This news article was originally written in Spanish. It has been automatically translated for your convenience. Reasonable efforts have been made to provide an accurate translation, however, no automated translation is perfect nor is it intended to replace a human translator. The original article in Spanish can be viewed at Descarga corona y plasma de baja presión para mejorar superficies
This type of surface treatments improve the painted and the accession of polyolefinic materials
Download corona and plasma of low pressure to improve surfaces
Asunción Martínez
Engineering product development and testing of Aiju15/10/2002
Engineering product development and testing of Aiju15/10/2002
The polyolefins are polymeric materials with a high chemical resistance, and a wide range of physical and mechanical properties, so it is a very versatile material for use in various industrial sectors. However, the chemical inertia characteristic of the polyolefins, which in certain applications is an advantage, is a drawback when used in processes where it is needed a reactive surface, as it is the case of processes of decoration (painted) and accession.
They are precisely the problems of the decoration and adhesive Union which limit the use of thermoplastic materials polyolefinic in certain sectors and/or applications.
A way to increase the surface energy (and therefore the accession) of the polyolefin consists of surface treatments of substrates.
Between the various procedures for the realization of surface treatments of polymers that exist, the treatments by downloading Crown and low pressure plasma apply to materials whose Union is difficult, due to its low surface energy.
As a result of this need, one of the lines of research in Aiju carried out in-depth studies aimed to improve the paint and adhesive Union of polyolefins (in particular of EVA and polyethylene elastomeric materials) applied to finished parts, in the small and medium industrypreviously making an optimization of the experimental variables in the laboratory. To do so has two teams of surface treatment using radiation: a team of download Crown laboratory and a team of generation of plasma of low pressure in the treatment of complex geometry parts. Both treatments are also fast, not aggressive to the environment and it can be adapted relatively easily to an industrial production chain.
Through the treatment of surfaces of plastics with these technologies produces a very superficial modification of physical and/or chemical, which leads to an increase in the surface energy of plastics, making its more reactive surface, with what the painting or the deposited adhesive can anchor more easily.
For the quantification of the increase in the surface energy are available in Aiju also a measurement of contact angle equipment, using standard liquids. These measures provide great information on the surface properties of plastics, before and after treatment.
All these investigations had been made in the framework of various projects of the Ministry of science and technology research, and so far has achieved a significant improvement of the accession and painted different polyolefinic materials of different formulations (no additives)(, with inorganic charges), through treatment with download corona and plasma of low pressure. During the investigations have been studied various experimental parameters that influence the effectiveness of treatments and the duration thereof, the time that can be stored samples treated before its decoration or Union is an important factor to consider.
Given the large number of variables to be considered in both treatments as well as materials, types of paint and adhesives formulations, reactor gas, etc., are continued research in this line in order to expand the use of the polyolefins applications until now limited
A way to increase the surface energy (and therefore the accession) of the polyolefin consists of surface treatments of substrates.
Between the various procedures for the realization of surface treatments of polymers that exist, the treatments by downloading Crown and low pressure plasma apply to materials whose Union is difficult, due to its low surface energy.
As a result of this need, one of the lines of research in Aiju carried out in-depth studies aimed to improve the paint and adhesive Union of polyolefins (in particular of EVA and polyethylene elastomeric materials) applied to finished parts, in the small and medium industrypreviously making an optimization of the experimental variables in the laboratory. To do so has two teams of surface treatment using radiation: a team of download Crown laboratory and a team of generation of plasma of low pressure in the treatment of complex geometry parts. Both treatments are also fast, not aggressive to the environment and it can be adapted relatively easily to an industrial production chain.
Through the treatment of surfaces of plastics with these technologies produces a very superficial modification of physical and/or chemical, which leads to an increase in the surface energy of plastics, making its more reactive surface, with what the painting or the deposited adhesive can anchor more easily.
For the quantification of the increase in the surface energy are available in Aiju also a measurement of contact angle equipment, using standard liquids. These measures provide great information on the surface properties of plastics, before and after treatment.
All these investigations had been made in the framework of various projects of the Ministry of science and technology research, and so far has achieved a significant improvement of the accession and painted different polyolefinic materials of different formulations (no additives)(, with inorganic charges), through treatment with download corona and plasma of low pressure. During the investigations have been studied various experimental parameters that influence the effectiveness of treatments and the duration thereof, the time that can be stored samples treated before its decoration or Union is an important factor to consider.
Given the large number of variables to be considered in both treatments as well as materials, types of paint and adhesives formulations, reactor gas, etc., are continued research in this line in order to expand the use of the polyolefins applications until now limited
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AIJU Instituto tecnológico de producto Infantil y ocio
