bigger space is provided to the selection of film substrate thickness.
UV structures wire drawing layer is significantly larger than mechanical wire drawing using the compacting of optical grade roller, its imitative metal wire-drawing degree, its essence
Close degree almost cannot be distinguished visually, and fine degree is high.
Using modified PE resin, using melting hot-pressing technique overlay film, plural layers and iron plate are made iron plastic composite materials,
Avoid using solvent glue, Environmental Safety to improve yield rate, due to needing the curing of 48-72 hours unlike glue, thus it is raw
Produce efficiency to also improve a lot, having covered film can be used immediately.A part of labour cost and energy consumption are also saved simultaneously, is adopted
Both attachment fastness are greatly enhanced with special thickening layer material.
Brief description of the drawings
Fig. 1 is household electrical appliances iron plastic composite materials structural representation according to embodiments of the present invention, 1 hardened wear-resistant layer in figure,
2BOPET film substrates layer, 3 chemically modified layer, 4 printing layers, 5UV structures wire drawing layer, 6 aluminium coateds, 7 priming coats, 8 modified PEs layer,
9 adhesion promoting layers, 10 polyester layers, 11 iron plate base materials.
Fig. 2 is that key is combined position schematic diagram according to embodiments of the present invention.
Specific embodiment
Below by embodiment, the present invention is further illustrated, it is intended to for explaining the present invention, and be not used to the limitation present invention
Scope.Such as it is not specifically stated, the method that the present embodiment is used is method commonly used in the art, and the equipment of use is this area
Conventional equipment.
As do not specialized, the various reagents that the present embodiment is used are various reagents commonly used in the art.
Embodiment 1
25 microns of 1400mm 6000m wide transparent pet films long are obtained in advance.
20% polycarbonate-based polyurethane, 15% polyether polyurethane are mixed in proportion, with 300 turns in agitator
Speed stirring 5min, 0.1% levelling agent, 0.5% substrate wetting agents are added after adding water dilution, continue to stir 3min, are finally added
Enter 7% polycarbodiimide crosslinkers.Above-mentioned emulsion is imported into the full width coating machine glue groove of intaglio plate, opening preceding corona machine intensity settings is
5.5KVA, speed setting 30m/min, it is 120 DEG C that baking oven uses steam drying temperature, forms 6 microns of thin hardened layer.
Two kinds of acrylic emulsions of 0.8%Tg=65 DEG C, 0.5%Tg=-10 DEG C are mixed, 30% second is added first
Alcoholic solvent, adding rate is about 20g/s and needs to add while stirring, and stir speed (S.S.) is 300 turns, after ethanol addition is finished
Add water, condition is for example foregoing.The chemical modification liquid that will have been configured is added to the first glue groove of intaglio press, opens preceding corona machine intensity
It is set as 5.0KVA, speed setting 120m/min, it is 100 DEG C that baking oven uses steam drying temperature, is coated using bachelor above-mentioned
The PET faces of base material form chemically modified layer.Gravure printing roller is used behind intaglio press, glue groove uses double-component temperature resistant transparent
Butter ink print, forms printing layer.
7% 2 functional epoxy's diacrylate prepolymers, 25% 4 functional aliphatic's urethane diacrylates are pre-
Polymers, 5% methoxy poly (ethylene glycol) monomethacrylates, the trimethylolpropane trimethacrylate monomer of cooperation 7%,
0.5% 2,4,6- trimethyl benzoyl diphenyl bases phosphine oxide initiator, 0.2% polyether silicones class stream and ethanol,
Ethyl acetate, butyl acetate are mixed by proper ratio, are added to UV forming machine glue grooves, and above-mentioned composite membrane is used into intaglio plate gluing side
Formula, by oven drying, extrudes after first order UV solidifications by a steel rider for being carved with wire drawing lines, finally enters second level UV
Curing molding forms UV structures wire drawing layer, the composite membrane feeding vacuum aluminum-plating machine after winding is aluminized, in threaded configuration layer
Aluminium lamination is formed after absorption, light refraction, reflection angle can be made different, form wire drawing metal-like, general thickness exists
By above-mentioned laminated film feeding curtain coating equipment complex, using the light roller coat EAA aqueous solution, wherein contain admittedly accounting for 0.04%
~0.5%, 0.002~0.008g/m2 of dry weight is coated with, to deliver to compound position after 90 DEG C, extruder absorbs PE to drying temperature
Son enters cavity, and extrusion coated in priming coat by die head in 260 DEG C of heating and meltings, modified PE is acrylic graft-modified poly- second
Olefine resin, wherein acrylic acid content are 8%, generally long chain type macromolecule, and its softening point is 108 DEG C, MI=4.5g/10min
(190 DEG C), thickness is set to 20 microns.Thermally activated dispersions of polyurethanes, 1% hydroxyl macromolecular material 10%,
15% ethanol, water is well mixed, and to coat PE faces using light roller mode as thickening material rolling rear standby.
As shown in Fig. 2 iron plate that thickness is the prefabricated white polyester layers of 0.3mm is with above-mentioned more by hot pressing equipment for coating film
Layer film is combined, and the compound position of its key uses three pre- hot iron plates of steel rider, mode of heating to use conduction oil circulating-heating,
Composite plastic film and steel plate are sent into the middle of about two composite rolls of adjustable pressure simultaneously, iron is formed after pressing, chilling
Plastic composite materials.
Embodiment 2
25 microns of 1400mm 6000m wide transparent pet films long are obtained in advance.
20% polycarbonate-based polyurethane, 15% polyether polyurethane are mixed in proportion, with 300 turns in agitator
Speed stirring 5min, 0.1% levelling agent, 0.5% substrate wetting agents are added after adding water dilution, continue to stir 3min, are finally added
Enter 7% polycarbodiimide crosslinkers.Above-mentioned emulsion is imported into the full width coating machine glue groove of intaglio plate, opening preceding corona machine intensity settings is
5.5KVA, speed setting 30m/min, it is 120 DEG C that baking oven uses steam drying temperature, forms 6 microns of thin hardened layer.
The acrylic emulsion of 1.5%Tg=74 DEG C, 0.4%Tg=-15 DEG C is mixed, 24% ethanol is added first molten
Agent, adding rate is about 20g/s and needs to add while stirring, and stir speed (S.S.) is 300 turns, is added after ethanol addition is finished
Water, condition is for example foregoing.The chemical modification liquid that will have been configured is added to the first glue groove of intaglio press, opens preceding corona machine intensity and sets
It is set to 5.0KVA, speed setting 120m/min, it is 100 DEG C that baking oven uses steam drying temperature, and above-mentioned base is coated using bachelor
The PET faces of material form chemically modified layer.Gravure printing roller is used behind intaglio press, glue groove is red using double-component temperature resistant transparent
Ink prints, and forms printing layer.
7% 2 functional epoxy's diacrylate prepolymers, 25% 4 functional aliphatic's urethane diacrylates are pre-
Polymers, 5% methoxy poly (ethylene glycol) monomethacrylates, the trimethylolpropane trimethacrylate monomer of cooperation 7%,
0.5% 2,4,6- trimethyl benzoyl diphenyl bases phosphine oxide initiator, 0.2% polyether silicones class stream and ethanol,
Ethyl acetate, butyl acetate are mixed by proper ratio, are added to UV forming machine glue grooves, and above-mentioned composite membrane is used into intaglio plate gluing side
Formula, by oven drying, extrudes after first order UV solidifications by a steel rider for being carved with wire drawing lines, finally enters second level UV
Curing molding forms UV structures wire drawing layer, the composite membrane feeding vacuum aluminum-plating machine after winding is aluminized, in threaded configuration layer
Aluminium lamination is formed after absorption, light refraction, reflection angle can be made different, form wire drawing metal-like, thickness exists
By above-mentioned laminated film feeding curtain coating equipment complex, using the light roller coat EAA aqueous solution, wherein contain admittedly accounting for 0.04%
~0.5%, 0.002~0.008g/m2 of dry weight is coated with, to deliver to compound position after 90 DEG C, extruder absorbs PE to drying temperature
Son enters cavity, and extrusion coated in priming coat by die head in 260 DEG C of heating and meltings, modified PE is acrylic graft-modified poly- second
Olefine resin, wherein acrylic acid content are 8%, generally long chain type macromolecule, and its softening point is 108 DEG C, MI=4.5g/10min
(190 DEG C), thickness is set to 20 microns.Thermally activated dispersions of polyurethanes, 1% hydroxyl macromolecular material 10%,
15% ethanol, water is well mixed, and to coat PE faces using light roller mode as thickening material rolling rear standby.
As shown in Fig. 2 iron plate that thickness is the prefabricated white polyester layers of 0.3mm is with above-mentioned more by hot pressing equipment for coating film
Layer film is combined, and the compound position of its key uses three pre- hot iron plates of steel rider, mode of heating to use conduction oil circulating-heating,
Composite plastic film and steel plate are sent into the middle of about two composite rolls of adjustable pressure simultaneously, iron is formed after pressing, chilling
Plastic composite materials.
The hardened layer that the polycarbonate-based polyurethane of the present invention is formed with polyether polyurethane can reach the hardness of more than 3H,
Keep preferable pliability beneficial to the processing characteristics of film simultaneously, bigger space is provided to the selection of film substrate thickness.
UV structures wire drawing layer is significantly larger than mechanical wire drawing using the compacting of optical grade roller, its imitative metal wire-drawing degree, its essence
Close degree almost cannot be distinguished visually, and fine degree is high.
Using modified PE resin, using melting hot-pressing technique overlay film, plural layers and iron plate are made iron plastic composite materials,
Avoid using solvent glue, Environmental Safety to improve yield rate, due to needing the curing of 48-72 hours unlike glue, thus it is raw
Produce efficiency to also improve a lot, having covered film can be used immediately.A part of labour cost and energy consumption are also saved simultaneously, is adopted
Both attachment fastness are greatly enhanced with special thickening layer material.
Claims (9)
1. a kind of household electrical appliances iron plastic composite materials, it is characterised in that the composite structure is followed successively by from top to bottom：Hardening is resistance to
Mill layer, BOPET film substrate layer, chemically modified layer, printing layer, UV structures wire drawing layer, aluminium coated, priming coat, modified PE layer, increasing
Adhesion coating, polyester layer and iron plate base material；Each layer is mutually combined closely；Wherein, the chemically modified layer is prepared as follows：From
Tg is that 50~70 DEG C and 10~-20 DEG C of two kinds of acrylic emulsions mix with ethanol, water, wherein, Tg is 50~70 DEG C of acrylic acid
Emulsion accounts for the weight ratio of total system for the acrylic emulsion that 0.8%~1.8%, Tg is 10~-20 DEG C accounts for 0.3%~1.0%, second
Alcohol accounts for 25~34%；Remaining is water；Then mixed liquor coated the lower surface of BOPET base materials, coating grammes per square metre is 0.01~
0.1g/m2It is made.
2. composite as claimed in claim 1, it is characterised in that the BOPET film is transparent biaxial tension poly- to benzene
Naphthalate film, thickness is 25~30 microns；The hardened wear-resistant layer thickness is 5~8 microns.
3. composite as claimed in claim 1, it is characterised in that the UV structures wire drawing layer is following to be prepared：By epoxy third
Olefin(e) acid ester prepolymer, aliphatic urethane acrylate prepolymer, monomer, initiator, levelling agent, solvent mixing, by coating
Oven drying, ultra violet lamp be semi-harden after UV resins, roller extrusion structure shaping, ultra violet lamp hardening process are realized；
The thickness of the UV structures wire drawing layer is 10~18 microns.
4. composite as claimed in claim 1, it is characterised in that the aluminium coated is aluminium atom sedimentary；It is described to aluminize
Layer is in high vacuum conditions, metallic aluminium fusion and gasification to be made with the heating of resistance, high frequency or electron beam, after threaded configuration layer absorption
Aluminium lamination is formed, light refraction, reflection angle can be made different, form wire drawing metal-like, thickness is
5. composite as claimed in claim 1, it is characterised in that the thickness of the modified PE layer is 15~30 microns；Institute
To state iron plate base material be the one kind in tin plating, zinc-plated, chromium plating, plain sheet, and in the prefabricated polyester layer in surface, thickness is 0.25~
0.8mm。
6. the preparation method of the composite as described in claim 1-5 is any, it is characterised in that comprise the following steps：
1) by transparent BOPET film biaxial tension, the BOPET substrate layers that thickness is 25~30 microns are obtained；
2) by polycarbonate-based polyurethane, polyether polyurethane, polycarbodiimide crosslinkers, acrylate levelling agent, polyethers silicon
Oxygen alkanes wetting agent, water mix emulsion, and in the upper surface of BOPET substrate layers using the full width coating of intaglio plate, then high temperature is dry
Dry, thickness is 5~8 microns, obtains hardened wear-resistant layer；
3) acrylic emulsion is configured to chemical modification liquid, is added to the first glue groove of intaglio press, open preceding corona machine intensity
It is set as 2-10KVA, speed setting 50-150m/min, baking oven uses steam drying, and temperature is 100 DEG C, is coated using smooth roll
The PET faces of above-mentioned base material form chemically modified layer；Gravure printing roller is used behind intaglio press, glue groove uses double-component high temperature
Ink, after printing, printing layer is formed in modified layer surface, obtains laminated film；
4) by epoxy acrylic ester prepolymer 5-10%, aliphatic urethane acrylate prepolymer 5-10%, monomer 15-
25%th, initiator 0.5-2%, levelling agent 0.05-0.5%, remaining be solvent mixing, be added in UV forming machine glue grooves, will walk
The rapid laminated film for 3) obtaining uses intaglio plate gluing mode, by oven drying, drawing is carved with by one after first order UV solidifications
The steel rider extruding on silking road, finally enters second level UV curing moldings and forms UV structures wire drawing layer, and the composite membrane after winding is sent
Enter vacuum aluminum-plating machine to be aluminized, form aluminium coated；
5) by step 4) laminated film that obtains feeding curtain coating equipment complex, silane coupling agent is coated with the face of aluminizing using smooth roll；Through dry
Compound position is delivered to after dry, extruder absorbing propenoic acid graft modification PE particles enter cavity, in 260 DEG C of heating and meltings by mould
It is extrusion coated in priming coat, die head is equipped with 3~10 layers of screen pack, and aperture is 30~100 mesh, by 20~30 DEG C of chill roll
With compression roller, modified PE layer is formed, its extruded velocity is 30~200MPM；After corona layer material will be viscosified using light roller mode
Coat PE faces and form adhesion promoting layer, it is rolling rear standby；
6) by the iron plate of prefabricated polyester layer by hot pressing equipment for coating film and step 5) plural layers that obtain are combined, and it is closed
The compound position of key uses three pre- hot iron plates of steel rider, and mode of heating uses conduction oil circulating-heating, by composite plastic film and iron plate
Simultaneously in the middle of the composite roll of the adjustable pressure of feeding about two, iron plastic composite materials are formed after pressing, chilling.
7. the preparation method of composite as claimed in claim 6, it is characterised in that step 2) it is carried out as follows：By poly- carbonic acid
Esters polyurethane, polyether polyurethane mixing, the speed turned with 200-500 in agitator stir 1-10min, add water dilution
Addition acrylate levelling agent, polyether silicone class wetting agent, continue to stir 1-10min, last addition polymerization carbodiimide crosslinking afterwards
Agent, ratio is that the weight ratio that polycarbonate-based polyurethane accounts for total system is 10-30%；Polyether polyurethane accounts for the weight of total system
Than being 10-30%；Polycarbodiimide crosslinkers account for 5%~10%；Levelling agent, substrate wetting agents respectively account for 0.1%~1%, remaining
It is water；
Above-mentioned emulsion is imported into the full width coating machine glue groove of intaglio plate, preceding corona machine intensity settings is opened for 2-8KVA, speed setting 20-
40m/min, baking oven uses steam drying, and temperature is 100-150 DEG C, forms hardened wear-resistant layer.
8. the preparation method of composite as claimed in claim 6, it is characterised in that step 3) in, the chemical modification liquid
It is that 50~70 DEG C and 10~-20 DEG C of two kinds of acrylic emulsions mix with ethanol, water from Tg, then coats BOPET base materials
Lower surface, coating grammes per square metre is 0.01~0.1g/m2, form chemically modified layer；Wherein, (Tg is 50~70 to Tg acrylic emulsions high
DEG C) to account for the weight ratio of total system be 0.8%~1.8%, low Tg acrylic emulsions (Tg is 10~-20 DEG C) account for 0.3%~
1.0%, ethanol accounts for 25~34%；Step 3) collocation method of the chemical modification liquid is：By two kinds of propylene yogurts of Tg of height
Liquid is mixed, and alcohol solvent is added first, and adding rate is about 20g/s, is added while stirring, and stir speed (S.S.) is 300 turns,
Added water after ethanol addition is finished.
9. the preparation method of composite as claimed in claim 6, it is characterised in that step 6) in, the composite roll configuration
There is electromagnetic constant-temperature system, it is ensured that the temperature of iron plate will not change because of the speed of speed, and the temperature for using is 220-250 DEG C.
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| CN112606502A (en) * | 2020-12-23 | 2021-04-06 | 上海品诚控股集团有限公司 | Scratch-resistant polycarbonate solid plate and preparation method thereof |
| CN115246244A (en) * | 2022-06-21 | 2022-10-28 | 东莞市悠悠美居家居制造有限公司 | Novel aluminum-washing counter-pressing fine drilling table mat preparation process |
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| CN100528981C (en) * | 2006-04-28 | 2009-08-19 | 佛山市顺德区汉达精密电子科技有限公司 | Low-yellowing UV varnish |
| CN203844354U (en) * | 2014-01-20 | 2014-09-24 | 北京康得新功能材料有限公司 | Hot-pressing fusion type iron covering film |
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