PTFE, PFA, FEP, PVDF Fluoroplastic products industry experts
Teflon board manufacturers share the use of stair panels
Classification:
Industry dynamics
Author:
PFA tube little sister
Source:
Dankai
Release time:
2022-12-21
Visits:
PTFE board manufacturers staircase PTFE board is mainly used in engineering stairs is a hard PTFE stair support, in the current use of stairs is quite extensive. Because the stairs
It is not involved in the overall seismic calculation of the structure, and sliding bearings need to be designed according to the traffic restrictions. The specifications of the PTFE plate used in the stairs must meet the design requirements and construction specifications.
set. It is required that the surface of the PTFE plate is smooth and clean, and the surface is free of damage.
Usage: The general thickness of the special PTFE board for stairs is 5mm; Its length is the length of the stair board; The width is the step width. Cutting of the staircase Teflon requires the use of profile cutting.
machine for shearing. After the installation of the staircase PTFE board is completed, use a gummed paper iron cover or use a plastic film to cover and protect the easily contaminated parts. The parts that are easily scratched shall be installed.
Full guardrail protection.
Figure 1: PTFE sheet Source: Dankai
The relative molecular mass of polytetrafluoroethylene is relatively large, with a low of hundreds of thousands and a high of more than 10 million, generally in millions (the degree of polymerization is in the order of 10 4, while polyethylene is only in
10 ^ 3). Generally, the crystallinity is 90-95% and the melting temperature is 327-342. The CF2 units in the polytetrafluoroethylene molecule are arranged in a sawtooth shape, because the radius of fluorine atoms is slightly higher than that of hydrogen.
Therefore, the adjacent CF2 units cannot be completely cross-oriented in reverse, but form a helical twisted chain, and the fluorine atoms almost cover the surface of the entire polymer chain. This
The molecular structure explains the various properties of PTFE. When the temperature is lower than 19, a 13/6 helix is formed; a phase transition occurs at 19, and the molecules are slightly unwound to form a 15/7 helix.
PTFE plate manufacturers in the traditional frame structure staircase design, PTFE plate staircase sliding support, plate staircase ladder generally only according to one-way bending members set
However, in the earthquake action, the plate as an oblique support member bears axial force and shear force, so the stress at the connection between the ladder plate and the ladder beam is large. while stairs with sliding supports will shear and bend
The moment release greatly reduces the force on the ladder.
This article is originally created by Teflon's little sister. Welcome to pay attention and take you to grow knowledge together!
Key words:
Method of use, staircase, teflon, general, use, molecule, support, design, forming, sliding
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