Archive for the ‘Plastic Glasses Explained’ Category

SAN Plastic Glasses

Tuesday, February 17th, 2009

SAN Reusable Plastic Glasses (styrene acrylonitrile) have good strength and clarity which can withstand dropping but not standing on. SAN Plastic Glasses look like glass and SAN is a tough plastic that can take a lot of heavy usage

This material is used for our reusable stemmed wineglass products in order to achieve a cost effective alternative to our Polycarbonate stemmed wineglasses.

SAN Plastic Glasses are recommended for household or restaurant use. All are dishwasher safe and can withstand temperatures of up to 100C.

SAN Reusable Plastic Glasses

Polystyrene Plastic Glasses

Tuesday, February 17th, 2009

Polystyrene Reusable Plastic Glasses are an alternative safety glass to the Polycarbonate. These hard walled glasses are ‘rigid’ (which is a round about way of saying they will break, but not easily).

These glasses also appear just like real glass but are cheaper than the real thing. These glasses have been in glass-washers (using a recognised glass detergent such as Finish) in excess of 100 cycles with no noticeable visual detraction. These glasses can withstand temperatures of up to 100C

Basically they don’t last as long as Polycarbonate glasses before becoming marked but will do a similar job, just not for as long a period.

Do not confuse rigid Plastic glasses with EPS glasses (Expanded Polystyrene) which are the very light weight ‘foam’ cups often described as the trade name Styrofoam and usually white in colour. We don’t sell any EPS products, our reasons are explained here.

Rigid Polystyrene Reusable Plastic Glasses

Polycarbonate Plastic Glasses

Tuesday, February 17th, 2009

Polycarbonate Reusable glasses are often referred to as safety glasses and many local councils and police forces are insisting that these glasses are used to minimize the risk of injury from ‘glassings’ (The word ‘Glass’ is sadly a verb in this country)

Polycarbonate Plastic Glasses are injection moulded and becoming more commonplace in Pubs, Bars and Restaurants as they will not break (if used as a weapon or otherwise)

Polycarb glasses look just like glass, are usually more expensive than glass as they ‘last forever’ and are lightweight.

Our Polycarbonate glasses will withstand 500 dishwasher cycles before showing signs of degradation (scratches etc). Polycarbonate glasses mark easily if not handled properly.

Polycarbonate glasses can withstand temperatures of up to 145C and are also used to make Police Riot Shields and Bullet Proof Glass.

Polycarbonate Reusable Plastic Glasses

Crystal Polystyrene Plastic Glasses

Tuesday, February 17th, 2009

Crystal Styrene Disposable Plastic Glasses will shatter and are not a practical option for use at outdoor sporting events. As these glasses shatter litter picking will quickly become an even more tedious operation if every glass has broken up into 100 pieces.

These glasses look like glass and are completely clear. Crystal Styrene glasses are best served at indoor events and more sophisticated surroundings where reusable glasses are not an option but disposables are required. Crystal Styrene glasses are commonly used in executive boxes at sporting grounds, wedding receptions and such.

There are two ways of manufacturing Crystal Styrene Plastic Glasses, Thermoforming and Injection Moulding.

Thermoforming is similar to vacuum forming, basically a sheet of plastic stretched over a mould. There are very little differences between thermoformed Crystal Styrene plastic glasses and injection moulded Crystal Styrene glasses, the telling sign that a product has been injection moulded are the ejector pin marks on the base (a small piece of plastic which appears like a dot)

More complicated shaped products can be achieved Injection moulding such as Plastic Champagne Flutes. Thermoformed Crystal Styrene glasses do not bring the problems associated with vacuum formed Polypropylene glasses (‘wobbly glasses’) as the Crystal Styrene material is more rigid.

Thermoformed Disposable Plastic GlassesInjection Moulded Disposable Plastic Glasses

Polypropylene Plastic Glasses

Tuesday, February 17th, 2009

Polypropylene Disposable Plastic Glasses are commonly known as ‘flexi’ tumblers as they can be bent and their shape manipulated. They can appear ‘cloudy’ and are not as clear as their Crystal Styrene counterparts. Polypropylene glasses are commonly used at festivals, outdoor sporting events and public houses as they do not shatter, are cheap and would be difficult to use as a weapon.

Most Polypropylene Tumblers found in the UK are vacuum formed which means that plastic is stretched over a cup shaped mould in order to manufacture the tumbler. A good example of this is our Vending and Non Vending Plastic Cups commonly used or found with Watercoolers, Vending machines and next to the dreaded dentists’ chair.

Vacuum forming a tumbler (stretching plastic over a mould) results in parts of the tumbler being thicker than others, usually the base and top of the tumbler has a higher concentration of plastic than the thinner side walls.

For this reason we do not sell vacuum formed plastic glasses over a certain size. Vacuum formed tumblers are better suited to ‘one glup’ small tumbler applications as large Pint Glasses can become ‘wobbly’ and difficult to handle.

You’ll recognize when you have been handed a pint of beer in a vacuum formed tumbler when the beer spills over the side of the glass and onto your hand as you have ever so slightly squeezed the flimsy tumbler (altering the capacity) and forced the beer out of the glass.

Our ‘Katerglass’ range of Plastic Pint Glasses are Injection Moulded which gives ‘uniform wall strength’ – the tumblers are more rigid, not thinner in the middle and generally easier to handle.

Katerglass Disposable Plastic Glasses