Cov teeb meem uas yuav tsum tau them sai sai rau hauv kev teeb tsa thiab kev tsim kho cov kav dej PEX: PEX cov kav dej muaj zog qis dua thiab tsis muaj zog dua li cov kav hlau hlau, thiab yuav tsum muaj kev tiv thaiv kom zoo thaum tuav, kev tsim kho thiab kev teeb tsa tom qab cov yeeb nkab kom tsis txhob muaj kev tsim kho thiab kev puas tsuaj. . Hauv particular, txoj hauj lwm ntawm lub raj xa dej yuav tsum tau cim tom qab tsaus nti, kom tsis txhob muaj kev puas tsuaj rau cov kav dej thaum lub sij hawm kho kom zoo nkauj thib ob; PEX yeeb nkab yog nkig ntawm qhov kub qis (qis dua 5 degree), yog li ceev faj thaum siv lub caij ntuj no, thiab siv rab riam ntse los txiav kom maj mam thaum txiav cov yeeb nkab. . Cov kav dej uas tau nruab yuav tsum tsis txhob nias los yog khob, thiab yog tias tsim nyog, npog qhov chaw uas yooj yim cuam tshuam los ntawm sab nraud quab yuam; PEX cov kav dej tau yooj yim degraded los ntawm lub sij hawm ntev ultraviolet hluav taws xob, thiab yuav tsum tau muab qhwv nrog ib txheej tiv thaiv tsaus ntuj los yog ib tug tsaus nti tiv thaiv txheej thaum ntsia sab nraum zoov los yog nyob rau hauv ncaj qha tshav ntuj. Siv cov tshuaj tiv thaiv ultraviolet.
