KR100536010B1 - Method for manufacturing foam insulation, sound insulation and shielding sheet synthesized with waste urethane by liquefying waste tire - Google Patents

Abstract

The present invention relates to a method for producing a foamed hard rubber urethane sheet synthesized with waste urethane by liquefying waste tire with a solvent.

It is economical by producing a foam sheet that can be used for multi-purpose and multi-functional, single product that blocks heat conduction by climate or temperature change, blocks the floor impact sound between building structures, and shields radiant heat by solar energy. It is aimed at environmentally advantageous.

Description

Method for producing foam insulation, sound insulation and shielding sheet synthesized with waste urethane by liquefying waste tires

The present invention relates to a method for producing foamed thermal insulation, sound insulation, shielding sheet synthesized with waste urethane by liquefying waste tire rubber, and more specifically, commonly used insulation, sound insulation, and shielding agent have It has been used for one purpose only because of its physical properties.

However, the present invention is intended to be economically very advantageous as it is used in places or elements that are multifunctional and versatile as kanji products.

Conventionally, foamed polystyrene, urethane foam, glass fiber, etc. are widely used as an insulation for building structures, civil structures, or general structures, and foamed E.V.A (Ethytene Vinyl Acetat) products are mainly used as A.P.T interlayer floor insulation. In addition, as for the radiation heat shielding agent, many products such as polyethylene woven fabric products.

In the past, APT used only 20mm of foam polystyrene thermal insulation material as an interlayer insulation, but recently, it has been recognized that it needs to install sound insulation of APT's interlayer floor impact sound. The economic burden was further added by the regulation.

In general, structures that require insulation and shielding against radiant heat are used together with insulation and shielding, which brings economic burden and troublesome installation.

Therefore, the present invention is used in a place where multi-purpose, multi-functionality is required as a single product, as well as strengthening water resistance and durability, increasing elasticity and resilience, and increasing tensile strength and bending performance. It is characterized by manufacturing a test.

And by using waste tires and waste urethanes, it aims to contribute to society in terms of economy and environment.

Accordingly, the present invention is to solve the conventional problems as described above by liquefying the waste tire rubber into a solvent to increase the elasticity and resilience, sound insulation performance and synthesis of waste urethane to increase the low temperature flexibility and strength, one product regardless of climate temperature change It aims to make safety of insulation, sound insulation and shielding function and contribute to economical and environmentally friendly aspects with ease of quality control and construction convenience.

The present invention for achieving the above object

1. Cut waste tire rubber into palm size and wash and dry at 60 ℃ for 24 hours.

2. Waste TDI (Toluen Di Isocyanate) on dried waste tire rubber )) Is mixed at a weight ratio of 70% / 30% = (cut waste tire 70% / TDI 30%) and left to liquefy for 24 hours to obtain a gel rubber solution, and the obtained liquefied rubber is stirred for 60 minutes (rotation speed 20rpm) Remove impurities (iron cores, vinyls, carbon black, etc.).

3. Waste MDI (Methylene Di Isocyanate. (OCN- -CH _2- -NCO)) is mixed and stirred at a weight distribution of 40% / 60%.

(Rotation speed 20rpm)

4. Waste polyol (HO to () in the mixed solution (rubber, TDI, MDI) ) N ~ OH) is mixed and injected into a pre-fabricated mold (width 1m, length 2m, height 1m, temperature 40 ℃) at a weight distribution ratio of 40% / 60% based on MDI content ratio. Create a form.

5. The rubber urethane foam obtained in 4) was cut into 20 mm thick, 1 m wide and 2 m long using a hot wire to prepare a rubber urethane sheet having excellent foam insulation, sound insulation, and shielding.

end. In 1), when the rubber tire cut size is larger than the palm size, the dissolution time by the solvent increases in proportion to the size, and the smaller the cut size, the shorter the dissolution time by the solvent but the economical burden due to the increased cutting process. Since the cut size is the palm size was preferred.

I. In addition, the mixture of the properties of 2) to 1) and the properties of 2) at 70% / 30% ratio is more soluble and more agitated as the properties of 2) increase, but the physical performance gradually decreases as the rubber content decreases. As the physical properties of 2) decreased, the physical properties of 1) did not dissolve well and stir well, so the mixing ratio was 70% / 30%.

All. In addition, the mixing ratio of 3) to 2) and 3) is 40% / 60%. As the physical properties of 2) increase, the physical performance improves, but the ear canal is weak, resulting in poor insulation, shielding, and sound insulation.

On the contrary, as the physical property of 3) increases, the effect of heat insulation, sound insulation, and shielding is satisfactory, but the physical performance is deteriorated. It was.

Since the main product is a synthetic product of waste tires containing waste tire rubber and NCO (isocyanate) group, it applies elasticity, resilience, flexibility and sound insulation which are the strengths of rubber, and applies flexural strength, compressive strength, vesicle performance and durability which are advantages of urethane. The superiority of the product is superior to other companies' products, and it is considered to be an invention that is competitive and environmentally contributing to society by using waste tire and waste urethane as raw materials.

※ Example at lab

① Outline of experiment

The present invention is to maximize the application of the physical properties of rubber, elasticity, resilience, elongation, and the like in order to largely compensate for the long and shortcomings in the manufacturing method for agglomeration of the waste tire rubber powder used in the polymer resin properties into a sheet-forming method to

This product was synthesized from waste tires by liquefaction with waste urethane. The experiments were conducted on the morphological, thermal and mechanical physicochemical properties and the reinforcement of physical properties.

② Composition of Sample

The composition of each sample is shown in Table (1).

In this table, 80/20 means weight ratio of 80% of waste rubber (TR) versus 20% of waste Toluen Di Isocyanate (T.D.I).

②-70 / ③-30 means the weight distribution ratio of the waste polyol of ③ to the waste M.D.I (Methylen Di Isocyanate) content contained in the mixed solution (rubber, T.D.I, M.D.I) in the composition and function of the invention.

③ Fabrication of Specimen Sheet

Foamed sheets were prepared for each physical composition and their methods are shown in Table (II).

First, before mixing the material, wash the waste rubber TR (Tire Rubber) cut to the size of palm and dry it in the oven at 60 ℃ for 24 hours, and then put the waste TR and waste TDI into the mixer for each composition and leave it for 24 hours to liquefy. The rubber was stirred for 60 minutes to separate and remove impurities (iron core, vinyl, carbon black).

At this time, the rotation speed is 20rpm and was made at room temperature.

Thus, liquefied rubbers were synthesized according to the ratio of waste MDI content, and then, rigid urethane foam specimen sheets were prepared by pouring and stirring reactions in a mold at 40 ° C having a thickness of 20 mm and a width of 10 cm x 30 cm. .

④ Review of results

In the blending ratio of T.R (Tire Rubber) and T.D.I (Toluen Di Isocyanate), it can be seen that the thermal conductivity and strength decrease with increasing T.R content.

At 70% T.R, the synthesis of cross-links is good, but at 80% it is further reduced.

In addition, it can be seen that the strength decreases and the thermal conductivity increases as the mixing ratio of polyol increases according to the M.D.I content ratio in the mixed solution.

(KSM 3809: Performance test results based on 2002 rigid urethane foam insulation)

※ The measurement of thermal conductivity was conducted according to the method specified in KS L 9016.

Tests conducted in accordance with KS M 3809: 2002 standard show that the higher the TR content, the lower the strength, and the lower the strength even when the polyl ratio is increased.

In addition, the physical properties were well compared with the standard reference value.

Tests conducted in accordance with KS M 3809: 2002 standard show that the higher the TR content, the lower the strength, and the lower the strength even when the polyl ratio is increased.

In addition, the physical properties were well compared with the standard reference value.

⑤ In order to measure the floor impact sound level, the size of the specimen is 20mm thick, 3m wide, and 4m long foamed sound insulation sheet. The sound insulation performance of the fault sound through noise reduction, which is the average sound pressure level of the sound source room and the sound receiving room (KS F 2810-2: 2001), was calculated by the following equation.

Where Lfmax. k: Energy measurement value of the maximum sound pressure level measured at the measuring point

                m: number of measuring points

        Lfamx. i: Maximum sound pressure level measurement (dB) at the i measuring point

In the above experiment, the impact sound value was 39 dB, and this value can be seen that the sound insulation performance is very high compared to the average heavy impact sound pressure of 50 dB.

(1) Floor impact sound level measurement in sound receiving room

㉠ Measurement position setting and impact sound level measurement

Grab five measuring points distributed over 50cm from the wall around the sound collecting room, and place the microphones evenly in the 50cm ~ 70cm height above the floor, checking the highest frequency more than 3 times and checking the total frequency of all frequencies. Sound pressure level (dB) was examined.

평가 Evaluation method of impact sound and comparison of measurement result

㉢ Test result

(2) Application Level for Floor Impact Sound Level

Claims (3)

In the process of manufacturing rubber urethane foam sheet synthesized with urethane by liquefying tire rubber After cutting and washing the rubber tire into the size of about 10cm to 15cm, and liquefied to 30 parts by weight of petrolene diisocyanate (T.D.I) to 70 parts by weight of dried tire rubber Stirring mixed methylene diisocyanate to 40% / 60% by weight of the liquefied rubber A method for producing a rigid rubber urethane foam sheet by mixing and spraying in a constant molder at a weight distribution ratio of 40% / 60% of polyol to the MDI content ratio of the obtained rubber, TDI, MDI, and mixed solution. Method of producing a rigid rubber urethane foam sheet, characterized in that the rubber used in the mixing with the urethane in claim 1 comprises all forms including powder The method of manufacturing a rigid rubber urethane foam sheet, characterized in that the fer TDI, pe MDI, pe Polyol in the first paragraph comprises a genuine TDI, genuine MDI, genuine Polyol