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

Grippa bags earn their place on the packing line because the closure does above retain a pack shut. The interlocking ridge gives a repeatable seal that assists control leakage, odour transport and stray dust, so the bag can be used for small parts, samples or mixed kits without resorting to additional wraps. That makes life easier in warehousing also, since cleaner packs transport more securely through select-face handling and are less likely to be rejected later. When the film is a sound polythene suppliers with even gauge control, it opens and recloses without splitting at the seal edge, which is what retains the bag useful rather than awkward.

Minigrip bags solve the messy handover between one operation and the next, because small cut parts need to stay identified, protected and easy to select without adding additional packing. A transparent low-gauge polythene suppliers bag lets contents be checked at a glance, while the packaging supplierble profile retains the load closed after repeated openings on a bench or in a small production cell. That matters when offcuts, samples and part-cut stock transport through several stages and a simple card inside the bag can transport the count or next operation. If the gauge is also light, sharp edges and overfilled bags soon cause splits, crushed corners or lost parts, so the practical reply is a proper film spec and a closure that still works after plenty of handling.

Mini grip bags work optimal when the film is proper, not when the spec is chased for the lowest potential gauge. At this size, a small wobble in web thickness or seal profile shows up fast on the packing line, because the grip strip has to close cleanly with light finger pressure and retain doing so across the all dash. If the seal area is uneven or the film feels also soft, bags can split, stick together or fail to present properly at the select-face, which leads to slow packing and more handling damage. A sound building retains the bag easy to open, easy to close and proper in transit, so the job transports without constant rework.

Similar to "300 Ultra Pro ONE TOUCH packaging supplierBLE BAGS NEW magnetic screw toploader card sleeve"

packaging supplierble bags work optimal when the film, seal and opening profile are matched to the method stock is in reality handled. A bag that sees fine on the first close can still fail once it is opened and shut several times on a select face, because a weak press-seal track, poor gauge control or also much stiffness can lead to creep at the edge or a split close the grip. Small parts and scuff-prone items need a bag that retains dust out, stays flat in a tray and does not fight the operatour at bagging speed. Get the specification proper and less time is lost checking contents or replacing damaged packs.

Sealable bags are often chosen for holding loose products because they close fast and retain contents together, nevertheless the bag itself only works as well as the method it is used. When a product is concealed in a load, the packaging still has to survive stacking, vibration and rough handling without splitting or giving away its contents. A packaging supplierble format can also be useful when items need to be counted, checked or redistributed in the warehouse, since the closure makes repeated opening easier than a plain bag. Even then, the bag is only a shell, not a safeguard for poor packing or concealment. Good bag specification mainly relies on film strength and a proper seal, and that is what determines whether the contents stay secure.

Specimen Bags Suppliers serving United Kingdom

Specimen bags need to keep safe the contents while also making the handling process apparant and controlled. Low density polyethylene suits this sort of pack because it stays flexible in cool stores and gives enough give for repeated opening and closing without cracking at the welds. A strengthened side-welded zipper assists the bag stay shut through sorting, internal transport and hand transport, while the outer pouch gives a second space for paperwork or laboratory notes without mixing them with the sample. Clear marking matters as well, because the biohazard emblem and tick boxes reduce confusion at the point of use. That makes the bag easier to manage on busy receiving lines where mistakes are costly.

Slider grip bags earn their place because the closure has to work properly all time, not only on the first opening. A superb zip or slider track retains the mouth aligned, so the bag can be opened and closed without tearing the film or leaving the seal partly engaged, which is a normal reason for spillage in handling and transit. The film itself matters as much as the closure: if the gauge is even and the polythene suppliers has enough resilience, the bag retains its shape and resists stress labels around the top edge. That makes stock easier to store, safer to transport, and less likely to fail when part-used packs are returned to a shelf.

Zipper transparent ziplite bags with white top plastic

Ziplite bags earn their retain by protecting small parts without adding much weight or bulk to the consignment. A transparent polythene suppliers body lets packers check counts at a glance, while a sensible film gauge assists retain out dust, grease and the scuffing that happens as trays transport from picking to dispatch. The zip closure matters, nevertheless the proper contrast is in the film itself: a stiffer grade gives a neater stop, while a softer blend sits better around strange shapes and is less likely to split at the corners. That makes the bag easier to handle on the line and less likely to let loose items wander inside a carton.

(XR102) PP Zipper Bags

PP zipper bags give better daily control than plenty plain open-top packs because the seal can be opened and closed without ruining the bag. That matters in packing lines, stock rooms, and at the client side, where contents may be checked, split, or topped up several times before use. Polypropylene also gives a transparent, tidy see and enough stiffness to assist the bag stand up to handling without feeling flimsy. When the gauge is chosen properly, the bag closes neatly, carries light to medium products well, and reduces the sort of spill and pollution problems that come from loose packing. A superb zipper bag saves time and retains contents presentable through storage and dispatch.

WELCOME PACK ZIP BAGS

Zip bags for toiletries need to do above only grasp small items together, so colour selection and pack size both matter. Black, white and taupe give a simple spectrum that suits alternative shopping sees and storage systems, while packs of 10 work well for secondary packing, resale, or controlled issue in a warehouse. A tidy zip closure assists retain contents secure amid handling, and the bag format makes stock easy to count, sort and dispatch. For small special-care items, that combination of tidy presentation and practical protection normally saves time at select-face and reduces unnecessary damage.