1. United States wɔ 1988 mu no, rɔba a ɛma nneɛma kɔ ntɛmntɛm no yɛ nea edi kan wɔ wiase .
1.1 di gua a ɛfa rɔba a wɔde ka ho so .
Wɔ 1988 mu no, United States yɛ wiase no mu kar wuranom kɛse, ne nea ɛyɛ tae a ɛsen biara, wiase no mu rɔba a edi kan a wɔde di dwuma, rɔba a ɛma ɛyɛ ntɛmntɛm a wɔyɛ nso dii kan wɔ wiase. wɔ 1988 mu, United States dii 2{8}}88 ɔpepem ton ɔpepem pii wɔ rɔba mu, ne rɔba a wɔde ka ho (a rɔba a wɔde ka ho (a 1600000000000000000000000 ka ho Nnuru a ɛko tia onyin tɔn 100000).
1.2 Nnwumayɛbea pii wɔ hɔ ma rɔba mmoa .
More than 20 factories, the production of nearly 200 varieties of rubber additives. The main varieties are benzothiazole accelerators and p-phenylenediamine anti-aging agents. The yield of thiazole sulfonamide products is the largest, accounting for 72% of the accelerators. Amine anti-aging agent accounted for 61%. Top 5 rubber accelerator factories: 1. Monsanto 50000 tɔn, 2. Goodyear 42000 tɔn, 3. Guttridge 20000 tɔn, 4. uniroy 19000000000000000000000000000 ton, {{200000000000000000000000
1.3 Nhwehwɛmu akwankyerɛ a ɛfa rɔba a wɔde ka ho ho .
United States yɛ nnam yiye wɔ nhwehwɛmu a wɔyɛ wɔ rɔba a wɔde ka ho no mu, nhoma ahorow a wɔde di dwuma ho tumi krataa dodow bi wɔ hɔ a wotintim no afe biara, nhoma ahorow nyinaa a wɔaka abom no hui sɛ nhwehwɛmu akwankyerɛ titiriw a ɛwɔ United States nneɛma a wɔde ka ho no mu ne : nea edi kan no, nhwehwɛmu a wɔyɛ wɔ rɔba a wɔde ka ho a eye kyɛn so ho; Nea ɛto so abien no, ɛsɛ sɛ wosi nhwehwɛmu a ɛfa awuduru ne ahobammɔ a ɛwɔ nneɛma a wɔyɛ ho no so dua. nea ɛto so abiɛsa no, ma rɔba a wɔde yɛ adwuma no yɛ adwuma yiye.
Saa bere no, China rɔba a wɔde ka ho nnwuma no wɔ nkɔso mfiase wɔ 1980 mfe no mu, a na ɛne China sikasɛm ne kar nnwuma nkɔso. hyia nanso rɔba boafo adwumayɛbea, nea efi mu ba, ahorow no, nhwehwɛmu no nyɛ pii, nea wɔyɛ no nso de wɔn adwene si so wɔ Shenyang, Tianjin, jiangsu, henan{