NOVA Chemicals has fulfilled the promise of developing all-PE films with the world’s first high density polyethylene (BOPE-HD) resin designed to run in the tenter frame process. SURPASS® TX150-A enables an all-PE biaxially oriented print web, which can be laminated to an all-polyethylene sealant web. This PE on PE structure meets brand demand for a package comprised of a single material due to its potential to produce high quality feedstock for recycling. Several film formulations have been successfully trialed on commercial, semi-commercial and pilot scale equipment. We have worked with film producers and equipment manufactures across multiple regions and are proud to have established a global supply of BOPE-HD films.
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Technical Features/Benefits
The successful development of NOVA Chemical’s BOPE-HD films is the direct result of collaboration with a global stretching line manufacturer, Brückner Maschinenbau, and a number of biax film manufacturers.
NOVA Chemicals developed MDO films with 100% HDPE based on SURPASS HPs153-A. The films show exceptional stability due to broad orientation windows when produced on commercial scale inline MDO blown film equipment. MDO-HDPE films can be used to replace BOPP and BOPET to produce fully recyclable all-PE laminates with high stiffness, excellent heat resistance and outstanding optical properties.
Technical Features/Benefits
MDO-LLDPE films are designed for superior toughness and puncture resistance. Market demand for lighter weight packages can be attained with thinner gauge MDO-LLDPE films by replacing thicker blown films thereby using less material for equivalent performance. These films can also be used in laminates to provide toughness in applications where the mixed materials that were traditionally used are no longer viable in the pursuit of a monomaterial package. MDO-LLDPE films were developed using the SURPASS SPsK919-F and SCLAIR® FP026-F resins for packaging sharp products, pet food and frozen foods.
Technical Features/Benefits
Over seven million tons of polyethylene-coated paper products are manufactured every year, making PE the most used coating agent for paper packaging.
The popularity of PE comes from its effectiveness and cost-effectiveness, which is hard to match with other materials.
So, let’s look at what poly-coated paper is and understand why it is the most popular paper coating solution globally.
As the name suggests, PE coating paper is a paper roll coated with polyethylene to make the paper water and grease-resistant.
The coating substance (PE film) is heated up and made into a thin film no more than 0.04cm thick. The hot film is then pressed onto the surface of the paper board to create a layer. This process will make a tricky coating hard to strip off the paper.
So the resulting polyethylene-coated paper is water-resistant and sturdier, making it perfect for manufacturing all types of food packaging.
Polyethylene is made from sources that come from natural gas and crude oil. The process involves creating multiple reactions of ethylene molecules in the presence of a catalyst.
This reaction breaks the double bond of the molecules and helps the carbon atom connect to the chain. The length of the chain defines the molecular weight of the resulting material.
The thickness of PE coating paper is calculated in grams per square meter. The higher the GSM number, the heavier the paper due to its thickness.
Generally, the quantitative thickness of PE coating used on paper is 10-20 GSM.
However, the required thickness of PE coating changes according to various requirements.
Some common examples that can help you choose the correct quantitative thickness of PE coating appropriate for your purposes are mentioned below:
As mentioned earlier in this article, different paper applications require a different thickness of PE coating to be effective.
Following that same point, you need to put a different thickness of PE coating on various paper types as well. Some examples are mentioned below.
Matte Finish Treatment
Matte PE film is used for making high-quality product packaging labels that have impeccable sharpness and uniformity for the print on top of it.
Whether it is for printing labels of cold drinks or grocery items, matte PE film can be used to create visually attractive labels that are vibrant.
Matte PE film has a non-reflective surface, which allows the labels to be very easy-to-read and detect even in the middle of other products.
Glossy Finish Treatment
Glossy PE film is used for making various types of packaging products, mainly products like PE-coated paper cups.
It provides excellent water and moisture protection, making the cups very effective.
Apart from food packaging, glossy PE film is also used for making bright and shiny packaging that can draw the attention of onlookers and help products stand out.
Single Side PE Coated Paper
Single side PE coated paper has plastic coating on paper only on one side. It is used for making disposable food packaging containers.
The insides of the container are coated with PE to make the container water and moisture-resistant and sturdy and resistant to tearing.
However, the PE-coated side is also not great for printing branding information, which is also why customers choose double pe coating if they have a great demand on printing quality
Double Side PE Coated Paper
Double-sided PE coated paper is mainly used for disposable cold food packaging, namely ice cream cups. Just like single side, PE coated paper; the insides are coated to make the paper water and moisture resistant.
However, the outer layer needs to be covered with pe film in the paper container used to serve cold drinks.
Double pe coating is done to ensure that the cup does not crumble upon the condensation of atmospheric moisture on the cup when cold drinks are served in it.
In addition, the double coating makes the packaging products very sturdy and maintains their shape even when used to serve cold food or beverages.
Contact us to discuss your requirements of what is pe film. Our experienced sales team can help you identify the options that best suit your needs.
Moderate MVTR Permeability
MVTR or moisture vapor transfer rate is the property that tells how good your packaging material is at keeping dry products dry and moist products moist against environmental differences.
Any good packaging material is expected to keep the products in their original state, whether dry or wet, regardless of environmental conditions.
PE coating achieves intermediate results in this case as it provides average to good MVTR permeability.
Good Grease/Oil Resistance
When you pack your favorite fries at a restaurant, the PE-coated packaging will ensure that your hands remain oil and grease-free.
The PE coating does not let the oil or grease permeate through the paper packaging and keeps the outer surface of the packaging dry and oil-free.
Good Heat-seal Ability
One of the best features of PE coating paper is that it can be sealed shut using heat.
Since the paper packaging is lined with plastic, the heat sealing machine can remelt the plastic and seal the package shut.
This will help you keep the contents inside the paper package hot or cold as they were meant to be.
Relative Chemical Inertness
Even though PE is a chemical product, it is relatively inert to other chemicals and materials.
This makes PE coating paper very easy to use in different industries. Chemical inertness is one of the contributing factors to the versatility of PE coating
Flexible
Paper by itself is flexible to a certain extent, but it tends to tear if you crease, groove, and fold it repeatedly.
That lack of sturdiness can be fixed when the paper is coated with polyethylene.
PE coating by itself is very stretchable and flexible. When force is applied to polyethylene, it stretches instead of breaking.
So, paper coated with PE also gains the good properties of polyethylene, making the product very flexible and sturdy
Highly Permeable To Oxygen Gases
Oxygen may be the giver of life, but oxygen promotes bacteria and other microorganism growth that will spoil any food or other items inside the packaging when it comes to packaging.
PE coating is limited in this department because it is highly permeable to oxygen gases, making it not a suitable packaging material with a long-term shelf life.
Is PE Coated Paper Biodegradable?
No, PE coated paper is not biodegradable. It can be recycled, but that is a long and slightly expensive process compared to other products.
However, new coating solutions have been developed, such as PLA liner and water-based barrier coating, which are 100% biodegradable and sourced naturally instead of being sourced from crude oil and natural gas.
Is PE Coating Paper Microwavable?
No, PE coating paper is not microwavable because PE has a low-temperature resistance performance of around 80-100 Centigrade.
If that temperature barrier is reached or crossed, PE can expel poisonous substances such as PFAs. So, that’s why most PE-coated paper products are not microwavable.
So, that is all the information you need to know about PE coating paper to prove why it is the industry leader in paper coating.
Sure, PE has its disadvantages and problems regarding biodegradability, but it is still one of the most cost-effective paper coating solutions available on the market.
It also has a tried and tested track record of providing excellent paper coating service. So, if you are interested and wondering about PE-coated paper price, you should know that it will be less than the most equally effective paper coating solutions in the market.
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