1. Lub ntsiab lus thiab cov qauv tsim
Plywood yog cov khoom vaj huam sib luag tsim los ntawm kev sib txuas cov txheej txheem ntawm cov ntoo veneer nrog cov nplaum nyob rau hauv tshav kub thiab siab. Nws cov yam ntxwv muaj xws li:
Layer Count: Feem ntau ib qho khib ntawm plies (3, 5, 7, lossis ntau dua) kom ua tiav kev tsim kho thiab txo kev sib tw
Grain Orientation: Cov khaubncaws sab nraud povtseg yog taw qhia nrog cov nplej perpendicular (90℃cross-band tsim), muab cov khoom sib npaug ntawm ob qho kev qhia
Cov Cheebtsam: Muaj lub ntsej muag, nraub qaum, thiab sab hauv cov txheej txheem
2. Cov txheej txheem tsim khoom
Kev npaj veneer: veneers yog tsim los ntawm kev txiav los yog hlais cov cav rau hauv cov ntawv txuas ntxiv
Drying and Adhesive Application: Veneers yog qhuav thiab coated nrog nplaum; Adhesive hom txiav txim siab noo noo ntsuas ntsuas
Lay-Txhim Siab thiab Kub Kub: Cov txheej yog sib sau ua ke nrog ntoo khaub lig- kev taw qhia cov nplej thiab sib sau ua ke hauv qhov ntsuas kub thiab siab
3. Adhesives thiab Durability Class
Qib Adhesive Hom Daim Ntawv Thov
Sab hauv Urea-formaldehyde (UF) Qhuav hauv tsev ib puag ncig
Sab nrauv Phenol-formaldehyde (PF) Moisture-resistant; haum rau sab nraum zoov lossis ntub dej
Cov qauv sib txawv txhais cov chav kawm tshwj xeeb, xws li APA's Exterior / Exposure 1 lossis EN 314 Chav Kawm 1–3.
4. Kev faib ua feem thiab kev siv
4.1 Los ntawm Kev Siv thiab Kev Tsim Kho
Qauv Plywood
Siv rau kev thauj khoom- cov ntawv thov xws li phab ntsa sheathing, subflooring, thiab ru tsev decking. Hauv North America, cov qhab nia feem ntau suav nrog CDX (C- qib ntsej muag, D- qib rov qab, cov nplaum sab nrauv). Ua raws li APA lossis PS 1 / PS 2 tus qauv.
Hardwood Plywood
Lub ntsej muag veneers ua los ntawm ntoo qhib, maple, birch, los yog lwm yam hardwoods; core feem ntau poplar los yog composite. Siv rau rooj tog, txee, thiab sab hauv millwork.
Marine Plywood
Ua nrog phenolic nplaum thiab tsis muaj dab tsi -cov tub ntxhais siv dawb. Ua tau raws li cov qauv xws li BS 1088. Haum rau kev tsim lub nkoj, chaw nres nkoj, thiab siab - qhov chaw noo noo.
MDO (Medium Density Overlay)
Features ib tug resin-impregnated fiber ntawv nto fused nyob rau hauv tshav kub thiab siab. Qhov txawv ntawm HDO (High Density Overlay) los ntawm qhov ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom. Cov ntawv thov feem ntau suav nrog kev ua vaj tse pob zeb, kos npe sab nraum zoov, thiab vaj tsev vaj tse.
4.2 Veneer Qib (APA Standard, North America)
Nqe lus piav qhia
N Tsis muaj pob tw; du nto; qib siab tshaj
Ib tug du, paintable; tso cai kho me me
B Cov pob me me thiab cov ntxhia streaks tso cai
C Knots txog li 1.5 nti; rau cov uas tsis yog- pom qhov chaw
D Cov pob txha loj thiab qhov tsis xws luag; tsis yog rau qhov chaw raug
5. Cov yam ntxwv ua tau zoo
Dimensional Stability: Hla- laminated tsim ua rau txo qis kev nthuav dav, kev cog lus, thiab kev sib tw piv rau cov khoom ntoo ntawm qhov sib npaug
Crack Resistance: Ntug thiab xaus tiv thaiv kev sib cais thaum ntsia lossis raug kev ntxhov siab
Standardized Dimensions: Common vaj huam sib luag loj: 1220 × 2440 mm (4 × 8 ko taw); thicknesses feem ntau yog los ntawm 3 hli mus rau 30 hli
6. Cov Qauv thiab Ntawv Pov Thawj (Qhov txawv ntawm cheeb tsam)
Plywood cov qauv sib txawv raws cheeb tsam. Cov txheej txheem tseem ceeb suav nrog:
North America: APA - Lub Koom Haum Ntoo Ntoo; PS 1 / PS 2 cov qauv qauv
Cov teb chaws Europe: EN 314 (kev sib cog lus zoo), EN 636 (chaw pabcuam), EN 13986 (cov khoom tshwj xeeb)
International: BS 1088 (marine plywood), JAS (Japanese Agricultural Standard, dav siv nyob rau hauv Nyiv thiab Southeast Asia)