engineering

Vectran

Vectran is a engineering topic covered in the lgStudy science library. This page brings together a partial reference excerpt, illustrations, worked examples, real-world applications and a short study plan, so you can understand Vectran rather than just read about it. In short: Vectran is a manufactured fiber, spun from a liquid-crystal polymer (LCP) created by Celanese Corporation and now manufactured by Kuraray. Chemically it is an aromatic polyester produced by the polycondensation of 4-hydroxybenzoic acid and 6-hydroxynaphthalene-2-carboxylic acid.

Key takeaways

Vectran belongs to engineering; place it in that map before memorising details.
Learn the definition first, then one example that makes the definition concrete.
Connect Vectran to a quantity you can measure, compute or draw — that is where exam questions come from.
Reproduce the core statement of Vectran from memory before moving on to harder problems.

Reference excerpt

Vectran is a manufactured fiber, spun from a liquid-crystal polymer (LCP) created by Celanese Corporation and now manufactured by Kuraray. Chemically it is an aromatic polyester produced by the polycondensation of 4-hydroxybenzoic acid and 6-hydroxynaphthalene-2-carboxylic acid.

Properties

Advantages Vectran's golden fibers are noted for their thermal stability at high temperatures, high strength and modulus, low creep, and good chemical stability. They are moisture-resistant and generally stable in hostile environments. Polyester coating is often used around a Vectran core; polyurethane coating can improve abrasion resistance and act as a water barrier. Vectran has a melting point of 330 °C, with progressive strength loss from 220 °C.

Disadvantages Although the tensile strength is similar to that of Kevlar, Vectran tends to experience tensile fractures when exposed to significant stress. The wispy, hair-like fibers tend to fray, to easily acquire dirt, and to readily entangle in hook-and-loop fasteners, from which they must sometimes then be cut or (when possible) torn. If used without protective coatings, Vectran has low resistance to UV degradation and should not be used long-term in outdoor environments.

Usage Vectran fibers are used as reinforcing (matrix) fibers for ropes, electrical cables, sailcloth, and advanced composite materials, professional bike tires, and in electronics applications. It is used as one of the layers in the softgoods structure of NASA's Extravehicular Mobility Unit (spacesuit) designed and manufactured by ILC Dover and was the fabric used for all of the airbag landings on Mars: Mars Pathfinder in 1997 and on the twin Mars Exploration Rovers Spirit and Opportunity missions in 2004, also designed and manufactured by ILC Dover . The material was used again on NASA's 2011 Mars Science Laboratory in the bridle cables. Vectran is a key component of a line of inflatable spacecraft developed by Bigelow Aerospace, not only on two stations which are in orbit but also the Bigelow Expandable Activity Module which NASA is testing for its radiation shielding and thermal control capabilities. The United States Department of Homeland Security is sponsoring development of an inflatable plug made of Vectran to prevent flooding in New York City Subway tunnels and for other tunnels in New York City, as it is strong but relatively inexpensive, and not edible for rats. Vectran fiber is also used in manufacturing badminton strings such as Yonex BG-85 and BG-80. Vectran is also used in the manufacturing of Carlton Vapour Trail badminton rackets. Vectran is used as a puncture protection layer in Continental Bicycle tyres such as the Grand Prix 5000, Competition tubular (single layer) and Grand Prix 4 season (two layers). Vectran does not increase rolling resistance or downgrade casing performance.

Production Kuraray Co., Ltd. began manufacturing Vectran in 1990. As of June 2007, Kuraray has owned 100% of the worldwide Vectran production since 2005 when they acquired the Vectran business from Celanese Advanced Materials Inc. (CAMI), based in South Carolina, U.S. The total capacity of Vectran expanded from about 600 tons/yr in 2007 to 1000 tons/yr in 2008.

See also Aramid Twaron Carbon fiber Vectra

References

External links Vectran official site Kuraray official site Vectran | Engineering Data by SWICOFIL Archived 2018-05-16 at the Wayback Machine Vectran fiber weaver long fibre spun yarn Technora, aramid fiber Archived 2006-11-14 at the Wayback Machine Vectran in Mars rover airbags https://www.continental-tires.com/bicycle/technology/city-trekking/vectran

Illustrations

Worked examples

Example 1 — a first encounter with Vectran

Start with the simplest possible case. Write down what Vectran claims or describes in one sentence, then invent the smallest concrete situation in which that sentence is true. In engineering, the smallest case is usually a single object, a single equation or a single measurement. Check that every symbol or term in your sentence has a meaning in that case.

Example 2 — changing one variable

Take the situation from Example 1 and change exactly one quantity: double it, halve it, or set it to zero. Predict what should happen to Vectran before you calculate. Comparing your prediction with the result is the fastest way to find out whether you understand the idea or only the words.

Example 3 — an exam-style question

Typical questions about Vectran ask you to (a) state it precisely, (b) apply it to given data, and (c) explain a limitation. Practise writing all three answers in under five minutes; the third part is what separates a full-mark answer from an average one.

Applications of Vectran

In research: Vectran appears in engineering research whenever the underlying quantities have to be modelled precisely. Papers usually cite it as a starting assumption and then explore where it breaks down.
In technology and industry: Engineering practice reuses Vectran in design rules, simulations and safety margins. Knowing the idea lets you read a specification sheet and understand why the numbers look the way they do.
In the classroom: Vectran is common in secondary-school and first-year university syllabi. It links to neighbouring topics Brand name materials, Kuraray, Polyesters, so understanding it makes those chapters shorter.
In everyday life: Look for Vectran outside the textbook — in sport, cooking, traffic, electronics or the sky above you. An example you found yourself is remembered far longer than one you were given.

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How to study Vectran in 20 minutes

Read the reference excerpt below once, without taking notes.
Close the page and write down what Vectran means in your own words.
Compare your version with the excerpt and mark what you missed.
Work through the three examples above with pen and paper.
Explain Vectran out loud to somebody else — or to Teacher Smith in the lgStudy chat.

Frequently asked questions

What is Vectran in simple terms?

Why does Vectran matter?

Because it connects several engineering ideas at once: it gives you a definition you can apply, a quantity you can calculate, and a way to check whether a result is plausible.

How should I study Vectran?

Read the excerpt, restate it from memory, then work through the examples and applications listed on this page. The five-step study plan above takes about twenty minutes.

What does this page cover?

It gives you a compact reference excerpt plus original lgStudy explanations, examples, applications and study material on Vectran.