Ko te kiriata polypropylene whakahāngai rua (BOPP) he momo kiriata takai ngāwari. Ka totorohia te kiriata takai polypropylene whakahāngai rua i ngā taha mīhini me ngā taha whakawhiti. Ko te hua o tēnei he mekameka ngota i ngā taha e rua.
Ka hangaia tēnei momo kiriata takai ngāwari mā te tukanga whakaputa ngongo. Ka pupuhihia he mirumiru kiriata āhua ngongo, ka whakamahanahia ki tōna pūwāhi whakangawari (he rerekē tēnei i te pūwāhi rewa) ā, ka totorohia ki te mīhini. Ka totoro te kiriata i waenga i te 300% – 400%.
Heoi anō, ka taea hoki te totoro i te kiriata mā te tukanga e mōhiotia ana ko te hanga kiriata anga-tītaha. Mā tēnei tikanga, ka tukuna ngā pūmua ki runga i tētahi rōra whakarewa kua whakamataotia (e mōhiotia ana ko te pepa turanga) ka tōia i te ahunga mīhini. Ka whakamahia e te hanga kiriata anga-tītaha ētahi huinga rōra hei hanga i tēnei kiriata.
Ko te tukanga anga-tenter te tikanga ka totoro te kiriata i te ahunga mīhini 4.5:1 me te ahunga whakawhiti 8.0:1. Heoi anō, ka taea te whakarite i ngā ōwehenga.
He mea noa ake te tukanga anga-tenter i te momo ngongo. Ka puta he kiriata kanapa, mārama hoki. Ka whakanui ake te aronga rua-tuaka i te kaha, ā, ka hua ake he pakari pai ake, he mārama ake, me te ātete nui ki te hinu me te ngako.
He nui ake hoki ngā āhuatanga ārai o te kiriata BOPP ki te kohu me te hāora. He pai ake te ātete ki te pānga me te pakaru ngāwari me te BOPP, ki te kiriata whakaiti polypropylene.
Ko ngā kiriata takai polypropylene e rua-axial te mea e whakamahia whānuitia ana mō ngā takai kai. Kei te tere whakakapi i te cellophane mō ngā mahi tae atu ki ngā takai kai me te tupeka. Ko te take matua o tēnei ko ō rātou āhuatanga pai me te utu iti.
He maha ngā kamupene e whiriwhiri ana ki te whakamahi i te BOPP hei whakakapi i ngā kiriata whakaiti tuku iho nā te mea he pai ake ngā āhuatanga me ngā āheinga o ēnei kiriata i ērā o ngā kiriata takai ngāwari paerewa.
Me mōhio he uaua te hiri wera mō ngā kiriata BOPP. Heoi, ka taea te whakangawari ake i tēnei mā te pani i te kiriata i muri i te tukatuka ki tētahi rauemi hiri-wera, mā te whakakotahi rānei me tētahi co-polymer i mua i te tukatuka. Ka hua ake he kiriata maha-paparanga.
Wā tuku: Paenga-whāwhā-04-2023