Preparation method of high-strength building plastic formwork with strong nail-holding power

Abstract

The invention discloses a preparation method of a high-strength building plastic formwork with strong nail-holding power, and belongs to the technical field of high polymer materials. The prepared formwork has strong nail-holding power, is flat and smooth, the formwork is tightly and smoothly spliced, the surface degree and the finish degree of a concrete structure after demolding exceed the technical requirements of an existing fair-faced formwork, secondary plastering is not needed, labor and materials are saved, and the formwork is light in weight and easy to install. The formwork is lightin weight and high in process adaptability, can be sawn, planed, drilled and nailed, can be randomly formed into any geometrical shape, meets the requirements of building formworks in various shapes,and is simple and convenient to demould. Concrete does not stick to the plate surface, a release agent is not needed, demolding and ash removal are easy, and the stability and weather resistance are achieved. The formwork is high in mechanical strength, under the temperature condition of 20-60 DEG C, low in shrinkage, free of wet expansion, cracking and deformation, stable in size, resistant to alkali, corrosion, flame, water and mice, resistant to insects, beneficial to maintenance, free of water absorption, high in turnover frequency, not less than 100 times of repeated use of nails and lowin use cost.

Description

technical field [0001] The invention belongs to the technical field of polymer materials, and in particular relates to a preparation method of a high-strength building plastic template with strong nail-holding force. Background technique [0002] Construction is one of the pillar industries of the national economy. Concrete forming of beams, slabs, and columns in today's construction projects; concrete forming of bridges, tunnels, and expressway hubs in the transportation sector; dams, water towers, and tanks in the water conservancy and electric power sectors Concrete molding; and the concrete molding of launch pads, launching racks and underground works in the military industry are inseparable from building templates. The American Concrete Institute makes the point that the cost of concrete forming formwork is close to half the cost of concrete. Most of the formwork materials in our country are wood formwork and steel formwork. Wood formwork has limitations such as less ...

AI Technical Summary

Problems solved by technology

In the past, wooden formwork relied on natural thick fibers inside, which produced greater friction with the nails, which greatly increased the nail-holding force, but adding a large amount of reinforcing fillers to the plastic did not actually improve the nail-holding force, but would cause The stress concentration of the formwork is extremely easy to crack. For example, the glass fiber formwork cannot even be nailed. Even ordinary polypropylene and polycarbonate plates without reinforcing fillers require highly skilled nailing skills or drilling and drilling. The reserved method is extremely wasteful of man-hours and virtually increases the cost, and the strength of the nail-holding force is directly related to the repeated use of the plastic formwork. Most of the plastic formwork is scrapped during the joining process. Those skilled in the art urgently need to develop a method for preparing high-strength architectural plastic formwork with strong nail-holding force

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