Sino IML has been developed in Europe, the United States and other counties for more than 20 years, and has been applied in industries such as oil, daily necessities, food and medicine.
What is Sino IML? It refers to PP or PE synthetic paper in the surface treatment, coated with a special hot melt adhesive processing into the back of the special label paper, printed into a trademark. The machine hand is used to suck up the printed label and place it in the mold. The vacuum hole on the mold firmly adsorbs the label in the mold. When the plastic bottle’s raw material is heated and drooped into a flexible tube, the mold with the label is quickly closed, and the air is blown into the tube to make it close to the mold wall, then the temperature in the whole mold is still relatively high, the label solid adhesive next to the prototype bottle body begins to melt and bond to the plastic bottle body in the mold. When the mold is opened again, the plastic bottle body is formed, and the label and the bottle body are fused into one. Make the beautifully printed logo firmly embedded in the plastic products, labels and plastic bottles on the same surface, feel no label, color graphics as directly printed on the surface of the bottle.
This article will introduce in-mold labeling technology involved in the main technology.
Ⅰ. Cov khoom siv
Sino IML label technology content is very high, the first is reflected in the material. The first to enter the Chinese market is Japan’s Yupo in-mold label, known as the world’s most successful in-mold label materials. Now, Polyart (Pria) blow molding internal standards are also entering the Chinese market, and some local companies are also stepping up research and development of this material.
Sino IML should first have good printability, to ensure ink is firmly attached to the surface, in the post-processing process to ensure good processing adaptabilities, such as die-cutting and cold stamping processing adaptability. Tom ntej, this kind of material must satisfy the user characteristic, when blow molding and the plastic bottle unifies.
Sino IML materials are divided into paper and plastic film. The former deforms when exposed to water or moisture and reduces its use-value. Txawm li cas los, Qhov zoo ntawm yav dhau los yog tias tsis muaj kev cuam tshuam electrostatic thiab daim ntawv lo tuaj yeem nqus tau thaum lub raj mis tshuab raj mis. Ntxiv rau, Cov qub tsis yog tib yam khoom siv raws li lub raj mis yas thiab tsis yooj yim rau rov ua dua tshiab. Now, Ob qho tib si hauv tsev thiab txawv teb chaws kev lag luam feem ntau siv yas zaj duab xis rau cov khoom siv hauv pwm daim ntawv lo.
Tus qauv ntawm Sino IML cov khoom siv yog tsim los ntawm lub tshuab luam ntawv nto, ib txheej nruab nrab, thiab txheej nplaum. Lub luag haujlwm ntawm cov ntawv luam ntawv yog lees txais number case, los tsim cov duab xim thiab cov ntawv nyeem; Txheej nruab nrab txhawb nqa cov ntawv luam ntawv nto, muab cov khoom siv nrog txaus nruj thiab pob tshab, Thaum lub sijhawm molding nyob rau hauv lub siab thiab kub kub, nws ua kom muaj tseeb overprinting. Cov kua nplaum txheej yaj hauv qhov kub siab, making the label material and the plastic container become an integral whole, ensuring that the label and the plastic bottle firmly stick together.
Printed surface materials generally have three: PE, Bopp and PE + PP. Since most plastic containers are currently made of PE material, the use of PE in-mold labels is more conducive to recycling, as they are homogeneous materials. In the production of in-mold labels, in order to improve the ink-affinity printing surface materials, generally need to coat surface coating or corona discharge method to improve the surface energy.
There are two kinds of structures on the surface of the adhesive layer: planar meshfree structure and reticulated structure. The former is used in direct contact with the blank, natural exhaust, suitable for small area labels. The latter imprints the reticulated structure on the surface, and when in use, Cov pa roj yog tso tawm los ntawm cov pa hluav taws xob reticulated, yog li zam kev tsim cov cua npuas. Cov nplaum txheej kuj muaj cov khoom siv antistatic los tiv thaiv ob daim ntawv thaum luam ntawv; Ntxiv rau, nws tseem muaj cov khoom zawv zawg kom ntseeg tau tias cov ntawv sib cais du ntawm cov ntawv lo, ua rau cov txheej txheem luam ntawv du.
II. Sino IML daim ntawv lo luam ntawv
Cov chaw luam ntawv sib txawv tuaj yeem xaiv cov txheej txheem luam ntawv sib txawv raws li lawv tus kheej cov khoom siv. Offset printing, Flexo printing, Relief printing thiab gravure printing yuav siv tau los luam nyob rau hauv-pwm daim ntawv lo, Rau offset thiab flexo printing.
1. Offset printing
Offset printing muaj heev tseem ceeb zoo nyob rau hauv fine dot printing, tab sis kab, teb printing nyhuv thiab printing saturation yog qis dua lwm txoj kev luam ntawv. Offset printing zoo li flexo printing (Inline) printing processing, so printing must be Offline (Offline) die-cutting, cold stamping, glazing and other processes. But offsctdruckereien suitable for small batch label printing, short cycle, strong flexibility.
2. Gravure printing
Field printing and printing color saturation is superior to offset printing, not suitable for printing small dots and rich layers of trademarks. But the chromatic aberration control is more convenient. In gravure press, in-mold label material than another printing path to the paper, so there is a greater chance of static electricity. Gravure printing plate high cost, long cycle, so suitable for the long version of in-mold label printing.
3. embossing
Letterpress is suitable for printing on-site and line trademarks, printing small dot effect is not ideal, the same batch of products are easier to control the color difference, T. a, b.
4. Flexography
s, i, s. Now, with the improvement of flexographic plate-making technology, y. u, a, v, experienced manufacturers are using a good flow of UV Ink, m.
Ⅲ Post-processing of Sino IML
In-mold label printing, according to customer requirements also need to glaze, bronzing and die-cutting and other post-processing.
1. Polish
In order to improve in-mold label gloss and product surface decoration characteristics, and in order to improve in-mold label and high-temperature resistance, printing in-mold label can be glazed. In labeling, if the use of vacuum adsorption in-mold label, should be appropriate to add antistatic agent and adjust the smoothness of light oil; if the use of electrostatic adsorption in-mold label, on the oil should not add antistatic agent; If the in-mold label printing also need stamping should be used for bronzing UV varnish; if the Polish added additives, before glazing should be tested to avoid the whole batch of products scrapped.
2. Gilding
N, y. o. b, the use of cold stamping to obtain a better visual effect requires a higher technology, r, a. u, this technique is recommended.
h, a, u, v. -, Hot Sol should be used in hot sol melting point is lower than the hot sol melting point of gold foil, and strictly control hot stamping pressure and time, to avoid in-mold label material concave-convex deformation. Hot stamping, first in-mold label material characteristics and anodized stamping suitability as the premise, adjust the size of the stamping plate and stamping speed to determine stamping temperature and stamping pressure, first adjust the pressure, and then determine stamping temperature. Overall, stamping can improve in-mold label added value.
3. Die-cutting
In-mold label die-cutting and poker die-cutting mode are very similar to cut-off die-cutting. Because die-cutting is the last processing process of the in-mold label, die-cutting, when the electrostatic removal is very important, because the electrostatic removal is not ideal, will lead to stack is not tidy, resulting in labeling location and double-sheet problems.
In-mold label die-cutting is divided into sheet-fed die-cutting and web die-cutting two ways, which specific way, according to the manufacturer’s equipment and in-mold label material type. In this two die-cutting, web die-cutting is divided into line die-cutting (Inline Diecut) and Offline DIECUT.
Web flat die-cutting mode applicable to the web in-die label materials, this is an off-line die-cutting mode, die-cutting precision is very high. It has two ways of feeding paper, one is intermittent feeding paper, the die-cutting device is only up and down movement; the other way is continuous feeding paper, die-cutting device not only up and down movement, but also back and forth swing. Ob txoj hauv kev ntawm kev ua haujlwm tom qab daim ntawv lo tuag txiav conveyor mus rau qhov chaw nres tsheb stacking.
Nruas ntawv tig tuag-txiav yog siv tau rau lub nruas tuag daim ntawv lo, Tuag-txiav hauv ob txoj hauv kev: Online tuag-txiav thiab offline tuag-txiav. Rotary tuag-txiav yog qhov zoo tshaj plaws tuag tej txoj kev, Nws cov tuag-txiav precision yog siab heev, Tab sis tus nqi ntau lawm ntawm cov tuag tej yob yog siab, Haum rau ntau tshaj li 100,000 Teeb ntawm cov ntev versions ntawm daim ntawv lo sab hauv. Qhov no tuag-txiav txoj kev yog siv nyob rau hauv flexography ntau lawm, Yog siab efficiency, Ntau nrov nyob rau hauv lub tebchaws United States.
Sheet-pub tiaj tus tuag tej haum rau ntawv-pub tuag tej daim ntawv lo khoom, Qhov no yog ib tug offline tuag tej txoj kev, Ua kom raug yog dav dav, Los ntawm tsis siv neeg ntawv feeder, Tuag-txiav tsis siv neeg khib nyiab kab, the finished product label is placed on the stacking station by the manipulator.
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w, Kev siv lub tshuab nqus tsev los ntawm ib daig rau hauv kab noj hniav, kev siv extrusion yas kub thiab nqus huab cua siab, daim ntawv lo thiab lub raj mis yas yaj rau hauv ib qho. Now, Sino IML muaj ob txoj hauv kev: nqus tsev nqus hom thiab electrostatic hom.
Lub tshuab nqus tsev hom yog qhov feem ntau thiab siv dav nyob rau tam sim no. Cov tuam txhab yas ntim khoom lag luam tuaj yeem ntxiv rau hauv thawj pwm nqus tsev micro-qhov, Tsis muaj cov khoom siv tshwj xeeb, tus nqi qis, siv cov nyhuv zoo heev, thiab tsis yooj yim los ntes lub tshuab nqus tsev cim, cov thev naus laus zis tam sim no paub tab heev.
Qhov zoo tshaj plaws ntawm cov thev naus laus zis no yog tias nws tsis tas yuav hloov kho cov khoom siv qub tshuab molding, tab sis tam sim no, Tsis muaj rooj plaub muaj kev vam meej hauv peb lub teb chaws. Tus qauv electrostatic muaj qhov yuav tsum tau ua tshwj xeeb rau Sino IML thev naus laus zis, Cov khoom siv thiab cov khoom siv lub cev ntawm cov ntawv lo:
1) Ib qho hluav taws xob siab (ESD) System yuav tsum tau ntxiv rau hauv lub cuab yeej kom sib npaug siv hluav taws xob txaus rau daim ntawv lo rau lub sijhawm luv luv thiab txuas daim ntawv lo rau lub tshuab molding kab noj hniav ntawm xoom muaj peev xwm los ntawm caj npab neeg hlau.
2) Lub electrostatic tshem tawm system yuav tsum tau ntxiv rau cov khoom siv kom tshem tawm cov hluav taws xob seem zoo li qub tom qab txhua daim ntawv lo thiab kom tsis txhob muaj kev cuam tshuam rau lub tshuab tswj hluav taws xob ntawm Sino IML tshuab thiab qhov tshwm sim ntawm daim ntawv lo adhesion tshwm sim los ntawm hluav taws xob zoo li qub.
3) Yuav tsum tau siv daim ntawv lo substrate thiab luam ntawv number case yuav tsum tau siv.
V. Qhov zoo ntawm Sino IML
1. Zoo nkauj tsos
Lub Sino IML yog tsim nrog lub thawv yas. Tsis muaj ces kaum ntawm daim ntawv lo yuav pom nyob rau hauv lub raj mis yas lub cev. Nws zoo nkaus li zoo nkauj heev. Secondly, vim hais tias Sino IML printing nyhuv yog zoo, haum rau printing cov ntsiab lus thiab screen zoo phau ntawv, thiaj li muaj zog pom kev ua tau zoo. Vim hais tias lub Sino IML tsis muaj ib lub ces kaum, nws yuav tsis zoo li nws tus kheej nplaum raws li “ploj lawm” thiab “ploj lawm” phenomenon. Nyob rau hauv ib puag ncig noo, Sino IML yuav tsis bulge, kuj yuav tsis pwm.
2. Kev ruaj ntseg
Tam sim no, tsuas yog ob peb lub tuam txhab hauv Suav teb muab Sino IML cov kev pabcuam, vim tias kev nqis peev loj hauv cov khoom siv ib zaug. Hauv pwm tsim, daim ntawv lo luam ntawv thiab ua haujlwm, cov txheej txheem sau npe muaj ntau yam, yog li ntawd muaj kev thaiv rau Sino IML, rau forge, cuav trademarks tsis yog ib qho yooj yim ua hauj lwm. Now, nrov heev self-adhesive daim ntawv lo vim tias cov thev naus laus zis paub tab heev, kev cuav yog qhov yooj yim, thiab tus nqi qis, yog li cov khoom cuav yeej, ua kev puas tsuaj rau cov kev txaus siab ntawm cov neeg tsim khoom. The use of Sino IML, so that the manufacturers to eat anti-false certainty, finally can breathe a sigh of relief.
3. Recycle
The Sino IML material and the plastic bottle belong to the same material, after the consumer uses the product, the plastic bottle can be crushed together to recover, the recovery efficiency is high, the cost is low, belongs to the green environmental protection packing material. If it is a self-adhesive label, recycling more trouble, need to tear off the self-adhesive label, the bottle of adhesive removal, recycling, low efficiency, and recovery costs. Yog li ntawd, Sino IML are in line with the development trend of green packaging.
Ⅵ Application of Sino IML
From the domestic and international development, Sino IML is mainly used in the following industries:
1. Oil Industry: including lubricants, gear oil, antifreeze products such as plastic container packaging.
2. Daily chemical industry: Shower Gel, tshuaj zawv plaub hau, detergent, detergent and personal care products and another product packaging.
3. Food industry: soy sauce, ice cream, coffee, fruit juice, tea drinks, yogurt, and other products packaging.
4. Pharmaceutical industry: High-End drug packaging
In Europe and the United States, Sino IML development began to enter the track of stable development; in China, Sino IML is 70% of the speed of high-speed development. Looking forward to the future, the Sino IML will be a strong challenge to self-adhesive labels and will eliminate the paper-based Sino IML, completely to the plastic material label direction. Furthermore, more and more end customers will use Sino IML.
