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PVG conveyor belt
PVG fire-retardant conveyor belt, the belt body not to take off layer, shock resistance, low elongation, tear. (plastic surface) PVG type (flame retardant conveyor belt, coal mine conveyor belt) whole core flame retardant belt, perform MT / 914-2008 standard.

Safety performance:

Flame retardant conveyor belt has passed the test of the flame retardant test and static test, and obtained the certificate of approval of coal logo and customer recognition.

Mechanical properties:

Flame retardant conveyor belt mechanical performance, can provide users with the longest service life and economic installation.

The longest service life, the service life of the belt body is determined by the following factors, from the warp and weft to filament and cotton woven cover tightly with core; Immersed in PVC material made with special formula as high bonding strength between the core and cover; Special formula cover; To make the belt body impact resistance, tear resistance, abrasion resistance.

Flame retardant conveyor belt with whole core belt abrasion resistant, antistatic, waterproof, flame retardant, high strength, safety performance and lower cost compared with other flame retardant conveyor belt, as well as the lower price, is more common at home and abroad, one of the popular varieties of flame retardant conveyor belt, particularly suitable for coal mine underground, such as low gradient of conveyor.

Product structure: flame retardant conveyor belt adopts integral as bone frame material, belt core by dipping, coating has excellent antistatic, flame retardant properties of the PVC material such as plasticizing and.

Joint performance:

With flame retardant conveyor belt according to body strength and core structure, using the mechanical connection, can achieve the strength of the knot with nominal tensile strength of 50% to 90%. Using the sulfide, can achieve the strength of the knot with nominal tensile strength of 60% 90%. Various forms of joint mode can meet the different needs of customers, to ensure safe and efficient operation of the system.

Flame retardant performance:

Friction roller: roller surface temperature is not more than 325 ℃.

Torch burning, full of thick specimen burner flame time average no greater than 3.0 S, to cover the average no greater than 5.0 S.

Propane gas combustion: nondestructive length is greater than 250 mm.

On the surface resistance value:, below average no greater than 3.0 x 10.

Flame retardant principle

Natural rubber and styrene-butadiene rubber flammable, must add fire retardant to achieve. Stratified flame retardant PVG belt stick rubber flame retardant system using antimony trioxide, chlorinated paraffin, a mixture of aluminum hydroxide and zinc borate system. Role is as follows: antimony trioxide, flame retardants, used alone without flame retardant effect, but with a chlorine compounds and shows strong flame retardant effect. When burning, antimony trioxide and chlorine compounds in fuel surface reaction generated volatile chlorinated antimony and antimony oxychloride. The volatile can absorb heat, they produce the gas separates oxygen and dilute combustible. Chlorinated paraffin: flame retardant, high temperature decomposition of chlorinated paraffin produce chlorine atom, chlorine atom reaction with polymer (rubber, nylon, canvas, etc.) to generate hydrogen chloride and hydrochloric acid with highly active hydroxyl free radicals or hydrogen reaction generated hydrogen gas or water, to interrupt the chain oxidation process, and make slow combustion, and stop, by adding flame retardants and carbon black as to meet the requirement of flame retardant.

PVG belt types and technical parameters of folding edit this paragraph

Product executive standard MT914-2002 BS3289 HG2805

Selection of safety factor 10 * 1/10 (tensile strength)

Transportation Angle < 20 ℃

The standard model

Corresponding level

Tensile strength p, N/mm

Tensile elongation or greater, %

Recommended minimum transmission roller diameter

The longitudinal

The transverse

The longitudinal

The transverse

680 s

Level 4

680

265

15

18

400

800 s

five

800

280

500

1000 s

Level 6

1000

300

630

1250 s

seven

1250

350

750

1400 s

8

1400

350

750

Safety performance:

Name of the performance

Alcohol burning

Propane gas combustion

Electrical conductivity

Roller friction

Standard values

The average 3 s or less, single value 10 or less s (cover)

250 mm or higher

3 x10 or less Ω

325 ℃ or less

Average 5 s or less, single value 15 or less s (no cover)

No Mars

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