CN102517922B - Method for producing automotive interior leather made of high-flame retardance superfine polyamide fiber - Google Patents
Method for producing automotive interior leather made of high-flame retardance superfine polyamide fiber Download PDFInfo
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- CN102517922B CN102517922B CN 201110398053 CN201110398053A CN102517922B CN 102517922 B CN102517922 B CN 102517922B CN 201110398053 CN201110398053 CN 201110398053 CN 201110398053 A CN201110398053 A CN 201110398053A CN 102517922 B CN102517922 B CN 102517922B
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Abstract
The invention relates to a method for producing automotive interior leather made of a high-flame retardance superfine polyamide fiber, which comprises the following technical steps of: (1) preparing a superfine sea-island fiber; (2) manufacturing a non-woven fabric; (3) impregnating the non-woven fabric through a wet process; (4) reducing the weight through toluene; (5) leading the polyamide leather substrate treated in the step (4) to pass through an oil groove containing flame-retardant treatment liquid, and drying the polyamide leather substrate; (6) successively applying a surface-layer coating, a middle-layer coating and a bonding-layer coating on release paper from bottom to top, drying the surface-layer coating at 80-130 DEG C for 15-20 s to obtain a surface layer, drying the surface-layer coating at 80-130 DEG C for 25-45 s to obtain a middle layer, and drying the bonding-layer coating at 60-100 DEG C for 25-35 s to obtain a bonding layer; and (7) aligning and superposing the release paper and the polyamide leather substrate, drying the release paper and the polyamide leather substrate, releasing the release paper from the polyamide leather substrate, and drying the polyamide leather substrate at the temperature of 120-150 DEG C and the automotive speed of 4-8 m/min to obtain the automotive interior leather. With the method, the cost is saved, the efficiency is improved, 50 times of water washing at 60 DEC C is resisted, and more than 90% fire retardant is still reserved.
Description
Technical field
The present invention relates to a kind of production method of automotive trim leather, especially a kind of production method of superfine denier polyamide fiber system automotive trim leather of high flame retardant.
Background technology
Fast development along with superfine fibre, superfine fibre being used in the process hides more and more widely, and in the technology of nonwoven fabric superfine fibre process hides, selected raw material polyamide 6 (PA6), low density polyethylene (LDPE) (PE), wet type impregnation polyurethane and dry method veneer all are inflammable chemical products with polyurethane, in order to improve its flame retardant effect, the base of superfine denier polyamide leather handle and the technology of dry method veneer in the fire-retardant operation of increase, solve this difficult problem.
Summary of the invention
The objective of the invention is to overcome the deficiencies in the prior art, a kind of production method of superfine denier polyamide fiber system automotive trim leather of high flame retardant is provided, improved the flame retardant effect of automotive trim leather, safer environmental protection.
According to technical scheme provided by the invention, the production method of the superfine denier polyamide fiber system automotive trim of described high flame retardant leather, feature is to comprise following processing step:
(1) preparation super fine denier islands-in-sea type fibre: polyamide 6 is as island component, low density polyethylene (LDPE) is as extra large component, is 40:60 ~ 60:40 mixing and stirring with polyamide 6 and low density polyethylene (LDPE) according to mass ratio, and mixing speed is 30 ~ 50 rev/mins, and mixing time is 15 ~ 20 minutes; Enter the fabric of island-in-sea type spinning pack by single extruder type spinning machine fusion stirring, extrude the formation tow through distribution plate and spinnerets, the temperature of single extruder type spinning machine is 90 ~ 295 ℃; The tow that obtains carries out drawing-off through three road drawing roller again, and the draw ratio of three road drawing roller is 1:2.2 ~ 2.8:3.5 ~ 4; Spinning oil in oil bath; After crimping machine curls, 50 ~ 75 ℃ of oven dry 5 ~ 10 minutes; It is that 50 ~ 55mm, fiber number are the staple fibre of 5.0 ~ 7.0dtex that cut-out makes length;
(2) make nonwoven fabric: the staple fibre that step (1) is obtained carries out thick shredding on thick opener, by blower fan the staple fibre of thick shredding is delivered to big bin mixing then, carry out smart shredding through five roller refined openers again, again through extreme trace hopper, air pressure face case feeding fiber, after the electronic scale weighing, after carrying out combing by carding machine, on the lapping machine, carry out lapping; On needing machine, puncture at last, obtain nonwoven fabric; The nonwoven fabric that obtains is neat with the nonwoven fabric cutting through bead cutter, carries out thermal contraction fixation, and temperature is 80 ~ 140 ℃, and the nonwoven fabric speed of a motor vehicle is 5 ~ 10m/min, and the gap of shaping roller tube is: nonwoven fabric cloth thickness/1.1 ~ 1.5;
(3) wet method impregnation: the nonwoven fabric that step (2) is obtained is through containing immersion liquid, pushes impregnation repeatedly through roller repeatedly, will contain immersion liquid evenly extruding infiltrate through in the nonwoven fabric, the coating weight that contains immersion liquid on the nonwoven fabric is 1.2 ~ 3.0 times of nonwoven fabric grammes per square metre; Again with scraper with nonwoven fabric double-edged contain immersion liquid scrape clean after, solidify foaming by the aqueous solution that contains dimethyl formamide, setting time is 40 ~ 60 minutes, and setting temperature is 25 ~ 45 ℃, and the mass percentage concentration of the aqueous solution of dimethyl formamide is 18 ~ 25%; Then nonwoven fabric is washed by rinsing bowl, dimethyl formamide residual on the nonwoven fabric is washed off, obtain porous matter elastomeric polyethers type polyurethane nonwoven fabric wet method base;
(4) toluene decrement: the porous matter elastomeric polyethers type polyurethane nonwoven fabric wet method base that step (3) is obtained passes through 6 ~ 8 toluene grooves, and the temperature of toluene groove is 80 ~ 95 ℃; Pass through the residual toluene of rinsing bowl flush away again, the water temperature of rinsing bowl is 95 ~ 100 ℃, obtains polyamide leather base; The speed of a motor vehicle of described porous matter elastomeric polyethers type polyurethane nonwoven fabric wet method base is 3 ~ 8m/min;
(5) flame treatment: step (4) is handled the polyamide leather base obtain by containing the oil groove of fire-retardant treatment liquid, push through squeezer roll again, pick-up rate is 70 ~ 90%, and again 130 ~ 160 ℃ oven for drying, the speed of a motor vehicle of described polyamide leather base is 3 ~ 8 meters/minute;
(6) dry method veneer: successively be coated in release liners on by order from the bottom up investment precoat, middle coating intermediate, tack coat coating, described investment precoat makes surface layer at 80 ~ 130 ℃ of oven dry 15 ~ 20s, described middle coating intermediate makes the middle level at 80 ~ 130 ℃ of oven dry 25 ~ 45s, and described tack coat coating makes tack coat at 60 ~ 100 ℃ of oven dry 25 ~ 35s;
(7) the polyamide leather base alignment and congruence that obtains of release liners that step (6) is obtained and step (5), after the drying, release liners and polyamide leather base are peeled off, bake out temperature is 120 ~ 150 ℃ again, the speed of a motor vehicle is 4 ~ 8m/min, obtains described automotive trim leather.
Described fire-retardant treatment liquid comprises following component, and the component ratio is counted by weight: water: 70 ~ 90 parts, and fire retardant: 5 ~ 20 parts, alkali: 5 ~ 10 parts, bleeding agent: 0.03 ~ 0.18 part, levelling agent: 0.02 ~ 0.05 part; The pH value of described fire-retardant treatment liquid is 5 ~ 7; Described alkali is that mass percentage concentration is 20% ~ 35% Na
2HPO
4, Na
2CO
3, NaHCO
3Or mass percentage concentration is 20 ~ 35% ammoniacal liquor.
In the step (3), describedly contain immersion liquid and comprise following component, the component ratio is counted by weight: 100 parts of EU, 20 ~ 50 parts of dimethyl formamides, 0.5 ~ 3 part of emulsifying agent, 0.1 ~ 0.5 part of levelling agent, 1 ~ 3 part of bleeding agent, 0.5 ~ 3 part of abscess conditioning agent; The elastic modelling quantity that described EU contains immersion liquid is 70 ~ 100 kg/cm
2, the described solid content that contains immersion liquid is 18 ~ 25%.
In the step (6), described investment precoat and middle coating intermediate comprise following component, the component ratio is counted by weight: polyurethane resin is 100 parts, N, dinethylformamide is: 10 ~ 20 parts, toluene is: 50 ~ 60 parts, fire retardant is: 5 ~ 10 parts, additive is: 5 ~ 15 parts, thickener is: 1 ~ 5 part; The solid content of described polyurethane resin is 28 ~ 32%, and the modulus during described polyurethane resin 100% percentage elongation is 40 ~ 60kg/cm
2Described additive is 2,2, 4-dinitrophenol.
In the step (6), described adhesive linkage coating is a fluid polyurethane resin; The solid content of a described fluid polyurethane resin is 30 ~ 50%, and the modulus during a described fluid polyurethane resin 100% percentage elongation is 20 ~ 45kg/cm
2
In the step (6), the viscosity when 25 ℃ of described lining coating and middle coating intermediates is 2000 ~ 4000Pa.s.
In the step (6), the viscosity during 25 ℃ of described adhesive linkage coating is 4500 ~ 8000Pa.s.
Compared with prior art, because the present invention adopts the fire proofing and the leather processing method of rational proportion, the superfine fibre automotive trim leather that utilizes the present invention to handle has had very big improvement on resultant effects such as content of formaldehyde, fracture tearing strength, hydrolysis xanthochromia, feel.Particularly sought out to making flame retardant effect reach the pH value scope of optimum state and having introduced quickly penetrating agent and levelling agent, provide cost savings, improved efficient, and the hydraulic fluid rate has been controlled in strictness, makes that the fire-retardant active ingredient on the base that is retained in the superfine denier polyamide leather is controlled at reasonable range.After the anti-60 ℃ of washings of the finished product of method production of the present invention 50 times, still have the fire retardant more than 90% to be retained on the leather.
The specific embodiment
The invention will be further described below in conjunction with specific embodiment.
The relative viscosity of polyamide 6 used in the present invention is 2.2 ~ 2.4, and density is 1.08g/cm3, and fusing point is 215 ~ 225 ℃; The poly relative viscosity of low viscosity is 2.4 ~ 2.6, and density is 0.92g/cm3, and fusing point is 98 ~ 110 ℃.
Employed emulsifying agent, levelling agent, bleeding agent, abscess conditioning agent are commercially available among the present invention, and emulsifying agent can adopt soap commonly used, Arabic gum or sodium alkyl benzene sulfonate; The levelling agent that levelling agent can adopt Shenzhen rent land bodyguard chemical industry Co., Ltd to produce; The weaving bleeding agent that bleeding agent can adopt grand Shen, Nantong chemical industry Co., Ltd to produce; The abscess conditioning agent has been the chemical substance of froth breaking effect, be added in the foam mixture with independent or compound form, counteracting agent as foam stabiliser, make abscess all or part of lose stable, be generally the methyl polysiloxane compounds, be used to prepare the special construction foams, as has a foam of natural sponge shape, the model that adopts Jiande City Shunfa Chemical Additive Co., Ltd. to produce in the embodiment of the invention is the abscess conditioning agent of SF-318, can improve the permeability of slurry, accelerate the replacing velocity of water and dimethyl formamide, can obviously improve the one-tenth flesh of product, increase the film forming abscess, can make PU layer film forming cell size even, become vertical, can improve the breathable moisture permeability of base, can improve and combine rerum naturas such as fastness, the peel strength of stable prod between PU layer and the base cloth.
Thickener used in the present invention is commercially available thickener, the thickener that can adopt Guangzhou Xuan Ning Chemical Industry Science Co., Ltd to produce.
Fire retardant used in the present invention is commercially available used for textiles fire retardant, and the model that can adopt Hangzhou many grace textile technology Co., Ltd to produce is the durable fire retardant of DP-150.
The trade mark that a fluid polyurethane resin used in the present invention can adopt the Wujiang to see the production of the chemical Co., Ltd of fortune is the liquid type wet processes polyurethane resin of GY-8080, solid content 〉=30 ± 1%, viscosity is 80000 ~ 160000(Cps/25 ℃), 100% modulus is 80 ± 5kg/cm
2, tensile strength is 450 ~ 550kg/cm
2, elongation is 500 ~ 600%.
Embodiment one: a kind of production method of superfine denier polyamide fiber system automotive trim leather of high flame retardant comprises following processing step:
(1) preparation super fine denier islands-in-sea type fibre: polyamide 6 is as island component, and low density polyethylene (LDPE) is 40:60 mixing and stirring with polyamide 6 and low density polyethylene (LDPE) according to mass ratio as extra large component, and mixing speed is 30 rev/mins, and mixing time is 15 minutes; Enter the fabric of island-in-sea type spinning pack by single extruder type spinning machine fusion stirring, extrude the formation tow through distribution plate and spinnerets, the temperature in screw extruder first district is 90 ℃, the temperature in second district is 180 ℃, the temperature in the 3rd district is 250 ℃, and the temperature in the 4th district is 280 ℃, and the temperature in the 5th district is 280 ℃, the temperature in the 6th district is 285 ℃, and the temperature of SECTOR-SEVEN is 285 ℃; The tow that obtains carries out drawing-off through three road drawing roller again, and the draw ratio of three road drawing roller is 1:2.2:3.5; Spinning oil in oil bath; After crimping machine curls, 50 ℃ of oven dry 10 minutes; It is that 50mm, fiber number are the staple fibre of 5.0dtex that cut-out makes length;
(2) make nonwoven fabric: the staple fibre that step (1) is obtained carries out thick shredding on thick opener, by blower fan the staple fibre of thick shredding is delivered to big bin mixing then, carry out smart shredding through five roller refined openers again, again through extreme trace hopper, air pressure face case feeding fiber, after the electronic scale weighing, after carrying out combing by carding machine, on the lapping machine, carry out lapping; On needing machine, puncture at last, obtain nonwoven fabric; The nonwoven fabric that obtains is neat with the nonwoven fabric cutting through bead cutter, carry out thermal contraction fixation, the temperature in thermal contraction fixation first district is 80 ℃, the temperature in second district is 100 ℃, the temperature in the 3rd district is 120 ℃, and the temperature in the 4th district is 130 ℃, and the temperature in the 5th district is 140 ℃, the nonwoven fabric speed of a motor vehicle is 5m/min, and the gap of shaping roller tube is: nonwoven fabric cloth thickness/1.1;
(3) wet method impregnation: the nonwoven fabric process that step (2) is obtained contains immersion liquid, push impregnation repeatedly through roller repeatedly, to contain immersion liquid evenly extruding infiltrate through in the nonwoven fabric, the coating weight that contains immersion liquid on the nonwoven fabric is 1.2 times of nonwoven fabric grammes per square metre, describedly contains immersion liquid and comprises following component, the component ratio is counted by weight: 100 parts of EU, 20 parts of dimethyl formamides, 0.5 part of emulsifying agent, 0.1 part of levelling agent, 1 part of bleeding agent, 0.5 part of abscess conditioning agent; The elastic modelling quantity that described EU contains immersion liquid is 70kg/cm
2, the described solid content that contains immersion liquid is 18%; Again with scraper with nonwoven fabric double-edged contain immersion liquid scrape clean after, solidify foaming by the aqueous solution that contains dimethyl formamide, setting time is 40 minutes, setting temperature is 25 ℃, the mass percentage concentration of the aqueous solution of dimethyl formamide is 18%; Then nonwoven fabric is washed by rinsing bowl, dimethyl formamide residual on the nonwoven fabric is washed off, obtain porous matter elastomeric polyethers type polyurethane nonwoven fabric wet method base;
(4) toluene decrement: the porous matter elastomeric polyethers type polyurethane nonwoven fabric wet method base that step (3) is obtained passes through 6 toluene grooves, and the temperature of toluene groove is 80 ℃; Pass through the residual toluene of rinsing bowl flush away again, the water temperature of rinsing bowl is 95 ℃, obtains polyamide leather base; The speed of a motor vehicle of described porous matter elastomeric polyethers type polyurethane nonwoven fabric wet method base is 3m/min;
(5) flame treatment: step (4) is handled the polyamide leather base obtain by containing the oil groove of fire-retardant treatment liquid, and through the squeezer roll extruding, pick-up rate is 70% again, and again 130 ℃ oven for drying, the speed of a motor vehicle of described polyamide leather base is 3 meters/minute; Described fire-retardant treatment liquid comprises following component, and the component ratio is counted by weight: water: 70 parts, fire retardant: 5 parts, mass percentage concentration is 20% Na
2HPO
4: 5 parts, bleeding agent: 0.03 part, levelling agent: 0.02 part; The pH value of described fire-retardant treatment liquid is 5;
(6) dry method veneer: successively be coated in release liners on by order from the bottom up investment precoat, middle coating intermediate, tack coat coating, described investment precoat makes surface layer at 80 ℃ of oven dry 15s, described middle coating intermediate makes the middle level at 80 ℃ of oven dry 25s, and described tack coat coating makes tack coat at 60 ℃ of oven dry 25s;
Described investment precoat and middle coating intermediate comprise following component, and the component ratio is counted by weight: polyurethane resin is 100 parts, N, dinethylformamide is: 10 parts, toluene is: 50 parts, fire retardant is: 5 parts, 2,2, 4-dinitrophenol is: 5 parts, thickener is: 1 part; The solid content of described polyurethane resin is 28%, and the modulus during described polyurethane resin 100% percentage elongation is 40kg/cm
2, the viscosity when 25 ℃ of described lining coating and middle coating intermediates is 2000Pa.s;
Described adhesive linkage coating is a fluid polyurethane resin; The solid content of a described fluid polyurethane resin is 30%, and the modulus during a described fluid polyurethane resin 100% percentage elongation is 20kg/cm
2, the viscosity during 25 ℃ of described adhesive linkage coating is 4500Pa.s;
(7) the polyamide leather base alignment and congruence that obtains of release liners that step (6) is obtained and step (5) after the drying, is peeled off release liners and polyamide leather base again, and bake out temperature is 120 ℃, and the speed of a motor vehicle is 4m/min, obtains described automotive trim leather.
Embodiment two: a kind of production method of superfine denier polyamide fiber system automotive trim leather of high flame retardant comprises following processing step:
(1) preparation super fine denier islands-in-sea type fibre: polyamide 6 is as island component, and low density polyethylene (LDPE) is 60:40 mixing and stirring with polyamide 6 and low density polyethylene (LDPE) according to mass ratio as extra large component, and mixing speed is 50 rev/mins, and mixing time is 20 minutes; Enter the fabric of island-in-sea type spinning pack by single extruder type spinning machine fusion stirring, extrude the formation tow through distribution plate and spinnerets, the temperature in screw extruder first district is 95 ℃, the temperature in second district is 185 ℃, the temperature in the 3rd district is 255 ℃, and the temperature in the 4th district is 285 ℃, and the temperature in the 5th district is 285 ℃, the temperature in the 6th district is 290 ℃, and the temperature of SECTOR-SEVEN is 295 ℃; The tow that obtains carries out drawing-off through three road drawing roller again, and the draw ratio of three road drawing roller is 1:2.8:4; Spinning oil in oil bath; After crimping machine curls, 75 ℃ of oven dry 5 minutes; It is that 55mm, fiber number are the staple fibre of 7.0dtex that cut-out makes length;
(2) make nonwoven fabric: the staple fibre that step (1) is obtained carries out thick shredding on thick opener, by blower fan the staple fibre of thick shredding is delivered to big bin mixing then, carry out smart shredding through five roller refined openers again, again through extreme trace hopper, air pressure face case feeding fiber, after the electronic scale weighing, after carrying out combing by carding machine, on the lapping machine, carry out lapping; On needing machine, puncture at last, obtain nonwoven fabric; The nonwoven fabric that obtains is neat with the nonwoven fabric cutting through bead cutter, carry out thermal contraction fixation, the temperature in thermal contraction fixation first district is 85 ℃, the temperature in second district is 105 ℃, the temperature in the 3rd district is 125 ℃, and the temperature in the 4th district is 135 ℃, and the temperature in the 5th district is 140 ℃, the nonwoven fabric speed of a motor vehicle is 10m/min, and the gap of shaping roller tube is: nonwoven fabric cloth thickness/1.5;
(3) wet method impregnation: the nonwoven fabric process that step (2) is obtained contains immersion liquid, push impregnation repeatedly through roller repeatedly, to contain immersion liquid evenly extruding infiltrate through in the nonwoven fabric, the coating weight that contains immersion liquid on the nonwoven fabric is 3.0 times of nonwoven fabric grammes per square metre, describedly contains immersion liquid and comprises following component, the component ratio is counted by weight: 100 parts of EU, 50 parts of dimethyl formamides, 3 parts of emulsifying agents, 0.5 part of levelling agent, 3 parts of bleeding agents, 3 parts of abscess conditioning agents; The elastic modelling quantity that described EU contains immersion liquid is 100 kg/cm
2, the described solid content that contains immersion liquid is 25%; Again with scraper with nonwoven fabric double-edged contain immersion liquid scrape clean after, solidify foaming by the aqueous solution that contains dimethyl formamide, setting time is 60 minutes, setting temperature is 45 ℃, the mass percentage concentration of the aqueous solution of dimethyl formamide is 25%; Then nonwoven fabric is washed by rinsing bowl, dimethyl formamide residual on the nonwoven fabric is washed off, obtain porous matter elastomeric polyethers type polyurethane nonwoven fabric wet method base;
(4) toluene decrement: the porous matter elastomeric polyethers type polyurethane nonwoven fabric wet method base that step (3) is obtained passes through 8 toluene grooves, and the temperature of toluene groove is 95 ℃; Pass through the residual toluene of rinsing bowl flush away again, the water temperature of rinsing bowl is 100 ℃, obtains polyamide leather base; The speed of a motor vehicle of described porous matter elastomeric polyethers type polyurethane nonwoven fabric wet method base is 8m/min;
(5) flame treatment: step (4) is handled the polyamide leather base obtain by containing the oil groove of fire-retardant treatment liquid, and through the squeezer roll extruding, pick-up rate is 90% again, and again 160 ℃ oven for drying, the speed of a motor vehicle of described polyamide leather base is 8 meters/minute; Described fire-retardant treatment liquid comprises following component, and the component ratio is counted by weight: water: 90 parts, fire retardant: 20 parts, mass percentage concentration is 35% Na
2CO
3: 10 parts, bleeding agent: 0.18 part, levelling agent: 0.05 part; The pH value of described fire-retardant treatment liquid is 7;
(6) dry method veneer: successively be coated in release liners on by order from the bottom up investment precoat, middle coating intermediate, tack coat coating, described investment precoat makes surface layer at 130 ℃ of oven dry 20s, described middle coating intermediate makes the middle level at 130 ℃ of oven dry 45s, and described tack coat coating makes tack coat at 100 ℃ of oven dry 35s;
Described investment precoat and middle coating intermediate comprise following component, and the component ratio is counted by weight: polyurethane resin is 100 parts, N, dinethylformamide is: 20 parts, toluene is: 60 parts, fire retardant is: 10 parts, 2,2, 4-dinitrophenol is: 15 parts, thickener is: 5 parts; The solid content of described polyurethane resin is 32%, and the modulus during described polyurethane resin 100% percentage elongation is 60kg/cm
2, the viscosity when 25 ℃ of described lining coating and middle coating intermediates is 4000Pa.s;
Described adhesive linkage coating is a fluid polyurethane resin; The solid content of a described fluid polyurethane resin is 50%, and the modulus during a described fluid polyurethane resin 100% percentage elongation is 45kg/cm
2, the viscosity during 25 ℃ of described adhesive linkage coating is 8000Pa.s;
(7) the polyamide leather base alignment and congruence that obtains of release liners that step (6) is obtained and step (5) after the drying, is peeled off release liners and polyamide leather base again, and bake out temperature is 150 ℃, and the speed of a motor vehicle is 8m/min, obtains described automotive trim leather.
Embodiment three: a kind of production method of superfine denier polyamide fiber system automotive trim leather of high flame retardant comprises following processing step:
(1) preparation super fine denier islands-in-sea type fibre: polyamide 6 is as island component, and low density polyethylene (LDPE) is 40:50 mixing and stirring with polyamide 6 and low density polyethylene (LDPE) according to mass ratio as extra large component, and mixing speed is 40 rev/mins, and mixing time is 19 minutes; Enter the fabric of island-in-sea type spinning pack by single extruder type spinning machine fusion stirring, extrude the formation tow through distribution plate and spinnerets, the temperature in screw extruder first district is 90 ℃, the temperature in second district is 190 ℃, the temperature in the 3rd district is 245 ℃, and the temperature in the 4th district is 275 ℃, and the temperature in the 5th district is 280 ℃, the temperature in the 6th district is 285 ℃, and the temperature of SECTOR-SEVEN is 285 ℃; The tow that obtains carries out drawing-off through three road drawing roller again, and the draw ratio of three road drawing roller is 1:2.4:3.6; Spinning oil in oil bath; After crimping machine curls, 60 ℃ of oven dry 7 minutes; It is that 53mm, fiber number are the staple fibre of 6.0dtex that cut-out makes length;
(2) make nonwoven fabric: the staple fibre that step (1) is obtained carries out thick shredding on thick opener, by blower fan the staple fibre of thick shredding is delivered to big bin mixing then, carry out smart shredding through five roller refined openers again, again through extreme trace hopper, air pressure face case feeding fiber, after the electronic scale weighing, after carrying out combing by carding machine, on the lapping machine, carry out lapping; On needing machine, puncture at last, obtain nonwoven fabric; The nonwoven fabric that obtains is neat with the nonwoven fabric cutting through bead cutter, carry out thermal contraction fixation, the temperature in thermal contraction fixation first district is 80 ℃, the temperature in second district is 110 ℃, the temperature in the 3rd district is 130 ℃, and the temperature in the 4th district is 135 ℃, and the temperature in the 5th district is 140 ℃, the nonwoven fabric speed of a motor vehicle is 8m/min, and the gap of shaping roller tube is: nonwoven fabric cloth thickness/1.2;
(3) wet method impregnation: the nonwoven fabric process that step (2) is obtained contains immersion liquid, push impregnation repeatedly through roller repeatedly, to contain immersion liquid evenly extruding infiltrate through in the nonwoven fabric, the coating weight that contains immersion liquid on the nonwoven fabric is 2.0 times of nonwoven fabric grammes per square metre, describedly contains immersion liquid and comprises following component, the component ratio is counted by weight: 100 parts of EU, 30 parts of dimethyl formamides, 2.2 parts of emulsifying agents, 0.3 part of levelling agent, 2 parts of bleeding agents, 1 part of abscess conditioning agent; The elastic modelling quantity that described EU contains immersion liquid is 90 kg/cm
2, the described solid content that contains immersion liquid is 22%; Again with scraper with nonwoven fabric double-edged contain immersion liquid scrape clean after, solidify foaming by the aqueous solution that contains dimethyl formamide, setting time is 50 minutes, setting temperature is 30 ℃, the mass percentage concentration of the aqueous solution of dimethyl formamide is 20%; Then nonwoven fabric is washed by rinsing bowl, dimethyl formamide residual on the nonwoven fabric is washed off, obtain porous matter elastomeric polyethers type polyurethane nonwoven fabric wet method base;
(4) toluene decrement: the porous matter elastomeric polyethers type polyurethane nonwoven fabric wet method base that step (3) is obtained passes through 7 toluene grooves, and the temperature of toluene groove is 90 ℃; Pass through the residual toluene of rinsing bowl flush away again, the water temperature of rinsing bowl is 96 ℃, obtains polyamide leather base; The speed of a motor vehicle of described porous matter elastomeric polyethers type polyurethane nonwoven fabric wet method base is 5m/min;
(5) flame treatment: step (4) is handled the polyamide leather base obtain by containing the oil groove of fire-retardant treatment liquid, and through the squeezer roll extruding, pick-up rate is 80% again, and again 150 ℃ oven for drying, the speed of a motor vehicle of described polyamide leather base is 5 meters/minute; Described fire-retardant treatment liquid comprises following component, and the component ratio is counted by weight: water: 80 parts, fire retardant: 15 parts, mass percentage concentration is 25% NaHCO
3: 6 parts, bleeding agent: 0.02 part, levelling agent: 0.03 part; The pH value of described fire-retardant treatment liquid is 6;
(6) dry method veneer: successively be coated in release liners on by order from the bottom up investment precoat, middle coating intermediate, tack coat coating, described investment precoat makes surface layer at 100 ℃ of oven dry 16s, described middle coating intermediate makes the middle level at 100 ℃ of oven dry 30s, and described tack coat coating makes tack coat at 80 ℃ of oven dry 30s;
Described investment precoat and middle coating intermediate comprise following component, and the component ratio is counted by weight: polyurethane resin is 100 parts, N, dinethylformamide is: 15 parts, toluene is: 55 parts, fire retardant is: 8 parts, 2,2, 4-dinitrophenol is: 10 parts, thickener is: 2 parts; The solid content of described polyurethane resin is 30%, and the modulus during described polyurethane resin 100% percentage elongation is 50kg/cm
2, the viscosity when 25 ℃ of described lining coating and middle coating intermediates is 3000Pa.s;
Described adhesive linkage coating is a fluid polyurethane resin; The solid content of a described fluid polyurethane resin is 40%, and the modulus during a described fluid polyurethane resin 100% percentage elongation is 35kg/cm
2, the viscosity during 25 ℃ of described adhesive linkage coating is 5000Pa.s;
(7) the polyamide leather base alignment and congruence that obtains of release liners that step (6) is obtained and step (5) after the drying, is peeled off release liners and polyamide leather base again, and bake out temperature is 130 ℃, and the speed of a motor vehicle is 5m/min, obtains described automotive trim leather.
Claims (7)
1. the production method of the superfine denier polyamide fiber system automotive trim of high flame retardant leather is characterized in that, comprises following processing step:
(1) preparation super fine denier islands-in-sea type fibre: polyamide 6 is as island component, low density polyethylene (LDPE) is as extra large component, is 40:60 ~ 60:40 mixing and stirring with polyamide 6 and low density polyethylene (LDPE) according to mass ratio, and mixing speed is 30 ~ 50 rev/mins, and mixing time is 15 ~ 20 minutes; Enter the fabric of island-in-sea type spinning pack by single extruder type spinning machine fusion stirring, extrude the formation tow through distribution plate and spinnerets, the temperature of single extruder type spinning machine is 90 ~ 295 ℃; The tow that obtains carries out drawing-off through three road drawing roller again, and the draw ratio of three road drawing roller is 1:2.2 ~ 2.8:3.5 ~ 4; Spinning oil in oil bath; After crimping machine curls, 50 ~ 75 ℃ of oven dry 5 ~ 10 minutes; It is that 50 ~ 55mm, fiber number are the staple fibre of 5.0 ~ 7.0dtex that cut-out makes length;
(2) make nonwoven fabric: the staple fibre that step (1) is obtained carries out thick shredding on thick opener, by blower fan the staple fibre of thick shredding is delivered to big bin mixing then, carry out smart shredding through five roller refined openers again, again through extreme trace hopper, air pressure hopper feeding fiber, after the electronic scale weighing, after carrying out combing by carding machine, on the lapping machine, carry out lapping; On needing machine, puncture at last, obtain nonwoven fabric; The nonwoven fabric that obtains is neat with the nonwoven fabric cutting through bead cutter, carries out thermal contraction fixation, and temperature is 80 ~ 140 ℃, and the nonwoven fabric speed of a motor vehicle is 5 ~ 10m/min, and the gap of shaping roller tube is: nonwoven fabric cloth thickness/1.1 ~ 1.5;
(3) wet method impregnation: the nonwoven fabric that step (2) is obtained is through containing immersion liquid, pushes impregnation repeatedly through roller repeatedly, will contain immersion liquid evenly extruding infiltrate through in the nonwoven fabric, the coating weight that contains immersion liquid on the nonwoven fabric is 1.2 ~ 3.0 times of nonwoven fabric grammes per square metre; Again with scraper with nonwoven fabric double-edged contain immersion liquid scrape clean after, solidify foaming by the aqueous solution that contains dimethyl formamide, setting time is 40 ~ 60 minutes, and setting temperature is 25 ~ 45 ℃, and the mass percentage concentration of the aqueous solution of dimethyl formamide is 18 ~ 25%; Then nonwoven fabric is washed by rinsing bowl, dimethyl formamide residual on the nonwoven fabric is washed off, obtain porous matter elastomeric polyethers type polyurethane nonwoven fabric wet method base;
Describedly contain immersion liquid and comprise following component, the component ratio is counted by weight: 100 parts of EU, 20 ~ 50 parts of dimethyl formamides, 0.5 ~ 3 part of emulsifying agent, 0.1 ~ 0.5 part of levelling agent, 1 ~ 3 part of bleeding agent, 0.5 ~ 3 part of abscess conditioning agent; The elastic modelling quantity that described EU contains immersion liquid is 70 ~ 100 kg/cm
2, the described solid content that contains immersion liquid is 18 ~ 25%;
(4) toluene decrement: the porous matter elastomeric polyethers type polyurethane nonwoven fabric wet method base that step (3) is obtained passes through 6 ~ 8 toluene grooves, and the temperature of toluene groove is 80 ~ 95 ℃; Pass through the residual toluene of rinsing bowl flush away again, the water temperature of rinsing bowl is 95 ~ 100 ℃, obtains polyamide leather base; The speed of a motor vehicle of described porous matter elastomeric polyethers type polyurethane nonwoven fabric wet method base is 3 ~ 8m/min;
(5) flame treatment: step (4) is handled the polyamide leather base obtain by containing the oil groove of fire-retardant treatment liquid, push through squeezer roll again, pick-up rate is 70 ~ 90%, and again 130 ~ 160 ℃ oven for drying, the speed of a motor vehicle of described polyamide leather base is 3 ~ 8 meters/minute;
(6) dry method veneer: successively be coated in release liners on by order from the bottom up investment precoat, middle coating intermediate, tack coat coating, described investment precoat makes surface layer at 80 ~ 130 ℃ of oven dry 15 ~ 20s, described middle coating intermediate makes the middle level at 80 ~ 130 ℃ of oven dry 25 ~ 45s, and described tack coat coating makes tack coat at 60 ~ 100 ℃ of oven dry 25 ~ 35s;
(7) the polyamide leather base alignment and congruence that obtains of release liners that step (6) is obtained and step (5), after the drying, release liners and polyamide leather base are peeled off, bake out temperature is 120 ~ 150 ℃ again, the speed of a motor vehicle is 4 ~ 8m/min, obtains described automotive trim leather.
2. the production method of automotive trim leather as claimed in claim 1, it is characterized in that: described fire-retardant treatment liquid comprises following component, the component ratio is counted by weight: water: 70 ~ 90 parts, fire retardant: 5 ~ 20 parts, alkali: 5 ~ 10 parts, bleeding agent: 0.03 ~ 0.18 part, levelling agent: 0.02 ~ 0.05 part; The pH value of described fire-retardant treatment liquid is 5 ~ 7; Described alkali is that mass percentage concentration is 20% ~ 35% Na
2HPO
4, Na
2CO
3, NaHCO
3Or mass percentage concentration is 20 ~ 35% ammoniacal liquor.
3. the production method of automotive trim leather as claimed in claim 1, it is characterized in that: in the step (6), described investment precoat and middle coating intermediate comprise following component, the component ratio is counted by weight: polyurethane resin is 100 parts, N, and dinethylformamide is: 10 ~ 20 parts, toluene is: 50 ~ 60 parts, fire retardant is: 5 ~ 10 parts, additive is: 5 ~ 15 parts, thickener is: 1 ~ 5 part; The solid content of described polyurethane resin is 28 ~ 32%, and the modulus during described polyurethane resin 100% percentage elongation is 40 ~ 60kg/cm
2
4. the production method of automotive trim leather as claimed in claim 3, it is characterized in that: described additive is 2,2, 4-dinitrophenol.
5. the production method of automotive trim leather as claimed in claim 1, it is characterized in that: in the step (6), described adhesive linkage coating is a fluid polyurethane resin; The solid content of a described fluid polyurethane resin is 30 ~ 50%, and the modulus during a described fluid polyurethane resin 100% percentage elongation is 20 ~ 45kg/cm
2
6. the production method of automotive trim as claimed in claim 1 leather is characterized in that: in the step (6), the viscosity when 25 ℃ of described investment precoat and middle coating intermediates is 2000 ~ 4000Pa.s.
7. the production method of automotive trim as claimed in claim 1 leather is characterized in that: in the step (6), the viscosity during 25 ℃ of described adhesive linkage coating is 4500 ~ 8000Pa.s.
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| CN103556489B (en) * | 2013-09-29 | 2016-10-05 | 福建华阳超纤有限公司 | A kind of automobile microfiber leather preparation method |
| CN104562437A (en) * | 2013-10-15 | 2015-04-29 | 上海华峰超纤材料股份有限公司 | High-simulation superfine fiber nylon-polyurethane base cloth and preparation method thereof |
| CN104846471A (en) * | 2015-05-06 | 2015-08-19 | 山东同大海岛新材料股份有限公司 | Preparation method of melt-blended flame retardant sea-island fibers |
| CN105178040A (en) * | 2015-08-19 | 2015-12-23 | 无锡双象超纤材料股份有限公司 | Preparation method for environment-friendly flame-retardant microfiber leather |
| CN105002742A (en) * | 2015-08-19 | 2015-10-28 | 无锡双象超纤材料股份有限公司 | Preparation method for environment-friendly type flame-retardant microfiber leather |
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| CN100570050C (en) * | 2007-10-12 | 2009-12-16 | 华伦皮塑（苏州）有限公司 | A kind of fire retarding polyurethane synthetic leather and preparation method thereof |
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