CN109320741A - A kind of vulcanization process of environment-friendly type medical rubber products - Google Patents
A kind of vulcanization process of environment-friendly type medical rubber products Download PDFInfo
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- CN109320741A CN109320741A CN201811181659.6A CN201811181659A CN109320741A CN 109320741 A CN109320741 A CN 109320741A CN 201811181659 A CN201811181659 A CN 201811181659A CN 109320741 A CN109320741 A CN 109320741A
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J3/00—Processes of treating or compounding macromolecular substances
- C08J3/24—Crosslinking, e.g. vulcanising, of macromolecules
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J2309/00—Characterised by the use of homopolymers or copolymers of conjugated diene hydrocarbons
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J2309/00—Characterised by the use of homopolymers or copolymers of conjugated diene hydrocarbons
- C08J2309/06—Copolymers with styrene
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J2323/00—Characterised by the use of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Derivatives of such polymers
- C08J2323/26—Characterised by the use of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Derivatives of such polymers modified by chemical after-treatment
- C08J2323/28—Characterised by the use of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Derivatives of such polymers modified by chemical after-treatment by reaction with halogens or halogen-containing compounds
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J2333/00—Characterised by the use of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and only one being terminated by only one carboxyl radical, or of salts, anhydrides, esters, amides, imides, or nitriles thereof; Derivatives of such polymers
- C08J2333/04—Characterised by the use of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and only one being terminated by only one carboxyl radical, or of salts, anhydrides, esters, amides, imides, or nitriles thereof; Derivatives of such polymers esters
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J2375/00—Characterised by the use of polyureas or polyurethanes; Derivatives of such polymers
- C08J2375/04—Polyurethanes
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J2383/00—Characterised by the use of macromolecular compounds obtained by reactions forming in the main chain of the macromolecule a linkage containing silicon with or without sulfur, nitrogen, oxygen, or carbon only; Derivatives of such polymers
- C08J2383/04—Polysiloxanes
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- Chemical Kinetics & Catalysis (AREA)
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- Polymers & Plastics (AREA)
- Organic Chemistry (AREA)
- Compositions Of Macromolecular Compounds (AREA)
Abstract
The invention discloses a kind of vulcanization process of environment-friendly type medical rubber products, include the following steps: S1, at rubber powder, will remove iron filings and impurity to the rubber pulverizing of vulcanizing treatment with electromagnetic method, then rubber powder is sieved；S2, rubber powder, sulphur, carbon black, cross-linking aid, filler, compounding agent are mixed, S3, it is preheated by energization magnetic induction coil to tank body is kneaded, mixed material is carried out being kneaded in being kneaded tank body to form uncrosslinked medical grade rubber profile, and pass through the steam that air inlet pipe is passed through 180-250 DEG C into mixing tank body, and keep in tank body pressure in 1-4MPa, after reacting 120min, stop being passed through steam into tank body；The formula of the invention is simple, does not generate exudate, volatile matter of pollution etc., while also having many advantages, such as environmental protection, energy conservation, saving raw material, high production efficiency and easy to control；Using Na22 and MD as promotor, constitutes sulfurless curing system and without sulphur promotion system, do not contain sulphur in component, avoid the pollution of sulphur.
Description
Technical field
The invention belongs to environment-friendly type medical rubber products technical fields, and more specifically more particularly to a kind of environment-friendly type is cured
With the vulcanization process of rubber product.
Background technique
With the development of society, the rubber product type for being applied to medicine and hygiene fields is more and more, such as various glue,medicinals
Plug, asepsis injector piston, syringe sealant sealing, hose, conduit, sealing element, valve, baby nipple, tube for blood transfusion,latex etc..
Traditional medical rubber product is mostly natural rubber or synthetic rubber in sulfur cross-linking system, peroxide cure body
Under the effects of system, resin curative systems or Metal-oxide vulcanization system, vulcanization crosslinking is formed under high temperature, condition of high voltage.?
Under high temperature, condition of high voltage, above-mentioned vulcanizing system is easy to produce pollution human body, the exudate of medicament, volatile matter.
Existing druggist rubber sundrier and preparation method thereof, complex technical process, the product feature of environmental protection is poor, safety in utilization
It is not strong and low using corrosion resistance.
Summary of the invention
The purpose of the present invention is to solve disadvantages existing in the prior art, and a kind of environment-friendly type medical rubber proposed
The vulcanization process of product.
To achieve the above object, the invention provides the following technical scheme:
A kind of vulcanization process of environment-friendly type medical rubber products, includes the following steps:
S1, at rubber powder, iron filings and impurity will be removed with electromagnetic method, then by rubber to the rubber pulverizing of vulcanizing treatment
Powder sieving；
S2, rubber powder, sulphur, carbon black, cross-linking aid, filler, compounding agent are mixed, when first section stirs, blender
Revolving speed is 50-80 revs/min, mixing time 5-13min, and when latter end stirs, blender revolving speed is 200-300 revs/min, is stirred
Mixing the time is 10-15min, obtains uniformly mixed mixed material；
S3, it is preheated by energization magnetic induction coil to tank body is kneaded, mixed material is carried out in being kneaded tank body
Mixing forms uncrosslinked medical grade rubber profile, and is passed through 180-250 DEG C of steam into mixing tank body by air inlet pipe, and keep
Pressure stops being passed through steam into tank body in 1-4MPa after reacting 120min in tank body；
S4, the valve for opening nitrogen inlet duct, nitrogen is passed through into tank body, is cooled to 150 DEG C or less stoppings to vulcanizing tank
It is passed through nitrogen；
S5,3-4 pressurization, pressure discharge operations are carried out, be exhausted, then require to be vulcanized according to vulcanization time.
Preferably, the mesh number of sieve is 10-180 mesh in the step S1.
Preferably, the rubber is composite material comprising butadiene-styrene rubber, halogenated butyl rubber, nitrile rubber, isoamyl rubber
Glue, acrylic rubber, haloflex, butadiene-vinylpyridine rubber, silicon rubber, polyurethane rubber.
Preferably, the butadiene-styrene rubber, halogenated butyl rubber, nitrile rubber, isoprene rubber, acrylic rubber, chlorination
Polyethylene, butadiene-vinylpyridine rubber, silicon rubber and polyurethane rubber poidometer by weight are as follows: 12-16 parts of butadiene-styrene rubber, halogen
Change butyl rubber 20-23 parts, 21-23 parts of nitrile rubber, 15-18 parts of isoprene rubber, 5-9 parts of acrylic rubber, chlorinated polyethylene
5-6 parts of alkene, 3-6 parts of butadiene-vinylpyridine rubber, 5-8 parts of silicon rubber, 23-27 parts of polyurethane rubber.
Preferably, the rubber powder, sulphur, carbon black, cross-linking aid, filler, compounding agent poidometer by weight are as follows: rubber
52-56 parts of rubber powder, 20-23 parts of sulphur, 23-26 parts of carbon black, 5-8 parts of cross-linking aid, 10-13 parts of filler, 20-24 parts of compounding agent.
Preferably, compounding agent poidometer by weight is as follows: 6-9 parts of the amino alkoxide of the based bisulfide containing carboxylic acid,
1-10 parts of activating agent zinc oxide, 1-5 parts of dispersing agent stearic acid, 0.5-2 parts of 264 anti-aging agent, 18-23 parts of precipitated calcium carbonate, talcum
23-50 parts of powder, 0-20 parts of naphthenic oil, 12-13 parts of resin curative HY-2056 resin, 0-3 parts of accelerant N a22, altax
0-5 parts.
Preferably, the carbon black is high abrasion furnace carbon black N330, the cross-linking aid selected from simple function group cross-linking aid, two officials
Can roll into a ball cross-linking aid, trifunctional cross-linking aid, four-functional group cross-linking aid or polyfunctional group cross-linking aid and any combination thereof,
The filler includes clay, clay, mica and graphite.
Compared with prior art, the beneficial effects of the present invention are: a kind of environment-friendly type medical rubber products provided by the invention
Vulcanization process, compared with traditional technology, the formula of the invention is simple, does not generate exudate, volatile matter of pollution etc., simultaneously
Also have many advantages, such as environmental protection, energy conservation, save raw material, high production efficiency and easy to control；
Rubber is composite material comprising butadiene-styrene rubber, halogenated butyl rubber, nitrile rubber, isoprene rubber, acrylate
Rubber, haloflex, butadiene-vinylpyridine rubber, silicon rubber, polyurethane rubber, corrosion resistance is strong, using Na22 and MD conduct
Promotor constitutes sulfurless curing system and without sulphur promotion system, sulphur is not contained in component, avoids the pollution of sulphur.
Specific embodiment
In order to make the objectives, technical solutions, and advantages of the present invention clearer, below in conjunction with specific embodiment, to this
Invention is further elaborated.It should be appreciated that the specific embodiments described herein are merely illustrative of the present invention, not
For limiting the present invention.Based on the embodiments of the present invention, those of ordinary skill in the art are not before making creative work
Every other embodiment obtained is put, shall fall within the protection scope of the present invention.
Embodiment 1
A kind of vulcanization process of environment-friendly type medical rubber products, includes the following steps:
S1, at rubber powder, iron filings and impurity will be removed with electromagnetic method, then by rubber to the rubber pulverizing of vulcanizing treatment
Powder sieving；
S2, rubber powder, sulphur, carbon black, cross-linking aid, filler, compounding agent are mixed, when first section stirs, blender
Revolving speed is 50 revs/min, mixing time 13min, and when latter end stirs, blender revolving speed is 300 revs/min, and mixing time is
10min obtains uniformly mixed mixed material；
S3, it is preheated by energization magnetic induction coil to tank body is kneaded, mixed material is carried out in being kneaded tank body
Mixing forms uncrosslinked medical grade rubber profile, and is passed through 200 DEG C of steam into mixing tank body by air inlet pipe, and keep tank body
Interior pressure stops being passed through steam into tank body in 2MPa after reacting 120min；
S4, the valve for opening nitrogen inlet duct, nitrogen is passed through into tank body, is cooled to 150 DEG C or less stoppings to vulcanizing tank
It is passed through nitrogen；
S5,3 pressurizations, pressure discharge operations are carried out, be exhausted, then require to be vulcanized according to vulcanization time.
Specifically, the mesh number of sieve is 100 mesh in the step S1.
Specifically, the rubber is composite material comprising butadiene-styrene rubber, halogenated butyl rubber, nitrile rubber, isoamyl rubber
Glue, acrylic rubber, haloflex, butadiene-vinylpyridine rubber, silicon rubber, polyurethane rubber.
Specifically, the butadiene-styrene rubber, halogenated butyl rubber, nitrile rubber, isoprene rubber, acrylic rubber, chlorination
Polyethylene, butadiene-vinylpyridine rubber, silicon rubber and polyurethane rubber poidometer by weight are as follows: 12 parts of butadiene-styrene rubber, halogenation
20 parts of butyl rubber, 21 parts of nitrile rubber, 18 parts of isoprene rubber, 9 parts of acrylic rubber, 6 parts of haloflex, butadiene-vinylpyridine rubber
6 parts, 8 parts of silicon rubber, 27 parts of polyurethane rubber.
Specifically, the rubber powder, sulphur, carbon black, cross-linking aid, filler, compounding agent poidometer by weight are as follows: rubber
52 parts of rubber powder, 20 parts of sulphur, 23 parts of carbon black, 5 parts of cross-linking aid, 10 parts of filler, 20 parts of compounding agent.
Specifically, compounding agent poidometer by weight is as follows: 6 parts of the amino alkoxide of the based bisulfide containing carboxylic acid is lived
1 part of property agent zinc oxide, 5 parts of dispersing agent stearic acid, 2 parts of 264 anti-aging agent, 20 parts of precipitated calcium carbonate, 40 parts of talcum powder, naphthenic oil 15
Part, 12 parts of resin curative HY-2056 resin, 3 parts of accelerant N a22,5 parts of altax.
Specifically, the carbon black is high abrasion furnace carbon black N330, the cross-linking aid selected from simple function group cross-linking aid, two officials
Can roll into a ball cross-linking aid, trifunctional cross-linking aid, four-functional group cross-linking aid or polyfunctional group cross-linking aid and any combination thereof,
The filler includes clay, clay, mica and graphite.
Embodiment 2
A kind of vulcanization process of environment-friendly type medical rubber products, includes the following steps:
S1, at rubber powder, iron filings and impurity will be removed with electromagnetic method, then by rubber to the rubber pulverizing of vulcanizing treatment
Powder sieving；
S2, rubber powder, sulphur, carbon black, cross-linking aid, filler, compounding agent are mixed, when first section stirs, blender
Revolving speed is 80 revs/min, mixing time 13min, and when latter end stirs, blender revolving speed is 300 revs/min, and mixing time is
15min obtains uniformly mixed mixed material；
S3, it is preheated by energization magnetic induction coil to tank body is kneaded, mixed material is carried out in being kneaded tank body
Mixing forms uncrosslinked medical grade rubber profile, and is passed through 250 DEG C of steam into mixing tank body by air inlet pipe, and keep tank body
Interior pressure stops being passed through steam into tank body in 4MPa after reacting 120min；
S4, the valve for opening nitrogen inlet duct, nitrogen is passed through into tank body, is cooled to 150 DEG C or less stoppings to vulcanizing tank
It is passed through nitrogen；
S5,4 pressurizations, pressure discharge operations are carried out, be exhausted, then require to be vulcanized according to vulcanization time.
Specifically, the mesh number of sieve is 180 mesh in the step S1.
Specifically, the rubber is composite material comprising butadiene-styrene rubber, halogenated butyl rubber, nitrile rubber, isoamyl rubber
Glue, acrylic rubber, haloflex, butadiene-vinylpyridine rubber, silicon rubber, polyurethane rubber.
Specifically, the butadiene-styrene rubber, halogenated butyl rubber, nitrile rubber, isoprene rubber, acrylic rubber, chlorination
Polyethylene, butadiene-vinylpyridine rubber, silicon rubber and polyurethane rubber poidometer by weight are as follows: 16 parts of butadiene-styrene rubber, halogenation
23 parts of butyl rubber, 23 parts of nitrile rubber, 15 parts of isoprene rubber, 5 parts of acrylic rubber, 5 parts of haloflex, butadiene-vinylpyridine rubber
3 parts, 8 parts of silicon rubber, 23 parts of polyurethane rubber.
Specifically, the rubber powder, sulphur, carbon black, cross-linking aid, filler, compounding agent poidometer by weight are as follows: rubber
52 parts of rubber powder, 20 parts of sulphur, 23 parts of carbon black, 5 parts of cross-linking aid, 13 parts of filler, 24 parts of compounding agent.
Specifically, compounding agent poidometer by weight is as follows: 9 parts of the amino alkoxide of the based bisulfide containing carboxylic acid is lived
10 parts of property agent zinc oxide, 5 parts of dispersing agent stearic acid, 2 parts of 264 anti-aging agent, 18 parts of precipitated calcium carbonate, 50 parts of talcum powder, naphthenic oil
20 parts, 13 parts of resin curative HY-2056 resin, 3 parts of accelerant N a22,5 parts of altax.
Specifically, the carbon black is high abrasion furnace carbon black N330, the cross-linking aid selected from simple function group cross-linking aid, two officials
Can roll into a ball cross-linking aid, trifunctional cross-linking aid, four-functional group cross-linking aid or polyfunctional group cross-linking aid and any combination thereof,
The filler includes clay, clay, mica and graphite.
In summary: a kind of vulcanization process of environment-friendly type medical rubber products provided by the invention, compared with traditional technology,
The formula of the invention is simple, does not generate exudate, volatile matter of pollution etc., at the same also have environmental protection, energy conservation, save raw material,
High production efficiency and it is easy to control the advantages that；
Rubber is composite material comprising butadiene-styrene rubber, halogenated butyl rubber, nitrile rubber, isoprene rubber, acrylate
Rubber, haloflex, butadiene-vinylpyridine rubber, silicon rubber, polyurethane rubber, corrosion resistance is strong, using Na22 and MD conduct
Promotor constitutes sulfurless curing system and without sulphur promotion system, sulphur is not contained in component, avoids the pollution of sulphur.
Product of the invention is long-term in anechoic tank, in use, not only have good underwater sound absorption effect, and can
To keep the cleaning of anechoic tank, water quality, odorless, tasteless improves product service life, improves pond working environment.
Finally, it should be noted that the foregoing is only a preferred embodiment of the present invention, it is not intended to restrict the invention,
Although the present invention is described in detail referring to the foregoing embodiments, for those skilled in the art, still may be used
To modify the technical solutions described in the foregoing embodiments or equivalent replacement of some of the technical features,
All within the spirits and principles of the present invention, any modification, equivalent replacement, improvement and so on should be included in of the invention
Within protection scope.
Claims (7)
1. a kind of vulcanization process of environment-friendly type medical rubber products, characterized by the following steps:
S1, at rubber powder, iron filings and impurity will be removed with electromagnetic method, then by rubber powder mistake to the rubber pulverizing of vulcanizing treatment
Sieve；
S2, rubber powder, sulphur, carbon black, cross-linking aid, filler, compounding agent are mixed, when first section stirs, blender revolving speed
It is 50-80 revs/min, mixing time 5-13min, when latter end stirs, blender revolving speed is 200-300 revs/min, when stirring
Between be 10-15min, obtain uniformly mixed mixed material；
S3, it is preheated by energization magnetic induction coil to tank body is kneaded, mixed material is kneaded in being kneaded tank body
Uncrosslinked medical grade rubber profile is formed, and 180-250 DEG C of steam is passed through into mixing tank body by air inlet pipe, and keep tank body
Interior pressure stops being passed through steam into tank body in 1-4MPa after reacting 120min；
S4, the valve for opening nitrogen inlet duct, nitrogen is passed through into tank body, 150 DEG C or less stoppings is cooled to vulcanizing tank and is passed through
Nitrogen；
S5,3-4 pressurization, pressure discharge operations are carried out, be exhausted, then require to be vulcanized according to vulcanization time.
2. a kind of vulcanization process of environment-friendly type medical rubber products described in claim 1, it is characterised in that: in the step S1
The mesh number of sieve is 10-180 mesh.
3. a kind of vulcanization process of environment-friendly type medical rubber products described in claim 1, it is characterised in that: the rubber is multiple
Condensation material comprising butadiene-styrene rubber, halogenated butyl rubber, nitrile rubber, isoprene rubber, acrylic rubber, haloflex,
Butadiene-vinylpyridine rubber, silicon rubber, polyurethane rubber.
4. a kind of vulcanization process of environment-friendly type medical rubber products as claimed in claim 3, it is characterised in that: the butylbenzene rubber
Glue, halogenated butyl rubber, nitrile rubber, isoprene rubber, acrylic rubber, haloflex, butadiene-vinylpyridine rubber, silicon rubber and poly-
Urethane rubber poidometer by weight is as follows: 12-16 parts of butadiene-styrene rubber, 20-23 parts of halogenated butyl rubber, nitrile rubber
21-23 parts, 15-18 parts of isoprene rubber, 5-9 parts of acrylic rubber, 5-6 parts of haloflex, 3-6 parts of butadiene-vinylpyridine rubber, silicon rubber
5-8 parts of glue, 23-27 parts of polyurethane rubber.
5. a kind of vulcanization process of environment-friendly type medical rubber products described in claim 1, it is characterised in that: the rubber powder,
Sulphur, carbon black, cross-linking aid, filler, compounding agent poidometer by weight are as follows: 52-56 parts of rubber powder, 20-23 parts of sulphur, charcoal
23-26 parts black, 5-8 parts of cross-linking aid, 10-13 parts of filler, 20-24 parts of compounding agent.
6. a kind of vulcanization process of environment-friendly type medical rubber products described in claim 1, it is characterised in that: the compounding agent is pressed
Parts by weight poidometer is as follows: 1-10 parts of 6-9 parts of amino alkoxide, activating agent zinc oxide, the dispersing agent of the based bisulfide containing carboxylic acid are hard
1-5 parts of resin acid, 0.5-2 parts of 264 anti-aging agent, 18-23 parts of precipitated calcium carbonate, 23-50 parts of talcum powder, 0-20 parts of naphthenic oil, resin
12-13 parts of vulcanizing agent HY-2056 resin, 0-3 parts of accelerant N a22,0-5 parts of altax.
7. a kind of vulcanization process of environment-friendly type medical rubber products described in claim 1, it is characterised in that: the carbon black is height
Abrasion resistant carbon black N330, the cross-linking aid are selected from simple function group cross-linking aid, two functional group's cross-linking aids, trifunctional and are crosslinked and help
Agent, four-functional group cross-linking aid or polyfunctional group cross-linking aid and any combination thereof, the filler include clay, clay, mica
And graphite.
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| CN201811181659.6A CN109320741A (en) | 2018-10-11 | 2018-10-11 | A kind of vulcanization process of environment-friendly type medical rubber products |
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| CN201811181659.6A CN109320741A (en) | 2018-10-11 | 2018-10-11 | A kind of vulcanization process of environment-friendly type medical rubber products |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115594895A (en) * | 2022-10-25 | 2023-01-13 | 联科华技术有限公司（Cn） | Medical rubber product prepared from monoatomic zinc material with ultralow zinc content and preparation method thereof |
-
2018
- 2018-10-11 CN CN201811181659.6A patent/CN109320741A/en not_active Withdrawn
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115594895A (en) * | 2022-10-25 | 2023-01-13 | 联科华技术有限公司（Cn） | Medical rubber product prepared from monoatomic zinc material with ultralow zinc content and preparation method thereof |
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Application publication date: 20190212 |