Plastic bags

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Plastic bags are…

• Bags made from plastic for a variety of day-to-day functions
• Made from or polyethylene, usually referred to as polythene
• Also known as polythene bags, poly bags or polybags
• Available in a multitude of shapes and sizes to cover a range of uses
• Used for everyday tasks such as carrying shopping or disposing of waste
• Also used for more specialised uses such as wrapping furniture for storage or disposing of clinical waste
• Created using a process called 'blown film extrusion' or the 'tubular film process'
• Available in a range of coloured opaque polythene, or made from clear see-through polythene
• Available in a huge range of thicknesses - or gauge - to suit the job in hand, from delicate high-clarity display bags to ultra-heavy-duty rubble bags
• Often decorated with a printed design, to advertise a business or service
• Available in eco-friendly alternatives to polythene, such as biodegradable or polybio bags, that degrade when buried or they come into prolonged contact with compost

The A-to-Z of plastic bags

Polythene bags are used for a multitude of functions, from storage to waste disposal, retail display to transportation and postage to recycling.

Here is a list of some popular types of plastic bags, from antistatic to zip-seal, with a brief description of what they are used for:

Anti-static bags - Pink bags designed to protect electrical and electronic components from electrostatic discharge.

Asbestos waste sacks - Thick red polythene bags clearly marked with a 'Asbestos Waste' warning signs, for the safe disposal of asbestos.

Bubble bags - Protective bags comprised of a series of air-cushioned 'bubbles' that keep delicate items safe during transport or storage.

Clinical waste sacks - Thick yellow polythene sacks with warning signs, used for the safe disposal or incineration of clinical waste.

Clip-close carriers - Premium carrier bags with a plastic clip-close handle attached to the top of the bag for secure fastening.

Compost bags - Green bags made from 100% biodegradable material that are perfect for disposing or kitchen or garden waste.

Display bags - Crystal-clear, glossy polypropylene bags used by retailers to give their products extra sparkle whilst on display.

Dry cleaner bags - Thin clear or coloured polythene bags used by dry cleaners and laundries to protect clothes in transit or storage.

Eco-friendly bags - A range of biodegradable bags, offering a green alternative to regular polythene bags.

Fashion carriers - Premium carrier bags made from thick polythene with a punched out handle, popular with high-end retail outlets and gift shops.

Featherpost padded mailers - 'Jiffy style' padded mailing bags made from paper and lined with bubble-wrap to protect items in the post.

Film-front bags - Display bags with a clear polypropylene front 'window' and a paper backing, popular with bakeries and cake shops.

Fish bags - Clear heavy duty polythene bags with watertight seal, ideal for use in pet shops, aquaria, garden centres or funfairs.

Grip-seal bags - Plastic bags with integral seal that is squeezed close between forefinger and thumb. Also known as minigrip bags or grippa bags.

Greeting card bags - High clarity display bag made from polypropylene film used to wrap any type of greeting card.

Hercules bags - Extra strong, tear-resistant clear polythene bags suitable for handling heavy duty contents.

High tensile strength bags - Extra strong polythene bags available in either clear or blue-tint polythene.

Jiffy mailers - Featherlight mailing bags made from paper and lined with bubble wrap to offer protection to bag contents during postage.

Jumbo carriers - The largest carrier bags on the market, these giant bags are big enough to hold anything from bedding to large cuddly toys.

Kraft carriers - Popular with retailers, these quality paper carrier bags in a range of colours offer a great alternative to polythene carrier bags.

Laundry bags - Garment covers popular with dry cleaners, designed to protect your clothes and keep them clean after collection and in storage.

Mailing bags - Handy polythene envelopes with a fold-over seal used for postage, popular with online retailers and eBay traders.

Netting bags - Bags woven from knitted plastic and closed with a drawstring. Popular use packing onions or wood kindling for fires.

Packing bags - Clear plastic bags in a huge range of sizes, used to protect items during transportation or storage.

Patch handle carrier bags - The classic carrier bag with a reinforced patch handle for a stylish look and excellent bag strength. Ideal for printing with your own design.

PolyMax bags - Extra strong heavy duty bags available in clear polythene (with good clarity) or black polythene for the very toughest of jobs.

Recycling bags - Coloured polythene bags used to separate recycling waste into different types - e.g. paper, tin, glass, plastic - and dispose of in correct bin.

Specialist bags - Lesser-known polythene bags used to serve a specific purpose, such as clinical or asbestos waste disposal, dog poo bags, flower sleeves or sweet bags.

Specimen bags - Specialist grip-seal bags with a self-seal strip and an attached pouch to keep record cards, ideal for taking samples.

Stand-up food pouches - A fantastic way to display products, these clear bags feature an integral self-seal strip and a bottom gusset so the bag can stand up on the shelf.

Starch-based bin liners - A range of eco-friendly starch-based Polybio refuse sacks, these compostable bags are ideal for disposing of food, garden or kitchen waste.

Take-away bags - These classic white rigid paper bags are popular with takeaway restaurants, although plain vest carriers are often employed as an alternative.

Top tac bags - A range of self-seal bags, including display bags and mailing bags, featuring an integral peel and seal strip for convenient use.

Ultra-strong Polymax bags - Probably the strongest polythene bags available, these 400 gauge sacks can handle the heaviest of heavy duty jobs.

Vacuum bags - Thick clear plastic bags sealed by vacuum sealers, used in the catering industry for storing or cooking food, including fish and meat.

Varigauge carriers - Carrier bags made of polythene that varies in thickness, with stronger, thicker polythene at the top so that a reinforced handle is not required.

Vest-style carriers - Strong, thin, crinkly carrier bags with two handles that looks like a vest when laid out flat. The most popular carrier bag in the UK.

Wallpaper carriers - Extra wide, thick patch handle carrier bag ideal for carrying wallpaper or other wide items.

Waste sacks - Range of sacks used to collect waste contents, either as a bin liner or freestanding bin bag.

Wicketed food bags - Counter bags that tear off from a wire bracket, known as a wicket, popular with food retailers including bakeries and delicatessens.

Wrapping paper carriers - Extra long, narrow carrier bags ideal for carrying wrapping paper or other long, thin items.

Zipper bags - Premium self-seal clear polythene bags great for displaying contents. Feature an integral metal zip fastener for a sturdy feel.

Different types of bin liners - a discussion!

Recyclable bin liners can make waste handling simpler, nevertheless they only work well when the cost and the waste stream suit the site. A decent liner has to grasp together in the sackholder, survive sharp offcuts and damp contents, and still proceed through the assortment route without causing sorting trouble. If the film is also thin, it splits in use and creates more mess than it saves. If the specification is sound, operatours spend less time cleaning bins and the waste can be moved in a tidier, more controlled method. That makes the higher purchase price easier to justify where presentation and hygiene matter.

Recycled bin liners need to balance waste reduction with daily toughness, and that balance beginnings with the film itself. A liner manufactured from recycled plastic can still perform well if the gauge is controlled properly and the resin blend is consistent, because thin or uneven film is where tears and punctures normally start. For larger bins, particularly in offices and shared spaces, a bag that splits at the rim or leaks at the base creates additional cleaning work and poor presentation. Black film also assists conceal mixed waste and retains a bin looking tidier. A sensible specification saves trouble at the point of use.

Plastic bin liners only work properly when the material matches the job, because a thin compostable film that suits a small kitchen caddy may split if it is dragged across a sharp bin rim or packed with damp waste. Gauge, seal strength and the method the film is folded all affect how the liner behaves in use, and that matters as much as the size printed on the pack. Good stock control also relies on matching the liner to the bin, since an oversise bag wastes material and a tight one is awkward to fit. The proper specification cuts spillages, saves handling time and reduces complaints from the point of use.

Heavy duty bin liners need above thickness on a spec sheet; they need to survive proper waste loads without splitting at the seam or tearing round the rim. A superb liner has the proper gauge, decent puncture resistance and enough stretch to cope with sharp offcuts, damp material and rough handling amid emptying. If the film is also light, one heavy sack of waste can turn into a floor spill and additional clean-up. Choosing the proper liner reduces damage in the bin room, retains assortment routes tidier and avoids the false economy of utilising cost-effective film that fails early.

Light duty bin liners are a superb fit for dry office waste because the film is light enough to avoid wasting material, yet still robust enough for paper, tissues and similar low-risk contents. A thinner gauge also retains the packs tidy and compact, which matters in storerooms where cartons need to sit cleanly on pallets and make the optimal use of shelf space. Problems beginning when the gross waste goes in, since broken plastic trim, wet scraps or an overfilled bin can split a light liner far more easily than a heavier one. Matching the liner to the proper waste stream saves time and avoids messy re-bagging.

Recyclable bin liners only work as a sensible sustainability selection when the material and the waste stream are matched properly. A liner manufactured from the gross polymer blend can still be technically recyclable, yet fail in practice because it behaves badly in use, tears below load, or ends up mixed with film that the recycler cannot sort cleanly. From a packaging point of view, the gauge requirements enough strength for handling and assortment, nevertheless not so much that it wastes resin. Clear labelling and a tidy spec also assist warehouse teams and stop users retain them in the proper waste route, which is where a decent environmental claim beginnings to mean something.

Recycled bin liners can work well as a practical waste-sack selection, nevertheless their performance still relies on what goes into them and how they are handled. A liner manufactured from recovered material may suit light dry waste, mixed office waste, or normal housekeeping, yet a thin gauge will split if sharp offcuts, heavy food waste, or wet contents are forced into it. That makes the contrast between tidy assortment and a trail of spillage across a yard or campsite. Stocking the proper sack for the proper waste stream also avoids false confidence about sustainability, because a green label does not fix poor specification. A sensible selection balances recycled content with tear resistance and seal quality.

Non-Degradable Plastic Bin Liners

Clear plastic bin liners make waste sorting easier because the contents can be seen at a glance, so recycling loads are less likely to be mixed with normal waste. That small visual check matters in busy back-of-house areas where cleaners are moving fast and trolley space is small. A transparent liner also assists when bags are emptied into recycling wheelie bins, because any pollution stands out before it spreads through the waste stream. Reusing the bags where potential reduces unnecessary consumption, nevertheless the liner still has to be robust enough to survive handling and not split in transit. A simple transparent specification often saves more trouble than a labeled-up substitute.

Heavy Duty Bin Liners Sub Categories

Heavy duty bin liners need to match the waste stream and the load, not only the bin size on the label. A 190 litre sack has to cope with awkward shapes, damp contents and sharp edges without splitting at the seams, so gauge and film strength matter far above a simple size chart. Clear sacks assist when waste checks or sorting are needed, while black sacks conceal mixed waste where appearance is less of a concern. Picking the proper format reduces handling damage, less double-bags are needed, and the bin liner does its job without slowing down assortment.

Light duty bin liners work optimal where the waste is mostly paper, wrappers and other dry waste, not broken plastic, glass or awkward offcuts. A thinner gauge is easier to pull above the bin, folds neatly into place and changes fast, which matters when bins are emptied several times a day. Some of the trouble with light liners comes from poor sizing rather than weak material, because a bag that hangs loose around the rim can sink in, split at the top or leave mess behind. A proper fit gives cleaner bin handling and less waste around the container.

Where to buy plastic bags

Plastic bag manufacturers and suppliers include:

Polythene Bags
Polythene Bags is a fantastic website specialising in polythene bags. Design your own custom printed carrier bag or mailing bag, or choose from a massive range of stock polythene bags, from waste sacks to packing bags and mailing bags to carriers.
www.polythene-bags.co.uk

Polythene Bag
Whatever type of polythene bag you are looking for, you'll find them at Polythene Bags. Order online from a fantastic range of price-busting bags and get them delivered to any mainland UK address absolutely free.
www.polythenebags.co

Poly Bags UK
Polybags Bulk Sales provide low-cost bespoke polythene manufacturing for large-volume UK customers. As the sister website of leading manufacturer Polybags, you'll get the same first class levels of service and product quality that you get with with Polybags Ltd.
www.polybagsbulksales.co.uk

Clear Polythene Bags
Buy Polythene Bags provides customers with clear polythene bags, black polythene bags and a massive range of polythene bags and other polythene packaging, with loads of extra detail on polythene manufacturing and size guides to help you choose the right product for you.
www.buypolythenebags.co.uk

Polybags Ireland
Irish VAT-registered customers can get a huge 21% discount off all polythene packaging products at Polybags.ie as they get their VAT refunded. Shop online from a massive range of great value products or call the Polybags team to find out more.
www.polybags.ie

Poly Bags
Specialists in polythene bags and plastic carrier bags, this website offers every type of plain or printed polythene bags along with fantastic biodegradable alternatives - all at fantastic discount prices.
www.polythenebags.eu

Plastic Bags
Buy Plastic Bags provide customers with a one-stop-shop for a huge range of plain or bespoke printed plastic bags, including loads of helpful information to help you find the right plastic bag to meet your specific needs.
www.buyplasticbags.co.uk

Cheap Poly Bags
Discount Polybag offer a single source to meet all of your plastic packaging requirements at the right price for you. This tailor-made website from industry leader Polybags Ltd contains a wealth of information on the vast range of plastic packaging which they stock.
www.discountpolybag.co.uk

Clear Plastic Bags
If you're looking to buy clear plastic bags or coloured poly bags then this is the website for you. With loads of information on a huge variety of plastic bag types, you'll find all the answers to help you choose the right plastic bag for you.
www.buy-plastic-bags.co.uk

Plastic Bag Sales
A very handy resource on plastic carriers and shopping bags, Bargain Plastic Bags is the only website you'll need to find the best plastic bags at bargain prices.
www.bargainplasticbags.co.uk

Plastic Bags Suppliers
Providing customers with a definitive list of discount suppliers of plastic bags and a range of other polythene packaging - from plastic sheeting to resealable bags - this website is a fantastic resource to anyone looking to buy polythene products.
www.discountplasticbags.co.uk

Heavy Duty Plastic Bags
Find out more about a wide range of polythene bags, from shopping bags to heavy duty bags, at this excellent website that specialises in plastic bags.
www.plasticbags2u.com

Cheap Plastic Bags
Cheap Plastic Bags is an excellent website for anyone looking to buy polythene bags at cheap prices. With detailed information on huge variety of plastic bags and details of where to buy them at the best price for you.
www.cheapplasticbags.co.uk

Plastic Bag
Whatever type of plastic bag you are looking for, from clear plastic bags to resealable plastic bags, you'll find out more about it at this helpful website guaranteed to help you choose the right type of bag for your needs.
www.plasticbags2u.co.uk

Plastic Shopping Bags
Looking for shopping bags or any type of plastic bag? Need to find out more information on where to buy them on what types of bags are available? Plastic Bags Supplies is the website for you!
www.plasticbagsupplies.co.uk

Research & Resources

To find out more about plastic bags, how they are manufactured, the huge breadth of polythene bags available and their many and varied uses, please visit:

PlasticBags.uk.com: Directory specialising in plastic bags and other polythene packaging. Browse through a huge selection of plastic bags websites or, if you are a manufacturer, list your products for free.

Goldstork: A free online directory featuring the best hand-picked information on polythene bags, specially selected to cover the full range of plastic bags on the market.

PackagingKnowledge: An online polythene packaging encyclopedia containing a wealth of information on plastic bags and in-depth articles for the packaging industry.

Eco-friendly alternatives to plastic bags

If you're in need of bags to get your job done, but you want to reduce the impact on the environment while doing so, there are plenty of eco-friendly alternatives to regular polythene bags:

Biodegradable carrier bags - Made out of 100% biodegradable or renewable materials such as potato starch, these bags provide all of the strength and convenience you need and expect from a regular carrier bag but, when disposed of in composting conditions, they completely break down, making them more environmentally-friendly.

Biodegradable mailing bags - Send those all-important business mails in an eco-friendly way whilst still looking professional. This range of strong mailing bags all feature a biodegradable leaf logo to show your customers that you care about the environment. They can then dispose of the bag in compost, where it will biodegrade.

Biodegradable clear bags - A range of clear bags that are perfect for displaying products before disposing in compost or landfill, where it will completely biodegrade. Ideal for disposing of organic waste, which can be thrown away with the bag in an eco-friendly manner. Available in a range of sizes, from 4” x 6” to 36” x 48”.

Eco-friendly bin liners - Dispose of your refuse with these environmentally friendly bin liners, waste sacks and compost bags. Ideal for kitchen waste, including food peelings, other compostable food and garden, these bags are completely biodegradable. Put them in your compost heap or bury them in soil and simply wait.

Dog poo bags - For the conscientious dog owner, these eco-friendly bags show that you mean business when clearing up after your dog has done their business. Place your hand inside the bag, pick up the dog poo, turn the bag inside out and tie the bag's two handles together before disposing of in a dog poo bin or compost heap. Made from 100% biodegradable material.

Compost bags - These bags are ideal for the food waste bins or kitchen caddies for collecting and disposing of biodegradable kitchen waste. Place your vegetable and fruit peelings, cores and other similar waste into your kitchen caddy, lined with these bags. Once full, remove, tie at the top and throw in your compost bin where both bag and contents will fully degrade.