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In the field of preform mould design and manufacturing, PET preforms and PVC preforms are two common materials, each with unique properties and a wide range of application scenarios. Foshan Heyan Mould Co., Ltd., as a leader in preform mould factories, has a deep understanding and rich experience in these two materials. The following is a detailed comparison of PET preforms and PVC preforms from the aspects of material form and properties, hardness and toughness, use and environmental protection.
1. Material form and properties
PVC, that is, polyvinyl chloride, is a slightly yellow translucent and shiny material. It is a widely used heat shrink label film material in the market because of its low cost. , good transparency, and moderate shrinkage (generally between 40% and 60%) are highly favored. However, PVC has high requirements for heat sources and needs to be within a specific temperature range to achieve the ideal shrinkage effect.
In contrast, PET, or polyethylene terephthalate, has become the preferred material for manufacturing bottles with complex geometric shapes due to its excellent transparency, high shrinkage (up to 80%), and relatively flat temperature-shrinkage changes. The surface of PET bottle embryos is smooth and shiny, showing a very high sense of quality.
2. Material hardness and toughness
PVC materials can be divided into soft and hard polyvinyl chloride according to the amount of additives used. Soft products are soft and tough, and feel sticky, while hard products have a higher hardness than low-density polyethylene, but lower than polypropylene. This The material shows a certain flexibility in hardness and toughness, but there is still a certain gap compared to PET.
PET material is known for its strength and toughness that are superior to polystyrene and polyvinyl chloride. It is not easy to break, and has good creep resistance, fatigue resistance, friction resistance and dimensional stability. Low wear and high hardness make PET show unique toughness among thermoplastics. Therefore, PET bottle embryos can maintain high precision and stability during the manufacturing process.
3. Uses
PVC plastics are widely used in plates, pipes, soles, toys, doors and windows, wire sheaths, stationery and other fields due to their low cost and convenient processing. In addition, PVC is also commonly used in transparent and various colored blister materials for packaging electronics, cosmetics, toys and gifts and other products. However, In the field of preform manufacturing, the application of PVC is relatively small.
PET preforms are mainly used to make plastic bottles, such as beverage bottles, oil barrels, etc. As a professional preform mold factory, Foshan Heyan Mould produces PET preform molds with high precision and stable quality, which can meet the needs of different customers. PET preforms are non-toxic, weather-resistant, chemical-resistant, low in water absorption, and resistant to weak acids and organic solvents, making them widely used in food, beverages, medicine and other fields.
IV. Environmental protection
In terms of environmental protection, PVC materials release toxic hydrogen chloride gas when burned, which pollutes the environment. Therefore, in some countries, the use of PVC materials is restricted or prohibited. In contrast, PET preforms are considered to be a relatively environmentally friendly material. It can be recycled and reused to reduce resource waste. At the same time, PET does not release harmful substances under normal use conditions and is harmless to the environment and human health.
In summary, there are significant differences between PET preforms and PVC preforms in terms of material properties, hardness and toughness, uses and environmental protection. As a professional preform mold factory, Foshan Heyan Mould Co., Ltd. is committed to providing customers with high-quality PET preform molds and customized solutions. When choosing preform materials, customers should decide based on specific application scenarios and needs. Foshan Heyan Mould will always adhere to the principle of "quality first, customer first" to provide customers with better quality and more efficient services.
Foshan Heyan Precision Mould Technology Co., Ltd.'s main business is preform moulds, bottle blowing moulds, bottle cap moulds and other products. It has a strong engineering, R&D, technology and sales team, advanced processing equipment and rich project experience. If you want to know more or have special needs, please call 13318345050, or add our WhatsApp.
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