CN103668541A - Degradable fibers containing PBAT (poly(butylene adipate-co-terephthalate)) and preparation method thereof - Google Patents
Degradable fibers containing PBAT (poly(butylene adipate-co-terephthalate)) and preparation method thereof Download PDFInfo
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Abstract
The invention relates to degradable fibers containing PBAT (poly(butylene adipate-co-terephthalate)) and a preparation method thereof. The degradable fibers containing PBAT is prepared from the following components in parts by weight: 30-90 parts of PBAT and 10-70 parts of high-molecular polymers. The preparation method comprises the following steps: performing vacuum drying on the PBAT and the high-molecular polymers until the moisture content is below 100ppm; mixing in a ratio and performing melt spinning; and cooling, winding and forming to obtain pre-draft yarns of the degradable fibers containing PBAT. Compared with the prior art, the fibers provided by the invention are relatively good in spinnability, relatively high in mechanical strength and sustainably stable in soft handfeel, and are widely applicable; meanwhile, the preparation method provided by the invention is simple and easy to operate, industrial production can be realized by use of general spinning equipment, and equipment transformation is not required, thereby saving the cost.
Description
Technical field
The present invention relates to biodegradable fiber in technical field of polymer materials and preparation method thereof, especially relate to a kind of biodegradable fiber containing PBAT and preparation method thereof.
Background technology
In degradation material, poly-adipic acid/butylene terephthalate (PBAT) is the terpolymer of terephthalic acid (TPA), adipic acid and butanediol, easily processing, there are stronger toughness and good biological degradability, under the condition of soil or compost, be decomposed into carbon dioxide, living beings and water, other performances are similar to low density polyethylene (LDPE).PBAT fibrous material has good biological degradability simultaneously, and feel is soft compared with fibrous materials such as PLA, has good elasticity, good heat resistance, and more high temperature resistant than common material, these advantages have determined that it has broad application prospects.But, because the building-up process of PBAT adopts random copolymerization, make it be not easy crystallization, restricted the development of PBAT fiber technology of preparing and PBAT as the application of fibrous material.Therefore, the PBAT of take prepares a kind of biodegradable fiber that meets environmental protection and sustainable development requirement as raw material, can expand its Application Areas, has important market significance.
Chinese patent CN 101760796A has introduced a kind of preparation method of PBT false-twist textured yarn, and the intensity of the fiber obtaining by the method is 30.91-35.52cN/tex, and percentage elongation is 30-60%, has fabulous elasticity of elongation response rate and soft chromatophilous feature.But its spinning temperature is higher, easily produce thermal degradation phenomenon.Kan Ruijun adopts PBAT to change the crystal habit of PHBV, and the relatively pure PHBV of PHBV/PBAT blend has wider process window, has widened its melting spinnability, but the effect of the melt spraying non-woven fabrics of its blend is also bad, need further to be improved (Donghua University, Master's thesis, 2010).Neat China adopts electrostatic spinning technique to prepare the ultrafine fiber felt of PHBV/Ecoflex (PBAT) co-mixing system, and analyzed the impact that the average diameter of electrospinning fibre and diameter are distributed that adds of Ecoflex, but before spinning, need to configure PHBV/Ecoflex/ dichloromethane solution, technique more complicated (synthetic technology and application, 2008).
For the problems referred to above, the present invention carries out melt spinning after adopting PBAT and other macromolecular material blend, wherein, it is high to be used for the molecular weight of linear polyester of spinning, and during distribution uniform, the better performances of the fiber obtaining lengthens cooling distance in spinning process, thereby effectively improved in PBAT spinning process, be difficult for cooling, the easy problem of bonding.While is simple for process, can improve the performance of PBAT fiber, effectively widens the Application Areas of PBAT fibrous material.
Summary of the invention
Object of the present invention is exactly that a kind of biodegradable fiber containing PBAT with good spinnability, higher mechanical strength and continual and steady soft feel and preparation method thereof is provided in order to overcome the defect that above-mentioned prior art exists.
Object of the present invention can be achieved through the following technical solutions:
Containing a biodegradable fiber of PBAT, by the component that comprises following weight portion, made:
Poly-adipic acid/butylene terephthalate (PBAT) 30-90 part
High molecular polymer 10-70 part.
The fusing point of described poly-adipic acid/butylene terephthalate is 110～160 ℃, and heat decomposition temperature is higher than 300 ℃, and weight average molecular weight is 4～120,000, and molecular weight dispersity is 1.5～3.
The fusing point of described poly-adipic acid/butylene terephthalate is preferably 130～150 ℃, and weight average molecular weight is preferably 8～100,000, and molecular weight dispersity is preferably 2～2.5.
Described high molecular polymer is selected from one or both in poly butyric (PHB), poly butyric-valerate (PHBV), poly butylene succinate (PBS) or PLA (PLA).
The weight average molecular weight of described poly butyric is 7～300,000, the weight average molecular weight of described poly butyric-valerate is 10～400,000, the weight average molecular weight of described poly butylene succinate is 9～150,000, and the weight average molecular weight of described PLA is 6～160,000.
A preparation method who contains the biodegradable fiber of PBAT, the method comprises the following steps:
(1) will gather adipic acid/butylene terephthalate and high molecular polymer vacuumize to moisture is below 100ppm;
(2) carry out melt spinning after dried poly-adipic acid/butylene terephthalate is mixed in proportion with high molecular polymer, and cooling, around roll forming, directly obtain the preliminary draft silk containing the biodegradable fiber of PBAT.
After the method can also be mixed dried poly-adipic acid/butylene terephthalate with high molecular polymer in proportion, with double screw extruder melt blending, extrude, granulation, obtain blended particles; By blended particles vacuumize to moisture, be to carry out melt spinning after below 100ppm again, and cooling, around roll forming, obtain the preliminary draft silk containing the biodegradable fiber of PBAT.
The described vacuum drying time is 24～48 hours, vacuum drying temperature is 70～100 ℃, and the temperature of described melt spinning is 180～245 ℃, and described being cooled to adopts and lengthen apart from cooling, cooling distance is 3～5m, and the speed of coiling is 500～1500m/min.
Described melt spinning adopts screw type spinning machine.
The described temperature of extruding is 170～220 ℃, and the rotating speed of the screw rod of double screw extruder is 100～500rpm.
Compared with prior art, the present invention has the following advantages and beneficial effect:
Compare with common PBAT fiber, the fiber that the present invention obtains has good spinnability, higher mechanical strength and continual and steady soft feel, therefore can expand its Application Areas, is widely used in the fields such as weaving.Preparation method of the present invention is simple, easy to operate simultaneously, and general spinning equipment gets final product industrial production, and without carrying out scrap build, saves cost.In the present invention, by adding high molecular polymer, improve the performance of PBAT fiber, adopt the mode that lengthens cooling distance, effectively improve the problem of strand bonding in spinning process, obtain well behaved fibrous material.
Accompanying drawing explanation
Fig. 1 is the structural representation of screw type spinning machine.
The specific embodiment
Below in conjunction with the drawings and specific embodiments, the present invention is described in detail.
Embodiment 1
(1) by polybutylene terephthalate-tetramethylene adipate (PBAT, weight average molecular weight is 100,000), poly butyric-valerate (PHBV, weight average molecular weight is 300,000) and PLA (PLA, weight average molecular weight is 80,000) particle carries out vacuumize, to moisture be 100ppm, baking temperature is 95 ℃, drying time 30h.
(2) after the PHBV that gets dried 47 parts of PBAT, 45 parts of PLA and 8 parts mixes, with double screw extruder melt blending, extruding pelletization, make master batch, extrusion temperature is 180 ℃, and screw speed is 300rpm.
(3) master batch is dried to moisture and reaches 100ppm, the melting of the hopper 1 in screw type spinning machine as shown in Figure 1, screw rod 2, casing 3, measuring pump 4, extrude, filter, measure processing, from spinnerets 5, extrude, after lengthening distance 6 is cooling, through boundling oiling device 7 and take up roll 8, obtain the biodegradable fiber containing PBAT.
Wherein, 190 ℃ of spinning temperatures, I district/II district/III district/IV district temperature is respectively 180/190/190/190 ℃, spin manifold temperature is 190 ℃, pipe temperature is 190 ℃, and measuring pump temperature is 190 ℃, winding speed 800m/min, cooling distance is 3m, making fibre strength is 1.5cN/tex, and degree of stretching is 69%, soft, at room temperature place after one week, feel is still soft.
Embodiment 2
(1) by polybutylene terephthalate-tetramethylene adipate (PBAT, weight average molecular weight is 120,000), poly butyric-valerate (PHBV, weight average molecular weight is 200,000) particle carries out vacuumize, to moisture be 100ppm, baking temperature is 80 ℃, drying time 48h.
(2) getting dried 30 parts of PBAT, the PHBV of 70 parts mixes melting by the hopper 1 in screw type spinning machine as shown in Figure 1, screw rod 2, casing 3, measuring pump 4, extrudes, filters, measures processing, from spinnerets 5, extrude, after lengthening distance 6 is cooling, through boundling oiling device 7 and take up roll 8, obtain the biodegradable fiber containing PBAT.
Wherein, 200 ℃ of spinning temperatures, I district/II district/III district/IV district temperature is respectively 190/200/200/200 ℃, spin manifold temperature is 200 ℃, pipe temperature is 200 ℃, and measuring pump temperature is 200 ℃, winding speed 1200m/min, cooling distance is 4m, making fibre strength is 1.1cN/tex, and degree of stretching is 92%, soft, at room temperature place after one week, feel is still soft.
Embodiment 3
(1) by polybutylene terephthalate-adipic acid fourth diester (PBAT, weight average molecular weight is 60,000), poly butylene succinate (PBS, weight average molecular weight is 100,000) particle carries out vacuumize, to moisture be 100ppm, baking temperature is 85 ℃, drying time 40h.
(2) getting dried 90 parts of PBAT, the PBS of 10 parts mixes melting by hopper 1, screw rod 2, casing 3, measuring pump 4, extrudes, filters, measures processing, from spinnerets 5, extrude, after lengthening distance 6 is cooling, through boundling oiling device 7 and take up roll 8, obtain the biodegradable fiber containing PBAT.
Wherein, 245 ℃ of spinning temperatures, I district/II district/III district/IV district temperature is respectively 235/245/245/245 ℃, and spin manifold temperature is 245 ℃, and pipe temperature is 245 ℃, measuring pump temperature is 245 ℃, winding speed 1500m/min, cooling distance is 3.5m, making fibre strength is 1.2cN/tex, degree of stretching is 84%, soft.
Embodiment 4
(1) by polybutylene terephthalate-tetramethylene adipate (PBAT, weight average molecular weight is 100,000) and PLA (PLA, weight average molecular weight is 120,000) particle carry out vacuumize, to moisture be 100ppm, baking temperature is 95 ℃, drying time 28h.
(2) get dried 65 parts of PBAT, 35 parts of rear double screw extruder melt blending, extruding pelletizations used of PLA particles mixing, make master batch, extrusion temperature is 170 ℃, and screw speed is 100rpm.
(3) then master batch is dried to moisture and reaches 100ppm, through the melting of hopper 1, screw rod 2, casing 3, measuring pump 4, extrude, filter, measure processing, from spinnerets 5, extrude, after lengthening distance 6 is cooling, through boundling oiling device 7 and take up roll 8, obtain the biodegradable fiber containing PBAT.
Wherein, 210 ℃ of spinning temperatures, I district/II district/III district/IV district temperature is respectively 200/210/210/210 ℃, and spin manifold temperature is 210 ℃, pipe temperature is 210 ℃, measuring pump temperature is 210 ℃, winding speed 1000m/min, and cooling distance is 4m, making fibre strength is 1.4cN/tex, degree of stretching is 78%, soft.
Embodiment 5
(1) by polybutylene terephthalate-tetramethylene adipate (PBAT, weight average molecular weight is 40,000), PLA (PLA, weight average molecular weight is 60,000) and poly butylene succinate (PBS, weight average molecular weight is 90,000) particle carries out vacuumize, to moisture be 100ppm, baking temperature is 85 ℃, drying time 30h.
(2) get after dried 40 parts of PBAT, 40 parts of PLA and 20 parts of PBS particles mix and use double screw extruder melt blending, extruding pelletization, make master batch, extrusion temperature is 190 ℃, and screw speed is 500rpm.
(3) then master batch is dried to moisture and reaches 100ppm, through the melting of hopper 1, screw rod 2, casing 3, measuring pump 4, extrude, filter, measure processing, from spinnerets 5, extrude, after lengthening distance 6 is cooling, through boundling oiling device 7 and take up roll 8, obtain the biodegradable fiber containing PBAT.
Wherein, 220 ℃ of spinning temperatures, I district/II district/III district/IV district temperature is respectively 210/220/220/220 ℃, and spin manifold temperature is 220 ℃, and pipe temperature is 220 ℃, measuring pump temperature is 220 ℃, winding speed 500m/min, cooling distance is 3.5m, making fibre strength is 1.7cN/tex, degree of stretching is 53%, soft.
Embodiment 6
(1) by polybutylene terephthalate-tetramethylene adipate (PBAT, weight average molecular weight is 90,000), poly butyric (PHB, weight average molecular weight is 170,000) particle carries out vacuumize, to moisture be 100ppm, baking temperature is 80 ℃, drying time 48h.
(2) getting dried 70 parts of PBAT, the PHB of 30 parts mixes melting by hopper 1, screw rod 2, casing 3, measuring pump 4, extrudes, filters, measures processing, from spinnerets 5, extrude, after lengthening distance 6 is cooling, through boundling oiling device 7 and take up roll 8, obtain the biodegradable fiber containing PBAT.
Wherein, 230 ℃ of spinning temperatures, I district/II district/IN district/IV district temperature is respectively 220/230/230/230 ℃, and spin manifold temperature is 230 ℃, and pipe temperature is 230 ℃, measuring pump temperature is 230 ℃, winding speed 900m/min, cooling distance is 4.5m, making fibre strength is 1.3cN/tex, degree of stretching is 77%, soft.
Embodiment 7
Containing a biodegradable fiber of PBAT, by the component that comprises following weight portion, made:
30 parts of poly-adipic acid/butylene terephthalate (PBAT)
70 parts of high molecular polymers.
Wherein, the fusing point of poly-adipic acid/butylene terephthalate is 110 ℃, and heat decomposition temperature is higher than 300 ℃, and weight average molecular weight is 80,000, and molecular weight dispersity is 1.5.
High molecular polymer is the mixture of poly butyric (PHB) and poly butyric-valerate (PHBV), respectively accounts for 35 parts.Wherein the weight average molecular weight of poly butyric is 70,000, and the weight average molecular weight of poly butyric-valerate is 100,000.
A preparation method who contains the biodegradable fiber of PBAT, the method comprises the following steps:
(1) will gather adipic acid/butylene terephthalate and high molecular polymer vacuumize to moisture is below 100ppm;
(2) dried poly-adipic acid/butylene terephthalate is mixed in proportion with high molecular polymer, with double screw extruder melt blending, extrude, granulation, obtain blended particles;
(3) it is that 100ppm adopts screw type spinning machine to carry out melt spinning after following that blended particles step (2) being obtained is dried to moisture, and cooling, around roll forming, obtain the preliminary draft silk containing the biodegradable fiber of PBAT.
The vacuum drying time of step (1) is 24 hours, and vacuum drying temperature is 100 ℃; The temperature that step (2) is extruded is 220 ℃, and the rotating speed of screw rod is 500rpm; The temperature of step (3) melt spinning is 180 ℃, is cooled to adopt to lengthen apart from cooling, and cooling distance is 3m, and the speed of coiling is 500m/min.Making fibre strength is 1.2cN/tex, and degree of stretching is 80%, and feel is more soft.
Embodiment 8
Containing a biodegradable fiber of PBAT, by the component that comprises following weight portion, made:
90 parts of poly-adipic acid/butylene terephthalate (PBAT)
10 parts of high molecular polymers.
Wherein, the fusing point of poly-adipic acid/butylene terephthalate is 130 ℃, and heat decomposition temperature is higher than 300 ℃, and weight average molecular weight is 80,000, and molecular weight dispersity is 2.
High molecular polymer is the mixture of poly butyric (PHB) and PLA (PLA), respectively accounts for 5 parts.Wherein, the weight average molecular weight of poly butyric is 300,000, and the weight average molecular weight of PLA is 160,000.
A preparation method who contains the biodegradable fiber of PBAT, the method comprises the following steps:
(1) will gather adipic acid/butylene terephthalate and high molecular polymer vacuumize to moisture is below 100ppm;
(2) carry out melt spinning after dried poly-adipic acid/butylene terephthalate is mixed in proportion with high molecular polymer, and cooling, around roll forming, directly obtain the preliminary draft silk containing the biodegradable fiber of PBAT.
Melt spinning adopts screw type spinning machine.
The vacuum drying time of step (1) is 48 hours, and vacuum drying temperature is that the temperature of 70 ℃ of steps (2) melt spinning is 180 ℃, is cooled to adopt to lengthen apart from cooling, and cooling distance is 5m, and the speed of coiling is 1500m/min.Making fibre strength is 1.4cN/tex, and degree of stretching is 91%, soft.
Embodiment 9
Containing a biodegradable fiber of PBAT, by the component that comprises following weight portion, made:
50 parts of poly-adipic acid/butylene terephthalate (PBAT)
50 parts of high molecular polymers.
Wherein, the fusing point of poly-adipic acid/butylene terephthalate is 150 ℃, and heat decomposition temperature is higher than 300 ℃, and weight average molecular weight is 100,000, and molecular weight dispersity is 2.5.
High molecular polymer is the mixture of poly butyric-valerate (PHBV) and poly butylene succinate (PBS), respectively accounts for 25 parts.Wherein, the weight average molecular weight of poly butyric-valerate is 400,000, and the weight average molecular weight of poly butylene succinate is 150,000.
A preparation method who contains the biodegradable fiber of PBAT, the method comprises the following steps:
(1) will gather adipic acid/butylene terephthalate and high molecular polymer vacuumize to moisture is below 100ppm;
(2) dried poly-adipic acid/butylene terephthalate is mixed in proportion with high molecular polymer, with double screw extruder melt blending, extrude, granulation, obtain blended particles;
(3) it is that 100ppm adopts screw type spinning machine to carry out melt spinning after following that blended particles step (2) being obtained is dried to moisture, and cooling, around roll forming, obtain the preliminary draft silk containing the biodegradable fiber of PBAT.
The vacuum drying time of step (1) is 48 hours, and vacuum drying temperature is 70 ℃; The temperature that step (2) is extruded is 170 ℃, and the rotating speed of screw rod is 400rpm; The temperature of step (3) melt spinning is 180 ℃, is cooled to adopt to lengthen apart from cooling, and cooling distance is 4.5m, and the speed of coiling is 1000m/min.Making fibre strength is 1.2cN/tex, and degree of stretching is 71%, soft.
Embodiment 10
Containing a biodegradable fiber of PBAT, by the component that comprises following weight portion, made:
60 parts of poly-adipic acid/butylene terephthalate (PBAT)
40 parts of high molecular polymers.
Wherein, the fusing point of poly-adipic acid/butylene terephthalate is 160 ℃, and heat decomposition temperature is higher than 300 ℃, and weight average molecular weight is 80,000, and molecular weight dispersity is 3.
High molecular polymer is selected from poly butyric (PHB).Wherein, the weight average molecular weight of poly butyric is 200,000.
A preparation method who contains the biodegradable fiber of PBAT, the method comprises the following steps:
(1) will gather adipic acid/butylene terephthalate and high molecular polymer vacuumize to moisture is below 100ppm;
(2) carry out melt spinning after dried poly-adipic acid/butylene terephthalate is mixed in proportion with high molecular polymer, and cooling, around roll forming, directly obtain the preliminary draft silk containing the biodegradable fiber of PBAT.
Wherein, melt spinning adopts screw type spinning machine.The vacuum drying time of step (1) is 24 hours, and vacuum drying temperature is 100 ℃; The temperature of step (2) melt spinning is 245 ℃, is cooled to adopt to lengthen apart from cooling, and cooling distance is 5m, and the speed of coiling is 800m/min.Making fibre strength is 1.1cN/tex, and degree of stretching is 87%, soft.
Comparative example 1
(1) polybutylene terephthalate-tetramethylene adipate (PBAT, weight average molecular weight is 80,000) particle is carried out to vacuumize, to moisture be 100ppm, baking temperature is 80 ℃, drying time 24h.
(2) by dried PBAT through the melting of hopper 1, screw rod 2, casing 3, measuring pump 4, extrude, filter, measure processing, from spinnerets 5, extrude, lengthen distance 6 cooling after, through boundling oiling device 7 and take up roll 8, obtain PBAT biodegradable fiber.
Wherein, 240 ℃ of spinning temperatures, I district/II district/III district/IV district temperature is respectively 230/240/240/240 ℃, and spin manifold temperature is 240 ℃, and pipe temperature is 240 ℃, measuring pump temperature is 240 ℃, winding speed 1000m/min, cooling distance is 4m, making fibre strength is 0.78eN/tex, degree of stretching is 237%, soft.Its intensity is 0.78cN/tex, and degree of stretching is 237%.In spinning process, there is bonding and fracture of wire phenomenon, the fibre strength of making is poor.
Comparative example 2
(1) by polybutylene terephthalate-5 diacid butanediol ester (PBAT, weight average molecular weight is 80,000) and poly butylene succinate (PBS, weight average molecular weight is 120,000) carry out vacuumize, to moisture be 100ppm, baking temperature is 90 ℃, drying time 30h.
(2) get after dried 95 parts of PBAT and 5 parts of PBS mix and use double screw extruder melt blending, extruding pelletization, make master batch, extrusion temperature is 180 ℃, and screw speed is 200rpm.
(3) then master batch is dried to moisture and reaches 100ppm, through the melting of hopper 1, screw rod 2, casing 3, measuring pump 4, extrude, filter, measure processing, from spinnerets 5, extrude, after lengthening distance 6 is cooling, through boundling oiling device 7 and take up roll 8, obtain the biodegradable fiber containing PBAT.
Wherein, 220 ℃ of spinning temperatures, I district/II district/III district/IV district temperature is respectively 210/220/220/220 ℃, and spin manifold temperature is 220 ℃, and pipe temperature is 220 ℃, measuring pump temperature is 220 ℃, winding speed 900m/min, cooling distance is 3.5m, making fibre strength is 0.71cN/tex, degree of stretching is 241%, soft.Because PBS addition is too little, and through twice melting process, spinnability declines, and occurs fracture of wire phenomenon.
Comparative example 3
(1) PLA (PLA, weight average molecular weight is 80,000) is carried out to vacuumize, to moisture be 100ppm, baking temperature is I00 ℃, drying time 32h.
(2) by dried PLA through the melting of hopper 1, screw rod 2, casing 3, measuring pump 4, extrude, filter, measure processing, from spinnerets 5, extrude, lengthen distance 6 cooling after, through boundling oiling device 7 and take up roll 8, obtain PLA fiber.
Wherein, 250 ℃ of spinning temperatures, I district/II district/III district/IV district temperature is respectively 240/250/250/250 ℃, and spin manifold temperature is 250 ℃, pipe temperature is 250 ℃, measuring pump temperature is 250 ℃, winding speed 1000m/min, and cooling distance is 5m, making fibre strength is 2.35cN/tex, degree of stretching is that 89%, PLA fiber is nonelastic and hard, has limited its Application Areas.
Result by above embodiment and comparative example is known, the biodegradable fiber containing PBAT obtaining in the present invention, and its intensity >=1.1eN/dtex, degree of stretching is 70-100%.After cooling lengthening distance, can effectively improve the adhesion problem that spinning process occurs, PBAT has good elasticity and heat resistance simultaneously, with after other degradable high polymer material blend, carry out spinning, not only can improve the performance of blended fiber, and the fiber containing PBAT obtaining is soft, still has degradability.
Claims (10)
1. containing a biodegradable fiber of PBAT, it is characterized in that, by the component that comprises following weight portion, made:
Poly-adipic acid/butylene terephthalate (PBAT) 30-90 part
High molecular polymer 10-70 part.
2. a kind of biodegradable fiber containing PBAT according to claim 1, it is characterized in that, the fusing point of described poly-adipic acid/butylene terephthalate is 110～160 ℃, and heat decomposition temperature is higher than 300 ℃, weight average molecular weight is 4～120,000, and molecular weight dispersity is 1.5～3.
3. a kind of biodegradable fiber containing PBAT according to claim 2, is characterized in that, the fusing point of described poly-adipic acid/butylene terephthalate is preferably 130～150 ℃, and weight average molecular weight is preferably 8～100,000, and molecular weight dispersity is preferably 2～2.5.
4. a kind of biodegradable fiber containing PBAT according to claim 1, is characterized in that, described high molecular polymer is selected from one or both in poly butyric, poly butyric-valerate, poly butylene succinate or PLA.
5. a kind of biodegradable fiber containing PBAT according to claim 4, it is characterized in that, the weight average molecular weight of described poly butyric is 7～300,000, the weight average molecular weight of described poly butyric-valerate is 10～400,000, the weight average molecular weight of described poly butylene succinate is 9～150,000, and the weight average molecular weight of described PLA is 6～160,000.
6. a preparation method for the biodegradable fiber containing PBAT as described in as arbitrary in claim 1～5, is characterized in that, the method comprises the following steps:
(1) will gather adipic acid/butylene terephthalate and high molecular polymer vacuumize to moisture is below 100ppm;
(2) carry out melt spinning after dried poly-adipic acid/butylene terephthalate is mixed in proportion with high molecular polymer, and cooling, around roll forming, directly obtain the preliminary draft silk containing the biodegradable fiber of PBAT.
7. the preparation method of a kind of biodegradable fiber containing PBAT according to claim 6, it is characterized in that, after the method can also be mixed dried poly-adipic acid/butylene terephthalate with high molecular polymer in proportion, with double screw extruder melt blending, extrude, granulation, obtain blended particles; By blended particles vacuumize to moisture, be to carry out melt spinning after below 100ppm again, and cooling, around roll forming, obtain the preliminary draft silk containing the biodegradable fiber of PBAT.
8. according to the preparation method of a kind of biodegradable fiber containing PBAT described in claim 6 or 7, it is characterized in that, the described vacuum drying time is 24～48 hours, vacuum drying temperature is 70～100 ℃, the temperature of described melt spinning is 180～245 ℃, described being cooled to adopts lengthening distance cooling, and cooling distance is 3～5m, and the speed of coiling is 500～1500m/min.
9. according to the preparation method of a kind of biodegradable fiber containing PBAT described in claim 6 or 7, it is characterized in that, described melt spinning adopts screw type spinning machine.
10. the preparation method of a kind of biodegradable fiber containing PBAT according to claim 7, is characterized in that, the described temperature of extruding is 170～220 ℃, and the rotating speed of the screw rod of double screw extruder is 100～500rpm.
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| CN115305600B (en) * | 2022-08-30 | 2024-03-01 | 珠海麦得发生物科技股份有限公司 | Fiber yarn and preparation method and application thereof |
| CN116084052A (en) * | 2022-12-12 | 2023-05-09 | 东华大学 | Preparation method of soft and skin-friendly modified polylactic acid fiber |
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