Obiettivo A careful research of sizing has led to the possibility of realizing a different way, but equally effective, of giving yarn the necessary workability features. The project proposes to verify the intervention's technical and economical feasibility, through a full scale realization.Results expected :* cut of energy requirements per unit of product* consequent cut of CO2* cut of necessary tensio-active quantities per unit of product* cut in investment costs, production costs and system servicing* cut of water requirements per unit of product* cut of dust in weaving* solve the technical problems linked to the traditional process.To increase yarn's mechanical features the new principles is based on coating the warp's both sides, therefore realizing a protective sheating which will be preserved in weaving phase. The yarn's structure, as it will not have to undergo deep absorption of size chemical substances, will remain unchanged and yarn can keep its own elasticity.The project has achieved its main goals. The economic benefit on a yearly continuous operation (3770 hrs/year) consists in :- a reduction in maintenance and operating costs equivalent to 46.500.000 LIT- an energy saving of 181 TOE/year.ENVIRONMENTAL IMPACTThe impact is mainly related to :- energy saving- reduction of dust in weaving- reduction of water consumption- use of cold chemical products.Yarn preparation is very important for its influence on weaving production. Yarn must be properly treated before its use. Weft and warp go through different kinds of processing in order to achieve proper features for the following process through totally differentiated technologies. This project concerns the process and technologies relative to warp working.Preparing warp for weaving consists of removing the yarn contained in spinning reels or twisting bobbins onto the beam that is to be placed behind the loom. During this step, made of several operations, yarn is given the necessary mechanical features so that it can bear the following operations' stresses and a high efficiency in course of weaving is ensured. Such features determining for warp workability, are given in course of sizing.Present technologies enables to achieve such results by using chemical or natural substances which get properly mixed with water and warmed until they form a viscous mixture called size. This mixture must be brought to the boiling point and kept unrest with a mechanical mixer, finally it is sent into the machine kier and kept in temperature. The yarn winded on the beam enters the sizing machine and gets dipped into the kier containing size, becoming imbued with the substance. Then the yarn passes through two or more squeezer rolls, placed on the kier and exposed to a decisive squeezing before it is sent to the drying room. The drying room is usually made of vapour fed rolls which warm the yarn through contact and enables the water remained to evaporate after squeezing. In considering the problems underlined in a traditional process, the project, starting from the results of the already concluded research, proposes to substitute the concept of yarn protection through absorption of substances in the heat with that of protection through yarn coating. Resistance and workability, which yarn must necessarily have in order to bear the following weaving phase solicitations, according to the new concept will be achieved by realizing a protective sheathing which alone can bear such efforts. Using this principle, and at the same time realizing the new machine expressly projected, makes it possible to solve most problems due to traditional technologies. The possibility of spreading the substance in the cold makes it unnecessary to use cooking and keeping size in temperature, therefore it is possible to eliminate most auxiliary systems and consumptions and costs connected to them. Spreading effect of chemical additives will be realized, at varying and controlled relative speed, by making the plane of warps pass on two rolls which fish the waxing liquid in the kier : the operation must take place below and above the plane made of warps. Between the idle cylinder and the first motorized roll, the plane made of warps leans on the waxing roll with its inferior side later the warp is overtuned and undergoes the treatment on the other side. Programma(i) ENG-THERMIE 1 - Programme (EEC) for the promotion of energy technology in Europe (THERMIE), 1990-1994 Argomento(i) 2.3 - INDUSTRY Invito a presentare proposte Data not available Meccanismo di finanziamento DEM - Demonstration contracts Coordinatore BENNINGER SPA Contributo UE Nessun dato Indirizzo VIA DI CAPALLE 63 50041 Calenzano Italia Mostra sulla mappa Costo totale Nessun dato
