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Sunday, December 20th, 2009Introduction to Balloons
The word ‘Balloons’ conjures up ideas in your mind of simple balloons you blow up for kid’s parties, or balloons that fly off on their own, or the special balloons for big events like the ones produced for the wedding of Charles and Diana? There are so many different types of balloons available that you can get almost anything for any event you need. Balloons are a bright, bouncy item that can be used for many different purposes, including kid’s or adult parties, product launches for advertising or promotional events.
When you think about it, a balloon is quite an odd item. It is something that expands when filled with air or some other type of gas, such as Helium or hydrogen and is very fragile so that it can easily burst. The very early balloons would have been made with non-stretch material but modern balloons have great elasticity because they are made of Latex and can be filled up to create much larger sizes than earlier ones. Balloons come in many different sizes and colours and can brighten up any event and create a festive atmosphere.
Balloons Throughout History
The first known balloons were very simple in that they were made out of the bowels of animals. The Aztec Indians in Central and Southern America carefully cleaned out the cat gut, turned it inside out and sewed it with special vegetable thread that stuck to itself when dried in the sun creating an almost airtight seal. The balloons were shaped into model animals and then filled with air to be burnt on the top of the Aztec pyramid as an offering to the sun god. This was probably the first example of balloon modelling.
The first public exhibition of a balloon was at the Portuguese Court in Lisbon in seventeen hundred and nine by a Portuguese priest, Bartolomeu de Gusmao, and was most likely to be made from an animal bladder that stretched when filled with air. The modern rubber balloon was invented in eighteen twenty four by Michael Faraday the renowned English chemist and physicist who invented, amongst other many other things, the Faraday cage and he also made huge contributions to the fields electromagnetism and electrochemistry. The balloons Faraday used were filled with hydrogen for his science experiments with Hydrogen, but the more everyday Latex balloon did not appear until 1847. Although the Latex balloon was manufactured in London in the mid 1800’s and early rubber balloons were sold in America in parks and circuses for a penny each; the mass production of them did not happen until a hundred years later in nineteen thirty one.
The balloon industry became more advanced as they developed in line with technology. Now balloons are made from rubber Latex, polychloroprene or nylon and may be inflated with air, Helium, hydrogen or water. Filling the balloon with air can be done with the mouth, a manual hand pump, electric inflator, foot pump or with compressed gas. Balloons are used for many differing purposes, and decorated in numerous ways to suit the event.
Some balloons are purely for decoration, others are ideal for specific purposes because of their low density and are relatively cheap to procure. The balloon’s properties have led to them being used in a wide range of other applications in the areas of meteorology, military defence, medical treatment, and transportation. There are many different types of balloons which can be categorised under different headings.
Different Balloon Types
Good Old Party Balloons
The most popular types of balloons are the ones we are used to seeing at parties, generally a child’s party. These are usually bought in small packets and blown up by mouth or with a pump to create a festive scene for children’s parties and other kinds of celebratory events. These days you often see a cluster of balloons at the entrance to a house or hall to indicate where the party is being held, it has almost become a universal indicator of a party in progress! The balloons come in varying sizes and colours and can have printing on the face which expands as the balloon is inflated. Party balloons are generally made of natural Latex tapped from rubber trees. The rubber’s elasticity makes the size variable. Balloons filled with air always hold their size and shape much longer than those filled with Helium.
There is a great range of colours for balloons and many different sizes due to the flexibility of the material from which they are made. Using balloons for decorating a special event is a relatively .
Foil Balloons
The foil balloon or Mylar balloons first appeared during the late 1970s. They are slightly more high priced than Latex balloons and are made of thin non-stretch metalized plastic film or Mylar. The first time I remember them being used a major event was when they made an appearance at the wedding of Prince Charles and Lady Diana and they caused quite a stir. These balloons have attractive glossy reflective finish and can be printed with colour pictures, logos and patterns to customise them. The most important property of metalized nylon for balloons is its propensity to keep the Helium gas from leaking for several weeks because it is less permeable. Foil balloons also have the benefit of being light weight, longer-lasting with increased buoyancy. They are ideal for unusual celebrations, in-store decorations, parties and for gifts. At my Mum’s 90′th birthday party recently my son brought along a foil balloon with 90 printed on it to add to the occasion .Mylar balloons or foil balloons can also be made into animal shapes and can be printed with branding to advertise an event.
Balloons Shaped as Animals
Animal shaped balloons are ade from metalized nylon which can easily be cut into pieces so that when stuck together they make the three dimensional shapes of animals. Screen printing the appropriate design on the model, makes the chosen animal come realistically alive. Once inflated, these attractive items make a very bright decorative impact for that special event. Balloons in animal shapes may be used as gifts or as a talking point at your special event. Balloons shaped like animals can make a great birthday gift for a child as an extra treat.
Balloon Rockets
Inflating a balloon and letting it go before tying it is as game most children play at some time or another (and adults too)! The rude noise it makes generally has all but the really stone faced falling about laughing as it shoots around the building in a random manner. This demonstration is an experiment in how a rocket works and they are called balloon rockets. As a kid I can remember being intrigued as I learned how they worked.
When the mouth of the balloon is let-go, the balloon contracts so that the greater pressure of air inside is forced out causing the balloon to be propelled forward. This is essentially how a rocket works. The balloon can also be inflated with different gases other than air, providing the same effect. Balloon rockets are a widely used a learning aid to demonstrate the principles in physics of the operation of a rocket. The balloon rocket is also often used to demonstrate Newton’s third law in physics.
Water Balloons
The water balloons are obviously filled with water and are intended for children to lob at each other as a game or practical joke with the aim of getting each other wet. They are often not as big as normal sized balloons and made from weaker rubber so that they can be easily broken. Water balloons are often used in competitions or games.
Balloons Filled with Helium Gas
The reason Helium balloons float is because they are filled with Helium gas which is less dense than air. So for an event where balloons are set off into the air, they will all be Helium filled balloons. If the Helium balloons are rubber balloons they will only retain their buoyancy for a few days. This is because the Latex has tiny holes that are larger than the enclosed Helium atoms so the Helium gradually leaks out. To increase the float time of a Helium balloon the inside of the balloons can be coated with a special polymer solution which lessens the leakage of the Helium for a week or more. Helium is a gas which is lighter than air resulting in Helium balloons to rise up unless tied to something fixed.
Sculpting with Balloons
Balloon Sculptures are made from hundreds of balloons to create a solid structure such as a balloon arch, wall or statute. Other shapes are more difficult, but on occasion more ambitious sculptures have been built so they are possible. These sculptures are usually made and designed by professional balloon modellers as it is a very skilled job. Balloon sculptures are really quite restricted because of the round shape of the balloons but with clever colour choice simple arches or walls can make an impressive feature at your party. The balloons need to be precision filled with exactly the same amount of gas and to do this professional balloon sculptors use electronic equipment to deliver the exact amount of Helium into the balloon. For non-floating balloons air inflators are used. Professional grade balloons differ from most retail packet balloons as they are bigger in size, stronger and made from 100% biodegradable Latex. Sometimes Helium balloons are used as table decorations for weddings which may have three or five balloons with an arrangement of flowers. The decoration will usually include curled ribbon with an added weight to stop the balloons from floating away.
Balloon Modelling and Balloons in Art
Balloon modelling is a popular entertainment for children and adults alike and is not to be confused with balloon sculptures discussed above. The Latex used for balloon modelling is made of extra-stretchy rubber so that it can be manipulated and tied without bursting when making the balloon model. A Balloon modelling artist pulls and twists the inflated tubular balloons into shapes of animals, people or hats. When you watch a balloon modeller at work you half expect that the balloons will pop when they are twisting and tying their handy work. These tiny modelling balloons are extremely difficult to inflate and often need a pump to get them started, until you have developed the lungs for it.
Balloon Drops
I am sure you will have been to a party or dance where at the end of the evening lots of balloons are dropped from the ceiling to create excitement and fun amongst the audience. This is known as a balloon drop and is often performed at parties such as New Year’s Eve celebrations or at political rallies and conventions. It is a relatively low budget way of generating a festive atmosphere at the party climax, so everyone goes home feeling they have had a really great evening.
It is possible to create your own balloon drop for your special event providing you have a room with enough height. To begin with you will need to set up a large plastic bag or net overhead, which is suspended at the required height, to hold the balloons. Get your other organisers to lend a hand with blowing up balloons as it can take a long time to do the number needed. Then insert the inflated balloons into the net and make sure the opening works so that the balloons will fall onto the target area below when they are released. You will also need to develop a mechanism for releasing the balloons, and make sure you have thoroughly tested it so everything goes to plan at the big moment.
Often advertising balloons are inflated with Helium so that they will float into the sky to make the greatest impact on the public.
Balloon Releases
Due to concerns about the effect on the environment of a large amount of balloons being released, the NABAS - The Balloon Association have produced a code of practise that is available on their website at www.nabas.co.uk
If you are planning a balloon race in excess of 5,000 balloons, it is a pre-requisite that you apply in writing for permission to the Civil Aviation Authority (CAA) at least 28 days before the event. The CAA also like to be notified about balloon releases of less than 5,000. An application form can be requested by calling either the NABAS office on 01989 762 204 or the Airspace Utilisation Section of the CAA on 020 7453 6599
Environmental Concerns and Balloon Safety
Latex is an organic product from rubber trees that are cultivated in certain areas of the tropics, so balloons are completely environmentally friendly being manufactured from natural rubber Latex (NRL). These trees are not cut down to extract the NRL. The NRL is released by tapping mature trees and is an important sustainable crop providing work for many agricultural labourers in some of the poorest areas of the world.
The planting and maintenance of rubber tree plantations helps towards the prevention of tropical rainforest deforestation. Without the cultivation and the consumption of Latex products the plantations may very well become just another object of the clearance of land for construction. One of the great by-products of NRL cultivation is the noticeable contribution to the removal of greenhouse gases from the atmosphere that is produced by industrialised nations and is a major source of global warming. The tropical regions in which rubber trees grow are often in some of the poorest parts of the world, so an industry from such a sustainable source is a vital income for the population.
Printed Latex balloons are an absolutely fantastic, low-cost and environmentally friendly way of advertising your promotion or event.
Conclusion
The toy balloon has been a source of pleasure and excitement for many years at celebratory events such as parties, product launches and conferences throughout the world. They have been an educational tool as well as providing hours of fun and play for children and adults alike. Non toy balloons are used for experiments in science, as an aid for heart repair in medicine and even as a form of travel as in the hydrogen air ship idea. Balloons are invaluable in helping us to learn about our world and some of the properties of physics.