“Preform” usually refers to the original molded part of a plastic bottle, which can also be called prefabricated preform or preform. In the production of plastic bottles, the preform is formed by filling the raw materials into the gun molding the mold at a specific temperature and pressure, and is formed under the working conditions of the injection molding machine. It is made by injection molding or blow molding process. Molding and assembling of bottle-shaped products. These preforms are usually stored and transported in a simple bottle shape, waiting for subsequent processing steps.
● Purpose
Bottle preforms are products processed by injection molding and are intermediates. After blow molding, they become end products. End products include plastic bottles, oil barrels, cosmetic boxes, plastic shampoo bottles, spray bottles, and other packaging containers, which are necessary for people’s daily needs. product.
● Material
PVC: The most commonly used blister material, soft, tough, and plastic, can be made transparent and in various colors. Transparent PVC is often used to package electronics, cosmetics, toys, gifts, and other products.
PET: hard, good toughness, high strength, bright surface, environmentally friendly and non-toxic, with transparent and multi-color sheets. The disadvantage is that high-frequency heat sealing of PET is more difficult and the price is much more expensive than PVC. This material is often used by users who require products and environmental protection to replace PVC. PET materials are generally used to make plastic bottles, food packaging boxes, etc.
PS: Low density (lightweight), environmentally friendly and non-toxic, very good plasticity, poor toughness and brittle, and cannot be made into transparent materials, so it can only be made into bottom-type blister. Because it is easy to crack, this type of blister should not be recycled
PP: The material is particularly soft, has good toughness, is environmentally friendly, non-toxic, and resistant to high temperatures. It is often made into packaging for dining utensils or other high-temperature-resistant products; however, its plasticity is poor, the processing is difficult, the surface gloss is poor, and the color will change during processing light.
