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1 electrostatic polyvinyl chloride (PVC) floor
1.1.1 The construction content of anti-static polyvinyl chloride (PVC) ground includes basic treatment, grounding system installation, glue preparation, anti-static polyvinyl chloride (PVC) veneer (hereinafter referred to as) paving and cleaning construction, testing and Quality inspection.
1.1.2 The construction site temperature should be between 10-35 ℃; the relative temperature should not be greater than 80%; the ventilation should be good. The construction of other indoor projects should be basically completed.
1.2 Materials, equipment and tools
1.2.1 Construction materials should meet the following requirements:
1 veneer: physical properties and appearance dimensions should meet the requirements of SJ / T11236 of the General Specification for Anti-static Plywood, and have permanent anti-static properties. Its volume and surface resistance: The resistance value of the static conductive panel should be lower than 1.0 × 106Ω, and the resistance value of the static dissipative panel should be 1.0 × 106-1.0 × 109Ω.
2 conductive adhesive: should be water-soluble adhesive, the resistance value should be less than the resistance value of the veneer, and the bonding strength should be greater than 3 × 106N / M2
3 plastic welding rod: should use uniform color, consistent outer diameter, good flexibility.
4 Copper foil for conductive ground mesh: the thickness should not be less than 0.025mm, and the width should be 15mm.
1.2.2 The veneer should be stored in a ventilated and dry warehouse, away from acids, alkalis and other corrosive substances. It should be loaded and unloaded lightly during transportation. Strong impact is strictly prohibited. Do not put it in the sun or rain.
1.2.3 Commonly used construction equipment (including tools) should include slotting machines, plastic welding torches, rubber hammers, cutters, rulers, brushes, waxing machines, etc. The specifications, performance and technical indicators should meet the requirements of the construction process.
1.3 Construction preparation
1.3.1 Familiar with the design and construction drawings and survey the construction site.
1.3.2 Develop a construction plan, draw an antistatic ground grounding system diagram, ground terminal diagram, and ground network layout diagram.
1.3.3 Prepare various construction materials, equipment and tools according to the requirements of the construction process and arrange them neatly.
1.3.4 When the ground area is larger than 140m2, it should be laid for demonstration before formal construction.
1.3.5 The construction site shall meet the following requirements:
1 When the ground floor is cement floor or terrazzo floor:
1) The ground should be clean, and the paint, adhesive and other residues on the ground should be cleaned up.
2) The ground should be level and checked with a 2m ruler, and the gap should be less than 2mm. If there is unevenness or cracks, it must be repaired.
3) The ground should be dry. If it is a ground floor, it should be waterproofed first.
4) The surface layer should be hard and not sandy, and the strength of the mortar should not be lower than 75.
2 When the base floor is the floor (wooden floor, tile, plastic, etc.), the original floor should be removed and the residual adhesive on the floor should be completely removed.
3 The construction site should be equipped with artificial lighting devices.
1.3.6 Determine the location of the ground terminal: the area is less than 100m2, and the ground terminal should be no less than one; for every 100m2 of area increase, one or two ground terminals should be added.
1.3.7 The ground floor should be thoroughly cleaned before construction, and the ground must be free from dirt such as scum and dust.
4.1 1.4.1 Demarcation of the reference line should be reasonably determined according to the geometry of the room.
1.4.2 The conductive copper foil grid should be laid according to the ground network layout plan. The vertical and horizontal intersections of the copper foil should be at the center of the veneer. The copper foil should be laid straight, without curling or interruption. The copper foil strip connected to the ground terminal should have sufficient length.
1.4.3 Configuring conductive adhesive: Carbon black and glue should be configured in a weight ratio of 1: 100, and stir well.
4.4 1.4.4 Brushing: It should be on the ground and the conductive copper foil that has been pasted. The coating should be uniform and comprehensive, and it should be dried naturally after coating.
1.4.5 Paving and pasting panels: When the dewatered floor is dried to the point where it is not sticky, it should be laid immediately after production. When laying, the two right-angled edges of the board should be aligned with the reference line. There should be a 1-2mm gap between the board and the gap width should be kept basically the same. Use a rubber hammer to evenly beat the board surface, and check it to ensure that it is firmly adhered. Use non-standard overlay boards at the edge of the floor. Qi, the non-standard veneer is cut from the standard veneer with a cutter.
1.4.6 When laying on the ground terminal, first pull out the copper wall iron wall foil strip connected to the ground terminal, and connect it firmly with the ground terminal by soldering or crimping. Continue to paste the panel.
1.4.7 After paving the entire room, a slotting machine should be used to weld the groove along the seam of the veneer panel. The slot line should be straight and even, and the slot width is 3 ± 0.2mm.
4.8 1.4.8 Apply a plastic welding gun to perform thermoplastic welding at the welding slot to connect the board and the board into one. Welding excess should be leveled with a sharp knife, but the surface of the panel should not be scratched.
4.9 1.4.9 The construction of the grounding system should include the application of conductive adhesive layer, conductive copper foil ground network, grounding copper foil, grounding terminal, grounding down conductor, grounding body, etc. Except for the provisions of this chapter, the rest shall comply with the provisions of this code.
1.4.10 After finishing the patching operation, clean the floor and apply anti-static wax to protect it.
1.5 Testing and Quality Inspection
1.5.1 The anti-static polyvinyl chloride (PVC) ground testing equipment shall meet the requirements of the "common testing equipment" in this code.
1.5.2 Test environment: The temperature should be between 15-30 ° C, and the relative humidity should be less than 70%.
1.5.3 The surface resistance value and system resistance value of anti-static polyvinyl chloride (PVC) floor shall be measured by the following:
1 Surface resistance measurement: the entire antistatic floor should be divided into 2-4m2, the measurement area should be randomly selected from 30% -50% of the measurement area, and the two electrodes should be placed on the surface of the veneer, with a pole spacing of 900mm. The contact should be good. In the same area of 2-4m2, 4-8 values should be measured and recorded.
2 System resistance measurement: Several points should be randomly selected in the area closest to each ground terminal. One electrode should be in good contact with the surface of the veneer, and the other electrode should be connected to the ground terminal. The system resistance value should be measured and recorded.
3 The quality assessment method shall be implemented in accordance with the "Sampling Procedures and Sampling Tables for Inspection and Counting of Batches" GB2828.
1.5.4 Electrical performance indicators should meet the following requirements:
1 Requires a conductive type, whose surface resistance and system resistance are less than 1.0 × 106Ω.
2 Requires static dissipative type, whose surface resistance and system resistance are between 1.0 × 106-1.0 × 109Ω.
3 The system ground resistance value should meet the design requirements.
1.5.5 Appearance should meet the following requirements:
1 No drumming, delamination or cracking;
2 No obvious unevenness;
3 no obvious scratches;
4 No obvious color difference.