CN101445968A - Processing method for alkali resistance of polyester fiber - Google Patents
Processing method for alkali resistance of polyester fiber Download PDFInfo
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- CN101445968A CN101445968A CNA2008101366486A CN200810136648A CN101445968A CN 101445968 A CN101445968 A CN 101445968A CN A2008101366486 A CNA2008101366486 A CN A2008101366486A CN 200810136648 A CN200810136648 A CN 200810136648A CN 101445968 A CN101445968 A CN 101445968A
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- polyester fiber
- polyester
- alkali resistance
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Abstract
The invention discloses a processing method for alkali resistance of polyester fiber, comprising the steps as follows: polyester fiber monofilaments which are extruded by a spinneret and have the humidity at 500-560 DEG C are processed by swiftly passing through a reaction kettle at 400-480 DEG C; the reaction kettle is equipped with powder spraying holes; polypropylene powder with the size being smaller than 100nm is sprayed into the reaction kettle through the powder spraying holes and forms dust cloud in the chamber; the dust cloud directly touches polyester synthetic monofilament fiber, melts the polyester synthetic monofilament fiber down and integrates the polyester synthetic monofilament fiber and the polyester fiber, thus forming the modified polyester fiber with alkali resistance. The invention has the advantages that as the polypropylene material has good alkali resistance, the ultra-thin polypropylene and the polyester fiber which are melted and deposited on the modified polyester synthetic monofilament fiber and firmly fused with the modified polyester synthetic monofilament fiber directly touch alkaline matter without suffering form alkaline corrosion. Therefore, the modified polyester fiber produced by the modifying technology maintains various excellent properties such as high strength and high elasticity modulus of the core polyester fiber, good ageing resistance and the like, and the property of good alkali resistance for the modified polyester fiber which directly touches the actuating medium after the fiber is modified.
Description
Technical field
The present invention relates to a kind of processing method for alkali resistance of polyester fiber, especially a kind of processing method for alkali resistance of polyester fiber.
Background technology
Since the seventies in 20th century, American-European countries is by discovering, can effectively prevent the warm draw seam of bituminous concrete with polyester fiber, thereby effectively improve the tension of bituminous paving, shearing resistance, resistance to compression, impact strength and fatigue performance, after this polyester fiber begins to be used in a large number bituminous concrete, but because the polyester fiber alkali resistance is poor, its alkaline-resisting strength retention ratio low (having only about 30% usually), so can not be used in the stronger portland cement concrete of alkalescence, only can be with the high polypropylene fibre of alkaline-resisting strength retention ratio in portland cement concrete, polyethylene eyeball fiber and polyamide fiber etc., though these materials can play action of crack arrest to cement concrete to a certain extent, but because its intensity and elastic modelling quantity are lower, effect undesirable (can only reach 85% usually) is split in resistance, it is reported abroad in order to improve construction quality, have to adopt polyester fiber to strengthen the alkali-free cement concrete,, the concrete works cost is very restricted because the alkali-free cement price is several times of ordinary cement.So only there is polyester fiber to be used for the report of bituminous concrete in the literature, do not see that polyester fiber is used for the report of portland cement concrete engineering (seeing novelty assessment report annex 1-16) polyester fiber and has the intensity height, the elastic modelling quantity height, ageing-resistant advantage, if can solve its alkaline-resisting problem, will be to improving cement concrete strength, anti-bending strength and fatigue life than other synthetic fiber more remarkable effect, for high quality water cement concrete engineering, also will reduce engineering cost greatly compared with polyester fiber alkali-free cement concrete.
Summary of the invention
The object of the present invention is to provide a kind of processing method for alkali resistance of polyester fiber, this method can solve the alkali-proof problem of polyester fiber.
Technical scheme of the present invention is: a kind of processing method for alkali resistance of polyester fiber, the humidity that spinning head is extruded is quick by the reactor of a temperature at 400 ℃-480 ℃ at 500-560 ℃ polyester fiber monofilament, powder injection hole is arranged on the reactor, spray into size less than the polypropylene powder of 100 nanometers and in the chamber, form dust cloud by powder injection hole, those dust clouds contact directly that polyester synthetic filaments fiber will further melt and the combining of formation and polyester fiber, thereby form the alkali resistant modified polyester fiber.
The invention has the advantages that: because polypropylene material has good alkali resistance,, the ultra-thin polypropylene that is deposited over modified poly ester synthetic filaments fiber and realizes firmly fusion with it avoids alkaline attack so directly contacting with alkaline matter with polyester fiber, therefore the modified polyester fiber of this modification technology manufacturing had both kept the high-strength high-elasticity modulus of core polyester fiber and good many premium properties such as ageing resistace, had increased the good alkali resistance that directly contacts modified polyester fiber with working media after the modification again.
The alkaline resistance test of carrying out shows: promptly soak after 6 hours in the 2% concentration aqueous slkali under 80 ℃ of temperature under standard test condition, modified polyester fiber monofilament through the present technique processing, its fastness to alkali retention rate is all above 95%, and the control group polyester fiber monofilament of handling without present technique, its fastness to alkali retention rate only has about 30%.
Description of drawings
Accompanying drawing is a process chart of the present invention.
The specific embodiment
A kind of processing method for alkali resistance of polyester fiber, the humidity that spinning head is extruded is quick by the reactor of a temperature at 450 ℃ at 550 ℃ polyester fiber monofilament, powder injection hole is arranged on the reactor, spray into size less than the polypropylene powder of 100 nanometers and in the chamber, form dust cloud by powder injection hole, those dust clouds contact directly that polyester synthetic filaments fiber will further melt and the combining of formation and polyester fiber, thereby form the alkali resistant modified polyester fiber.Its technology path is.
Claims (1)
1, a kind of processing method for alkali resistance of polyester fiber, it is characterized in that: the humidity that spinning head is extruded is quick by the reactor of a temperature at 400 ℃-480 ℃ at 500-560 ℃ polyester fiber monofilament, powder injection hole is arranged on the reactor, spray into size less than the polypropylene powder of 100 nanometers and in the chamber, form dust cloud by powder injection hole, those dust clouds contact directly that polyester synthetic filaments fiber will further melt and the combining of formation and polyester fiber, thereby form the alkali resistant modified polyester fiber.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2008101366486A CN101445968A (en) | 2008-12-30 | 2008-12-30 | Processing method for alkali resistance of polyester fiber |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2008101366486A CN101445968A (en) | 2008-12-30 | 2008-12-30 | Processing method for alkali resistance of polyester fiber |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101445968A true CN101445968A (en) | 2009-06-03 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNA2008101366486A Pending CN101445968A (en) | 2008-12-30 | 2008-12-30 | Processing method for alkali resistance of polyester fiber |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101445968A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101736417B (en) * | 2009-11-25 | 2012-01-25 | 彭书成 | Preparation method of modified polyester fiber and modified polyester fiber prepared by same |
-
2008
- 2008-12-30 CN CNA2008101366486A patent/CN101445968A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101736417B (en) * | 2009-11-25 | 2012-01-25 | 彭书成 | Preparation method of modified polyester fiber and modified polyester fiber prepared by same |
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| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Open date: 20090603 |