CN101250817A - Stephanoporate springiness nonwoven material backing material and manufacturing method thereof - Google Patents
Stephanoporate springiness nonwoven material backing material and manufacturing method thereof Download PDFInfo
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- CN101250817A CN101250817A CNA200810070745XA CN200810070745A CN101250817A CN 101250817 A CN101250817 A CN 101250817A CN A200810070745X A CNA200810070745X A CN A200810070745XA CN 200810070745 A CN200810070745 A CN 200810070745A CN 101250817 A CN101250817 A CN 101250817A
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- nonwoven material
- blowing agent
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Abstract
The invention relates to a base material of a porous elastic unwoven material and a method for preparation thereof, wherein the unit gram weight is 80-800 g/m2 and elastic polyurethane foam 6-50 wt% is homogeneously fixed in the interior and the exterior. The method for preparation has the following steps: firstly, confecting homogeneous aqueous polyurethane dispersion which contains blowing agent, wherein the solidity is 5-60%, the viscosity is 200-2000cps/25 DEG C, and the dosage of the blowing agent is that blowing agent 1-15 parts is charged into the polyurethane dispersion 100 parts, secondly, charging the dispersion into the unwoven material via the mode of dipping single nipping and the ratio of rolling excess is 40-200%, thirdly, proceeding two or three segments heating foaming technique to obtain the base material, wherein the two segments heating foaming technique has the following steps that the heating foaming temperature is 40-60 DEG C for 2-3 min in the first step and the heating foaming temperature is 110-140 DEG C for 3-5min in the second step, the three segments heating foaming technique has the following steps that the heating temperature is 30-40 DEG C for 2-3 min in the first step, the heating temperature is 80-90 DEG C for 1-2 min in the second step, and the heating temperature is 130-140 DEG C for 3-5 min in the third step. The base material of the invention has the advantages of good rebound resilience and gas permeability.
Description
Technical field
The present invention relates to the nonwoven material technology of field of textiles, be specially a kind of height that contains polyurethane foam and return stephanoporate springiness nonwoven material backing material and manufacture method thereof, international Patent classificating number intends being Int.C1D01F1/09 (2006.01).
Background technology
Nonwoven material as a kind of fiber unordered set body with respect to other textiles have processing technology simply, inexpensive relatively advantage, use at limited number of time, short-term is used or with after can abandon and have a lot of application aspect the product.Wherein in a lot of Application Areass, the nonwoven material that needs a kind of high resilience, good permeability, nonwoven material with high resilience, gas permeability can provide the requirement of satisfying human body comfort, as can be used as better car seat, and materials such as mattress, the headrest and shoe-pad use.Regrettably, the fiber web that conventional nonwoven material mainly is made up of stiff short fiber or long filament is reinforced and is formed, resilience is limited, can not satisfy the actual needs requirement, though and by thermoplastic elastomer (TPE) directly the non-woven elastic that obtains of processing have higher stretching resilience, but because the restriction of processing technology, how based on slim, and be subject to the characteristic of material itself, gas permeability is relatively poor, cost is also higher, unfavorable promoting the use of.
Aqueous polyurethane is with the polyurethane of water as decentralized medium, and it can be made into the form of water-soluble, latex or dispersion liquid.Aqueous polyurethane has excellent filming performance, and film has softness, high elasticity, and do not fire, nontoxic, nuisanceless, do not have characteristics such as danger, resource-saving, so be widely used.Particularly aqueous polyurethane dispersing liquid can foam by machinery, physics or chemical method, foam performance tool aspect fabric post-treatment is applied for a patent 200510113473.3 coating technologies of having reported the mechanical foaming aqueous polyurethane dispersing liquid as China with using widely.Aqueous polyurethane uses as the coating of fabric in this technology, be applied to the surface of fabric, only form the poroelasticity coating at fabric face, mainly improved the outward appearance of fabric, can be used as material uses such as artificial leather, but because aqueous polyurethane does not relate to fabric to the application of fabric in this technology, can not give fabric resilience preferably, the integral, flexible of fabric and gas permeability are also undesirable.
Summary of the invention
At the deficiencies in the prior art, the technical problem that quasi-solution of the present invention is determined is to design a kind of stephanoporate springiness nonwoven material backing material and manufacture method thereof.The inside of this stephanoporate springiness nonwoven material backing material includes polyurethane foam, has whole high resilience and good gas permeability, better satisfies the demand of people to comfortableness.This manufacture method is a kind of manufacture method of stephanoporate springiness nonwoven material backing material of environmental protection, and it is easy to have a process implementing, characteristics such as cost is lower.
The technical scheme that the present invention solves described stephanoporate springiness nonwoven material backing material technical problem is, designs a kind of stephanoporate springiness nonwoven material backing material, and its unit grammes per square metre is 80～800g/m
2, and the elastic polyurethane foam of the even set 6～50wt% in inside and outside.
The technical scheme that the present invention solves described stephanoporate springiness nonwoven material backing material manufacture method technical problem is, design a kind of manufacture method of stephanoporate springiness nonwoven material backing material, it adopts following steps: at first preparation contains the homogeneous state aqueous polyurethane dispersing liquid of blowing agent, its solid content is 5～60%, viscosity is 200～2000cps/25 ℃, and the addition of described blowing agent is to add 1-15 part blowing agent in per 100 parts of polyurethane dispersing liquids; Secondly described dispersion liquid is applied on the nonwoven material base material by the mode of rolling of soaking, the base material grammes per square metre is 80～800g/m
2, pick-up is 40～200%; Carry out two-section or three segmentation foamables at last promptly, described two-section foamable technology is: first section foamable temperature is 40～60 ℃, and the time is 2～3min; Second section foamable temperature is 110～140 ℃, and the time is 3～5min; Described three segmentation foamable technologies are: first section heating-up temperature is 30～40 ℃, and the time is 2～3min; Second section heating-up temperature is 80～90 ℃, time 1～2min; The 3rd section heating-up temperature is 130～140 ℃, and the time is 3～5min.
Compared with prior art, stephanoporate springiness nonwoven material backing material of the present invention is that the adhesive that will contain blowing agent is padded on the fabric and (comprises fabric), and under suitable technology, foam, make fabric evenly contain cured foam, make base material have whole high resilience and good gas permeability characteristics, grammes per square metre that embodiment does is 500g/m
2The substrate sample Air permenbility can reach 70～120L/m
2S.Stephanoporate springiness nonwoven material backing material manufacture method of the present invention has the feature of environmental protection, and it is easy to have technology, need not new equipment, and cost is lower, promotes characteristics such as easy.
The specific embodiment
Further narrate the present invention below in conjunction with embodiment:
A kind of stephanoporate springiness nonwoven material backing material (hereinafter to be referred as base material) of the present invention's design, its unit grammes per square metre is 80～800g/m
2, preferred grammes per square metre is 200～500g/m
2, and the elastic polyurethane foam of the even set 6～50wt% in inside and outside.Base material of the present invention can be any nonwoven material base material of logical machinery, heat, chemical method reinforcing.Embodiment preferred pin spraying non-woven material base material.Described elastic polyurethane foam is originally as prior art.
The present invention has designed the manufacture method (hereinafter to be referred as manufacture method) of described stephanoporate springiness nonwoven material backing material simultaneously, and it adopts following steps:
1, preparation aqueous polyurethane dispersing liquid, preparation contains the homogeneous state aqueous polyurethane dispersing liquid of blowing agent in proportion, requiring its solid content is 5～60%, viscosity is 200～2000cps/25 ℃, and the addition of blowing agent or proportioning are to add 1-15 part blowing agent in per 100 parts of aqueous polyurethane dispersing liquids.
The compound method of the described aqueous polyurethane dispersing liquid of manufacture method of the present invention is a known technology, can adopt any known method to prepare polyurethane dispersing liquid.The described aqueous polyurethane dispersing liquid of the embodiment of the invention is to comprise polyether polyol (the amine value is 350～600mgKOH/g, and hydroxyl value is that 350～750mgKOH/g) glycol composition and organic multiple isocyanate reaction obtain by making.The suitable solid content of aqueous polyurethane dispersing liquid of the present invention is 5～60%, and preferred solid content is 15～30%; Suitable viscosity is 200～2000cps/25 ℃, and preferred viscosities is 400～800cps/25 ℃.
The described blowing agent of manufacture method of the present invention is a breakdown type chemical foaming agent commonly used at present, comprise azodiisobutyronitrile, Celogen Az, azo two carbonic acid diisopropyl fat, azodicarbonamide potassium formate, N, N-diformazan nitro five methine tetramines, N, N-dimethyl N, any one in N-dinitroso terephthaldehyde base acid amides, stearate (Stearyl Amine, odium stearate), neopelex, the sodium bicarbonate.Blowing agent is azodiisobutyronitrile preferably.The addition of blowing agent or proportioning are to add 1-15 part blowing agent in per 100 parts of aqueous polyurethane dispersing liquids; Addition is 1-10 part blowing agent preferably, and better addition is 1-5 part blowing agent.Usually, blowing agent is applied to only need carry out the aqueous polyurethane dispersing liquid that mechanical agitation disperses to obtain the homogeneous state in the polyurethane dispersing liquid.
2, soak one and roll method processing, described dispersion liquid is applied on the nonwoven material base material by soaking a mode of rolling, requiring the base material grammes per square metre is 80～800g/m
2, pick-up is 40～200%.
The base material that manufacture method of the present invention is suitable for has popularity, can be any base material of logical machinery, heat, chemical method reinforcing.Embodiment selects needled punched nonwoven material for use.Described base material grammes per square metre is 80～800g/m
2, preferred grammes per square metre is 200～500g/m
2
The described method that aqueous polyurethane dispersing liquid is put on the described base material of manufacture method of the present invention is rolled method for soaking one, comprises that soaking a roll process and two soaks two roll process.A roll process is soaked in general employing one.For increasing the resilience of treatment product, can consider that also two soak two roll process; Soaking a suitable pick-up that rolls method technology is 40～200%, and preferred pick-up is 60～120%.
3, segmentation foamable, a kind of embodiment of described segmentation foamable technology is: first section foamable temperature is 40～60 ℃, and the time is 2～3min; Second section foamable temperature is 110～140 ℃, and the time is 3～5min.Can obtain described height after the foamable drying and return stephanoporate springiness nonwoven material backing material.
The described segmentation foamable of manufacture method of the present invention technology another embodiment is: first section temperature is 30～40 ℃, and the time of staying is 2～3min; Second section temperature is 80～90 ℃, the time of staying 1～2min; The 3rd section temperature is 130～140 ℃, and the time of staying is 3～5min.
The mode of heating that the described segmentation foamable of manufacture method of the present invention can adopt is: Infrared Heating, drying cylinder heating, baking oven for heating or stentering forming drying plant.
The present invention is because blowing agent is to roll the inside and outside that even action enters into base material by soaking one, the micropore that blowing agent is decomposed to form is coated between the whole fiber of base material, thereby can give base material very high whole resilience and air permeability and good, be applicable to car seat, seat cushion, the headrest and shoe-pad, sound-absorbing material etc., satisfy the continuous pursuit of people comfortableness.
The present invention does not address part and is applicable to prior art.
Below provide specific embodiments of the invention, but the present invention is not subjected to the restriction of embodiment.
Example example 1
The preparation solid content is 15%, and viscosity is 300cps/25 ℃ polyethers flexibel polyurethane dispersion liquid, adds 2 parts of azodiisobutyronitriles and is uniformly dispersed.With the above-mentioned polyurethane dispersing liquid of blowing agent that evenly is dispersed with to 80g/m
2The terylene needled punched nonwoven material of grammes per square metre carries out soaking a roll process to be handled, and pick-up is 60%.Utilize drying cylinder to preheat 2min for 40 ℃; Enter 130 ℃ of stentering forming drying plant heating 4min again; After carrying out two-section foamable oven dry processing, can obtain poroelasticity nonwoven substrates of the present invention.
Embodiment 2
The preparation solid content is 30%, and viscosity is 600cps/25 ℃ polyethers flexibel polyurethane dispersion liquid, adds 4 parts of Stearyl Amines and is uniformly dispersed.With the above-mentioned polyurethane dispersing liquid of blowing agent that is dispersed with to 120g/m
2The terylene short fiber needled punched nonwoven material of grammes per square metre carries out soaking a roll process to be handled, and pick-up is 80%.Utilize drying cylinder to preheat 2min for 60 ℃, enter 135 ℃ of stentering forming drying plants heating 4min again, after carrying out the oven dry of two-section foamable and handling, can obtain poroelasticity nonwoven substrates of the present invention.
Embodiment 3
The preparation solid content is 50%, and viscosity is 800cps/25 ℃ polyethers flexibel polyurethane dispersion liquid, adds 7 parts of neopelexes and is uniformly dispersed.With the above-mentioned polyurethane dispersing liquid of blowing agent that is dispersed with to 120g/m
2The terylene short fiber needled punched nonwoven material of grammes per square metre carries out two and soaks two and roll processing, and pick-up is respectively 60% and 70%.Utilize the infrared 3min of preheating, enter 140 ℃ of baking oven for heating 6min again, after carrying out two-section foamable oven dry and handling, can obtain poroelasticity nonwoven substrates of the present invention.
Embodiment 4
The preparation solid content is 60%, and viscosity is 1800cps/25 ℃ polyethers flexibel polyurethane dispersion liquid, adds 10 parts of odium stearate and is uniformly dispersed.With the above-mentioned polyurethane dispersing liquid of blowing agent that is dispersed with to 200g/m
2The hot rolling nonwoven material of grammes per square metre carries out soaking a roll process and pads processing, and pick-up is 120%.Utilize the infrared 3min of preheating, enter 140 ℃ of baking oven for heating 5min again, after carrying out two-section foamable oven dry and handling, can obtain poroelasticity nonwoven substrates of the present invention.
Embodiment 5
The preparation solid content is 12%, and viscosity is 400cps/25 ℃ polyethers flexibel polyurethane dispersion liquid, adds 5 parts of neopelexes and is uniformly dispersed.With the above-mentioned polyurethane dispersing liquid of blowing agent that evenly is dispersed with to 800g/m
2The terylene needled punched nonwoven material of grammes per square metre carries out soaking a roll process to be handled, and pick-up is 80%.Utilize drying cylinder to preheat 2min for 40 ℃, enter 80 ℃ in baking oven heating 2min again, enter 130 ℃ of stentering forming drying plants heating 3min at last, after carrying out three sections foamables oven dry and handling, can obtain poroelasticity nonwoven substrates of the present invention.
Claims (6)
1, a kind of stephanoporate springiness nonwoven material backing material, its feature are that its unit grammes per square metre is 80～800g/m
2, and the elastic polyurethane foam of the even set 6～50wt% in inside and outside.
2, stephanoporate springiness nonwoven material backing material according to claim 1, its feature are that its unit grammes per square metre is 200～500g/m
2
3, a kind of preparation method of stephanoporate springiness nonwoven material backing material, it adopts following steps: at first preparation contains the homogeneous state aqueous polyurethane dispersing liquid of blowing agent, its solid content is 5～60%, viscosity is 200～2000cps/25 ℃, and the addition of described blowing agent is to add 1-15 part blowing agent in per 100 parts of polyurethane dispersing liquids; Secondly described dispersion liquid is applied on the nonwoven material by soaking a mode of rolling, pick-up is 40～200%; Carry out two-section or three segmentation foamables at last promptly, described two-section foamable technology is: first section foamable temperature is 40～60 ℃, and the time is 2～3min; Second section foamable temperature is 110～140 ℃, and the time is 3～5min; Described three segmentation foamable technologies are: first section heating-up temperature is 30～40 ℃, and the time is 2～3min; Second section heating-up temperature is 80～90 ℃, time 1～2min; The 3rd section heating-up temperature is 130～140 ℃, and the time is 3～5min.
4, the preparation method of stephanoporate springiness nonwoven material backing material according to claim 3, the solid content that it is characterized in that described aqueous polyurethane dispersing liquid is 15～30%, viscosity is 400～800cps/25 ℃; The addition of described blowing agent is middle interpolation 1-5 part blowing agent of per 100 parts of polyurethane dispersing liquids; Described pick-up is 60～120%.
5, according to the preparation method of claim 3 or 4 described stephanoporate springiness nonwoven material backing materials, it is characterized in that described nonwoven material base material is the needled punched nonwoven material base material, grammes per square metre is 80～800g/m
2
6, according to the preparation method of the described stephanoporate springiness nonwoven material backing material of claim 5, it is characterized in that described nonwoven material base material is the needled punched nonwoven material base material, grammes per square metre is 200～500g/m
2
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| CNA200810070745XA CN101250817A (en) | 2008-03-14 | 2008-03-14 | Stephanoporate springiness nonwoven material backing material and manufacturing method thereof |
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Open date: 20080827 |