Application of PETG in Cosmetic Plastic Packaging Injection Molding Factories
The most commonly used materials in cosmetic injection molding factories are PETG, AS, and ABS. The HUIWEN Plastics editor will focus on the application of PETG in cosmetic injection molding factories.
1. What is PETG and Its Characteristics
PETG is a transparent plastic and an amorphous copolyester. Its common comonomer is 1,4-cyclohexanedimethanol (CHDM). It is a polycondensation product of terephthalic acid (PTA), ethylene glycol (EG), and 1,4-cyclohexanedimethanol (CHDM) using the transesterification process. Compared to PET, PETG contains more 1,4-cyclohexanedimethanol comonomer, while compared to PCT, it contains more ethylene glycol comonomer. Therefore, the properties of PETG differ significantly from those of PET and PCT. PETG is an amorphous copolyester. As the CHDM content in the copolymer increases, its melting point decreases, its glass transition temperature increases, and its crystallinity decreases, ultimately forming an amorphous polymer. Generally, the CHDM content in PETG is optimally between 30% and 40%.
It exhibits excellent viscosity, transparency, color, chemical resistance, and stress whitening resistance. It can be quickly thermoformed or extrusion blow molded. Its viscosity is superior to that of acrylic. PETG is an amorphous copolyester. Its products are highly transparent and have excellent impact resistance, making it particularly suitable for forming thick-walled, transparent products. Its excellent processability allows for arbitrary shapes to be designed to meet the designer's requirements. It can be molded using traditional methods such as extrusion, injection molding, blow molding, and vacuum forming. It is widely used in sheet materials, high-performance shrink film, bottles, profiles, and cosmetic packaging. It also has excellent secondary processing properties and can undergo conventional machining and modification.
II. Applications of PETG in the Cosmetic Packaging Industry
PETG offers glass-like transparency and density, excellent gloss, chemical and impact resistance, and is easy to process. It can be injection molded, injection-stretch-blow molded, and extrusion-blow molded. Unique shapes, appearances, and special effects can be created, such as vibrant colors, matte finishes, marble textures, and metallic lusters. Overmolding with other polyesters, elastomeric plastics, or ABS is also possible.
Products include lip gloss tubes, cosmetic bottles and caps, lipstick tubes, cosmetic cases, deodorant packaging, talcum powder bottles, and eyeliner cases. They offer excellent clarity, gloss, toughness, processability, and colorability.
PETG is a highly transparent copolyester plastic. It features high transparency, good toughness and impact strength, excellent low-temperature toughness, chemical resistance, high tear resistance, and good processability. It can be processed using traditional molding methods, including extrusion, injection molding, blow molding, and blister molding. Besides its use in cosmetics injection molding plants, PETG can also be used in food, pharmaceutical, and cosmetic packaging.
