How to make PC materials, and which products are PC materials generally used in

Answer: The performance of a notebook mainly depends on three points: 1

Look at workmanship. 2.Look at the structure.

3.Look at the configuration. The first one looks at workmanship.

In terms of workmanship, it is the screen material and the body material. The best in this regard is, of course, Lenovo's ThinkPad too. It is also because of the materials used that the ThinkPad can be the best computer in the world.

The second thing is to look at the structure, how well the internal structure is designed, which is the main criterion for the quality of this computer. The rationality of the structural design is a test for the company's R&D department. Of course, the best design here is still none other than the ThinkPad!

The heat dissipation of the little black is very good, and it also benefits from its structural design. Of course, the ThinkPad is synonymous with quality, a guarantee of stability, and a status symbol!! The third one is to look at the configuration.

What kind of computer has a high configuration and a low configuration**? That's Shenzhou. Buying the highest configuration with the lowest ** is the characteristic of Shenzhou.

But after all, the workmanship is a bit poor, so it affects the reputation of the brand. So if you want to buy a computer, I still recommend you to buy a thinkpad!! And a lot of Lenovo's IdeaPad series is also very good.

Good workmanship of the heat sink rod. The after-sales service is also top-notch. If you are a high-end designer, it is recommended that you buy the ThinkPad W series or T series, and the W series is for professional engineers.

**More than 30,000 yuan. The T series is more than 1000000 and is a high-end business jet.

I don't understand the meaning, how to do it, is it asking about the processing temperature or what.

It can be injection molded, extruded, molded, blow molded, thermoformed, printed, bonded, coated, and machined, with the most important processing method being injection molding. It must be pre-dried before molding, the moisture content should be lower, the processing of trace moisture at high temperature will make the product produce white turbidity, silver filaments and bubbles, PC has a considerable ability to force high elastic deformation at room temperature. Since it has high impact toughness, it can be cold-formed, cold-drawn, cold-rolled, etc.

The molecular weight of PC for extrusion should be greater than 30,000, and a gradient compression screw should be used, with a length-diameter ratio of 1:18 24 and a compression ratio of 1:, and high-quality and highly transparent bottles can be formed by extrusion blow molding, injection-blowing, injection-pulling-blowing.

2.Polycarbonate is mainly used in the production of industrial products, used to replace metals and other alloys, and is used as impact-resistant and high-strength parts in the machinery industry. Glass fiber reinforced polycarbonate has metal-like properties and can replace die castings such as copper, zinc, aluminum, etc.

Polycarbonate can be used in injection molding, extrusion molding, blow molding, rotational molding, vacuum forming, and solvent casting diaphragm technologies. The parts can also be machined, punched, sawed, welded and glued at room temperature. Injection molding of polycarbonate resin is generally carried out using a screw injection machine.

Barrel temperature: 250 320, injection pressure: 50 80MPa, mold temperature:

85 120, screw speed: 40 60 times, finished product heat treatment: first bake in the oven of 100 105 for 10 minutes, and then bake for another 30 minutes at 120 125, and naturally cool to room temperature.

PC (polycarbonate) is an engineering thermoplastic with high mechanical, optical, electrical and thermal properties. This extremely tough, easy-to-process polymer is suitable for a wide range of applications: for example, in household appliances, automotive lamps, medical devices, and packaging containers.

OQ resins have contributed to the development of the optical disc industry.

The above is not wrong, but there are also wall switches, sockets, power strips, and other products.

Characteristics of PC material:

1. Mechanical properties: high strength, fatigue resistance, dimensional stability, creep is also small (there is little change under high temperature conditions);

2. Heat aging resistance: the enhanced UL temperature index is 120 140 (outdoor long-term aging is also very good);

3. Solvent resistance: no stress cracking;

4. Water stability: easy to decompose when exposed to water at high temperature (caution should be used in high temperature and high humidity environment);

5. Insulation performance: excellent (humidity and high temperature can also maintain stable electrical properties, which is an ideal material for manufacturing electronic and electrical parts);

6. Dielectric coefficient: ;

7. Arc resistance: 120s;

8. Molding processability: injection molding or extrusion of ordinary equipment.

1. It has high strength and elastic coefficient, high impact strength, and a wide range of operating temperatures;

2. High transparency and free dyeing;

3. Low forming shrinkage and good dimensional stability;

4. Good fatigue resistance;

5. Good weather resistance;

6. Excellent electrical characteristics;

7. Tasteless, odorless, harmless to the human body, in line with health and safety;

8. Mechanical properties: high strength, fatigue resistance, dimensional stability, small creep;

9. Heat aging resistance: the enhanced UL temperature index reaches 120 140;

10. Solvent resistance: no stress cracking;

11. Stability to water: easy to decompose when exposed to water at high temperature.

Polycarbonate (PC).

Properties: Amorphous thermoplastic.

Advantages 1. High strength and elasticity coefficient, high impact strength, wide range of operating temperatures 2, high transparency and free dyeing.

3. High 4. Good fatigue resistance.

5. Good weather resistance;

6. Excellent electrical characteristics;

7. Tasteless, odorless, harmless to the human body, in line with health and safety;

8. Low forming shrinkage and good dimensional stability.

Disadvantages: Poor design of molded products is prone to internal stress problems.

Uses Electronic and electrical appliances: CD sheets, switches, home appliance shells, signal tubes, ** motor vehicles: bumpers, distribution panels, safety glass industrial parts: camera bodies, implement shells, safety helmets, diving goggles, safety lenses.

Polycarbonate, abbreviated as PC, is a colorless, transparent, amorphous thermoplastic material.

Physical properties: Polycarbonate is colorless and transparent, heat-resistant, impact-resistant, flame-retardant, and has good mechanical properties in ordinary use temperatures.

Polycarbonate, abbreviated as PC, is a colorless, transparent, and amorphous thermoplastic material.

Chemical properties. Resistant to acids and oils. Not resistant to ultraviolet light, not resistant to strong alkalis.

PC material. Very demanding for dry conditions. Very brittle, should start with dry conditions.

1. PC material is very sensitive to moisture because of water molecules.

It has the effect of cutting off the molecular chain of PC material, so it is brittle in appearance. Its drying conditions are in the dehumidifier.

Dry at 120 degrees for 4 hours. And note that after drying, it cannot be placed in the air for 15minOtherwise, you'll need to start over.

2. Here, PC material is a material that is more sensitive to stress, and it is not good for it to cover large traces and small nozzles. It is advisable to increase the nozzle as much as possible to make it shear stressed.

Smaller. 3. If the problem cannot be solved, it is recommended to thicken the wall thickness under possible conditions. The results of impact tests can be improved.

Advantages: 1. High strength and elastic coefficient, high impact strength, wide range of operating temperatures.

2. High transparency and free dyeing;

3. High. 4. Macro and good fatigue resistance.

5. Good weather resistance;

6. Excellent electrical characteristics;

7. Tasteless, odorless, harmless to the human body, in line with the safety of Wei imitation grip.

8. Low forming shrinkage and good dimensional stability.

Disadvantages: Poor design of molded products is prone to internal stress problems.

PC material is very harsh for drying conditions. You said that it is very brittle, and I think it should be said that the material is very sensitive to moisture from the drying conditions, because the water molecules have a cutting effect on the molecular chain of the PC material, so it is brittle in appearance. His chop was dried for 4 hours under a 120-degree strip on a dehumidifier.

And note that after drying, it cannot be placed in the air for 15minOtherwise, you'll need to start over. 2。

Here, PC material is a material that is more sensitive to stress, so it is not good for him to be blind at the small water mouth. It is recommended to enlarge the nozzle as much as possible to reduce its shear stress. 3. If the problem cannot be solved, it is recommended to thicken the wall thickness under possible conditions.

The results of impact tests can be improved.

It was preliminarily determined that it was the cause of the material, and the fluidity was not very good, but it would not break. Now the only question is that the welding money is serious! This may be the reason for the poor fluidity of the PC of this fissile culture type. Do you have any suggestions?

The test effect of changing to another model is much better, very hard! The problem now is that the water streak is severe, and it may be necessary to increase the nozzle and mold temperature.

Polycarbonate (PC).

Polycarbonate is a transparent, strong, heat-resistant plastic. In particular, the impact strength is high, which is among the best in plastics, and the creep resistance is good, even at 120 degrees Celsius. Therefore, it is widely used as an industrial plastic.

However, it is slightly less resistant to chemicals and is not resistant to alkalis, strong acids and aromatic hydrocarbons. Polycarbonate is suitable for injection molding, extrusion, blow molding, and other processing.

Polyester (PET PBT).

The commonly used polyester is polyethylene terephthalate (PET), which is prepared by the polycondensation reaction of terephthalic acid and ethylene glycol, and is also the raw material for the production of polyester fibers. This polyester has heat resistance and good abrasion resistance, and has a certain strength and excellent impermeability. Biaxially oriented films made of polyethylene terephthalate are widely used in audio tapes, films and photographic films.

Biaxially oriented blow molded bottles are often used as containers for carbonated beverages due to their transparency and carbon dioxide opaqueness.

PE, the full name is polyethylene, is the simplest structure of polymer organic compounds, the most widely used polymer materials in the world today, made of ethylene polymerization, according to the different densities of high-density polyethylene, medium-density polyethylene and low-density polyethylene.

Low-density polyethylene is softer and mostly polymerized with high pressure; High-density polyethylene has the characteristics of rigidity, hardness and mechanical strength, and is mostly polymerized at low pressure. High-density polyethylene can be used as containers, pipes, and high-frequency electrical insulating materials for radar and television. Low-density (high-pressure) polyethylene is often used in large quantities.

Polyethylene is waxy, has a wax-like smoothness, and when not stained, low-density polyethylene is transparent, while high-density polyethylene is opaque, and polyethylene is a high-polymerization chain connected by repeated CH2 units through the addition reaction and polymerization reaction of ethylene (CH2=CH2). The properties of polyethylene depend on how it polymerizes; High-density polyethylene (HDPE) is produced by Ziegler-natta polymerization under conditions catalyzed by organic compounds at moderate pressures (15-30 atm). Under these conditions, the polymerized polyethylene molecules are linear and have long molecular chains, with molecular weights as high as hundreds of thousands.

In the case of radical polymerization at high pressure (100-300 MPa), high temperature (190 210 C), peroxide-catalyzed conditions, low-density polyethylene (LDPE) is produced, which is branched.

Farewell two songs, one (Du Mu).

Characteristics of PC material:

1. Mechanical properties: high strength, fatigue resistance, dimensional stability, creep is also small (there is little change under high temperature conditions);

2. Heat aging resistance: the enhanced UL temperature index is 120 140 (outdoor long-term aging is also very good);

3. Solvent resistance: no stress cracking;

4. Water stability: easy to decompose when exposed to water at high temperature (caution should be used in high temperature and high humidity environment);

5. Insulation performance: excellent (humidity and high temperature can also maintain stable electrical properties, which is an ideal material for manufacturing electronic and electrical parts);

6. Dielectric coefficient: ;

7. Arc resistance: 120s;

8. Molding processability: injection molding or extrusion of ordinary equipment.