CN105482447A - Highly-wear-resistant plastic sheave liner and preparation method thereof - Google Patents
Highly-wear-resistant plastic sheave liner and preparation method thereof Download PDFInfo
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- CN105482447A CN105482447A CN201511011234.7A CN201511011234A CN105482447A CN 105482447 A CN105482447 A CN 105482447A CN 201511011234 A CN201511011234 A CN 201511011234A CN 105482447 A CN105482447 A CN 105482447A
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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
- C08L77/00—Compositions of polyamides obtained by reactions forming a carboxylic amide link in the main chain; Compositions of derivatives of such polymers
- C08L77/02—Polyamides derived from omega-amino carboxylic acids or from lactams thereof
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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
- C08K2201/001—Conductive additives
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2201/00—Properties
- C08L2201/02—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
- C08L2201/04—Antistatic
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2205/00—Polymer mixtures characterised by other features
- C08L2205/02—Polymer mixtures characterised by other features containing two or more polymers of the same C08L -group
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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
- C08L2205/14—Polymer mixtures characterised by other features containing polymeric additives characterised by shape
- C08L2205/16—Fibres; Fibrils
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Abstract
The invention discloses a highly-wear-resistant plastic sheave liner and a preparation method thereof. The liner consists of the following components in parts by weight: 100 parts of nylon, 10-20 parts of aramid fiber, 15-20 parts of hollow glass beads, 5-15 parts of bauxite, 5-15 parts of barite, 1-3 parts of magnesium stearate, 0.5-1.5 parts of a titanate coupling agent, 10-15 parts of dioctyl phthalate, 1-3 parts of antimony trioxide, 5-10 parts of decabromodiphenyl ether, 10-15 parts of conductive carbon black and 0.5-1.5 parts of an antioxidant. The preparation process is simple, and the prepared plastic liner has good antistatic and flame-retardant properties, can keep relatively high tensile property, and is long in service life; and the sheave liner is good in seasoning crack resistance and moisture resistance, and is particularly suitable for use in severe environments with sprinkling water, strong corrosivity and the like in mines.
Description
Technical field
The present invention relates to plastic material technical field, be specifically related to a kind of high abrasion plastics head sheave liner and preparation method thereof.
Background technology
Head sheave is the wireline guidance system of lift routine, its role is to: in lifting and operational process, change wireline direction of motion.So inevitably need and wireline long term, because lift is in operation process, wireline and wheel body intermolecular forces larger, if do not add protection, severe friction will be produced between wireline and metallic wheel body, not only have a strong impact on service life of steel wire rope, and the steel rope fault phenomenon caused during wearing and tearing more impacts to the operating safety of lift.The effect of head sheave liner be just by wireline and metallic wheel body spaced apart, prevent wireline from directly contacting with metallic wheel body, and then play the object of protection wireline.
Through development for many years, the domestic head sheave pad having developed various material, different size at present, and be widely used in the mine such as coal, metallurgy single rope winding hoist head sheave, multi-rope friction hoisting machine guide deflection sheave, and similar, utilize head sheave, guide deflection sheave to change on the lift technique in wireline direction.The pad that domestic market circulates mainly contains following material: rubber, PVC, PP and ultrahigh molecular weight polyethylene(UHMWPE) etc.; Adopt wooden head sheave liner in addition, because wooden choice requirement is higher, in-situ processing grooving difficulty, work-ing life is short, causes and changes timber lining frequently, therefore, adopt plastics lining board to substitute wooden liner plate and become the problem needing solution badly, on the other hand, mining plastic prod requires antistatic and fire-retardant performance, needs a kind of plastic gasket of flame-retardant and anti-static to substitute existing wooden dunnage.
Wherein, low-end product is based on PP, PVC pad, these two kinds of material pads with cheap price and good wear resistance for be applied to head sheave, guide deflection sheave the earliest, but the life cycle of PP, PVC pad is short, the drawbacks such as the wearing no resistance of PVC pad, contaminate environment more and more not accept by people, make it apply and be subject to increasing restriction, gradually can not meet the needs that production application is improved in domestic mine day by day; Putting before this, the middle level products that it is representative that domestic main factory has developed with CPUR pad.Wherein, though CPUR pad has good installation and wear resisting property, the product ageing-resistant time is short, and the mode of production falls behind, and quality is unstable.
Summary of the invention
The present invention, in order to solve the problems of the technologies described above, provide a kind of high abrasion plastics head sheave liner and preparation method thereof, has high-wearing feature and weathering resistance.
The present invention for the adopted technical scheme that solves the problem is: a kind of high abrasion plastics head sheave liner, is made up of the raw material of following parts by weight: nylon 100 parts, aramid fiber 10 ~ 20 parts, hollow glass microbead 15 ~ 20 parts, bauxitic clay 5 ~ 15 parts, 5 ~ 15 parts, barite, Magnesium Stearate 1 ~ 3 part, titanate coupling agent 0.5 ~ 1.5 part, dioctyl phthalate (DOP) 10 ~ 15 parts, antimonous oxide 1 ~ 3 part, decabromodiphenyl oxide 5 ~ 10 parts, graphitized carbon black 10 ~ 15 parts and 0.5 ~ 1.5 part, oxidation inhibitor.
In the present invention, described nylon is polycaprolactam.
In the present invention, described Magnesium Stearate is chemical pure.In described barite, BaSO
4>=90%, Fe≤0.05%, its median size is 10 ~ 12 microns.
A preparation method for high abrasion plastics head sheave liner, comprises the following steps: step one, take each raw material according to described parts by weight, for subsequent use;
Step 2, the barite taken and Magnesium Stearate are added in homogenizer, at 30 ~ 50 DEG C of temperature, stir 10min, then hollow glass microbead, bauxitic clay and titanate coupling agent is added, 10 ~ 12min is stirred, obtained compound A under equal temperature, for subsequent use;
Step 3, in the mixture A of homogenizer, add the aramid fiber, antimonous oxide, decabromodiphenyl oxide (fire retardant), graphitized carbon black, dioctyl phthalate (DOP) (fluidizer) and the oxidation inhibitor that take successively, at 30 ~ 50 DEG C of temperature, stir 20 ~ 30min, then nylon is added, 10min is stirred under equal temperature, obtained mixture B, for subsequent use;
Step 4, mixture B is added in screw pelletizer, at the temperature of 220 ~ 240 DEG C, carry out granulation, obtained plastic melt, plastic melt is injected in mould by injection moulding machine, cooling, the demoulding, burr removal, obtain head sheave liner.
Introduce aramid fiber in the present invention, nylon and aramid fiber have good thermodynamic compatibility, can promote shock-resistance and the cold resistance energy of plastics.Wherein, containing a small amount of TiO in the bauxitic clay of interpolation
2and the calcium magnesium of trace and alkaline earth metal oxide, when granulation, a small amount of liquid phase can be produced, reduce sintering temperature, and the barite added can generate low melting point eutectic with alkaline earth metal oxide, make just have liquid phase to produce at a lower temperature, wetting corundum crystal, obtains fine and close plastics.
The hollow glass microbead that the present invention adds is carried out modification by titanate coupling agent, and hollow glass microbead specific surface area is large, large with other component contacts areas, and when plastic gasket is subject to external impacts, hollow glass microbead can apparatus with shock absorbing; Meanwhile, modification hollow glass microbead and Magnesium Stearate improve the mobility of material, improve because adding barite, bauxitic clay to the impact of viscosity of plastic melts.And, the graphitized carbon black added, antimonous oxide, decabromodiphenyl oxide can play cooperative flame retardant effect, wherein, graphitized carbon black can be filled in the space between hollow glass microbead, enhance the density of material, gas can not be freed in and out, and heat cannot free exchange, improves the fire-retardant of material and antistatic property.
Containing the multiple of bonding such as carbonyl, alkyl in the molecular structure of nylon, oxidizing reaction is there occurs in friction process, the mechanical property on nylon surface is reduced, abrasion loss is finally caused to increase, and the aluminum oxide in bauxitic clay shows as nano-scale in the material, improve shock strength and the wear resistance of material.The present invention adds aramid fiber in nylon, reduces the density of product, greatly alleviates product weight; Creep is little, and elongation is low, good stability of the dimension.
Beneficial effect: 1, the present invention utilizes aramid fiber to strengthen thermosetting material nylon, thermosetting material interior tissue gap is little, intermolecular existence is cross-linked, aramid fiber improves the chemical stability of nylon, expands the use temperature scope of plastic gasket, makes it under very low temperature, not produce embrittlement, and, decrease the loss of fiber in wear process, make liner form thicker transfer film in adhesive wear process, friction and wearing properties improves.
2, the present invention utilizes in thermosetting material, add modification barite, hollow glass microbead and bauxitic clay, can at liner and wireline to when grinding, transfer film is being produced to mill metallic surface, improve the wear resistance of liner, the synergy that three is common, both reduce the abrasion loss of liner, improve surface hardness, turn improve impact strength.Meanwhile, the hollow glass fibre of interpolation can break and layering by trace on interface, can fetter the motion of macromolecular interchain, places large-area band shape wearing and tearing.
3, preparation technology of the present invention is simple, and obtained plastic gasket has good antistatic, flame retardant properties, and can keep higher tensile properties, high life; Head sheave liner anti-dry and cracked, moisture-resistance good, use under being especially adapted to the severe environment such as mine trickle is crossed, corrodibility is strong.
Embodiment
Below in conjunction with specific embodiment, high abrasion plastics head sheave liner of the present invention and preparation method thereof is described further, can better understand the present invention to make those skilled in the art and can be implemented, but illustrated embodiment is not as a limitation of the invention.
A kind of high abrasion plastics head sheave liner, is made up of the raw material of following parts by weight: nylon 100 parts, aramid fiber 10 ~ 20 parts, hollow glass microbead 15 ~ 20 parts, bauxitic clay 5 ~ 15 parts, 5 ~ 15 parts, barite, Magnesium Stearate 1 ~ 3 part, titanate coupling agent 0.5 ~ 1.5 part, dioctyl phthalate (DOP) 10 ~ 15 parts, antimonous oxide 1 ~ 3 part, decabromodiphenyl oxide 5 ~ 10 parts, graphitized carbon black 10 ~ 15 parts and 0.5 ~ 1.5 part, oxidation inhibitor.
Embodiment 1
A preparation method for high abrasion plastics head sheave liner, comprises the following steps:
Step one, take each raw material according to described parts by weight: nylon 100 parts, aramid fiber 20 parts, hollow glass microbead 15 parts, bauxitic clay 10 parts, 8 parts, barite, Magnesium Stearate 1.5 parts, titanate coupling agent 1.5 parts, dioctyl phthalate (DOP) 12 parts, antimonous oxide 2 parts, decabromodiphenyl oxide 10 parts, graphitized carbon black 10 parts and 1.3 parts, oxidation inhibitor, for subsequent use;
Step 2, the barite taken and Magnesium Stearate are added in homogenizer, at 45 DEG C of temperature, stir 10min, then add hollow glass microbead, bauxitic clay and titanate coupling agent, at 45 DEG C, stir 12min, obtained compound A, for subsequent use;
Step 3, in the mixture A of homogenizer, add the aramid fiber, antimonous oxide, decabromodiphenyl oxide, graphitized carbon black, dioctyl phthalate (DOP) and the oxidation inhibitor that take successively, at 50 DEG C of temperature, stir 30min, then nylon is added, 10min is stirred at 50 DEG C, obtained mixture B, for subsequent use;
Step 4, mixture B is added in screw pelletizer, at the temperature of 240 DEG C, carry out granulation, obtained plastic melt, plastic melt is injected in mould by injection moulding machine, cooling, the demoulding, burr removal, obtain head sheave liner.
Embodiment 2
A preparation method for high abrasion plastics head sheave liner, is characterized in that, comprise the following steps:
Step one, take each raw material according to described parts by weight: nylon 100 parts, aramid fiber 10 parts, hollow glass microbead 20 parts, bauxitic clay 15 parts, 5 parts, barite, Magnesium Stearate 3 parts, titanate coupling agent 0.5 part, dioctyl phthalate (DOP) 15 parts, antimonous oxide 3 parts, decabromodiphenyl oxide 5 parts, graphitized carbon black 15 parts and 0.5 part, oxidation inhibitor, for subsequent use;
Step 2, the barite taken and Magnesium Stearate are added in homogenizer, at 30 DEG C of temperature, stir 10min, then add hollow glass microbead, bauxitic clay and titanate coupling agent, at 30 DEG C, stir 11min, obtained compound A, for subsequent use;
Step 3, in the mixture A of homogenizer, add the aramid fiber, antimonous oxide, decabromodiphenyl oxide, graphitized carbon black, dioctyl phthalate (DOP) and the oxidation inhibitor that take successively, at 45 DEG C of temperature, stir 25min, then nylon is added, 10min is stirred at 45 DEG C, obtained mixture B, for subsequent use;
Step 4, mixture B is added in screw pelletizer, at the temperature of 235 DEG C, carry out granulation, obtained plastic melt, plastic melt is injected in mould by injection moulding machine, cooling, the demoulding, burr removal, obtain head sheave liner.
Embodiment 3
A preparation method for high abrasion plastics head sheave liner, is characterized in that, comprise the following steps:
Step one, take each raw material according to described parts by weight: polycaprolactam 100 parts, aramid fiber 17 parts, hollow glass microbead 16 parts, bauxitic clay 5 parts, 15 parts, barite, Magnesium Stearate 1 part, titanate coupling agent 1.3 parts, dioctyl phthalate (DOP) 10 parts, antimonous oxide 1 part, decabromodiphenyl oxide 8 parts, graphitized carbon black 13 parts and 1.5 parts, oxidation inhibitor, for subsequent use;
Step 2, the barite taken and Magnesium Stearate are added in homogenizer, at 50 DEG C of temperature, stir 10min, then add hollow glass microbead, bauxitic clay and titanate coupling agent, at 50 DEG C of temperature, stir 10min, obtained compound A, for subsequent use;
Step 3, in the mixture A of homogenizer, add the aramid fiber, antimonous oxide, decabromodiphenyl oxide, graphitized carbon black, dioctyl phthalate (DOP) and the oxidation inhibitor that take successively, at 30 DEG C of temperature, stir 20min, then nylon is added, 10min is stirred at 30 DEG C of temperature, obtained mixture B, for subsequent use;
Step 4, mixture B is added in screw pelletizer, at the temperature of 220 DEG C, carry out granulation, obtained plastic melt, plastic melt is injected in mould by injection moulding machine, cooling, the demoulding, burr removal, obtain head sheave liner.
Carry out performance test to the obtained head sheave liner of embodiment 1 ~ 3, test structure is: the density of embodiment 1 head sheave liner is 0.97g/cm
3, shore hardness 85H
d; The density of embodiment 2 head sheave liner is 0.95g/cm
3, shore hardness 85H
d; The density of embodiment 3 head sheave liner is 0.95g/cm
3, shore hardness 87H
d.The head sheave liner of embodiment 1 ~ 3 is used for coal single rope winding hoist head sheave test, the existing rubber gasket be fixedly mounted in head sheave is utilized to carry out same test in addition, find through contrast in 24 months, the abrasion loss of head sheave liner of the present invention and wireline contact surface is 1 ~ 1.2mm, is 2 ~ 3.3mm with the abrasion loss of sky rim of wheel contact surface; The abrasion loss of existing rubber gasket and wireline contact surface is 8mm, is 12.2mm with the abrasion loss of sky rim of wheel contact surface, and head sheave liner of the present invention has high-wearing feature and high-dimensional stability, can improve the economic benefit of enterprise.
In actual applications, head sheave liner is also had to the requirement of flame-retardant and anti-static, carry out surface resistivity monitoring to the head sheave liner of the embodiment of the present invention 1 ~ 3 and find, upper and lower surface resistance mean value is 0.8 × 10
4Ω; Carry out alcohol blast burner combustion test, three's flaming combustion time average is 1.12s, and flaming combustion time maximum value is 1.3s, and glowing time mean value is 0.4s, and glowing time maximum value is 0.5s, and flame spread maximum length is 98mm; Carry out spirit lamp combustion test, three's flaming combustion time average is 1.19s, and flaming combustion time maximum value is 1.38s, and glowing time mean value is 0.42s, and glowing time maximum value is 0.52s, and flame spread maximum length is 102mm.The head sheave liner of the embodiment of the present invention 1 ~ 3 has higher flame-retardant and anti-static performance.
Claims (5)
1. a high abrasion plastics head sheave liner, is characterized in that: be made up of the raw material of following parts by weight: nylon 100 parts, aramid fiber 10 ~ 20 parts, hollow glass microbead 15 ~ 20 parts, bauxitic clay 5 ~ 15 parts, 5 ~ 15 parts, barite, Magnesium Stearate 1 ~ 3 part, titanate coupling agent 0.5 ~ 1.5 part, dioctyl phthalate (DOP) 10 ~ 15 parts, antimonous oxide 1 ~ 3 part, decabromodiphenyl oxide 5 ~ 10 parts, graphitized carbon black 10 ~ 15 parts and 0.5 ~ 1.5 part, oxidation inhibitor.
2. a kind of high abrasion plastics head sheave liner according to claim 1, is characterized in that: described nylon is polycaprolactam.
3. a kind of high abrasion plastics head sheave liner according to claim 1, is characterized in that: described Magnesium Stearate is chemical pure.
4. a kind of high abrasion plastics head sheave liner according to claim 1, is characterized in that: in described barite, BaSO
4>=90%, Fe≤0.05%, its median size is 10 ~ 12 microns.
5. the preparation method of a kind of high abrasion plastics head sheave liner according to claim 1, is characterized in that, comprise the following steps:
Step one, take each raw material according to described parts by weight, for subsequent use;
Step 2, the barite taken and Magnesium Stearate are added in homogenizer, at 30 ~ 50 DEG C of temperature, stir 10min, then hollow glass microbead, bauxitic clay and titanate coupling agent is added, 10 ~ 12min is stirred, obtained compound A under equal temperature, for subsequent use;
Step 3, in the mixture A of homogenizer, add the aramid fiber, antimonous oxide, decabromodiphenyl oxide, graphitized carbon black, dioctyl phthalate (DOP) and the oxidation inhibitor that take successively, at 30 ~ 50 DEG C of temperature, stir 20 ~ 30min, then nylon is added, 10min is stirred under equal temperature, obtained mixture B, for subsequent use;
Step 4, mixture B is added in screw pelletizer, at the temperature of 220 ~ 240 DEG C, carry out granulation, obtained plastic melt, plastic melt is injected in mould by injection moulding machine, cooling, the demoulding, burr removal, obtain head sheave liner.
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| CN201511011234.7A CN105482447B (en) | 2015-12-30 | 2015-12-30 | A kind of preparation method of high abrasion plastics head sheave pad |
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| CN201511011234.7A CN105482447B (en) | 2015-12-30 | 2015-12-30 | A kind of preparation method of high abrasion plastics head sheave pad |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107189340A (en) * | 2017-07-10 | 2017-09-22 | 清远芬乐桑拿泳池设备有限公司 | One planting sand cylinder head point waterleaf structure |
| CN109664209A (en) * | 2018-12-20 | 2019-04-23 | 张江元 | A kind of grinding stone |
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| CN102504528A (en) * | 2011-10-21 | 2012-06-20 | 奇瑞汽车股份有限公司 | Hollow glass microsphere-filled fiber-reinforced nylon composite material and preparation method thereof |
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