Is there a difference between polyester and polyester?

- 2021-12-28-

                     

In the purchase of time, some materials are often easy to cause the attention of some friends, such as: polyester and polyester fiber these two, clear friends will say that this is a kind of material, unclear friends wonder why the same material has a different name?

Is there a difference between polyester and polyester?


By name

Polyester fiber is the international common name, mainly because of the earliest production commodity name and famous, now become the international common name;

Dacron is the Chinese name, where polyester is usually called dacron.

From this point it is clear that they are no different.

Polyester is introduced

Usually refers to the polycondensation of diacid and dialcohol from the polymer compound, including all the molecular chain containing more than 85% of the linear macromolecules of diol p-phthalate composed of fibers.

There are many varieties of polyester fiber, three kinds are given in GB/T4146.1-2009, which are polyethylene terephthalate (PET) fiber, polybutylene terephthalate (PBT) fiber and polypropylene terephthalate (PTT) fiber. Among them, PET fiber in China's commodity name polyester, visible, polyester is only a kind of polyester fiber. Polyester due to its reactants, excellent performance, the development so far as in chemical fiber production is the largest and the most widely used fiber, also is so, people mistakenly think polyester fiber is polyester, however, in recent years, with the improvement of fiber production process, the polyester fiber is increasing the PBT and PTT two new members.

PTT fiber has both the characteristics of polyester and polyamide, which is easy to wash, quick to dry, good elastic recovery, and has better wear resistance and tensile recovery, and is more suitable for the production of composite fiber, elastic fabric, carpet and other materials. In addition to the advantages of polyester, PBT fiber also has better dyeing performance, and has become one of the differentiated fibers with promising development in the field of synthetic fiber. In addition, it also has better aging resistance, chemical reaction resistance and heat resistance, so that it is widely used in engineering plastics, home appliance shell and other fields. The emergence of these two new polyester fibers has not only broken the dominant situation of polyester fibers, but may even replace it within a certain range.

With the advent of PTT fiber and PBT fiber, polyester is no longer the exclusive domain of polyester. However, in practical detection, because these three fibers are difficult to be distinguished by ordinary methods, in theory, they can be identified by combining infrared spectroscopy and melting point method, but the identification process is also difficult. Therefore, according to the standard GB/T 4146.1-2009, the "polyester fiber" report will be issued under normal circumstances, and only when the client clearly requires, and the sample can be determined to be "polyethylene terephthalate (PET)", the testing agency can be identified as "polyester".

                    

Polyester is introduced

Dacron (commonly known as dacron). Polyester is the simplest of the three, and relatively cheap. In addition, it has strong and durable, good elasticity, not easy deformation, corrosion resistance, insulation, crisp, easy to wash and dry, and other characteristics, loved by people.

Polyester fiber, textile fiber raw material is the most important synthetic fiber varieties, with terephthalic acid (PTA) or dimethyl terephthalate (DMT) and ethylene glycol (EG) as raw material through esterification and ester exchange and polycondensation reaction of polymer - polyethylene terephthalate (PET), the spinning and aftertreatment fibers.

Melt-spinning method is generally adopted, and the shape structure observed in the microscope has a circular section and no special longitudinal structure.