Installation of new injection stretch blow moulding production lines means Spectra can confidently meet market needs. The company’s standardised machines produce outstanding quality PET containers in a variety of sizes from 25ml up to 500ml capacities. What's more, a number of stylish finishes, including frosted PET, can also be achieved, while a range of colouring options is virtually limitless.

Strong yet lightweight, Spectra’s extensive PET range offers robust barrier properties for product protection and superb glass-like clarity which is perfect for displaying products in their best light. PET also has the added environmental benefits of being more readily recycled, a major consideration for both Spectra and its customers. Spectra can also go one step further by moulding from recycled PET.

What is injection stretch Blowmoulding?

Injection Stretch Blow Moulding is the process of manufacturing high quality and very high clarity bottles. The plastic is melted and then injected into a mould to form a preform. The preform is then pre heated before being held inside two halves of a mould.

When the preform is inside it is then inflated using high pressured air while simultaneously being stretched. While the plastic is inside the cavity, the plastic will freeze off to the desired shape as it is forced against the inside walls. The mould halves will then open releasing the bottle so that the process can be repeated.

What are the benefits of PET as a material?

PET (Polyethylene Terephthalate) is ideal as an alternative to glass bottles, offering a number of packaging advantages such as excellent clarity, as well as barrier characteristics against carbon dioxide and oxygen. With PET lighter weight bottles can be made and this material has a High breakage resistance to avoid risk and injury. PET is also suitable for recycling.