KR101961191B1 - Polyethylene articles made of high strength polyethylene fibers - Google Patents
Polyethylene articles made of high strength polyethylene fibers Download PDFInfo
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- KR101961191B1 KR101961191B1 KR1020170096411A KR20170096411A KR101961191B1 KR 101961191 B1 KR101961191 B1 KR 101961191B1 KR 1020170096411 A KR1020170096411 A KR 1020170096411A KR 20170096411 A KR20170096411 A KR 20170096411A KR 101961191 B1 KR101961191 B1 KR 101961191B1
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- polyethylene
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- fibers
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- D—TEXTILES; PAPER
- D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
- D04B—KNITTING
- D04B1/00—Weft knitting processes for the production of fabrics or articles not dependent on the use of particular machines; Fabrics or articles defined by such processes
- D04B1/14—Other fabrics or articles characterised primarily by the use of particular thread materials
- D04B1/16—Other fabrics or articles characterised primarily by the use of particular thread materials synthetic threads
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- D—TEXTILES; PAPER
- D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
- D04B—KNITTING
- D04B1/00—Weft knitting processes for the production of fabrics or articles not dependent on the use of particular machines; Fabrics or articles defined by such processes
- D04B1/22—Weft knitting processes for the production of fabrics or articles not dependent on the use of particular machines; Fabrics or articles defined by such processes specially adapted for knitting goods of particular configuration
- D04B1/24—Weft knitting processes for the production of fabrics or articles not dependent on the use of particular machines; Fabrics or articles defined by such processes specially adapted for knitting goods of particular configuration wearing apparel
- D04B1/28—Weft knitting processes for the production of fabrics or articles not dependent on the use of particular machines; Fabrics or articles defined by such processes specially adapted for knitting goods of particular configuration wearing apparel gloves
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- D—TEXTILES; PAPER
- D10—INDEXING SCHEME ASSOCIATED WITH SUBLASSES OF SECTION D, RELATING TO TEXTILES
- D10B—INDEXING SCHEME ASSOCIATED WITH SUBLASSES OF SECTION D, RELATING TO TEXTILES
- D10B2321/00—Fibres made from polymers obtained by reactions only involving carbon-to-carbon unsaturated bonds
- D10B2321/02—Fibres made from polymers obtained by reactions only involving carbon-to-carbon unsaturated bonds polyolefins
- D10B2321/021—Fibres made from polymers obtained by reactions only involving carbon-to-carbon unsaturated bonds polyolefins polyethylene
- D10B2321/0211—Fibres made from polymers obtained by reactions only involving carbon-to-carbon unsaturated bonds polyolefins polyethylene high-strength or high-molecular-weight polyethylene, e.g. ultra-high molecular weight polyethylene [UHMWPE]
Abstract
The present invention relates to a polyethylene article formed from a high-strength polyethylene fiber made of a polyethylene resin composition having a melt index of 0.6 to 2 g / 10 min and a molecular weight distribution index of 5 to 10, and more specifically to a knitted polyethylene article, 0.5 or less, a lubrication property of 2 gf or less, and an index according to a cutting resistance standard of 3 or more.
Description
The present invention relates to a polyethylene article formed of a high strength polyethylene fiber, and more particularly, to a polyethylene article formed of a high strength polyethylene fiber which is flexible and has a constant coefficient of friction and is soft in touch and excellent in cutting resistance.
Polyethylene resin is used for engineering plastics, films, fibers and nonwoven fabrics because of its low price, excellent chemical resistance and product processability. In the textile field, it is made of monofilaments and multifilaments, Applications are being expanded. Particularly, there is an increasing interest in high-performance polyethylene fibers which require high strength and high elasticity according to the latest fiber trends.
Korean Patent Nos. 10-0308739 and 10-0459575 disclose a method of producing fibers having a strength of 30 g / d and an elastic modulus of 900 g / d or more using ultrahigh molecular weight polyethylene having an intrinsic viscosity [?] 5 or more.
U.S. Patent No. 4,228,118 discloses a polyethylene resin having a number average molecular weight of 20,000 or more and a weight average molecular weight of 125,000 or less and is melted at a radiation temperature of 220 to 335 ° C and extruded into a nozzle having 8 holes and stretched 20 times or more, 20 g / d of fibers were prepared.
Korean Patent No. 10-0909559 discloses a high strength polyethylene fiber having a weight average molecular weight of 300,000 or less and a weight average molecular weight to number average molecular weight (Mw / Mn) of 4.0 or less, which is a molecular weight distribution index .
The present invention provides a high-strength polyethylene article having a low coefficient of friction on the surface and having a multi-functional property by using a high-strength polyethylene fiber obtained from a polyethylene resin composition whose molecular weight distribution and melt index are controlled to a certain level.
The present invention provides a polyethylene article formed of a high strength polyethylene fiber made of a polyethylene resin composition having a melt index of 0.6 to 2 g / 10 min and a molecular weight distribution index of 5 to 10.
Also, the polyethylene fiber has a strength of 12 to 16 g / d, and the polyethylene product is formed of a high-strength polyethylene fiber.
Also, the polyethylene article is a knitted fabric manufactured by a knitting machine or a glove knitting machine, and provides a polyethylene article formed from the high-strength polyethylene fiber.
Also, the polyethylene article has a coefficient of friction of 0.5 or less. The polyethylene article is formed of a high-strength polyethylene fiber.
Also, the polyethylene article has a liner property of 0.2 gf or less. The polyethylene article is formed of a high-strength polyethylene fiber.
Further, the polyethylene article is a polyethylene article formed of a high-strength polyethylene fiber having a level of 3 or more according to a cutting resistance standard.
The polyethylene product formed of the high-strength polyethylene fiber according to the present invention has an excellent strength and has a low friction coefficient when it is made into a knitted fabric, so that a soft touch is formed, and flexibility and good comfort are obtained.
In addition, the polyethylene product formed from the high-strength polyethylene fiber according to the present invention is excellent in resistance to cutting and has an effect of improving stability.
BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a graph showing a frictional force of a polyethylene article manufactured by an embodiment of the present invention. FIG.
Hereinafter, a preferred embodiment of the present invention will be described in detail. In the following description of the present invention, a detailed description of known functions and configurations incorporated herein will be omitted so as to avoid obscuring the subject matter of the present invention.
The terms " about ", " substantially ", etc. used to the extent that they are used herein are intended to be taken to mean an approximation of, or approximation to, the numerical values of manufacturing and material tolerances inherent in the meanings mentioned, Accurate or absolute numbers are used to help prevent unauthorized exploitation by unauthorized intruders of the referenced disclosure.
TECHNICAL FIELD The present invention relates to a polyethylene article formed of a high-strength polyethylene fiber, and more particularly, to a polyethylene article having a low coefficient of surface friction, excellent wearing comfort, excellent cutting resistance, and improved stability.
In preparing the high-strength polyethylene fiber, a polyethylene resin having an appropriate level of melt index and molecular weight distribution index capable of exhibiting high strength characteristics is selected by melt spun polyethylene terephthalate, (Kiss Roller or Jet Oiler) prior to the high-precision roller, then subjecting to stretching, heat fixing, and relaxation through a multi-stage high-precision roller, and then winding the sheet.
The polyethylene resin having a melt index of 0.6 to 2.0 g / 10 min and preferably 0.8 to 1.4 g / 10 min is used. If the melt index is less than 0.6 g / 10 min, the flowability of the melt of the polyethylene resin in the extruder is not good and the spinning speed can not be increased, which may cause problems such as nozzle face refinement during spinning. When the melt index exceeds 2.0 g / 10 min, the spinning workability is excellent, but the flowability at an appropriate spinning temperature is not suitable, and it may be difficult to obtain polyethylene fibers having high strength after stretching.
The polyethylene resin used in the present invention has a weight average molecular weight (Mw) of 100,000 to 300,000 and a molecular weight distribution index (weight average molecular weight / number average molecular weight, Mw / Mn) of 5 to 10.
When the weight average molecular weight (Mw) is less than 100,000, the spinning workability of spinning is improved, but there is a limit in manifesting high strength. When the weight average molecular weight is more than 300,000, Workability can be adversely affected.
When the molecular weight distribution index is less than 5, high-magnification elongation of 10 times or more is required in order to exhibit high strength, and defects of the mowing and elongating rollers are increased, which may deteriorate quality as the number of stretching is increased. In addition, when the molecular weight distribution index is more than 10, since a large number of high molecular weight polyethylene and low molecular weight polyethylene in polyethylene resin are mixed, a smooth drawing process can not be performed, and thus there is a limitation in expressing high strength.
Specifically, the polyethylene resin having the controlled molecular weight distribution index and melt index is melted in an extruder, a nozzle hot tube is installed to spin the unstretched fiber at a low speed of 1000 m / min or less, and then cooled And can be produced by solidification. The inside of the extruder can be divided into four zones, and the temperature range of each temperature zone can be set to 200 to 270 ° C, preferably 220 to 250 ° C. When the temperature range is less than 200 ° C, the uniformity of the non-drawn yarn is good, but there is a high possibility of occurrence of static electricity during spinning, and the workability in the stretching process is low. If the temperature range is higher than 270 캜, the stretching magnification can be improved in the stretching step, but cooling and solidification of the unstretched yarn becomes difficult to lower the uniformity of the unstretched yarn, and the number of stretch- Can fall.
The spinning nozzle has 60 holes to 400 holes, and the mono-fineness of the high-strength polyethylene fibers formed thereby forms 5 denier or less, preferably 0.5 to 2.5 denier.
The polyethylene undrawn yarn is stretched in a multi-stage stretching roller, then subjected to a heat fixing process in a roller, relaxed on a roller rotating at a high speed, and then wound to produce polyethylene fiber.
The multi-stage stretching roller may include a roller unit including a plurality of rollers and a non-contact heating chamber disposed between the roller units.
The roller portion and the non-contact type heating chamber can be temperature-settable and controllable. Specifically, the roller portion and the non-contact type heating chamber are preferably set to be 20 to 60 DEG C or lower than the melting point of the polyethylene resin. If the temperature of the roller portion and the non-contact heating chamber is lower than 20 DEG C lower than the melting point of the polyethylene resin, there is a possibility that the polyethylene undrawn yarn is melted during drawing to affect the workability of the unstretched yarn, The product may be subject to maritime. If the melting point is lower than 60 deg. C, a problem may arise in that high elongation is caused due to uneven elongation.
The stretching process step according to the present invention allows the stretching point to be formed in the non-contact heating chamber by controlling the stretching ratio. The drawing point is formed in the non-contact heating chamber to minimize the defects generated on the surface of the roller made of metal by the polyethylene undrawn yarn, and the polyethylene multi-filament unstretched filaments having the filament count of at least 60 strands are uniformly heated to improve the drawing workability It is possible to minimize the occurrence of mowing.
Specifically, in order to form the drawing point in the non-contact heating chamber, it is preferable to set the total drawing ratio DR of the drawing process step to 6 to 10 on the premise of multi-stage drawing. If the total draw ratio DR is lower than 6, the strength of the polyethylene fiber is lowered. If the total draw ratio DR is higher than 10, the filament may be severely stretched during the drawing, so that the quality of the polyethylene fiber may deteriorate.
The multi-stage drawing preferably forms at least three or more multi-step drawing. In one embodiment of the present invention, the multi-step stretching is performed by a single-stage deformation D1 of the first non-contact type heating chamber, a double-deck extension D2 of the second non-contact type heating chamber, , The stretching point can be formed in the non-contact heating chamber if the following formula is satisfied.
(Equation)
1. 3.0 <D1 / D2 <4.2
2. 1.2 < D2 / D3 < 1.5
(D1, D2, D3 > = 1)
The non-drawn filaments generated on the metal roller surface are minimized, and the non-drawn filament, which is a multifilament, is uniformly heated by the non-contact heating chamber, It is possible to minimize the number of occurrences and stretch truncations.
The polyethylene fibers that have undergone the multi-stage stretching process step satisfying the above formula are excellent in strength, the number of stretch filaments is not more than 5 times per 100,000 m of polyethylene fiber, and the frequency of occurrence of loops or moths during stretching is less than 10 per 100,000 m . If the number of stretch filaments exceeds 5 and the frequency of occurrence of breasts exceeds 10, defects such as lumps of polyethylene fibers may act, resulting in problems in workability in post-weaving and knitting, and quality may be deteriorated .
Also, the high strength polyethylene fiber according to one embodiment of the present invention may have excellent physical properties such as strength of 12 to 16 g / d, mono fineness of 0.5 to 2.5, and number of strands of 60 to 400.
In one embodiment of the present invention, a high-strength polyethylene article formed by knitting a covering yarn including the high-strength polyethylene fibers has a surface friction coefficient of 0.5 or less. If the coefficient of friction of the surface exceeds 0.5, the softness of the surface is lowered and the feeling of wearing of the article is lowered.
In addition, as the number of filaments is small, the coefficient of friction of the surface is high, and the compatibility between the covered yarns is high, so that the occurrence of defects or surface defects is minimized, and the coefficient of friction is low.
Further, a high-strength polyethylene article formed by knitting a covering yarn including the high-strength polyethylene fibers has a lubrication property of 2 gf or less. When the lubrication property exceeds 2 gf, the bending force of the article is strong, resulting in poor flexibility and a poor feeling of wearing.
Hereinafter, a high strength polyethylene article was prepared according to an embodiment of the present invention. But the present invention is not limited to these examples.
◈ Measurement method
Friction coefficient of knitted fabric: Friction coefficient was measured according to ASTM D1894, and the value measured five times at a rate of 50 mm / min at a temperature of 20 캜 and a relative humidity of 65% was defined as averaging.
F = μN
F is defined as frictional force, μ is friction coefficient, and N is defined as normal force, and vertical force is assumed to be equal to friction coefficient because 1kgf weight is used.
Measurement of the laminating property of the knitted fabric: The laminating property of the knitted fabric was measured by Handle-O-Meter according to ASTM D2923 and ASTM D6828. The flexibility is defined as the composite force of the frictional force generated when the specimen slips when the specimen is pushed into the slit grooves, and the resistance force at the time of the connection.
Strength measurement: Measured according to ASTM D-2256 using a universal testing machine UTM (Universal Testing Mechine, INSTRON) and measured 10 times at a rate of 300 mm / min under a temperature of 20 ° C and a relative humidity of 65% As the mean value.
Strength is defined as the value of g / d divided by the denier, when the tensile fibers are cut, by holding the fibers in an universal testing machine and applying tensile load at the above speed to yield a stress-strain curve.
Safety glove fit test: The safety glove was manufactured according to one embodiment of the present invention, and sensitivity evaluation was carried out through a random blind test. The scores were divided into 1 point (poor) to 5 points (excellent).
Index and level of cut resistance: Mesdan Yarn cut tester, a device manufactured in accordance with EN388 standard, was used to evaluate the cut resistance of fabric or knitted fabric. The measurement was performed by placing an aluminum foil wrapped with a filter paper on a rubber support, placing the control sample and the test sample, measuring the control sample and the test sample five times before the test, and evaluating the index as follows.
<Cutting resistance index>
Control specimen
Test specimen
Control specimen
Index
[Equation 1]
<Cutting resistance level>
Example 1 to 4
A polyethylene chip having a melt index of 0.6 to 2 g / 10 min and a molecular weight distribution index of 5 to 10 is put into an extruder to extrude the molten polymer and cooled by using a cooling device. Then, And the non-drawn filament with the emulsion attached thereto was wound up, followed by stretching and heat treatment while passing through three godet rollers. Thereafter, high-strength polyethylene fibers were produced by winding using an entangling apparatus and a winder.
A covering yarn including the high-strength polyethylene fibers was prepared, knitted using the knitting machine, and a safety glove was manufactured. Table 3 shows physical properties of high-strength polyethylene fibers and properties of polyethylene articles according to an embodiment of the present invention.
Comparative Example 1 to 6
Table 4 shows the physical properties of the polyethylene fibers and the physical properties of the polyethylene products according to the comparative examples.
FIG. 1 is a graph showing a friction force graph of a polyethylene article manufactured by Example 1 of the present invention, and shows an average value for three measured values.
As can be seen from the above examples, the polyethylene article produced according to the present invention has a low frictional coefficient on the surface of the fiber and is excellent in wearing feeling, and the flexibility of the knitted fabric is low, It can be confirmed that the sex level is good.
Claims (6)
The high-strength polyethylene fiber is formed by multi-step stretching using a multi-step stretching roller including a roller portion and a non-contact heating chamber,
Wherein the multi-stage draw is a three-stage draw comprising D1, D2 and D3, and the draw ratio satisfies the following formula.
(Equation)
1. 3.0 <D1 / D2 <4.2
2. 1.2 < D2 / D3 < 1.5
(D1, D2, D3 > = 1)
Wherein the polyethylene fibers are formed of high strength polyethylene fibers having a strength of 12 to 16 g / d.
Wherein the polyethylene article is a knitted fabric manufactured by a knitting machine or a glove knitting machine.
Wherein the polyethylene article is formed of a high-strength polyethylene fiber having a coefficient of friction of 0.5 or less.
Wherein the polyethylene article is formed of a high strength polyethylene fiber having a lapping property of 0.2 gf or less.
Wherein the polyethylene article has a level of not less than 3 according to the cut-resistant property standard, the polyethylene article being formed of a high-strength polyethylene fiber.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR1020170096411A KR101961191B1 (en) | 2017-07-28 | 2017-07-28 | Polyethylene articles made of high strength polyethylene fibers |
| PCT/KR2017/013372 WO2019022310A1 (en) | 2017-07-28 | 2017-11-22 | Polyethylene article formed of high-strength polyethylene fiber |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR1020170096411A KR101961191B1 (en) | 2017-07-28 | 2017-07-28 | Polyethylene articles made of high strength polyethylene fibers |
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| Publication Number | Publication Date |
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| KR20190012828A KR20190012828A (en) | 2019-02-11 |
| KR101961191B1 true KR101961191B1 (en) | 2019-03-21 |
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| KR1020170096411A KR101961191B1 (en) | 2017-07-28 | 2017-07-28 | Polyethylene articles made of high strength polyethylene fibers |
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| WO (1) | WO2019022310A1 (en) |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
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| KR102092934B1 (en) * | 2019-03-21 | 2020-03-24 | 코오롱인더스트리 주식회사 | Cut Resistant Polyethylene Yarn, Method for Manufacturing The Same, and Protective Article Produced Using The Same |
| KR102183247B1 (en) * | 2019-07-01 | 2020-11-26 | 주식회사 휴비스 | High-strength polyethylene fiber having enhanced cool feeling, and manufacturing method thereof |
| US20230371626A1 (en) * | 2020-10-29 | 2023-11-23 | Kolon Industries, Inc. | Functional fabric |
| KR20220149153A (en) | 2021-04-30 | 2022-11-08 | 여민지 | Hyaluronic acid powder pack |
| KR20220149143A (en) | 2021-04-30 | 2022-11-08 | 여민지 | Moisture Powder Pack |
| KR102602212B1 (en) * | 2022-11-01 | 2023-11-13 | 최재호 | Polyethylene Multifilament Fiber and Method for Manufacturing the Same |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100376730C (en) * | 2002-04-09 | 2008-03-26 | 东洋纺织株式会社 | Polyethylene fiber and process for producing the same |
| JP2004316037A (en) * | 2003-04-18 | 2004-11-11 | Japan Polyolefins Co Ltd | Multifilament and method for producing the same |
| JP2005248345A (en) * | 2004-03-02 | 2005-09-15 | Toyobo Co Ltd | Knitted fabric having excellent cutting resistance, and utilization thereof |
| KR101025038B1 (en) * | 2009-05-07 | 2011-03-25 | 주식회사 엘지화학 | Olefin-Based Polymers and Fibers Comprising the Same |
| KR101775142B1 (en) * | 2014-11-19 | 2017-09-05 | 주식회사 휴비스 | A polyethylene multifilament fiber with high tenacity and its manufacturing process |
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2017
- 2017-07-28 KR KR1020170096411A patent/KR101961191B1/en active IP Right Grant
- 2017-11-22 WO PCT/KR2017/013372 patent/WO2019022310A1/en active Application Filing
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| Publication number | Publication date |
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| WO2019022310A1 (en) | 2019-01-31 |
| KR20190012828A (en) | 2019-02-11 |
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