In mid 2018, a cable customer in the Philippines, who purchased some aluminum polyester film from a factory, and about 30 days after placing the order, the customer received the goods and immediately arranged for production on the machine. However, it didn’t take long for the workers to reflect to the production supervisor that the material was always easy to break after the machine, which took too much time for the workers and increased the scrap rate of the product, and lost most of the material, while a large number of quality problems appeared in the produced product, which was complained by the end customer.
It is obvious that this batch of materials has quality problems, so that customers have suffered losses, so what quality problems are likely to occur in the process of buying aluminum polyester film?
The quality problems that can occur in the process of buying aluminum polyester film are
（1) The side cutting surface of the aluminum polyester film is uneven at high and low levels.
（2) The surface of the aluminum polyester film has a grainy feeling or obvious folds.
（3）The tensile strength and elongation of the aluminum polyester film are not enough and easy to break.
（4) The aluminum layer of the aluminum polyester film is easy to fall off and oxidized by moisture.
How do these quality problems arise, what are the effects of these problems on customers, and what methods can we use to detect the quality of products when we buy them to avoid buying unqualified products?
1. How do the quality problems of aluminum polyester film arise?
(1) raw materials: raw materials are one of the important reasons to determine the quality of aluminum polyester film, the main raw materials of aluminum polyester film is aluminum foil and PET, if the quality of PET is not qualified, bad tensile strength, aluminum foil moisture oxidation, surface pinhole exceeds the standard, will directly affect the bonding strength and tensile strength of composite film and other issues.
(2) adhesive: glue to determine the bonding strength of composite film, high-quality glue can greatly strengthen the composite strength of aluminum polyester film, so that the aluminum foil and film can be firmly bonded together, in addition to the composite, the temperature and time of the material into the oven is also particularly important.
(3) production environment: material production compounding process, the environment in the ash layer and impurities too much, thus fleeing into the production machine, resulting in the surface of the compound to produce a sense of granularity, affecting the appearance of the product and flatness.
4) Workers’ operation: The whole production process of aluminum polyester film includes compounding, drying, slitting and packaging, the temperature, time, tension and other factors involved will directly and indirectly affect the quality of the composite film, so the production process of aluminum polyester film should be strictly controlled.
2. What is the impact of the quality of aluminum polyester film on customers?
Aluminum polyester with quality problems will consume workers’ operating time, increase the scrap rate of products in the production process, and bring huge economic losses if the unqualified products are brought into the market.
3. What methods can be used to detect the quality of the products when buying aluminum polyester film to avoid buying unqualified products?
(1) Naked eye observation: observe whether the aluminum foil section is neat, whether the surface is flat, whether there is a sense of grain and wrinkles, and whether there will be aluminum powder off the surface of the aluminum polyester film by hand rubbing.
(2) Machine testing: test the tensile strength and elongation of the aluminum polyester film with a tensile machine to see if it is qualified, or ask the manufacturer to provide a test report if there is no testing equipment.
4. Which certificate manufacturers have, the quality of the aluminum polyester film is worthy of recognition? For export-oriented manufacturers, manufacturers must have the relevant import and export rights, according to the requirements of different countries on the environment, manufacturers could provide Reach , Rohs and other test reports, customers with flame retardant requirements, manufacturers could also provide an aluminum polyester film flame retardant test report, while each batch of goods exported, with the relevant product test reports.
