FIELD: process engineering.
SUBSTANCE: invention relates to woodwork. Wood-fibre plate comprises wood fibres, polyacrylamide resin representing an amphoteric-ionic resin containing monomers with cation groups and monomers with anion groups related to 7:3 - 3:7 in molar ratio that features molecular weight of 800000 to 3000000, and cationic paraffin. Wood-fibre board production comprises application of suspension with concentration of solids of 2-3 wt % and pH 3-5 and addition of polyacrylamide resin and paraffin to said suspension.
EFFECT: higher strength of and water resistance.
3 ex, 1 tbl, 4 cl
| Title | Year | Author | Number |
|---|---|---|---|
| POLLUTION-FREE HIGH-DENSITY FIBER BOARD PRODUCED BY WET PROCESS | 2009 |
|
RU2440235C2 |
| COMPOSITION FOR FABRICATING FIBER BOARDS | 2001 |
|
RU2186807C1 |
| USE OF A POLYMER PRODUCT TO REGULATE THE FORMATION OF SEDIMENTS IN THE PRODUCTION OF PAPER OR CARDBOARD | 2017 |
|
RU2750870C2 |
| BROKEN DISPERSION FOR HYDROPHOBISING LIGNOCELLULOSIC MATERIAL | 2016 |
|
RU2665517C9 |
| COMPOSITION FOR WOOD-FIBER PLATES | 1989 |
|
RU2016020C1 |
| PAPER PRODUCTION PROCESS | 1996 |
|
RU2147058C1 |
| OLEFIN-CONTAINING COMPOSITION FOR PRODUCING WOOD MATERIALS, USE OF OLEFINS TO ENDOW CRUDE WOOD MATERIALS WITH HYDROPHOBICITY AND METHOD OF PRODUCING WOOD MATERIALS | 2009 |
|
RU2492196C2 |
| METHOD OF PRODUCING PLATE COMPOSITE MATERIAL FROM LIGNOCELLULOSES | 2008 |
|
RU2404048C2 |
| FIBREBOARD MANUFACTURING PROCESS | 0 |
|
SU1472546A1 |
| SOFTENER COMPOSITION | 2016 |
|
RU2700056C1 |
