Bigat ng isang plywood sheet
Ang plywood ay layered wood panel na gawa sa tatlo o higit pang glued at processed veneer layer, karaniwang odd number.
Manipis ang veneer at inilalatag na perpendicular ang grain ng magkatabing layer. Nagbibigay ito ng mataas na strength.
Mga uri, katangian at bigat ng birch plywood
Malawak ang gamit dahil sa modernong gluing technology, strength, durability at natural wood fiber.
Inuuri ayon sa:
- grain direction: crosswise o lengthwise;
- gamit: construction, packaging, industrial, furniture at structural;
- moisture resistance at adhesive: FBA, FK, FSF, BS, FSF-TV;
- surface: laminated o unlaminated;
- sanding: unsanded, one-side o two-side;
- veneer quality I–IV at Elite;
- species: softwood, birch o hardwood gaya ng poplar.
Hardwood ang birch. Pinahahalagahan ang birch plywood sa mechanical load resistance, bending strength, moisture resistance kapag angkop ang treatment, at durability. Yellowish-white at kung minsan ay pinkish, malinaw ang grain. Operating range ay –40 hanggang +50 °C.
Nakasalalay ang weight sa density at volume. Humigit-kumulang 665 kg/m³ ang birch plywood. Nasa talahanayan ang average sheet mass at volume.
| Kapal (mm) | Sheet parameters | |||||||
|---|---|---|---|---|---|---|---|---|
| 1220×2440 mm | 1525×1525 mm | |||||||
| Sheet/m³ | kg/sheet | kg/m³ | kg/m² | Sheet/m³ | kg/sheet | kg/m³ | kg/m² | |
| 3 | 112 | 5.8 | 650 | 1.9 | 143.3 | 4.5 | 645 | 1.9 |
| 4 | 84 | 7.7 | 647 | 2.6 | 107.5 | 6.1 | 656 | 2.6 |
| 5 | 67.2 | 9.7 | 652 | 3.3 | 86 | 7.6 | 654 | 3.3 |
| 6 | 56 | 11.6 | 650 | 3.9 | 71.7 | 9.1 | 652 | 3.9 |
| 6.5 | 51.7 | 12.6 | 651 | 4.2 | 66.2 | 9.8 | 649 | 4.2 |
| 7 | 48 | 13.5 | 648 | 4.5 | 61.4 | 10.6 | 651 | 4.5 |
| 8 | 42 | 15.5 | 651 | 5.2 | 53.8 | 12.1 | 651 | 5.2 |
| 9 | 37.3 | 17.4 | 649 | 5.8 | 47.8 | 13.6 | 650 | 5.2 |
| 10 | 33.6 | 19.4 | 652 | 6.5 | 43 | 15.1 | 649 | 6.5 |
| 12 | 28 | 23.2 | 650 | 7.8 | 35.8 | 18.1 | 648 | 7.8 |
| 15 | 22.4 | 29 | 651 | 9.7 | 28.7 | 22.7 | 651 | 9.8 |
| 18 | 18.7 | 34.8 | 650 | 11.7 | 23.9 | 27.2 | 650 | 11.7 |
| 20 | 16.8 | 38.7 | 650 | 13 | 21.5 | 30.2 | 649 | 13 |
| 21 | 16 | 40.6 | 650 | 14.6 | 20.5 | 31.7 | 650 | 13.6 |
| 24 | 14 | 46.4 | 650 | 15.6 | 17.9 | 36.3 | 650 | 15.6 |
| 27 | 12.4 | 52.3 | 649 | 17.6 | 15.9 | 4.8 | 649 | 17.5 |
| 30 | 11.2 | 58 | 650 | 19.5 | 14.3 | 45.4 | 649 | 19.5 |
Para sa cut sheet, kalkulahin ang total area at i-multiply sa kg/m² ng kapal. Average lamang ang density at maaaring mag-iba ang aktuwal na sheet at measurement.
Mga madalas itanong
Magkano ang bigat ng plywood sheet?
Nakasalalay sa sukat, kapal, veneer species, moisture at adhesive. Karaniwang mas mabigat ang birch plywood kaysa softwood.
Paano kalkulahin ang bigat?
I-multiply ang area, kapal at densidad. Madalas gamitin ang humigit-kumulang 650 kg/m³ para sa birch plywood.
Bakit magkaiba ang bigat ng magkaparehong plywood?
Naaapektuhan ng thickness tolerance, moisture, veneer grade, adhesive amount at actual wood density.