CS237222B1 - Method of wood modification - Google Patents
Method of wood modification Download PDFInfo
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- CS237222B1 CS237222B1 CS812662A CS266281A CS237222B1 CS 237222 B1 CS237222 B1 CS 237222B1 CS 812662 A CS812662 A CS 812662A CS 266281 A CS266281 A CS 266281A CS 237222 B1 CS237222 B1 CS 237222B1
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Abstract
Vynález se týká způsobu modifikace dřeva. Jeho cílem je zvýSení jakosti modifikovaného dřeva. Uvedeného cíle se dosahuje tím, že se dřevo nasycuje vodným roztokem termoreaktivní pryskyřice, suší se a vytvrzuje se v prostředí kapalného nosiče tepla, přičemž sušení a vytvrzování se provodí za vakua při tlaku 40 až 110 mm rtutového sloupce, sušení se provédí při 40 až 85 °C a vytvrzování se děje při 110 ež 140 "C.The invention relates to a method of wood modification. Its aim is to increase the quality of the modified wood. The stated aim is achieved by saturating the wood with an aqueous solution of a thermosetting resin, drying and curing in a liquid heat carrier environment, whereby drying and curing are carried out under vacuum at a pressure of 40 to 110 mm of mercury, drying is carried out at 40 to 85 °C and curing is carried out at 110 to 140 °C.
Description
CnOCOE ÍPEBB3HHH ΜβοόρβτθΗΗβ othochtch κ AepeBOotípadaTHBaromeS προ-MKfflJieHHOCTH, Β ^aCTHOCTH Κ MOíQ0$HKaiíHH ΛΡθ^θΟΗΗΗ. H3BecTeH cnocod MOjui$nKamra jpeBecHHH, BomaiamiSnponuTKy βοληημ pacTBOpOM TepMopeaKTHBHOft cmojm, cynucyh OTBepameHne [i ].CnOCOE ÍPEBB3HHH ΜβοόρβτθΗΗβ othochtch κ AepeBOotípadaTHBaromeS προ-MKfflJieHHOCTH, Β ^ aCTHOCTH Κ MOíQ0 $ HKaiíHH ΛΡθ ^ θΟΗΗΗ. H3BecTeH cnocod MOjui $ nKamra jpeBecHHH, BomaiamiSnponuTKy βοληημ pacTBOpOM TepMopeaKTHBHOft cmojm, cynucyh OTBepameHne [i].
Handojree 0πη3κημ κ npejyioxeHHOMy ηβληθτοη cnocodΜΟΛΗφΗΚβΠΗΠ flpeBeCHHH, ΒΚΖΠΟΗΗΕΜΙΗίί ΠρΟΠΗΤΚγ ΒΟΛΗΗΜ pa-cTBOpOM TepMopeaKTHBHog cmojih, cyuncy η οτβθρκλθηηθ bcpejie TOKoro τθπλοηοοητθλη [δ], Ηθλοοτβτκομ η3βθοτηηχ cnocotíOB ηβληβτοη ηη3κοθKanecTBO MOín$niíHpoBaHHO0 .npeBecnHH, otíycjiOBjíeHHoeΒΛΗΗΗΗθΜ 0CT3TK0B BJiarn Ha nponecc ΠΟΗΚΚΟΗΛθΗΟΗΙξΗΙί. ΠθΛΒΧ) H30dp6T6HHH ΗΒΛΗΘΤΟΗ ΠΟΒΜΠβΗΗΒ KaneCTBaΜΟΑΗφΗΐΡίρΟΒΘΗΗΟίί ^φΘΒβΟΗΗΗ, 3το socTHraeTca τβΜ, ητο cyuncy η οτΒθρκΛθΗΗβ βορβΛθ κηλκογο τθπλοηοοζτθλη oeyiuecTBJíHJOT πολ BaicyyMOMπρπ οοτβτοηηομ jčBJíeHim 40-110 mm ρτ.οτ., πρκπθΜ cymaTnpn 40-85°C, a oTBepswaioT npn II0-I40°C.Handojree 0πη3κημ κ npejyioxeHHOMy ηβληθτοη cnocodΜΟΛΗφΗΚβΠΗΠ flpeBeCHHH, ΒΚΖΠΟΗΗΕΜΙΗίί ΠρΟΠΗΤΚγ ΒΟΛΗΗΜ PA cTBOpOM TepMopeaKTHBHog cmojih, cyuncy η οτβθρκλθηηθ bcpejie τθπλοηοοητθλη Tokoro [δ] Ηθλοοτβτκομ η3βθοτηηχ cnocotíOB ηβληβτοη ηη3κοθKanecTBO Moine $ niíHpoBaHHO0 .npeBecnHH, otíycjiOBjíeHHoeΒΛΗΗΗΗθΜ 0CT3TK0B BJiarn Ha nponecc ΠΟΗΚΚΟΗΛθΗΟΗΙξΗΙί. ΠθΛΒΧ) H30dp6T6HHH ΗΒΛΗΘΤΟΗ ΠΟΒΜΠβΗΗΒ KaneCTBaΜΟΑΗφΗΐΡίρΟΒΘΗΗΟίί ^ φΘΒβΟΗΗΗ, 3το socTHraeTca τβΜ, ητο cyuncy η οτΒθρκΛθΗΗβ βορβΛθ κηλκογο τθπλοηοοζτθλη oeyiuecTBJíHJOT πολ BaicyyMOMπρπ οοτβτοηηομ jčBJíeHim ρτ.οτ. 40-110 mm, πρκπθΜ cymaTnpn 40-85 ° C, II0 oTBepswaioT npn-I40 ° C .
Cymica npn HH3KOíi HanajitHoft TeMnepaType πολ BaicyyMOMΠ03Β0ΛΗΘΤ npOBOBHTB yflaJieHHe ΒΟΛΗ (HJM flpyroro paCTBO-PHTejrc) H3 ΛρθΒθΟΗΗΗ B yCHOBHHX, ΠρΗ KOTOPHX 0típa30Ba-ηηθ nojHMepHoro npojyKTa Ha noBopxHOCTH h BHyrpu ΗΘημθθτ MecTo. OcHOBHaa Macca βολή (λο οολθρ^ηηη b flpe-βθοηηθ BJiara ηθ dojiee 30-25$) ynaJMeTcn npn HanajitHofi 237222 -2-Cymica npn HH3KOii HanajitHoft TeMnepaType πολ BaicyyMOMΠ03Β0ΛΗΘΤ npOBOBHTB yflaJieHHe ΒΟΛΗ (HJM flpyroro paCTBO-PHTejrc) H3 ΛρθΒθΟΗΗΗ B yCHOBHHX, ΠρΗ KOTOPHX 0tpa30Ba-ηηθ nojHMepHoro npojyKTa Ha noBopxHOCTH h BHyrpu ΗΘημθθτ MecTo. H H a ca ca ca ca ca ca ca ca ca ca ca ca ca ca ca ca ca ca ca na na na na na na na na na na na aj aj aj aj aj 72
TeMnepaType „ saTewi ysajieHHH CBHsaHHOfi BJiara epacTBopHTejiH TeMnepaTypa τθπλοηοοητθλιη noBuinaeTCH BaI0-I5°C cpu hoctohhhom BaxyyMe, h cyniaT po bjeukhocth8-10%, no3boJímámeft nepeSra κ nponeccy οτβθρκ^θηεη cmojhB φβΒθΟΗΗβ» SaTBM DpOBOSKTCH ΟΤΒβρ3Κ£βΗ0β CMOJH B flpe~Becnne πρκ TeMnepaType TenjioHOCHTeJiH II0-I40°C. Upme-ΗΘΗΗβ HHpKyJDmÉ® TeiLTOHOCHTeJIH OtíecneHHBaeT 3φφβΚΤΗΒΗΗ0ΒΛΗΓΟΤβΠΛΟΠβρβΗΟΟ -,TeMnepaType "saTewi ysajieHHH CBHsaHHOfi BJiara epacTBopHTejiH TeMnepaTypa τθπλοηοοητθλιη noBuinaeTCH BaI0-I5 C cpu hoctohhhom BaxyyMe h after cyniaT bjeukhocth8-10% no3boJímámeft nepeSra nponeccy οτβθρκ κ ^ θηεη cmojhB φβΒθΟΗΗβ» SATB DpOBOSKTCH ΟΤΒβρ3Κ £ βΗ0β CMOJH B Flpe ~ Becnne πρκ TeMnepaType TenjioHOCHTeJiH II0-I40 ° C. Upme-ΗΘΗΗβ HHpKyJDmÉ® TeiLTOHOCHTeJIH OtícneHHBaeT 3φφβΚΤΗΒΗΗ0ΒΛΗΓΟΤβΠΛΟΠβρβΗΟΟ -,,
ΠρΗΜβρ I 0dpa3qu speBecHHH pa3MepoM 20x60x100 mm9 BucyiueH-Hae po BJiaxHOCTH 8±2%, 3arpyxaioT b aBTooaB, npormTH-BaiOT BOJ5ÍHM paCTBOpOM φβΗθ;ΐφθρΜ37ΙΒΛθΓΗΑΗθ2 CMOJH, BnacTHOGTH φβΗΟΛΟοπΗρτοΒ, no MeTojy BaKyyM-joaBJíeHHe.Even ΠρΗΜβρ 0dpa3qu speBecHHH pa3MepoM 20x60x100 MM9 BucyiueH Hae BJiaxHOCTH after 8 ± 2%, b 3arpyxaioT aBTooaB, npormTH-BaiOT BOJ5ÍHM paCTBOpOM φβΗθ; ΐφθρΜ37ΙΒΛθΓΗΑΗθ2 CMOJH, BnacTHOGTH φβΗΟΛΟοπΗρτοΒ, well-MeTojy BaKyyM joaBJíeHHe.
SaTeM nponuTaHHyK) speBecHHy b ΓβρΜβτηηβοκΗ 3aKpHT0MaBTOKJiaBe odpadaTHBaioT rajipo$odHHM τθοοηοοητθλθμ (Macjio)πρκ ocTaTonHOM λββλθηηη 40 mm ρτ.οτ. η ποοτοΗΗΗοίί nap-KyjiHnm Ten.ro hoch Tejn. TeMnepaTypa TemtoHOCHTejra Ha nep-boíí crasím cynnos cocTaBJweT 40°C. B nponecce cynnoi ocy-mecTBJBWT kohtpojib 3a TeMnepaTypoS.TenjiOHOCHTejK. ΠρΟΛΟΜΗΤΘΛΒΗΟΟΤΒ CyiUKH Ha nepBOfí CTajíHH ΛΟ bjihs-hocth «upeBecHHH 25-30% cocTaBJíneT 2 η. Πο λοοτηκθηηηyKasaHHOÍi bjeukhocth odpa3noM TeMnepaTypy TenjtoHOCHTejranojWHMaioT po 70°C. CymaT po BJiastHOCTH 6-8% πρκ ποοτοηη-hom BaxyyMe h nHpKyjnmHH. ΠροΛΟΛΚΗΤβτπ,κοοτι, cyinrai HaBTopoS cTajw I n 20 mhh. OTBepwHne φβΗθ.ποοιΐΗρτοΒ bApeBecHHe ocymecTBJímoT npa II0°C b τθηθηηθ 2 n. CTenemOTBepsweHHH φβΗΟΛΟοηηρτοΒ 97,2% πρκ bjkukhocth BHcymeH-hoíí MOflH$0nnpoBaHHofi ípeBecHHH 3,6%. Odman irposojEKH-TeJH>HOCTi> nponecca 5 n 20 mhh. Ba3yajn>HH0 ocmotp jjpe-BecHHH noKa3a/i oTcyTCTBue KopotíJteHun h TpeniHH. ΜοληΦη-HHpoBaHHaa jjpeBecHHa nomyneHa βηοοκογο KanecTBa. ΠρΗΜβρ 2SaTeM nponTaHHyK) speBecHHy b ΓβρΜβτηηβοκΗ 3aKpHT0MaBTOKJiaBe odpadaTHBaioT rajipo $ odHHM 40 mm ρτ.οτ. η ποοτοΗΗΗοίί nap-KyjiHnm Ten.ro hoch Tejn. THEME TYPE OF THEMHOCH THERAPY HA DOES NOT CRACK CINDING COCTABLE 40 ° C. B nponecce cynnoi ocy-mecTBJBWT kohtpojib 3a TeMnepaTypoS.TenjiOHOCHTejK. ΠρΟΛΟΜΗΤΘΛΒΗΟΟΤΒ CyiUKH Ha nepBOfí CTajíHH ΛΟ bjihs-hocth «upeBecHHH 25-30% cocTaBJíneT 2 η. Πο λοοτηκθηηηyKasaHHOÍi bjeukhocth odpa3noM TeMnepaTypes ofThisThermalWHMaioT up to 70 ° C. CymaT after BJiastHOCTH 6-8% πρκ ποοτοηη-hom BaxyyMe h nHpKyjnmHH. ΠροΛΟΛΚΗΤβτπ, κοοτι, cyinrai HaBTopoS cTajw I n 20 mhh. OTBepwHne φβΗθ.ποοιΐΗρτοΒ bApeBecHHe ocymecTBJímoT npa II0 ° C b τθηθηηθ 2 n. Odman irposojEKH-TeJH > HOCTi > nponecca 5 n 20 mhh. Ba3yajn> HH0 ocmotp jjpe-BecHHH noKa3a / i oTcyTCTBue KopotíJteHun h TpeniHH. -ΟληΦη-HHpoBaHHaa jjpeBecHHa nomyneHa βηοοκογο KanecTBa. ΠρΗΜβρ 2
Cyrany h oTBepwHHe φβΗΟΛΟοηπρτοΒ b φθβθοηηθnpOBOflHT nos BaxyywM c οοτητοηηημ sasJíeimeM 75 mm ρτ.οτ.Cyrany h oTBepwHHe φβΗΟΛΟοηπρτοΒ b φθβθοηηθnpOBOflHT nos BaxyywM c οοτητοηηημ sasJíeimeM 75 mm ρτ.οτ.
TeMnepaTypa TenroHOCHTejm Ha nepBofi cTasmi 75°C, 237222 -3- προλολμητθλ&ηοοτβ 2 η 30 mhh; Ha BTopoft cTajqm TeMne-paTypa 85°C, BpeMH I h 30 mhh. TeMnepaTypa OTBepameHHHI25-I30°C, BpeMH I H 40 mhh. CTenern» OTBepaweHHH97,73# npn BJEUKHOCTH MOJ]JI$HmipOBaHHOň flpeBeCHHH 4,2#.Oómee BpeMH cymKH η oTBepjKaeHHH 5 h 40 mhh. BH3yajn>HuftOCMOTp flpeBeCHHH nOKa3aJI OTCyTCTBHe ΚΟροόΛβΗΗΗ Η τρθ-H(HH. MOJIÍI$HHHpOBaHHaH ίρβΒβΟΗΗΗ HOJiyHeHa ΒΗΟΟΚΟΓΟ Ka-necTBa. ΠρΗΜβρ 3 OTjiHHaeTCH οτ πρΗΜβροΒ I h 2 τβΜ, hto cymKy hOTBepSfleHHe φβΗΟΛΟΟΠΗρΤΟΒ B φβΒθΟΗΗβ ΠρΟΒΟΛΗΤ ΠΟΛ oc-τβτο^ΗΗΜ jjaBJíaHHeM 110 mm ρτ.οτ. TeMnepaTypa τβπΛΟΗΟ-CHTeJiH Ha nepBofi cTajpm 75°C b τβπβΗΗβ 3 ή 20 mhh, HaBTopofi cTajurn cymKH - TeMnepaTypa 85°C, BpeMH 2 h 30 mhh.TeMnepaTypa οτΒβρ^π,βΗΗΗ I35-I40°C b τβκβΗΗβ I η. Οτβ-ΠβΗΪ. OTBepjRfleHHH 98,2# npH BJEUKHOCTH MOJ(H$HnHpOBaHHOfljpeBecHHH 3,8#; oómee BpeMH cyruraa h OTBepameHHH 7 h.BH3yajn»HHfi ocmotp jpeBecHHH noKasaji OTCyTCTBHe κοροό-ΗβΗΗΗ H TpemHH. MOSH$HIÍHpOBaHHaH φβΒβΟΗΗβ ΠΟ^ΗΘΗββηοοκογο KanecTBa.TeMnepaTeroHOCHTejm Ha nepBofi cTasmi 75 ° C, 237222 -3- προλολμητθλ & ηοοτβ 2 η 30 mhh; Ha BTopoft cTajqm TeMne-paTypa 85 ° C, BpeMH I h 30 mhh. TeMnepa Type OTBepameHHHI25-I30 ° C, BpeMH IH 40 mhh. CTenern »OTBepaweHHH97,73 # npn BJEUKHOCTH MOJ] JI $ HmipOBaHHOn flpeBeCHHH 4.2 # .Oomee BpeMH cymKH η oTBepjKaeHHH 5h 40mhh. BH3yajn> HuftOCMOTp flpeBeCHHH nOKa3aJI OTCyTCTBHe ΚΟροόΛβΗΗΗ Η τρθ-H (HH. MOJIÍI $ HHHpOBaHHaH ίρβΒβΟΗΗΗ HOJiyHeHa ΒΗΟΟΚΟΓΟ Ka-necTBa. ΠρΗΜβρ 3 OTjiHHaeTCH οτ πρΗΜβροΒ i h 2 τβΜ, HTO CYMK hOTBepSfleHHe φβΗΟΛΟΟΠΗρΤΟΒ B φβΒθΟΗΗβ ΠρΟΒΟΛΗΤ ΠΟΛ alpha-τβτο ^ ΗΗΜ jjaBJíaHHeM 110 mm M M τ M nep nep CH nep nep nep nep nep nep nep 75 75 75 75 75 ° ° T T nep 35 35 35 35 35 35 35 35 35 35 35 35 35 35 35 35 η. Οτβ-ΠβΗΪ. OTBepjRfleHHH 98.2 # NPH BJEUKHOCTH MOJ (H $ HnHpOBaHHOfljpeBecHHH # 3.8; oómee BpeMH cyruraa h OTBepameHHH h.BH3yajn 7 »HHfi ocmotp jpeBecHHH noKasaji OTCyTCTBHe κοροό-ΗβΗΗΗ H TpemHH. MOSH $ HIÍHpOBaHHaH φβΒβΟΗΗβ ΠΟ ^ ΗΘΗββηοοκογο KanecTBa.
TaKHM oópa3OM, cyrnna flpeBecHHH, προπΗΤβΗΗΟδ chh-ΤβΤΗΗβΟΚΗΜΗ ΟΜΟΛΗΜΗ, Η ΟΤΒβρ^βΗΗβ CMOJH Β Ηβ® ΟόθΟΠβ-HHBaiDT HOJijnieHHe ΜΟΑΗφΗηΗρΟΒβΗΗΟ® ΑρβΒβΟΗΗΗ ΒΗΟΟΚΟΓΟKaaecTBa óes TpemHH η κοροόπβΗΗΗ, c ηη3κημ cojuspxaHHeMΒΛΗΓΗ (οτ 3 ΛΟ 4,5#), BHCOKO® ΟΤβΠΘΗΗΟ ΟΤΒβρ)Κ£βΗΗΗ CMO-λη (97-98,5#). nponecc ooymecTBJíHeTCH β repMeTHSHpoBaH-hom oóopyaoBaHHH, η το cnocoócTByeT ymyHineHHio oxpaHHOKpyaarane® cpejm h HCKjnoqaeT BHjiejieHHe tokchhhhx Be-rne ctb b aTMOC$epy. 237222 -4-Takhte oópa3OM, cyrnna flpeBecHHH, CHH-προπΗΤβΗΗΟδ ΤβΤΗΗβΟΚΗΜΗ ΟΜΟΛΗΜΗ, ^ Η ΟΤΒβρ βΗΗβ CMOJH Β Ηβ® ΟόθΟΠβ-HHBaiDT HOJijnieHHe ΜΟΑΗφΗηΗρΟΒβΗΗΟ® ΑρβΒβΟΗΗΗ ΒΗΟΟΚΟΓΟKaaecTBa OES TpemHH η κοροόπβΗΗΗ c ηη3κημ cojuspxaHHeMΒΛΗΓΗ (3 οτ ΛΟ # 4.5) BHCOKO® ΟΤβΠΘΗΗΟ ΟΤΒβρ ) O £ βΗΗΗ CMO-λη (97-98,5 #). nponecc ooymecTB íHeTCH β repMeTHSHpoBaH-hom oopyaoBaHHH, η το cnocoócTByeT ymyHineHHio oxpaHHOKpyaarane® cpejm h HCKjnoqaeT BHjiejieHHe tokchhhhx Be-rne ctb b aTMOC $ epy. 237222 -4-
ΦΟΡΜΪΛΑ H30BPETEHHHΦΟΡΜΪΛΑ H30BPETEHHH
Cnocod speBecnHH, BKjnonamqHÍi προππτκγ BOflHHM paeTBOpOM TepMOpeaKTHBHOfi ΟΜΟΛΗ, CyiIIKy H ΟΤΒθρ-«ΑθΗΗΘ B cpejie 2®£Κ0Γ0 TeHJIOHOCHTeJlH, ΟΤΛΗΗΗΒ-m H fi C Η ΤΘΜ, HTO, C IXeJEbK ΠΟΒΕΠΠβΗΚΗ KaneCTBa MOSH$H·unpoBaHHofi jpeBecHHH, cyuiKy h oTBepwHKe b cpese κο-κογο TemioHocHTe^a ocymecTBJMBT nos BaicyyMOM npn ocia-tohhom saBjíeHHH 40-110 mm ρτ.οτ., npzneM cyuucy ocyme-ctbshiot npn 40-85°C, a OTBepoerae - npn II0-I40°C. 237222 5 AHHOTAUHfl H30dpeTeHEe OTHOCHTOfl K ClIOCOÓy MOJÍH$ZKaHHIÍ flpe-ΒβΟΗΗΗ. Iíejn. Η30όρθτθΗΜ - noBiinierae KaqecTBa Mojjji$imH~pOBaHHOfi flpeBeCHHH. yKa3aHHafl nejn> uocTuraeTCH τθμ, ψγο ocymecTBJíHioTηρΟΠΗΤΚγ φβΒΘΟΗΗΜ BOJJHHM paCTBOpOM TepMOpeaKTHBHOft CMO—jih, cyniKy η οτΒβρχβθΗΗβ b cpejie χηλκογο τθπλοηοοητθλη,πρπ 3 tom cyinKy h oTBepa^eHne προβοαητ πολ BaxyyMOM npaοοτβτοηηομ jiaBJíeHira 40-H0 mm ρτ.οτ., cynncy ocymecTBJíH-κ)Τ npn 40-85°C, a OTBepamemie - npn II0-I40°C. 237222Cnocod speBecnHH, BKjnonamqHÍi προππτκγ BOflHHM paeTBOpOM TepMOpeaKTHBHOfi ΟΜΟΛΗ, CyiIIKy H ΟΤΒθρ- «B ΑθΗΗΘ cpejie 2® £ Κ0Γ0 TeHJIOHOCHTeJlH, ΟΤΛΗΗΗΒ-C m H fi Η ΤΘΜ, HTO, C IXeJEbK ΠΟΒΕΠΠβΗΚΗ KaneCTBa MOSH $ H · unpoBaHHofi jpeBecHHH, cyuiKy h oTBepwHKe b cpese κο κογο TemioHocHTeα and ocymecTBJMBT nose BaicyyMOM npn ocia-hoHeHHH 40-110 mm ρτ.οτ., n cyucyte-ctbshiotnpn 40-85 ° C, and OTBepoerae npn II-I40 ° C. 237222 5 AHHOTAUHfl H30dpeTeHEe OTHOCHTOfl K ClIOCOÓy MY MY ZKaHHIÍ flpe-ΒβΟΗΗΗ. Iíejn. Ό30όρθτθΗΜ - noBiinierae KaqecTBa Mojjji $ imH ~ pOBaHHOfi flpeBeCHHH. yKa3aHHafl select Latest> uocTuraeTCH τθμ, ψγο ocymecTBJíHioTηρΟΠΗΤΚγ φβΒΘΟΗΗΜ BOJJHHM paCTBOpOM TepMOpeaKTHBHOft CMO-south cynic η οτΒβρχβθΗΗβ b cpejie χηλκογο τθπλοηοοητθλη, πρπ 3 cyinKy that h ^ oTBepa eHne προβοαητ πολ BaxyyMOM npaοοτβτοηηομ jiaBJíeHira 40 mm ρτ.οτ. H0, cynncy ocymecTBJíH-κ ) Τ npn 40-85 ° C, and OTBepamemia - npn II0-I40 ° C. 237222
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CS812662A CS237222B1 (en) | 1981-04-07 | 1981-04-07 | Method of wood modification |
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| Application Number | Priority Date | Filing Date | Title |
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| CS812662A CS237222B1 (en) | 1981-04-07 | 1981-04-07 | Method of wood modification |
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| Publication Number | Publication Date |
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| CS266281A1 CS266281A1 (en) | 1984-06-18 |
| CS237222B1 true CS237222B1 (en) | 1985-07-16 |
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| CS812662A CS237222B1 (en) | 1981-04-07 | 1981-04-07 | Method of wood modification |
Country Status (1)
| Country | Link |
|---|---|
| CS (1) | CS237222B1 (en) |
-
1981
- 1981-04-07 CS CS812662A patent/CS237222B1/en unknown
Also Published As
| Publication number | Publication date |
|---|---|
| CS266281A1 (en) | 1984-06-18 |
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