20 plastic basics knowledge you need to know

- Dec 25, 2019-

1, how to identify PVC plastic, PVC can be recycled granulation?

PVC Chinese name: polyvinyl chloride.Combustion identification, softening or melting temperature range: 75~90°C;Combustion: hard to soften;Burning flame state: yellow and green with smoke;After leaving the fire situation: from the fire extinguished;Odor: pungent and sour.Solvent: tetrahydrofuran, cyclohexanone, methyl ketone, dimethyl formamide;Non-solvent: methanol, acetone, heptane.It can be regenerated and granulated.The recycling process of PVC mainly includes the following 6 steps:

(1) pretreatment of PVC waste

(2) selective dissolution in a mixed solvent

(3) separation of insoluble substances

(4) precipitation of recycled PVC

(5) drying treatment

(6) solvent recovery and recycling

PET Deli Containers

2. What is the use of ethylene propylene rubber?

Epdm rubber has ternary and binary epdm rubber, general purpose: all molded products;General purpose rubber hose and heat-resistant rubber hose in automobile;Manufacturing electrical components;Because of its excellent extrusion performance, it can be blended with high viscosity rubber to improve its extrusion performance.

3. LL0412 LL0501 LL0503 LL0504 LL0505 represents which manufacturer and what model?

LL stands for LLDPE;The last four digits represent the time of delivery, the first two represent the year, and the last two represent the month.For example, LL0505 means LLDPE, delivery month May 2005.And so on.

4. I want to run a recycled plastic pellet factory, but I don't know what kind of materials those woven bags are made of, such as PP and aBS.

PP is generally used to make woven bags;ABS has strong rigidity and is generally used for shell, parts and so on.

5. Which plastics can withstand high temperatures?Can withstand temperatures in excess of 200 degrees?

Ptfe can meet the above requirements.In addition, high temperature resistant special engineering plastic fluoroplastics, silicone, polyether imine, polyether ether ketone, liquid crystal polymer, etc.Modified nylon, can withstand more than 250 degrees of high temperature.

6. What are the properties of PS plastics and aBS plastics?

PS plastics (polystyrene), material performance: excellent electrical insulation (especially high frequency insulation), colorless and transparent, light transmittance second only to organic glass, color resistance to water, good chemical stability, strength, but brittle, easy to produce stress brittle crack, not resistant to benzene.Organic solvents such as gasoline.Suitable for making insulating transparent parts.Decorative parts and chemical instruments, optical instruments and other parts.Molding performance:

Amorphous material, moisture absorption is small, do not have to fully dry, not easy to decompose, but the coefficient of thermal expansion is large, easy to produce internal stress.Good fluidity, can use screw or plunger injection machine molding;

Heart-shaped plastic packing box

High material temperature, high mold temperature, low injection pressure, prolonged injection time is conducive to reduce the internal stress, to prevent shrinkage, deformation;

Available in various forms of gate, gate and plastic parts arc connection, so as to avoid damage to the gate plastic parts.Large Angle of ejection, even ejection.Plastic wall thickness uniform, had better not take insert, if insert should be preheated.

ABS (acrylonitrile - butadiene - styrene), light yellow granular or beaded opaque resin, non-toxic, tasteless, low water absorption.Excellent physical and mechanical properties, excellent low temperature impact resistance, excellent electrical properties, wear resistance, dimensional stability, chemical resistance, dyeing.Easy to process and shape.ABS is resistant to water, inorganic salts, bases and acids, insoluble in most alcohol and hydrocarbon solvents, and soluble in aldehydes, ketones, esters and some chlorinated hydrocarbons.

The disadvantages of aBS are flammability, low thermal deformation temperature and poor weather resistance.Combustion characteristics: flammable;Keep burning away from the fire;Flame yellow, thick black smoke;Soften, foaming;Acrylonitrile.

Solubility: soluble solvent: dichloromethane;Insoluble solvent: alcohol, aliphatic hydrocarbon, water. Application: automobile industry, mechanical equipment, electronic appliances, etc.

7. What PP material is used in the syringe?Can you recycle it?

The PP material used in the syringe is called random copolymerization PP, which can be recycled.Waste syringes are medical waste, especially to avoid harm.Do not use recycled materials, because it is easy to cause medical errors.

8. Use, price and treatment technology of waste PET?

Applications: recycled pet is mainly used for fiber, sheet material, non-food packaging bottles, etc. The development of applications include: building materials, food packaging and containers, etc. Japanese companies have used polymer alloy improvement technology to process recycled pet into powder coatings with better performance than those made with new pet materials.

Price: no open quotation, basically a single proposal.

Treatment process: dimethyl terephthalate (dimethyl terephthalate) and EG(ethylene glycol) recycling method from waste PET bottles has been developed by tiren corporation of Japan. The waste PET bottles are first crushed and cleaned, then dissolved in EG. The PET is depolymerized at the boiling point temperature of EG and the pressure of 0.1mpa to produce hydroxyethyl terephthalate (BHET).After filtration, the filter residue and additives were removed, so that BHET reacted with methanol, and DMT and EG were generated by transesterification at the boiling temperature of methanol and pressure of 0.1mpa.After distillation, DMT and EG were separated, and then the DMT was refined by recrystallization.EG is purified by distillation and methanol can be recycled.The recovered DMT and EG are both 99.99 per cent pure and the cost of production is comparable to that of the generic DMT and EG methods.DMT can be converted into pure TPa(terephthalic acid) for use in the manufacture of bottle grade PET resins.The circulator can produce about 10 percent of the raw material the company USES to make the resin.plastic clamshell packaging box

9. How are waste plastics classified?

The commonly used waste plastics are generally divided into PE, PP, PVC, PET, EPS, aBS, Pa, etc.Among them, PE has plastic greenhouse material, industrial packaging film, lactic acid beverage bottles, detergent bottles, etc.PP has woven bags, packing belt, bundling rope, part of the car bumper, PVC has plastic doors and Windows profile, pipe, etc.There are coke, Sprite and other tea bottles.EPS is commonly known as styrofoam.

10, the chemical name of waste plastic, and all kinds of waste plastic into particles can do what plastic products?For example, what can be done when a mineral water bottle is made into granules?What's its chemical name?What can be done when woven bags are made into particles?

Thermoplastic products can be recycled and then granulated, called recycled plastics.In theory, its use is slightly narrower than new materials.Because of the recycling technology level and the particularity of the use of finished products: such as food packaging, medical treatment, etc. (in order to avoid the harm to human body, such products do not need raw materials).However, advanced recycling technology and strict recycling system in developed countries have made the performance of recycled materials close to that of new materials, and even through this property, synthesis and so on, new USES can be developed.Domestic technology is backward, and so far, recycled plastic particles have not issued enterprise standards or national standards.Therefore, the quality of plastic recycled material is uneven, its use should be determined according to its specific technical indicators.

11. What are the specific USES of ptfe?

Polytetrafluoroethylene (PTFE) is commonly known as plastic king, is the largest production and consumption of fluoroplastic varieties, accounting for about 70% of the total fluoroplastic output, used in chemical, machinery, electrical, construction, electronics, automotive and many other fields.

12. What about PPR?

PPR pipe products are suitable for industrial and civil buildings, life, health drinking water supply and hot water heating system, is the replacement of copper pipe and galvanized pipe upgrade products, can be used for: 1.2. Water purification and pure water pipelines;3. Transportation and discharge of industrial water and chemical substances;4. Hot water circulation system;5. Compressed air pipe;6. Food and beverage production and delivery system;7. Other industrial and agricultural tubes.

What kind of plastic is used for springs?

The main properties of spring plastic: 1. The deformation energy V value should be large (that is, the spring modulus E value should be small); 2.2. High strength, especially fatigue strength;3. The deformation energy V value of thermosetting fiber reinforced plastics (FRP) is larger than that of ordinary metals, which can be compared with spring steel;And its high strength, stress unidirectional distribution, is the ideal material for manufacturing plate spring.

14, abs.ps.PP.PE and other material characteristics of the main use and the difference between the labels

ABS has good rigidity, high impact strength, heat resistance, low temperature resistance, chemical resistance, good mechanical strength and electrical performance, easy processing, processing size stability and good surface gloss, easy coating, coloring, but also can be sprayed metal, electroplating, welding and bonding secondary processing performance.

Main applications: automotive, appliance, electronics/electrical appliances, building materials, PS/aBS alloy blend electrical insulation good (especially high frequency insulation), colorless, transparent, light transmittance after organic glass, shading sex water resistance, good chemical stability, strength, but qualitative fragile, easy to produce stress brittle, not resistant to benzene, gasoline and other organic solvents.Suitable for making insulating transparent parts, decorative parts and chemical instruments, optical instruments and other parts.

PE is basically divided into three categories, namely high pressure low density polyethylene (LDPE), high density polyethylene (HDPE) and linear low density polyethylene (LLDPE).Film is its main processing products, followed by sheet and coating, bottles, cans, barrels and other hollow containers and other injection and blow molding products, pipe and wire, cable insulation and sheath.Mainly used in packaging, agriculture and transportation sectors.

Pp is cheap, light, highly processable and versatile, and the development of catalysts and new processes has further expanded the range of applications. "as long as a product's material is replaced by plastic, it has the potential to use polypropylene," says one.Main applications: woven bags, tarps, consumer durables: such as cars, home appliances and carpets.

15, PC commonly used products which several,VCD disc and packaging box is what plastic do?

Polycarbonate (PC) material has the advantages of light weight, transparency, high strength, seismic resistance and good processing performance.PC products application has penetrated into cars, architecture, medicine, clothing and other industries, PC lamp, PC skylight, car light wave transducer for optical fiber communication system of, transparent canopy roof, PC board, PC injection tube, in addition, the swimming pool at the bottom of the lighting system, solar collecting system, high-definition television screen, can be carried out in textile fabric material identification chip tag fiber are integral to some new fields such as PC material, PC products are contribute to all walks of life, its potential applications will also get further development.The compact disc is the most familiar area for PC applications, and it is moving toward mass storage, with the new DVD expected to have a storage capacity of 100 gigabytes.

16. PC performance

High impact strength, good size stability, colorless and transparent, good color, good electrical insulation, corrosion resistance, wear resistance, but poor grease, stress cracking tendency, high temperature easy hydrolysis, poor compatibility with other resins.