CN1174129C - Polypropylene fiber and preparation thereof - Google Patents
Polypropylene fiber and preparation thereof Download PDFInfo
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- CN1174129C CN1174129C CNB008024685A CN00802468A CN1174129C CN 1174129 C CN1174129 C CN 1174129C CN B008024685 A CNB008024685 A CN B008024685A CN 00802468 A CN00802468 A CN 00802468A CN 1174129 C CN1174129 C CN 1174129C
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- 239000000835 fiber Substances 0.000 title claims abstract description 91
- -1 Polypropylene Polymers 0.000 title claims abstract description 42
- 239000004743 Polypropylene Substances 0.000 title claims abstract description 42
- 229920001155 polypropylene Polymers 0.000 title claims abstract description 42
- 238000002360 preparation method Methods 0.000 title description 4
- 238000002074 melt spinning Methods 0.000 claims abstract description 12
- 229920005629 polypropylene homopolymer Polymers 0.000 claims abstract description 12
- 238000000034 method Methods 0.000 claims description 19
- 238000000113 differential scanning calorimetry Methods 0.000 claims description 18
- 238000009987 spinning Methods 0.000 claims description 18
- 229920000642 polymer Polymers 0.000 claims description 9
- 239000000155 melt Substances 0.000 claims description 8
- 239000003963 antioxidant agent Substances 0.000 claims description 7
- 230000003078 antioxidant effect Effects 0.000 claims description 7
- 239000003381 stabilizer Substances 0.000 claims description 7
- 230000004927 fusion Effects 0.000 claims description 5
- 238000009960 carding Methods 0.000 abstract description 9
- 239000004745 nonwoven fabric Substances 0.000 abstract description 3
- 239000004744 fabric Substances 0.000 description 48
- 230000000704 physical effect Effects 0.000 description 10
- 238000001816 cooling Methods 0.000 description 9
- 238000004519 manufacturing process Methods 0.000 description 9
- 239000000463 material Substances 0.000 description 8
- 238000005516 engineering process Methods 0.000 description 6
- 238000013461 design Methods 0.000 description 5
- 230000015572 biosynthetic process Effects 0.000 description 4
- 238000001035 drying Methods 0.000 description 4
- 206010013786 Dry skin Diseases 0.000 description 3
- 239000000654 additive Substances 0.000 description 3
- 229920000098 polyolefin Polymers 0.000 description 3
- 238000012545 processing Methods 0.000 description 3
- OBETXYAYXDNJHR-SSDOTTSWSA-M (2r)-2-ethylhexanoate Chemical compound CCCC[C@@H](CC)C([O-])=O OBETXYAYXDNJHR-SSDOTTSWSA-M 0.000 description 2
- 241000196324 Embryophyta Species 0.000 description 2
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- IMNFDUFMRHMDMM-UHFFFAOYSA-N N-Heptane Chemical compound CCCCCCC IMNFDUFMRHMDMM-UHFFFAOYSA-N 0.000 description 2
- 241000209094 Oryza Species 0.000 description 2
- 235000007164 Oryza sativa Nutrition 0.000 description 2
- 210000002659 acromion Anatomy 0.000 description 2
- OBETXYAYXDNJHR-UHFFFAOYSA-N alpha-ethylcaproic acid Natural products CCCCC(CC)C(O)=O OBETXYAYXDNJHR-UHFFFAOYSA-N 0.000 description 2
- 238000003490 calendering Methods 0.000 description 2
- 150000007942 carboxylates Chemical class 0.000 description 2
- 239000003795 chemical substances by application Substances 0.000 description 2
- 238000004040 coloring Methods 0.000 description 2
- GHVNFZFCNZKVNT-UHFFFAOYSA-N decanoic acid Chemical compound CCCCCCCCCC(O)=O GHVNFZFCNZKVNT-UHFFFAOYSA-N 0.000 description 2
- 238000000605 extraction Methods 0.000 description 2
- 238000002844 melting Methods 0.000 description 2
- 230000008018 melting Effects 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 239000004033 plastic Substances 0.000 description 2
- 229920003023 plastic Polymers 0.000 description 2
- 235000009566 rice Nutrition 0.000 description 2
- 238000006467 substitution reaction Methods 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- 239000004753 textile Substances 0.000 description 2
- 238000005406 washing Methods 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 description 1
- 239000005632 Capric acid (CAS 334-48-5) Substances 0.000 description 1
- 229920000433 Lyocell Polymers 0.000 description 1
- 241001274660 Modulus Species 0.000 description 1
- 230000000996 additive effect Effects 0.000 description 1
- 238000007605 air drying Methods 0.000 description 1
- 159000000009 barium salts Chemical class 0.000 description 1
- 229910052791 calcium Inorganic materials 0.000 description 1
- 239000011575 calcium Substances 0.000 description 1
- CJZGTCYPCWQAJB-UHFFFAOYSA-L calcium stearate Chemical compound [Ca+2].CCCCCCCCCCCCCCCCCC([O-])=O.CCCCCCCCCCCCCCCCCC([O-])=O CJZGTCYPCWQAJB-UHFFFAOYSA-L 0.000 description 1
- 235000013539 calcium stearate Nutrition 0.000 description 1
- 239000008116 calcium stearate Substances 0.000 description 1
- 229910017052 cobalt Inorganic materials 0.000 description 1
- 239000010941 cobalt Substances 0.000 description 1
- GUTLYIVDDKVIGB-UHFFFAOYSA-N cobalt atom Chemical compound [Co] GUTLYIVDDKVIGB-UHFFFAOYSA-N 0.000 description 1
- 230000000052 comparative effect Effects 0.000 description 1
- 238000002788 crimping Methods 0.000 description 1
- 238000002425 crystallisation Methods 0.000 description 1
- 230000008025 crystallization Effects 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 230000018044 dehydration Effects 0.000 description 1
- 238000006297 dehydration reaction Methods 0.000 description 1
- POULHZVOKOAJMA-UHFFFAOYSA-N dodecanoic acid Chemical compound CCCCCCCCCCCC(O)=O POULHZVOKOAJMA-UHFFFAOYSA-N 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 238000013213 extrapolation Methods 0.000 description 1
- 239000002657 fibrous material Substances 0.000 description 1
- 230000004907 flux Effects 0.000 description 1
- 238000009998 heat setting Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000007731 hot pressing Methods 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 238000005304 joining Methods 0.000 description 1
- 238000004900 laundering Methods 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 150000002815 nickel Chemical class 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 230000003252 repetitive effect Effects 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
- 238000010792 warming Methods 0.000 description 1
- 239000002759 woven fabric Substances 0.000 description 1
Images
Classifications
-
- 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
- D01F6/00—Monocomponent artificial filaments or the like of synthetic polymers; Manufacture thereof
- D01F6/02—Monocomponent artificial filaments or the like of synthetic polymers; Manufacture thereof from homopolymers obtained by reactions only involving carbon-to-carbon unsaturated bonds
- D01F6/04—Monocomponent artificial filaments or the like of synthetic polymers; Manufacture thereof from homopolymers obtained by reactions only involving carbon-to-carbon unsaturated bonds from polyolefins
- D01F6/06—Monocomponent artificial filaments or the like of synthetic polymers; Manufacture thereof from homopolymers obtained by reactions only involving carbon-to-carbon unsaturated bonds from polyolefins from polypropylene
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- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Textile Engineering (AREA)
- Artificial Filaments (AREA)
- Nonwoven Fabrics (AREA)
Abstract
Disclosed is a polypropylene fiber, which is obtained from an isotactic polypropylene homopolymer with an isotactic index of 90 to 99 % through melt-spinning or through drawing after melt-spinning, and shows two differential scanning calorimeter (DSC) endothermic peaks between 155 and 170 DEG C. When being thermally bonded with one another, the fibers are made into non-woven fabrics which have excellent strength in addition to being soft. A high quality of the non-woven fabrics can be produced in high speed carding machines with high yields.
Description
The background of invention
FIELD OF THE INVENTION
Generally speaking, the present invention relates to polypropylene fibre, or rather, relate to and can be used as the polypropylene fibre that supatex fabric is used, make supatex fabric smooth and have outstanding intensity thus, and in the processing of back, can be supatex fabric machinability and physical property are provided.The present invention also relates to the manufacture method of this fiber.
The description of prior art
In order to prepare staple fibre with polyolefin polymer, they must carry out a series of processing: usually polyolefin polymer is mixed with a certain amount of additive, with common production technology the mixture that forms is melt extruded, make fiber, with fiber crimp and be cut into predetermined length.
When being used to make supatex fabric, the polyolefin staple fibre is generally processed to form nonwoven web on carding machine, then carries out heat bonding.
Usually adopt a pair of calender, sonicated or hot-air to carry out heat bonding.
Especially for polypropylene filament or staple fibre, after shredding and combing, arrange and combine the formation net.These nets carry out heat bonding by means of the calender of band rhombus or triangle pattern, make the supatex fabric that can be applicable to multiple industrial circle.In addition, also can adopt hot-air to replace calender.If the employing hot-air, after combing, it is bonding to utilize the hot-air that circulates in the porous drum to carry out, and forms supatex fabric so.
The polypropylene nonwoven fabric has multiple use, can be used for diaper, sanitary towel, mouth mask and medical textile that disposable diaper, uracratia patients are used.Do not require the intensity so high as woven fabric though be used for the supatex fabric of these purposes, they must be soft, and satisfy the requirement to skin safe, because they directly contact skin.
The intensity of supatex fabric depends on their manufacturing technique, also is decided by the physical property of fibrous material.
In order to boost productivity, speed of production will improve usually in the manufacturer of supatex fabric.But the physical property of the fiber that high production speed requirement supatex fabric is used is more outstanding.
The general introduction of invention
In order to solve the problems referred to above that run in the prior art, the inventor has carried out extensive repetitive research to polypropylene yarn or the staple fibre that is applicable to supatex fabric, caused the present invention, result of study is found, record the isotactic polypropylene homopolymers of two endothermic peaks by differential scanning calorimetry (DSC), can be made into the tencel that prior art is not reported so far, and guarantee that the supatex fabric of being made by this fiber has outstanding intensity and pliability.In addition, by control melt index (MI) and polydispersity index in the per pass operation of whole technology, can obtain the fiber of this structure.
Therefore, an object of the present invention is to provide the polypropylene fibre that supatex fabric is used, this fiber can be used in the high speed carding machine, and guarantees that the supatex fabric after the heat bonding has outstanding intensity and pliability.
Another object of the present invention provides the manufacture method of this polypropylene fibre.
Another purpose of the present invention provides the supatex fabric of being made by this polypropylene fibre.
According to the embodiment of the present invention, provide a kind of like this polypropylene fibre, it is that the isotactic polypropylene homopolymers of 90-99% obtains by stretching after melt spinning or the melt spinning by isotactic index.And between 155-170 ℃, two differential scanning calorimetrics (DSC) endothermic peak appears.
According to another implementation of the invention, provide the method for the described polypropylene fibre of preparation, this method comprises the steps:
(a) the fusion isotactic index is 90-99%, melt index (MI) (MI
a) be 10.0-40.0, preferred 10.0-25.0 and polydispersity index (PI
a) be 2.5-6.0, preferred 2.8-5.0, the more preferably isotactic polypropylene homopolymers of 3.5-4.3, the melt index (MI) of the molten polymer of formation is (MI
b), MI
b/ MI
aRatio be 1.01-1.50, polydispersity index (PI
b) compare PI
aNarrow 10% or below;
(b), make the melt index (MI) (MI of fiber with the molten polymer spinning
c) be 16.5-80.0, polydispersity index (PI
c) be 2.1-5.7, MI
c/ MI
aRatio be 1.65-7.50;
(c) optional with tensile fiber.
Brief description of drawings
Also will more clearly understand above-mentioned and other purposes, feature and other advantages of the present invention in conjunction with the accompanying drawings from following detailed description.
Fig. 1 is a dsc endothermic curve, and polypropylene homo fibres wherein of the present invention has two endothermic peaks that significantly recorded by DSC;
Fig. 2 is a dsc endothermic curve, and two tangible endothermic peaks are wherein arranged, and second peak is the acromion at first peak;
Fig. 3 is a dsc endothermic curve, and wherein conventional polypropylene homo fibres only shows a DSC endothermic peak.
Detailed description of the invention
The present invention relates to by isotactic index be the polypropylene homopolymer of 90-99% by melt spinning or melt spinning and the polypropylene fibre that stretches and make, it shows two means of differential scanning calorimetries (DSC) endothermic peak between 155-170 ℃. Polypropylene fibre of the present invention preferably shows the first endothermic peak at 160 ± 3 ℃, shows the second endothermic peak at 165 ± 3 ℃.
When making supatex fabric by polypropylene fibre of the present invention by heat bonding, above-mentioned physical property is so that supatex fabric is both smooth and have outstanding intensity. This advantage be since between roller because very fast again crystallization when again solidifying, occurs in heat or hot pressing function and the fiber of heat fusing in the high-melting-point district.
Material for the manufacture of fiber of the present invention is that isotactic index is the polypropylene homopolymer of 90-99%.
Melt index (MI) (the MI of polypropylene fibre of the present inventionc) be 16.5-80.0, be preferably the MI of isotactic polypropylene materiala1.65-7.50 doubly.
Polydispersity index (the PI of polypropylene fibre of the present inventionc) be 2.1-5.7, preferred 3.5-4.3 is than the PI of isotactic polypropylene materialaNarrow by 20%.
The preferred fineness of polypropylene fibre of the present invention is the 1.0-80.0 dawn.
Melt index (MI) (the MI that is used for isotactic polypropylene of the present inventiona) preferred 10-40, polydispersity index (PIa) preferred 2.5-6.0.
When polypropylene during melting, is preferably allocated stabilizing agent or the antioxidant of the consumption of 0.03-2.0% (weight) in extruder, preferred 0.03-0.7% (weight), more preferably 0.03-0.4% (weight).
Except stabilizing agent or antioxidant, also can prepare fiber of the present invention with carboxylate of the common additives in the industry such as deoxidier, colouring agent, metal etc. Can be used for the nickel salt that metal carboxylate of the present invention is selected from 2 ethyl hexanoic acid, sad, capric acid and dodecylic acid, the iron of 2 ethyl hexanoic acid, cobalt, calcium and barium salt and composition thereof. As deoxidier or colouring agent, can select the common calcium stearate that in petrochemical plant, is used for preparing polypropylene homopolymer. Can be used for multiple additives of the present invention can be with reference to european patent application № 279,511.
As mentioned above, the melt index (MI) MI that is used for isotactic polypropylene of the present invention
aPreferred 10-40.For example, work as MI
aBe lower than at 10 o'clock, spinning head pressure can increase during spinning, causes productivity ratio to descend.The heat that this polyacrylic melt spinning needs is just big, and energy consumption is increased.In addition, the fibre strength that obtains under this high heat condition increases, and makes them not be suitable for the supatex fabric of requirement smoothness.On the other hand, as the MI of isotactic polypropylene
aBe higher than at 40 o'clock, the intensity of the fiber of formation is not suitable for supatex fabric.In addition, spinning causes the fusion between the adjacent fiber after regular meeting's cooling is not thorough.
Should be noted that fiber of the present invention comprises the fiber that makes through fusion, spinning, curing and coiling operation, also comprise through the stretching process after the melt spinning, and the fiber that must make through curling operation, HEAT SETTING and cutting short-forming fiber.Through MI, the PI of the fiber of melt spinning and DSC endothermic peak and further stretched fiber much at one.
Prepare in the embodiment of polypropylene filament or staple fibre in the present invention, polymeric material is fusion in extruder, and the molten polymer of formation has MI
b/ MI
aFor the melt index (MI) of 1.01-1.50 is MI
b, polydispersity index PI
bCompare PI
aNarrow by 10%, more preferably narrow 5%.PI
bBe preferably 2.4-5.0.
For example, if MI
bSurpass MI
a1.5 times, polyacrylic strand will rupture, and makes it can not keep its original intensity.In addition, this fracture can cause strand to be orientated required viscosity deficiency at spinneret orifice, can not keep being suitable for the pressure of spinning.In addition, the fibre strength that obtains like this is poor, uses the feel of the supatex fabric that this fiber makes coarse, causes force of labor to descend.When extruding, polyacrylic MI increases 1% or greater than 1% naturally.Work as MI
bFade to and be lower than MI
a1.01 times the time, can the preparation fiber technology in run into very big difficulty.Especially the pressure that high viscosity can increase spinning head occurs at the spinneret orifice place, make spinning process very unstable.Therefore, productive rate can reduce, and fiber quality can seriously descend.
By the cooling condition after the control spinning, changed the second time of the polymer generation MI that experience MI changes in extruding operation.The temperature that postpones the cooling zone, atmosphere, temperature, speed and the cold gas flux of refrigerating gas are depended in MI variation in the cooling step.United States Patent (USP) № 4,193,961 has described and use to have postponed cooling and cooling air, also can be with reference to other documents, and Society of Plastics Engineers for example, " polypropylene fibre-science and technology " of the M.Ahmed that Inc. supports.
Preparation in accordance with the present invention, preferred control is through the melt index (MI) (MI of the fiber of refrigerating work procedure
c) be polymeric material melt index (MI) (MI
a) 1.65-7.50 doubly, polydispersity index PI
cPI than polymeric material
aNarrow 20% or following (that is 0.80PI,
aOr it is wideer).The PI of fiber
cBe 2.1-5.7, preferred 2.3-4.5, more preferably 3.0-4.0.
Work as MI
cWhen exceeding above-mentioned scope, the intensity decreases of raw yarn.The machinability of making supatex fabric with raw yarn is just poor, because supatex fabric pollutes card clothing easily, and partial melting is on calender.In detail, if MI
cDepart from higher limit, the molecular weight and molecular weight of yarn is too big, and the cooling effect that spins behind the silk from spinneret orifice also descends, and can produce between the yarn and merge.Even make yarn, and be used for making supatex fabric, in shredding and combing operation, also need more energy, influence manufacturing technique.In addition, the hot-short weak part of poor quality's yarn can melt when calendering, stains the calender surface of working in the last heat bonding of supatex fabric.
On the other hand, if MI
cExceed lower limit, the intensity of raw yarn can improve so, but is difficult to the heat bonding index of this raw yarn (below be called " TBI ") is brought up to desired degree.That is, the TBI of the supatex fabric that obtains is low, and feel is coarse.Though can improve the intensity or the TBI of supatex fabric by the temperature that increases calender or heat bonding district, supatex fabric is still very coarse.
When making supatex fabric, their machine-direction oriented and transverse strength is put with row with the carding machine kind and different.If these machines are made by different manufacturers, so, the vertical and horizontal intensity difference of the supatex fabric of process carding machine.Even on the carding machine that same manufacturer makes, supatex fabric also along with the shape of card clothing and material and arbitrarily roller existence and show different physical properties.In addition, according to the needs of back processing, the design weight difference of supatex fabric.The supatex fabric intensity level that records is only represented toughness, and each company characterizes all different to volume unit.Therefore, because situation good and bad between them can take place to distinguish, so only can not determine with intensity whether the physical property of supatex fabric is improved.Yet, though put may be different for the kind of carding machine or row, can be with reference to the bondability index of the supatex fabric of making, come the influence of the structure of comparison yarns or staple fibre and inherent physical property to supatex fabric.
Therefore, determining that accurately it is very suitable that the notion of TBI is considered in the influence of physical property to supatex fabric of yarn or staple fibre.Describe TBI in detail in " polypropylene fibre and textiles " article of in the 4th international conference that plastics and rubber association hold, reporting.Really, the present invention has quoted TBI and has come to determine relatively the influence of the physical property of yarn or staple fibre to supatex fabric as the most useful parameter.
Available TBI be 2.0 or higher fiber of the present invention make the good supatex fabric of pliability.
The present invention may be better understood by following embodiment, and they are to be used for illustrating of the present invention, can not be interpreted as restriction the present invention.
In the following embodiments, the fiber of the present invention's proposition and the physical property of supatex fabric have been analyzed.
The DSC endothermic peak: fully the washing the fibre sample is to remove finish.After air drying 30 minutes, the 2-4 millimeters long is cut in sample vacuumize in vacuum plant (decicater) after 1 hour.5 milligrams of samples that are cut into are put into the measurement dish, then use Perkin Elmer 7 series of heat analyzers to carry out heat and analyze, be warming up to 190 ℃ with 5 ℃ of/minute clock rate from 30 ℃, to obtain endothermic curve.Other conditions of this test are according to ASTM 3418-82 method.Conventional polypropylene homo fibres shows single endothermic peak, and fiber of the present invention has two endothermic peaks, as shown in drawings.Fig. 1 has shown the obvious DSC endothermic peak of two of fiber of the present invention, and second DSC endothermic peak appears in Fig. 2 on the acromion of first endothermic peak.Fig. 3 is the conventional fibre endothermic curve, only demonstrates a DSC endothermic peak.
The dawn number of yarn and staple fibre: the Vibroskop that uses Lenzing to make measures.
The intensity of yarn and staple fibre and percentage elongation: the Vibrodyn that uses Lenzing to make, press ASTM D638 and measure.
Melt index (MI) (MI): use the MP993 type instrument of Tinius Olsen, press ASTM D1238 and measure.Measure MI and must wash fiber sample with massive laundering, centrifugal dehydration, 105 ℃ of dryings are 15 minutes in baking oven, and are cut into 1 centimeter length.
Polydispersity index (PI): use RMS-800 (dish, the parallel-plate) type of U.S. Rheometrics, under 10% strained condition, measure Gc in 200 ℃ with the shear rate of 0.1-100, and the substitution following formula:
Wherein Gc is the modulus of the crossing point in storage modulu (G ') and 2-6 the frequency place of loss modulus (G ＂) in 5-250 hertz frequency scope.When joining not occurring, Gc is determined by extrapolation.
Isotactic index (I.I.): the polypropylene homo matter sample is cut into 5 millimeters long, wash with water, and in baking oven 105 ℃ of dryings 1 hour.Take out about 5 grams, accurately weigh then, a part of drying sample boiled in heptane about 5 hours, extracted.After extraction finishes, the abundant washing sample of water, 105 ℃ of dryings are 1 hour in baking oven, then weigh.With before the extraction and after the weight substitution following formula that records, obtain isotactic index.
The heat bonding index (TBI) of supatex fabric: calculate according to following formula:
Wherein MD is longitudinal strength (kilogram/50 millimeters), and CD is transverse strength (kilogram/50 millimeters), and design weight is the weight of supatex fabric unit are.
The intensity of supatex fabric: use Instron to test the sample of 50 mm wides and 140 millimeters long with the draw speed of 100 mm/min.
Pliability: the classification of feel: 1: very coarse; 2: coarse; 3: general; 4: softness; 5: very soft.
Embodiment 1-7 and Comparative Examples 1-7
Isotactic index be 97 and MI be the isotactic polypropylene homopolymers that contains 0.09% (weight) antioxidant and stabilizing agent shown in the table 1, melt spinning in temperature is 250-290 ℃ extruder, utilize heat medium the heating to the spinning head scope to be controlled in the 285-310 ℃ of scope simultaneously, make melt have the MIb shown in the table 1 from extruder.MI for the melt before raw material relatively and the spinning head just in the gear pump front that is used for the constant melt is fed spinning head, is provided with a branch road, with at pressure hour sample thief.
Then, melt is extruded from spinnerets with 1500 meters/minute spinning speed, and through protecting the hot-zone to postpone cooling, cooling forms the spun yarn at 2.4 dawn again, and its MIc, PIc and DSC endothermic peak are as shown in table 1.
The spun yarn that obtains is like this collected bunchy, and stretch, in crimping machine, curl, be cut into the staple fibre of 40 millimeters long then with 1.5 times draw ratio.
Table 2 has provided MI, PI, fibre strength, crispation number and the DSC endothermic peak of gained staple fibre.
In order to make supatex fabric, require staple fibre is administered on the carding machine according to manufacturer.The top roll that is used for making supatex fabric is an argyle design, and the sealing area reaches 22%, and calender is 147 ℃, 95 kg/cm
2Pressure operation calendering down.
The design weight of the supatex fabric that obtains, longitudinal strength and transverse strength, TBI and pliability are as shown in table 3.
Table 1
| The embodiment numbering | Material | Melt | Fiber | MI b/MI a | MI c/MI a | |||
| MI a | PI a | MI b | PI b | MI c | PI c | |||
| 1 | 17.2 | 4.1 | 18.2 | 3.9 | 52.0 | 3.8 | 1.1 | 3.0 |
| 2 | 22 | 3.2 | 23.0 | 3.1 | 56.0 | 2.9 | 1.0 | 2.5 |
| 3 | 12.2 | 5.5 | 18.0 | 5.1 | 57.0 | 4.5 | 1.5 | 4.7 |
| 4 | 12.2 | 6.0 | 17.0 | 5.5 | 36.5 | 4.9 | 1.4 | 3.0 |
| 5 | 13.2 | 4.3 | 15.0 | 3.9 | 45.0 | 3.6 | 1.1 | 3.4 |
| 6 | 11.0 | 3.8 | 14.6 | 3.6 | 46.0 | 3.5 | 1.3 | 4.2 |
| 7 | 11.0 | 5.8 | 13.6 | 5.6 | 31.2 | 4.9 | 1.2 | 2.8 |
| C1 | 12.2 | 2.4 | 17.0 | 2.3 | 24.3 | 2.2 | 1.4 | 2.0 |
| C2 | 17.1 | 10.8 | 29.2 | 9.5 | 106.5 | 6.5 | 1.7 | 6.2 |
| C3 | 3.9 | 6.5 | 5.6 | 6.4 | 32.5 | 5.1 | 1.4 | 8.3 |
| C4 | 12.2 | 5.5 | 15.4 | 4.9 | 80.2 | 4.7 | 1.3 | 6.6 |
| C5 | 8.1 | 5.6 | 11.6 | 5.1 | 28.0 | 4.2 | 1.4 | 3.5 |
| C6 | 10.8 | 12.0 | 19.1 | 11.0 | 39.5 | 10.2 | 1.8 | 3.7 |
| C7 | 42.5 | 5.9 | 62.4 | 5.7 | 698.0 | 5.1 | 1.5 | 4.7 |
Table 1 is continuous
| The embodiment numbering | ｛1-(PI b/PI a)} ×100(％) | {1-(PI c/PI a)} ×100(％) | The DSC endothermic peak of spun yarn (℃) | |
| 1′ | 2′ | |||
| 1 | 4.9 | 7.3 | 159.6 | 164.2 |
| 2 | 3.1 | 9.4 | 160.2 | 164.5 |
| 3 | 7.3 | 18.2 | 159.8 | 165.2 |
| 4 | 8.3 | 18.3 | 158.9 | 164.8 |
| 5 | 9.3 | 16.3 | 160.1 | 163.9 |
| 6 | 5.3 | 7.9 | 160.0 | 166.2 |
| 7 | 3.4 | 15.5 | 159.5 | 164.2 |
| C1 | 4.2 | 8.3 | 159.8 | - |
| C2 | 12.0 | 39.8 | 160.2 | - |
| C3 | 1.5 | 21.5 | 160.2 | - |
| C4 | 10.9 | 14.5 | 159.2 | - |
| C5 | 8.9 | 25.0 | 160.0 | - |
| C6 | 8.3 | 15.0 | 159.9 | - |
| C7 | 8.4 | 13.6 | 159.8 | - |
Table 2
| The embodiment numbering | MIc | PIc | Fibre strength (gram/dawn) | Crispation number | The DSC endothermic peak of staple fibre (℃) | |||
| The fiber that spinning forms | The staple fibre of spinning after-drawing | The fiber that spinning forms | The staple fibre of spinning after-drawing | 1′ | 2′ | |||
| 1 | 52.0 | 51.0 | 3.8 | 3.7 | 1.9 | 7.7 | 159.4 | 164.2 |
| 2 | 56.0 | 55.0 | 2.9 | 2.8 | 2.2 | 6.2 | 160.1 | 164.5 |
| 3 | 57.0 | 57.6 | 4.5 | 4.5 | 2.3 | 6.4 | 159.7 | 165.8 |
| 4 | 36.5 | 36.9 | 4.9 | 5.0 | 1.9 | 6.4 | 158.9 | 165.1 |
| 5 | 45.0 | 44.0 | 3.6 | 3.8 | 2.4 | 7.2 | 160.2 | 164.1 |
| 6 | 46.0 | 47.3 | 3.5 | 3.4 | 2.2 | 6.2 | 159.8 | 165.8 |
| 7 | 31.2 | 33.0 | 4.9 | 4.8 | 2.6 | 5.9 | 159.9 | 163.7 |
| C1 | 24.3 | 24.3 | 2.2 | 2.3 | 2.2 | 7.5 | 160.1 | - |
| C2 | 106.5 | 104.2 | 6.5 | 6.5 | 1.7 | 7.6 | 160.2 | - |
| C3 | 32.3 | 33.6 | 5.1 | 5.2 | 2.2 | 6.5 | 160.3 | - |
| C4 | 80.2 | 81.2 | 4.7 | 4.9 | 1.9 | 8.1 | 160.4 | - |
| C5 | 28.0 | 29.3 | 4.2 | 4.3 | 2.1 | 6.9 | 160.1 | - |
| C6 | 39.6 | 41.2 | 10.2 | 10.3 | 1.6 | 7.2 | 160.2 | - |
| C7 | 201.0 | 197.0 | 5.1 | 5.2 | 1.7 | 6.5 | 160.1 | - |
Table 3
| The embodiment numbering | Combing | Intensity (kilogram/5 centimetres) | TBI | Pliability | Note | |||
| Machine | Speed (rice/minute) | Design weight (gram/rice 2) | MD | CD | ||||
| 1 | THIBEAU | 180 | 21.0 | 5.3 | 1.4 | 2.6 | 5 | - |
| 2 | SPINNBAU | 175 | 19.0 | 5.2 | 1.2 | 2.6 | 4 | - |
| 3 | SPINNBAU | 100 | 19.5 | 7.2 | 2.6 | 4.4 | 5 | - |
| 4 | SPINNBAU | 210 | 17.8 | 6.2 | 1.5 | 3.4 | 4 | - |
| 5 | HERGETH | 95 | 20.1 | 4.9 | 1.8 | 3.0 | 5 | - |
| 6 | HERGETH | 95 | 22.1 | 6.8 | 1.8 | 3.2 | 4 | - |
| 7 | HERGETH | 180 | 20.3 | 3.9 | 1.4 | 2.3 | 4 | - |
| C1 | SPINNBAU | 100 | 20.2 | 3.2 | 0.9 | 1.7 | 1 | Coarse |
| C2 | HERGETH | 150 | 21.0 | 3.5 | 0.8 | 1.6 | 3 | TBI descends |
| C3 | SPINNBAU | 150 | 20.3 | 3.4 | 0.9 | 1.7 | 1 | TBI descends |
| C4 | SPINNBAU | 160 | 20.4 | 3.5 | 1.0 | 1.8 | 2 | TBI descends |
| C5 | SPINNBAU | 100 | 19.8 | 3.8 | 0.9 | 1.9 | 2 | Coarse |
| C6 | SPINNBAU | 105 | 18.9 | 3.9 | 0.8 | 1.9 | 2 | Coarse |
| C7 | SPINNBAU | 90 | 19.5 | 3.8 | 0.9 | 1.9 | 3 | Difficulty, NEP is many |
From the foregoing description as seen, the supatex fabric with the isotactic polypropylene homopolymer fibre heat bonding that two DSC endothermic peaks are arranged of the present invention is made except softness, also shows outstanding intensity.Also can on the high speed carding machine, make supatex fabric.Thus, the present invention can high yield make the high-quality supatex fabric.
More than in illustrative mode the present invention has been described, should be understood that the technology words and phrases of use are illustrative, rather than the restriction the present invention.According to above-mentioned technology, can carry out multiple modification and variation.Therefore, should be understood that within the scope of the appended claims, also can implement the present invention in the mode different with described concrete mode.
Claims (17)
1. polypropylene fibre, it is that the isotactic polypropylene homopolymers of 90-99% obtains by stretching after melt spinning or the melt spinning by isotactic index, it shows two endothermic peaks that recorded by differential scanning calorimetry between 155-170 ℃.
2. second endothermic peak when polypropylene fibre as claimed in claim 1, the endothermic peak that wherein said two differential scanning calorimetries record comprise first endothermic peak when appearing at 160 ± 3 ℃ and appear at 165 ± 3 ℃.
3. polypropylene fibre as claimed in claim 1, the melt index (MI) MI of wherein said fiber
cBe 16.5-80.0.
4. polypropylene fibre as claimed in claim 1, the polydispersity index PI of wherein said fiber
cBe 2.1-5.7.
5. polypropylene fibre as claimed in claim 1, the fineness of wherein said fiber are 1.0-80.0 dawn/monofilament.
6. polypropylene fibre as claimed in claim 4, the PI of wherein said fiber
cBe 2.3-4.5.
7. polypropylene fibre as claimed in claim 1, it also contains stabilizing agent and/or the antioxidant of 0.03-2.0 weight %.
8. polypropylene fibre as claimed in claim 7, the content of wherein said stabilizing agent and/or antioxidant are 0.03-0.7 weight %.
9. polypropylene fibre as claimed in claim 8, the content of wherein said stabilizing agent and/or antioxidant are 0.03-0.4 weight %.
10. method for preparing polypropylene fibre, it comprises the steps:
(a) the fusion isotactic index is 90-99%, melt index (MI) MI
aBe 10.0-40.0 and polydispersity index PI
aBe the isotactic polypropylene homopolymers of 2.5-6.0, form molten polymer, this molten polymer melt index (MI) is MI
b, MI
b/ MI
aRatio be 1.01-1.50, polydispersity index PI
bCompare PI
aNarrow 10% or below;
(b), make the melt index (MI) MI of fiber with the molten polymer spinning
cBe 16.5-80.0, polydispersity index PI
cBe 2.1-5.7, MI
c/ MI
aRatio be 1.65-7.50;
(c) randomly with tensile fiber.
11. method as claimed in claim 10, wherein in described step (a), described polypropylene homopolymer contains 0.03-2.0 weight % stabilizing agent and/or antioxidant.
12. method as claimed in claim 10, wherein said MI
aBe 10-30.
13. method as claimed in claim 10, wherein said PI
aBe 2.8-5.0.
14. method as claimed in claim 13, wherein said PI
aBe 3.5-4.3.
15. method as claimed in claim 10, the fineness of wherein said fiber are 1.0-80.0 dawn/monofilament.
16. method as claimed in claim 10, wherein said MI
bBe 10.1-41.0.
17. method as claimed in claim 10, the PI of wherein said fiber
cBe 2.3-4.5.
Applications Claiming Priority (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR10-1999-0049610A KR100401246B1 (en) | 1999-11-10 | 1999-11-10 | Preparation of polyolefin fiber |
| KR1999/49610 | 1999-11-10 | ||
| KR10-2000-0013319A KR100401248B1 (en) | 2000-03-16 | 2000-03-16 | Polypropylene fiber and preparation thereof |
| KR2000/13319 | 2000-03-16 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1335901A CN1335901A (en) | 2002-02-13 |
| CN1174129C true CN1174129C (en) | 2004-11-03 |
Family
ID=26636302
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB008024685A Expired - Lifetime CN1174129C (en) | 1999-11-10 | 2000-11-07 | Polypropylene fiber and preparation thereof |
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| Country | Link |
|---|---|
| EP (1) | EP1234065B1 (en) |
| CN (1) | CN1174129C (en) |
| AU (1) | AU768809B2 (en) |
| BR (1) | BR0010462B1 (en) |
| CA (1) | CA2372453C (en) |
| DE (1) | DE10084374B4 (en) |
| DK (1) | DK175963B1 (en) |
| ES (1) | ES2237983B1 (en) |
| GB (1) | GB2365438B (en) |
| LU (1) | LU90849B1 (en) |
| MX (1) | MXPA02001814A (en) |
| MY (1) | MY120636A (en) |
| WO (1) | WO2001034884A2 (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104389040B (en) * | 2014-10-28 | 2016-03-09 | 湖北博韬合纤有限公司 | The polypropylene dedicated staple fibre processing technology of light GMT plate |
| KR102251754B1 (en) * | 2019-12-24 | 2021-05-12 | 도레이첨단소재 주식회사 | Non-woven fabric with enhanced mechanical strength |
Family Cites Families (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| NL6910137A (en) * | 1968-07-04 | 1970-01-06 | ||
| JPS509810A (en) * | 1973-06-04 | 1975-01-31 | ||
| JP3070694B2 (en) * | 1991-06-11 | 2000-07-31 | 三井化学株式会社 | Ultra-high molecular weight stretched polypropylene article and method for producing the same |
| JP2948948B2 (en) * | 1991-07-08 | 1999-09-13 | 宇部日東化成 株式会社 | Thermal adhesive fiber |
| TW275076B (en) * | 1992-12-02 | 1996-05-01 | Hoechst Ag | |
| US5529845A (en) * | 1994-06-13 | 1996-06-25 | Montell North America Inc. | Fibers suitable for the production of nonwoven fabrics having improved strength and softness characteristics |
| JP3554433B2 (en) * | 1996-04-10 | 2004-08-18 | 特種製紙株式会社 | Recording sheet for wet electrophotography |
| JPH10195714A (en) * | 1996-12-27 | 1998-07-28 | Mitsui Chem Inc | Fiber made of polypropylene |
| US6416699B1 (en) * | 1999-06-09 | 2002-07-09 | Fina Technology, Inc. | Reduced shrinkage in metallocene isotactic polypropylene fibers |
-
2000
- 2000-10-18 MY MYPI20004879A patent/MY120636A/en unknown
- 2000-11-07 WO PCT/KR2000/001270 patent/WO2001034884A2/en active IP Right Grant
- 2000-11-07 DE DE10084374T patent/DE10084374B4/en not_active Expired - Fee Related
- 2000-11-07 EP EP00973247A patent/EP1234065B1/en not_active Expired - Lifetime
- 2000-11-07 CA CA002372453A patent/CA2372453C/en not_active Expired - Fee Related
- 2000-11-07 ES ES200250025A patent/ES2237983B1/en not_active Expired - Fee Related
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Also Published As
| Publication number | Publication date |
|---|---|
| EP1234065B1 (en) | 2006-03-22 |
| GB2365438B (en) | 2003-07-16 |
| AU1177801A (en) | 2001-06-06 |
| DE10084374B4 (en) | 2006-04-06 |
| DK200101392A (en) | 2001-09-25 |
| ES2237983B1 (en) | 2006-11-01 |
| BR0010462B1 (en) | 2011-03-22 |
| CA2372453A1 (en) | 2001-05-17 |
| MXPA02001814A (en) | 2002-09-24 |
| MY120636A (en) | 2005-11-30 |
| GB2365438A (en) | 2002-02-20 |
| EP1234065A2 (en) | 2002-08-28 |
| CA2372453C (en) | 2004-06-08 |
| ES2237983A1 (en) | 2005-08-01 |
| GB0121728D0 (en) | 2001-10-31 |
| CN1335901A (en) | 2002-02-13 |
| WO2001034884A3 (en) | 2001-10-18 |
| EP1234065A4 (en) | 2005-06-15 |
| BR0010462A (en) | 2003-07-08 |
| DK175963B1 (en) | 2005-09-19 |
| LU90849B1 (en) | 2002-01-24 |
| DE10084374T1 (en) | 2002-11-07 |
| AU768809B2 (en) | 2004-01-08 |
| WO2001034884A2 (en) | 2001-05-17 |
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