Insulating composite material and its production method

 

(57) Abstract:

Usage: insulating composite material and process for the production of plates used in the construction of residential, industrial and administrative buildings. The technical result is to obtain a cheap, environmentally friendly thermal insulation composite material. The inventive heat-insulating composite material consists of a mixture of waste paper and wood filler at a ratio of(1:0,3) - (1:3,5) wt. including use as an antiseptic and/or flame retardant clay in relation to the dry weight of the mixture of waste paper and wood filler(1:4) - (1:40). To obtain material waste paper is mixed with water in the ratio(1:4) - (1,6), within 5-30 min they are scolded her, then add wood filler in a ratio by weight of waste paper(0,3:1) - (3,5:1), mix and add the clay in the amount of(1:4) - (1:40) dry mass of waste paper and wood, mix, mold plate, press under a pressure of 10-3- 210-2MPa (1 kgf/cm2) and dried. As waste paper use paper scraps printers, waste cardboard production, net household waste, and as a wood filler - drevesiny. 2 S. and 1 C. p. F.-ly.

The invention relates to heat-insulating composite materials based on waste paper and wood waste and methods of making thermal insulating and finishing materials used in the construction of industrial, administrative and residential buildings.

The prior art compositions and manufacturing methods of composite materials, including waste paper and wood fillers (wood chips, sawdust, etc.,), prepared in different proportions. Known lightweight aggregate, providing high thermal insulation properties of concrete, including the core of the osprey (waste from pulp and paper production) and a shell of a mixture of cement and clay or soluble glass and ash [1]. The lack of filler is its implementation in the form of granules, which does not allow to use it as the basis for forming insulation boards.

Known insulating material in the form of granules of size 20-40 mm, obtained from sewage sludge of pulp and paper production by evaporation and drying at 140-170oC [2]. The disadvantage is the complexity of the technological process of production and use of the material as semi-finished product (Zap invention is a composite material, consisting of waste paper and wood with a ratio of(1:9) - (1:1,5), where the binder used various synthetic resins and liquid glass in the amount of 10 % of the dry mass of waste paper and wood particles, which are introduced in the process of mixing the crushed particles of waste paper and wood [3]. The disadvantage of composite material is a high binder content, which does not allow for the porous structure of the composition and, therefore, high heat and sound insulation characteristics. The disadvantage of the mode of production of material is used in the production process formaldehyde (synthetic) resins that are harmful in the production and operation, as well as their high cost.

The technical result of the invention is to obtain cheap composite material with high thermal insulation properties, the possibility of its formation in the plate for the simple technology, and to enhance the ecological purity of the material and the production process itself.

The invention consists in that the heat-insulating composite material contains, as the closest analogue, the mixture of recycled paper with a wood filler, additives, flame retardants what about the filler is within (1:0,3) - (1:3,5), and as an additive flame retardants and/or antiseptics used clay in the amount of(1:4) - (1:40) in relation to the total dry weight of components.

The method for insulating composite material is that, as the closest analogue, shredded paper and wood filler, mix them, injected flame retardants and/or antiseptics and molded, but unlike most similar analogue before mixing the waste paper pre-soaked and crushed in the aquatic environment when the ratio of the mass of waste paper and water(1:4) - (1:6) within 5-30 min until a homogeneous mass, mixing the waste with wood mass is carried out at the ratio of their masses in the range (1:0,3) with the introduction of clay as a flame retardant and/or an antiseptic in the number(1:4)-(1:40) in relation to the total dry weight of the components, and after molding plates press mixture lightly pressing with a force of 1x10-3-2x10-2MPa, thermoablative and dried.

The method is characterized also by the fact that wrung the molded plates water re-use for soaking paper.

The above ingredients insulating composite material and modes is P> The ratio of waste paper and wood filler in the mixture within(1: 0,3)-(1: 3,5) by dry weight is determined by the fact that at lower content of wood filler in the mixture is less than 0.3 by weight of the waste paper almost gives improved sound and thermal insulation characteristics, will not increase the strength and decorative material properties, but increases its cost. The increasing concentration of waste wood above 1:3,5 reduces the cost of material, but it is not strong enough and starts to break down during transportation. The use of clay(1:4)-(1:40) to the dry weight of the waste paper and waste wood contributes to the formation and increase of the compressive strength and bending, sufficient for the transportation and storage of plates made of material without damage. At the same time clay performs the functions of additives, flame retardants and/or antiseptics.

As starting materials for producing heat-insulating material may be used for secondary raw materials, namely, paper scraps printers, waste cardboard production, net household waste, and as a wood filler - wood waste from very small sawdust to wood chips (shredded).

To obtain Telkom unit with a ratio of mass of water and waste within(4:1)-(6:1) within 5-30 minutes, where she raspisivaetsya the fibers. The ratio of mass of water and waste selected from the assumption that the smaller the amount of water to obtain a homogenous mass, necessary for high-quality molding, requires considerable time and, accordingly, increases the expenditure of time and energy.

When a large amount of water is difficult molding. When mixing time less than 5 min raspushivaniya may fail completely, which reduces the quality of products, and 30 min is sufficient for grinding even quite rough cardboard waste and increase mixing time does not give a noticeable quality improvement raspushivaniya paper.

The mixture of waste paper and wood filler is carried out after the end of the process raspushivaniya paper in the same mixer or separately to form a homogeneous mass.

The reduction in the content of wood filler in the mixture is less than 0.3 by weight of the paper significantly increases the cost of material and practically does not improve sound and thermal insulation properties. The increase of the ratio of the mass of wood filler to 3.5 and more to the weight of the paper significantly reduces the strength of the plates, which makes their transportation and stored the output, pressing and extrusion and rolling. Easy pressing ensures removal of excess water by maintaining strong links between the particles contributing to the achievement of the desired shape of the plates. At a pressure of less than 1x10-3MPa (1 kgf/m2water is too much, what causes large energy consumption during drying and, in addition, may be in breach of shape due to the residual creep mass. The pressure increase above 2x10-2(20 kgf/cm2) practically does not reduce the humidity of the material, but requires more powerful hardware, which increases the cost and, in addition, the elastic aftereffect particles after pressing disrupts communication between the particles of the material and reduces its strength.

The material obtained by the proposed method are investigated in accordance with applicable regulations on control methods of insulating materials according to GOST 17177-87 (ST SEV 5064-85, ST SEV 5065-85) "Materials and products building insulation. Methods of control". Test results issued "Certificate of quality on plates made of composite material based on waste paper and waste wood", according to which products based on waste paper and waste wood are the composite materials must be done in conditions do not allow moisture and damage. When this heat-insulating composite material has the following properties:

1. The density of 195 5 kg/m3.

2. Coefficient of thermal conductivity in the dry state, W/m to not more than 0,0743.

3. Humidity is not more than 8,0 %.

4. Compressive strength at 10% linear deformation of not less than 0.45 MPa (kgf/cm2) (4,5).

5. PH 6,0 0,2.

1. Insulating composite material comprising a mixture of waste paper, wood filler with the addition of flame retardants and/or antiseptics, characterized in that the ratio of the mass of waste paper and pulp filler is within 1 0,3 1 to 3.5, as an additive flame retardants and/or antiseptics used clay in the quantity 1 4 1 40 relative to the total dry weight of components.

2. A method for insulating composite material, including shredding paper and wood filler, mixing, introduction of flame retardants and/or antiseptics and molding the mixture, characterized in that before mixing the waste paper pre-soaked and crushed in the aquatic environment when the ratio of the mass of waste paper and water 1 4 1 6 W at a ratio of 1 0,3 1 to 3.5 with the introduction of clay as a flame retardant and/or an antiseptic in quantity 1 4 1 40 relative to the total dry weight of components and formed from a mixture of the press plate by pressing with a force of 1 to 10-32 10-2MPa, thermoablative and dried.

3. The method according to p. 2, characterized in that deleted when release plates water re-use for soaking paper.

 

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