A kind of automotive brake pads bloop and preparation method thereof
Technical field
The invention belongs to automotive brake pads technical fields, will specifically be related to a kind of automotive brake pads bloop and its system
Preparation Method.The characteristics of bloop is by the moderate stabilization of homogeneous, hardness, high-yield strength and higher elongation.
Background technique
Brake block is generated when with bloop be one in automobile brake system being for reducing or eliminating brake
A kind of attachment of noise, the bloop are pasted on the brake block back side, and thickness is between 0.5-1.5mm.Constitute the knot of bloop
Structure material includes rubber steel disc, sheet metal, film for rubber or the scraps of paper.Due to braking, generated noise is by friction plate and brake
Frictional vibration is formed between disk, and the frictional vibration is formed by noise after friction facing to its steel back, and intensity can be sent out
A raw attenuation change, a then attenuation change is occurred by steel back to bloop again, and since phase resistance layer by layer is to avoid making an uproar
Sound plays the role of reducing noise because it constitutes resonance.And the material for constituting bloop is produced when directly influencing automobile brake
The improvement and elimination of raw noise.The performances such as the presently used matching used bloop high temperature resistance of brake block and its hardness
It is difficult to meet generated hot environment when brake block brake, so that it absorbs the degradation for inhibiting noise audio.
It is an object of the invention to provide a kind of textured uniform, moderate stabilization of hardness, there is high-yield strength, higher
Elongation and the automotive brake pads bloop of constant compression characteristic and preparation method thereof.
To achieve the above object, the technical solution adopted by the present invention are as follows:
A kind of automotive brake pads bloop, including
The nitrile rubber of 25-35 parts by weight, the sulphur of 2-4 parts by weight, the phenolic resin of 3-7 parts by weight, 20-40 parts by weight
Silica inorganic filler, the carbon black of 5-10 parts by weight, the light magnesium oxide of 10-20 parts by weight, 4.5-10 parts by weight
The barium sulfate of basalt mineral fiber, 15-25 parts by weight.
Constituting a kind of above-mentioned additional technical feature of bloop further include:
--- the nitrile rubber is solid nitrile rubber;
The phenolic resin is unmodified phenolic resin;
--- it in 4.0-5.0um, length is 100-150um without slag ball fiber that the basalt mineral fiber, which is diameter,;
--- the content of the barium sulfate is not less than 95%;
--- the silica filler is by high-temperature calcination process and content is 95% or more.
A kind of preparation method of automotive brake pads bloop, comprising the following steps:
Step 1, by solid nitrile rubber and carbon black mixing 5-10 minutes in mixer;
Step 2: phenolic resin, silica inorganic filler, light magnesium oxide, basalt mineral fiber and barium sulfate are added
Into mixer, 80-95 DEG C at a temperature of mixing 5-10 minutes;
The good rubber of above-mentioned mixing friction on purl machine is shaped to the sheet rubber of 0.3-0.5mm by step 3;
Step 4 exists sheet pack sieve for the 0.5-1.0mm thickness that the molding sheet rubber of friction and two-sided or single side are coated with bonding agent
Together, bonding by Vulcanization is carried out on the plane roller mill that temperature is 140-160 DEG C be shaped to noise reduction sheet material;
Step 5: by the noise reduction sheet material of above-mentioned formation merging continuous tunnel furnace, 100-130 DEG C at a temperature of carry out 20-40
The secondary curing sizing of minute;
Step 6: the noise reduction sheet material after solidifying and setting is punched by type shape required for different braking automobiles, is formed and is fixed
Bloop on brake block steel back.
A kind of automotive brake pads provided by the present invention compared with prior art, is had the advantage that with bloop
First, due to constitute bloop sheet rubber in containing nitrile rubber and the phenolic resin that is not modified so that being formed
The high temperature resistant of sheet rubber can reach 300-330 DEG C, can satisfy the high temperature range for being formed by brake block, it is good with having
Good high temperature resistance;
Second, improving the hardness of its sheet rubber due to containing silica inorganic filler in the sheet rubber of composition bloop, making
Barotolerance can increase, guarantee the compression set amount and fatigue-resistance characteristics of product.
Third: due to containing basalt mineral fiber component in the sheet rubber for constituting bloop, the drawing of rubber is improved
Stretch intensity and elongation.
Specific embodiment
Embodiment 1
It first will be mixing 6 minutes in the solid nitrile rubber of 30 parts by weight and the carbon black of 10 parts by weight merging mixer;Then will
The phenolic resin of 3.0 parts by weight, the sulphur of 2.0 parts by weight, the silica inorganic filler of 20 parts by weight, 12 parts by weight lightweight
Magnesia, the basalt mineral fiber of 10 parts by weight, 15 parts by weight barium sulfate merging mixer in, be 80 DEG C close in temperature
Mixing 6 minutes in mill;The good rubber of above-mentioned mixing friction on purl machine is shaped to the sheet rubber of 0.3mm;By friction at
The sheet rubber of type and the steel plate of the two-sided 0.5mm thickness for being coated with bonding agent stack together, 140 DEG C at a temperature of utilize straight roll
Bonding by Vulcanization forms noise reduction sheet material on milling train;Noise reduction sheet material is carried out to 40 minutes secondary solid in 110 DEG C of continuous tunnel furnace
Change sizing;It is punched into the shape of bloop required for braking automobile.
The test result of its performance parameter of the bloop: hardness: Shao's soft: 70, yield strength: 8MPa, elongation:
185%, compression ratio: 23%.
Same brake flake products are before and after having used bloop prepared by embodiment 1, noise test Comparative result:
Bloop of the present invention is not used, noise test result: big between 2KHz-4KHz by 1400 noise tests
It is incidence 10.2% in the noise of 70dB (A), the noise that 70dB (A) is greater than between 4KHz-6KHz is incidence 13.5%.
Noise between 6KHz-10KHz greater than 70dB (A) is incidence 9.6%.Making an uproar greater than 70dB (A) between 10KHz-14KHz
Sound is incidence 3.5%.
Using after bloop of the present invention, noise test result: by 1400 noise tests,
Noise between 2KHz-4KHz greater than 70dB (A) is incidence 2.3%, and the noise of 70dB (A) is greater than between 4KHz-6KHz
For incidence 4.5%.Noise between 6KHz-10KHz greater than 70dB (A) is incidence 3.1%.It is big between 10KHz-14KHz
In 70dB (A) noise be incidence 0.5%.
Embodiment 2,
It first will be mixing 7 minutes in the solid nitrile rubber of 25 parts by weight and the carbon black of 8.0 parts by weight merging mixer;Then will
The phenolic resin of 5.0 parts by weight, the sulphur of 3.0 parts by weight, the silica inorganic filler of 26 parts by weight, 12 parts by weight lightweight
Magnesia, the basalt mineral fiber of 8.0 parts by weight, 25 parts by weight barium sulfate merging mixer in, be 80 DEG C in temperature
Mixing 8 minutes in mixer;The good rubber of above-mentioned mixing friction on purl machine is shaped to the sheet rubber of 0.3mm;By friction
Molding sheet rubber and the steel plate of the two-sided 0.5mm thickness for being coated with bonding agent stack together, 145 DEG C at a temperature of utilize plane
Bonding by Vulcanization forms noise reduction sheet material on roller mill;Noise reduction sheet material is carried out to 30 minutes secondary in 120 DEG C of continuous tunnel furnace
Solidifying and setting;It is punched into the shape of bloop required for braking automobile.
The test result of its performance parameter of the bloop: hardness: Shao's soft: 75, yield strength: 8.5MPa, elongation
Rate: 196%, compression ratio: 22%.
Same brake flake products are before and after having used bloop prepared by embodiment 2, noise test Comparative result:
Bloop of the present invention is not used, noise test result: big between 2KHz-4KHz by 1400 noise tests
It is incidence 10.2% in the noise of 70dB (A), the noise that 70dB (A) is greater than between 4KHz-6KHz is incidence 13.5%.
Noise between 6KHz-10KHz greater than 70dB (A) is incidence 9.6%.Making an uproar greater than 70dB (A) between 10KHz-14KHz
Sound is incidence 3.5%.
Using after bloop of the present invention, noise test result: by 1400 noise tests,
Noise between 2KHz-4KHz greater than 70dB (A) is incidence 1.5%, and the noise of 70dB (A) is greater than between 4KHz-6KHz
For incidence 2.1%.Noise between 6KHz-10KHz greater than 70dB (A) is incidence 2.8%.It is big between 10KHz-14KHz
In 70dB (A) noise be incidence 0.5%.
Embodiment 3,
It first will be mixing 10 minutes in the solid nitrile rubber of 34 parts by weight and the carbon black of 5 parts by weight merging mixer;Then by 4
The lightweight oxidation of the phenolic resin of parts by weight, the sulphur of 4 parts by weight, the silica inorganic filler of 35 parts by weight, 12 parts by weight
Magnesium, the basalt mineral fiber of 5 parts by weight, 15 parts by weight barium sulfate merging mixer in, be 95 DEG C of mixer in temperature
Middle mixing 9 minutes;The good rubber of above-mentioned mixing friction on purl machine is shaped to the sheet rubber of 0.3mm;Friction is molding
Sheet rubber and the steel plate of the two-sided 0.5mm thickness for being coated with bonding agent stack together, 150 DEG C at a temperature of utilize plane roller mill
Upper bonding by Vulcanization forms noise reduction sheet material;The secondary curing that noise reduction sheet material carries out 20 minutes in 130 DEG C of continuous tunnel furnace is determined
Type;It is punched into the shape of bloop required for braking automobile.
The test result of its performance parameter of the bloop: hardness: Shao's soft: 80, yield strength: 9.4MPa, elongation
Rate: 215%, compression ratio: 21%.
Noise test Comparative result: same brake flake products do not make before and after having used bloop prepared by embodiment 3
With bloop of the present invention, noise test result: by 1400 noise tests, it is greater than between 2KHz-4KHz
The noise of 70dB (A) is incidence 10.2%, and the noise that 70dB (A) is greater than between 4KHz-6KHz is incidence 13.5%.
Noise between 6KHz-10KHz greater than 70dB (A) is incidence 9.6%.Making an uproar greater than 70dB (A) between 10KHz-14KHz
Sound is incidence 3.5%.
Using after bloop of the present invention, noise test result: by 1400 noise tests,
Noise between 2KHz-4KHz greater than 70dB (A) is incidence 0.9%, and the noise of 70dB (A) is greater than between 4KHz-6KHz
For incidence 0.2%.Noise between 6KHz-10KHz greater than 70dB (A) is incidence 0%.It is greater than between 10KHz-14KHz
The noise of 70dB (A) is incidence 0%.
Embodiment 4,
It first will be mixing 8 minutes in the solid nitrile rubber of 33 parts by weight and the carbon black of 9 parts by weight merging mixer;Then will
The phenolic resin of 4.5 parts by weight, the sulphur of 3.5 parts by weight, the silica inorganic filler of 38 parts by weight, 15 parts by weight lightweight
Magnesia, the basalt mineral fiber of 6 parts by weight, 18 parts by weight barium sulfate merging mixer in, be 92 DEG C close in temperature
Mixing 9 minutes in mill;The good rubber of above-mentioned mixing friction on purl machine is shaped to the sheet rubber of 0.3mm;By friction at
The sheet rubber of type and the steel plate of the two-sided 0.5mm thickness for being coated with bonding agent stack together, 152 DEG C at a temperature of utilize straight roll
Bonding by Vulcanization forms noise reduction sheet material on milling train;Noise reduction sheet material is carried out to 22 minutes secondary solid in 130 DEG C of continuous tunnel furnace
Change sizing;It is punched into the shape of bloop required for braking automobile.
Test result: hardness: Shao's soft: 81, yield strength: 9.5MPa, elongation: 225%, compression ratio: 19.5%.
Test result: hardness: Shao's soft: 81, yield strength: 9.5MPa, elongation: 225%, compression ratio: 19.5%.
Same brake flake products are before and after having used bloop prepared by embodiment 4, noise test Comparative result:
Bloop of the present invention is not used, noise test result: big between 2KHz-4KHz by 1400 noise tests
It is incidence 10.2% in the noise of 70dB (A), the noise that 70dB (A) is greater than between 4KHz-6KHz is incidence 13.5%.
Noise between 6KHz-10KHz greater than 70dB (A) is incidence 9.6%.Making an uproar greater than 70dB (A) between 10KHz-14KHz
Sound is incidence 3.5%.
Using after bloop of the present invention, noise test result: by 1400 noise tests,
Noise between 2KHz-4KHz greater than 70dB (A) is incidence 0.7%, and the noise of 70dB (A) is greater than between 4KHz-6KHz
For incidence 0.2%.Noise between 6KHz-10KHz greater than 70dB (A) is incidence 0%.It is greater than between 10KHz-14KHz
The noise of 70dB (A) is incidence 0%.
Embodiment 5,
It first will be mixing 10 minutes in the solid nitrile rubber of 33.5 parts by weight and the carbon black of 8 parts by weight merging mixer;Then
By the phenolic resin of 4.8 parts by weight, the sulphur of 3.8 parts by weight, the silica inorganic filler of 36 parts by weight, 18 parts by weight it is light
Matter magnesia, the basalt mineral fiber of 4.5 parts by weight, 19 parts by weight barium sulfate merging mixer in, temperature be 95 DEG C
Mixer in mixing 9 minutes;The good rubber of above-mentioned mixing friction on purl machine is shaped to the sheet rubber of 0.3mm;It will roll
The sheet rubber of gum forming and the steel plate of the two-sided 0.5mm thickness for being coated with bonding agent stack together, 153 DEG C at a temperature of using flat
Bonding by Vulcanization forms noise reduction sheet material on the roller mill of face;Noise reduction sheet material is carried out to the two of 20 minutes in 130 DEG C of continuous tunnel furnace
Secondary solidifying and setting;It is punched into the shape of bloop required for braking automobile.
Test result: hardness: Shao's soft: 85, yield strength: 9.7MPa, elongation: 235%, compression ratio: 19.8%.
Same brake flake products are before and after having used bloop prepared by embodiment 5, noise test Comparative result:
Bloop of the present invention is not used, noise test result: big between 2KHz-4KHz by 1400 noise tests
It is incidence 10.2% in the noise of 70dB (A), the noise that 70dB (A) is greater than between 4KHz-6KHz is incidence 13.5%.
Noise between 6KHz-10KHz greater than 70dB (A) is incidence 9.6%.Making an uproar greater than 70dB (A) between 10KHz-14KHz
Sound is incidence 3.5%.
Using after bloop of the present invention, noise test result: by 1400 noise tests,
Noise between 2KHz-4KHz greater than 70dB (A) is incidence 0.7%, and the noise of 70dB (A) is greater than between 4KHz-6KHz
For incidence 0.2%.Noise between 6KHz-10KHz greater than 70dB (A) is incidence 0%.It is greater than between 10KHz-14KHz
The noise of 70dB (A) is incidence 0%.
Embodiment 6,
It first will be mixing 9.5 minutes in the solid nitrile rubber of 28 parts by weight and the carbon black of 9 parts by weight merging mixer;Then will
The phenolic resin of 6.0 parts by weight, the sulphur of 4.0 parts by weight, the silica inorganic filler of 39 parts by weight, 15 parts by weight lightweight
Magnesia, the basalt mineral fiber of 6 parts by weight, 20 parts by weight barium sulfate merging mixer in, be 94 DEG C close in temperature
Mixing 9.5 minutes in mill;The good rubber of above-mentioned mixing friction on purl machine is shaped to the sheet rubber of 0.3mm;By friction
Molding sheet rubber and the steel plate of the two-sided 0.5mm thickness for being coated with bonding agent stack together, 155 DEG C at a temperature of utilize plane
Bonding by Vulcanization forms noise reduction sheet material on roller mill;Noise reduction sheet material is carried out to 20 minutes secondary in 130 DEG C of continuous tunnel furnace
Solidifying and setting;It is punched into the shape of bloop required for braking automobile.
Test result: hardness: Shao's soft: 82, yield strength: 10.5MPa, elongation: 208%, compression ratio: 18.9%.
Same brake flake products are before and after having used bloop prepared by embodiment 6, noise test Comparative result:
Bloop of the present invention is not used, noise test result: big between 2KHz-4KHz by 1400 noise tests
It is incidence 10.2% in the noise of 70dB (A), the noise that 70dB (A) is greater than between 4KHz-6KHz is incidence 13.5%.
Noise between 6KHz-10KHz greater than 70dB (A) is incidence 9.6%.Making an uproar greater than 70dB (A) between 10KHz-14KHz
Sound is incidence 3.5%.
Using after bloop of the present invention, noise test result: by 1400 noise tests,
Noise between 2KHz-4KHz greater than 70dB (A) is incidence 0.4%, and the noise of 70dB (A) is greater than between 4KHz-6KHz
For incidence 0.1%.Noise between 6KHz-10KHz greater than 70dB (A) is incidence 0%.It is greater than between 10KHz-14KHz
The noise of 70dB (A) is incidence 0%.
In the preparation process of bloop for constituting brake block,
The high temperature resistance and hardness of bloop can be improved, using solid nitrile rubber and phenolic resin to guarantee its resistance to pressure
Degree and yield strength.
Due to " the molding sheet rubber of friction and the two-sided steel plate for being coated with bonding agent being stacked together, straight roll is utilized
Bonding by Vulcanization forms the vulcanization sticking temperature of noise reduction sheet material on milling train " bonding by Vulcanization is set between 140-160 DEG C, it can make
The free phenol obtained in resin slowly sufficiently volatilizees, and can effectively ensure that the stable yield strength of prepared noise reduction version, while
It can effectively avoid vulcanization from generating with the excessively high gas of secondary curing temperature too fast, generate bubble in rubber and form waste Phenomena
Occur;
In secondary curing process, solidification temperature is set at 100-130 DEG C, and curing time was arranged at 20-40 minutes, it can
So that constituting the sheet rubber of acoustical panel can sufficiently solidify, stable compression performance is formed.
In the sheet rubber for constituting bloop, the diameter of used basalt mineral fiber is in 4.0-5.0um, long DEG C
It is 100-150um without slag ball fiber, product hardness increase can be used, there is anti-fatigue ability to enhance performance;Used sulphur
The content of sour barium is not less than 95%, in order to improve the high temperature resistant and abrasion resistance properties of made sheet rubber;Used two
Cilicon oxide filler is silica and content made of firing by high-temperature calcination process 95% or more, be more advantageous to secondly
The stabilization of silica performance, and further increase the stable performance to form the sheet rubber of bloop.