pc material is the number of plastic
pc material is the number of plastic, pc material is polycarbonate material, is a strong thermoplastic resin, it has a colorless and transparent, heat-resistant, impact resistance, flame retardant, high refractive index, good processing performance, etc., the following look at pc material is the number of plastic.
PC material is a number of plastic 1
The number within the environmental protection mark is to represent a type of plastic products. 7 of the material is polycarbonate.
PC is the abbreviation for Polycarbonate. Since polycarbonate does not belong to the range of materials 1-6 above, the number in the middle of the triangle of the recycling symbol is 7. At the same time, in order to facilitate the sorting of recycling, the name of the material PC is indicated next to the recycling symbol. 7 is made of water cups which are prone to releasing poisonous substances Bisphenol A, which is harmful to the human body, so do not heat up when using them and make sure that you don't use them in a hot environment. Remember not to heat it when using it, and don't expose it to direct sunlight.
Expanded:
Six other plastic materials:
No. 1: PET (polyethylene terephthalate), which is a material used to make containers. Material made of containers, is a common plastic bottles filled with soda, also commonly known as "PET bottles". Heat-resistant to 70 ℃ easily deformed, there are harmful substances out of the melt. 1 plastic products with 10 months, can release carcinogenic DEHP.
2: HDPE (high density polyethylene), detergents, shampoo, body lotion, cooking oil, pesticides and so on containers are mostly made of HDPE. The containers are mostly opaque and feel like wax.
No. 3: PVC (polyvinyl chloride), used to manufacture water pipes, raincoats, school bags, building materials, plastic film, plastic boxes and other objects. Excellent plasticity, cheap, so the use of very common, can only be heat-resistant 81 ℃. High temperature is easy to have harmful substances, rarely used for food packaging. Difficult to clean and easy to residue, do not recycle.
No. 4: LDPE (low-density polyethylene), everywhere you see plastic bags made of LDPE, high-temperature harmful substances, toxic substances with food into the human body, may cause breast cancer, birth defects in newborns and other diseases.
No. 5: PP (polypropylene), used to manufacture buckets, trash cans, baskets, baskets and microwave food containers and so on. With a melting point of 167°C, it is the only plastic box that can be put into a microwave oven and can be reused after careful cleaning. It should be noted that some microwaveable food containers have a body made of #5 PP. But the lid of the box is made of #1 PE, because PE can not withstand high temperatures, so it can not be put into the microwave oven together with the box.
No. 6: PS (polystyrene), due to low water absorption, mostly used in the manufacture of building materials, toys, stationery, tumblers, and fast food store cups and boxes of drinks or disposable tableware. It should not be put in the microwave oven, as it may release chemicals due to high temperatures. Load acid (such as orange juice), alkaline substances, will decompose carcinogenic substances, avoid packing hot food with fast food containers.
pc material is a few number of plastic 2A, plastic PC is what material
1, plastic PC is also a type of plastic, but it is a polycarbonate plastic, basically colorless, showing transparent, belonging to an amorphous thermoplastic material. However, its strength is very high, heat resistance is also very good, has a certain impact resistance, with flame retardant effect.
2, according to its composition, without additives, can achieve the role of flame retardant, so it is more widely used in daily life, such as the lenses of the glasses we carry or drink cups of water, bulletproof glass, including goggles, and automotive headlamps, are made of this PC plastic, which is only hard material.
Second, what are the types of plastic division
1, there are many types of plastic, there is a kind of plastic belonging to the ABS, which indicates that the increase in the resin component, some synthetic, some natural. In addition to this there is a kind of PVC, I believe that many people are very familiar with the plastic products of PVC, it is the production of the 2nd place, is the most widely used type.
2, the PVC itself belongs to the colorless and transparent, is also a hard material, but compared with the PC material, its hardness is slightly lower, it will be a lot of brittle, transparency is not as good as the PC. mechanical properties and PC compared to the difference is also very far, but if the PVC inside the increase of plasticizers, will be made into soft materials. For example, it can be made into pipes or plastic windows, including daily life, the use of bank cards, will be made of hard PVC.
3, if you distinguish from its price, PVC products are cheaper than PC, about half or only a quarter of it, so compared in daily life, the industrial range is most widely used.
pc material is a number of plastic 3
What are the advantages of pc material?
1, with high strength and coefficient of elasticity, high impact strength, a wide range of operating temperatures.
2, highly transparent and free coloring.
3, low molding shrinkage, good dimensional stability.
4. Good fatigue resistance.
5, good weather resistance.
6, excellent electrical characteristics.
7, tasteless and odorless, harmless to the human body in line with health and safety.
What are the applications of pc plastic?
1, electrical and electronic: polycarbonate is an excellent insulating material for the manufacture of insulated connectors, coil frames, tube holders, insulated bushings, telephone shells and parts, battery shells for lamps and so on.
2, mechanical equipment: used in the manufacture of a variety of gears, rack, worm gear, worm, bearings, cams, bolts, levers, crankshafts, ratchets, can also be used for a number of mechanical equipment shells, covers and frames and other parts.
3, medical equipment: cups, cylinders, bottles for medical purposes, as well as dental instruments, pharmaceutical containers and surgical instruments, and can even be used as artificial kidneys, artificial lungs and other artificial organs.
4, other aspects: the building used as hollow rib double-wall panels, greenhouse glass, etc.; used in the textile industry as textile yarn tube, textile machine tiles, etc.; daily use for bottles, tableware, toys, models, LED lights shell and cell phone shells and so on.
1. Plasticizers
Plasticizers can increase the softness of the plastic, elongation, plasticity, reduce the flow temperature of the plastic and hardness, is conducive to the molding of plastic products. Commonly used are benzene dicarboxylic acid esters, sebacate esters, chlorinated paraffins and camphor. Our most common is camphor.
2. Stabilizers
We all know that plastic products in the processing, storage and use of process, in the light, heat, the role of oxygen, will occur under the action of fading, embrittlement, cracking of the aging phenomenon. In order to delay and prevent the occurrence of aging phenomenon, it is necessary to add stabilizers. Mainly used to prevent thermal aging, called heat stabilizer; mainly used to prevent oxidative aging .
Today's best performing plastic stabilizers are methyltin heat stabilizers (181 for short), which are very effective in calendering, extrusion, injection and blow molding of rigid polyethylene (PVC). Because of its high safety, it is especially used in food packaging and high-definition rigid polyethylene products, and at the same time, it is also commonly used in plastic doors and windows, water pipes, decorative materials to replace other highly toxic plastic heat stabilizers.
It has been widely used in the United States, Europe, Japan. In recent years, 181methyltin heat stabilizer began to be used in large quantities in China.
3. Flame retardants
The additives that can improve the flame resistance of plastics are called flame retardants. Most of the plastics containing flame retardants are self-extinguishing, or the burning rate is slowed down. Commonly used flame retardants are antimony oxide and aluminum, boron compounds, halides and phosphate esters, tetrachlorobenzene dicarboxylic anhydride, tetra-O-benzene dicarboxylic anhydride and so on.
4. Antistatic agents
Antistatic agents play a role in eliminating or reducing static electricity generated on the surface of plastic products. Most of the antistatic agents are electrolytes, they are limited compatibility with synthetic resins, so that they can migrate to the surface of the plastic to achieve moisture absorption and eliminate the role of static electricity.
5. Foaming agent
Plastic foaming agent is a low molecular organic matter can be vaporized at a certain temperature, such as dichlorodifluoromethane; or heat will decompose out of the gas organic compounds. These gases remain in the plastic matrix to form a number of fine foam structure of the foam. Commonly used azo compounds, nitroso compounds and so on.
6. colorants
Colorants are used for coloring plastics. Mainly play a beautifying, modifying role. About 80% of plastic products are made after coloring the final product.
7. lubricant
lubricant is to improve the plastic heating molding molding and improve the surface finish of the products and add substances. Commonly used lubricants are: stearic acid and its salts, paraffin wax, synthetic wax and so on.
8. reinforcing materials and fillers
In many plastics, reinforcing materials and fillers account for a considerable proportion, especially reinforced plastic and calcium plastic materials. The main purpose is: in order to improve the strength and rigidity of plastic products, generally adding a variety of fiber materials or inorganic substances. The most commonly used reinforcing materials are: glass fiber, asbestos, quartz, carbon black, silicate, calcium carbonate, metal oxides and so on.