CN102517923B - Method for preparing ultra-soft high-resilience wet ultra-fine denier polyamide leather - Google Patents
Method for preparing ultra-soft high-resilience wet ultra-fine denier polyamide leather Download PDFInfo
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Abstract
The invention relates to a method for preparing ultra-soft high-resilience wet ultra-fine denier polyamide leather. The method comprises the following steps of: (1) preparing ultra-fine denier sea island fibers; (2) preparing a non-woven fabric; (3) ensuring that the non-woven fabric passes through impregnation liquid, and solidifying and foaming in an aqueous solution of dimethylformamide, wherein solidification time is 40 to 60 minutes, solidification temperature is between 25 and 45 DEG C, and the concentration of the aqueous solution of the dimethylformamide is 18.5 to 24.5 mass percent; and washing to obtain a porous elastomer polyether polyurethane non-woven fabric wet substrate; (4) ensuring that the porous elastomer polyether polyurethane non-woven fabric wet substrate passes through a toluene tank to obtain a polyamide leather substrate; and (5) drying the polyamide leather substrate, impregnating into leather softening liquid, drying and tentering; and tanning the polyamide leather substrate by using a continuous tanning machine to obtain the ultra-fine denier polyamide leather. By the method, the current situation that the softness and resilience of imitated leather are inferior to those of genuine leather is avoided, and the special requirement of people on ultra-soft high-resilience ultra-fiber leather is met.
Description
Technical field
The present invention relates to a kind of manufacture method of polyamide leather, the manufacture method of the high resilience wet type of especially a kind of ultra-soft superfine denier polyamide leather.
Background technology
Present domestic superfine fiber polyurethane leather is mainly used in footwear, case and bag class, sofa automotive trim class, ball, gloves class etc.Along with the transformation of people's consumption idea, compare with this series products with feel, elasticity, the comfort of natural leather, require with expectation also more and more higher.Superfine fiber polyurethane leather has adopted and the similar bundle superfine fibre of natural leather, but common superfine fibre PAUR synthetic leather still has no small gap with corium on feel and resilience.
Summary of the invention
The objective of the invention is to overcome the deficiencies in the prior art, the manufacture method of the high resilience wet type of a kind of ultra-soft superfine denier polyamide leather is provided, make base cloth have the corium feel of the high resilience of ultra-soft, thereby replace corium.
According to technical scheme provided by the invention, the manufacture method of the high resilience wet type of described ultra-soft superfine denier polyamide 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 1.5 ~ 3.5 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 18.5 ~ 24.5%; Then nonwoven fabric is washed by rinsing bowl, dimethyl formamide residual on the nonwoven fabric is washed off, the water temperature of rinsing bowl is 60 ~ 90 ℃, obtains 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) put in order behind the polyamide leather base: the polyamide leather base that step (4) is obtained is through the prebake of seven layers of trawlnet formula baking oven, and temperature of oven is 70 ~ 100 ℃; Polyamide leather base is drawn fully impregnation in the liquid bath that contains the leather softening agent, the impregnation time is 4 ~ 8 minutes again; Squeeze the unnecessary leather softening agent of polyamide leather substrate surface through rubber rollers then, the hydraulic fluid rate is 50 ~ 90%; Through the expanding dryer polyamide leather base is dried tentering again, bake out temperature is 130 ~ 160 ℃, and the speed of a motor vehicle of described polyamide leather base is 3 ~ 8m/min; After rub the skin machine continuously polyamide leather base is rubbed skin, the dental lamina gap of rubbing the skin machine continuously is 3 ~ 6cm, and the dental lamina hunting frequency is 200 ~ 300 rev/mins, obtains described superfine denier polyamide leather.
In the step (2), the pricker that described needing machine adopts is: needle handle number is 15, and the pin waist number is 18, and needle number is 32, and pricker length is 3 inches, and hook thorn number is 1 ~ 6; Adopt the needling process of the low deeply drawing-off of the close low pin of principle of readjustment, restructuring, consolidation and improvement.
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 described elastic modelling quantity that contains immersion liquid is 70 ~ 100 kg/cm
2
The solid content that described EU contains immersion liquid is 18 ~ 25%.
Described EU is obtained by polyether polyol, expansion stick (MDI), isocyanates, crosslinking agent, water and polymerization catalyst.
In the step (5), described leather softening agent is that mass percentage concentration is 10 ~ 15% leather softener solution.
The present invention adopts the EU resin to contain in the needle punched non-woven fabrics that is immersed under the special process, through decrement, the oven dry that oils, rub skin, makes base cloth have the corium feel of the high resilience of ultra-soft, thereby replaces corium; Solved the flexibility of emulational leather in the market and elasticity not as the present situation of corium, satisfied the specific (special) requirements of people the high resilience micro fiber leather leather of ultra-soft.
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 ℃.
EU used in the present invention is obtained by polyether polyol, expansion stick (MDI), isocyanates, crosslinking agent, water and polymerization catalyst.
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.
Leather softener used in the present invention is commercially available leather softener.
Embodiment one: the manufacture method of the high resilience wet type of a kind of ultra-soft superfine denier polyamide leather 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; Puncture on needing machine at last, obtain nonwoven fabric, the pricker that described needing machine adopts is: needle handle number is 15, and the pin waist number is 18, and needle number is 32, and pricker length is 3 inches, and hook thorn number is 1; Adopt the needling process of the low deeply drawing-off of the close low pin of principle of readjustment, restructuring, consolidation and improvement; 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 the even extruding of immersion liquid and infiltrate through in the nonwoven fabric, the coating weight that contains immersion liquid on the nonwoven fabric is 1.5 times of nonwoven fabric grammes per square metre, and described EU 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 solid content that described EU 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 18.5%; Then nonwoven fabric is washed by rinsing bowl, dimethyl formamide residual on the nonwoven fabric is washed off, the water temperature of rinsing bowl is 60 ℃, obtains 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) put in order behind the polyamide leather base: the polyamide leather base that step (4) is obtained is through the prebake of seven layers of trawlnet formula baking oven, and temperature of oven is 70 ℃; Polyamide leather base is drawn fully impregnation in the liquid bath that contains the leather softening agent, the impregnation time is 4 minutes again; Squeeze the unnecessary leather softening agent of polyamide leather substrate surface through rubber rollers then, the hydraulic fluid rate is 50%, and described leather softening agent is that mass percentage concentration is 10% leather softener solution; Through the expanding dryer polyamide leather base is dried tentering again, bake out temperature is 130 ℃, and the speed of a motor vehicle of described polyamide leather base is 3m/min; After rub the skin machine continuously polyamide leather base is rubbed skin, the dental lamina gap of rubbing the skin machine continuously is 3cm, and the dental lamina hunting frequency is 200 rev/mins, obtains described superfine denier polyamide leather.
Embodiment two: the manufacture method of the high resilience wet type of a kind of ultra-soft superfine denier polyamide leather 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; Puncture on needing machine at last, obtain nonwoven fabric, the pricker that described needing machine adopts is: needle handle number is 15, and the pin waist number is 18, and needle number is 32, and pricker length is 3 inches, and hook thorn number is 6; Adopt the needling process of the low deeply drawing-off of the close low pin of principle of readjustment, restructuring, consolidation and improvement; 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 the even extruding of immersion liquid and infiltrate through in the nonwoven fabric, the coating weight that contains immersion liquid on the nonwoven fabric is 3.5 times of nonwoven fabric grammes per square metre, and described EU 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 solid content that described EU 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 24.5%; Then nonwoven fabric is washed by rinsing bowl, dimethyl formamide residual on the nonwoven fabric is washed off, the water temperature of rinsing bowl is 90 ℃, obtains 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) put in order behind the polyamide leather base: the polyamide leather base that step (4) is obtained is through the prebake of seven layers of trawlnet formula baking oven, and temperature of oven is 100 ℃; Polyamide leather base is drawn fully impregnation in the liquid bath that contains the leather softening agent, the impregnation time is 8 minutes again; Squeeze the unnecessary leather softening agent of polyamide leather substrate surface through rubber rollers then, the hydraulic fluid rate is 90%, and described leather softening agent is that mass percentage concentration is 15% leather softener solution; Through the expanding dryer polyamide leather base is dried tentering again, bake out temperature is 160 ℃, and the speed of a motor vehicle of described polyamide leather base is 8m/min; After rub the skin machine continuously polyamide leather base is rubbed skin, the dental lamina gap of rubbing the skin machine continuously is 6cm, and the dental lamina hunting frequency is 300 rev/mins, obtains described superfine denier polyamide leather.
Embodiment three: the manufacture method of the high resilience wet type of a kind of ultra-soft superfine denier polyamide leather 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 50:50 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 16 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 1:2.6:3.6; Spinning oil in oil bath; After crimping machine curls, 65 ℃ of oven dry 8 minutes; It is that 52mm, 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; Puncture on needing machine at last, obtain nonwoven fabric, the pricker that described needing machine adopts is: needle handle number is 15, and the pin waist number is 18, and needle number is 32, and pricker length is 3 inches, and hook thorn number is 2; Adopt the needling process of the low deeply drawing-off of the close low pin of principle of readjustment, restructuring, consolidation and improvement; 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 6m/min, and the gap of shaping roller tube is: nonwoven fabric cloth thickness/1.3;
(3) wet method impregnation: the nonwoven fabric process that step (2) is obtained contains immersion liquid, push impregnation repeatedly through roller repeatedly, to contain the even extruding of immersion liquid and 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, and described EU contains immersion liquid and comprises following component, the component ratio is counted by weight: 100 parts of EU, 30 parts of dimethyl formamides, 2 parts of emulsifying agents, 0.2 part of levelling agent, 2 parts of bleeding agents, 2 parts of abscess conditioning agents; The elastic modelling quantity that described EU contains immersion liquid is 90 kg/cm
2, the solid content that described EU contains immersion liquid is 24%; 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 35 ℃, the mass percentage concentration of the aqueous solution of dimethyl formamide is 20.5%; Then nonwoven fabric is washed by rinsing bowl, dimethyl formamide residual on the nonwoven fabric is washed off, the water temperature of rinsing bowl is 80 ℃, obtains 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) put in order behind the polyamide leather base: the polyamide leather base that step (4) is obtained is through the prebake of seven layers of trawlnet formula baking oven, and temperature of oven is 80 ℃; Polyamide leather base is drawn fully impregnation in the liquid bath that contains the leather softening agent, the impregnation time is 6 minutes again; Squeeze the unnecessary leather softening agent of polyamide leather substrate surface through rubber rollers then, the hydraulic fluid rate is 60%, and described leather softening agent is that mass percentage concentration is 12% leather softener solution; Through the expanding dryer polyamide leather base is dried tentering again, bake out temperature is 140 ℃, and the speed of a motor vehicle of described polyamide leather base is 5m/min; After rub the skin machine continuously polyamide leather base is rubbed skin, the dental lamina gap of rubbing the skin machine continuously is 5cm, and the dental lamina hunting frequency is 250 rev/mins, obtains described superfine denier polyamide leather.
Claims (5)
1. the manufacture method of the high resilience wet type of a ultra-soft superfine denier polyamide 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 1.5 ~ 3.5 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 18.5 ~ 24.5%; Then nonwoven fabric is washed by rinsing bowl, dimethyl formamide residual on the nonwoven fabric is washed off, the water temperature of rinsing bowl is 60 ~ 90 ℃, obtains 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 described elastic modelling quantity that contains immersion liquid is 70 ~ 100 kg/cm
2
(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) put in order behind the polyamide leather base: the polyamide leather base that step (4) is obtained is through the prebake of seven layers of trawlnet formula baking oven, and temperature of oven is 70 ~ 100 ℃; Polyamide leather base is drawn fully impregnation in the liquid bath that contains the leather softening agent, the impregnation time is 4 ~ 8 minutes again; Squeeze the unnecessary leather softening agent of polyamide leather substrate surface through rubber rollers then, the hydraulic fluid rate is 50 ~ 90%; Through the expanding dryer polyamide leather base is dried tentering again, bake out temperature is 130 ~ 160 ℃, and the speed of a motor vehicle of described polyamide leather base is 3 ~ 8m/min; After rub the skin machine continuously polyamide leather base is rubbed skin, the dental lamina gap of rubbing the skin machine continuously is 3 ~ 6cm, and the dental lamina hunting frequency is 200 ~ 300 rev/mins, obtains described superfine denier polyamide leather.
2. the manufacture method of polyamide leather as claimed in claim 1 is characterized in that: in the step (2), the pricker that described needing machine adopts is: needle handle number is 15, and the pin waist number is 18, and needle number is 32, and pricker length is 3 inches, and hook thorn number is 1 ~ 6; Adopt the needling process of the low deeply drawing-off of the close low pin of principle of readjustment, restructuring, consolidation and improvement.
3. the manufacture method of polyamide leather as claimed in claim 1 is characterized in that: the solid content that described EU contains immersion liquid is 18 ~ 25%.
4. the manufacture method of polyamide leather as claimed in claim 1 is characterized in that: described EU is obtained by polyether polyol, expansion stick MDI, isocyanates, crosslinking agent, water and polymerization catalyst.
5. the manufacture method of polyamide leather as claimed in claim 1 is characterized in that: in the step (5), described leather softening agent is that mass percentage concentration is 10 ~ 15% leather softener solution.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201110398055 CN102517923B (en) | 2011-12-05 | 2011-12-05 | Method for preparing ultra-soft high-resilience wet ultra-fine denier polyamide leather |
Applications Claiming Priority (1)
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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 |
| CN103806242B (en) * | 2014-01-27 | 2015-09-30 | 禾欣可乐丽超纤皮(嘉兴)有限公司 | Microfiber synthetic leather dry type toluene removal method |
| CN104532474B (en) * | 2014-12-11 | 2017-05-03 | 无锡双象超纤材料股份有限公司 | Manufacturing method of imitated cow top layer leather oily leather |
| CN104674562B (en) * | 2015-03-03 | 2017-03-01 | 上海华峰超纤材料股份有限公司 | The method preparing island superfine fiber PU leather base cloth using addition type three-proof finishing agent |
| CN109367153A (en) * | 2018-10-22 | 2019-02-22 | 科（福建）超纤有限责任公司 | A kind of high imitative head layer ox-hide PU leather and preparation method thereof |
| CN113388919B (en) * | 2021-05-24 | 2023-04-21 | 江苏华峰超纤材料有限公司 | LDPE/PA6 sea-island fiber and preparation method thereof |
| CN115233328B (en) * | 2022-09-23 | 2022-12-06 | 中山大学 | Preparation method of superfine fluororubber fiber |
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| CN1152649A (en) * | 1995-12-20 | 1997-06-25 | 济南耀福塑胶有限公司 | Nature-like leather and productive method |
| CN101591860B (en) * | 2008-05-30 | 2011-03-23 | 上海华峰超纤材料股份有限公司 | Scratch resistant processing method of non-figured island ultrafine fiber napped leather |
| CN101629387B (en) * | 2009-07-30 | 2012-11-21 | 山东同大纺织印染有限公司 | Micro-fiber knitted fabric synthetic leather and manufacturing method thereof |
| CN102011326B (en) * | 2010-12-13 | 2012-09-19 | 禾欣可乐丽超纤皮(嘉兴)有限公司 | Preparation method of superfine fiber artificial leather base fabric |
| CN102212183A (en) * | 2011-05-03 | 2011-10-12 | 烟台华大化学工业有限公司 | Polyurethane resin used for skin-imitated superfine fiber synthetic leather, and preparation method thereof |
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