CN106833451A - A kind of ASA co-extrusion section bars privacy protection film and preparation method - Google Patents

A kind of ASA co-extrusion section bars privacy protection film and preparation method Download PDF

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Publication number
CN106833451A
CN106833451A CN201710117457.4A CN201710117457A CN106833451A CN 106833451 A CN106833451 A CN 106833451A CN 201710117457 A CN201710117457 A CN 201710117457A CN 106833451 A CN106833451 A CN 106833451A
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asa
privacy protection
preparation
film
extrusion section
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CN106833451B (en
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顾成兵
王小龙
王传华
侯克林
杨文瑞
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Wuhu Conch New Material Co Ltd
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Wuhu Conch New Material Co Ltd
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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
    • C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
    • C09J133/00—Adhesives 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 only one carboxyl radical, or of salts, anhydrides, esters, amides, imides, or nitriles thereof; Adhesives based on derivatives of such polymers
    • C09J133/04—Homopolymers or copolymers of esters
    • C09J133/06—Homopolymers or copolymers of esters of esters containing only carbon, hydrogen and oxygen, the oxygen atom being present only as part of the carboxyl radical
    • C09J133/08—Homopolymers or copolymers of acrylic acid esters
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B27/00—Layered products comprising a layer of synthetic resin
    • B32B27/06—Layered products comprising a layer of synthetic resin as the main or only constituent of a layer, which is next to another layer of the same or of a different material
    • B32B27/08—Layered products comprising a layer of synthetic resin as the main or only constituent of a layer, which is next to another layer of the same or of a different material of synthetic resin
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B27/00—Layered products comprising a layer of synthetic resin
    • B32B27/32—Layered products comprising a layer of synthetic resin comprising polyolefins
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B27/00—Layered products comprising a layer of synthetic resin
    • B32B27/36—Layered products comprising a layer of synthetic resin comprising polyesters
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B33/00—Layered products characterised by particular properties or particular surface features, e.g. particular surface coatings; Layered products designed for particular purposes not covered by another single class
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B37/00—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding
    • B32B37/12—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding characterised by using adhesives
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B38/00—Ancillary operations in connection with laminating processes
    • B32B38/14—Printing or colouring
    • B32B38/145—Printing
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B7/00—Layered products characterised by the relation between layers; Layered products characterised by the relative orientation of features between layers, or by the relative values of a measurable parameter between layers, i.e. products comprising layers having different physical, chemical or physicochemical properties; Layered products characterised by the interconnection of layers
    • B32B7/04—Interconnection of layers
    • B32B7/12—Interconnection of layers using interposed adhesives or interposed materials with bonding properties
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
    • C08F220/00—Copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and only one being terminated by only one carboxyl radical or a salt, anhydride ester, amide, imide or nitrile thereof
    • C08F220/02—Monocarboxylic acids having less than ten carbon atoms; Derivatives thereof
    • C08F220/10—Esters
    • C08F220/12—Esters of monohydric alcohols or phenols
    • C08F220/16—Esters of monohydric alcohols or phenols of phenols or of alcohols containing two or more carbon atoms
    • C08F220/18—Esters of monohydric alcohols or phenols of phenols or of alcohols containing two or more carbon atoms with acrylic or methacrylic acids
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
    • C08K5/00—Use of organic ingredients
    • C08K5/16—Nitrogen-containing compounds
    • C08K5/34—Heterocyclic compounds having nitrogen in the ring
    • C08K5/3412—Heterocyclic compounds having nitrogen in the ring having one nitrogen atom in the ring
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
    • C09J11/00—Features of adhesives not provided for in group C09J9/00, e.g. additives
    • C09J11/02—Non-macromolecular additives
    • C09J11/06—Non-macromolecular additives organic
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2255/00—Coating on the layer surface
    • B32B2255/10—Coating on the layer surface on synthetic resin layer or on natural or synthetic rubber layer
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2255/00—Coating on the layer surface
    • B32B2255/26—Polymeric coating
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
    • C08F220/00—Copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and only one being terminated by only one carboxyl radical or a salt, anhydride ester, amide, imide or nitrile thereof
    • C08F220/02—Monocarboxylic acids having less than ten carbon atoms; Derivatives thereof
    • C08F220/10—Esters
    • C08F220/12—Esters of monohydric alcohols or phenols
    • C08F220/16—Esters of monohydric alcohols or phenols of phenols or of alcohols containing two or more carbon atoms
    • C08F220/18—Esters of monohydric alcohols or phenols of phenols or of alcohols containing two or more carbon atoms with acrylic or methacrylic acids
    • C08F220/1808—C8-(meth)acrylate, e.g. isooctyl (meth)acrylate or 2-ethylhexyl (meth)acrylate

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  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Health & Medical Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Medicinal Chemistry (AREA)
  • Polymers & Plastics (AREA)
  • Adhesives Or Adhesive Processes (AREA)

Abstract

The invention provides a kind of ASA co-extrusion section bars privacy protection film and preparation method; compared with prior art; the ASA co-extrusion section bar privacy protection film key technologies that the present invention is provided are by the method using redox polymerization technique and interior external crosslinking; appropriateness improves the molecular weight and crosslinking degree of resin; reduce the generation and migration of low molecular compound; reduction pastes the generation of rear phantom; common emulsifying agent is substituted using reactive emulsifier; emulsifying agent participates in macromolecular polymerization reaction; it is grafted on high molecular polymer; will not migrate, reduce pollution of the emulsifying agent to section bar.

Description

A kind of ASA co-extrusion section bars privacy protection film and preparation method
Technical field
The invention belongs to a kind of section bar diaphragm, and in particular to a kind of ASA co-extrusion section bars privacy protection film and preparation method.
Background technology
ASA section bars are a kind of good weatherabilities, the good high-grade door and window material of excellent, physical property are processed, with client's Individual demand, its market share progressively expands, but due to its own feature of the ASA materials of ASA Surface of profile co-extrusions, in extrusion High speed polishing equipment must be added during production carries out second polishing, before being dispatched from the factory due to section bar must surface paste layer protecting film, And common diaphragm is difficult to meet its requirement after pasting the ASA Surface of profile of second polishing, can be produced in Surface of profile unreal Shadow, pollutes section material appearance.
The content of the invention
The purpose of the present invention is providing a kind of ASA co-extrusion section bars privacy protection film, and pressure sensitive adhesive used is using various propylene Acid ester monomer copolymerization obtains acrylate pressure sensitive adhesive system, reduces low molecular compound in acrylic emulsion, coordinates outside cross-linking agent, improves Adhesion, solves phantom problem.
Present invention also offers a kind of preparation method of ASA co-extrusion section bars privacy protection film, including printing, compound and painting Cloth.
A kind of ASA co-extrusion section bars privacy protection film that the present invention is provided, base material is BOPP film and aluminum plated PET film, aids in material Expect to be ink, composite glue, pressure sensitive adhesive.
Further, base material is 18 μm of BOPP films and 12 μm of aluminum plated PET films, auxiliary material ink (4~7g/ of printing consumption m2), composite glue (2~3g/m of dry glue amount2), pressure sensitive adhesive (5~6g/m of dry glue amount2).It is BOPP film, aluminum plated PET film, ink, compound Glue is versatile material, and the main distinction is pressure sensitive adhesive.The pressure sensitive adhesive is made up of host acrylate copolymer emulsion and outside cross-linking agent.
The host acrylate copolymer emulsion, contains following percentage by weight raw material：
Wherein acrylic acid AA, butyl acrylate BA, hydroxy-ethyl acrylate HEA, 2-ethyl hexyl acrylate 2-EHA and methacrylic acid Methyl esters MMA is polymer grade.
Ammonium persulfate APS, formaldehyde close time sodium hydrogensulfite, emulsifying agent A-501, emulsifying agent SE-10N, wetting agent OT-75, TBHP, ammonium hydrogen carbonate, sodium hydrogensulfite, AAEM AAEM and ammoniacal liquor are industry Level.
The outside cross-linking agent is selected from aziridine SC-100, and consumption is the 1.5-2% of host acrylate copolymer emulsion quality.
The preparation method of the host acrylate copolymer emulsion, comprises the following steps：
1) under the conditions of 60-66 DEG C, to the over cure of the emulsified monomer mixed liquor of addition 4%-6%, 9-11% in reactor The solution of sodium bisulfite of sour ammonia solution and 9-11%, carries out initial stage polymerisation；
2) and then, while remaining emulsified monomer mixed liquor, remaining ammonium persulfate solution, surplus is at the uniform velocity added dropwise to reactor Remaining solution of sodium bisulfite and monomer mixture, it is continuous to be added dropwise 3.9-4.1 hours, during temperature control at 60~66 DEG C；
3) after completion of dropping, 25-35min is incubated, then, adds oxidant TBHP molten at 60-66 DEG C Liquid and close time solution of sodium bisulfite with reducing agent formaldehyde and carry out residual monomer elimination reaction；
4) and then, reactor is cooled to less than 45 DEG C, plus the ammoniacal liquor regulation pH value after dilution；
5) wetting agent solution is added, is stirred, temperature of reaction kettle is down to less than 40 DEG C, after sampling detection is qualified, breast Glue is discharged with 200 mesh net filtrations, obtains final product host acrylate copolymer emulsion.
Step 1) in carry out initial stage polymerization reaction time for 25-35min；
Step 2) described at the uniform velocity rate of addition be 60 drop -80 drops/min；
Step 3) described in eliminate the monomer reaction time be 25-35min；
Step 5) in plus dilution after ammoniacal liquor regulation pH value after, cross 8-12min after after stable system, add wetting agent molten Liquid.
The preparation method of the emulsified monomer mixed liquor is：By the deionized water of 0.5-1.5%, the carbon of 0.04--0.1% The emulsifying agent A-501 of sour hydrogen ammonium and 0.02--0.05% is mixed, and obtains final product emulsified monomer mixed liquor；
The preparation method of the monomer mixture is：By the deionized water of 38-40%, 0.2-0.4% emulsifying agent SE- 10N, 0.4-0.6% acrylic acid AA, the methyl methacrylate of 0.6-1% hydroxy-ethyl acrylate HEA, 1.5-3% MMA, 10-20% butyl acrylate BA, the acetoacetate ylmethyl of 20-30% 2-ethyl hexyl acrylate 2-EHA and 0.6-1 Ethyl acrylate AAEM is stirred and evenly mixed, and obtains monomer mixture；
The preparation method of the ammonium persulfate solution is：The deionized water of 0.5-1.5%, 0.2-0.3% ammonium persulfate APS mixes, and obtains ammonium persulfate solution；
The preparation method of the solution of sodium bisulfite is：The deionized water of 0.5-1.5% and 0.2-0.3% sulfurous Sour hydrogen sodium is mixed, and obtains solution of sodium bisulfite；
The preparation method of the TBHP solution is：The deionized water of 0.5-1.5% and 0.05-0.08% TBHP mix, obtain TBHP solution；
The preparation method that the reducing agent formaldehyde closes time solution of sodium bisulfite is：The deionized water of 0.5-1.5%, 0.05-0.08% formaldehyde closes time sodium hydrogensulfite and mixes, and obtains reducing agent formaldehyde and closes time solution of sodium bisulfite；
Ammoniacal liquor preparation method after the dilution is that the deionized water and 0.4-0.6% ammoniacal liquor of 0.5-1.5% are mixed, Ammoniacal liquor after being diluted；
The deionized water of the wetting agent solution 9-11% and the wetting agent OT-75 of 0.06-1% are mixed, and obtain wetting agent Solution.
Further, to outside cross-linking agent SC-100 is added in the host acrylate copolymer emulsion for preparing, stir, prepare Into diaphragm pressure sensitive adhesive.
A kind of preparation method of ASA co-extrusion section bars privacy protection film that the present invention is provided, comprises the following steps：
Printing element is BOPP film, using printing plate cylinder by printing ink transfer to film, forms print film；By compound Two kinds of base materials of print film and aluminum plated PET film are combined into a kind of material by glue；Pressure sensitive adhesive coating is reused, diaphragm is formed.
Further, when pressure sensitive adhesive is coated with, spread 0.5-1.0 is controlled.
The macromolecule of the various acrylate monomer copolymerization of acrylate pressure sensitive adhesive system in the present invention, belongs to a kind of viscoplasticity Body, different types of monomer plays different special roles in macromolecule, and wherein alkyl carbon atoms are 4-12 alkyl acrylate Base ester plays adhesive attraction, such as BA, 2-EHA, and the glass transition temperature of its homopolymers is-40-- 80 DEG C；The glass of homopolymers Change transition temperature monomer higher and play raising cohesive force, and have special role, such as MMA to adhesion, water resistance, transparency etc. Deng；Monomer with functional group is altered contents, and the water-fast, heat-resisting and resistance to of adhesive can be improved by being cross-linked to form network structure Solvent borne, and raising to adhesiveness, cohesive force works, its functional group can be：Hydroxyl, carboxyl, amino, amide groups, ring Epoxide etc..
The physico-chemical property of pressure sensitive adhesive has much relations with the size of the high molecular glass transition temperature of its copolymer, according to The different purposes and use requirement of pressure sensitive adhesive, should design different copolymer glass transition temperatures, and general range is-30-- 80℃.Under identical glass transition temperature, the performance of copolymer is better than homopolymers, because soft in copolymer, hard list Body composition (segment) provides each different performances to meet the overall performance requirement of pressure sensitive adhesive, and this is even more important to diaphragm. In the present invention each base glass transition temperature be HEA-15 DEG C, 2-EHA-70 DEG C, BA-54 DEG C, 103 DEG C of MMA, AA100 ℃、MAA 130℃。
Diaphragm in use phantom produce main cause be in contact adhesive small molecule migration be adsorbed onto type Material surface, produces phantom, therefore we reduce micromolecular compound and produce in emulsion polymerization production process using technical method, The migration that high molecular crosslink density intercepts micromolecular compound is improved simultaneously.The application use technological approaches be：1st, pressure is improved The molecular weight of quick glue；2nd, using various crosslinking technologicals.
Pressure sensitive adhesive polymer molecular weight is improved, the present invention uses oxidationreduction polymerization technique.Polymer molecular weight be polymerized Reaction temperature is related, and polymeric reaction temperature is higher, and molecular weight is smaller, otherwise polymeric reaction temperature is lower, and molecular weight is bigger.Typically , at 84 DEG C or so, oxidationreduction polymeric reaction temperature is at 65 DEG C or so for emulsion polymerization temperature.
Crosslinking degree is improved, using inside and outside cross-linking method, we are except adding 1% -2% in emulsion formulations for the present invention Acrylic acid (AA) and hydroxy-ethyl acrylate (HEA), using its functional group's carboxyl (- COOH) and hydroxyl (- OH) be crosslinked anti- Should, the interior crosslinking functional monomer AAEM with normal-temperature reaction performance, consumption about 1% -2% are also added, its main cause is： During aggregation test, it has been found that simple gluing to increase by improving acrylic acid (AA) and hydroxy-ethyl acrylate (HEA) amount The crosslink density of agent, this method is infeasible, because carboxyl and hydroxy radical content increase can influence polymerization anti-in emulsion polymerization systems Stability is answered, aqueous polymerization degree is increased, cause emulsion gel amount and system viscosity to increase, emulsion wetability declines, and has a strong impact on The performance of diaphragm pressure sensitive adhesive coating performance and then influence diaphragm.Add appropriate self-crosslinking functional monomer AAEM and not only reduce this A little harmful effects, it is ensured that pressure sensitive adhesive polymerization stability, can also improve the crosslinking degree and adhesion of adhesive, while addition is certain The outside cross-linking agent SC-100 of amount improves pressure sensitive adhesive crosslinking degree
Although host acrylate emulsion employs oxidationreduction polymerization technique, and adds selfing receipts or other documents in duplicate Body AAEM, it is possible to increase the cohesive force of pressure sensitive adhesive, improves its heat resistance, but if being used alone, be added without outside cross-linking agent nitrogen third Pyridine SC-100, it is impossible to eliminate the danger with phantom degumming.Therefore in production diaphragm, when pressure sensitive adhesive is coated with, according to different protections Film index request is different, in addition it is also necessary to add a certain amount of outside cross-linking agent SC-100 to improve pressure sensitive adhesive crosslinking degree and usability Can, meet the diaphragm demand of different size, especially requirement under severe conditions.
, generally up to millions of, we are using low-temperature oxidation reductive polymerization technique and inside and outside for the molecular weight of polymeric Cross-linking method produces diaphragm pressure sensitive adhesive, it is therefore an objective to the molecular weight and intermolecular cross-linking degree of pressure sensitive adhesive are improved, so as to reduce low The generation and migration of molecular compound, improve the cohesive strength of pressure sensitive adhesive, meet the diaphragm not performance requirement such as transfer adhesive, but If being used for emulsion polymerised products with common emulsifying agent, this emulsifying agent participates in high molecular weight reactive, in free in diaphragm glue-line State, extension over time can move to Surface of profile, and then pollute section bar, so we use reactive emulsifier (SE- Common emulsifying agent 10N) is substituted, reactive emulsifier can participate in macromolecular polymerization reaction, be grafted on high molecular polymer, no Can migrate.
Compared with prior art, the ASA co-extrusion section bar privacy protection film key technologies that the present invention is provided are by using oxygen The method of change-reductive polymerization technique and interior external crosslinking, appropriateness improves the molecular weight and crosslinking degree of resin, reduces low molecule chemical combination The generation and migration of thing, reduction paste the generation of rear phantom, and common emulsifying agent is substituted using reactive emulsifier, and emulsifying agent is participated in Macromolecular polymerization reaction, is grafted on high molecular polymer, will not migrate, and reduces pollution of the emulsifying agent to section bar.
Specific embodiment
Embodiment 1
A kind of ASA co-extrusion section bars privacy protection film, base material is 18 μm of BOPP films and 12 μm of aluminum plated PET films, auxiliary material oil Ink (4~7g/m of printing consumption2), composite glue (2~3g/m of dry glue amount2), pressure sensitive adhesive (5~6g/m of dry glue amount2)。
BOPP film, aluminum plated PET film, ink, composite glue are versatile material, and the main distinction is pressure sensitive adhesive.
The pressure sensitive adhesive is made up of host acrylate copolymer emulsion and outside cross-linking agent.
The host acrylate copolymer emulsion, containing following raw material, percentage by weight such as following table：
The preparation method of host acrylate copolymer emulsion is (weaving into component in sequence)：
Emulsion polymerization is carried out in four mouthfuls of reaction bulbs of dress agitator, reflux condenser, thermometer and dropping funel.Have
1) by the raw material deionized water of component (), ammonium hydrogen carbonate, emulsifying agent A-501 input reaction bulbs；
2) the raw material deionized water of component (two), emulsifying agent SE-10N and whole monomer inputs are added dropwise in bottle, stirring half Hour is well mixed, obtains monomer mixture；
3) reaction bulb aqueous solution stirring is warming up to 62~64 DEG C, adds 5% component (one) emulsified monomer mixed liquor, 10% Component (three) ammonium persulfate solution and 10% component (four) solution of sodium bisulfite, carry out initial stage polymerisation；
4) after 30 minutes after temperature of reaction kettle stabilization, while remaining 95% component () being at the uniform velocity added dropwise to reactor, remaining Remaining the ammonium persulfate solution and component (four) solution of sodium bisulfite and monomer mixture of 90% component (three), be polymerized anti- Should, continuous to be added dropwise 4 hours, temperature control is at 64~66 DEG C；
5) completion of dropping insulation half an hour, temperature control is at 64~66 DEG C；Then reactor adds component (five) oxidant TBHP solution and component (six) reducing agent formaldehyde close time solution of sodium bisulfite and carry out residual monomer elimination reaction；
6) after reaction half an hour, reactor is cooled to the ammoniacal liquor regulation latex after less than 45 DEG C, plus component (seven) dilution PH value, adds component (eight) wetting agent after 10 minutes, stir, and temperature of reaction kettle is down to less than 40 DEG C, and sampling detection is qualified Afterwards, latex is discharged with 200 mesh net filtrations, into product.
The host acrylate copolymer emulsion performance indications such as table 1 below of preparation：
Table 1:Host technical indicator
Sequence number Project Technical indicator Test method
1 Outward appearance It is milky white Range estimation
2 Total solid content % 43±1 GB/T 11175-2002
3 PH 7—9 SH/T 1150-1999
4 Viscosity cps Less than 100 GB/T 11175-2002
5 Stability (stands half a year) Without lamination Range estimation
The examination and test of products is tested：
The preparation method of the pressure sensitive adhesive is：Index request according to different diaphragms adds appropriate outside cross-linking agent SC- 100, stir, it is configured to diaphragm pressure sensitive adhesive；The addition of outside cross-linking agent SC-100 is the 1.5-2% of host weight.
Meanwhile, the present invention has also investigated influence of the different cross-linking monomer additions to emulsion and see the table below 2：
Influence of the cross-linking monomer addition of table 2 to emulsion
Remarks：1st, protection film base material is PET aluminizers；Protection materials are plastic-steel section bars
2nd, dry glue thickness is 1.0.
3rd, the outside cross-linking agent aziridine of 1.5% emulsion amount is added
It is different according to different diaphragm index requests, a certain amount of outside cross-linking agent SC-100 (see the table below) is added to improve pressure Quick glue crosslinking degree and performance, meet the diaphragm demand of different size, especially requirement under severe conditions.No Together, influence of the dosage of crosslinking agent to diaphragm, see the table below 3：
Influence of the outside cross-linking agent SC-100 consumptions of table 3 to diaphragm
Remarks：1st, base material is PET aluminizers；Protection materials are aluminium-plastic section bars
2nd, dry glue thickness is 1.0.
With reference to following index and standard detection with all worries set aside：
A kind of preparation method of ASA co-extrusion section bars privacy protection film, comprises the following steps：
Printing element is BOPP film, using printing plate cylinder by printing ink transfer to film, forms print film；By compound Two kinds of base materials of print film and aluminum plated PET film are combined into a kind of material by glue；Special pressure sensitive adhesive coating is reused, protection is formed Film.
Print for diaphragm produces the first procedure, be by printing ink transfer to stock using printing plate or other manner A kind of technology.By printing plate species point：The mode of printings such as intaglio plate, flexographic plate, silk version, relief printing plate, lithographic plate.My company uses intaglio plate Typography is produced, and is the duplication that picture and text are realized using plastic sheeting, intaglio plate, ink, printing machinery, refers to the figure line of printing plate Partially below non-figure line part, in the presence of certain pressure, ink is transferred to a kind of mode of printing on stock surface, it Belong to and directly print.During production, printing material is released through unwinding device and enters printing equipment, and the ink of plate surface is scraped by scraper Go, the ink in site is transferred on print material when material (BOPP film) is depressed and connects true printing, afterwards into baking oven, ink In solvent composition heating, blowing baking oven in vapor away.Print film from baking oven out afterwards through supercooling roller when, cooling is fixed Shape.Chromatography between computer automatic chromatography device control colors.After being completed for printing, printing is coiled into web-like film by wrap-up, i.e., Print film.
The technological process of intaglio printing：Thin-film unreeling → the color of tension force → printing first → color of drying → chromatography second → The 3rd color of drying → chromatography → drying → the 4th color of chromatography → drying → traction → winding
The printing technology control point of ASA privacy protections film should be set according to such as table 4 below in the application：
Printing parameter control in the application of table 4
Compound working procedure be by two or more Material cladding together, formed one material.Composite was both The good characteristic of monolayer material can be kept, its respective deficiency can be overcome again, there is new characteristic after being combined, meet commodity to multiple The different requirements of condensation material.Compound classification has：Dry type composite algorithm, wet type composite algorithm, extrusion composite algorithm, hot melt composite algorithm, altogether Squeeze composite algorithm.My company is now that during production, upper gum base materials (aluminum plated PET film) are through unreeling using dry type composite algorithm technique productions Device is released and enters glue spreading apparatus, and the glue on glue spreader (anilox roll) surface is scraped off by scraper, and the glue in site is in upper matrix Material is depressed when connecing true and is transferred on gluing substrate surface, and afterwards into baking oven, the solvent composition in glue is being heated, blown Vapored away in the baking oven of wind.From baking oven out after, with another unwinding device release base material (print film) heating, pressurization answer In combined pressure roller, laminating is integrated.It is web-like composite membrane to be batched by wrap-up after cooling and shaping.
The 26S Proteasome Structure and Function of dry compound machine.
Dry compound machine is constituted by unreeling, being coated with, dry, be combined, winding five parts
(1) unreels part
Unreel and use air-expanding shaft supporting base material more, because air-expanding shaft is easy to operate, be conducive to handling to change base material refill, and And support force is uniform, it is accurate to determine core.Base material unreels general using magnetic powder brake, tension detector, tension controller, sensor Automation constant tensile control is realized Deng electrical equipment.
(2) coated portions
Coated portion is the critical component of coating apparatus, design when, to take into full account the composition and performance of adhesive with And the coating accuracy (thin and thick of glue-spread) to be reached selects to be coated with gluing mode accordingly.
1st, for colloid system：During production, keep providing glue uniform state needed for anilox roll；For colloid system by lacquer disk(-sc), pneumatic The compositions such as membrane pump, glue bucket.
2nd, doctor blade system：Anilox roll site surface and the glue without site part surface is scraped off.Scraper base by pedestal, scrape Knife rest, scraper and pressue device composition.The eccentric shaft that pedestal one end of scraper mechanism is stretched out with scraper oscillating motor is connected. During operating, whole scraper mechanism bilateral reciprocation, scraper also keeps transverse movement on printing plate during lengthwise movement, its left and right fortune Dynamic stroke is in the range of 10mm-20mm.Moving left and right for scraper can decrease in scraper (side of picture and text on any is fixed Edge position) abrasion, extend the service life of scraper, reduce the occurrence frequency of knife line phenomenon.
3rd, anilox roll
, typically using anilox roll gluing coating, anilox roll is similar to printing plate cylinder, is quantitative transfer glue for dry compound machine Mechanism, anilox roll can be with quick-replaceable, to adapt to different glue-spread demands using the anilox roll of different ink cell depth.Pressure Roller uses Pneumatic Pressure, pressure adjustable.Scraper can carry out Three-bearing regulation, and glue bucket oscilaltion is suitable for the gluing of different-diameter Roller.The poor-performing of some plastic film substrate surface adhesion adhesives, in order to improve the Adhering capacity of such substrate surface, Seeking its surface tension value will reach 42~56mN/m.Surface that so can be before coating to base material carries out sided corona treatment in advance, Make its wildness, with the Adhering capacity on enhancing base materials surface.
(3) drying part
The many closed baking ovens using recyclable return air in drying part, can make full use of heat energy with energy saving.Entirely Baking oven carries out multistage return air, realizes that whirlwind is laid out on whole base material breadth, the moisture of substrate surface or solvent is fully volatilized.
Negative-pressure design, most of hot blast is used not to blow out baking oven and be recycled in whole baking oven, segmentation warm area can be certainly It is dynamic to carry out thermostatic control, so as to be conducive to the volatilization of moisture or solvent.Wind speed in baking oven is set from low to high, preposition air draft energy The solvent that initial stage volatilizees fully is discharged, most of waste gas does not participate in secondary cycle, so to ensure that waste gas is smoothly discharged.It is anti- Only the oven interior temperature imflammable solvent steam that ignites too high, causes baking oven to explode, and can open anti-explosion door structure using double, and set Corresponding warning system.
Baking oven exit is provided with EPC gas-liquid deviation correcting devices, can make base material transmit do not drift about, not fold, do not wander off, from And make the smooth transmission of painting cloth base material, and concordant with the second base material it is combined into finished product.
(4) composite portions
Using pneumatic set composite, press bonding roller clutch speed is fast, and composite structure pressure adjustable can guarantee that pressure force is whole, width Face is uniform, makes finished product smooth.Active composite roll can guarantee that painting cloth base material and second unreels base material at the same speed, and finished product has been not easy Wrinkle.
(5) cooling segments
Base material, if winding immediately, will certainly cause base material contraction distortion in the future, institute by after oven drying, temperature is higher To be cooled down before finished product winding.The linear resonance surface velocity of active cooling roller is synchronized with composite roll, and tension variation can be avoided to lead The composite membrane stretcher strain of cause.During design, the cornerite that finished product is formed on chill roll can be increased, to increase cooling contact surface.It is cold But carry-over pinch rolls can be connected thereto using swivel joint, be cooled down with recirculated cooling water, and effect is good, finished product is reached in winding Room temperature state.
(6) windings part
Winding typically uses air-expanding shaft, in order to load and unload refill.By to magnetic powder cluth, tension detector, tension force control The control of the electrical equipments such as device processed, sensor, realizes the automation constant tension coiling of base material.As base material take-up diameter constantly increases Plus, cause winding linear velocity constantly to become big, if winding refill rotating speed is constant, the pulling force of base material must be made to become big, finally to magnetic The effect resistance of clutch also accordingly increases.When pulling force reaches the frictional resistance that magnetic powder cluth is set up, magnetic powder cluth Output shaft with respect to input shaft just start skid so that the rotating speed of magnetic powder cluth output shaft subtracts with respect to the rotating speed of input shaft Small, the rotating speed of the winding shaft gear being engaged with accordingly reduces, and the winding linear velocity of such base material remains constant, realizes permanent Tension force and constant speed are batched.
Suitable coiling tension can be avoided lax in coating production period base material or wrinkled, it is ensured that the flatness of winding base material And elasticity.
(7) solidification is also named in, curing, and the film being combined exactly is put into drying room (curing chamber), makes polyurethane binder Host, curing agent cross-linking reaction and the process interacted by composite base material surface.The main purpose of curing be exactly make host and Curing agent is fully reacted in certain hour again, reaches best complex intensity；Next to that removing lower boiling residual solvent, such as acetic acid Ethyl ester etc..
Curing control is mainly curing temperature and the control of curing time, and curing temperature and curing time are by bonding used Determined by agent performance and the requirement of product final performance.Different adhesive kinds has different curing temperature and the times.Curing Temperature is too low, and less than 20 DEG C, the reaction of adhesive is extremely slow；Curing temperature is too high, and base material film additive is separated out, and influences composite membrane Performance and increase peculiar smell, such as curing time are oversize also to be influenceed compound film properties and increase peculiar smell, and this is mainly polyethylene film In processing aid separate out and cause.
The complex technique control point of ASA privacy protections film should be set according to such as table 5 below in the application：
Combination process state modulator in the application of table 5
Painting process production principle and technology of preparing:
Painting process is the three process of diaphragm production, and its production method is：Acted in certain temperature and pressure Under, by pressure-sensitive emulsion coating on production base material and by being wound after oven drying, make coated face that there is the performance for repeating to paste. Composite membrane is released through unwinding device during production enters glue spreading apparatus, the glue on glue spreader (anilox roll) surface is scraped off by scraper, Glue in site is transferred on gluing substrate surface when upper gum base materials are depressed and connect true, afterwards into baking oven, glue In moisture or solvent composition heating, blowing baking oven in vapor away.From baking oven out after, after cooling and shaping by winding fill Put that to batch be roll-shaped protective film.
Coating machine 26S Proteasome Structure and Function
Coating machine by：Control system, unreel system, coating system, drying heating system, the most of group of winding system five Into.The substantially light splitting roller gluing coating of coating equipment complex, anilox roll gluing coating.
(1) unreels part
Unreel and use air-expanding shaft supporting base material more, because air-expanding shaft is easy to operate, be conducive to handling to change base material refill, and And support force is uniform, it is accurate to determine core.Base material unreels general using magnetic powder brake, tension detector, tension controller, sensor Automation constant tensile control is realized Deng electrical equipment.
(2) coated portions
Coated portion is the critical component of coating apparatus, design when, to take into full account the composition and performance of adhesive with And the coating accuracy (thin and thick of glue-spread) to be reached selects to be coated with gluing mode accordingly, conventional gluing mode is big at present Cause light splitting roller gluing coating, anilox roll gluing coating.
(1) smooth roll gluing coating
This gluing coating generally uses two roller transfer coateds.Adjust the gap between its upper glue roller and applicator roll, so that it may To adjust the size of coating weight.The structure of whole coating head part is complex, it is desirable to upper glue roller, applicator roll, carry-over pinch rolls and scrape The machining accuracy and assembly precision of knife are high, and cost is also higher.Because this coating machine is mainly carried out using high-precision smooth roll Gluing is coated with, and preferably, coating weight size can also lead to Painting effect except being adjusted by the gap between upper glue roller and applicator roll The micro-positioning regulators for crossing coating blade are flexibly controlled, and coating accuracy is high.Application at present on coating equipment complex is also most wide.
(2) anilox roll gluing coating
My company's coating apparatus mainly carry out gluing coating using anilox roll at present.Its coating is uniform, and coating weight Compare accurate (but coating weight is difficult regulation).When being coated with anilox roll, coating weight mainly with the celophthalmia depth and glue of anilox roll The precision of species is relevant.The celophthalmia depth of anilox roll is deeper, and it is corresponding also more that glue is transferred to the amount that base material gets on from celophthalmia；Instead It, anilox roll net celophthalmia depth is more shallow, and the amount being transferred on base material also accordingly reduces.Also there are much relations with viscosity.Glue is sticked The too big and too small normal transfer for being all unfavorable for glue of degree.Glue viscosity great Yi is shifted, and too dilute then easy trickling makes gluing uneven, It is also easy to produce vertical or horizontal flowing water line.So, after the species of coating anilox roll and glue is decided, it is coated with to be difficult to regulation Amount, this is also the main cause that is restricted of application of web coatable roller.
The coating technique control point of ASA privacy protections film is mainly spread 0.5-1.0 in the application, using parabola Technique is set.Specific control technique should be set according to such as table 6 below
Coating process state modulator in the application of table 6
The pressure sensitive adhesive used by ASA co-extrusion section bar privacy protection films that the present invention is provided uses various acrylate monomer copolymerization Acrylate pressure sensitive adhesive system is obtained, low molecular compound in acrylic emulsion is reduced, coordinates outside cross-linking agent, improve adhesion, solved Phantom problem.

Claims (8)

1. a kind of ASA co-extrusion section bars privacy protection film, base material is BOPP film and aluminum plated PET film, and auxiliary material is ink, compound adhesive Water, pressure sensitive adhesive；Characterized in that, the pressure sensitive adhesive is made up of host acrylate copolymer emulsion and outside cross-linking agent；
The host acrylate copolymer emulsion, contains following percentage by weight raw material：
The total content of above raw material is 100%.
2. ASA co-extrusion section bars privacy protection film according to claim 1, it is characterised in that the outside cross-linking agent is selected from nitrogen third Pyridine SC-100, consumption is the 1.5-2% of host acrylate copolymer emulsion quality.
3. the ASA co-extrusion section bars privacy protection film according to claim 1, it is characterised in that the host acrylic acid is total to The preparation method of poly- emulsion is：
1) under the conditions of 60-66 DEG C, to the ammonium persulfate of the emulsified monomer mixed liquor of addition 4%-6%, 9-11% in reactor The solution of sodium bisulfite of solution and 9-11%, carries out initial stage polymerisation；
2) and then, while remaining emulsified monomer mixed liquor, remaining ammonium persulfate solution, remaining is at the uniform velocity added dropwise to reactor Solution of sodium bisulfite and monomer mixture, it is continuous to be added dropwise 3.9-4.1 hours, during temperature control at 60~66 DEG C；
3) after completion of dropping, be incubated 25-35min, then, at 60-66 DEG C add oxidant TBHP solution and Closing time solution of sodium bisulfite with reducing agent formaldehyde carries out residual monomer elimination reaction；
4) and then, reactor is cooled to less than 45 DEG C, plus the ammoniacal liquor regulation pH value after dilution；
5) wetting agent solution is added, is stirred, temperature of reaction kettle is down to less than 40 DEG C, after sampling detection is qualified, and latex is used 200 mesh net filtrations discharge, and obtain final product host acrylate copolymer emulsion.
4. the ASA co-extrusion section bars privacy protection film according to claim 1, it is characterised in that the emulsified monomer mixing The preparation method of liquid is：By the breast of the deionized water of 0.5-1.5%, the ammonium hydrogen carbonate of 0.04--0.1% and 0.02--0.05% Agent A-501 is mixed, and obtains final product emulsified monomer mixed liquor.
5. the ASA co-extrusion section bars privacy protection film according to claim 1, it is characterised in that the monomer mixture Preparation method is：By the deionized water of 38-40%, 0.2-0.4% emulsifying agent SE-10N, 0.4-0.6% acrylic acid AA, The methyl methacrylate MMA of 0.6-1% hydroxy-ethyl acrylate HEA, 1.5-3%, 10-20% butyl acrylate BA, The AAEM AAEM of 20-30% 2-ethyl hexyl acrylate 2-EHA and 0.6-1 is stirred and evenly mixed, and is obtained Monomer mixture.
6. according to the ASA co-extrusion section bars privacy protection film described in claim 1, it is characterised in that to the host acrylic acid for preparing Outside cross-linking agent SC-100 is added in copolymer emulsion, is stirred, be configured to diaphragm pressure sensitive adhesive.
7. a kind of preparation method of the ASA co-extrusion section bar privacy protection films described in claim 1, it is characterised in that the preparation Method is comprised the following steps：
Printing element is BOPP film, using printing plate cylinder by printing ink transfer to film, forms print film；By composite glue Two kinds of base materials of print film and aluminum plated PET film are combined into a kind of material；Pressure sensitive adhesive coating is reused, diaphragm is formed.
8. preparation method according to claim 7, when pressure sensitive adhesive is coated with, controls spread 0.5-1.0.
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