Introduction to

environmentally friendly bag

Welcome to Compobag. Compobag is a free website helping you understand compostable bags - what is compobag, how it is made, types of compobag, features of compobag, application of compobag, where to buy and many more...

We believe plastic bags are still great, Their light weight, low cost, and water resistance make them so convenient for carrying groceries, clothing, and other routine purchases that it's hard to imagine life without them. But many of these bags never make it to landfills; instead, they go airborne after they are discarded—getting caught in fences, trees, even the throats of birds, and clogging gutters, sewers, and waterways. Thus, recently it has come under attack by creating a visible litter. To avoid these impacts, the best alternative is to use compostable bags which would return to nature.....

Millions of people have bags under their eyes every day. When they buy a bottle of wine, a pie, just about anything small it comes in a bag. So when you advertise on a compostable bag you're running a point-of-sale, counter top, kitchen table and in-street advertising campaign of being environmentally friendly.

Who would have thought that we would one day fertilize our vegetable gardens with plastic bag-enriched soil?

compost bags ~ polythene bags ~

What is a Compobag?

bag for a better world

“Compobags are desinged to be biodegrade by biological processes during composting to yield carbon dioxide (CO2), water, inorganic compounds and biomass leaving no visible, distinguishable or toxic residue behind."”

eco friendly bag ~ bio bags ~

How it is made?

starch and additive based

There are two main methods for making normal polythene into a compostable bag or film:

  1. Starch based or biobased (hydrodegradable)
  2. It is made from corn (maize), potatoes, wheat. This form of compostable films meets the ASTM standard (American Standard for Testing Materials) and European norm EN13432 for compostability as it degrades at least 60% within 180 days or less.

    Examples of polymers with which starch is commonly used:

    • Polycaprolactone (PCL)
    • Polyvinyl alcohol (PVA)
    • Polylactic acid (PLA)

    Click here to understand the life cycle of starch based polymers

    These materials predominantly require a controlled microbial environment such as an industrial compost facility before they will degrade. The heat, moisture and aeration one gets in a compost pile are vital to this type of compostable film working well.

  3. Additive based (oxodegradable/photodegradable)
  4. These films are made by blending an additive to provide a UV / oxidative and/or biological mechanism to degrade them. This typically takes 6 months to 2 years in a landfill site and/or standard composting system. In these films, biodegradation(including compostability) is a two stage process; first the plastic is converted by reaction with oxygen (light, heat and/or stress) to molecular fragments that water can wet, and then these smaller oxidized molecules are biodegraded, i.e. converted into carbon dioxide, water and biomass by microorganisms.

    degradable bag life cycle

composting bags ~ starch bags ~

Applications of Compobag

uses of compobag

  • Carrier Bags
  • Light & Heavy duty bags or film
  • Dog poo bags
  • Garden & Kitchen waste bags
  • Agricultural & Mulch Film

compostable packaging ~ compostable bin bags ~

Pros & Cons of different types of Compobags

consider before you buy

  • Pros & cons of starch based film/bag
    1. Pros
      • Meets European standards EN13432 for compostability
      • Litter is degradable and compostable
      • Reduced fossil fuel content (depending on loading of filler)
      • Faster degradation of litter
      • No net increase of carbon dioxide into global ecosystem
    2. Cons
      • Source of starch can be problematic (competition against food use, rainforests being cleared to grow crops for bioplastics)
      • Poorer mechanical strength than additive based example – filling a starch bag with wet leaves and placing curbside can result in the bottom falling out when a hauler picks it up.
      • Degradation in a sealed landfill is very slow.
      • Limited Shelf life
      • Can only be composted in a special composting facility.
      • If mixed with other plastics for recycling, the value of recycling is reduced.

  • Pros & cons of additive based film/bag
    1. Pros
      • Typically cheaper than starch-based plastics
      • Controlled degradation of litter (with benefits to wildlife, eg birds)
      • These films look, act and perform just like their non-degradable counterparts, except that they break down after being discarded.
    2. Cons
      • Made using fossil fuel
      • Degradation in a sealed landfill is very slow.
      • Degradation depends on conditions of heat, light, stress, air etc
      • They do not comply with European Norms on compostable products
      • If mixed with other plastics for recycling, the value of recycling is reduced.

biodegradable bags ~ compostable plastic bags ~

7 R's of Principals of Eco Friendly Packaging

green packaging

  1. Remove Packaging

  2. Reduce Packaging

  3. Reuse Packaging

  4. Renew (able)

  5. Recycle (able)

  6. Revenue (economic benefits- goal is savings or cost neutral)

  7. Read (education)

compo bags ~ compobag ~

Today Liner approach vs. Ultimate Sustainable Life Cycle Approach

reduce, reuse, recylce

compostable bag ~ biodegradable compost bags ~

What is Packaging Made from Renewable Crops?

Packaging made from renewable resources are grown from crops that have quick growth lifespans.
For example, sugar cane and corn crops have less than I year growth lifespan.

Q: What is packaging made from Sugar Cane?
Sugar Cane is grown to extract sugar from its stalk. After the juice is extracted, the remaining sugar cane fiber pulp is called Bagasse. Up until recently, Bagasse was treated as a waste product, and was often burned thereby causing air pollution. Producing packaging out of the sugar cane pulp solves the problem of waste. In addition it creates a value added product from a material that was once treated as a waste product
Q. How is packaging from Corn Manufactured?
The transformation of corn into plastic is a highly complex process. The corn is broken down into lactic acid, which mico organisms then convert into plastic. Once the crop has been harvested, the field is planted again - so PLA is produced from a naturally renewable annual resource.
Q: What are the benefits of using packaging made from Sugar Cane?
Sugar Cane packaging is 100% compostable and it biodegrades in 30-90 days. Through the use of this product, you are contributing to a sustainable planet. Bagasse is a tree-free readily renewable resource and provides a superior alternative to petroleum derived products. It will biodegrade and will not stay in the environment for hundreds of years.
Q. What are the benefits of using packaging made from Corn?
PLA produced from corn is 100% biocompostable. It is produced from an annually renewable resource. When composted, it will biodegrade and will not fill landfills.
Q: How long does packaging from Sugar Cane take to biocompost?
The rate of decomposition depends on the composting conditions – the temperature, turnover rate, moisture etc. Just like other compostable material, products will biodegrade much faster, if they are broken into smaller pieces. Packaging from Sugar Cane will biodegrade at the same rate as garden waste in a home composting system, which depending on the home composting system can be approximately 30 and 90 days.
Q: How long does packaging from Corn take to biocompost?
The rate of decomposition depends on the composting conditions – the temperature, turnover rate, moisture etc. Just like other compostable material, products will biodegrade much faster, if they are broken into smaller pieces. Packaging from Sugar Cane will biodegrade at the same rate as garden waste in a home composting system, which depending on the home composting system can be approximately 30 and 90 days.
Q: How well does Sugar Cane packaging handle heat, microwave and freezer?
Sugar Cane Packaging will handle hot food and beverages up to 350 degrees Fahrenheit. It is also microwave safe and freezer safe.
Q: How well does Corn packaging handle heat, microwave and freezer?
PLA can be used for all food products between 32°F and 100°F. It cannot be used in the freezer or in high heat conditions.
Q: Where is Sugar Cane packaging manufactured?
The packaging is made in China.
Q. Where is PLA from Corn manufactured?
The resin is produced in Nebraska.

compostable liners ~ compost sacks ~

Buy Compobag or Compostable bags

low prices on compobag

Search results...Found 1 UK Company

  • Compost Bag - Biodegradable Compost Bags
    COMPOBAG or POLYBIO Bags. New Biodegradable composting bag. For disposing of kitchen waste. It's hygenic, easy and eco-friendly. Buy Online & Save money Tody....

PLA bags ~ compostable carrier bags ~

Quality compost starts in the kitchen…

a sustainable solution

If you want “fresh” food waste for your backyard compost and an odor-free kitchen, try using our BioBag 3 gallon waste bags with our ventilated Max Air food waste bucket.

Kitchen food waste can build up bacterial odor quickly when collected in a solid plastic or ceramic pail. The reason is food waste creates heat and moisture that can not escape when placed in these closed containers. Many modern collection pails contain charcoal filters or other devices to help mask the odor, but do little to slow the “rotting process”.

The Max Air buckets are ventilated on all sides, including the top and bottom. The Max Air buckets are attractive for countertop placement and are also hinged if you wish to hang the bucket inside the door of your kitchen sink.

BioBags breathe naturally, allowing heat and moisture to escape or evaporate. This process allows food waste to dry, thus reducing the rate of bacterial build-up which causes odor. When BioBags are used with the Max Air, the consumer has the ultimate system for food waste collection.

Look at these test results of food collected in a solid plastic or ceramic container versus food waste collected in a Max Air using BioBags:

Picture 1.

Food waste after 4 days in ventilated Max Air with BioBag.

Picture 2.

Food waste after 7 days in ventilated Max Air with BioBag.

Picture 3.

Food waste after 4 days in closed container.

Picture 4.

Food waste after 7 days in closed container.

compostable waste bags ~ ecofriendly bags ~

Compostable standards



Today, the terms biodegradation, biodegradable materials, compostability, etc. are very common, but frequently misused, and are, consequently, a source of misunderstanding. The European norm EN 13432 "Requirements for packaging recoverable through composting and biodegradation - Testing scheme and evaluation criteria for the final acceptance of packaging", which has also been recently adopted in Italy, as EN 13432, resolves this problem by defining the characteristics that a material must have in order to be defined as "compostable". This norm is a reference point for material manufacturers, public authorities, composters and consumers.

According to EN 13432, a compostable material must have the following characteristics:

  • Biodegradability, which is determined by measuring the actual metabolic conversion of the compostable material into carbon dioxide. This property is quantitatively measured using the standard test method, EN 14046 (which is also published as ISO 14855: biodegradability under controlled composting conditions). The acceptance level is 90%, which must be reached in less than 6 months.
  • Disintegrability, that is, the fragmentation and loss of visibility in the final compost (absence of visual contamination). This is measured with a composting test (EN 14045). The test material is degraded, together with organic waste, for 3 months. After this time, the compost is sieved with a 2 mm sieve. The residues of test material with dimensions higher than 2 mm are considered as not having disintegrated. This fraction must be less than 10% of the initial mass.
  • Absence of negative effects on the composting process. This is checked with a composting test.
  • Low levels of heavy metals (below the predefined maximum values), and absence of negative effects on the quality of the compost (e.g. reduction of the agronomic value and presence of eco-toxicological effects on the growth of plants). A plant growth test (OECD test 208, modified) is carried out on compost samples where the degradation of the test material has taken place. There must be no difference from a control compost. Other chemical-physical parameters that must not be different from those of the control compost after the degradation are the pH, salinity, volatile solids, N, P, Mg, K.

Each of these points is necessary for the definition of compostability, but these alone are not sufficient. For example, a biodegradable material is not necessarily compostable because it must also break up during one composting cycle. On the other hand, a material that breaks up, over one composting cycle, into microscopic pieces that are not totally biodegradable, is not compostable.

The EN 13432 norm is a harmonised norm, that is, it has been published in the Official Gazette of the European Community, and, consequently, must be adopted by every European country. The norm provides an assumption that packaging and waste from packaging conform with the European Directive 94/62 EC.

ASTM 6400


The biodegradability of the material is compared to a control (pure cellulose) and must biodegrade to a minimum of 90% of the control level.

Constituents of the packaging material >1% by weight must be measured individually, and also biodegrade to a minimum of 90% of the control level.

Constituents <1% by weight are exempted, but the sum of such constituents must not compromise biodegradation. Pilot composting & plant-growing tests are also carried out on the material.

Heavy metal tests are also required. Composting Norm for BIODEGRADABLE PLASTICS

cornstarch bags ~ bio degradable bags ~


Euro compostables code faces scrutiny

The Composting Association is investigating whether the current European compostable packaging standard is appropriate for packaging that ends up on domestic compost heaps, or needs to be revised.

The review of the EN13432 standard comes as UK supermarkets such as Sainsbury’s and Morrisons switch to compostable packaging to cut packaging waste.

Emily Nicholls, technical manager at the Composting Association, said: “It is important that this kind of packaging biodegrades adequately in home composting heaps as well as under industrial-scale composting conditions.”

Home composting heaps tend to be significantly lower in temperature than industrial scale batches and this affects the rate of biodegradation.

EN 13432 is said to be more suitable for industrial composting because it requires biodegradation testing at a temperature of 58°C, within a tolerance of +/- 2°C.

The Composting Association will lead the review with input from the Waste and Resources Action Programme (WRAP) and members of the UK Compostable Packaging Group, which is administered by the National Non-Food Crops Centre.

“We anticipate this will include specialists in compostable packaging design and testing as well as composting,” said Nicholls.

To avoid confusion and to help customers easily see which packaging is suitable for home composting, a ‘home compostable’ logo is likely to be developed.

European Bioplastics owns the existing ‘compostable’ seedling logo and it is seriously considering whether to create a modified version for home-compostable packaging and plastics.

It is expected that a new logo would include the seedling and other design elements that make it easy to distinguish from the existing ‘compostable’ seedling logo.

environmental bags ~ compost bag ~