CN107383635A - A kind of rubber catheter lock ring - Google Patents
A kind of rubber catheter lock ring Download PDFInfo
- Publication number
- CN107383635A CN107383635A CN201710687662.4A CN201710687662A CN107383635A CN 107383635 A CN107383635 A CN 107383635A CN 201710687662 A CN201710687662 A CN 201710687662A CN 107383635 A CN107383635 A CN 107383635A
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- China
- Prior art keywords
- lock ring
- parts
- catheter lock
- rubber catheter
- rubber
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L23/00—Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers
- C08L23/02—Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers not modified by chemical after-treatment
- C08L23/16—Elastomeric ethene-propene or ethene-propene-diene copolymers, e.g. EPR and EPDM rubbers
-
- 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
- C08K3/20—Oxides; Hydroxides
- C08K3/22—Oxides; Hydroxides of metals
- C08K2003/2296—Oxides; Hydroxides of metals of zinc
-
- 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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- Chemical & Material Sciences (AREA)
- Health & Medical Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Organic Chemistry (AREA)
- Materials For Medical Uses (AREA)
Abstract
The invention discloses a kind of rubber catheter lock ring, include the material of following percentage by weight：EPDM rubbers, 80~120 parts；Pre-process white carbon QCR, 5~25 parts；Pre-process 80,50~100 parts of diatomite TP；85,3~8 parts of silane coupler KC；High-flash paraffin oil NP330,10~40 parts；Zinc oxide, 3~20 parts；Sulphur, 0.3~3 part；Accelerator CBS, 0.3~3 part；Accelerant MBT S, 1~5 part；Accelerator TBZTD, 0.5~4 part；Accelerant C LD, 1~5 part；Age resistor CPL, 0.5~5 part；80,0.5~5 part of dispersant TL；Ultraviolet screener SORP; 0.5~2 part, rational raw material selection, rational raw material ratio in of the invention; obtained rubber catheter lock ring; on the basis of original technology achievement, by innovating again, its all technical is set to meet customer requirement; and possess oil resistant, high temperature resistant, twisting resistance performance; the present invention disclosure satisfy that client's requirement, accomplish scale production, and cost of implementation is controllable, have stronger market competition advantage.
Description
Technical field
The present invention relates to automobile brake system field of material technology, and in particular to a kind of rubber catheter lock ring.
Background technology
Rubber catheter lock ring, products application play fixation on household electrical appliances, to the circuit conduit inside household electrical appliances.Product is
Gum part, it is desirable to it is heat-resisting, water-fast, do not dye for white, meet ROHS, REACH requirement and U.S.'s NSF certifications.
Above performance requirement proposes very high requirement to formula design, and white rubber product needs to use largely in vain
Color filler can suppress the vulcanization of rubber as reinforcing filler, the faintly acid of white filler, have the easy sticking to mould of product, product overlap difficulty to tear
The defects of；Product one end is the neck of shape of threads, plays fixation, white article hot tear crack poor performance, screw thread during depanning
The rubber of top weak location is easily broken, and difficult cleaning, influences production efficiency and qualification rate after breaking.
The content of the invention
To solve the above problems, the present invention proposes a kind of rubber catheter lock ring.
To realize the object of the invention, the technical scheme of use is：A kind of rubber catheter lock ring, the rubber catheter lock ring bag
Include the material of following parts by weight：
EPDM rubbers：80~120 parts；
Pre-process white carbon QCR：5~25 parts；
Pre-process diatomite TP-80：50~100 parts；
Silane coupler KC-85：3~8 parts；
High-flash paraffin oil NP330：10~40 parts；
Auxiliary curing agent：3~20 parts；
Vulcanizing agent：0.3~3 part；
Accelerator：2.8~17 parts；
Age resistor CPL：0.5~5 part；
Dispersant TL-80：0.5~5 part；
Ultraviolet screener SORP：0.5~2 part.
Preferably, the kicker in the rubber catheter lock ring raw material is arranged to zinc oxide.
Preferably, vulcanizing agent is arranged to sulphur in the rubber catheter lock ring raw material.
Preferably, accelerator includes accelerator CBS, accelerant MBT S, accelerator in the rubber catheter lock ring raw material
TBZTD and accelerant C LD.
Preferably, the accelerator CBS in the rubber catheter lock ring raw material in accelerator, accelerant MBT S, accelerator
The number that TBZTD and accelerant C LD accounts for total raw material is arranged to accelerator CBS：0.3~3 part, accelerant MBT S：1~5 part, promotion
Agent TBZTD：0.5~4 part and accelerant C LD：1~5 part.
Preferably, the preparation method of the rubber catheter lock ring is as follows：
1) is added to pulverizer after the rubber catheter lock ring raw material of the parts by weight in claim 1 are cleaned
In, carry out being crushed to certain fineness；
2) material after pulverizer crushes that obtains step 1 is transferred to microwave high-temperature in microwave reaction kettle and reacted,
And reacted fluid is filtered；
3) material after the filtering that obtains step 2 is transferred to kneader, sets mixing speed to be arranged to 40~80r/
Min, open kneader and carry out kneading stirring；
4) material after stirring is mediated in step 3 is transferred in extruder by, after setting extrusion temperature, and is mixed
Extruding；
5) material after extruding is mixed in step 4 is transferred in pressing machine by, and pressing and forming is carried out by pressing machine；
6) material after pressing and forming in step 5 is transferred in cutter by, and qualified rubber is cut into by cutter
Conduit lock ring.
Preferably, the fineness that the raw material in the preparation method step 1 of the rubber catheter lock ring crush is 30~100
Mesh.
Preferably, the temperature in the preparation method step 3 of the rubber catheter lock ring in kneader is 80~250 DEG C, institute
The time for stating the kneading stirring of the preparation method step 3 of rubber catheter lock ring is 3~10h.
Preferably, the temperature in the extruder in the preparation method step 4 of the rubber catheter lock ring is 150~250 DEG C.
Preferably, the rubber pulverizing in the preparation method step 1 of the rubber catheter lock ring uses normal temperature crushing up, crushes
Machine is arranged to carry groove roller and the ditch smooth roll pulverizer without fluted roller.
Beneficial effects of the present invention are：Rational raw material selection, rational raw material in rubber catheter lock ring of the present invention
Proportioning, obtained rubber catheter lock ring, on the basis of original technology achievement, by innovating again, makes its all technical
Meet customer requirement, and possess oil resistant, high temperature resistant, twisting resistance performance, can further develop respective series product, extend company
Product chain, and disclosure satisfy that client's requirement, accomplish scale production, cost of implementation is controllable, and the present invention has stronger
Market competition advantage.
Brief description of the drawings
Fig. 1 is rubber catheter lock ring preparation technology flow chart of the present invention.
Embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is carried out clear, complete
Site preparation describes, it is clear that described embodiment is only part of the embodiment of the present invention, rather than whole embodiments.It is based on
Embodiment in the present invention, those of ordinary skill in the art are obtained every other under the premise of creative work is not made
Embodiment, belong to the scope of protection of the invention.
Embodiment 1
The raw material proportioning of rubber catheter lock ring：EPDM rubbers：120 parts；Pre-process white carbon QCR：25 parts；Pre-process diatom
Native TP-80：70 parts；Silane coupler KC-85：5 parts；High-flash paraffin oil NP330：20 parts；Zinc oxide：10 parts；Sulphur：3 parts；
Accelerator CBS：3 parts；Accelerant MBT S：5 parts；Accelerator TBZTD：4 parts；Accelerant C LD：5 parts；Age resistor CPL：3 parts；It is scattered
Agent TL-80：3 parts；Ultraviolet screener SORP：2 parts.
Embodiment 2
The raw material proportioning of rubber catheter lock ring：EPDM rubbers：110 parts；Pre-process white carbon QCR：20 parts；Pre-process diatom
Native TP-80：80 parts；Silane coupler KC-85：8 parts；High-flash paraffin oil NP330：20 parts；Zinc oxide：15 parts；Sulphur：3 parts；
Accelerator CBS：3 parts；Accelerant MBT S：5 parts；Accelerator TBZTD：4 parts；Accelerant C LD：5 parts；Age resistor CPL：5 parts；It is scattered
Agent TL-80：5 parts；Ultraviolet screener SORP：2 parts.
Embodiment 3
The raw material proportioning of rubber catheter lock ring：EPDM rubbers：100 parts；Pre-process white carbon QCR：20 parts；Pre-process diatom
Native TP-80：80 parts；Silane coupler KC-85：5 parts；High-flash paraffin oil NP330：30 parts；Zinc oxide：15 parts；Sulphur：3 parts；
Accelerator CBS：3 parts；Accelerant MBT S：3 parts；Accelerator TBZTD：3 parts；Accelerant C LD：3 parts；Age resistor CPL：5 parts；It is scattered
Agent TL-80：5 parts；Ultraviolet screener SORP：2 parts.
Embodiment 4
The raw material proportioning of rubber catheter lock ring：EPDM rubbers, 120 parts；Pre-process white carbon QCR, 25 parts；Pre-process diatom
Native TP-80,80 parts；Silane coupler KC-85,8 parts；High-flash paraffin oil NP330,15 parts；Zinc oxide, 10 parts；Sulphur, 3 parts；
Accelerator CBS, 3 parts；Accelerant MBT S, 3 parts；Accelerator TBZTD, 3 parts；Accelerant C LD, 3 parts；Age resistor CPL, 5 parts；It is scattered
Agent TL-80,5 parts；Ultraviolet screener SORP, 2 parts.
In above-mentioned raw materials：
EPDM rubber, EPDM rubber (propylene diene hydrocarbon M classes rubber) be have broad field of application elastomer, EPDM
It is exhausted that rubber is used for oscillator and oil sealing, glass runway, irradiator, garden and device water pipe, tubing, washing machine, transmission having electronic
Edge material；It is also used as the anti-water-borne high pressure polymerisation thing hawser in connection facility, pushes up roof film, rubber manufacturing machinery article,
Plastic impact is changed, thermoplastic, vulcanizes rubber, as oil additives, pond scriber, the connection of electronics hawser, RV rooms
Top application；The gratifying compatibility of EPDM displays and refractory hydraulic liquid body, ketone, hot and cold water and alkali and dissatisfactory compatible
Property with majority oil, gasoline, kerosene, fragrance and aliphatic hydrocarbon, by the solvent of halogenation and the acid concentrated；The main physical property of EPDM is that it has
Distinguished heat, ozone and weather resistance；To polar substances and steam prevent be also.It has outstanding characteristic electron；It has
Retain the ability of light color.
Diatomite, diatomite are a kind of biogenic siliceous sedimentary rocks, diatomite paint additive product, have hole
The features such as degree is big, absorbability is strong, chemical property is stable, wear-resisting, heat-resisting, excellent surface property can be provided for coating, increase-volume, increased
Thick and raising adhesive force.Because it has larger pore volume, film can be made to shorten drying time.The use of resin can also be reduced
Amount, reduces cost.The product is considered as a kind of efficient coating flatting silica product with good cost performance, by the world
Numerous large-scale coating material production business is widely used in emulsion paint, coating for internal and external wall, alkyd resin coating and polyester as articles for use are specified
In the multiple coating systems such as paint, the production for the building coating that is particularly suitable for use in.Using in coating, paint, control that can be balanced applies
Film lustrous surface, increase the wearability and mar-resistance of film, dry, deodorization and air can also be purified, sound insulation, waterproof and
Heat-insulated, the characteristics of permeability is good.
White Carbon black, i.e. aerosil, there is good activity and adsorption rate, reinforcing effect is good, there is very high insulation
Property, (except hydrofluoric acid) not soluble in water and sour is dissolved in caustic soda, is not decomposed by high temperature.Its whiteness is good, and being filled in rubber can be obvious
Improve the physical property of sizing material.
Silane coupler is a kind of organo-silicon compound simultaneously containing two kinds of different chemical property groups in the molecule, most
It is early to be applied on fiberglass reinforced plastics (fiberglass), make the surface conditioning agent of glass fibre, make fiberglass mechanical performance,
Electric property and ageing resistace are greatly improved, and the importance in frp industry gains public acceptance already.
Paraffin oil, paraffin oil are a kind of mineral oil, be from crude cut obtained by colorless and odorless mixture, paraffin
It is (poly- that oily (rubber filling oil) is widely used in IIR (butyl rubber), EPM (EP rubbers), EPDM (ethylene propylene diene rubber), IR
Isoprene rubber), NR (natural rubber) and some thermoplastic elastomers, be especially used in and require that smell is small, priming color is good, resistance to
For light and heat according to the good rubber of performance, this shows of crucial importance in the product manufacturings such as household electrical appliance, toy for children.In many
In China Synthetic Rubber Industry application reference, paraffin oil has been widely used in rubber processing formula and serves critically important work
With.
Zinc oxide, zinc oxide have application, including plastics, ceramics, glass, water as additive in multiple material and product
Mud, lubricant, paint, ointment, adhesive, sealant, pigment, food (zinc supplementation agent), battery, Ferrite Material, fire-retardant material
Material and first-aid bandage etc..
Sulphur, it is a kind of inorganic sulfur agent, vulcanization polydiene (natural gum, butadiene-styrene rubber, butadiene acrylonitrile rubber, synthesis isoamyl two
Alkene rubber) have and extend time of scorch, caloric value is reduced, the features such as stretching strength is high, and reversion resistance is excellent.
Accelerator, vulcanization accelerator abbreviation accelerator.The material of sulfurization can be promoted.The cure time of rubber can be shortened
Or curing temperature is reduced, reduce vulcanizing agent dosage and improve physical and mechanical properties of rubber etc..
Age resistor, age resistor have antioxygen efficiency it is good, it is less toxic, do not stimulate skin, be heat-resist, be pollution-free, coloring it is small
The features such as.
Dispersant, dispersant (Dispersant) are one kind in intramolecular while have two kinds of lipophile and hydrophily opposite
The interfacial agent of property, can it is uniformly dispersing those be poorly soluble in the inorganic of liquid, the solid particle of organic pigment, simultaneously
Also the sedimentation and cohesion of solid particle can be prevented, forms the medicament needed for stable suspension.Dispersant is divided into fatty acid, fat
Race's amide-type and esters.
Ultraviolet screener, it can suppress and delay ultraviolet to cause the material of light aging to polymer, mainly be divided shield type
Ultraviolet can be absorbed or reflected with class, light-shielding types such as light absorbs types, polymeric inner, such as charcoal are penetrated to prevent or limit it
Black, iron oxide red, zinc oxide etc., light absorbs type can consumingly selective absorbing ultraviolet, be converted into harmless low-energy radiation；Such as
Benzophenone, benzotriazole compound etc..
Refer to shown in Fig. 1, the technical solution adopted by the present invention is：A kind of rubber catheter lock ring, the rubber catheter lock
The preparation method of ring is as follows：
1) is added to pulverizer after the rubber catheter lock ring raw material of the parts by weight in claim 1 are cleaned
In, carry out being crushed to certain fineness；
2) material after pulverizer crushes that obtains step 1 is transferred to microwave high-temperature in microwave reaction kettle and reacted,
And reacted fluid is filtered；
3) material after the filtering that obtains step 2 is transferred to kneader, sets mixing speed to be arranged to 40~80r/
Min, open kneader and carry out kneading stirring；
4) material after stirring is mediated in step 3 is transferred in extruder by, after setting extrusion temperature, and is mixed
Extruding；
5) material after extruding is mixed in step 4 is transferred in pressing machine by, and pressing and forming is carried out by pressing machine；
6) material after pressing and forming in step 5 is transferred in cutter by, and qualified rubber is cut into by cutter
Conduit lock ring.
Further, the fineness that the raw material in the preparation method step 1 of the rubber catheter lock ring crush is 30~100
Mesh.
Further, the temperature in the preparation method step 3 of the rubber catheter lock ring in kneader is 80~250 DEG C,
The time of the kneading stirring of the preparation method step 3 of the rubber catheter lock ring is 3~10h.
Further, the temperature in the extruder in the preparation method step 4 of the rubber catheter lock ring is 150~250
℃。
Further, the rubber pulverizing in the preparation method step 1 of the rubber catheter lock ring uses normal temperature crushing up, powder
Broken machine is arranged to carry groove roller and the ditch smooth roll pulverizer without fluted roller.
In the present invention, rational raw material selection, rational raw material ratio are made in rubber catheter lock ring of the present invention
The rubber catheter lock ring obtained, on the basis of original technology achievement, by innovating again, its all technical is set to meet that client will
Ask, and possess oil resistant, high temperature resistant, twisting resistance performance, can further develop respective series product, extend Products chain, and
And disclosure satisfy that client's requirement, accomplish scale production, cost of implementation is controllable, thus the present invention has stronger market competing
Strive advantage.
Although an embodiment of the present invention has been shown and described, for the ordinary skill in the art, can be with
A variety of changes, modification can be carried out to these embodiments, replace without departing from the principles and spirit of the present invention by understanding
And modification, the scope of the present invention is defined by the appended.
Claims (10)
- A kind of 1. rubber catheter lock ring, it is characterised in that：The rubber catheter lock ring includes the material of following parts by weight：EPDM rubbers：80~120 parts；Pre-process white carbon QCR：5~25 parts；Pre-process diatomite TP-80：50~100 parts；Silane coupler KC-85：3~8 parts；High-flash paraffin oil NP330：10~40 parts；Auxiliary curing agent：3~20 parts；Vulcanizing agent：0.3~3 part；Accelerator：2.8~17 parts；Age resistor CPL：0.5~5 part；Dispersant TL-80：0.5~5 part；Ultraviolet screener SORP：0.5~2 part.
- 2. rubber catheter lock ring according to claim 1, it is characterised in that：Helping in the rubber catheter lock ring raw material Accelerator is arranged to zinc oxide.
- 3. rubber catheter lock ring according to claim 1, it is characterised in that：Vulcanize in the rubber catheter lock ring raw material Agent is arranged to sulphur.
- 4. rubber catheter lock ring according to claim 1, it is characterised in that：Promote in the rubber catheter lock ring raw material Agent includes accelerator CBS, accelerant MBT S, accelerator TBZTD and accelerant C LD.
- 5. rubber catheter lock ring according to claim 4, it is characterised in that：Promote in the rubber catheter lock ring raw material The number that accelerator CBS, accelerant MBT S, accelerator TBZTD and accelerant C LD in agent account for total raw material is arranged to accelerator CBS：0.3~3 part, accelerant MBT S：1~5 part, accelerator TBZTD：0.5~4 part and accelerant C LD：1~5 part.
- 6. rubber catheter lock ring according to claim 1, it is characterised in that：The preparation method of the rubber catheter lock ring is such as Under：1) is added in pulverizer after the rubber catheter lock ring raw material of the parts by weight in claim 1 are cleaned, and is entered Row is crushed to certain fineness；2) material after pulverizer crushes that obtains step 1 is transferred to microwave high-temperature in microwave reaction kettle and reacted, and will Reacted fluid is filtered；3) material after the filtering that obtains step 2 is transferred to kneader, sets mixing speed to be arranged to 40~80r/min, opens Open kneader and carry out kneading stirring；4) material after stirring is mediated in step 3 is transferred in extruder by, after setting extrusion temperature, and carries out mixing extruding；5) material after extruding is mixed in step 4 is transferred in pressing machine by, and pressing and forming is carried out by pressing machine；6) material after pressing and forming in step 5 is transferred in cutter by, and qualified rubber catheter is cut into by cutter Lock ring.
- 7. rubber catheter lock ring according to claim 6, it is characterised in that：The preparation method step of the rubber catheter lock ring The fineness that raw material in rapid 1 crush is 30~100 mesh.
- 8. rubber catheter lock ring according to claim 6, it is characterised in that：The preparation method step of the rubber catheter lock ring Temperature in rapid 3 in kneader is 80~250 DEG C, the kneading stirring of the preparation method step 3 of the rubber catheter lock ring when Between be 3~10h.
- 9. rubber catheter lock ring according to claim 6, it is characterised in that：The preparation method step of the rubber catheter lock ring The temperature in extruder in rapid 4 is 150~250 DEG C.
- 10. rubber catheter lock ring according to claim 6, it is characterised in that：The preparation method of the rubber catheter lock ring Rubber pulverizing in step 1 uses normal temperature crushing up, and pulverizer is arranged to carry groove roller and the ditch smooth roll without fluted roller Pulverizer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710687662.4A CN107383635A (en) | 2017-08-11 | 2017-08-11 | A kind of rubber catheter lock ring |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710687662.4A CN107383635A (en) | 2017-08-11 | 2017-08-11 | A kind of rubber catheter lock ring |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN107383635A true CN107383635A (en) | 2017-11-24 |
Family
ID=60354866
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710687662.4A Pending CN107383635A (en) | 2017-08-11 | 2017-08-11 | A kind of rubber catheter lock ring |
Country Status (1)
| Country | Link |
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| CN (1) | CN107383635A (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102061035A (en) * | 2010-06-23 | 2011-05-18 | 上海长宁橡胶制品厂 | Non-halogen fire resistant cable sheath material and production method thereof |
| CN103254518A (en) * | 2013-06-08 | 2013-08-21 | 武汉科能电气有限公司 | Electric insulating rubber and fabrication method thereof |
| CN103910944A (en) * | 2014-04-10 | 2014-07-09 | 扬中市宏辉橡胶制品有限公司 | Rubber fastener for automobile air conditioner pipe and manufacturing method of rubber fastener |
| CN106479065A (en) * | 2015-08-27 | 2017-03-08 | 德州合力佳橡塑制品有限公司 | Door of washing machine special sealing ring |
| CN106957462A (en) * | 2017-05-09 | 2017-07-18 | 广德天运新技术股份有限公司 | A kind of utilization waste old production prevents the damping sheets of resonance |
-
2017
- 2017-08-11 CN CN201710687662.4A patent/CN107383635A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102061035A (en) * | 2010-06-23 | 2011-05-18 | 上海长宁橡胶制品厂 | Non-halogen fire resistant cable sheath material and production method thereof |
| CN103254518A (en) * | 2013-06-08 | 2013-08-21 | 武汉科能电气有限公司 | Electric insulating rubber and fabrication method thereof |
| CN103910944A (en) * | 2014-04-10 | 2014-07-09 | 扬中市宏辉橡胶制品有限公司 | Rubber fastener for automobile air conditioner pipe and manufacturing method of rubber fastener |
| CN106479065A (en) * | 2015-08-27 | 2017-03-08 | 德州合力佳橡塑制品有限公司 | Door of washing machine special sealing ring |
| CN106957462A (en) * | 2017-05-09 | 2017-07-18 | 广德天运新技术股份有限公司 | A kind of utilization waste old production prevents the damping sheets of resonance |
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Application publication date: 20171124 |
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