CN107299414B - High molecular weight dextrorotation polylactic acid-low molecular weight l-lactic acid blended fiber preparation method and product - Google Patents
High molecular weight dextrorotation polylactic acid-low molecular weight l-lactic acid blended fiber preparation method and product Download PDFInfo
- Publication number
- CN107299414B CN107299414B CN201710543063.5A CN201710543063A CN107299414B CN 107299414 B CN107299414 B CN 107299414B CN 201710543063 A CN201710543063 A CN 201710543063A CN 107299414 B CN107299414 B CN 107299414B
- Authority
- CN
- China
- Prior art keywords
- molecular weight
- polylactic acid
- lactic acid
- high molecular
- low molecular
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Classifications
-
- D—TEXTILES; PAPER
- D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
- D01F—CHEMICAL FEATURES IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS; APPARATUS SPECIALLY ADAPTED FOR THE MANUFACTURE OF CARBON FILAMENTS
- D01F8/00—Conjugated, i.e. bi- or multicomponent, artificial filaments or the like; Manufacture thereof
- D01F8/04—Conjugated, i.e. bi- or multicomponent, artificial filaments or the like; Manufacture thereof from synthetic polymers
- D01F8/14—Conjugated, i.e. bi- or multicomponent, artificial filaments or the like; Manufacture thereof from synthetic polymers with at least one polyester as constituent
-
- D—TEXTILES; PAPER
- D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
- D01D—MECHANICAL METHODS OR APPARATUS IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS
- D01D10/00—Physical treatment of artificial filaments or the like during manufacture, i.e. during a continuous production process before the filaments have been collected
- D01D10/02—Heat treatment
-
- D—TEXTILES; PAPER
- D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
- D01D—MECHANICAL METHODS OR APPARATUS IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS
- D01D5/00—Formation of filaments, threads, or the like
- D01D5/08—Melt spinning methods
-
- D—TEXTILES; PAPER
- D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
- D01D—MECHANICAL METHODS OR APPARATUS IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS
- D01D5/00—Formation of filaments, threads, or the like
- D01D5/12—Stretch-spinning methods
Abstract
The present invention relates to a kind of high molecular weight dextrorotation polylactic acid-low molecular weight l-lactic acid blended fiber preparation methods, include the following steps: 1) by high molecular weight dextrorotation polylactic acid and low molecular weight l-lactic acid by melting mixing, extruding pelletization obtains blend；The mass fraction of high molecular weight dextrorotation polylactic acid is 5~50% in the blend, and the mass fraction of the low molecular weight l-lactic acid is 50~95%；2) blend is subjected to melt spinning to get high molecular weight dextrorotation polylactic acid-low molecular weight l-lactic acid blended fiber.The invention further relates to the products that above-mentioned preparation method is prepared.The preparation method has a simple process, and production technology is controllable.Prepared polylactic acid blend fiber has shish-kebab superlattice structure abundant, and crystallinity is 40~60%, and heated dry air shrinking percentage is 3.0~6.0%, and boiling water shrinkage is 0.3~2.0%.
Description
Technical field
The present invention relates to the preparation fields of acid fiber by polylactic, and in particular to a kind of high molecular weight dextrorotation polylactic acid-low molecule
Measure the preparation method and product of l-lactic acid blended fiber.
Background technique
Polylactic acid (Poly Lactic Acid, PLA) is by the various reproducible natural moneys such as starch, cellulose, polysaccharide
Source by hydrolysis, fermenting is made lactic acid, aggregated obtained new polyester material, be it is a kind of can be degradable it is environmentally friendly
Resin.
Polylactic acid has excellent biocompatibility, good mechanical performance and physical property, so that it is in packaging, biology
The fields such as medical treatment, automotive electronics have a wide range of applications, and also have potential application value in chemical fibre and non-woven field.
But at this stage, since the crystallization of polylactic acid is slow, even during the spinning process under strongly tensile flow field active force, according to
So it is difficult to obtain the PLA fiber of high-crystallinity (55-60%).And thermal stability poor caused by low-crystallinity (20-30%)
Seriously affect its service performance.
Acid fiber by polylactic is solved to be to improve its thermal stability using the critical issue of limitation.Usually solve its thermal stability
Mode can be by improving its crystallinity, as Chinese invention patent (106366594 A of CN) is open a kind of three-dimensional containing polylactic acid
The preparation method of the high-toughness polylactic acid blend of compound, this method using the dextrorotation polylactic acid of high-optical-purity as nucleating agent and
L-lactic acid mixes at room temperature, obtains the high-toughness polylactic acid blend of the stereo complex containing polylactic acid.This method is logical
Raising crystallinity is crossed to improve its heat resistance, compared to its heat resistance is improved by crystallinity, the change of crystal habit is to resistance to
Hot improvement is more effective.
Summary of the invention
In view of the above-mentioned deficiencies in the prior art, it is an object of the present invention to provide a kind of high molecular weight dextrorotation polylactic acid-low molecule
The preparation method and product of l-lactic acid blended fiber are measured, it is super brilliant that this method can be improved shish-kebab in blended fiber
The content of lattice structure, and the heated dry air shrinking percentage and boiling water shrinkage of blended fiber can be greatly lowered, acquisition can be extensive
The high heat resistance blended fiber of application.
Technical solution provided by the present invention are as follows:
A kind of preparation method of high molecular weight dextrorotation polylactic acid-low molecular weight l-lactic acid blended fiber, including it is as follows
Step:
1) high molecular weight dextrorotation polylactic acid and low molecular weight l-lactic acid are passed through into melting mixing, extruding pelletization obtains
Blend；The mass fraction of high molecular weight dextrorotation polylactic acid is 5~50% in the blend, the left-handed poly- cream of low molecular weight
The mass fraction of acid is 50~95%；
2) blend melt spinning is carried out to be blended to get high molecular weight dextrorotation polylactic acid-low molecular weight l-lactic acid
Fiber.
It in above-mentioned technical proposal, is blended by high molecular weight dextrorotation polylactic acid and low molecular weight l-lactic acid, and through molten
Melt spinning and obtains blended fiber.On the one hand, high molecular weight dextrorotation polylactic acid (HPDLA) long-chain is intertwine with each other in blend, such as Fig. 1
It is shown during the spinning process, the long-chain entanglement network of overlapped entanglement under outer field action carries the low molecular weight of network internal
The short deformation of chain of l-lactic acid (hereinafter referred to as LPLLA), orientation, effectively the presoma of inductive formation shish nucleus, is flowing
Play the role of in field induction nucleation key.
On the other hand, HPDLA and LPLLA is that structure body, HPDLA and LPLLA enantiomer spiral point are found in two different mappings
There are special CH between subchain3With O=C interaction of hydrogen bond, and this interaction of hydrogen bond can drive Stereocomplex
The generation of crystal, fusing point are about 50 DEG C high compared with the one pack system crystal of PDLA or PLLA.It flows under field action, the entanglement network of HPDLA
LPLLA can be swept along to be orientated, then be expected to a possibility that increasing the contact of LPLLA and HPDLA segment, strengthen the short chain of LPLLA and HPDLA
The interaction of hydrogen bond of long-chain.
By the synergistic effect of above two mechanism, promote shish-kebab abundant in LPLLA super brilliant using HPDLA
The generation of lattice structure, to obtain the polylactic acid blend fiber that thermal stability significantly improves.
Preferably, melting mixing uses masterbatch and low molecular weight l-lactic acid as raw material in the step 1).
Preferably, the preparation of the masterbatch: high molecular weight dextrorotation polylactic acid and low molecular weight l-lactic acid are dissolved in
Methylene chloride, and pour into ethyl alcohol, sediment is obtained, obtains masterbatch after drying.
Preferably, the mass ratio of high molecular weight dextrorotation polylactic acid and low molecular weight l-lactic acid is 1 in the masterbatch:
0.9~1.1.Further preferably 1:1.
Preferably, the temperature of melting mixing is 220~250 DEG C in the step 1).Further preferably 240 DEG C.
Preferably, in the step 2) melt spinning condition are as follows: 240~265 DEG C of spinning temperature, winding rate 100~
500m/min, 100~180 DEG C of hot gas spring temperature, draw ratio 1~5.
Preferably, the weight average molecular weight of the high molecular weight dextrorotation polylactic acid is 5~19 × 105G/mol, low molecular weight are left
The weight average molecular weight for revolving polylactic acid is 1.5~3 × 105g/mol。
The present invention also provides a kind of high molecular weight dextrorotation polylactic acid-low molecular weights being prepared such as above-mentioned preparation method
L-lactic acid blended fiber.The blended fiber have shish-kebab superlattice structure abundant, crystallinity be 40~
60%, heated dry air shrinking percentage is 3.0~6.0%, and boiling water shrinkage is 0.3~2.0%.
Compared with the existing technology, the beneficial effects of the present invention are embodied in:
(1) preparation method process provided by the present invention is simple, and production technology is controllable.
(2) polylactic acid blend fiber fully biodegradable provided by the present invention, thus the fiber cannot be only used for work
Journey field, it may also be used for medicine and hygiene fields.
(3) HPDLA long-chain is intertwine with each other in polylactic acid blend fiber provided by the present invention, under outer field action, mutually
The long-chain entanglement network that overlapping is tangled carries the short deformation of chain of LPLLA of network internal, orientation, and HPDLA and LPLLA strand it
Between there are strong interaction of hydrogen bond, not only contribute to the generation for promoting shish, and may advantageously facilitate and generated
The stability of shish, and the short chain crystallization that stable shish further causes surrounding unperturbed state generates kebab, ultimately forms
Shish-kebab superlattice structure, obtains polylactic acid blend fiber that thermal stability significantly improves, and crystallinity is 40~
60%, heated dry air shrinking percentage is 3.0~6.0%, and boiling water shrinkage is 0.3~2.0%.
Detailed description of the invention
Fig. 1 is the flow diagram that blended fiber forms shish-kebab superlattice structure during the spinning process.
Specific embodiment
Below with reference to specific embodiment, the invention will be further described.
Embodiment 1
Taking weight average molecular weight is 5 × 105The HPDLA and weight average molecular weight of g/mol is 1.5 × 105The LPLLA conduct of g/mol
Raw material.
10gHPDLA and 10gLPLLA are dissolved in 150ml methylene chloride, magnetic agitation 3h under normal temperature condition will be mixed molten
Liquid is poured into while stirring in 50ml dehydrated alcohol, the sediment that HPDLA/LPLLA mass ratio is 1:1 is obtained, in vacuum drying oven
In be dried to obtain masterbatch.
By 10g above-mentioned masterbatch and 40g LPLLA, melting extrusion is granulated under the conditions of miniature extruder, 240 DEG C, is obtained
HPDLA/LPLLA blend；
By the blend in 240 DEG C of spinning temperature, wind rate 100m/min, 100 DEG C of hot gas spring temperature, draw ratio 2
PLA blended fiber is made in melt spinning under conditions of times.
Specific test method: 1) it using the hot air shrinkage of single fiber thermal contraction test instrument test PLA blended fiber, surveys
Examination temperature is set as 140 DEG C, testing time 30min.2) boiling shrinkage of PLA blended fiber is tested under standard atmospheric conditions
Rate, testing time 30min.
Percent thermal shrinkage is calculate by the following formula:
In formula, L0For the initial length of fiber, L is the final lengths of the fiber after overheat contraction.
It is 5.5% that the PLA blended fiber, which measures its hot air shrinkage through single fiber thermal contraction test instrument,；In normal atmosphere
Under the conditions of measure its boiling water shrinkage be 1.6%, crystallinity 42%, Herman orientation index be 0.18.
Embodiment 2
Taking weight average molecular weight is 10 × 105The HPDLA and weight average molecular weight of g/mol is 1.5 × 105The LPLLA of g/mol makees
For raw material.
10gHPDLA and 10gLPLLA are dissolved in 150ml methylene chloride, magnetic agitation 3h under normal temperature condition will be mixed molten
Liquid is poured into while stirring in 50ml dehydrated alcohol, the sediment that HPDLA/LPLLA mass ratio is 1:1 is obtained, in vacuum drying oven
In be dried to obtain masterbatch.
By 10g above-mentioned masterbatch and 40g LPLLA, melting extrusion is granulated under the conditions of miniature extruder, 240 DEG C, is obtained
HPDLA/LPLLA blend；
By the blend in 250 DEG C of spinning temperature, rate 120m/min is wound, 120 DEG C of hot gas spring temperature, draw ratio is
PLA blended fiber is made in melt spinning under conditions of 2.5 times.
The test method of hot air shrinkage and boiling water shrinkage such as embodiment 1 is identical.
It is 4.6% that the PLA blended fiber, which measures its hot air shrinkage through single fiber thermal contraction test instrument,；In normal atmosphere
Under the conditions of measure its boiling water shrinkage be 1.3%, crystallinity 45%, Herman orientation index be 0.20.
Embodiment 3
Taking weight average molecular weight is 10 × 105The HPDLA and weight average molecular weight of g/mol is 1.5 × 105The LPLLA of g/mol makees
For raw material.
10gHPDLA and 10gLPLLA are dissolved in 150ml methylene chloride, magnetic agitation 3h under normal temperature condition will be mixed molten
Liquid is poured into while stirring in 50ml dehydrated alcohol, the sediment that HPDLA/LPLLA mass ratio is 1:1 is obtained, in vacuum drying oven
In be dried to obtain masterbatch.
By 10g above-mentioned masterbatch and 40g LPLLA, melting extrusion is granulated under the conditions of miniature extruder, 220 DEG C, is obtained
HPDLA/LPLLA blend；
By the blend in 255 DEG C of spinning temperature, rate 200m/min is wound, 120 DEG C of hot gas spring temperature, draw ratio is
PLA blended fiber is made in melt spinning under conditions of 3.5 times.
The test method of hot air shrinkage and boiling water shrinkage such as embodiment 1 is identical.
It is 3.9% that the PLA blended fiber, which measures its hot air shrinkage through single fiber thermal contraction test instrument,；In normal atmosphere
Under the conditions of measure its boiling water shrinkage be 1.0%, crystallinity 48%, Herman orientation index be 0.22.
Embodiment 4
Taking weight average molecular weight is 17 × 105The HPDLA and weight average molecular weight of g/mol is 2.5 × 105The LPLLA of g/mol makees
For raw material.
10gHPDLA and 10gLPLLA are dissolved in 150ml methylene chloride, magnetic agitation 3h under normal temperature condition will be mixed molten
Liquid is poured into while stirring in 50ml dehydrated alcohol, the sediment that HPDLA/LPLLA mass ratio is 1:1 is obtained, in vacuum drying oven
In be dried to obtain masterbatch.
By 10g above-mentioned masterbatch and 40g LPLLA, melting extrusion is granulated under the conditions of miniature extruder, 220 DEG C, is obtained
HPDLA/LPLLA blend；
By the blend in 255 DEG C of spinning temperature, rate 300m/min is wound, 130 DEG C of hot gas spring temperature, draw ratio is
PLA blended fiber is made in melt spinning under conditions of 3.5 times.
The test method of hot air shrinkage and boiling water shrinkage such as embodiment 1 is identical.
It is 3.5% that the PLA blended fiber, which measures its hot air shrinkage through single fiber thermal contraction test instrument,；In normal atmosphere
Under the conditions of measure its boiling water shrinkage be 0.8%, crystallinity 51%, Herman orientation index be 0.23.
Embodiment 5
Taking weight average molecular weight is 19 × 105The HPDLA and weight average molecular weight of g/mol is 3 × 105The LPLLA conduct of g/mol
Raw material.
10gHPDLA and 10gLPLLA are dissolved in 150ml methylene chloride, magnetic agitation 3h under normal temperature condition will be mixed molten
Liquid is poured into while stirring in 50ml dehydrated alcohol, the sediment that HPDLA/LPLLA mass ratio is 1:1 is obtained, in vacuum drying oven
In be dried to obtain masterbatch.
By 15g above-mentioned masterbatch and 35g LPLLA, melting extrusion is granulated under the conditions of miniature extruder, 240 DEG C, is obtained
HPDLA/LPLLA blend；
By the blend in 260 DEG C of spinning temperature, wind rate 500m/min, 150 DEG C of hot gas spring temperature, draw ratio 5
PLA blended fiber is made in melt spinning under conditions of times.
The test method of hot air shrinkage and boiling water shrinkage such as embodiment 1 is identical.
It is 3.2% that the PLA blended fiber, which measures its hot air shrinkage through single fiber thermal contraction test instrument,；In normal atmosphere
Under the conditions of measure its boiling water shrinkage be 0.5%, crystallinity 53%, Herman orientation index be 0.28.
Embodiment 6
Taking weight average molecular weight is 10 × 105The HPDLA and weight average molecular weight of g/mol is 2 × 105The LPLLA conduct of g/mol
Raw material.
10gHPDLA and 10gLPLLA are dissolved in 150ml methylene chloride, magnetic agitation 3h under normal temperature condition will be mixed molten
Liquid is poured into while stirring in 50ml dehydrated alcohol, the sediment that HPDLA/LPLLA mass ratio is 1:1 is obtained, in vacuum drying oven
In be dried to obtain masterbatch.
By 15g above-mentioned masterbatch and 35g LPLLA, melting extrusion is granulated under the conditions of miniature extruder, 200 DEG C, is obtained
HPDLA/LPLLA blend；
By the blend in 230 DEG C of spinning temperature, wind rate 500m/min, 150 DEG C of hot gas spring temperature, draw ratio 5
PLA blended fiber is made in melt spinning under conditions of times.
The test method of hot air shrinkage and boiling water shrinkage such as embodiment 1 is identical.
It is 3.0% that the PLA blended fiber, which measures its hot air shrinkage through single fiber thermal contraction test instrument,；In normal atmosphere
Under the conditions of measure its boiling water shrinkage be 0.3%, crystallinity 57%, Herman orientation index be 0.30.
Comparative example 1
It is 2 × 10 by weight average molecular weight5The LPLLA raw material 50g of g/mol passes through miniature extruder, melts under the conditions of 240 DEG C
Extruding pelletization obtains LPLLA pellet；
By the pellet in 240 DEG C of spinning temperature, wind rate 100m/min, 100 DEG C of hot gas spring temperature, draw ratio 2.5
PLA fiber is made in melt spinning under conditions of times.
The test method of hot air shrinkage and boiling water shrinkage such as embodiment 1 is identical.
It is 20% that the PLA fiber, which measures its hot air shrinkage through single fiber thermal contraction test instrument,；In standard atmosphere condition
Under measure its boiling water shrinkage be 7.8%, crystallinity 27%, Herman orientation index be 0.12.
Comparative example 2
It is 2 × 10 by weight average molecular weight5The LPLLA raw material 50g of g/mol passes through miniature extruder, melts under the conditions of 240 DEG C
Extruding pelletization obtains LPLLA pellet；
By the pellet in 250 DEG C of spinning temperature, wind rate 300m/min, 120 DEG C of hot gas spring temperature, draw ratio 4.5
PLA fiber is made in melt spinning under conditions of times.
The test method of hot air shrinkage and boiling water shrinkage such as embodiment 1 is identical.
It is 12% that the PLA fiber, which measures its hot air shrinkage through single fiber thermal contraction test instrument,；In standard atmosphere condition
Under measure its boiling water shrinkage be 4.5%, crystallinity 30%, Herman orientation index be 0.14.
Comparative example 3
It is 15 × 10 by weight average molecular weight5The LPLLA raw material 50g of g/mol passes through miniature extruder, melts under the conditions of 200 DEG C
Melt extruding pelletization, obtains LPLLA pellet；
By the pellet in 260 DEG C of spinning temperature, wind rate 300m/min, 130 DEG C of hot gas spring temperature, draw ratio 4.5
PLA fiber is made in melt spinning under conditions of times.
The test method of hot air shrinkage and boiling water shrinkage such as embodiment 1 is identical.
It is 23% that the PLA fiber, which measures its hot air shrinkage through single fiber thermal contraction test instrument,；In standard atmosphere condition
Under measure its boiling water shrinkage be 8.5%, crystallinity 34%, Herman orientation index be 0.15.
Claims (4)
1. a kind of high molecular weight dextrorotation polylactic acid-low molecular weight l-lactic acid blended fiber preparation method, which is characterized in that
Include the following steps:
1) high molecular weight dextrorotation polylactic acid and low molecular weight l-lactic acid are passed through into melting mixing, extruding pelletization is blended
Object；The mass fraction of high molecular weight dextrorotation polylactic acid is 5~50% in the blend, the low molecular weight l-lactic acid
Mass fraction is 50~95%；The weight average molecular weight of the high molecular weight dextrorotation polylactic acid is 5~19 × 105G/mol, low molecule
The weight average molecular weight for measuring l-lactic acid is 1.5~3 × 105g/mol；
2) blend is subjected to melt spinning to get high molecular weight dextrorotation polylactic acid-low molecular weight l-lactic acid blended fiber.
2. the preparation of high molecular weight dextrorotation polylactic acid according to claim 1-low molecular weight l-lactic acid blended fiber
Method, which is characterized in that the temperature of melting mixing is 220~250 DEG C in the step 1).
3. the preparation of high molecular weight dextrorotation polylactic acid according to claim 1-low molecular weight l-lactic acid blended fiber
Method, which is characterized in that the condition of melt spinning in the step 2) are as follows: 240~265 DEG C of spinning temperature, winding rate 100~
500m/min, 100~180 DEG C of hot gas spring temperature, draw ratio 1~5.
4. a kind of high molecular weight dextrorotation polylactic acid-low molecule that the preparation method as described in claims 1 to 3 is any is prepared
Measure l-lactic acid blended fiber.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710543063.5A CN107299414B (en) | 2017-07-05 | 2017-07-05 | High molecular weight dextrorotation polylactic acid-low molecular weight l-lactic acid blended fiber preparation method and product |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710543063.5A CN107299414B (en) | 2017-07-05 | 2017-07-05 | High molecular weight dextrorotation polylactic acid-low molecular weight l-lactic acid blended fiber preparation method and product |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107299414A CN107299414A (en) | 2017-10-27 |
| CN107299414B true CN107299414B (en) | 2019-11-29 |
Family
ID=60135330
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710543063.5A Active CN107299414B (en) | 2017-07-05 | 2017-07-05 | High molecular weight dextrorotation polylactic acid-low molecular weight l-lactic acid blended fiber preparation method and product |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107299414B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108129813B (en) * | 2018-01-12 | 2020-02-14 | 浙江海正生物材料股份有限公司 | Polylactic resin composition for injection molding material |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102409432A (en) * | 2010-09-19 | 2012-04-11 | 东丽纤维研究所（中国）有限公司 | High heat resistance polylactic acid fiber and preparation method thereof |
| CN102634866A (en) * | 2012-04-25 | 2012-08-15 | 中国科学院宁波材料技术与工程研究所 | Self-enhanced polylactic acid fiber and preparation method thereof |
| CN103088458A (en) * | 2013-01-27 | 2013-05-08 | 彭荣淮 | Pure polylactic acid tows as well as preparation method and cigarette filter trip thereof |
| CN103451764A (en) * | 2013-08-15 | 2013-12-18 | 苏州龙杰特种纤维股份有限公司 | Heat-resistant polylactic acid fiber and product thereof |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3471109B2 (en) * | 1995-03-08 | 2003-11-25 | トヨタ自動車株式会社 | Polylactic acid copolymer and molded product thereof |
| KR20130112464A (en) * | 2012-04-04 | 2013-10-14 | 현대자동차주식회사 | Sheath-core all-in-one poly lactic acid fiber and a fabrication process thereof |
-
2017
- 2017-07-05 CN CN201710543063.5A patent/CN107299414B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102409432A (en) * | 2010-09-19 | 2012-04-11 | 东丽纤维研究所（中国）有限公司 | High heat resistance polylactic acid fiber and preparation method thereof |
| CN102634866A (en) * | 2012-04-25 | 2012-08-15 | 中国科学院宁波材料技术与工程研究所 | Self-enhanced polylactic acid fiber and preparation method thereof |
| CN103088458A (en) * | 2013-01-27 | 2013-05-08 | 彭荣淮 | Pure polylactic acid tows as well as preparation method and cigarette filter trip thereof |
| CN103451764A (en) * | 2013-08-15 | 2013-12-18 | 苏州龙杰特种纤维股份有限公司 | Heat-resistant polylactic acid fiber and product thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| CN107299414A (en) | 2017-10-27 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| Huan et al. | Manufacture of electrospun all-aqueous poly (vinyl alcohol)/cellulose nanocrystal composite nanofibrous mats with enhanced properties through controlling fibers arrangement and microstructure | |
| Song et al. | Mechanical properties of poly (lactic acid)/hemp fiber composites prepared with a novel method | |
| CA3005917C (en) | Modified fiber and preparation method therefor | |
| Erdem et al. | Flame retardancy behaviors and structural properties of polypropylene/nano‐SiO2 composite textile filaments | |
| Zhou et al. | Silkworm-based silk fibers by electrospinning | |
| Hu et al. | Toward environment-friendly composites of poly (propylene carbonate) reinforced with cellulose nanocrystals | |
| CN103147159B (en) | Preparation method of polylactic acid nanofiber | |
| Li et al. | Synergistic effects of PEG and MWCNTs on crystallization behavior of PLLA | |
| CN103061038A (en) | Tourmaline electret polylactic acid melt-blown non-woven cloth and manufacture method | |
| Yin et al. | Simultaneous enhancement of toughness, strength and superhydrophilicity of solvent-free microcrystalline cellulose fluids/poly (lactic acid) fibers fabricated via electrospinning approach | |
| Aouat et al. | Morphological, mechanical, and thermal characterization of poly (lactic acid)/cellulose multifilament fibers prepared by melt spinning | |
| Sheng et al. | Electrospun cellulose nanocrystals/polycaprolactone nanocomposite fiber mats | |
| CN105506776A (en) | Modified polylactic acid fiber and preparation method thereof | |
| CN107299414B (en) | High molecular weight dextrorotation polylactic acid-low molecular weight l-lactic acid blended fiber preparation method and product | |
| CN107366038B (en) | It is crosslinked dextrorotation polylactic acid/l-lactic acid blended fiber preparation method and product | |
| Chen et al. | Stimuli‐responsive polymer nanocomposites based on styrene‐butadiene rubber and bacterial cellulose whiskers | |
| Xiang et al. | Nanocomposite fibers electrospun from poly (lactic acid)/cellulose nanocrystals | |
| Chang et al. | Green preparation of thermochromic starch-based fibers through a wet-spinning process | |
| Zhang et al. | Fabrication and properties of poly (l‐lactide) nanofibers via blend sea‐island melt spinning | |
| Xiong et al. | Poly (ethylene terephthalate)/carbon black composite fibers prepared by electrospinning | |
| Xiao et al. | Silk nanofibrils/chitosan composite fibers with enhanced mechanical properties | |
| CN105255127A (en) | Polylactic acid/polyethylene electric conduction composite material and preparation method thereof | |
| Zhao et al. | Enhanced thermal and antibacterial properties of stereo-complexed polylactide fibers doped with nano-silver | |
| CN107366039B (en) | It is crosslinked l-lactic acid/low molecular weight l-lactic acid blended fiber preparation method and product | |
| CN107299413A (en) | The preparation method and product of a kind of height molecular weight PLLA blended fiber |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |