RU2553797C1 - Batten - Google Patents

Abstract

FIELD: construction.

SUBSTANCE: rectangular or square batten has surface ply and inner ply of wood particle-based material. Said surface ply comprises wood flour, polypropylene, polybutadiene and concentrated dye at the following ratio of components, wt %: wood flour - 70-80, polypropylene - 15-25, polybutadiene - 2-4 and concentrated dye 1-3. Batten inner ply comprises 2-10 mm long fibrous wood particles oriented in length and secondary thermoplastic polymer at the following ratio of components, wt %: fibrous wood particles - 70-80 and secondary thermoplastic polymer - 20-30.

EFFECT: higher water resistance (over 1,3 times) and bending strength (over 1,5 times).

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Description

The invention relates to the field of building materials, in particular to a set of moisture-resistant floorboards.

Known moisture-resistant floorboard, which contains a surface layer extending in the horizontal plane, and the inner layer on a wooden base (RU patent No. 2415235, IPC 7 E04F 15/04, 2011).

The disadvantages of this invention are the low mechanical and strength characteristics.

Known terrace board, which contains up to 30% polypropylene, and up to 70% chopped wood, and has an open bottom profile (Magazine "Siberian House", No. 5 (88), May 2011).

The disadvantages of this invention are low physico-mechanical and strength characteristics.

Known floorboard with decorative grooves of a quadrangular shape, which contains a core and a surface layer, the core contains a high-density fiberboard, medium density fiberboard, particleboard or plywood (RU application for invention No. 2004130856, IPC 7 E04F 15/04, 2008).

The disadvantages of this object are low weather resistance, low operational characteristics.

The closest in technical essence is a rectangular or square floorboard containing a surface layer and a filler, the surface layer is made of flexible elastic fiber, and the floorboard filler contains wood fiber. A method of manufacturing a floorboard containing a surface layer and a filler, is that the surface layer is combined with a filler, consisting of a material based on wood fiber, to form a floor element (RU patent No. 23219363, IPC 7 E04F 15/04, 2006).

The disadvantages of the known object are low water resistance and insufficient tensile strength in bending.

The objective of the invention is to increase water resistance by reducing water absorption and increasing the tensile strength in bending.

The technical problem is solved in that the floorboard is rectangular or square, containing a surface layer and an inner layer of a material based on wood particles, according to the invention, the surface layer contains wood flour, polypropylene, polybutadiene and concentrated dye, in the following ratio, wt.%:

wood flour 70-80 polypropylene 15-25 polybutadiene 2-4 concentrated dye 1-3

and the inner layer of the board contains length-oriented wood particles of a fibrous appearance ranging in size from 2 to 10 mm and a secondary thermoplastic polymer, in the following ratio of components, wt.%:

wood particles 70-80 secondary thermoplastic polymer 20-30

The solution to the technical problem allows to increase water resistance by reducing water absorption by more than 1.3 times and increase the tensile strength in bending by more than 1.5 times.

Characteristics of the substances used in the declared object:

180 grade wood flour (GOST 16361-87);

PP1500J grade polypropylene (TU 2211-136-05766801-2006);

polybutadiene [-CH ₂ CH = CHCH ₂ -] _n , a synthetic polymer, a polymerization product of butadiene;

concentrated dyes, for example EverWoods, Dei®TechWPC Dei®Pow WPC, Holcobatch WPC.

wood particles for the inner layer are used from 2 to 10 mm in size, which are obtained by grinding lumpy wood waste and sawmill in two stages: in the first stage, they are crushed with a chipper, in the second stage, grinding is carried out in a hammer mill. The result is woody particles of a fibrous appearance.

A polymer binder for the inner layer is obtained by grinding waste thermoplastic polymers - polyethylene, polypropylene or their copolymers; polyvinyl chloride or copolymers thereof with vinyl acetate; polymethyl methacrylate, polyethylene terephthalate, polystyrene or mixtures thereof. Thermoplastic are called polymers that can soften when heated and recover when cooled.

For a better understanding of the invention provide examples of specific performance.

Example 1

To form a surface layer of a rectangular or square floorboard, components are used in the following ratio, wt.%:

wood flour 75 polypropylene twenty polybutadiene 3 concentrated dye 2

which are mixed and sent to the extruder loading device.

To form the inner layer of a rectangular or square floorboard, components are used in the following ratio, wt.%:

wood particles 75 secondary thermoplastic polymer - polyethylene 25

which are mixed and sent to the extruder loading device. Further, during the joint flow of two melts from the extruder, a floorboard is formed from the inner and surface layers.

Studies on water absorption were carried out according to GOST 4650-80 (ST SEV 1692-79), studies on the ultimate strength in bending were carried out according to GOST 25.604-82.

Examples 2-21 are similar to example 1. The ratio of the components for the formation of the surface and inner layers of the floorboard, as well as its characteristics: water absorption, tensile strength in bending are shown in table 1.

As can be seen from examples of specific performance, the claimed object in comparison with the prototype can increase water resistance by reducing water absorption by more than 1.3 times and increase the tensile strength in bending by more than 1.5 times, and the use of the surface and inner layers of the genital wood waste boards up to 80 wt.% can significantly reduce its cost.

Claims (1)

A rectangular or square floorboard containing a surface layer and an inner layer of wood based material, characterized in that the surface layer contains wood flour, polypropylene, polybutadiene and concentrated dye, in the following ratio, wt. %:
wood flour 70-80 polypropylene 15-25 polybutadiene 2-4 concentrated dye 1-3
and the inner layer of the board contains length-oriented wood particles of a fibrous appearance ranging in size from 2 to 10 mm and a secondary thermoplastic polymer, in the following ratio of components, wt. %:
wood particles 70-80 secondary thermoplastic polymer 20-30