Construction points for attention when laying plas

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Key points for construction when laying plastic floor surface

plastic floors can be divided into polyvinyl chloride (PVC) plastic, polyethylene (PE) plastic and polypropylene (PP) plastic according to their basic raw materials. Because PVC has good fire resistance and self extinguishing property, and its performance can be changed by changing the amount of plasticizer and filler, at present, PVC plastic flooring is the most widely used

then, what construction points should we pay attention to when laying the plastic floor surface

1. Machines and tools required for welding should be prepared

2. During the construction of plastic floor surface, the indoor relative humidity shall not be greater than 80%

3. The weld joints shall be connected by rubbing with the arc height under oblique loading and unloading to 0.7 times, 1.0 times and 1.3 times the rated load. The desoldered part shall be repaired and the convex part of the weld joint shall be flattened

4. When paving the external corner skirting board, it is necessary to repair weld a piece of soft board at the horizontal corner cutting to make the external corner parts, and then weld or bond

5. When paving the plastic skirting line, nail the plastic strip on the reserved wooden bricks in the wall with a distance of about 40 ~ 50cm, then spray and bake the plastic strip with a welding gun, and then bond the skirting line with the plastic strip

6. After the soft plastic plate is pasted on the base course, if the gap needs to be welded, it can be welded after 48 hours, and hot air welding is used. The air pressure should be controlled at 0.08 ~ 0.1MPa, and the temperature should be controlled at 180 ~ 250 ℃

7. After the treatment of the base course, apply a thin and uniform primer to improve the bonding strength between the base course and the surface course. At the same time, it can also make up for the quality defects such as bulging and edge warping that may occur in the plastic plate due to the uneven amount of glue, which will cause the impact force (especially displacement) to change

8. When preparing plastic plate materials, the room squareness deviation should be considered, and the method of combining prefabrication and on-site production should be adopted. Each prepared plate should be numbered in place to avoid wrong use during pasting, and trial paving should be carried out before paving

9. After the primer is dry, snap the line, divide the grid, place the center line, positioning line and sideline on the base surface according to the design requirements, and leave 200 ~ 300mm away from the wall as the edge to ensure that the plate is uniform and the horizontal and vertical joints are straight

10. When paving the plastic skirting board at the inner corner, first press the plastic board on the inner corner with two symmetrical wooden molds, then remove a wooden mold, draw the cutting line at the turning and overlap of the plastic board, and then weld the cutting at the intersection of 45 ° of the horizontal plane to make the inner corner parts, and then weld or bond them

11. Groove treatment shall be carried out at the joints of plastic plates. During bonding, the groove shall be made into a slope in the same direction, and the overlapping width shall not be less than 30mm; V-shaped groove and slope angle shall be made during welding β: When the plate thickness is 10 ~ 20mm, β= 65°~75°; When the plate thickness is 2 ~ 8mm, the pressure testing machine is equipped with safety protection devices during design and manufacture β= 75°~85°。 The thicker the plate is, the smaller the slope angle is. The thinner the plate is, the larger the slope angle is

12. When paving the plastic board, it should be carried out from the center to the surrounding along the axis according to the snap line position. The applied adhesive must be uniform and about 10mm beyond the dividing line, and the coating thickness should be controlled within 1mm. The back of the plastic plate should also be evenly coated with scratch adhesive. After the adhesive layer is dry to non stick (about 10 ~ 20min), it can be paved. It should be in place at one time. The flat push jaw electronic universal testing machine is generally used for single space electronic universal testing machine, which is accurate and dense

13. The plastic plate should be preheated and dewaxed before paving, otherwise the pasting effect will be affected and the surface layer will bulge in the future. The preheating treatment of soft PVC board should generally be put into hot water with a temperature of about 75 ℃ and soaked for 10 ~ 20min, so that the board surface is soft and flattened, and then taken out to dry for use, but it is not allowed to preheat by fire or electric furnace; Semi rigid PVC board is usually degreased and dewaxed with cotton wool dipped in acetone: gasoline (1:8) mixed solution. The plastic plates after preheating and wax removal should be placed flat in the room to be paved for at least 24h to adapt to the paving environment

14. The plastic floor surface course shall be paved on the cement base course. The base course surface shall be flat, hard, dry, smooth, clean, free of grease and other impurities (including sand particles), and the surface moisture content shall not be greater than 9% In case of pitting, sanding, cracks or large dents on the surface, lotion putty should be used to repair, and the thickness of each painting should not be greater than 0.8mm. After dry operation, use No. 0 iron abrasive cloth to polish, and then paint the putty for the second time. Until the surface is flat, use diluted lotion to paint again, so as to increase the integrity and bonding force of the base course. When the base surface is checked with a 2m ruler, the allowable gap shall not be greater than 2mm

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