CN1139680C - Elastic filament used for hygienic articles - Google Patents

Elastic filament used for hygienic articles Download PDF

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Publication number
CN1139680C
CN1139680C CNB001080695A CN00108069A CN1139680C CN 1139680 C CN1139680 C CN 1139680C CN B001080695 A CNB001080695 A CN B001080695A CN 00108069 A CN00108069 A CN 00108069A CN 1139680 C CN1139680 C CN 1139680C
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elastomer yarn
strand
section
cross
amenities
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CN1278025A (en
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岩田浩介
之
大桥英之
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Toyobo Co Ltd
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Toyobo Co Ltd
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    • 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
    • D01F6/58—Monocomponent artificial filaments or the like of synthetic polymers; Manufacture thereof from homopolycondensation products
    • D01F6/70—Monocomponent artificial filaments or the like of synthetic polymers; Manufacture thereof from homopolycondensation products from polyurethanes
    • D—TEXTILES; PAPER
    • D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
    • D01D—MECHANICAL METHODS OR APPARATUS IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS
    • D01D4/00—Spinnerette packs; Cleaning thereof
    • D01D4/02—Spinnerettes
    • D—TEXTILES; PAPER
    • D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
    • D01D—MECHANICAL METHODS OR APPARATUS IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS
    • D01D5/00—Formation of filaments, threads, or the like
    • D01D5/04—Dry spinning methods

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  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • General Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Spinning Methods And Devices For Manufacturing Artificial Fibers (AREA)
  • Yarns And Mechanical Finishing Of Yarns Or Ropes (AREA)
  • Artificial Filaments (AREA)
  • Treatments For Attaching Organic Compounds To Fibrous Goods (AREA)

Abstract

The object of the invention is to simultaneously raise the adhesion of an elastic yarn to a substrate while maintaining unwinding properties of the elastic yarn. This multifilament elastic yarn is obtained by dry spinning an elastic polymer and has a flat cross section of >=2 ratio (Ll/Ls) of the long side (Ll) to the short side (Ls) of a rectangle circumscribed with the filament cross section of the elastic yarn. Furthermore, unevennesses are preferably formed by an outer shape of the single filaments on the surface of the elastic yarn and the length ratio (L1/L2) of the perimeter (L1) of the rectangle circumscribed with the filament cross section of the elastic yarn to the perimeter (L2) of the filament cross section of the elastic yarn has <=0.9 degree of the unevennesses.

Description

The elastomer yarn that is used for amenities
A kind of elastomer yarn that the present invention relates to is used to produce amenitiess such as paper diaper, physiological napkin.What be particularly related to is the elastomer yarn that can keep good adhesion with the primer that uses binding agent.
In recent years, manyly be developed as amenitiess such as paper diaper, physiological napkins, people are strict more to the quality requirement of this commodity.In order to improve this class amenities and to use the anastomose property at its position, people are spun into elasticity multi-fibre silk thread with elastomeric polymer, and make it have retractility.With cloth brocade, nonwoven fabric or felt-cloth etc. is that the amenities of primer has retractility for making its some position, uses binding agent to adhere mutually with elastomer yarn usually.
The elastomer yarn of using in the amenities, normally make the elastomer yarn curled hair body that is the cheese state while uphold separate easypro, simultaneously it is guided to cloth brocade, nonwoven fabric or the felt-cloth etc. that scribble binding agent and locate, it is adhered mutually by exerting pressure to bonding plane.
The elastomer yarn that is used for amenities makes amenities have linearity by extension, and mutually bonding with primers such as cloth brocade, nonwoven fabric or felt-cloths with binding agent.Through extension elastomer yarn after bonding with the adhesion strength of primer as abundant inadequately, elastomer yarn can be peeled off, shrink from primer, thereby makes the elastic yarn of the amenities of having produced produce retraction, and its product quality is worsened.
Be rolled into the elastomer yarn of cheese shape, roll up, therefore in the operation of producing amenities, problems such as fracture of wire or feeding tension variation can take place because layer is tight within it.Institute thinks and prevents that easy zbility from worsening, tension change, will carry out surperficial finish usually and handle.
When this elastomer yarn is adhered with primers such as cloth brocade, nonwoven fabric, abundant inadequately as adherence, will produce the problems referred to above thereupon.
The amount of being coated with that reduces finish for the adherence of avoiding elastomer yarn reduces, and the easy zbility of elastomer yarn is worsened, thereby can produce the problem of fracture of wire and feeding tension change in the production process of amenities.
Otherwise the amount of being coated with that increases binding agent for the adherence that improves elastomer yarn can increase the cost of product, can damage the aeration of amenities simultaneously and with the problem of air loose contact.
The objective of the invention is to overcome the defective that above-mentioned prior art exists and a kind of elastomer yarn that is used for amenities is provided, make it when keeping the elastomer yarn easy zbility, improve adhesive performance primer.
For solving above problem, the inventor is through research, found that elastomer yarn in the amenities is the problem of primer with the elastomer yarn contact area with the problem of primer loose contact in fact, by can when keeping easy zbility, improving adherence again, and be found to be the basis and finished the present invention with this to the nemaline change of elastic yarn.
The details of invention is as follows:
(1) elastomeric polymer is obtained elasticity multi-fibre silk thread by dry type spinning method.This elasticity multi-fibre silk thread that is used for amenities has flat cross section, i.e. the external long limit L of rectangle in elasticity strand cross section 1Length is minor face L sLength L 1/ L sMore than 2 times.
(2) the elasticity multi-fibre silk thread of describing in above-mentioned (1), its surface forms concavo-convex state by the monofilament cross section that constitutes strand, and the ratio L1/L2 of the perimeter L 1 of elasticity strand cross section bounding rectangle and elasticity strand perimeter of section L2 is below 0.9.
(3) the elastomer yarn surface described in above-mentioned (1) or (2) scribbles finish, and the amount of being coated with of this finish is 0.01～5% with the ratio of strand weight.
(4) above-mentioned (1)～(3) the described elastomer yarn of fineness within 155～2490 dtex scopes.
(5) elastomeric polymer of the production elastomer yarn described in the item of above-mentioned (1)～(4) is meant polyurethane.
The long limit L of rectangle that the elasticity strand cross section of being mentioned among the present invention is external 1With minor face L sBe elastomer yarn to be fixed on the operation post with two-sided tape, with the shaver blade with the weight of 490cN along elastomer yarn length direction perpendicular cuts, with magnifying glass its cross section is amplified again and takes pictures, the result that long limit of elastomer yarn cross section bounding rectangle and minor face are measured in the comparison film.
The rectangular perimeter L1 that elastomer yarn strand cross section is external and the girth of elastomer yarn are meant the girth in elastomer yarn cross section in rectangular perimeter that elastomer yarn cross section in the above-mentioned photo is external and the photo.
In addition, when there is a plurality of bounding rectangle in elastomer yarn on the photo, adopt L 1/ L sThe rectangle of ratio maximum.
Can be clear and definite by above explanation, health product elastomer yarn of the present invention, its bonding force that scribbles the primer of bonding agent has improved manyly than existing, and the easy zbility of cheese shape filament is also very good.Therefore, can produce the high-quality amenities that does not bounce back reliably.
The present invention is described in detail below in conjunction with accompanying drawing.
Fig. 1 is a pattern legend of production elastomer yarn equipment therefor of the present invention.
Fig. 2 is the spinning bayonet socket details drawing of Fig. 1 device.
Fig. 3 is other pattern legend of production elastomer yarn equipment therefor of the present invention.
Fig. 4 leads the material details drawing for the U font of Fig. 3 device.
Fig. 5 is the manufacturing installation ideograph of existing production elastomer yarn.
Amenities elastomer yarn of the present invention is the long limit L of elasticity strand cross section bounding rectangle1Length and minor face LsLength Ratio L1/L sIt is the elasticity multifilament silk thread with flat cross section more than 2.
The existing elastomer yarn that is used for amenities with the production of dry type spinning method, normally in the pore injection spinning can of solution by the spinning bayonet socket with elastomeric polymer, weld with a plurality of monofilament interlacings and along the fibre length direction with simple and easy twisting frame, thereby produce the strand that conforms with the target danier. Even if the elastomer yarn that this method is produced is flat, the ratio of the long limit of its strand cross section bounding rectangle and minor face does not reach 2 yet. The ratio (long limit/minor face) of the long limit of elastomer yarn strand of the present invention cross section bounding rectangle and minor face is more than 2, has very high flatness, because it is many that these characteristics make the contact area (comparison under the same fineness condition) of amenities primer increase than existing elastomer yarn, thereby improved tackability. With elastomer yarn of the present invention during for the production of urine pants, owing to have very high flatness, thus increased the bonded area of amenities and the person, thus the ability that prevents that excreta from revealing improved, alleviated constriction by dispersion folder power simultaneously.
Elastomer yarn of the present invention, the long limit L of rectangle that its strand cross section is external1With minor face LsLength Ratio L1/L sLarger, just higher with the adhesion strength of primer. Will present greatly the tendency that cheese shape filament easy zbility can reduce but ratio is undue. Therefore its ratio is optimum between 2～8.
The method of production elastomer yarn of the present invention does not have special restriction. For example can adopt following method.
Existing dry type spinning method is that all monofilament that the spinning bayonet socket is extruded are all carried out the interlacing operation with simple and easy twisting frame. Do not do as stated above now, the monofilament that we extrude bayonet socket between spinning can and coiling machine with leading the material friction and welding leading the material upper set. So just can obtain the strand of high flatness. Here the binding that monofilament can be gathered does not all have particular restriction with shape and the material of leading material. For example can be with the material with U font guide channel or circular guide hole. Especially the inner face at circular guide hole can make the monofilament friction and produce stable flat cross section along the strand length direction, and this kind situation is ideal. In addition, rather well received at the material ceramic material aspect the contact friction of strand that reduces to lead material. The diameter of leading the material circular hole of dredging strand at above-mentioned circular hole inner face is suitable between 1～15mm, is best between 2～5mm. Although also change with the fineness of elastomer yarn and the difference of radical, when the discontented 1mm of diameter of circular hole, the frictional force of circular hole inner face increases, and long-time spinning will be easy to cause fracture of wire; The diameter of circular hole is during greater than 15mm, and the contact between the monofilament is abundant not, might stably weld along the strand length direction.
Other method as production elastic yarn of the present invention, for example a plurality of monofilament of extruding from bayonet socket can be divided into the colony more than 2, the monofilament of each colony forms strand more than 2 in interlacing on the twisting frame, afterwards with the strand more than 2 with leading the material friction and welding the strand that forms the target fineness leading material.
When adopting above-mentioned several method, spun whole monofilament and disunity interlacing, but by leading material upper set strand, thus realize the welding with integrated of whole monofilament, therefore be easy to produce the long limit L of strand cross section bounding rectangle1With minor face LsLength Ratio L1/L sBe the very high flat cross section of flatness more than 2, and strand surface form by monofilament surface consist of concavo-convex. Especially the strand that the method before is produced owing to do not produce interlacing fully between the monofilament, so the strand surface by monofilament surface form concavo-convex very obvious. The strand surface area that namely forms by cross section flattening and concave-convex surface enlarges, so that compare with existing elastomer yarn, and the contact area of binding agent (comparison under the same fineness condition) has had tremendous expansion. And the surface area of the higher strand of camber on strand surface is just larger, just more can improve tackability. Therefore, the concavo-convex degree that represents with the ratio L1/L2 of strand perimeter of section L2 with strand cross section bounding rectangle girth L1 is advisable when following 0.9, and 0.85 is better when following, and 0.80 is best when following. But the camber on strand surface is healed and is welded just more weakly between the high monofilament, and monofilament is easier fork just, so above-mentioned length ratio L1/L2 is preferably more than 0.4.
In above-mentioned illustrative method, when producing elastomer yarn of the present invention, use the ratio B/A apart from B that leads between the material to be advisable greater than 10 o'clock apart from the size A between spinning bayonet socket pore farthest with from the spinning bayonet socket to binding. B/A is less than 10 o'clock, enter the monofilament angle of leading material and become large, thereby easily because of with lead the material friction and produce fracture of wire.
Elastomer yarn fineness of the present invention is not done particular determination, is generally 155～2490 dtexs (140～2240 danier), is desirably 470～940 dtexs (420～840 danier). The fineness of monofilament is generally 9～22 dtexs (8～20 danier), is desirably 11～17 dtexs (10～15 danier). The cross section of monofilament can be circular in addition, also other shape.
Elastomer yarn of the present invention is batched final formation cheese shape with coiling machine, obtains good easy zbility for making silk thread, will be coated with finish before coiling machine batches. The amount of being coated with of finish should be between 0.01～5% with the ratio of strand weight. Keep above-mentioned scope can make strand have good adherence and easy zbility.
The amount of being coated with of above-mentioned finish is measured by the following method. The weight of filament is X when in the situation that is not coated with finish the elasticity strand correctly being batched 20000M with winding wheel, and the weight of filament is Y when under being coated with the situation of finish the elasticity strand correctly being batched 20000M with winding wheel.
The weight of the finish amount of being coated with (%)={ (weight of filament Y)-(weight of filament X) }/filament X * 100
Elastomeric polymer as multifilament elastomer yarn raw material of the present invention, can use polyurethane, polymerizable alkenyl elastomer, polyester elastomer, synthetic rubber etc., see that from having strength and elongation, the physical property such as restorative and durable this angle of physical and chemical performance polyurethane is especially welcome. Certainly also the elastomeric polymer more than 2 kinds can be mixed and use.
When using polyurethane, our usefulness be the co-polymerization body of organic polymer with diisocyanate, or carry out this condensate of chain elongation through amines.
Organic polymer can be enumerated many kinds, such as being the polytrimethylene ether organic polymer of representative with the polymerization butanediol; With the polyethylene is the polyester organic polymer of representative; With second lactones sheep oil lactone or as the polyester alcohol of second lactones sheep oil lactone and the reactant of thiazolinyl carbonate is the polyester carbonate organic polymer of example; The rare carbonate of second is reacted the organic polymer of organic Xiang acid reaction gained such as the same again adipic acid of the mixture that is produced, azelaic acid, certain herbaceous plants with big flowers diacid with polyalcohols such as the rare alcohol of second, propenyl, butenol, chlorobenzyl alcohols.Among these polymer, from having strength and elongation, rerum natura and durable physical and chemical performance such as restorative, especially have excellent in water resistance can angle see that to use polytrimethylene ether organic polymer effect quite good.These polymer can use a kind of, also can use mixing more than 2 kinds certainly.
From keeping the flexible continuity angle of elastomer yarn, the molecular weight of organic polymer should be between 1000～4000, and molecular weight effect when 1500～2300 scopes is best.
Can be listed below as diisocyanate, such as 4,4 '-diphenylmethane diisocyanate, 1,5-naphthalene diisocyanate, 1,4-benzene diisocyanate, 2,4-triolefin diisocyanate, 2, aromatic series diisocyanates such as 6-triolefin diisocyanate, six first diisocyanates, 1,4-cyclohexane diisocyanate, 4, aliphatic diisocyanates such as the own methane diisocyanate of 4 '-dicyclo, different dimethyl acetone diisocyanate.Among these kinds, from improving the angle of elastomer yarn intensity, use 4,4 '-diphenylmethane diisocyanate effect is for well.These diisocyanates can use wherein a kind of, also can use above the mixing in 2.
Usually use aliphatic, alicyclic or aromatic amine as amines.Specifically can be listed below, as vinylamine, 1,2 allylamines, 1,3 allylamine, 1,4 butenylamine, 2,3 butenylamines, 1,3 butenylamines, six methylamines, hexamethylene alkanamine, aniline, three enamines, dimethylaniline, 3,3 '-two chloro-4,4-diphenylamines, 2,6-diamino pyridine, 4,4 ' diamino phenylmethane etc.These amines can use a kind of, also can use mixing more than 2 kinds.
Be used to seal terminal terminal sealing agent dimethyl amine, monoethanolamine, n-propylamine, n-butylamine, dihexylamine, ethanol, propyl alcohol (1-propyl alcohol, 2-propyl alcohol), butanols (1-butanols, 2-butanols) etc. are for example arranged.Terminal sealing agent can add behind chain elongation, also can (when for example polymer and diisocyanate react) add when acrylic polymers reacts, and also can add when carrying out chain elongation.
Being coated in the finish on the elastomer yarn, is silicone oil, the mineral wet goods of the part methyl of diformazan silicon, diformazan silicon being replaced gained with other alkyl, phenyl, amido etc.
Multi-fibre elastomer yarn of the present invention is with the bonding agent of the bonding usefulness of health product primer, can in the bonding agent of the disclosed health product primer in this field, use with elastomer yarn, though do not have special qualification, be to use resin polymerization system, saturated polyester system or polyamide-based thermosol bonding agent best.
With comparative example the present invention is further specified by the following examples.
Cementability to elastomer yarn is estimated by the following method in embodiment and comparative example.
(1) prepares the thin nonwoven fabric that is used for amenities that Japan's weaving (strain) is produced, its reduction is the size of long 12cm * wide 3cm.The feather face of nonwoven fabric and retractility can cause the inequality of adhesive property, estimate so bonding plane united.
(2) under the state of taking it easy, 5 elastomer yarn are bonded on the ground paper with adhesive tape, make it also not lax.
(3) will dissolve with 170 ℃ by the thermosol bonding agent that ethene, propylene, butadiene, styrene form, to be set at the 5g/ branch from the discharge-amount of the machine of spuing, the ground paper that is stained with elastomer yarn along moving with the speed that 30m/ divides with the perpendicular direction of the elastomer yarn of arranging, is carried out the wire coating with the thermosol bonding agent.Afterwards at once with the nonwoven fabric shown in (1) with 2kg/cm 2Pressure push down 10 seconds, thereby produce the adhesive property test sample.The ASM-15 bonding force evaluation machine that the making of above sample is to use JT ト-シ (strain) to produce carries out.
(4) will in the room of 20 ℃ of constant temperature, take care of 24 hours by the sample that above-mentioned (3) step obtains, nonwoven fabric and elastomer yarn are carried out fixing conscientiously, on the mensuration machine U-1573 that the オ リ エ of Co., Ltd. Application テ Star Network produces, stretch along the vertical direction, peel off while on drawing, nonwoven fabric and elastomer yarn write down.At this moment, required intensity when drawing reads nonwoven fabric and elastomer yarn and peels off, the value that reads is set at bonding force (cN).
(5), both bonding back keepings in the room of 20 ℃ of constant temperature were peeled off with above-mentioned (4) same method after 100 hours for the timeliness of determining adhesive property changes.
The problem of the elastomer yarn of ※ paper diaper is retractions, and bonding force is when 150cN, and retraction just basically not taking place, will be decided to be qualified level more than the bonding force 150cN.
Embodiment 1
In being 975 ones of 1950 poly-fourth two ether alcohols, molecular weight adds 4,250 ones of 4 '-diphenylmethane diisocyanates stir and make it reaction, generate acrylic polymers, after this product dissolved in dimethylacetylamide, add 1,2 propylene diaminos carry out chain elongation, carry out the end envelope with ethamine and end, thereby generate polyurethane.
As shown in Figure 2, nozzle mount 1a place at long length of side 25cm, the long 10cm of minor face is equipped with spinning bayonet socket 1, configuration each 7 hole circle shape nozzle 1b of 4 of two row up and down on the bayonet socket, this bayonet socket 1 are (Fig. 1) that installs according to the direction that its major axis parallels with the major axis of godet roller 5a, 5b.Polyurethane clamp-oned in the spinning tube 2 that 240 ℃ of hot blasts flow by spinning bayonet socket 1 produce 56 monofilament, this monofilament binds the circular guide holes 3a inner face friction of leading material 3 with the ceramic material that is installed in spinning tube 2 belows, assemble flat on one side, weld mutually on one side, and bind the oiling supply arrangement 4 lead between material 3 and the godet roller 5a and implement oilings by being arranged on, press the speed curled hair that 300m/ divides with guide roller 5a, 5b simultaneously, generate the elastic polyurethane filament 6A that is attached with 0.05 weight % finish at last.
It is 3mm that elastic yarn binds the circular guide holes diameter of leading material 3, the long 3mm in hole.Apart from size A between spinning bayonet socket pore farthest, the relation apart from B is B/A=31.6 between the material 3 with leading from spinning bayonet socket 1 to binding.What finish used is diformazan silicon.
The fineness of the elastic polyurethane silk thread that obtains is 940 dtexs, the long limit L of rectangle that the strand cross section is external 1With minor face L sLength compares L 1/ L sBe 6.4, the length of rectangular perimeter L1 that the strand cross section is external and strand perimeter of section L2 is 0.75 than L1/L2.
Carry out aforementioned adhesive property evaluation experiment by the elastic polyurethane silk thread that uses above method to obtain.Its result such as table 1 are represented.
Embodiment 2
The sticking amount of paying of degreaser is beyond 3 weight, and other is identical with embodiment 1 operation, and so just having obtained the silk thread fineness is 940 dtexs, the long limit L of rectangle that the strand cross section is external 1With minor face L sLength compares L 1/ L sBe 6.2, the length of rectangular perimeter L1 that the strand cross section is external and strand perimeter of section L2 is 0.76 elastic polyurethane silk thread than L1/L2.Carry out aforementioned adhesive property evaluation experiment by the elastic polyurethane silk thread that uses above method to obtain.Its result is as shown in table 1.
Embodiment 3
Use the device of Fig. 3, use with the same method of the foregoing description 1 and adopt polyurethane solutions to produce elastomer yarn.Spinning bayonet socket, spinning tube 2 are identical with Fig. 1.Bind with leading the U font guide channel that material 3 ' is a ceramic material, the wide x of U font guide channel is 5mm, and long y is 3mm.
The monofilament of extruding from 4 nozzles of 4 nozzles in round nozzle 1b right side and left side of spinning bayonet socket 1 (with reference to Fig. 2) is by being separately positioned on 2 simple and easy twisting frame 7a, 7b of spinning tube 2 belows, make 2 cross sectional shapes basically form circular strand, next below the 15cm of simple and easy twisting frame 7a, 7b, binding with leading material 3 ' by the U font is 1 rhizoid bar with the set of 2 rhizoid bars.This strand binds the oiling supply arrangement 4 enforcement oilings of leading between material 3 ' and the godet roller 5a by being arranged on, press the speed curled hair that 300m/ divides with godet roller 5a, 5b simultaneously, generation is attached with 0.05 weight % finish at last, fineness is the elastic polyurethane filament 6B of 940 dtexs.The value of B/A and embodiment 1 are identical all to be 31.6.
The external rectangle in the elastic polyurethane silk thread strand cross section of Huo Deing is grown limit L like this 1With minor face L sLength compares L 1/ L sBe 2.2, the length of rectangular perimeter L1 that the strand cross section is external and strand perimeter of section L2 is 0.70 than L1/L2.Use the elastic polyurethane silk thread to carry out aforementioned adhesive property evaluation experiment.Its result is as shown in table 1.
Comparative example 1
Utilize the device of Fig. 5, use with the foregoing description 1 identical polyurethane solutions and make elastic yarn.In Fig. 5, spinning bayonet socket 1, spinning tube 2 are identical with Fig. 1.Simple and easy twisting frame 7 places that below spinning tube 2, are provided with, be fused into strand by 56 monofilament interlacings extruding from spinning bayonet socket 1, implement oiling by the oiling supply arrangement that is arranged on simple and easy twisting frame 7 belows, press the speed curled hair that 300m/ divides with godet roller 5a, 5b simultaneously, generation is attached with 0.05 weight % finish, fineness is the cruel shape elastic polyurethane of the milk filament 6C of 940 dtexs.
The external rectangle in the elastic polyurethane silk thread strand cross section of Huo Deing is grown limit L like this 1With minor face L sLength compares L 1/ L sBe 1.1, the length of rectangular perimeter L1 that the strand cross section is external and strand perimeter of section L2 is 0.61 than L1/L2.Use the elastic polyurethane silk thread to carry out aforementioned adhesive property evaluation experiment.Its result is as shown in table 1.
Table 1
Embodiment 1 Embodiment 2 Embodiment 3 Comparative example 1
L 1/L s 6.4 6.2 2.2 1.1
L1/L2 0.75 0.76 0.70 0.61
The sticking amount (weight %) of paying of finish 0.05 3.00 0.05 0.05
Peel strength (cN) after bonding 24 hours 428 242 236 153
Peel strength (cN) after bonding 100 hours 417 220 221 138
From table as can be seen, the elastic yarn among the embodiment is bonding with the nonwoven fabric that scribbles bonding agent with very high bonding force, still keeps very high bonding force after 100 hours.Though and in comparative example, reach qualified horizontal 150cN through the bonding force after 24 hours, dropped to below the 150cN through bonding force after 100 hours.

Claims (4)

1. elastomer yarn that is used for amenities, it is characterized in that elastomeric polymer is obtained elasticity multi-fibre silk thread by dry type spinning method, this elasticity multi-fibre silk thread that is used for amenities has flat cross section, i.e. the long limit (L of elasticity strand cross section bounding rectangle 1) length and minor face (L s) length (L 1/ L s) ratio be more than 2, the elastomer yarn surface forms concavo-convex state by the monofilament cross section that constitutes strand, the girth (L1) of elasticity strand cross section bounding rectangle and the ratio (L1/L2) of strand perimeter of section (L2) they are below 0.9.
2. the elastomer yarn that is used for amenities according to claim 1 is characterized in that the elastomer yarn surface scribbles finish, and the amount of being coated with of finish is 0.01～5% with the ratio of strand weight.
3. the elastomer yarn that is used for amenities according to claim 1 is characterized in that fineness is within 155～2490 dtex scopes.
4. the elastomer yarn that is used for amenities according to claim 1 is characterized in that the elastomeric polymer of production elastomer yarn is meant polyurethane.
CNB001080695A 1999-06-21 2000-06-12 Elastic filament used for hygienic articles Expired - Fee Related CN1139680C (en)

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JP174718/1999 1999-06-21
JP17471899 1999-06-21
JP2000003952A JP4045711B2 (en) 1999-06-21 2000-01-12 Elastic yarn for hygiene products
JP003952/2000 2000-01-12

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CN1278025A CN1278025A (en) 2000-12-27
CN1139680C true CN1139680C (en) 2004-02-25

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TWI705163B (en) * 2019-06-21 2020-09-21 勤倫有限公司 Cutting method of elastic film material and elastic thread
CN111441120A (en) * 2020-04-20 2020-07-24 杭州舒尔姿氨纶有限公司 Production method and application of heavy denier spandex yarn containing parallel multi-strand yarn
CN111962190B (en) * 2020-08-18 2021-12-28 华峰化学股份有限公司 Polyurethane elastic fiber with anti-skid elastic performance and preparation method thereof
CN111973346A (en) * 2020-09-03 2020-11-24 贵州卡布婴童用品有限责任公司 Pressure-reducing waistline of paper diaper and manufacturing process thereof

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CN1278025A (en) 2000-12-27

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