CN108226056A - A kind of method for improving form and aspect accuracy of detection - Google Patents

A kind of method for improving form and aspect accuracy of detection Download PDF

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Publication number
CN108226056A
CN108226056A CN201810142868.3A CN201810142868A CN108226056A CN 108226056 A CN108226056 A CN 108226056A CN 201810142868 A CN201810142868 A CN 201810142868A CN 108226056 A CN108226056 A CN 108226056A
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CN
China
Prior art keywords
test point
finished film
values
value
threshold value
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CN201810142868.3A
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Chinese (zh)
Inventor
余赞
曾庆林
韦雪雪
罗臻
张勇军
杜建军
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常德金德新材料科技股份有限公司
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Priority to CN201810142868.3A priority Critical patent/CN108226056A/en
Publication of CN108226056A publication Critical patent/CN108226056A/en

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    • GPHYSICS
    • G01MEASURING; TESTING
    • G01NINVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N21/00Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
    • G01N21/17Systems in which incident light is modified in accordance with the properties of the material investigated
    • G01N21/25Colour; Spectral properties, i.e. comparison of effect of material on the light at two or more different wavelengths or wavelength bands

Abstract

A kind of method for raising form and aspect accuracy of detection that the application provides, is related to extrusion coating paper PET film form and aspect detection technique field.Method includes:Take finished film and art post paperboard spare, wherein finished film includes the basement membrane and transfer layer of fitting, transfer layer obtains fitting paper after being bonded with the shiny surface of art post paperboard by transfer glue, fitting paper is placed on temperature to be taken out after heat preservation 8s~12s under 80 DEG C~90 DEG C environment, tear the basement membrane on fitting paper surface, obtain test sample plate, detect the form and aspect parameter of test sample plate, the form and aspect parameter of detection and standard form and aspect threshold value are compared, the qualification rate of test sample plate is calculated by two kinds of methods, so as to judge whether finished film is qualified.Compared with prior art, the method that the application provides, during the test, wrinkling will not occur for tested article, and there is no diffused lights, and test result accurately and reliably, effectively controls the quality of production of finished film, so that the printing quality of extrusion coating paper is guaranteed.

Description

A kind of method for improving form and aspect accuracy of detection
Technical field
This application involves extrusion coating paper PET film form and aspect detection technique field more particularly to a kind of raising form and aspect accuracy of detection Method.
Background technology
Extrusion coating paper PET (Polyethylene terephthalate, polyethylene terephthalate) transfer membranes or Composite membrane is also referred to as finished film, is made of basement membrane and the aluminium layer with raster effects or laser effect.Wherein, basement membrane plays carrying and makees With being typically used as the carrier of aluminium coated, aluminium layer generates metallic luster primarily as reflecting layer.Finished film form and aspect are intuitive anti- An index of its quality is reflected, form and aspect are the general names of gloss and color, mainly including bright darkness L values, red green degree a values, champac degree b Value, wherein L values are bigger, represent that product is brighter and whiten, otherwise it is to black that product is darker;A values are expressed as red green degree, and a values are bigger, Product colour is rubescent, otherwise product colour greening;B values represent champac degree, and b values are bigger, product colour jaundice, otherwise product colour It turns blue.
Finished film form and aspect are detected in traditional handicraft, finished film is directly detected using color difference meter, finished film is placed on one On horizontal plane or vertical plane, the measured hole of color difference meter is directed at, is measured.Hold during the test since finished film quality is softer It creases easily, surface bends, and there are diffused lights in measurement process for curved surface, the light of measured hole acquisition are generated dry It disturbs, so as to make measurement result, there are large errors.With such finished film and art post paperboard it is compound after, extrusion coating paper and standard specimen extrusion coating paper Between form and aspect differ greatly, influence the quality of colour of product, and then influence printing quality.
Now, demand of the market to extrusion coating paper increasingly increases, also higher and higher to the printing quality requirement of extrusion coating paper how Form and aspect accuracy of detection is improved, is a urgent problem to be solved.
Invention content
This application provides a kind of methods for improving form and aspect accuracy of detection, inaccurate to solve the detection of finished film form and aspect, from And the problem of influencing extrusion coating paper printing quality.
A kind of method for improving form and aspect accuracy of detection, the described method comprises the following steps:
Take finished film and art post paperboard spare, wherein, the finished film includes the basement membrane of fitting, transfer layer;
The transfer layer with the shiny surface of the art post paperboard by transfer glue is bonded, obtains fitting paper;
It is taken out after the fitting paper is kept the temperature 8s~12s under 80 DEG C~90 DEG C temperature environments;
The basement membrane on the fitting paper surface is torn, obtains test sample plate;
Detect the form and aspect parameter of the test sample plate transfer layer side;
According to the form and aspect parameter and standard form and aspect threshold value, judge whether the finished film is qualified.
Optionally, the form and aspect parameter includes bright darkness L values, red green degree a values, champac degree b values, the standard form and aspect threshold value Including bright darkness threshold value, red green degree threshold value, champac degree threshold value;
It is described to judge whether the finished film is qualified according to the form and aspect parameter and standard form and aspect threshold value, including:
N number of test point is taken in the test sample plate, tests form and aspect, wherein N is integer;
If the bright darkness L values of any one of test point, the red green degree a values, the champac degree b values exist respectively The bright darkness threshold value, the red green degree threshold value, within the champac degree threshold range, then the form and aspect of the test point are qualified; Otherwise, the form and aspect of the test point are unqualified;
If for the qualification rate of N number of test point in the range of regulation qualification rate, the finished film is qualified, otherwise, described Finished film is unqualified.
Optionally, the form and aspect parameter includes bright darkness L values, red green degree a values, champac degree b values, value of chromatism Δ E, the mark Quasi- form and aspect threshold value includes color difference threshold;
It is described to judge whether the finished film is qualified according to the form and aspect parameter and standard form and aspect threshold value, including:
N number of test point is taken in the test sample plate, tests form and aspect, wherein N is integer;
According to formulaThe value of chromatism of each test point is calculated, wherein the Δ L= L-L1, the Δ a=a-a1, the Δ b=b-b1, the L is the bright opacity value of the test point, and a is the test point Red greenness index, the b be the test point champac angle value, the L1For the bright opacity value of standard, a1For the red green degree of standard Value, the b1For standard champac angle value;
If the value of chromatism Δ E of any one of test point within the scope of the color difference threshold, the test point The form and aspect are qualified;Otherwise, the form and aspect of the test point are unqualified;
If for the qualification rate of N number of test point in the range of regulation qualification rate, the finished film is qualified, otherwise, described Finished film is unqualified.
Optionally, it is pasted by the transfer layer of the finished film and the shiny surface of the art post paperboard by transfer glue It closes, it is described before being taken out after the fitting paper to be kept the temperature to 8s~12s under 80 DEG C~90 DEG C environment after obtaining fitting paper Method further includes:The basement membrane for being bonded paper surface is gently scraped with lining bar is scraped.
Optionally, the transfer layer is the aluminium layer with raster effects or laser effect.
Optionally, the transfer glue is acrylic ester polymerization lotion.
Optionally, the finished film is PET transfer membranes or PET composite membranes.
The technical solution that the application provides includes following advantageous effects:
The method for a kind of raising form and aspect accuracy of detection that the application provides, with the prior art by directly measuring finished film Form and aspect are compared, and this method shifts the transfer layer in finished film by imitating the process of compounding machine composite paper, with transfer glue It onto art post paperboard, tears basement membrane and is fabricated to test sample plate, form and aspect detection then is carried out to test sample plate.In test sample plate transfer layer Multiple test points are chosen on side, form and aspect parameter and the standard form and aspect threshold value of each test point are compared, and calculate test point Qualification rate, and thus judge the qualification rate of finished film.Test sample plate quality is harder, is not in that corrugation is existing during the test As, there is no diffused lights, and form and aspect accuracy of detection is high, and test result accurately and reliably, effectively controls the quality of production of finished film, from And the printing quality of extrusion coating paper is guaranteed.
Description of the drawings
In order to illustrate more clearly of the technical solution of the application, letter will be made to attached drawing needed in the embodiment below Singly introduce, it should be apparent that, for those of ordinary skills, without having to pay creative labor, It can also be obtained according to these attached drawings other attached drawings.
Fig. 1 is a kind of method for improving form and aspect accuracy of detection provided by the embodiments of the present application.
Fig. 2 is the side of a kind of raising form and aspect accuracy of detection provided by the embodiments of the present application being further processed to fitting paper Method.
Specific embodiment
Attached drawing 1 is please referred to, the figure shows a kind of method for improving form and aspect accuracy of detection provided in this embodiment is specifically real Apply step.
A kind of method for improving form and aspect accuracy of detection provided by the embodiments of the present application, including:
Step 1:Take finished film and art post paperboard spare, wherein, finished film includes the basement membrane of fitting, transfer layer.
Finished film is made of basement membrane, transfer layer in the embodiment of the present application, and wherein transfer layer is made of coating, metal layer.Mesh Preceding common coating is substantially based on acrylic acid and nitrocellulose resin system, and solid content is generally 16%~18%, coating warp Net Kun is applied on basement membrane, after drying tunnel is dried and is molded, makes the PET film become with raster effects or laser effect. Hereafter, one layer of metal layer is plated in PET film, collectively constitutes transfer layer.Metal layer causes raster effects or laser effect more Significantly.
Art post paperboard generally selects cigarette packet art post paperboard in the embodiment of the present application.The high cigarette packet art post paperboard paper of quality is smooth, nothing Streak, spot, bumps, buckling deformation can effectively improve accurate testing degree using the art post paperboard.
Step 2:Transfer layer with the shiny surface of art post paperboard by transfer glue is bonded, obtains fitting paper.
Make be bonded paper during, take transfer glue uniform fold on the transfer layer, afterwards with art post paperboard shiny surface with It, which is bonded, obtains fitting paper, and basement membrane is on the outside at this time.To ensure that thin and thick is fully covered on transfer layer uniformly to be shifted during this Glue, and fitted closely with art post paperboard, fitting paper meets certain flatness requirement.It just can guarantee transfer layer in work below in this way Test sample plate can all and be uniformly transferred in sequence.
Transfer glue can also be uniformly dropped on art post paperboard shiny surface, then be bonded with transfer layer with it, basement membrane on the outside, Equally, it need to ensure that the two fits closely in this process, transfer layer comes into full contact with transfer glue and guarantees transfer layer whole It is transferred to test sample plate.
Step 3:It is taken out after fitting paper is kept the temperature 8s~12s under 80 DEG C~90 DEG C temperature environments.
This process can carry out in qualified baking oven, and the selection of the baking oven can be according to the institute of compounding machine extrusion coating paper process The technological parameter of use is selected.Such as the temperature used during compounding machine composite paper is 90 DEG C, the time used is 10s, then When oven temperature is set as 90 DEG C, soaking time is set as 10s, and less than 10s, being bonded transfer glue on paper cannot parch, and cause Transfer layer cannot be transferred completely into test sample plate;Higher than 10s, transfer glue can be cooked-on on fitting paper, similary to influence transfer The transfer effect of layer.When oven temperature is relatively low, soaking time is more relatively long.
Step 4:The basement membrane on fitting paper surface is torn, obtains test sample plate.
The exposed both sides of test sample plate are respectively the opposite face and transfer layer of art post paperboard shiny surface.
Step 5:Detect the form and aspect parameter of test sample plate transfer layer side.
Test sample plate transfer layer one is placed on color difference meter, according to the difference of judgment method, detects related colour phase parameter, Such as bright darkness L values, red green degree a values, champac degree b values or value of chromatism Δ E.The type and model of color difference meter are not done in this application Limitation, specific those skilled in the art can be selected according to service condition.
The value range of bright darkness L values is bigger for 0~100, L values, it is white to show that test sample plate gets over brighten the hair, otherwise test sample plate Darker nigrescence;The value range of red green degree a values and champac degree b values is more than 0 for -120~120, a values, represents red, numerical value is bigger Redder, a values are less than 0, represent green, and numerical value is smaller greener;B values are more than 0, represent yellow, and the bigger numerical value the more yellow, and b values are less than 0, Represent blue, numerical value is smaller more blue.
Value of chromatism Δ E value ranges include 0~0.5,0.5~1.5,1.5~3.0,3.0~6.0, more than 6.0, aberration journey Degree is respectively small aberration, smaller aberration, small aberration, big aberration, very big aberration.
Step 6:According to form and aspect parameter and standard form and aspect threshold value, judge whether finished film is qualified.
Standard form and aspect threshold value is a value range, for example provides that bright darkness threshold value is 89~91, and red green degree threshold value is -0.3 ~-0.1, champac degree threshold value are -0.2~0, and color difference threshold is 0~0.5.
It can be by judging whether the bright darkness L values of each test point in test sample plate, red green degree a values, champac degree b values are being marked Whether accurate bright darkness threshold value, red green degree threshold value in champac degree threshold range, calculate the qualification rate of test sample plate in regulation qualification rate In the range of, judge whether finished film is qualified;Also whether can marked by judging the value of chromatism Δ E of each test point in test sample plate In the range of quasi- color difference threshold, the qualification rate of test sample plate is calculated whether in the range of regulation qualification rate, judges whether finished film closes Lattice.
If the form and aspect qualification rate of test sample plate in the range of regulation qualification rate, represents finished film qualification, otherwise finished film It is unqualified.
The batch finished film is qualified, then in rear process, continues to produce according to the various process parameters of the batch finished film;It is no Then, various process parameters are adjusted, are produced again, and finished film is tested again according to above-mentioned steps.
The method that the application provides imitates compounding machine recombination process, and the transfer layer of metal-containing layer is turned by transfer glue It moves on in art post paperboard, forms test sample plate, test sample plate quality is harder, is not in wrinkling during the test, does not deposit In diffused light, test result accurately and reliably, effectively controls the quality of production of finished film, so that the printing quality of extrusion coating paper It is guaranteed.
Optionally, form and aspect parameter includes bright darkness L values, red green degree a values, champac degree b values, and standard form and aspect threshold value includes bright dark Spend threshold value, red green degree threshold value, champac degree threshold value.
According to the form and aspect parameter of test sample plate and standard form and aspect threshold value, judge whether finished film is qualified, including:In test specimens N number of test point is taken on plate, wherein N is integer, and form and aspect are tested with color difference meter.If the bright darkness L values of any one test point, red green A values, champac degree b values are spent respectively within bright darkness threshold value, red green degree threshold value, champac degree threshold range, then the color of the test point It is mutually qualified;Otherwise, the form and aspect of the test point are unqualified.For example the bright darkness threshold value of standard form and aspect prescribed threshold is 89~91, then exists Bright darkness L values in the range of this are qualification;Provide that red green degree threshold value is -0.3~-0.1, then red green degree a within this range Value is qualification, while represents that the key colour of test sample plate is more biased towards in light green color;It is -0.2~0 to provide champac degree threshold value, Then champac degree b values within this range are qualification, while represent that the key colour of test sample plate is more biased towards in light blue.
If the qualification rate of N number of test point is in the range of regulation qualification rate, finished film is qualified, and otherwise, finished film is unqualified.
Optionally, form and aspect parameter includes bright darkness L values, red green degree a values, champac degree b values, value of chromatism Δ E, standard form and aspect threshold Value includes color difference threshold.
According to the form and aspect parameter of test sample plate and standard form and aspect threshold value, judge whether finished film is qualified, including:In test specimens N number of test point is taken on plate, wherein N is integer, and form and aspect are tested with color difference meter.According to formulaMeter Calculate the value of chromatism of each test point, wherein Δ L=L-L1, Δ a=a-a1, Δ b=b-b1, L is the bright opacity value of test point, and a is The red greenness index of test point, champac angle value of the b for test point, L1For the bright opacity value of standard, a1For the red greenness index of standard, b1For mark Quasi- champac angle value.For example regulation color difference threshold is 0~0.5, if value of chromatism Δ E is within this range, there are small for test sample plate Aberration can assert the test point for qualification;Otherwise, the test point is unqualified.Herein, the bright opacity value L of standard1, the red green degree of standard Value a1, standard champac angle value b1For a particular value, such as the bright opacity value L of standard1It is 90, the red greenness index a of standard1It is -0.2, standard Champac angle value b1It is -0.1.
Can preliminary judgement do finished film by the value of Δ L, Δ a, Δ b, Δ L is if it is positive value, then it represents that finished film ratio Standard sample raw white is bright, if it is negative value, then it represents that than master sample dark;Δ a is if it is positive value, then it represents that finished film compares standard Sample is red or fewer than master sample green, if it is negative value, then it represents that finished film is greener than master sample or fewer than master sample red;Δ B is if it is positive value, then it represents that finished film is more yellow than master sample or fewer than master sample blue, if it is negative value, then it represents that finished film It is more blue than master sample or fewer than master sample yellow.
Equally, if the qualification rate of N number of test point is in the range of regulation qualification rate, finished film is qualified, and otherwise, finished film is not It is qualified.
Optionally, after step 2, before step 3, step 21 is further included, i.e., gently scrapes fitting paper surface with scraping lining bar Basement membrane, as shown in Fig. 2, be to fitting paper be for further processing.This process be imitate it is compound in pressure roller process, with scraping sample Stick such as from left to right, from top to bottom, gently scrapes the basement membrane on fitting paper surface, obtains smooth fitting paper in a direction.In this way On the one hand finished film can be made preferably to be bonded with art post paperboard, transfer glue on the other hand can be made to be evenly distributed on finished film and turned It moves on layer, ensures that transfer layer is shifted completely.
Optionally, transfer layer is the aluminium layer with raster effects or laser effect.The basement membrane of dope layer is laid with by molding After technique, after making is in the PET film with raster effects or laser effect, then last layer aluminium layer is plated.Aluminum layer thickness is 0.25 μ M~0.3 μm primarily as reflecting layer, generates metallic luster.The extrusion coating paper bright in color aluminized, metal sense is strong, printing is bright Beautiful, aesthetics is strong, substantially increases the printing quality of extrusion coating paper.
Optionally, transfer glue is acrylic ester polymerization lotion.Transfer glue is to be exclusively used in the adhesive of transfer paper, in cigarette Straw bag dress sector application is extensive.Transfer layer can be completely transferred in art post paperboard by transfer glue drying and forming-film in baking oven after dry, And realize being completely exfoliated for basement membrane and transfer layer.
Optionally, finished film is PET transfer membranes or PET composite membranes.PET transfer membranes are also known as heat transfer film, have excellent Characteristic, such as tensile strength is high, thermal stability is good, percent thermal shrinkage is low, surfacing is bright and clean, fissility is good.PET transfer membranes are main It is positioned over after vacuum aluminum-plating machine aluminizes as vacuum aluminum-coated carrier, that is, by basement membrane, is coated with transfer glue and is carried out with paper Compound, after basement membrane is removed, aluminium molecular layer is transferred to paper surface by adhesive action, forms paperboard of aluminizing.Paperboard aluminized both With beautiful metal-like, and with degradable recyclable beneficial environmental properties, by extensive use.
PET composite membranes equally can also be used for being bonded the PET film for making wrapping paper with paper with PET transfer membranes.PET is compound Film has good printing adaptability, is conducive to improve the class of product, has good gas, moisture barrier.
Below by taking the finished film using the desk-top color difference meter test A4 paper sizes of Ai Seli Color I7 as an example, carry out specifically It is bright.
Prepare associated materials:Art post paperboard, the finished film of A4 paper sizes (PET transfer membranes), transfer glue, the drop of A4 sizes It manages, scrape lining bar, baking oven.Wherein, dropper is used as dropping in transfer glue in art post paperboard;Oven temperature is set as 90 DEG C, is bonded paper 10s is stored in baking oven.
The range of required standard form and aspect threshold value, wherein bright darkness threshold value is 89~91, red green degree threshold value is -0.3~-0.1, Champac degree threshold value is -0.2~0;Provide that qualification rate is ranging from more than or equal to 80%.
Test sample plate is made by method provided by the embodiments of the present application, at least ten is taken to test at random in test sample plate Point, go forward side by side line label such as 1#, 2# ..., generally need to be related in the upper and lower, left and right of A4 paper, medium position, will take in advance The measurement hole site of the test sample plate alignment desk-top color difference meters of Ai Seli Color I7 of good point measures, and record each point Data, including bright darkness L values, red green degree a values, champac degree b values, which can automatically generate table.
It is compared by measurement data and standard form and aspect threshold value, judges qualified number of checkpoints, and calculate qualification rate, If qualification rate is more than or equal to 80%, finished film is can determine that as qualification, process various process parameters before rear process making can continue to use Continue to produce;It if qualification rate is less than 80%, can determine that finished film is unqualified, adjust reproduction after various process parameters in time.
Another judgment method is whether in standard aberration threshold range to judge whether finished film is qualified by value of chromatism.
Required standard color difference threshold is 0~0.5, the bright opacity value L of standard1It is 90, the red greenness index a of standard1It is -0.2, standard Champac angle value b1It is -0.1;Provide that qualification rate is ranging from more than or equal to 80%.
By measuring every form and aspect parameter of test point, including bright darkness L values, it is red it is green degree a values, champac degree b values, by with The bright opacity value L of standard1, the red greenness index a of standard1, standard champac angle value b1, the bright darkness difference DELTA L of each test point is calculated, it is red green Difference DELTA a, champac degree difference DELTA b are spent, and thus obtains the value of chromatism Δ E of each test point, is compared with standard color difference threshold Compared with calculating qualification rate if qualification rate is more than or equal to 80%, can determine that finished film as qualification, and rear process making can continue to use preceding work Sequence various process parameters continue to produce;If qualification rate is less than 80%, it can determine that finished film is unqualified, the every technique of adjustment in time Reproduction after parameter.
It should be noted that term " comprising ", "comprising" or its any other variant are intended to the packet of nonexcludability Contain, so that article or equipment including a series of elements not only include those elements, but also including not arranging clearly It the other element that goes out or further includes as elements inherent to such a process, method, article, or device.Not more In the case of limitation, the element that is limited by sentence "including a ...", it is not excluded that in the process including the element, side Also there are other identical elements in method, article or equipment.
The above is only the specific embodiment of the application, is made skilled artisans appreciate that or realizing this Shen Please.A variety of modifications of these embodiments will be apparent to one skilled in the art, it is as defined herein General Principle can in other embodiments be realized in the case where not departing from spirit herein or range.Therefore, the application The embodiments shown herein is not intended to be limited to, and is to fit to and the principles and novel features disclosed herein phase one The most wide range caused.
It should be understood that the content that the application is not limited to be described above and be shown in the drawings, and can To carry out various modifications and change without departing from the scope.Scope of the present application is only limited by appended claim.

Claims (7)

  1. A kind of 1. method for improving form and aspect accuracy of detection, which is characterized in that the described method comprises the following steps:
    Take finished film and art post paperboard spare, wherein, the finished film includes the basement membrane of fitting, transfer layer;
    The transfer layer with the shiny surface of the art post paperboard by transfer glue is bonded, obtains fitting paper;
    It is taken out after the fitting paper is kept the temperature 8s~12s under 80 DEG C~90 DEG C temperature environments;
    The basement membrane on the fitting paper surface is torn, obtains test sample plate;
    Detect the form and aspect parameter of the test sample plate transfer layer side;
    According to the form and aspect parameter and standard form and aspect threshold value, judge whether the finished film is qualified.
  2. A kind of 2. method for improving form and aspect accuracy of detection according to claim 1, which is characterized in that the form and aspect parameter packet Bright darkness L values, red green degree a values, champac degree b values are included, the standard form and aspect threshold value includes bright darkness threshold value, red green degree threshold value, Huang Blue degree threshold value;
    It is described to judge whether the finished film is qualified according to the form and aspect parameter and standard form and aspect threshold value, including:
    N number of test point is taken in the test sample plate, tests form and aspect, wherein N is integer;
    If the bright darkness L values of any one of test point, the red green degree a values, the champac degree b values are respectively described Bright darkness threshold value, the red green degree threshold value, in the champac degree threshold range, then the form and aspect of the test point are qualified;Otherwise, institute The form and aspect for stating test point are unqualified;
    If for the qualification rate of N number of test point in the range of regulation qualification rate, the finished film is qualified, otherwise, the finished product Film is unqualified.
  3. A kind of 3. method for improving form and aspect accuracy of detection according to claim 1, which is characterized in that the form and aspect parameter packet Bright darkness L values, red green degree a values, champac degree b values, value of chromatism Δ E are included, the standard form and aspect threshold value includes color difference threshold;
    It is described to judge whether the finished film is qualified according to the form and aspect parameter and standard form and aspect threshold value, including:
    N number of test point is taken in the test sample plate, tests form and aspect, wherein N is integer;
    According to formulaThe value of chromatism of each test point is calculated, wherein the Δ L=L- L1, the Δ a=a-a1, the Δ b=b-b1, the L is the bright opacity value of the test point, and a is the test point Red greenness index, champac angle value of the b for the test point, the L1For the bright opacity value of standard, a1For the red green degree of standard Value, the b1For standard champac angle value;
    If the value of chromatism Δ E of any one of test point is within the scope of the color difference threshold, the form and aspect of the test point It is qualified;Otherwise, the form and aspect of the test point are unqualified;
    If for the qualification rate of N number of test point in the range of regulation qualification rate, the finished film is qualified, otherwise, the finished product Film is unqualified.
  4. 4. a kind of method for improving form and aspect accuracy of detection according to claim 1, which is characterized in that by the finished film The transfer layer be bonded with the shiny surface of the art post paperboard by transfer glue, after obtaining fitting paper, by the fitting Paper is kept the temperature under 80 DEG C~90 DEG C environment take out after 8s~12s before, the method further includes:The fitting is gently scraped with lining bar is scraped The basement membrane on paper surface.
  5. 5. a kind of method for improving form and aspect accuracy of detection according to claim 1, which is characterized in that the transfer layer includes Aluminium layer with raster effects or laser effect.
  6. 6. a kind of method for improving form and aspect accuracy of detection according to claim 1, which is characterized in that the transfer glue is Acrylic ester polymerization lotion.
  7. 7. a kind of method for improving form and aspect accuracy of detection according to claim 1, which is characterized in that the finished film includes PET transfer membranes or PET composite membranes.
CN201810142868.3A 2018-02-11 2018-02-11 A kind of method for improving form and aspect accuracy of detection CN108226056A (en)

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