CN110607083A - Medical plastic particle formula - Google Patents
Medical plastic particle formula Download PDFInfo
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- CN110607083A CN110607083A CN201910975273.0A CN201910975273A CN110607083A CN 110607083 A CN110607083 A CN 110607083A CN 201910975273 A CN201910975273 A CN 201910975273A CN 110607083 A CN110607083 A CN 110607083A
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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
- C08L101/00—Compositions of unspecified macromolecular compounds
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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
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/18—Oxygen-containing compounds, e.g. metal carbonyls
- C08K3/24—Acids; Salts thereof
- C08K3/26—Carbonates; Bicarbonates
- C08K2003/265—Calcium, strontium or barium carbonate
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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
- C08K2201/011—Nanostructured additives
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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
- C08L2201/00—Properties
- C08L2201/06—Biodegradable
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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
- C08L2201/00—Properties
- C08L2201/10—Transparent films; Clear coatings; Transparent materials
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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
- C08L2207/00—Properties characterising the ingredient of the composition
- C08L2207/20—Recycled plastic
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- Chemical & Material Sciences (AREA)
- Health & Medical Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Organic Chemistry (AREA)
- Processing And Handling Of Plastics And Other Materials For Molding In General (AREA)
- Compositions Of Macromolecular Compounds (AREA)
- Biological Depolymerization Polymers (AREA)
Abstract
The invention relates to the technical field of plastics and discloses a medical plastic particle formula which comprises the following components in parts by weight: 60-90 parts of waste PVC particles, 129 parts of resin powder 108-sand, 25-42 parts of modified filler, 6-11 parts of stabilizer, 6-8 parts of lubricant, 25-45 parts of plasticizer, 13-25 parts of coarse whiting, 9-16 parts of nano calcium carbonate and 26-30 parts of biodegradation agent. The medical plastic particle formula can effectively improve the degradation speed of the medical plastic, prevent the medical plastic from polluting the surrounding environment and further improve the environmental protection performance of the medical plastic.
Description
Technical Field
The invention relates to the technical field of plastics, in particular to a medical plastic particle formula.
Background
PVC (polyvinyl chloride) is a thermoplastic resin obtained by polymerizing vinyl chloride under the action of an initiator, and is a homopolymer of vinyl chloride, and a homopolymer of vinyl chloride and a copolymer of vinyl chloride are collectively called a vinyl chloride resin. PVC has better mechanical property, tensile strength is about 60mpa, impact strength is 5-10kj/m2, the dielectric property is excellent, but the stability to light and heat is poor, the PVC can be decomposed to generate hydrogen chloride at more than 100 ℃ or after long-time sunshine exposure, further the hydrogen chloride is automatically catalyzed and decomposed to cause color change, the physical property is also rapidly reduced, a stabilizing agent is required to be added in practical application to improve the stability to heat and light, in the specific application aspect, the PVC products can be divided into hard PVC and soft PVC according to the main properties of the PVC products, in addition, according to market estimation, about 25 percent of medical plastic crystal production is PVC, mainly because the resin has lower cost, wide application range and easy processing, the PVC products for medical application comprise hemodialysis pipelines, breathing masks, oxygen uptake tubes and the like.
Most of the existing medical plastic products are disposable, a large amount of medical plastic products are required to be consumed every day in hospitals, most of the medical plastic products have bacteria, viruses and the like, and therefore the medical plastic products cannot be recycled, but the degradation speed of the existing plastic products is low, the medical plastic products are too many and easily pollute the environment, and the environmental protection performance is poor.
Disclosure of Invention
Technical problem to be solved
Aiming at the defects of the prior art, the invention provides a medical plastic particle formula, which has the advantages of improving the degradation speed of medical plastics, avoiding a large amount of medical plastic products from polluting the surrounding environment, improving the environmental protection performance of the medical plastic products and the like, and solves the problems of low degradation speed, easy pollution to the surrounding environment and poor environmental protection performance of the medical plastic products.
(II) technical scheme
In order to realize the purposes of improving the degradation speed of medical plastic, avoiding a large number of medical plastic products from polluting the surrounding environment and improving the environmental protection performance of the medical plastic products, the invention provides the following technical scheme: the medical plastic particle formula comprises the following components in parts by weight: 60-90 parts of waste PVC particles, 129 parts of resin powder 108-sand, 25-42 parts of modified filler, 6-11 parts of stabilizer, 6-8 parts of lubricant, 25-45 parts of plasticizer, 13-25 parts of coarse whiting, 9-16 parts of nano calcium carbonate and 26-30 parts of biodegradation agent.
Preferably, the feed is prepared from the following raw materials in parts by weight: 83 parts of waste PVC particles, 113 parts of resin powder, 35 parts of modified filler, 10 parts of stabilizer, 7.3 parts of lubricant, 33 parts of plasticizer, 18 parts of heavy calcium carbonate, 12 parts of nano calcium carbonate and 27 parts of biodegradation agent.
Preferably, the lubricant is a fatty acid amide.
Preferably, the plasticizer is a blend of phthalate and dioctyl sebacate in a 2:3 ratio.
Preferably, the stabilizer is a calcium-zinc additive.
Preferably, the modified filler is a methyl methacrylate-butadiene-styrene copolymer.
Preferably, the biodegradation agent is starch.
A preparation method of a medical plastic particle formula comprises the following steps:
crushing and screening large raw materials, screening out large particles, keeping the large particles away, and crushing the large particles again;
step two, mixing 83 parts of waste PVC particles, 113 parts of resin powder, 35 parts of modified filler, 10 parts of stabilizer, 7.3 parts of lubricant, 33 parts of plasticizer, 18 parts of triple superphosphate, 12 parts of nano calcium carbonate and 27 parts of biodegradable in a mixer for 10-15 minutes to ensure that all raw materials are fully mixed, and finally obtaining uniformly mixed materials;
adding the mixed materials into an extruder, and melting the materials into a molten state by using the extruder;
step four, conveying the molten material to a granulator for granulation to obtain plastic granules;
and step five, finally, cleaning and drying the plastic particles to ensure the cleanness of the plastic particles.
(III) advantageous effects
Compared with the prior art, the invention provides a medical plastic particle formula, which has the following beneficial effects:
the medical plastic particle formula is provided with a biodegradation agent, a modified filling agent, a plasticizer and a stabilizer, the tensile property, the bending resistance and the impact resistance of the plastic particles can be improved through the plasticizer, the flexibility, the tensile property and the cold resistance of the plastic particles can be improved by adding more plasticizer, the plastic particles have good toughness and excellent transparency through the modified filler, the light transmittance can reach 80-90%, the thermal deformation temperature is 84 ℃ (1.82MPa), and the plastic particles are oil-resistant, weak acid-resistant and weak base-resistant, a certain amount of starch is mixed into the raw materials through the biological degradation agent, the starch is easily decomposed by microorganisms when the plastic is degraded, the degradation speed of the plastic product is improved, the structure can effectively improve the degradation speed of the medical plastic, avoid the medical plastic from polluting the surrounding environment and further improve the environmental protection performance of the medical plastic.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The medical plastic particle formula comprises the following components in parts by weight: 60-90 parts of waste PVC particles, 129 parts of resin powder 108-sand, 25-42 parts of modified filler, 6-11 parts of stabilizer, 6-8 parts of lubricant, 25-45 parts of plasticizer, 13-25 parts of coarse whiting, 9-16 parts of nano calcium carbonate and 26-30 parts of biodegradation agent;
the coarse whiting is calcite powder, is short for ground calcium carbonate, and is prepared by grinding natural carbonate minerals such as calcite, marble and limestone. The heavy calcium carbonate is a common powdery inorganic filler, has the advantages of high chemical purity, large inertia, difficult chemical reaction, good thermal stability, no decomposition at the temperature of below 400 ℃, high whiteness, low oil absorption rate, low refractive index, soft quality, dryness, no crystal water, low hardness, low abrasion value, no toxicity, no odor, good dispersibility and the like, and in addition, the heavy calcium carbonate can increase the product volume of the plastic particles, reduce the cost, improve the processing performance, improve the dimensional stability, reinforce or semi-reinforce, improve the printing performance, improve the flame retardance, the glossiness and the like of the plastic particles;
in addition, the nano calcium carbonate is also called as superfine calcium carbonate, and can improve the rheological property of the plastic master batch and improve the moldability thereof. The active nano calcium carbonate has oleophylic and hydrophobic surface and good compatibility with resin, can effectively improve or adjust the rigidity, toughness, smoothness and bending strength of a product, improve the processing performance, improve the rheological property, the size stability and the heat resistance stability of the product, has the functions of filling, enhancing and toughening, can replace part of expensive fillers and aids, and reduces the using amount of resin, thereby reducing the production cost of plastic particle products.
The feed is prepared from the following raw materials in parts by weight: 83 parts of waste PVC particles, 113 parts of resin powder, 35 parts of modified filler, 10 parts of stabilizer, 7.3 parts of lubricant, 33 parts of plasticizer, 18 parts of heavy calcium carbonate, 12 parts of nano calcium carbonate and 27 parts of biodegradation agent.
The lubricant is fatty acid amide, can improve the fluidity, and also plays a role of a melting promoter, an anti-blocking and antistatic agent, a slipping agent and the like, has good compatibility with the polymer, and plays a role of reducing the cohesion among polymer molecules in the polymer, thereby improving the internal friction heat of the plastic melt and the fluidity of the melt.
The plasticizer is a mixture of phthalic acid ester and dioctyl sebacate, the mixing ratio of the phthalic acid ester to the dioctyl sebacate is 2:3, wherein the phthalic acid ester is prepared by esterifying phthalic anhydride and alcohol in the presence of an acid catalyst, the dioctyl sebacate is prepared by heating, saponifying and thermally cracking castor oil and then separating, firstly, sebacic acid and octanol are subjected to esterification reaction under the catalysis of sulfuric acid to generate monooctyl ester, the second step of generating diester is performed by controlling higher temperature to be about 135-145 ℃ and dehydrating under the vacuum degree of 0.099MPa for 3-6 h to obtain crude ester, then the crude ester is neutralized by 2-7% of pure alkali aqueous solution, then washed by water at 80-85 ℃, dealcoholized under the vacuum degree of 0.098-0.099 MPa, when the flash point of the crude ester reaches 205 ℃, the end point is obtained, then the crude ester is subjected to pressure filtration to obtain a finished product, and the phthalic acid ester and the dioctyl sebacate are mixed in the ratio of 2:3, and the stirring is carried out by using a stirrer, so that the tensile property, the bending resistance and the impact resistance of the plastic particles can be improved, and the flexibility, the tensile property and the cold resistance of the plastic particles can be improved by adding more plasticizers.
The stabilizer is a calcium-zinc additive, the calcium-zinc stabilizer is synthesized by taking calcium salt, zinc salt, lubricant, antioxidant and the like as main components by adopting a special compounding process, the calcium-zinc stabilizer can replace toxic stabilizers such as lead-cadmium salts, organic tin and the like, and has quite good thermal stability, light stability, transparency and tinting strength, and meanwhile, the plastic particles added with the calcium-zinc stabilizer meet the environmental protection and sanitation requirements of nontoxic plastics.
The modified filler is methyl methacrylate-butadiene-styrene copolymer, the methyl methacrylate-butadiene-styrene copolymer is prepared by emulsion grafting of styrene, methyl methacrylate and styrene-butadiene latex, the methyl methacrylate-butadiene-styrene copolymer has high putting strength, high rigidity, good low temperature property, good toughness at-40 ℃, excellent transparency, light transmittance of 80-90%, oil resistance, weak acid resistance and weak alkali resistance.
The biological degradation agent is starch, the starch is extracted from high-starch plants such as potatoes, taros and the like, firstly, a crusher is arranged to crush the high-starch plants such as the potatoes, the taros and the like, then, the starch contained in the high-starch plants such as the potatoes, the taros and the like is extracted by using aqueous solution, then, the solution is filtered and precipitated, and finally, the moist starch is taken out and dried.
A preparation method of a medical plastic particle formula comprises the following steps:
crushing and screening large raw materials, screening out large particles, keeping the large particles away, and crushing the large particles again;
step two, 83 parts of waste PVC particles, 113 parts of resin powder, 35 parts of modified filler, 10 parts of stabilizer, 7.3 parts of lubricant, 33 parts of plasticizer, 18 parts of triple superphosphate, 12 parts of nano calcium carbonate and 27 parts of biodegradable in the formula are mixed in a mixer for 10-15 minutes to ensure that all raw materials are fully mixed, and finally, uniformly mixed materials are obtained, in addition, the waste PVC particles need to be sterilized at a high temperature of 200 ℃ for 1-2 hours and finally need to be cleaned, so that the cleanness of the PVC particles is ensured, and the influence of the waste PVC particles on the quality of plastic particles is avoided;
adding the mixed materials into an extruder, and melting the materials into a molten state by using the extruder;
step four, conveying the molten material to a granulator for granulation to obtain plastic granules;
and step five, finally, cleaning and drying the plastic particles, so that the cleanness of the plastic particles is guaranteed, and the quality of the plastic particles is improved.
In conclusion, according to the formula of the medical plastic particle, the tensile property, the bending resistance and the impact resistance of the plastic particle can be improved through the plasticizer, the flexibility, the tensile property and the cold resistance of the plastic particle can be improved through adding more plasticizers, the plastic particle has good toughness and excellent transparency through the modified filler, the light transmittance can reach 80% -90%, the thermal deformation temperature is 84 ℃ (1.82MPa), the plastic particle is resistant to oil, weak acid and weak base, a certain amount of starch is mixed into the raw materials through the biodegradation agent, the starch is easily decomposed by microorganisms when the plastic is degraded, the degradation speed of the plastic product is improved, the degradation speed of the medical plastic can be effectively improved through the structure, the medical plastic is prevented from polluting the surrounding environment, and the environmental protection performance of the medical plastic is improved.
It is to be noted that the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (8)
1. The formula of the medical plastic particles is characterized in that: the medical plastic particle formula comprises the following components in parts by weight: 60-90 parts of waste PVC particles, 129 parts of resin powder 108-sand, 25-42 parts of modified filler, 6-11 parts of stabilizer, 6-8 parts of lubricant, 25-45 parts of plasticizer, 13-25 parts of coarse whiting, 9-16 parts of nano calcium carbonate and 26-30 parts of biodegradation agent.
2. The medical plastic particle formulation according to claim 1, wherein: the feed is prepared from the following raw materials in parts by weight: 83 parts of waste PVC particles, 113 parts of resin powder, 35 parts of modified filler, 10 parts of stabilizer, 7.3 parts of lubricant, 33 parts of plasticizer, 18 parts of heavy calcium carbonate, 12 parts of nano calcium carbonate and 27 parts of biodegradation agent.
3. The medical plastic particle formulation according to claim 1, wherein: the lubricant is a fatty acid amide.
4. The medical plastic particle formulation according to claim 1, wherein: the plasticizer is a mixture of phthalate and dioctyl sebacate, and the mixing ratio of the phthalate to the dioctyl sebacate is 2: 3.
5. The medical plastic particle formulation according to claim 1, wherein: the stabilizer is a calcium-zinc additive.
6. The medical plastic particle formulation according to claim 1, wherein: the modified filler is methyl methacrylate-butadiene-styrene copolymer.
7. The medical plastic particle formulation according to claim 1, wherein: the biodegradation agent is starch.
8. A method of preparing a formulation using the medical plastic particles of claim 1, wherein: the method comprises the following steps:
crushing and screening large raw materials, screening out large particles, keeping the large particles away, and crushing the large particles again;
step two, mixing 83 parts of waste PVC particles, 113 parts of resin powder, 35 parts of modified filler, 10 parts of stabilizer, 7.3 parts of lubricant, 33 parts of plasticizer, 18 parts of triple superphosphate, 12 parts of nano calcium carbonate and 27 parts of biodegradable in a mixer for 10-15 minutes to ensure that all raw materials are fully mixed, and finally obtaining uniformly mixed materials;
adding the mixed materials into an extruder, and melting the materials into a molten state by using the extruder;
step four, conveying the molten material to a granulator for granulation to obtain plastic granules;
and step five, finally, cleaning and drying the plastic particles to ensure the cleanness of the plastic particles.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910975273.0A CN110607083A (en) | 2019-10-14 | 2019-10-14 | Medical plastic particle formula |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910975273.0A CN110607083A (en) | 2019-10-14 | 2019-10-14 | Medical plastic particle formula |
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| CN110607083A true CN110607083A (en) | 2019-12-24 |
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| CN201910975273.0A Withdrawn CN110607083A (en) | 2019-10-14 | 2019-10-14 | Medical plastic particle formula |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112143111A (en) * | 2020-10-16 | 2020-12-29 | 泗县东方塑料有限责任公司 | Dental medical plastic product processing technology |
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2019
- 2019-10-14 CN CN201910975273.0A patent/CN110607083A/en not_active Withdrawn
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112143111A (en) * | 2020-10-16 | 2020-12-29 | 泗县东方塑料有限责任公司 | Dental medical plastic product processing technology |
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Application publication date: 20191224 |
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