CN110054814A - A kind of India rubber wipes the preparation method of material - Google Patents
A kind of India rubber wipes the preparation method of material Download PDFInfo
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- CN110054814A CN110054814A CN201910362102.0A CN201910362102A CN110054814A CN 110054814 A CN110054814 A CN 110054814A CN 201910362102 A CN201910362102 A CN 201910362102A CN 110054814 A CN110054814 A CN 110054814A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29B—PREPARATION OR PRETREATMENT OF THE MATERIAL TO BE SHAPED; MAKING GRANULES OR PREFORMS; RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIAL CONTAINING PLASTICS
- B29B7/00—Mixing; Kneading
- B29B7/02—Mixing; Kneading non-continuous, with mechanical mixing or kneading devices, i.e. batch type
- B29B7/06—Mixing; Kneading non-continuous, with mechanical mixing or kneading devices, i.e. batch type with movable mixing or kneading devices
- B29B7/10—Mixing; Kneading non-continuous, with mechanical mixing or kneading devices, i.e. batch type with movable mixing or kneading devices rotary
- B29B7/18—Mixing; Kneading non-continuous, with mechanical mixing or kneading devices, i.e. batch type with movable mixing or kneading devices rotary with more than one shaft
- B29B7/20—Mixing; Kneading non-continuous, with mechanical mixing or kneading devices, i.e. batch type with movable mixing or kneading devices rotary with more than one shaft with intermeshing devices, e.g. screws
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29B—PREPARATION OR PRETREATMENT OF THE MATERIAL TO BE SHAPED; MAKING GRANULES OR PREFORMS; RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIAL CONTAINING PLASTICS
- B29B7/00—Mixing; Kneading
- B29B7/02—Mixing; Kneading non-continuous, with mechanical mixing or kneading devices, i.e. batch type
- B29B7/22—Component parts, details or accessories; Auxiliary operations
- B29B7/28—Component parts, details or accessories; Auxiliary operations for measuring, controlling or regulating, e.g. viscosity control
-
- 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
- B29C35/00—Heating, cooling or curing, e.g. crosslinking or vulcanising; Apparatus therefor
- B29C35/02—Heating or curing, e.g. crosslinking or vulcanizing during moulding, e.g. in a mould
-
- 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
- B29C51/00—Shaping by thermoforming, i.e. shaping sheets or sheet like preforms after heating, e.g. shaping sheets in matched moulds or by deep-drawing; Apparatus therefor
- B29C51/26—Component parts, details or accessories; Auxiliary operations
- B29C51/46—Measuring, controlling or regulating
-
- 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
- B29C69/00—Combinations of shaping techniques not provided for in a single one of main groups B29C39/00 - B29C67/00, e.g. associations of moulding and joining techniques; Apparatus therefore
- B29C69/02—Combinations of shaping techniques not provided for in a single one of main groups B29C39/00 - B29C67/00, e.g. associations of moulding and joining techniques; Apparatus therefore of moulding techniques only
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B43—WRITING OR DRAWING IMPLEMENTS; BUREAU ACCESSORIES
- B43L—ARTICLES FOR WRITING OR DRAWING UPON; WRITING OR DRAWING AIDS; ACCESSORIES FOR WRITING OR DRAWING
- B43L19/00—Erasers, rubbers, or erasing devices; Holders therefor
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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
- C08L9/00—Compositions 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
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L91/00—Compositions of oils, fats or waxes; Compositions of derivatives 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
- C08K2201/014—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
- C08L2205/00—Polymer mixtures characterised by other features
- C08L2205/03—Polymer mixtures characterised by other features containing three or more polymers in a blend
- C08L2205/035—Polymer mixtures characterised by other features containing three or more polymers in a blend containing four or more polymers in a blend
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2207/00—Properties characterising the ingredient of the composition
- C08L2207/04—Thermoplastic elastomer
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Abstract
The present invention relates to the preparation methods that a kind of India rubber wipes material, belong to stationery sports goods field of material technology.The present invention uses mechanical blending method thermoplastic polyurethane elastomer modified styrene butadiene rubber, and butadiene rubber and modified styrene butadiene rubber is used to be blended as raw material, in conjunction with auxiliary agents such as plasticiser epoxidized soybean oil, filler material white carbon black, stabilizer, lubricants, a kind of India rubber wiping material is prepared by hot-forming；Polyurethane hardness height and high resilience, with good mechanical strength, oil resistant, ozone resistance, excellent cryogenic property etc., with thermoplastic polyurethane elastomer modified styrene butadiene rubber, so that modified butadiene-styrene rubber has the elasticity of polyurethane elastomer, butadiene rubber has the characteristics that elastic height, wearability is good, cold resistance is good, heat is low, flexible resistance and dynamic property are good, it is blended with butadiene rubber and modified styrene butadiene rubber, so that the erasing rubber material of preparation has good elasticity, the case where avoiding the occurrence of fracture in use.
Description
Technical field
The present invention relates to the preparation methods that a kind of India rubber wipes material, belong to stationery sports goods field of material technology.
Background technique
Erasing rubber (English: eraser (beauty), rubber (English, Australia)), also known as rubber, rubber, wipe paper glue, rubber erasers at rubber erasers
Cloth, wiper, eraser, to wipe pencil away in the stationery of ink marks on paper.Their how white, browns or pink, but with new
Raw material occurs, and present erasing rubber can be any color.The main composition material of erasing rubber is rubber.Some prices are higher
Erasing rubber then contains plastic cement composition.Wipe apparatus commonly referred to as painting or (black) plate of chalk or blank person's handwriting.Rubber now
Wipe it is many kinds of, to suit different needs.The tail portion of some pencils is equipped with a slight erasing rubber.These erasing rubbers are mostly powder
Red, surface is smooth colloid.They have good performance in most occasion, but can also make paper dirty sometimes.If
Power is too heavy, and erasing rubber also has an opportunity to stave paper.After person's handwriting is wiped, erasing rubber can leave residue on paper.If cleaning
It is not good at, these residues can leave a trace on paper.Another erasing rubber is the common brown erasing rubber of artist, thick with softness
Rough rubber is made.Its design is convenient to the trace of erasing large area, and will not stave paper.But this erasing rubber is not
Person's handwriting can effectively and accurately be wiped very much.
Erasing rubber, is many sketch drawing, and it is wrong to be mainly used for wiping for one of the stationery of kindergarten and pupil's indispensability
Accidentally lines and wrong person's handwriting, the main component of erasing rubber is plastics, by adding various industrial chemicals and natural flavor system
Made of standby, when in use, due to frequency of use height, consumption is also bigger, and traditional erasing rubber is when in use for erasing rubber
Due to its formula and the defect of preparation process, loss is very fast, and elasticity is also relatively poor, careless slightly, just will appear disconnected
It splits, influences using use cost is also opposite to be improved.
The use of erasing rubber brings many convenience to the work of people, and therefore, it is indispensable that erasing rubber becomes people
Articles.Earliest erasing rubber is made of natural rubber, does not fall clast when wiping word, is completed by the way that pencil end is sticked on erasing rubber
Disappear word, and therefore, the erasing rubber of natural rubber preparation often the more is wiped the more dirty.
It is usually flexible PVC that plastic eraser, which is wiped, and appearance is usually net in vain, feels very fine and smooth appearance, is wiped
Exfoliation is usually that a rule can stick up；Rubber rubber wipes majority and seems that color is somewhat deep, feels somewhat coarse, falls
Bits are usually smaller and at random particle.Earliest erasing rubber mainly uses rubber production, and with plastics, i.e., plastic eraser wiping is
It is primary raw material that polyvinyl chloride (PVC), which is primary raw material, passes through extrusion molding.Due to technique, raw material, plastic eraser
Can be made monochromatic, polychrome, the plastic eraser of casper more liked by student its main feature is that wipe word have excellent performance, user
Just.The erasing rubber that rubber is done is cross-linked structure, is solid netted molecular structure, and wearability is higher than plastics, and elasticity is higher than plastics,
More suitable for making erasing rubber.The erasing rubber that plastics are done is linear molecular structure, and what is leaned on is the active force offer between molecule
Intensity, it is harder, it is therefore desirable to be added a large amount of plasticizer softened (such as flexible PVC) make erasing rubber, feature is to compare rubber
Glue is cheap, and the processing is simple, but wearability and elasticity are poorer than rubber.Some certain plastics, such as polyurethane, are added without plasticizer just
It can provide wear-resisting and elastic, but price is more expensive than rubber.TPR erasing rubber material main component is SEBS rubber, inorganic fill
Powder and softening oil (environmental protection).
Traditional erasing rubber constituent includes Corvic, calcium carbonate, dibutyl phthalate and stearic acid
Zinc.Wherein, erasing rubber made by the material based on polyvinyl chloride because it is interior containing chlorine element due to be unfavorable for recycling, and O-phthalic
The popular name of dibutyl phthalate is plasticiser, has been found that canceration can be caused, and underage child is easy to eat erasing rubber by mistake because of curiosity,
Security risk is caused to health.The eraser composition that Chinese Patent Application No. is 200310103698.1, it includes heat
Thermoplastic elastic, polyene hydroxyl system macromolecule, inorganic filler and some organic additives, wherein thermoplastic elastomer content
Between 15~88%, for polyene hydroxyl system macromolecule content between 1~8%, inorganic filler content is organic between 0.1~74%
The content of additive is between 10~50%.In the disclosure in this patent, in order to enhance the mould shrinking percentage of thermoplastic elastomer (TPE),
Convenient for injection molding, the polyene hydroxyl system macromolecule of more amount is increased in raw material filler, system is high molecular due to polyene hydroxyl
Softening temperature and melting temperature are higher, and the thermal stability in material filler is poor, and auxiliary agent is easy to decompose and bubble phenomenon occur, separately
Outside, erasing rubber molding mutability trichorrhexis is hard.
Now major part erasing rubber be made of using PVC material, although this kind of erasing rubber material erasing rate significantly improves,
It is that PVC can generate pernicious gas in process, waste product difficult to degrade is difficult, and additive can volatilize in use
Out, it does harm to huamn body.Therefore, current common erasing rubber material is difficult to take into account the problem of high erasing rate and environmental protection.
Summary of the invention
The technical problems to be solved by the invention: it is relatively poor for traditional erasing rubber elasticity, it is careless slightly, it will go out
The problem of being now broken provides a kind of preparation method of India rubber wiping material.
In order to solve the above technical problems, the technical solution adopted by the present invention is that:
(1) thermoplastic polyurethane elastomer, butadiene-styrene rubber, white carbon black are taken, thermoplastic polyurethane elastomer and butadiene-styrene rubber are mixed
Conjunction is placed in mixer, and white carbon black is added to get mixture A in mixing processing in mixture A, continues 10~20min of mixing,
Up to mixture B, mixture B is placed in vulcanizing press, after the pre-heat treatment, hot-pressing processing is cooled to room temperature to get modification
Butadiene-styrene rubber；
(2) take modified styrene butadiene rubber, butadiene rubber, plasticiser epoxidized soybean oil, filler material white carbon black, stabilizer calcium stearate,
Modified styrene butadiene rubber and butadiene rubber are mixed and are placed in mixer by lubricant silicone oil, and blending and stirring is handled to get mixture C,
Plasticiser epoxidized soybean oil, filler material white carbon black, stabilizer calcium stearate and lubricant silicone oil are added in mixture C, continues
Stir process is to get presoma material；
(3) presoma material is placed in extruding pelletization in double screw extruder and matrix material is placed in mold to get matrix material
In, hot-pressing processing is cooled to room temperature and wipes material to get India rubber.
Thermoplastic polyurethane elastomer described in step (1), butadiene-styrene rubber, the ratio between white carbon black are respectively as follows: by weight
Number meter is measured, weighs 50~60 parts of thermoplastic polyurethane elastomer, 20~30 parts of butadiene-styrene rubber, 1~5 part of white carbon black respectively.
Mixing processing step described in step (1) are as follows: be placed in thermoplastic polyurethane elastomer and butadiene-styrene rubber mixing close
It is 160~170 DEG C in temperature, mixing speed is 6~10min of mixing under 300~500r/min in mill.
The pre-heat treatment step described in step (1) are as follows: mixture B is placed in vulcanizing press, temperature be 160~
10~15min is preheated at 170 DEG C.
Autoclave steps described in step (1) are as follows: temperature be 160~170 DEG C, pressure be 15~20MPa under hot pressing
10~15min.
Modified styrene butadiene rubber described in step (2), butadiene rubber, plasticiser epoxidized soybean oil, filler material white carbon black, stabilization
Ratio column between agent calcium stearate, lubricant silicone oil are respectively as follows: according to parts by weight, weigh 40~60 parts of modified butylbenzene rubbers respectively
Glue, 50~70 parts of butadiene rubbers, 50~60 parts of plasticiser epoxidized soybean oils, 20~30 parts of filler material white carbon blacks, 1~5 part of stabilization
Agent calcium stearate, 0.2~0.5 part of lubricant silicone oil.
Blending and stirring processing step described in step (2) are as follows: modified styrene butadiene rubber and butadiene rubber are mixed and are placed in mixing
It is 150~160 DEG C in temperature, mixing speed is 5~10min of blending and stirring under 400~600r/min in machine.
Stir process step described in step (2) are as follows: it is white that plasticiser epoxidized soybean oil, filler material are added in mixture C
Carbon black, stabilizer calcium stearate and lubricant silicone oil, low whipping speed are to continue 20~30min of stirring under 500~600r/min.
Extruding pelletization step described in step (3) are as follows: presoma material is placed in double screw extruder, is in temperature
160~170 DEG C, feeding revolving speed is 10~20r/min, and twin-screw revolving speed is extruding pelletization under 30~40r/min.
Autoclave steps described in step (3) are as follows: matrix material is placed in mold, is 120~130 DEG C in temperature,
Pressure is 5~7min of hot pressing at being 160~170 DEG C in temperature under 10~15MPa after 3~5min of hot pressing.The present invention and its other party
Method is compared, and advantageous effects are:
(1) present invention uses mechanical blending method thermoplastic polyurethane elastomer modified styrene butadiene rubber, and with butadiene rubber and changes
Property butadiene-styrene rubber be blended and be used as raw material, in conjunction with auxiliary agents such as plasticiser epoxidized soybean oil, filler material white carbon black, stabilizer, lubricants,
A kind of India rubber wiping material is prepared by hot-forming；Polyurethane hardness height and high resilience have good mechanical strong
Degree, oil resistant, ozone resistance, excellent cryogenic property etc., with thermoplastic polyurethane elastomer modified styrene butadiene rubber, so that modified
Butadiene-styrene rubber has the elasticity of polyurethane elastomer, and butadiene rubber is high with elasticity, wearability is good, cold resistance is good, heat is low, resistance to
The features such as flexibility and good dynamic property, is blended with butadiene rubber and modified styrene butadiene rubber, so that the erasing rubber material tool of preparation
The case where having good elasticity, avoiding the occurrence of fracture in use；
(2) present invention in thermoplastic polyurethane elastomer be a kind of superior performance elastomeric block material, both with plastics heat
Plasticity and mechanical strength, and the elasticity with rubber, furthermore its excellent lower temperature resistance, wearability, chemical corrosion resistance are excellent,
With thermoplastic polyurethane elastomer modified styrene butadiene rubber, so that modified butadiene-styrene rubber has the elasticity of polyurethane elastomer；Heat
The compatible soft segment for occurring mainly in polyurethane and butadiene-styrene rubber segment is blended in plastic polyurethane elastomer and butadiene-styrene rubber, with altogether
Polyurethane elastomer content increases in mixed object, and polyurethane elastomer hard section increases in blend, polyurethane elastomer hard section phase point
From Qu Zeng great；Due to the presence of ester bond in thermoplastic polyurethane elastomer, polarity is stronger, microphase-separated and physical crosslinking degree
Height, and hydrogen bond not only is capable of forming between hard section inside thermoplastic polyurethane elastomer, but also the polar group in soft segment also can portion
Divide ground to form hydrogen bond with the polar group in hard section, be more evenly distributed in hard phase can in soft phase, play resilient, crosslinked point
Effect, to make thermoplastic polyurethane elastomer modified styrene butadiene rubber that there is higher mechanical property；
(3) it is blended in the present invention with butadiene rubber and modified styrene butadiene rubber, butadiene rubber processing performance is good, with excellent wear-resisting
Property and elasticity, heat is few, resistance to low temperature is good, and flexible resistance is also good, and the erasing rubber material of preparation has good elasticity；With
White carbon black makees filler material, and stronger interaction may be since the distribution of white carbon black is more equal between rubber mass and white carbon black filler
Even and average grain diameter is smaller, thus it is with biggish specific surface area, so that white carbon black is come into full contact with rubber mass, institute
The filler network of formation has higher crosslink density, to lock the hunting link of more rubber.
Specific embodiment
According to parts by weight, 50~60 parts of thermoplastic polyurethane elastomer, 20~30 parts of butadiene-styrene rubber, 1~5 are weighed respectively
Thermoplastic polyurethane elastomer and butadiene-styrene rubber are mixed and are placed in mixer by part white carbon black, are 160~170 DEG C in temperature, are stirred
Mixing speed is that white carbon black is added to get mixture A in 6~10min of mixing in mixture A under 300~500r/min, is continued close
10~20min is refined to get mixture B, mixture B is placed in vulcanizing press, preheats 10 at being 160~170 DEG C in temperature
It is 160~170 DEG C in temperature, pressure is 10~15min of hot pressing under 15~20MPa, is cooled to room temperature to get changing after~15min
Property butadiene-styrene rubber；According to parts by weight, 40~60 parts of modified styrene butadiene rubbers, 50~70 parts of butadiene rubbers, 50~60 are weighed respectively
Part plasticiser epoxidized soybean oil, 20~30 parts of filler material white carbon blacks, 1~5 part of stabilizer calcium stearate, 0.2~0.5 part of lubricant
Modified styrene butadiene rubber and butadiene rubber are mixed and are placed in mixer by silicone oil, are 150~160 DEG C in temperature, mixing speed is
5~10min of blending and stirring is under 400~600r/min to get mixture C, be added in mixture C plasticiser epoxidized soybean oil,
Filler material white carbon black, stabilizer calcium stearate and lubricant silicone oil, low whipping speed are to continue stirring 20 under 500~600r/min
~30min is to get presoma material；Presoma material is placed in double screw extruder, is 160~170 DEG C in temperature, feeding
Revolving speed is 10~20r/min, and twin-screw revolving speed is that extruding pelletization sets matrix material to get matrix material under 30~40r/min
It is 120~130 DEG C in temperature in mold, it is 160~170 DEG C in temperature that pressure, which is under 10~15MPa after 3~5min of hot pressing,
5~7min of lower hot pressing is cooled to room temperature and wipes material to get India rubber.
According to parts by weight, 50 parts of thermoplastic polyurethane elastomer, 20 parts of butadiene-styrene rubber, 1 part of white carbon black are weighed respectively, it will
Thermoplastic polyurethane elastomer and butadiene-styrene rubber mixing are placed in mixer, are 160 DEG C in temperature, mixing speed 300r/min
White carbon black is added to get mixture A in lower mixing 6min in mixture A, continues mixing 10min to get mixture B, will mix
Object B is placed in vulcanizing press, is 160 DEG C in temperature after preheating 10min at being 160 DEG C in temperature, pressure is heat under 15MPa
10min is pressed, is cooled to room temperature to get modified styrene butadiene rubber；According to parts by weight, 40 parts of modified styrene butadiene rubbers, 50 are weighed respectively
Part butadiene rubber, 50 parts of plasticiser epoxidized soybean oils, 20 parts of filler material white carbon blacks, 1 part of stabilizer calcium stearate, 0.2 part of lubrication
Modified styrene butadiene rubber and butadiene rubber are mixed and are placed in mixer by agent silicone oil, are 150 DEG C in temperature, mixing speed 400r/
Blending and stirring 5min is under min to get mixture C, and plasticiser epoxidized soybean oil, filler material white carbon black, steady is added in mixture C
Determine agent calcium stearate and lubricant silicone oil, low whipping speed is to continue to stir 20min under 500r/min to get presoma material；
Presoma material is placed in double screw extruder, is 160 DEG C in temperature, feeding revolving speed is 10r/min, and twin-screw revolving speed is
Matrix material is placed in mold by extruding pelletization under 30r/min to get matrix material, is 120 DEG C in temperature, pressure 10MPa
After lower hot pressing 3min, hot pressing 5min at being 160 DEG C in temperature is cooled to room temperature and wipes material to get India rubber.
According to parts by weight, 55 parts of thermoplastic polyurethane elastomer, 25 parts of butadiene-styrene rubber, 3 parts of white carbon blacks are weighed respectively, it will
Thermoplastic polyurethane elastomer and butadiene-styrene rubber mixing are placed in mixer, are 165 DEG C in temperature, mixing speed 400r/min
White carbon black is added to get mixture A in lower mixing 8min in mixture A, continues mixing 15min to get mixture B, will mix
Object B is placed in vulcanizing press, is 165 DEG C in temperature after preheating 13min at being 165 DEG C in temperature, pressure is heat under 17MPa
13min is pressed, is cooled to room temperature to get modified styrene butadiene rubber；According to parts by weight, 50 parts of modified styrene butadiene rubbers, 60 are weighed respectively
Part butadiene rubber, 55 parts of plasticiser epoxidized soybean oils, 25 parts of filler material white carbon blacks, 3 parts of stabilizer calcium stearates, 0.4 part of lubrication
Modified styrene butadiene rubber and butadiene rubber are mixed and are placed in mixer by agent silicone oil, are 155 DEG C in temperature, mixing speed 500r/
Blending and stirring 7min is under min to get mixture C, and plasticiser epoxidized soybean oil, filler material white carbon black, steady is added in mixture C
Determine agent calcium stearate and lubricant silicone oil, low whipping speed is to continue to stir 25min under 550r/min to get presoma material；
Presoma material is placed in double screw extruder, is 165 DEG C in temperature, feeding revolving speed is 15r/min, and twin-screw revolving speed is
Matrix material is placed in mold by extruding pelletization under 35r/min to get matrix material, is 125 DEG C in temperature, pressure 13MPa
After lower hot pressing 4min, hot pressing 6min at being 165 DEG C in temperature is cooled to room temperature and wipes material to get India rubber.
According to parts by weight, 60 parts of thermoplastic polyurethane elastomer, 30 parts of butadiene-styrene rubber, 5 parts of white carbon blacks are weighed respectively, it will
Thermoplastic polyurethane elastomer and butadiene-styrene rubber mixing are placed in mixer, are 170 DEG C in temperature, mixing speed 500r/min
White carbon black is added to get mixture A in lower mixing 10min in mixture A, continues mixing 20min to get mixture B, will mix
It closes object B to be placed in vulcanizing press, is 170 DEG C in temperature, pressure is under 20MPa after preheating 15min at being 170 DEG C in temperature
Hot pressing 15min, is cooled to room temperature to get modified styrene butadiene rubber；According to parts by weight, weigh respectively 60 parts of modified styrene butadiene rubbers,
70 parts of butadiene rubbers, 60 parts of plasticiser epoxidized soybean oils, 30 parts of filler material white carbon blacks, 5 parts of stabilizer calcium stearates, 0.5 part of profit
Modified styrene butadiene rubber and butadiene rubber are mixed and are placed in mixer by lubrication prescription silicone oil, are 160 DEG C in temperature, mixing speed is
It is white that plasticiser epoxidized soybean oil, filler material is added to get mixture C in blending and stirring 10min in mixture C under 600r/min
Carbon black, stabilizer calcium stearate and lubricant silicone oil, low whipping speed are to continue to stir 30min under 600r/min to get forerunner
Body material；Presoma material is placed in double screw extruder, is 170 DEG C in temperature, feeding revolving speed is 20r/min, twin-screw
Revolving speed is that matrix material is placed in mold by extruding pelletization under 40r/min to get matrix material, is 130 DEG C in temperature, pressure
After hot pressing 5min under 15MPa, hot pressing 7min at being 170 DEG C in temperature is cooled to room temperature and wipes material to get India rubber.
India rubber prepared by the present invention is wiped into material and commercially available common erasing rubber detects, specific testing result is as follows
Table table 1:
Test method:
Erasing rate: the person's handwriting of propelling pencil disappear word to measure based on JISS6050；
Abrasion loss: the sample of erasing rubber being processed as cylindric, and weight is measured with mg unit.By its sample with cylinder
The direction that intersects vertically of direction of rotary shaft back and forth movement be inserted on the rubber holder for being arranged in and disappearing on word testing machine,
Setting tests identical paper with erasing rate on ph test paper ph holder.Next, sample will be attached to the load of 500g round-trip 50 times
Rubber crumb flat brush removal on product, the weight after measurement abrasion.
Secondly, passing through the formula of (weight after initial weight-abrasion)/initial weight × 100, wear rate is acquired, using 3 times
Average value.
Crumb loading: with wiping word loading 500gf reciprocal 10 times, by the quality of maximum eraser chips divided by the matter of test film reduction
The value of amount is calculated multiplied by 100 obtained values as crumb loading rate (%).And every a kind of cooperation will measure 3 bits respectively
Quality is averaged.
Crumb loading rate (%)=[quality of maximum chip/(quality of test film after quality-test of test film before testing)] ×
100。
The evaluation method (JISS60504.3) of migration:
Migration test, is cut into 40mm for pencil, two parallel (lengthy motion pictures relative to test film) is placed in long 35mm, width
On the test film (erasing rubber) of 15mm or more and thickness 5mm or more, the counterweight of 20g is put above it, is put into 60 ± 2 DEG C
It in thermostat, is taken out after 1 hour, checks whether the coating of pencil is attached on test film, evaluated according to following standard.
A: pencil coating is absolutely not attached on test film
B: remain pencil trace on test film
C: pencil coating is attached on test film
Referring to GB21027-2007 the safety general of students' supplies " requirement ", inspections project is transportable element: chromium, arsenic, selenium,
Cadmium, antimony, barium, lead, mercury, embodiment 1-3 and comparative example are to be not detected.
1 India rubber of table wipes material property characterization
India rubber prepared by the present invention wipes material as shown in Table 1, meets " the safety general requirements of students' supplies ", erasing rate
Height, abrasion loss is low, and crumb loading rate is big, and flexural strength is big, excellent in mechanical performance.
Claims (10)
1. the preparation method that a kind of India rubber wipes material, it is characterised in that specific preparation step are as follows:
(1) thermoplastic polyurethane elastomer, butadiene-styrene rubber, white carbon black are taken, thermoplastic polyurethane elastomer and butadiene-styrene rubber are mixed
Conjunction is placed in mixer, and white carbon black is added to get mixture A in mixing processing in mixture A, continues 10~20min of mixing,
Up to mixture B, mixture B is placed in vulcanizing press, after the pre-heat treatment, hot-pressing processing is cooled to room temperature to get modification
Butadiene-styrene rubber；
(2) take modified styrene butadiene rubber, butadiene rubber, plasticiser epoxidized soybean oil, filler material white carbon black, stabilizer calcium stearate,
Modified styrene butadiene rubber and butadiene rubber are mixed and are placed in mixer by lubricant silicone oil, and blending and stirring is handled to get mixture C,
Plasticiser epoxidized soybean oil, filler material white carbon black, stabilizer calcium stearate and lubricant silicone oil are added in mixture C, continues
Stir process is to get presoma material；
(3) presoma material is placed in extruding pelletization in double screw extruder and matrix material is placed in mold to get matrix material
In, hot-pressing processing is cooled to room temperature and wipes material to get India rubber.
2. the preparation method that a kind of India rubber according to claim 1 wipes material, it is characterised in that: step (1) is described
Thermoplastic polyurethane elastomer, butadiene-styrene rubber, the ratio between white carbon black be respectively as follows: according to parts by weight, weigh 50 respectively
~60 parts of thermoplastic polyurethane elastomer, 20~30 parts of butadiene-styrene rubber, 1~5 part of white carbon black.
3. the preparation method that a kind of India rubber according to claim 1 wipes material, it is characterised in that: step (1) is described
Mixing processing step are as follows: thermoplastic polyurethane elastomer and butadiene-styrene rubber are mixed and are placed in mixer, temperature be 160~
170 DEG C, mixing speed is 6~10min of mixing under 300~500r/min.
4. the preparation method that a kind of India rubber according to claim 1 wipes material, it is characterised in that: step (1) is described
The pre-heat treatment step are as follows: mixture B is placed in vulcanizing press, temperature be 160~170 DEG C at preheat 10~15min.
5. the preparation method that a kind of India rubber according to claim 1 wipes material, it is characterised in that: step (1) is described
Autoclave steps are as follows: temperature be 160~170 DEG C, pressure be 15~20MPa under 10~15min of hot pressing.
6. the preparation method that a kind of India rubber according to claim 1 wipes material, it is characterised in that: step (2) is described
Modified styrene butadiene rubber, butadiene rubber, plasticiser epoxidized soybean oil, filler material white carbon black, stabilizer calcium stearate, lubricant silicon
Ratio column between oil are respectively as follows: according to parts by weight, weigh 40~60 parts of modified styrene butadiene rubbers, 50~70 parts of suitable fourth rubbers respectively
Glue, 50~60 parts of plasticiser epoxidized soybean oils, 20~30 parts of filler material white carbon blacks, 1~5 part of stabilizer calcium stearate, 0.2~
0.5 part of lubricant silicone oil.
7. the preparation method that a kind of India rubber according to claim 1 wipes material, it is characterised in that: step (2) is described
Blending and stirring processing step are as follows: modified styrene butadiene rubber and butadiene rubber are mixed and are placed in mixer, temperature be 150~
160 DEG C, mixing speed is 5~10min of blending and stirring under 400~600r/min.
8. the preparation method that a kind of India rubber according to claim 1 wipes material, it is characterised in that: step (2) is described
Stir process step are as follows: in mixture C be added plasticiser epoxidized soybean oil, filler material white carbon black, stabilizer calcium stearate
With lubricant silicone oil, low whipping speed is to continue 20~30min of stirring under 500~600r/min.
9. the preparation method that a kind of India rubber according to claim 1 wipes material, it is characterised in that: step (3) is described
Extruding pelletization step are as follows: presoma material is placed in double screw extruder, is 160~170 DEG C in temperature, feeding revolving speed is
10~20r/min, twin-screw revolving speed are extruding pelletization under 30~40r/min.
10. the preparation method that a kind of India rubber according to claim 1 wipes material, it is characterised in that: step (3) is described
Autoclave steps are as follows: matrix material is placed in mold, temperature be 120~130 DEG C, pressure be 10~15MPa under heat
After pressing 3~5min, 5~7min of hot pressing at being 160~170 DEG C in temperature.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110698742A (en) * | 2019-11-25 | 2020-01-17 | 欧阳子川 | Multifunctional eraser and manufacturing method thereof |
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| JP3450053B2 (en) * | 1994-04-20 | 2003-09-22 | 株式会社シード | Eraser |
| CN101289554A (en) * | 2007-04-17 | 2008-10-22 | 漯河市罗孚文具制造有限公司 | Environment protection material for wiping pencil lead and production process thereof |
| WO2011122719A1 (en) * | 2010-03-31 | 2011-10-06 | 주식회사 모나미 | Non-pvc eraser composition |
| CN105153578A (en) * | 2015-08-24 | 2015-12-16 | 蚌埠市神龙笔业有限公司 | Durable excellent-elasticity eraser and preparation method thereof |
| CN106751143A (en) * | 2016-11-29 | 2017-05-31 | 金华博科彩泥技术研发有限公司 | Make clay of erasing rubber and preparation method thereof by oneself |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3450053B2 (en) * | 1994-04-20 | 2003-09-22 | 株式会社シード | Eraser |
| CN101289554A (en) * | 2007-04-17 | 2008-10-22 | 漯河市罗孚文具制造有限公司 | Environment protection material for wiping pencil lead and production process thereof |
| WO2011122719A1 (en) * | 2010-03-31 | 2011-10-06 | 주식회사 모나미 | Non-pvc eraser composition |
| CN105153578A (en) * | 2015-08-24 | 2015-12-16 | 蚌埠市神龙笔业有限公司 | Durable excellent-elasticity eraser and preparation method thereof |
| CN106751143A (en) * | 2016-11-29 | 2017-05-31 | 金华博科彩泥技术研发有限公司 | Make clay of erasing rubber and preparation method thereof by oneself |
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| CN110698742A (en) * | 2019-11-25 | 2020-01-17 | 欧阳子川 | Multifunctional eraser and manufacturing method thereof |
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