- Email: [email protected]
Resins & pigments exhibition
Additivesfor Polymers
November I994
restabilization of plastic have a curative effect on a degraded polymer. (25 refs). Int. Polymer Science & Technology, 1994, 21, (6), T54-57. (Translated from: Plasty a Kaucuk, 1994, (3). 82).
Filled recyclable
the composition must be selected with service allowance for the necessary characteristics of the product. (4 refs). ht. Polymer Science & Technology, 1994, 21, (6). T/91-94.
polyethylene
One of the most accessible and effective methods for modifying polymer waste is to introduce different additives, including antioxidants and light stabilizers, plasticizers, dyes, lubricants and fillers. In view of the increased requirements concerning the quality of plastic products and the emergence of new fields for their application, the range of additives is growing constantly, and their effectiveness is increasing. They must meet the following general requirements: ease of processing, compatibility with polymers and other additives, stability and non-toxicity. The possibility of using fillers for crystalline polymers in quantities of up to 20% without surface dressing of their particles and of up to 50% with dressing, has now been established. The filling limit depends on the degree of degradation of the matrix of recycled polyethylene. General requirements for fillers are a capacity for combining with polymers and being dispersed in them with the formation of a homogenous composition, and stability during storage, processing, and service. When selecting the composition of the composite material, account must be taken of the fact that the properties of the product not only depend on the characteristics of the filler and polymer, but are also largely determined by its size, shape, degree of dispersion, and porosity. The particle shape (from spherical to fibrous) in many ways determines the strength of the composite. A large role is also played by the melt viscosity, the viscosity of the system increasing in the case of filling with more extended particles. The introduction of a filler can affect the combination of final properties of the material. The filler, the method of its introduction, and the method for processing
O1994 Elsevier Science Ltd
ENVIRONMENTAL ISSUES International Association
Cadmium
The UK Cadmium Association, which cadmium manufacturers of represents pigments and PVC stabilizers has joined its US counterpart forming the International Cadmium Association. The Association’s London office has operated the European centre of this new organisation from 1 August. The Cadmium Council of Reston, Virginia, will provide for the US needs. The merger is in response to the increasingly international markets for cadmium-based plastic additives among others and the regulatory threats to them. The new association wants support from processors and it is preparing a dossier detailing technical and cost-related problems associated with replacing cadmium pigments. It is monitoring the effect of this process on UK plastics industry competitiveness. Contact: The International Cadmium Association. Tel: +44-71-499-8425.
CONFERENCES/ EXHIBITIONS Resins & Pigments
Exhibition
This exhibition will be held at the Bella Center, Denmark, 16-17 November 1994. Contact: FMJ International Publications Ltd, Queensway House, 2 Queensway, Redhill, Surrey, RHl 1 QS, UK. Tel: +44- 737768611. 11
November I994
restabilization of plastic have a curative effect on a degraded polymer. (25 refs). Int. Polymer Science & Technology, 1994, 21, (6), T54-57. (Translated from: Plasty a Kaucuk, 1994, (3). 82).
Filled recyclable
the composition must be selected with service allowance for the necessary characteristics of the product. (4 refs). ht. Polymer Science & Technology, 1994, 21, (6). T/91-94.
polyethylene
One of the most accessible and effective methods for modifying polymer waste is to introduce different additives, including antioxidants and light stabilizers, plasticizers, dyes, lubricants and fillers. In view of the increased requirements concerning the quality of plastic products and the emergence of new fields for their application, the range of additives is growing constantly, and their effectiveness is increasing. They must meet the following general requirements: ease of processing, compatibility with polymers and other additives, stability and non-toxicity. The possibility of using fillers for crystalline polymers in quantities of up to 20% without surface dressing of their particles and of up to 50% with dressing, has now been established. The filling limit depends on the degree of degradation of the matrix of recycled polyethylene. General requirements for fillers are a capacity for combining with polymers and being dispersed in them with the formation of a homogenous composition, and stability during storage, processing, and service. When selecting the composition of the composite material, account must be taken of the fact that the properties of the product not only depend on the characteristics of the filler and polymer, but are also largely determined by its size, shape, degree of dispersion, and porosity. The particle shape (from spherical to fibrous) in many ways determines the strength of the composite. A large role is also played by the melt viscosity, the viscosity of the system increasing in the case of filling with more extended particles. The introduction of a filler can affect the combination of final properties of the material. The filler, the method of its introduction, and the method for processing
O1994 Elsevier Science Ltd
ENVIRONMENTAL ISSUES International Association
Cadmium
The UK Cadmium Association, which cadmium manufacturers of represents pigments and PVC stabilizers has joined its US counterpart forming the International Cadmium Association. The Association’s London office has operated the European centre of this new organisation from 1 August. The Cadmium Council of Reston, Virginia, will provide for the US needs. The merger is in response to the increasingly international markets for cadmium-based plastic additives among others and the regulatory threats to them. The new association wants support from processors and it is preparing a dossier detailing technical and cost-related problems associated with replacing cadmium pigments. It is monitoring the effect of this process on UK plastics industry competitiveness. Contact: The International Cadmium Association. Tel: +44-71-499-8425.
CONFERENCES/ EXHIBITIONS Resins & Pigments
Exhibition
This exhibition will be held at the Bella Center, Denmark, 16-17 November 1994. Contact: FMJ International Publications Ltd, Queensway House, 2 Queensway, Redhill, Surrey, RHl 1 QS, UK. Tel: +44- 737768611. 11