CN103554859A - Slice material special for biodegradable non-woven fabric and preparation method thereof - Google Patents
Slice material special for biodegradable non-woven fabric and preparation method thereof Download PDFInfo
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Abstract
The invention provides a slice material special for a biodegradable non-woven fabric and a preparation method thereof. The preparation method comprises the following steps: drying under the condition of 50-70 DEG C for 6-12 hours by taking polylactic acid and poly(2-ethyl-2-oxazoline) as raw materials; then carrying out melt blending in mixing equipment to obtain the slice material special for the biodegradable non-woven fabric, wherein the poly(2-ethyl-2-oxazoline) is 0.5-10 parts by weight in terms of 100 parts by weight of the polylactic acid, the glass-transition temperature Tg of the poly(2-ethyl-2-oxazoline) is 58.6 DEG C, the thermal decomposition temperature of the poly(2-ethyl-2-oxazoline) is 365-380 DEG C, the number-average molecular weight of the poly(2-ethyl-2-oxazoline) is 50000 or 200000, the blending temperature is 180 DEG C, the blending time is 3-8 minutes, and the rotation speed of the mixing equipment is 30-100 rad/minute during blending.
Description
Technical field
The present invention relates to non-woven fabrics and manufacture field, particularly relate to special-purpose section material of a kind of biodegradable non-woven fabrics and preparation method thereof.
Background technology
Non-woven fabrics claims again non-woven weaving cotton cloth, and is to consist of orientation or random fiber, has protection against the tide, ventilative, pliable and tough, light weight, nontoxic, nonirritant, rich color, lower-price characteristic.The production technology of non-woven fabrics mainly contains spun-bond process, meltblown, pulp air-lay process method, pin (water) acupuncture manipulation, chemical adhesion method and heat viscosity method etc.Wherein, spun-bond process is a kind of nonwoven techniques that obtains fairly large application.Spun-bond process is called again filature fleece formation method, is one of main method of nonwoven production, and its principle is to utilize the method for synthetic fiber spinning, and superpolymer spinning, drawing-off, laying are become to net, finally by acupuncture, hot rolling or self method such as bonding, reinforces and forms nonwoven material.
The Nonwovens of spunbond technological process of production: section → screw extrusion press → melt-spinning → air cooling → drawing-off (vacuum drawing-off or malleation stretch) → lapping → hot rolling is binded → batched → finished product
The feature of spun-bond process is that flow process is brief, and production efficiency is high.Can directly raw material section be dropped in screw extrusion press, a step is spun into non-woven fabrics, is a kind of up-and-coming non-woven fabric production method.
Any fusible polymkeric substance can be made non-woven fabrics in theory, but the flowing property of its spinning property and melt (melting index) is closely related.It is about 20 to 60g/10min that the melting index of spunbond one-tenth silk requires, spunbond process requires polymer melt to have moderate melting index, can be in high speed spinning process Uniform Flow, and because melt strength is too low, do not cause fracture of wire frequency to increase, can form continuous filament yarn lapping and become even spun-bonded non-woven fabrics.
Poly(lactic acid) is a kind of novel Biodegradable material, can be degraded under field conditions (factors) water and carbonic acid gas.Poly(lactic acid) is because of its excellent mechanical and physical performance and can be considered to have potential use widely by machine-shaping property, but poly(lactic acid) matter is hard and poor toughness lacks flexibility and elasticity, these drawbacks limit its application.Poly(lactic acid) non-woven fabrics is bio-based type material, soft, adsorptivity is strong, moisturizing is ventilative, antibacterial, be a kind of pure, safety, health, get close to the quality matetrial of skin, there is the incomparable many biological natures of other base material.
At present, the melting index of domestic commercially available most of polylactic acid slice is all on the low side, mobility is poor, be not suitable for spun-bond process and produce non-woven fabrics, there are some researches show, under pure poly(lactic acid) high-temperature sample, carry out the easy thermolysis of spunbond experiment, cause Mechanical Properties of Products deteriorated, and carry out at a lower temperature when spunbond, its melt flow is unstable and melt fracture easily occurs, and finished product fragility is also very large.
Summary of the invention
Technical problem to be solved by this invention is to provide special-purpose section material of a kind of biodegradable non-woven fabrics and preparation method thereof, and the melting index that increases section material when improving fluidity of molten, adds the elongation at break of large slice material, improves its toughness.
In order to address the above problem, the invention discloses the preparation method of the special-purpose section material of a kind of biodegradable non-woven fabrics, comprising:
Take poly(lactic acid) and PEOz as raw material, under 50 ℃ to 70 ℃ conditions, after dry 6～12h, in mixing facilities, carry out melt blending, obtain the special-purpose section material of described biodegradable non-woven fabrics;
Wherein, with poly(lactic acid) 100 weight parts, be as the criterion, PEOz is 0.5～10 weight part, the glass transition temperature Tg of described PEOz is 58.6 ℃, the heat decomposition temperature of described PEOz is 365～380 ℃, the number-average molecular weight of described PEOz is 50000 or 200000, temperature during blend is 180 ℃, the time of blend is 3～8min, during blend described in the rotating speed of mixing facilities be 30～100rad/min.
Preferably, with poly(lactic acid) 100 weight parts, be as the criterion, PEOz is 10 weight parts.
Preferably, described poly(lactic acid) is 15.0g/10min～18.0g/10min in condition melting index under the condition of 190 ℃ of probe temperatures and nominal load 2160g.
Preferably, the glass transition temperature Tg of described poly(lactic acid) is 60.5 ℃.
Preferably, the tensile strength of described poly(lactic acid) is 56.3MPa.
Preferably, the elongation at break of described poly(lactic acid) is 5.6%.
Preferably, described mixing facilities is Banbury mixer.
The present invention also provides a kind of biodegradable non-woven fabrics of preparing by method described in any one in the claims special-purpose section material, take poly(lactic acid) and PEOz as raw material, the special-purpose section material of described biodegradable non-woven fabrics is that under 190 ℃ and the nominal load condition that is 2160g, melting index is 18.9～30.2g/10min at probe temperature, the tensile strength of the special-purpose section material of described biodegradable non-woven fabrics is 48.3～62.7MPa, and the elongation at break of the special-purpose section material of described biodegradable non-woven fabrics is 4.8～208.7%.
Compared with prior art, the present invention includes following advantage:
The invention provides special-purpose section material of a kind of biodegradable non-woven fabrics and preparation method thereof, it is raw material that described section material be take the poly(lactic acid) of 100 weight parts and the PEOz of 0.5～10 weight part, by two kinds of raw materials being dried under 50 ℃ to 70 ℃ conditions after 6～12h, in mixing facilities, melt blending obtains section material.The present invention is by adding PEOz, the section material obtaining is that under 190 ℃ and the nominal load condition that is 2160g, melting index is 30.2g/10min at probe temperature, increased the melting index of polylactic acid raw material, make the fluidity of molten of polylactic acid slice reach the requirement of spun-bonded non-woven fabrics to the spunbond one-tenth silk of raw material, simultaneously, the tensile strength of section material can reach 62.7MPa, mechanical strength keeps better, the elongation at break of section material can reach 208.7%, strengthened the elongation at break of original section material, section material toughness is significantly improved.
Embodiment
For above-mentioned purpose of the present invention, feature and advantage can be become apparent more, below in conjunction with embodiment, the present invention is further detailed explanation.
Experimental technique described in following embodiment, if no special instructions, is ordinary method; Described reagent and material, if no special instructions, all can obtain from commercial channels.
The preparation method who the invention provides the special-purpose section material of a kind of biodegradable non-woven fabrics, comprising:
Take poly(lactic acid) and PEOz as raw material, under 50 ℃ to 70 ℃ conditions, after dry 6～12h, in mixing facilities, carry out melt blending, obtain the special-purpose section material of described biodegradable non-woven fabrics.
PEOz claims again to gather (N-propionyl ethyleneimine); English name is (poly (2-ethyl-2-oxazoline); write a Chinese character in simplified form PEOX; belong to ethyleneimine base polymer; being to be made by the ring-opening polymerization of 2-ethyl-2-oxazoline (writing a Chinese character in simplified form EOX) positively charged ion, is the good polymkeric substance of a kind of unformed thermostability.Up to now, about improve the correlative study of poly(lactic acid) mobility and toughness with PEOz, at home and abroad there is no report.
In the embodiment of the present invention, with poly(lactic acid) 100 weight parts, be as the criterion, PEOz is 0.5～10 weight part, the glass transition temperature Tg of the PEOz adopting is 58.6 ℃, heat decomposition temperature is 365～380 ℃, number-average molecular weight is 50000 or 200000, and temperature during blend is 180 ℃.
In the embodiment of the present invention, when poly(lactic acid) and PEOz are carried out to blend, the time of blend is 3～8min, and during blend, the rotating speed of mixing facilities is 30～100rad/min.Preferably, mixing facilities can be Banbury mixer.
Further preferably, the poly(lactic acid) adopting in the embodiment of the present invention can be 15.0g/10min～18.0g/10min in condition melting index under the condition of 190 ℃ of probe temperatures and nominal load 2160g, glass transition temperature Tg can be 60.5 ℃, tensile strength can be 56.3MPa, and elongation at break can be 5.6%.
Through experiment test, the special-purpose section material of biodegradable non-woven fabrics that the embodiment of the present invention is prepared, at probe temperature, be under 190 ℃ and the nominal load condition that is 2160g, the melting index of test is 18.9～30.2g/10min, increased the melting index of polylactic acid raw material, make the fluidity of molten of polylactic acid slice material reach the requirement of spun-bonded non-woven fabrics to the spunbond one-tenth silk of raw material, simultaneously, tensile strength is 48.3～62.7MPa, elongation at break is 4.8～208.7%, on maintenance section is expected compared with the basis of high tensile, mechanical strength keeps better, strengthened the elongation at break of original section material, section material toughness is greatly improved.
For making those skilled in the art understand better the present invention, below by a plurality of specific embodiments, the special-purpose section of biodegradable non-woven fabrics of the present invention preparation method for material is described.
Embodiment 1,
By following mass parts, take a component:
Poly(lactic acid) 100 weight parts; PEOz 50000 molecular weight 0.5 weight parts.
Preparation technology is as follows:
By above-mentioned each component in vacuum drying oven 50 ℃ dry 12 hours.Dried each component is melt blending in Banbury mixer in proportion, and blending temperature is 180 ℃, and the blend time is 3min, and rotating speed is 60rad/min, obtains blend.
The melting index of blend is used XNR-400B melt flow rate (MFR) determinator (discharge port diameter is Φ 2.095 ± 0.005mm, and discharge port length is 8.000 ± 0.025mm) to measure, and temperature is 190 ℃, and pressure is 2160g.
Blend is pressed into plate on compression molding instrument, be cut into after dumbbell shape batten, with pulling experiment machine, test mechanical property: batten length is 75mm, width is 4 ± 0.1mm, and thickness is 1 ± 0.1mm, and trial speed is 25mm/min, experiment repeats 6 times, average, obtain the tensile strength of described poly-lactic acid material, elongation at break.The mechanical performance data of measuring sees the following form 1.
Embodiment 2
By following mass parts, take a component:
Poly(lactic acid) 100 weight parts; PEOz 50000 molecular weight 1 weight parts.
Preparation technology is as follows:
By above-mentioned each component in vacuum drying oven 50 ℃ dry 12 hours.Dried each component is melt blending in Banbury mixer in proportion, and blending temperature is 180 ℃, and the blend time is 3min, and rotating speed is 60rad/min, obtains blend.
The melting index of blend is used XNR-400B melt flow rate (MFR) determinator to measure, and temperature is 190 ℃, and pressure is 2160g.
Blend is pressed into plate on compression molding instrument, be cut into after dumbbell shape batten, with pulling experiment machine, test mechanical property: batten length is 75mm, width is 4 ± 0.1mm, and thickness is 1 ± 0.1mm, and trial speed is 25mm/min, experiment repeats 6 times, average, obtain the tensile strength of described poly-lactic acid material, elongation at break.The mechanical performance data of measuring sees the following form 1.
Embodiment 3
By following mass parts, take a component:
Poly(lactic acid) 100 weight parts; PEOz 50000 molecular weight 3 weight parts.
Preparation technology is as follows:
By above-mentioned each component in vacuum drying oven 50 ℃ dry 12 hours.Dried each component is melt blending in Banbury mixer in proportion, and blending temperature is 180 ℃, and the blend time is 3min, and rotating speed is 60rad/min, obtains blend.
The melting index of blend is used XNR-400B melt flow rate (MFR) determinator to measure, and temperature is 190 ℃, and pressure is 2160g.
Blend is pressed into plate on compression molding instrument, be cut into after dumbbell shape batten, with pulling experiment machine, test mechanical property: batten length is 75mm, width is 4 ± 0.1mm, and thickness is 1 ± 0.1mm, and trial speed is 25mm/min, experiment repeats 6 times, average, obtain the tensile strength of described poly-lactic acid material, elongation at break.The mechanical performance data of measuring sees the following form 1.
Embodiment 4
By following mass parts, take a component:
Poly(lactic acid) 100 weight parts; PEOz 50000 molecular weight 5 weight parts.
Preparation technology is as follows:
By above-mentioned each component in vacuum drying oven 50 ℃ dry 12 hours.Dried each component is melt blending in Banbury mixer in proportion, and blending temperature is 180 ℃, and the blend time is 3min, and rotating speed is 60rad/min, obtains blend.
The melting index of blend is used XNR-400B melt flow rate (MFR) determinator to measure, and temperature is 190 ℃, and pressure is 2160g.
Blend is pressed into plate on compression molding instrument, be cut into after dumbbell shape batten, with pulling experiment machine, test mechanical property: batten length is 75mm, width is 4 ± 0.1mm, and thickness is 1 ± 0.1mm, and trial speed is 25mm/min, experiment repeats 6 times, average, obtain the tensile strength of described poly-lactic acid material, elongation at break.The mechanical performance data of measuring sees the following form 1.
Embodiment 5
By following mass parts, take a component:
Poly(lactic acid) 100 weight parts; PEOz 50000 molecular weight 7 weight parts.
Preparation technology is as follows:
By above-mentioned each component in vacuum drying oven 50 ℃ dry 12 hours.Dried each component is melt blending in Banbury mixer in proportion, and blending temperature is 180 ℃, and the blend time is 3min, and rotating speed is 60rad/min, obtains blend.
The melting index of blend is used XNR-400B melt flow rate (MFR) determinator to measure, and temperature is 190 ℃, and pressure is 2160g.
Blend is pressed into plate on compression molding instrument, be cut into after dumbbell shape batten, with pulling experiment machine, test mechanical property: batten length is 75mm, width is 4 ± 0.1mm, and thickness is 1 ± 0.1mm, and trial speed is 25mm/min, experiment repeats 6 times, average, obtain the tensile strength of described poly-lactic acid material, elongation at break.The mechanical performance data of measuring sees the following form 1.
Embodiment 6
By following mass parts, take a component:
Poly(lactic acid) 100 weight parts; PEOz 50000 molecular weight 10 weight parts.
Preparation technology is as follows:
By above-mentioned each component in vacuum drying oven 50 ℃ dry 12 hours.Dried each component is melt blending in Banbury mixer in proportion, and blending temperature is 180 ℃, and the blend time is 3min, and rotating speed is 60rad/min, obtains blend.
The melting index of blend is used XNR-400B melt flow rate (MFR) determinator to measure, and temperature is 190 ℃, and pressure is 2160g.
Blend is pressed into plate on compression molding instrument, be cut into after dumbbell shape batten, with pulling experiment machine, test mechanical property: batten length is 75mm, width is 4 ± 0.1mm, and thickness is 1 ± 0.1mm, and trial speed is 25mm/min, experiment repeats 6 times, average, obtain the tensile strength of described poly-lactic acid material, elongation at break.The mechanical performance data of measuring sees the following form 1.
Embodiment 7
By following mass parts, take a component:
Poly(lactic acid) 100 weight parts; PEOz 200000 molecular weight 0.5 weight parts.
Preparation technology is as follows:
By above-mentioned each component in vacuum drying oven 50 ℃ dry 12 hours.Dried each component is melt blending in Banbury mixer in proportion, and blending temperature is 180 ℃, and the blend time is 3min, and rotating speed is 60rad/min, obtains blend.
The melting index of blend is used XNR-400B melt flow rate (MFR) determinator to measure, and temperature is 190 ℃, and pressure is 2160g.
Blend is pressed into plate on compression molding instrument, be cut into after dumbbell shape batten, with pulling experiment machine, test mechanical property: batten length is 75mm, width is 4 ± 0.1mm, and thickness is 1 ± 0.1mm, and trial speed is 25mm/min, experiment repeats 6 times, average, obtain the tensile strength of described poly-lactic acid material, elongation at break.The mechanical performance data of measuring sees the following form 1.
Embodiment 8
By following mass parts, take a component:
Poly(lactic acid) 100 weight parts; PEOz 200000 molecular weight 1 weight parts.
Preparation technology is as follows:
By above-mentioned each component in vacuum drying oven 50 ℃ dry 12 hours.Dried each component is melt blending in Banbury mixer in proportion, and blending temperature is 180 ℃, and the blend time is 3min, and rotating speed is 60rad/min, obtains blend.
The melting index of blend is used XNR-400B melt flow rate (MFR) determinator to measure, and temperature is 190 ℃, and pressure is 2160g.
Blend is pressed into plate on compression molding instrument, be cut into after dumbbell shape batten, with pulling experiment machine, test mechanical property: batten length is 75mm, width is 4 ± 0.1mm, and thickness is 1 ± 0.1mm, and trial speed is 25mm/min, experiment repeats 6 times, average, obtain the tensile strength of described poly-lactic acid material, elongation at break.The mechanical performance data of measuring is in Table 1.
Embodiment 9
By following mass parts, take a component:
Poly(lactic acid) 100 weight parts; PEOz 200000 molecular weight 3 weight parts.
Preparation technology is as follows:
By above-mentioned each component in vacuum drying oven 50 ℃ dry 12 hours.Dried each component is melt blending in Banbury mixer in proportion, and blending temperature is 180 ℃, and the blend time is 3min, and rotating speed is 60rad/min, obtains blend.
The melting index of blend is used XNR-400B melt flow rate (MFR) determinator to measure, and temperature is 190 ℃, and pressure is 2160g.
Blend is pressed into plate on compression molding instrument, be cut into after dumbbell shape batten, with pulling experiment machine, test mechanical property: batten length is 75mm, width is 4 ± 0.1mm, and thickness is 1 ± 0.1mm, and trial speed is 25mm/min, experiment repeats 6 times, average, obtain the tensile strength of described poly-lactic acid material, elongation at break.The mechanical performance data of measuring sees the following form 1.
Embodiment 10
By following mass parts, take a component:
Poly(lactic acid) 100 weight parts; Poly-(2-ethyl-2-oxazoline 200000 molecular weight 5 weight parts.
Preparation technology is as follows:
By above-mentioned each component in vacuum drying oven 50 ℃ dry 12 hours.Dried each component is melt blending in Banbury mixer in proportion, and blending temperature is 180 ℃, and the blend time is 3min, and rotating speed is 60rad/min, obtains blend.
The melting index of blend is used XNR-400B melt flow rate (MFR) determinator to measure, and temperature is 190 ℃, and pressure is 2160g.
Blend is pressed into plate on compression molding instrument, be cut into after dumbbell shape batten, with pulling experiment machine, test mechanical property: batten length is 75mm, width is 4 ± 0.1mm, and thickness is 1 ± 0.1mm, and trial speed is 25mm/min, experiment repeats 6 times, average, obtain the tensile strength of described poly-lactic acid material, elongation at break.The mechanical performance data of measuring sees the following form 1.
Embodiment 11
By following mass parts, take a component:
Poly(lactic acid) 100 weight parts; Poly-(2-ethyl-2-oxazoline 200000 molecular weight 7 weight parts.
Preparation technology is as follows:
By above-mentioned each component in vacuum drying oven 50 ℃ dry 12 hours.Dried each component is melt blending in Banbury mixer in proportion, and blending temperature is 180 ℃, and the blend time is 3min, and rotating speed is 60rad/min, obtains blend.
The melting index of blend is used XNR-400B melt flow rate (MFR) determinator to measure, and temperature is 190 ℃, and pressure is 2160g.
Blend is pressed into plate on compression molding instrument, be cut into after dumbbell shape batten, with pulling experiment machine, test mechanical property: batten length is 75mm, width is 4 ± 0.1mm, and thickness is 1 ± 0.1mm, and trial speed is 25mm/min, experiment repeats 6 times, average, obtain the tensile strength of described poly-lactic acid material, elongation at break.The mechanical performance data of measuring sees the following form 1.
Embodiment 12
By following mass parts, take a component:
Poly(lactic acid) 100 weight parts; PEOz 200000 molecular weight 10 weight parts.
Preparation technology is as follows:
By above-mentioned each component in vacuum drying oven 50 ℃ dry 12 hours.Dried each component is melt blending in Banbury mixer in proportion, and blending temperature is 180 ℃, and the blend time is 3min, and rotating speed is 60rad/min, obtains blend.
The melting index of blend is used XNR-400B melt flow rate (MFR) determinator to measure, and temperature is 190 ℃, and pressure is 2160g.
Blend is pressed into plate on compression molding instrument, be cut into after dumbbell shape batten, with pulling experiment machine, test mechanical property: batten length is 75mm, width is 4 ± 0.1mm, and thickness is 1 ± 0.1mm, and trial speed is 25mm/min, experiment repeats 6 times, average, obtain the tensile strength of described poly-lactic acid material, elongation at break.The mechanical performance data of measuring sees the following form 1.
The correlated performance of table 1 poly(lactic acid) and embodiment 1-12
As shown in Table 1, along with adding of PEOz, the melting index of polylactic acid slice material increases gradually, 15.4g/10min by pure poly(lactic acid), maximum is increased to 30.2g/10min(poly-(2-ethyl-2-oxazoline is 10 weight parts), thereby has better met the requirement of spun-bond process spinning to section higher melt flow performance.The tensile strength of section material first slightly increases after the adding of PEOz, and then occurs slightly declining.When the PEOz of 200000 molecular weight adds 5 weight part, tensile strength reaches and is 62.7MPa to the maximum, than pure poly(lactic acid), has improved 11.5% left and right.
As shown in Table 1, the elongation at break of polylactic acid slice material changes not quite when PEOz content is lower, when PEOz high-content (5-10%), be greatly improved, the highlyest brought up to 208.7%, illustrated that the PEOz at high-content has comparatively significant toughening effect to poly(lactic acid).
In addition, contrast by data in table 1 is known, the PEOz of the PEOz of 200000 molecular weight and 50000 molecular weight on the melting index of polylactic acid slice and relevant mechanical property to affect difference very small.
In sum, when poly(lactic acid) is 100 weight part, in the content range of reporting in the embodiment of the present invention, by regulating the content of PEOz, can make preferably the melt index values of polylactic acid slice reach the numerical range that is applicable to spunbond one-tenth silk, and when keeping higher force to learn intensity, significantly improve toughness and the elongation at break of section, can be used as the special-purpose section of biodegradable polylactic acid spun-bonded non-woven fabrics and use.
These are only the preferred embodiment that the present invention is cited; not in order to limit the scope of the invention; under those of ordinary skill in technical field use equivalence that the present invention does to modify or change goods such as () spun-bonded non-woven fabrics making with the present invention, all with belonging to scope of patent protection of the present invention.
For embodiment of the method, for simple description, therefore it is all expressed as to a series of combination of actions, but those skilled in the art should know, the present invention is not subject to the restriction of described sequence of operation, because according to the present invention, some step can adopt other orders or carry out simultaneously.Secondly, those skilled in the art also should know, the embodiment described in specification sheets all belongs to preferred embodiment, and related action and parts might not be that the present invention is necessary.
Above special-purpose section material of a kind of biodegradable non-woven fabrics provided by the present invention and preparation method thereof is described in detail, applied specific case herein principle of the present invention and embodiment are set forth, the explanation of above embodiment is just for helping to understand method of the present invention and core concept thereof; , for one of ordinary skill in the art, according to thought of the present invention, all will change in specific embodiments and applications, in sum, this description should not be construed as limitation of the present invention meanwhile.
Claims (8)
1. a preparation method for the special-purpose section material of biodegradable non-woven fabrics, is characterized in that, comprising:
Take poly(lactic acid) and PEOz as raw material, under 50 ℃ to 70 ℃ conditions, after dry 6～12h, in mixing facilities, carry out melt blending, obtain the special-purpose section material of described biodegradable non-woven fabrics;
Wherein, with poly(lactic acid) 100 weight parts, be as the criterion, PEOz is 0.5～10 weight part, the glass transition temperature Tg of described PEOz is 58.6 ℃, the heat decomposition temperature of described PEOz is 365～380 ℃, the number-average molecular weight of described PEOz is 50000 or 200000, temperature during blend is 180 ℃, the time of blend is 3～8min, during blend described in the rotating speed of mixing facilities be 30～100rad/min.
2. method according to claim 1, is characterized in that, with poly(lactic acid) 100 weight parts, is as the criterion, and PEOz is 10 weight parts.
3. method according to claim 1, is characterized in that, described poly(lactic acid) is 15.0g/10min～18.0g/10min in condition melting index under the condition of 190 ℃ of probe temperatures and nominal load 2160g.
4. method according to claim 1, is characterized in that, the glass transition temperature Tg of described poly(lactic acid) is 60.5 ℃.
5. method according to claim 1, is characterized in that, the tensile strength of described poly(lactic acid) is 56.3MPa.
6. method according to claim 1, is characterized in that, the elongation at break of described poly(lactic acid) is 5.6%.
7. method according to claim 1, is characterized in that, described mixing facilities is Banbury mixer.
8. the special-purpose section of the biodegradable non-woven fabrics of preparing by method described in any one in claim 1-7 is expected, it is characterized in that, take poly(lactic acid) and PEOz as raw material, the special-purpose section material of described biodegradable non-woven fabrics is that under 190 ℃ and the nominal load condition that is 2160g, melting index is 18.9～30.2g/10min at probe temperature, the tensile strength of the special-purpose section material of described biodegradable non-woven fabrics is 48.3～62.7MPa, and the elongation at break of the special-purpose section material of described biodegradable non-woven fabrics is 4.8～208.7%.
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| CN102016150A (en) * | 2008-05-05 | 2011-04-13 | 艾维够产业1953有限公司 | Nonwoven material |
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