CN106393744A - Degradable material and surface treatment method and application thereof - Google Patents
Degradable material and surface treatment method and application thereof Download PDFInfo
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- CN106393744A CN106393744A CN201610569221.XA CN201610569221A CN106393744A CN 106393744 A CN106393744 A CN 106393744A CN 201610569221 A CN201610569221 A CN 201610569221A CN 106393744 A CN106393744 A CN 106393744A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C71/00—After-treatment of articles without altering their shape; Apparatus therefor
- B29C71/0081—After-treatment of articles without altering their shape; Apparatus therefor using an electric field, e.g. for electrostatic charging
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
- B29K2067/00—Use of polyesters or derivatives thereof, as moulding material
- B29K2067/04—Polyesters derived from hydroxycarboxylic acids
- B29K2067/046—PLA, i.e. polylactic acid or polylactide
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
- B29L2007/00—Flat articles, e.g. films or sheets
- B29L2007/001—Flat articles, e.g. films or sheets having irregular or rough surfaces
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- Treatments Of Macromolecular Shaped Articles (AREA)
- Manufacture Of Macromolecular Shaped Articles (AREA)
Abstract
The invention discloses a degradable material and a preparation method and application thereof. The preparation method comprises the steps that degradable raw materials are cut into pieces with the length being 100mm and the width being 80mm; and the pieces are subjected to corona treatment with the corona power being 0.7-1.5KVA and the corona time being 10-40 s, so that the degradable material is obtained. The degradable material is a polylactic acid (PLA) film. After corona treatment, obvious irregular concaves and convexes emerge on the surface of the PLA film and become denser with increasing of the treatment power, and the roughness is improved. Under the effect of a high-voltage electric field, electron flow has powerful impact on the PLA film, the surface of the film is roughened with the surface tension increased by 76% from 34 dyn/cm to 60 dyn/cm, and the wetability and the printing adaptability of the surface of the film are greatly improved.
Description
Technical field
The invention belongs to material and technical field of electrochemistry, particularly to a kind of degradation material and its surface treatment method
With application.
Background technology
Biodegradable material refer under certain condition, certain time interior energy dropped by microorganisms such as antibacterial, mycete, algae
The macromolecular material of solution.Real Biodegradable high molecular, in the environment of with the presence of water, can be degraded by enzyme or microbial hydrolysis,
So that polymeric main chain interruption, molecular weight tapers into, so that eventually becoming monomer or being metabolized to carbon dioxide and water；Wherein
Main inclusion biodegradable ceramic and biodegradable plastic two class.
Biodegradable plastic can be divided into complete biodegradable plastics and destructive biodegradable plastic again.Completely biological fall
Solution plastics are mainly by natural polymer (as starch, cellulose, chitin) or agricultural byproducts through fermentable or synthesis tool
The macromolecule having biological degradability is obtained, and such as thermoplastic starch plastic, aliphatic polyester, polylactic acid, PE/Starch alcohol etc. are equal
Belong to this kind of plastics.Destructive biodegradable plastic currently mainly includes starch conversion (or filling) polyethylene (PE), polypropylene
(PP), polrvinyl chloride (PVC), polystyrene (PS) etc..
Polylactic acid (polylactic acid), abbreviation PLA, is more important one kind in biodegradation material.Early in
By the method for polycondensation, polylactic acid was synthesized with regard to someone in 1913, but be because that it yields poorly, molecular mass is little, so can not be by
Application.E.I.Du Pont Company in 1954 starts with the method for lactide ring-opening polymerisation to prepare polylactic acid, yet with that time also not
The degraded of polylactic acid can be controlled, therefore it is very easy to degraded in a humid environment, mechanical performance is also much (poly- not as good as PET
Terephthalate), add that the urgency for environmental conservation highlighted not enough at that time, so polylactic acid does not have at that time
Obtain enough attention.However, domestic at present can produce poly-lactic acid material on a large scale, as a kind of environmental type
Material, it inherently replaces existing printed apcksging material.
At present, in packaging field, most widely used degradation material is photodegradable plasticses and biodegradable plastic.This
Outward, also thermal degradation, oxidative degradation, water is degraded, degrading solvent, mechanical degradation, and lonizing radiation are degraded, ultrasonic degradation, chemistry fall
Solution etc..There is photoinitiation after absorbing the radiation energies such as ultraviolet under sun exposure in light degradation material, so that bond energy is weakened, long-chain
Strand splits into the fragment of lower molecular weight, and the integrity of polymer is destroyed, and physical property declines, lower molecular weight
There is Oxidation in fragment, produce free radical chain-breaking reaction, being degraded into can be by biolytic low point in atmosphere further
Son quantifies compound, is finally carbon dioxide and water by exhaustive oxidation.Whole degradation process is by light degradation and free radical chain rupture oxygen
Change the reaction that reaction combines.The most widely used in the application is biodegradation material.Polylactic acid is to use to be also earliest
Most widely used degradation material, it is mainly polymerized with plant base lactic acid, and this film clarity is good, soft, environment
Do not shrink during change, meet the intensity of packaging automatic packaging machine requirement, effect lower than existing packaging polypropylene screen hot melting temperature
Really good.
With regard to the research of degradable poly lactic acid film printing product, two parts are broadly divided on the aspect of technology at present：
On the one hand it is the research to polylactic acid film printing adaptability, is directed to traditional plastic sheeting, what it was studied is how will
As the absorbability to ink or solvent for the plastic sheeting of stock, that is, the wettability of thin film bring up to certain
Value.Method is by improving the surface free energy of thin film or improving printing equipment etc..On the other hand it is then to polylactic acid film
The research of exploitation, is directed to the properties of thin film, such as：Degradation capability after abandoning, various mechanical properties during use etc..
Method is composition or the technique changing polylactic acid film, adds the additive of different ratio.
Content of the invention
The primary and foremost purpose of the present invention is to provide a kind of surface treatment method of degradation material.
Another object of the present invention is to providing the degradation material being obtained by above-mentioned surface treatment method.
It is still another object of the present invention to provide the application of described degradation material.
The purpose of the present invention is achieved through the following technical solutions：A kind of surface treatment method of degradation material, including such as
Lower step：Degradation material is cut into 100 × 80mm, carries out sided corona treatment, corona discharge power is 0.7-1.5KVA, the corona time
For 10-40s, obtain degradation material.
Described degradation material is preferably polylactic acid (PLA) thin film.
Described sided corona treatment is carried out preferably on corona treatment.
A kind of degradation material, is obtained by above-mentioned surface treatment method.
Described degradation material can be applied as writing material.
The present invention has such advantages as with respect to prior art and effect：
(1) after sided corona treatment, significantly irregular concavo-convex fluctuating thing in PLA film surface, increases with processing power
Become intensive, roughness improves.
(2) under high voltage electric field effect, electron stream has carried out strong impact so that film surface rises to PLA thin film
Hair, becomes coarse, surface tension brings up to 60dyn/cm by 34dyn/cm, improves 76%, substantially improve film surface
Wettability and printing adaptability.
(3), after the corona bombardment film surface of high energy particle composition, cause PLA film surface molecule chain break, produce
In a large number can be with the free radical of ink molecules generation physical and chemical reaction and unsaturated center so that film surface wettability obtains
Improve.
(4) through the PLA thin film of sided corona treatment, ink significantly improves to the tack of thin film and fastness, improves thin
The printing adaptability on film surface.In addition to using as printing stock, sided corona treatment intensity is controlled to make ink attached to thin film
The property and fastness are in suitable scope, can use PLA thin film as erasable writing material.
Brief description
Fig. 1 is the microscope figure on the polylactic acid film surface of comparative example and embodiment 1, wherein：A and B is at corona
The microscope figure on polylactic acid film surface before reason, C and D is the microscope figure on polylactic acid film surface after sided corona treatment；A is contrast
Embodiment film surface amplifies the microscope figure of 35X, and B amplifies the microscope figure of 45X for comparative example's film surface, and C is real
Apply the microscope figure that example 1 film surface amplifies 35X, D is the microscope figure of the film surface amplification 45X of embodiment 1；
Fig. 2 is the microscope figure on the polylactic acid film surface of embodiment 2, and A amplifies 35X microscope figure for film surface, and B is
Film surface amplifies 45X microscope figure；
Fig. 3 is the infrared spectrogram of polylactic acid film；Wherein：A is the infrared spectrogram of comparative example's thin film, and B is real
Apply the infrared spectrogram of example 3 thin film, C is comparative example and embodiment 3 film infrared spectrum comparison diagram；
Fig. 4 is dyne value test result figure；
Fig. 5 is intravenous infusion contact angle figure before and after sided corona treatment, wherein：A is liquid-drop contact angle figure before sided corona treatment, and B is corona
Before processing liquid-drop contact angle figure；
Fig. 6 writes situation map for PLA thin film before and after sided corona treatment；Wherein：A writes situation for PLA thin film before sided corona treatment
Figure, B writes situation map for PLA thin film after sided corona treatment；
Fig. 7 is that the PLA thin film to different sided corona treatment intensity carries out erasable property test result figure；Wherein：A is gel ink pen book
Write test result figure, the rubbing test result figure that B writes for centering pen, C writes test result figure for aqueouss white board marker, and D is
The rubbing test result figure that aqueouss white board marker is write.
Fig. 8 is the diameter (2r) of height (h), drop and polylactic acid film contact surface and the static contact angle θ of drop
Relation schematic diagram.
Specific embodiment
With reference to embodiment and accompanying drawing, the present invention is described in further detail, but embodiments of the present invention do not limit
In this.
Embodiment
A kind of surface treatment method of degradation material, comprises the steps：Degradation material is cut into 100 ×
80mm, carries out sided corona treatment, and corona discharge power is 0.7-1.5KVA, and the corona time is 10-40s, obtains degradation material.
Described degradation material is polylactic acid film.Polylactic acid film used by embodiment (PLA) is that Changchun Sheng Boma is public
Department produces, specification 0.1mm.
Described sided corona treatment is carried out on corona treatment.
Described degradation material can be applied as writing material.
The experiment condition of each embodiment of table 1
Effect example 1
Key instrument tested by table 2
(1) feel ocular estimate：Not by instrument, with the naked eye the surface such as range estimation experiment sample color, transparency, texture is special
Levy, touch and record its feel with handss.
(2) stereomicroscope observation：Sample to be tested is placed on Microscope base, adjusts light source, zoom knob is screwed into
Low power number 0.7X, adjusts and rises the substantially focal plane finding under 0.7X of coming down to a lower group；The observation interpupillary distance of adjustment eyepiece, and adjust on eyepiece
Diopter is to find optimal focal plane under 0.7X；By the above process, gradually revolve the multiple of big zoom knob, suitably adjust micro-
The liter of mirror is come down to a lower group, until finding the focal plane under maximum multiple 4.5X.
(3) infrared spectrometer test：Experiment sample is cut into the small pieces of 3 × 3mm, transfers to infrared spectrometer inspection with tweezers
Survey the lower scanning of device probe, obtain the collection of illustrative plates of this sample；Using OPUS software, collection of illustrative plates is processed, integral and calculating absworption peak face
Long-pending.
(4) feel ocular estimate interpretation of result
The lower PLA thin film of naked eyes is transparent or light yellow, smooth surface, smooth, no obvious texture, and transparency is preferable, quality
Soft.
After sided corona treatment, turn white at short notice by color for PLA thin film, transparency decline, temperature raise, after gradually return to
Normality；Touched with handss and can feel that film surface becomes coarse, have trickle concave-convex sense, but flexibility is unchanged.At corona
The contrast of PLA film clarity, the no larger gap of result before and after reason.It can be seen that, sided corona treatment has no effect on PLA thin film as packaging print
Transparency required for brush material and texture.
(5) the aobvious of Figure 1A and Figure 1B before processing polylactic acid (PLA) film surface is observed in stereomicroscope observation interpretation of result
Micro mirror photo it can be seen that undressed PLA film surface is smooth and smooth, after sided corona treatment, send out by surface topography
Raw significant changes, the irregular air bubble-shaped projection that distribution is evacuated in surface, as shown in Fig. 1 C and Fig. 1 D.
After sided corona treatment under two different enlargement ratios in relatively Fig. 1 PLA thin film photo it can be seen that with 35X phase
The photo shape characteristic amplifying 45X is relatively sharp for ratio.
The microphotograph of the PLA film surface of comparison diagram 1C with Fig. 2A different sided corona treatment intensity is it can be seen that increase
After corona intensity, PLA film surface occurs in that concavo-convex fluctuating thing in a large number, is distributed more crypto set, and granule is less.This is due to PLA
In the presence of high voltage electric field, sided corona treatment discharges substantial amounts of electron stream and has carried out strong impact to PLA thin film thin film, thin
Film wildness, becomes coarse, and its Oxidation during Corona discharge Treatment and the big of PLA thin film itself are divided
Subchain cleavage product, changes the molecular components of thin film itself, causes surface mass and changes.The oil of printing in actual printing
The effective contact face area of the thin film that ink is crossed with sided corona treatment increases and printing-ink can be directly entered in the middle of micropore, is equivalent to
" casting anchor " acts on, and after in ink, solvent volatilizees completely, colorant and binder will be attached to the hole of film surface with ink film
In, form many small mechanical connection points, printing-ink is firmly attached to film surface, increased ink in thin film table
Effective set area in face.And before sided corona treatment thin film due to surface roughness low, not, deflector roll is in the transmission phase for ink adhesion
Between there is also sideslip thus affecting the printing precision of thin film because ink is not easy set, bring waste to actual production.
(6) infrared spectrum analysiss
From Fig. 3, before and after observation collection of illustrative plates can be seen that sided corona treatment, 2890cm-1And 1750cm-1The absworption peak change at place
Larger, consult picture library and understand 2890cm-1It is nearby CH absworption peak, 1750cm-1It is nearby C=O absworption peak.
Comparative example, embodiment 3 and embodiment 4 infrared spectrum in figure-CH peak and C=O peak integral area result such as table 3
Shown：
Table 3 PLA film infrared absworption peak integrates
Integral result shows, with the increase of sided corona treatment intensity ,-CH absorbs peak area and reduces, and C=O absorbs peak area
Increase.This is because during sided corona treatment, the oxygen of in the air becomes ozone in the presence of high voltage electric field, and ozone divides again
Solution becomes the oxygen atom of oxygen and nascent state.Course of reaction is as follows：
O2+ high-energy electron → 2O+ low energy electrons
2O+2O2→2O3+ hot (2-1)
I.e.：3O2+ electric energy → 2O3+ heat
In 2-1 formula, the new oxygen atom producing is a kind of strong oxidizer, and when it is collided with PLA film surface, meeting exists
There is complicated chemical reaction in nano surface rank, the carbon atom in PLA molecular structure is aoxidized so that PLA thin film table
Face high score sub-key ruptures, and molecular structure rearranges, and produces more polar fractions.The increase of C=O group makes PLA
Film surface activity improves, and surface tension improves, and the affinity of ink is increased.This demonstrates above PLA film corona
After process, surface becomes coarse conclusion.
It can be seen that, under high voltage electric field effect, polylactic acid film top layer is subject to the clashing into of electron stream of high-speed motion, due to from
Son has quality, after encountering thin film, makes film surface produce intensive random fluctuation, drawing in similar printing during motion
Hair phenomenon.Roughness of film increases, and increases effective bond area of ink, beneficial to the reinforcement of mechanical connection, thus
Make thin film more preferable with the conjugation of ink.Macroscopically demonstrating the change to PLA film characterization performance for the sided corona treatment.
Substantial amounts of plasma particle ozone is produced, their direct or indirect and thin film surface molecules and air during sided corona treatment
In water occur chemical reaction, so that the molecular structure of thin film is changed, increased the content of C=O isopolarity group so that
PLA film surface activates.
Effect example 2
Table 4 experiment main material and reagent
Table 5 experiment key instrument and equipment
(1) sided corona treatment：Corona discharge power is respectively set to 0,0.4,0.7,1.0,1.3,1.6KVA carries out to PLA thin film
Persistent period is 5,10, the sided corona treatment of 15S, and make the wide sample of 150mm length, 80mm.
(2) contact angle test：According to《GB/T 30447-2013 nano thin-film contact angle measuring method》, by polylactic acid
(PLA) thin film is placed in horizontal table top, with liquid-transfering gun, 5 μ L deionized waters is vertically dropped in material upper surface from top to bottom, uses
Photographing unit cooperation wide-angle lens shoots drop photo.Image measures height (h) and drop and the poly- breast of drop by mapping software
The diameter (2r) in sour film contacts face is as shown in figure 8, obtain θ1, due to θ1It is the half of θ, can be in the hope of according to below equation (3.1)
Go out static contact angle θ.
tanθ1=h/r
θ=2xtan-1(h/r) (3-1)
(3) surface tension test：By dyne pen perpendicular to thin film planar, add suitable pressure, draw on the membrane surface
Article one, line, if liquid film can keep more than 2 seconds, film surface tension force is more than or equal to the value of selected dyne pen, uses numerical value
Bigger dyne pen repeats previous action, and by that analogy, the liquid film until drawing in 2 seconds contract or fragments into the globule,
Then the previous value of current test can be considered the surface tension of thin film.It is shrunk to the globule if first time tests, then change
The less dyne pen of numerical value carries out second test, till liquid film is constant.Test effect is as shown in Figure 4.
(4) surface tension attenuation test：PLA film sample is placed (about 26 DEG C) preservations at room temperature, respectively the
5th, test its surface tension value and keep a record within 10,20,25 days.
(5) the erasable measure of merit of PLA thin film：Use neutral signature pen and aqueouss white board marker respectively before and after sided corona treatment
Write on PLA thin film, observe the adhesion effect of ink and film surface；Wipe the person's handwriting on PLA thin film with rubber, observe ink
Falling-off effect, Taking Pictures recording.
(6) contact angle analysis
The PLA film surface drop after sided corona treatment is can be seen that intravenous infusion contact angle photo before and after Fig. 5 sided corona treatment
Contact angle substantially diminish, material is changed into ultra-hydrophilic type from medium hydrophilic.Record all sample contact angles as shown in table 6：
The liquid-drop contact angle of table 6 different disposal intensity PLA film surface
Result shows, PLA thin film presents in the contact angle of plastic material surface with the increase of sided corona treatment intensity, liquid
Downward trend, but the state that tends towards stability after increasing to certain value, this shows within certain processing power scope,
After Corona Surface Treatment, its surface activity increases PLA thin film, and polarity improves, and is conducive to liquid to spread out on its surface, but
Exceed certain limit when processing intensity, sided corona treatment produces certain destruction to film surface structure, under its treatment effect
Fall, this also illustrates that the reduction of contact angle is not unconfined on a declining curve always with the increase processing intensity, but
Reach poised state eventually.
(7) surface tension analysis
Record all sample surface tension force records as shown in table 7：
As shown in table 7, after surface corona process, the surface tension of thin film substantially increases PLA thin film, and with process
Power, the growth of process time and increase.This is because the particle power potential energy producing during corona discharge increases, to frosting
Opening of long-chain chemical bond is favourable, and film surface activity can accordingly increase, and contributes to attachment and the bonding of ink.
The surface tension test result of table 7 different disposal intensity PLA thin film
Analysis surface tension variations curve, surface tension changes greatly between 0.4KVA and 0.7KVA, slowly carries afterwards
Rise, finally stablize in 60dyn/cm, this is because film surface processing power is within the specific limits, increase with processing power,
, there is redox reaction therewith, and produce ozone in the oxygen molecule of upper state electron collision in the air, nitrogen molecular, hydrone etc.
With nitrogen oxides etc..Because ozone has strong oxidisability, in film surface nanoscale, complicated organic reaction can occur, produce
Raw hydroxyl (- OH), carboxyl (- COOH), carbonyl (C=O) etc..The introducing of these oxygen-containing polar functional groups, is film surface tension force
Increased major reason.When sided corona treatment is after exceeding this boundary, even if unilaterally increasing power again, thin film also will not be made
Surface energy grade obtains larger raising, this is because when thin film is during instantaneously carrying out sided corona treatment, electrode and Corona roller
Between air capacity be in metastable state, and content that this oxygen molecule relatively in stable air amount contains is also fixing
, even if improving the voltage and current value of electrode, nor activating more oxygen molecules, so that more oxygen-containing functional groups is rested on
Film surface, therefore surface tension finally tend towards stability.
(8) surface tension attenuation analysis
The surface tension variations record of experiment PLA film sample is as shown in table 8.
By the experimental data of table 8 it is known that during sided corona treatment, to a certain extent, corona intensity is bigger, just
Higher electric field can be produced at electrode, film surface just has more, shorter free radical and produces, and makes film surface polylactic acid
The degree that monomer structure is destroyed is bigger, and this is unfavorable to the crystallization further of polylactic acid molecule；Because polylactic acid surface is divided
The speed of son crystallization is slow, result in the slow of reduction in surface tension, that is, sided corona treatment intensity corresponding polylactic acid film table greatly
Face tension decay is slow.It is understood that stress recovery occurs mainly in several days that thin film has just been produced, polymer is when this section
Between in be changing into crystal-type by unformed, thus affecting the effect of sided corona treatment, the result of experiment also proves this point well.
The decay of table 8 corona and the relational result of corona intensity
Generally speaking, the little PLA thin film of corona intensity, it is big that its surface tension rate of decay is faster than corona intensity, but warp
After spending the sufficiently long time, both numerical value are identical, and referred to as sided corona treatment is ageing.Therefore, in actual production, through corona
The plastic sheeting processing should upper as early as possible print, and should not place for a long time, it is to avoid causes film printing adaptability to be deteriorated.
(9) the erasable effect analyses of PLA thin film
As shown in fig. 6, before sided corona treatment, PLA film surface wettability is poor, is write on surface using neutral signature pen and do not flow
Freely, aproll phenomenon occurs, ink easily comes off.And the thin film through sided corona treatment then makes moderate progress, can meet and write requirement.
Find through experiment, sided corona treatment intensity is bigger, signature pen inks are better with the tack of thin film, are more difficult to come off.
The test of erasable property is carried out to the PLA thin film of different sided corona treatment intensity, result shows, is 1.6KVA through intensity,
The erasable effect of PLA thin film of 15S sided corona treatment preferably, is surveyed to this sample with neutral signature pen and aqueouss white board marker respectively
Examination, effect is as shown in Figure 7：
This experimental result confirms that PLA thin film is not used as novel book and writes material replacement traditional paper and non-degradable plastics
Blank has very high feasibility.
PLA film article is on a declining curve with the increase of sided corona treatment intensity with the contact angle of water, but its polarity only exists
Improve in certain limit, be finally reached steady statue.Corona excessively damages to film surface it is impossible to continue to increase its surface
Activity.
The surface tension of PLA thin film is directly proportional within the specific limits to sided corona treatment intensity, this is because electronics and air
In various molecules occur redox reaction to produce the ozone with strong oxidizing property, there is having of complexity with film surface in ozone
Chemical machine reaction introduces oxygen-containing polar functional group, and the air between electrode and Corona roller is limited, when oxygen molecule consumption
When totally, surface tension no longer increases.
The PLA thin film that sided corona treatment is crossed has ageing, and its surface tension passage in time can be reduced to a fixation
Value, and the little thin film of sided corona treatment intensity declines faster.Therefore, the thin film of sided corona treatment should use as early as possible.
By the intensity adjusting sided corona treatment, ink is controlled in the tack of PLA film surface and fastness, can
With the effect easily wiped, easily write, the practicality of surface-treated polylactic acid film is expanded.
By stereomicroscope, Fourier infrared spectrograph (FT-IR), the directly method such as observation analysis sided corona treatment pair
PLA film surface physical features and the impact of molecular structure, by intravenous infusion contact angle, surface tension test pen, ink adhesion
Evaluate the treatment effect of the experiment sample under different disposal process conditions with detections such as fastness tests, optimize PLA film corona
Handling process and parameter.
After sided corona treatment, significantly irregular concavo-convex fluctuating thing in PLA film surface, and increasing with processing power becomes
Intensive, roughness improves.
Under high voltage electric field effect, electron stream has carried out strong impact so that film surface fluffing to PP thin film, becomes
Obtain coarse, surface tension brings up to 60dyn/cm by 34dyn/cm, improves 76%, substantially improves the wettability of film surface
And printing adaptability.
After the corona bombardment film surface of high energy particle composition, cause PLA film surface molecule chain break, produce a large amount of
Can be with the free radical of ink molecules generation physical and chemical reaction and unsaturated center so that film surface wettability be changed
Kind.
Through the PLA thin film of sided corona treatment, ink significantly improves to the tack of thin film and fastness, improves thin film table
The printing adaptability in face.In addition to using as printing stock, sided corona treatment intensity is controlled to make the tack to thin film for the ink
It is in suitable scope with fastness, PLA thin film can be used as erasable writing material.
Above-described embodiment is the present invention preferably embodiment, but embodiments of the present invention are not subject to above-described embodiment
Limit, other any spirit without departing from the present invention and the change made under principle, modification, replacement, combine, simplify,
All should be equivalent substitute mode, be included within protection scope of the present invention.
Claims (5)
1. a kind of surface treatment method of degradation material is it is characterised in that comprise the steps：Degradation material is cut into
100 × 80mm, carries out sided corona treatment, and corona discharge power is 0.7-1.5KVA, and the corona time is 10-40s, obtains degradation material.
2. the surface treatment method of degradation material according to claim 1 is it is characterised in that described degradation material
For polylactic acid film.
3. the surface treatment method of degradation material according to claim 1 is it is characterised in that described sided corona treatment exists
Carry out on corona treatment.
4. a kind of degradation material, the surface treatment method of the degradation material described in any one of claim 1-3 obtains.
5. the degradation material described in claim 4 is applied as writing material.
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Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103203880A (en) * | 2013-04-28 | 2013-07-17 | 厦门建霖工业有限公司 | Preparation method of biopolymer material card film |
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2016
- 2016-07-17 CN CN201610569221.XA patent/CN106393744A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103203880A (en) * | 2013-04-28 | 2013-07-17 | 厦门建霖工业有限公司 | Preparation method of biopolymer material card film |
Non-Patent Citations (1)
| Title |
|---|
| 伍秋涛: "《实用软包装复合加工技术》", 31 March 2008, 化学工业出版社 * |
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