PP plastic film faced plywood

PP plastic film faced plywood, also known as polypropylene building template, is a new environmentally friendly building template material made of polypropylene (PP) as the core substrate, modified and processed through special processes. Compared with traditional wooden formwork, steel formwork, bamboo plywood, etc., it is widely used in cast-in-place concrete structure construction scenarios such as building construction, bridge engineering, municipal

construction, etc. due to its advantages of lightweight, durability, environmental protection, and economy. It can adapt to the pouring and forming of various components such as beams, slabs, columns, walls, stairs, etc., and is one of the important directions for upgrading the formwork system in the development of building industrialization.

Material composition

The core material system of PP film building plywood is the synergistic combination of "solid wood plywood substrate+PP film layer", which ensures the load-bearing performance through high-quality substrate, optimizes the user experience with the help of special film layer, and enhances the comprehensive quality with modified additives and composite process materials. The specific composition is as follows:

Base material (core material)：Birch, poplar, pine and other solid wood veneers (cross laminated)+phenolic adhesive/weather resistant adhesive

Modified/auxiliary additives：Waterproof agent, anti-aging agent, flame retardant (optional)

Core membrane layer：Pure PP film (thickness 0.03~0.05mm), PP composite film (PP mixture thin film layer+non-woven fabric layer+pure PP film layer)

Composite process materials：Hot composite special additives (such as maleic anhydride grafted polypropylene MAPP)

Technical Specifications:

Static flexural strength: ≥ 35MPa (longitudinal), ≥ 25MPa (transverse)

Static modulus of elasticity: ≥ 4000MPa

Internal bonding strength: ≥ 0.7MPa

Film adhesion: ≥ 1.5N/mm

Water resistance: After boiling in boiling water for 48 hours, the strength retention rate is ≥ 85%, without layering or foaming

Formaldehyde emission: ≤ 0.124mg/m ³ (E0 level)

Product Features

Combining rigidity and flexibility: Combining the high rigidity of solid wood plywood with the toughness advantages of PP film, it has excellent static bending strength and elastic modulus, which can withstand the load and pressure of cast-in-place concrete and has certain impact resistance. It is not easily damaged during handling and construction, and is suitable for complex construction conditions.

Waterproof and wear-resistant: The surface PP film layer has excellent hydrophobicity, which can prevent moisture from penetrating into the substrate and avoid traditional plywood from being affected by moisture, deformation, and mold; The film layer has high hardness and wear resistance, which can resist bumps and scratches during construction. At the same time, PP film is resistant to acid and alkali corrosion, suitable for humid and harsh environments such as coastal areas and basements.

Convenient demolding: PP film has a smooth surface and extremely low adhesion to concrete, making it easy to demold without the need for a large amount of release agent. After demolding, the concrete surface is flat and smooth, without honeycomb or rough surface, and can directly enter the next process, reducing plastering and repair workload and improving project quality and construction efficiency.

Environmentally friendly and low emission: using E0 grade environmentally friendly plywood substrate and formaldehyde free composite process, there is no release of harmful gases such as formaldehyde during production and use; After scrapping, the substrate can be recycled and reused, and the PP film can be separated and recycled, reducing construction waste pollution and meeting the requirements of green building development.

Flexible construction: retaining the characteristics of traditional plywood that can be sawed, planed, and nailed, making it easy to cut and process according to the size of the components on site, and suitable for the construction of irregular components; High standardization of specifications, simple splicing, and can be quickly assembled with specialized buckles and keels, greatly improving construction efficiency.

Product advantages

Significant economic advantages: the turnover times can reach more than 30 times, far exceeding traditional plywood (5-8 times), and the single use amortization cost is low; Convenient demolding reduces the cost of subsequent repair processes, lightweight characteristics reduce the investment in manual handling and lifting equipment, and the overall cost can be reduced by 15% -25% compared to traditional templates; After scrapping, the substrate and film layer can be separately recycled and monetized, further reducing cost losses.

Widely applicable scenarios: It can be adapted to various cast-in-place concrete structures such as housing construction (residential, office buildings, shopping malls), bridge engineering (box beams, cover beams), municipal engineering (tunnels, pipe galleries, platforms), etc. It can meet the formwork requirements of different parts such as beams, slabs, columns, walls, stairs, and irregular components, especially suitable for complex construction environments such as humid, outdoor, and coastal areas.

Low maintenance cost: It has strong water resistance and corrosion resistance, and does not require air drying or anti-corrosion treatment like traditional plywood after use. It also does not require regular rust removal and painting like steel formwork. Only simple cleaning of surface concrete residue is needed for reuse, with minimal maintenance workload, further reducing maintenance costs in the later stage.

Excellent safety performance: The material is non-toxic and odorless, with a formaldehyde emission level of E0, ensuring the health of construction personnel; The characteristics of high rigidity and strong impact resistance can reduce the risk of damage and fracture during handling and use; Optional flame-retardant film layer meets the A2 level flame-retardant standard, which does not produce toxic gases during a fire and reduces safety hazards.