[[TitleIndustry]]

TPU related knowledge you ask me to answer

Date:Feb 04, 2020

From RainbowTPU


Q: What is the full name of TPU?

A: Thermoplastic Polyurethane.

 

Q: What is the difference between TPU and PU?

A: The full name of polyurethane is polyurethane, which is a high molecular compound containing —NHCOO— unit in its molecular structure.

—N = C = O + HOˉ → --NH-COOˉ

PU In the 1970s, Otto Bayer in Germany first synthesized PU. Around 1950, PU appeared in Europe as a textile finishing agent, but mostly solvent-based products for dry coating finishing. In the 1960s, due to the enhancement of people's environmental awareness and the promulgation of government environmental protection regulations, water-based PU coatings came into being. After the 1970s, water-based PU coatings developed rapidly, and PU-coated fabrics have been widely used. Since the 1980s, breakthroughs have been made in PU research and application technology. Compared with foreign countries, domestic research on PU textile finishing agents is relatively late.

Polyurethane coating agent is the main type of development today, and its advantages are:

Ø The coating is soft and elastic;

Ø The coating has good strength and can be used for very thin coatings;

Ø The coating is porous, with moisture permeability and air permeability;

Ø Wear-resistant, wet-resistant and dry-cleaning resistant.

PU coating agents are classified according to their composition: polyester polyurethane; polyether polyurethane; aromatic isocyanate polyurethane; aliphatic isocyanate polyurethane. Divided into solvents and water based on the medium used

 

TPU's full name: Thermoplastic Elastomer Polyester Copolymer. It is an environmentally friendly and non-toxic new material. TPU can be divided into two categories: polyester and polyether. Broadly, TPU will be the product of replacing PVC. . . . This material can soften under certain heat, but can remain unchanged at normal temperature.

 

Q: What is the molecular structure of TPU?

A: It is a linear polymer material produced by the reaction of diisocyanate, macromolecular polyol, and chain extender. It is characterized by repeating urethane groups in the molecular composition, and it also contains urethane, Diurea, and other groups such as ester bond and ether bond; from the perspective of molecular structure, it is composed of rigid segments and flexible segments alternately.The rigid segments are obtained by the reaction of diisocyanate and chain extender. The segment is obtained by the reaction of diisocyanate and macromolecular polyol. This special molecular structure makes TPU have other types of thermoplastic elastomers with unparalleled excellent properties.

 

Q: What are the main characteristics of TPU?

A: 1. High abrasion resistance 2. Wide hardness range 3. High mechanical strength 4. Outstanding cold resistance 5. Good processing performance ...


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