How do hamburger with plastic foam-Iota

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Service > How do hamburger with plastic foam

How do hamburger with plastic foam

EPS foam is a thermoplastic material per cubic meter volume contains 300-600 million independent sealed bubble, the volume of air containing 98% or more, due to the low thermal conductivity of the air, and because they were closed in the foam and convection can not, therefore EPS is a very good thermal insulation performance materials.
First, the definition of plastics
Plastic is a resin as a main component, at a certain temperature and pressure molded into a certain shape, and at room temperature can be maintained high molecular weight organic material a predetermined shape.
Resin refers to melting range usually transformed or when heated, by external force when the conversion has fluidity, solid or semi-solid or liquid at ordinary temperature, an organic polymer, it is a plastic basic, and most important component. Broadly speaking, any polymer in the plastics industry as a plastic base material can be called resin.
Second, the plastic classification
There is no exact classification of plastic, generally classified as follows: 1. Physical and chemical properties of plastics by sub thermoplastics: within a specific temperature range can be repeatedly softened by heating and hardened by cooling plastic. Plastics such as polyethylene, PVC.
Thermosetting plastics: due to heat or other conditions can be cured into insoluble infusible plastics material. Such as phenolics, epoxy plastics.
2. Press plastic with selected points
GE Plastics: - General refers to the yield, use of broad, forming a good, inexpensive plastic. Such as polyethylene, polypropylene, polyvinyl chloride and the like.
Engineering Plastics: - as some refer to withstand external force and have good mechanical properties and dimensional stability at high and low temperatures can still maintain its excellent performance, can be used as structural components of engineering plastics. Such as ABS, nylon, polysulfone and the like.
Specialty Plastics: - General refers to plastic with special features (such as heat-resistant, self-lubricating, etc.), applied to the special requirements. Such as fluorine plastics, silicone and so on.
3. Divided by plastic molding method
Molded Plastics: used for molding resin mixture. Such as general thermosetting plastics.
Laminated plastic: refers to the resin impregnated fabric, may be superimposed, hot material combination as a whole.
Injection, extrusion and blow-molding plastic: - generally refers to the energy at a cylinder temperature of melting, flowing, rapidly curing in the mold resin mixed families. Such as general thermoplastics.
Casting plastic: can under no pressure or little pressure, poured in a mold hardenable liquid resin into a shaped article of the mixture. Such as MC nylon.
Reaction Injection Molding: generally refers to the liquid raw material into the mold cavity pressure to obtain the finished curing reaction. Such as polyurethane.
4. Press plastic semi-finished products and sub-products
Molding powder: also known as plastic powder, major (such as phenol) and filler by mixing a thermosetting resin, pressing, crushing derived. Such as Bakelite powder.
Reinforced plastics: plus enhanced mechanical properties of materials and some have a greater improvement than the original one type of plastic resin.
Foam: There are countless micropores fit within the overall plastics.
Films: generally refers to the thickness of the flat O.25 mm below and soft plastics.
Third, the basic properties of plastics
1. Light weight, high strength. Lightweight plastic, the plastic generally have a density between 0.9 to 2.3 g / cm 3, only steel 1/8 ~ 1/4, about 1/2 of aluminum, while the lower density of the foam variety, about 0.01 ~ O.5 g / cm 3 between. Intensity per unit mass calculation is called the specific strength than the strength of reinforced plastics and some close to or even more than steel. For example alloy steel, the tensile strength per unit mass is 160 MPa, while the glass fiber reinforced plastic can reach 170 to 400 MPa.
2. Excellent electrical insulating properties. Almost all plastics have excellent electrical insulating properties, such as very small dielectric loss and excellent arc resistance properties, these properties can be comparable with the ceramic.
3. Excellent chemical stability. General plastic to chemicals have good acid and alkali corrosion resistance, especially PTFE chemical resistance even better than gold, even the ability, "aqua regia" and other corrosive electrolyte corrosion, is called "plastic king. "
4. Reducing friction, good wear resistance. Most plastic with excellent anti-friction, wear-resistant and self-lubricating properties. Many plastic parts manufacturing is the use of these features rubbing plastic, while adding some solid lubricants and wear-resistant filler in plastics, can reduce the friction coefficient or further improve its wear resistance.
5. Translucent and protective properties. Most plastics can be used as a transparent or translucent article, wherein as transparent plastic like polystyrene and an acrylic glass. Plexiglass chemical name for polymethyl methacrylate, glass can be used as aerospace materials. Polyvinyl chloride, polyethylene, polypropylene and other plastic film with good light transmission and thermal properties, widely used as agricultural film. Plastics having a variety of protective properties, and therefore used as protective-package articles, such as plastic film, boxes, barrels, bottles.
6. Shock absorption, excellent noise reduction performance. Some plastics flexible and resilient when it is subjected to external mechanical shock and vibration frequent, internally generated viscous friction, the mechanical energy is converted into heat, therefore, be used as cushioning material engineering silencer. For example, the production of plastic bearings and gear noise can be reduced, it is an excellent variety of foam cushioning material widely used silencers.
The excellent performance of the plastic, it has a wide range of uses in industrial and agricultural production and people's daily lives; it is from the past, as a substitute for metal, glass, ceramics, wood and fiber and other materials, and became the modern life and tips industrial indispensable material.

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