scholarly journals Study of the Rheological Properties of PVC Composites Plasticized with Butoxyethyl Adipates

2021 ◽  
Vol 5 (4) ◽  
pp. 85
Author(s):  
Irina N. Vikhareva ◽  
Guliya K. Aminova ◽  
Aliya K. Mazitova
Keyword(s):  
Polyvinyl Chloride ◽  
Flow Characteristics ◽  
Polymeric Materials ◽  
Environmental Safety ◽  
Dioctyl Phthalate ◽  
Modern World ◽  
High Quality ◽  
Quality Of Products ◽  
Pvc Compositions

Polyvinyl chloride compositions are widely used to obtain various types of products. In the composition of the PVC composite, one of the main ingredients is a plasticizer, the introduction of which makes it possible to vary the characteristics of the obtained polymeric materials and products and significantly expand the range of their application. Manufacturability in the processing of polyvinyl chloride compositions serves as an important criterion for the suitability and economic efficiency of the developed plasticizer. In the modern world, the high quality of products is directly related to their environmental safety. In this regard, the work describes the production of environmentally friendly plasticizers based on adipic acid and ethoxylated butanol. Their physicochemical indicators have been investigated. The effect of the obtained additives on the rheology of PVC composites has been studied. The values of the flow characteristics of the melts of the developed PVC compositions plasticized with butyl butoxyethyl adipate and decyl butoxyethyl adipate were estimated. It was shown that the fluidity of melts, in comparison with compounds of a similar composition containing industrial dioctyl phthalate, is characterized by even slightly higher values.

TECHNOLOGICAL ASPECTS OF HIGH QUALITY RAW MATERIAL OBTAINING FOR PECTIN PRODUCTION

1970 ◽  
pp. 47-50
Author(s):  
I. A. Ilina ◽  
I. A. Machneva ◽  
E. S. Bakun
Keyword(s):  
Raw Materials ◽  
Thermal Characteristics ◽  
Environmental Safety ◽  
Raw Material ◽  
High Quality ◽  
Temperature Conductivity ◽  
Drying Temperature ◽  
Plant Raw Materials ◽  
Gel Forming Ability

  The article is devoted to the study of the chemical composition, physical and thermal-pfysical characteristics of damp apple pomaces and the identifying patterns of influence of drying temperature the functional composition and gel-forming ability of pectin. The research is aimed at obtaining initial data for the subsequent calculation of the main technological, hydro-mechanical, thermal, structural and economic characteristics of devices for drying the plant raw materials, ensuring the environmental safety and high quality of pectin-containing raw materials, the reducing heat and energy costs. As a result of the study of the thermal characteristics of apple pomaces, the critical points (temperature conductivity – 16.5 x 10-8 m2/s, thermal conductivity – 0.28 W/m K, heat capacity – 1627 j/(kg K)) at a humidity of 56 % are determined, which characterizing the transition from the extraction of weakly bound moisture to the extraction of moisture with strong bonds (colloidal, adsorption). It was found that the pomaces obtained from apples of late ripening have a higher content of solids (21-23 %), soluble pectin and protopectin (2.5-4.5 %). Dried pomaces obtained from apple varieties of late ripening contain up to 25 % pectin, which allow us to recommend them as a source of raw materials for the production of pectin. The optimum modes of preliminary washing of raw materials are offered, allowing to the remove the ballast substances as much as possible. It is established that when the drying temperature increases, the destructive processes are catalyzed: the strength of the pectin jelly and the uronide component and the degree of pectin esterification are reduced. The optimum drying temperature of damp apple pomaces is 80 0C, at which the quality of pectin extracted from the dried raw materials is maintained as much as possible. It is shown that the most effective for the pectin production is a fraction with a particle size of 3-5 mm, which allow us to extract up to 71 % of pectin from raw materials.

scholarly journals Quality characteristics of spatial furniture

2009 ◽  
pp. 135-145 ◽  
Author(s):  
Dusan Skakic ◽  
Igor Dzincic
Keyword(s):  
Quality Control ◽  
Quality Characteristics ◽  
High Quality ◽  
Production Economy ◽  
Production Practice ◽  
Basic Quality ◽  
Quality Of Products ◽  
Quality Production

The quality of products represents one of the key aims of any modern organized production. In the production practice, it is essential to establish the optimal relationship between quality, production economy and delivery deadlines. Furniture quality is evaluated by three levels and they are: basic quality, high quality and especially high quality. The results presented in this paper are based on the sample measurements of chairs and tables during 2007 and 2008 at the Institute for Furniture Quality Control.

scholarly journals Directions for Improving the Quality of Products of PJSC «Beer and Non-Alcoholic Plant «Radomyshl»

2020 ◽  
Vol 10 (513) ◽  
pp. 197-203
Author(s):  
O. I. Garafonova ◽  
◽  
I. F. Nechai ◽  
Keyword(s):  
Product Quality ◽  
Product Life Cycle ◽  
Quality Parameters ◽  
Quality Level ◽  
Business Organization ◽  
High Quality ◽  
The World ◽  
Developing Directions ◽  
Quality Of Products

In the world, product quality has long been one of the major instruments for ensuring the economic development of companies. Achieving high quality parameters, in turn, is an important part of the economic strategy of any success-oriented business organization. The article is aimed at developing directions for improving products of PJSC «Beer and Non-Alcoholic Plant «Radomyshl». The object of the research is the quality of beer produced by PJSC «Beer and Non-Alcoholic Plant «Radomyshl». The assessment of the quality level of the selected product in accordance with the requirements of DSTU 3888:2015 was carried out using the following groups of indicators: microbiological, organoleptic and physic-chemical. The process of assessing the product quality parameters is presented, which consists of seven consecutive stages and is carried out throughout the product life cycle. The factors under the influence of which the quality of products are formed and which may cause deviation from the specified quality parameters are analyzed and structured. The defects that appear due to these factors have been identified. The basis for improving the quality of products is primarily a thorough study of changes in demand for the business organization products. Three groups of measures are singled out, with the help of which one can achieve the desired level of product quality, namely: technological, organizational and socio-economic. A complex of priority measures to improve the quality of products of PJSC «Beer and Non-Alcoholic Plant «Radomyshl» is proposed. The element of scientific novelty is the development of an algorithm for the implementation of measures to improve the quality of products. During the implementation of measures to improve the quality, it is necessary to carry out systematic monitoring and generate reports on the implementation of the project in order to make possible an adjustment of the final result.

MODERN TECHNOLOGIES OF PRELIMINARY WATER PURIFICATION AT RAISED TECHNOGENIC LOADS OF THE WATER SOURCE

2013 ◽  
Vol 3 (4S) ◽  
pp. 93-95
Author(s):  
Anna E USYNINA ◽  
Ludmila V BORONINA
Keyword(s):  
Drinking Water ◽  
Water Purification ◽  
New Technologies ◽  
Water Source ◽  
Modern World ◽  
High Quality ◽  
Technogenic Loads ◽  
Treatment Facilities ◽  
Modern Technologies

In the modern world indisputable value for the population is represented by qualitative water. The extremely unsatisfactory quality of drinking water is caused by limited opportunities of work of treatment facilities in the conditions of anthropogenous loads of water sources. Search of new technologies of high-quality prewater purifi cation it is extremely necessary.

The Effect of the Material and the Geometric Shape of the Waveguides on the Process of Ultrasonic Welding of Plastics

2019 ◽  
pp. 25-32
Author(s):  
S.S. Volkov ◽  
V.M. Nerovnyy ◽  
G.A. Bigus
Keyword(s):  
Welding Process ◽  
Polymeric Materials ◽  
Ultrasonic Welding ◽  
Wave Resistance ◽  
Tool Geometry ◽  
Acoustic Characteristics ◽  
Oscillatory Systems ◽  
Materials Used ◽  
Quality Of Products

This article briefly describes basic elements of machines for ultrasonic welding of plastics and the main materials used for manufacturing elements of ultrasonic waveguide oscillatory systems. A relationship between the amplitude of fluctuations of the welded material and a ratio of wave resistance of the product material and the waveguide tool geometry is examined. It is shown that when welding plastic products of a large thickness, it is practical to use waveguides made from aluminum alloys with a working end face with a diameter of 15 mm. It is established that the closer the acoustic characteristics of the waveguide material and the plastic are, the fuller the transfer of ultrasonic energy is when transiting through the interface of the welded polymeric materials. To assess the distribution of amplitudes of fluctuations in the welded material it is more convenient to use a transmission ratio, which decreases with a decrease in the wave resistance. It is established that the sizes of the working end face of the waveguide are most often defined by the properties, dimensions and geometry of the welded product. The application of the developed recommendations to the choice of material and sizes of the working end face of the waveguide can increase technological reliability of the ultrasonic welding process and improve quality of products.

scholarly journals Kaizen as a Method of Management Improvement in Small Production Companies

2015 ◽  
Vol 16 (2) ◽  
pp. 157-170 ◽  
Author(s):  
Barbara Kamińska
Keyword(s):  
Quality Management ◽  
Small Firms ◽  
Point Of View ◽  
Inexpensive Method ◽  
High Quality ◽  
High Position ◽  
Small Production ◽  
Quality Of Products ◽  
Management Improvement

Abstract„Quality is not everything but everything is nothing without quality”. The famous quotation from K. Ishikawa brings to our attention the fact that nowadays quality is one of strategic concepts from the point of view of functioning of companies, especially production-oriented ones. The lack of quality often eliminates a product from the basket of potential further choices. That means that quality is a prerequisite in the contemporary, highly competitive and saturated market. In order to ensure quality, enterprises introduce various concepts and methods to support quality management. They include, among others, the kaizen philosophy, which allows to minimize unnecessary actions (losses). It is especially recommended to small firms as an inexpensive method assuring high quality of products because they are constantly improved, which, in turn, guarantees maintaining a high position among competitors. This article aims to introduce the concept of kaizen by describing how it works and considering whether it can be successful in Polish companies.

Research and Development of High-Quality Mechanical Engineering Products

2013 ◽  
Vol 329 ◽  
pp. 503-506
Author(s):  
Zhe Wen ◽  
Qian Dong
Keyword(s):  
Research And Development ◽  
Market Research ◽  
Decisive Role ◽  
Structure Design ◽  
High Tech ◽  
High Quality ◽  
Core Components ◽  
Software And Hardware ◽  
Quality Of Products

Computer is high-tech equipment in the age of information, and has been widely applied in all industries by relying on its sharing, universality, intelligence and other characteristics. Seen from the structural composition, software and hardware are two core components of computer, and play a decisive role in the quality of computer and its system in the actual work. Software development is a process for building up software system or software of system according to the needs of users; in high-quality software research and development, multiple aspects such as market research, demand analysis, structure design and model debugging are involved, and the quality of products can be ensured only if each operation link is strictly controlled.

scholarly journals Integrated Quality-Based Production-Distribution Planning in Two-Echelon Supply Chains

2021 ◽  
Vol 2021 ◽  
pp. 1-10
Author(s):  
Husein Pasha ◽  
Isa Nakhai Kamalabadi ◽  
Alireza Eydi
Keyword(s):  
Mixed Integer ◽  
High Quality ◽  
Swarm Optimization ◽  
Integrated Production ◽  
Quality Degradation ◽  
Production Distribution ◽  
Quality Of Products ◽  
Over Time

The integrated production-distribution (P-D) planning has turned into one of the most essential areas in supply chain (SC) management in recent years, especially in the case of perishable products in which the quality of products can change over time. Nonetheless, so far, the suggested models have focused on the P-D stages of the chain while the delivery of high-quality products to customers is of paramount significance in the perishable SC. In the present paper, a multiobjective, mixed-integer, and nonlinear programming (MOMINLP) mathematical model was developed for integrated P-D deteriorating items in a two-echelon SC that emphasizes quality degradation. Quality is monitored and calculated as a function of temperature and time throughout the SC, and the main purpose of the model is to first increase the quality of products delivered to customers and, second, minimize the SC costs. To optimize the problem, the particle swarm optimization (PSO) approach was also incorporated into the model. The obtained model was applied to a case study in Protein Gostar Sina Company in Iran, which resulted in decreased P-D costs as well as increased customer satisfaction.

scholarly journals Comparison of approval procedures for medical devices in Europe and the USA

2019 ◽  
Vol 5 (1) ◽  
pp. 605-608
Author(s):  
Marcel Vila Wagner ◽  
Thomas Schanze
Keyword(s):  
Life Expectancy ◽  
Medical Devices ◽  
Technical Equipment ◽  
The European Union ◽  
High Quality ◽  
Us Government ◽  
The Usa ◽  
Quality Of Products ◽  
Global Harmonization

AbstractImportant achievements such as the discovery of penicillin increased life expectancy in the 19th century. At the beginning of the 20th century, the influence of technical equipment and biomedical research led to a further leap in life expectancy. The use of computer devices with sophisticated software also improved the quality of life. This is linked to the fact that all these achievements have now led to the emergence of one of the largest import and export markets in the USA, alongside the european union (EU), which is an association of European states. In order to guarantee a uniform quality of this abundance of different products and therapies, there are worldwide corresponding regulations, to which all manufacturers must adhere. The entry into force of these regulations, with the associated approval and testing obligations for each individual medical device, ensures that a consistently high quality of products is used on patients. Of course, high quality as well as high functionality and safety levels of medical products are a must. However, the implementation of these regulations is realized differently in the various markets, as there is no global harmonization. This work focuses on approval procedures for medical devices in Europe (EU) and the USA and compares significant differences in the approval procedures, which are shown as a graphical comparison. An example is an approval of medical devices by the U.S. Food and Drug Administration (FDA), which is an US government agency. In Europe (EU) there is a manufacturer’s declaration of conformity for the approval.

INTEGRATION OF MASS OPEN ONLINE COURSES IN THE EDUCATIONAL PROCESS OF A PEDAGOGICAL UNIVERSITY

2020 ◽  
Vol 88 (3) ◽  
pp. 111-123
Author(s):  
Ilia V. Kudinov ◽  
◽  
Gulnara F. Kudinova ◽  
Keyword(s):  
Higher Education ◽  
Online Courses ◽  
Human Life ◽  
A Priori ◽  
Learning Technologies ◽  
Educational Process ◽  
Modern World ◽  
High Quality ◽  
Higher Education System

The relevance of the problem stated in the article is due to the fact that the role and functions of higher education institutions is fundamentally changing nowadays. It happens thanks to breakthrough IT solutions in various areas of human life, the development of online learning technologies, and the increased need for fast and highly specialized education. This is primarily due to the demands of the time – the transformation of the modern world economy towards digitalization. The purpose of the work was to obtain objective information about the effectiveness of the use of innovative forms in the educational process of higher education. The implementation of the priority project in the field of education "Modern digital educational environment in the Russian Federation" allowed us to deploy a national Internet platform with the possibility of integrating mass open online courses (MOOCs) into the educational process. This approach has opened up new opportunities for universities to implement online educational programs and use Internet technologies to form individual educational trajectories of students. A priori, the high quality of moocs was declared and, as a result, the high quality of students educational results. However, there were no separate studies on the quality of students' competence formation. The article considers models for organizing the educational process in higher education using mass open online courses, describes the experience of the Bashkir state pedagogical University named after M. Akmulla as a specialized pedagogical university, considers private methods for online and offline training in the higher education system, and presents experimental data on the introduction of online lectures as an element of MOOCs in the educational process of a pedagogical university. The authors as well studied the students' opinions about new forms of education.

Sign in / Sign up

Export Citation Format

Share Document