CN111803713A - Woven film, woven bag and weaving method - Google Patents
Woven film, woven bag and weaving method Download PDFInfo
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- CN111803713A CN111803713A CN202010473646.7A CN202010473646A CN111803713A CN 111803713 A CN111803713 A CN 111803713A CN 202010473646 A CN202010473646 A CN 202010473646A CN 111803713 A CN111803713 A CN 111803713A
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- 238000009941 weaving Methods 0.000 title claims abstract description 27
- 238000000034 method Methods 0.000 title claims description 13
- 239000010410 layer Substances 0.000 claims abstract description 104
- 239000000463 material Substances 0.000 claims abstract description 61
- 239000012528 membrane Substances 0.000 claims abstract description 54
- 230000015556 catabolic process Effects 0.000 claims abstract description 43
- 238000006731 degradation reaction Methods 0.000 claims abstract description 43
- 239000012792 core layer Substances 0.000 claims abstract description 17
- 230000000694 effects Effects 0.000 claims abstract description 16
- 239000002861 polymer material Substances 0.000 claims abstract description 8
- 238000002156 mixing Methods 0.000 claims abstract description 6
- 230000002040 relaxant effect Effects 0.000 claims abstract description 3
- 229920000139 polyethylene terephthalate Polymers 0.000 claims description 32
- 239000005020 polyethylene terephthalate Substances 0.000 claims description 32
- JVTAAEKCZFNVCJ-REOHCLBHSA-N L-lactic acid Chemical compound C[C@H](O)C(O)=O JVTAAEKCZFNVCJ-REOHCLBHSA-N 0.000 claims description 16
- 229920001432 poly(L-lactide) Polymers 0.000 claims description 16
- 229920001606 poly(lactic acid-co-glycolic acid) Polymers 0.000 claims description 15
- 238000010041 electrostatic spinning Methods 0.000 claims description 8
- 238000005516 engineering process Methods 0.000 claims description 8
- 238000007789 sealing Methods 0.000 claims description 8
- 238000001035 drying Methods 0.000 claims description 7
- 238000007493 shaping process Methods 0.000 claims description 7
- 238000010438 heat treatment Methods 0.000 claims description 6
- 238000009940 knitting Methods 0.000 claims description 4
- 239000000203 mixture Substances 0.000 claims description 3
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- 210000000988 bone and bone Anatomy 0.000 abstract description 21
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61L—METHODS OR APPARATUS FOR STERILISING MATERIALS OR OBJECTS IN GENERAL; DISINFECTION, STERILISATION OR DEODORISATION OF AIR; CHEMICAL ASPECTS OF BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES; MATERIALS FOR BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES
- A61L27/00—Materials for grafts or prostheses or for coating grafts or prostheses
- A61L27/50—Materials characterised by their function or physical properties, e.g. injectable or lubricating compositions, shape-memory materials, surface modified materials
- A61L27/56—Porous materials, e.g. foams or sponges
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61L—METHODS OR APPARATUS FOR STERILISING MATERIALS OR OBJECTS IN GENERAL; DISINFECTION, STERILISATION OR DEODORISATION OF AIR; CHEMICAL ASPECTS OF BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES; MATERIALS FOR BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES
- A61L27/00—Materials for grafts or prostheses or for coating grafts or prostheses
- A61L27/14—Macromolecular materials
- A61L27/18—Macromolecular materials obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61L—METHODS OR APPARATUS FOR STERILISING MATERIALS OR OBJECTS IN GENERAL; DISINFECTION, STERILISATION OR DEODORISATION OF AIR; CHEMICAL ASPECTS OF BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES; MATERIALS FOR BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES
- A61L27/00—Materials for grafts or prostheses or for coating grafts or prostheses
- A61L27/50—Materials characterised by their function or physical properties, e.g. injectable or lubricating compositions, shape-memory materials, surface modified materials
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61L—METHODS OR APPARATUS FOR STERILISING MATERIALS OR OBJECTS IN GENERAL; DISINFECTION, STERILISATION OR DEODORISATION OF AIR; CHEMICAL ASPECTS OF BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES; MATERIALS FOR BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES
- A61L27/00—Materials for grafts or prostheses or for coating grafts or prostheses
- A61L27/50—Materials characterised by their function or physical properties, e.g. injectable or lubricating compositions, shape-memory materials, surface modified materials
- A61L27/58—Materials at least partially resorbable by the body
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- D—TEXTILES; PAPER
- D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
- D04H—MAKING TEXTILE FABRICS, e.g. FROM FIBRES OR FILAMENTARY MATERIAL; FABRICS MADE BY SUCH PROCESSES OR APPARATUS, e.g. FELTS, NON-WOVEN FABRICS; COTTON-WOOL; WADDING ; NON-WOVEN FABRICS FROM STAPLE FIBRES, FILAMENTS OR YARNS, BONDED WITH AT LEAST ONE WEB-LIKE MATERIAL DURING THEIR CONSOLIDATION
- D04H1/00—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres
- D04H1/70—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres characterised by the method of forming fleeces or layers, e.g. reorientation of fibres
- D04H1/72—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres characterised by the method of forming fleeces or layers, e.g. reorientation of fibres the fibres being randomly arranged
- D04H1/728—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres characterised by the method of forming fleeces or layers, e.g. reorientation of fibres the fibres being randomly arranged by electro-spinning
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- D—TEXTILES; PAPER
- D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
- D04H—MAKING TEXTILE FABRICS, e.g. FROM FIBRES OR FILAMENTARY MATERIAL; FABRICS MADE BY SUCH PROCESSES OR APPARATUS, e.g. FELTS, NON-WOVEN FABRICS; COTTON-WOOL; WADDING ; NON-WOVEN FABRICS FROM STAPLE FIBRES, FILAMENTS OR YARNS, BONDED WITH AT LEAST ONE WEB-LIKE MATERIAL DURING THEIR CONSOLIDATION
- D04H1/00—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres
- D04H1/70—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres characterised by the method of forming fleeces or layers, e.g. reorientation of fibres
- D04H1/76—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres characterised by the method of forming fleeces or layers, e.g. reorientation of fibres otherwise than in a plane, e.g. in a tubular way
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61L—METHODS OR APPARATUS FOR STERILISING MATERIALS OR OBJECTS IN GENERAL; DISINFECTION, STERILISATION OR DEODORISATION OF AIR; CHEMICAL ASPECTS OF BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES; MATERIALS FOR BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES
- A61L2430/00—Materials or treatment for tissue regeneration
- A61L2430/02—Materials or treatment for tissue regeneration for reconstruction of bones; weight-bearing implants
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Abstract
The invention solves the problems that the internal fixation of the fracture only plays a role of fixation and can not provide space for the growth of bone tissues in time, thereby achieving the aim of guiding and efficiently promoting the healing of the fracture, and provides a woven film, a woven bag and a preparation method; a woven membrane, comprising: the core layer is made of a non-degradable high polymer material, the middle layer and the outer layer are respectively made of a degradable material and the non-degradable high polymer material through mixing and weaving, and the degradation time of the degradable material used in the middle layer is more than or equal to that of the degradable material used in the outer layer; the braided bag uses both ends open-ended cylinder braided film, includes: first port, second port, first port will the one end opening of braided membrane is sealed fixed, the second port will the other end opening of braided membrane has the effect of relaxing when sealed fixed.
Description
Technical Field
The invention relates to the technical field of medical instruments, in particular to a woven film, a woven bag and a weaving method.
Background
The fracture condition caused by car accidents and osteoporosis is very common, in the aspect of fracture treatment, a steel nail steel plate is generally implanted as a support in the traditional operation, the steel nail steel plate needs to be implanted after being operated, the trauma is large, the risk is high, and in addition, the stress shielding phenomenon caused by the difference of the elastic modulus between a metal material and a human bone is very large. The minimally invasive surgery is greatly popular in recent years because of small surgical trauma, the application in fracture treatment is to fold a woven bag and convey the woven bag to an affected part, the prior art is woven by PET materials, but the minimally invasive surgery has the problems of narrow treatment range, uncertain clinical long-term effect and higher risk.
Aiming at the problems, because bone tissues can continue to grow and heal after fracture, the woven bag is still prone to supporting and fixing effects at present, the inventor thinks that a device is developed to continuously vacate space for the growth of new bone tissues besides the basic fixing effect, therefore, the inventor proposes to design devices which degrade at different times by referring to the healing mechanism of fracture, so that the bone tissues can grow and the fracture can heal better.
Disclosure of Invention
The invention solves the problem that a fracture internal fixture only plays a role in fixing and cannot provide space for bone tissue growth in time to achieve the aim of guiding and efficiently promoting fracture healing, provides a woven membrane, tests degradable materials and non-degradable materials with different proportions and the layer number thereof, determines a three-layer woven membrane, has a supporting effect and different degradation time, further prepares the woven membrane into a woven bag which can be directly used by matching with a conveying sheath tube, and also defines a preparation method of the woven membrane and the woven bag.
According to an aspect of the present invention, there is provided a woven film, comprising: the core layer is made of a non-degradable high polymer material, the middle layer and the outer layer are respectively made of a degradable material and the non-degradable high polymer material through mixing and weaving, and the degradation time of the degradable material used in the middle layer is more than or equal to that of the degradable material used in the outer layer.
Further, the weight proportion of the degradable material of the middle layer is 40-70%, and the weight proportion of the degradable material of the outer layer is 40-60%.
Further, the degradation time of the degradable material of the middle layer is kept between 3 and 6 months, and the degradation time of the degradable material of the outer layer is kept between 6 and 12 months.
Further, the degradable material comprises one or more of the following: PLGA, PLLA, said non-degradable material comprising one or more of: PET and PBT.
According to a second aspect of the present invention, there is provided a woven film, wherein there are three layers, the core layer is made of PET material, the middle layer is made of PLLA and 40% PET material by weight, and the outer layer is made of PLGA and 50% PET material by weight.
According to a third aspect of the present invention, there is provided a woven bag characterized by comprising the woven film of claim 1 or 2 or 3 or 5, which is a cylindrical woven film open at both ends, comprising: first port, second port, first port will the one end opening of braided membrane is sealed fixed, the second port will the other end opening of braided membrane has the effect of relaxing when sealed fixed.
Further, the shape of the woven bag comprises: circular and oval.
Further, the braided bag cooperates and carries the sheath pipe to use, carry the sheath pipe with the second port link to each other
According to a fourth aspect of the present invention, there is provided a method of knitting a knitted film, comprising:
s102, weaving a core layer from the non-degradable material by using an electrostatic spinning technology, and weaving a mixture of the degradable material and the non-degradable material into an intermediate layer and an outer layer;
and S104, putting the woven membrane into a drying oven, setting the temperature to be 50 ℃, keeping the temperature for not less than 30 minutes, and then heating to 70 ℃ for shaping to obtain the woven membrane.
According to a fifth aspect of the present invention, there is provided a knitting method of a woven bag, characterized by comprising:
s106, sequentially weaving the outer layer, the middle layer and the core layer by using a 3D electrostatic spinning technology to form a cylindrical structure, wherein the three layers of films are tightly connected together;
s108, placing the braided cylindrical membrane into a drying oven, setting the temperature to be 50 ℃, keeping the temperature for not less than 30 minutes, and then heating to 70 ℃ for shaping;
and S110, fixing the sealing ring at one end of the cylinder to open, and fixing the other sealing ring with threads at the other end of the cylinder to open to obtain the woven bag.
The core layer of the woven film and the woven bag is the non-degradable layer, the middle layer is the slow degradation layer, and the outer layer is the fast degradation layer, so that the invention has the following advantages:
(1) the degradation time of the rapid degradation layer is 3-6 months, the rapid degradation layer still has a skeleton formed by non-degradable substances after degradation, the fixation effect is not influenced, in addition, a space is left for the continuous growth of bone tissues, after the degradation of the rapid degradation layer is finished, the slow degradation layer starts to slowly degrade, the degradation time of the slow degradation layer is 6-12 months, the slow degradation layer can not degrade within 6 months, the slow degradation layer still has the same fixation effect as the non-degradable layer, the degradation is continuous, and the bone tissues continuously grow;
(2) the fast degradation layer and the slow degradation layer are still left with undegraded skeletons as porous structures after degradation, the porous structures can prevent stress disorder and can guide the growth of bone tissues at the same time while playing a role in fixation, healing is accelerated, for example, a honeycomb structure formed after the fast degradation layer is degraded can well induce the growth of new bones, the second layer has the same effect, the second layer is degraded to the last part which is not degraded, and the porosity is more suitable for bone growth;
(3) the degradable material is selected from PLGA and PLLA, the PLGA is a polylactic-co-glycolic acid copolymer, and is formed by randomly polymerizing two monomers, namely lactic acid and glycolic acid, and the degradable material has good biocompatibility and safety, the degradation product of the PLGA is the lactic acid and the glycolic acid and is a byproduct of human metabolic pathway, and when the degradable material is applied to medicines and biological materials, the degradable material has no toxic or side effect; the woven material PLLA of the second layer also has good biocompatibility, the metabolite lactic acid can be metabolized and discharged out of the body, and the degradation rate of the PLLA can be controlled by controlling the molecular weight of the PLLA.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the provided drawings without creative efforts.
FIG. 1 schematic representation of example 1 knitted membrane;
FIG. 2 is a schematic view of a woven bag in embodiment 4;
FIG. 3 is a schematic diagram of the use of the woven bag in cooperation with the conveying sheath in embodiment 5.
Detailed Description
In order to more clearly illustrate embodiments of the present invention or technical solutions of the prior art, embodiments of the present invention will be described below with reference to the accompanying drawings. It is obvious that the drawings in the following description are only some examples of the invention, and that for a person skilled in the art, other drawings and embodiments can be obtained from them without inventive effort.
The embodiment of the invention provides a woven membrane, which is characterized by comprising the following components: the core layer is made of a non-degradable high polymer material, the middle layer and the outer layer are respectively made of a degradable material and the non-degradable high polymer material through mixing and weaving, and the degradation time of the degradable material used in the middle layer is more than or equal to that of the degradable material used in the outer layer.
The existing woven membrane is formed by electrospinning non-degradable PET materials, the biggest problem is that the membrane is always kept in bones and occupies the space for bone growth, and if the membrane is made to be degradable, the membrane loses the supporting effect along with the degradation of the materials. Therefore, the inventor proposes that a multi-layer woven structure can be designed according to the bone healing time, the fast degradation layer can well match early bone tissue to grow fast, the slow degradation layer can match deep bone healing, and the one layer is not degradable to provide the most basic fixing and supporting effect. Most importantly, the rapid degradation layer and the slow degradation layer are woven by mixing degradable materials and non-degradable materials, the degradation time of the rapid degradation layer and the slow degradation layer can be adjusted by adjusting the molecular weight of the degradable materials, the rapid degradation layer is guaranteed to be preferentially degraded, the slow degradation layer is degraded again, a skeleton formed by the non-degradable materials can be left after degradation, the shape of the skeleton is cellular, the fixed support effect is achieved, meanwhile, the growth of bone tissues can be guided, and the healing of bones is accelerated.
The inventor believes that all the practice of balancing the fixation and the provision of the bone tissue growth space according to the healing time can achieve the balance target through the blending of the degradable material and the non-degradable material and the layers with different degradation speeds, and obtain the good effect of promoting the bone healing. For a specific mode thereof, reference may be made to example 1.
Example 1:
the braided film is divided into three layers, wherein the degradable material in the middle layer can select one or the combination of PLGA or PLLA, the weight percentage is 40-70%, the degradable material in the outer layer can select one or the combination of PLGA or PLLA within 3-6 months of degradation time, the weight percentage is 40-60%, the degradation time is 6-12 months, and the non-degradable material in the core layer, the middle layer and the outer layer can select PET or PBT or the combination thereof.
FIG. 1 is a schematic view of a woven membrane of example 1.
Grouping experiments:
control group: a PET woven film;
experiment group 1 core layer-PET woven membrane; the middle layer is a 40% PLLA + 60% PET blended braided membrane; the outer layer is a blended braided membrane of 50% PLGA and 50% PET;
experiment group 2 core layer-PET woven membrane; the middle layer is a blended braided membrane of 60% PLGA and 40% PET; the outer layer is a blended braided membrane of 50% PLLA and 50% PET;
experiment group 3 core layer-PET woven membrane; the middle layer is a blended braided membrane of 70% PLGA and 30% PET; the outer layer is a blended braided membrane of 50% PLLA and 50% PET;
experiment group 5 core layer-PET woven membrane; the middle layer is a blended braided membrane of 60% PLGA and 40% PET; the outer layer is a blended braided membrane of 40% PLLA + 60% PET;
experiment group 5 core layer-PET woven membrane; the middle layer is a blended braided membrane of 60% PLGA and 40% PET; the outer layer is a blended braided film of 60% PLLA + 40% PET.
Table 1 example 1 degradation time, compressive strength table
As can be seen from the data in the table, even after the outer layer and the middle layer are degraded, the outer layer and the middle layer still have good compressive strength, and at least can meet the requirement of internal fixation of non-load-bearing bones, wherein the effect of the experimental group 2 is the best.
Example 2:
the woven membrane is characterized by comprising three layers, wherein a core layer is made of PET (polyethylene terephthalate) material, a middle layer is made of 60% PLLA and 40% PET material in a mixed weaving mode, and an outer layer is made of 50% PLGA and 50% PET material in a mixed weaving mode.
The effect data are consistent with those of experimental group 2 of example 1.
Example 3:
the woven bag was produced by using the woven film of example 2, and the woven film was formed into a cylindrical woven film having both ends opened by a 3D electrospinning technique. Contains two ports: first port, second port, first port will weave the one end opening sealing of membrane fixed, and the second port has the lax effect when will weaving the other end opening sealing of membrane fixed.
3D classic spinning technique can realize becoming three-dimensional cylindrical structure with the membrane, and the both ends of cylinder are tightened up fixedly and sealed by two ports respectively to ensure that if can not the weeping when filling bone cement, the second port is the passageway of braided bag and outside intercommunication except that sealed effect, and its lax effect can make its device with carrying the braided bag break away from more easily.
Of course, the woven bag of the embodiment 3 has a preferable shape and a combined use method of the auxiliary device, which is specifically as follows:
example 4:
the woven bag of example 3 is formed in a circular or oval shape.
This shape allows for better contraction and expansion and easier access to the interior of the bone.
Fig. 2 is an illustration of the present embodiment.
Example 5:
embodiment 3 or embodiment 4's braided bag has increased a transport sheath pipe, carries the sheath pipe to link to each other with the second port, can carry the inside of bone with the mode of wicresoft with the braided bag, and the release that the function of relaxation that the second port has simultaneously can be fine carries the sheath to accomplish fracture internal fixation's operation.
Fig. 3 is an illustration of the present embodiment.
The woven film and woven bag is obtained by weaving, and the weaving method comprises the following steps:
example 6:
a method of knitting a knitted membrane, comprising:
s102, weaving a core layer from the non-degradable material by using an electrostatic spinning technology, and weaving a mixture of the degradable material and the non-degradable material into an intermediate layer and an outer layer;
and S104, putting the woven membrane into a drying oven, setting the temperature to be 50 ℃, keeping the temperature for not less than 30 minutes, and then heating to 70 ℃ for shaping to obtain the woven membrane.
The braided membrane is formed by braiding through a two-dimensional electrostatic spinning technology, a core layer, an intermediate layer and an outer layer can be braided in sequence, the important point is treatment after the braiding is finished, and the inventor finds that the braided membrane is slowly dried at 50 ℃ for not less than half an hour through repeated tests, and then rapidly heated to 70 ℃ for shaping, so that the shape of the braided membrane is the best.
Example 7:
the weaving method of the woven bag comprises the following steps:
s106, sequentially weaving the outer layer, the middle layer and the core layer by using a 3D electrostatic spinning technology to form a cylindrical structure, wherein the three layers of films are tightly connected together;
s108, placing the braided cylindrical membrane into a drying oven, setting the temperature to be 50 ℃, keeping the temperature for not less than 30 minutes, and then heating to 70 ℃ for shaping;
s110, fixing a sealing ring at one end of the cylinder to open, fixing another sealing ring with threads at the other end of the cylinder to open to obtain a woven bag
The woven bag is woven through a three-dimensional electrostatic spinning technology, the core layer, the middle layer and the outer layer can be woven in sequence, a cylindrical three-layer structure is formed after weaving is completed, importantly, treatment after weaving is completed, an inventor finds that 50-degree slow drying is not less than half an hour through repeated tests, then the temperature is rapidly increased to 70-degree setting, the obtained woven film is best in shape, after setting, the two ends of the cylinder are closed and fixed, and threads matched with the conveying device need to be reserved at one end of the cylindrical woven film.
The above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.
Claims (10)
1. A woven membrane, comprising: the core layer is made of a non-degradable high polymer material, the middle layer and the outer layer are respectively made of a degradable material and the non-degradable high polymer material through mixing and weaving, and the degradation time of the degradable material used in the middle layer is more than or equal to that of the degradable material used in the outer layer.
2. The woven membrane of claim 1, wherein the weight percentage of the degradable material of the middle layer is 40% -70%, and the weight percentage of the degradable material of the outer layer is 40% -60%.
3. The woven membrane of claim 2, wherein the degradation time of the degradable material of the middle layer is maintained between 3 and 6 months and the degradation time of the degradable material of the outer layer is maintained between 6 and 12 months.
4. The woven membrane of any one of claims 1-3, wherein the degradable material comprises one or more of: PLGA, PLLA, said non-degradable material comprising one or more of: PET and PBT.
5. The woven membrane is characterized by comprising three layers, wherein a core layer is made of PET (polyethylene terephthalate) material, a middle layer is made of 60% PLLA and 40% PET material in a mixed weaving mode, and an outer layer is made of 50% PLGA and 50% PET material in a mixed weaving mode.
6. A woven bag comprising the woven film of claim 1 or 2 or 3 or 5, which is a cylindrical woven film open at both ends, comprising: first port, second port, first port will the one end opening of braided membrane is sealed fixed, the second port will the other end opening of braided membrane has the effect of relaxing when sealed fixed.
7. The woven bag according to claim 6, wherein the shape of the woven bag comprises: circular and oval.
8. The woven bag according to claim 6 or 7, wherein said woven bag is used in combination with a transport sheath, said transport sheath being connected to said second port.
9. A method for knitting a knitted film, comprising:
s102, weaving a core layer from the non-degradable material by using an electrostatic spinning technology, and weaving a mixture of the degradable material and the non-degradable material into an intermediate layer and an outer layer;
and S104, putting the woven membrane into a drying oven, setting the temperature to be 50 ℃, keeping the temperature for not less than 30 minutes, and then heating to 70 ℃ for shaping to obtain the woven membrane.
10. A weaving method of a woven bag is characterized by comprising the following steps:
s106, sequentially weaving the outer layer, the middle layer and the core layer by using a 3D electrostatic spinning technology to form a cylindrical structure, wherein the three layers of films are tightly connected together;
s108, placing the braided cylindrical membrane into a drying oven, setting the temperature to be 50 ℃, keeping the temperature for not less than 30 minutes, and then heating to 70 ℃ for shaping;
and S110, fixing the sealing ring at one end of the cylinder to open, and fixing the other sealing ring with threads at the other end of the cylinder to open to obtain the woven bag.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113529273A (en) * | 2021-07-15 | 2021-10-22 | 北京天助畅运医疗技术股份有限公司 | Fiber membrane and preparation method and application thereof |
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Application publication date: 20201023 |