CN102965759A - High-simulation cotton modified cellulose ester/ polyester sheath-core composite fiber and preparation method thereof - Google Patents
High-simulation cotton modified cellulose ester/ polyester sheath-core composite fiber and preparation method thereof Download PDFInfo
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- CN102965759A CN102965759A CN2012104717531A CN201210471753A CN102965759A CN 102965759 A CN102965759 A CN 102965759A CN 2012104717531 A CN2012104717531 A CN 2012104717531A CN 201210471753 A CN201210471753 A CN 201210471753A CN 102965759 A CN102965759 A CN 102965759A
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Abstract
The invention relates to a high-simulation cotton modified cellulose ester/ polyester sheath-core composite fiber, wherein the component of a core is polyester, and the component of a sheath is modified cellulose ester. The invention also discloses a preparation method of high-simulation cotton modified cellulose ester/ polyester sheath-core composite fiber, which comprises the following steps: using a double-component composite spinning machine to carry out melt spinning on the cellulose ester and the polyester which are treated by vacuum drying; preparing cellulose acetate/ polyester composite fiber with a sheath-core structure; after that, heating and carrying out alkali treatment to hydrolyze the ester group in the cellulose ester and reduce a great number of hydroxide radicals; and finally, preparing the high-simulation cotton modified cellulose ester/ polyester sheath-core composite fiber. Compared with the conventional polyester fiber, the modified cellulose ester/ polyester sheath-core composite fiber has the excellent performances of polyester and cotton at the same time; and fabrics developed by the composite fiber has the advantages of being low in cost, easy to dye, good in hand feeling, hygroscopicity, blending as well as stiff and smooth properties, etc.
Description
Technical field
The present invention relates to a kind of high imitative cotton polyester fiber and preparation method thereof, particularly a kind of imitative cotton modified cellulose ester/polyester complex fiber of height with skin-core structure and preparation method thereof.
Background technology
Polyester is the most widely one of macromolecular material of whole world consumption maximum, purposes, relies on its superior performance, has been widely used in the fields such as textile fabric, packaging material and film medium.The exploitation of initial polyester fiber is still compared with cotton take imitative cotton as the basis, and the sucting wet air permeability of polyester is still relatively poor, and dyeability is not good.Generally speaking, polyester can only adopt disperse dyes to dye under the condition of High Temperature High Pressure, then often adopts two-step method dyeing during with polyester and cotton fiber blending, and this has just caused the complexity of its dyeing, and cost also can correspondingly increase.On the other hand, although cotton fiber has good moisture absorption and gas permeability, soft, warming, dyeability is excellent, but as a kind of natural crop, its resource-constrained, price are subject to the impact of the factors such as weather, output easily, and cost is relatively high, and its product can not carry out melt-processed mainly take staple fibre as main.Although viscose and cotton fiber performance approach, it can only adopt wet spinning machine-shaping, and production process can cause serious pollution, is unfavorable for sustainable development.
Up to now, the research of high imitative cotton polyester fiber reports that not yet to some extent enterprise mainly concentrates on the aspects such as dyeability that polyester is carried out the preparation of modification, polyester complex fiber and improves polyester for the research of polyester both at home and abroad.For example: China Patent Publication No. CN102276814A, open day is on December 14th, 2011, name is called atmospheric cation dyeable polyester and production method and purposes, a kind of atmospheric cation dyeable polyester and production method and purposes are disclosed, adopt the titanium sub-group compound of non-toxic, environmental friendly as catalyst, resulting polyester has that fusing point is high, heat endurance is high, the characteristic of good spinnability, by the fabric of its manufacturing preferably dyeability is arranged, and has dyeability under ordinary pressure.CN1948610, open day is on 04 18th, 2007, name is called a kind of low temperature plasma terylene dyeing method, discloses a kind of low temperature plasma terylene dyeing method.Step comprises (1) low temperature plasma to the dacron physical modification, adopts the pulse of air atmospheric plasma to process dacron or pulse low pressure plasma processing dacron; (2) use cationic dyeing; The method dyeing cleaning, quick, pollution-free, cost is low.China Patent Publication No. CN1912199A, open day is on February 14th, 2007, name is called the double component polyester core-skin composite fiber and production method discloses a kind of two-component polyester sheath core compound fibre and production method, product core composition is that content of titanium dioxide is the super full-dull polyester of 5-10%, and the skin composition is the polyester of cationic dye capable of dyeing.Because skin composition of the present invention adopts the polyester of cationic-dyeable, dyeability and the color emissivity of fabric have improved greatly, and content of titanium dioxide is high in the polyester in addition, and the barrier property of fiber is remarkable, and the fabulous fiber of barrier property can be used to make the fabric of swimming suit.China Patent Publication No. CN101613894A, open day is on December 30th, 2009, name is called the preparation method who discloses a kind of dyeable polyester composite fiber of cationic dye among the preparation method of dyeable polyester composite fiber of cationic dye, comprises the steps: the preparation of (1) modified poly ester raw material: comprise the preparation of sandwich layer component and cortex component; (2) preparation of polyester complex fiber: two kinds of cationic dye capable of dyeing Modified polyester chips that utilize said method to make, carry out respectively crystallizing and drying, screw rod melt extruded, measure, enter the eccentric composite spining module of core-skin by the compound ratio of cortex and the weight of sandwich layer, and cortex encases sandwich layer fully, makes the dyeable polyester composite fiber of cationic dye of three-dimensional crimp through subsequent technique.
In sum, although a lot of research is devoted to improve the performance of polyester, all do not break away from this main body of polyester, be subjected to the impact of polyester molecule structure, its moisture absorption poisture-penetrability and dyeability still can be subject to certain limitation.
Summary of the invention
For above-mentioned existing problems, the object of the present invention is to provide a kind of imitative cotton modified cellulose ester/polyester sheath core compound fibre of cotton height with the dual excellent properties of polyester that has concurrently.Cellulose esters is considered to the biodegradable macromolecular material of a kind of up-and-coming thermoplasticity, behind its process heating and the alkali treatment modifying, hydrolysis of ester group also discharges certain hydroxyl, give its high imitative woolliness energy, cellulose esters/polyester sheath core compound fibre glossiness increase, dyeability are carried, simultaneously fabric size stiffness, the enhancing of overhanging property.Therefore, the exploitation of high imitative cotton modified cellulose ester/polyester sheath core compound fibre is to promoting market and the using value of polyester, and satisfying hugely, the polyester application market has great importance.
To achieve these goals, technical solution of the present invention is as follows:
A kind of high imitative cotton modified cellulose ester/polyester sheath core compound fibre, it is characterized in that: the structure of described composite fibre is skin-core structure, and wherein the skin composition is modified cellulose ester, and the core composition is polyester, according to mass percent:
Cellulose esters 10-30%,
Polyester 70-90%.
Described cellulose esters is a kind of in cellulose acetate-butyrate, the cellulose acetate propionate ester.
Described polyester is a kind of in polyethylene terephthalate or polytrimethylene terephthalate or the polybutylene terephthalate.
A kind of preparation method of high imitative cotton modified cellulose ester/polyester sheath core compound fibre, described preparation method's concrete steps are as follows:
A will be by weight percentage for the cellulose esters of 10-30% and mass percent are that the polyester of 70-90% utilizes respectively vacuum drying oven to carry out drying, make the water content of cellulose esters and polyester respectively less than 50ppm;
B passes through respectively the first component screw extruder and the melting of second component screw extruder with dried cellulose esters and polyester, through being depressed into filament spinning component after the measuring pump metering, two kinds of raw materials carry out spraying by composite spinneret after compound in filament spinning component, make cellulose esters become the skin composition of composite fibre, polyester becomes the core composition of composite fibre;
C prepares cellulose esters/polyester sheath core compound fibre with the spinning speed coiling and molding with 1000-3000m/min after air-cooled of the cellulose esters/polyester sheath core compound fibre by spinnerets ejection;
D utilizes cellulose esters/polyester sheath core compound fibre the NaOH solution-treated 20-60min of 50-200g/L under 60-100 ℃ condition, cellulose esters is carried out modification, make the hydrolysis of ester group in the cellulose esters and restore certain hydroxyl, obtain high imitative cotton modified cellulose ester/polyester sheath core compound fibre.
Owing to adopted above technical scheme, the present invention has following innovative point:
(1) cellulose esters is the biodegradable macromolecular material of a kind of thermoplasticity, the present invention adopts cellulose esters and polyester to carry out melt spinning method, preparation cellulose esters/polyester sheath core compound fibre, product can be the fiber of long filament, short silk or other odd-shaped cross sections, having overcome conventional cotton fiber can not melt-processed, can only lead to spinning process and polyester fiber and carry out compound this drawback;
(2) the present invention utilizes NaOH solution that cellulose esters/polyester sheath core compound fibre is processed, and makes as hydrolysis of ester group in the cellulose esters of skin composition and discharges certain hydroxyl, gives modified cellulose ester high imitative woolliness energy.
With normal polyester Fiber Phase ratio, utilize the present invention to prepare the high imitative cotton modified cellulose ester/polyester sheath core compound fibre of gained and possess following performance:
(1) good moisture absorption poisture-penetrability, comfortableness;
(2) can utilize any dyestuff that is applicable to cotton to dye at normal temperatures and pressures, even dyeing, dye-uptake height.During with itself and cotton fiber blending, can finish dyeing by one-step method, shortened process reduces cost;
(3) fiber surface contains great amount of hydroxy group, makes the corresponding raising of glossiness, stiffness of composite fibre;
(4) cellulose esters in the composite fibre of the present invention can make by the esterification of renewable cellulosic material, a kind of " green resource ", because whole world petroleum resources are in short supply, minimizing is to the dependence of petroleum resources, and replacing non-renewable petroleum base material with reproducible natural resources is very useful for the sustainable development of society.In addition, cellulose esters is degradation material, with the high imitative cotton polyester of preparation behind itself and the polyester blend, also can promote the degraded of polyester, reduces the pollution to environment.
The specific embodiment
The present invention will be further described below in conjunction with example.
Embodiment 1
Utilize respectively vacuum drying oven to carry out drying the polyethylene terephthalate of 10kg cellulose acetate-butyrate and 90kg, make the water content of cellulose esters and polyester respectively less than 50ppm; Dried cellulose esters and polyester are passed through respectively the first component screw extruder and the melting of second component screw extruder, the Temperature Setting in each district of extruder is respectively between 200-260 ℃, 220-280 ℃, then through being depressed into filament spinning component after the measuring pump metering, two kinds of raw materials carry out spraying by composite spinneret after compound in filament spinning component, make cellulose esters become the skin composition of composite fibre, polyester becomes the core composition of composite fibre; With the spinning speed coiling and molding with 1000m/min after air-cooled of the cellulose esters/polyester sheath core compound fibre by spinnerets ejection, prepare cellulose esters/polyester sheath core compound fibre; With this composite fibre under 100 ℃ of conditions through the NaOH of 50g/l solution-treated 60min, obtain high imitative cotton modified cellulose ester/polyester sheath core compound fibre.
Present embodiment fiber physical property index: fiber number 3.3dtex, intensity 3.53CN/dtex, elongation 15.7%, dye-uptake is 32.8%, regain 3.4%.
Embodiment 2
Utilize respectively vacuum drying oven to carry out drying the polytrimethylene terephthalate of 20kg cellulose acetate-butyrate and 80kg, make the water content of cellulose esters and polyester respectively less than 50ppm; Dried cellulose esters and polyester are passed through respectively the first component screw extruder and the melting of second component screw extruder, the Temperature Setting in each district of extruder is respectively between 200-260 ℃, 220-260 ℃, then through being depressed into filament spinning component after the measuring pump metering, two kinds of raw materials carry out spraying by composite spinneret after compound in filament spinning component, make cellulose esters become the skin composition of composite fibre, polyester becomes the core composition of composite fibre; With the spinning speed coiling and molding with 2000m/min after air-cooled of the cellulose esters/polyester sheath core compound fibre by spinnerets ejection, prepare cellulose esters/polyester sheath core compound fibre; With this composite fibre under 80 ℃ of conditions through the NaOH of 100g/l solution-treated 40min, obtain high imitative cotton modified cellulose ester/polyester sheath core compound fibre.
Present embodiment fiber physical property index: fiber number 3.0dtex, intensity 3.43CN/dtex, elongation 16.3%, dye-uptake is 36.9%, regain 4.3%.
Embodiment 3
Utilize respectively vacuum drying oven to carry out drying the polybutylene terephthalate of 30kg cellulose acetate-butyrate and 70kg, make the water content of cellulose esters and polyester respectively less than 50ppm; Dried cellulose esters and polyester are passed through respectively the first component screw extruder and the melting of second component screw extruder, the Temperature Setting in each district of extruder is respectively between 200-260 ℃, 220-260 ℃, then through being depressed into filament spinning component after the measuring pump metering, two kinds of raw materials carry out spraying by composite spinneret after compound in filament spinning component, make cellulose esters become the skin composition of composite fibre, polyester becomes the core composition of composite fibre; With the spinning speed coiling and molding with 3000m/min after air-cooled of the cellulose esters/polyester sheath core compound fibre by spinnerets ejection, prepare cellulose esters/polyester sheath core compound fibre; With this composite fibre under 60 ℃ of conditions through the NaOH of 200g/l solution-treated 20min, obtain high imitative cotton modified cellulose ester/polyester sheath core compound fibre, its dye-uptake is 20%, regain is 3%, fiber number is 3.3dtex.
Present embodiment fiber physical property index: fiber number 2.84dtex, intensity 3.28CN/dtex, elongation 15.4%, dye-uptake is 40.6%, regain 4.5%.
Embodiment 4
The polyethylene terephthalate of 10kg cellulose acetate propionate ester and 80kg utilizes respectively vacuum drying oven to carry out drying, makes the water content of cellulose esters and polyester respectively less than 50ppm; Dried cellulose esters and polyester are passed through respectively the first component screw extruder and the melting of second component screw extruder, the Temperature Setting in each district of extruder is respectively between 200-260 ℃, 240-280 ℃, then through being depressed into filament spinning component after the measuring pump metering, two kinds of raw materials carry out spraying by composite spinneret after compound in filament spinning component, make cellulose esters become the skin composition of composite fibre, polyester becomes the core composition of composite fibre; With the spinning speed coiling and molding with 1000m/min after air-cooled of the cellulose esters/polyester sheath core compound fibre by spinnerets ejection, prepare cellulose esters/polyester sheath core compound fibre; With this composite fibre under 100 ℃ of conditions through the NaOH of 50g/l solution-treated 60min, obtain high imitative cotton modified cellulose ester/polyester sheath core compound fibre.
Present embodiment fiber physical property index: fiber number 3.3dtex, intensity 3.33CN/dtex, elongation 15.7%, dye-uptake is 31.9%, regain 3.5%.
Embodiment 5
Utilize respectively vacuum drying oven to carry out drying the polytrimethylene terephthalate of 20kg cellulose acetate propionate ester and 80kg, make the water content of cellulose esters and polyester respectively less than 50ppm; Dried cellulose esters and polyester are passed through respectively the first component screw extruder and the melting of second component screw extruder, the Temperature Setting in each district of extruder is respectively between 200-260 ℃, 220-260 ℃, then through being depressed into filament spinning component after the measuring pump metering, two kinds of raw materials carry out spraying by composite spinneret after compound in filament spinning component, make cellulose esters become the skin composition of composite fibre, polyester becomes the core composition of composite fibre; With the spinning speed coiling and molding with 2000m/min after air-cooled of the cellulose esters/polyester sheath core compound fibre by spinnerets ejection, prepare cellulose esters/polyester sheath core compound fibre; With this composite fibre under 80 ℃ of conditions through the NaOH of 100g/l solution-treated 40min, obtain high imitative cotton modified cellulose ester/polyester sheath core compound fibre.
Present embodiment fiber physical property index: fiber number 3.0dtex, intensity 3.14CN/dtex, elongation 16.2%, dye-uptake is 35.5%, regain 4.1%.
Embodiment 6
Utilize respectively vacuum drying oven to carry out drying the polybutylene terephthalate of 30kg cellulose acetate propionate ester and 70kg, make the water content of cellulose esters and polyester respectively less than 50ppm; Dried cellulose esters and polyester are passed through respectively the first component screw extruder and the melting of second component screw extruder, the Temperature Setting in each district of extruder is respectively between 200-260 ℃, 220-260 ℃, then through being depressed into filament spinning component after the measuring pump metering, two kinds of raw materials carry out spraying by composite spinneret after compound in filament spinning component, make cellulose esters become the skin composition of composite fibre, polyester becomes the core composition of composite fibre; With the spinning speed coiling and molding with 3000m/min after air-cooled of the cellulose esters/polyester sheath core compound fibre by spinnerets ejection, prepare cellulose esters/polyester sheath core compound fibre; With this composite fibre under 60 ℃ of conditions through the NaOH of 200g/l solution-treated 20min, obtain high imitative cotton modified cellulose ester/polyester sheath core compound fibre.
Present embodiment fiber physical property index: fiber number 2.8dtex, intensity 3.08CN/dtex, elongation 15.5%, dye-uptake is 38.2%, regain 4.4%.
Claims (4)
1. one kind high imitative cotton modified cellulose ester/polyester sheath core compound fibre, it is characterized in that: the structure of described composite fibre is skin-core structure, and wherein the skin composition is modified cellulose ester, and the core composition is polyester, according to mass percent:
Cellulose esters 10-30%
Polyester 70-90%.
2. described a kind of high imitative cotton modified cellulose ester/polyester sheath core compound fibre according to claim 1 is characterized in that: described cellulose esters is a kind of in cellulose acetate-butyrate, the cellulose acetate propionate ester.
3. described a kind of high imitative cotton modified cellulose ester/polyester sheath core compound fibre according to claim 1 is characterized in that: described polyester is a kind of in polyethylene terephthalate or polytrimethylene terephthalate or the polybutylene terephthalate.
4. the preparation method of a high imitative cotton modified cellulose ester/polyester sheath core compound fibre, described preparation method's concrete steps are as follows:
A will be by weight percentage for the cellulose esters of 10-30% and mass percent are that the polyester of 70-90% utilizes respectively vacuum drying oven to carry out drying, make the water content of cellulose esters and polyester respectively less than 50ppm;
B passes through respectively the first component screw extruder and the melting of second component screw extruder with dried cellulose esters and polyester, through being depressed into filament spinning component after the measuring pump metering, two kinds of raw materials carry out spraying by composite spinneret after compound in filament spinning component, make cellulose esters become the skin composition of composite fibre, polyester becomes the core composition of composite fibre;
C prepares cellulose esters/polyester sheath core compound fibre with the spinning speed coiling and molding with 1000-3000m/min after air-cooled of the cellulose esters/polyester sheath core compound fibre by spinnerets ejection;
D utilizes cellulose esters/polyester sheath core compound fibre the NaOH solution-treated 20-60min of 50-200g/L under 60-100 ℃ condition, cellulose esters is carried out modification, make the hydrolysis of ester group in the cellulose esters and restore certain hydroxyl, obtain high imitative cotton modified cellulose ester/polyester sheath core compound fibre.
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| CN103352266A (en) * | 2013-06-19 | 2013-10-16 | 东华大学 | Preparation method for cellulose and thermoplastic polymer skin-core type composite fiber |
| CN103352267A (en) * | 2013-06-19 | 2013-10-16 | 东华大学 | Preparation method for new type fully-degradable cellulose composite fiber with skin-core structures |
| CN106894108A (en) * | 2017-02-17 | 2017-06-27 | 武汉纺织大学 | Core-skin composite fiber of nanofiber surface and preparation method thereof |
| CN108374210A (en) * | 2018-02-07 | 2018-08-07 | 武汉纺织大学 | The preparation method of super imitative cotton long filament |
| CN109440222A (en) * | 2018-10-23 | 2019-03-08 | 盐城工学院 | Method of fire resistance fibre and products thereof is prepared after a kind of cellulose/polyester two-component skin-core structure oxidation |
| CN111379039A (en) * | 2018-12-30 | 2020-07-07 | 苏州龙杰特种纤维股份有限公司 | Environment-friendly multipurpose bionic fiber production process |
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Application publication date: 20130313 |