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 whakarara 8.0:1. Ahakoa rā, 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 i te kiriata whakaheke 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