Technology Request

Ref: 05 GB EAST 0DHL

Date: 25/10/2005 16:12:18

Title: Clear compostable bio-plastic film from renewable resources to provide an alternative to low-density polyethylene

Abstract: A leading UK manufacturer supplying products to the packaging and stationery markets requires an innovative compostable bio-plastic film with characteristics similar to low-density polyethylene (LDPE). Suitable films should be produced from renewable resources, be non-toxic, and capable of high-volume manufacture. Compliance with European Standard EN 13432 (compostability) is also preferred. The company seeks partners with suitable technology for joint exploitation or commercial agreement.

Description: Currently available polyolefin-based films are generally considered to be environmentally unfriendly in their origin, manufacture or disposal, yet they are still amongst the most common materials used within the packaging industry. Consumer demand is changing this. The company is looking for suitable films, produced from renewable resources, to use within their conversion operations to manufacture a range of “environmentally friendly” products using raw materials that are not derived from oil-based supply routes. The films will be incorporated into disposable one–use products such as clear document carrier envelopes and clear labels. It is expected that the film will be biodegradable via industrial composting processes (and preferably comply with EN 13432) yet stable until the degradation is initiated within the process. Technical Specifications / Specific technical requirements: The key requirement is for the partner company/organisation to provide a consistent renewable resourced film, in various widths and thicknesses, with mechanical characteristics similar to LDPE whilst in use. Other specific requirements include: - heat-sealable: heat-sealable to itself using conventional “bag-making” equipment, - printable: using water-based ink technology. Surface treatment to a minimum of 42 dynes/cm is required, - clarity: film needs to be clear (not high-clarity). A milky appearance is not acceptable, - robust: the end product will be required to be used under a wide variety of field conditions. Because of this the film must be robust in terms of mechanical stresses, in particular burst strength and resistance to tear propagation, - reliability: the shelf life of the product could be in the order of 2 years. The film must therefore be stable over at least this period of time. It is critical that film degradation does not occur prior to composting, - dimensions: roll widths up to 1525mm are required in thicknesses ranging from 30 up to 100 micron. N.B: For the labeling applications, the film will also need to be die-cuttable.