Frapak and FlexPET have been PET jars suppliers for over 10 years offering the standard range of clear PET jars in a variety of different designs and series, like straight cylindrical, Big Spender and Small Spender. The standard clear PET jars with 48mm up to 100mm necks and a volume range from 25ml up to 8 Litre are ideal for many products in the cosmetics, food and pharma markets. We are a PET jar wholesale supplier with many jars available in stock.
What are PET jars?
A PET jar production process starts with the raw material which, for these kind of jars, is PET - a polyester – that can be made in a glass clear and shiny appearance. One of the main advantages is that raw PET material can be stretched when processed to form long molecular chains resulting in very strong but lightweight PET containers.
The PET jar production process
Most jars are currently produced using single stage ISBM PET machines which inject the PET granulate into a preform where the neck finish, with low tolerances, is shaped and the product weight already determined. In the second step the preform is conditioned in order to distribute the heat in the preform evenly. In the third step the PET preform is moved onto the blow mold, stretched (vertically) and blown into a container creating biaxial strength which results in the creation of a perfect plastic PET jar. In the last step of the ISBM machine the jar is ejected and placed onto a conveyor for automatic packing.
Plastic PET jars are used for numerous products from body cream and scrubs to food stuff and vitamins tablets. As the packaging requirements on the various markets are different, Frapak Packaging offers PET jars in various weights and volumes ranging from 25 ml up to 10 litres.
Coloured PET jars
Using master batches or colourants the PET jars can be supplied in numerous colours. Depending on the customer’s requirement the PET jar can be coloured in a translucent or opaque finish. The most standard colours for PET jars are white, black and amber.
Weight: The weight of the packaging is already determined in the injection moulding of the preform and therefore cannot be easily changed. The manufacturer often chooses the appropriate weight that the bottle should be and determines what particular characteristics are required with regards to top load, drop impact and the ease in which the product can be easily filled, capped and labelled.
The PET Jar specifications
A PET jar consists of the following parts:
1. Neck PET jar
2. Body PET jar
3. Bottom PET jar
The PET material is injected into the preform during the first stage of the PET production process. The thread of the PET jar has very narrow tolerances and, as the neck of the PET jar has to accommodate a seal or a closure, we ensure the fitting is very smooth.
On the bottom of each PET jar there is a ‘gate’ which originates from the injection point of the PET jar preform. In some cases the bottom of the PET jar has a specific shape enabling the PET containers to be stackable.
Smaller PET jars
Smaller volumes of PET containers like 50ml, 100ml, 150ml jar and 200ml feature a 48-400, 63-400 or 70-400 standard neck finish to accommodate different plastic and aluminum lids. The subsequent volumes of 250ml, 300ml up to 500ml have an 89-400 neck finish allowing the PET containers to be fitted with different closures.
Frapak and FlexPET are the PET jars wholesale suppliers
In the same content range but increasing in size to 1 litre, the 100-400 neck finish allows the user to put his or her hand into the PET jar. The largest volumes like the 1500ml, the 3 litre up to 6 litre and the 8 litre jars have the largest neck diameters ranging from 100-400, 110-400, 120-400 up to 127mm. These big jars can be fitted with a lid with a handle.
These wide mouth plastic jars with higher content capacities are excellent containers for protein products and sport nutrition powders but can also be used for dried cooking ingredients and sauces. In this Power Packer series, Frapak Packaging offers various different models such as straight cylindrical and recessed versions.
Different shapes and designs of the PET jar
The shape of a PET jar is usually cylindrical but oval and rectangular shapes are also possible. The cylindrical designs of the jars allows for easy filling and labelling and, in larger containers, the label area can be recessed to avoid damage.
As the wall of the body sometimes needs to be strengthened, special ribs are placed in strategic spots on the PET container. Some designs can even feature a grip allowing the end-user to use the larger PET jars more easily.
Screen printed PET jars
The cavity number and the recycle logo are stamped into the bottom of the jar fulfilling quality and environmental requirements.
For screen printing of up to 6 colours, an orientation point is engraved onto the jar to ensure that the design of the silk screen is located in the right position.
The advantage of PET is that the surface has a very shiny appearance.
However, the marketing of some designs requires a more matt finish of the PET jar.
Matt and lacquered finish PET jars
In this case an additive can be used to make the surface of the PET jar more matt.If the design of the jar needs a matt finish which equates with the touch and feel of an acid etched glass bottle, then Frapak can provide a secondary lacquering.
All these type of plastic PET jars and containers are commonly used for cosmetic products like hair waxes and body scrubs but can also be used for packaging candy or fish food. The rigid PET jars have also proven to be particularly useful packaging for food and chemical applications like licorice candy and hand soap for industrial use.