SU1388407A1 - Compound for producing compression-molded souvenir articles - Google Patents

Abstract

The invention relates to the field of chemical technology, specifically to wood-adhesive compositions for the manufacture of extruded souvenirs from waste wood materials, and can be used in the construction and woodworking industry for the manufacture of small-sized products. The invention makes it possible to reduce the bulk density of the products and to reduce the pressing process due to the fact that for the manufacture of souvenir pressed products a composition containing sawdust is used; water in the following ratio, wt.%: sawdust 36,0-36,5; crushed bur 18.8-19.0; glass unidirectional yarns and fibers 4.20-4.50; sodium carboxymethylcellulose 14.00-18.00; , parafine stearic aerosil 0,15-0,20; water 22.3-26.35. 2 tab. e sl oo 00 00 4:

Description

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The invention relates to chemical technology, specifically to wood and adhesive compositions for the manufacture of extruded sovereign products from waste wood materials, and can be used in the construction and woodworking industry for the manufacture of small-sized products.

The aim of the invention is to reduce the bulk density of products and reduce the pressing process.

The process of manufacturing molded products is carried out as follows.

Dry suspended solids (a mixture of sodium carboxymethylcellulose and paraffinstearine aerosil) are mixed in a mixer with sawdust pre-screened on a sieve with 3x3 mm cells, scrap and glass fiber until a homogeneous mass is obtained. At 18-20 ° C, the required amount of water is poured in and, after thorough mixing, the mass is maintained for 24 hours to mature. Then the articles are molded. In a mold at 210-230 ° C, a pressure of 5-10 MPa, the molding time is 20 minutes. The number of subshirts 1-3. For a known composition, the number of sub-pressings is 4-5.

In tab. 1 shows the formulations for the manufacture of extruded

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407

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products in the table. 2 - comparative characteristics of products.

Claims (1)

Invention Formula The composition for the manufacture of pressed souvenirs, containing sawdust, binder, crushed burr - pressing waste, filaments and glass fibers unidirectional, highly dispersed pyrogenic silica and water, are distinguished by the fact that reduction of the pressing process, as a binder, the composition contains sodium salt of carboxymethylcellulose, and as a highly dispersed pyrogenic silica - parafinitearine aerosil in the following ratio of components, m a.%: Sawdust 36.0-36.5 Ground bald compaction waste 18.8-19.0 Threads and fibers glass unidirectional 4.20-4.50 0 Sodium salt of carboxymethylcellulose Parafinsteari-new aerosil Water 14.00-18.00 0.15-0.20 22.3-26.35 Sawdust Ground shred (press waste) Glass unidirectional threads and fibers, GOST 10727-73 Sodium carboxymethylcellulose Table 1 36.50 37.00 35.50 18.80 18.80 19.00 30.80 20.00 4.20 4.20 4.50 5.00 18.00 19.00 13.50 Component Formulations compositions, wt.X proposed control : 1b. Aerosil Paraffinstearinovy. Aerosil P-ST (TU 88 USSR 228,00185) 0.15 0.18 0.20 0.14 0.22 Starch - - - - - 19.00 Water 26.35 24.82 22.30 20.86 27.28 25.00 Table2 Characteristics Composition i: ijiEi: i: r: Humidity,% 6.9 6.8 6.9 7.3 Body weight, kg / m 685 680 687 865 Moisture absorption, for 48 h,% 7.58 7.48 7.60 7.68 Warping during heat treatment (temperature 80 ° C, time 2 hours, no-no. No- No --and - ..- .., ". and .." ". and. ™ and tcht MV" ( Compiled by V. Bolshunova Editor T. Lazorenko Tehred M. Khodich Corrector I. Musk Order 1547/27 Circulation 434Subscription VNIIPI USSR State Committee for inventions and discoveries 113035, Moscow, Zh-35, Raushsk nab, 4/5 Production and printing company, Uzhgorod, st. Project, 4 Continuation of table 1 Known composition wt.X checklists 0.20