In recent years, the design of PET beverage bottles has been refined. Among other aspects, the weight of each bottle has been reduced, thus reducing the amount of material needed and making the bottle more environmentally friendly.
What are the main features of PET bottles for edible oil and what are the benefits compared to other materials (particularly HDPE, glass, tin and cardboard)?
We summarize them in points:
- PET presents a quality appearance, transparent and shining, similar to glass but unbreakable;
- Its transparency allows to show the product to consumers;
- On shelves it allows an occupied space optimisation and an effective exposure;
- Great flexibility of bottle design;
- Suitable characteristics to increase impulse buying;
- It is the preferred material by companies marketing departments for bringing new products to market;
- As for edible oil, the market runs in rigid and transparent forms direction;
- This is a 100% recyclable material;
- Has a very wide range of sizes, from 100 ml to 20 litres and beyond; in this case can also be stackable;
- With ultra competitive costs. Compared to glass, you can save up to 30% on shipping costs with PET
- Good barrier: PET products allow for low permeability of water, carbon dioxide, and oxygen. These characteristics help protect and maintain the integrity of each product.
The extreme PET lightness makes this material more competitive compared to other materials used for Pet bottle production systems for edible oil.
Polyethylene terephthalate overcomes the challenges with other materials offering the following ratio between packaging size and average weight:
Size, ml Weight, g
Comparing PET with other edible oil packaging materials
We believe it is useful to make some comparisons with other materials commonly used by packaging line edible oil market.
PET vs polylaminate cardboard
As an example, the polylaminate cardboard (75% paper, 5% aluminium, 20% polyethylene) with regards to packages of 200 ml, has a weight of approximately 9 g, for those from 1000 ml of oil, gets to 30 g.
PET bottles, unlike carton packages, they have a transparency advantage as well as providing greater mechanical strength.
The weaknesses of the edible oil packaging cartons, relate to:
- Limited size packaging options
- Total lack of product visibility
- High raw material costs
- No shape flexibility
- Higher complexity as far as packaging recyclability is concerned
PET vs HDPE
High density polyethylene (HDPE) is a material mostly used for medium and large edible oil bottles.
Compared to PET, high-density polyethylene means a greater weight.
A pack of 5 litres of high density polyethylene (HDPE) weighs 200 g against the 85-115 g of PET.
Beyond the weight, high-density polyethylene has a cost greater than PET equal to 15-20%.
PET vs glass and tin
Tinplate and glass have similar problems: first, high raw materials costs, but there are also questions relating to the factors of packaging possible damages during palletizing and transportation. Weight is also higher than PET.
The following is an symbolic weight comparison for 15 litres oil containers:
PET : 300 g