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Безопасность детей в интернете. форум для родителей
Презентация к докладу на форуме "Мудрый родитель - счастливый ребенок"
Докладчик Анастасия Овчаренко
Веб-студия TessLab
Продвижение компании пресс-релизами
Виталий Шептун, руководитель отдела маркетинга Компасс Украина
Доклад прозвучал на Всеукраинском семинаре 1С-Битрикс "Интернет-магазины - секреты успеха" 5 июня 2014г. Харьков.
Организатор семинара TessLab
Cast versus blown film
This document compares cast and blown film production technologies for polyamide films. Cast film uses a chill roll for efficient cooling, resulting in faster cooling rates that produce films with lower crystallinity, higher transparency, and better thermoforming performance compared to blown film. Blown film uses air cooling, which is less efficient than the chill roll, leading to slower cooling rates and more crystallinity. However, blown film requires less floor space and investment. Both technologies can produce similar applications, but cast film is generally better for properties requiring fast cooling while blown film has lower costs.
Agricultural barrier films Plast09
Agricultural barrier films are necessary to reduce emissions of the fumigant methyl bromide into the atmosphere and increase its effectiveness. Barrier materials like EVOH, polyamides, and coatings are used in multi-layer film structures to contain methyl bromide. Polyamide 6 has good barrier properties but a high melting point, making processing difficult. Akulon XP polyamide 6 offers improved rheology over standard polyamide 6, allowing for better bubble stability, larger film outputs, and reduced costs for agricultural barrier films.
Recommended
Безопасность детей в интернете. форум для родителей
Презентация к докладу на форуме "Мудрый родитель - счастливый ребенок"
Докладчик Анастасия Овчаренко
Веб-студия TessLab
Продвижение компании пресс-релизами
Виталий Шептун, руководитель отдела маркетинга Компасс Украина
Доклад прозвучал на Всеукраинском семинаре 1С-Битрикс "Интернет-магазины - секреты успеха" 5 июня 2014г. Харьков.
Организатор семинара TessLab
Cast versus blown film
This document compares cast and blown film production technologies for polyamide films. Cast film uses a chill roll for efficient cooling, resulting in faster cooling rates that produce films with lower crystallinity, higher transparency, and better thermoforming performance compared to blown film. Blown film uses air cooling, which is less efficient than the chill roll, leading to slower cooling rates and more crystallinity. However, blown film requires less floor space and investment. Both technologies can produce similar applications, but cast film is generally better for properties requiring fast cooling while blown film has lower costs.
Agricultural barrier films Plast09
Agricultural barrier films are necessary to reduce emissions of the fumigant methyl bromide into the atmosphere and increase its effectiveness. Barrier materials like EVOH, polyamides, and coatings are used in multi-layer film structures to contain methyl bromide. Polyamide 6 has good barrier properties but a high melting point, making processing difficult. Akulon XP polyamide 6 offers improved rheology over standard polyamide 6, allowing for better bubble stability, larger film outputs, and reduced costs for agricultural barrier films.
Synthetic sausage casings
This document discusses synthetic sausage casings. It describes the different types of materials that can be used including polymers like polyethylene, polyamides, and ethylene vinyl alcohol. Synthetic casings are often produced through blown film extrusion as mono- or multi-layer films. Multilayer casings typically have 5 layers and may include combinations of polymers and adhesive tie layers. The document outlines the requirements for synthetic casings including barrier properties, mechanics, and adhesion to meat. It provides details on production processes and common materials used to make casings that meet industry standards.
Bubble stability in blown film
This document discusses factors that determine bubble stability in blown film extrusion. It covers topics like melt viscosity, melt strength, temperature influence, bubble cooling, die construction, and material properties. Bubble stability is influenced by both the integrity of the molten film within the bubble (determined by melt properties) and the solid film above the frost line (determined by thickness, material stiffness, and cooling). Key factors that improve bubble stability include high melt viscosity, melt strength, efficient bubble cooling, and maintaining a low polymer temperature within the bubble.
Polyamide crystallization structures
This document discusses the crystallization of polyamide polymers. It explains that polyamides can crystallize from the melt upon moderate cooling or when absorbed moisture lowers the glass transition temperature below ambient conditions. The document outlines three common crystal structures - the alpha, beta, and gamma phases - that form through different cooling methods. It also explores how moisture content, temperature, and crystallinity influence various thermal and mechanical properties of polyamide 6, such as glass transition temperature, density, modulus, and barrier properties.
Pagev dsm presentation pa6 in film
The document discusses a new polyamide 6 called Akulon XP that has improved processing behavior compared to standard PA6. It has enhanced shear thinning properties that provide a wider processing window when used in multilayer films. This allows improved interlayer stability and reduces issues like neck-in. Akulon XP also provides benefits for processes like thermoforming by allowing more even thickness distribution and higher levels of elongation. The enhanced rheology of Akulon XP makes it suitable for improving the efficiency of various plastic film and part manufacturing processes.
Prejudices about polyamide for multilayer films
Although polyamide is widely used for the production of multilayer films, still some prejudices are persistent.
This presentation tries to explain the character of these prejudices to end with the conclusion that polyamide is a versatile polymer with good properties for multilayer films.
Bab: Types of text
The document defines and compares different types of texts:
- Descriptive text describes people, places, or things.
- Narrative text focuses on specific participants and tells stories using orientation, complication, and resolution.
- Recount text retells past events or experiences using orientation, events, and optional reorientation.
- Report text presents information about something as a result of observation and analysis using general classification and description.
- Procedure text shows a process through a sequence of steps using a goal, materials, and numbered steps.
Polyamide extrusion
This document provides guidelines for processing polyamide extrusion. It discusses how to properly handle moisture in polyamide resins to avoid issues in extrusion like foaming and breakdown. The appropriate screw design parameters and temperature settings for polyamide extrusion are covered. Post-treatment options for polyamide films are discussed, though they provide little additional benefit due to polyamide's inherently good properties. Common applications for polyamide films include food packaging and agricultural films.
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Synthetic sausage casings
This document discusses synthetic sausage casings. It describes the different types of materials that can be used including polymers like polyethylene, polyamides, and ethylene vinyl alcohol. Synthetic casings are often produced through blown film extrusion as mono- or multi-layer films. Multilayer casings typically have 5 layers and may include combinations of polymers and adhesive tie layers. The document outlines the requirements for synthetic casings including barrier properties, mechanics, and adhesion to meat. It provides details on production processes and common materials used to make casings that meet industry standards.
Bubble stability in blown film
This document discusses factors that determine bubble stability in blown film extrusion. It covers topics like melt viscosity, melt strength, temperature influence, bubble cooling, die construction, and material properties. Bubble stability is influenced by both the integrity of the molten film within the bubble (determined by melt properties) and the solid film above the frost line (determined by thickness, material stiffness, and cooling). Key factors that improve bubble stability include high melt viscosity, melt strength, efficient bubble cooling, and maintaining a low polymer temperature within the bubble.
Polyamide crystallization structures
This document discusses the crystallization of polyamide polymers. It explains that polyamides can crystallize from the melt upon moderate cooling or when absorbed moisture lowers the glass transition temperature below ambient conditions. The document outlines three common crystal structures - the alpha, beta, and gamma phases - that form through different cooling methods. It also explores how moisture content, temperature, and crystallinity influence various thermal and mechanical properties of polyamide 6, such as glass transition temperature, density, modulus, and barrier properties.
Pagev dsm presentation pa6 in film
The document discusses a new polyamide 6 called Akulon XP that has improved processing behavior compared to standard PA6. It has enhanced shear thinning properties that provide a wider processing window when used in multilayer films. This allows improved interlayer stability and reduces issues like neck-in. Akulon XP also provides benefits for processes like thermoforming by allowing more even thickness distribution and higher levels of elongation. The enhanced rheology of Akulon XP makes it suitable for improving the efficiency of various plastic film and part manufacturing processes.
Prejudices about polyamide for multilayer films
Although polyamide is widely used for the production of multilayer films, still some prejudices are persistent.
This presentation tries to explain the character of these prejudices to end with the conclusion that polyamide is a versatile polymer with good properties for multilayer films.
Bab: Types of text
The document defines and compares different types of texts:
- Descriptive text describes people, places, or things.
- Narrative text focuses on specific participants and tells stories using orientation, complication, and resolution.
- Recount text retells past events or experiences using orientation, events, and optional reorientation.
- Report text presents information about something as a result of observation and analysis using general classification and description.
- Procedure text shows a process through a sequence of steps using a goal, materials, and numbered steps.
Polyamide extrusion
This document provides guidelines for processing polyamide extrusion. It discusses how to properly handle moisture in polyamide resins to avoid issues in extrusion like foaming and breakdown. The appropriate screw design parameters and temperature settings for polyamide extrusion are covered. Post-treatment options for polyamide films are discussed, though they provide little additional benefit due to polyamide's inherently good properties. Common applications for polyamide films include food packaging and agricultural films.