Fiberglass is a composite material made of glass fibers set in a resin matrix. It combines light weight with strength, providing a weather-resistant and robust material. There are four main methods to produce fiberglass: hand lay-up, spray lay-up, filament winding, and pultrusion. Fiberglass has applications in industries like telecommunications, construction, automotive, boats, and water/waste systems due to its properties of strength, corrosion resistance, and insulation.
Glass fiber is a material consisting of numerous extremely fine fibers of glass. Glassmakers throughout history have experimented with glass fibers, but mass manufacture of glass fiber was only made possible with the invention of finer machine tooling.
Glass fiber is a material consisting of numerous extremely fine fibers of glass. Glassmakers throughout history have experimented with glass fibers, but mass manufacture of glass fiber was only made possible with the invention of finer machine tooling.
This presentation gives complete detail about the production, construction and applications with examples of different types of glass and polymers used in buildings
Polyester resin is more commonly referred to as fiberglass or laminating resin. However, we have come across its manufacturing process and learned that fiberglass reaches in numerous shapes and has different types of glasses.
Honest Reviews of Tim Han LMA Course Program.pptxtimhan337
Personal development courses are widely available today, with each one promising life-changing outcomes. Tim Han’s Life Mastery Achievers (LMA) Course has drawn a lot of interest. In addition to offering my frank assessment of Success Insider’s LMA Course, this piece examines the course’s effects via a variety of Tim Han LMA course reviews and Success Insider comments.
Acetabularia Information For Class 9 .docxvaibhavrinwa19
Acetabularia acetabulum is a single-celled green alga that in its vegetative state is morphologically differentiated into a basal rhizoid and an axially elongated stalk, which bears whorls of branching hairs. The single diploid nucleus resides in the rhizoid.
2024.06.01 Introducing a competency framework for languag learning materials ...Sandy Millin
http://sandymillin.wordpress.com/iateflwebinar2024
Published classroom materials form the basis of syllabuses, drive teacher professional development, and have a potentially huge influence on learners, teachers and education systems. All teachers also create their own materials, whether a few sentences on a blackboard, a highly-structured fully-realised online course, or anything in between. Despite this, the knowledge and skills needed to create effective language learning materials are rarely part of teacher training, and are mostly learnt by trial and error.
Knowledge and skills frameworks, generally called competency frameworks, for ELT teachers, trainers and managers have existed for a few years now. However, until I created one for my MA dissertation, there wasn’t one drawing together what we need to know and do to be able to effectively produce language learning materials.
This webinar will introduce you to my framework, highlighting the key competencies I identified from my research. It will also show how anybody involved in language teaching (any language, not just English!), teacher training, managing schools or developing language learning materials can benefit from using the framework.
Palestine last event orientationfvgnh .pptxRaedMohamed3
An EFL lesson about the current events in Palestine. It is intended to be for intermediate students who wish to increase their listening skills through a short lesson in power point.
Unit 8 - Information and Communication Technology (Paper I).pdfThiyagu K
This slides describes the basic concepts of ICT, basics of Email, Emerging Technology and Digital Initiatives in Education. This presentations aligns with the UGC Paper I syllabus.
Read| The latest issue of The Challenger is here! We are thrilled to announce that our school paper has qualified for the NATIONAL SCHOOLS PRESS CONFERENCE (NSPC) 2024. Thank you for your unwavering support and trust. Dive into the stories that made us stand out!
Francesca Gottschalk - How can education support child empowerment.pptxEduSkills OECD
Francesca Gottschalk from the OECD’s Centre for Educational Research and Innovation presents at the Ask an Expert Webinar: How can education support child empowerment?
June 3, 2024 Anti-Semitism Letter Sent to MIT President Kornbluth and MIT Cor...Levi Shapiro
Letter from the Congress of the United States regarding Anti-Semitism sent June 3rd to MIT President Sally Kornbluth, MIT Corp Chair, Mark Gorenberg
Dear Dr. Kornbluth and Mr. Gorenberg,
The US House of Representatives is deeply concerned by ongoing and pervasive acts of antisemitic
harassment and intimidation at the Massachusetts Institute of Technology (MIT). Failing to act decisively to ensure a safe learning environment for all students would be a grave dereliction of your responsibilities as President of MIT and Chair of the MIT Corporation.
This Congress will not stand idly by and allow an environment hostile to Jewish students to persist. The House believes that your institution is in violation of Title VI of the Civil Rights Act, and the inability or
unwillingness to rectify this violation through action requires accountability.
Postsecondary education is a unique opportunity for students to learn and have their ideas and beliefs challenged. However, universities receiving hundreds of millions of federal funds annually have denied
students that opportunity and have been hijacked to become venues for the promotion of terrorism, antisemitic harassment and intimidation, unlawful encampments, and in some cases, assaults and riots.
The House of Representatives will not countenance the use of federal funds to indoctrinate students into hateful, antisemitic, anti-American supporters of terrorism. Investigations into campus antisemitism by the Committee on Education and the Workforce and the Committee on Ways and Means have been expanded into a Congress-wide probe across all relevant jurisdictions to address this national crisis. The undersigned Committees will conduct oversight into the use of federal funds at MIT and its learning environment under authorities granted to each Committee.
• The Committee on Education and the Workforce has been investigating your institution since December 7, 2023. The Committee has broad jurisdiction over postsecondary education, including its compliance with Title VI of the Civil Rights Act, campus safety concerns over disruptions to the learning environment, and the awarding of federal student aid under the Higher Education Act.
• The Committee on Oversight and Accountability is investigating the sources of funding and other support flowing to groups espousing pro-Hamas propaganda and engaged in antisemitic harassment and intimidation of students. The Committee on Oversight and Accountability is the principal oversight committee of the US House of Representatives and has broad authority to investigate “any matter” at “any time” under House Rule X.
• The Committee on Ways and Means has been investigating several universities since November 15, 2023, when the Committee held a hearing entitled From Ivory Towers to Dark Corners: Investigating the Nexus Between Antisemitism, Tax-Exempt Universities, and Terror Financing. The Committee followed the hearing with letters to those institutions on January 10, 202
Instructions for Submissions thorugh G- Classroom.pptxJheel Barad
This presentation provides a briefing on how to upload submissions and documents in Google Classroom. It was prepared as part of an orientation for new Sainik School in-service teacher trainees. As a training officer, my goal is to ensure that you are comfortable and proficient with this essential tool for managing assignments and fostering student engagement.
Operation “Blue Star” is the only event in the history of Independent India where the state went into war with its own people. Even after about 40 years it is not clear if it was culmination of states anger over people of the region, a political game of power or start of dictatorial chapter in the democratic setup.
The people of Punjab felt alienated from main stream due to denial of their just demands during a long democratic struggle since independence. As it happen all over the word, it led to militant struggle with great loss of lives of military, police and civilian personnel. Killing of Indira Gandhi and massacre of innocent Sikhs in Delhi and other India cities was also associated with this movement.
2. FIBRE GLASS
Composite material using resin as matrix
and glass fiber as reinforcement
Fiberglass is a lightweight, extremely
strong, and robust material. Fiberglass
combines its light weight with an inherent
strength to provide a weather resistant
finish with a variety of surface textures.
There are 4 methods by which
fiberglass can be made. They are:
Fiberglass hand lay-up operation
Fiberglass spray lay-up operation
4. Glass Fiber
Reinforcement
Properties
◦ Mechanical Properties
similar to glass but
different strength
value
◦ Chemical Stability
Susceptible to
alkaline solutions and
hot water
◦ Thermal Properties
High heat resistance
◦ Electrical Properties
insulator
Glass Fiber
Processing
5. Glass Fiber Processing
Raw Materials
Major
◦ Silica
◦ Limestone
◦ Soda Ash
◦ Waste glass
Others
◦ Calcined Alumina
◦ Borax
◦ Magnesite
6. Glass Fiber Processing
Batching
Batching - exact quantities of raw
materials are mixed together before
being melted.
Materials are added to lower the
working temperature and add
additional properties like
strength,increase melting temperature
and are alkali resistant.
7. Glass Fiber Processing
Melting
Common furnaces has three sections:
◦ Receiver
The batch is melted and uniformly. Bubbles are also
removed
High temperature (1400oC or 2552oF)
◦ Refiner-High temperature (1370oC or 2500oF)
◦ Fore hearth – beneath this is are bushings
8. Glass Fiber Processing
Fiberization
Extrusion
◦ Extruded through
200-8000 bushings
made of alloys.
◦ Bushings are heated
electronically to
maintain
temperature and
consequently, glass
viscosity and
thickness
Attenuation
◦ Drawing extruded
molten glass into
filaments using high-
speed winder
◦ High-speed winding
applies tension.
9. Glass Fiber Processing
Coating
3 common types:
◦ Lubricants – Protect filaments from
abrading and breaking
◦ Binders – binds resin to glass fiber
◦ Coupling agents – increase affinity for
specific resins
11. Glass Fiber Processing
Packaging
Continuous-filament
◦ Rolled in drums and formed into yarns
Staple-fiber
◦ while cooling, jets of air break filaments into
lengths of 8-15 inches
Chopped fiber
◦ Yarns are chopped into short, uniform
lengths
Glass wool
◦ Cooling involves a downward jet of (hot) air,
making the fibers fall randomly onto a
conveyor belt, forming a fleecy mass
17. Fiberglass Processing
Molding
Plug
◦ Object with desired shape
◦ Can be formed with foams, wood, plaster,
etc.
Mold
◦ Supports glass fibers during resin curing
Mold release agent
◦ E.g. Polyvinyl alcohol
Gelcoat
◦ Pigmented resin, harder, more durable finish
◦ Followed by a coating of a fiberglass
18. Fiberglass Processing
Molding
Lay-up
◦ Hand lay-up
Hand pressure/vacuum/rollers used to ensure
even resin application
◦ Spray lay-up
Resin and reinforcements are sprayed onto the
vertical mold
◦ Vacuum bag
Fiber and resin are sucked to conform to the
mold using a vacuum