KR100832103B1 - The drssing pad polyurethan - Google Patents

Abstract

The present invention is a liquid type coating liquid to be coated on the surface of the solid content 25% by weight-70% by weight (modulus 35-130kg / cm ² ) and solvent 25% by weight-50% by weight (specific gravity 1.0-1.05kg / m ³ ) 20-30 wt% aluminum hydroxide, 25 wt% bromine compound, 30 wt% bromine compound, 10 wt% antimony trioxide, 5 wt% phosphate, 1 wt% flame retardant and antioxidant 5 wt% of the mixture to prepare a 270kg flame retardant compound, and then the one-component urethane liquid solids 25-70% modulus (modulus35-130kg / cm ² ) 700kg toluene or ME, K solvent 360kg mixed to prepare the final raw material Then, the urethane solution finally mixed through the roller to absorb 500g-2kg per 1 m ² uniformly from the foam surface to the inside of the foam air layer according to the thickness of the foam and then evaporate the solvent contained in the urethane liquid through the dryer 1 ~ 5mm inside air layer as surface For one is absorbed by the sound-absorbing urethane solids to form a surface layer poly relates to a process for preparing a polyurethane foam sheet.

Polyurethane, solids

Description

Method for producing sound-absorbing urethane foam sheet {The drssing pad polyurethan}

1 is a cross-sectional view of the sound-absorbing urethane foam sheet of the present invention

Figure 2 is a cross-sectional view of another example of the sound-absorbing urethane foam sheet of the present invention

Figure 3 is an overall view of another example of the sound-absorbing urethane foam sheet of the present invention

Figure 4 is a cross-sectional view of another example of the sound-absorbing urethane foam sheet of the present invention

Figure 5 is an overall view of another example of the sound-absorbing urethane foam sheet of the present invention

<Description of the Drawings>

Foam (1), Absorption Layer (2), Damping Agent (3)

The present invention is prepared by directly coating a breathable urethane liquid to the flame-proof, oil resistance, acid resistance, weather resistance, thermal insulation, heat resistance, surface strength on the polyurethane foam surface and maintain the open cell (urethane cell) that the urethane foam is intact, rather than a transfer method. It relates to a method for producing a sound-absorbing urethane foam sheet.

Conventional sound absorbing material is composed of a urethane foam, poly ethylene foam, lava foam, knife (knife) formed in a uniform shape or on the surface of the film to prevent oil resistance, weather resistance, chemical resistance, heat resistance, flame resistance, It is a state of lamination of cloth, nonwoven fabric, various films, or glass fiber or polyester fiber, rock wool fiber, etc. with vinyl and iron plate or leather.

Looking at the conventional urethane foam products are weak to heat resistance, flame resistance, weather resistance, oil resistance, acid resistance, water resistance and temperature changes, and after a certain period of time causes a material deformation or degradation of quality due to the phenomenon caused by weathering scattering. Because of this problem, a cloth, a film Al sheet, a nonwoven fabric, etc. are laminated on the polyurethane foam surface.

When the non-ventilated material is laminated on the urethane surface, the excellent noise source (continuous bubble structure) inherent in urethane foam cannot be used. In addition, the use of the urethane foam itself, which has good sound absorption performance, made it difficult to change the material properties for use in automobile bonnets, construction machinery engine rooms, bus engine rooms, and air compressor cases, which are highly contaminated with heat changes, gas, dust, and oil. .

To compensate for this, a sound-absorbing urethane foam sheet has been developed by providing a breathable urethane film on the surface of the polyurethane foam and transferring it to the surface of the foam. (Domestic Patent Application No. 91-4040)

The breathable urethane film transferred onto the polyurethane surface has excellent weather resistance, chemical resistance and oil resistance. Polyurethane film layer is formed of a plurality of fine breathable pores, the polyurethane foam sound absorbing agent laminated with the breathable film is a polyurethane foam sheet excellent sound absorption performance than conventional products.

However, the product which transfers the film having many fine breathability on the surface of polyurethane foam also cannot maintain the original noise source (continuous bubble structure) of polyurethane foam as well as the air layer (airflow) which is a bubble structure which is a part of noise source in the process of lamination. At the same time, the sound source was not absorbed by the breathable urethane film transferred onto the polyurethane surface and partially reflected, so that the sound absorbing performance was lowered.

In addition, in order to form a breathable film, the film is manufactured by mixing a pigment in a urethane liquid, so that flame resistance and heat resistance are required, and gas, dust, oil and heat change are frequently caused in automobiles, construction machinery, bus engine air compressors and generators. It was not suitable for use in the interior.

Also, in order to manufacture a breathable film, roll coating urethane liquid on a release paper as a first step, a second step through which a dryer is passed, and a second step of a film having fine breathable pores dried in a gel state on a release paper It has a task of going through a three-step process made through three steps of passing the compression roller portion on the urethane foam surface and four steps of removing the release paper through the take-up roller to remove the release paper attached to the urethane foam.

The present invention is a domestic patent application No.1991-4040 (Notification No. 1994-4805) of the present application filed in order to solve the problems as described above: Name of the invention: The present invention is an improvement of the urethane foam sheet for sound absorption Inorganic flame retardant, heat-resistant and other admixtures, which are appropriate to the liquid, are mixed to form a first stage, and the urethane foam is passed through a roller, which is a two-stage roller, to become a complete product stage. The present invention is to provide a method for producing a urethane foam sheet having a revolutionary completely sound-absorbing performance that can not only be 100% perfect use, but also solve the effects of heat resistance, flame retardancy and oil resistance, gas resistance at the same time It is a technical task.

In order to achieve the above object, the present invention is composed of a foam (1), and the upper surface of the blowing agent is composed of an absorber layer (2) formed by a roller, the lower surface of the blowing agent is composed of a damper (3) It is a method for producing a urethane foam sheet.

The present invention is a liquid type coating material to absorb the surface of the urethane solids 25% by weight-70% by weight (MODULUS 35-100 kg / cm ² ) and solvent 25% by weight-50% by weight (specific gravity 1.0-1.05 ) the one-part aluminum hydroxide 20% to 30% by weight of the polyurethane raw material, 25 to 30% by weight bromine compound, antimony trioxide, 10 wt.%, acid ester 5% by weight, an antioxidant (phenol to know, Fuck ether, direction amine) containing a And 270 kg of a flame retardant compound was prepared by mixing 1% -5% by weight of an adjuvant (benzotriazole type, benzophenol type, sulfinate ester, hindered amine) to one-component urethane solids 25-70% modulus (modulus35). -100kg / cm ² ) 700kg toluene or 360kg of MEK solvent is uniformly mixed in flame retardant compound 1: urethane raw material 2.5-3: solvent 1.5-2 ratio to prepare final raw material. Final mixing the polyurethane solution through a roller in accordance with the foam thickness was 1m ² per 500g-2kg to uniformly polyurethane foam forms an air layer inside the absorption from the surface and then, by evaporation of the solvent remaining in the polyurethane liquid inside through the dryer air from the polyurethane surface The present invention relates to a method for producing a sound-absorbing urethane foam sheet in which solids are absorbed up to 1-5 mm to form a surface layer.

In the present invention, both the roll work or the sheet work can be performed, and if the thickness is uniformly adjusted and absorbed at 500g-2kg per 1m ^{2 of} foam, up to 1mm-5mm bubble structure is absorbed from the urethane surface and is not in the film state. % The surface layer which can be vented is formed. If absorbed more than 2kg per 1m ² film layer is formed, so that the thickness of the constant surface from the foam structure of the foam should be considered in consideration of the technical aspect to provide a 100% sound absorption performance.

This prevents film formation by properly mixing inorganic flame retardants, auxiliary materials and solvents with urethane raw materials, and removes solvents contained in raw materials by absorbing the inside of the air layer from the urethane surface. The absorbent urethane sheet for absorbing up to 1mm-5mm inside the air layer having a bubble structure from the surface to form a surface layer is prepared.

Hereinafter, an embodiment of the present invention will be described in detail.

Example 1

To 3.5 kg of one-component urethane liquid raw material containing 25 to 70% solids (MODULUS) 35 to 100 (kg / ㎠) and 25 to 50% solvent (1.0 to 1.05 specific gravity),

1.4 kg aluminum hydroxide, 1.75 kg bromine compound, 0.7 kg antimony trioxide. After adding 0.35 kg of phosphate and 0.07 kg of flame retardant auxiliary and antioxidant, to prepare a flame retardant mixture, 2.7 kg of flame retardant mixture was uniformly mixed with 7 kg of urethane solution raw material and 3.6 kg of solvent to prepare a final raw material.

Absorbs 500g ~ 2kg per 1㎡ evenly from the urethane surface to the inside of the air layer according to the foam thickness through the roller, and then volatilizes the solvent remaining inside the urethane liquid through the dryer to absorb the solids up to 1 ~ 5mm inside the air layer through the urethane surface. The surface layer was formed to prepare a sound absorbing urethane sheet.

Example 2

To 3.5 kg of one-component urethane liquid raw material containing 25 to 70% solids (MODULUS) 35 to 100 (kg / ㎠) and 25 to 50% solvent (1.0 to 1.05 specific gravity),

2.1 kg aluminum hydroxide, 2.1 kg bromine compound, 0.7 kg antimony trioxide. After adding 0.35 kg of phosphate and 0.35 kg of flame retardant auxiliary and antioxidant, to prepare a flame retardant mixture, 2.7 kg of flame retardant mixture was uniformly mixed with 7 kg of urethane liquid raw material and 3.6 kg of solvent to make a primary raw material. According to the foam thickness through 500g ~ 2kg per 1㎡ uniformly absorbed from the urethane surface to the inside of the air layer and then volatilized the solvent remaining inside the urethane liquid through the dryer to absorb the solid content up to 1 ~ 5mm inside the air layer to the urethane surface The surface layer was formed to prepare the sound absorbing urethane sheet.

Experimental Example 1

The test results of the physical properties issued by the Korea Living Environment Testing Institute dated Sept. 15, 2006.

Table 1 Test Results Table

Test Items unit Test result Test Methods Apparent density g / cm 3 0.045 KS M ISO 7214: 2006 The tensile strength N / ㎠ 27.0 Elongation % 95 Tear strength N / cm 10.7 KS M 6518: 2001 Compression Hardness (50% Compression) N / ㎠ 2.5 KS M ISO 7214: 2006 Heating dimension change rate: 130 ℃ × 2h % -0.33 KS M 3802: 2001 Heat resistance (100 ℃, 8h) - No cracks and deformation KS M 3015: 2003 Low temperature resistance (-30 ℃, 8h) - No cracks and deformation Oil resistance (room temperature, 24h deposition) Hydraulic oil - No cracks and deformation Engine oil No cracks and deformation Flame resistance: after A method, 70 ℃ × 168h - Self-extinguishing Ozone resistance: 50pphm, 40 ℃, 72h, 20% elongation - No cracks or abnormalities KS M 6518: 2001 Initial adhesive strength N / 2.5 cm {N / 10 mm} 18.5 {7.4} KS A 1107: 2004 Adhesion strength after heat aging (100 ℃, 8h) N / 2.5 cm {N / 10 mm} 14.3 {5.7}

Experimental Example 2

Requested by Korea Living Environment Testing Institute dated Sept. 15, 2006 No. ICT06-27527 with sample name Polyurethane foam and the test results of sound absorption rate measurement data for each frequency issued on Sept. 27, 2006 are as follows.

Product Name: Polyurethane Foam (Model MP-4E-DG-FM 40t)

44.67mm thickness (100φ)

Specimen Size: 100φ

Weight: 16.4g (100φ standard)

Table 2 Absorption Rate Measurement

1/3 Octave Band Center Frequency [Hz] Freq. (Hz) 80 100 125 160 200 250 315 Sound absorption 0.05 0.06 0.08 0.1 0.15 0.21 0.27 Freq. (Hz) 400 500 630 800 1000 1250 1600 Sound absorption 0.36 0.46 0.59 0.77 0.91 0.99 0.97

Hereinafter, description will be given with reference to the drawings.

1 is a cross-sectional view of the sound-absorbing urethane foam sheet of the present invention, Figure 2 is a cross-sectional view of another example of the sound-absorbing urethane foam sheet of the present invention, Figure 3 is an overall view of another example of the sound-absorbing urethane foam sheet of the present invention, Figure 4 is a view of the present invention Sectional drawing of another example of a sound-absorbing urethane foam sheet, FIG. 5 shows the overall view of another example of the sound-absorbing urethane foam sheet of the present invention, showing a foam (1), an absorbing layer (2), a vibration damper (3).

Looking at the structure of the present invention manufactured as in the embodiment, as shown in Figure 1, the foam (1), and the upper portion of the foam (1) as the absorbent layer (2) absorbed by the urethane liquid 1mm-5mm Composed,

Referring to Figure 2, it has a structure as shown in Figure 1, and is a sound-absorbing urethane foam sheet, characterized in that the foam and the absorber layer is molded in a negative pattern or shape with a mold,

Referring to FIG. 3, the urethane foam sheet for sound absorption is characterized by having a structure formed in a mold and a structure as shown in FIG. 2, and having a pattern shape and an absorption layer 2 formed on the pattern shape.

Looking at another example of the sound-absorbing urethane foam sheet, as shown in Figures 4 to 5,

The foam 1 and the upper part of the foam 1 are composed of an absorbent layer 2 in which urethane liquid is absorbed by 1 mm-5 mm, and the lower part of the foam is composed of a vibration damper 3 added by adhesive or heat sealing. It is,

5 is a manufacturing method of the sound-absorbing urethane foam sheet, which is characterized by forming a pattern unlike FIG. 4 and forming an absorbing layer 2 on the pattern.

The present invention as described above is an economical sound-absorbing foam product for forming a high-performance sound-absorbing product in a single process of sound absorption, oil resistance, heat resistance, acid resistance, weather resistance, chemical resistance, heat insulation performance.

Claims (4)

A method for producing a polyurethane foam or continuous foamed foam product having a polyurethane absorbent layer formed thereon. To 3.5 kg of one-component urethane liquid raw material containing 25 to 70% by weight of modulus (MODULUS) 35 to 100 (kg / ㎠) and 25 to 50% by weight of solvent (1.0 to 1.05 in specific gravity), Aluminum hydroxide 1.4 ~ 2.1kg, Bromine compound 1.75kg ~ 2.1kg , Antimony trioxide 0.7kg. After adding 0.35kg of phosphate and 0.07 ~ 0.35kg of flame retardant and antioxidant, to prepare a flame retardant mixture, 2.7kg of flame retardant mixture was uniformly mixed with 7kg of urethane solution raw material and 3.6kg of solvent to prepare final raw material. After absorbing 500g ~ 2kg per 1㎡ evenly from the urethane surface to the inside of the air layer through the roller, volatilize the remaining solvent inside the urethane liquid through the dryer A method for producing a sound-absorbing polyurethane foam sheet characterized by absorbing and forming a surface layer. In the sound-absorbing urethane foam sheet, Sound absorbing urethane foam sheet, characterized in that the foam (1), and the upper portion of the foam (1) is composed of an absorbent layer (2) absorbed urethane liquid 1mm-5mm. delete In the sound-absorbing urethane foam sheet, The foam 1 and the upper part of the foam 1 are composed of an absorbent layer 2 in which a urethane liquid is absorbed by 1 mm-5 mm, and the lower part of the foaming agent is composed of a vibration damper 3 added by adhesive or heat sealing. Sound-absorbing urethane foam sheet.

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