CN102965841A - PET (polyethylene glycol terephthalate) fiber/mulberry bark composite sound absorbing cotton and preparation method of PET fiber/mulberry bark composite sound absorbing cotton - Google Patents

Abstract

The invention discloses PET (polyethylene glycol terephthalate) fiber/mulberry bark composite sound absorbing cotton, which comprises the following ingredients in parts by weight: 70 to 80 parts of PET fibers, 40 to 50 parts of mulberry bark fibers, 10 to 15 parts of emulsifying agents OP-9, 5 to 10 parts of peregal O-25, 80 to 100 parts of PP (propene polymer), 30 to 40 parts of EVA (ethylene vinyl acetate), 15 to 20 parts of nanometer barite powder, 10 to 15 parts of modified kieselguhr, 2 to 3 parts of stearic acid, 5 to 8 parts of dioctyl phthalate, 4 to 6 parts of decabromodiphenyl ether, 2 to 3 parts of tristearin, 1 to 2 parts of vinyltriethoxysilane, 2 to 3 parts of calcium stearate, 1 to 2 parts of dibasic lead phosphate, 0.5 to 1.5 parts of anti-ageing agents OD (octyl decyl) and 1 to 2 parts of antioxidants DLTP (dilauryl thiodipropionate). 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/mulberry fibre 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/mulberry fibre 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/mulberry fibre 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/mulberry fibre composite sound-absorbing is cotton, is made by the raw material of following weight portion: PET fiber 70-80, mulberry fibre 40-50, polyoxyethylene nonylphenol ether-9 10-15, peregal O-25 5-10, PP 80-100, EVA30-40, nano barite powder 15-20, modification infusorial earth 10-15, stearic acid 2-3, dioctyl phthalate 5-8, deca-BDE 4-6, glyceryl tristearate 2-3, vinyltriethoxysilane 1-2, calcium stearate 2-3, dibasic lead phosphite 1-2, age resistor OD 0.5-1.5, anti-oxidant DLTP 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/mulberry fibre composite sound-absorbing cotton may further comprise the steps:

(1) PET fiber and mulberry fibre 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-9, peregal O-25 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, EVA, nano barite powder, modification infusorial earth, stearic acid, dioctyl 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 barite 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/mulberry fibre composite sound-absorbing is cotton, is made by the raw material of following weight portion: 76 parts of PET fibers, 44 parts of mulberry fibres, polyoxyethylene nonylphenol ether-9 12 part, 8 parts of peregal O-25s, 35 parts of 90 parts of PP, EVA, 16 parts in nano barite powder, 10 parts of modification infusorial earths, 2.5 parts of stearic acid, 6 parts of dioctyl phthalates, 5 parts of deca-BDEs, 2 parts of glyceryl tristearates, 1.5 parts of vinyltriethoxysilane, 2 parts of calcium stearates, 1.5 parts of dibasic lead phosphites, 1 part of age resistor OD, 1.5 parts of anti-oxidant DLTPs.

Wherein, described modification infusorial earth is made by following method: dried diatomite is dropped in the ball mill, add 22% graphite, 1.5% vermiculite power, 3% sepiolite powder, 4% precipitated calcium carbonate, 2.5% waterglass and 4% polyvinyl alcohol, behind the ball milling 10h, at 1120 ℃ of lower calcining 2h, pulverizing grinds to form 200 order powder and gets final product.

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

(1) PET fiber and mulberry fibre 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-9, peregal O-25 uniform stirring with the cloud point shape, balance 22h, 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 120m/min, output fiber net mass area ratio is 250g/m ²

(3) the remaining raw materials such as PP, EVA, nano barite powder, modification infusorial earth, stearic acid, dioctyl phthalate are sent into carried out even blend in the screw extruder, screw rod one district's temperature is controlled at 172 ℃, two district's temperature are controlled at 218 ℃, three district's temperature are controlled at 235 ℃, four district's temperature are controlled at 245 ℃, and five district's temperature are controlled at 250 ℃;

(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 245 ℃, receiving range is controlled at 28cm, 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 155 ℃, jet velocity is 3000m/min, and jet angle is controlled at 55 °;

(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 1.6-1.8 μ m, and tearing strength is 541N/m, and the coefficient of heat conduction is 5.496W/ (m ²℃), oxygen index (OI) is 40%, noise reduction coefficient is 0.82.

Claims (3)

1. PET fiber/mulberry fibre composite sound-absorbing is cotton, it is characterized in that, made by the raw material of following weight portion: PET fiber 70-80, mulberry fibre 40-50, polyoxyethylene nonylphenol ether-9 10-15, peregal O-25 5-10, PP 80-100, EVA 30-40, nano barite powder 15-20, modification infusorial earth 10-15, stearic acid 2-3, dioctyl phthalate 5-8, deca-BDE 4-6, glyceryl tristearate 2-3, vinyltriethoxysilane 1-2, calcium stearate 2-3, dibasic lead phosphite 1-2, age resistor OD 0.5-1.5, anti-oxidant DLTP 1-2.

2. PET fiber according to claim 1/mulberry fibre 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/mulberry fibre composite sound-absorbing cotton is characterized in that may further comprise the steps:

(1) PET fiber and mulberry fibre 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-9, peregal O-25 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, EVA, nano barite powder, modification infusorial earth, stearic acid, dioctyl 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.