What is the impact of using poor quality PET braided sleeve products?

PET Braided Sleeve are commonly used in steel, aluminum alloy, and plastic doors and windows to install seals between glass and door and window frames. PET braided sleeve are usually made of modified polyvinyl chloride material.

The performance of Pet Braided Sleeve largely affects the airtightness, watertightness, heat loss and other important performance indicators of doors and windows and the firmness of doors and windows. For this reason, the country formulated the national standard GB12002-89 "PET Braided Sleeve for plastic doors and windows" very early. To standardize the production and inspection of PET Braided Sleeve.
However, the quality and price of PET Braided Sleeve for doors and windows in the building materials market are very confusing. The expensive ones are 15,000 to 6,000 yuan a ton, and the cheap ones are only 6,000 yuan a ton. The price difference is nearly 10,000 yuan, and the quality varies greatly, which makes people feel at a loss. Many PET Braided Sleeve manufacturers claim that their products comply with the national standard GB12002-89, and can issue test reports qualified by authoritative organizations. According to the testing of the PET Braided Sleeve of well-known manufacturers currently in use in the industry and the samples of PET Braided Sleeve sent by relevant manufacturers, the results of the heating weight loss index in the hot air aging performance item are surprising: more than 10 samples, unexpectedly None are qualified.
According to the GB12002-89 standard, the heating weight loss index in the hot air aging performance item of PET Braided Sleeve should be ≤ 3%. The heating weight loss of the actual test results is: 7.17% to 22.54%. Far beyond the scope of national standards.
For such PET Braided Sleeve, a large amount of low-boiling point plasticizers or plasticizer substitutes are added to the formula. Such PET Braided Sleeve are still very elastic and soft when they are new. However, over time, when the plasticizer volatilizes more, the elasticity and softness of the PET braided sleeve will deteriorate, which will affect the sealing performance of doors and windows, and affect the firmness of door and window assembly in severe cases.