PP (Polypropylene) he matera whakarawe mō ngā waka pītiti kua hinga i te tūranga, nā runga i ana āhuatanga pai. Nō reira, ngā waka pītiti iti iti ake nei i te matera PP ki roto i te Tāhuhu Mahi Mātauranga Hauora o Jiangsu Changfeng, he horahanga, he whai wānanga, me te whiu ki ngā momo rongoā. He tono pai nō rātou mō te whakatauira me te whakawhiu i ēnei rite ā - tuhinga, inahea ko ngā rongoā e kore ana i te kawe koromiko, ngā mahi whakatika, me ngā mea tirotiro hauora. Ko te matera PP he kore - taetokerau hoki, me te pai hei whakamahi i te tūhononga ki te tinana o te tangata, ka whakaae he pai mō ngā whakahaere hauora me ngā whakahaere rongoā. Ka whakawai anō ēnei waka ki ngā āhua me ngā rahi katoa, ka tuku atu he rangitaki nui ki ngā hiahia kaimahi. Nā reira, ka ora anō hoki i te hanga iho, he pai rawa.