METHOD OF BENEFITING FROM WASTE POLYURETHANE FOAM MATERIAL AS AN INPUT MATERIAL IN PRODUCTION OF A COMPOSITE MATERIAL AND COMPOSITE MATERIAL PRODUCED WITH THIS METHOD

Abstract: This invention is related to the method of benefiting from waste polyurethane foam material which is one of the used refrigerator material as an input material in production of a composite material, and the composite material produced with this method. The pieces, attained by grounding the polyurethane foam materials are compressed under the mechanical pressure and with the effect of the heat and bounded to the polyurethane bond former. A mixture attained by breaking into pieces the thermoplastic-based cardboard boxes used in boxes of beverages is also added to the polyethylene lot to increase the mechanic durability of the product.

Description: METHOD OF BENEFITING FROM WASTE POLYURETHANE FOAM MATERIAL AS AN INPUT MATERIAL IN PRODUCTION OF A COMPOSITE MATERIAL AND COMPOSITE MATERIAL PRODUCED WITH THIS METHOD This invention, is related to the method of benefiting from waste polyurethane foam material which is one of the used refrigerator material as an input material in production of a composite material and the composite material produced with this method. As comfort in the society increases, certain durable consumption goods, especially the refrigerator salvage will be arising large quantities and the continues accumulation of materials like thermoset which is a polyurethane foam that does not have the possibility of melting it and re using is a negative condition in the world. The materials of the refrigerators completing their usage period or salvaged during manufacturing are recycled at a large degree. Metal materials and thermoplastic , polymeric materials that can be but into a shape with a technique are separated from the salvage and recycled in the industry. Since the polyurethane foam used as isolation material in refrigerators is thermoset materials are used in the refrigerators as isolating material, they can not be melted and used again. The widely used method disposing polyurethane foam in the industry, is to burn them or bury them into the soil. With both method, the material is not recycled but wasted. Within the scope of the studies directed not to waste the salvaged polyurethane, there is a patent(US5451376,Patent Publication date 19 September 1995) in existence that bases on mixing the salvage polyurethane as a raw material into a new polyurethane. The objective of this invention, is to regain the polyurethane foams that are secured from the used refrigerator material and benefit from the polyurethane foam material, as an input in a composite material production. This invention, bases on the principle of grounding polyurethane pieces under mechanic pressure and heat effect to compress it and to have the polyethylene bonding be bounded in the mixture. To increase the mechanical endurance of the material, with a mixture to be attained with another waste material in form of pieces of card board boxes having thermoplastic base used as beverage boxes, the polyurethane lot is supported. The polyethylene in the mixture, functions as the bond former. The polyurethane foams in the salvaged refrigerator after being disassembled from the body of the refrigeration, it is broken into pieces with the braking machine with rotations blades and it is sieved such that its largest part has the size of 7-8 mm. The rate of mixing the wastes of cardboard beverage boxes having a thermo plastic base is with respect to its weight in form of percentage is 70-75% in paper, 20-25% in polyethylene, 3-5% in aluminum. The mixtures exiting from the breaker machine, sieved through to have the largest particle to be 7/8 mm in length and then mixed to form a lot. The polyurethane waste lot secured is added to a separate lot which is attained with the waste parts of the cardboard beverage boxes having thermoplastics base formed by box material(starting from the outside layer),polyurethane film, card board box. polyethylene film, aluminum film(0.7-0.8 micron) and polyethylene film layers. In a press having mold dimensions at about 1150 mm x 2200 mm, during pressing, it is kept under pressure three times for a period of seven minutes each. During each seven minutes application, pressure is lifted for one minute at the maximum and the water vapor and gases formed in the mold are discharged out. During this pressing operation, 300 tons pressure is applied to the surfaces and the temperature is about 170-180°C. The last pressing which is cold and the final, by using a separate press, it is pressurized for twenty minutes with 170-180 tons of pressure, after this application, composite material is removed off from the mold in form of plate and stocked horizontally.

Claims: CLAIMS 1. The polyurethane foam in the body of the refrigerator salvaged is taken off and put into pieces and the breaking machine having rotating blades, the parts are sieved through, the polyurethane waste lost attained, thermo plastic based card board beverage box wastes and put into piece and collected in form of a separate lot and it is mixed and with the grounded polyurethane pieces compressed under mechanic pressure and with heat effect to have bounding form with the polyethylene bond in the mixture and it is thus characterized. The method aims at using the polyurethane foam material as a production input in a composite material and it is the material that is produced by using this method. 2. In a press, during pressing applied at high temperature, high pressure is applied to the surface and the pressing force is removed for a while to discharge the water vapor and the gases formed out. During the cold and lost pressing, in a separate press, as in Claim 1, for an approximate time and at a high pressure application is made and it is characterized in this way. The polyurethane foam material, with this method is provided for use as a production input in production of a composite material and it is the composite material that is produced by using this method. The waste polyurethane material is put into pieces and then sieved to have an approximate size of 7-8 mm and it is characterized like this. As in claim 1, this is the method and the composite material that is produced by using the method described. 4. The polyurethane waste lot characterized and formed by 30-40%) of the lot with polyurethane waste, as in Claim 1, bases on a method and it is the composite material that is produced with this method. 5. Thermoplastic based cardboard box beverage material, characterized to be formed with layers starting from the outside material of the beverage boxes, the polyethylene film, card board box, polyethylene film, aluminum film (0.7- 0.8 micron) and polyethylene film strata as in Claim 1 uses the method and is the composite material that is produced with this method. 6. Characterized with mold size of the press to be about 1150 mm x 2200 mm and as in Claim 2, this is a method and the composite material that is produced with this method. 7. During the first hot pressing, the temperature is characterized to be around an approximate value interval of 170°C-180°C in this method as described in Claim 2 and this is the composite material that is produced with the method. 8. During hot pressing, high pressure applied three times for periods of seven minutes each to the surfaces, is about 300 tons and it is characterized as is in Claim 1 as a method and it is the composite material that is produced with this method. 9. During the second and last cold pressing, the pressured applied in a separate press, is about 170-180 tons and applied for about twenty minutes and it is characterized as the method in the Claim 2 and the composite material is produced with this method.

Inventors: MAHIROGLU FUAT, TUNCEL SUAT H, MAHIROGLU, FUAT, TUNCEL, SUAT, H.
Applicants: ARCELIK AS, MAHIROGLU FUAT, TUNCEL SUAT H, YEKAS YENIDEN KAZANMA TICARET, ARCELIK A.S., MAHIROGLU, FUAT, TUNCEL, SUAT, H., YEKAS YENIDEN KAZANMA TICARET VE SANAYI A.S.
Application year: 1998
Main classification: B29B17
IPC codes: B29B17