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1.1 Rubber additives ni a gat lawk hpe uphkang na
1988 ning hta, Amerikan mungdan gaw mungkan hta kaba dik htum mawdaw madu ni rai nga ai, mungkan hta shawng ningnan lang na rubber lang ai lam, rubber accelerator galaw ai lam mung mungkan hta shawng nnan nga ai. 100000 tons hta asak kaba sai ni hpe n-gun jaw ai.
1.2 Rubber auxiliaries ni a matu jak rung law law nga ai
20 jan na jak rung ni hta, rubber additives amyu 200 daram hpe galaw shapraw ai. a madung amyu ni gaw benzothiazole accelerators ni hte p-p-henylenediamine hpe ninghkap ai tsi ni a n-gun rawng ai ni a hkai lu hkai sha ai lam gaw kaba dik htum rai nna, 72% hpe hkap la ai ni hpe ninghkap ai tsi ni a matu jahpan hta lawm ai. 61%{10}} Top 5 rubberator jak rung ni: 1. Monsanto 50000 tons, 42000 tons,3. Guttridge 20000 tons,4. Na 20000 tons,4. Uniroy ton law..
1.3 Rubber jat bang ai lam ni hpe sawk sagawn ai lam
Rubber additives ni hpe sawk sagawn ai lam hta Amerikan mungdan gaw grai atsam rawng ai, shaning shagu patent laika buk law law hpe shapraw ai, laika buk amyu myu hpe shingdaw yu yang, Amerikan mungdan a additives ni a madung sawk sagawn ai lam gaw : langai ngu na hta, grai kaja ai rubber additives ni a sawk sagawn bungli galaw ai lam hpe mu lu ai; Lahkawng ngu na hta, n kaja ai lam hte galaw shapraw ai lam a shimlum lam hte seng ai sawk sagawn ai lam ni hpe ahkyak shatai nna. Masum, rubber galaw shapraw ai bungli galaw ai lam hpe grau kaja hkra galaw ra ai.}.
Dai aten hta, Miwa mungdan a rubber additives hpaga lam gaw 1980 ning daram hta rawt jat galu kaba lam a npawt nhpang hta rai nga ai, dai gaw Miwa mungdan a sut masa hte mawdaw hpaga lam rawt jat galu kaba wa ai lam hte maren rai nga ai.