Plastic is a resin as the main ingredient, molded into a certain shape at a certain temperature and pressure, and can maintain the established shape of the polymer organic materials at room temperature.
Resin is an organic polymer that is usually transformed or melted range when heated, and has fluidity when transformed by external force, and is solid or semi-solid or liquid at room temperature, which is the most basic and the most important component of plastics. Broadly speaking, in the plastics industry as the basic material of plastic any polymer can be called resin.
Two, the classification of plastics
Plastics are not yet a precise classification, the general classification is as follows: 1. According to the physical and chemical properties of plastics thermoplastic plastics: in a specific temperature range can be repeatedly heated to soften and cooling hardening of plastics. Such as polyethylene plastic, polyvinyl chloride plastic.
Thermosetting plastics: due to heat or other conditions can be cured into a non-melting insoluble material plastic. Such as phenolic plastics, epoxy plastics.
2. According to the selection of plastics
General-purpose plastics: - generally refers to the production of large, wide range of uses, good molding, inexpensive plastics. Such as polyethylene, polypropylene, polyvinyl chloride and so on.
Engineering plastics: - generally refers to the ability to withstand a certain degree of external forces, and have good mechanical properties and dimensional stability, in high and low temperatures can still maintain its excellent performance, can be used as engineering structural parts of plastic. Such as ABS, nylon, poly alum.
Specialty plastics: - generally refers to special features (such as heat resistance, self-lubricating, etc.), applied to special requirements of the plastic. Such as fluorine plastic, silicone and so on.
3. According to the plastic molding method
Molded plastics: resin mixture for molding. Such as general thermosetting plastics.
Laminated plastics: refers to the resin-impregnated fiber fabrics, can be laminated, hot press combined and become a whole material.
Injection, extrusion and blow molding plastics: - Generally refers to resin mixes that can be melted and flowed at barrel temperature and harden rapidly in the mold. Such as general thermoplastics.
Casting plastics: can be in the absence of pressure or a little pressure, pouring in the mold can be hardened into a certain shape of the product of the liquid resin mixture. Such as MC nylon.
Reaction injection molding plastics: generally refers to the liquid raw materials, pressurized into the mold cavity, so that its reaction curing finished product. Such as polyurethane.
4. According to the plastic semi-products and products
Molding powder: also known as plastic powder, mainly from thermosetting resins (such as phenolic) and fillers, etc. by sufficiently mixed, pressed, crushed. Such as phenolic plastic powder.
Reinforced plastics: with reinforced materials and some mechanical properties than the original resin has a greater improvement in a class of plastics.
Foam: the whole of the plastic with countless microporous.
Film: generally refers to the thickness of O.25 millimeters below the flat and soft plastic products.
Three, the basic properties of plastic
1. light, high specific strength. Plastic is light, the general density of plastic are in the 0.9 ~ 2.3 g / cm 3, only steel 1 / 8 ~ 1/4, aluminum 1/2 or so, and a variety of foam density is even lower, about 0.01 ~ O.5 g / cm 3 between. Calculated according to the unit mass of the strength is called the specific strength, some reinforced plastics than the strength close to or even more than steel. For example, alloy steel, its tensile strength per unit mass of 160 MPa, while the glass fiber reinforced plastic can reach 170 ~ 400 MPa.
2. Excellent electrical insulation properties. Almost all plastics have excellent electrical insulation properties, such as very small dielectric loss and excellent arc resistance, these properties are comparable to ceramics.
3. Excellent chemical stability. General plastic chemicals such as acids and alkalis have good corrosion resistance, especially PTFE chemical resistance than gold is better, and even resistant to "aqua regia" and other highly corrosive electrolyte corrosion, known as "Plastic King".
4. Friction reduction, good wear resistance. Most plastics have excellent friction reduction, wear resistance and self-lubricating properties. Many engineering plastics manufacturing friction parts is the use of these characteristics of plastics, wear-resistant plastics in the addition of certain solid lubricants and fillers, can reduce its coefficient of friction or further improve its wear resistance.
5. light transmission and protective properties. Most plastics can be used as transparent or semi-transparent products, of which polystyrene and acrylic plastics as transparent as glass. Plexiglass chemical name for polymethyl methacrylate, can be used as aviation glass materials. Polyvinyl chloride, polyethylene, polypropylene and other plastic films have good light transmission and warmth, and are used in large quantities as agricultural films. Plastic has a variety of protective properties, so it is often used as protective clothing, such as plastic film, boxes, barrels, bottles and so on.
6. Shock absorption, excellent noise performance. Some plastics are flexible and rich in elasticity, when it is subjected to frequent external mechanical shock and vibration, internal viscous internal consumption, the mechanical energy into thermal energy, therefore, the project is used as a shock absorbing sound damping materials. For example, the bearings and teeth made of engineering plastics can reduce noise, and various kinds of foam are widely used as excellent shock absorbing and noise eliminating materials.
The excellent performance of the above plastics, so that it has a wide range of uses in industrial and agricultural production and people's daily life; it has been from the past as a substitute for metal, glass, ceramics, wood and fiber and other materials, but a leap into modern life and cutting-edge industrial indispensable materials.
However, plastics also have shortcomings. For example, heat resistance is worse than metal and other materials, general plastic can only be used at temperatures below 100 ℃, a small number of 200 ℃ or so; plastic coefficient of thermal expansion than the metal is 3 ~ 10 times larger than that of the size of the stability of the impact of the temperature change; in the role of the load, the plastic will be slow to produce viscous flow or deformation, that is, the phenomenon of creep; In addition, plastics in the atmosphere, sunlight, long-term pressure or certain quality In addition, plastic in the atmosphere, sunlight, long-term pressure or some quality role will occur under the aging, so that the performance deterioration and so on. These shortcomings of plastics more or less affect or limit its application. However, with the development of the plastics industry and plastic materials research work in-depth, these shortcomings are gradually overcome, excellent performance of novel plastics and a variety of plastic composite materials are constantly emerging.
Four, the use of plastic
Plastic has been widely used in agriculture, industry, construction, packaging, defense industry and people's daily lives in various fields.
Agriculture: a large number of plastics are used in the manufacture of mulch, seedling film, greenhouse film and irrigation pipes, fish nets, aquaculture floats and so on.
Industrial: electrical and electric industry widely use plastics to make insulating materials and encapsulation materials; in the machinery industry made of plastics drive gears, bearings, shaft tiles and many parts instead of metal products; in the chemical industry with plastics for pipelines, various containers, and other anticorrosive materials; in the construction industry for doors, windows, staircase handrails, floor tiles, ceilings, thermal and acoustic insulation boards, wallpaper, In the construction industry, plastics are used for doors, windows, stair railings, floor tiles, ceilings, heat and sound insulation boards, wallpapers, downpipes and pit pipes, decorative panels and sanitary ware.
In the defense industry and cutting-edge technology, whether it is conventional weapons, aircraft, ships, or rockets, missiles, satellites, spaceships and atomic energy industry, plastics are indispensable materials. In people's daily life, the application of plastic is more extensive, such as the market sale of plastic sandals, slippers, raincoats, handbags, children's toys, toothbrushes, soap boxes, hot water bottle shells and so on. Currently in a variety of household appliances, such as televisions, recorders, electric fans, washing machines, refrigerators, etc. has also gained wide application.
Plastic as a new packaging material, has been widely used in the field of packaging, such as a variety of hollow containers, injection molded containers (crates, containers, barrels, etc.), packaging film, woven bags, corrugated boxes, foam, strapping rope and packing tape.
Fifth, the history of the development of the plastics industry and the current situation
Early in the 19th century, people have been the use of asphalt, rosin, amber, gum and other natural resins. 1868 will be the natural cellulose nitrate, camphor as a plasticizer made of the world's first plastic varieties, known as celluloid, from the beginning of the history of the use of plastics by mankind. In 1909, the first synthetic plastic, phenolic plastic, appeared, and in 1920, a synthetic plastic, amino plastic (aniline formaldehyde plastic) was born. These two plastics at that time to promote the development of the electrical industry and instrumentation manufacturing industry played a positive role.
To the 1920s and 1930s, the emergence of alkyd resins, polyvinyl chloride, acrylates, polystyrene and polyamide and other plastics. From the 1940s to the present, with the development of science and technology and industry, the extensive development and utilization of petroleum resources, the plastics industry to obtain rapid development. Varieties of polyethylene, polypropylene, unsaturated polyester, fluoroplastics, epoxy resins, polyformaldehyde, polycarbonate, polyimide and so on. Basic knowledge of waste plastics Q & A
1, what is the PPC class of plastics, how to identify from the appearance?
Response: PPC belongs to the PP category, all known as chlorinated polypropylene, used in the manufacture of daily necessities, electrical appliances and so on.
2, I am engaged in waste plastic crushing, ``Please ask now waste plastic are some of the price (2004-11-9)?
Response: polypropylene (woven bag): 1200-1600 yuan / ton; polypropylene (tub bucket material): 2100-2600 yuan / ton; polyethylene (soft material): 2300-3300 yuan / ton; polyethylene (hard material): 2700-3800 yuan / ton; polyvinyl chloride: 2500-3100 yuan / ton; foam: 2000-3300 yuan / ton; Polyester (mineral water bottle): 5000-5800 yuan / ton; (Declaration: the data provided is for reference only, and please refer to the date of quotation.)
3, what type of raw material is used to produce HDPE gas pipe and water supply pipe?
Response: The raw materials used for the production of HDPE gas pipe and water supply pipe are PE80 and PE100
4. What kind of material is PPN?
Reply: PPN is a kind of polypropylene.
5, now the EVA with the best elasticity is which produced <2004-11-21 >? What brand? To domestic, and soft polyvinyl chloride for injection molding of what ah?
Response: Domestic EVA is basically produced in Beijing, is divided into extrusion grade 14 type (VA = 14) general-purpose film, 18 type (VA = 18) foam, and injection molding grade 5 type (VA =
5) food packaging film.
PVC for injection molding is generally Type 5 and Type 3.
6. What is the Chinese word for this plastic, PPU?
Response: PPU is thermoplastic polyurethane.
7, how can I identify PVC plastic, PVC can be recycled granulation? What way to take? How is the current recycled PVC market (2004-12-4)?
Response: 1) PVC Chinese name: polyvinyl chloride.
Burning method of identification, softening or melting temperature range: 75 ~ 90 ° C; combustion: difficult to soften; combustion flame state: on the yellow under the green with smoke; away from the fire after the situation: away from the fire is extinguished; odor: irritating acidic taste.
Solvent treatment identification, solvent: tetrahydrofuran, cyclohexanone, ketone, dimethylformamide; non-solvent: methanol, acetone, heptane.
2)It can be regenerated and granulated.
3)PVC recycling process mainly includes the following six steps:
(1) pretreatment of PVC waste; (2) selective dissolution in a mixture of solvents; (3) separation of insoluble substances; (4) precipitation of regenerated PVC;
(5) drying treatment; (6) recovery and recycling of solvents
4)Currently price is around RMB 8200/ton (2004-12-4).
8. What is the use of Ethylene Propylene Rubber?
Response: Ethylene propylene rubber has three yuan and two yuan ethylene propylene rubber, general use: all molded products; general-purpose hose and automobile internal heat-resistant hose; manufacture of electrical components; because of the excellent extrusion performance, can be mixed with high-viscosity rubber **** in order to improve its extrudability.
9, beverage bottle cap is What material to do?
Response: Generally it is made of PP (polypropylene).
10, LL0412 LL0501 LL0503 LL0504 LL0505 on behalf of which manufacturer what model?
Response: LL represents LLDPE; the last four digits represent the delivery time, the first two represent the year, the last two represent the month. For example, LL0505 indicates that the transaction variety is LLDPE, delivery month of May 2005. And so on.
11, 5000S raw materials are linear plastics?
Response: 5000S is HDPE (high-density polyethylene), not linear plastic.
12, Looking for a plastic that can withstand high temperatures . About over 200 degrees.
Response: PTFE can fulfill the above requirements.
In addition, special engineering plastics that can withstand high temperatures include fluoroplastics, silicone resins, polyetherimide, polyetheretherketone, liquid crystal polymers, and so on. Modified nylon, which can withstand high temperatures above 250 degrees.
13, ABS belongs to the modified polystyrene class?
Response: ABS is acrylonitrile-butadiene-styrene **** polymer, does not belong to the category of modified polystyrene, modified polystyrene belongs to the PS.
14, high-pressure polyethylene and low-pressure polyethylene and what is the difference between?
Response:
High-pressure polyethylene (HPPE) is low-density polyethylene (LDPE);
Low-pressure polyethylene (LPPE) is high-density polyethylene (HDPE).
15, I want to run a recycled plastic pellet factory, but I don't know what kind of material those woven bags belong to, such as PP, ABS and so on.
Response:
Generally PP is used to make woven bags; ABS is more rigid and is generally used to make shells, parts and so on.
16, Noryl SE1 GFN3 is what type of plastic raw material, what is the name?
Lexan 940 is what type of plastic raw material, what is the name? What is the price?
Response:
Lexan 940 is PC produced by General Electric Plastics, the market price is about 34,000.Noryl SE1
GFN3J is also General's, PPO, the market price is about 35,000.
17, what is the specific gravity of ABS?
Response:
ABS density in 1.05 grams per cubic centimeter or so, slightly heavier than water, with tough, hard, rigid characteristics.
18, please MSRESIN, ATRATE, TYPE is what type of plastic, what is the name, what is the price, what is produced?
Response:
MSRESIN for MS resin, is commonly used transparent plastic raw materials, general injection molding and extrusion molding, transparency close to the PMMA, used for optical components / toys / lampshade lighting / OA accessories / food containers / household appliances / building materials, etc.; mostly imported from Japan and Taiwan, the offer in the 15,500 - 18,300 or so.
19, what is the English code for waste acrylic. What is the price of scrap now?
Reply:
ACRYLIC is a special kind of organic glass.
PMMA is commonly known as plexiglass, also known as acrylic or acrylic, Hong Kong people are mostly called acrylic, is an important thermoplastic developed earlier, with better transparency, chemical stability and weather resistance, easy to dye, easy to process, beautiful appearance, has a wide range of applications in the construction industry.
Transparent acrylic scrap price is about 10,000; because of the approaching year-end, the acrylic scrap market is in a state of shortage.
20, PS material and ABS material performance difference?
Response:
PS plastic (polystyrene), material properties: electrical insulation (especially high-frequency insulation) is excellent, colorless and transparent, light transmittance is second only to Plexiglas, coloring water resistance, chemical stability, good. General strength, but brittle, easy to produce stress cracking, not resistant to benzene. Not resistant to benzene, gasoline and other organic solvents. Suitable for the production of insulating transparent parts. Decorative parts and chemical instruments. Optical instruments and other parts. Molding performance: 1. Amorphous material, small moisture absorption, do not need to be fully dried, not easy to decompose, but the coefficient of thermal expansion is large, easy to produce internal stress. Good mobility, can be used screw or plunger injection molding machine. 2. It is appropriate to use high material temperature, high mold temperature, low injection pressure, extend the injection time is conducive to reducing internal stress, to prevent shrinkage and deformation. 3. Available in various forms of gate, gate and molded parts arc connection, so as to avoid damage to the molded parts when going to the gate. Uniform wall thickness of the molded part, and even ejection of the molded part. Uniform wall thickness of the molded part, preferably without inserts, if there are inserts should be preheated. ABS (acrylonitrile-butadiene-styrene), light **** granular or bead opaque resin, non-toxic, odorless, low water absorption. It has excellent physical and mechanical properties, excellent low-temperature impact resistance, excellent electrical properties, abrasion resistance, dimensional stability, chemical resistance, coloring. Easy to process molding.ABS is resistant to water, inorganic salts, alkalis and acids, insoluble in most alcohols and hydrocarbon solvents, soluble in aldehydes, ketones, esters and some chlorinated hydrocarbons.The disadvantages of ABS are flammable, low heat distortion temperature, poor weather resistance. Combustion characteristics: flammable; away from the fire continues to burn; flame ***, thick black smoke; softening, foaming; acrylonitrile flavor. Solubility Properties:Soluble solvent:methylene chloride;Insoluble solvent:alcohols,aliphatic hydrocarbons,water. Applications:automobile industry,machinery and equipment,electronic and electrical appliances.
21, syringes with what PP material? Can it be recycled? How much does it cost per ton?
Response:
The PP material used for syringes is a kind of PP called random*** poly PP, which can be recycled, and the current price is about 13,000 including tax
The used syringes are medical wastes, and they are even used in order to avoid any harm.
Some users recommend South Korea's RP340R (MI25) or 370Y (MI18); and strongly recommend never to use recycled materials, because it is easy to cause medical accidents.
22, waste PET use, price, treatment technology?
Response:
Use: recycled pet is mainly used for fibers, sheets, bottles for non-food packaging, etc. Developed uses include: construction materials, food packaging and containers, etc. Japanese companies have used polymer alloy improvement technology to process recycled pet into powder coatings with performance superior to that of the powder coatings made from new pet materials. Price: did not check the public offer,
Basically a single negotiation.
Treatment process: Japan Teijin developed a recycling method from the waste PET bottles DMT (dimethyl terephthalate) and EG (ethylene glycol), the first waste PET bottles crushed and cleaned, and then dissolved in EG, in the boiling temperature of the EG and the pressure of 0.1MPa, the PET for depolymerization, generating bi-mono hydroxyethyl terephthalate (BHET). After filtration to remove the slag and additives, BHET reacts with methanol, and under the boiling temperature of methanol and the pressure of 0.1MPa, it undergoes an ester exchange reaction to produce DMT and EG. Then, after distillation, DMT and EG are separated, and then, through the process of recrystallization, DMT is purified; EG is purified through distillation, and the methanol can be recycled. The purity of both the recovered DMT and EG is 99.99%, and the cost of production is comparable to that of the generic DMT and EG method. DMT can be converted into pure TPA (terephthalic acid), which is used in the manufacture of bottle-grade PET resin. The recycling unit generates about 10 percent of the feedstock the company uses to produce the resin.
23. How are waste plastics classified?
Response:
Common types of waste plastics are roughly divided into PE, PP, PVC, PET, EPS, ABS, PA, etc.; among them, PE has plastic shed material, industrial packaging film, lactic acid beverage bottles, detergent bottles, etc.; PP has woven bags, baling bands, strapping ropes, and part of the automobile bumper, etc.; PVC has plastic door and window profiles, pipes, etc.; PET has Coke, Sprite, and other tea drink bottles; and PET has Coke, Sprite, and other tea drink bottles. PET has Coke, Sprite and other tea drink bottles; EPS is commonly known as Styrofoam.
24, the chemical name of waste plastics, as well as a variety of waste plastics into particles can be done after what plastic products.
For example, mineral water bottles made of granules can do what? What is its chemical name?
What can be made from woven bags?
Response:
Thermoplastic manufactured products can be recycled and re-pelletized, called recycled plastics, which are called **Recycled Material.
Theoretically, its use is slightly narrower than new material. Because of the recycling technology level and finished product use of special: such as food packaging, medical and so on (in order to avoid harm to the human body, generally such products do not use recycled materials).
But the advanced recycling technology and strict recycling system in developed countries has made the performance of recycled materials close to the new material, and even through the nature of the synthesis can be developed for new uses. Domestic technology is lagging behind, and so far, the recycled plastic pellets have not introduced enterprise standards or national standards. Therefore, the quality of plastic recycled material varies, and its use should be based on its specific technical indicators.
25, organic plastics (acrylic) what is the English code?
Response: Acrylic (ACRYLIC) is a special kind of organic glass, referred to as PMMA
26, what is the scientific name of nylon?
Reply:
Nylon is also known as PA or polyamide.
27, the kind of infusion tube used in hospitals is made of what plastic?
Reply: PVC,PE
28, the detailed use of polytetrafluoroethylene?
Response:
Polytetrafluoroethylene (PTFE) is commonly known as the king of plastics, is the largest production and use of fluorine plastic varieties, accounting for the entire production of fluorine plastics about 70%, used in chemical, mechanical, electrical, construction, electronics, automotive and other fields
29, please ask the PPR-related information? Aluminum-plastic PPR composite pipe and stainless steel PPR composite pipe.
Response:
No recent stock, so no offer for the time being.
PPR pipe products for industrial and civil buildings in life, sanitation and drinking water supply and hot water heating system, is to replace the copper pipe and galvanized pipe upgrading products, can be used for: 1 residential hot and cold water system 2 water purification, pure water pipeline 3 industrial water and chemical substances transport, discharge 4 hot water recycling system 5 compressed air pipe 6 food, beverage production and delivery system 7 other industrial, agricultural pipe.
Steel-plastic composite pipe is widely used in urban construction water supply, natural gas, petrochemical and other fields of environmental protection ideal pipe. Steel-plastic composite pipe has the double advantages of metal and plastic; high temperature and high pressure resistance, corrosion resistance; smooth inner wall of the pipe, low resistance, no scaling, non-toxic, non-polluting, anti-static, heat insulation and heat preservation, easy to cut, processing.
Aluminum-plastic composite pipe applications:
Industry: a variety of instruments, instrumentation, shielding conduit, insulated conduit, a variety of gases, liquids, medium transport pipeline.
Construction: building indoor cold, hot water, gas conduit, solar water heater hot and cold piping, low-temperature radiation, heating piping.
Agriculture: nursery, orchard, garden sprinkler irrigation pipes and other irrigation projects with pipes.
Public **** business: hot and cold water pipes for hotels and restaurants, oxygen pipes for hospitals, food transportation pipes, pipes for various air conditioners, and various pipes for ships.
30, used for spring plastic is what material?
Response:
The main demand for spring plastic performance: 1, the deformation energy V value to be large (that is, the spring modulus E value to be small) 2, strength, especially fatigue strength to be large 3, easy to process molding thermosetting fiber-reinforced plastics (FRP) deformation energy V value is larger than the general metal can be compared with the spring steel; and its strength is high, the stress is distributed in a unidirectional way, the manufacture of leaf springs is the ideal material.
31
31, ABS.PS.PP.PE and other materials, the characteristics of the main purpose and the difference between each mark.
Response:
ABS has good rigidity, high impact strength, heat resistance, low temperature resistance, chemical resistance, mechanical strength and electrical performance is excellent, easy to process, processing dimensional stability and surface gloss is good, easy to paint, coloring, but also can be sprayed with metal, plating, welding and adhesion and other secondary processing properties. Main applications: automobiles, appliances, electronics / electrical appliances, building materials, ABS alloys / **** mix PS electrical insulation (especially high-frequency insulation) is excellent, colorless and transparent, light transmittance is second only to Plexiglas, coloring resistance, water resistance, good chemical stability. General strength, but brittle, easy to produce stress cracking, not resistant to benzene. Not resistant to benzene, gasoline and other organic solvents. Suitable for the production of insulating transparent parts. Decorative parts and chemical instruments. Optical instruments and other parts. PE is basically divided into three main categories, namely, high-pressure low-density polyethylene (LDPE), high-density polyethylene (HDPE) and linear low-density polyethylene (LLDPE). Film is its main processed products, followed by sheets and coatings, bottles, cans, barrels and other hollow containers and other various injection molding and blow molding products, pipes and wires, cables, insulation and sheathing. Mainly used in packaging, agriculture and transportation sectors.
pp cheap, light, good processability and a wide range of uses, catalysts and the development of new processes to further promote the expansion of the field of application, it has been said: "as long as there is a product of the material is replaced by plastic, then this product has the potential to use polypropylene". Major applications: woven bags, tarpaulins, consumer durables: such as automobiles, home appliances and carpets.
32, PC commonly used products are those kinds of VCD disks and outer packaging box is what plastic do?
Response:
Polycarbonate (PC) material has the advantages of light weight, transparency, high strength, shock resistance and good processing performance, in the development of more than 50 years, the application areas continue to expand.
PC products have penetrated the application of automotive, construction, medical, clothing and other industries, PC lights, PC car skylights, automotive communications systems in the light wave conductor fiber optics, transparent canopy roofs, PC panels, PC injection tube, in addition to the bottom of the swimming pool, self-lighting systems, solar energy collection systems, high-definition large TV screens, textiles, textile materials can be recognized as chip marking fiber and some new Chip marking fibers in textiles and other new areas are less PC materials, PC products are contributing to all walks of life, its application potential will be further developed.
The CD-ROM is the most familiar PC application, and it is developing in the direction of high capacity, with the new DVD's storage capacity expected to reach 100 billion bytes.
33, pc performance
Response:
High impact strength, dimensional stability model, colorless and transparent, good coloring, electrical insulation, corrosion resistance, abrasion resistance, but nourishing lubrication is poor, there is a tendency to stress cracking, high temperature easy to hydrolyze, and other resins with poor compatibility.
34, China's largest recycled plastics market is that a few places?
Response:
Generally the areas where the trade of new materials is more active, the trade of recycled materials is also more active, such as Yuyao, Guangdong, Shandong and other places.
35, ACETAL (acetaldehyde diethyl acetal) commonly known as what material? What is the performance?
Response:
ACETAL is acetal, acetaldehyde diethyl acetal; commonly known as plastic steel (Hong Kong and Taiwan are called: plastic steel); can be used to do outdoor products such as buckles, high hardness, moisture-proof, can be used in cold or dry environment.
36, in 180 degrees in the non-deformation of plastic raw materials are?
Response:
Aromatic nylon can be up to 260 ℃, there are fluorine plastic, etc. can be resistant to this and other high temperatures.
37, PP powder is a universal material? Is it as universal as injection molding and wire drawing? Can it replace PP material? How much is the market price? Answer:
PP plastics are all general-purpose plastics. As long as the equipment allows, powder and granule can replace each other, the current market price is around 10200.
38, please ask the daily oil prices have Brent, WTI, OPEC oil prices are how to analyze, while oil futures high and low is how to see now after the plastic trend is high or low?
Response:
By the role of the principle of cost-push,: crude oil - naphtha - ethylene - polyethylene - plastic products, crude oil prices and plastics trend is consistent (short-term deviation is also normal), but this effect from the theory of Theoretically speaking, there should be a certain lag effect, and not like the current domestic plastics market so sensitive reaction. At present, the international oil prices on the domestic plastics market is mainly the influence of the mentality, as well as the role of a herd mentality.
When the market returns to rationality, the supply and demand of plastics itself will have a greater impact on market prices.