CN111235686A - Composite ultrashort fiber and preparation method thereof - Google Patents
Composite ultrashort fiber and preparation method thereof Download PDFInfo
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- CN111235686A CN111235686A CN202010172757.4A CN202010172757A CN111235686A CN 111235686 A CN111235686 A CN 111235686A CN 202010172757 A CN202010172757 A CN 202010172757A CN 111235686 A CN111235686 A CN 111235686A
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- hdpe
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- composite
- maleic anhydride
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- D—TEXTILES; PAPER
- D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
- D01F—CHEMICAL FEATURES IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS; APPARATUS SPECIALLY ADAPTED FOR THE MANUFACTURE OF CARBON FILAMENTS
- D01F8/00—Conjugated, i.e. bi- or multicomponent, artificial filaments or the like; Manufacture thereof
- D01F8/04—Conjugated, i.e. bi- or multicomponent, artificial filaments or the like; Manufacture thereof from synthetic polymers
- D01F8/06—Conjugated, i.e. bi- or multicomponent, artificial filaments or the like; Manufacture thereof from synthetic polymers with at least one polyolefin as constituent
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
- C08F255/00—Macromolecular compounds obtained by polymerising monomers on to polymers of hydrocarbons as defined in group C08F10/00
- C08F255/02—Macromolecular compounds obtained by polymerising monomers on to polymers of hydrocarbons as defined in group C08F10/00 on to polymers of olefins having two or three carbon atoms
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G63/00—Macromolecular compounds obtained by reactions forming a carboxylic ester link in the main chain of the macromolecule
- C08G63/02—Polyesters derived from hydroxycarboxylic acids or from polycarboxylic acids and polyhydroxy compounds
- C08G63/12—Polyesters derived from hydroxycarboxylic acids or from polycarboxylic acids and polyhydroxy compounds derived from polycarboxylic acids and polyhydroxy compounds
- C08G63/16—Dicarboxylic acids and dihydroxy compounds
- C08G63/18—Dicarboxylic acids and dihydroxy compounds the acids or hydroxy compounds containing carbocyclic rings
- C08G63/181—Acids containing aromatic rings
- C08G63/183—Terephthalic acids
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G63/00—Macromolecular compounds obtained by reactions forming a carboxylic ester link in the main chain of the macromolecule
- C08G63/78—Preparation processes
- C08G63/82—Preparation processes characterised by the catalyst used
- C08G63/85—Germanium, tin, lead, arsenic, antimony, bismuth, titanium, zirconium, hafnium, vanadium, niobium, tantalum, or compounds thereof
-
- D—TEXTILES; PAPER
- D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
- D01D—MECHANICAL METHODS OR APPARATUS IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS
- D01D5/00—Formation of filaments, threads, or the like
- D01D5/28—Formation of filaments, threads, or the like while mixing different spinning solutions or melts during the spinning operation; Spinnerette packs therefor
- D01D5/30—Conjugate filaments; Spinnerette packs therefor
- D01D5/34—Core-skin structure; Spinnerette packs therefor
-
- D—TEXTILES; PAPER
- D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
- D01F—CHEMICAL FEATURES IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS; APPARATUS SPECIALLY ADAPTED FOR THE MANUFACTURE OF CARBON FILAMENTS
- D01F8/00—Conjugated, i.e. bi- or multicomponent, artificial filaments or the like; Manufacture thereof
- D01F8/04—Conjugated, i.e. bi- or multicomponent, artificial filaments or the like; Manufacture thereof from synthetic polymers
- D01F8/10—Conjugated, i.e. bi- or multicomponent, artificial filaments or the like; Manufacture thereof from synthetic polymers with at least one other macromolecular compound obtained by reactions only involving carbon-to-carbon unsaturated bonds as constituent
-
- D—TEXTILES; PAPER
- D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
- D01F—CHEMICAL FEATURES IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS; APPARATUS SPECIALLY ADAPTED FOR THE MANUFACTURE OF CARBON FILAMENTS
- D01F8/00—Conjugated, i.e. bi- or multicomponent, artificial filaments or the like; Manufacture thereof
- D01F8/04—Conjugated, i.e. bi- or multicomponent, artificial filaments or the like; Manufacture thereof from synthetic polymers
- D01F8/14—Conjugated, i.e. bi- or multicomponent, artificial filaments or the like; Manufacture thereof from synthetic polymers with at least one polyester as constituent
Landscapes
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Engineering & Computer Science (AREA)
- Textile Engineering (AREA)
- Health & Medical Sciences (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Organic Chemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Mechanical Engineering (AREA)
- Multicomponent Fibers (AREA)
Abstract
The invention discloses a composite ultrashort fiber, which is of a skin-core structure, wherein the skin layer is formed by mixing HDPE and modified HDPE, and the core layer is PET, and is characterized in that: the modified HDPE is a maleic anhydride grafted HDPE. And its preparing process are also disclosed. The invention uses maleic anhydride to graft HDPE, which can improve the cohesiveness of polyolefin resin and various base materials, improve the grafting rate of HDPE maleic anhydride, reduce the usage proportion of modified HDPE in the two-component composite ultrashort fiber, and further improve the bonding capability of the fiber. The invention adopts an online adding technology, and adopts methods of improving HDPE melt adhesive property and the like by adjusting a titanium catalyst polymerization process, so as to ensure that the skin layer has good adhesive property, and prepare the composite ultrashort fiber with higher tensile strength and adhesive property. The short fiber can improve the bonding performance between the fiber skin layer and the core layer, between the skin layer and wood pulp and between fibers, thereby improving the quality and reducing the cost.
Description
Technical Field
The invention relates to a sheath-core composite fiber, in particular to a composite ultrashort fiber, a preparation method thereof and application thereof in sanitary materials.
Background
When the dry method is used for producing the dust-free paper (non-woven fabric), the used material is wood pulp, only a small amount of ultra-short fibers are used to ensure that the wood pulp can be bonded into the paper, and the dust-free paper has certain mechanical property and soft hand feeling, has higher requirement on the ultra-short fibers, and requires that the fibers have higher tensile strength and bonding property.
Disclosure of Invention
In view of the above problems, the present invention provides a composite ultrashort fiber having high tensile strength and adhesive property.
In order to achieve the purpose, the invention adopts the technical scheme that: the utility model provides a compound ultrashort fibre, is skin core structure, and the cortex is that HDPE, modified HDPE mix and forms, and the sandwich layer is PET, its characterized in that: the modified HDPE is a maleic anhydride grafted HDPE.
Preferably, the proportion of the modified HDPE is 10-20% of the total amount of the HDPE component. The total amount of the components refers to modified HDPE and unmodified HDPE.
Preferably, the maleic anhydride grafted initiator is dicumyl peroxide, the content of the dicumyl peroxide is 0.3PPM, and the grafting rate of the maleic anhydride is 0.7-1.2 wt%.
Preferably, the HDPE has a density of 0.96g/cm3The flow rate is 17.0-23.0 g/min, and the melting point is 130-134 ℃.
The invention also discloses a preparation method of the composite ultrashort fiber, which comprises the following steps:
1) HDPE melt extrusion, and simultaneously HDPE, MAH monomer and initiator are fully mixed, then the mixture is added into a double-screw extruder for melt extrusion, and after filtration, the mixture is metered and converged into HDPE melt, and enters a spinning manifold A after being uniformly mixed;
2) blending purified terephthalic acid and ethylene glycol in proportion, adding a titanium catalyst, carrying out esterification reaction, sending an esterification reaction product into a pre-shrinking reaction kettle for carrying out pre-shrinking reaction, simultaneously adding the titanium catalyst on an oligomer pipeline by using an injector, sending a material subjected to the pre-shrinking reaction into a final polymerization kettle for carrying out final polycondensation reaction, and sending the final polycondensation product into a spinning box B after metering;
3) the two melts are sprayed out by a composite spinning assembly to form fibers with a sheath-core structure, the fibers are oiled after cooling and forming, and then the fibers are wound, stretched and cut off to prepare the composite ultrashort fibers.
Preferably, the melt extrusion temperature of the HDPE in the step 1) is 245-275 ℃, and the melt extrusion temperature of the mixture of the maleic anhydride and the HDPE is 280-290 ℃.
Preferably, in the step 2), the molar ratio of the purified terephthalic acid to the ethylene glycol is 1.1-1.5, the esterification reaction temperature is 260-270 ℃, and the relative pressure is 0.07 MPa; controlling the temperature of the material to be subjected to pre-polycondensation to be 265-275 ℃, and controlling the reaction pressure to be 10-30 Kpa; the temperature of the reaction material in the final polymerization kettle is 270-280 ℃, and the vacuum is not lower than 200 Pa; the titanium catalyst accounts for 4-6 PPM of the weight of the polyester, and the proportion of the titanium catalyst added in the esterification process and the polycondensation process is 3: 7 to 7.3.
Preferably, in step 3), the ratio of the two melt weights is HDPE: the PET is 60:40, the spinning forming temperature is 287-297 ℃, the cooling temperature is 33-37 ℃, the filament bundle cooling distance is 600-1000 mm, and the oiling and wetting rate is 24-32%.
The invention also discloses the application of the composite ultra-short fiber as a sanitary material.
Has the advantages that:
the invention uses maleic anhydride to graft HDPE, after the HDPE is grafted by maleic anhydride, the affinity with inorganic filler can be improved, the compatibility with incompatibility or poor compatibility can also be improved, the adhesive force with materials such as high polymers and the like can also be increased, the adhesive property of polyolefin resin and various base materials can be improved, the maleic anhydride grafting rate of HDPE can be improved, the usage amount proportion of modified HDPE in the two-component composite ultra-short fiber can be reduced, and the adhesive capacity of the fiber can be further improved. The invention adopts an online adding technology, and adopts methods of improving HDPE melt adhesive property and the like by adjusting a titanium catalyst polymerization process, so that the skin layer has good adhesive property, and meanwhile, the PET core material has certain strength, and the composite ultrashort fiber with higher tensile strength and adhesive property is prepared. The ultra-short fiber is applied with hot air in the process of being mixed with wood pulp into a net, so that the bonding performance between the fiber skin layer and the core layer, between the skin layer and the wood pulp and between fibers can be improved, and the cost is reduced while the quality is improved.
Detailed Description
Examples 1 to 3
The preparation method of the composite ultrashort fiber comprises the following steps:
1) HDPE melt extrusion, and simultaneously HDPE, MAH monomer and initiator are fully mixed, then the mixture is added into a double-screw extruder for melt extrusion, and after filtration, the mixture is metered and converged into HDPE melt, and enters a spinning manifold A after being uniformly mixed;
2) blending purified terephthalic acid and ethylene glycol in proportion, adding a titanium catalyst, carrying out esterification reaction, sending an esterification reaction product into a pre-shrinking reaction kettle for carrying out pre-shrinking reaction, simultaneously adding the titanium catalyst on an oligomer pipeline by using an injector, sending a material subjected to the pre-shrinking reaction into a final polymerization kettle for carrying out final polycondensation reaction, and sending the final polycondensation product into a spinning box B after metering;
3) the two melts are sprayed out by a composite spinning assembly to form fibers with a sheath-core structure, the fibers are oiled after being cooled and formed, and then the fibers are wound, stretched and cut off to prepare the composite ultra-short fibers.
The performance of the prepared composite ultra-short fiber is detected according to the national standard, and the result is shown in table 1.
TABLE 1 parameters and test parameters for examples 1-3
Dust free paper test
Commercially available ultrashort fibers and the ultrashort fibers obtained in example 1 were added to wood pulp, and the same process steps were used to prepare dust-free paper, and the obtained dust-free paper was examined, and the results are shown in table 2.
TABLE 2 dust free paper test results
Claims (9)
1. The utility model provides a compound ultrashort fibre, is skin core structure, and the cortex is that HDPE, modified HDPE mix and forms, and the sandwich layer is PET, its characterized in that: the modified HDPE is a maleic anhydride grafted HDPE.
2. The composite ultrashort fiber of claim 1, wherein: the proportion of the modified HDPE is 10-20% of the total amount of the HDPE components.
3. The composite ultrashort fiber of claim 1 or 2, wherein: the maleic anhydride grafted initiator is dicumyl peroxide, the content of the dicumyl peroxide is 0.3PPM, and the grafting rate of the maleic anhydride is 0.7-1.2 wt%.
4. The composite ultrashort fiber of claim 3, wherein: the HDPE density is 0.96g/cm3The flow rate is 17.0-23.0 g/min, and the melting point is 130-134 ℃.
5. The method for preparing composite ultrashort fiber as claimed in any one of claims 1 to 4, comprising the steps of:
1) HDPE melt extrusion, and simultaneously HDPE, MAH monomer and initiator are fully mixed, then the mixture is added into a double-screw extruder for melt extrusion, and after filtration, the mixture is metered and converged into HDPE melt, and enters a spinning manifold A after being uniformly mixed;
2) blending purified terephthalic acid and ethylene glycol in proportion, adding a titanium catalyst, carrying out esterification reaction, sending an esterification reaction product into a pre-shrinking reaction kettle for carrying out pre-shrinking reaction, simultaneously adding the titanium catalyst on an oligomer pipeline by using an injector, sending a material subjected to the pre-shrinking reaction into a final polymerization kettle for carrying out final polycondensation reaction, and sending the final polycondensation product into a spinning box B after metering;
3) the two melts are sprayed out by a composite spinning assembly to form fibers with a sheath-core structure, the fibers are oiled after being cooled and formed, and then the fibers are wound, stretched and cut off to prepare the composite ultra-short fibers.
6. The method of preparing composite ultrashort fiber as claimed in claim 5, wherein: in the step 1), the melt extrusion temperature of HDPE is 245-275 ℃, and the melt extrusion temperature of the mixture of maleic anhydride and HDPE is 280-290 ℃.
7. The method of preparing composite ultrashort fiber as claimed in claim 6, wherein: in the step 2), the molar ratio of the purified terephthalic acid to the ethylene glycol is 1.1-1.5, the esterification reaction temperature is 260-270 ℃, and the relative pressure is 0.07 MPa; controlling the temperature of the material to be subjected to pre-polycondensation to be 265-275 ℃, and controlling the reaction pressure to be 10-30 Kpa; the temperature of the reaction material in the final polymerization kettle is 270-280 ℃, and the vacuum is not lower than 200 Pa; the titanium catalyst accounts for 40-60 PPM of the weight of the polyester, and the proportion of the titanium catalyst added in the esterification process and the polycondensation process is 3: 7 to 7.3.
8. The method of preparing composite ultrashort fiber as claimed in claim 7, wherein: in the step 3), the weight ratio of the two melts is HDPE: the PET is 60:40, the spinning forming temperature is 287-297 ℃, the cooling temperature is 33-37 ℃, the filament bundle cooling distance is 600-1000 mm, and the oiling and wetting rate is 24-32%.
9. Use of the composite ultrashort fiber of any one of claims 1 to 4 as a hygiene material.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202010172757.4A CN111235686A (en) | 2020-03-12 | 2020-03-12 | Composite ultrashort fiber and preparation method thereof |
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| CN202010172757.4A CN111235686A (en) | 2020-03-12 | 2020-03-12 | Composite ultrashort fiber and preparation method thereof |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111979600A (en) * | 2020-08-22 | 2020-11-24 | 江苏江南高纤股份有限公司 | Electret composite short fiber and preparation method thereof |
| CN114318586A (en) * | 2022-01-07 | 2022-04-12 | 广东秋盛资源股份有限公司 | Composite fiber material, preparation method and needle-punched non-woven fabric |
| CN115368547A (en) * | 2022-07-29 | 2022-11-22 | 浙江恒创先进功能纤维创新中心有限公司 | Industrialized application of titanium catalyst in three-kettle polyester device |
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| CN1259178A (en) * | 1997-04-08 | 2000-07-05 | 菲伯维森斯公司 | Cellulose-binding fibres |
| CN108716027A (en) * | 2018-08-31 | 2018-10-30 | 江苏江南高纤股份有限公司 | The preparation method of the compound superbhort fibers of PE-PET, using and rear spinning system |
| CN109234846A (en) * | 2018-10-11 | 2019-01-18 | 江苏江南高纤股份有限公司 | The preparation method of Kang Shu composite short fiber |
| CN109930237A (en) * | 2017-12-19 | 2019-06-25 | 东丽纤维研究所（中国）有限公司 | A kind of core sheath composite fibre |
-
2020
- 2020-03-12 CN CN202010172757.4A patent/CN111235686A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1259178A (en) * | 1997-04-08 | 2000-07-05 | 菲伯维森斯公司 | Cellulose-binding fibres |
| CN109930237A (en) * | 2017-12-19 | 2019-06-25 | 东丽纤维研究所（中国）有限公司 | A kind of core sheath composite fibre |
| CN108716027A (en) * | 2018-08-31 | 2018-10-30 | 江苏江南高纤股份有限公司 | The preparation method of the compound superbhort fibers of PE-PET, using and rear spinning system |
| CN109234846A (en) * | 2018-10-11 | 2019-01-18 | 江苏江南高纤股份有限公司 | The preparation method of Kang Shu composite short fiber |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111979600A (en) * | 2020-08-22 | 2020-11-24 | 江苏江南高纤股份有限公司 | Electret composite short fiber and preparation method thereof |
| CN114318586A (en) * | 2022-01-07 | 2022-04-12 | 广东秋盛资源股份有限公司 | Composite fiber material, preparation method and needle-punched non-woven fabric |
| CN114318586B (en) * | 2022-01-07 | 2023-12-01 | 广东秋盛资源股份有限公司 | Composite fiber material, preparation method and needled non-woven fabric |
| CN115368547A (en) * | 2022-07-29 | 2022-11-22 | 浙江恒创先进功能纤维创新中心有限公司 | Industrialized application of titanium catalyst in three-kettle polyester device |
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