A plastic bag, also known as a polythene bag or poly bag is a type of carriage vessel or container made from thin, flexible and nonwoven material or plastic textile. It is the most common type of packaging all over the world up until recent years which sought to see the banishment of these poly bags in parts of the world. Most poly bags are sealed together by means of heat and some stitched or bonded with the use of adhesives.

Uses of poly bags

The areas of applications of poly bags are virtually limitless. They are mainly used in the storage and transportation or packaging of various goods like farm produce, foods, magazines, chemicals and even waste. Poly bags are used to protect their goods content during transit from harmful agents such as moisture, dust and dirt that may damage goods.

Poly Bags

Types of poly bags

There are a variety of poly bags designs based on the nature and weight of the items in question to be transported. First we have lighter density poly bags that are the right pick to go for when dealing with items that aren’t heavy by weight and do not require extreme protection from the surrounding environmental agents. Heavy density poly bags deal with more adverse and abusive environments where environmental agents may cause harm to the carried goods.

The shape of poly bag also has a role to play in determining the area of application. Flat poly bags are more general purpose bags which are designed for ordinary usage where clear displaying at a low cost is preferred. For protection against the dirt, dust and moisture agents, a reclosable poly bag is advisable which allows for easy sealing and resealing of the poly bag keeping the contents unharmed. Garment poly bags as the name suggests are specially designs for use with clothes e.g. shirts, coats and trousers for their protection; ease of use and for maintaining the garments in their optimal mint condition. Poly film and poly tubing find their use where large quantities are required.

Styles of poly bags

There are a variety of styles that are used in the creation of this poly bags which include flat poly bags, poly bag tubing, poly film and poly sheeting, self – seal poly bags, garment poly bags, gusseted ,wicketted and reclosable poly bags.


Various design options and features are available with some poly bags having gussets to allow for a higher volume of contents, some possess the ability to stand on a shelf or refrigerator top and others with opening and reclosing options as well as handles added into some for ease in carrying. Poly bags generally use less material as compared to boxes, crates or cartons and as such are considered as a reduced packaging means. Poly bags can be used for plastic recycling depending on their construction and as well can be burned down in proper waste to energy conversion. If these poly bags are wrongfully disposed of say in the environment, they have harmful effects to some types of nature and wildlife causing different forms of environmental pollution.

Some bags are made to withstand the temperature in boiling by making them from tough heat sealed nylon or polyester material used to hold sealed frozen foods. These bags are known as boil – in – bags and some may even be porous or perforated to allow for the hot water to percolate through and make contact with the food or stored material. Bag- in- box is also a type of packaging used or holding liquids such as box wine etcetera.

Medical uses.

Poly bags have seen widespread usage in various fields including the field of medicine where the non- porous quality of plastic material (in this case) ensure they are useful in isolation of bodily fluids. However other porous bags made from plastic material that is nonwoven can be sterilized by gaseous means and maintain this sterility so it can be used when a particular infection is a health risk. They are as flexible as they are light weight and as such can be carried or laid out on patients without making them feel uncomfortable as would have been the case with a glass bottle which would be heavy. Poly bags are a less costly and reusable option for packaging.