CN105088542A - High-elongation modified polylactic acid SMS composite nonwoven material and preparation method thereof - Google Patents
High-elongation modified polylactic acid SMS composite nonwoven material and preparation method thereof Download PDFInfo
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Abstract
The invention relates to a high-elongation modified polylactic acid (PLA) SMS composite nonwoven material and a preparation method thereof. The material consists of a structure with three layers, wherein the upper layer and the lower layer are made of modified PLA spunbonded nonwoven materials; the intermediate layer is made of a modified PLA melt-blown nonwoven material; for the nonwoven material, the surface density is 20 to 100g/m<2>, the longitudinal strength is 40 to 150N/5cm, the longitudinal elongation at break is 60 to 130 percent, the cross strength is 30 to 140N/5cm, and the cross elongation at break is 50 to 120 percent. The preparation method comprises the steps of preparation of raw materials, spunbonded spinning, melt-blown spinning, SMS compounding and reinforcing and the like; according to the nonwoven material disclosed by the invention, the PLA is modified by a polyamide elastomer, so that the defect that the PLA is great in brittleness is overcome; for the nonwoven material, the surface density is 20 to 100g/m<2>, the longitudinal strength is 40 to 150N/5cm, the longitudinal elongation at break is 60 to 130 percent, the cross strength is 30 to 140N/5cm, and the cross elongation at break is 50 to 120 percent; the nonwoven material has excellent mechanical property and biodegradability, can meet the requirements of medical and health materials and packaging materials, and can be widely used for products such as baby diapers, sanitary towels, surgical gowns and covering cloth.
Description
Technical field
The invention belongs to nonwoven material field, relate to a kind of high elongation rate PLA SMS composite nonwoven material and preparation method thereof.
Background technology
20th century synthesized polymer material appearance and fast development significantly improve the life of the mankind, synthesized polymer material has been listed as four large pillars of Material Field with iron and steel, timber and cement.But the huge production and consumption of synthesized polymer material also creates two key subjects: limited petroleum resources are consumed and environmental pollution that waste polymer causes by a large amount of.These problems have caused the great attention in the whole world.21 century, many countries will build the resource recycling society of sustainable development as one of state basic policy, and the eco-friendly biodegradated polymer materal of Devoting Major Efforts To Developing is worldwide surging forward.
In numerous biodegradated polymer materal developed, PLA (PLA) is described as one of the most potential kind.Main because PLA has fully biodegradable and take renewable resource as the plant origin of raw material, and be a kind of material maintaining nature " carbon cycle balance ".So the Application and Development of PLA can reduce the white pollution of polymeric scrap material to environment, save petroleum resources, suppress the aggravation of the global greenhouse effect caused because the clean discharge capacity of carbon dioxide increases.
The distinctive biodegradability of PLA makes it very extensive in the application prospect in medical and health and packaging material field.And advantage, one of the important composition material becoming medical and health and packaging material such as SMS composite nonwoven material has stable preparation process, intensity is high, adaptability good and cost is low.
At present, the correlative study work of PLA SMS composite nonwoven material is also less, mainly concentrates on the experimental research stage, also has with a certain distance from large-scale production, and this is mainly more crisp due to PLA material performance, and elongation at break is low, is generally less than 5%.Therefore, even if make SMS composite nonwoven material, its elongation at break is also less than 15%, is difficult to meet the requirement to toughness and percentage elongation of some medical and healths and packaging material.Chinese patent ZL201010163359.2 discloses a kind of fully-degradable polylactic acid fiber SMS compound non-woven and manufacture method thereof, and the Materials Fracture percentage elongation manufactured by the method is maximum only reaches 12%, cannot realize high elongation rate, high tenacity.
Summary of the invention
The object of the invention is the defect overcoming prior art, the polydactyl acid SMS composite nonwoven material of a kind of high elongation rate, high tenacity is provided.
The technical scheme realizing the object of the invention is: a kind of high elongation rate polydactyl acid SMS composite nonwoven material, this material is made up of three-decker, its the upper and lower are polydactyl acid viscose non-woven material, and intermediate layer is polydactyl acid melt-blown non-woven material; This nonwoven material surface density is 20-100g/m
2, longitudinally brute force is 40-150N/5cm, and longitudinal fracture percentage elongation is 60-130%, and laterally brute force is 30-140N/5cm, and transverse breakage percentage elongation is 50-120%.
Technique scheme, described PLA SMS composite nonwoven material is composited by polydactyl acid viscose non-woven material and polydactyl acid viscose non-woven material; Described polydactyl acid viscose non-woven material fibre fineness is at 0.1-1mm, and surface density is at 8-40g/m
2; Described polydactyl acid melt-blown non-woven material fibre fineness at 2-10 μm, surface density 4-20g/m
2.
A manufacture method for high elongation rate polydactyl acid SMS composite nonwoven material, comprises the steps:
A. by spunbond and melt-blown special polylactic acid slice at 100 DEG C dry 12 hours respectively, the PLA master batch of polyamide elastomer and oven dry is added screw extruder melt extrude at 160-180 DEG C of temperature, cooling granulation, obtain spunbond and melt-blown dedicated modified polylactic acid slice, wherein polyamide elastomer is 5-30 part, and PLA is 70-95 part;
B. spun-bond process spinning: carry out melt spinning by the spunbond dedicated modified polylactic acid slice feeding screw extruder obtained in steps A, spinning temperature 150-200 DEG C, melt through screw rod to filament spinning component, spray from spinnerets, through high velocity air cooling drawing-off, final by sub-wire lapping, obtain viscose non-woven material, spinning speed 200-1500m/min;
C. meltblown spinning: carry out melt-spraying spinning by the melt-blown dedicated modified polylactic acid slice feeding screw extruder obtained in steps A, spinning temperature is 150-220 DEG C, melt through screw rod to filament spinning component, spray from spinnerets, through velocity heated gas drawing-off, make melt-blown micro fibre, and form melt-blown non-woven material on the reception device, spinning speed 200-1500m/min;
D.SMS compound and reinforcing: on the viscose non-woven material that step B obtains, carry out step C spin meltblown layer, and then carry out the spinning process of step B, preparation SMS composite nonwoven material, finally carries out hot rolling reinforcing to obtained composite nonwoven material.
Technique scheme, the melt index of described spunbond special polylactic acid slice at 210 DEG C is 20-35g/10min, and fusing point is 160-180 DEG C.
Technique scheme, the melt index of described melt-blown special polylactic acid slice at 210 DEG C is 70-85g/10min, and fusing point is 160-170 DEG C.
Technique scheme, described polyamide elastomer is the copolymer that polyamide and PolyTHF form.
Technique scheme, the weight average molecular weight that described copolymer contains polyamide portion is 530, and content is 22%; The weight average molecular weight that copolymer contains PolyTHF part is 2000, and content is 78%.
After adopting technique scheme, the present invention has following positive effect: nonwoven material of the present invention to PLA modification, overcomes the shortcoming that PLA fragility is large by polyamide elastomer; This nonwoven material surface density 20-100g/m2, longitudinally powerful 40-150N/5cm, longitudinal fracture percentage elongation 60-130%, laterally powerful 30-140N/5cm, transverse breakage percentage elongation 50-120%; This nonwoven material has excellent mechanical property and biodegradability, can adapt to the requirement of medical and health and packaging material, can be widely used in the products such as diaper, sanitary napkin, operation dress, drape.
Accompanying drawing explanation
In order to make content of the present invention more easily be clearly understood, below according to specific embodiment also by reference to the accompanying drawings, the present invention is further detailed explanation, wherein
Fig. 1 is high elongation rate PLA SMS composite nonwoven material preparation technology flow process.
Detailed description of the invention
In order to deepen the understanding of the present invention, below in conjunction with embodiment, the invention will be further described, and this embodiment only for explaining the present invention, does not form limiting the scope of the present invention.
The present invention illustrates a kind of high elongation rate polydactyl acid SMS composite nonwoven material and preparation method thereof, and concrete preparation technology's flow process as shown in Figure 1, makes detailed description below in conjunction with embodiment to the present invention.
Embodiment one:
Be 35g/10min (210 DEG C) by melt index, the spunbond polylactic acid slice of fusing point 160 DEG C and melt index are 85g/10min (210 DEG C), the melt-blown special polylactic acid slice of fusing point 160 DEG C was at 100 DEG C dry 12 hours respectively, the PLA master batch of polyamide elastomer and oven dry is added screw extruder melt extrude at 170 DEG C of temperature, cooling granulation, obtain spunbond and melt-blown dedicated modified polylactic acid slice, wherein polyamide elastomer is 10 parts, and PLA is 90 parts.Spunbond dedicated modified polylactic acid slice spinning temperature 180 DEG C, spinning speed 1000m/min; Melt-blown dedicated modified polylactic acid slice spinning temperature is 190 DEG C, spinning speed 1000m/min, and preparation SMS composite nonwoven material, finally carries out hot rolling reinforcing to obtained composite nonwoven material.Obtained SMS composite nonwoven material, nonwoven material surface density 40g/m2, longitudinally powerful 112N/5cm, longitudinal fracture percentage elongation 93%, laterally powerful 104N/5cm, transverse breakage percentage elongation 76%.
Embodiment two:
Be 30g/10min (210 DEG C) by melt index, the spunbond polylactic acid slice of fusing point 170 DEG C and melt index are 80g/10min (210 DEG C), the melt-blown special polylactic acid slice of fusing point 170 DEG C was at 100 DEG C dry 12 hours respectively, the PLA master batch of polyamide elastomer and oven dry is added screw extruder melt extrude at 180 DEG C of temperature, cooling granulation, obtain spunbond and melt-blown dedicated modified polylactic acid slice, wherein polyamide elastomer is 20 parts, and PLA is 80 parts.Spunbond dedicated modified polylactic acid slice spinning temperature 190 DEG C, spinning speed 1100m/min; Melt-blown dedicated modified polylactic acid slice spinning temperature is 200 DEG C, spinning speed 1100m/min, and preparation SMS composite nonwoven material, finally carries out hot rolling reinforcing to obtained composite nonwoven material.Obtained SMS composite nonwoven material, nonwoven material surface density 50g/m2, longitudinally powerful 126N/5cm, longitudinal fracture percentage elongation 86%, laterally powerful 113N/5cm, transverse breakage percentage elongation 77%.
Embodiment three:
Be 25g/10min (210 DEG C) by melt index, the spunbond polylactic acid slice of fusing point 180 DEG C and melt index are 75g/10min (210 DEG C), the melt-blown special polylactic acid slice of fusing point 180 DEG C was at 100 DEG C dry 12 hours respectively, the PLA master batch of polyamide elastomer and oven dry is added screw extruder melt extrude at 185 DEG C of temperature, cooling granulation, obtain spunbond and melt-blown dedicated modified polylactic acid slice, wherein polyamide elastomer is 25 parts, and PLA is 75 parts.Spunbond dedicated modified polylactic acid slice spinning temperature 195 DEG C, spinning speed 1200m/min; Melt-blown dedicated modified polylactic acid slice spinning temperature is 205 DEG C, spinning speed 1200m/min, and preparation SMS composite nonwoven material, finally carries out hot rolling reinforcing to obtained composite nonwoven material.Obtained SMS composite nonwoven material, nonwoven material surface density 55g/m2, longitudinally powerful 132N/5cm, longitudinal fracture percentage elongation 79%, laterally powerful 124N/5cm, transverse breakage percentage elongation 71%.
The melt index of the spunbond special polylactic acid slice of above embodiment at 210 DEG C is 20-35g/10min, and fusing point is 160-180 DEG C, and the melt index of melt-blown special polylactic acid slice at 210 DEG C is 70-85g/10min, and fusing point is 160-170 DEG C.Polyamide elastomer is the copolymer that polyamide and PolyTHF form, and the weight average molecular weight containing polyamide portion in copolymer is 530, and content is 22%; The weight average molecular weight that copolymer contains PolyTHF part is 2000, and content is 78%.
Above-described specific embodiment; object of the present invention, technical scheme and beneficial effect are further described; be understood that; the foregoing is only specific embodiments of the invention; be not limited to the present invention; within the spirit and principles in the present invention all, any amendment made, equivalent replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (7)
1. a high elongation rate polydactyl acid SMS composite nonwoven material, it is characterized in that: this material is made up of three-decker, its upper and lower are polydactyl acid viscose non-woven material, intermediate layer is polydactyl acid melt-blown non-woven material; This nonwoven material surface density is 20-100g/m
2, longitudinally brute force is 40-150N/5cm, and longitudinal fracture percentage elongation is 60-130%, and laterally brute force is 30-140N/5cm, and transverse breakage percentage elongation is 50-120%.
2. high elongation rate modification lactic acid SMS composite nonwoven material according to claim 1, is characterized in that: described PLA SMS composite nonwoven material is composited by polydactyl acid viscose non-woven material and polydactyl acid viscose non-woven material; Described polydactyl acid viscose non-woven material fibre fineness is at 0.1-1mm, and surface density is at 8-40g/m
2; Described polydactyl acid melt-blown non-woven material fibre fineness at 2-10 μm, surface density 4-20g/m
2.
3. a manufacture method for high elongation rate polydactyl acid SMS composite nonwoven material as claimed in claim 1 or 2, is characterized in that: comprise the steps:
A. by spunbond and melt-blown special polylactic acid slice at 100 DEG C dry 12 hours respectively, the PLA master batch of polyamide elastomer and oven dry is added screw extruder melt extrude at 160-180 DEG C of temperature, cooling granulation, obtain spunbond and melt-blown dedicated modified polylactic acid slice, wherein polyamide elastomer is 5-30 part, and PLA is 70-95 part;
B. spun-bond process spinning: carry out melt spinning by the spunbond dedicated modified polylactic acid slice feeding screw extruder obtained in steps A, spinning temperature 150-200 DEG C, melt through screw rod to filament spinning component, spray from spinnerets, through high velocity air cooling drawing-off, final by sub-wire lapping, obtain viscose non-woven material, spinning speed 200-1500m/min;
C. meltblown spinning: carry out melt-spraying spinning by the melt-blown dedicated modified polylactic acid slice feeding screw extruder obtained in steps A, spinning temperature is 150-220 DEG C, melt through screw rod to filament spinning component, spray from spinnerets, through velocity heated gas drawing-off, make melt-blown micro fibre, and form melt-blown non-woven material on the reception device, spinning speed 200-1500m/min;
D.SMS compound and reinforcing: on the viscose non-woven material that step B obtains, carry out step C spin meltblown layer, and then carry out the spinning process of step B, preparation SMS composite nonwoven material, finally carries out hot rolling reinforcing to obtained composite nonwoven material.
4. the manufacture method of high elongation rate polydactyl acid SMS composite nonwoven material according to claim 3, is characterized in that: the melt index of described spunbond special polylactic acid slice at 210 DEG C is 20-35g/10min, and fusing point is 160-180 DEG C.
5. the manufacture method of high elongation rate polydactyl acid SMS composite nonwoven material according to claim 3, is characterized in that: the melt index of described melt-blown special polylactic acid slice at 210 DEG C is 70-85g/10min, and fusing point is 160-170 DEG C.
6. the manufacture method of high elongation rate polydactyl acid SMS composite nonwoven material according to claim 3, is characterized in that: described polyamide elastomer is the copolymer that polyamide and PolyTHF form.
7. the manufacture method of high elongation rate polydactyl acid SMS composite nonwoven material according to claim 6, it is characterized in that: the weight average molecular weight that described copolymer contains polyamide portion is 530, content is 22%; The weight average molecular weight that copolymer contains PolyTHF part is 2000, and content is 78%.
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Cited By (5)
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| CN105584171A (en) * | 2014-10-24 | 2016-05-18 | 张家港骏马无纺布有限公司 | High-strength polylactic acid SMS composite non-woven material and preparation method thereof |
| CN107761254A (en) * | 2017-10-27 | 2018-03-06 | 山东恒鹏卫生用品有限公司 | Elastic non-woven cloth and its preparation method and application |
| CN107988715A (en) * | 2018-01-05 | 2018-05-04 | 山东恒鹏卫生用品有限公司 | A kind of SMS types elastic non-woven cloth |
| CN108149388A (en) * | 2018-02-26 | 2018-06-12 | 深圳中纺滤材科技有限公司 | A kind of two-component acoustical cotton and preparation method thereof |
| CN108505212A (en) * | 2018-03-31 | 2018-09-07 | 郭跃 | A kind of preparation method of imitative goose down shape heat insulating material |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105584171A (en) * | 2014-10-24 | 2016-05-18 | 张家港骏马无纺布有限公司 | High-strength polylactic acid SMS composite non-woven material and preparation method thereof |
| CN107761254A (en) * | 2017-10-27 | 2018-03-06 | 山东恒鹏卫生用品有限公司 | Elastic non-woven cloth and its preparation method and application |
| CN107988715A (en) * | 2018-01-05 | 2018-05-04 | 山东恒鹏卫生用品有限公司 | A kind of SMS types elastic non-woven cloth |
| CN108149388A (en) * | 2018-02-26 | 2018-06-12 | 深圳中纺滤材科技有限公司 | A kind of two-component acoustical cotton and preparation method thereof |
| CN108505212A (en) * | 2018-03-31 | 2018-09-07 | 郭跃 | A kind of preparation method of imitative goose down shape heat insulating material |
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