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Gabatarwa: Magance Kalubalen Sarrafa Haɗaɗɗun Polyolefin Masu Hana Wutar Lantarki ATH/MDH Masu Yawan Lodi

A cikin masana'antar kebul, ƙa'idodi masu tsauri don hana harshen wuta suna da mahimmanci don tabbatar da amincin ma'aikata da kayan aiki idan gobara ta tashi. Ana amfani da aluminum hydroxide (ATH) da magnesium hydroxide (MDH), a matsayin masu hana harshen wuta marasa halogen, sosai a cikin mahaɗan kebul na polyolefin saboda kyawun muhalli, ƙarancin hayaki, da kuma fitar da iskar gas mara lalatawa. Duk da haka, cimma aikin da ake buƙata na hana harshen wuta sau da yawa yana buƙatar haɗa manyan nauyin ATH da MDH—yawanci 50-70% ko sama da haka—a cikin matrix na polyolefin.

Duk da cewa irin wannan babban abun cikewa yana ƙara yawan jinkirin wuta, yana kuma haifar da ƙalubalen sarrafawa masu tsanani, gami da ƙaruwar narkewar narkewa, raguwar kwararar ruwa, lalacewar halayen injiniya, da rashin ingancin saman. Waɗannan matsalolin na iya takaita ingancin samarwa da ingancin samfura sosai.

Wannan labarin yana da nufin yin nazari kan ƙalubalen sarrafawa da ke tattare da haɗakar polyolefin mai hana harshen wuta na ATH/MDH mai yawan aiki a aikace-aikacen kebul. Dangane da ra'ayoyin kasuwa da gogewa a aikace, yana dayana gano mai tasirisarrafawaƙarin abubuwadonmagance waɗannan ƙalubalen. An yi nufin fahimtar da aka bayar don taimaka wa masana'antun waya da kebul su inganta tsari da kuma inganta hanyoyin samarwa yayin aiki tare da mahaɗan polyolefin masu hana harshen wuta na ATH/MDH masu nauyi.

Fahimtar Masu Hana Wutar Lantarki ATH da MDH

ATH da MDH manyan sinadarai guda biyu ne masu hana harshen wuta marasa halogen, waɗanda ake amfani da su sosai a cikin kayan polymer, musamman a aikace-aikacen kebul inda aminci da muhalli suke da yawa. Suna aiki ta hanyar rugujewar endothermic da sakin ruwa, suna narkar da iskar gas mai ƙonewa da kuma samar da wani Layer na oxide mai kariya a saman kayan, wanda ke hana ƙonewa da rage hayaki. ATH yana rugujewa a kusan 200–220°C, yayin da MDH yana da mafi girman zafin jiki na rugujewa na 330–340°C, wanda hakan ke sa MDH ya fi dacewa da polymers da aka sarrafa a yanayin zafi mafi girma.

1. Hanyoyin hana harshen wuta na ATH da MDH sun haɗa da:

1.1. Rushewar Endothermic:

Bayan dumamawa, ATH (Al(OH)₃) da MDH (Mg(OH)₂) suna fuskantar rugujewar endothermic, suna shan zafi mai yawa kuma suna rage zafin polymer don jinkirta lalacewar zafi.

ATH: 2Al(OH)₃ → Al₂O₃ + 3H₂O, ΔH ≈ 1051 J/g

MDH: Mg(OH)₂ → MgO + H₂O, ΔH ≈ 1316 J/g

1.2. Sakin tururin ruwa:

Tururin ruwa da aka saki yana narkar da iskar gas mai kama da wuta a kusa da polymer kuma yana hana isa ga iskar oxygen, yana hana konewa.

1.3. Samar da yadudduka masu kariya:

Abubuwan da ke haifar da ƙarfe oxides (Al₂O₃ da MgO) suna haɗuwa da layin polymer char don samar da wani kariyar kariya mai yawa, wanda ke toshe hanyar shiga zafi da iskar oxygen kuma yana hana fitar da iskar gas mai ƙonewa.

1.4. Dakatar da hayaki:

Tsarin kariya yana kuma shanye ƙwayoyin hayaƙi, yana rage yawan hayaƙin gaba ɗaya.

Duk da kyakkyawan aikinsu na hana harshen wuta da kuma fa'idodin muhalli, cimma babban matakin hana harshen wuta yawanci yana buƙatar kashi 50-70% ko fiye na ATH/MDH, wanda shine babban dalilin ƙalubalen sarrafawa daga baya.
2. Kalubalen Sarrafawa na Polyolefins na ATH/MDH masu Yawan Lodi a Aikace-aikacen Kebul

2.1. Lalacewar halayen rheological:

Yawan nauyin cikawa yana ƙara danko na narkewa sosai kuma yana rage yawan kwarara. Wannan yana sa plasticization da kwararar ruwa yayin fitar da ruwa su fi wahala, yana buƙatar yanayin zafi mai yawa da ƙarfin yankewa, wanda ke ƙara yawan amfani da makamashi da kuma hanzarta lalacewar kayan aiki. Rage yawan narkewar ruwa kuma yana iyakance saurin fitarwa da ingancin samarwa.

2.2. Rage halayen injiniya:

Yawan cikawa marasa tsari yana rage ƙarfin tururin polymer, yana rage ƙarfin tururin, tsawaitawa a lokacin karyewa, da kuma ƙarfin tururin. Misali, haɗa ATH/MDH 50% ko fiye na iya rage ƙarfin tururin da kusan kashi 40% ko fiye, wanda hakan ke haifar da ƙalubale ga kayan kebul masu sassauƙa da dorewa.

2.3. Matsalolin warwatsewa:

Barbashi na ATH da MDH galibi suna taruwa a cikin matrix na polymer, wanda ke haifar da wuraren tattara damuwa, rage aikin injina, da lahani na fitarwa kamar ƙaiƙayi ko kumfa.

2.4. Rashin ingancin saman:

Yawan narkewar narkewa, rashin kyawun watsawa, da kuma ƙarancin jituwa tsakanin filler da polymer na iya sa saman extrude ya zama mai kauri ko mara daidaituwa, wanda ke haifar da tarin "sharkskin" ko kuma taruwar mutu. Tarin da ke wurin die (die drool) yana shafar bayyanar da ci gaba da samarwa.

2.5. Tasirin kadarorin lantarki:

Yawan abubuwan da ke cikewa da kuma watsawa mara daidaito na iya shafar halayen dielectric, kamar juriyar girma. Bugu da ƙari, ATH/MDH yana da yawan shan danshi, wanda zai iya shafar aikin lantarki da kwanciyar hankali na dogon lokaci a cikin yanayin danshi.

2.6. Tagar sarrafawa mai kunkuntar:

Yanayin zafin da ake sarrafawa na polyolefins masu yawan ɗaukar wuta yana da kunkuntar. ATH yana fara ruɓewa kusan 200°C, yayin da MDH ke ruɓewa kusan 330°C. Ana buƙatar daidaitaccen tsarin kula da zafin jiki don hana ruɓewa da wuri da kuma tabbatar da aikin hana wuta da kuma ingancin kayan.

Waɗannan ƙalubalen sun sa sarrafa polyolefins masu nauyi mai yawa na ATH/MDH ya zama mai rikitarwa kuma yana nuna buƙatar ingantattun kayan aikin sarrafawa.

Don haka, don magance waɗannan ƙalubalen, an ƙirƙiri kuma an yi amfani da kayan aikin sarrafawa daban-daban a masana'antar kebul. Waɗannan suna taimakawa wajen inganta jituwa tsakanin polymer-filler interfacial, rage narkewar danko, da haɓaka watsawar filler, yana inganta aikin sarrafawa da kuma halayen injiniya na ƙarshe.

Wadanne kayan aikin sarrafawa ne suka fi tasiri wajen magance matsalolin sarrafawa da ingancin saman mahaɗan polyolefin masu ɗauke da ATH/MDH masu hana harshen wuta a aikace-aikacen masana'antar kebul?

Ƙarin abubuwa da kayan aikin samarwa da aka yi da silicone:

SILIKE yana ba da zaɓuɓɓuka iri-irikayan aikin sarrafawa bisa polysiloxanedon duka na'urorin thermoplastics na yau da kullun da na injiniyanci, suna taimakawa wajen inganta sarrafawa da haɓaka aikin samfuran da aka gama. Maganganunmu sun kama daga amintaccen silicone masterbatch LYSI-401 zuwa sabon ƙari na SC920 - wanda aka ƙera don samar da ingantaccen aiki da aminci a cikin LSZH mai ɗaukar nauyi mai yawa, mara halogen da fitarwar kebul na HFFR LSZH.

Musamman,Ƙarin kayan sarrafa man shafawa na SILIKE UHMW da aka yi da siliconeAn tabbatar da cewa yana da amfani ga mahaɗan polyolefin masu hana harshen wuta na ATH/MDH a cikin kebul. Manyan illolin sun haɗa da:

1. Rage danko na narkewa: Polysiloxanes suna ƙaura zuwa saman narkewa yayin sarrafawa, suna samar da fim mai shafawa wanda ke rage gogayya da kayan aiki kuma yana inganta kwararar ruwa.

2. Ingantaccen yaɗuwa: Ƙarin da aka yi da silicon yana haɓaka rarrabawar ATH/MDH iri ɗaya a cikin matrix na polymer, yana rage tarin ƙwayoyin cuta.

3. Ingantaccen ingancin saman:Babban rukunin silicone na LYSI-401yana rage taruwar gawawwaki da kuma narkewar karyewar gawawwaki, yana samar da santsi a saman extrude tare da ƙarancin lahani.

4. Saurin gudu a layi:Taimakon Sarrafa Silicone SC920ya dace da fitar da kebul cikin sauri. Yana iya hana rashin daidaiton diamita na waya da zamewar sukurori, da kuma inganta ingancin samarwa. A daidai wannan lokacin amfani da makamashi, yawan fitarwa ya karu da kashi 10%.

5. Ingantaccen halayen injiniya: Ta hanyar haɓaka watsawar cikawa da mannewa a tsakanin fuskoki, silicone masterbatch yana inganta juriyar lalacewa da aikin injiniya, kamar halayen tasiri da tsawaitawa a lokacin hutu.

6. Haɗin kai tsakanin masu hana harshen wuta da kuma rage hayaki: ƙarin siloxane na iya ɗan ƙara ƙarfin aikin hana harshen wuta (misali, ƙara LOI) da kuma rage fitar da hayaki.

SILIKE babbar mai samar da ƙarin sinadarai da aka yi da silicone, kayan aikin sarrafawa, da kuma elastomers na silicone na thermoplastic a yankin Asiya da Pacific.

NamuKayan aikin sarrafa siliconeAna amfani da su sosai a masana'antar thermoplastics da kebul don inganta sarrafawa, inganta watsawar cikawa, rage narkewar narkewa, da kuma samar da saman da ya fi santsi tare da ingantaccen aiki.

Daga cikinsu, silicone masterbatch LYSI-401 da kuma sabuwar fasahar sarrafa silicone ta SC920 mafita ce da aka tabbatar don samar da polyolefin mai hana harshen wuta na ATH/MDH, musamman a cikin fitar da kebul na LSZH da HFFR. Ta hanyar haɗa ƙarin kayan haɗi da kayan aikin samarwa na SILIKE, masana'antun za su iya cimma ingantaccen samarwa da inganci mai daidaito.

If you are looking for silicone processing aids for ATH/MDH compounds, polysiloxane additives for flame-retardant polyolefins, silicone masterbatch for LSZH / HFFR cables, improve dispersion in ATH/MDH cable compounds, reduce melt viscosity flame-retardant polyolefin extrusion, cable extrusion processing additives, silicone-based extrusion aids for wires and cables, please visit www.siliketech.com or contact us at amy.wang@silike.cn to learn more.