Volume 4, no 2
Multipurpose Maleic Co-polymers Intended for Environmentally Friendly Hide Processing
Carmen GAIDĂU, Victoria BRĂTULESCU, Lucreţia MIU
ABSTRACT. Polymer use in hide processing has been enlarging in the last years because of the trend of cleaner technology application. Under this work, some maleic co-polymers like as sodium vinyl-acetate maleate and sodium methylmethacrylate maleate were prepared and subjected to tests for their multipurpose action on hides in various process stages. Application of the above polymers in deliming and tannage has resulted in lower ammonium levels in the effluents and higher chromium spending in the baths, respectively.
KEY WORDS: maleic co-polymers, sodium vinyl-acetate maleate, polymers, tannage
Study on the Mould Action onto the Patrimony Bookbinding Leather
Lucreţia MIU, Victoria BRĂTULESCU, Carmen GAIDĂU
ABSTRACT. Because of its specific structure and composition with high protein (collagen, albumins etc.), fat, and inorganic salt content, leather is an excellent medium for the development of various biologic agents like as micro-organisms (bacteria, moulds) insects etc., acting both onto its surface and within its structure. This paper suggests some measures to be taken to prevent the undesirable effects onto the patrimony leather items during their preservation for longer periods of time.
KEY WORDS: protein, collagen, inorganic salt, micro organisms, patrimony leather
Rheological Characterization of Some Environmentally Friendly Chemicals Intended for Leather Finishing
Gheorghe COARĂ, Margareta FLORESCU
ABSTRACT. Although the leather industry has been making environment related progress, it is still a pollution factor, particularly because of the toxic, pollutant chemical auxiliaries being in use. This paper deals with some native and imported environmentally friendly acryl based binders used in leather finishing. Also, apparent viscosity variation as depending on the oncentration, shear rate and flow nature pastes is shown for two pigment pastes: yellow and black.
KEY WORDS: leather industry, pollution factor, pollutant chemical auxiliaries, concentration, pigment pastes
Estimating the HAF Carbon Black and Chalk Action on the Characteristics of Ionic Thermoplastic Elastomers Based on Maleinized Ethylene Propylene Terpolymer Rubber
Daniela ZUGA, Laurenţia ALEXANDRESCU, Daniela BERECHET
ABSTRACT. This paper reveals the results obtained when processing maleinized EPDM elastomers by means of zinc oxide, fillers, plasticizers, antioxidants etc. The laboratory prepared blends were subjected to some tests for physical-mechanical characteristics and the application field has been set up.
KEY WORDS: EPDM, elastomers, zinc oxide, fillers, test, physical-mechanical characteristics
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