CN104710861A - Special-effect PP plastic cement processless printing ink - Google Patents

Abstract

The invention discloses a special-effect PP plastic cement processless printing ink. According to the special-effect PP plastic cement processless printing ink, domestic PUL-1 and PL-0826 are taken as bonding and film-forming agents of screen printing ink, and are used for influencing and determining a plurality of physical properties and image-text ink film quality such as glossiness, adhesiveness, dryness, and water washing resistance; a pigment possesses light resistance and contains no chromium, cadmium, or readily oxidizable substances is adopted; editable and nontoxic CH2CH2OH and DMF are taken as solvents, and are used for adjusting printing and film forming drying speed, and improving processing adaptability in following printing decoration; CH3CH2OHCH2OH and the like are taken as film-forming auxiliary agents so as to improve quality of printing image-text ink films such as levelling property and glossiness.

Description

Treatment of printing ink exempted from by special efficacy PP plastic cement

Special efficacy PP plastic cement of the present invention is exempted from treatment of printing ink and is belonged to chemical field.

 

(1) field

Along with the raising of China's expanding economy and living standards of the people, the health perception of people and environmental consciousness have become the stricter quality standard that pharmaceutical products and packaging thereof update.

For this reason, National Drug Administration has promulgated " national drug packaging vessel (material) standard " YBB00132002 a few days ago, starts to try from 1 day June in 2004.

This standard specifies: solvent residual amount must not more than 10.0mg/m2, wherein benzene solvent residual quantity must not more than 3.0mg/m2, metal must not more than 1,000,000/.

Readily oxidizable substance Sulfothiorine 0.0lmol/L, when being titrated to terminal, adds starch indicating liquid 0.25ml, continues to be titrated to colourless, and another water intaking blank solution operates with method, and the two consumes titrating solution must not more than 1.5ml.Think after studying according to above-mentioned standard, only in strict accordance with the requirement of this standard, just can reach the requirement of green ink, just can integrate with the world market.

Although introduce in composite membrane for packaging medicine, bag general rule the Pharmacopoeia of the People's Republic of China 2000 editions the content such as annex VIII and VIII P, KGBl038-2000, two annex XIC, XIJ of supplementing.

But this is applicable to packaging printing-ink, tackiness agent and the stock of the pharmaceutical packaging composite membrane of non-injection agent, bag (three edge sealing bags, middle envelope, bellows pocket, autonomous bag, zippered bag etc.), strict technical indicator is not only had higher requirement to the formulating of recipe of ink and oil polish product and raw material sources.

And all need to re-recognize in production technique (comprising plant floor, installations and facilities) etc., could issuable pollution from source prevent packages printing to produce.

Special efficacy PP plastic cement exempts from treatment of printing ink in chemical industry widespread use, is a Multipurpose thermal sealing, can be applicable to the heat-sealing of aluminium foil and PP, PVC, PS, PET and PE, and the heat-sealing between aluminium foil and PVC, there is excellent heat seal strength.It is containing benezene solvent not, and wholesomeness is good, and heat seal strength is high, and the transparency is excellent, meets chemical industry now to the requirement sealing ink on ground color without characteristics such as impacts.

(2) brief introduction

The printability of ink, derives from immanent structure and intrinsic physical properties thereof and chemical property.

But in application process, the checking having to pass through the whole strokes on printing press, the comprehensive drying process on stock and printing quality just can be given certainly.

Certainly, the printability of ink is not isolated, is embody under the mutual coordination of printing press, printing material and other conditions.The adaptive of ink in printing press stroke, does not add discussion herein, focuses on set (the ink initial stage the is dry) aspect of inking moment on aluminium-foil paper, because it relates to printing set-off and dryness function two key issues.Put it briefly, infiltration is the basis of ink set on the substrate; Set speed is the condition of layer of ink drying in mid-term; The time of drying in mid-term is the key of layer of ink conjunctiva quality.1. infiltration is the basis of set.Low-melting ink vehicle in resin type medium and high classes flexographic ink, mainly with resin, dry vegetable oil, ink oil composition.

Wherein, resin is dissolved in and belongs to high viscosity phase in dry vegetable oil; Ink oil is low viscosity phase, with the combination equal to high viscosity of miscible (not being very molten) states of matter.

Effect due to ink oil is only dilution, reduces the viscosity of front phase, make ink adapt to apply on the printer, therefore, after ink completes its " mission ", (print to the moment on stock at ink), just must leave ink system immediately, leave The faster the better.

Prerequisite-the infiltration of ink set that Here it is.2. set speed is the condition of layer of ink drying in mid-term.Set speed, the ink oil moment infiltration capacity on the substrate be mainly miscible in ink system determines.

Moment, infiltration capacity was larger, and high and low two phase viscosities in ink are separated faster, and the high viscosity concentration of component of resin, dry vegetable oil can sharply increase exactly, and the physical change of moment makes layer of ink form gelatinized set on the substrate.

Can high and low two-phase thoroughly be separated, and not only decides the set speed of layer of ink, and the time of relation inking layer drying in mid-term.3. the time of drying in mid-term is the key of layer of ink conjunctiva quality.

So-called time of drying in mid-term, refer to the intermediate stage of layer of ink from set trend conjunctiva, its time, its phenomenon was similar to conjunctiva states of matter about 3 hours, had dabbed lubricious sense, but can not firmly rub.

The mid-term of degree like this is dry, and known " solvent " thoroughly escapes and go from system, and dry vegetable oil there occurs oxygen uptake polymerization gradually to gelling solid state transformation, finally reaches finish-drying conjunctiva.

4. obviously, permeate, just must have the stock possessing absorptive character, but the aluminium foil on aluminium-foil paper top layer does not have this kind of condition.No matter do not possess absorbefacient aluminium foil, be use flexographic ink, or " special " ink, is still detained liquid solvent after aluminium foil inking.

Such layer of ink, is not only the principal element of printing set-off, and is the root producing dryness.

Therefore, printing set-off and the bad difficulty of dryness be overcome, just must change the penetration mode of ink, improve inherent condition.

In sum, this product possesses skills advanced, easy to use, the advantage such as economic health, nontoxic pollution-free, has replicability.

At present, in packages printing, the focus that treatment of printing ink has become people's concern exempted from by special efficacy PP plastic cement.

Special efficacy PP plastic cement is exempted from treatment of printing ink and be it is characterized in that regulating ink with pure water dilution, particularly when printed matter is when being subject to certain high temperature, the ink film of its printing-ink then can improve its attachment fastness, thus substandard products will be caused even to scrap because the heat of environment causes softening, the adhesion of ink film.

Product according to the needs of user and actual typography requirement, can carry out different silk-screen printing techniques.

Treatment of printing ink exempted from by special efficacy PP plastic cement: be medicinal aluminum foil packaging heat-seal adhesive, is applicable to aluminium foil and PS(polystyrene) between heat-sealing, there is excellent heat seal strength.

Drying conditions: 165 DEG C, 9 seconds.

Heat-sealing temperature: 165 ~ 210 DEG C

To confirm when 1, using that whether glue spread, heat-sealing temperature, heat-sealing time is enough.

2, heat seal strength changes according to material and heat seal condition.

Specifics aluminium foil packing coating silk-screen heat-sealing ink is a Multipurpose thermal sealing, can be applicable to the heat-sealing of aluminium foil and PP, PVC, PS, PET and PE.

Feature: 1, not containing benezene solvent, wholesomeness is good,

2, heat seal strength is high,

3, the transparency is excellent, on ground color without impact

Precaution: glue spread is not enough, coating bake out temperature is too low or too high and heat-sealing temperature is too low all can affect heat seal strength, must carry out abundant experiment before using.

(3) definition and purposes

Drug packaging is a kind of very special commodity packaging be under the jurisdiction of in packaging field.

First, it wants the wrapped various premium properties of tool; Secondly, the function keeping pharmaceutical effectiveness must also be possessed.

With aluminium foil as pharmaceutical packing, there is the advantage such as attractive in appearance, light weight, choke, resistance light, thus make it become star in drug packing material.

Along with the raising that people realize health care aspect, aluminium foil has been deep in our everyone life, is responsible for great packaging mission in order to the health of the mankind.

To packaging, the quality of quality is largely embodied on the heat seal strength of product.

For this reason, we are necessary to analyze the factor affecting aluminium foil drug packaging heat seal strength, and this is very important to the quality improving product.

The bonding coat (also known as VC layer) of drug packaging has good Thermoadhesive, can seal that (size of its bonding force is the intensity of heat-sealing in a heated condition with PVC film, to more than 5.88N/15mm be reached by GBl2255---90 regulation), the medicine in the PVC film bubble-cap processed can be sealed completely.

This bounding force not by temperature, humidity effect, can keep drug effect well in long-term preservation process, and easy to carry.

The factor affecting aluminium foil drug packaging heat seal strength mainly contains the following aspects:

1. raw and auxiliary material aspect

Its heat seal strength of quality to product has a significant impact.Particularly surface and oil contaminant, the bonding force between meeting weakable adhesive and primary aluminum paper tinsel.

If surface have greasy dirt and surface tension lower than 31 × 10-3 μm time, be just difficult to reach desirable heat seal strength, thus must strictly gate of the quality monitoring.In addition, find in process of production, the primary aluminum paper tinsel of each side technical indicator some lot number all satisfactory, the coating adhesive when all processing condition there all are not change, but the heat seal strength of the finished product does not all reach requirement, reason be with the metal ingredient of primary aluminum paper tinsel and surface luminous intensity relevant not.

Result of study shows, converts certain special link, and primary aluminum paper tinsel is fully used, and product just reaches desirable heat seal strength.

2. tackiness agent aspect

Tackiness agent is the particular matter containing solvent, and it is under certain processing condition, is coated on dark face (or light face), dries and forms bonding coat, play conclusive effect to the heat seal strength of product through drying tunnel.

Tackiness agent can be divided into water white transparency, gold and color series in color, can select according to the demand of user.

The tackiness agent of heterogeneity, the heat seal strength of its finished product is also different.

Domestic manufacturer's majority adopts imported materials to prepare tackiness agent, and product can reach very high heat seal strength.

Imported materials price is too expensive, and in order to obtain the high profit of product, the producer of some scientific research strength richness just sets about researching and developing domestic similar starting material.

This research direction is very tempting, if can be successful, will bring enormous benefits to enterprise.

It is reported, because the technique of domestic production raw material producer is limited, domestic raw material cannot substitute imported raw material to a great extent.

If improper use, the heat seal strength of product can be had a strong impact on.3. production technique aspect

Under certain process parameter control, make tackiness agent in primary aluminum paper tinsel surface coated film forming, the quality of film forming directly can affect the heat seal strength of product.

Wherein important parameter comprises position, the angle of the speed of coating, the wise temperature of drying tunnel, the A Wen shape of coating roll, the depth, line number and scraper.

The speed of coating determines the coating time dry in drying tunnel.

If surface covered is too fast, drying tunnel temperature is too high, and film coated surface solvent evaporates can be made too fast, cause the remnants of film internal solvent, dried coating film is just abundant not, is difficult to be formed dry solid and firmly bonding coat, the heat-sealing that must affect product is like this strong, degree, and product is sticked together between layers.

The position of the reticulate pattern shape of coating roll, the depth, line number and scraper, angle determine thickness and the uniformity coefficient of coated film.

If select or adjust improper, tackiness agent just can not be coated on former aluminium foil surface equably and cause film forming uneven, and the heat-sealing effect of product would not be got well, and intensity also can be affected.And according to the regulation of national standard bonding coat coating, difference should be less than ± 12.5%.

Therefore, the process of bonding coat coating film forming must strictly be completed according to the parameter of process stipulation, to ensure the evenly solid of film forming.

4. heat-sealing temperature

Heat-sealing temperature is the important factor affecting heat seal strength.

Temperature is too low, and bonding coat can not be made to seal with PVC film well, bonding just insecure between bonding coat with PVC film.

If temperature is too high, medicine can be made again influenced.Therefore, more rational heat-sealing temperature is generally between 150 DEG C ~ 160 DEG C.

5. seal pressure

Reach desirable heat seal strength, certain heat-sealing pressure will be set.

If insufficient pressure, the bonding coat of product and PVC film not only can not be made fully to fit and to seal, bubble even can be made to stay between the two, not reach good heat-sealing effect.

So the pressure of national Specification heat-sealing is 0.2 × 10Pa.

6. seal the time

The heat-sealing time also can affect the heat seal strength of product.

Under normal circumstances, under identical heat-sealing temperature and pressure, it is more firmly perfect that any heat-sealing time long can make heat-seal land involution obtain, and can reach the heat seal strength of expection better.

But the processing condition of modernization high speed medicament packing machine can not provide long time, seal, if the heat-sealing time is too short, then will seal insufficient between bonding coat and PVC film.For this reason, the heat-sealing time of national Specification science is 1s.

As a whole, affect drug packaging, the factor of heat seal strength is many-sided, and each aspect can have influence on the heat seal strength of product independently.

Wherein most important factor is tackiness agent aspect, and certain otherwise impact also can not be ignored.

This will ask manufacturing enterprise will be good at actively going for problem, monitor the links of production, only in this way just can guarantee the launch products of high-quality, and have the advantage in keen competition with high standard, high request and high-tech.

Trust by user, make enterprise be full of vitality.

The technical process of Aluminium Foils Packaging for Medicine printing and feature:

Its concise and to the point technical process is: aluminium foil unreels → intaglio printing → drying → stopping off → drying → painting bonding coat → drying → aluminium foil rolling.

In whole production process; to the heat seal strength that surface quality and the bonding coat of gravure printing character pattern will reach; the tackiness of protective layer and speed, the tension control run in dry stability and coating machinery need strict assurance in technological operation.

Thus protection medical aluminum foil PTP has good barrier, wholesomeness, heat sealability and good physical and mechanical properties.

The properties of above-mentioned requirements to be reached in PTP aluminium foil coating production process, familiar applied material property of still needing, and following problem should be noted in operation:

1. grasp the characteristic of printing-ink

The raw material producing PTP aluminium foil used is industrial pure paper tinsel, and general requirement thickness is 0.02mm, and tensile strength is 98kPa, rupture strength is 90kPa, clean surface, smooth, without wrinkle, without Indentation Damage, without fluorescent substance in blocks, moistened surface tension force is not less than 32.The no more than 1/m2 of pin hole of diameter 0.1-0.3mm to the requirement of medicinal aluminum foil pinhole rate.

Due to the defect that pin hole in aluminium foil is penetrance, medicine is subject to oxygen, water vapour and light intrusion can be made drug effect reduce or go bad, so very strict to the requirement of pinhole rate; If when aluminum foil thickness exceeds required deviation (10%) in addition, impact can be had on the glue spread of bonding coat and protective layer, need cause the attention of operator.

The printing-ink of aluminium foil is mainly divided into two classes at present: a class is polyamide-based ink.The printing of this ink to all kinds of material has good adhesion, dispersiveness, glossiness, wear resistance, solvent release good, soft, is used to the printing of plastics film more.

When the printing for aluminum foil material, the premium properties of this kind of ink all can show, and its thermotolerance also can meet the requirement of aluminium foil.

Another kind of is the aluminium foil ink special that is main component with vinylchlorid vinyl acetate between to for plastic copolymerization resin/acrylic resin, it is held is a little bright in colour, concentration is high, strong especially with the adhesion of aluminium foil, have the good transparency, but due to during for intaglio printing, its solvent evaporates degree is large, ink in ink hole is dry and hard, deposition easily to cause gravure roll when printing for medical aluminum foil PTP table, produces scumming phenomenon.

Therefore needing congeals to the deposition of ink carries out necessary pre-treatment, and its method stirs depositing the ink congealed or increase temperature (water-bath).

If the storage time of ink is long, ink there will be deposition, and cause ink upper strata resin solution many, lower layer pigment is many, and upper strata is light, and lower floor's color is dark, uses after also should stirring.

Special efficacy PP plastic cement is exempted from treatment of printing ink and should be possessed and have good adhesivity to aluminium foil, the character pattern of printing is firmly solid, simultaneously solvent release can be wanted soon, good heat resistance, wear resistance and luster performance be good, and it is nontoxic, can not pollute packaging medicine, functional viscosity should meet the requirement of aluminium foil hourly velocity and drying.

The treatment of printing ink scope of application exempted from by special efficacy PP plastic cement:

1, P.T.P text printout (hard aluminium foil) is applicable to

2, lactic drink bottle cap material printing (the soft aluminium foil of precoating) is applicable to

3, be applicable to the heat-sealing between aluminium foil and PVC, there is excellent heat seal strength.

Feature: 1, printability is excellent, without stifled version, mist version phenomenon

2, stability in storage is good, and the shelf lives is 1 year, there will not be gel phenomenon in storage process

3, good thermotolerance, at 160 DEG C, heat-sealing is without fading phenomenon

4, good water-fast and resistance to lactic acid performance

5, bright in luster, the transparency is good

Feature: 1, single-component use time be just applicable to light, boil boil, high temperature steaming purposes

2, scraper adaptive, dot reproduction are good; Be applicable to long-time printing

3, versatility is wide, can reduce ink type, reduces printing loss, improves printing efficiency

4, on OPP film, good sticking power is had

5, high density, high-clarity

6, printed matter residual solvent amount is very low, is particularly suitable for snack food product packaging and is suitable for film polyester (PET), the above nylon of process degree 48 dyne (NYL), the above Biaxially oriented polypropylene film (BOPP) of process degree 52 dyne (BOPP), process degree 38 dyne above K coating film, printing level glassine paper (PT), printing level special Bao Mo – EVAL.

Inapplicable film: moistureproof glassine paper (MST), upgrading OPP prints moistureproof glassine paper (MST), can produce the sticky back of the body, shift the problems such as bad, residual solvent is too much.It is bad that printing upgrading OPP can produce ink transfer.

(4) formula and composition

Special efficacy PP plastic cement exempt from will to note in the exploitation for the treatment of of printing ink following some:

(1) starting material that strict employing is clean;

(2) clean installations and facilities are used;

(3) clean packaging vessel is adopted;

(4) select and to regenerate or can recycled material;

(5) easy technique and strict material loss index is adopted to control, the quantity discharged of decreasing pollution thing;

(6) refuse produced is innoxious, resource utilization, minimize;

(7) all technical parameter that the pollution that ink produces must not specify more than YBB0013002 standard;

(8) packages printing ink cleans and comprises: do not decompose when 180-250 DEG C and produce pollution.In order to designing, produce, print, cut, the process procedure such as heat-sealing reaches environment protection control,

Special efficacy PP plastic cement is exempted from treatment of printing ink and is mainly divided into two classes at present:

One class is polyamide-based ink.

The printing of this ink to all kinds of material has good adhesion, dispersiveness, glossiness, wear resistance and solvent release is good, soft, is used to the printing of plastics film more.

When the printing for aluminum foil material, the premium properties of this kind of ink all can show, and its thermotolerance also can meet the requirement of aluminium foil.

Another kind of is the aluminium foil ink special that is main component with vinylchlorid vinyl acetate between to for plastic copolymerization resin/acrylic resin, and be characterized in bright in colour, concentration is high.

Strong especially with the adhesion of aluminium foil, have the good transparency, but due to during for intaglio printing, its solvent evaporates degree is large, for easily causing gravure roll when protective foods, medical aluminum foil PTP table print, ink in ink hole is dry and hard, deposition, produces scumming phenomenon.

The composition for the treatment of of printing ink exempted from by special efficacy PP plastic cement:

1. resin adopts domestic PUL-1, PL-0826 etc., be ink for screen printing connect to membrane substance.The various physicals of impact and domination profound level and the quality of picture and text ink film--as gloss, tack, drying property, water resistant detergency etc.

2. pigment adopts light permanency, does not contain chromium, cadmium and readily oxidizable substance as tinting material.

3. solvent employing eats and nontoxic CH2CH2OH, DMF, to regulate the fitness of process in the rear printed decoration of printing and film forming rate of drying and improvement.

4. film coalescence aid adopts CH3CH2OHCH2OH class to improve the quality of printing figure message ink film--levelling property and glossiness.

Composition: water 10%

Tensio-active agent 25%

Whipping agent 2%

Macadamia nut oil 1%-1.5%

Urea 1%-1.5%

Iodopropynyl formic acid fourth 2%-2.2%

Isothiazolinone and Sodium Benzoate 3%

Stopping composition 10-13%%

Organic solvent (volatile components) 35%-40%.

Claims (5)

1. the raw material that special efficacy PP plastic cement exempts from treatment of printing ink product PTP aluminium foil used is industrial pure paper tinsel, general requirement thickness is 0.02mm, tensile strength is 98kPa, rupture strength is 90kPa, clean surface, smooth, without wrinkle, without Indentation Damage, without fluorescent substance in blocks, moistened surface tension force is not less than 32; The no more than 1/m2 of pin hole of diameter 0.1-0.3mm to the requirement of medicinal aluminum foil pinhole rate.

2., due to the defect that pin hole in aluminium foil is penetrance, medicine is subject to oxygen, water vapour and light intrusion can be made drug effect reduce or go bad, so very strict to the requirement of pinhole rate; If when aluminum foil thickness exceeds required deviation (10%) in addition, can to the glue spread of bonding coat and protective layer;

Printed matter residual solvent amount is very low, is particularly suitable for snack food product packaging and is suitable for film polyester (PET), the above nylon of process degree 48 dyne (NYL), the above Biaxially oriented polypropylene film (BOPP) of process degree 52 dyne (BOPP), process degree 38 dyne above K coating film, printing level glassine paper (PT), printing level special Bao Mo – EVAL.

3. special efficacy PP plastic cement exempt from will to note in the exploitation for the treatment of of printing ink following some:

The starting material that strict employing is clean;

Use clean installations and facilities;

Adopt clean packaging vessel;

Select and can regenerate or energy recycled material;

Easy technique and strict material loss index is adopted to control, the quantity discharged of decreasing pollution thing;

Innoxious, the resource utilization of refuse produced, to minimize;

The all technical that the pollution that ink produces must not specify more than YBB0013002 standard

Packages printing ink cleans and comprises: do not decompose when 180-250 DEG C and produce pollution; In order to designing, produce, print, cut, the process procedure such as heat-sealing reaches environment protection control,

Special efficacy PP plastic cement is exempted from treatment of printing ink and is mainly divided into two classes at present:

One class is polyamide-based ink;

The printing of this ink to all kinds of material has good adhesion, dispersiveness, glossiness, wear resistance and solvent release is good, soft, is used to the printing of plastics film more;

When the printing for aluminum foil material, the premium properties of this kind of ink all can show, and its thermotolerance also can meet the requirement of aluminium foil.

4. special efficacy PP plastic cement is exempted from treatment of printing ink another kind of is the aluminium foil ink special that is main component with vinylchlorid vinyl acetate between to for plastic copolymerization resin/acrylic resin, and be characterized in bright in colour, concentration is high;

Strong especially with the adhesion of aluminium foil, have the good transparency, but due to during for intaglio printing, its solvent evaporates degree is large, for easily causing gravure roll when protective foods, medical aluminum foil PTP table print, ink in ink hole is dry and hard, deposition, produces scumming phenomenon;

The composition for the treatment of of printing ink exempted from by special efficacy PP plastic cement:

Resin adopts domestic PUL-1, PL-0826 etc., be ink for screen printing connect to membrane substance; The various physicals of impact and domination profound level and the quality of picture and text ink film--as gloss, tack, drying property, water resistant detergency etc.;

Pigment adopts light permanency, does not contain chromium, cadmium and readily oxidizable substance as tinting material;

Solvent employing eats and nontoxic CH2CH2OH, DMF, to regulate the fitness of process in the rear printed decoration of printing and film forming rate of drying and improvement;

Film coalescence aid adopts CH3CH2OHCH2OH class to improve the quality of printing figure message ink film--levelling property and glossiness.

5. water 10%

Tensio-active agent 25%

Whipping agent 2%

Macadamia nut oil 1%-1.5%

Urea 1%-1.5%

Iodopropynyl formic acid fourth 2%-2.2%

Isothiazolinone and Sodium Benzoate 3%

Stopping composition 10-13%%

Organic solvent (volatile components) 35%-40%.