self-wound overlamination: a favorite super hero of flexo label printers.
\"Stronger than UV varnish!
\"Able to skip thousands of feet of label inventory with a roll of paper!
\"While it sounds like the signature of one of America\'s oldest and most popular superheroes, it also describes the character of the self
Today, in the narrow network label industry, it is wrapped together. [
Aside from humor, not every product can get the status of a superhero,
The wound stacks have certainly played this role for many years.
This is a major product in the industry since mid-1980, and it has been disguised as a gentle label printer
Courtesy Clark Kent-
Anonymous invisible protector
This is a commodity product that provides an invisible layer of strength and durability when applied-
Products that perform a key function, but a majority of label printers take for granted, tend to ignore the plates, inks, molds, and stocks in order.
Just as the development and evolution of the flexo printing industry, over-lamination technologies, materials and processes are also evolving.
Who can think of the printing method called \"Bi\'s stupidity\" on the achievedin 1890 printing machine, reviewing the next century, has evolved into the most common, the fastest printing process in the world!
Now, thanks to its ability to perform many different conversion processes online on almost any substrate ---
From simple paper to exotic synthetic materials-
Narrow-screen printing is the primary, most innovative and cost-effective source of stress-sensitive labels in the world today.
Since the first Greek marked a glass of wine with the vintage produced by the wine, or an ancient miso businessman decorated a bucket of grain to attract the beauty of his clients, labels and labels have become an integral part of our culture, our way of life and our economy.
Merchants for centuries
The manufacturer places information related to their goods on pottery jars, pottery, water bottles, bags, barrels and crates.
In the industrial revolution in the late 1800 s, the first \"modern\" label appeared, when the fundamental nature of production and distribution changed.
It\'s hard to believe that the most important event in label history didn\'t happen until the 20 th century.
Until the beginning of 1930, R.
Stanton Avery made the first one.
Tag and turn it into a thriving business that is still successful today.
Into the 21 st century, self
Adhesive or pressure sensitive labeling is the dominant technology for product information, decoration and identification.
However, pressure sensitive labels are required to meet many different needs ---
Graphics, finance, environment--
Because they\'re still a part of it. billion-
Dollar packaging industry driven by complex consumer preferences
Increasing industrial demand in a highly competitive global market.
The two biggest requirements that the label requirements meet are durability and cost.
Obviously, the most basic but important feature of any tag is that it maintains its ease and persistence in a specific application.
To do this, the information and graphics contained on the label must be legible and continue over time.
Unless you print the label in the disappearing ink
Secret organization, it doesn\'t matter how expensive or strange the basic inventory is ---
Or how many process ink colors have been used--
Or if the label does not last long or becomes illegible, how good is the quality of registration or printing.
In general, the main role of lamination is to provide protection against the destruction of labels from the outside of all chemical and environmental contaminants.
It protects the labels of many potential intruders, including moisture, chemicals, oil, acid, dirt, wear, and even the Sun\'s faded UV rays.
Unlike releaseliner, for example, it is usually discarded long before the label reaches its final destination, and the stacks become an integral part of the label itself.
Because it has this important function, it is a key component of most tag structures.
Select lamination (
According to the function of each label and the specific terminaluseapplication)
This provides protection, increases durability, is cost-effective and easy to use, and is a key part of the laboratory construction process. Unsupported (linerless)or self-wound (The wound itself)
The flexible label printer has chosen over-lamination, which is both economical and troublesome --
Free way to add durability to the label, tear-
Resist and protect the harsh environment for nearly 30 years.
Today, most narrow web flexo tags printersprefer self-
The wound and almost every narrow network converter, whether or not they use it, are familiar with this lamination method.
The construction of the first self
Simply put, the cartonsealing tape is wound together.
Its coating weight, film thickness and even roll length are the same as the machine length roll of transparent polypropylene cartonsealing tape.
Compared with the pressure sensitive adhesive film on the release pad, this early product saves costs (
Often referred to as \"support\" or \"linered\" overlams)was enormous.
Not only is it much cheaper, but its composition and placement over time
To meet the specific needs of the flexo label printer, ups made changes.
The film produced is thinner and more in line with the requirements;
Different adhesives with better moisture resistance have been developed;
The lighter coat weight is realized and it is easier to relax.
In order to \"match\" the roll length of the label stock, the slit roller length is from 3,000 feet to 2,500 and 5,000 feet.
Further improvements in manufacturing technology and coating/cutting capabilities have led to a rangewoundproducts. Today, self-
Winding stacks are the most versatile stacking process, as it provides label printers with a wide range of films, finishes and thicknesses to suit almost any application;
Its roller width and length can meet almost all production requirements;
Its ease of use and convertibility are unmatched.
Two main components of self
Its film and adhesive are wrapped together.
As mentioned earlier, biaxially-
Oriented Polypropylene (BOPP)
Is the only original substrate available for many years.
It is still the most commonly used laminated substrate.
The same features make it a good carton sealing strip, making it a huge overlap--
It\'s tough, durable, torn
Because it is a film, not just a coating, it provides an effective protective barrier for the label.
This is particularly important for refrigerated food labels, such as milk and dairy labels, as labels on labels may be in and out of cold storage.
Polypropylene is very good to maintain moisture due to repeated condensation and a series of other hard conditions.
It also protects the label from the content of the product it identifies and is commonly used as a laminated material on corrosive, corrosive and acidic products-
Everything from kimchi to car batteries.
Because it is wear-resistant, it is used to \"tamper-proof\" important data labels such as batch numbers and expiration dates.
The superior internal strength of polypropylene provides extra strength and stability for the label inventory it covers, adding \"body\" and enhanced gloss to the finished label.
In fact, many label converters have found that replacing expensive vinyls or styrenes with over-laminated paper can save money without sacrificing strength. [
Today, transparent polypropylene (BOPP)
Made of matte polypropylene, transparent polyester (PET)
, Mattepolyester and heat transfer printable polyester and more.
Each film has its specific application and use.
For example, there is a non-mattefinish movie
Reflective surfaces make them non-essential
In order to pick up the glare surface by sensitive scanner.
They are also ideal for cosmetic and beauty product labels that require a \"soft\" or \"soft\" look and feel, or when written
Because matte surfaces are often easily accepted by ink and pencils, they need to be on the surface.
Polyester Film provides greater moisture resistance, chemical resistance, wear resistance, heat resistance and UV resistance than polypropylene, which makes it the first choice for demanding applications, especially when labels are outdoors
Heat transfer printable film was developed to meet the needs of end users to print variable data and images on printed laminated labels.
Heat transfer printable polyester offers all the advantages of plain polyester film, as well as the printing suitability of most brands of wax/resin and resin ribbons on the market today.
While advances in film formulations have enabled manufacturers to offer more film, film thickness typically ranges from 1 mil to 2 mil.
Water-based or water-based emulsion acrylic acid is the most widely used self-adhesive material.
Because of its many features, the clarity of the highlight is just one of them.
Long aging time, anti-UV.
In addition, it\'s notyellowing, non-toxic and non-
The contamination properties make it significantly superior to Hot Melt Adhesive and solvent based adhesive.
Over time, the strength of its bond with the substrate gradually increases (
And keep it at extreme temperatures.
The latest advances in adhesive technology have led to the need for a new generation of \"ultra-transparent\" formulations with lower solid content (i. e. Block less)
And lower coat weight, resulting from
Three major challenges were eliminated almost immediately: bruises, humiliation and \"fish eyes \". Yes, fish eyes!
In addition to being a delicacy of Chinese cuisine, this is also a rather curious term used by label printers to describe the regular shapes, randomly distributed marks they appear in their self. wounds.
Fisheye is an inherent feature of self.
In the process of coating, slitting and rewinding, the film is produced due to air retention between the film and the adhesive.
They are not defects by themselves, and once the film is applied to the label inventory, they can hardly be detected.
As you might imagine, they are usually more visible on labels covered with dark ink or on shiny metal stocks.
The pressure of the finished label packaged on the volume actually \"squeezes\" them in a relatively short period of time.
Hearing the surprise label printer report that the \"fisheye\" that once covered the label disappeared \"magically\" overnight is not uncommon.
The new generation of \"super-clear\" movies actually eliminated \"bullying \".
These files are combined with \"harder\", \"bruises\"
Free \", producing water transparent adhesive for super transparent fish eyesfree self-
The stack of competitors.
They can be used to create perfection.
When over-laminated to clear the label inventory and provide easier color matching and better internal quality control for the label printer, the label looks better.
Noise is a challenging feature of the self. wounds. Allself-
When pulled down theroll, wrap the tape and the movie \"chatter \".
Most journalists use some kind of hearing protection when they run themselves, and the most popular is good old-fashioned earplugswounds.
Tension control devices can also be installed, greatly reducing tension levels and \"slapping\" and stabilizing the relaxation pulse to provide more consistent and controllable roller tension.
Finally, the manufacturer has been able to combine the new adhesive formula that requires a lower coating weight with a special silicone coating that reduces surface energy and reduces unfolding force to produce self-
Now the wounds of \"super clear\" and \"super quiet\" overlap.
Challenging \"curl\", \"wrinkles\" and \"tension\" is a hot topic for any local beauty salon, and there is no doubt that they are the most common web-handling issues associated with selfwounds.
The principles at work are very simple. Curling(
Up or down)
If the overlap is stretched when it meets the printed substrate, it occurs.
Resistance due to the spreading force requires the filling of stretched overlapping films from the roll \"stretch\" film.
The longer the film extends on a shorter, harder label inventory, the more it will eventually return to its original \"relaxed\" state (
Like elastic bands).
The result is Curl.
The drive between the return roller and the nip station, The grasped \"pull\" roller allows the operator to \"feed\" overlap with minimal tension, allowing the overlap to relax before meeting the substrate.
The Adancer roll can be used on old presses that cannot hold the adriven \"pull\" roll.
News manufacturers are familiar with the specific modifications needed to achieve this and can provide technical assistance.
On most printing machines, it is usually just to change the way the overlap passes through the printing machine.
If a specific press needs actual design changes, they are generally not expensive and easy to implement and are well worth it. [
\"Wrinkles\" or wrinkles and \"bruising lines\" are usually related to pressure release problems caused by incorrect speed or tension control, will benefit from some of the same pressure modifications and the elimination of curl. Tension (
It\'s a self-shared problem. woundproducts.
It affects the converter and the coating machine.
There is a good line between too much and not enough.
\"Scaling\" is a common tension
During the slitting process, related problems occur when the coil is wrapped too tightly.
This may be due to uneven bonding or film thickness in large rollers (called \"spec belt\"), or in wind-
This is not obvious, but over time it behaves as a built-in-
The rising pressure actually forces the film layer or the \"packaging\" to expand, making the roll look \"shrink.
It is worth mentioning that-
Same as all movie products. -
Careful material handling is essential.
The supplier\'s carton packaging and pallet transportation of finished roll, as well as the feasible storage, retrieval and network processing practices of the printer, will ensure small tear or edge damage (
The main reason for the expensive network interruption in the media)don\'t occur.
The long aging, UV-resistant acrylic adhesives and clearer films used by most manufacturers today have actually eliminated the problem of \"yellowing\", which is still a common self-complaint
A wound coated with Hot Melt Adhesive.
Versatility has never been the case before for a narrow web label printer to have such a high demand for its materials: huge versatility, easy to install, fast conversion, low waste, environmental compatibility, excellent quality and a few examples to name a few. Self-
The wound overlap meets the requirements of the head.
They clearly listed lams on a cost basis and did not deal with the additional financial and environmental costs of expensive liner paper.
They are more versatile and easier to use than the original film and UV-cured \"cold glue\" adhesive.
Not only does this system lack versatility, as rawfilm is only available in the thin gauge of the BOPP, but special equipment and additional energy are required to solidify the adhesive.
Its setup and cleaning time is longer and running time is slower, its adhesive needs to use the ink station.
A third laminating material consisting of uv varnish, cured under pressure, gives the label a \"look\" of lamination, but does not provide additional \"body\", only provides minimal protection,
Traditionally considered a cheap commodity.
Winding lamination has gained the respect of the global label printersworld and is now the first choice for most converters.
There are many kinds of film substrate, film gauge and adhesive thickness, which means that there are
To adapt to almost all applications, wrap the laminating system.
Special equipment is not required;
It was quickly established;
It does not need to be clean
Trouble running-free on press.
Its durability, higher clarity and cost-effectiveness offer many opportunities for the pressure sensitive label market. Karen L.
Frascella is the regional sales manager of the over-tiered division of Sekisui TA Industries in the north-east of the United States and Canada (STA), Brea, CA.
She graduated from Brown University and has worked in the industry for more than 15 years and recently worked as sales manager for supreme tapes (formerly J. B. Prata Ltd. ).
She can be at 800-258-8273, ext. 499.
STA has been making its own
Since woundoverlaminates 1978.
More information is available at www. sta-overlamination. com.