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LDPE: Best Solution for Shrink Film and Packaging

LDPE: Best Solution for Shrink Film and Packaging

By GAP Polymers Team - On May 9, 2022 06:37

LDPE (low-density polyethylene) is produced by the polymerization of ethylene in high-pressure reactors, LDPE can be identified in many daily life products, and considered one of the more economic types of polymers, as it has excellent properties, such as flexibility, toughness, and relative transparency, also it is easy to fabricate and form.

1- Is LDPE material eco-friendly?

Plastic number 4 LDPE material seems to be non-biodegradable and harmful to the environment, as it has been widely used due to its properties, which leads to pollution because LDPE materials are dumped in landfills.

But there are researchers working on solving this environmental problem by modifying the non-biodegradable thermoplastics to biodegradable materials after degrading them into low molecular mass fragments that can be assimilated by microorganisms.


2- Can LDPE Polymer be recycled?

LDPE recycling is a process in which products are heated which can turn them into plastic sheets, and it has the ability to tangle into recycling machinery.

Recycled LDPE can turn into various final products such as trash bags, agricultural products, furniture, and pipes.

For instance, LDPE plastic bottles are not necessarily turned into more plastic bottles after recycling, but they can be useful in other applications such as clothing manufacturing and carpet treating, that’s because of the degradation of LDPE materials.

LDPE for recycling purposes is an option for eliminating commercial waste and is often used by plastic companies to showcase that they are doing their part in helping the environment.


3- What are low density polyethylene properties?

  • LDPE is low density 0.91-0.94 g/ cm3
  • LDPE Melting point is ~115°C.
  • LDPE has chemical resistance to most alcohols, alkalis, vegetable oils, and acids, and has low resistance to hydrocarbons and oxidizing agents.
  • When it comes to heat resistance LDPE density decreases drastically when exposed to temperatures beyond 20°C.
  • LDPE has high transparency due to amorphous conditions, which makes it good for heat sealing for packaging applications.
  • LDPE strength increases in cold conditions.

4- Is LDPE plastic food safe?

LDPE does not leach harmful toxins at various temperatures because of its chemical resistance, but recycled LDPE is not safe for food contact, and compared to other plastic resins LDPE is the best as it is thin, tough, flexible, and impact resistant.

 

5- What are the advantages and disadvantages of using LDPE material?

Let’s start with the advantages of LDPE, it is a low-cost waterproof material, it is resistant to acids and bases, it has a wide variety of uses, and it is easy to mould and process.

When it comes to the disadvantages of LDPE, it is not useful in extremely low or high temperatures, it is more prone to crack stress, and it has a high permeability to gases such as carbon dioxide.

 

6- How can we produce LDPE?

Low density polyethylene material can be produced by ethylene gas compression through a tubular reactor and a stirred autoclave, and the polymerization process goes through the gas separation and the initiator.

 

7-What products are made with LDPE?

Low density polyethylene uses varies as it is widely used in many applications such as:

  • Plastic bags
  • Coatings for paper milk bottles
  • Computer hardware packaging and covers
  • Wash bottles
  • Light packaging bags

And in everyday life, you can find LDPE in many applications such as:

  • Kids toys
  • Squeezable bottles for condiments such as ketchup, honey, and mustard.
  • Shrink-wrap and stretch films

8- What is LDPE shrink film?

There are different raw materials that the shrink wrap film can be made from, such as Polypropylene, Polyolefin, PVC, and Polyethylene.


PVC and Polyolefin are used in the retail packaging industry, but polypropylene and polyethylene are used in applications that need heavy shrink wrapping.

 

9- What about the LDPE shrink film manufacturing process?

Heat is the key in the shrink film manufacturing process, when heat is applied to it by gas or electric heat gun, through the heat tunnel, it shrinks over the products tightly.

 

10- What are the Advantages of using LDPE shrink wrap for packaging?

When it comes to shrink film, LDPE is the best in creating film rolls for packaging because it’s strong and flexible, so it is ideal to use for products protection, here are five advantages that make LDPE the first option for most manufacturers and producers:

Zero-waste

  • LDPE can be collected and recycled easily to create new products, so most manufacturers prefer it, as they can develop a zero-waste from LDPE shrink film for distribution and bundling.
  • Shrink bundling from LDPE reduces the amount of packaging required, creates fewer greenhouse gases than alternative packaging.

Diverse types of wraps

  • LDPE has flexible properties, which help in producing different wraps, and it can create unitized packs because it can protect products from dust.

Various Film Blends and Thicknesses

  • LDPE offers an array of thickness fit for all packaging needs from thin effective parries for food products, to protective layers of wrap-around products.
  • LDPE film packaging ranges between 1.0 to 4.0 thousandths of an inch, so it offers flexibility for many types of products and applications.

Shipping cost decreasing

  • Manufactures figured out that using shrink bundling products in LDPE film minimizes the weight and the overall size of a package, which can decrease the shipping cost, as they can put more products in the truck.

LDPE Film shrink potential

  • LDPE shrink wrap for packaging has many benefits, as it has a low melting point and great thickness that allow them to use it for heavier items and food products.
  • LDPE does not have many drawbacks such as alternative shrink-wrapping materials like PVC (polyvinyl chloride).
  • LDPE has FDA approval (the Food and Drug Administration), so it is safely used in rapping food items.

 

11- What is LDPE film used for?

LDPE film is the best choice for packaging materials because LDPE has a unique structure, it is very soft but strong, it is safe to use in the food industry, it also has resistance to acids.

LDPE film resins match large markets for LDPE films such as bread bags, cleaner bags, shipping sacks, and towel overwrap.

 

12- Who are the best suppliers and distributors for LDPE?

The top plastic raw material suppliers for LDPE are:

  1. EMCO Industrial Plastics.
  2. Industrial Plastic Supply, Inc.
  3. GAP Polymers
  4. Trident Plastics, Inc.
  5. Applied Plastics Co., Inc.
  6. Griff Paper & Film

Click Here for additional information about LDPE grades.