KR102055931B1 - Method of manufacturing superabsorbent yarn - Google Patents
Method of manufacturing superabsorbent yarn Download PDFInfo
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- KR102055931B1 KR102055931B1 KR1020140166128A KR20140166128A KR102055931B1 KR 102055931 B1 KR102055931 B1 KR 102055931B1 KR 1020140166128 A KR1020140166128 A KR 1020140166128A KR 20140166128 A KR20140166128 A KR 20140166128A KR 102055931 B1 KR102055931 B1 KR 102055931B1
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- yarn
- monomer mixture
- superabsorbent
- present
- manufacturing
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- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06M—TREATMENT, NOT PROVIDED FOR ELSEWHERE IN CLASS D06, OF FIBRES, THREADS, YARNS, FABRICS, FEATHERS OR FIBROUS GOODS MADE FROM SUCH MATERIALS
- D06M15/00—Treating fibres, threads, yarns, fabrics, or fibrous goods made from such materials, with macromolecular compounds; Such treatment combined with mechanical treatment
- D06M15/19—Treating fibres, threads, yarns, fabrics, or fibrous goods made from such materials, with macromolecular compounds; Such treatment combined with mechanical treatment with synthetic macromolecular compounds
- D06M15/21—Macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds
- D06M15/263—Macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds of unsaturated carboxylic acids; Salts or esters thereof
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- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Engineering & Computer Science (AREA)
- Textile Engineering (AREA)
- Treatments For Attaching Organic Compounds To Fibrous Goods (AREA)
Abstract
In the present invention, a superabsorbent monomer mixture is applied to a yarn and then heat treated to polymerize and crosslink the monomer mixture to produce a superabsorbent yarn.
In the present invention, since the monomer mixture is used instead of the conventional polymerized polymer dispersion or aqueous solution as the coating liquid to impart high absorbency, the manufacturing process is simplified and the manufacturing cost is low.
In addition, the present invention improves productivity due to a faster drying speed due to the reaction heat generated when the monomers in the monomer mixture are polymerized and crosslinked in the heat treatment process.
In addition, the present invention, the surfactant contained in the monomer mixture to reduce the degree of crosslinking to increase the water absorption, the surfactant acts as a fiber emulsion to reduce the friction with the guide during the production process to prevent the super absorbent coating layer from being peeled off give.
Description
The present invention relates to a method for manufacturing a super absorbent yarn, and in particular, a superabsorbent monomer mixture is coated on a yarn and then heat treated to polymerize and crosslink the monomer mixture to form a superabsorbent coating layer on the yarn. By manufacturing the yarn, the manufacturing process is simplified, the manufacturing cost is low, the drying speed is increased due to the heat of reaction during the polymerization and the crosslinking reaction, and the productivity is improved. The present invention relates to a method for manufacturing a super absorbent yarn which prevents the superabsorbent coating layer from being peeled off by increasing friction between the guide and the super absorbent polymer.
Recently, the rapid development of information and communication demands the development of new design and performance of optical cable along with the increase of demand for optical cable. One of them is to block the water that penetrates into the optical cable. The optical cable is mainly buried underground, and the impact or force from the outside causes a gap in the plastic insulator surrounding the outer part of the optical cable, which causes the surrounding water to penetrate into the optical cable. This intrusion of water results in short circuits between the wires, resulting in damage to the optical cable. If this problem occurs, the damaged part of the cable must be found and replaced. However, since the optical cable is installed underground or placed under a pool of water such as a sea or river, the damaged part of the cable is located and replaced. The work you do is time consuming and expensive. As a way to effectively prevent this, by applying a super absorbent polymer to the outer portion of the wire to penetrate the outside of the wire to absorb the water to strengthen the function to protect the wire. Currently, the method of coating the superabsorbent polymer varies from spraying the superabsorbent polymer particles on the cable to winding the cable with a tape coated with the superabsorbent polymer.
Superabsorbent yarns coated with superabsorbent materials on aramid fibers can be used in the manufacture of optical communication cables, in which case they function as reinforcing members and water blocking members.
As one of the manufacturing methods of the superabsorbent yarn, there is a method of impregnating the insoluble superabsorbent material dispersed in water into the yarn and then performing a drying process. However, according to this method, a yarn having satisfactory absorbency cannot be manufactured due to the impregnation decrease due to the high viscosity.
Methods for improving impregnation are disclosed in US Pat. No. 5,635,569 and US Pat. No. 5,264,251. According to this, a yarn coated with a superabsorbent material is prepared by impregnating the water-in-oil emulsion containing a superabsorbent material in an aqueous phase and then performing a drying process. However, this method also has serious drawbacks. That is, additional equipment and costs for the treatment of these harmful substances are further required because environmentally causing substances such as isohexadecane are released during the drying process.
To solve the above problem, U.S. Pat.No. 5,100,397, U.S. Pat.No.6,319,558, and U.S. Pat.No.6,284,367 provide a coating or coating of an aqueous solution comprising a water-soluble crosslinkable polymer. After impregnation, a method of converting the water-soluble polymer into a water-insoluble superabsorbent material by cross-linking the water-soluble polymer is proposed.
This method requires that the yarn undergo a high temperature heat treatment for a long time in order to crosslink the water-soluble polymer, which is not crosslinked at all, to a degree sufficient to form a high level of water-insoluble water-soluble material. However, when a high temperature heat treatment is performed for a long time, damage to the yarn is caused, which causes a decrease in strength and elongation of the yarn. The decrease in strength and elongation of the yarn to be used as reinforcement for the optical cable is fatal. Moreover, the longer the heat treatment time of the high temperature is economically disadvantageous, such as productivity is lowered and energy use is increased.
The problem of the present invention is to solve the problems of the prior art by increasing the drying speed of the absorbent imparting material applied to the yarn to improve productivity, simplify the manufacturing process, inexpensive manufacturing cost, reduce the crosslinking degree of the absorbent imparting material It is to provide a method of manufacturing a superabsorbent yarn which can increase the absorbency and effectively prevent the superabsorbent coating layer from peeling off due to friction with the guide.
In order to achieve these problems, the present invention uses a superabsorbent monomer mixture instead of using a conventional polymer dispersion or aqueous solution as a material for imparting absorbency.
Specifically, the present invention applies a super absorbent monomer mixture to the yarn and heat treatment to polymerize and crosslink the monomer mixture to produce a super absorbent yarn.
In the present invention, since the monomer mixture is used instead of the conventional polymerized polymer dispersion or aqueous solution as the coating liquid to impart high absorbency, the manufacturing process is simplified and the manufacturing cost is low.
In addition, the present invention improves productivity due to a faster drying speed due to the reaction heat generated when the monomers in the monomer mixture are polymerized and crosslinked in the heat treatment process.
In addition, the present invention, the surfactant contained in the monomer mixture to reduce the degree of crosslinking to increase the water absorption, the surfactant acts as a fiber emulsion to reduce the friction with the guide during the production process to prevent the super absorbent coating layer from being peeled off give.
Hereinafter, the manufacturing method of the superabsorbent yarn according to the present invention will be described in detail.
It will be apparent to those skilled in the art that various changes and modifications of the present invention are possible without departing from the spirit and scope of the present invention. Accordingly, the invention includes all modifications and variations that fall within the scope of the invention as set forth in the claims and their equivalents.
The present invention provides a process for preparing a monomer mixture comprising (i) a water-soluble ethylenically unsaturated compound containing acrylic acid, a polymerization initiator, a crosslinking agent, a surfactant, and an aqueous solvent; (Ii) impregnating a yarn in the monomer mixed liquid to apply the monomer mixed liquid to the yarn; And (iii) subjecting the yarn to which the monomer mixture solution is applied to heat to polymerize and crosslink the monomer mixture solution applied to the yarn.
Specifically, in the present invention, a monomer mixture containing acrylic acid containing a water-soluble ethylenically unsaturated compound, a polymerization initiator, a crosslinking agent, a surfactant, and an aqueous solvent is prepared.
The monomer mixture may further include other additive components in addition to the water-soluble ethylenically unsaturated compound, a polymerization initiator, a crosslinking agent, a surfactant, and an aqueous solvent.
In one embodiment, the monomer mixture is prepared by mixing the water-soluble ethylenically unsaturated compound, a polymerization initiator, a crosslinking agent, a surfactant, and an aqueous solvent.
The water-soluble ethylenically unsaturated compound containing acrylic acid is acrylic acid, a salt of acrylic acid, methacrylic acid, a salt of methacrylic acid, acrylamide or a mixture thereof.
As an example of the polymerization initiator, a persulfate compound such as ammonium persulfate is used.
The surfactant is polyoxyethylene alkyl ether, polyoxyethylene fatty acid ester, polyoxyethylene alkyl phenol ether, sorbitan fatty acid ester, or a mixture thereof.
In the present invention, a surfactant is included in the monomer mixture.
The surfactant increases the absorbency by relieving the degree of crosslinking during heat treatment, and performs a fiber emulsion role to effectively prevent the superabsorbent coating layer from being peeled off by reducing the friction between the superabsorbent coating layer and the guide.
Next, the monomer mixed liquid is impregnated with a yarn and the monomer mixed liquid is applied to the yarn.
The yarn is aramid multifilament or glass fiber.
Next, the yarn coated with the monomer mixture is heat-treated to polymerize and crosslink the monomer mixture applied to the yarn to prepare a superabsorbent yarn.
The heat treatment is preferably carried out for 10 to 90 seconds while passing the yarn coated with the monomer mixture into the heat treatment unit having a temperature of 150 ~ 300 ℃.
Meanwhile, in the present invention, a step of removing a portion of the monomer mixture liquid applied in excess while passing through the micropores before heat treatment of the yarn to which the monomer mixture liquid is applied may be further performed.
In the present invention, since the monomer mixture is used instead of the conventional polymerized polymer dispersion or aqueous solution as the coating liquid to impart high absorbency, the manufacturing process is simplified and the manufacturing cost is low.
In addition, the present invention improves productivity due to a faster drying speed due to the reaction heat generated when the monomers in the monomer mixture are polymerized and crosslinked in the heat treatment process.
In addition, the present invention, the surfactant contained in the monomer mixture to reduce the degree of crosslinking to increase the water absorption, the surfactant acts as a fiber emulsion to reduce the friction with the guide during the production process to prevent the super absorbent coating layer from being peeled off give.
Hereinafter, the effects of the present invention will be described in more detail through Examples and Comparative Examples. The embodiments illustrated below are merely to aid the understanding of the present invention and do not limit the scope of the present invention.
Example One
200 g acrylic acid, 20 g acrylamide, 0.2 g ethylene glycol diglycidyl ether (crosslinker), 0.3 g ammonium persulfate (initiator), 5 g foxyoxyethylene nonylphenyl ether (surfactant), 90 g caustic soda and 2790 g water This mixture was prepared to prepare a monomer mixture having a monomer concentration of 10% by weight.
Next, the impregnated aramid filament having a fineness of 2,840 denier was impregnated into the prepared monomer mixture, and the excess impregnation liquid (monomer mixture) was removed while passing through a fine hole.
Next, the superabsorbent yarn was prepared by heat treatment for 20 seconds while passing the aramid filament impregnated with the monomer mixture into the heat treatment unit at 300 ℃.
The results of evaluating various physical properties of the prepared superabsorbent yarn were as shown in Table 1.
Example 2
A superabsorbent yarn was prepared under the same conditions as in Example 1 except that the water content was changed to 4,100 g when preparing the monomer mixture in Example 1.
The results of evaluating various physical properties of the prepared superabsorbent yarn were as shown in Table 1.
Example 3
Super absorbent yarn was prepared under the same conditions as in Example 1, except that the water content was changed to 5,800 g when preparing the monomer mixture in Example 1.
The results of evaluating various physical properties of the prepared superabsorbent yarn were as shown in Table 1.
Comparative Example One
The monomer mixture and the superabsorbent yarn were prepared under the same conditions as in Example 1 except that polyoxyethylene nonylphenylether (surfactant) was not added when preparing the monomer mixture in Example 1. The results of evaluating various physical properties of the prepared superabsorbent yarn were as shown in Table 1.
Comparative Example 2
The monomer mixture and the superabsorbent yarn were prepared under the same conditions as in Example 2 except that the polyoxyethylene nonylphenylether (surfactant) was not added when preparing the monomer mixture in Example 2. The results of evaluating various physical properties of the prepared superabsorbent yarn were as shown in Table 1.
Comparative Example 3
The monomer mixture and the superabsorbent yarn were prepared under the same conditions as in Example 3 except that polyoxyethylene nonylphenylether (surfactant) was not added when preparing the monomer mixture in Example 3. The results of evaluating various physical properties of the prepared superabsorbent yarn were as shown in Table 1.
Various physical properties of the superabsorbent yarns described in Table 1 were measured by the following method.
Absorbency Measurement of Thread
2 g of the actual sample was taken, cut into uniform lengths of about 2 cm, and then immersed in 500 mL of distilled water at 20 ° C. for 2 minutes. Excess water was removed from the completely wet samples by centrifugation (2000 rpm, 1 min). After weighing the samples from which excess water was removed, the samples were hot air dried in an oven at 110 ° C. for 24 hours. After measuring the weight of each dried sample, the absorbency of the yarn was calculated using Equation 1 below.
Equation 1: Absorbency of yarn (%) = [(A-B) / B] × 100
Here, A is the weight of the sample measured in the state of excess water removed after dipping in distilled water, B is the weight of the sample measured after hot air drying.
Strength of the thread and Elongation Measure
In accordance with the ASTM D885 regulations, the Instron Engineering Corp. (Canton, Mass) was stretched until the 25 cm long sample was broken, and then the strength and elongation at the fracture point were determined. At this time, the tensile velocity was 300 mm / min, and the initial load was fineness x 1/30 g. After repeating this process five times, the average value was obtained.
Claims (7)
(Ii) impregnating a yarn in the monomer mixed liquid to apply the monomer mixed liquid to the yarn; And
(Iii) a step of subjecting the yarn to which the monomer mixture is applied to heat treatment to polymerize and crosslink the monomer mixture to be applied to the yarn;
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| Application Number | Priority Date | Filing Date | Title |
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| KR1020140166128A KR102055931B1 (en) | 2014-11-26 | 2014-11-26 | Method of manufacturing superabsorbent yarn |
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| KR1020140166128A KR102055931B1 (en) | 2014-11-26 | 2014-11-26 | Method of manufacturing superabsorbent yarn |
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| KR102055931B1 true KR102055931B1 (en) | 2019-12-13 |
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| KR102131608B1 (en) * | 2019-06-19 | 2020-07-10 | 정영철 | Clothing for children and manufacturing method thereof |
| KR102078545B1 (en) * | 2019-06-19 | 2020-02-19 | 평화장갑(주) | Hand gloves of fleece for training and manufacturing method thereof |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6319558B1 (en) | 1997-08-22 | 2001-11-20 | Akzo Nobel Nv | Process for manufacture of superabsorbent-coated yarn |
| JP2004149970A (en) * | 2002-10-31 | 2004-05-27 | Daio Paper Corp | Method for producing water-absorbing composite |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0925141A (en) * | 1995-07-10 | 1997-01-28 | Mitsuboshi Belting Ltd | Treatment of glass fiber and treating device |
| US6565981B1 (en) * | 1999-03-30 | 2003-05-20 | Stockhausen Gmbh & Co. Kg | Polymers that are cross-linkable to form superabsorbent polymers |
| JP6055293B2 (en) * | 2012-11-27 | 2016-12-27 | 公益財団法人野口研究所 | Ether compound production method |
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Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6319558B1 (en) | 1997-08-22 | 2001-11-20 | Akzo Nobel Nv | Process for manufacture of superabsorbent-coated yarn |
| JP2004149970A (en) * | 2002-10-31 | 2004-05-27 | Daio Paper Corp | Method for producing water-absorbing composite |
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