Sealing & resealing bags

Buy from an extensive range of sealable and resealable bags, including grip seal bags, zip seal bags and self-seal bags.

Sealing and resealing bags are...

• Reusable polythene bags that can be opened and closed
• Designed for multiple use - open and close as many time as you like!
• Bags that can be sealed by a variety of means, including self-seal bags

Self-seal bags are...

• Manufactured with an integral sealing strip, located along the bag opening, to allow for easy opening and closure
• Also known as minigrip bags, mini-grip bags, gripper bags, grippa bags and resealable bags
• Ideal for securing bag contents and avoiding leakage or contamination
• Available in a variety styles to suit a range of uses, from storage bags to carrier bags
• Available in clear polythene with or without labels - to make a note of bag contents and help retrieval
• Available in variety of coloured opaque polythene - e.g. red, green, blue or black - to help with item storage and colour-coded retrieval
• Also available in more specialist polythene, from heavy duty grip seal bags to anti-static grip seal bags
• Sometimes referred to as zip seal bags. However…

Zip seal bags are…

• Manufactured with a metal zip fastener or zip seal, making them…
• A more premium bag than a grip seal bag
• Used for storing important documents, such as art portfolios or school project work
• Ideal for use as a wallet for conference delegates or for exhibition attendees
• Also known as zip bags, ziplite bags or zipper bags

Sealable, resealable and self-sealable - there's more than one way to seal a bag

Sealable bags

Any plastic bag that can be sealed shut can be described as a sealable bag.

The sealing process can be carried out by any means, including a bag tie or clip (e.g. a sandwich bag with a twist tie), an adhesive strip, either external (e.g. sealing any bag with cellotape) or internal (e.g. as with a mailing bag), an internal self-seal strip (e.g. as with a minigrip bag) or by heat sealing with an external sealer (e.g. as with vacuum bags).

So any plastic bag that is designed with a seal can be called a sealable bag. However, not all sealable bags can be called resealable bags.

Resealable bags

Only bags where the seal can be reused can be classified as resealable bags. Some bags, such as mailing bags, feature a single-use seal that can't be reused without tearing open the bag itself and thus rendering it useless. Mailing bags are a very convenient way of sending post - thanks to their integral adhesive seal - but, because their seal is strong enough to keep the mail contents secude until the bag is cut or ripped open by the recipient, then a mailing bag is not a resealable bag, although it is a sealable bag.

Self-seal bags

Not every sealable bag be called a self-seal bag. This monicker is reserved only for bags that can be sealed closed without using any external sealing accessory - including adhesive tape, clips or bag ties - and without the use of a heat sealer to melt the polythene and seal the bag.

The most popular types of resealable bags are grip seal bags. These bags, which are sometimes known as mini-grip bags, gripper bags or grippa bags, feature an integral seal that runs along the top of the bag.

The seal contains a male (single) and female (double) ridge of plastic on opposite sides of the bag opening. When the seal is squeezed gently between thumb and forefinger, the male ridge fits snuggly into the female ridges to close the bag. This seal protects the contents of the bag from moisture, dirt and other external contaminants.

It can be used over and over again, which means the grip seal bag is a sealable bag, a self-seal bag and a resealable bag.

This handy bag is available in a huge range of sizes, made from clear, coloured or black polythene, with or without labels to make handy notes on the bag and with specialist options including antistatic bags - to keep electrical components safe - and specimen bags with accompanying record cards - perfect for hospitals, doctors' surgeries and police stations.

Methods of sealing plastic bags

The most common ways of sealing a polythene bag are by:

Sealing the bag with ties or clips. Fasten any bag shut with a plastic clip or twist shut with a tie. A popular method of sealing food bags for domestic use (e.g. clip a packet of frozen peas shut before placing in freezer, twist a sandwich bag closed for a packed lunch etc.)

Sealing the bag with a built-in adhesive flap. Some bags such as mailing bags are manufactured with a flap opening, where the flap contains a built-in adhesive strip attached along its length. Simply remove the cover from the adhesive and press the flap down to seal.

Sealing the bag with a built-in grip or zip seal. A range of bags are available with an integral strip that seals shut either by squeezing the seal together (grip seal) or pulling closed (zip seal). Very handy for regular use as they can be used over and over, these bags also provide great protection from moisture, dirt etc.

Sealing the bag with a heat sealer. If you really want to seal your bag shut tight this is the method for you. A heat sealer will bond two pieces of plastic when placed together in the sealer and the sealer is closed shut. A one-time seal, this method of sealing bags is popular for vacuum packing food.

Where to buy sealing and resealing bags

Resealable bag manufacturers and suppliers include:

Ziplock Bags
The home of ziplock bags online, this website features everything you need on ziplock, zipper, ziplite, grip seal and all self-seal bags. With a huge range of products at great prices and free delivery within the UK, this is the number one ziplock website out there.
www.ziplockbags.co.uk

Self Seal Bags
Specialists in self-seal bags, this website stocks a huge range of resealable bags from grip seal to mini grip and ziplock to ziplite. Packed with loads of useful information to help you choose the right bag for you, with free delivery to UK addresses.
www.self-seal-bags.co.uk

Plastic Self Seal Bags
Discount Self Seal Bags is the place to go to get resealable plastic bags at discount prices. Also features loads of useful information on self-seal bags, including a handy buying guide to make sure you pick the right sort of resealable bag for you.
www.discountselfsealbags.co.uk

Minigrip Bags
A website loaded with information on minigrip bags - aka grippa bags - and all types of self-sealing bags, with list of the best places to buy them online. Features a useful guide to anti-static self-seal bags, what they are used for and how they work.
www.minigrip-bags.co.uk

Zip Seal Bags
Zip Seal Bags contains loads of great information on zip seal bags and other types of self-seal polythene bags and eco-friendly alternatives. It also features a handy list of online zip seal bag retailers.
www.zipsealbags.co.uk

Antistatic Bags
Antistatic bags is the number one website dedicated to antistatic bags. Containing a wealth of information on antistatic packaging and how it works, along with details of where to buy it at the best possible prices.
www.antistatic-bags.co.uk

Resealable Bags
Resealable-Bags is a division of Polybags Ltd, the UK's number one polythene manufacturer, that specialises in resealable bags. Offering an unrivalled range of resealable bags and other polythene packaging at the best prices online.
www.resealable-bags.co.uk

Research & Resources

For plenty more information on sealing and resealing bags, including the manufacturing process, types of self-seal bags available and their many uses, please visit:

PlasticBags.uk.com: Browse through a huge range of self seal bags websites or, if you are a manufacturer, list your products for free on this online directory specialising in self seal bags and other plastic packaging.

PackagingKnowledge: The UK packaging industry's number one website contains huge amounts of information and in-depth articles on self seal bags.

Goldstork: This free online directory features specially selected information and hand-picked features on a range of self seal bags and resealable bags.

What is static electricity?

Every object in the world - ourselves included - is made of atoms, which are in turn made of protons, neutrons and electrons. While neutrons have no charge, protons are positively charged and electrons are negatively charged.

In normal circumstances, the number of protons and electrons in an atom balance each other out, meaning that atoms have no charge. However, when two items rub together or separate, the electrons contained within these items can move from atom to atom or even from item to item, thus giving the atoms a positive or negative charge.

If the items involved in this situation are made from a material that does not conduct electricity - an insulator - then this charge can not move. The result is static electricity.

How do antistatic self-seal bags work?

If any static electricity comes into contact with an antistatic self-seal bag, rather than pass through the bag and risk damaging the electrical components inside the bag, the electricity passes around the bag and dissipates before it can make contact with the components, thus removing the possibility of damage.

Why people are talking about sealable bags

Specimen Bags and Peel & Seal Strips

Short-dash specimen bags need careful construction because the sealable strip has to stay secure while still allowing the sample to be opened and closed cleanly. A plain plastic bag on its possess is not enough for plenty handling jobs, particularly when paperwork, labels, or smaller components must travel together without getting split up. Multipart forms solve that by keeping the sample and record in one place, which saves sorting time at dispatch and reduces the chance of mix-ups at receipt. The bag material also requirements enough clarity and strength to survive repeated handling without clouding or tearing. That makes the format useful where traceability matters and fast identification is part of the process.

Slider grip bags need tight control on film gauge because the closure only works properly when the material and the track are matched to each other. A film that is also light can stretch, split or pull out of shape amid filling, while a heavier grade may make the bag stiff and slow down packing. The slider itself has to travel smoothly, with enough resistance to lock securely nevertheless not so much that operatours have to force it. That balance affects line speed, pack appearance and the amount of rework sent back for correction.

Ziplite bags rely on stable film behaviour through the forming and filling process, not only on a low gauge listed on the order sheet. A bag that sees efficient can become a nuisance if the web drifts off line, catches on guides or folds unevenly as speed rises. That sort of movement slows packing, creates waste and leaves operatours constantly adjusting settings instead of keeping the line running. polythene suppliers with the proper stiffness assists the bag grasp its shape as it travels, so feeding stays consistent and filling remains tidy. A well-balanced construction is normally better than one that is simply thinner.

Buy the top-rated plastic zipper bags for jewelry products at a big price

Plastic zipper bags can be improved by adding a second function, nevertheless additional properties only work when they still suit the product and the method it is packed. For jewellery, a simple packaging supplierble bag often does a superb job because it retains small items together, cuts down on dust, and lets shop staff open and close the pack without damage. Add also much complexity and the pack can see fussy, slow down packing lines, and make the client wonder what the bag is in reality for. A transparent, tidy bag with a proper seal normally builds more confidence than one loaded with unnecessary extras.

100, 4x6cm All sizes All quantities Reclosable zip Bags

Zip bags are chosen for small, mixed or fast-moving parts because they give a simple packaging supplierble barrier without needing cartons or tape. For retail presentation, kitting or spare components, a transparent bag makes counting easier and retains dirt, moisture and handling dust away from the contents. The reclosable strip also assists when stock is opened, checked and returned to shelves, because the seal can be closed again without damaging the pack. Light-gauge film works well for low-risk items, nevertheless the bag still requirements a decent seal line and the proper size to stop the contents rattling around. A correctly selected zip bag cuts waste and speeds up packing at the same time.

Sovereign 50 x 75mm 100 Pack Self Seal Bags Reviews

Self seal bags in a small 50 x 75mm size make bench packing quicker because the closing action is built into the bag itself, rather than relying on tape, clips or a separate sealing machine. That suits small parts work, where counting, filling and closing have to transport at pace and the packer requirements something that behaves the same method all time. A well-manufactured flap with proper adhesive gives a clean closure without effort, which cuts down on fiddly handling and wasted movement. In practice, that retains the line moving and leaves less loose packs to sort out later.

Details about   Grip Seal Bags 4 x 5.5 inch (100) Recyclable Multi Use

Grip seal bags in a 9 x 13 inch size work well where small products need to stay tidy, visible and easy to handle. The reclosable strip saves time on picking and checking because the same bag can be opened and shut plenty times without replacing it each time a count is taken or a sample is inspected. That assists on packing benches, in stores and at products-in areas where mixed items need separating quickly. The proper value comes from utilising the proper gauge, because a flimsy film twists and splits, while a sound one retains its shape and stays tidy in a box or tray. That makes the bag a practical bit of secondary packing rather than dead space on a shelf.

Gripper bags work properly only when film gauge, inflation and machine timing stay in step, because the grip has to release and transport the product cleanly rather than simply bite harder. If the wall thickness drifts or the film stretches unevenly, the bag can hang on the duct, slow the cycle and beginning causing stalls, low output and unnecessary wear on the line. Seal face condition, resin blend and surface stop can all disturb that balance before anyone sees a transparent fault. Consistent behaviour from one cycle to the next makes the process easier to control and cuts wasted energy.

Grippa bags earn their retain on fast-moving packing benches because they let small parts be opened, filled and closed again without changing the container each time. That makes them useful for kitting, sample sets and loose components that need to stay counted while handling is still underway. The film selection matters only as much as the seal strip, since a soft gauge can feel awkward, curl in the hand and tear on sharp edges, while a heavier film adds cost and takes up more room in storage. A bag that behaves neatly at the bench saves time and reduces the sort of rework that slows a shift.

Keyword Research: People who searched minigrip bags also searched

Minigrip bags work optimal when small items need fast control without additional carton space or loose handling. A sound specification uses a low-gauge polythene suppliers film that still draws evenly through the zipper, because poor film consistency makes the closure wander and puts strain on the side welds. That shows up fast on a busy packing line, particularly where kits, returns or spare parts are handled again and again. Clear film assists staff check contents, counts and labels without opening all bag, so less time is lost and less items acquire misplaced. A well-manufactured bag saves labour and cuts waste, provided the film and seal quality match the job.