Rubber active agent inozivikanwawo se vulcanizing active agent. Inorganic kana organic substance inoshandiswa kuita vulcanization accelerator ishande. Inogona kuwedzera huwandu hweiyo accelerator, kuderedza huwandu hweanomhanyisa, uye kupfupisa iyo vulcanization nguva. Zvizhinji zvezvizhinji zvekuwedzera ndeyesimbi oxides, hydroxides uye basic carbonates, senge zinc oxide, lead oxide, calcium hydroxide, lead carbonate, zvichingodaro, chinhu chinonyanya kukosha muorganic additives mafuta acids, anoteverwa nemaamine, sipo, etc. Senge stearic acid, dibutyloleic acid amine, zinc stearate, etc. iri pasi pe5% yehuremu hwerabha.

Rubber Additives: Detailed Properties, Advantages, uye Applications

1. Zinc Oxide (ZnO)

Properties:

• Muchena, hupfu husina hwema hune simba rinokwevera pamusoro (5.6 g/cm³).

• Kunyungudika: 1,975°C; refractive index: 2.008–2.029.

• High reactivity se vulcanization activator.

• UV-blocking uye antimicrobial properties.

Zvakanakira:

• Inowedzera sulfur vulcanization (inoderedza nguva yekurapa ne20-30%).

• Inovandudza ma mechanical properties (tensile simba +15-25%, elongation panguva yekuzorora + 10-15%).

• FDA-yakatenderwa yekudya-kusangana kunyorera (21 CFR 172.480).

• Yakanaka zvakatipoteredza (isina chepfu, inogona kushandiswazve).

Applications:

• Matai: Simbi-belt radial tire zvitunha (inosimudzira adhesion pakati rabha nesimbi).

• Shangu: Outsole makomisheni (inovandudza abrasion kuramba, ASTM D5963: 50-80 mm³ kurasikirwa).

• Kurapa: Magurovhosi ekuvhiya (antimicrobial protection, ASTM E2149).

• Adhesives: Rubber-to-metal bonding (inowedzera peel simba ne30-40%).

2. Phenolic Resin

Properties:

• Thermosetting polymer ine high crosslink density.

• Kudzivirira kupisa: Kuramba kuchishandiswa kusvika ku180 ° C (kupindira 250 ° C).

• High rigidity (modulus: 2-4 GPa) uye dimensional kugadzikana.

• Kemikari kuramba kune acid, mabhesi, uye zvinonyungudutsa.

Zvakanakira:

• Inopa kusimbiswa kwechimiro (inowedzera kuomarara ne10-20 Shore A).

• Flame retardant (UL94 V-0 chiyero pasina halogen additives).

• Mutengo-unoshanda kana uchienzaniswa nehunyanzvi thermoplastics.

• Customizable kurapa masisitimu (asidhi-catalyzed kana kupisa-yakagadziriswa).

Applications:

• Matai: Sidewall komisheni (inovandudza kucheka kushorwa, ASTM D624).

• Industrial Belts: Conveyor mabhandi epamhepo-tembiricha nharaunda (semuenzaniso, simende zvirimwa).

• Friction Materials: Brake pads (inochengetedza coefficient ye friction pa 0.35-0.45 pasi pe200 ° C).

• Foundry: Core sand binders (inoderedza kushanduka kwegasi panguva yekukanda).