Conveyor belt core research and development and use of
First, China's coal mine conveyor belt core of the overall status of our country is the largest producer of coal in 2005, coal production 2.11 billion tons, of which 80% or more
modes of transport by belt. More than 2,000 the number of medium-sized mine conveyor belt at 25,000 units, a total of about 28 million m belt, mainly PVC, PVG whole flame
retardant fabric conveyor belt, in 2005 amounts to around 7.5 million meters, is expected to to the 2010 annual demand of about 10 million meters or so. With the rapid
development of industry, conveyor belt, coal conveyor belt core overall demand also increases. Current production of coal mine whole with a core of about more than 100
manufacturers, the annual output of about 10 million meters long.
Most companies can only produce small size and low wide-band core (M1400, width 1. 4m and below), excess capacity, the market is extremely competitive, and capable of producing
M 1800, width 1. 4m above only a few manufacturers, manufacturers of these products in short supply situation.
Second, China's coal mine whole with a core gap with foreign countries although China PVC, PVG whole flame retardant fabric conveyor belt production scale and product yields are
highest in the world, the technical level and product quality status has also been greatly improved, but its skeleton material production, compared with the industrialized Telescopic belt conveyor
countries, there are still significant deficiencies. First, China's production of the whole flame retardant with a late start, and now the product specifications and varieties
can not meet the actual needs of the market.
At present, most companies can only produce 0. 65 - 1. 2mm wide, M 680 - M1400 with a core strength class as a whole, only the individual businesses can produce width 1. 4 - 1.
6mm wide, M2000-M 2800 intensity level the whole with a core.
PVC, PVG whole core fire-retardant conveyor belt depends on the overall strength of the material with a core, with the core of the overall domestic latitude and longitude are
based on polyester / cotton or nylon / cotton-based, and thus with the body thickness, weight, strength low, low carrying capacity. Foreign production as a whole with a core
general use as polyester or aramid warp, weft of nylon and cotton, and thus with the core thin, light weight, high strength, high carrying capacity. The difference with the core
directly affect the mechanical properties and service life of the belt. Second, the manufacturer can not be formed with the production of chemical fiber manufacturers supporting Metal detector for food
industries. Current domestic production as a whole is difficult to achieve with the core of the manufacturers of raw materials production integration, the raw material can not
keep up, and the supporting facilities are lacking, resulting in less on the scale of production enterprises, the product's overall production technology with foreign countries
there is still a large gap.
Third, China's coal mine conveyor belt core overall trends in order to adapt the development of national economy, especially the needs of the coal industry, China's total coal
mine conveyor belt core and fabric will be the same as the whole flame retardant conveyor belt toward more variety, more functionality, high performance, lightweight, energy-
saving, environmental protection and long life trend.
1, large size, high strength, light weight with the development of the coal industry, a large number of 5 million tons or even more than ten million tons of large-scale mine
coming on stream, large size, high intensity whole flame retardant fabric conveyor demand more to the greater width than large mines require the use of even up to 1600mm 3000mm,
strength of more than 2500N / mm even reached 4000N / mm whole flame retardant fabric conveyor belt, this belt carrying a large amount of long distance transport, thus requiring
strength high, long life, must be vulcanized joints; also requires the body with thin, light weight, in order to facilitate investment and energy savings, you must use the new
materials to meet the requirements of the skeleton. With the core material will be from the present to polyester / cotton yarn gradually to nylon / cotton, aramid / nylon
direction. With a core specification, the intensity will be from the current low, medium level gradually to the main high-grade direction.
2, multi-species, multi-functional, high-performance current overall braid core is mainly used for flame-retardant conveyor belt, while the whole with a core of all the
materials are flammable. To solve this problem, the tape core dip paste formulated with a large amount of flame retardant, flame retardant tape so that the physical and
mechanical properties were seriously damaged, thereby improving the flame retardancy of reinforcing material should be the direction of future efforts a. Reinforcing material
adhesion strength of the colloidal material affecting the life of the whole flame retardant with an important factor, thus increasing the chemical fiber and rubber, plastic
materials, the adhesive performance is an important issue. Due to resource and price factors, polyester filament yarn in the present and future for quite a long period of time
is still whole with a core of key raw materials. However, the current domestic polyester industrial filament breaking strength and elongation at break was still unable to meet
the whole flame retardant with high-intensity development needs, thus increasing tensile strength and elongation at break is the whole with a core of polyester industrial
filament future development direction. As the conveyor belt fabrics conform to many varieties direction of the trend, the fabric as a whole with a core in the material,
structure, performance and other aspects should also be multi-species direction.
3, the formation of industry groups, improve the technical level, the formation of scale coal industry, the rapid development of related industries will bring many
Mine Conveyor belt core larger overall growth has attracted many companies to join and attention to this area. However, with the core of China's overall growth in a gradual
process, its growth rate is not only related with the degree of development of the national economy, but also with the overall domestic producers to meet with a core mine the
actual needs of technical and managerial capacity. Over-development capacity and overcapacity will cause damage to the industry as a whole with a core. In order to better meet
the needs of the domestic coal industry, our domestic manufacturing enterprises must set up industry groups, the formation of raw materials, production integration, and secondly
to the digestion and absorption of advanced technologies, focusing on the formation of independent intellectual property rights, improve the existing level of technology. In
order to ensure that products have a cost advantage, the formation of scale.