CN102965846A - PET (polyethylene glycol terephthalate) fiber/polyimide fiber composite sound absorbing cotton and preparation method of PET fiber/polyimide fiber composite sound absorbing cotton - Google Patents

Abstract

The invention discloses PET (polyethylene glycol terephthalate) fiber/polyimide fiber composite sound absorbing cotton, which is prepared from the following ingredients in parts by weight: 70 to 80 parts of PET fibers, 40 to 50 parts of polyimide fibers, 10 to 15 parts of emulsifying agents OP-15, 5 to 10 parts of peregal O-10, 80 to 100 parts of PP (propene polymer), 30 to 40 parts of SBS (styrene butadiene styrene block polymer), 15 to 20 parts of nanometer dolomite powder, 10 to 15 parts of modified kieselguhr, 2 to 3 parts of stearic acid, 5 to 8 parts of dibutyl phthalate, 4 to 6 parts of triethyl phosphate, 2 to 3 parts of ethylene bis oleamide, 1 to 2 parts of tetraisopropyl di(dioctylphosphate) titanate, 2 to 3 parts of calcium stearate, 1 to 2 parts of lead sulfate tribasic, 0.5 to 1.5 parts of anti-aging agents MB and 1 to 2 parts of antioxidants 1010. The sound absorbing cotton prepared by the invention has the advantages that the appearance evenness is good, the thickness is uniform, the hand feeling is soft, the product bonding degree is good, the tensile performance is high, the sound absorbing performance is excellent, the flame retardant effect is good, and the like.

Description

A kind of PET fiber/polyimide fiber composite sound-absorbing cotton and preparation method thereof

Technical field

The present invention relates to Nonwovens In Technology, be specifically related to a kind of PET fiber/polyimide fiber composite sound-absorbing cotton and preparation method thereof.

Background technology

Noise is one of three large public hazards of modern society's contaminated environment, and noise directly affects people's healthy progress along with society, and people have proposed more and more higher requirement to the Noise Prevention and Treatment of contaminated environment.Acoustical cotton can be converted to the kinetic energy of the fine count fiber of acoustical cotton inside with the high-frequency noises vibrational energy that produces in the life, and changes into heat energy and disappear, and reaches the function of absorbing sound and lowering noise.Therefore acoustical cotton has good sound-absorbing, heat-insulation warm keeping performance, is widely used in vehicles interior trim fields such as construction material, automobiles.But existing acoustical cotton product with and manufacture method all have many deficiencies, main manifestations is: adopt original manually-operated, use the cutter buttress, productivity ratio is low; Do not carry out flame treatment; The product bond degree not, easily loose, tension intensity is poor etc.

Summary of the invention

The object of the invention provides the PET fiber that a kind of fire resistance is good, intensity is high and sound-absorbing effect is good/polyimide fiber composite sound-absorbing cotton and preparation method thereof for the deficiencies in the prior art.

The technical solution used in the present invention is as follows:

A kind of PET fiber/polyimide fiber composite sound-absorbing is cotton, is made by the raw material of following weight portion: PET fiber 70-80, polyimide fiber 40-50, polyoxyethylene nonylphenol ether-15 10-15, paregal O-10 5-10, PP 80-100, SBS30-40, nano-dolomite powder 15-20, modification infusorial earth 10-15, stearic acid 2-3, dibutyl phthalate 5-8, triethyl phosphate 4-6, the two oleamide 2-3 of ethylene, tetra isopropyl two (dioctyl phosphorous acid acyloxy) titanate esters 1-2, calcium stearate 2-3, lead sulfate tribasic 1-2, antioxidant MB 0.5-1.5, antioxidant 1010 1-2.

Described modification infusorial earth is made by following method: dried diatomite is dropped in the ball mill, the graphite, the vermiculite power of 1-2%, the sepiolite powder of 2-3%, the precipitated calcium carbonate of 3-5%, the waterglass of 2-3% and the polyvinyl alcohol of 3-5% that add 20-30%, behind the ball milling 8-12h, at 1050-1150 ℃ of lower calcining 2-3h, pulverizing grinds to form 200-300 order powder and gets final product.

The preparation method of PET fiber/polyimide fiber composite sound-absorbing cotton may further comprise the steps:

(1) PET fiber and polyimide fiber adding cotton blender machine are mixed, for making fiber softening, reducing the friction between the fiber, prevent static, before later process, add polyoxyethylene nonylphenol ether-15, paregal O-10 uniform stirring with the cloud point shape, balance 20-24h, make fiber level and smooth, have good saturability, be convenient to combing;

(2) the mixed fiber of step (1) is delivered to be carded to the uniform fiber web of thickness in the carding machine, output speed 100-120m/min, output fiber net mass area ratio is 200-300g/m ²

(3) the remaining raw materials such as PP, SBS, nano-dolomite powder, modification infusorial earth, stearic acid, dibutyl phthalate are sent into carried out even blend in the screw extruder, screw rod one district's temperature is controlled at 160-180 ℃, two district's temperature are controlled at 210-225 ℃, three district's temperature are controlled at 220-240 ℃, four district's temperature are controlled at 240-250 ℃, and five district's temperature are controlled at 245-260 ℃;

(4) the above-mentioned fused mass of extruding is dropped into behind fondant filter, measuring pump in the spray silk machine silk is sprayed on the fiber web two sides on the lapper, spray silk die head temperature is controlled at 240-250 ℃, receiving range is controlled at 25-30cm, the jet-stream wind that is heated by air heater when melting and spraying enters spray silk die head dynamic analysis of spinning is carried out slenderizing, the temperature of jet-stream wind is 150-165 ℃, and jet angle is controlled at 55-60 °;

(5) semi-finished product with cold wind cooling, roll extrusion typing cut into various required size specifications after embossing is processed, and namely get the acoustical cotton finished product.

Beneficial effect of the present invention:

The present invention is by carrying out modification to diatomite, make voluminous powder, can improve the sound-absorbing effect of acoustical cotton, the present invention is by adjusting and process modification prescription, added the nano-dolomite powder, acoustical cotton had certain strengthening action, the mechanical performances such as the tensile strength of raising acoustical cotton, shock resistance.The present invention adopts the melt-spraying spinning method, have that technique is simple, controllability good, production efficiency is high, and industrializing implementation is easy, can guarantee the characteristics such as stable and reliable product quality, prepared acoustical cotton has that the smooth appearance degree is good, even thickness, soft, the advantages such as the product bond degree is good, tensile property is strong, sound absorption qualities is good, good flame retardation effect.

The specific embodiment

A kind of PET fiber/polyimide fiber composite sound-absorbing is cotton, is made by the raw material of following weight portion: 75 parts of PET fibers, 40 parts of polyimide fibers, polyoxyethylene nonylphenol ether-15 12 part, paregal O-10 8 part, 86 parts of PP, 32 parts of SBS, 16 parts in nano-dolomite powder, 13 parts of modification infusorial earths, 2.5 parts of stearic acid, 7 parts of dibutyl phthalates, 5 parts of triethyl phosphates, 2.5 parts of the two oleamides of ethylene, 1.5 parts of tetra isopropyl two (dioctyl phosphorous acid acyloxy) titanate esters, 2 parts of calcium stearates, 1 part of lead sulfate tribasic, 0.8 part of antioxidant MB, 1 part of antioxidant 1010.

Wherein, described modification infusorial earth is made by following method: dried diatomite is dropped in the ball mill, add 30% graphite, 2% vermiculite power, 2.5% sepiolite powder, 5% precipitated calcium carbonate, 2.5% waterglass and 4% polyvinyl alcohol, behind the ball milling 10h, at 1050 ℃ of lower calcining 3h, pulverizing grinds to form 200 order powder and gets final product.

The preparation method of PET fiber/polyimide fiber composite sound-absorbing cotton may further comprise the steps:

(1) PET fiber and polyimide fiber adding cotton blender machine are mixed, for making fiber softening, reducing the friction between the fiber, prevent static, before later process, add polyoxyethylene nonylphenol ether-15, paregal O-10 uniform stirring with the cloud point shape, balance 24h, make fiber level and smooth, have good saturability, be convenient to combing;

(2) the mixed fiber of step (1) is delivered to be carded to the uniform fiber web of thickness in the carding machine, output speed 110m/min, output fiber net mass area ratio is 250g/m ²

(3) the remaining raw materials such as PP, SBS, nano-dolomite powder, modification infusorial earth, stearic acid, dibutyl phthalate are sent into carried out even blend in the screw extruder, screw rod one district's temperature is controlled at 170 ℃, two district's temperature are controlled at 215 ℃, three district's temperature are controlled at 230 ℃, four district's temperature are controlled at 245 ℃, and five district's temperature are controlled at 255 ℃;

(4) the above-mentioned fused mass of extruding is dropped into behind fondant filter, measuring pump in the spray silk machine silk is sprayed on the fiber web two sides on the lapper, spray silk die head temperature is controlled at 250 ℃, receiving range is controlled at 30cm, the jet-stream wind that is heated by air heater when melting and spraying enters spray silk die head dynamic analysis of spinning is carried out slenderizing, the temperature of jet-stream wind is 165 ℃, jet velocity is 2500m/min, and jet angle is controlled at 56 °;

(5) semi-finished product with cold wind cooling, roll extrusion typing cut into various required size specifications after embossing is processed, and namely get the acoustical cotton finished product.

After tested, the distribution of fiber diameters of resulting materials is 1.2-1.5 μ m, and tearing strength is 562N/m, and the coefficient of heat conduction is 5.534W/ (m ²℃), oxygen index (OI) is 39%, noise reduction coefficient is 0.85.

Claims (3)

1. PET fiber/polyimide fiber composite sound-absorbing is cotton, it is characterized in that, made by the raw material of following weight portion: PET fiber 70-80, polyimide fiber 40-50, polyoxyethylene nonylphenol ether-15 10-15, paregal O-10 5-10, PP 80-100, SBS 30-40, nano-dolomite powder 15-20, modification infusorial earth 10-15, stearic acid 2-3, dibutyl phthalate 5-8, triethyl phosphate 4-6, the two oleamide 2-3 of ethylene, tetra isopropyl two (dioctyl phosphorous acid acyloxy) titanate esters 1-2, calcium stearate 2-3, lead sulfate tribasic 1-2, antioxidant MB 0.5-1.5, antioxidant 1010 1-2.

2. PET fiber according to claim 1/polyimide fiber composite sound-absorbing is cotton, it is characterized in that, described modification infusorial earth is made by following method: dried diatomite is dropped in the ball mill, the graphite, the vermiculite power of 1-2%, the sepiolite powder of 2-3%, the precipitated calcium carbonate of 3-5%, the waterglass of 2-3% and the polyvinyl alcohol of 3-5% that add 20-30%, behind the ball milling 8-12h, at 1050-1150 ℃ of lower calcining 2-3h, pulverizing grinds to form 200-300 order powder and gets final product.

3. the preparation method of PET fiber as claimed in claim 1/polyimide fiber composite sound-absorbing cotton is characterized in that may further comprise the steps:

(1) PET fiber and polyimide fiber adding cotton blender machine are mixed, for making fiber softening, reducing the friction between the fiber, prevent static, before later process, add polyoxyethylene nonylphenol ether-15, paregal O-10 uniform stirring with the cloud point shape, balance 20-24h, make fiber level and smooth, have good saturability, be convenient to combing;

(2) the mixed fiber of step (1) is delivered to be carded to the uniform fiber web of thickness in the carding machine, output speed 100-120m/min, output fiber net mass area ratio is 200-300g/m ²

(3) the remaining raw materials such as PP, SBS, nano-dolomite powder, modification infusorial earth, stearic acid, dibutyl phthalate are sent into carried out even blend in the screw extruder, screw rod one district's temperature is controlled at 160-180 ℃, two district's temperature are controlled at 210-225 ℃, three district's temperature are controlled at 220-240 ℃, four district's temperature are controlled at 240-250 ℃, and five district's temperature are controlled at 245-260 ℃;

(4) the above-mentioned fused mass of extruding is dropped into behind fondant filter, measuring pump in the spray silk machine silk is sprayed on the fiber web two sides on the lapper, spray silk die head temperature is controlled at 240-250 ℃, receiving range is controlled at 25-30cm, the jet-stream wind that is heated by air heater when melting and spraying enters spray silk die head dynamic analysis of spinning is carried out slenderizing, the temperature of jet-stream wind is 150-165 ℃, and jet angle is controlled at 55-60 °;

(5) semi-finished product with cold wind cooling, roll extrusion typing cut into various required size specifications after embossing is processed, and namely get the acoustical cotton finished product.