サンワイズ株式会社 manufactures ケムシャット, a fixed sheet-type 防煙垂れ壁 built from non-combustible membrane certified by 国土交通大臣認定 — U-CLEAR SHEET K3 under NM-5635 and the CG-55 semi-transparent grade under NM-4049-2. The sheet replaces wired glass in retail and office smoke compartmentation with a lightweight, shatter-free assembly at 92% light transmittance. The company has built cleanroom and industrial joinery for over 40 years from its Shizuoka base.