CN115926275A

CN115926275A - Anti transmission band that splits

Info

Publication number: CN115926275A
Application number: CN202310096098.4A
Authority: CN
Inventors: 许俊平; 张圣华; 余文洋
Original assignee: Zhejiang Sanjia Rubber Belt Co ltd
Current assignee: Zhejiang Sanjia Rubber Belt Co ltd
Priority date: 2023-02-10
Filing date: 2023-02-10
Publication date: 2023-04-07
Anticipated expiration: 2043-02-10
Also published as: CN115926275B

Abstract

The application relates to a transmission band technical field, concretely relates to anti transmission band that splits, its raw materials include following part by mass component: 100 parts of styrene butadiene rubber; 10-20 parts of carbon black; 5-10 parts of metal oxide filler; 10-40 parts of vulcanized silicone rubber; 2-10 parts of a thermoplastic elastomer; 0.1-1 part of liquid paraffin; wherein, the mass fraction of the metal oxide filler at least comprises more than 50 percent of zirconia, and the rest of the metal oxide filler can be selected from any number of zinc oxide, iron oxide and magnesium oxide in any proportion; the thermoplastic elastomer is selected from any number of SBS, SEBS and SEPS; besides the components, the raw materials also comprise optional antioxidant, age resister and uvioresistant agent which are suitable for a styrene butadiene rubber system. The transmission belt has good mechanical property, is not easy to crack in the using process, and has good wear resistance and tensile resistance.

Description

Anti transmission band that splits

Technical Field

The application relates to a transmission band technical field, concretely relates to anti-cracking transmission band.

Background

Styrene-butadiene rubber or a composite rubber system taking styrene-butadiene rubber as a main body is a main raw material for preparing a transmission belt.

The rubber material taking the styrene butadiene rubber as the main body has better mechanical property, and can meet the performance requirement of a transmission belt under most conditions. However, since the belt is in a tight state for a long time, the surface thereof has a large tension. Styrene butadiene rubber generally has better elasticity, but is tight for a long time, and the material impact and the surface abrasion easily cause fine cracks on the surface of the styrene butadiene rubber, and the cracks easily induce the fracture or the damage of a transmission belt in the production, thereby influencing the service life of the transmission belt.

Disclosure of Invention

The application relates to an anti-cracking transmission belt, which has good mechanical property, is not easy to crack in the using process and has good wear resistance and tensile resistance.

The utility model provides an anti transmission band that splits, including following part by mass component:

100 parts of styrene butadiene rubber;

10 to 20 portions of carbon black

5 to 10 portions of metal oxide filler

10-40 parts of vulcanized silicone rubber;

2 to 10 portions of thermoplastic elastomer

0.1-1 part of liquid paraffin;

wherein, the metal oxide filler at least comprises more than 50 percent of zirconia by mass fraction, and the rest metal oxide filler can be selected from any number of zinc oxide, iron oxide and magnesium oxide in any proportion;

the thermoplastic elastomer is selected from any number of SBS, SEBS and SEPS.

In the technical scheme, part of carbon black filler in the prior art is replaced by metal oxide filler mainly comprising zirconium oxide, the strength is improved by utilizing the metal oxide, and meanwhile, part of other components are added into the system to jointly improve the strength of the styrene butadiene rubber. The silicon sulfide rubber has the effects of high molecular weight and high strength, obviously improves the wear resistance and impact resistance of a transmission belt in a system, and has good compatibility with metal oxide fillers. The thermoplastic elastomer can effectively improve the cohesive force, obviously improve the mechanical strength and improve the wear resistance to a certain extent. The liquid paraffin can play a role in lubrication and uniform mixing. After the components are mixed, the prepared conveyor belt has excellent crack resistance and wear resistance, and the service life of the conveyor belt is greatly prolonged.

Preferably, the mass part of the vulcanized silicone rubber is 25 to 30 parts.

Preferably, the adhesive further comprises 0.1 to 0.5 parts by mass of a coupling agent.

The coupling agent can enhance the binding force between the organic phase and the inorganic phase, thereby improving the cohesive force and leading the conveyor belt to still have good anti-cracking performance under the environment of long-term large tension.

Preferably, in the metal oxide filler, the mass fraction of zirconia is 60 to 80%, and the rest is zinc oxide.

Preferably, the thermoplastic elastomer is SEBS.

Preferably, the rubber material also comprises 3 to 5 parts by mass of ethylene propylene diene monomer.

In the system, the ethylene propylene diene monomer rubber can play a role in lubricating the system, reducing the processing difficulty and improving the compatibility of each component, and the effects of further reducing the caking and caking phenomena among materials, improving the uniformity of various organic components and indirectly improving the mechanical property are reflected in the actual effect.

Preferably, the adhesive further comprises 1 to 3 parts by mass of a rosin-based tackifying resin. The rosin tackifying resin is hydrogenated rosin resin.

The hydrogenated rosin resin can improve the firm bonding degree between the organic phase and the organic phase, has the effect of improving the cohesive force and reduces the appearance of surface fine cracks.

To sum up, the anti crazing transmission band that this application provided has excellent mechanical properties, and the difficult tiny microgroove that produces in its use surface has better mechanical strength.

Detailed Description

The technical solution of the present application is further explained by the following detailed description.

In the following examples, the properties of the samples prepared were measured as follows:

1. wear resistance: reference is made to standard test in GB/T9867.2008 "determination of abrasion resistance of vulcanized rubber or thermoplastic rubber (rotating drum type abrasion machine method)".

2. Mechanical properties: the tensile strength was measured with reference to GB/T528.2009 test for tensile stress strain Properties of vulcanized rubber or thermoplastic rubber, and the test piece shape was a 1-type dumbbell test piece with a tensile rate of 500mm/min.

3. And (3) testing the anti-cracking capability: according to the method in GB/T11206-2009 surface cracking method for rubber aging test, ozone aging is adopted to determine, the ozone concentration is 200pphm, the test temperature is 45 +/-2 ℃, the sample elongation is 25%, and the time of no cracking is determined.

In addition, under the condition of no special description, the Shore hardness of the sample is in the range of 60-63, and the daily use requirement is met.

Example 1, an anti-crack transfer belt, prepared by mixing the raw materials shown in table 1, kneading for 20min, and then cutting into a sample for testing.

Besides the components, the coating also comprises 0.1 part of butylated hydroxytoluene (antioxidant 264) by mass.

The results of the performance measurement of example 1 are shown in Table 2.

The transmission belt sample prepared in the application has good mechanical property and anti-cracking property, and the cracking time is longer in the simulation of long-term use. Has good crack resistance under larger tension.

In example 2, the amount of the vulcanized silicone rubber used in example 1 was adjusted, and the results are shown in table 3.

The experiment proves that the addition of the silicon rubber can effectively improve the anti-cracking capability and has an obvious improvement effect on the mechanical property, and when the used mass part of the silicon rubber is in the range of 25-30 parts, the improvement effect is most obvious. In addition, examples 2 to 7 are not suitable for the actual belt material because they tend to become hard and brittle as a whole, their tensile strength is not changed, but their crack time is significantly shortened, and the actually measured elongation at break is reduced as compared with the other examples.

Example 3 the results of adjusting the amounts of the components of the metal oxide filler to be used based on example 1 are shown in table 4.

It can be seen from the above experiments that the wear resistance and crack resistance can be improved by increasing the amount of zirconia, and the overall reduction of the metal oxide has a significant effect on the wear resistance, but when the amount reaches 5 parts by mass, still acceptable results are obtained. The addition of zinc oxide may also improve the good wear resistance and crack resistance to some extent, but is still insufficient compared to zirconia.

Example 4, on the basis of example 1, the selection and amount of the thermoplastic elastomer were adjusted, and the results are shown in table 5.

The addition of the thermoplastic elastomer can improve the overall performance to a certain extent, probably because the bonding force between the silicon sulfide rubber and the styrene butadiene rubber is insufficient, and the overall nucleation property can be enhanced after the thermoplastic elastomer is added. In examples 4 to 6, the amount of the thermoplastic elastomer used was too small, and the tensile strength and the cracking time were significantly adversely affected. Among many thermoplastic elastomers, SEBS has certain advantages in mechanical properties over other thermoplastic elastomers.

The thermoplastic elastomer is insufficient in overall strength, and if the amount is too large, the properties of the styrene-butadiene rubber itself are affected, and the tensile strength is weakened.

Example 5 the results of adjusting the amounts of liquid paraffin, carbon black and coupling agent to those used in example 1 are shown in table 6.

Example 6, ethylene propylene diene monomer rubber and graphene oxide of different qualities were further added to example 1, and the results are shown in table 7. Wherein the thickness range of the graphene oxide is 0.55-1.1nm, and the degree of oxidation is about 45%.

The ethylene propylene diene monomer can be used as a lubricant and a compatilizer, the anti-cracking effect is improved to a certain extent, and the system is easier to mix uniformly during processing after the ethylene propylene diene monomer is added. Since it contains no active group, an excessive amount of addition results in a decrease in the overall cohesive force.

The addition of the graphene oxide can effectively improve the wear resistance and has a strong inhibiting effect on surface cracks, and the reason for the strong inhibiting effect is that the graphene oxide provides an anchor point for the coupling agent, so that the cohesive force is further improved.

Example 7 the results of adjusting the type and amount of the tackifier resin in addition to examples 6 to 7 are shown in Table 8.

Compared with other tackifying resins, the hydrogenated rosin resin has better improvement effect on the overall performance.

The above embodiments are preferred embodiments of the present application, and the protection scope of the present application is not limited by the above embodiments, so: all equivalent changes made according to the structure, shape and principle of the present application shall be covered by the protection scope of the present application.

Claims

1. The anti-cracking transmission belt is characterized by comprising the following raw materials in parts by mass:

100 parts of styrene butadiene rubber;

10 to 20 portions of carbon black

5 to 10 portions of metal oxide filler

10-40 parts of vulcanized silicone rubber;

2 to 10 portions of thermoplastic elastomer

0.1-1 part of liquid paraffin;

the thermoplastic elastomer is selected from any number of SBS, SEBS and SEPS;

besides the components, the raw materials also comprise optional antioxidant, age resister and uvioresistant agent which are suitable for a styrene butadiene rubber system.

2. The anti-cracking transmission belt according to claim 1, further comprising 0.1 to 0.5 parts by mass of a coupling agent.

3. The anti-cracking transmission belt according to claim 1, wherein the metal oxide filler comprises zirconia in an amount of 60 to 80% by mass, and zinc oxide as the remaining component.

4. The crack resistant transmission belt of claim 1 wherein the thermoplastic elastomer is SEBS.

5. The anti-cracking transmission belt according to claim 1, further comprising 3 to 5 parts by mass of ethylene propylene diene monomer.

6. The anti-cracking transmission belt according to claim 1, further comprising 2-5 parts by mass of graphene oxide.

7. The anti-cracking transmission belt according to claim 1, wherein the mass part of the vulcanized silicone rubber is 25 to 30 parts.

8. The anti-cracking transmission belt according to claim 1, further comprising 1 to 3 parts by mass of a rosin-based tackifying resin.

9. The transmission belt of claim 8 wherein the rosin-based tackifying resin is a hydrogenated rosin resin.