CN1969074A - Spunbond nonwoven fabric - Google Patents
Spunbond nonwoven fabric Download PDFInfo
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- CN1969074A CN1969074A CN200580019559.8A CN200580019559A CN1969074A CN 1969074 A CN1969074 A CN 1969074A CN 200580019559 A CN200580019559 A CN 200580019559A CN 1969074 A CN1969074 A CN 1969074A
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Abstract
The invention provides a polyester spunbonded nonwoven fabric which has excellent low modulus, keeps high extensibility, has excellent forming processability and tracking performance, has excellent dimensional stability after forming and is particularly suitable for backing base fabrics of automobile interior decoration. The present invention is a spunbonded nonwoven fabric comprising a nonwoven fabric made of continuous fibers comprising an aromatic polyester (melting point: Tm1) and 1 to 15 wt% of an aromatic copolyester (melting point: Tm2 ℃: 150 ℃ to (Tm 1-20 ℃)), wherein the nonwoven fabric has an elongation of 20% to 100%, and a load at 5% elongation is per g/m2The weight per unit area of is 1.2N/50mm or less; the spunbonded nonwoven fabric of , wherein the spunbonded nonwoven fabric is composed of an aromatic polymerEsters are polybutylene terephthalate; and (C) the spunbonded nonwoven fabric according to any one of (A) to (B), wherein the endothermic peak indicating the melting point in the temperature rise process of the differential scanning calorimeter has an endothermic onset temperature of 140 ℃ or higher.
Description
Technical field
The present invention relates to a kind of low modulus, spunbond polyester type nonwoven fabric that extensibility is good, specifically, relate to aspect shaping processability, tracking property good, and the also good spunbond polyester type nonwoven fabric that is applicable to automobile interior trim material back boxing base fabric aspect the DIMENSIONAL STABILITY after shaping.In addition, also relate to the spunbond polyester type nonwoven fabric of door trim bar with the back boxing base fabric.
Background technology
As the back boxing base fabric of inner decoration material for vehicle, be extensive use of nonwoven fabric such as fabric, spun-bonded nonwoven fabric or staple fibre such as braided fabric, wealthy width of cloth fine cloth such as knitwear, tricot.In this kind automobile interior trim material purposes, in recent years, not only require design, and require senior sense of touch, thus, require the softnessization on surface consumingly.But when with soft surface, to the decoration of epidermis, promptly outward appearance produces a very large impact because the extensibility of back boxing base fabric or tracking property are passed cushion, therefore with the softnessization on surface, the requirement of the function of back boxing base fabric is also uprised.Particularly in the middle of automobile interior trim material, because door trim bar part is often concavo-convex very big, it is big that distortion during shaping becomes, therefore be difficult to keep high-quality, on the other hand, owing to be the position that frequently enters consumer's the visual field, and the chance that directly contacts is also a lot, therefore require extra high technology, quality.As the back boxing base fabric that satisfies this kind requirement, what proposed low modulus, high extensibility is the good polyamide nonwoven fabric of long fibers of formability (for example patent documentation 1).But, though this kind nonwoven fabric has lower modulus and high extensibility, because therefore the DIMENSIONAL STABILITY deficiency after being shaped is difficult to keep form, thereby produce sagging (phenomenon of the back metamorphosis that is shaped), have the problem of the reason of the quality reduction that produces after being shaped.
Patent documentation 1: the spy opens the 2003-113569 communique
Like this, though announcing has good nonwoven fabric aspect low modulus, high extensibility, yet also can't obtain aspect shaping processability, tracking property goodly especially, the DIMENSIONAL STABILITY after the shaping is also good is suitable for the nonwoven fabric of automobile interior trim back boxing base fabric such as door trim bar.
Summary of the invention
The present invention finishes as a setting with the problem of conventional art, the scheme of following spun-bonded nonwoven fabric is proposed, promptly, low modulus also keeps high extensibility, good especially aspect shaping processability, tracking property, and also good aspect the DIMENSIONAL STABILITY after shaping, be specially adapted to automobile interior trim back boxing base fabric.
The inventor etc. further investigate in order to solve described problem, and the result has finished the present invention finally.Promptly, the present invention (1) provides a kind of spun-bonded nonwoven fabric, be by containing aromatic polyester (fusing point: Tm1), be the nonwoven fabric that the continuous fibers of the aromatic series copolyester (fusing point: Tm2=150 ℃～(Tm1-20 ℃)) of 1～15 weight % is made with respect to this aromatic polyester, wherein, the percentage elongation of this nonwoven fabric extends 5% o'clock the every g/m of load more than 20% below 100%
2Weight per unit area be below the 1.2N/50mm; (2) according to (1) described spun-bonded nonwoven fabric, wherein, the heat absorption of the endothermic peak of the expression fusing point in the calorimetric temperature-rise period of differential scanning type begins temperature more than 140 ℃; (3) a kind of spun-bonded nonwoven fabric, be by containing 80 moles of aromatic polyester unit more than the %, it is the nonwoven fabric that 160 ℃～260 ℃ continuous fibers is made that the heat absorption of the endothermic peak of the expression fusing point in the calorimetric temperature-rise period of differential scanning type begins temperature, wherein, percentage elongation during 120 ℃ of this nonwoven fabric heating extends 5% o'clock the every g/m of load more than 40% below 100%
2Weight per unit area be below the 0.2N/50mm; (4) according to any described spun-bonded nonwoven fabric in (1)～(3), wherein, aromatic polyester is polybutylene terephthalate (PBT) or polytrimethylene-terephthalate; (5) according to any described spun-bonded nonwoven fabric in (1)～(4), wherein, has the stromatolithic structure of different densities.
Spun-bonded nonwoven fabric of the present invention can provide following spunbond polyester type nonwoven fabric at an easy rate, that is, low modulus also keeps high extensibility, and is good aspect shaping processability, tracking property, and also good aspect the DIMENSIONAL STABILITY after shaping, be specially adapted to automobile interior trim back boxing base fabric.More particularly, spun-bonded nonwoven fabric of the present invention is because with the crystallinity height, good thermal stability, polybutylene terephthalate (PBT) that modulus is lower slightly or polytrimethylene-terephthalate etc. are as principal component, improved hot-forming property, therefore by setting heat distortion temperature lower, provide at an easy rate with regard to can be used as following spunbond polyester type nonwoven fabric, promptly, has good low modulus, keep high extensibility, at shaping processability, tracking property aspect is good especially, also good aspect the DIMENSIONAL STABILITY after shaping, be specially adapted to the very big door trim bar of distortion for automobile interior trim back boxing base fabric.
The specific embodiment
Below with the present invention is described in detail.
The composition of fiber that constitutes nonwoven fabric of the present invention is preferably at aromatic polyester (fusing point: Tm1), contain the aromatic series copolyester (fusing point: Tm2=150 ℃～(Tm1-20 ℃)) of 1～15 weight %.
So-called aromatic polyester among the present invention is preferred: the polyester of aromatic dicarboxylic acid such as polyethylene terephthalate, PEN, polybutylene terephthalate (PBT), polytrimethylene-terephthalate, PBN, poly terephthalic acid cyclohexylidene dimethyl esters and glycol.
Owing to, preferably have the fusing point that can not make the aging temperature of other raw material with compound with other raw material that raw material use as automobile interior trim, when comparing with other raw-material fusing points when too high, then have aging easily possibility, therefore not ideal enough.In addition, being out of shape when flowing owing to do not satisfy stable on heating requirement to cross low temperature in compoundization, is unfavorable therefore.Consider these aspects,, can enumerate the good polyester that also can also keep 220 ℃～250 ℃ of stable on heating fusing points (following brief note is Tm) of hot-forming property as the highly preferred embodiment among the present invention.
In addition, in order to reach the purpose of the present application, wish the crystallinity height, modulus is lower slightly, and as the raw material that all satisfy these important documents, (following brief note is PBT:Tm1 to recommend polybutylene terephthalate (PBT); 228 ℃) or PBN (following brief note is PBN:Tm1; 243 ℃) etc.
Preferred 150 ℃ of the fusing point of used aromatic series copolyester among the present invention (following brief note is Tm2)～(Tm1-20 ℃).If it is Tm2 is less than 150 ℃,, when surpassing (Tm1-20 ℃),, therefore not ideal enough then owing to be difficult to improve interfibrous cementability then because the poor heat resistance when making nonwoven fabric is therefore not ideal enough.Preferred especially 155 ℃～(Tm1-30 ℃), more preferably 160 ℃～(Tm1-40 ℃).
So-called aromatic series copolyester other the ternary polyester that has been meant on illustrative aromatic polyester as described above copolymerization among the present invention, for example, as other the 3rd composition, concerning sour composition, can enumerate copolymerization M-phthalic acid, adipic acid, decanedioic acid, the ternary polyester of glutaric acid grade in an imperial examination; As diol component, the polyester of diol components such as diethylene glycol (DEG), neopentyl glycol, butanediol/ethylene glycol of can having enumerated copolymerization.If use these copolymer compositions, the spunbond polyester type nonwoven fabric that then can obtain to have flexibility and have very strong cohesive force because of following reason.
Among the present invention, make shown in the reasons are as follows of the copolymerization aromatic polyester that contains described fusing point Tm2 in the aromatic polyester of fusing point Tm1.Promptly can be speculated as, in fusion the matrix of aromatic polyester in disperseed well can be by the spinning aperture under the state of copolymerization aromatic polyester, on the contact interface of the molten condition before spinning, the copolymerization of copolyester and aromatic polyester takes place, when addition is fewer, then can in the relatively short time, finishes copolymerization and be scattered in the matrix.Then, when being subjected to very big shearing force in the spinning aperture, the copolymer that melt viscosity is low is just ejected to the aperture wall, forms the sheath cored structure.
Based on this kind reason, aromatic polyester polyaromatic polyester together both can be that the resin mixing is (with two or more polymer with the resin input, in extruder, mix, melt extrude and carry out spinning), also can utilize mixing grade to drop into from resin in advance before just with copolyester and aromatic polyester copolymerization.
The fiber that so is spun into is pulled on the net (net) with knitmesh (web) shape near being cooled to solidification point, yet this moment, the cohesive force that contains the interfibrous interface that fiber contacted of copolyester uprises, then, even carry out embossing processing etc., the nonwoven fabric fracture strength also can improve widely.According to this result, can think and to embody the such effect of thermal bonding fiber by carrying out the sheath cored structureization.
The fusing point of the characteristic that the conduct of the resin of the formation fiber of this moment is average and flow starting temperature just slightly reduce.That is, show the character that can not damage basically as the characteristic of the aromatic polyester of principal component.The content that can embody the aromatic series copolyester of this kind effect is 1～15 weight %.If because less than 1%, then can't see effect basically, if surpass the content of 15 weight %, then have the situation that the characteristic as the aromatic polyester of principal component slightly reduces, therefore not ideal enough.
Like this, copolymerization the fusing point of polyester and flow starting temperature reduce.Form property (flow starting temperature is low more good more more than temperature+20 of use ℃) in order to satisfy heat resistance (flow starting temperature and fusing point are high more good more) and shape simultaneously, preferred 140 ℃～240 ℃ of flow starting temperature, more preferably 160 ℃～230 ℃, most preferably 190 ℃～220 ℃.Flow starting temperature can begin temperature with the heat absorption that utilizes differential scanning type calorimeter measurement and replace in the present invention.If below 140 ℃, then because poor heat resistance is therefore not ideal enough.When surpassing 240 ℃, setting (set) the property variation during owing to shaping, therefore not ideal enough.In addition, owing to need at high temperature carry out nonwoven fabric in the nonwoven fabric manufacturing process heat treated when forming, therefore have and saving the disadvantageous problem that becomes aspect the energy.
Nonwoven fabric of the present invention is the nonwoven fabric of being made by the continuous fibers that constitutes with described polyester, preferably the every g/m of load the during elongation 5% of this nonwoven fabric
2Weight per unit area be the following spun-bonded nonwoven fabric of 1.2N/50mm.Even nonwoven fabric of the present invention is the member that also requires enough fracture strengths under low weight per unit area, constitute by long fiber.If staple fiber nonwoven fabric then has the problem that can't give enough fracture strengths under low weight per unit area.Nonwoven fabric of long fibers of the present invention also can be given enough fracture strengths owing to be spun-bonded nonwoven fabric even therefore hang down weight per unit area.
Spun-bonded nonwoven fabric of the present invention vertically and horizontal percentage elongation preferred more than 20% below 100%.If percentage elongation is then when using as the back boxing base fabric, therefore poor to the tracking of mold shape owing to being difficult to stretch less than 20%, can't form required shape, damaged situation is perhaps arranged, therefore not ideal enough.When percentage elongation surpassed 100%, then the reinforcing function of the back boxing base fabric of homogeneous reduced, and has the sagging situation of generation in shape, and is therefore not ideal enough.Preferred percentage elongation is 25%～80%, more preferably 30%～60%.
Spun-bonded nonwoven fabric of the present invention preferably extends 5% o'clock the every g/m of load
2Weight per unit area be below the 1.2N/50mm, the initial stage resistance when reducing elongation and guarantee tracking to mold shape.When at the elongation initial stage, resistance was big the time, then poor to the tracking of mold shape, the machining shape variation.In addition, owing to have damaged situation, therefore not ideal enough.Preferred 1.0N/50mm～0.4N/50mm, more preferably 0.8N/50mm～0.4N/50mm.
Though constituting the filamentary fiber number of spun-bonded nonwoven fabric of the present invention is not particularly limited, yet as automobile interior trim back boxing base fabric purposes, in order to give flexibility and reinforcing function or shielding function effectively, below the preferred 15dtex, more preferably 1dtex～8dtex.Be not particularly limited though constitute the joint form of the fiber of spun-bonded nonwoven fabric of the present invention, yet for the material that needs fracture strength than approaching, preferred embossing processing.Embossing is processed in a processing, is required under the situation of surface smoothing, preferred planar (plain) processing.For needing big, the fluffy material situation of thickness, preferred acupuncture processing.
Though the thickness of spun-bonded nonwoven fabric of the present invention is not particularly limited, preferably select thickness best concerning using the position.For example, as the inner lining material of seat cushion, from mar proof and the consideration of shape tracking property, preferred 0.2mm～0.5mm.In door trim bar purposes, in order to keep shaping resin shielding function and reinforcing function, preferred 0.3mm～1mm.For the material of roof plate purposes, since the cementability of attention and top board, therefore preferred 0.1mm～0.3mm.The inner decoration material of back case is owing to need sound insulation and absorption of vibrations function, therefore preferred 3mm～5mm.
Below will provide an example of the method for making of nonwoven fabric of the present invention.
Be recommended in intrinsic viscosity be more than 1.20, below 1.80 polybutylene terephthalate (PBT) (following brief note is PBT) and in polyethylene terephthalate for example copolymerization the fusing point of glycol of 30 moles of % be vacuumize when 180 ℃ aromatic polyester (PET copolymer) mixes, be made as below the 0.003 weight % and be used for spinning to major general's regain.Preferred regain among the present invention is below the 0.002 weight %.When omitting drying process, when from air vent (vent), moisture being removed, be recommended in the method for with high vacuum moisture being removed soon after reaching soon before the fusion in the extruder in the spinning stage.
Next, utilize well-established law to carry out melt spinning.Spinning temperature recommend the fusing point than polybutylene terephthalate (PBT) high 15 ℃～40 ℃ temperature.Preferred recommend high 25 ℃～temperature of 35 ℃.From aperture with when the molten polymer ejection, among the present invention, can recommend the aperture that can set shear rate higher.The best optimised quantity that is made as the fiber number that reaches required accordingly with structure formation that has improved shear rate and draw rate of spray volume.Among the present invention and since preferred fiber number be 1dtex to 8dtex, if therefore draw rate is 4000m/ minute, then the spray volume of each single hole preferably is made as 0.4g/ minute～3.2g/ minute.The nozzle of ejection both can be the little nozzle of multiple row that essential number is set, and also can use a slice nozzle with multiple row hole.Refinement in fusion lines cooling that will be sprayed and tractive.In the spun-bond process, utilize injector (ejector) tractive with air exhauster function, it is online that runout is deposited in conveyance, forms the knitmesh of opening fine stacked with state at random fiber alignment.
At this moment, exist fiber in the elastic recovery boundary, to postpone to restore and the situation of mechanical characteristic reduction.Thus, among the present invention, strong recommend by suppress to open fine stacked immediately the delay of knitmesh restore and the method that the knitmesh form is fixing.Specifically, can illustration utilize the immobilized method of sandwiching of tractive net, utilize the process for fixation of pressure roller.The fibre weight that the institute runout is piled up and tractive net spee are adjusted into the single face area weight that reaches required and the runout accumulation accordingly.Pile up under the certain situation of ribbon number at runout, when accelerating the tractive net spee, the fiber of then being opened fine will demonstrate the probability of arranging along the direct of travel (following brief note is MD) of net and become many tendencies.Just can adjust at random state by increasing ribbon number that runout piles up in such cases, productivity further improves.In the operation that the tractive net forms, need also consider essential thickness adjustment.
Then, lamination knitmesh is by continuously or discontinuous enforcement embossing processing.The embossing shape be with the essential function of required nonwoven surface accordingly the best such as selected element shape or density or flat shape shape and handle.Among the present invention, preferred 180 ℃～220 ℃ of the temperature of embossing processing, the preferred 20kN/m～200kN/m of linear pressure for PBT.
The manufactured spun-bonded nonwoven fabric of embossing of the present invention that so obtains can directly provide with base fabric as various automobile interior trim materials.
And the illustration among the present invention is not limited to these.
Nonwoven fabric of the present invention is preferred especially following formation under the situation that is used for door trim bar purposes.Promptly, the present invention both can be (A) a kind of spun-bonded nonwoven fabric, be by containing 80 moles of aromatic polyester unit more than the %, it is the nonwoven fabric that 160 ℃～260 ℃ continuous fibers is made that the heat absorption of the endothermic peak of the expression fusing point in the calorimetric temperature-rise period of differential scanning type begins temperature, during 120 ℃ of this nonwoven fabric heating, percentage elongation is more than 40% below 100%, and the load of extending 5% o'clock is every g/m
2Weight per unit area below 0.2N/50mm; Also can be (B) basis (A) described spun-bonded nonwoven fabric, wherein, aromatic polyester be polybutylene terephthalate (PBT) or polytrimethylene-terephthalate; Can also be any described spun-bonded nonwoven fabric in (C) basis (A)～(B), wherein, have the stromatolithic structure of different densities.
The composition that constitutes the fiber of nonwoven fabric of the present invention also can be by containing 80 moles of aromatic polyester unit more than the %, and the heat absorption of the endothermic peak of the expression fusing point in the calorimetric temperature-rise period of differential scanning type begins the nonwoven fabric that temperature is made at the continuous fibers more than 160 ℃.
Said aromatic polyester unit is meant among the present invention, the polyester unit of aromatic dicarboxylic acid such as ethylene glycol terephthalate, (ethylene naphthalate), trimethylene terephthalate, naphthalenedicarboxylic acid propylidene ester, mutual-phenenyl two acid bromide two alcohol ester, naphthalenedicarboxylic acid butanediol ester, terephthalic acid (TPA) cyclohexylidene dimethyl esters and glycol.
Among the present invention, preferably contain the above aromatic polyester unit that becomes the stable on heating skeleton of maintenance of at least 80 moles of %.If less than 80 moles of %, then because poor heat resistance is therefore not ideal enough.Preferably contain 90 moles of %, most preferably contain 100 moles of %.
In the embodiment, owing to, therefore preferably have the fusing point that can not make the aging temperature of other raw material, when higher than other raw-material fusing points with compound with other raw material that raw material use as automobile interior trim, then have aging easily possibility, therefore not ideal enough.In addition, when in carry out compoundization, flowing with very low temperature deformation, owing to do not satisfy stable on heating requirement, therefore not ideal enough.Promptly, as the most preferred embodiment among the present invention, good as having hot-forming property, and can also keep 220 ℃～250 ℃ of stable on heating fusing points (following brief note is Tm), the aromatic polyester that modulus is lower slightly, can enumerate: (following brief note is PTT:Tm to the polytrimethylene-terephthalate; 221 ℃), (following brief note is PTN:Tm to poly-naphthalenedicarboxylic acid propylidene ester; 238 ℃), (following brief note is PBT:Tm to polybutylene terephthalate (PBT); 228 ℃) or PBN (following brief note is PBN:Tm; 243 ℃) etc.
Among the present invention, preferably beginning temperature by the heat absorption of the endothermic peak of the expression fusing point in the calorimetric temperature-rise period of differential scanning type is the nonwoven fabric that 160 ℃～260 ℃ continuous fibers is made.If heat absorption beginning temperature, then has generation less than 160 ℃ by cause sagging of plastic deformation or situation about peeling off, and is therefore not ideal enough.When surpassing 260 ℃, then have the situation of setting (set) the property difference when being shaped.In addition, owing to need at high temperature carry out nonwoven fabric in the nonwoven fabric manufacturing process heat treated when forming, therefore have the become situation of disadvantageous problem of energy aspect of saving that is created in.It is 170 ℃～220 ℃ that preferred heat absorption of the present invention begins temperature, more preferably 180 ℃～210 ℃.
And, be not particularly limited though constitute the Tm of fiber of the present invention, yet, just can reduce fusing beginning temperature preferably by being made as 220 ℃～250 ℃, thus the heat treated can reduce nonwoven fabric and form the time, thereby becoming favourable aspect the energy saving.
Among the present invention, on described aromatic polyester, the heat absorption of the endothermic peak of the expression fusing point in can satisfying the calorimetric temperature-rise period of differential scanning type begins temperature and reaches in 160 ℃～260 ℃ the scope of composition, also can copolymerization other the 3rd composition, making the Tm of high-melting-point aromatic polyester is 220～250 ℃, gives lower slightly modulus.For example, as other the 3rd composition, concerning sour composition, can enumerate copolymerization M-phthalic acid, adipic acid, decanedioic acid, the ternary polyester of glutaric acid grade in an imperial examination; As diol component, the polyester of diol components such as diethylene glycol (DEG), neopentyl glycol, butanediol/ethylene glycol of can having enumerated copolymerization.In addition, also can be with copolymerization aromatic polyester or aliphatic polyester mix and make it the moment copolymerization of fusion.
And, among the present invention, in the scope that does not reduce performance, can utilize other resinous principle or the interpolation of deodorization antiseptic, deodorant, mould inhibitor, colouring agent, aromatic, fire retardant, plasticizer, phase solvent etc. to carry out giving of various functions.
Nonwoven fabric preferred spunbonded type nonwoven fabric of the present invention is the nonwoven fabric of being made by the continuous fibers that constitutes with described polyester, and wherein, during 120 ℃ of this nonwoven fabric heating, percentage elongation extends 5% o'clock the every g/m of load more than 40% below 100%
2Weight per unit area below 0.2N/50mm.Nonwoven fabric of the present invention is useful nonwoven fabric as the back boxing base fabric of door trim bar (door trim) etc., with this motion as one of main purpose.For the door trim bar, usual way is, the inboard of the skin material from embed mould, padded coaming, adhering film/nonwoven fabric laminate body is injected molten resin and utilized injection moulding to make.At this moment, the back boxing base fabric need carry out die forming as follows,, in the injection because of molten resin, and along warpage the time, stops the damage of molten resin to padded coaming and epidermis that is.
The back boxing base fabric is when being pressed into resin, because easily along die deformation, the extensibility during therefore as heating preferably reduces the initial stage resistance to stretching, extension and elongation.Find among the present invention, just can realize by limiting extensibility with the percentage elongation in 120 ℃ of whens heating and 5% o'clock load of elongation.That is, among the present invention, when being preferably in 120 ℃ of this nonwoven fabric heating, vertically reach horizontal percentage elongation 40% or more below 100%, extend 5% o'clock vertically reach the horizontal every g/m of load
2Weight per unit area is below 0.2N/50mm.If the percentage elongation in 120 ℃ of whens heating then can be along mold shape less than 40%, the back boxing base fabric is damaged or arch upward, thereby the situation that produces gauffer is arranged, and is therefore not ideal enough.In addition, the every g/m of load when the elongation 5% in 120 ℃ of whens heating
2When weight per unit area surpasses 0.2N/50mm, being difficult to follow mold shape, even percentage elongation is also arching upward more than 40% easily, is unfavorable therefore.When surpassing 100%, owing to be easy to generate sagging or lax, gauffer, therefore not ideal enough.Preferred percentage elongation of the present invention is 45%～90%, more preferably 50%～80%.In addition, the every g/m of weight per unit area during preferred elongation 5% of the present invention
2Load be 0.10N/50mm～0.001N/50mm, more preferably 0.05N/50mm～0.005N/50mm.
As door trim bar purposes,, can recommend the laminated structure of compacted zone and thick close layer as the most preferred embodiment among the present invention.Compacted zone can stop and is pressed into molten resin from the epidermal area of nonwoven fabric side direction resin and the leakage of cushion, and thick close layer can be assisted and is pressed into molten resin and improve shape to the diffusion of mould and form property.As the most preferred embodiment among the present invention, for example can following spun-bonded nonwoven fabric be shown example, that is, used the apparent density of the flat cross section yarn of 0.5dtex to be 0.1g/cm compacted zone
3Spun-bonded nonwoven fabric, thick close layer used the apparent density of the odd-shaped cross section yarn of 3.4dtex to be 0.05g/cm
3Spun-bonded nonwoven fabric carried out interleaving treatment with water jet looms.Though the weight per unit area of each layer is not particularly limited, however the preferred 20g/m of the weight per unit area of compacted zone for example
2～80g/m
2, the preferred 50g/m of thick close layer
2～100g/m
2Though fibre number also is not particularly limited, yet for the preferred 0.5dtex～3dtex of compacted zone, the preferred 1dtex～10dtex of thick close layer.
Though constituting the filamentary fiber number of spun-bonded nonwoven fabric of the present invention is not particularly limited, yet as automobile interior trim material back boxing base fabric purposes, in order to give flexibility and reinforcing function or shielding function effectively, below the preferred 15dtex, more preferably 0.5dtex～8dtex.The filamentary cross sectional shape that constitutes spun-bonded nonwoven fabric of the present invention can use circular section or odd-shaped cross section etc., though be not particularly limited, yet as automobile interior trim back boxing base fabric purposes, in order to give flexibility and reinforcing function or shielding function effectively, can recommend flat cross section etc.In addition, requiring to recommend hollow section or odd-shaped cross section etc. under the situation of bulkiness.
Be not particularly limited though constitute the joint form of the fiber of spun-bonded nonwoven fabric of the present invention, however in order to stop soaking into of molten resin, preferably fine and close structure, for example embossing processing is appropriate.When to the processing of embossing processing request point, surface smoothing, preferred planar (plain) processing.When the thick and fluffy material of needs, acupuncture processing is appropriate.
Though the thickness of spun-bonded nonwoven fabric of the present invention is not particularly limited, be best thickness yet preferably select for using the position.For example, in door trim bar purposes, in order to keep shaping resin shielding function and reinforcing function, preferred 0.3mm～1mm.For the material of roof plate purposes, since the cementability of attention and top board, therefore preferred 0.1mm～0.3mm.The inner decoration material of truck is owing to need sound insulation and absorption of vibrations function, therefore preferred 3mm～5mm.
Though the weight per unit area of spun-bonded nonwoven fabric of the present invention is not particularly limited, be best weight per unit area yet preferably select for using the position.For example, in door trim bar purposes, in order to keep shaping resin shielding function and reinforcing function, preferred 30g/m
2～100g/m
2For the material of roof plate purposes, since the cementability of attention and top board, therefore preferred 15g/m
2～30g/m
2The inner decoration material of truck is owing to need sound insulation and absorption of vibrations function, therefore preferred 100g/m
2～300g/m
2
Below will provide an example of the method for making of nonwoven fabric of the present invention.
Be recommended in intrinsic viscosity be 1.20～1.80 polybutylene terephthalate (PBT) (following brief note is PBT) or intrinsic viscosity be 0.8～1.6 polytrimethylene-terephthalate with in polyethylene terephthalate for example copolymerization the fusing point of glycol of 30 moles of % be vacuumize when 180 ℃ aromatic polyester (PET copolymer) mixes, be made as below the 0.003 weight % to major general's regain and be used for spinning.Preferred regain among the present invention is below the 0.002 weight %.When omitting drying process, when from air vent, moisture being removed, be recommended in the method for with high vacuum moisture being removed soon after reaching soon before the fusion in the extruder in the spinning stage.
Next, utilize well-established law to carry out melt spinning.Spinning temperature recommend the fusing point than polybutylene terephthalate (PBT) high 15 ℃～40 ℃ temperature.Preferred recommend high 25 ℃～temperature of 35 ℃.From aperture with when the molten polymer ejection, among the present invention, can recommend the aperture that can set shear rate higher.Since by improving shear rate, just can realize simulating the sheath cored structureization, therefore preferred especially.Preferred shear rate is 500/ second～5000/ second, more preferably 1500/ second～4000/ second.Owing to when shear rate surpasses 10000/ second, then can produce abnormal flow, the fracture strength of fiber reduces, and is therefore not ideal enough.The best optimised quantity that is made as the fiber number that reaches required accordingly with structure formation that has improved shear rate and draw rate of spray volume.
Among the present invention and since preferred fiber number be 0.5dtex to 8dtex, if therefore draw rate is 4000m/ minute, then the spray volume of each single hole preferably is made as 0.2g/ minute～3.2g/ minute.The nozzle of ejection both can be the little nozzle of multiple row that essential number is set, and also can use a slice nozzle with multiple row hole.Refinement in fusion lines cooling that will be sprayed and tractive.In the spun-bond process, utilize the injector tractive with air exhauster function, it is online that runout is deposited in conveyance, forms the knitmesh of opening fine stacked with state at random fiber alignment.At this moment, fiber postpones to restore in the elastic recovery boundary, thereby has the form retentivity of nonwoven fabric to reduce and the situation of the property handled variation.Thus, among the present invention, strong recommend by suppress to open fine stacked immediately the delay of knitmesh restore and the method that the knitmesh form is fixing.Specifically, can illustration utilize the immobilized method of sandwiching of tractive net, utilize the process for fixation of pressure roller.Utilize this method, the form retentivity of nonwoven fabric will improve significantly.The fibre weight that the institute runout is piled up and tractive net spee are adjusted into the single face area weight that reaches required and the runout accumulation accordingly.
Pile up under the certain situation of ribbon number at runout, when accelerating the tractive net spee, the fiber of then being opened fine will demonstrate the probability of arranging along the direct of travel (following brief note is MD) of net and become many tendencies.Just can adjust at random state by increasing ribbon number that runout piles up in such cases, productivity is further improve also.In the operation that tractive knitmesh forms, need also consider essential thickness adjustment.
Then, lamination knitmesh is by continuously or discontinuous enforcement acupuncture processing or complexings processing such as embossing processing or current interleaving treatment.In the acupuncture processing, preferably and density and complexation strength accordingly with pin number density or aciculiform shape optimization.In the embossing shape, corresponding with the essential function of nonwoven surface, the embossing shape is selected the shape of required some shape or the bests such as density or flat shape and handled.Among the present invention, the temperature of embossing processing is for preferred 180 ℃～220 ℃ of PTT or PBT, the preferred 20kN/m～200kN/m of linear pressure.The current interleaving treatment is handled single or double as required.Preferred 2MPa～the 10MPa of water flow pressure, because it is if low excessively pressure, then complexing effect is little, when too high, then can produce the damage of fiber, therefore not ideal enough.Among the present invention, it is particularly preferred embodiment in the laminated structure of compacted zone and thick close layer is integrated that current interweave.
The spun-bonded nonwoven fabric that has carried out acupuncture processing and/or embossing processing and/or current interleaving treatment of the present invention that so obtains can directly provide with base fabric as various automobile interior trim materials.Among the present invention, can in the scope that does not reduce performance, begin to be processed as formed body, give in the stage arbitrarily of commercialization that deodorization is antibiotic, the processed of smelly, the mildew-resistant of disappearing, function imparting agent such as painted, fragrant, fire-retardant etc. from the resin manufacture process.And the illustration among the present invention is not limited to these.
Embodiment
Below, use embodiment and comparative example, the present invention is specifically described, the characteristic value in embodiment and the comparative example utilizes following method to measure.
＜fusing point 〉
Utilize differential scanning type calorimeter, the endotherm peak temperature that will make it the heat absorption phenomenon that produces because of fusion when heating up with 20 ℃/minute from 20 ℃ to 300 ℃ is as fusing point.
＜heat absorption beginning temperature 〉
The temperature of heat absorption pattern (pattern) beginning that produces when being described fusing point test.Get the tangent line of heat absorption pattern and baseline, be made as the temperature that begins by tangent line heat absorption pattern.
The fiber number of＜fiber 〉
Measure according to JIS-L1015 (1999).
The weight per unit area of＜nonwoven fabric 〉
Measure according to JIS-L1906 (2000).
The thickness of＜nonwoven fabric 〉
Measure according to JIS-L1906 (2000).
The TENSILE STRENGTH of＜nonwoven fabric and percentage elongation 〉
Measure according to JIS-L1906 (2000).
The load during elongation 5% of the weight per unit area of＜nonwoven fabric 〉
According to distortion/curve of load of measuring according to JIS-L1906 (2000), measured the load when giving 5% elongation strain.
TENSILE STRENGTH and percentage elongation in 120 ℃ of atmosphere of＜nonwoven fabric 〉
According to JIS-L1906 (2000), under 120 ℃ of heating atmosphere, measure.
The load during elongation 5% of the per unit area weight in 120 ℃ of atmosphere of＜nonwoven fabric 〉
According to JIS-L1906 (2000),, measured the load when giving 5% elongation strain according to distortion/curve of load of measuring under 120 ℃ of heating atmosphere.
(embodiment 1)
100 parts of terephthalic acid (TPA)s (following brief note is TPA), 40 parts of ethylene glycol (following brief note is EG), 15 parts of neopentyl glycols (following brief note is NPG) and a spot of catalyst are added, after utilizing well-established law to carry out ester exchange-polymerization, make particle, obtained the aromatic series copolyester A (following brief note is COPES-A) of 178 ℃ of fusing points, intrinsic viscosity 0.780.70 parts of TPA100 parts, 1,4 butanediol (following brief note is BG) and a spot of catalyst are added, utilize well-established law to carry out ester exchange-polymerization after, make particle, obtained the PBT-A of 230 ℃ of fusing points, intrinsic viscosity 1.205.
COPES-A10 part, PBT-A90 part are dropped into the rotary type vacuum drying machine, carry out combination drying (being dried to regain is 0.002 weight %), be used for spinning.Under 260 ℃ of spinning temperatures, from the nozzle of hole diameter φ 0.20mm, with the spinning in 0.7g/ minute of single hole spray volume, 50mm sentences wind speed 0.5m/ and blows 20 ℃ air and ceaselessly cooling second under the nozzle, tractive when attracting with 4100m/ minute speed of silk speed with the injector of being located at the point of 0.8m under the nozzle, 1.5m point place under nozzle carries out runout and piles up stacked under state from fibre bundle to the tractive wire side that is moving with 50m/ minute speed that untie.Being laminated in knitmesh on the wire side is carried out precommpression by interim pressure roller immediately and is wound on the pulling roll.Then, the nonwoven fabric of reeling is carried out embossing processing with linear pressure 50kN/m with the some knurling rolls of 4mm spacing under 210 ℃, obtained spun-bonded nonwoven fabric.
The thickness of the embossing processing spun-bonded nonwoven fabric of gained is 0.17mm, and weight per unit area is 25g/m
2, vertically load is 0.5N/5cm during the elongation 5% of the per unit area weight of (MD), TENSILE STRENGTH is 40N/5cm, percentage elongation is 25%, laterally load is 0.4N/5cm during the elongation 5% of the per unit area weight of (CD), and TENSILE STRENGTH is 30N/5cm, and percentage elongation is 28%.The fiber number that constitutes the fiber of nonwoven fabric is 1.7dtex, and fusing point is 226 ℃, and flow starting temperature is 198 ℃, and the major part of interfibrous contact point engages.
Performance to the spun-bonded nonwoven fabric of gained is estimated with the situation that is applied to material of roof plate.Stacked adhesive linkage/paraffin layer/adhesive linkage/glass layer on spun-bonded nonwoven fabric/heat-insulating sound-insulating layer/glass layer/adhesive linkage/epidermal area and being located in the mould, will 130 ℃ down hot formed material of roof plate be bonded on the top board of car body.The material of roof plate of gained do not arch upward, the oozing out of sagging, damaged, resin, concavo-convex, meets the top board shape, is the second best in quality top board.That is, embodiment 1 satisfies whole important documents of invention, demonstrates good performance as the back boxing base fabric in the material of roof plate.
(embodiment 2)
Except having used 5 parts of COPES-A, 95 parts of PBT, the carrying out that obtains in the same manner with embodiment 1 thickness of spun-bonded nonwoven fabric of embossing processing be 0.17mm, weight per unit area is 25g/m
2, vertically load is 0.6N/5cm during the elongation 5% of the per unit area weight of (MD), TENSILE STRENGTH is 39N/5cm, percentage elongation is 24%, laterally load is 0.3N/5cm during the elongation 5% of the per unit area weight of (CD), and TENSILE STRENGTH is 26N/5cm, and percentage elongation is 27%.The fiber number that constitutes the fiber of nonwoven fabric is 1.7dtex, and fusing point is 229 ℃, and flow starting temperature is 204 ℃, and the major part of interfibrous contact point engages.
Carried out the performance evaluation of the spun-bonded nonwoven fabric of gained in the same manner with embodiment 1.The material of roof plate of gained do not arch upward, the oozing out of sagging, damaged, resin, concavo-convex, meets the top board shape, is the second best in quality top board.That is, embodiment 2 satisfies whole important documents of invention, demonstrates good performance as the back boxing base fabric in the material of roof plate.
(comparative example 1)
Except having used 100 parts of PBT, the carrying out that obtains in the same manner with embodiment 1 thickness of spun-bonded nonwoven fabric of embossing processing be 0.17mm, weight per unit area is 25g/m
2, vertically load is 0.4N/5cm during the elongation 5% of the per unit area weight of (MD), TENSILE STRENGTH is 27N/5cm, percentage elongation is 20%, laterally load is 0.2N/5cm during the elongation 5% of the per unit area weight of (CD), and TENSILE STRENGTH is 19N/5cm, and percentage elongation is 25%.The fiber number that constitutes the fiber of nonwoven fabric is 1.7dtex, and fusing point is 230 ℃, and flow starting temperature is 213 ℃, and the over half of interfibrous contact point engages.
In material of roof plate, carried out the performance evaluation of the spun-bonded nonwoven fabric of gained in the same manner with embodiment 1.Though the material of roof plate of gained do not arch upward, the oozing out of sagging, damaged, resin, concavo-convex, yet the part of the lining applying situation difference of nonwoven fabric has appearred at a position in corner.Slightly poor with the uniformity of top board shape, be that quality is the top board of permissible range.That is, though comparative example 1 except the composition difference of fiber, satisfies the strong percentage elongation characteristic of nonwoven fabric of the present invention, however slightly poorer as the performance of the back boxing base fabric in the material of roof plate than the present invention nonwoven fabric.
(comparative example 2)
Except having used 6,5 parts of NYLON610 of 95 parts of nylon, the carrying out that obtains in the same manner with embodiment 1 thickness of spun-bonded nonwoven fabric of embossing processing be 0.15mm, weight per unit area is 25g/m
2, vertically load is 0.4N/5cm during the elongation 5% of the per unit area weight of (MD), TENSILE STRENGTH is 37N/5cm, percentage elongation is 92%, laterally load is 0.2N/5cm during the elongation 5% of the per unit area weight of (CD), and TENSILE STRENGTH is 24N/5cm, and percentage elongation is 100%.The fiber number that constitutes the fiber of nonwoven fabric is 1.7dtex.
In material of roof plate, carried out the performance evaluation of the spun-bonded nonwoven fabric of gained in the same manner with embodiment 1.Though the material of roof plate of gained does not arch upward, the oozing out of damaged, resin, concavo-convex, yet that the part has occurred is sagging.Slightly poor with the uniformity of top board shape, be the top board that quality slightly breaks away from permissible range.That is, though comparative example 2 except the composition difference of fiber, satisfies the strong percentage elongation characteristic of nonwoven fabric of the present invention, however poorer as the performance of the back boxing base fabric in the material of roof plate than nonwoven fabric of the present invention.
(comparative example 3)
70 parts of TPA, 30 parts of M-phthalic acids (following brief note is IPA), 65 parts of EG and a spot of catalyst are added, utilize well-established law to carry out ester exchange and polymerization, obtained the copolyester (following brief note is COPES-B) of 152 ℃ of fusing points.Except using 25 parts of COPES-B, 75 parts of PBT, the carrying out that obtains in the same manner with embodiment 1 thickness of spun-bonded nonwoven fabric of embossing processing be 0.15mm, weight per unit area is 25g/m
2, vertically load is 0.8N/5cm during the elongation 5% of the per unit area weight of (MD), TENSILE STRENGTH is 46N/5cm, percentage elongation is 12%, laterally load is 0.6N/5cm during the elongation 5% of the per unit area weight of (CD), and TENSILE STRENGTH is 37N/5cm, and percentage elongation is 18%.And the flow starting temperature of fiber is 137 ℃, and distortion beginning temperature is step-down also.
In material of roof plate, carried out the performance evaluation of the spun-bonded nonwoven fabric of gained in the same manner with embodiment 1.Arching upward of bight and breakage concavo-convex, the back boxing base fabric have taken place in the material of roof plate of gained.Also poor with the uniformity of top board shape, be the top board that quality breaks away from permissible range.That is, the performance of the back boxing base fabric used of the material of roof plate of comparative example 3 is poorer than nonwoven fabric of the present invention.
(comparative example 4)
Except the PET that used 97 parts of intrinsic viscosities 0.63,3 parts of COPES-B, the carrying out that obtains in the same manner with embodiment 1 thickness of spun-bonded nonwoven fabric of embossing processing be 0.14mm, weight per unit area is 25g/m
2, vertically load is 1.4N/5cm during the elongation 5% of the per unit area weight of (MD), TENSILE STRENGTH is 58N/5cm, percentage elongation is 12%, laterally load is 1.2N/5cm during the elongation 5% of the per unit area weight of (CD), and TENSILE STRENGTH is 44N/5cm, and percentage elongation is 16%.And the flow starting temperature of fiber is 149 ℃, and distortion beginning temperature is no problem temperature.In material of roof plate, carried out the performance evaluation of the spun-bonded nonwoven fabric of gained in the same manner with embodiment 1.Arching upward of bight and concavo-convex taken place in the material of roof plate of gained, and the stretching, extension of back boxing base fabric also becomes inadequate state.Also poor with the uniformity of top board shape, be the top board that quality breaks away from permissible range.That is, the performance of the back boxing base fabric used of the material of roof plate of comparative example 4 is poorer than nonwoven fabric of the present invention.
(comparative example 5)
Except only embossing processing being made as precreping, the thickness of the spun-bonded nonwoven fabric that obtains in the same manner with comparative example 4 is 0.9mm, and weight per unit area is 25g/m
2, vertically load is 0.05N/5cm during the elongation 5% of the per unit area weight of (MD), TENSILE STRENGTH is 11N/5cm, percentage elongation is 143%, laterally load is 0.04N/5cm during the elongation 5% of the per unit area weight of (CD), and TENSILE STRENGTH is 8N/5cm, and percentage elongation is 165%.And the flow starting temperature of fiber is 149 ℃, and distortion beginning temperature is no problem temperature.
In material of roof plate, carried out the performance evaluation of the spun-bonded nonwoven fabric of gained in the same manner with embodiment 1.The breakage of arching upward of bight and concavo-convex, sagging and back boxing base fabric and bonding agent oozing out of substrate cloth inwards taken place in the material of roof plate of gained.Also poor with the uniformity of top board shape, be the top board that quality breaks away from permissible range.That is, though comparative example 5 has improved the elongation of back boxing base fabric, yet the performance of the back boxing base fabric that material of roof plate is used is poorer than nonwoven fabric of the present invention.
Can be clear that according to embodiment 1～2, comparative example 1～5, spun-bonded nonwoven fabric of the present invention is by at aromatic polyester (fusing point: contain the nonwoven fabric that the continuous fibers of the aromatic series copolyester (fusing point: Tm2=150 ℃-(Tm1-20 ℃)) of 1～15 weight % is made Tm1), by being made as following formation, promptly, the percentage elongation of this nonwoven fabric is more than 20% below 100%, and the load of extending 5% o'clock is every g/m
2Weight per unit area is below 1.2N/50mm, just can obtain following spun-bonded nonwoven fabric, promptly, has good low modulus, keep high extensibility, good especially aspect shaping processability, tracking property, also good aspect the DIMENSIONAL STABILITY after shaping, be specially adapted to automobile interior trim material back boxing base fabric.
(embodiment 3)
100 parts of terephthalic acid (TPA)s (following brief note is TPA), 40 parts of ethylene glycol (following brief note is EG), 15 parts of neopentyl glycols (following brief note is NPG) and a spot of catalyst are added, after utilizing well-established law to carry out ester exchange-polymerization, make particle, obtained the aromatic series copolyester A (following brief note is COPES-A) of 178 ℃ of fusing points, intrinsic viscosity 0.780.
70 parts of TAP100 parts, 1,4 butanediol (following brief note is BG) and a spot of catalyst are added, utilize well-established law to carry out ester exchange-polymerization after, make particle, obtained the PBT of 230 ℃ of fusing points, intrinsic viscosity 1.205.
COPES-A10 part, PBT90 part are dropped into the rotary type vacuum drying machine, carry out combination drying (being dried to regain is 0.002 weight %), be used for spinning.Under 260 ℃ of spinning temperatures, from the nozzle of hole diameter φ 0.23mm, with the spinning in 0.7g/ minute of single hole spray volume, 50mm sentences wind speed 0.5m/ and blows 20 ℃ air and ceaselessly cooling second under the nozzle, tractive when attracting with 4100m/ minute speed of silk speed with the injector of being located at the point of 0.8m under the nozzle, 1.5m point place under nozzle carries out runout and piles up stacked under state from fibre bundle to the tractive wire side that is moving with 50m/ minute speed that untie.Being laminated in knitmesh on the wire side is carried out precommpression by interim pressure roller immediately and is wound on the pulling roll.
Then, the nonwoven fabric of reeling is carried out embossing processing with linear pressure 50kN/m with the some knurling rolls of 6mm spacing under 210 ℃, obtained spun-bonded nonwoven fabric.The thickness of the embossing processing spun-bonded nonwoven fabric of gained is 0.7mm, and weight per unit area is 115g/m
2The TENSILE STRENGTH of vertical (MD) under 120 ℃ of atmosphere is 30N/50mm, percentage elongation is 75%, load is 0.02N/50mm during the elongation 5% of per unit area weight, and the TENSILE STRENGTH of transverse direction (CD) is that 25N/50mm, percentage elongation are 81%, load is 0.01N/50mm during the stretching 5% of per unit area weight.The fiber number that constitutes the fiber of nonwoven fabric is 1.7dtex, and fusing point is 226 ℃, and heat absorption beginning temperature is 189 ℃, and interfibrous complexing is made of the formed point of embossing.Performance to the spun-bonded nonwoven fabric of gained is estimated with the situation that is applied to the door trim strip material.Stacked adhesive linkage/cushion (polyurathamc)/adhesive linkage/epidermal area on spun-bonded nonwoven fabric and being located in the mould utilizes well-established law with 200 ℃ polypropylene solution dyeing resin, has made the door trim bar.
The skin material of the door trim bar of gained part do not arch upward, sagging, damaged, gauffer, concavo-convex, transverse leakage, epidermal area and cushion peeled off and after studying, there be not resin oozing out to nonwoven surface yet, resin bed and nonwoven layer are connected airtight fully, are the second best in quality door trim bars.That is, embodiment 3 satisfies whole important documents of invention, demonstrates good performance as the back boxing base fabric of door trim bar.
(embodiment 4)
TPA100 part, BG70 part and a spot of catalyst are added; utilize well-established law to carry out after the ester exchange; 0.3 part of the polytetramethylene glycol (polytetramethylene glycol, following brief note are PTMG) that adds molecular weight 1000 and after stirring; polymerization and granulating have obtained the aromatic series copolyester A (following brief note is COPES-B) of 226 ℃ of fusing points, intrinsic viscosity 1.580.
After the COPES-B drying with gained, be used for spinning.Under 260 ℃ of spinning temperatures, from hole shape is the nozzle of slit pore of wide 0.04mm, long 0.40mm, with the spinning in 0.3g/ minute of single hole spray volume, 50mm sentences wind speed 0.5m/ and blows 20 ℃ air and ceaselessly cooling second under the nozzle, tractive when attracting with 4000m/ minute speed of silk speed with the injector of being located at the point of 0.8m under the nozzle, 1.5m point place under nozzle carries out runout and piles up stacked under the state of the tractive wire side that is moving with 45m/ minute speed being untied fibre bundle.Being laminated in knitmesh on the wire side is carried out precommpression by interim pressure roller immediately and is wound on the pulling roll.The weight per unit area of the nonwoven fabric of gained (B1) is 40g/m
2, filamentary average fineness is 0.75dtex.
Use the drying that obtains among the embodiment 3 PBT, under 260 ℃ of spinning temperatures, from the nozzle of hole diameter φ 0.30mm, with the spinning in 1.5g/ minute of single hole spray volume, 50mm sentences wind speed 0.5m/ and blows 20 ℃ air and ceaselessly cooling second under the nozzle, tractive when attracting with 4600m/ minute speed of silk speed with the injector of being located at the point of 0.8m under the nozzle, 1.5m point place under nozzle carries out runout and piles up stacked under state from fibre bundle to the tractive wire side that is moving with 65m/ minute speed that untie.Being laminated in knitmesh on the wire side is carried out precommpression by interim pressure roller immediately and is wound on the pulling roll.The weight per unit area of the nonwoven fabric of gained (B2) is 80g/m
2, filamentary fiber number is 3.3dtex.
Then, nonwoven fabric B1 and B2 is stacked, place on speed 50m/ minute the conveyer belt, from between nozzle bore 0.15mm, hole the injection nozzle of spacing 8mm, current in order to pressure 3MPa pressurization carry out interleaving treatment, after the drying, carry out embossing processing at 180 ℃, linear pressure 20kN/m, obtained stacked spun-bonded nonwoven fabric with straight roll.The thickness of the spun-bonded nonwoven fabric of gained is 0.9mm, and weight per unit area is 120g/m
2The TENSILE STRENGTH of vertical (MD) under 120 ℃ of atmosphere is 26N/50mm, percentage elongation is 85%, load is 0.01N/50mm during the elongation 5% of per unit area weight, laterally the TENSILE STRENGTH of (CD) is 21N/50mm, percentage elongation is 92%, and load is 0.07N/50mm during the elongation 5% of per unit area weight.The fiber number that constitutes the fiber of nonwoven fabric is 0.75dtex and 3.3dtex, and fusing point is 226 ℃ and 226 ℃, and heat absorption beginning temperature is 181 ℃ and 197 ℃, and interfibrous complexing is by the current joint that interweaves.In the same manner the performance of the spun-bonded nonwoven fabric of gained is estimated with the situation that is applied to the door trim strip material with embodiment 3.
The skin material of the door trim bar of gained part do not arch upward, sagging, damaged, gauffer, concavo-convex, transverse leakage, epidermal area and cushion peeled off and after studying, there be not resin oozing out to nonwoven surface yet, resin bed and nonwoven layer are connected airtight fully, are the second best in quality door trim bars.That is, embodiment 4 satisfies whole important documents of invention, demonstrates good performance as the back boxing base fabric of door trim bar.
(embodiment 5)
60 parts of TPA100 parts, propylene glycol (trimethylene, following brief note are TG) and a spot of catalyst are added, utilize well-established law to carry out after the ester exchange, polymerization and granulating have obtained the PTT of 221 ℃ of fusing points, intrinsic viscosity 1.310.
After the PTT drying with gained, under 255 ℃ of spinning temperatures, from embodiment 4 in the nozzle of used slit pore, with the spinning in 0.25g/ minute of single hole spray volume, 50mm sentences wind speed 0.5m/ and blows 20 ℃ air and ceaselessly cooling second under the nozzle, tractive when attracting with 4000m/ minute speed of silk speed with the injector of being located at the point of 0.8m under the nozzle, 1.5m point place under nozzle carries out runout and piles up stacked under state from fibre bundle to the tractive wire side that is moving with 45m/ minute speed that untie.Being laminated in knitmesh on the wire side is carried out precommpression by interim pressure roller immediately and is wound on the pulling roll.The weight per unit area of the nonwoven fabric of gained (C1) is 40g/m
2, filamentary fiber number average out to 0.65dtex.
The nonwoven fabric B2 and the C1 that obtain among the embodiment 4 is stacked, carry out current interleaving treatment and embossing processing in the same manner with embodiment 4 and the thickness of the lamination spun-bonded nonwoven fabric that obtains is 0.8mm, weight per unit area is 120g/m
2The TENSILE STRENGTH of vertical (MD) under 120 ℃ of atmosphere is 29N/50mm, percentage elongation is 78%, load is 0.02N/50mm during the elongation 5% of per unit area weight, laterally the TENSILE STRENGTH of (CD) is 24N/50mm, percentage elongation is 87%, and load is 0.01N/50mm during the elongation 5% of per unit area weight.The fiber number that constitutes the fiber of nonwoven fabric is 0.65dtex and 3.3dtex, and fusing point is 221 ℃ and 226 ℃, and heat absorption beginning temperature is 182 ℃ and 189 ℃, and interfibrous complexing is by the current joint that interweaves.In the same manner the performance of the lamination spun-bonded nonwoven fabric of gained is estimated with the situation that is applied to the door trim strip material with embodiment 3.
The skin material of the door trim bar of gained part do not arch upward, sagging, damaged, gauffer, concavo-convex, transverse leakage, epidermal area and cushion peeled off and after studying, there be not resin oozing out to nonwoven surface yet, resin bed and nonwoven layer are connected airtight fully, are the second best in quality door trim bars.That is, embodiment 5 satisfies whole important documents of invention, demonstrates good performance as the back boxing base fabric of door trim bar.
(comparative example 6)
Except using the PET of intrinsic viscosity 0.68, spinning temperature is made as 285 ℃, from the nozzle of aperture 0.35mm with single hole spray volume 2.5g/ minute, draw rate 4800m/ minute spinning, carrying out under 240 ℃, linear pressure 50kN/m beyond the embossing processing at interval with some 5mm, the thickness of the embossing processing spun-bonded nonwoven fabric that obtains in the same manner with embodiment 3 is 0.7mm, and weight per unit area is 110g/m
2The TENSILE STRENGTH of vertical (MD) under 120 ℃ of atmosphere is 192N/50mm, percentage elongation is 38%, load is 0.81N/50mm during the elongation 5% of per unit area weight, laterally the TENSILE STRENGTH of (CD) is 114N/50mm, percentage elongation is 67%, and load is 0.33N/50mm during the elongation 5% of per unit area weight.The fiber number that constitutes the fiber of nonwoven fabric is 5.2dtex, and fusing point is 256 ℃, and heat absorption beginning temperature is 237 ℃, and interfibrous complexing is engaged by the formed point of embossing.In the same manner the performance of the embossing of gained processing spun-bonded nonwoven fabric is estimated with embodiment 3.
The skin material of the door trim bar of gained has partly taken place to arch upward, gauffer, concavo-convex, epidermal area and cushion are peeled off and after studying, has also been produced resin oozing out to nonwoven surface around injection part.Engage though resin bed connects airtight fully with nonwoven layer, yet be the door trim bar of the non-constant of quality.That is, therefore comparative example 6 demonstrates the performance of non-constant owing to be discontented with most of important document of unabridged version invention as the back boxing base fabric of door trim bar.
(comparative example 7)
5 parts of TPA100 parts, 30 parts of M-phthalic acids, EG70 part, diethylene glycol (DEG) (following brief note is DEG) and a spot of catalyst are added together, utilize well-established law to carry out ester exchange-polymerization after, obtained aromatic series copolyester (COPES-C).The fusing point of the COPES-C of gained is that 184 ℃, intrinsic viscosity are 0.61, and fusing beginning temperature is 137 ℃.
Except used the carrying out that obtain in the same manner with embodiment 3 COPES-C thickness of spun-bonded nonwoven fabric of embossing processing be 0.6mm, weight per unit area is 115g/m
2The TENSILE STRENGTH of vertical (MD) under 120 ℃ of atmosphere is 24N/50mm, percentage elongation is 95%, load is 0.006N/50mm during the elongation 5% of per unit area weight, laterally the TENSILE STRENGTH of (CD) is 18N/50mm, percentage elongation is 101%, and load is 0.004N/50mm during the elongation 5% of per unit area weight.The fiber number that constitutes the fiber of nonwoven fabric is 1.2dtex, and fusing point is 184 ℃, and heat absorption beginning temperature is 137 ℃, and interfibrous complexing utilizes embossing to engage.In the same manner the performance of the spun-bonded nonwoven fabric of gained is estimated with embodiment 3.The resin leakage of the skin material part of the door trim bar of gained is obvious, and gauffer, concavo-convex has also taken place.With epidermal area with cushion peels off and after studying, resin oozes out clearly to nonwoven surface.Engage though resin bed connects airtight fully with nonwoven layer, yet be the door trim bar of the non-constant of quality.That is, because comparative example 7 broken away from the invention important document, flow starting temperature is low, so resin leakage becomes obviously, can't be as the back boxing base fabric use of door trim bar.
(comparative example 8)
For PBT except obtaining among the use embodiment 3, minute carried out beyond the spinning with single hole spray volume 0.30g/ minute, draw rate 2500m/, carry out precommpression and the spun-bonded nonwoven fabric of reeling with embodiment 3 obtains in the same manner, next with sending anti-60 (ペ ネ 60) to carry out acupuncture, obtained the acupuncture spun-bonded nonwoven fabric.
The thickness of the embossing processing spun-bonded nonwoven fabric of gained is 0.9mm, and weight per unit area is 115g/m
2The TENSILE STRENGTH of vertical (MD) under 120 ℃ of atmosphere is 20N/50mm, percentage elongation is 135%, load is 0.006N/50mm during the elongation 5% of per unit area weight, laterally the TENSILE STRENGTH of (CD) is 15N/50mm, percentage elongation is 151%, and load is 0.002N/50mm during the elongation 5% of per unit area weight.The fiber number that constitutes the fiber of nonwoven fabric is 1.2dtex, and fusing point is 226 ℃, and heat absorption beginning temperature is 197 ℃, and interfibrous complexing was fixed by formed interweaving of acupuncture.In the same manner the acupuncture spun-bonded nonwoven fabric of gained is applied in the door trim strip material with embodiment 3 and estimates.
The skin material of the door trim bar of gained has partly taken place to arch upward, sagging, fold.Epidermal area and cushion are being peeled off and after studying, do not had resin to the oozing out of nonwoven surface, resin bed connects airtight fully with nonwoven layer and engages, and is the slightly poor door trim bar of quality.That is,,, demonstrated relatively poor performance therefore as the back boxing base fabric of door trim bar and be not suitable for because comparative example 8 does not satisfy the part of invention important document.
Can be clear that according to embodiment 3～5, comparative example 6～9, spun-bonded nonwoven fabric of the present invention is by containing 80 moles of aromatic polyester unit more than the %, the heat absorption of the endothermic peak of the expression fusing point in the calorimetric temperature-rise period of differential scanning type begins the nonwoven fabric that temperature is made at the continuous fibers more than 160 ℃, wherein, percentage elongation during 120 ℃ of this nonwoven fabric heating extends 5% o'clock the every g/m of load more than 40% below 100%
2Weight per unit area be below the 0.2N/50mm, by being made as this kind spun-bonded nonwoven fabric, be suitable for the spunbond polyester type nonwoven fabric that in automobile interior trim material back boxing base fabric distortion becomes big door trim bar most even just can provide.
Utilize possibility on the industry
Because spun bond nonwoven fabric of the present invention is with the crystallinity height, fusing point is also more than 220 ℃, and heat is steady Qualitative good, the lower slightly polybutylene terephthalate (PBT) of modulus has improved hot forming as principal component The property, therefore by setting heat distortion temperature lower, just can be used as the following automobile inside that is suitable for The spunbond polyester type nonwoven of exterior material back boxing base fabric and providing at an easy rate namely, has good low mould Number has kept high extensibility, and is especially good aspect shaping processability, tracking property, the chi after the shaping Very little stability is also good. In addition, be set to desirable value by weight per unit area, thickness, also can To be used for the purposes beyond automobile interior trim, therefore be very beneficial for industry development.
Claims (5)
1. spun-bonded nonwoven fabric, be by contain aromatic polyester (fusing point: Tm1), be the nonwoven fabric that the continuous fibers of the aromatic series copolyester (fusing point: Tm2=150 ℃～(Tm1-20 ℃)) of 1～15 weight % is made with respect to this aromatic polyester, wherein,
The percentage elongation of this nonwoven fabric extends 5% o'clock the every g/m of load more than 20% below 100%
2Weight per unit area be below the 1.2N/50mm.
2. spun-bonded nonwoven fabric according to claim 1, wherein, the heat absorption of the endothermic peak of the expression fusing point in the calorimetric temperature-rise period of differential scanning type begins temperature more than 140 ℃.
3. spun-bonded nonwoven fabric is by containing 80 moles of aromatic polyester unit more than the %, and it is the nonwoven fabric that 160 ℃～260 ℃ continuous fibers is made that the heat absorption of the endothermic peak of the expression fusing point in the calorimetric temperature-rise period of differential scanning type begins temperature, wherein,
Percentage elongation during 120 ℃ of this nonwoven fabric heating extends 5% o'clock the every g/m of load more than 40% below 100%
2Weight per unit area be below the 0.2N/50mm.
4. according to any described spun-bonded nonwoven fabric in the claim 1～3, wherein, aromatic polyester is polybutylene terephthalate (PBT) or polytrimethylene-terephthalate.
5. according to any described spun-bonded nonwoven fabric in the claim 1～4, wherein, has the stromatolithic structure of different densities.
Applications Claiming Priority (5)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP191058/2004 | 2004-06-29 | ||
| JP191059/2004 | 2004-06-29 | ||
| JP2004191059A JP2006009215A (en) | 2004-06-29 | 2004-06-29 | Spunbonded nonwoven fabric |
| JP2004191058A JP4120883B2 (en) | 2004-06-29 | 2004-06-29 | Spunbond nonwoven fabric |
| PCT/JP2005/011796 WO2006001439A1 (en) | 2004-06-29 | 2005-06-28 | Span-bonded nonwoven fabric |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1969074A true CN1969074A (en) | 2007-05-23 |
| CN1969074B CN1969074B (en) | 2010-05-05 |
Family
ID=35776759
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN200580019559.8A Expired - Fee Related CN1969074B (en) | 2004-06-29 | 2005-06-28 | Spunbond nonwoven fabric |
Country Status (2)
| Country | Link |
|---|---|
| JP (1) | JP4120883B2 (en) |
| CN (1) | CN1969074B (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107251135A (en) * | 2015-01-30 | 2017-10-13 | 株式会社自动网络技术研究所 | Sound-absorbing material and the wire harness with sound-absorbing material |
| CN113089183A (en) * | 2014-08-22 | 2021-07-09 | 株式会社可乐丽 | Conductive nonwoven fabric and method for producing melt-blown nonwoven fabric used therein |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP6011253B2 (en) * | 2012-11-02 | 2016-10-19 | 東洋紡株式会社 | Thermocompression long-fiber nonwoven fabric with excellent moldability |
| JP7121619B2 (en) * | 2018-09-25 | 2022-08-18 | 日本製紙クレシア株式会社 | Wet tissue using composite nonwoven fabric and method for producing composite nonwoven fabric |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3307691B2 (en) | 1992-10-06 | 2002-07-24 | 東洋紡績株式会社 | Non-woven cloth |
| JP3361267B2 (en) | 1998-02-24 | 2003-01-07 | 株式会社ブリヂストン | Fiber laminated molding |
| DK1330350T3 (en) * | 2000-09-29 | 2012-06-25 | Oerlikon Textile Gmbh & Co Kg | Biodegradable non-woven copolyester cloth |
| JP4851644B2 (en) * | 2000-12-15 | 2012-01-11 | 旭化成せんい株式会社 | Long fiber nonwoven fabric with excellent moldability |
-
2004
- 2004-06-29 JP JP2004191058A patent/JP4120883B2/en not_active Expired - Fee Related
-
2005
- 2005-06-28 CN CN200580019559.8A patent/CN1969074B/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113089183A (en) * | 2014-08-22 | 2021-07-09 | 株式会社可乐丽 | Conductive nonwoven fabric and method for producing melt-blown nonwoven fabric used therein |
| CN113089183B (en) * | 2014-08-22 | 2023-10-24 | 株式会社可乐丽 | Conductive nonwoven fabric and method for producing meltblown nonwoven fabric used therein |
| CN107251135A (en) * | 2015-01-30 | 2017-10-13 | 株式会社自动网络技术研究所 | Sound-absorbing material and the wire harness with sound-absorbing material |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1969074B (en) | 2010-05-05 |
| JP2006009214A (en) | 2006-01-12 |
| JP4120883B2 (en) | 2008-07-16 |
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