CN105063793A - Super-fine denier flame-retardant polyurethane short fiber and preparation method thereof - Google Patents
Super-fine denier flame-retardant polyurethane short fiber and preparation method thereof Download PDFInfo
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- CN105063793A CN105063793A CN201510479924.9A CN201510479924A CN105063793A CN 105063793 A CN105063793 A CN 105063793A CN 201510479924 A CN201510479924 A CN 201510479924A CN 105063793 A CN105063793 A CN 105063793A
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Abstract
The invention relates to a super-fine denier flame-retardant polyurethane short fiber, which is prepared by taking low density polyethylene as the sea component and adopting polyurethane and a phosphorus based flame retardant as the island component. Specifically, the mass ratio of the polyurethane, low density polyethylene and phosphorus based flame retardant is 1:0.8-1.2:0.2-0.5. The preparation method includes: firstly slicing polyurethane and conducting drying, then mixing the polyurethane slices with the phosphorus based flame retardant, then using a twin-screw sea island type composite spinning technique, letting the molten polyurethane and phosphorus based flame retardant change into multiple strands of trickles to be wrapped by molten low density polyethylene respectively at a spinneret hole inlet, and subjecting the extruded tows to cooling, oiling, godet, bundling, oil bath drafting, curling, relaxation heat-setting, and cutting, thus obtaining the super-fine denier flame-retardant polyurethane short fiber. The preparation method provided by the invention is simple, the steps are easy to operate, and employs low density polyethylene as the sea component and adopts polyurethane as the sea component and the phosphorus based flame retardant as the island component to prepare polyurethane short fiber. And the prepared polyurethane short fiber has excellent flame retardant performance.
Description
Technical field
The present invention relates to a kind of super fine denier flame retardant polyurethane staple fibre and preparation method thereof, belong to polyurethane staple fibre preparing technical field.
Background technology
Islands-in-sea bicomponent fibre manufactures the new technology of superfine fibre, and he is a kind of polymer with the formal distribution of multiple superfine fento and island component in the polymer of another kind of sea component.Sea component dissolves after making woven fabric or knitted fabric by this fibrid, and the island component fento stayed in fabric just becomes superfine fibre.The synthetic leather adopting this kind of superfine fibre to prepare is widely used in the field such as clothes, furniture, but the polyurethane staple fibre fire resistance of preparation is poor at present, and preparation method is complicated, greatly hinders the application of this kind of fibers material.
Summary of the invention
The object of the invention is to solve existing polyurethane staple fibre fire resistance not good, the problem of preparation method's complexity, providing a kind of preparation method simple, polyurethane staple fibre fire resistance good super fine denier flame retardant polyurethane staple fibre and preparation method thereof.
The present invention adopts following technical scheme: a kind of super fine denier flame retardant polyurethane staple fibre, described polyurethane staple fibre take low density polyethylene (LDPE) as sea component, make for island component with polyurethane, phosphorus flame retardant, wherein polyurethane, low density polyethylene (LDPE), phosphorus flame retardant mass ratio are: 1:0.8 ~ 1.2:0.2 ~ 0.5.
Further, described phosphorus flame retardant is formed by methyl phosphorus and the copolymerization of ring-type phosphorus.
The preparation method of super fine denier flame retardant polyurethane staple fibre, comprises the steps:
(1) first by polyurethane chip drying, dryer is adopted to be divided into three steps to dry successively: temperature during first step prebake is 50 ~ 60 DEG C of drying times is 30 ~ 60min, second step bake out temperature is 60 ~ 80 DEG C, drying time is 40 ~ 60min, 3rd step bake out temperature is 80 ~ 90 DEG C, drying time is 40 ~ 60min, the stirring frequency of dryer is 5 ~ 30r/min, then the polyurethane of having dried section and phosphorus flame retardant are got to pre-mixer by automatic material-absorbing device mix according to quality proportioning 1:0.2 ~ 0.5, mixing time: 15 ~ 30min, stirring frequency: 30 ~ 60r/min,
(2) adopt twin-screw sea-island-type composite spun method, by the polyurethane of melting and phosphorus flame retardant through fabric of island-in-sea type spinning plate become the low density polyethylene (LDPE) that multiply thread is melted in spinneret orifice porch wrap up respectively, extrude tow through cool, oiling, draw-off godet, boundling, oil bath drawing-off, curling, relaxation heat setting and cut off and obtain super fine denier flame retardant polyurethane staple fibre.
Further, before the filter of the screw rod of described melting polyurethane and phosphorus flame retardant, pressure is 70 ~ 80Pa, and after filter, pressure is 60 ~ 75Pa, and rotating speed is 20 ~ 30r/min, and melt temperature is 250 ~ 295 DEG C.
Further, before the filter of the screw rod of described melting low density polyethylene (LDPE), pressure is 75 ~ 90Pa, and after filter, pressure is 65 ~ 80Pa, and rotating speed is 15 ~ 25r/min, and melt temperature is 90 ~ 250 DEG C.
Further, adopt cooling blower to extrude tow cooling in described step (2), the chilling temperature of cooling blower is 18 ~ 28 DEG C, and cooling blower wind speed is 27 ~ 28m/s, and blast is 800 ~ 1000Pa.
Further, described in the oil mass concentration of finish be 1 ~ 3%, the mass concentration of oil bath drawing-off finish is 5 ~ 10%, and the temperature of oil bath drawing-off is 40 ~ 60 DEG C.
Further, described oil bath drawing-off is divided into three road drawing-offs, one drafting multiple: 1.0 ~ 1.5; Two road drafting multiples: 1.5 ~ 2.0; Three road drafting multiples: 1.2 ~ 1.5.
Further, described curling number is 13 ~ 18/25mm, and line density is 3.5 ~ 6dtex, and moisture is 1.5 ~ 3%, and oil content is 0.6 ~ 1.1%, fracture: > 2.8cn/dtex, percentage elongation is 80 ~ 120%, and fibre length is 50 ~ 52mm.
Preparation method of the present invention is simple, and step is easy to operation, take low density polyethylene (LDPE) as sea component, and make polyurethane staple fibre with polyurethane, Phosphorous Flame-Retardant Polyester for island component, the polyurethane staple fibre made has excellent fire resistance.
Detailed description of the invention
Below in conjunction with specific embodiment, the present invention is further illustrated.
Embodiment one:
A kind of super fine denier flame retardant polyurethane staple fibre take low density polyethylene (LDPE) as sea component, and make for island component with polyurethane, phosphorus flame retardant, wherein polyurethane, low density polyethylene (LDPE), phosphorus flame retardant mass ratio are: 1:0.8 ~ 1.2:0.2 ~ 0.5.
The preparation method of super fine denier flame retardant polyurethane staple fibre, comprises the steps:
(1) first by polyurethane chip drying, dryer is adopted to be divided into three steps to dry successively: temperature during first step prebake is 50 DEG C of drying times is 30min, second step bake out temperature is 60 DEG C, drying time is 40min, 3rd step bake out temperature is 80 DEG C, drying time is 40min, the stirring frequency of dryer is 5r/min, then the polyurethane of having dried section and phosphorus flame retardant are got to pre-mixer by automatic material-absorbing device mix according to quality proportioning 1:0.2, mixing time: 15min, stirring frequency: 30r/min;
(2) twin-screw sea-island-type composite spun method is adopted, the polyurethane of melting and phosphorus flame retardant are become through fabric of island-in-sea type spinning plate the low density polyethylene (LDPE) that multiply thread is melted in spinneret orifice porch wrap up respectively, extrude tow through cooling, oil, draw-off godet, boundling, oil bath drawing-off, curling, relaxation heat setting, super fine denier flame retardant polyurethane staple fibre obtained with cut-out, before the filter of the screw rod of melting polyurethane and phosphorus flame retardant, pressure is 70Pa, after filter, pressure is 60Pa, rotating speed is 20r/min, melt temperature is 250 DEG C, before the filter of the screw rod of described melting low density polyethylene (LDPE), pressure is 75Pa, after filter, pressure is 65Pa, rotating speed is 15r/min, melt temperature is 90 DEG C, cooling blower is adopted to extrude tow cooling, the chilling temperature of cooling blower is 18 DEG C, cooling blower wind speed is 27m/s, blast is 800Pa, the mass concentration of finish of oiling is 1%, the mass concentration of oil bath drawing-off finish is 5%, the temperature of oil bath drawing-off is 40 DEG C, oil bath drawing-off is divided into three road drawing-offs, one drafting multiple: 1.0, two road drafting multiples: 1.5, three road drafting multiples: 1.2, curling number is 13/25mm, and line density is 3.5dtex, and moisture is 1.5%, and oil content is 0.6%, fracture: > 2.8cn/dtex, percentage elongation is 80%, and fibre length is 50mm.
Embodiment two:
A kind of super fine denier flame retardant polyurethane staple fibre take low density polyethylene (LDPE) as sea component, and make for island component with polyurethane, phosphorus flame retardant, wherein polyurethane, low density polyethylene (LDPE), phosphorus flame retardant mass ratio are: 1:0.8 ~ 1.2:0.2 ~ 0.5.
The preparation method of super fine denier flame retardant polyurethane staple fibre, comprises the steps:
(1) first by polyurethane chip drying, dryer is adopted to be divided into three steps to dry successively: temperature during first step prebake is 55 DEG C of drying times is 40min, second step bake out temperature is 70 DEG C, drying time is 50min, 3rd step bake out temperature is 85 DEG C, drying time is 50min, the stirring frequency of dryer is 20r/min, then the polyurethane of having dried section and phosphorus flame retardant are got to pre-mixer by automatic material-absorbing device mix according to quality proportioning 1:0.3, mixing time: 20min, stirring frequency: 40r/min;
(2) twin-screw sea-island-type composite spun method is adopted, the polyurethane of melting and phosphorus flame retardant are become through fabric of island-in-sea type spinning plate the low density polyethylene (LDPE) that multiply thread is melted in spinneret orifice porch wrap up respectively, extrude tow through cooling, oil, draw-off godet, boundling, oil bath drawing-off, curling, relaxation heat setting, super fine denier flame retardant polyurethane staple fibre obtained with cut-out, before the filter of the screw rod of melting polyurethane and phosphorus flame retardant, pressure is 75Pa, after filter, pressure is 65Pa, rotating speed is 25r/min, melt temperature is 275 DEG C, before the filter of the screw rod of described melting low density polyethylene (LDPE), pressure is 80Pa, after filter, pressure is 70Pa, rotating speed is 20r/min, melt temperature is 150 DEG C, cooling blower is adopted to extrude tow cooling, the chilling temperature of cooling blower is 20 DEG C, cooling blower wind speed is 25m/s, blast is 900Pa, the mass concentration of finish of oiling is 2%, the mass concentration of oil bath drawing-off finish is 7%, the temperature of oil bath drawing-off is 50 DEG C, oil bath drawing-off is divided into three road drawing-offs, one drafting multiple: 1.2, two road drafting multiples: 1.8, three road drafting multiples: 1.4, curling number is 15/25mm, and line density is 5dtex, and moisture is 2%, and oil content is 1.0%, fracture: > 2.8cn/dtex, percentage elongation is 100%, and fibre length is 51mm.
Embodiment three:
A kind of super fine denier flame retardant polyurethane staple fibre take low density polyethylene (LDPE) as sea component, and make for island component with polyurethane, phosphorus flame retardant, wherein polyurethane, low density polyethylene (LDPE), phosphorus flame retardant mass ratio are: 1:0.8 ~ 1.2:0.2 ~ 0.5.
The preparation method of super fine denier flame retardant polyurethane staple fibre, comprises the steps:
(1) first by polyurethane chip drying, dryer is adopted to be divided into three steps to dry successively: temperature during first step prebake is 60 DEG C of drying times is 60min, second step bake out temperature is 80 DEG C, drying time is 60min, 3rd step bake out temperature is 90 DEG C, drying time is 60min, the stirring frequency of dryer is 30r/min, then the polyurethane of having dried section and phosphorus flame retardant are got to pre-mixer by automatic material-absorbing device mix according to quality proportioning 1:0.5, mixing time: 30min, stirring frequency: 60r/min;
(2) twin-screw sea-island-type composite spun method is adopted, the polyurethane of melting and phosphorus flame retardant are become through fabric of island-in-sea type spinning plate the low density polyethylene (LDPE) that multiply thread is melted in spinneret orifice porch wrap up respectively, extrude tow through cooling, oil, draw-off godet, boundling, oil bath drawing-off, curling, relaxation heat setting, super fine denier flame retardant polyurethane staple fibre obtained with cut-out, before the filter of the screw rod of melting polyurethane and phosphorus flame retardant, pressure is 80Pa, after filter, pressure is 75Pa, rotating speed is 30r/min, melt temperature is 295 DEG C, before the filter of the screw rod of described melting low density polyethylene (LDPE), pressure is 90Pa, after filter, pressure is 80Pa, rotating speed is 25r/min, melt temperature is 250 DEG C, cooling blower is adopted to extrude tow cooling, the chilling temperature of cooling blower is 28 DEG C, cooling blower wind speed is 28m/s, blast is 1000Pa, the mass concentration of finish of oiling is 3%, the mass concentration of oil bath drawing-off finish is 10%, the temperature of oil bath drawing-off is 60 DEG C, oil bath drawing-off is divided into three road drawing-offs, one drafting multiple: 1.5, two road drafting multiples 2.0, three road drafting multiples: 1.5, curling number is 18/25mm, and line density is 6dtex, and moisture is 1.5 ~ 3%, and oil content is 1.1%, fracture: > 2.8cn/dtex, percentage elongation is 120%, and fibre length is 52mm.
Claims (9)
1. a super fine denier flame retardant polyurethane staple fibre, it is characterized in that: described polyurethane staple fibre take low density polyethylene (LDPE) as sea component, make for island component with polyurethane, phosphorus flame retardant, wherein polyurethane, low density polyethylene (LDPE), phosphorus flame retardant mass ratio are: 1:0.8 ~ 1.2:0.2 ~ 0.5.
2. super fine denier flame retardant polyurethane staple fibre as claimed in claim 1, is characterized in that: described phosphorus flame retardant is formed by methyl phosphorus and the copolymerization of ring-type phosphorus.
3. the preparation method of super fine denier flame retardant polyurethane staple fibre as claimed in claim 1, is characterized in that: comprise the steps:
(1) first by polyurethane chip drying, dryer is adopted to be divided into three steps to dry successively: temperature during first step prebake is 50 ~ 60 DEG C of drying times is 30 ~ 60min, second step bake out temperature is 60 ~ 80 DEG C, drying time is 40 ~ 60min, 3rd step bake out temperature is 80 ~ 90 DEG C, drying time is 40 ~ 60min, the stirring frequency of dryer is 5 ~ 30r/min, then the polyurethane of having dried section and phosphorus flame retardant are got to pre-mixer by automatic material-absorbing device mix according to quality proportioning 1:0.2 ~ 0.5, mixing time is 15 ~ 30min, stirring frequency is 30 ~ 60r/min,
(2) adopt twin-screw sea-island-type composite spun method, by the polyurethane of melting and phosphorus flame retardant through fabric of island-in-sea type spinning plate become the low density polyethylene (LDPE) that multiply thread is melted in spinneret orifice porch wrap up respectively, extrude tow through cool, oiling, draw-off godet, boundling, oil bath drawing-off, curling, relaxation heat setting and cut off and obtain super fine denier flame retardant polyurethane staple fibre.
4. the preparation method of super fine denier flame retardant polyurethane staple fibre as claimed in claim 3, it is characterized in that: before the filter of the screw rod of described melting polyurethane and phosphorus flame retardant, pressure is 70 ~ 80Pa, after filter, pressure is 60 ~ 75Pa, and rotating speed is 20 ~ 30r/min, and melt temperature is 250 ~ 295 DEG C.
5. the preparation method of super fine denier flame retardant polyurethane staple fibre as claimed in claim 3, it is characterized in that: before the filter of the screw rod of described melting low density polyethylene (LDPE), pressure is 75 ~ 90Pa, after filter, pressure is 65 ~ 80Pa, and rotating speed is 15 ~ 25r/min, and melt temperature is 90 ~ 250 DEG C.
6. the preparation method of super fine denier flame retardant polyurethane staple fibre as claimed in claim 3, it is characterized in that: in described step (2), adopt cooling blower to extrude tow cooling, the chilling temperature of cooling blower is 18 ~ 28 DEG C, and cooling blower wind speed is 27 ~ 28m/s, and blast is 800 ~ 1000Pa.
7. the preparation method of super fine denier flame retardant polyurethane staple fibre as claimed in claim 3, is characterized in that: described in the mass concentration of finish that uses when oiling be 1 ~ 3%, the mass concentration of oil bath drawing-off finish is 5 ~ 10%, and the temperature of oil bath drawing-off is 40 ~ 60 DEG C.
8. the preparation method of super fine denier flame retardant polyurethane staple fibre as claimed in claim 3, is characterized in that: described oil bath drawing-off is divided into three road drawing-offs, one drafting multiple: 1.0 ~ 1.5; Two road drafting multiples: 1.5 ~ 2.0; Three road drafting multiples: 1.2 ~ 1.5.
9. the preparation method of super fine denier flame retardant polyurethane staple fibre as claimed in claim 3, it is characterized in that: described curling number is 13 ~ 18/25mm, line density is 3.5 ~ 6dtex, moisture is 1.5 ~ 3%, oil content is 0.6 ~ 1.1%, fracture: > 2.8cn/dtex, percentage elongation is 80 ~ 120%, and fibre length is 50 ~ 52mm.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107287677A (en) * | 2017-08-05 | 2017-10-24 | 合肥梵清电子商务有限公司 | A kind of preparation method of heat resistant spandex fiber |
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| CN1664188A (en) * | 2005-02-07 | 2005-09-07 | 无锡双象超纤材料股份有限公司 | Micro-polyurethane short fiber |
| WO2006070970A1 (en) * | 2004-12-31 | 2006-07-06 | Hyosung Corporation | Dope dyed flame retardant polyester fibers, textle products therefrom and the method of manufacturing thereof |
| CN101148786A (en) * | 2006-09-20 | 2008-03-26 | 东丽纤维研究所（中国）有限公司 | Flame-proof polyester ultra-thin fibre and producing method |
| CN102168321A (en) * | 2011-04-09 | 2011-08-31 | 禾欣可乐丽超纤皮(嘉兴)有限公司 | Sea-island type composite fiber manufacture method |
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- 2015-08-07 CN CN201510479924.9A patent/CN105063793A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2006070970A1 (en) * | 2004-12-31 | 2006-07-06 | Hyosung Corporation | Dope dyed flame retardant polyester fibers, textle products therefrom and the method of manufacturing thereof |
| CN1664188A (en) * | 2005-02-07 | 2005-09-07 | 无锡双象超纤材料股份有限公司 | Micro-polyurethane short fiber |
| CN101148786A (en) * | 2006-09-20 | 2008-03-26 | 东丽纤维研究所（中国）有限公司 | Flame-proof polyester ultra-thin fibre and producing method |
| CN102168321A (en) * | 2011-04-09 | 2011-08-31 | 禾欣可乐丽超纤皮(嘉兴)有限公司 | Sea-island type composite fiber manufacture method |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN107287677A (en) * | 2017-08-05 | 2017-10-24 | 合肥梵清电子商务有限公司 | A kind of preparation method of heat resistant spandex fiber |
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Application publication date: 20151118 |