CN106182720A - A kind of production method of the pre-coating film utilizing flat film biaxial tension - Google Patents

A kind of production method of the pre-coating film utilizing flat film biaxial tension Download PDF

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Publication number
CN106182720A
CN106182720A CN201610555449.3A CN201610555449A CN106182720A CN 106182720 A CN106182720 A CN 106182720A CN 201610555449 A CN201610555449 A CN 201610555449A CN 106182720 A CN106182720 A CN 106182720A
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CN
China
Prior art keywords
coating film
basement membrane
production method
carried out
raw material
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN201610555449.3A
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Chinese (zh)
Inventor
李勇
宋萍
胡爱美
宋婕
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Anhui Dongrui Plastic Industry LLC
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Anhui Dongrui Plastic Industry LLC
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
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Application filed by Anhui Dongrui Plastic Industry LLC filed Critical Anhui Dongrui Plastic Industry LLC
Priority to CN201610555449.3A priority Critical patent/CN106182720A/en
Publication of CN106182720A publication Critical patent/CN106182720A/en
Pending legal-status Critical Current

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Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29CSHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C55/00Shaping by stretching, e.g. drawing through a die; Apparatus therefor
    • B29C55/02Shaping by stretching, e.g. drawing through a die; Apparatus therefor of plates or sheets
    • B29C55/10Shaping by stretching, e.g. drawing through a die; Apparatus therefor of plates or sheets multiaxial
    • B29C55/12Shaping by stretching, e.g. drawing through a die; Apparatus therefor of plates or sheets multiaxial biaxial
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29CSHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C37/00Component parts, details, accessories or auxiliary operations, not covered by group B29C33/00 or B29C35/00
    • B29C37/0025Applying surface layers, e.g. coatings, decorative layers, printed layers, to articles during shaping, e.g. in-mould printing
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B32LAYERED PRODUCTS
    • B32BLAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B37/00Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding
    • B32B37/06Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding characterised by the heating method
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B32LAYERED PRODUCTS
    • B32BLAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B37/00Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding
    • B32B37/10Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding characterised by the pressing technique, e.g. using action of vacuum or fluid pressure
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B32LAYERED PRODUCTS
    • B32BLAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B37/00Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding
    • B32B37/14Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding characterised by the properties of the layers
    • B32B37/15Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding characterised by the properties of the layers with at least one layer being manufactured and immediately laminated before reaching its stable state, e.g. in which a layer is extruded and laminated while in semi-molten state
    • B32B37/153Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding characterised by the properties of the layers with at least one layer being manufactured and immediately laminated before reaching its stable state, e.g. in which a layer is extruded and laminated while in semi-molten state at least one layer is extruded and immediately laminated while in semi-molten state
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29LINDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
    • B29L2007/00Flat articles, e.g. films or sheets

Abstract

The invention discloses the production method of a kind of pre-coating film utilizing flat film biaxial tension, step includes: (1) pretreatment of raw material;(2) raw material is sent into smelting furnace and carries out high-temperature fusion process, then fused raw material is extruded;(3) fused raw material of extrusion is carried out slab, cool down after forming casting film sheet and through tank;(4) first casting film sheet is sent into vertical machine drawing and is carried out longitudinal stretching, is then re-fed into transverse stretching machine and carries out cross directional stretch and become basement membrane;(5) basement membrane is carried out thickness measuring;(6) basement membrane is carried out dedusting;(7) will roll up on basement membrane, and carry out pre-treatment;(8) PUR is sent in extruder, after shear melting, be extruded into sialorrhea shape;(9) PUR that basement membrane and sialorrhea go out is combined under stress, it is thus achieved that pre-coating film, the most quickly cools down;(10) pre-coating film carries out tension process to increase its surface tension;(11) by pre-coating film rolling, cut, pack, put in storage.It is an advantage of the current invention that product quality is preferable, production efficiency is high.

Description

A kind of production method of the pre-coating film utilizing flat film biaxial tension
Technical field
The present invention relates to the production method of a kind of pre-coating film utilizing flat film biaxial tension, be mainly used in the life of pre-coating film Produce technical field.
Background technology
Pre-coating film basement membrane can use multiple production technology to produce, predominantly the production of curtain coating (Cast) method, inflation (inflation) method produces.Curtain coating (Cast) method is resin extruded machine fusion plastification, is squeezed by slit-type die orifice from head Go out, make melt be close on cooling roller, the most again through peeling off, position is stretched, cut, batch and obtain finished product, includes extrudate flow Prolong film and solvent cast film two kinds.Plastics are first extruded into pipe by inflation method extrusion molding, then make by the air being blown in pipe It expand into the tubular membrane of certain size continuously, according to extrusion and the difference of lead, is divided into following three types: above blow Method, flat blowing method, lower blowing method.But both approaches all also exists certain defect, therefore research and development one is more suitable for utilizing The production method of the pre-coating film of flat film biaxial tension is necessary.
By specialty equipment for coating film printing and basement membrane are combined with each other, formed paper unification product, this technology Do film coating technique (lamination).Through the leaflet of overlay film, its surface is brighter, smooth, and pattern is more bright-coloured, resistance to The performances such as mill, folding, tension, moisture-proof, resistance to chemical attack are the most all strengthened, the even visual defects of some in printing process Can be compensated for a great extent, therefore, not only extend service life, the aesthetic property of product also substantially increases.
Traditional Technology is mainly solvent-borne type and is i.e. coated with technology, aqueous and is i.e. coated with technology.Solvent-borne type is i.e. coated with technology to be had a lot Drawback, because the adhesive that it uses includes benzene kind solvent, has certain injury, easily directly results in leukemia and skin mistake human body Quick disease, and these diseases have certain incubation period;Additionally also need during overlay film dry and apply high pressure, so power consumption is big, efficiency Low, exist inflammable, explosive, poisonous, infringement workers ' health, pollute environment, the drawback of disaster hidden-trouble.Although aqueous be i.e. coated with technology with The high brightness of coated products, high-grade, easily reclaim, the feature such as pollution-free is favored by numerous clients deeply, but due to by water-base cement The restriction of body self-characteristic, compound fastness is low, and constant product quality is poor, therefore by bigger restriction on using.Meanwhile, Although aqueous is i.e. coated with technique and solves the benzene pollution problem that solvent-borne type is i.e. coated with, but there are a large amount of water of needs and clean and discharge cleaning in it Pollution problem after sewage, the most less than optimal environment-friendly type overlay film solution.Meanwhile, it is in product quality and production efficiency Aspect still has certain defect.
Summary of the invention
The technical problem to be solved in the present invention is to provide the production method of a kind of pre-coating film utilizing flat film biaxial tension, adopts Use biaxial tension method so that contractibility is good, thickness is uniformly good and has splendid operating flexibility.
The present invention is achieved through the following technical solutions.
A kind of production method of the pre-coating film utilizing flat film biaxial tension, step includes:
(1) pretreatment of raw material;
(2) raw material is sent into smelting furnace and carries out high-temperature fusion process, then fused raw material is extruded;
(3) fused raw material of extrusion is carried out slab, cool down after forming casting film sheet and through tank;
(4) first casting film sheet is sent into vertical machine drawing and is carried out longitudinal stretching, is then re-fed into transverse stretching machine and carries out cross directional stretch and become thin film I.e. basement membrane;
(5) basement membrane being carried out thickness measuring, if undesirable, repeat (4), if meeting the requirements, then carrying out trimming after traction;
(6) basement membrane is carried out dedusting;
(7) will roll up on basement membrane, and carry out pre-treatment;
(8) PUR is sent in extruder, after shear melting, be extruded into sialorrhea shape;
(9) PUR that basement membrane and sialorrhea go out is combined under stress, it is thus achieved that pre-coating film, carries out fast quickly cooling afterwards But;
(10) pre-coating film carries out tension process to increase its surface tension;
(11) by pre-coating film rolling, cut, pack, put in storage.
Further, the operation of (3) slab is: by the fused raw material of extrusion under pressure promotes, by elongated mouth Film, under external force, makes molten plastic be attached to rapidly the basement membrane making solid-state sheet material on sharp cooling roll surface.
Further, (3) External Force Acting selects airflow function.
Further, after (5) trimming, basement membrane is carried out sided corona treatment, then carries out eliminostatic process.
Further, (6) dust removal operation is: use non-uniform electric field, forms corona discharge and produces plasma, at electric field Under the effect of gradient, with the particulate pollutant generation inelastic collision in air adhering to, make charged ion, additional Electric field force, collected by dust collecting electrode.
Further, (7) pre-treatment is: basement membrane is carried out sided corona treatment.
Further, its surface after the extrusion, is sprayed gaseous oxidant, is made PUR surface oxidized by (8) PUR.
Further, (9) basement membrane and PUR compound, temperature controls at 70~100 DEG C, Stress control 16~ 25Mpa, speed controlling is 5~30m/min.
Beneficial effects of the present invention:
Use biaxial tension method to can be used to produce the plastic-based film that can not use stretching technique step by step, and can produce Extra-thin basement membrane, the thinnest thickness that can produce about 1UM, transparency is good, prepares product at hot strength, extension at break The aspect such as rate, percent thermal shrinkage all has and preferably shows, and in general, the method is easy to production application, and product quality is preferable, is The technique that cost performance is higher;This technique is simple, adjusts like that not necessarily like i.e. film coating technique and converts glue, only need to control temperature before producing Degree, pressure and speed, shutdown processes the simplest, need not clear up rubber-coated mechanism;Bubble, wrinkle will not be produced aborning The phenomenon such as pleat, demoulding, therefore, coated products quality is higher;During owing to there is not the combustible of organic solvent etc, because of This can be effectively prevented the generation of fire incident in production, and safety coefficient is higher.
Detailed description of the invention
Below according to embodiment, the present invention is described in further detail.
A kind of production method of the pre-coating film utilizing flat film biaxial tension, step includes:
(1) pretreatment of raw material.
(2) raw material is sent into smelting furnace and carries out high-temperature fusion process, then fused raw material is extruded.
(3) fused raw material of extrusion is carried out slab, cool down after forming casting film sheet and through tank, the operation of slab For: by the fused raw material of extrusion under pressure promotes, by elongated membrana oralis, under external force (air-flow) acts on, make melted moulding Material is attached to rapidly the basement membrane making solid-state sheet material on sharp cooling roll surface.
(4) first casting film sheet is sent into vertical machine drawing and is carried out longitudinal stretching, is then re-fed into transverse stretching machine and carries out cross directional stretch and become thin film.
(5) basement membrane being carried out thickness measuring, if undesirable, repeats (4), if meeting the requirements, then carrying out trimming after traction, After trimming, basement membrane is carried out sided corona treatment, then carries out eliminostatic process.
(6) basement membrane being carried out dedusting, dust removal operation is: use non-uniform electric field, forms corona discharge and produces plasma, Under the effect of electric-force gradient, with the particulate pollutant generation inelastic collision in air adhering to, make charged ion, In extra electric field power, collected by dust collecting electrode.
(7) will roll up on basement membrane, and carry out pre-treatment, pre-treatment is: basement membrane is carried out sided corona treatment.
(8) sending in extruder by PUR, be extruded into sialorrhea shape after shear melting, PUR is after the extrusion, right Its surface injection gaseous oxidant, makes PUR surface oxidized.
(9) being combined under stress by the PUR that basement membrane and sialorrhea go out, temperature controls at 70~100 DEG C, pressure control System is 16~25Mpa, and speed controlling is 5~30m/min, it is thus achieved that pre-coating film, the most quickly cools down.
(10) pre-coating film carries out tension process to increase its surface tension.
(11) by pre-coating film rolling, cut, pack, put in storage.
For the sided corona treatment of (5), owing to basement membrane majority is insulator, there are higher volume resistance and sheet resistance, institute Running at high speed the basement membrane of lower drawing, charged because of friction, electrostatic all has ill effect to printing, compound etc., it is necessary to disappeared Remove, simultaneously in order to surface is processed, improve its surface tension and reduce sheet resistance, use corona (electric spark) to process and Static eraser.Electric spark is made by what high frequency occurred, can produce ozone with this colleague, with plastic-based film surface action, make Generation oxy radical.
For (6) dedusting, it is plasma dedusting: not only removes various pollutant (TSP and various harmful gas), also adjusts Ionic equilibrium in joint air.
Utilize a large amount of active particles in plasma that pollutant poisonous, harmful, difficult degradation are directly decomposed Remove.This technology is mainly realized by two approach: one is under the high instantaneous energy effect of high energy electron, opens some The chemical bond of harmful gas molecule so that it is Direct Resolution becomes simple substance atom or harmless molecule;Two be a large amount of high energy electrons, from Son, excited state particle and oxygen-derived free radicals, hydroxyl free radical (free radical because having the strongest activity with unpaired electron) etc. Under effect, oxidation Decomposition becomes harmless products.
The method utilizing electric discharge, produces anion, under ion wind drives, is diffused into the interior space.Appropriate concentration Anion on the one hand have adjusted the ionic equilibrium in air, on the other hand, it can also remove the pollutant in air effectively. The anion of high concentration collides with the toxic chemical substance in air and pathogenic bacteria suspended particulate substance and makes it electronegative, and these bands The particulate matter of negative electricity will attract positively charged about particulate matter (antibacterial in usual air, virus, embrace son etc. be band just Electricity).Till this accumulation process is continued until that the weight of particulate matter be enough to make it drop to ground.
Contrast according to upper table it can be seen that for the tape casting that uses relative to tradition of biaxial tension method and blowing, The most all there is preferably effect.
Use biaxial tension method to can be used to produce the plastic-based film that can not use stretching technique step by step, and can produce Extra-thin basement membrane, the thinnest thickness that can produce about 1UM, transparency is good, prepares product at hot strength, extension at break The aspect such as rate, percent thermal shrinkage all has and preferably shows, and in general, the method is easy to production application, and product quality is preferable, is The technique that cost performance is higher.
Being struck off by the polymer segment on base material top layer, air produces a certain amount of extraordinary material, this material meeting the most around Combine with the molecule segment being interrupted, produce some polar groups.
Temperature is that Combined Processing wants factor, because the adhesive on pre-coating film is PUR, temperature determines PUR Molten condition, determines the PUR molecule penetrating power to BOPP thin film, leaflet layer of ink, paper etc. and diffusivity.To the greatest extent The compound raising of pipe contributes to the enhancing of bonding strength, but the too high meeting of temperature makes thin film produce shrinks, and product surface is shinny, rise Bubble, product produces gauffer.According to practical experience, temperature should control between 70~100 DEG C.
The surface of paper out-of-flatness, only under suitable pressure, the PUR of molten condition just can be completely covered print Brush product surface, joint product just light, coheres effective.Pressure is little, coheres loosely;Pressure is larger, is favorably improved thin film And the adhesion between paper products.But, if pressure is excessive, the most easily makes product produce gauffer, and easily make rubber rollers table Face is injured.Deformation, reduces the service life of rubber rollers.Along with the increase of pressure, make the contact pressure between rubber rollers and heating cylinder Power increases, and makes the spindle nose of two rollers, bearing load increase the weight of, abrasion aggravation, makes the load of drive system increase the weight of simultaneously, thus pressure is too Conference affects the service life of complete machine, and therefore Stress control is most widely suited 16~25Mpa.
The speed of recombination velocity determine adhesive on the pre-coating film fusing time on heating cylinder and thin film and The time of contact of paper.Recombination velocity is slow, and on BOPP thin film, the heated time of adhesive is relatively long, thin film and the pressing of paper Time is long, coheres effective, but production efficiency is low.Recombination velocity is fast, being subject on heating cylinder of the adhesive on BOPP thin film The heat time is short, and the time of contact of thin film and paper is short, binds weak effect.Therefore speed controlling is between 5 30m/min.
Above-described embodiment only for technology design and the feature of the present invention are described, its object is to allow and is familiar with this art Personage will appreciate that present invention and is carried out, and can not limit the scope of the invention with this.All according to the present invention The equivalence that spirit is made changes or modifies, and all should contain within the scope of the present invention.

Claims (8)

1. the production method of the pre-coating film utilizing flat film biaxial tension, it is characterised in that step includes:
(1) pretreatment of raw material;
(2) raw material is sent into smelting furnace and carries out high-temperature fusion process, then fused raw material is extruded;
(3) fused raw material of extrusion is carried out slab, cool down after forming casting film sheet and through tank;
(4) first casting film sheet is sent into vertical machine drawing and is carried out longitudinal stretching, is then re-fed into transverse stretching machine and carries out cross directional stretch and become thin film i.e. base Film;
(5) basement membrane being carried out thickness measuring, if undesirable, repeat (4), if meeting the requirements, then carrying out trimming after traction;
(6) basement membrane is carried out dedusting;
(7) will roll up on basement membrane, and carry out pre-treatment;
(8) PUR is sent in extruder, after shear melting, be extruded into sialorrhea shape;
(9) PUR that basement membrane and sialorrhea go out is combined under stress, it is thus achieved that pre-coating film, the most quickly cools down;
(10) pre-coating film carries out tension process to increase its surface tension;
(11) by pre-coating film rolling, cut, pack, put in storage.
The production method of the pre-coating film utilizing flat film biaxial tension the most according to claim 1, it is characterised in that (3) casting The operation of sheet is: by the fused raw material of extrusion under pressure promotes, by elongated membrana oralis, under external force, make to melt Plastics are attached to rapidly the basement membrane making solid-state sheet material on sharp cooling roll surface.
The production method of the pre-coating film utilizing flat film biaxial tension the most according to claim 2, it is characterised in that (3) outward Airflow function is selected in power effect.
The production method of the pre-coating film utilizing flat film biaxial tension the most according to claim 1, it is characterised in that (5) cut Behind limit, basement membrane is carried out sided corona treatment, then carries out eliminostatic process.
The production method of the pre-coating film utilizing flat film biaxial tension the most according to claim 1, it is characterised in that (6) remove Dirt operation is: use non-uniform electric field, forms corona discharge and produces plasma, under the effect of electric-force gradient, and in air Particulate pollutant generation inelastic collision and adhere to, make charged ion, in extra electric field power, received by dust collecting electrode Collection.
6. profit requires the production method of the pre-coating film utilizing flat film biaxial tension described in 1, it is characterised in that (7) pre-treatment is: Basement membrane is carried out sided corona treatment.
7. profit requires the production method of the pre-coating film utilizing flat film biaxial tension described in 1, it is characterised in that (8) PUR exists After extrusion, gaseous oxidant is sprayed on its surface, makes PUR surface oxidized.
8. profit requires the production method of the pre-coating film utilizing flat film biaxial tension described in 1, it is characterised in that (9) basement membrane and heat Being combined of melten gel, temperature controls at 70~100 DEG C, and Stress control is 16~25Mpa, and speed controlling is 5~30m/min.
CN201610555449.3A 2016-07-14 2016-07-14 A kind of production method of the pre-coating film utilizing flat film biaxial tension Pending CN106182720A (en)

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110763626A (en) * 2019-10-30 2020-02-07 南京玻璃纤维研究设计院有限公司 Method for detecting film-coating fastness of PTFE film-coated filter material and sample laminating machine
ES2942062A1 (en) * 2021-11-26 2023-05-29 Vazquez Ortega Jose Vicente PROCEDURE FOR CLADDING PROFILE AND OBTAINED PROFILE (Machine-translation by Google Translate, not legally binding)

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Publication number Priority date Publication date Assignee Title
US7288291B2 (en) * 2002-03-14 2007-10-30 Metso Paper, Inc. Method for forming a film, by using electrostatic forces
CN101396892A (en) * 2008-10-22 2009-04-01 北京康得新复合材料股份有限公司 Metallization biaxial stretching polyester (BOPET) pre-coating film using chemical treatment
CN202965391U (en) * 2012-09-13 2013-06-05 北京康得新复合材料股份有限公司 No-primer lamination film and biaxially oriented polypropylene film of no-primer lamination film
CN103342970A (en) * 2013-07-12 2013-10-09 浙江顺福印业有限公司 High-efficiency environment-friendly pre-coated film processing technology
CN104589676A (en) * 2014-11-28 2015-05-06 桐城市福润包装材料有限公司 Production process of BOPP thin film

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7288291B2 (en) * 2002-03-14 2007-10-30 Metso Paper, Inc. Method for forming a film, by using electrostatic forces
CN101396892A (en) * 2008-10-22 2009-04-01 北京康得新复合材料股份有限公司 Metallization biaxial stretching polyester (BOPET) pre-coating film using chemical treatment
CN202965391U (en) * 2012-09-13 2013-06-05 北京康得新复合材料股份有限公司 No-primer lamination film and biaxially oriented polypropylene film of no-primer lamination film
CN103342970A (en) * 2013-07-12 2013-10-09 浙江顺福印业有限公司 High-efficiency environment-friendly pre-coated film processing technology
CN104589676A (en) * 2014-11-28 2015-05-06 桐城市福润包装材料有限公司 Production process of BOPP thin film

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110763626A (en) * 2019-10-30 2020-02-07 南京玻璃纤维研究设计院有限公司 Method for detecting film-coating fastness of PTFE film-coated filter material and sample laminating machine
ES2942062A1 (en) * 2021-11-26 2023-05-29 Vazquez Ortega Jose Vicente PROCEDURE FOR CLADDING PROFILE AND OBTAINED PROFILE (Machine-translation by Google Translate, not legally binding)

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Application publication date: 20161207