CN104140594A - Toughened regenerated modified granule manufactured through polyolefin of waste medical plastic transfusion container - Google Patents
Toughened regenerated modified granule manufactured through polyolefin of waste medical plastic transfusion container Download PDFInfo
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- CN104140594A CN104140594A CN201410369912.6A CN201410369912A CN104140594A CN 104140594 A CN104140594 A CN 104140594A CN 201410369912 A CN201410369912 A CN 201410369912A CN 104140594 A CN104140594 A CN 104140594A
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L23/00—Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers
- C08L23/02—Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers not modified by chemical after-treatment
- C08L23/10—Homopolymers or copolymers of propene
- C08L23/12—Polypropene
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K2201/00—Specific properties of additives
- C08K2201/002—Physical properties
- C08K2201/003—Additives being defined by their diameter
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2205/00—Polymer mixtures characterised by other features
- C08L2205/02—Polymer mixtures characterised by other features containing two or more polymers of the same C08L -group
- C08L2205/025—Polymer mixtures characterised by other features containing two or more polymers of the same C08L -group containing two or more polymers of the same hierarchy C08L, and differing only in parameters such as density, comonomer content, molecular weight, structure
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2205/00—Polymer mixtures characterised by other features
- C08L2205/03—Polymer mixtures characterised by other features containing three or more polymers in a blend
- C08L2205/035—Polymer mixtures characterised by other features containing three or more polymers in a blend containing four or more polymers in a blend
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2205/00—Polymer mixtures characterised by other features
- C08L2205/08—Polymer mixtures characterised by other features containing additives to improve the compatibility between two polymers
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2205/00—Polymer mixtures characterised by other features
- C08L2205/24—Crystallisation aids
- C08L2205/242—Beta spherulite nucleating agents
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2207/00—Properties characterising the ingredient of the composition
- C08L2207/20—Recycled plastic
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Abstract
The invention discloses a toughened regenerated modified material manufactured through polyolefin materials of a waste medical plastic transfusion container and a manufacturing method and purpose of the toughened regenerated modified material. The toughened regenerated modified material is good in tenacity, easy to process, low in cost and suitable for manufacturing cold-resistant and shock-resisting materials.
Description
Technical field
The invention belongs to waste material recycling field, particularly relate to the resource reutilization field of medical waste plastic, specifically, the present invention relates to, by the toughness reinforcing regenerating and modifying pellet of preparing from discarded medical plastic infusion vessel polypropylene material, the invention still further relates to Preparation Method And The Use.
Background technology
At present, a large amount of Phthalates that use in Medical transfusion container product, the usage quantity of disposable plastic infusion vessel (comprising disposable Plastic Bottle and plastic soft bag) and disposable plastic injector is very huge., it uses in bringing convenience, and has also produced a large amount of wastes, and the need of production of these plastics resource that consumes petroleum in a large number.If only these discarded medical plastic infusion vessels are carried out to landfill, burning disposal, not only waste resource but also meeting serious environment pollution.Thereby, strengthen recovery and the recycle of waste plastic, not only can reduce pollution, protection of the environment, and can economize on resources, significant.
Polypropylene (PP) is one of three large general-purpose plastics, and therefore widespread use in infusion vessel occupies larger proportion in discarded medical plastic container.
The main deficiency of regeneration PP material property is that its resistance to impact shock is lower, thus how to improve the toughness after the discarded plastic reclaimed utilization of PP, thus it is very necessary to improve its resistance to impact shock.At present few to improving the study on the modification of discarded PP reworked material performance, particularly the modification of medical plastic container PP material does not almost have.
In general, there are the elastomerics of adding and mineral filler calcium carbonate (CaCO for the conventional method of toughening modifying
3) etc.In addition, induce PP to generate the beta crystal crystallization with excellent toughness by beta crystal-type nucleater, can improve resistance to impact shock, and then improve the performance after discarded PP regeneration.
But in the prior art, for toughness reinforcing and need to add a large amount of elastomericss, because it is expensive, so production cost is higher.In addition, the isoparametric selection of the granularity of pearl filler also can produce a very large impact material modified performance.
So how people attempt finding in performances such as not obvious reduction tensile strengths and do not increase under the prerequisite of cost, improve to large extent the shock strength of discarding PP matrix material always.The present invention is comprehensive adopts multiple toughening modifying technology to carry out toughening modifying to discarded medical plastic infusion vessel, has realized this purpose.
Summary of the invention
The object of the present invention is to provide a kind of toughness reinforcing regenerating and modifying pellet by preparing from the polypropylene material of discarded medical plastic infusion vessel.
For achieving the above object, the present invention adopts following technical scheme:
A toughening modifying pellet of being prepared by discarded medical plastic infusion vessel polypropylene, has following composition:
In the polyolefin tenacity-increased modification pellet of above-mentioned discarded medical plastic infusion vessel, optionally add acrylic resin virgin material 0-10 part, its melting index is about 2-5g/10min (230 DEG C/2.16kg), is preferably 2.8g/min (230 DEG C/2.16kg).
In the polyolefin tenacity-increased modification pellet of above-mentioned discarded medical plastic infusion vessel, the melting index of described POE (POE) is 0.5-2.0g/10min (190 DEG C/2.16kg), is preferably 0.6-0.8g/10min (190 DEG C/2.16kg).POE plays toughness reinforcing effect.
In the polyolefin tenacity-increased modification pellet of above-mentioned discarded medical plastic infusion vessel, described macromole compatilizer is maleic anhydride grafted ethene octene copolymer (POE-g-MAH) or maleic anhydride inoculated polypropylene (PP-g-MAH), wherein the percentage of grafting of POE-g-MAH is 0.6-1.0%, be preferably 0.7-0.8%, melting index is 0.5-3g/10min (190 DEG C/5kg), is preferably 1～2g/min (190 DEG C/5kg); The percentage of grafting of PP-g-MAH is 0.8-1.3%, is preferably 1.1%; Melting index is 80-150g/10min (190 DEG C/2.16kg), is preferably 110g/10min (190 DEG C/2.16kg).Adding of macromole compatilizer, can improve Miscibility.
In the polyolefin tenacity-increased modification pellet of above-mentioned discarded medical plastic infusion vessel, described nucleator is for example WBG-2 type beta crystal rare earth nucleator (purchased from the bright woods in the Guangdong material Science and Technology Co., Ltd. that takes in the fresh).
In the polyolefin tenacity-increased modification pellet of above-mentioned discarded medical plastic infusion vessel, described calcium carbonate is activated Calcium carbonate, particle diameter is 80 nanometer-5 micron (purchased from Fujian Province Sannong Calcium Carbonate Co., Ltd.), and it adds object to be mainly raising toughness, to reduce costs.
In the polyolefin tenacity-increased modification pellet of above-mentioned discarded medical plastic infusion vessel, the effect of described stearate super fatting agent, can improve processing characteristics.It is for example calcium stearate, Magnesium Stearate, Zinic stearas, cadmium stearate, for example, can be calcium stearate (purchased from orient chemical company limited of Gaomi City).
Described antioxidant is by the Hinered phenols antioxidant as primary antioxidant (also referred to as oxidation inhibitor 1), for example four [β-(3, 5-di-tert-butyl-hydroxy phenyl) propionic acid] pentaerythritol ester (antioxidant 1010, like that purchased from ladder is uncommon (Shanghai) changes into industrial development company limited) and as the phosphite ester kind antioxidant (also referred to as oxidation inhibitor 2) of auxiliary anti-oxidant, for example three [2.4-di-tert-butyl-phenyl] phosphorous acid ester (irgasfos 168, like that purchased from ladder is uncommon (Shanghai) changes into industrial development company limited) with 1: 2-1: 3 composite the forming of ratio, there is good synergistic effect.
The tensile strength scope that toughening modifying pellet of the present invention has is 22-36MPa, resistance to impact shock scope 8-53kJ/m2, and elongation at break is all greater than 800%.
The method that the present invention also aims to the toughness reinforcing regenerating and modifying pellet that the discarded polypropylene for medical article plastic container for infusion of preparation is provided, comprises the steps:
(1) will discard medical plastic infusion vessel polypropylene material, acrylic resin virgin material, POE, activated Calcium carbonate, stearate, POE grafts, beta crystal rare earth nucleator WBG-2, primary antioxidant and auxiliary anti-oxidant etc. and be placed in mixing machine, the rotating speed of mixing machine is 20-80rpm, high-speed mixing 3-10min.
(2) (1) step neutralise mixt is added in twin screw extruder with extrusion temperature 180-230 DEG C, screw speed 60-180rpm, rate of feeding 10-60rpm, carries out melting mixing and extrudes injection moulding, cutting granulation.
Pellet of the present invention optionally can further carry out anneal.
The invention further relates to the purposes of toughening modifying pellet of the present invention.That toughening modifying pellet of the present invention can be used for preparing is low temperature resistant, resistance to impact shock requires high product, for example, for the preparation of middle-grade nerf bar.
Beneficial effect of the present invention is embodied in: taking the polypropylene material from discarded medical plastic infusion vessel as body material, add POE and plasticized modifier activated Calcium carbonate with low cost, beta crystal rare earth nucleator, add adjuvant component and carry out modification, do not affecting other materials performance and do not increasing under the prerequisite of cost, improve to large extent the shock strength of discarded PP matrix material, the discarded medical plastic infusion vessel polyolefine regenerating and modifying material good toughness preparing, be easy to processing, be suitable for low temperature resistant, the preparation of shock-resistant product, realize well the resource utilization recycling of medical plastic infusion vessel waste.
In the present invention, unless stated otherwise, all umbers are weight part.The various property-modifying additives that use all can be buied by commodity.The discarded medical plastic infusion vessel polypropylene using in the present invention, from Beijing Municipal Health Bureau by the disposable infusion bag waste of putting in order and carrying out sterilization and disinfection each hospital Unified Set, pulverize and obtain preliminary pure plastic grain thing with pulverizer, its source can ensure and not exist the problem of hygienic safety aspect.
Embodiment
Further describe the present invention below in conjunction with embodiment.
Embodiment 1
(1) by discarded 75 weight parts medical plastic infusion vessel polypropylene material, 15 parts by weight of ethylene octene copolymers (ENGAGE8150 Tao Shi plastics), 10 weight part activated Calcium carbonates (5 microns of particle diameters), 0.1 weight part calcium stearate (purchased from orient chemical company limited of Gaomi City), 3 weight part POE-g-MAH (CMG5805, the rising molecule novel material Science and Technology Ltd. of Nantong day), 0.1 weight part antioxidant 1010 (liking that purchased from ladder is uncommon (Shanghai) changes into industrial development company limited) and 0.2 weight part irgasfos 168 (liking that purchased from ladder is uncommon (Shanghai) changes into industrial development company limited) etc. are placed in mixing machine, the rotating speed of mixing machine is 30rpm, high-speed mixing 3min,
(2) mixture in step (1) is added in twin screw extruder with extrusion temperature 180-230 DEG C, screw speed 180rpm, rate of feeding 40rpm, carries out melting mixing and extrudes injection moulding, cutting granulation.
Standard test specimen batten is placed after processing through exceeding 24 hours environment, tensile strength according to GB/T 1040-92 plastic tensile method for testing performance with the draw speed test gained pellet of 50mm/min, according to the notched Izod impact strength of GB/T 1843-1996 plastics izodtest method test gained pellet, breach type A, surveys 5 samples and gets its mean value as test result for every group.
Recording tensile strength is 30MPa, and socle girder notched Izod impact strength is 42kJ/m
2, elongation at break exceedes 800%.
Embodiment 2
(1) by discarded 70 weight parts medical plastic infusion vessel polypropylene material, 10 parts by weight of ethylene octene copolymers (ENGAGE8150 Tao Shi plastics), 20 weight part activated Calcium carbonates (5 microns of particle diameters), 0.2 weight part calcium stearate (purchased from orient chemical company limited of Gaomi City), 3 weight part POE-g-MAH (CMG5805, the rising molecule novel material Science and Technology Ltd. of Nantong day), 0.1 weight part antioxidant 1010 (liking that purchased from ladder is uncommon (Shanghai) changes into industrial development company limited) and 0.2 weight part irgasfos 168 (liking that purchased from ladder is uncommon (Shanghai) changes into industrial development company limited) etc. are placed in mixing machine, the rotating speed of mixing machine is 30rpm, high-speed mixing 3min.
(2) (1) step neutralise mixt is added in twin screw extruder with extrusion temperature 180-230 DEG C, screw speed 180rpm, rate of feeding 40rpm, carries out melting mixing and extrudes injection moulding, cutting granulation.
The tensile strength of measuring method mensuration gained modifying material is 30MPa as described in Example 1, and room temperature notched Izod impact strength is 15kJ/m
2, elongation at break exceedes 800%.
Embodiment 3
(1) by discarded 70 weight parts medical plastic infusion vessel polypropylene material, 10 parts by weight of ethylene octene copolymers (ENGAGE8150 Tao Shi plastics), the activated Calcium carbonate of 20 5 microns of weight part particle diameters, 0.2 weight part calcium stearate (purchased from orient chemical company limited of Gaomi City), 3 weight part POE-g-MAH (CMG5805, the rising molecule novel material Science and Technology Ltd. of Nantong day), 0.1 weight part beta crystal rare earth nucleator WBG-2 (purchased from Guangdong Wei Linna Materials Co., Ltd), 0.1 weight part antioxidant 1010 (liking that purchased from ladder is uncommon (Shanghai) changes into industrial development company limited) and 0.2 weight part irgasfos 168 (liking that purchased from ladder is uncommon (Shanghai) changes into industrial development company limited) etc. are placed in mixing machine, the rotating speed of mixing machine is 30rpm, high-speed mixing 3min.
(2) mixture in (1) step is added in twin screw extruder with extrusion temperature 180-230 DEG C, screw speed 180rpm, rate of feeding 40rpm, carries out melting mixing and extrudes injection moulding, cutting granulation.The tensile strength of gained modifying material is 30MPa, and room temperature notched Izod impact strength is 15kJ/m
2, elongation at break exceedes 800%.
(3) the granulation material in (2) step is annealed 15 minutes at 125 DEG C.
The room temperature notched Izod impact strength of measuring method mensuration gained pellet is 41kJ/m as described in Example 1
2, elongation at break exceedes 800%.
Embodiment 4
(1) by the waste and old medical plastic infusion bag polypropylene of 82 weight part material, 8 parts by weight of ethylene octene copolymers (ENGAGE 8150 Tao Shi plastics), the active nano-calcium carbonate of 10 weight part particle diameter 80 nanometer-100 nanometers, 0.1 weight part stearate, 3 weight part POE-g-MAH (CMG5805, the rising molecule novel material Science and Technology Ltd. of Nantong day), 0.1 weight part oxidation inhibitor 1 (liking that purchased from ladder is uncommon (Shanghai) changes into industrial development company limited) and 0.2 weight part oxidation inhibitor 2 (liking that purchased from ladder is uncommon (Shanghai) changes into industrial development company limited) etc. are placed in mixing machine, the rotating speed of mixing machine is 30rpm, high-speed mixing 3min.
(2) mixture in (1) step is added in twin screw extruder with extrusion temperature 180-230 DEG C, screw speed 180rpm, rate of feeding 40rpm, carries out melting mixing and extrudes injection moulding, cutting granulation.
The tensile strength of measuring method mensuration gained pellet is 35MPa as described in Example 1, and room temperature notched Izod impact strength is 40kJ/m
2, elongation at break exceedes 800%.
Embodiment 5
(1) by discarded 82 weight parts medical plastic infusion vessel polypropylene material, 8 parts by weight of ethylene octene copolymers (ENGAGE8150 Tao Shi plastics), particle diameter 80 nanometer-100 nm-class active calcium carbonates of 10 weight parts, 0.1 weight part stearate, 3 weight part POE-g-MAH (CMG5805, the rising molecule novel material Science and Technology Ltd. of Nantong day), 0.075 weight part beta crystal rare earth nucleator WBG-2 (purchased from Guangdong Wei Linna Materials Co., Ltd), 0.15 weight part antioxidant 1010 (liking that purchased from ladder is uncommon (Shanghai) changes into industrial development company limited) and 0.3 weight part irgasfos 168 (liking that purchased from ladder is uncommon (Shanghai) changes into industrial development company limited) etc. are placed in mixing machine, the rotating speed of mixing machine is 30rpm, high-speed mixing 3min.
(2) mixture in (1) step is added in twin screw extruder with extrusion temperature 180-230 DEG C, screw speed 180rpm, rate of feeding 40rpm, carries out melting mixing and extrudes injection moulding, cutting granulation.The tensile strength of gained modifying material is 34MPa, and room temperature notched Izod impact strength is 40kJ/m2, and elongation at break exceedes 800%.
(3) the granulation material in (2) step is annealed 10 minutes at 125 DEG C.
The room temperature notched Izod impact strength of measuring method mensuration gained pellet is 51kJ/m as described in Example 1
2, elongation at break exceedes 800%.
As can be seen from the above-described embodiment, modification pellet of the present invention all can obtain good notched Izod impact strength.
Claims (10)
1. a toughening modifying pellet of being prepared by discarded medical plastic infusion vessel polypropylene, has following composition:
2. toughening modifying pellet according to claim 1, it is characterized in that: the melting index of described POE is 0.5-2.0g/10min under 190 DEG C/2.16kg, and the melting index of described acrylic resin virgin material is 2-5g/10min (230 DEG C/2.16kg).
3. toughening modifying pellet according to claim 1, it is characterized in that: described macromole compatilizer is maleic anhydride grafted ethene octene copolymer or maleic anhydride inoculated polypropylene, wherein the percentage of grafting of maleic anhydride grafted ethene octene copolymer is 0.6-1.0%, and melting index is 0.5-3g/10min under 190 DEG C/5kg; The percentage of grafting of maleic anhydride inoculated polypropylene is 0.8-1.3%, and melting index is 80-150g/10min under 190 DEG C/2.16kg.
4. toughening modifying pellet according to claim 1, is characterized in that: described calcium carbonate is activated Calcium carbonate particle, and its particle diameter is 80 nanometer-5 micron.
5. toughening modifying pellet according to claim 1, is characterized in that: described nucleator is WBG-2 type rare earth nucleator.
6. toughening modifying pellet according to claim 1, is characterized in that: described stearate is calcium stearate, Magnesium Stearate, Zinic stearas or cadmium stearate.
7. according to claim 1 toughening modifying pellet, it is characterized in that: described antioxidant by four [β-(3,5-di-tert-butyl-hydroxy phenyl) propionic acid] pentaerythritol ester primary antioxidant and three [2.4-di-tert-butyl-phenyl] phosphorous acid ester auxiliary anti-oxidant with 1: 2-1: 3 composite forming.
8. toughening modifying pellet according to claim 1, is characterized in that: the tensile strength scope that described toughening modifying pellet has is 22-36MPa, resistance to impact shock scope 8-53kJ/m
2, elongation at break is greater than 800%.
9. according to the preparation method of the toughening modifying pellet described in aforementioned claim any one, comprise the steps:
(1) will discard medical plastic infusion vessel polypropylene material, acrylic resin virgin material, calcium carbonate, stearate, maleic anhydride grafted ethene octene copolymer (POE-g-MAH), beta crystal rare earth nucleator WBG-2, antioxidant 1010 and irgasfos 168 etc. and be placed in mixing machine, the rotating speed of mixing machine is 30-90rpm, high-speed mixing 3-10min.
(2) (1) step neutralise mixt is added in twin screw extruder with extrusion temperature 180-230 DEG C, screw speed 60-240rpm, rate of feeding 20-80rpm, carries out melting mixing and extrudes injection moulding, cutting granulation.
(3) optionally by the pellet annealing of step (2) gained.
According to the toughening modifying pellet described in aforementioned claim 1-8 any one in the purposes of preparing in bumper.
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| CN201410369912.6A CN104140594A (en) | 2014-07-31 | 2014-07-31 | Toughened regenerated modified granule manufactured through polyolefin of waste medical plastic transfusion container |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104774391A (en) * | 2015-04-27 | 2015-07-15 | 风帆股份有限公司 | Waste polypropylene regenerated toughening-modified composition and preparation method thereof |
| CN104961969A (en) * | 2015-06-30 | 2015-10-07 | 苏州乔纳森新材料科技有限公司 | Method for preparing polypropylene material for medical bronchial catheter |
| CN111454499A (en) * | 2020-04-10 | 2020-07-28 | 山东交通学院 | Geomembrane prepared by recycling medical waste and preparation method and application thereof |
| CN115895108A (en) * | 2022-11-01 | 2023-04-04 | 上海睿聚环保科技有限公司 | Waste PP recycled plastic for high-transparency injection molding product |
| CN116234872A (en) * | 2020-10-28 | 2023-06-06 | 巴塞尔聚烯烃意大利有限公司 | Polyolefin compositions obtained from recycled polyolefin |
| CN116376161A (en) * | 2023-04-12 | 2023-07-04 | 湖南映宏新材料股份有限公司 | Medical infusion bag modified recycling material and preparation method thereof |
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| CN1282755A (en) * | 1999-07-29 | 2001-02-07 | 上海杰事杰新材料股份有限公司 | Ultra-high-toughness high-strength polypropylene composition and its preparing process |
| CN101914241A (en) * | 2010-08-04 | 2010-12-15 | 孙卫东 | Formula of special material for cases of electrocars and motorcycles |
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2014
- 2014-07-31 CN CN201410369912.6A patent/CN104140594A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1282755A (en) * | 1999-07-29 | 2001-02-07 | 上海杰事杰新材料股份有限公司 | Ultra-high-toughness high-strength polypropylene composition and its preparing process |
| CN101914241A (en) * | 2010-08-04 | 2010-12-15 | 孙卫东 | Formula of special material for cases of electrocars and motorcycles |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104774391A (en) * | 2015-04-27 | 2015-07-15 | 风帆股份有限公司 | Waste polypropylene regenerated toughening-modified composition and preparation method thereof |
| CN104774391B (en) * | 2015-04-27 | 2017-03-15 | 风帆有限责任公司 | A kind of waste and old polypropylene regeneration toughening modifying composition and preparation method thereof |
| CN104961969A (en) * | 2015-06-30 | 2015-10-07 | 苏州乔纳森新材料科技有限公司 | Method for preparing polypropylene material for medical bronchial catheter |
| CN111454499A (en) * | 2020-04-10 | 2020-07-28 | 山东交通学院 | Geomembrane prepared by recycling medical waste and preparation method and application thereof |
| CN116234872A (en) * | 2020-10-28 | 2023-06-06 | 巴塞尔聚烯烃意大利有限公司 | Polyolefin compositions obtained from recycled polyolefin |
| CN115895108A (en) * | 2022-11-01 | 2023-04-04 | 上海睿聚环保科技有限公司 | Waste PP recycled plastic for high-transparency injection molding product |
| CN115895108B (en) * | 2022-11-01 | 2024-04-19 | 上海睿聚环保科技有限公司 | Waste PP regenerated plastic for high-transparency injection molding product |
| CN116376161A (en) * | 2023-04-12 | 2023-07-04 | 湖南映宏新材料股份有限公司 | Medical infusion bag modified recycling material and preparation method thereof |
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Application publication date: 20141112 |