Knowledge

(1) Wear resistance

The wear resistance of the carpet is expressed by the number of wear resistance. That is, the number of times the carpet is ground under a fixed pressure until the backing is exposed. The more times of abrasion resistance, the better the abrasion resistance. The pros and cons of abrasion resistance are related to the material used, the length of the pile and the number of channels. Abrasion resistance is an important indicator reflecting the durability of carpets. See Table 3-2 for the relationship between wear resistance, material and pile length.

Surface layer weaving technology and materials

Hair length (mm)

Wear times (times)

Weaving

Polypropylene 10 ≥100 000

Weaving

Acrylic 10 7000

Weaving

Acrylic 8 6400

Weaving

Acrylic 6 6000

Weaving

Polyester 6 ≥100 000

Weaving

Wool 8 2500

(2) Flexibility

The elasticity of the carpet refers to the percentage of the thickness reduction of the carpet after a certain number of collisions (dynamic load). It can be seen from Table 3-3 that the elasticity of pure wool carpets is better than that of chemical fiber carpets, while the elasticity of polypropylene carpets is not as good as that of acrylic carpets.

Carpet surface material

Percentage of thickness loss after collision (%)

500 (times) 1000 (times) 1500 (times) 2000 (times)

Acrylic carpet polypropylene carpet wool carpet 233720 254322 274324 264426

(3) Peel strength

Peel strength is a performance index to measure the composite strength of the carpet surface layer and backing, and it is also an index to measure the water resistance of the carpet after compounding. The dry peel strength of chemical fiber carpet in Shanghai area of my country is above 0.1MPa, which exceeds that of similar products in Japan.

(4) Adhesion

Adhesion is a measure of the firmness of the carpet pile on the backing.

(5) Anti-aging

The aging resistance is mainly for chemical fiber carpets. This is because chemical synthetic fibers will oxidize under the action of air, light and other factors, which will reduce their performance. It is usually evaluated by the changes in wear resistance, elasticity and color of chemical fiber carpets after being irradiated with ultraviolet rays for a certain period of time.

(6) Antistatic

Chemical fiber carpets are prone to static electricity when used, causing problems such as dust absorption and difficulty in cleaning. In severe cases, people may feel electric shock. Therefore, the production of chemical fiber carpets often incorporates an appropriate amount of antistatic agent. The antistatic property is expressed by surface resistance and static voltage.

(7) Flammability

The burning time is within 12min, the burning diameter is within 17.96cm, and the flame resistance is qualified.

Carpet types

Burning time/s Burning area and shape