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Industry knowledge of PET Material

Industry knowledge of PET Material


Q1: What is PET?

A1: PET full name is Polyethylene terephthalate, commonly known as polyester resin. General performance PET resin for the milky white translucent or colorless transparent body, the relative density of 1.38, light transmittance of 90%. PET is a medium barrier material, the permeability coefficient of O2 is 50 ~ 90cm3 • mm / (m2 • d • MPa), the transmittance coefficient of CO2 is 180cm3 • mm / (m2 • d • MPa). Polyethylene terephthalate (sometimes written poly(ethylene terephthalate)), commonly abbreviated PET, PETE, or the obsolete PETP or PET-P, is the most common thermoplastic polymer resin of thepolyester family and is used in fibers for clothing, containers for liquids and foods, thermoforming for manufacturing, and in combination with glass fiber for engineering resins.It may also be referred to by the brand name Dacron; in Britain, Terylene;[4] or, in Russia and the former Soviet Union, Lavsan.The majority of the world's PET production is for synthetic fibers (in excess of 60%), with bottle production accounting for about 30% of global demand.[5] In the context of textile applications, PET is referred to by its common name, polyester, whereas the acronym PET is generally used in relation to packaging. Polyester makes up about 18% of world polymer production and is the fourth-most-produced polymer; polyethylene (PE), polypropylene (PP) and polyvinyl chloride (PVC) are first, second and third, respectively.

PET consists of polymerized units of the monomer ethylene terephthalate, with repeating (C10H8O4) units. PET is commonly recycled, and has the number "1" as its Resin Identification Code (RIC).Depending on its processing and thermal history, polyethylene terephthalate may exist both as an amorphous (transparent) and as a semi-crystalline polymer. The semicrystalline material might appear transparent (particle size less than 500 nm) or opaque and white (particle size up to a few micrometers) depending on its crystal structure and particle size.The monomer bis(2-hydroxyethyl) terephthalate can be synthesized by the esterification reaction between terephthalic acid and ethylene glycol with water as a byproduct, or by transesterificationreaction between ethylene glycol and dimethyl terephthalate (DMT) with methanol as a byproduct. Polymerization is through a polycondensation reaction of the monomers (done immediately after esterification/transesterification) with water as the byproduct.

Q2: What are the characteristics of PET plastic bottles?

A2: PET plastic molecular structure is highly symmetrical, with a certain degree of crystal orientation, and therefore has a high film-forming and forming. PET plastic has good optical properties and weatherability, amorphous PET plastic has good optical transparency.

Q3: What are the advantages of PET plastic bottles?

A3: PET plastic in addition with excellent wear resistance of friction and dimensional stability and electrical insulation. PET made of bottles with high strength, good transparency, non-toxic, anti-penetration, light weight. Weather resistance, chemical stability, water absorption is low, resistant to weak acid and organic solvents, but not resistant to hot water immersion, not alkali.

Q4: How do I identify other ingredients?

A4: The smell of PET material is different from other plastic material. When it is burning, the smell is very aromatic and comfortable. If the PET contains other ingredients, the taste is very pungent. A kind of bottle containing SEBS ingredients can not be used.

Q5: Is PET plastic bottles environmentally friendly and recyclable?

A5: PET is environmentally friendly materials, recyclable. But there will be tear and ware during production, so that we need to prepare more spare parts.

Q6: What are the main uses?

A6: Because PET is an excellent water and moisture barrier material, plastic bottles made from PET are widely used for juice, lotion, face cream, shampoo, shower gel, laundry detergent, kitchen cleaner, etc.

1.Film sheet: all kinds of food, medicine, non-toxic and sterile packaging materials; textile, precision instruments, electrical components of high-grade packaging materials; tapes, video, film, computer floppy, Photographic film and other materials; electrical insulation materials, capacitor film, flexible printed circuit boards and membrane switches and other electronic fields and machinery.

2. Application of the bottle: its application has been from the initial development of carbonated drinks to the current beer bottles, edible oil bottles, condiment bottles, bottles, cosmetics bottles and so on.

3. Electronic appliances: manufacturing connectors, coil bobbin, integrated circuit shell, capacitor shell, transformer shell, TV accessories, tuners, switches, timer housings, automatic fuses, motor brackets and relays.

4. Automotive accessories: such as power supply disk cover, fire coil, all kinds of valves, exhaust parts, distributor cover, measuring instrument cover, small motor shell, etc., can also use PET excellent coating, surface gloss and rigidity, Manufacture of exterior parts for cars.

5. Mechanical equipment: manufacturing gears, cams, pump housings, pulleys, motor frames and watch parts, can also be used as microwave oven baking pan, all kinds of roof, outdoor billboards and models.

6.Pet plastic molding processing can be injection molding, extrusion, blow molding, coating, bonding, machining, electroplating, vacuum plating metal, printing.

Q7: Is there a limit to the product shape?

A7: PET product are made from the bottle preform, which can not make complicated shape, such as handle, sharp angle, etc. The max neck size can be 38mm, the max width can be 120mm and the max height can be 250mm. PET plastic bottle type can only do the ordinary shape, such as round, square, flat, etc., can not do with the handle of the bottle; bottle angle for the arc type, can not do sharp right angle type.

Q8: Which kind of colors can I do for PET plastic bottles?

A8: PET plastic bottles can be transparent, also can be colorful as semi-transparent, or opaque based on customer’s Pantone Number in mass production.

Q9: Is there any limits to specification of PET plastic bottles?

A9: The max capacity of PET plastic bottle is 2L, and the max dimension is L120mm*W100mm*H250mm. The neck size of PET plastic bottle is 18mm, 20mm, 24mm, 28mm, 32mm, 38mm, 48mm. We can also customize the special neck size based on customer’s detailed requests.

Q10: How to distinguish this is PET products?

A10: The bottom of the blow molded PET product is a point, and the number within the triangle symbol is 1.

Q11: What are the processing methods?

A11: PET plastic bottles are suitable for thermoplastic forming a variety of molding process, forming a good processing, such as injection molding, blow molding and so on.

Q12: Which kinds of crafts can be done for PET plastic bottles?

A12: We can do engraving, painting, silk screen printing, hot stamping, labeling, shrink film and so on.

Q13: Is PET plastic bottle possible to electroplating?

A13: PET plastic bottle can be electroplated.

Q14: What’s the package for PET plastic bottles?

A14: PET bottles are packed and delivered by cartons and individual small PP bags. The small PP bags used to prevent any scratchs of the PET bottle surface.

Q15: What is the production process for PET?

A15: Preform -> heating -> pre-blow -> molding.

Q16: What’s the supply ability of PET products?

A16: 8000pcs/Line/Day.