Food Grade Bags

Food grade bags

Buy from a range of food grade display bags, including candy sweet bags and film front bags now.

Food grade display bags are high quality, high clarity polypropylene display bags used by food manufacturers and retailers to package their food. They help keep food fresh and protected from human contact, dust and other contaminants, plus they make the food look great. Examples of food grade bags are candy sweet bags, popular with confectioners to make their sweets look pretty, and film front bags, popular by bakers for displaying doughnuts, cakes and pastries.

Display bags

Food grade bags are just one particular type of display bag. Also known as retail bags, display bags are made from polypropylene - a clear film similar in appearance to cellophane but, although less well known, one that it is superior to cellophane in many ways.

Polypropylene vs cellophane

Polypropylene is a plastic-based material, which gives it a higher clarity than cellophane, a paper-based material. This means that products covered in polypropylene look crystal clear, making them even more enticing.

Despite the better display quality, polypropylene is also significantly cheaper than than cellophane, which means that not only can you display your products in a more shiny, sparkly coating, but you can also display more of them in this coating than you could with cellophane as an alternative.

Polypropylene is also stronger than cellophane, meaning it makes better quality, longer-lasting display bags. Cellophane creases more easily than polypropylene, which is not ideal for a material that you are using to show off your products in the best possible light.

Cellophane is often considered to be better for the environment than polypropylene, although this is not necessarily the case. See the section ‘How eco-friendly is cellophane?’ for further info.

Things people say about food bags

Food liners sit at an awkward junction between household habit and waste-system engineering; acquire the specification gross and the all stream becomes messier, heavier and markedly less recoverable. In practice, the useful variants are those designed to contain wet biological fractions without tearing at the caddy lip or sweating through below a few days' dwell timeperformance that depends less on marketing claims than on film gauge, puncture resistance and consistent melt-flow amid conversion. A liner that is also light collapses into the waste mass and hampers decanting at transport; also heavy, and the tare weight starts to distort tonnage data while adding avoidable polymer into a low-margin assortment round. The more sensible come has been to align liner performance with the realities of secondary bagging, bin pollution thresholds and depot handling, while also addressing stop-of-life logic: where a mono-material polythene suppliers format is used, separation and reprocessing remain technically straightforward, whereas compostable buildings only function properly if the downstream treatment route is in reality configured for them. That rather prosaic detail matters above public mailing tends to admit, because clean capture of food waste is not simply a behavioural matterit hinges on leak mitigation, odour control, select-face efficiency in caddy distribution, and the quiet arithmetic of volumetric efficiency once a kerbside consignment reaches bulking stage.

Compostable food bags occupy an awkward nevertheless increasingly well-defined niche in the packing shed: they are not simply a greener stand-in for normal polythene suppliers, nevertheless a material system with its possess handling tolerances, sealing window and stop-of-life logic. In practice, the engineering question turns on balancesufficient film strength and puncture resistance for wet or strange foodstuffs, yet a polymer structure that will smash down below controlled composting conditions rather than linger in the waste stream as pollution. That has consequences proper across the line. Micron-specific gauging must be tight enough to maintain tare weight discipline and pallet stability, particularly where mixed consignments include lightweight dry products alongside denser items like household sundries; seal integrity also matters, because once creep starts at the seam, secondary bagging and write-off rates tend to follow. The better grades are formulated for more predictable melt-flow consistency amid conversion, which facilitates cleaner side-welds and less stoppages on high-throughput kit, while their mono-material profilewhere properly specifiedsimplifies disposal routes compared with laminated alternatives that frustrate sorting. None of this removes the operational friction: compostable films can display narrower tolerance to heat and ambient humidity, and they rarely match the surface slip or abuse resistance of mainstream polythene suppliers. Even so, where stock rotation is disciplined and the waste contractour can in reality process certified compostables, the arithmetic becomes more favourable; material selection beginnings to assist feedstock sustainability, lower residual waste handling, and a more credible circular economy position than the normal token gestures bolted on at the stop of the chain.

In food handling, the issue with plastic bags for food is not the blanket use of polythene suppliers, nevertheless the mismatch between polymer design and thermal duty. A bag converted for ambient storage or secondary bagging may exhibit perfectly acceptable seal strength, dart impact and puncture resistance at room temperature, yet start to soften, distort or shed low-level additives once exposed to the sustained heat associated with cooking meat. That is where specification matters: high-density and low-density polythene suppliers behave differently below load, laminate structures react differently again, and micron-specific gauging only tells part of the story unless it is read alongside melt-flow consistency, sealing-window tolerance and the declared temperature envelope. On the warehouse floor this translates into practical distinctionsbags intended for food stock rotation, part control and select-face efficiency are engineered around line speed, tare weight impact and pallet stability, not oven performance. The safer route is so a mono-material or food-contact-approved format expressly rated for microwave or oven use, because compliance in this sectour is tied not simply to whether the substrate touches food, nevertheless to migration limits, surface integrity and the method the film behaves when fats, steam pressure and protein residues alter the contact conditions. Even from a circular-economy standpoint, the trade-off is more nuanced than it first appears: a lighter-gauge bag may improve volumetric efficiency and reduce transport burden per consignment, nevertheless if it is used outside specification and causes spoilage, leakage or product write-off, the amortised energy case deteriorates rather fast.

Embossed Vacuum Sealer Rolls Vacuum Food Pouches Plastic Food Bags

In the trade, plastic food bags are less a generic consumable than a tightly specified packaging format whose performance is set by polymer architecture, seal behaviour and what happens at the pack bench below sustained throughput. Where vacuum sealer rolls and pre-manufactured food pouches are used interchangeably on paper, the industrial contrast is rather sharper: rollstock enables micron-specific gauging and bag-length control to trim film misuse, while converted pouches bring repeatability in seal geometry and secondary bagging speed. The material itself does much of the heavy liftinghigh-density polythene suppliers chains lend puncture resistance and stiffness, lower-density fractions contribute conformity around strange product, and the balance between the two affects not only oxygen ingress and freezer resilience nevertheless also tare weight impact across a full consignment. That, in turn, feeds into pallet stability and volumetric efficiency, particularly where packed lines must cube out cleanly without trapped air or soft-faced packs slumping in transit. On the circularity side, the discussion has shifted from big recyclability claims to whether a mono-material structure can be maintained without sacrificing melt-flow consistency at conversion or compromising seal integrity after reclaimed content is introduced. On the warehouse floor, those selections are felt immediately: poor slip properties slow select-face efficiency, above-gauged film inflates stockholding volume, and static at the mouth of the bag interferes with clean loading of dry products. The better-engineered formats mitigate those frictions not through gimmickry, nevertheless through disciplined control of surface resistivity, film memory and sealing window.

Kitchen Essentials - Food Bags

Food bags sit in an awkward nevertheless highly practical corner of packaging engineering: expected to cope with high-fat cheese, damp herbs, bakery products and the strange non-food duty without any tolerance for taint, seal failure or needless bulk. That pushes the converter towards a fairly narrow technical briefclean polythene suppliers with proper melt-flow consistency, tightly controlled micron-specific gauging and a film structure that grasps its shape on the select-face without adding avoidable tare weight across a consignment. In use, the proper value is less about novelty than containment discipline: moisture migration is moderated, grease transport is checked, and secondary bagging can often be avoided, which matters when pallet stability and volumetric efficiency are being watched as closely as hygiene. Where the format is kept mono-material, the circular-economy case becomes more credible as well; sorting is simpler, pollution risk drops, and the amortised energy tied up in repeated short-life packaging cycles is better justified than with mixed laminates doing a job that plain food-grade polythene suppliers can already facilitate.

polythene suppliers Food Bags - 305 x 355mm

polythene suppliers food bags in a 305 x 355 mm format sit in that unglamorous nevertheless technically exacting corner of food handling where gauge, seal integrity and line efficiency matter above the list of products shorthand recommends. In practice, the value lies not merely in containment nevertheless in the behaviour of the film below proper packing-house conditions: a well-controlled high-density or low-density polythene suppliers blend will dictate stiffness, tear propagation and slip properties at the select face, while consistent micron tolerances reduce split rates amid secondary bagging and palletised consolidation. That has a direct bearing on tare weight impact and volumetric efficiency, particularly where mixed consignments are being built and unstable loads invite product damage or wasted wrap. There is also the matter of hygiene and stop-of-life handling mono-material building retains the waste stream relatively clean compared with laminated alternatives, and where melt-flow consistency has been properly managed in manufacture, recycled feedstock can be introduced without undermining seal performance or surface stop. In short, the normal food bag is only normal until the warehouse floor exposes all disadvantage in resin selection, conversion discipline and stock handling.

Food liners sit at an awkward junction between hygiene discipline and dispatch tempo: they are nominally a simple consumable, yet on the production floor they must be manufactured up to written specification with the same rigour applied to any primary packaging format. That means gauging film thickness to the appropriate micron band, checking seal behaviour against the product's heat profile, and verifying that the chosen polythene suppliers grade has the necessary flex-crack resistance without introducing excess tare weight into the consignment. Sample make-up is not merely a paperwork exercise; it establishes whether the liner will open cleanly on the pack line, grasp dimensional tolerance in secondary bagging, and maintain surface properties that do not impede select-face efficiency when units transport into marshalling. Temperature control and date verification then become inseparable from material performance a liner that seals adequately in a stable ambient may behave quite differently once exposed to hot-occupy conditions or chilled holding, particularly where melt-flow consistency and seal jaw dwell time are marginal. Once flight canisters and trolleys are sealed and their numbers recorded, pallet stability and stowing order stop being clerical details and become part of product protection, because mis-marshalled stock invites unnecessary handling, abrasion at the seal edge, and compression distortion. There is also the less glamorous waste question: poorly specified mixed-material buildings may mask processing issues in the short term, nevertheless mono-material food-contact liners with controlled resin quality tend to facilitate cleaner recycling streams and lower amortised energy across repeat production runs, provided the line has been set to avoid above-engineered gauge and needless film consumption.

Compostable food bags sit in a rather awkward engineering middle-ground: they must behave like thin-gauge polythene suppliers at the select-face, yet disintegrate predictably once routed into a biological waste stream. That demand pulls the material specification in opposing directions. Higher elongation assists a bag survive wet manufacture, sharp stalks and freezer condensation; also much durability, nevertheless, risks poor fragmentation below controlled composting conditions. The better films so rely on carefully balanced polymer blends, where melt-flow consistency, seal integrity and micron-specific gauging matter as much as the feedstock story. On the warehouse floor the concern is less romantic than normal versus synthetic: rolls have to unwind cleanly, perforations must tear without propagating down the side wall, and packed bags must stack without slumping across the pallet. A material may be compostable in principle, nevertheless if it drives secondary bagging, increases tare weight, or reduces volumetric efficiency in transit, the environmental earn becomes less tidy than the label recommends.

To reduce the use of carryout plastic bags from grocery stores and other shopping outlets, as well as retain them from ending up in the environment. Plastic bags affect the environment in a serious method. They pollute our oceans and kill marine life that mistake plastic bags for food. On land, plastic bags acquire into soil and slowly release toxic chemicals.

Large Plastic Food Bags - manufacturer, factory, supplier from United Kingdom

Plastic food bags machines

Types of display bags

Manufacturers package a wide range of products in high clarity polypropylene display bags. Here are a few of the most popular:

Greeting card bags - probably the most popular form of display bag, greeting card bags bring the design on any card to life. Available in a wide range of sizes to cater for small trading cards to small posters and in either budget or premium range.

Budget bags are 25 micron thickness and include a flap that attaches with an optional sticky tab. Premium bags are thicker at 40 microns and include an integral adhesive strip for easy opening and closing. Both the budget and premium range are made with the same high clarity polypropylene.

Flower sleeves - no gift says ‘I love you’ more than flowers and what better way than to present such a special gift than with special wrapping. High clarity flower sleeves made from crystal-clear polypropylene show off flowers in all their blooming glory.

Available in a range of sizes that cater for a large bouquet or a single stem and everything in between, flower sleeves come in batches for easy storage, retrieval and use on shop, flower store or market stall counters.

Candy sweet bags - if someone is very excited then they are often said to be acting ‘like a kid in sweetshop’ with reference to the giddy feeling that children get when they are surrounded by sweets beautifully packaged in glass jars and high clarity polypropylene bags.

White a crisp white back and glossy film front, candy sweet bags are perfect for presenting any type of hard or soft sweet, from pear drops to flying saucers and rhubarb and custards to marshmallows. Drop the sweets in the bag and tie at the top with a pretty ribbon for the perfect way to present any confectionary.

Header bags - header bags are quality display bags with a crystal-clear polypropylene front that hang on a retailer’s display stand. Each header bag has a punched euroslot hole located at the top of the bag, to slide each bag onto one a display stand rail, from where it hangs.

Header bags are available in the form of minigrip bags for holding small and light items, such as stickers or balloons, or as stronger, reinforced header bags for hanging weightier items such as party packs and gifts.

Where can I buy display bags?

Manufacturers and suppliers of display bags include:

Discount Cellophane Bags
Discountcellophanebags.co.uk is a division of Polybags specialising in cellophane bags and polypropylene products providing first class polypropylene products at competitive prices.
www.discountcellophanebags.co.uk

Discount Greetings Card Bags
Website providing a list of discount suppliers of greeting card bags, cellophane type, polypropylene bags. You will also find information about greeting card bags such as sizes types and materials used to manufacture display bags.
www.discountgreetingscardbags.co.uk

Discount Polypropylene Bags
Discount Polypropylene Bags is dedicated to polypropylene bags. With genuine information that will help you choosing the right polypropylene bags needed for your solution. You will also find discounted polypropylene packaging suppliers.
www.discountpolypropylenebags.co.uk

Card Bags
Great prices and discounts on a big range of card bags available if many different sizes and manufactured from high clarity polypropylene film to ensure maximum visibility for your products.
www.cardbags.com

Card-Bags
Extend the shelf-life of your cards with greeting card bags provided by Card-Bags.co.uk. Available in a wide range of sizes and sold direct from the manufacturers, all at discounted prices with free UK delivery.
www.card-bags.co.uk

Ten things heard in conversations about food bags

In canned-food packing, food liners are not merely a sanitary interleaf; they are a controlled barrier system tuned to the awkward chemistry of salts, fats and mild acidity, where even small tolerance in gauge can alter sealing behaviour and invite product smear at the rim. The better formats tend to rely on high-density polythene suppliers with tightly managed melt-flow consistency, because that gives predictable draw, low pinhole incidence and a surface that releases cleanly amid high-throughput filling, rather than snagging and forcing stoppages at the seamer. That matters on the warehouse floor as much as on the line: a liner stock that nests properly improves select-face efficiency, retains secondary bagging to a minimum and avoids needless tare weight creeping into the consignment. There is also a circular-economy angle that is often handled badly in sales copy nevertheless matters in practicemono-material buildings are simpler to recover where clean waste streams exist, and downgauged films with micron-specific control can reduce resin use without sacrificing pallet stability or compressive performance in transit. The engineering trick is to balance barrier integrity with handling reality; also soft and the liner distorts below stack load, also stiff and it resists forming, sheds static and disrupts packing cadence.

Compostable Food Bags and Biodegradable Paper Bags the only method to proceed

Compostable food bags occupy an awkward nevertheless increasingly workable space between foodservice practicality and stop-of-life accountability; the engineering trouble is not merely to replace normal polythene suppliers, nevertheless to transport proper runnability on bagging lines while maintaining grease resistance, seal integrity and controlled moisture transmission from a fibre-led structure. Where the substrate starts with refined wood pulp, the conversation fast turns to gauge discipline, fibre orientation and the uniformity of any barrier treatmentbecause even small inconsistency across the web shows up on the floor as poor fold memory, erratic opening, or splitting amid secondary bagging. That has a direct bearing on select-face efficiency and consignment preparation: a bag that nests cleanly, grasps its mouth profile and avoids unnecessary tare weight assists higher volumetric efficiency on the pallet and less line stoppages at fulfilment. The circular economy case is only credible when the format remains materially coherent; mono-material, pulp-based buildings with carefully managed wet-strength chemistry are easier to route through composting streams than hybrid laminates, although the trade-off is that compostability necessitates tighter control of storage humidity and stock rotation. In practice, the better specifications are those that reconcile fibre yield, melt-flow consistency in any applied bio-based seal layer, and compost-certifiable breakdown behaviour without creating friction for operatours who still need the bag to behave like a part of industrial packaging rather than a statement of intent.

Best Design for YOUQING 100PCs Reusable Plastic Zipper Bags packaging supplierble Plastic Bags For Food Pills Candy 2019

Plastic bags for food sit at an awkward junction between hygiene legislation, line-speed economics and the increasingly hard arithmetic of recovery; the better operatours treat them not as a commodity afterthought, nevertheless as a finely tuned converting job in which gauge control, seal integrity and resin behaviour directly affect what happens at the select-face and on the pallet. In practice, food-grade polythene suppliers bags are specified around far above mere containment: melt-flow consistency governs film clarity and seal repeatability, while the balance between puncture resistance and flex-crack performance determines whether secondary bagging is required for sharp-edged bakery, confectionery or dry-products applications. Closure format matters as wellresealable profiles can mitigate product dehydration and reduce handling waste, nevertheless only if the zipper track is welded cleanly and the film's surface slip is calibrated so packs open and close without distorting on automated filling equipment. The logistics case is equally blunt. Excessive tare weight drags down volumetric efficiency across a consignment, yet below-engineered film invites split packs, unstable outers and reject stock in products-in. That is why serious buyers tend to favour mono-material buildings with tightly held micron tolerances: they dash cleanly, stack predictably and, where mail-use capture in reality exists, present a more credible route into recyclate streams than mixed laminates whose barrier earns are offset by poor recoverability and wasted amortised energy.

Package Snack and Products in Durable packaging supplierble Plastic Food Bags

packaging supplierble polythene suppliers food bags sit in an awkward nevertheless very practical corner of the packaging trade: simple in appearance, yet heavily tied to daily stock control, hygiene discipline and line-side handling. In foodservice and broader operational settings alike, the proper value is not merely containment nevertheless repeatable portioningsliced fruit, cooked meats, bakery inclusions or dry snack components can be separated into saleable or process-prepared units with tight gauge consistency, low tare weight and very small sacrifice in volumetric efficiency. That matters on the warehouse floor, where pallet stability and select-face efficiency are often compromised by rigid formats carrying more air than product. A well-manufactured packaging supplierble bag, particularly in a mono-material polythene suppliers building with stable melt-flow consistency, reduces the need for secondary bagging and facilitates simpler recovery streams after use, provided pollution is controlled. The engineering detail is where the format stands or drops: poorly specified closure tracks can distort below repeated opening cycles, while inconsistent film thickness tends to create weak corners, seal creep and needless waste. When the substrate is matched properly to the applicationwhether that calls for clarity, puncture resistance or a specific surface slipthe result is a storage medium that works with the reality of modern handling rather than against it.

  26619 Food Bags Suppliers and Exporters

Food bags sit at an awkward junction between hygiene discipline, line efficiency and disposal economics; the competent supplier is not merely shifting stock, nevertheless controlling a set of variables that become painfully visible once the bags reach the packing bench. In food handling, polymer selection and gauge discipline govern far above puncture resistance: high-density and low-density polythene suppliers behave differently below cool-store conditions, seals reply differently to pollution at the jaw, and surface slip has a direct bearing on openability amid fast repetitive filling. That matters on the warehouse floor, where poor melt-flow consistency or erratic micron tolerances translate into misfeeds, secondary bagging and lost select-face efficiency. The stronger operatours in this field tend to understand the logistical arithmetic as well as the resin sciencetare weight affects volumetric efficiency across a consignment, bag geometry influences pallet stability, and oversised formats quietly add dead space that hauliers still charge to transport. There is also the less glamorous matter of stop-of-life handling: mono-material buildings facilitate cleaner recyclate streams, while heavily laminated alternatives may solve one barrier problem only to create a more expensive waste fraction downstream. A credible trade directory in this segment, then, has value not because it amasses names, nevertheless because it exposes which companies can supply food-contact bags with repeatable sealing performance, sensible conversion tolerances and a circular-economy logic that survives contact with factory reality.

CLEAR polythene suppliers FOOD BAGS ON ROLL WITH HANDLE (250 COUNT)

Clear polythene suppliers food bags provided on a roll with an integral handle are a decidedly practical format for high-turnover food environments, where the constraint is rarely the bag alone nevertheless the speed and cleanliness of dispensing at the select-face. The rolled presentation retains pack geometry tight, improves volumetric efficiency in back-of-house stockholding and reduces the nuisance of loose secondary bagging; at the same time, consistent perforation strength has to be balanced against tear propagation, otherwise operatours stop up snatching at the web and distorting the bag mouth. In material terms, the useful distinction lies in the film's gauge control and melt-flow consistency: if the polymer chain distribution is poorly managed, clarity drops, handles neck below load and seal integrity becomes variable below chilled or damp conditions. A well-manufactured mono-material polythene suppliers format mitigates a few of that friction because tare weight stays modest, pallet stability is easier to manage across outer cases and, once contaminated food waste is kept within acceptable limits, recyclability is far more straightforward than with mixed laminates or awkward composite buildings.

WINLON Food Liners

Food liners sit in a rather exacting corner of flexible packaging, where the material brief is tighter than plenty outside the trade think. The film has to present a clean, low-odour barrier whilst still running reliably through high-output converting lines; that pushes processours towards tightly controlled melt-flow consistency, disciplined gauge management at micron level, and resin blends that do not invite gel formation or weak spots in the seal area. On the warehouse floor, the liner's behaviour matters only as much as its food-contact status: slip properties affect select-face efficiency, anti-block performance dictates whether stacks separate cleanly amid packing, and surface resistivity has to be managed carefully where dry product and fast filling can generate nuisance static. There is also the awkward arithmetic of logistics tare weight cannot be allowed to creep upward simply to compensate for poor puncture resistance, because volumetric efficiency, pallet stability and consignment density all suffer when film specification becomes lazy rather than engineered. The sharper operatours have so moved towards mono-material polythene suppliers structures where potential, not as a slogan nevertheless because they facilitate cleaner recovery streams, reduce secondary bagging in transit, and make better use of amortised energy across repeated production runs; in practice, that means food liners designed less as anonymous consumables and more as finely gauged process components with a direct bearing on hygiene assurance, line speed and downstream waste.

Compostable food bags sit at an awkward junction between polymer science and the realities of the caddy liner: they must behave like a thin-gauge polythene suppliers sack in the hand, yet surrender predictably below the heat, moisture and microbial load of a managed composting stream. Starch-led formulations, particularly those drawing on high-amylopectin feedstock, can provide a useful backbone because the branched glucose structure lends tear resistance without recourse to normal plasticisers. The engineering trick is balance. Too stiff a film splits around wet peelings; also soft a film blocks on the reel, stretches at the select-face and collapses below a modest organics load. A certified compostable co-polymer blended with starch gives the converter a wider processing window, provided melt-flow consistency is maintained through extrusion and the micron-specific gauging does not drift into nuisance failure.

Polybags

Chamberlain College of Nursing - CHEM 101 Graded Exam 4 The number of atoms in a body-centered cubic unit cell is Select one: Which of the following properties indicates the presence of robust intermolecular forces in a liquid? Select one: What name is given to the phenomenon where a thin ¦lm of water contracts and adheres to the wall of a glass cylinder? Select one: In a sample of hydrogen iodide, __________________ are the most necessary intermolecular forces. Select one: What is the intermolecular force that exists between a magnesium ion and hydrogen sul¦de? Select one: If liquid bromine is cooled to form a solid, which type of solid does it form? Select one: Which one of the following crystallises in a metallic lattice? Select one: Based on the phase diagram of a pure substance given below, what is the signi¦cance of the point labeled B? Select one: Below is a representation of liquid water in equilibrium with its water vapour in a rigid container at 35ºC. The circles represent water vapour. Which diagram below optimal represents liquid water in equilibrium with its water vapour at 70ºC? The heat of vaporisation of water is 40.7 kJ/mol. (R = 8.314 J/K • mol) Select one: The vapour pressure of ethanol is 400. mmHg at 63.5°C. Its molar heat of vaporisation is 39.3 kJ/mol. What is the vapour pressure of ethanol, in mmHg, at 34.9°C? (R = 8.314 J/K • mol) Select one: Lead crystallises in the face-centered cubic lattice. What is the coordination number for Pb? Select one: Iron crystallises in the body-centered cubic lattice. What is the coordination number for Fe? Select one: The versatile group found in proteins is called a (an) Select one: Which one of these selections is the normal structural formula of an amino acid? Select one: A peptide stick (also called an amide stick) connects two amino acids together. What atoms are linked by this stick? Select one: Which one of these elements is not found in proteins? Select one: What is the name of the condensation copolymer formed from ethylene glycol (a diol—a molecule with two alcohol groups) and para-terephthalic acid (a diacid—a molecule with two carboxy groups)? Select one: Which of the following is a polymer? Select one: Which of the following polymers is used in plastic food bags and wraps? Select one: What name is given to the polymers whose shape is determined as part of the chemical process that formed the polymer? Most high-temperature superconducting materials are Select one: Materials with no resistance to the §ow of electrons are called Which type of polymerisation reaction involves the attaching of monomer molecules with two alternative versatile groups resulting in the elimination of a small molecule, normally water? Which type of polymerisation reaction involves the bonding of monomer molecules by the movement of electrons from a multiple stick into new single sticks between molecules? Select one:

Research & Resources

There is lots more information about display bags available online, including details of the manufacturing process and a list of the wide variety of display bags available. To find out more, please visit:

Plastic Bags
Find a whole host of websites specialising in display bags on this free polythene packaging directory, where businesses can post their own product listings for free.
www.plasticbags.uk.com

Packaging Knowledge
Specialist resource containing in-depth news and information on polythene packaging. Find out facts and read detailed articles on a variety of packaging, including retail display bags.
www.packagingknowledge.com

Goldstork
"Best of the web" directory containing interesting hand-picked information, including useful, off-beat and unusual websites specialising in display bags.
www.goldstork.com

How eco-friendly is cellophane?

Many people believe that cellophane is a more eco-friendly product than polypropylene and, on face value, this conclusion is not an unreasonable one to make.

Cellophane is a paper-based material and it is 100% biodegradable, which suggests that it can only be good for the environment and certainly better than a product which is plastic-based and not therefore not biodegradable.

However, cellophane is not as eco-friendly as it is often believed. The reason for this lies in the process made to make cellophane and the polluting effects of this process.

Cellophane is produced by taking cellulose - a chain of linked sugar molecules - from a natural source such as wood or cotton and dissolving it in alkali and carbon disulfide to make a solution called viscose, which is then reconverted into cellulose and processed in more chemical baths to produce the shiny finished product.

Carbon disulfide

It is the polluting effects of carbon disulfide and other by-products of the process used to make viscose that mean cellophane, although 100% biodegradable, is not 100% eco-friendly.

Although only very high concentrations might harm the environment in the vicinity of its release, carbon disulfide can be involved in the formation of ground level ozone which can cause damage to crops and materials.

Carbon disulphide is also potentially damaging to humans if inhaled, ingested or touched via contaminated objects. It can lead to a range of symptoms from chest pains to liver damage and can affect fertility in both men and women. Inhalation of high levels of carbon disulphide and prolonged exposure can result in damage to the heart or central nervous system and in extreme cases death. However, exposure at regular background levels is unlikely to have any adverse effect on human health (Source: Scottish Environment Protection Agency).