How to distinguish and choose between PET vacuum bags and Nylon vacuum bags?

This is the problem that many customers will encounter when choosing a vacuum bag, Now let me answer it for you next.

First study from their material:

PET is commonly known as polyester, polyethylene terephthalate (PET), the chemical formula is (C10H8O4)n, it is transesterified by dimethyl terephthalate and ethylene glycol or by terephthalic acid and ethylene glycol Esterification firstly synthesizes bishydroxyethyl terephthalate, and then conducts polycondensation reaction to obtain it. It is a crystalline saturated polyester with a milky white or yellowish color, a highly crystalline polymer with a smooth and glossy surface.

It has excellent physical and mechanical properties in a wide temperature range, the long-term use temperature can reach 134℃, and the electrical insulation is excellent. Even at high temperature and high frequency, its electrical properties are still good, but the corona resistance is poor, and the Creep, fatigue resistance, friction resistance and dimensional stability are all good.

The advantages of PET material are reflected in the following points:

1. It has good mechanical properties, the impact strength is 3 to 5 times that of other films, and the folding resistance is good.

2. Oil resistance, fat resistance, dilute acid, dilute alkali, and most solvents.

3. It can be used for a long time in the temperature range of 55-60℃ and can withstand the high temperature of 65℃ in short-term use and low temperature of -70℃, Strong temperature adaptability.

4. The permeability of gas and water vapor is low, and it has excellent gas barrier, water, oil, and odor properties.

5. Wonderful transparency, can block UV rays and have great gloss.

6. No harmful substances and pungent odor, healthy and safe, food-grade material, can be directly used in food packaging.

Nylon, namely polyamide, English name Polyamide (PA), is a general term for thermoplastic resins containing repeating amide groups - [NHCO] - on the main chain of the molecule, including aliphatic PA, aliphatic-aromatic PA, and aromatic PAPA. Among them, aliphatic PA has many varieties, large output and wide application, and its name is determined by the specific number of carbon atoms of the synthetic monomer. It was invented by the famous American chemist Carothers and his research group. The most prominent advantage of nylon is that it has higher abrasion resistance than all other fibers.

The advantages of nylon material are reflected in the following points:

1. High mechanical strength, good toughness, and high tensile and compressive strength. The tensile strength is close to the yield strength, more than double that of ABS. The ability to absorb shock and stress vibration is strong, and the impact strength is much higher than that of ordinary plastics, and is better than that of acetal

2. Outstanding fatigue resistance, the parts can still maintain the original mechanical strength after repeated inflections many times.

3. Strong heat resistance and not easy to deform.

4. Smooth surface, small friction coefficient, wear-resistant. When used as a moving mechanical component, it has self-lubricating properties, low noise, and can be used without lubricant when the friction effect is not too high; if it is really necessary to use a lubricant to reduce friction or help dissipate he.

Next, check and distinguish from the appearance:

PET vacuum bags are more transparent than nylon vacuum bags.

Finally, you can also identify by hand touch:

Compared with PET vacuum bags, nylon vacuum bags are softer, and nylon vacuum bags have better ductility and are easy to stretch.

About selection:

Consider the budget: if the budget is small, you can choose PET vacuum bags, the price is lower than nylon vacuum bags.

Consider packaging items: if packing hard items, it is recommended to use nylon vacuum bags.

Thanks for watching, hope this article helps you!