Influence of the Secondary Raw Materials on the Mechanical Properties of Multilayer Films

2011 ◽  
Vol 488-489 ◽  
pp. 613-616
Author(s):  
Rimantas Didžiokas ◽  
Jolanta Janutėnienė ◽  
Marius Gintalas ◽  
A. Tadzijevas

Recycling and usage of secondary raw materials in production is one of the most topical issues. Usage of secondary raw materials is one of the most topical issues in both economic and ecological (environmental) sense. Such a layered film on the market has lower price because secondary raw material prices is significant lower compared with the original material, the PET granules. Currently producing a layered film the middle layer composes up to 50 % of recycled material. In today's market in order to maintain a high level of competitiveness usage of 50 % of recycled materials is inadequate, therefore to use more recycled material amount and in such way to reduce product cost further researches are necessary.

2021 ◽  
Vol 325 ◽  
pp. 200-208
Author(s):  
Petr Figala ◽  
Rostislav Drochytka ◽  
Vit Černý

This paper deals with the development of a new mortar, for cement-based inverse grouting, with an increased degree of chemical resistance. The aim of this work is to verify new mixtures optimized by suitable secondary raw materials. The studied parameters include selected physical-mechanical characteristics and chemical resistance of individual raw material variants is characterized by resistance to sulfate solution. The results of this work show that it is possible to increase the chemical resistance by optimizing the grouting mortar mixture with suitable secondary raw materials. The optimized mixture for the new grout will be part of a comprehensive material system for the remediation of sewers or shafts.


2016 ◽  
Vol 11 (2) ◽  
pp. 113
Author(s):  
Heldy Juliana ◽  
Naniek Utami Handayani

Gudang adalah suatu tempat penyimpanan untuk semua barang-barang hasil produksi maupun penjualan. Fungsinya sebagai tempat penyimpanan memiliki peranan yang sangat vital. Oleh sebab itu diperlukan adanya pengaturan yang tepat dan cepat dalam penggunaan ruang gudang. CV.MDP-Semarang merupakan industri kemasan karton yang berlokasi di Semarang. Tingginya tingkat penggunaan gudang di perusahaan ini membuat effisiensi waktu dan ruang menjadi penting. Dari hasil pengamatan, CV. MDP-Semarang belum memiliki tata letak penyimpanan yang baik. Hal ini terlihat dari cara penyimpanan bahan baku di gudang yang belum mengikuti kaidah tata letak gudang. Pada gudang bahan baku, karton diletakkan secara acak sehingga menyulitkan pencarian, kapasitas gudang bahan baku saat ini dikeluhkan tidak mencukupi kebutuhan. Parameter tata letak gudang bahan baku yang baik adalah dipenuhinya ruang secara maksimal dan pemenuhan terhadap permintaan bahan baku yang lebih cepat. Pada penelitian ini, metode class-based storage dan penggunaan rak, memisahkan karton berdasarkan jenis karton di gudang bahan baku mampu memberikan peningkatan kapasitas gudang. Dengan rancangan tata letak gudang bahan baku usulan dapat meningkatkan kapasitas gudang, sehingga mampu memberikan ruang kosong untuk 64.000 pieces karton. AbstractWarehouse is a storage for all the goods of production and sales. Its function as a storage has a very vital role. Therefore it is necessary to have the proper regulations in the use of warehouse space. CV.MDP-Semarang is the carton packaging industry located in Semarang. The high level of the activity in the warehouse make time and space efficiency becomes important. From the observation, CV. MDP-Semarang do not yet have good storage layout. It is shown from raw material inventory in storage that are not following the principle of good storage layout. In the raw materials storage carton are placed randomly, so it makes the operator difficult to find the goods and the storage become out of capacity to fulfill demand. The good parameters for good storage are the optimal utility and the capapbility to fulfill raw material demands faster. In this paper, class-based storage method and shelf are used to separate carton based on type of carton in raw material storage in order to improve storage capacity. By proposes the design raw material storage layout, the company should be able to increase storage capacity, thus, it will be able to give space for 640.000 pieces of carton.


2012 ◽  
Vol 550-553 ◽  
pp. 3253-3257
Author(s):  
Xian Qi Sun ◽  
Chuan Shan Zhao ◽  
Hui Rong Yang

Hand towel is one kind of disposable tissue paper which has characteristic of soaking up water quickly and lower cost. It becomes increasingly popularity in families, at work, and public places. There are many kinds of raw materials to produce hand towel according to its level. Some researches showed that bleached chemical pulp could be partially used to the production of hand towel and some other household paper. In this study, some kinds of raw material which be used to produce hand towel were analyzed and trying to looking for new one. Poplar Extruding Mechanical Pulp (EMP) had characteristics of long fiber, high level of strength and brightness. Different ratio of poplar EMP and certain Bleached Kraft Pulp were tested to make hand towel. The effects of poplar EMP on whiteness, tensile strength, bulkiness, absorbability were discussed. The results showed that characteristic targets of hand towel made from poplar EMP and Bleached Kraft Pulp met the quality requirements of GBT22455-2009 and satisfied the high-end hand towel. The new hand towel had lower cost, higher stiffness and higher bulkiness. It was feasible from the technique and economy point.


2011 ◽  
pp. 465-480
Author(s):  
Selena Vitezovic

Technology studies have always been the most important focus of archaeology, as a science which analyzes human past through the study of material culture. To say that something is technological in archaeology, means to put the concept of technology in the centre of theoretical studies, and to study not only the form of the object, but also the entire sequence of technological factors, from raw material choice, mode of use, up to the reasons for abandonment. The concept of technology in anthropology and archaeology is based on the original meaning of the word ????? in ancient Greek, meaning the skill, i. e., to study how something is being done. Such a concept of technology as a skill or mode of doing something was for the first time outlined by the French anthropologist Marcel Mauss, whose starting point was that every technological statement was at the same time social or cultural statement and that technological choices have social foundations. Pierre Lemonnier further developed the anthropology of technology, focusing on the question of technological choices, as well as numerous other anthropologists. In archaeology, the most important contribution to the study of technology was the work of Andr? Leroi-Gourhan, who created the concept of cha?ne op?ratoire, as an analytical tool for studying the mode of creating, using and discarding an artefact, starting with raw material acquisition, mode of manufacture, final form, use (including caching, breaking and repairing) up to the final discarding. It is not only about reconstructing the algorithmic sequence of operations in creating one object, but it is a complex analysis of operational chain within one society which includes the analysis of technological choices. The analyses of technologies today include a variety of different approaches, most of them with emphasis on the cultural and social aspects of technology. The analysis of bone industry in the Early and Middle Neolithic in central Balkans (Starcevo culture), which included not only final objects, but also manufacture debris and semi-finished products, revealed a well developed industry, with a high level of technological knowledge on the properties of raw materials, skillful manufacture, well organized production, as well as possibility of a certain degree of specialization on the micro and macro level (within one settlement and within a group of settlements). Both raw material choices and manufacturing techniques, as well as the final forms, demonstrated a high standardization level. Also certain symbolic value was attributed to some raw materials, and there is a possibility that skill itself was valued. Further analyses of multiple technologies will help in reconstructing the organization of production, social and economic aspects in Neolithic societies, as well as the role of technology in everyday and ritual life.


Marine Drugs ◽  
2021 ◽  
Vol 19 (9) ◽  
pp. 480
Author(s):  
Girija Gajanan Phadke ◽  
Nikheel Bhojraj Rathod ◽  
Fatih Ozogul ◽  
Krishnamoorthy Elavarasan ◽  
Muthusamy Karthikeyan ◽  
...  

Developing peptide-based drugs are very promising to address many of the lifestyle mediated diseases which are prevalent in a major portion of the global population. As an alternative to synthetic peptide-based drugs, derived peptides from natural sources have gained a greater attention in the last two decades. Aquatic organisms including plants, fish and shellfish are known as a rich reservoir of parent protein molecules which can offer novel sequences of amino acids in peptides, having unique bio-functional properties upon hydrolyzing with proteases from different sources. However, rather than exploiting fish and shellfish stocks which are already under pressure due to overexploitation, the processing discards, regarded as secondary raw material, could be a potential choice for peptide based therapeutic development strategies. In this connection, we have attempted to review the scientific reports in this area of research that deal with some of the well-established bioactive properties, such as antihypertensive, anti-oxidative, anti-coagulative, antibacterial and anticarcinogenic properties, with reference to the type of enzymes, substrate used, degree of particular bio-functionality, mechanism, and wherever possible, the active amino acid sequences in peptides. Many of the studies have been conducted on hydrolysate (crude mixture of peptides) enriched with low molecular bioactive peptides. In vitro and in vivo experiments on the potency of bioactive peptides to modulate the human physiological functions beneficially have demonstrated that these peptides can be used in the prevention and treatment of non-communicable lifestyle mediated diseases. The information synthesized under this review could serve as a point of reference to drive further research on and development of functionally active therapeutic natural peptides. Availability of such scientific information is expected to open up new zones of investigation for adding value to underutilized secondary raw materials, which in turn paves the way for sustainability in fish processing. However, there are significant challenges ahead in exploring the fish waste as a source of bioactive peptides, as it demands more studies on mechanisms and structure–function relationship understanding as well as clearance from regulatory and statutory bodies before reaching the end user in the form of supplement or therapeutics.


Minerals ◽  
2021 ◽  
Vol 11 (9) ◽  
pp. 975
Author(s):  
Slobodan Radusinović ◽  
Argyrios Papadopoulos

Research for critical raw materials is of special interest, due to their increasing demand, opulence of applications and shortage of supply. Bauxites, or bauxite residue after alumina extraction can be sources of critical raw materials (CRMs) due to their content of rare earth elements and other critical elements. Montenegrin bauxites and bauxite residue (red mud) are investigated for their mineralogy and geochemistry. The study of the CRM’s potential of the Montenegrin bauxite residue after the application of Bayer process, is performed for the first time. Montenegrin bauxites, (Jurassic bauxites from the Vojnik-Maganik and Prekornica ore regions from the Early Jurassic, Middle Jurassic-Oxfordian and Late Triassic paleorelief) are promising for their REE’s content (around 1000 ppm of ΣREE’s). More specifically, they are especially enriched in LREEs compared to HREEs. Regarding other CRMs and other elements, Ti, V, Zr, Nb, Sr and Ga could also be promising. In bauxite residue, the contents of Zr, Sr, V, Sc, La, Ce, Y, Ti and Nb are higher than those in bauxites. However, raw bauxites and bauxite residue as a secondary raw material can be considered as possible sources of CRMs.


2018 ◽  
Author(s):  
Sh.V. Gasparyan ◽  
S.A. Maslovskii

Приоритет Стратегии развития пищевой и перерабатывающей промышленности Российской Федерации до 2020 года – обеспечение населения страны безопасным и качественным продовольствием. Сырьевая база овощеперерабатывающей промышленности – основа производства. Как инвесторы, так и государство предпринимают конкретные меры для решения проблем. Вместе с тем, несмотря на динамику улучшения, многие проблемы остаются нерешенными. Темпы роста производства овощного сырья недостаточны для промышленности и сдерживают рост производства из отечественного сырья. Это объясняет высокий уровень импорта.The priority of the Strategy of development of the food and processing industry of the Russian Federation until 2020 is to provide the population with safe and quality food. The raw material base of the vegetable processing industry is the basis of production. Both investors and the state are taking concrete measures to solve the problems. However, despite the momentum for improvement, many challenges remain. The growth rate of vegetable raw materials production is not enough for the industry and hinders the growth of production from domestic raw materials. This explains the high level of imports.


2021 ◽  
Vol 12 (2) ◽  
pp. 341
Author(s):  
Oxana DENISSOVA ◽  
Zhadyra KONURBAYEVA ◽  
Alfiya ZAKIMOVA ◽  
Madina RAKHIMBERDINOVA

Animal husbandry is one of the main sectors of the country's economy, which can demonstrate significant results of import substitution shortly. In article dynamics of such relative indicators characterizing scales of industrial activity in the sphere of animal industries, as a share of the branch in the Kazakhstan economy and volumes of production of animal industries per capita of Kazakhstan is considered. For example, the average annual growth rate of this indicator is compared with countries with a high level of development of this industry. It was found out that the use of secondary raw materials of animal husbandry will promote the development of new industries and import substitution of both raw materials and finished products, which will attract innovative technologies in the agro-industrial complex. The article presents a step-by-step algorithm of research of the import-substituting potential of the industry, as well as its practical testing (by the example of the Republic of Kazakhstan). Volumes of production on branch "animal industries" are defined, connections of import dependence and the agrarian production made abroad are established.


2013 ◽  
Vol 838-841 ◽  
pp. 2338-2341
Author(s):  
Marcela Fridrichová ◽  
Karel Dvořák ◽  
Iveta Hájková

The insufficient occurrence of raw material resources on our territory was one of the historical reasons for marginal production of sulphated binders from secondary raw-material resources. Also the unprofitability of material production based on calcium sulphate was related to this fact. This was changed in the end of the last century when formation of waste raw materials increased with industrial development. Secondary gypsums became basic raw material for production of plaster boards, plaster mixtures and anhydrite self-levelling mixtures. Wet flue gas cleaning desulphation process during which the energogypsum is formed is nowadays realised in major part of our power stations. Annual production of the energogypsum produced in this way in particular power stations is about 250 kt. The energogypsum is generally stored in stock piles as a so called stabilisate and partially is delivered to cement works as a solidification regulator. Chemogypsum is produced in chemical works where waste waters with content of SO42- occur, which must be desulphated with lime in water ambient. Further it is formed in citric acid productions where also sulphated waters occur. Last but no least it is also produced in industrial production of phosphates. Production of titanium dioxide is another example of the industry where the possibility of gypsum formation exists.


Author(s):  
Игорь Владимирович Шостак ◽  
Yashar Rahimi

The issues related to the development of adequate network models of the processes of creating, deploying and supporting the functioning of the full logistics supply chain of dried fruit (SCDF) in Ukraine are considered. It is shown that the creation and operation of the SCDF, compared to other SCM class systems, raises a number of specific problems caused by the complexity of the interaction of raw material suppliers (fresh fruit), manufacturers of final products (drying, packaging), storage terminals, distributors, 3PL and 4PL providers (retailers). These problems are due to the fact that the interaction of participants in business processes in the SCDF generates a lot of material, financial and information flows, as well as flows of services from sources of raw materials to the final consumer. The variety of world regions from which dried fruit is delivered to Ukraine, a wide range of products supplied, yield, currency fluctuations, seasonality are the causes of a high level of uncertainty in the processes of formation and decision-making by the SCDF participants. The urgency of the problem is substantiated, the essence of which is to develop a temporal component in the network model of the SCDF, which adequately reflects in time the logistic processes that take place during the operation of the supply chain. A model of a full SCDF in the form of a two-level nested Petri net (NPN) is considered. At the same time, the network model of SCDF functioning in the form of a NPN includes two types of objects - the central link reflecting the activity of the focusing company on processing raw materials (dried fruits), and a number of subnets that simulate the activity of suppliers of raw materials and distributors of finished products. It is indicated that to predict the consequences of the current (or some predetermined) situation and to respond to inquiries about the future state of elements of the SCDF, a predictive model can be used that explicitly takes into account time dependencies. In this case, requests can be about the time of occurrence of certain events, and the fact that certain circumstances are present at a certain point in time. A method is described for extending the network model of the SCDF to comply with the 'just-in-time' principle when modeling business processes that take place supply chain.


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