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Time:2022-08-25 11:07:55 Views:
No.1 Plastic: Say No to cheap
Plastic is probably the most widely used material for laptops since their birth, but the word "plastic" sounds too low-end and cheap, so the industry has given them a more academic name - "PC+ABS engineering plastics".
ABS engineering plastic is PC+ABS, this material not only has excellent heat resistance, and impact resistance of PC resin, but also has the excellent easy processing of ABS resin. It has obvious advantages, strong plasticity, rich color, simple processing, and low cost.
Give the plastic texture
The advantage of PC+ABS engineering plastics is that the cost is relatively low and easy to shape, you can freely develop a variety of edges and corners, streamline, and three-dimensional appearance modeling. But, PLASTIC IS PLASTIC, AGAIN HOW TOSS, ALSO DIFFICULT to mask the cheap sex ON ITS SIMPLE SENSE AND tactile FEELING.
Therefore, to enhance the appearance of the notebook manufacturers will usually the engineering plastic surface for a second "decoration".
A favorite decoration technique for early plastic notebooks was to coat the surface with "piano paint" (or "crystal diamond color" as some brands call it), giving the notebook a color that was purer and brighter, with a ceramic-like touch.
Then, the notebook's favorite decoration technology is replaced by the "IMR (in-mold transfer) process", providing a ceramic touch at the same time, but also letting the notebook shell surface bring metal wire drawing, concentric circles, frosts, patterns, and other personality texture, it can be said that "what kind of what kind".
Now many games look at the use of metal wire shells, but in fact, the shell is still engineering plastic, just through the surface of the wire texture and coating process to achieve the texture and luster of the metal, this is the charm of plastic material.
A misunderstanding about plastic
Compared with metal materials, the texture and strength of engineering plastics are at a disadvantage, but their toughness and wear resistance performance is more excellent: they will not deform when slightly squeezed and knocked, and the trace, when scratched by foreign bodies, is lighter (its risk stems from the possibility of fracture when subjected to large forces). Despite all this, many users misunderstand that engineering plastics are not as good as a metal for heat dissipation.
Notebook cooling covered 95% relied on the CPU/GPU chip on the surface of the heat sink, heat pipe, fan, and cooling fins "suit", only a very small part of the (mainly used in the extremely frivolous super and PC tablet seal equipment) may use graphite patch lead to the metal case to increase the cooling area.
For the overall calorific value of the notebook, the heat guided by this part is almost negligible. Instead, it is not as good as directly using the book pad at the back of the notebook to enhance the air circulation rate of the bottom heat dissipation hole.
No2 metal: More upscale spokesmen
Compared with plastic, metal material has an inherent delicate texture and cold touch, so it is often used in notebooks to enhance the sense of a must-kill technology. The metal notebook shell is divided into aluminum magnesium alloy, magnesium alloy, and titanium alloy three parts.
Aluminum and magnesium alloys
The main element of an aluminum-magnesium alloy is aluminum, with a small amount of magnesium mixed, and the magnesium content is between 3-5%. It is widely used in the manufacture of high-end doors and Windows, various parts of transportation tools, and the manufacture of middle-grade notebook shells, etc.
Aluminum magnesium alloy has the advantages of strong compression resistance, easy coloring, light weight, and good heat dissipation. The disadvantage of an aluminum-magnesium alloy is the difficulty of forming and the high cost.
Magnesium alloy
If the magnesium metal content is larger, it is called "magnesium aluminum alloy". The main component of magnesium and aluminum alloy is magnesium, accounting for 90%, followed by aluminum, accounting for 9%, and zinc, 1%. Magnesium and aluminum alloys are mainly used in the automotive industry (70%), 3C industry (20%), and military and aerospace (10%).
Magnesium aluminum alloy has the advantages of good heat dissipation, lightweight, strong compressive resistance, good processing, and the least density of engineering metals; Disadvantages Compared with aluminum and magnesium alloy, the cost is high, the forming difficulty is added, and the corrosion resistance is poor.
Titanium alloy
Titanium alloy can be said to be the upgraded version of aluminum magnesium alloy. The main element is still aluminum, but trace titanium metal is added to enhance toughness. Titanium alloy is mainly used to make aircraft engine parts, followed by rocket, missile structural parts, in the medical instrument has also been promoted, and the use of titanium magnesium alloy as a notebook shell also infiltrated carbon fiber material, so that the hardness is further strengthened.
Obvious advantages, ultra-high strength toughness, more thin, better heat dissipation, automatic repair. But the corresponding process is also complicated and the cost is very high.
Metals also need seasoning
In order to improve the metal texture, the notebook with this material is most like to introduce the drawing process on the surface, that is, the aluminum plate is repeatedly scraped out of the line (including straight lines, random lines, thread ripples, concentric circles, etc.), which can clearly show every tiny wire marks, thus greatly improving the three-dimensional feeling and feel of the metal surface.
At the same time, to protect the metal, the anodic oxidation coloring process is also the most commonly used later optimization of notebooks, that is, in aluminum and aluminum alloy surface coloring to improve the appearance level, transform a layer of oxide film, to improve corrosion resistance, enhance wear resistance and hardness, protect the metal surface and other effects.
It is worth mentioning that now there are many metal notebooks on the surface with "skin coating", the principle is to melt chlorinated rubber or PU and other materials in the solvent, become a liquid, and then evenly spray paint on the laptop shell, to be solvent evaporation and formation of the coating.
As the name suggests, skin-like coatings have the advantage of making the metal feel like skin, and can also play a role in scratch prevention and temperature isolation to a certain extent.
Even metal is troubled
No matter what kind of alloy materials, as a metal branch they also have similar problems. First of all, although the strength of metal is high, but the toughness is very poor, casual knock is easy to leave obvious knock marks in the corner, once due to extrusion and deformation, there is no possibility of recovery.
Secondly, metal does not wear better than plastic, especially when the bright edges are cut by CNC process, which can easily leave small scratches. If the metal surface is not coated, it will also show obvious marks when it is scratched by a sharp object.
Finally, metals are very sensitive to heat and cold, absorb heat quickly and lose heat quickly. Winter if the notebook just from the outdoors to use the surface will be very cold hands, summer for a long time to play games on the surface and easy to hot. Therefore, pay attention to some high-end notebook, usually in the metal surface to add skin or some heat insulation coating, to avoid temperature caused by tactile disgust.
No3 carbon fiber: not metal is better than metal
High-end laptops such as ThinkPads and Dell XPS often feature 'carbon fiber' as one of their main selling points, and the material has unwittingly become the preserve of high-end and top-end notebooks.
Composite carbon fiber material is divided into: glass fiber and carbon fiber.
It is made of glass by high temperature melting, wire drawing and other processes. Its main components are silicon dioxide, alumina, calcium oxide, boron oxide, magnesium oxide, sodium oxide and so on are widely used in aerospace, automobile and train manufacturing, household appliances and electronic products.
Advantages are high strength, non-flammability, corrosion resistance, good heat resistance, easy processing, high elasticity coefficient.
The disadvantage is brittle texture, general wear resistance.
Carbon fiber is a new type of fiber material with high strength and high modulus of carbon content more than 95%. There are several different grades of Carbon fiber: 200-300 gigabahertz for automotive engines, and 500-600 gigabahertz for aerospace. It's worth mentioning that the ThinkPad X1 Carbon is made of top-of-the-range Carbon fiber, which is stronger than 500 gigabahertz.
The advantages of carbon fiber are high strength and toughness, lighter than metal alloys, the best heat dissipation material, and good electrical conductivity.
However, the disadvantages are also obvious. The so-called high strength of carbon fiber is mainly manifested in the high tensile strength and tensile modulus, but it is a brittle material with poor toughness.
Therefore, carbon fiber is not suitable as a structural material, in the notebook field is mostly used for top cover, palm support and bottom cover, need to match metal or plastic material skeleton support. In addition, the appearance of carbon fiber is monotonous lack of variation, coloring difficulty, high cost and slight leakage of inductance hidden danger (process defects), it is difficult to be widely used in the notebook field.
In the course of notebook development, there were also Dura aluminum, titanium alloy, FC-GF polycarbonate, leather and even bamboo and other special materials, but they are not popular because of cost or process reasons.
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