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Plastic-covered plywood building formwork and preparation method thereof

A technology for building formwork and plywood, used in chemical instruments and methods, adhesives, adhesive types, etc., can solve problems such as difficulty in adapting to high standard requirements, less turnover, and inability to use, to avoid water and moisture deformation, Small thermal conductivity, the effect of ensuring the quality of the project

Inactive Publication Date: 2017-01-11
CHINA SHANXI SIJIAN GRP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Its disadvantages are low strength, easy deformation, intolerance to use, less turnover times, and difficulty in adapting to high standard requirements

Method used

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  • Plastic-covered plywood building formwork and preparation method thereof
  • Plastic-covered plywood building formwork and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] This embodiment provides a kind of plastic cladding plywood building template, such as figure 1 As shown, from top to bottom are the upper polymer coating layer 31, the upper wood skin layer 21, the plywood core layer 1, the lower wood skin layer 22 and the lower polymer coating layer 32; wherein, the upper polymer coating layer 31 The thickness is 0.2mm, and the upper veneer layer 21 is a poplar board (moisture content 11wt%) with a thickness of 2.2mm; the plywood core layer 1 is a vertical structure formed by bonding several vertically arranged wooden strips 11, The thickness of 9.2mm, the lower veneer layer 22 is the poplar board (moisture content 11wt%) of thickness 2.2mm, and the thickness of lower macromolecule coating layer 32 is 0.2mm.

[0034] Wherein, the material of the upper polymer coating layer 31 and the lower polymer coating layer 32 is the same, and both are prepared by the following method:

[0035] (S1) Weigh 120 parts by weight of polyethylene, 130 ...

Embodiment 2

[0043] This embodiment provides a plastic-clad plywood building formwork, which includes an upper polymer coating layer 31, an upper veneer layer 21, a plywood core layer 1, a lower veneer layer 22, and a lower polymer coating layer 32 from top to bottom; , the thickness of the upper polymer coating layer 31 is 0.6mm, and the upper veneer layer 21 is a eucalyptus board (moisture content 10wt%) with a thickness of 1.8mm; The vertical structure of the plywood core layer 1 is 10.8mm in thickness; the lower veneer layer 22 is a eucalyptus board (moisture content 10wt%) with a thickness of 1.8mm, and the thickness of the lower polymer coating layer 32 is 0.6mm.

[0044] Wherein, the material of the upper polymer coating layer 31 and the lower polymer coating layer 32 is the same, and both are prepared by the following method:

[0045] (S1) Weigh 150 parts by weight of polypropylene, 110 parts by weight of talcum powder, 15 parts by weight of titanate, 5 parts by weight of sodium st...

Embodiment 3

[0053] This embodiment provides a plastic-clad plywood building formwork, which includes an upper polymer film layer 31, an upper veneer layer 21, an upper non-woven fabric layer, a plywood core layer 1, a lower veneer layer 22, and a lower non-woven fabric layer from top to bottom. Cloth layer and lower polymer coating layer 32; Wherein, the thickness of upper polymer coating layer 31 is 0.4mm, and upper veneer layer 21 is the poplar board (moisture content 9wt%) of thickness 2.0mm, the upper non-woven fabric layer The specification is 60g / m 2 , thickness is 0.4mm; The plywood core layer 1 is the vertical structure that adopts some vertically arranged wooden strips 11 to bond together, the thickness of the plywood core layer 1 is 10mm, and the lower veneer layer 22 is a poplar board ( Moisture content 9wt%), the specification of the lower non-woven fabric layer is 60g / m 2 , the thickness is 0.4 mm, and the thickness of the lower polymer coating layer 32 is 0.4 mm.

[0054] ...

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Abstract

The invention relates to a plastic-covered plywood building formwork. The building formwork comprises an upper high-polymer laminating layer, an upper veneer layer, a plywood core layer, a lower veneer layer and a lower high-polymer laminating layer sequentially from top to bottom, and the thickness ratio of the upper high-polymer laminating layer, the upper veneer layer, the plywood core layer, the lower veneer layer and the lower high-polymer laminating layer is (0.2-0.6):(1.8-2.2):(9.2-10.8):(1.8-2.2):(0.2-0.6). The plywood core layer in the plywood building formwork adopts a vertical structure and is high in strength and good in toughness, and use number of building formwork supports can be reduced; the building formwork is easy to demold, not stick to concrete and is weather-resistant, anti-corrosion and high in durability, so that construction is convenient, and the project quality is guaranteed; the turnover time is 3-5 times that of traditional building formworks; the thermal expansion and cold contraction ratio is close to that of wood, the thermal conductivity coefficient is small, winter construction insulation is facilitated; the building formwork is good in water resistance and water-impermeable, and the condition that the building formwork is affected with damp and deforms with water in the concrete curing process is avoided.

Description

technical field [0001] The invention belongs to the technical field of building formwork, and in particular relates to a plastic-covered plywood building formwork and a preparation method thereof. Background technique [0002] Building formwork is an indispensable tool in concrete pouring projects. In current concrete pouring projects, formwork engineering generally accounts for 20-30% of the cost of concrete structure projects, 30-40% of engineering labor, and about 50% of the construction period. , Formwork technology directly affects the quality, cost and benefit of the project. It is an important aspect to promote the progress of construction technology in our country. [0003] At present, there are two main types of concrete formwork in the domestic market, steel formwork and plywood formwork. The steel formwork is heavy in quality, high in cost, inconvenient to use, easy to rust, easy to bond concrete, and brings inconvenience to construction. Engineering Quality. T...

Claims

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Application Information

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IPC IPC(8): E04G9/05C08L23/06C08L27/06C08L25/06C08L77/00C08L51/06C08L91/06C08L23/12C08K13/02C08K3/34C08K3/26C08K3/30C09J161/28C09J161/06C09J103/02B32B27/06B32B21/08B32B27/18B32B27/12B32B21/10B32B5/02B32B27/32B32B27/30
CPCE04G9/05B32B5/02B32B21/08B32B21/10B32B27/06B32B27/12B32B27/18B32B27/304B32B27/32B32B2307/712B32B2307/714C08K3/34C08K13/02C08L23/06C08L25/06C08L27/06C08L77/00C09J161/06C09J161/28C08L51/06C08K2003/265C08L3/02C08L23/12C08L91/06C08K3/346C08K2003/3045
Inventor 贺伟牛胜利吴超马宁
Owner CHINA SHANXI SIJIAN GRP
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