General Plastic Industries

DO's
1. Study how long your preform supplier is in business.
2. Does the PET preform supplier have low-cost machines or branded machines?
3. It is also important to check whether the PETpreform supplier has a dehumidifier or not.
4. How experienced PET preform supplier’s operator is?

DONT's
1. Don’t choose a PET preform supplier based on price.
2. Don’t choose a PET Preform supplier who uses recycled PET resin which is not FDA compliant.
3. Don’t buy PET preforms that are yellow or brownish even if they are cheaper.
4. Do not choose a PET preform supplier if he is offering you a lower-priced PET preform but a higher weight.

https://generalplasticindustries.com/how-to-choose-pet-preform-supplier-manufacturer/

Branded machines ensure continuous production with consistent quality. Toshiba injection molding machines or Ferromatik machines are examples of branded machines. A lot of manufacturers use low-quality Chinese and Indian Machines which produce thin and uneven PET preform which will directly impact while Blowing the preform into bottles. Below are some images of high-quality PET preform Machines.

Your PET preform manufacturer must have the right instruments to check the quality of the preforms. He should be knowledgeable. He must use a Polarizer to detect defects and wall thickness of PET preforms.

Many PET preform suppliers mix Recycled pet (RPET) with virgin PET material to reduce cost. This degrades the quality of the PET preform. In this process, a harmful chemical called acetaldehyde (AA) gets released. This AA residue is not suitable for consumption.

Acetaldehyde(AA) is a by-product of the PET manufacturing process. It is produced when PET is heated to a high temperature to produce bottles. Many beverages and foodstuffs contain natural acetaldehyde.

The quantities of acetaldehyde that may migrate from PET into bottled water are harmless, although they may cause the water to have a slightly fruity off-taste. The consumer may be able to taste it when the concentration exceeds 0.02 mg of acetaldehyde per liter or more than 3 ppm of AA.

Based on consumer’s acceptance and local regulation, this is something that should be avoided in some countries whereas it is well accepted in others. PET bottle manufacturers have worked closely with the bottled water companies to optimize the PET bottle production process to minimize levels of acetaldehyde migration.