KR20140109418A - Non-woven fabric for use in disposable body warmer - Google Patents
Non-woven fabric for use in disposable body warmer Download PDFInfo
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- KR20140109418A KR20140109418A KR1020147018879A KR20147018879A KR20140109418A KR 20140109418 A KR20140109418 A KR 20140109418A KR 1020147018879 A KR1020147018879 A KR 1020147018879A KR 20147018879 A KR20147018879 A KR 20147018879A KR 20140109418 A KR20140109418 A KR 20140109418A
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- polyester
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- D—TEXTILES; PAPER
- D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
- D04H—MAKING TEXTILE FABRICS, e.g. FROM FIBRES OR FILAMENTARY MATERIAL; FABRICS MADE BY SUCH PROCESSES OR APPARATUS, e.g. FELTS, NON-WOVEN FABRICS; COTTON-WOOL; WADDING ; NON-WOVEN FABRICS FROM STAPLE FIBRES, FILAMENTS OR YARNS, BONDED WITH AT LEAST ONE WEB-LIKE MATERIAL DURING THEIR CONSOLIDATION
- D04H3/00—Non-woven fabrics formed wholly or mainly of yarns or like filamentary material of substantial length
- D04H3/08—Non-woven fabrics formed wholly or mainly of yarns or like filamentary material of substantial length characterised by the method of strengthening or consolidating
- D04H3/14—Non-woven fabrics formed wholly or mainly of yarns or like filamentary material of substantial length characterised by the method of strengthening or consolidating with bonds between thermoplastic yarns or filaments produced by welding
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- D—TEXTILES; PAPER
- D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
- D04H—MAKING TEXTILE FABRICS, e.g. FROM FIBRES OR FILAMENTARY MATERIAL; FABRICS MADE BY SUCH PROCESSES OR APPARATUS, e.g. FELTS, NON-WOVEN FABRICS; COTTON-WOOL; WADDING ; NON-WOVEN FABRICS FROM STAPLE FIBRES, FILAMENTS OR YARNS, BONDED WITH AT LEAST ONE WEB-LIKE MATERIAL DURING THEIR CONSOLIDATION
- D04H3/00—Non-woven fabrics formed wholly or mainly of yarns or like filamentary material of substantial length
- D04H3/005—Synthetic yarns or filaments
- D04H3/009—Condensation or reaction polymers
- D04H3/011—Polyesters
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
- A61F7/00—Heating or cooling appliances for medical or therapeutic treatment of the human body
- A61F7/02—Compresses or poultices for effecting heating or cooling
- A61F2007/0225—Compresses or poultices for effecting heating or cooling connected to the body or a part thereof
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- Engineering & Computer Science (AREA)
- Textile Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Nonwoven Fabrics (AREA)
- Thermotherapy And Cooling Therapy Devices (AREA)
Abstract
A problem to be solved by the present invention is to provide a nonwoven fabric for a hand heater, which has required flexibility, abrasion resistance, required workability, and low cost in a hand warmer nonwoven fabric. The nonwoven fabric for a hand warmer according to the present invention is a nonwoven fabric for a hand stove having a weight per unit area of 15 to 60 g / m 2, a wear resistance of not less than grade 3, and a bending rigidity of 0.3 gf · cm 2 / It is a nonwoven fabric for hand heaters using long-fiber nonwoven fabric.
Description
The present invention relates to a nonwoven fabric for a hand stove having a suitable feel and abrasion resistance, good workability, and low cost.
Disposable hand heaters are made by wrapping a heat generating material that generates heat in air in a fabric such as a nonwoven fabric with a material laminated with a film such as polyethylene and piercing fine holes in the laminated material to allow air to flow in and out, It is heated by oxidation reaction by contact.
Among the laminated materials, the fabric is a member that contacts the human body. As a function of the hand warmer, a function of adjusting the heat generated from the exothermic material by moderate warmth and a function of providing softness in contact with the human body are required. In addition, in the hand stove which is not stuck, a function for preventing the deterioration of the feeling of use due to the fluff diary of the fabric accompanying the user's rubbing standby operation is also required.
In addition, the fabric must have breathability because it exotherms as a result of contact with the air that has passed through the micropores in the laminate material.
As described above, a variety of performances are required for a hand warmer fabric, and a nonwoven fabric is generally used as the fabric for achieving the required quality.
For example, Patent Document 1 discloses a nonwoven fabric comprising polyester fibers, polyamide fibers, and the like as nonwoven fabrics. From the viewpoint of flexibility, polyamide fibers are preferred from the viewpoint of dimensional stability, rigidity and heat resistance, Based fibers are preferable. Further, it is described that a nonwoven fabric is preferably a long-woven nonwoven fabric from the viewpoint of strength and flexibility.
However, since the non-woven fabric using polyamide-based fibers uses a polyamide-based resin which is a relatively expensive raw material, it is difficult to control the price of the nonwoven fabric itself at a low cost and raises the price of the hand- There was a tendency to be lightened in consideration of the product location of the hand stove, which is called salting.
In addition, nonwoven fabrics using polyester fibers are inexpensive, and among them long filament nonwoven fabrics are mature in technique and can be manufactured at relatively low cost, but they are less flexible than nonwoven fabrics using polyamide fibers Have drawbacks. Therefore, there has been a tendency that the performance of the touch feeling required for the hand-warmer application can not be maintained.
Disclosed is a nonwoven fabric for a hand heater, which has flexibility, abrasion resistance, and required working properties, and which is excellent in operability and low cost, in a hand warmer nonwoven fabric.
Means for Solving the Problems The present inventors have made intensive studies to solve the above-mentioned problems, and have finally completed the present invention. That is, the present invention is as follows.
1. A long-fiber nonwoven fabric comprising polyester-based long fibers having a fineness of 0.5 to 5 dtex and having a weight per unit area of 15 to 60 g / m 2, an abrasion resistance of not less than grade 3, and a bending rigidity of 0.3 gf · cm 2 / Nonwoven fabric for hand heaters.
2. The hand burner according to 1 above, wherein the polyester based long fiber is a long fiber comprising polyethylene terephthalate and a copolymer thereof, or polybutylene terephthalate and a copolymer thereof, and a birefringence of the fiber is 0.04 to 0.15. Non-woven.
3. The nonwoven fabric for a hand heater according to 1 or 2 above, wherein the polyester-based long-fiber nonwoven fabric has a compression area ratio of 8 to 30% in the dot structure of the pressed fiber aggregate portion.
According to the present invention, a hand-warmable nonwoven fabric having an appropriate feel and excellent abrasion resistance can be obtained. Therefore, when used for a hand-stove application, since the softness is excellent and the touch is good and the abrasion resistance of the surface is excellent, It is possible to provide a nonwoven fabric for a hand stove capable of suppressing napping caused by rubbing. In addition, since polyester fibers can be produced by one-time thermocompression bonding, it is possible to provide a nonwoven fabric for a hand heater that is excellent in workability and also has a high cost-to-performance ratio.
The present invention relates to a nonwoven fabric for hand heaters, which is a nonwoven fabric comprising polyester based long fibers. The fiber material of the present invention is a polyester-based material which is a general-purpose thermoplastic resin that is inexpensive and excellent in mechanical properties. Polyolefin-based materials typified by polyethylene or polypropylene are not preferable because they are pressed from the nonwoven fabric having a small weight per unit area by the thermocompression to the backside of the pressing surface, failing to obtain a desired feel.
The polyester-based material of the present invention is preferably a polyester-based resin having a melting point of 220 캜 or higher and a glass transition temperature of 80 캜 or lower, and more preferably a polyester-based resin having a glass transition temperature of 70 캜 or lower. Examples of the polyester-based resin include homopolyester resins such as polyethylene terephthalate, polybutylene terephthalate and polytrimethylene terephthalate, and their copolymers and mixtures. As the most preferable polyester-based resin in the present invention, polyethylene terephthalate and its copolymerized polyester resin which are easy to form a state in which the surface of the sheet maintains abrasion resistance while maintaining a suitable feel. In the present invention, a modifying agent such as an antioxidant, an antioxidant, a colorant, an antibacterial agent and a flame retardant may be added as needed without deteriorating the properties.
The weight per unit area of the nonwoven fabric of the present invention is 15 to 60 g / m 2, preferably 20 to 50 g / m 2, and preferably 25 to 45 g / m 2. If the weight per unit area is smaller than 15 g / m 2, the strength as a nonwoven fabric becomes excessively low, so that the basic performance of a hand-warmer application in which the heat-radiating agent is wrapped can not be maintained. If it is larger than 60 g / m 2, even if the crimp adjustment is carried out, since the weight per unit area is high, the stiff feeling can not be eliminated and the glazing is deteriorated.
The fineness of the polyester-based long fibers constituting the nonwoven fabric of the present invention is 0.5 to 5 dtex, preferably 1 to 4 dtex, and more preferably 1.5 to 3.5 dtex. When the fineness is smaller than 0.5 dtex, the fiber diameter is small. When the nonwoven fabric having a weight per unit area in the above-mentioned range is produced, the number of strands constituting the fiber increases and, as a result, . In addition, when the fiber diameter is small, the radioactivity at the time of producing the long-fiber nonwoven fabric tends to be deteriorated, causing various problems such as yarn breakage, leading to an increase in cost due to deterioration in operability. When the amount of the nonwoven fabric is larger than 5 dtex, the fiber diameter becomes larger. Therefore, when a nonwoven fabric having a weight per unit area in the above range is produced, the number of strands constituting the fiber is decreased and the contact points of the fibers are decreased. As a result, there is a high possibility that the desired wear resistance will not be obtained.
The preferable abrasion resistance of the nonwoven fabric of the present invention is not less than grade 3 in the measuring method in the 100 times of the Japan Academic Promotion Association. When the abrasion resistance is less than grade 3, when the number of rubbing waiting times is increased when used as a hand stove, it causes a fluff diary, which results in deterioration of the user's feel and further changes in heat transfer state.
The preferred feel of the nonwoven fabric of the present invention has a flexural rigidity of 0.3 gf · cm 2 / cm or less in KES measurement. When the flexural rigidity is larger than 0.3 gf · cm 2 / cm, the stiffness of the stiffness when used as a hand stove is strong, which is burdened by the user and is not desirable as a stove burner application. A more preferable feel is the bending rigidity of 0.25 gf · cm 2 / cm or less. The lower limit of the bending rigidity is not particularly limited, but is preferably 0.05 gf · cm 2 / cm or more, which is a bending rigidity value of a normally obtained nonwoven fabric.
In order to satisfy the above-mentioned abrasion resistance and feel in the nonwoven fabric of the present invention, it is preferable to partially form the pressed fiber aggregate portion by thermocompression bonding by thermocompression bonding of the nonwoven fabric during the manufacturing process by a pair of heat rolls Do. It is more preferable that one roll of the pair of heat rolls is provided with a piece.
When both sides of the pair of heat rolls are roll rolls, the pressing is too strong and a proper feel can not be obtained. On the other hand, when both sides of the pair of heat rolls are flat rolls, the pressure bonding is too weak to achieve the desired wear resistance.
Further, in the present invention, a pressed fiber aggregate is partially formed and thermocompression is performed under conditions different from ordinary thermocompression processing conditions in order to satisfy the abrasion resistance and feel. One of the pair of thermosetting rolls is a thermosetting roll which is engraved with a convex pattern and the other is a thermosetting roll having a flat surface. Further, the temperature of the engraved roll surface is set at a high temperature of (melting point -60) DEG C to melting point of the polyester-based raw material (preferably 200 DEG C to 260 DEG C when the polyester raw material is polyethylene terephthalate) It is necessary to set the temperature of the roll surface at a low temperature of from (melting point -160) DEG C to (melting point -80) DEG C (preferably 100 DEG C to 180 DEG C when the polyester raw material is polyethylene terephthalate) of the polyester raw material have.
By setting one side to a high temperature and the other side to a low temperature in the above-mentioned temperature range, the nonwoven fabric can be obtained which has a smooth level of control of the feeling and a constant level of abrasion resistance.
In the nonwoven fabric of the present invention, the compression area ratio in the dot structure of the pressed fiber aggregate portion of the nonwoven fabric is preferably 8 to 30%. If it is less than 8%, the mechanical properties of the nonwoven fabric may not be satisfied, and if it exceeds 30%, the pressing may become too strong and the proper feel may not be maintained. More preferably, the compression area ratio is 10 to 25%, more preferably 12 to 25%.
In the nonwoven fabric of the present invention, it is preferable that the pressed area of the pressed fiber aggregate in the dot structure of the crimped fiber aggregate portion of the nonwoven fabric is 0.5 to 5 mm 2. If it is less than 0.5 mm < 2 >, the fixing effect of the long fibers is deteriorated and the structure retention property may be deteriorated. On the other hand, if it exceeds 5 mm 2, it may become hard and may not have a proper feel. More preferably, the crimped area of the crimped fiber aggregate of the dot structure is 0.8 to 2.5 mm 2, more preferably 1.0 to 2.0 mm 2.
In the nonwoven fabric of the present invention, the thickness of the pressed fiber aggregate portion of the dot structure of the pressed fiber aggregate portion of the nonwoven fabric is preferably 50 to 500 mu m. When the thickness is less than 50 mu m, the structure may be collapsed due to deformation. When the thickness exceeds 500 mu m, the flexibility may be lowered, resulting in a failure to have a proper touch. A more preferable thickness is 100 to 300 占 퐉, more preferably 150 to 250 占 퐉.
In the nonwoven fabric of the present invention, the ratio of the thickness of the pressed portion to the total thickness of the nonwoven fabric is preferably 5 to 50%. If it is less than 5%, the structural collapse or the function of the fiber binding point may be deteriorated due to the deformation, and if it exceeds 50%, it may become hard and it may not have a proper feeling. A more preferable compression ratio is 8 to 30%, and a more preferable compression ratio is 10 to 20%.
The shape of the partially compressed fiber aggregate portion described above is not particularly limited, but may be exemplified by a foot pattern, a diamond pattern, a square pattern, a glove pattern, an oval pattern, a plaid pattern, a polka dots pattern, a circle pattern and the like .
The nonwoven fabric of the present invention is a nonwoven fabric having an apparent density of 0.06 to 0.35 g / cm3. When the apparent density is less than 0.06 g / cm 3, the nonwoven fabric becomes bulky and it becomes difficult to obtain the required abrasion resistance. In addition, when the apparent density exceeds 0.35 g / cm3, the stiffness is increased, and deterioration of the glaze due to the hand specific to the hand stove is deteriorated. A more preferable apparent density is 0.1 to 0.33 g / cm 3.
In the nonwoven fabric of the present invention, when the polyester-based long-fiber constituting the nonwoven fabric is a long fiber including polyethylene terephthalate, polybutylene terephthalate and a copolymer thereof, in order to satisfy the mechanical properties of the nonwoven fabric, It is preferable to set the birefringence index n to at least 0.04 to 0.15. When the birefringence (? N) is less than 0.04, orientation crystallization is insufficient and the strength and shrinkage ratio are also high, resulting in poor stability of the nonwoven fabric characteristics and also failing to obtain a proper feel. On the other hand, fibers prepared in an ultra-high-speed radiation region having a birefringence (? N) of more than 0.15 are voided and degraded in strength, resulting in degradation of the mechanical properties of the nonwoven fabric. More preferably, the birefringence? N is 0.045 to 0.11, and more preferably 0.05 to 0.10. The fiber having a birefringence (Δn) of 0.05 to 0.10 is a region having a spinning speed of 4000 to 6500 m / min, which is the most favorable in productivity and can also satisfy the mechanical properties.
Hereinafter, an example of a method for producing a nonwoven fabric of the present invention will be described. Further, the present invention is not limited by this disclosure.
A production method using polyethylene terephthalate which is a preferable polyester-based long fiber in the present invention will be described below.
Polyethylene terephthalate having an intrinsic viscosity of 0.65 is dried, and subsequently, spinning is carried out by a melt-spinning machine by a conventional method. The discharge amount is set according to the set traction speed in order to obtain the desired fineness and required degree of orientation. For example, when it is desired to obtain fibers having a? N of 0.101 and a fineness of 2.0 dtex, the spinning speed is set to 5000 m / min and the single hole discharge amount is set to 0.7 g / min.
The spinning discharge yarn spinning is cooled by the cooling wind at a distance of 10 cm below the nozzle and is pulled down (thinned) and solidified by the pulling jet installed downward. The tow-spun long fibers are collected on a suction net conveyor installed on the lower side and are webized so that the weight per unit area of the desired nonwoven fabric is 20 to 60 g / m 2. Continuously or continuously, or thermocompression-processed in a separate process.
In the present invention, a pressed fiber aggregate is partially formed and thermocompression is performed under conditions different from ordinary thermocompression processing conditions in order to satisfy the feeling and abrasion resistance. That is, one of the pair of thermo-compression rolls is a thermo-compression roll in which a convex pattern is engraved, and the other is a thermo-compression roll having a flat surface. In the case of using polyethylene terephthalate, the slicing roll surface should be set at 200 ° C or higher and lower than 260 ° C, and in the case of using polyethylene terephthalate, the flat roll surface should be set at 100 ° C or higher and lower than 180 ° C. With respect to the weight per unit area of the desired nonwoven fabric, one side of the nonwoven fabric is maintained at a high temperature while the other side thereof is made low, whereby the nonwoven fabric can be controlled to a smooth level and the abrasion resistance can be maintained at a constant level.
In the present invention, the temperature of the roll surface should be balanced with the sheet feeding speed at the time of thermocompression bonding. For example, polyethylene terephthalate is used, and at a sheet feeding speed of 10 m / min, 260 deg. C, and more preferably 220 deg. C to 250 deg. The surface temperature of the flat roll is set to, for example, polyethylene terephthalate at a feed rate of 10 m / min, preferably 100 to 170 ° C, and more preferably 120 to 150 ° C.
It is preferable that the line pressure of the compression bonding by these thermocompression rolls is 10 to 40 kN / m.
The nonwoven fabric obtained by thermocompression-bonding under the above-mentioned conditions is controlled to have a smooth level of texture and has a constant level of abrasion resistance.
In the present invention, since the compression area ratio of the partially pressed fiber aggregate is preferably 10 to 30%, it is preferable to use a dot-shaped engraved pattern in which the area of the convex compression face is 10 to 30%. In the present invention, the shape of the dot is not particularly limited, but an elliptical pattern, a diamond pattern, a weave pattern of a fabric, and the like can be exemplified as preferable patterns.
The thus obtained nonwoven fabric of the present invention is cut into a predetermined shape to laminate the laminate material bonded to the film with the film surface inwardly and the periphery is thermally fused to form a bag shape and a heating element for hand heaters After filling, the remaining openings were heat-sealed again to produce a hand-stove product. As a result, the finished hand warmer has a good feel, has a certain level of abrasion resistance, and is excellent in handling even when hand rubbed properly while the user is exothermic.
<Examples>
Hereinafter, the present invention will be described in more detail with reference to examples and comparative examples, but the present invention is not limited thereto at all. The evaluation methods used in Examples and Comparative Examples of the present invention were carried out by the following methods.
(1) islands [dtex]
Five points at arbitrary positions of the sample were selected, and the short fiber diameter was measured at n = 20 using an optical microscope to obtain the total average value (D). Five fibers in the same place were taken out, and the specific gravity of the fibers was measured with n = 5 using a density gradient pipe to obtain the total average value p. Subsequently, the fineness [dtex], which is the fiber weight per 10000 m, was determined from the cross-sectional area and the average specific gravity of the single fiber determined from the average single fiber diameter.
(2) Birefringence index (? N)
Twenty arbitrary points were selected and short fibers were taken out from the nonwoven fabric and used as a sample. The fiber diameter and phase difference were read using a Nikon polarization microscope OPTIPHOT-POL type (each sample n = 5) Was obtained.
(3) Weight per unit area [g / m 2]
Measured according to JIS L1906 (2000) 5.2 mass per unit area.
(4) Thickness [mm]
According to JIS L1906 (2000) 5.1 thickness, the load was measured at a load of 19.6 cN / cm 2 (20 gf / cm 2).
(5) Apparent density [g / cm3]
The weight and thickness per unit area measured in the above (2) and (3) were calculated using the following mathematical expression.
Apparent density = weight per unit area ÷ (thickness × 1000)
(6) Abrasion resistance [grade]
The nonwoven fabric was used as a sample, the cannula No. 3 was used as the friction bubble, and a load of 500 gf (tensile force) was measured using a friction stir welding machine And rubbing with a reciprocating number of times of 100 reciprocations. The napping and worn state of the surface of the nonwoven fabric were evaluated by naked eye determination based on the following criteria (average value of n = 5).
Level 0: Large damage
Level 1: Damage Medium
Level 2: Damage small
Class 3: No damage, slight lint
Level 4: No damage, lint occurs.
Grade 5: No damage, no fluff
(7) Texture (flexural rigidity) [gf · cm 2 / cm]
(KAWABATAS EVALUATION SYSTEM-2 PURE BENDING TESTER) manufactured by Kato-Tech Co., Ltd. was used. The specimen was 10 cm long and the specimen was held on a chuck having a gap of 1 cm. in the range of + -1 2.5㎝, subjected to simple bending test with a deformation rate of 0.50 (㎝ -1), was determined to bending rigidity (B).
(8) Melting point
5 mg of a sample of the resin was sampled and the temperature at the endothermic peak position was measured as a melting point when the sample was heated from 20 占 폚 to 10 占 폚 / min at 300 占 폚 under a nitrogen atmosphere using a differential scanning calorimeter (Q100 manufactured by TA Instruments Co., Ltd.) .
<Squeeze area ratio of nonwoven fabric>
Cut at arbitrary 20 points at a side of 30 mm, and photograph 50 times by SEM. Printing the photographed pictures to the A3 size to cut out the compression unit area, calculate the surface area (S 0). Subsequently, only the crimped portion is cut out within the crimped unit area to obtain the crimped portion area (S p ), and the crimped area ratio (P) is calculated. And an average value of 20 points of the compression area ratio (P) was obtained.
≪ Example 1 >
Polyethylene terephthalate (hereinafter abbreviated as " PET ") having an intrinsic viscosity of 0.65 was melt-spun at a spinning temperature of 285 DEG C and a single hole discharge rate of 0.7 g / min using a spunbond spinning facility and spinning at a spinning speed of 5000 m / And collected on a net conveyor to obtain a long-fiber web having a weight per unit area of 30 g / m 2 including long fibers having a single yarn fineness of 2.0 dtex and a birefringence (Δn) of 0.101. Subsequently, a pair of thermocompression rolls composed of a flake roll and a flat roll of a convex elliptic pattern having a compression area ratio of 18% were used, and the surface temperature of the flake roll was 250 ° C, the surface temperature of the flat roll was 150 ° C, The web was thermally pressed at a pressure of 40 kN / m under compression to obtain a nonwoven fabric having a weight per unit area of 30 g / m 2. The obtained nonwoven fabric had an apparent density of 0.158 g / cm 3, a wear resistance of 4 and a flexural rigidity of 0.11 gf · cm 2 / cm, and was a nonwoven fabric having good abrasion resistance and feeling.
≪ Example 2 >
A long-fiber nonwoven fabric was obtained in the same manner as in Example 1 except that the speed of the conveyor net was adjusted so that the weight per unit web area was 45 g / m 2. The obtained nonwoven fabric had an apparent density of 0.190 g / cm 3, a wear resistance of 4 and a flexural rigidity of 0.15 gf · cm 2 / cm, and was a nonwoven fabric having good abrasion resistance and feel.
≪ Example 3 >
A long-fiber nonwoven fabric was obtained in the same manner as in Example 1, except that the surface temperature of the engraving roll subjected to thermocompression was 240 캜 and the surface temperature of the flat roll was 160 캜. The obtained nonwoven fabric had an apparent density of 0.155 g / cm 3, a wear resistance of 4, and a flexural rigidity of 0.10 gf · cm 2 / cm, and was a nonwoven fabric having good abrasion resistance and feel.
<Example 4>
A long-fiber nonwoven fabric was obtained in the same manner as in Example 1 except that the monofilament fineness was changed to 3.5 dtex. The obtained nonwoven fabric had an apparent density of 0.173 g / cm 3, a wear resistance of grade 3, and a flexural rigidity of 0.10 gf · cm 2 / cm, and was a nonwoven fabric having good abrasion resistance and feel.
≪ Example 5 >
A long-fiber nonwoven fabric was obtained in the same manner as in Example 1, except that the speed of the conveyor net was adjusted so that the weight per unit web area was 60 g / m 2. The obtained nonwoven fabric had an apparent density of 0.200 g / cm 3, a degree of wear resistance of 4, and a flexural rigidity of 0.25 gf · cm 2 / cm, and was a nonwoven fabric having good abrasion resistance and feeling.
≪ Example 6 >
A long-fiber nonwoven fabric was obtained in the same manner as in Example 1, except that the speed of the conveyor net was adjusted so that the weight per unit web area was 25 g / m 2. The obtained nonwoven fabric had an apparent density of 0.142 g / cm 3, a degree of abrasion resistance of 4, and a flexural rigidity of 0.10 gf · cm 2 / cm, and was a nonwoven fabric having good abrasion resistance and feeling.
≪ Example 7 >
A long-fiber nonwoven fabric having a compression area ratio of 27% in the partially pressed fiber aggregate portion was obtained in the same manner as in Example 1, except that the dot pattern area ratio of the engraving roll subjected to thermo-compression was 25%. The obtained nonwoven fabric had an apparent density of 0.187 g / cm 3, a degree of abrasion resistance of 5, and a flexural rigidity of 0.24 gf · cm 2 / cm, and was a nonwoven fabric having good abrasion resistance and feel.
≪ Example 8 >
Polybutylene terephthalate (hereinafter abbreviated as "PBT") having an intrinsic viscosity of 0.92 was melt-spun at a spinning temperature of 260 ° C and a single hole discharge rate of 0.7 g / min using a spunbond spinning facility, spinning at a spinning speed of 5000 m / min And collected on a net conveyor to obtain a long-fiber web having a weight per unit area of 30 g / m 2 including a long fiber having a single fiber diameter of 2.0 dtex and a birefringence (Δn) of 0.095.
Then, a pair of thermocompression rolls composed of a flake roll and a flat roll having a convex elliptic pattern with a compression area ratio of 18% were used. The surface temperature of the flake roll was set to 230 캜, the surface temperature of the flat roll was set to 140 캜, The web was thermally pressed at a pressure of 40 kN / m under compression to obtain a nonwoven fabric having a weight per unit area of 30 g / m 2. The obtained nonwoven fabric had an apparent density of 0.147 g / cm 3, a wear resistance of 5, and a flexural rigidity of 0.11 gf · cm 2 / cm, and was a nonwoven fabric having good abrasion resistance and feel.
≪ Comparative Example 1 &
A long-fiber nonwoven fabric was obtained in the same manner as in Example 1, except that the thermo-compression process was not performed. The obtained nonwoven fabric had an apparent density of 0.070 g / cm 3, a wear resistance of the first grade, and a flexural rigidity of 0.06 gf · cm 2 / cm, which was not preferable as a nonwoven fabric for hand heaters.
≪ Comparative Example 2 &
A long-fiber nonwoven fabric was obtained in the same manner as in Example 1 except that the surface temperature of both the flake roll and the flat roll subjected to thermo-compression was set to 250 ° C. The resultant nonwoven fabric had an apparent density of 0.198 g / cm 3, a wear resistance of 5, and a flexural rigidity of 0.38 gf · cm 2 / cm.
≪ Comparative Example 3 &
A long-fiber nonwoven fabric was obtained in the same manner as in Example 1 except that a pair of thermocompression rolls subjected to thermocompression processing were changed to flat rolls and subjected to thermocompression bonding. The obtained nonwoven fabric had an apparent density of 0.131 g / cm 3, a wear resistance of the second grade, and a flexural rigidity of 0.10 gf · cm 2 / cm, which was not preferable as a nonwoven fabric for hand heaters.
≪ Comparative Example 4 &
A long-fiber nonwoven fabric was obtained in the same manner as in Example 1 except that a pair of thermocompression rolls subjected to thermocompression processing were changed to a roll roll and subjected to thermocompression bonding. The resultant nonwoven fabric had an apparent density of 0.220 g / cm 3, a wear resistance of 4, and a bending stiffness of 0.36 gf · cm 2 / cm, and was not preferable as a nonwoven fabric for hand heaters because of insufficient flexibility.
≪ Comparative Example 5 &
A long-fiber nonwoven fabric was produced in the same manner as in Example 1 except that the surface temperature of the engraving roll subjected to the thermocompression forming process was changed to 265 ° C. As a result, , The nonwoven fabric was fused to the piece roll, and a normal sheet-like nonwoven fabric could not be obtained.
≪ Comparative Example 6 >
A long-fiber nonwoven fabric was obtained in the same manner as in Example 1, except that the surface temperature of the engraving roll subjected to the thermo-compression process was changed to 190 캜. The obtained nonwoven fabric had an apparent density of 0.130 g / cm 3, a wear resistance of the second grade, and a flexural rigidity of 0.09 gf · cm 2 / cm, which were not preferable as handheld nonwoven fabrics.
≪ Comparative Example 7 &
A long-fiber nonwoven fabric having a compression area ratio of 37% in a partially pressed fiber aggregate portion was obtained in the same manner as in Example 1, except that the dot pattern area ratio of the engraving roll subjected to thermo-compression was 35%. The resultant nonwoven fabric had an apparent density of 0.218 g / cm 3, a wear resistance of 5, and a bending stiffness of 0.35 gf · cm 2 / cm, which were unsuitable as handheld nonwoven fabrics.
≪ Comparative Example 8 >
A long-fiber nonwoven fabric was obtained in the same manner as in Example 1, except that the melt-spun yarn was drawn at a spinning speed of 3000 m / min and collected on a net conveyor to obtain a fiber having a birefringence (? N) of 0.03. The resultant nonwoven fabric had an apparent density of 0.229 g / cm 3, a wear resistance of 5, and a flexural rigidity of 0.39 gf · cm 2 / cm, which were not preferable as handheld nonwoven fabrics.
≪ Comparative Example 9 &
A long-fiber nonwoven fabric was obtained in the same manner as in Example 1 except that the surface temperature of the engraving roll subjected to the thermocompression process and the surface temperature of the flat roll were both 220 캜. The resultant nonwoven fabric had an apparent density of 0.150 g / cm 3, a wear resistance of 1 st grade, and a flexural rigidity of 0.10 gf · cm 2 / cm, which were not preferable as handheld nonwoven fabrics.
≪ Comparative Example 10 &
A long-fiber nonwoven fabric was obtained in the same manner as in Example 1 except that the surface temperature of the engraving roll subjected to the thermocompression process and the surface temperature of the flat roll were both 170 占 폚. The resultant nonwoven fabric had an apparent density of 0.129 gf / cm 3, a wear resistance of the first grade, and a flexural rigidity of 0.07 g · cm 2 / cm, which were not preferable as handheld nonwoven fabrics.
≪ Comparative Example 11 &
A long-fiber nonwoven fabric was obtained in the same manner as in Example 1 except that the weight per unit area of web was 70 g / m 2. The resultant nonwoven fabric had an apparent density of 0.212 g / cm 3, a wear resistance of 4, and a bending stiffness of 0.34 gf · cm 2 / cm, which were unsuitable as handheld nonwoven fabrics.
INDUSTRIAL APPLICABILITY According to the present invention, it is possible to obtain a hand-warmable nonwoven fabric having a suitable feel and excellent abrasion resistance. Therefore, when used for a hand-stove application, since the softness is excellent and the abrasion resistance of the surface is excellent, It is possible to provide a nonwoven fabric for a hand stove capable of suppressing napping caused by rubbing with a hand of a hand warmer. Further, since the polyester fiber can be produced by one-time thermocompression bonding, it is possible to provide a nonwoven fabric for a hand-warmer which is excellent in workability and excellent in cost to performance ratio, Big.
Claims (3)
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2012002861A JP5935327B2 (en) | 2012-01-11 | 2012-01-11 | Non-woven for Cairo |
| JPJP-P-2012-002861 | 2012-01-11 | ||
| PCT/JP2013/050257 WO2013105586A1 (en) | 2012-01-11 | 2013-01-10 | Non-woven fabric for use in disposable body warmer |
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| Publication Number | Publication Date |
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| KR20140109418A true KR20140109418A (en) | 2014-09-15 |
| KR102011536B1 KR102011536B1 (en) | 2019-08-16 |
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| KR1020147018879A KR102011536B1 (en) | 2012-01-11 | 2013-01-10 | Non-woven fabric for use in disposable body warmer |
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| JP (1) | JP5935327B2 (en) |
| KR (1) | KR102011536B1 (en) |
| CN (1) | CN104066879B (en) |
| WO (1) | WO2013105586A1 (en) |
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| JP6428998B2 (en) * | 2014-04-07 | 2018-11-28 | 東洋紡株式会社 | Vehicle seat back material |
| JP6715082B2 (en) * | 2016-05-23 | 2020-07-01 | 旭化成株式会社 | Non-woven fabric with excellent heat resistance and durability and high strength |
| JP6976698B2 (en) * | 2017-03-14 | 2021-12-08 | 旭化成株式会社 | Long-fiber non-woven fabric for body warmers and disposable body warmers using this |
| WO2020066622A1 (en) * | 2018-09-28 | 2020-04-02 | 東レ株式会社 | Spunbond nonwoven fabric |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH06184856A (en) * | 1992-06-02 | 1994-07-05 | Kanebo Ltd | Low air-permeable woven fabric and its production |
| JP2007107125A (en) * | 2005-10-12 | 2007-04-26 | Toyobo Co Ltd | Spun-bond non-woven fabric |
| JP2009197385A (en) | 2009-06-01 | 2009-09-03 | Asahi Kasei Fibers Corp | Method for producing nonwoven fabric for disposable warmer |
| JP2009225975A (en) * | 2008-03-21 | 2009-10-08 | Toyobo Co Ltd | Nonwoven fabric for heating implement, and heating implement using the same |
| JP2011231446A (en) * | 2010-04-09 | 2011-11-17 | Toyobo Co Ltd | Filament nonwoven fabric with excellent flexibility,abrasion resistance and heat sealability |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| JP4122182B2 (en) * | 2002-06-28 | 2008-07-23 | 旭化成せんい株式会社 | Non-woven fabric for disposable warmers and disposable warmers with excellent printability |
| CN100526525C (en) * | 2006-07-25 | 2009-08-12 | 常熟市长江化纤有限公司 | Method for direct preparation of fiber product from polylactic acid polymerized melt |
| JP5191256B2 (en) * | 2008-03-21 | 2013-05-08 | 旭化成せんい株式会社 | Low weight nonwoven fabric |
| CN101476213B (en) * | 2009-01-20 | 2012-12-05 | 陈超 | Process for manufacturing regenerative PET spun bonded fabric |
-
2012
- 2012-01-11 JP JP2012002861A patent/JP5935327B2/en active Active
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2013
- 2013-01-10 WO PCT/JP2013/050257 patent/WO2013105586A1/en active Application Filing
- 2013-01-10 CN CN201380005371.2A patent/CN104066879B/en active Active
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Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH06184856A (en) * | 1992-06-02 | 1994-07-05 | Kanebo Ltd | Low air-permeable woven fabric and its production |
| JP2007107125A (en) * | 2005-10-12 | 2007-04-26 | Toyobo Co Ltd | Spun-bond non-woven fabric |
| JP2009225975A (en) * | 2008-03-21 | 2009-10-08 | Toyobo Co Ltd | Nonwoven fabric for heating implement, and heating implement using the same |
| JP2009197385A (en) | 2009-06-01 | 2009-09-03 | Asahi Kasei Fibers Corp | Method for producing nonwoven fabric for disposable warmer |
| JP2011231446A (en) * | 2010-04-09 | 2011-11-17 | Toyobo Co Ltd | Filament nonwoven fabric with excellent flexibility,abrasion resistance and heat sealability |
Also Published As
| Publication number | Publication date |
|---|---|
| CN104066879B (en) | 2016-12-21 |
| CN104066879A (en) | 2014-09-24 |
| JP2013142207A (en) | 2013-07-22 |
| JP5935327B2 (en) | 2016-06-15 |
| WO2013105586A1 (en) | 2013-07-18 |
| KR102011536B1 (en) | 2019-08-16 |
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