Anhte a overshoes hte rubber shoes ni gaw n-gun ja ai hte n-gun n rawng ai hte n-gun n rawng mat na re. Ndai mabyin hpe rubber. ngu ai hku nna, Rubber asak kaba wa ai gaw grai yak hkak ai manghkang langai mi rai nga ai. Madung hku nna, oxidation, jan a nhtoi hte nbung katsi ai lam ni a majaw, rubber hpe asak hte asak du hkra byin shangun chye ai.
Dai mare gaw Dingda Amerika mungdan rai nna, buga na Indian ni gaw hpun a myi prwi hpe tsun ma ai. hpa majaw nga yang, rubber hpun a hkum hkrang hpe gang je kau ai majaw, hpraw ai latex gaw myi prwi pru let hpun zawn pru wa na re. Shawng nnan hta, masha ni gaw latex de acetic acid loi mi bang nna, ngang kang ai arung arai a n-gun langai mi de shinggrup da ai. n-gun gaw n-gun n rawng ai. gaw n-gun n rawng ai raitim, n-gun rawng ai lam hpe dawm kau na matu loi ai. Nbung katsi ai lam galai shai wa ai hpe grau nna hkam sha chye ai, katsi ai gaw n-gun ja ai hte n-gun ja wa na re, katsi ai gaw yak wa na re hte n-gun n rawng ai lam byin wa na re{{6} Rubber galaw ai hpun ni hta, masha ni gaw sulfur hpe rawt malan hpang wa ai shaloi, raw rubber molecule hpe langai hte langai matut mahkai ya lu ai. rubber molecules ni gaw network hkrang langai byin wa ai, dai hku nna rubber. ngu ai rubber hpe grai jat shangun ai hta n-ga, n-gun n rawng ai tsi langai, nsam galai ai agent langai, n-gun ja ai agent langai, n-gun ja shangun ai tsi langai, filler langai, antioxidant langai, hte dai zawn re ai ni hpe jat bang ai.
Dai jan hta ultraviolet nhtoi law law lawm ai, dai hta n-ga, ultraviolet nhtoi ni hpe n-gun jaw lu ai hta n-ga, "pecker." Dai hpe mung, rubber arung arai kata de htu bang ai shaloi, rubber a molecular chain hpe gang je kau nna, dai aten hta sha, jan a n-gun kaba gaw, hka lim ai hpe raw rubber kaw na garan ginhka kau nna, shi a molecular hpe jahten kau na re. structure. a majaw, rubber gaw shi a elasticity hte intermolecular bond hpe sum mat ai majaw, n-gun yawm mat ai..
Dai majaw, overshe hte rubber shoes ni hpe lai nna, kalang ta kashin kau ai shaloi, nsin sin ai hte nbung n-gun rawng ai shara hta katsi mat hkra tawn da ai, jan hpe n-hkap la ai, wan wut ai shara kaw n-gun n-jaw ai sha, kerosene hte gasoline hpe hkum hkra ai, hpa majaw nga yang, sau sau ni hpe rubber molecule ni de htu bang nna, rubber molecule ni hpe jat wa nna, rubber shoes ni hpe n-gun hte n-gun n-gun shayawm kau na matu, n-gun n-gun hte n-gun n-gun n-nga hkra galaw ya na re.