TERMOFORMING AND VACUUMFORMING
Simply explained, the process starts with a plastic film which is 0,20-2mm in thickness. This film is heated and then formed over a cooled mold. The packages then continues through a punch tool and stacked up where the operator pack the product in a carton. The process is very simple and has acted like this since it was invented in the early 1900's, though, they had no proper material for forming then. First on -60 century materials became so flexible that it was going to start an industrial scale.
INP Thermal Moulds or vacuum molds, depending on the product. Thermoforming or AIR FORMING mostly used as a faster method to shape the products. Vacuum molding is used when it’s deeper products to get a more even forming. Often, we use both to optimize the speed of the machines.
Today, sold a large part of all the food in different types of packaging. Plastic is the material most commonly used in direct contact with food.
INP currently using 95% of PET and 5% PS. Polyetentereftalat PET is the material well known and will only be carbon dioxide and water upon combustion.
More about PET: http://www.naturskyddsforeningen.se/info-om-plast
There are many different types of plastics and it is often difficult to recognize a particular type of plastic in packaging. Recycling symbols, for example a triangle with a figure inside, specifies only the main resin in the product. The label of "glass and fork" symbol or the word "food" is used on all materials to show that the material is safe to use for food.
The substances that make plastic soft, such as phthalates and adipates, was debated intensely during the 80s in Sweden. The reason is that phthalates may possibly affect the ability to have children.
Moreover conducted much of plasticisers of food, for example, from plastic film of polyvinyl chloride (PVC) for fatty foods. The problem has declined in recent years, partly because PVC is used to a lesser degree, and partly because the film without plasticizer used to a greater extent.
Our most common plastics
A plastic material is usually composed of a so-called polymer and various additives. A polymer composed of a long chain of like molecules, monomers, for example ethylene, styrene or vinyl chloride. The additives, such as plasticizers, stabilizers, antistatic agents and dyes, are used to affect the properties of the plastic. Additives are also used in the plastic to aid in the preparation.