CN101798738B - Splitting method of non-woven impregnated base fabric - Google Patents
Splitting method of non-woven impregnated base fabric Download PDFInfo
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- CN101798738B CN101798738B CN2009102605972A CN200910260597A CN101798738B CN 101798738 B CN101798738 B CN 101798738B CN 2009102605972 A CN2009102605972 A CN 2009102605972A CN 200910260597 A CN200910260597 A CN 200910260597A CN 101798738 B CN101798738 B CN 101798738B
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Abstract
The invention provides a splitting method of a non-woven impregnated base fabric. The method comprises the following steps: providing a non-woven impregnated base fabric which comprises a non-woven fabric made of bicomponent composite fiber and polyurethane impregnated in the non-woven fabric, wherein the bicomponent composite fiber comprises a polyester component and a polyamide component; soaking the non-woven impregnated base fabric in an alkaline solution with the mass concentration less than 6%; heating the non-woven impregnated base fabric soaked in the alkaline solution to 80-105 DEG C, maintaining the temperature, and then fast cooling; and applying an external force on the fast cooled non-woven impregnated base fabric to separate the polyester from the polyamide so as to form polyester superfine fiber and polyamide superfine fiber. By soaking the non-woven impregnated base fabric in the alkaline solution, the invention can reduce the bonding force between the polyester component and the polyamide component; and by applying the external force on the non-woven impregnated base fabric to separate the polyester component from the polyamide component so as to respectively form the polyester superfine fiber and the polyamide superfine fiber, the invention enables the leather to inherit the stiffness of terylene and maintain the flexibility of nylon.
Description
Technical field
The present invention relates to artificial leather and make the field, be specifically related to a kind of fiber opening method of nonwoven fabric impregnation base cloth.
Background technology
Artificial leather is wear-resisting preferably, heat-resisting because of having, cold tolerance, high toughness and TENSILE STRENGTH are widely used.The artificial leather of producing after the impregnation of nonwoven fabric process PU (polyurethane) resin is called the PU synthetic leather; The PU synthetic leather has the decorative pattern and the gloss of natural leather, and it is high with its rich color, intensity, be not easy characteristic such as damage is widely used in industries such as rag trade, case and bag industry, physical culture industry, automobile making.
Superfine fibre PU synthetic leather is to have the artificial leather of fiber number less than the ultra-fine fiber construction of 0.33dtex, owing to brought into play the strong absorptive of superfine fibre, has therefore possessed the hygroscopicity that compares favourably with natural leather.In addition, superfine fibre PU synthetic leather has also surpassed natural leather at aspects such as chemical resistance, mildew-resistant sex change, quality homogeneity and machinabilitys.
In the prior art; Superfine fibre PU synthetic leather is generally according to following technology: form the compound islands-in-sea type fibre that comprises sea component and island component after at first using the co-blended spinning method with polyester components and polyamide component blend, fusion, extrusion molding, drafting forming, again with said compound islands-in-sea type fibre carry out combing, nonwoven fabric is processed in acupuncture.Then; Using polyurethane that nonwoven fabric is carried out impregnation handles; Be about to polyurethane and be filled in the fibre gap of nonwoven fabric, and then form polyester superfine fibre or superfine polyamide fiber, obtain superfine fibre PU synthetic leather with the removal sea component or the island component of solvent selectivity.
Under prior art, the technological process of nonwoven fabric impregnation is generally: dipping PVA (polyvinyl alcohol) → dipping PU → solidify → wash → extract out → drying, extraction wherein promptly refers to use the operation of removal of solvents sea component or island component.Because the superfine fiber chemical leather that adopts compound islands-in-sea type fibre method to process can only keep a kind of component fibers, like nylon (polyamide fiber) or terylene (polyester fiber), and the characteristics of nylon are too soft, and the characteristics of terylene are that rigidity is too strong.Therefore, if when only keeping the nylon component, though synthetic leather is soft, good hand touch, poor rigidity, the i.e. phenomenon of so-called " leather is not endured "; And when only keeping the terylene component, the synthetic leather rigidity is too strong, and feel is hardened.In addition, in extracting operation out, the part fiber is dissolved, cause the island number in the single precursor uncontrollable, and all there is randomness in the size on island, quantity, distribution and length thereof.
The inventor considers; With polyester components and polyamide component is after raw material is made composite fibre and processed nonwoven fabric; Nonwoven fabric impregnation polyurethane is obtained nonwoven fabric impregnation base cloth; Polyester components is separated with polyamide component obtain two kinds of component fibers in that it is handled, the deflection that then can make synthetic leather can possess terylene can be taken into account the flexibility of nylon again.
Summary of the invention
The technical problem that the present invention solves is; A kind of fiber opening method of nonwoven fabric impregnation base cloth is provided; Through this method; Nonwoven fabric impregnation base cloth is handled, made polyester components separate the superfine fibre that obtains two kinds of components with polyamide component, so that synthetic leather is inherited the deflection of terylene and kept the flexibility of nylon.
In order to solve above technical problem; The present invention provides a kind of fiber opening method with base cloth; Comprise: nonwoven fabric impregnation base cloth is provided; The nonwoven fabric that said nonwoven fabric impregnation base cloth is processed by bicomponent composite fibre with contain the polyurethane that is immersed in the said nonwoven fabric and form, the bi-component in the said bicomponent composite fibre is polyester components and polyamide component; With said nonwoven fabric impregnation base cloth with mass concentration less than 6% alkaline solution dipping; The nonwoven fabric impregnation base cloth of dipping alkaline solution is warming up to 80 ℃～105 ℃ insulations, then cooling fast; Quick cooled nonwoven fabric impregnation base cloth is applied external force, said polyester components is separated with polyamide component form polyester superfine fibre and superfine polyamide fiber respectively.
Preferably, saidly quick cooled nonwoven fabric impregnation base cloth applied external force be specially:
Quick cooled nonwoven fabric impregnation base cloth is used ultrasonic Treatment;
Rub the nonwoven fabric impregnation base cloth after the ultrasonic Treatment.
Preferably, the said nonwoven fabric impregnation base cloth of rubbing after the ultrasonic Treatment is specially:
Rub said nonwoven fabric impregnation base cloth under the room temperature;
Be to rub said nonwoven fabric impregnation base cloth under 85 ℃～120 ℃ the condition in temperature.
Preferably, the intensity of said ultrasonic Treatment is 5A～15A.
Preferably, the temperature of said quick cooling is 5 ℃～25 ℃.
Preferably, the mass concentration of said alkaline solution is 2%～4%.
Preferably, the holding temperature of the nonwoven fabric impregnation base cloth behind the said dipping alkaline solution is 85 ℃～100 ℃.
Preferably, skeleton portion described in the said bicomponent composite fibre and said sliver portion are by weight being 15～30: 70～85.
Preferably; Said bicomponent composite fibre comprises the skeleton portion that is radial arrangement and is filled in the sliver portion between the said skeleton portion; Said bi-component forms said skeleton portion and sliver portion respectively, and said skeleton portion and said sliver portion are by weight being 15～30: 70～85.
Preferably, the polyester components in the said bicomponent composite fibre forms said sliver portion, and said polyamide component forms said skeleton portion.
The present invention provides a kind of fiber opening method of nonwoven fabric impregnation base cloth; The nonwoven fabric that said nonwoven fabric impregnation base cloth is processed by bicomponent composite fibre with contain the polyurethane that is immersed in the said nonwoven fabric and form, the bi-component in the said bicomponent composite fibre is polyester components and polyamide component.The present invention is flooded nonwoven fabric impregnation base cloth earlier with the lower alkaline solution of concentration after; Can tentatively reduce polyester components and the adhesion between the polyamide component in the composite fibre; And then nonwoven fabric impregnation base cloth applied external force; Polyester components is separated with polyamide component form polyester superfine fibre and superfine polyamide fiber respectively; Can make leather in the deflection of inheriting terylene and keep the flexibility of nylon like this, and, therefore reduce the unit cost of synthetic leather owing to avoid removing a kind of component.
Description of drawings
The bicomponent composite fibre cross section pattern sketch map of Fig. 1, embodiment of the invention preparation;
Fig. 2, the present invention prepare the employed spinneret orifice schematic cross-section of bicomponent composite fibre;
The SEM photo of the nonwoven fabric impregnation base cloth of Fig. 3, embodiment of the invention preparation;
The superfine fibre PU synthetic leather SEM photo of Fig. 4, embodiment of the invention preparation.
The specific embodiment
In order further to understand the present invention, below in conjunction with embodiment the preferred embodiment of the invention is described, describe just to further specifying feature and advantage of the present invention but should be appreciated that these, rather than to the restriction of claim of the present invention.
The embodiment of the fiber opening method of a nonwoven fabric impregnation base cloth provided by the invention comprises:
Nonwoven fabric impregnation base cloth is provided, the nonwoven fabric that said nonwoven fabric impregnation base cloth is processed by bicomponent composite fibre with contain the polyurethane that is immersed in the said nonwoven fabric and form, the bi-component in the said bicomponent composite fibre is polyester components and polyamide component;
With said nonwoven fabric impregnation base cloth with mass concentration less than 6% alkaline solution dipping;
The nonwoven fabric impregnation base cloth of dipping alkaline solution is warming up to 80 ℃～105 ℃ insulations, then cooling fast;
Quick cooled nonwoven fabric impregnation base cloth is applied external force, said polyester components is separated with polyamide component form polyester superfine fibre and superfine polyamide fiber respectively.
According to the present invention; During the preparation bicomponent composite fibre; The section of getting polyester components is put into the section mixing, that get polyamide component of polyester screw extruder and is put into polyamide screw extruder melting mixing; Wherein, the melting temperature of polyester components is preferably 270 ℃～290 ℃, and the melting temperature of polyamide component is preferably 270 ℃～290 ℃;
Said polyester components can be selected following at least a polymer for use: PET, polybutylene terephthalate, polytrimethylene terephthalate, poly terephthalic acid-1; 4-hexamethylene dimethyl ester or gather 2; 6-naphthalene diacid second diester is preferably PET and polybutylene terephthalate;
Said polyamide component can be selected following at least a polymer for use: polycaprolactam (PA-6), polyhexamethylene adipamide (PA-66), nylon 46, poly hexamethylene adipamide pentanediamine, gather hexanoyl heptamethylene diamine, polyoctamethylene adipamide, polynonamethylene adipamide, poly hexamethylene adipamide agent decamethylene diamine, be preferably polycaprolactam and polyhexamethylene adipamide.
With two components respectively in screw extruder mixing after; Polyester components after mixing and polyamides component amine are passed through the spinnerets extrusion molding; Obtain as-spun fibre; Said as-spun fibre structure is as shown in Figure 1, comprises the fiber reinforcement portion 2 that is radial arrangement and is filled in the sliver portion 1 between the said fiber reinforcement portion.
According to the present invention, said spinnerets has the spinneret orifice of tangerine flap, and is as shown in Figure 2, is the schematic cross-section of spinneret orifice.Said spinneret orifice 11 cross sectional shapes are circular, comprise a plurality ofly being the skeleton extrusion cavities 11a of radial arrangement and being extruded sliver extrusion cavities 11b at interval by said skeleton.Like this; Two components of said polyester and polyamide can be extruded the formation composite fibre through said skeleton extrusion cavities and said sliver extrusion cavities respectively; The component of extruding from said skeleton extrusion cavities forms the skeleton portion of fiber, and the component of extruding from said sliver extrusion cavities forms the sliver portion of fiber.
According to the present invention, said sliver portion component: the skeleton portion component is by weight being 15: 85～30: 70, more preferably 20: 80～25: 75.Said polyester components can be used as sliver portion, and this moment, polyamide component was as skeleton portion.Said polyester components also can be used as skeleton portion, and this moment, polyamide component was as sliver portion.
According to the present invention, for the quantity of said skeleton extrusion cavities, do not have special restriction, can be 4～20.In Fig. 2, the quantity of skeleton extrusion cavities is 8, can form the sliver fiber of 8 distinguish like this.
After processing as-spun fibre, as-spun fibre is carried out one-level drawing-off at least, the total draft multiple is preferably 3～4 times; As-spun fibre after the drawing-off is oiled with the silanes finish, behind 70 ℃～80 ℃ laxation shapings, cut off, cut into the bicomponent composite fibre of 45mm～55mm sliver type.
According to the present invention, can use said bicomponent composite fibre to prepare nonwoven fabric according to method well known to those skilled in the art, soon after the shredding of bicomponent composite fibre process, the combing, nonwoven fabric is processed in acupuncture, and the density of nonwoven fabric is preferably 0.15g/cm
3～0.35g/cm
3, grammes per square metre is preferably 280g/m
2～800g/m
2
According to the present invention, behind the preparation nonwoven fabric, nonwoven fabric is carried out the impregnation processing obtain nonwoven fabric impregnation base cloth.When nonwoven fabric is carried out the impregnation processing, earlier nonwoven fabric is carried out the PVA impregnation, drying, the typing of plating again, PVA contains immersion liquid and preferably includes in mass concentration: 1%～3% polyvinyl alcohol, surplus are water.Nonwoven fabric carries out the PU impregnation again after the PVA impregnation, PU fully is filled in the fibre gap, and PU contains immersion liquid and preferably includes in mass: 12%～20% polyurethane, 1%～3.2% surfactant, surplus are DMF.Again the impregnation cloth after the said PU impregnation is sent in the solidification liquid and solidified, again through washing, the dry nonwoven fabric impregnation base cloth that finally obtains the PU impregnation.Said solidification liquid comprises 29%～39% DMF (dimethyl formamide), the water of surplus in mass.
According to the present invention; When nonwoven fabric is carried out the impregnation processing; Use earlier mass concentration less than 6%, preferred mass concentration is 1%～5%, more preferably mass concentration is 2%～4% alkaline solution impregnation process; Can tentatively reduce like this polyester components and polyamide component between adhesion, help separating of polyester components and polyamide component.The object lesson of alkaline solution can be KOH, NaOH, NH
4OH solution, but be not limited thereto.
Behind the dipping alkaline solution, nonwoven fabric impregnation base cloth is warming up to 80 ℃～105 ℃ is incubated, then cooling fast.When the nonwoven fabric base cloth cools off through soak more fast; Because the effect of shock heating quenching; Between polyester components and polyamide, produce bigger internal stress, under the effect of internal stress, can separate polyester components and polyamide component, form the superfine fibre of two kinds of components.According to the present invention, said holding temperature is preferably 85～100 ℃, more preferably 90 ℃～95 ℃.According to the present invention, the temperature of said quick cooling is preferably 5 ℃～25 ℃, more preferably 10 ℃～15 ℃.During insulation, preferred water steam heated in steam box; Fast cooling medium is preferably water-bath, during the implication of cooling, in steam box, after the insulation, puts in the water-bath at once and cools off fast.
According to the present invention, nonwoven fabric impregnation base cloth carried out the processing of shock heating quenching after, can apply external force to it and polyester components separated with polyamide component obtain polyester superfine fibre and superfine polyamide fiber respectively.According to the present invention, the said method that applies external force can and/or be rubbed processing with ultrasonic Treatment, for ultrasonic Treatment or rub the order of processing; The present invention does not have special restriction, preferably carries out ultrasonic Treatment earlier, and the intensity of said ultrasonic Treatment is preferably 5A～15A; 6A～12A more preferably, for the number of times of ultrasonic Treatment, the present invention does not have special restriction; Be preferably more preferably 6 times～9 times 5 times～10 times.Said rub to handle refer to rub nonwoven fabric impregnation base cloth with machinery so that the polyester components in the composite fibre is separated with polyamide component.Rubbing processing can carry out under room temperature and/high temperature; High temperature is rubbed treatment temperature and is preferably 92 ℃～108 ℃; More preferably 95 ℃～105 ℃, more preferably 97 ℃～103 ℃, the time that high temperature is rubbed processing is preferably 2 hours～and 10 hours; More preferably 3 hours～8 hours, more preferably 4 hours～7 hours.After opening fine the processing, obtain superfine fibre PU synthetic leather, neutralisation treatment, washing obtain finished product then.
In order further to understand the present invention, below in conjunction with embodiment nonwoven fabric provided by the invention is contained leaching method and describe.
Embodiment 1
Get 25 parts PET section put into polyester spinning screw extruder at 280 ℃ of melting mixings; Get 75 parts of polycaprolactam sections and put into polyamide spinning screw extruder at 280 ℃ of melting mixings.With the mixing product of two screw extruders through 8 distinguish spinnerets extrusion moldings as shown in Figure 2; Following examples all adopt this spinnerets extrusion molding; Obtain the as-spun fibre of 8 distinguish; Said as-spun fibre is made up of fiber reinforcement portion and the sliver portion that is filled between the said fiber reinforcement, and wherein fiber reinforcement portion composition is a PET, and sliver portion composition is a polycaprolactam;
Successively through 1.8 times, the drawing-off of 1.7 multiples, use concentration to oil as-spun fibre, after 70 ℃ of HEAT SETTING, obtain composite fibre, be cut into the composite fibre of 50mm then as 4wt% siloxanes finish.
Then said composite fibre shredding, combing, acupuncture being become density is 0.22g/cm
3, grammes per square metre is 520g/cm
2Nonwoven fabric;
With carrying out impregnation in the nonwoven fabric PVA impregnation machine, the PVA maceration extract comprises in mass concentration: 2% polyvinyl alcohol and excess water; Then nonwoven fabric is carried out drying at 100 ℃ and obtain the first impregnation base cloth;
With carrying out impregnation in the first impregnation base cloth importing PU impregnation machine; The PU maceration extract is in mass concentration; Comprise: 16% wet-method synthetic leather is with polyurethane resin P-138 (space field, Shandong chemical company provides), 2.2% sodium lauryl sulfate and surplus DMF; The mangle roller spacing of adjusting said PU impregnation machine obtains the second impregnation base cloth to base cloth thickness after the PU impregnation;
With solidifying in the second impregnation base cloth importing coagulating basin, solidification liquid comprises in mass concentration in the coagulating basin: 35% dimethyl formamide and excess water, solidification liquid temperature are 34 ℃;
Base cloth after will solidifying cleans the back with 80 ℃ water dries at 140 ℃, makes the PU synthetic leather, measures the PU synthesising leather performance and lists in table 3, and scanning electron microscopic observation, microscopic appearance such as Fig. 3 are used in sampling.
Be that with the difference of embodiment 1 fiber reinforcement portion polycaprolactam amine component does in the present embodiment, sliver portion composition is a PET, skeleton portion: sliver portion is by weight being 25: 75;
Other technology is identical with embodiment 1, preparation nonwoven fabric impregnation base cloth.
Embodiment 3
Get the nonwoven fabric impregnation base cloth of embodiment 1 preparation, the use mass concentration is 5% NaOH dipping; The nonwoven fabric impregnation base cloth of dipping NaOH solution is warming up to 90 ℃ of insulations 0.5 hour, cools off with 10 ℃ water-bath fast then;
The cooled nonwoven fabric impregnation of water-bath base cloth is used ultrasonic Treatment, and the intensity of ultrasonic Treatment is 6A, and the number of times of ultrasonic Treatment is 5 times;
Machinery is rubbed and is handled nonwoven fabric impregnation base cloth under the room temperature, and number of times is 6 times;
Again nonwoven fabric impregnation base cloth is warming up to 95 ℃ and rubs processing, the time is 5 hours, obtains superfine fibre PU synthetic leather, and is as shown in Figure 4, opens the superfine fibre PU synthetic leather SEM photo after fibre is handled for present embodiment, measures synthesising leather performance and list in table 1.
Embodiment 4
Get embodiment 1 preparation nonwoven fabric impregnation base cloth, the use mass concentration is 2% NaOH dipping; The nonwoven fabric impregnation base cloth of dipping NaOH solution is warming up to 100 ℃ of insulations 0.5 hour, cools off with 20 ℃ water-bath fast then;
The cooled nonwoven fabric impregnation of water-bath base cloth is used ultrasonic Treatment, and the intensity of ultrasonic Treatment is 14A, and the number of times of ultrasonic Treatment is 5 times;
Machinery is rubbed and is handled nonwoven fabric impregnation base cloth under the room temperature, and number of times is 6 times;
Again nonwoven fabric impregnation base cloth is warming up to 105 ℃ and rubs processing, the time is 5 hours, obtains superfine fibre PU synthetic leather, measures synthesising leather performance and lists in table 1.
Embodiment 5
Get embodiment 1 preparation nonwoven fabric impregnation base cloth, the use mass concentration is 3% NaOH dipping; The nonwoven fabric impregnation base cloth of dipping NaOH solution is warming up to 85 ℃ of insulations 0.5 hour, cools off with 5 ℃ water-bath fast then;
The cooled nonwoven fabric impregnation of water-bath base cloth is used ultrasonic Treatment, and the intensity of ultrasonic Treatment is 11A, and the number of times of ultrasonic Treatment is 5 times;
Machinery is rubbed and is handled nonwoven fabric impregnation base cloth under the room temperature, and number of times is 6 times;
Again nonwoven fabric impregnation base cloth is warming up to 90 ℃ and rubs processing, the time is 5 hours, obtains superfine fibre PU synthetic leather, measures synthesising leather performance and lists in table 1.
Embodiment 6
Get embodiment 1 preparation nonwoven fabric impregnation base cloth, the use mass concentration is 5% NaOH dipping; The nonwoven fabric impregnation base cloth of dipping NaOH solution is warming up to 105 ℃ of insulations 0.5 hour, cools off with 10 ℃ water-bath fast then;
The cooled nonwoven fabric impregnation of water-bath base cloth is used ultrasonic Treatment, and the intensity of ultrasonic Treatment is 6A, and the number of times of ultrasonic Treatment is 5 times;
Machinery is rubbed and is handled nonwoven fabric impregnation base cloth under the room temperature, and number of times is 6 times;
Again nonwoven fabric impregnation base cloth is warming up to 105 ℃ and rubs processing, the time is 5 hours, obtains superfine fibre PU synthetic leather, measures synthesising leather performance and lists in table 2.
Embodiment 7
Get embodiment 2 preparation nonwoven fabric impregnation base cloths, the use mass concentration is 5% NaOH dipping; The nonwoven fabric impregnation base cloth of dipping NaOH solution is warming up to 90 ℃ of insulations 0.5 hour, cools off with 10 ℃ water-bath fast then;
The cooled nonwoven fabric impregnation of water-bath base cloth is used ultrasonic Treatment, and the intensity of ultrasonic Treatment is 6A, and the number of times of ultrasonic Treatment is 5 times;
Machinery is rubbed and is handled nonwoven fabric impregnation base cloth under the room temperature, and number of times is 6 times;
Again nonwoven fabric impregnation base cloth is warming up to 95 ℃ and rubs processing, the time is 5 hours, obtains superfine fibre PU synthetic leather, measures synthesising leather performance and lists in table 2.
Embodiment 8
Get embodiment 2 preparation nonwoven fabric impregnation base cloths, the use mass concentration is 3% NaOH dipping; The nonwoven fabric impregnation base cloth of dipping NaOH solution is warming up to 100 ℃ of insulations 0.5 hour, cools off with 10 ℃ water-bath fast then;
The cooled nonwoven fabric impregnation of water-bath base cloth is used ultrasonic Treatment, and the intensity of ultrasonic Treatment is 6A, and the number of times of ultrasonic Treatment is 5 times;
Machinery is rubbed and is handled nonwoven fabric impregnation base cloth under the room temperature, and number of times is 6 times;
Again nonwoven fabric impregnation base cloth is warming up to 100 ℃ and rubs processing, the time is 5 hours, obtains superfine fibre PU synthetic leather, measures synthesising leather performance and lists in table 2.
The synthesising leather performance of table 1, the embodiment of the invention 3～5 preparations
The synthesising leather performance of table 2, the embodiment of the invention 6～8 preparations
The evaluation and test of superfine fibre PU synthetic leather sense of touch:
Tester: 15 leather sales forces
Test sample: the artificial leather of commercially available terylene leather, nylon leather and the embodiment of the invention 3 to 8 preparations and, numbering is followed successively by: 1,2,3,4,5,6,7,8
The tester catches and touches the leather sheet material, uses following evaluation criterion, and evaluation result is by maximum evaluation decisions.
The sense of touch evaluation criterion:
Zero: lining is soft partially
●: lining is hard partially
⊙: lining is suitably stiffening, and flexibility is moderate
Evaluation result: like table 3:
Table 3, the artificial PU synthetic leather composition of superfine fibre and sense of touch test result
Can know by above-mentioned result of the test; Adopting nonwoven fabric provided by the invention to contain leaching method can be retained in said fiber reinforcement portion and sliver portion in the leather simultaneously; And prevent that fiber and PU from removing from office adhesion; In the PU synthetic leather, form continuous microcellular structure, the PU synthetic leather that makes has promptly had the deflection of terylene and the flexibility of nylon concurrently through opening the sliver type superfine fibre PU synthetic leather that makes after fine the processing again, has fabulous elasticity and feel.
More than the fiber opening method of a kind of nonwoven fabric impregnation base cloth provided by the invention has been carried out detailed introduction.Used concrete example among this paper principle of the present invention and embodiment are set forth, the explanation of above embodiment just is used for helping to understand method of the present invention and core concept thereof.Should be pointed out that for those skilled in the art, under the prerequisite that does not break away from the principle of the invention, can also carry out some improvement and modification to the present invention, these improvement and modification also fall in the protection domain of claim of the present invention.
Claims (10)
1. the fiber opening method of a nonwoven fabric impregnation base cloth comprises:
Nonwoven fabric impregnation base cloth is provided, the nonwoven fabric that said nonwoven fabric impregnation base cloth is processed by bicomponent composite fibre with contain the polyurethane that is immersed in the said nonwoven fabric and form, the bi-component in the said bicomponent composite fibre is polyester components and polyamide component; Said nonwoven fabric is prepared by sliver type bicomponent composite fibre; Said sliver type bicomponent composite fibre is obtained through one-level drawing-off at least by as-spun fibre, and the total draft multiple is 3～4 times;
With said nonwoven fabric impregnation base cloth with mass concentration less than 6% alkaline solution dipping;
The nonwoven fabric impregnation base cloth of dipping alkaline solution is warming up to 80 ℃～105 ℃ insulations, then cooling fast;
Quick cooled nonwoven fabric impregnation base cloth is applied external force, said polyester components is separated with polyamide component form polyester superfine fibre and superfine polyamide fiber respectively.
2. fiber opening method according to claim 1 is characterized in that, saidly quick cooled nonwoven fabric impregnation base cloth is applied external force is specially:
Quick cooled nonwoven fabric impregnation base cloth is used ultrasonic Treatment;
Rub the nonwoven fabric impregnation base cloth after the ultrasonic Treatment.
3. fiber opening method according to claim 2 is characterized in that, the said nonwoven fabric impregnation base cloth of rubbing after the ultrasonic Treatment is specially:
Rub said nonwoven fabric impregnation base cloth under the room temperature;
Be to rub said nonwoven fabric impregnation base cloth under 85 ℃-120 ℃ the condition in temperature.
4. fiber opening method according to claim 2 is characterized in that, the intensity of said ultrasonic Treatment is 5A-15A.
5. fiber opening method according to claim 1 is characterized in that, the temperature of said quick cooling is 5 ℃-25 ℃.
6. fiber opening method according to claim 5 is characterized in that, the mass concentration of said alkaline solution is 2%-4%.
7. fiber opening method according to claim 1 is characterized in that, the holding temperature of the nonwoven fabric impregnation base cloth behind the said dipping alkaline solution is 85 ℃-100 ℃.
8. according to each described fiber opening method of claim 1 to 7; It is characterized in that; Said bicomponent composite fibre comprises the skeleton portion that is radial arrangement and is filled in the sliver portion between the said skeleton portion; Said bi-component forms said skeleton portion and sliver portion respectively, and said skeleton portion and said sliver portion are by weight being 15-30: 70-85.
9. fiber opening method according to claim 8 is characterized in that the polyester components in the said bicomponent composite fibre forms said skeleton portion, and said polyamide component forms said sliver portion.
10. fiber opening method according to claim 8 is characterized in that, the polyester components in the said bicomponent composite fibre forms said sliver portion, and said polyamide component forms said skeleton portion.
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| CN101798738A (en) | 2010-08-11 |
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