Q&A
The following contain frequently-asked questions for “Katawaku-ecochan” of the plywood for concrete formwork.
If you have any further questions, feel free to ask us.
Q.：Do polypropylene sheets stretch?
A.：This is a sheet in which stretching caused by temperatures or humidity is eliminated.
Q.：Are polypropylene sheets and plywood difficult to adhere?
A.：Adherence performance of plywood for JAS concrete formwork is ensured by specially processed sheets.
Q.：Are polypropylene sheets resistant to alkalinity in concrete?
A.：The polypropylene sheet is excellent in resistance to alkalinity and form releasing capabilities.
Q.：Is a form release agent required?
A.：Make sure to use it! Less slag is adhered and scraping work is easy! The number of reuses increases!
Q.：Are the polypropylene sheets resistant to sparks?
A.：Do not bring the sheets near fire directly. Keep away from fire! The sheets will deform at about 120℃ or higher.
Q.：Are the propylene sheets slippery?
A.：They will become slippery if water or oil is deposited. In particular, watch your step.
Q.：Are nailing, saw cutting and separator hole making possible?
A.：The same as conventionally coated plywood. Smooth cutting edges are obtained by making separator holes from the sheet side.
Q.：Do polypropylene sheets release harmful gases when incinerated?
A.：Both polypropylene sheets and the adhesive do not release harmful gases.
Q.：Is the cost reduced in comparison with coated plywood?
A.：
･ The cost is reduced by increased performance of plywood with the effectiveness of polypropylene sheets.
･ The cost is reduced by the increased number of reuses.
･ The cost is reduced by decrease in waste amount.
Q.：How is plywood for concrete formwork environmentally friendly and how does it contribute to the environment?
A.：･ Increased durability contributes to reductions in CO2!
･ Waste materials of fibers are recycled for materials of the polypropylene sheet.
･ Increased durability reduces the use amount of south-sea wood, contributing to the global environment!
･ Amount of waste after use is reduced!
Q.：How are waste materials processed?
A.：Waste if recycled as materials for RPF (recycle plastic fuel) to contribute to prevention of global warming.
Q.：How does scraping work?
A.：Use of form release agent allows slag to be thoroughly removed by moistened cloth, mop or nylon brush. So, scraping work is easy!
Q.：How about scraping labor to remove slag in comparison with conventionally coated plywood?
A.： Adherence of less slag allows easy finish.
If you have any further questions, please feel free to contact us.

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