How to avoid UHMWPE sheet off the warehouse?
How to avoid UHMWPE sheet off the warehouse?
Some of the installed UHMWPE liners will be prematurely dislodged and damaged in real life situations. So how to avoid the phenomenon of shedding? Today to do a comprehensive explanation:
1、accurate UHMWPE sheet liner size selection
Due to the different expansion coefficients of different substrate materials, the linear expansion coefficient of UHMWPE sheet is about 150T/°C, which is more than ten times that of steel plate and concrete. Due to the large temperature difference between day and night, UHMWPE board will produce normal expansion and contraction. This will make the liner and fixed bolts between the tearing stress, accelerate the bolt to fall off, resulting in the phenomenon of stripped plate. In order to improve the service life, it is recommended to use the board with the size of 1 metre by 1 metre or less for design and installation.
2、reasonable form of masonry joints
Between the plate and the plate, the form of masonry joints in accordance with the direction of material flow, there are two kinds of transverse and longitudinal. Horizontal connection take vertical joints do not hit the bevel, using the plane right angle connection, the gap at the joints is not more than 3mm. sloping and vertical corners, generally there should be no joints, the use of bending method will be folded into the corresponding angle of the liner.
3、 good raw materials and excellent production process
Molecular weight between 4-6 million polyethylene resilience in the best state, both the highest wear resistance, but also the best impact resistance, the best cost performance. Forming because UHMWPE molecular structure viscous, poor fluidity, so need to use moulding process, high temperature and high pressure cold extension shaping.
4、The installation requirements of UHMWPE board base material
If the substrate is made of concrete, the gap must not be too big. Therefore, it is necessary to treat the concrete surface and level it with cement before installation. Expansion solenoids must be firmly installed in the installation area to avoid falling off due to long time material scouring and vibration.
