Te hītori whanaketanga o ngā putea whatu PP

Ko ngā putea whatu polypropylene (PP), hei rauemi tākai nui, kua whānuitia te whakamahinga i te mākete i ngā tau tata nei, inā koa i roto i te kawe me te rokiroki i ngā taonga papatipu. Ko te hītori o ngā putea whatu PP ka taea te whai i ngā tau 1950, i te wā i whakatakotohia ai te turanga mō te hanga putea whatu nā te hanganga o ngā rauemi polypropylene. Nā te whanaketanga tonu o te hangarau, kua āta pakeke haere te tukanga hanga putea whatu PP, ā, kua hangaia ngā momo putea whatu e mōhiotia ana e tātou i ēnei rā.

I ngā rā o mua, ko ngā putea whatu PP te nuinga o te wā i whakamahia i roto i ngā ahumahi ahuwhenua me te hanga. I te pikinga ake o te tono mākete, ka tīmata ngā kaihanga ki te whakawhanake i ngā hua he nui ake te kaha, arā, ko ngā putea papatipu. Ko ngā putea papatipu te tikanga e whakamahia ana hei kawe me te penapena i ngā rauemi papatipu, pērā i ngā maniua, te witi, me ngā kohuke. He painga ō rātou ko te kaha ki te kawe kawenga, te ātete ki te kakahu, me te ātete ki te haehae. Nā tō rātou putanga mai kua tino pai ake te pai o te kawe me te whakaiti i ngā utu kawe.

I te taenga mai o te rautau 21, kua whānui haere tonu te whānuitanga o ngā putea whatu PP. Haunga ngā ahumahi ahuwhenua me te hanga tuku iho, kua tīmata hoki te whakamahi whānuitia o ngā putea whatu PP i roto i ngā mara kai, matū, rongoā me ētahi atu mara. I te piki haere o te mōhiotanga ki te tiaki taiao, kua tīmata te maha o ngā kaihanga ki te tūhura i ngā rauemi pirau me ngā putea whatu PP hangarua hei whakatutuki i te hiahia o te mākete mō ngā hua e pai ana ki te taiao.

I te nuinga o te wā, ko te hītori whanaketanga o ngā putea whatu PP me ngā putea papatipu e whakaata ana i te ahunga whakamua o te pūtaiao rauemi me te hangarau whakaputa. I te heke mai, me te whanaketanga tonu o te pūtaiao me te hangarau, ka nui ake te kanorau o ngā mahi me ngā wāhi tono o ngā putea whatu PP, ā, ka noho hei wāhanga nui o te umanga tākai hou.