Transformer blister It is a kind of plastic processing technology. It is used to heat and soften flat hard plastic sheets, absorb them on the mold surface by vacuum, cool them and form them. It is widely used in plastic packaging, lighting, advertising, decoration and other industries.

At present, the packaging of electronic products without shell such as transformers is generally aluminum mold packaging. The step is to first set up a number of small aluminum molds, then put the products to be packaged into the aluminum mold for epoxy filling, and then demould.

The double-layer plastic tray consists of a complete set of combined plastic tray with a top cover and a bottom support with a lock and a foldable coaming. The top cover and the bottom support are made of HDPE. Double layer disposable blister technology is used for molding. The center coaming can be made of PP (polypropylene resin) plastic hollow board or seven layer corrugated cardboard into a foldable coaming.

The raw material of blister products is only plastic sheet, and the film thickness is generally not more than 1.5 mm. The commonly used sheet materials are PVC, PET, PP, PS, as well as flocking sheet, gold-plated sheet and anti-static sheet on this basis.

The commonly used blister material of PVC is soft, strong in toughness and good in plasticity. It can be made into transparent and various colors. Transparent PVC is commonly used to package products such as electronics, cosmetics, toys and gifts.

PET (A-PET) is hard, good toughness, high strength, bright surface, environmentally friendly, non-toxic, transparent and multi color sheet. The disadvantage is that PET high cycle heat sealing is difficult and the price is much more expensive than PVC. This material is often replaced by products and environmental protection users.