CN109881371A - A kind of elastic multilayer, its manufacturing method and special spinning jet - Google Patents
A kind of elastic multilayer, its manufacturing method and special spinning jet Download PDFInfo
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- CN109881371A CN109881371A CN201910297726.9A CN201910297726A CN109881371A CN 109881371 A CN109881371 A CN 109881371A CN 201910297726 A CN201910297726 A CN 201910297726A CN 109881371 A CN109881371 A CN 109881371A
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Abstract
The invention discloses a kind of elastic multilayers, ribbon fibre silk is squeezed out by raw material of thermoplasticity polyester elastomer, certain thickness nonwoven fabric from filaments is formed after curling bonding, the front and back sides of nonwoven fabric from filaments are respectively high rigidity and soft fiber filament layer, the middle part of thickness direction is the cross-bedding that different hardness fiber filament interts bonding each other, is more than or equal to 4.0 with the support factor that soft face is tested.Compared with the polyester elastomer fiber of high rigidity, soft polyester elastomer fiber has higher resilience, flexibility, durability, and the insufficient part of indentation force deflection then relies on the polyester elastomer of high rigidity as supporting layer to improve integral product integral hardness, soft fibrous layer upward in the case where, compression initial stage soft fibrous layer can be experienced to the more soft contact of user, compression later period user, which occupies stably rear cross-bedding, can give the soft moderate experience of client, high rigidity fibrous layer can be harder to user, there is the experience of enough support forces, user experience comfort level is good.
Description
Technical field
The present invention relates to what ribbon fibre silk curled into have certain thickness elastomer, and ribbon fibre silk is by thermoplasticity
Polyester elastomer is made of raw material, which can be suitable for fields more particularly to a kind of layers such as office chair, sofa, beds
Shape elastomer, its manufacturing method and special spinning jet.
Background technique
Existing cushion, sofa cushion, mattress etc. are made frequently with polyurathamc, latex or spring etc., support because
Sub (Support factor) is a kind of standard for judging elastic properties of materials and comfort, i.e., when product is compressed to strain 65%
Pressure value divided by product be compressed to strain 25% when pressure value ratio, in general support the factor get over high product comfort
Better, the high product of the support factor feels softer in the compression initial stage experience that user has just taken, user occupy stably after compression after
Phase experience feels harder, can play enough support effects.Support product comfort of the factor lower than 2.0 when poor.At present
The support factor of foamed polyurethane products usually 3.0 hereinafter, in its use process user experience compression initial stage feel hard, and send out
Steeping polyurethane products, there is also resilience is poor after shortage gas permeability, long compressive, the disadvantages of being easy flavescence is used for a long time.Latex produces
The support factor of product is 3.0-4.0, and emulsion products are relatively soft, and supporting degree is also enough, therefore user experience comfort is preferable, but cream
Glue product the shortcomings that there are poor air permeabilities, and because its own hardness is softer, high rigidity product can not be made to meet more users
Demand.The support factor of spring product is 2.0-3.0, although the gas permeability of spring product is good, soft spring product branch
Support degree is inadequate, and the enough products of supporting degree are short of pliability, and spring product long-time service is easily damaged, and consume is very fast.In order to obtain
The preferable support factor, many bedding products use multi-layer compound structure, such as superficial layer is sponge, and middle part is latex, bottom
Portion is spring, but complex manufacturing technology, higher cost, and between each layer independently of one another, user experience is poor.
Ribbon fibre is made by raw material of thermoplasticity polyester elastomer in the prior art, then curls into certain thickness
Solid netted elastomer, the polyester elastomer that existing solid netted elastomer generallys use single hardness is made.For
Various ways, such as the pore size by controlling spinneret are also used in the biggish support factor practice of acquisition, is produced
Filamentary fibers line footpath different product in two sides above and below thickness direction, but practical discovery is this to improve flexibility using fine line diameter
Method can reduce the durability of the solid netted elastomer, moreover, the raw material in spinneret can be inclined to toward large aperture wire vent, it can not
The wire vent uniformity is controlled, so the density of thickness direction is unable to control, the wire vent of large aperture side is more and diameter is big, small-bore side
Wire vent is few and diameter is small, leads to that product side is excessively soft and the other side is too hard, and the support factor is lower than 3.5.For another example specially
Sharp CN105026632A discloses a kind of reticular structure body for compressing excellent in te pins of durability, which uses a kind of Polyester thermoplastic
Property elastomer be made, by when spinning Polyester thermoplastic elastomer (TPE) below nozzle be arranged soak zones, utilize heater
It heats the soak zones, improve the net surface temperature for drawing the lowering position periphery of continuous threadlike body of transmission net or the company of raising
The methods of cooling water temperature in the cooling bath on the lowering position periphery of continuous threadlike body constitutes the continuous of reticular structure body to enhance
Joint strength between threadlike body, to improve the Repeated Compression durability of reticular structure body.But during actual fabrication, protect
The setting of temperature area will cause thermal degradation of the Polyester thermoplastic elastomer (TPE) in extrusion process, and yield rate is low, and finished product is also deposited
In stiff problem, especially be used alone high rigidity polyester elastomer production when, solid netted elastomer finished product it is stiff
Problem is especially apparent, under although stiff product can achieve the durable effect of Repeated Compression, but its resilience is significantly also understood
Drop, the support factor are lower than 3.5, and user's comfort is poor.
Summary of the invention
The product that the applicant is made for the polyester elastomer in above-mentioned existing production using single hardness can not
The shortcomings that significantly improving the support factor, provides a kind of structurally reasonable elastic multilayer and its manufacturing method and dedicated spinneret
The different nonwoven fabric from filaments of positive and negative surface hardness, the middle part of thickness direction is made using the polyester elastomer fiber of two kinds of different hardness in plate
The cross-bedding for interting bonding each other for high soft fiber filament can significantly improve the support factor of product, buckling durability, return
Elasticity, long service life.
The technical solution adopted in the present invention is as follows:
A kind of elastic multilayer squeezes out ribbon fibre silk by raw material of thermoplasticity polyester elastomer, forms one after curling bonding
Determine the nonwoven fabric from filaments of thickness, the front and back sides of nonwoven fabric from filaments are respectively high rigidity and soft fiber filament layer, and the middle part of thickness direction is not
Intert the cross-bedding of bonding each other with hardness fiber filament, is more than or equal to 4.0 with the support factor that soft face is tested.
As a further improvement of the above technical scheme:
The hardness of the high hardness material is 92A~97A, and the hardness of low-durometer material is 80A~91A.
The high hardness material hardness differs 15 DEG C or more with the fusing point of low-durometer material hardness, preferably differ 20 DEG C with
On.
Cross-bedding accounts for integral thickness percentage 15~40%.
40% indentation force deflection of layered elastomer is 120N~300N, and Hardness loss is lower than 25% to endurance repeatedly.
It is 20~60wt% that low-durometer material, which accounts for overall weight percentage,.
The density of layered elastomer is 35~80KG/m3, with a thickness of 30mm~200mm；Polyester elastomer soft segment is
Polytetrahydrofuran.
Wherein the content of soft segmer of high rigidity polyester elastomer is 45~30wt%, and soft polyester elastomer content of soft segmer is
46~75wt%.
A method of above-mentioned elastic multilayer being manufactured, by soft polyester elastomer raw material, high rigidity polyester
Body raw material is sent into different extruders, spinneret two sides is squeezed into respectively through partition distribution, during filamentary fibers decline cooling
The adjacent high rigidity fiber filament in partition two sides and the bonding interlaced with each other of soft fiber filament, molding obtain elastic multilayer.
A kind of spinneret for realizing above-mentioned manufacture elastic multilayer, is arranged partition, or in spinneret inside spinneret
Distribution plate is arranged in top, and partition is arranged inside distribution plate.
Beneficial effects of the present invention are as follows:
The thermoplasticity polyester elastomer for the high and low different hardness that the present invention differs 15 DEG C or more using two kinds of fusing points is raw material,
Squeeze out and form certain thickness nonwoven fabric from filaments after curling bonding after ribbon fibre silk, the front and back sides of nonwoven fabric from filaments be respectively high rigidity with it is low
Hardness fiber filament layer, the middle part of thickness direction are the cross-bedding that high soft fiber filament interts bonding each other, and the support factor is 4.0
Or more.Compared with the polyester elastomer fiber of high rigidity, soft polyester elastomer fiber has higher resilience, softness
Property, durability, and the insufficient part of indentation force deflection then relies on the polyester elastomer of high rigidity as supporting layer to improve whole production
Product integral hardness, thus soft fibrous layer upward in the case where, be followed successively by from top to bottom soft fibrous layer, cross-bedding and
High rigidity fibrous layer, the contact experience that compression initial stage soft fibrous layer can be more soft to user, compression later period user occupy stably
Cross-bedding can give the soft moderate experience of client afterwards, high rigidity fibrous layer can it is harder to user, have enough support forces
Experience, user experience comfort level is good.The present invention is cooperated using the polyester elastomer fiber of high and low hardness, wherein high hard
Degree material hardness is 92A ~ 97A, and low-durometer material hardness is 80A ~ 91A, realizes optimal stiffening effect and soft effect, significantly
Improve the support factor.
The present invention is arranged distribution plate above spinneret, and distribution plate is internally provided with partition, high rigidity polyester elastomer and
The allocated plate of soft polyester elastomer respectively enters spinneret two sides, and high rigidity fiber filament is formed when spraying from spinneret
With soft fiber filament, the adjacent high rigidity fiber filament in partition two sides is handed over each other with soft fiber filament during spraying decline
Mistake is cohered, and since soft polyester bulk melting point is lower, and by high rigidity fiber filament to be influenced temperature higher thus low for die section
Hardness polyester elastomer can be melted sufficiently, can protrude play the role of adhesive while cooling, therefore can be greatly improved
The cohesion at the junction of high rigidity fiber filament and soft fiber filament ecotone, so that the middle part cross-bedding in product thickness direction
Buckling durability improve.
Another advantage of the invention is that product two sides has different indentation force deflections, therefore consumer when in use may be used
According to the hobby of oneself, the optimal indentation force deflection oneself liked and sense of touch are selected to determine suitable face as using face.This
Invention can also change the hardness on two sides by changing two kinds of materials, to control the support factor of product, resilience, comfortable
Property and feel, more alternative products are produced by the collocation of different high softs, combination, consumer's selection is wide.
The present invention is compared with using solid netted elastomer product made of single hardened material, soft polyester elastomer
40% indentation force deflection on one side is neither too hard, nor too soft between 120N ~ 300N；Hardness loss is lower than 25% to endurance repeatedly, and soft is poly-
The support factor of ester elastomer one side can achieve 4.0 or more, and comfort greatly improves, and the face rebound degree of product can be mentioned substantially
Height reduces the possibility of collapse or deformation；Compress it is sound-deadening properties be evaluated as can or it is excellent, noise when compression can be reduced, sense of touch is good,
It is particularly suitable as mattress use.
Manufacturing process of the invention only needs to increase extruder all the way, and slightly improving on spinneret can be realized difference firmly
It is squeezed out while angle value polyester elastomer, simple process, quality control easy to accomplish, product can directly obtain higher support
The factor, it is simple for production, there is significant economic value.
Detailed description of the invention
Fig. 1 is high and low two kinds of different hardness polyester elastomer distribution schematic diagram of the invention.
Fig. 2 is manufacture craft of the invention.
Fig. 3 is distribution plate schematic diagram of the invention.
Fig. 4 is spinneret schematic diagram of the invention.
Fig. 5 is distribution plate of the invention and spinneret combination diagram.
In figure: 1, soft layer；2, cross-bedding；3, high rigidity layer；4, distribution plate；5, spinneret；6, partition.
Specific embodiment
Specific embodiments of the present invention will be described below with reference to the accompanying drawings.
Distribution plate is arranged in the present invention above spinneret, and distribution plate is internally provided with partition, use thermoplastic polyester as
Hard section, tetrahydrofuran are raw material, the polyester bullet of two kinds of hardness of height as the polyester elastomer that soft segment makes two kinds of hardness of height
Property body raw material be respectively fed to different extruders, spinneret two sides are squeezed into the partition distribution of the allocated plate respectively, are gone out in spinneret
During silk, the high rigidity fiber filament adjacent positioned at partition two sides with soft fiber filament is interlaced with each other coheres, ribbon fibre exists
It is crimped in water, finally molding obtains elastic multilayer in a mold, and high rigidity fiber filament and soft fiber filament are in product thickness
Layer is inserted staggeredly each other in the middle part of direction, and cross-bedding accounts for 15 ~ 40wt% of integral thickness percentage.As shown in figure 3, vertical clapboard can position
In the middle part of distribution plate, setting orthogonal with distribution plate, spinneret can also be according to the polyester elastomer raw material of actual different hardness
Usage amount adjust position on distribution plate.
The filamentary fibers of elastic multilayer can be air silk, be also possible to other special solid silks.
Table 1
The specific test method is as follows:
1, thickness: product thickness is measured using pachometer, 5 samples is randomly selected and is averaged.
2, density: product is put into baking oven, baking oven is set as 80 DEG C of * 3h, it is ensured that after moisture removal, measures the length and width of product
Height calculates volume, and to be accurate to three after decimal point precision balance weighings, calculates density later.
3,40% indentation force deflection is tested: test surfaces are soft polyester dignity, are tested with a thickness of 50mm, in 23 DEG C of perseverances
Determine at temperature, product is placed between two platens up and down, under the test speed of 100mm/min, is compressed to strain 40%, upper pressure
The pressure sensor of the downward compressed products of disk, upper end experiences pressure, and converts pressure into voltage signal and be defeated by display
Parsing, while pressure value is shown on screen, test is averaged three times.
4, support factor test: test surfaces are soft polyester dignity, and under 23 DEG C of steady temperatures, product is set
Between upper and lower two platen, at test speed 100mm/min, it is compressed to strain 25% and 65% respectively, upper platen compresses downwards
The pressure sensor of product, upper end experiences pressure, and converts pressure into voltage signal and be defeated by display parsing, presses simultaneously
Force value is shown on screen, and test is averaged three times.65% pressure value is supported the factor divided by 25% pressure value.
5, endurance Repeated Compression Hardness loss leads: under 23 DEG C of steady temperatures, product being put into Repeated Compression test
On the lower platform of instrument, compressing force 750N is set, with 70 times per minute frequency Repeated Compression products, evaluates and produces after compression 80,000 times
The performance of product.Endurance Repeated Compression Hardness loss leads=(difference of the forward and backward hardness power of product test)/product test before hardness power *
100%, test is averaged three times.
6, it compresses sound-deadening properties evaluation: elastic multilayer continued compression disappears to sound by three different testers
Sound evaluation, is classified as excellent, good, poor three grades.
Embodiment 1
The soft polyester elastomer B-1 raw material for accounting for 40% mass percent of total amount is sent into the first component extruder, is heated to
220 DEG C of molten conditions, the high rigidity polyester elastomer A-2 raw material of 60% mass percent, are heated in the second component extruder
To 230 DEG C of molten conditions；It is got into die head respectively after metering, the partition distribution of the allocated plate, A-2 raw material and B-1 raw material difference
Positioned at the two sides of spinneret, draw-down rate is 0.4 m/min, declines in filamentary fibers and falls into the mistake of the cooling curling of 30 DEG C of cold water
The adjacent high rigidity fiber filament in partition two sides and the bonding interlaced with each other of soft fiber filament in journey, finally molding obtains in a mold
Elastic multilayer tests elastic multilayer by the above method, obtains physical parameter and is shown in Table 2, laminated resilient volume density is 60Kg/
cm3, with a thickness of 50mmm, soft polyester elastomer materials surface hardness 221N, endurance Repeated Compression Hardness loss lead for
25%。
Embodiment 2
The soft polyester elastomer B-2 raw material for accounting for 40% mass percent of total amount is sent into the first component extruder, is heated to
220 DEG C of molten conditions, the high rigidity polyester elastomer A-1 raw material of 60% mass percent, are heated in the second component extruder
To 240 DEG C of molten conditions；It is got into die head respectively after metering, the partition distribution of the allocated plate, A-1 raw material and B-2 raw material difference
Positioned at the two sides of spinneret, draw-down rate is 0.4 m/min, declines in filamentary fibers and falls into the mistake of the cooling curling of 30 DEG C of cold water
The adjacent high rigidity fiber filament in partition two sides and the bonding interlaced with each other of soft fiber filament in journey, finally molding obtains in a mold
Elastic multilayer tests elastic multilayer by the above method, obtains physical parameter and is shown in Table 2, laminated resilient volume density is 60Kg/
cm3, with a thickness of 50mmm, soft polyester elastomer materials surface hardness 245N, endurance Repeated Compression Hardness loss lead for
21%。
Embodiment 3
The soft polyester elastomer B-2 raw material for accounting for 40% mass percent of total amount is sent into the first component extruder, is heated to
220 DEG C of molten conditions, the high rigidity polyester elastomer A-2 raw material of 60% mass percent, are heated in the second component extruder
To 230 DEG C of molten conditions；It is got into die head respectively after metering, the partition distribution of the allocated plate, A-2 raw material and B-2 raw material difference
Positioned at the two sides of spinneret, draw-down rate is 0.4 m/min, declines in filamentary fibers and falls into the mistake of the cooling curling of 30 DEG C of cold water
The adjacent high rigidity fiber filament in partition two sides and the bonding interlaced with each other of soft fiber filament in journey, finally molding obtains in a mold
Elastic multilayer tests elastic multilayer by the above method, obtains physical parameter and is shown in Table 2, laminated resilient volume density is 60Kg/
cm3, with a thickness of 50mmm, soft polyester elastomer materials surface hardness 177N, endurance Repeated Compression Hardness loss lead for
18%。
Comparative example 1
The soft polyester elastomer B-2 raw material of 100% mass percent of total amount will be accounted for, 220 DEG C are heated in extruder and is melted
Melt state；It squeezes out in progressive die head, the wire vent after spinneret, draw-down rate is 0.4 m/min, and filamentary fibers fall into 30 DEG C of cold water, most
Molding obtains elastic multilayer in a mold afterwards, and the density of elastic multilayer is 60Kg/cm3, with a thickness of 50mmm, the stratiform bullet
Property body hardness be 107N, it is 27% that endurance Repeated Compression Hardness loss, which leads,.The elastic multilayer hardness of the present embodiment only has
107N feels partially soft as mattress, and support hardness is obviously insufficient.
Comparative example 2
The high rigidity polyester elastomer A-1 raw material of 100% mass percent of total amount will be accounted for, 240 DEG C are heated in extruder and is melted
Melt state；It squeezes out in progressive die head, the wire vent after spinneret, draw-down rate is 0.4 m/min, and filamentary fibers fall into 30 DEG C of cold water, most
Molding obtains elastic multilayer in a mold afterwards, and the density of elastic multilayer is 60Kg/cm3, with a thickness of 50mmm, the stratiform bullet
Property body hardness 351N, it is 35% that endurance Repeated Compression Hardness loss, which leads,.The elastic multilayer extreme hardness of the present embodiment, is used for
Do the durable deficiency of the obvious really up to the mark and Repeated Compression of mattress.
Table 2
Embodiment one, two, three (comparative example one and comparative example two) compared with using elastic multilayer product made of homogenous material,
Soft fibrous layer upward in the case where, as shown in Figure 1, it is hard to be followed successively by soft fibrous layer, cross-bedding and height from top to bottom
Fibrous layer, the contact experience that compression initial stage soft fibrous layer can be more soft to user are spent, compression later period user hands over after occupying stably
Staggered floor can give the soft moderate experience of client, and high rigidity fibrous layer can body that is harder to user, having enough support forces
It tests, the support factor of soft polyester dignity can achieve 4.0 or more, and 40% indentation force deflection is resistance between 177N ~ 245N
Hardness loss is only 18% ~ 25% to fatigue repeatedly, and the face rebound degree of product can greatly improve, and reduces the possibility of collapse or deformation；Pressure
Contract it is sound-deadening properties be evaluated as excellent or good, noise when compression can be reduced, comfort greatly improves, and being particularly suitable as mattress makes
With.
Above description is explanation of the invention, is not intended to limit the invention, without departing from the spirit of the invention,
The present invention can make any type of modification.Such as distribution plate can not also be set above spinneret, directly in spinneret
Partition is arranged in portion, as long as the polyester elastomer raw material that two kinds of hardness may be implemented respectively enters spinneret two sides.
Claims (10)
1. a kind of elastic multilayer squeezes out ribbon fibre silk by raw material of thermoplasticity polyester elastomer, is formed after curling bonding
Certain thickness nonwoven fabric from filaments, it is characterised in that: the front and back sides of nonwoven fabric from filaments are respectively high rigidity and soft fiber filament layer, thickness side
To middle part be cross-bedding that different hardness fiber filament interts bonding each other, the support factor tested with soft face is greater than
Equal to 4.0.
2. elastic multilayer described in accordance with the claim 1, it is characterised in that: the hardness of the high hardness material is 92A ~ 97A,
The hardness of low-durometer material is 80A ~ 91A.
3. elastic multilayer described in accordance with the claim 1, it is characterised in that: the high hardness material hardness and low-durometer material
The fusing point of hardness differs 15 DEG C or more, preferably differs 20 DEG C or more.
4. elastic multilayer described in accordance with the claim 1, it is characterised in that: cross-bedding accounts for integral thickness percentage 15 ~ 40%.
5. elastic multilayer described in accordance with the claim 1, it is characterised in that: 40% indentation force deflection of layered elastomer is
120N~300N, Hardness loss is lower than 25% to endurance repeatedly.
6. elastic multilayer described in accordance with the claim 1, it is characterised in that: it is 20 that low-durometer material, which accounts for overall weight percentage,
~60wt%。
7. elastic multilayer described in accordance with the claim 1, it is characterised in that: the density of layered elastomer is 35 ~ 80KG/
m3, with a thickness of 30mm ~ 200mm；Polyester elastomer soft segment is polytetrahydrofuran.
8. elastic multilayer described in accordance with the claim 1, it is characterised in that: the wherein content of soft segmer of high rigidity polyester elastomer
For 45 ~ 30wt%, soft polyester elastomer content of soft segmer is 46 ~ 75wt%.
9. a kind of method of elastic multilayer described in manufacturing claims 1, it is characterised in that: soft polyester elastomer is former
Material, high rigidity polyester elastomer raw material are sent into different extruders, spinneret two sides are squeezed into respectively through partition distribution, in filamentary fibers
Partition two sides adjacent high rigidity fiber filament and the bonding interlaced with each other of soft fiber filament, molding obtain during decline is cooling
Elastic multilayer.
10. a kind of realize the spinneret for manufacturing elastic multilayer described in claim 9, it is characterised in that: set inside spinneret
Partition is set, or distribution plate is set above spinneret, partition is set inside distribution plate.
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| CN111020723A (en) * | 2019-11-19 | 2020-04-17 | 安徽东锦资源再生科技有限公司 | Spinneret plate for producing large bright flat fibers |
| CN111690991A (en) * | 2020-07-23 | 2020-09-22 | 昆山无双金属科技有限公司 | Novel mask mould spinneret plate |
| CN113463217A (en) * | 2021-07-12 | 2021-10-01 | 无锡科逸新材料有限公司 | Dimensionally stable layered elastomers |
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|---|---|
| CN109881371B (en) | 2020-11-20 |
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