CN105419168A - Medical environmental protection PVC modified material and preparation method therefor - Google Patents
Medical environmental protection PVC modified material and preparation method therefor Download PDFInfo
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- CN105419168A CN105419168A CN201511015849.7A CN201511015849A CN105419168A CN 105419168 A CN105419168 A CN 105419168A CN 201511015849 A CN201511015849 A CN 201511015849A CN 105419168 A CN105419168 A CN 105419168A
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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
- C08L27/00—Compositions of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a halogen; Compositions of derivatives of such polymers
- C08L27/02—Compositions of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a halogen; Compositions of derivatives of such polymers not modified by chemical after-treatment
- C08L27/04—Compositions of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a halogen; Compositions of derivatives of such polymers not modified by chemical after-treatment containing chlorine atoms
- C08L27/06—Homopolymers or copolymers of vinyl chloride
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
- B29C48/25—Component parts, details or accessories; Auxiliary operations
- B29C48/92—Measuring, controlling or regulating
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C2948/00—Indexing scheme relating to extrusion moulding
- B29C2948/92—Measuring, controlling or regulating
- B29C2948/92504—Controlled parameter
- B29C2948/92704—Temperature
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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
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K2201/00—Specific properties of additives
- C08K2201/014—Additives containing two or more different additives of the same subgroup in C08K
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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
- C08L2201/02—Flame or fire retardant/resistant
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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
- C08L2201/08—Stabilised against heat, light or radiation or oxydation
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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
Abstract
The invention relates to the PVC material technology field, and concretely relates to a medical environmental protection PVC modified material and a preparation method therefor. The modified material comprises the following raw materials, by weight, 80-120 parts of PVC resin, 60-80 parts of plasticizer, 10-20 parts of filler, 3-7 parts of heat stabilizer and 0.4-0.8 part of lubricant. The modified material employs the above raw materials, the weight ratios of the raw materials are controlled strictly, various performances of the prepared modified materials exceed the national standards, and the provided modified material is advantaged by environmental protection, excellent temperature resistance and weather resistance, high intensity, excellent shock resistance, good flame retardation effect, excellent processing property and excellent comprehensive properties.
Description
Technical field
The present invention relates to PVC material technical field, it is material modified and preparation method thereof to be specifically related to a kind of medical environment-friendly PVC.
Background technology
The advantages such as polyvinyl chloride (PVC) is one of industrialization the earliest, broad-spectrum general-purpose thermoplastic plastic, and it has, and quality is light, intensity is high, insulation, fire-retardant, corrosion-resistant, high comprehensive performance, cheap and raw material sources are extensive; But also there is following shortcoming: 1, poor toughness, very easily embrittlement when being hit, therefore can not be used as structured material, in addition, the fragility temperature influence of polyvinyl chloride is very large, and general PVC product uses lower limit to be-15 DEG C, and the use lower limit of flexible PVC is-30 DEG C; 2, poor heat stability, it just starts to decomposite HCl 100 DEG C time, more rapid higher than decomposing when 150 DEG C, and the melt temperature of PVC is about 210 DEG C; 3, the viscosity of PVC is high, mobility extreme difference, limits it to a certain extent and uses.People often adopt methods such as adding filler, elastomerics, softening agent, thermo-stabilizer, processing aid, heat-proof modifier and flow ability modifying agent to improve the performance of PVC.
Application number is 201110306510.8 proprietary materials disclosing a kind of PVC, be made up of the following component according to weight part: polyvinyl chloride resin 100 parts, nitrile rubber/nano-calcium carbonate composite powder rubber 4 ~ 16 parts, chlorinatedpolyethylene 2.5 ~ 7 parts, thermo-stabilizer 0.4 ~ 6 part, lubricant 1.1 ~ 3.5 parts and tinting material 0.3 ~ 3.8 part.
Application number is 201110427270.7 disclose a kind of antistatic PVC granule material and preparation method thereof, be prepared from by the raw material of following weight proportioning: PVCSG ~ 390 ~ 100 part, plasticizer DOP 70 ~ 85 parts, one package stabilizer 4 ~ 5.5 parts, stearate 1 ~ 3 part, weighting agent 35 ~ 48 parts, initiator DCP 0.2 ~ 0.5 part, reactive monomer TAIC3 ~ 5 part, 4 ~ 6 parts, oxyethane, ethylene oxide 1 ~ 3 part.
The environmental protection rank of above-mentioned existing PVC material can't be used for medical field, therefore, researches and develops a kind of medical environment-friendly PVC material and seems particularly important.
Summary of the invention
In order to overcome the shortcoming and defect existed in prior art, the object of the present invention is to provide a kind of medical environment-friendly PVC material modified, this material modified environmental protection, and resistance to gentle weather resistance is excellent, intensity is high, excellent shock resistance, good flame retardation effect, processing characteristics is excellent, excellent combination property.
Another object of the present invention is to the preparation method providing a kind of medical environment-friendly PVC material modified, this preparation method's technique is simple, and convenient operation and control, steady quality, production efficiency is high, and production cost is low, can large-scale industrial production.
Object of the present invention is achieved through the following technical solutions: a kind of medical environment-friendly PVC is material modified, the material modified raw material comprising following weight part of described medical environment-friendly PVC:
Polyvinyl chloride resin 80-120 part
Softening agent 60-80 part
Weighting agent 10-20 part
Thermo-stabilizer 3-7 part
Lubricant 0.4-0.8 part.
Medical environment-friendly PVC of the present invention is material modified by adopting above-mentioned raw materials, and the strict weight proportion controlling each raw material, the material modified properties of obtained medical environment-friendly PVC is all beyond national standard, environmental protection, and resistance to gentle weather resistance is excellent, intensity is high, excellent shock resistance, good flame retardation effect, processing characteristics is excellent, excellent combination property.
Preferably, the mixture that is made up of with weight ratio 2-4:1 calcium carbide process PVC resin and ethylene process polyvinyl chloride resin of described polyvinyl chloride resin.
The present invention is by adopting calcium carbide process PVC resin and ethylene process polyvinyl chloride resin as the composite use of polyvinyl chloride resin, and to control its weight ratio be 2-4:1, makes plasticize speed fast, easily processes.
Preferably, described softening agent is the mixture be made up of with weight ratio 15-18:1 hexanaphthene 1,2-dioctyl phthalate diisononyl esters and epoxy soybean oil.
The present invention adopts 1,2-dioctyl phthalate diisononyl esters and epoxy soybean oil are as the composite use of softening agent, and to control its weight ratio be 15-18:1, two all softening agent are environment-friendly plasticizer, the reactive force between PVC molecular chain can be reduced, the fusing point of the second-order transition temperature of PVC plastic, yield temperature and contained crystallite is all reduced, improves the plasticity-of resin, make goods softness, resistance to low temperature good.
Preferably, the mixture that is made up of with weight ratio 1-2:0.8-1.2:1 water-ground limestone, light calcium carbonate and kaolin of described weighting agent.
The present invention is by adopting water-ground limestone, light calcium carbonate and kaolin as the composite use of weighting agent, and to control its weight ratio be 1-2:0.8-1.2:1, good with the consistency of polyvinyl chloride resin, thus improves intensity and the shock resistance of material.
Preferably, the mixture that is made up of with weight ratio 0.8-1.2:1 Ca-Zn composite heat stabilizer and hydrotalcite thermal stabilizer of described thermo-stabilizer.
Ca-Zn composite heat stabilizer not only can replace the poisonous stablizers such as plumbous cadmium salt class and organic tin, and has goodish thermostability, light stability and the transparency and tinting strength.Facts have proved, in polyvinyl chloride resin goods, good processability, heat stabilization is equivalent to lead salt stabilizer, is a kind of good non-toxic stabilizer.
Hydrotalcite stablizer has high thermal stability: distinctive sour absorption mechanism, result in its thermostability of thermostability higher than lead base; High transparent: have identical specific refractory power with PVC; High-insulativity: by anion exchange reaction, absorbed muriate can not discharge, and insulativity is splendid; High security: hydrotalcite can be applicable in the food pack of polymer materials; Good weathering resistance (environmental compatibility is strong), can not produce sulfide staining: can with various thermo-stabilizer with the use of.
The present invention is by adopting Ca-Zn composite heat stabilizer and hydrotalcite thermal stabilizer as the composite use of thermo-stabilizer, and to control its weight ratio be 0.8-1.2:1, can make material in the course of processing, have good dispersiveness, consistency and processing fluidity, make material good heat stability, there is efficient weathering resistance.
The mixture that described Ca-Zn composite heat stabilizer is made up of with weight ratio 0.5-1.5:1:0.5-1.5:0.8-1.2 calcium stearate, ricinolic acid calcium, Zinic stearas and zinc ricinate.
The present invention is by adopting calcium stearate, ricinolic acid calcium, Zinic stearas and zinc ricinate as Ca-Zn composite heat stabilizer, and to control its weight ratio be 0.5-1.5:1:0.5-1.5:0.8-1.2, there is goodish thermostability, light stability and the transparency and tinting strength, and good processability.
Preferably, the mixture that is made up of with weight ratio 1.5-2.5:0.8-1.2:1 oxidized polyethlene wax, pentaerythritol stearate and ethylene bis stearic acid amide of described lubricant.
The present invention adopts oxidized polyethlene wax as external lubricant, can reduce the friction of PVC melt and mould, machine barrel; Adopt pentaerythritol stearate and ethylene bis stearic acid amide as internal lubricant, the intermolecular friction of PVC melt can be reduced; Three kinds of lubricants can make material in the course of processing, improve the mobility of material and the release property of goods with the composite use of weight ratio 1.5-2.5:0.8-1.2:1.
Preferably, described medical environment-friendly PVC is material modified also comprises impact modifier 5-10 part, and described impact modifier is the mixture that the chlorinatedpolyethylene of 25%-45% and the ethylene-vinyl acetate copolymer of vinyl acetate between to for plastic unit content 5%-25% form with weight ratio 1.5-2.5:1 by chlorinity.
Chlorinatedpolyethylene (CPE) is a kind of properties-correcting agent of thermoplastics, has good over-all properties.Appropriate CPE is added, the processing characteristics that can reduce the melt viscosity of resin, improve mobility, improve plastics in polyvinyl chloride (PVC) resin; The work-ing life of the shock strength of PVC, resistance to low temperature, weathering performance, prolongation goods can also be improved.CPE also contributes to the dispersed of calcium carbonate and polyvinyl chloride resin; And when the chlorinity (weight content) of chlorinatedpolyethylene is for 25%-45%, make the resistance to impact shock of material best.
Ethylene-vinyl acetate copolymer (EVA) can be used as the impact modifying agent of PVC, has good flexibility, obdurability, lower temperature resistance (-58 DEG C still have pliability), weathering resistance, stress cracking resistance, heat sealer, agglutinating value(of coal), the transparency and glossiness; Also there is the elasticity as rubber simultaneously, excellent chemical stability, thermostability (heat decomposition temperature 229 ~ 230 DEG C), ozone resistance, nontoxicity, good processibility and dyeability; Fine with the miscibility of filler, even if fill more filler, also unlikelyly have a strong impact on its physical and mechanical property.
EVA is as the impact modifying agent of PVC, its effect is different with the content of vinyl acetate between to for plastic in multipolymer, when the content of vinyl acetate between to for plastic is low, with the poor compatibility of PVC, reinforced effects is poor, and goods are opaque, along with the increase of vinyl acetate between to for plastic unit content, the consistency of multipolymer and PVC improves, and reinforced effects improves, and the goods transparency is also better; But the content of vinyl acetate between to for plastic also can not be too high, during vinyl acetate between to for plastic unit content 5%-25%, obviously can improve the shock strength of PVC, compared with the impact modifying agent containing carbon-carbon double bond, also there is the good advantage of ageing resistance.
The present invention is by adopting chlorinatedpolyethylene and ethylene-vinyl acetate copolymer as the composite use of impact modifier, and to control its weight ratio be 1.5-2.5:1, the high temperature resistant of material and resistance to low temperature can be improved, the processing characteristics that can also reduce the melt viscosity of material, improve mobility, improve plastics, improves the work-ing life of the shock strength of material, weathering performance, prolongation goods.
Preferably, described medical environment-friendly PVC is material modified also comprises fire retardant 1-5 part, the mixture that described fire retardant is made up of with weight ratio 0.5-1.5:1 antimonous oxide and zinc borate.
The present invention is by adopting antimonous oxide and zinc borate as the composite use of fire retardant, and to control its weight ratio be 0.5-1.5:1, material can be made to reach good flame retardant effect, can also improve Drawing abillity and mechanical property.
Described medical environment-friendly PVC material modified slipping agent 0.05-0.15 part and pigment powder 0.01-0.05 part; Described slipping agent is the mixture be made up of with weight ratio 1.5-2.5:0.8-1.2:1 erucicamide, amine hydroxybenzene and N, N'-ethylene bis stearamide.
The present invention is by adopting erucicamide, amine hydroxybenzene and N, N'-ethylene bis stearamide is as slipping agent and to control its weight ratio be 1.5-2.5:0.8-1.2:1, mechanical resistant stirring capacity and fingerprinting stress can be strengthened, finished product good forming effect, any surface finish, the extensibility of finished product can also be strengthened, easy-to-draw not easily broken.
Described pigment powder is particle diameter at the titanium dioxide of 1-5 μm; The mixture that described titanium dioxide is made up of with weight ratio 1:1.5-2.5 Rutile type Titanium Dioxide and anatase thpe white powder.
The present invention adopts particle diameter at the titanium dioxide of 1-5 μm as pigment powder, further employing Rutile type Titanium Dioxide and the composite use of anatase thpe white powder, and to control its weight ratio be 1:1.5-2.5, there is superior whiteness, tinting strength, opacifying power, weathering resistance, thermotolerance and chemical stability, particularly there is no toxicity.
Another object of the present invention is achieved through the following technical solutions: the preparation method that a kind of medical environment-friendly PVC is material modified, comprises the steps:
(1) take above-mentioned raw materials mixing by weight ratio, put into high speed blender, at 100-140 DEG C of temperature, stir 15-25min;
(2) raw material after stirring is passed through twin screw extruder extruding pelletization, obtained medical environment-friendly PVC is material modified.
Preparation method's technique of the present invention is simple, and convenient operation and control, steady quality, production efficiency is high, and production cost is low, can large-scale industrial production.
Preferably, in described step (2), the extruder temperature of twin screw extruder is: a district temperature 138-160 DEG C, two district temperature 135-160 DEG C, three district temperature 135-155 DEG C, four district temperature 132-150 DEG CHe five district temperature 130-148 DEG C.
Beneficial effect of the present invention is: the material modified properties of medical environment-friendly PVC of the present invention all beyond national standard, environmental protection, and resistance to gentle weather resistance is excellent, intensity is high, excellent shock resistance, good flame retardation effect, processing characteristics is excellent, excellent combination property.Medical environment-friendly PVC of the present invention is material modified meets the International Environmental Protection standards such as REACH, ROHS, PAHS, N-P, can be widely used in the fields such as medical treatment.
Preparation method's technique of the present invention is simple, and convenient operation and control, steady quality, production efficiency is high, and production cost is low, can large-scale industrial production.
Embodiment
For the ease of the understanding of those skilled in the art, below in conjunction with embodiment, the present invention is further illustrated, and the content that embodiment is mentioned not is limitation of the invention.
Embodiment 1
A kind of medical environment-friendly PVC is material modified, the material modified raw material comprising following weight part of described medical environment-friendly PVC:
Polyvinyl chloride resin 80 parts
60 parts, softening agent
Weighting agent 10 parts
Thermo-stabilizer 3 parts
Lubricant 0.4 part.
The mixture that described polyvinyl chloride resin is made up of with weight ratio 2:1 calcium carbide process PVC resin and ethylene process polyvinyl chloride resin.
Described softening agent is the mixture be made up of with weight ratio 15:1 hexanaphthene 1,2-dioctyl phthalate diisononyl esters and epoxy soybean oil.
The mixture that described weighting agent is made up of with weight ratio 1:0.8:1 water-ground limestone, light calcium carbonate and kaolin.
The mixture that described thermo-stabilizer is made up of with weight ratio 0.8:1 Ca-Zn composite heat stabilizer and hydrotalcite thermal stabilizer; The mixture that described Ca-Zn composite heat stabilizer is made up of with weight ratio 0.5:1:0.5:0.8 calcium stearate, ricinolic acid calcium, Zinic stearas and zinc ricinate.
The mixture that described lubricant is made up of with weight ratio 1.5:0.8:1 oxidized polyethlene wax, pentaerythritol stearate and ethylene bis stearic acid amide.
Described medical environment-friendly PVC is material modified also comprises impact modifier 5 parts, and described impact modifier is the mixture that the chlorinatedpolyethylene of 25% and the ethylene-vinyl acetate copolymer of vinyl acetate between to for plastic unit content 5% form with weight ratio 1.5:1 by chlorinity.
Described medical environment-friendly PVC is material modified also comprises fire retardant 1 part, the mixture that described fire retardant is made up of with weight ratio 0.5:1 antimonous oxide and zinc borate.
Described medical environment-friendly PVC is material modified also comprises slipping agent 0.05 part and 0.01 part, pigment powder; Described slipping agent is the mixture be made up of with weight ratio 1.5:0.8:1 erucicamide, amine hydroxybenzene and N, N'-ethylene bis stearamide; Described pigment powder is particle diameter at the titanium dioxide of 1 μm; The mixture that described titanium dioxide is made up of with weight ratio 1:1.5 Rutile type Titanium Dioxide and anatase thpe white powder.
The preparation method that medical environment-friendly PVC is material modified, comprises the steps:
(1) take above-mentioned raw materials mixing by weight ratio, put into high speed blender, at 100 DEG C of temperature, stir 25min;
(2) raw material after stirring is passed through twin screw extruder extruding pelletization, obtained medical environment-friendly PVC is material modified.
In described step (2), the extruder temperature of twin screw extruder is: district's temperature 138 DEG C, two district's temperature 135 DEG C, three district's temperature 135 DEG C, four district's temperature 132 DEG CHe five district temperature 130 DEG C.
Embodiment 2
A kind of medical environment-friendly PVC is material modified, the material modified raw material comprising following weight part of described medical environment-friendly PVC:
Polyvinyl chloride resin 90 parts
65 parts, softening agent
Weighting agent 12 parts
Thermo-stabilizer 4 parts
Lubricant 0.5 part.
The mixture that described polyvinyl chloride resin is made up of with weight ratio 2.5:1 calcium carbide process PVC resin and ethylene process polyvinyl chloride resin.
Described softening agent is the mixture be made up of with weight ratio 16:1 hexanaphthene 1,2-dioctyl phthalate diisononyl esters and epoxy soybean oil.
The mixture that described weighting agent is made up of with weight ratio 1.2:0.9:1 water-ground limestone, light calcium carbonate and kaolin.
The mixture that described thermo-stabilizer is made up of with weight ratio 0.9:1 Ca-Zn composite heat stabilizer and hydrotalcite thermal stabilizer; The mixture that described Ca-Zn composite heat stabilizer is made up of with weight ratio 0.8:1:0.8:0.9 calcium stearate, ricinolic acid calcium, Zinic stearas and zinc ricinate.
The mixture that described lubricant is made up of with weight ratio 1.8:0.9:1 oxidized polyethlene wax, pentaerythritol stearate and ethylene bis stearic acid amide.
Described medical environment-friendly PVC is material modified also comprises impact modifier 6 parts, and described impact modifier is the mixture that the chlorinatedpolyethylene of 30% and the ethylene-vinyl acetate copolymer of vinyl acetate between to for plastic unit content 10% form with weight ratio 1.8:1 by chlorinity.
Described medical environment-friendly PVC is material modified also comprises fire retardant 2 parts, the mixture that described fire retardant is made up of with weight ratio 0.8:1 antimonous oxide and zinc borate.
Described medical environment-friendly PVC is material modified also comprises slipping agent 0.08 part and 0.02 part, pigment powder; Described slipping agent is the mixture be made up of with weight ratio 1.8:0.9:1 erucicamide, amine hydroxybenzene and N, N'-ethylene bis stearamide; Described pigment powder is particle diameter at the titanium dioxide of 2 μm; The mixture that described titanium dioxide is made up of with weight ratio 1:1.8 Rutile type Titanium Dioxide and anatase thpe white powder.
The preparation method that medical environment-friendly PVC is material modified, comprises the steps:
(1) take above-mentioned raw materials mixing by weight ratio, put into high speed blender, at 110 DEG C of temperature, stir 22min;
(2) raw material after stirring is passed through twin screw extruder extruding pelletization, obtained medical environment-friendly PVC is material modified.
In described step (2), the extruder temperature of twin screw extruder is: district's temperature 140 DEG C, two district's temperature 140 DEG C, three district's temperature 135 DEG C, four district's temperature 135 DEG CHe five district temperature 135 DEG C.
Embodiment 3
A kind of medical environment-friendly PVC is material modified, the material modified raw material comprising following weight part of described medical environment-friendly PVC:
Polyvinyl chloride resin 100 parts
70 parts, softening agent
Weighting agent 15 parts
Thermo-stabilizer 5 parts
Lubricant 0.6 part.
The mixture that described polyvinyl chloride resin is made up of with weight ratio 3:1 calcium carbide process PVC resin and ethylene process polyvinyl chloride resin.
Described softening agent is the mixture be made up of with weight ratio 16.5:1 hexanaphthene 1,2-dioctyl phthalate diisononyl esters and epoxy soybean oil.
The mixture that described weighting agent is made up of with weight ratio 1.5:1:1 water-ground limestone, light calcium carbonate and kaolin.
The mixture that described thermo-stabilizer is made up of with weight ratio 1:1 Ca-Zn composite heat stabilizer and hydrotalcite thermal stabilizer; The mixture that described Ca-Zn composite heat stabilizer is made up of with weight ratio 1:1:1:1 calcium stearate, ricinolic acid calcium, Zinic stearas and zinc ricinate.
Described lubricant by oxidized polyethlene wax, pentaerythritol stearate and ethylene bis stearic acid amide with weight ratio: the mixture that 2:1:1 forms.
Described medical environment-friendly PVC is material modified also comprises impact modifier 8 parts, and described impact modifier is the mixture that the chlorinatedpolyethylene of 35% and the ethylene-vinyl acetate copolymer of vinyl acetate between to for plastic unit content 15% form with weight ratio 2:1 by chlorinity.
Described medical environment-friendly PVC is material modified also comprises fire retardant 3 parts, the mixture that described fire retardant is made up of with weight ratio 1:1 antimonous oxide and zinc borate.
Described medical environment-friendly PVC is material modified also comprises slipping agent 0.1 part and 0.03 part, pigment powder; Described slipping agent is the mixture be made up of with weight ratio 2:1:1 erucicamide, amine hydroxybenzene and N, N'-ethylene bis stearamide; Described pigment powder is particle diameter at the titanium dioxide of 3 μm; The mixture that described titanium dioxide is made up of with weight ratio 1:2 Rutile type Titanium Dioxide and anatase thpe white powder.
The preparation method that medical environment-friendly PVC is material modified, comprises the steps:
(1) take above-mentioned raw materials mixing by weight ratio, put into high speed blender, at 120 DEG C of temperature, stir 20min;
(2) raw material after stirring is passed through twin screw extruder extruding pelletization, obtained medical environment-friendly PVC is material modified.
In described step (2), the extruder temperature of twin screw extruder is: district's temperature 160 DEG C, two district's temperature 160 DEG C, three district's temperature 155 DEG C, four district's temperature 150 DEG CHe five district temperature 148 DEG C.
Embodiment 4
A kind of medical environment-friendly PVC is material modified, the material modified raw material comprising following weight part of described medical environment-friendly PVC:
Polyvinyl chloride resin 110 parts
75 parts, softening agent
Weighting agent 18 parts
Thermo-stabilizer 6 parts
Lubricant 0.7 part.
The mixture that described polyvinyl chloride resin is made up of with weight ratio 3.5:1 calcium carbide process PVC resin and ethylene process polyvinyl chloride resin.
Described softening agent is the mixture be made up of with weight ratio 17:1 hexanaphthene 1,2-dioctyl phthalate diisononyl esters and epoxy soybean oil.
The mixture that described weighting agent is made up of with weight ratio 1.8:1.1:1 water-ground limestone, light calcium carbonate and kaolin.
The mixture that described thermo-stabilizer is made up of with weight ratio 1.1:1 Ca-Zn composite heat stabilizer and hydrotalcite thermal stabilizer; The mixture that described Ca-Zn composite heat stabilizer is made up of with weight ratio 1.2:1:1.2:1.1 calcium stearate, ricinolic acid calcium, Zinic stearas and zinc ricinate.
The mixture that described lubricant is made up of with weight ratio 2.2:1.1:1 oxidized polyethlene wax, pentaerythritol stearate and ethylene bis stearic acid amide.
Described medical environment-friendly PVC is material modified also comprises impact modifier 9 parts, and described impact modifier is the mixture that the chlorinatedpolyethylene of 40% and the ethylene-vinyl acetate copolymer of vinyl acetate between to for plastic unit content 20% form with weight ratio 2.2:1 by chlorinity.
Described medical environment-friendly PVC is material modified also comprises fire retardant 4 parts, the mixture that described fire retardant is made up of with weight ratio 1.2:1 antimonous oxide and zinc borate.
Described medical environment-friendly PVC is material modified also comprises slipping agent 0.12 part and 0.04 part, pigment powder; Described slipping agent is the mixture be made up of with weight ratio 2.2:1.1:1 erucicamide, amine hydroxybenzene and N, N'-ethylene bis stearamide; Described pigment powder is particle diameter at the titanium dioxide of 4 μm; The mixture that described titanium dioxide is made up of with weight ratio 1:2.2 Rutile type Titanium Dioxide and anatase thpe white powder.
The preparation method that medical environment-friendly PVC is material modified, comprises the steps:
(1) take above-mentioned raw materials mixing by weight ratio, put into high speed blender, at 130 DEG C of temperature, stir 18min;
(2) raw material after stirring is passed through twin screw extruder extruding pelletization, obtained medical environment-friendly PVC is material modified.
In described step (2), the extruder temperature of twin screw extruder is: district's temperature 155 DEG C, two district's temperature 155 DEG C, three district's temperature 150 DEG C, four district's temperature 148 DEG CHe five district temperature 145 DEG C.
Embodiment 5
A kind of medical environment-friendly PVC is material modified, the material modified raw material comprising following weight part of described medical environment-friendly PVC:
Polyvinyl chloride resin 120 parts
80 parts, softening agent
Weighting agent 20 parts
Thermo-stabilizer 7 parts
Lubricant 0.8 part.
The mixture that described polyvinyl chloride resin is made up of with weight ratio 4:1 calcium carbide process PVC resin and ethylene process polyvinyl chloride resin.
Described softening agent is the mixture be made up of with weight ratio 18:1 hexanaphthene 1,2-dioctyl phthalate diisononyl esters and epoxy soybean oil.
The mixture that described weighting agent is made up of with weight ratio 2:1.2:1 water-ground limestone, light calcium carbonate and kaolin.
The mixture that described thermo-stabilizer is made up of with weight ratio 1.2:1 Ca-Zn composite heat stabilizer and hydrotalcite thermal stabilizer; The mixture that described Ca-Zn composite heat stabilizer is made up of with weight ratio 1.5:1:1.5:1.2 calcium stearate, ricinolic acid calcium, Zinic stearas and zinc ricinate.
The mixture that described lubricant is made up of with weight ratio 2.5:1.2:1 oxidized polyethlene wax, pentaerythritol stearate and ethylene bis stearic acid amide.
Described medical environment-friendly PVC is material modified also comprises impact modifier 5-10 part, and described impact modifier is the mixture that the chlorinatedpolyethylene of 45% and the ethylene-vinyl acetate copolymer of vinyl acetate between to for plastic unit content 25% form with weight ratio 2.5:1 by chlorinity.
Described medical environment-friendly PVC is material modified also comprises fire retardant 5 parts, the mixture that described fire retardant is made up of with weight ratio 1.5:1 antimonous oxide and zinc borate.
Described medical environment-friendly PVC is material modified also comprises slipping agent 0.15 part and 0.05 part, pigment powder; Described slipping agent is the mixture be made up of with weight ratio 2.5:1.2:1 erucicamide, amine hydroxybenzene and N, N'-ethylene bis stearamide; Described pigment powder is particle diameter at the titanium dioxide of 5 μm; The mixture that described titanium dioxide is made up of with weight ratio 1:2.5 Rutile type Titanium Dioxide and anatase thpe white powder.
The preparation method that medical environment-friendly PVC is material modified, comprises the steps:
(1) take above-mentioned raw materials mixing by weight ratio, put into high speed blender, at 140 DEG C of temperature, stir 15min;
(2) raw material after stirring is passed through twin screw extruder extruding pelletization, obtained medical environment-friendly PVC is material modified.
In described step (2), the extruder temperature of twin screw extruder is: district's temperature 160 DEG C, two district's temperature 160 DEG C, three district's temperature 155 DEG C, four district's temperature 150 DEG CHe five district temperature 148 DEG C.
The material modified mechanical and physical performance of the medical environment-friendly PVC that embodiment 1-5 obtains is as shown in table 1:
Table 1
| Test event | Standard value | Embodiment 1 | Embodiment 2 | Embodiment 3 | Embodiment 4 | Embodiment 5 |
| Tensile strength (MPa) | ≥15.0 | 24.8 | 26.1 | 26.5 | 23.6 | 25.3 |
| Flexural strength (MPa) | ≥15.0 | 49.2 | 52.1 | 54.9 | 45.7 | 50.5 |
| Elongation at break (%) | ≥150 | 301 | 308 | 319 | 298 | 314 |
| Heat-drawn wire (DEG C) | ≥50.0 | 121.5 | 123.7 | 125.3 | 119.4 | 122.8 |
| Impact embrittlement temperature (DEG C) | ≤-20 | -25 | -30 | -30 | -25 | -30 |
| Heat-stable time (min) when 200 DEG C | ≥60 | 120 | 130 | 130 | 110 | 120 |
| Hardness/Shore D | ≥50 | 83 | 85 | 86 | 81 | 84 |
| Fire-retardant | V0 | V0 | V0 | V0 | V0 | V0 |
As can be seen from Table 1, the present invention obtain the material modified properties of medical environment-friendly PVC all beyond national standard, environmental protection, and resistance to gentle weather resistance is excellent, intensity is high, excellent shock resistance, good flame retardation effect, processing characteristics is excellent, excellent combination property.
Above-described embodiment is the present invention's preferably implementation, and in addition, the present invention can also realize by alternate manner, and any apparent replacement is all within protection scope of the present invention without departing from the inventive concept of the premise.
Claims (10)
1. a medical environment-friendly PVC is material modified, it is characterized in that: the material modified raw material comprising following weight part of described medical environment-friendly PVC:
Polyvinyl chloride resin 80-120 part
Softening agent 60-80 part
Weighting agent 10-20 part
Thermo-stabilizer 3-7 part
Lubricant 0.4-0.8 part.
2. the medical environment-friendly PVC of one according to claim 1 is material modified, it is characterized in that: the mixture that described polyvinyl chloride resin is made up of with weight ratio 2-4:1 calcium carbide process PVC resin and ethylene process polyvinyl chloride resin.
3. the medical environment-friendly PVC of one according to claim 1 is material modified, it is characterized in that: described softening agent is the mixture be made up of with weight ratio 15-18:1 hexanaphthene 1,2-dioctyl phthalate diisononyl esters and epoxy soybean oil.
4. the medical environment-friendly PVC of one according to claim 1 is material modified, it is characterized in that: the mixture that described weighting agent is made up of with weight ratio 1-2:0.8-1.2:1 water-ground limestone, light calcium carbonate and kaolin.
5. the medical environment-friendly PVC of one according to claim 1 is material modified, it is characterized in that: the mixture that described thermo-stabilizer is made up of with weight ratio 0.8-1.2:1 Ca-Zn composite heat stabilizer and hydrotalcite thermal stabilizer; The mixture that described Ca-Zn composite heat stabilizer is made up of with weight ratio 0.5-1.5:1:0.5-1.5:0.8-1.2 calcium stearate, ricinolic acid calcium, Zinic stearas and zinc ricinate.
6. the medical environment-friendly PVC of one according to claim 1 is material modified, it is characterized in that: the mixture that described lubricant is made up of with weight ratio 1.5-2.5:0.8-1.2:1 oxidized polyethlene wax, pentaerythritol stearate and ethylene bis stearic acid amide.
7. the medical environment-friendly PVC of one according to claim 1 is material modified, it is characterized in that: described medical environment-friendly PVC is material modified also comprises impact modifier 5-10 part, described impact modifier is the mixture that the chlorinatedpolyethylene of 25%-45% and the ethylene-vinyl acetate copolymer of vinyl acetate between to for plastic unit content 5%-25% form with weight ratio 1.5-2.5:1 by chlorinity.
8. the medical environment-friendly PVC of one according to claim 1 is material modified, it is characterized in that: described medical environment-friendly PVC is material modified also comprises fire retardant 1-5 part, the mixture that described fire retardant is made up of with weight ratio 0.5-1.5:1 antimonous oxide and zinc borate.
9. the preparation method that a kind of medical environment-friendly PVC as described in any one of claim 1-8 is material modified, is characterized in that: comprise the steps:
(1) take above-mentioned raw materials mixing by weight ratio, put into high speed blender, at 100-140 DEG C of temperature, stir 15-25min;
(2) raw material after stirring is passed through twin screw extruder extruding pelletization, obtained medical environment-friendly PVC is material modified.
10. the preparation method that a kind of medical environment-friendly PVC according to claim 9 is material modified, it is characterized in that: in described step (2), the extruder temperature of twin screw extruder is: a district temperature 138-160 DEG C, two district temperature 135-160 DEG C, three district temperature 135-155 DEG C, four district temperature 132-150 DEG CHe five district temperature 130-148 DEG C.
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