Platelike thermal insulation material made from recycled and environmentally friendly raw materials

Abstract

The present invention relates to thermal insulation materials, particularly to environmentally friendly thermal insulation materials, manufacturing of which involves recycled raw materials and hemp fibres. The thermal insulation material described in the invention further comprises bi-component binder and conservation additive.

Claims

1. A thermal insulation material comprising crushed recycled raw material, hemp fibres and a bi-component binder, wherein the thermal insulation material additionally containing a preservation additive that comprises sulphamidic acid, aluminium hydroxide and silver and wherein the crushed recycled raw material is crushed wastepaper, glossy paper, magazines, laminated paper, books, cardboard, napkins, packaging, paper coffee cups, egg cartons, as well as plastic, particularly polyethylene, and iron, aluminium particles, wherein the crushed recycled raw material comprises 50% of the total weight of the thermal insulation material, hemp fibres comprise 20% of the total weight of the thermal insulation material, the bi-component binder comprises 24.5 to 26.5% of the total weight of the thermal insulation material and the preservation additive comprises 3.5 to 5.5% of the total weight of the thermal insulation material, and wherein the length of hemp fibres is 3 to 10 mm.

2. The thermal insulation material according to claim 1, wherein the length of fibres of the crushed recycled raw material is 2 to 6 mm.

3. The thermal insulation material according to claim 1, wherein the bi-component binder consists of a polyester fibre core and a sheath of ethylene/vinyl acetate copolymer or other organic copolymer of ethylene with polar comonomer, especially acrylate(s).

4. (canceled)

5. The thermal insulation material according to claim 1, wherein the length of the bi-component binder fibres is 6 to 40 mm.

6. (canceled)

7. The thermal insulation material according to claim 1, wherein the thermal insulation material is in a form of plate in thickness of 50 to 250 mm.

8. The thermal insulation material according to claim 1, wherein thermal conductivity in a range of 0.036 to 0.040 W/mK.

Description

BRIEF DESCRIPTION OF THE ACCOMPANYING DRAWINGS

[0011] FIG. 1 illustrates sectional view of the thermal insulation material.

EXAMPLES FOR WORKING OF THE INVENTION

Example 1

[0012] FIG. 1 illustrates a thermal insulation material plate in thickness of 150 mm, which comprises 50% of recycled raw material obtained from crushed glossy paper, magazines, laminated paper, books, cardboard, napkins, paper coffee cups, Tetra Pak, egg cartons, polyethylene, iron and aluminium folium, the length of fibres of which variates from 2 to 6 mm; 20% of hemp fibres, the length of fibres of which variates from 3 to 10 mm, 25% of bi-component binder consisting of polyester fibre core and a sheath of ethylene/vinyl acetate copolymer, the length of fibres of which variates from 6 to 40 mm and 5% of preservative additive comprising sulphamidic acid, aluminium hydroxide and silver. The thermal conductivity of the insulation material is 0.038 W/mK.

Example 2

[0013] The working of the invention is possible also as a thermal insulation material plate in thickness of 50 to 250 mm, which comprises 50% of recycled raw material obtained from crushed wastepaper, glossy paper, magazines, laminated paper, books, cardboard, napkins, packaging, paper coffee cups, Tetra Pak, egg cartons, plastic, polyethylene, iron and aluminium folium, the length of fibres of which variates from 3 to 5 mm; 20% of hemp fibres, the length of fibres of which variates from 5 to 8 mm, 26% of bi-component binder consisting of polyester fibre core and a sheath of ethylene/vinyl acetate copolymer, the length of fibres of which variates from 10 to 30 mm and 4% of preservative additive comprising sulphamidic acid, aluminium hydroxide and silver. The thermal conductivity of the insulation material is 0.036 to 0,040 W/mK.

Example 3

[0014] Another example of working of the invention is a thermal insulation material plate in thickness of 50 to 250 mm, which comprises 50% of recycled raw material obtained from crushed wastepaper, glossy paper, magazines, laminated paper, books, cardboard, napkins, packaging, paper coffee cups, Tetra Pak, egg cartons, plastic, polyethylene, iron and aluminium folium, the length of fibres of which variates from 4 to 5 mm; 20% of hemp fibres, the length of fibres of which variates from 6 to 7 mm, 24.5% of bi-component binder consisting of polyester fibre core and a sheath of ethylene/vinyl acetate copolymer, the length of fibres of which variates from 20 to 25 mm and 5.5% of preservative additive comprising sulphamidic acid, aluminium hydroxide and silver. The thermal conductivity of the insulation material is 0.036 to 0,040 W/mK.