Rubber conveyor belt structure is relatively easy to be understood, which is made of rubber material for the adhesive surface coverage, wrapped in the upper and lower sides of the tape core skeleton, with the isolation layer bonding material, the covering rubber and conveyor belt; combined together percent. Rubber conveyor belt which is mainly composed of several parts.

Ordinary conveyor belt belt body has a surface smooth, flat and other fine features, our structural principle can be divided into the following sections:

(A) covered conveyor belt layer. Divided into upper and lower plastic surface layer plastic surface layer were attached to the outside with a core layer, through the customer's use of the environment to determine whether use of oil conveyor belt, cold, fire, heat and other combinations of raw material rubber band.

(2) the center of the inner core conveyor belt. This is the main part of the conveyor belt, and its high strength to bear loads, according to the transport belt force strength to match different materials such as: canvas, nylon cloth NN, polyester EP, rope material within the core, which can produce the tape core transport a monolayer or multilayer structure.

(3) isolation belt layer portion. Which is used for bonding tape core conveyor belt, rubber conveyor belt according to their different core materials are also different, its plastic cover which can be selected according to the following criteria:

(A) ordinary wear conveyor belt made from natural rubber or SBR mixed melting together.

(2) resistant to high temperatures (> 150 degrees), the choice of chlorine butyl and EPDM rubber, the highest at 200 ~ C or less.

(3) flame with the use of chlorine Diao 'diene, styrene-butadiene rubber and natural rubber mixing together, plus flame retardants.

(4) oil with the use of chlorine J · diene and styrene-butadiene rubber (NBR), if and polyethylene and used, resistant to oxidation.

In addition to covering rubber conveyor belt rubber formulations with the above, but also can be made into various forms of surface structures, such as the outer convex herringbone pattern, concave or round holes, herringbone groove belt, all of which belong to a special conveyor belt range. Determines the choice of rubber plastic cover on the nature and skeleton binding capacity, for all kinds of natural rubber and synthetic rubber special physical and chemical properties.

Second, the conveyor belt core

Of the rubber elasticity, low elastic modulus, the tape core and easy deformation under external force, mainly used for textile materials:

1. Performance comparison of various fibers

The basic properties of cotton fiber are wet strength, dry strength is low, low elongation, and rubber adhesion, heat resistance is poor, poor fatigue resistance, poor strength, coarse fibers. It is one of the lowest strength conveyor belt.

Also known as viscose rayon, and cotton fiber compared to its high strength, heat resistance and good thermal conductivity, less heat, fatigue resistance, high initial modulus, dimensional stability, but hygroscopic, therefore the moisture intensity larger decline.

Polyamide fibers, and a nylon material, the conveyor belt often used nylon 6 and nylon 66 are two, compared with cotton and synthetic fibers, 1.6-1.9 times higher strength, low moisture absorption, deformation, large shrinkage, dimensional stability, combined with the rubber is poor.

Polyester fiber, commonly known as polyester, higher strength but lower than nylon, low elongation, strong, good, good heat resistance, fatigue resistance, dimensional stability, wear resistance but inferior to nylon, and rubber combination is also poor, but it's a combination of rayon and nylon combination of features.

Polyvinyl alcohol fibers, also known as vinylon, strength and elastic modulus are not as nylon, heat resistance, wet strength and decrease rapidly.

Glass fibers, such as by specific strength calculation, the highest intensity of glass fiber, high initial modulus, low elongation, the relative density, does not absorb moisture, heat resistance, corrosion resistance, electrical insulation and heat resistance are good the disadvantage is not wearable, intolerance fatigue, poor and rubber combination.

Aromatic polyamides, commonly known as Kevlar, a synthetic wire said. It has the advantages of synthetic fibers and wires, relative density, and good chemical resistance.

Steel cord, it high strength, low elongation, generally only 0.2% to 0.3%, which are arranged evenly spaced, embedded between the covering layer.

In summary, nylon and polyester have a very good fatigue resistance, high strength and weight, especially for large scale, particularly in the transport intensity rubber band, after heat setting, and after immersion, the work load they can with Good adhesion rubber, low elongation, but the polyester is good for the design of flexible warp deep trough conveyor, polyester elongation is less than 1% and 3% -2.6% nylon. The former is suitable for long distance transportation, the latter suitable for arc operation.

2. Knitting method of the intensity

Preparation of nylon plain weave as the weft or Oxford fabric with a core, the impact resistance, tear resistance, a groove are very good, the smaller will be the relative density, manufactured with low radial crimp core structure, to improve its tensile properties, with strength up to 700kN / m. In this note is Oxford or fabric in plain weave fabric, with two radial to manufacture, such a structure as 2X1's seat weave, commonly known as the Oxford organization, of course, you can also use two weft consisting of seats 2X2 weave, or 3X 3,4 X 2, etc., can have high tear strength with the core.

In certain circumstances the length of the conveyor belt, the higher the flexibility, transition section will be longer; elastic modulus is smaller, the shorter the transition section. For a small nylon rope large modulus and modulus, the former great elongation, elongation of the latter will be reduced.