Crosslinked polyethylene: ngwa na e ji mara

Polyethylene bụ a ihe a na-eji dị iche iche ọrụ. Ngwaahịa si ya na-eji na-adị kwa ụbọchị ndụ. Common polyethylene retains ya ike ruo 130 degrees. Otú ọ dị, ọ bụ mgbe mkpa na-eji nke a ihe onwunwe, na na ndị ọzọ siri ike na ọnọdụ na a elu okpomọkụ na nsogbu, n'ihi na ihe atụ na kpo oku usoro na mmiri ọkụ.

Mkpa a emeela ka search ụzọ nweta a ọzọ inogide ihe onwunwe. Hụrụ technology n'agụmakwụkwọ crosslinked polyethylene, nke nwere nnukwu molekụla ibu ka tụnyere na ot ihe onwunwe, na mma e ji mara. Site n'ijikọ ịghọta usoro nke njikọ ụmụ irighiri ruru ka e guzobere cross-njikọ-ejikọrọ na a atọ akụkụ okporo shirokoyacheistuyu.

Dabere na etinyere mmetụta iche chemical na n'ụzọ anụ ahụ crosslinking. Na nke ikpeazụ ahụ, anwụrụ (cross-jikọrọ polyethylene na-eji ike ihe nke data) na ụzarị ọkụ X-ụzarị isiike. Nke a technology bụ nnọọ na-arụpụta, na a nkeji i nwere ike inwe ruo 80 mita nke ihe onwunwe.

A mwepu nke usoro a bụ na ndị crosslinked polyethylene nwere mkpumkpu ọkpụrụkpụ nke ọjà. Na n'ime amama kasị ala pasent nke compound ụmụ irighiri ihe, na na na n'èzí, na Kama nke ahụ, ndị kasị elu. Ntem, dị iche iche Njirimara na ngwaahịa ke nnukwu. N'ihi bụ a crosslinked polyethylene Atiya C (PEX).

Mgbe na-eji a chemical usoro maka nnọchi nke hydrogen atọm na ụmụ irighiri na-eji pụrụ iche umi silane. Ntem, a silane crosslinked polyethylene. Ke imewe nke ọkpọkọ gabiga a pụrụ iche bath jupụtara umi. Nke a na-enye ohere ime ka edo crosslinking usoro nke na n'ime na elu na-ebupụta nke na-anwụrụ mgbidi ke omimi. Nke a technology na-eme ka o kwe omume na-enweta ndị na anwụrụ na a elu pasent nke nhazi, na ihe onwunwe ẹkedọhọde PEX-B.

E nwere a usoro nke nhazi polyethylene nitrogen radicals ewepụtara ihe onwunwe e ẹkedọhọde PEX-D. Otú ọ dị, nke a technology bụghị ọdabara n'ihi na ala arụmọrụ.

Ọzọkwa ịrụ cross-ejikọ peroxides. Na nke a, mmepụta usoro mejupụtara agwakọta nke peroxide na polyethylene, mgbe ahụ, na a wụrụ awụ ala na n'okpuru elu okpomọkụ nwetara crosslinked polyethylene PEX-A otu.

Conduits ihe (iche iche B, C) eji maka mmiri na kpo oku, Otú ọ dị, ha nwere ọtụtụ na-agaghị emeli nke metụtara ike na ductility ngwaahịa.

Ihe ịga nke ọma bụ ọkpọkọ mere nke polyethylene otu A, ha nwere nnukwu ike ọgwụgwụ ike, ịgbawa eguzogide, akụkụ kwụsiri ike, na mgbanwe, ntachi obi na-akpata.

Heating PEX ọkpọkọ na n'ọtụtụ ebe, ji mee ihe maka onye, obodo na ulo oru na-ewu. Na enyemaka ha na-ebu Ft okpomọkụ ahụ okirikiri nhọrọ ukwuu na ike a n'ala kpo oku usoro.