What is the material of pu sole (what is the material of pu sole? )

Polyurethane is the abbreviation of polyurethane, and its English name is polyurethane, also known as PU.

It is a polymer with repeated structural units of carbamate chain segments, which is made by the reaction of isocyanate and polyol.

It is a kind of polymer material, which is foamed from A/B/C polyester and can be divided into oily and water-based materials.

It is a new type of organic polymer material, known as "the fifth largest plastic", which is mostly used to make high-grade leather shoes, sports shoes and travel shoes.

Polyurethane bottom?

Compared with ordinary rubber soles, polyurethane soles have the characteristics of light weight and good wear resistance.

It uses polyurethane resin as the main raw material, which solves the problems that domestic plastic soles and recycled rubber soles are easy to break and rubber soles are easy to open.

By adding various additives, the wear resistance, oil resistance, electrical insulation, antistatic property and acid and alkali resistance of polyurethane soles have been greatly improved.

Characteristics of polyurethane sole

Low density, soft texture, good elasticity, comfortable and light to wear;

Stickiness and comfort are better than rubber sole and tendon sole;

Good dimensional stability and long storage period;

Good wear resistance and deflection resistance, high hardness;

Excellent shock absorption and anti-skid performance;

Good temperature resistance;

Good chemical resistance;

Easy to corrode, conducive to environmental protection, not easy to wrinkle and so on.

Properties of polyurethane base material

1. Polyurethane soles will form various bubbles in production, and have the characteristics of elasticity, light weight, wear resistance, folding resistance, oil resistance, chemical resistance and corrosion resistance.

PU shoe materials based on microporous polyurethane elastomer are soft to the touch, comfortable and warm, elastic, shockproof and antiskid.

2. Polyurethane soles are divided into encryption type and foaming type.

Encrypted polyurethane sole is light, moderate in hardness, handmade, wear-resistant, durable, easy to maintain and difficult to break.

Foamed polyurethane base is naturally soft because of its few components, but it is not wear-resistant and difficult to open. Once opened, it can't be repaired.

3. Polyurethane soles are widely used in the production of casual shoes, sports shoes, work shoes, sandals, travel shoes, leather shoes for men and women, protective shoes, etc.

Adhesive is used to bond polyurethane soles and uppers together, because it is light, and the degumming rate is lower than that of rubber soles.

4. Polyurethane soles are divided into high, middle and low ends.

High-density polyurethane soles have strict requirements from formulation to technology to production, and the shelf life of shoes after leaving the factory is as long as 5 years.

Most of the shoes with this sole are high-grade shoes.

The shelf life of polyurethane soles for middle and low-priced shoes is about half a year.

This kind of sole is not glued, but sewn, and its durability is not as good as the former. Wear it for a long time and it will break like tofu residue.

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Editor: Zukang Technology

Source: Network (invasion and deletion)

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