plastic
PLASTICS
PE :Polyethylene is a thermoplastic polymer with variable crystalline structure and an extremely large range of applications depending on the particular type. It is one of the most widely produced plastics in the world .
There are a vast array of applications for polyethylene in which certain types are more or less well suited.
machines.polyethyline In solid form, no. In fact, Polyethylene is often used in food handling. It could be toxic if inhaled and/or absorbed into the skin or eyes as a vapor or liquid (i.e. during manufacturing processes).one as common applications of this plastic is in construction .
PS: Polystyrene is used widely in packaging under the trade name “styrofoam.” It is also available as a naturally transparent solid commonly used for consumer products like soft drink lids or medical devices like test tubes or petri dishes.
One short phrase to describe the major benefits of Polystyrene relative to other plastics and materials would be:foam apliccation.
PVC :Polyvinyl Chloride is perhaps most well known for its use in residential and commercial property construction applications. Different types of PVC are used for plumbing, insulation of electrical wires, and “vinyl” siding.
Perhaps most importantly, polypropylene is adaptable to a variety of manufacturing techniques which makes it one of the most commonly produced and highly demanded plastics on the market.
MELAMINE
The aesthetic of melamine is flexible and can be matched to any décor. A laminate is applied to the outer surfaces of melamine that can be used to match it to any style of kitchen, including some laminates that resemble wood grain. Melamine is made using particles of wood, paper and resin, which are all combined under extreme pressure. BAKELITE
Just like any other plastic -based product,
Polyester resins are unsaturated synthetic resins that form when polyhydric alcohols and dibasic organic acids react. Maleic anhydride, which has diacid functionality, is commonly used as a raw material to produce polyester resins. Polyester resins are used in bulk molding compound, sheet molding compound and laser printer toners.
Examples of elastomers include natural rubbers, styrene-butadiene block copolymers, polyisoprene, polybutadiene, ethylene propylene rubber, ethylene propylene diene rubber, silicone elastomers, fluoroelastomers, polyurethane elastomers, and nitrile rubbers.
Neoprene.
Plastics are materials formed by chains of carbon and hydrogen
atoms. We call these chains polymers, while the atoms that form them are called monomers. There are three different types of plastics:
1 THERMOPLASTICS
Thermoplastics are defined as polymers that can be melted and recast almost indefinitely. They are molten when heated and harden upon cooling. One of thermpoplastic characteristics is : they are reversible, so the material can be reheated, reshaped, and frozen repeatedly.
As a result, thermoplastics are mechanically recyclable. Some of the most common types of thermoplastic are polypropylene, polyethylene, polyvinylchloride, polystyrene, polyethylenetheraphthalate and polycarbonate.
Thermoplastics are defined as polymers that can be melted and recast almost indefinitely. They are molten when heated and harden upon cooling. One of thermpoplastic characteristics is : they are reversible, so the material can be reheated, reshaped, and frozen repeatedly.
As a result, thermoplastics are mechanically recyclable. Some of the most common types of thermoplastic are polypropylene, polyethylene, polyvinylchloride, polystyrene, polyethylenetheraphthalate and polycarbonate.
PE :Polyethylene is a thermoplastic polymer with variable crystalline structure and an extremely large range of applications depending on the particular type. It is one of the most widely produced plastics in the world .There are a vast array of applications for polyethylene in which certain types are more or less well suited.
They also have diferent types,PE also is use for develope CNC machines and 3D
machines.polyethyline In solid form, no. In fact, Polyethylene is often used in food handling. It could be toxic if inhaled and/or absorbed into the skin or eyes as a vapor or liquid (i.e. during manufacturing processes).one as common applications of this plastic is in construction .
PS: Polystyrene is used widely in packaging under the trade name “styrofoam.” It is also available as a naturally transparent solid commonly used for consumer products like soft drink lids or medical devices like test tubes or petri dishes.One short phrase to describe the major benefits of Polystyrene relative to other plastics and materials would be:foam apliccation.
polystyrene is typically (but not always) a homopolymer meaning that it is composed only of the monomer styrene in combination with itself. Depending on the type of PS it could be classified as a “thermoplastic” or a “thermoset” material.
PVC :Polyvinyl Chloride is perhaps most well known for its use in residential and commercial property construction applications. Different types of PVC are used for plumbing, insulation of electrical wires, and “vinyl” siding.
Three words or short phrases to describe the major benefits of PVC relative to other plastics and materials would be:Brittle ,Rigid (although different PVC variants are actually designed to be very flexible) and Strong.
if PVC is toxic, generally speaking polystyrene is non-toxic and odorless. It is a predominant plastic in the food packaging industry.
PP:Polypropylene is used in a variety of applications to include packaging for consumer products, plastic parts for the automotive industry, special devices like living hinges, and textiles. It is semi-transparent, has a low-friction surface, doesn’t react well with liquids, is easily repaired from damage and has good electrical resistance (i.e. it is a good electrical insulator).
Perhaps most importantly, polypropylene is adaptable to a variety of manufacturing techniques which makes it one of the most commonly produced and highly demanded plastics on the market.
Two short phrases to describe the major benefits of Polypropylene relative to other plastics and materials would be: Unique Use For living hinges amd Simple To Manufacture
PET: polyethylene terephthalate is the most widely produced plastic in the world. It is used predominantly as a fiber (known by the trade name “polyester”) and for bottling or packaging. For example, PET is the plastic used for bottled water and is highly recyclable.
Three words or short phrases to describe the major benefits of Polyethylene relative to other plastics and materials would be:Wide applications as a fiber (“polyester”),Extremely effective moisture barrier and Shatterproof
PET is unique in that it is virtually shatterproof, has an extremely high strength to weight ratio and does not react to food and water.
The combination of these material properties in addition to its wide availability and low price make it a nearly unbeatable solution for consumable product packaging.
Polyester for fabrics is strong, flexible, and when combined with materials like cotton can reduce wrinkling, shrinking, and makes the fabric more resistant to tears.
PC: Polycarbonate is a transparent material known for its particularly high impact strength relative to other plastics. It is used in greenhouses where high transmissivity and high strength are both required or in riot gear for police.
Two words or short phrases to describe the major benefits of Polycarbonate relative to other plastics and materials would be:Transparent and High
Strength are used to produce a variety of materials and are particularly useful when impact resistance and/or transparency are a product requirement (e.g. in bullet-proof glass).
PC is commonly used for plastic lenses in eyewear, in medical devices, automotive components, protective gear, greenhouses, Digital Disks (CDs, DVDs, and Blu-ray), and exterior lighting fixtures. Polycarbonate also has very good heat resistance and can be combined with flame retardant materials without significant material degradation.
Polycarbonate plastics are engineering plastics in that they are typically used for more capable, robust materials such as in impact resistant “glass-like” surfaces.
THERMOSET PLASTICS
Thermoset is a material that strengthens when heated, but cannot be remolded or heated after the initial forming thermoset products can withstand higher temperature without loss of its structural integrity.
MELAMINE
is a white crystalline organic base C3H6N6 with a high melting point that is used especially in melamine resins.
Melamine is a manufactured wood. It is similar to particle board, but melamine is exceptionally stronger and made using a different process.
The improvements in the overall construction of melamine have advanced the product’s use and popularity in the market. Today, many homeowners that are concerned with preserving sustainable resources are choosing melamine as an alternative to hardwood cabinetry.
The aesthetic of melamine is flexible and can be matched to any décor. A laminate is applied to the outer surfaces of melamine that can be used to match it to any style of kitchen, including some laminates that resemble wood grain. Melamine is made using particles of wood, paper and resin, which are all combined under extreme pressure. BAKELITE
polyoxybenzylmethylenglycolanhydride was the first PLASTIC made from synthetic components. It is a thermosetting phenol formaldehyde resin, formed from a condensation reaction of phenol with formaldehyde.
Then in 1909, a Belgian chemist named Leo Baekeland . created the first entirely synthetic plastic—and it would revolutionize the way many consumer goods were manufactured. Baekeland called his plastic “Bakelite.”
Just like any other plastic -based product,
disposing bakelite is extremely hazardous to the environment. ... Not only did these products contain formaldehyde, bakelite contained asbestos, a known and hazardous toxin. Exposure to bakelite dust may cause lung infections, mesothelioma and other respiratory complications.
People bought Bakelite jewelry boxes, lamps, desk sets, clocks, radios, telephones, kitchenware, tableware, and a variety of game pieces such as chess sets, billiard balls, and poker chips...
POLYESTER
Polyester resins are unsaturated synthetic resins that form when polyhydric alcohols and dibasic organic acids react. Maleic anhydride, which has diacid functionality, is commonly used as a raw material to produce polyester resins. Polyester resins are used in bulk molding compound, sheet molding compound and laser printer toners.
They are typicaly used in restaurants , kitchens... polyester like other plastics they have advatages and disadvatages ,four advantages are :
- Adequate resistance to water and variety of chemicals.
- Adequate resistance to weathering and ageing.
- Low cost.
- Polyesters have good wetting to glass fibres.
The use of unsaturated polyesters and additives such as styrene lowers the viscosity of the resin. The initially liquid resin is converted to a solid by cross-linking chains.
ELASTOMERS
A generic term for all substances having the properties of stretching under tension, high tensile strength, retracting rapidly, and recovering their original dimensions fully. They are generally POLYMERS.
Thus, not all polymers have the necessary internal flexibility to be extensible and highly elastic. In order to have these properties, polymers must have little internal hindrance to the random motion of their monomer subunits (in other words, they must not be glassy), and they must not spontaneously crystallize (at least at normal temperatures).
Examples of elastomers include natural rubbers, styrene-butadiene block copolymers, polyisoprene, polybutadiene, ethylene propylene rubber, ethylene propylene diene rubber, silicone elastomers, fluoroelastomers, polyurethane elastomers, and nitrile rubbers.
RUBBER
Elastomers are best described as rubbery materials. Rubber originally meant natural rubber. Later on, elastomer became the word used to talk about synthetic rubbers. Most rubbery materials are now considered a type of elastomeric material.
Liquid and gas handling systems require flexible, durable and reliable seals. Elastomers are perfectly suited for this type of use. Elastomers improve system service life by making them more reliable. They also reduce maintenance costs.
Neoprene.
Neoprene exhibits good chemical stability and maintains flexibility over a wide temperature range. Neoprene is sold either as solid rubber or in latex form and is used in a wide variety of applications, such as laptop sleeves, orthopaqedic braces (wrist, knee, etc.), electric insulation liquid and sheet applied elastomeric membranes or flashings, and automovile fan belts
It can be used as a base for adhesives noise isolation in power transformer installations, and as padding in external metal cases to protect the contents while allowing a snug fit.
It can be used as a base for adhesives noise isolation in power transformer installations, and as padding in external metal cases to protect the contents while allowing a snug fit.
Also ,has lot of uses in music,gardening...
Neoprene is a popular material in making protective clothing for aquatic activities.
Neoprene is a popular material in making protective clothing for aquatic activities.
The Rodhes piano used hammer tips made of neoprene in its electric pianos, after changing from felt hammers around 1970.
Neoprene is also used for speaker cones and drum practice pads.
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