A cikin haɗewar roba, ana yin ƙarin gwaje-gwajen nakasar naƙasa na dindindin fiye da gwaje-gwajen naƙasa na dindindin. Kamar yadda za a tattauna a kasa, yawancin abubuwan da ke tattare da roba suna shafar abubuwan da suka lalace. Ya kamata a lura a nan cewa gurɓataccen gurɓataccen gurɓataccen abu da nakasar ɗimbin ɗimbin yawa abubuwa ne daban-daban guda biyu. Saboda haka, abin da ke inganta matsawa nakasar dindindin ba lallai ba ne ya inganta nakasar dindindin na tensile, kuma akasin haka. Bugu da kari, don samfuran hatimi na roba, nakasar dindindin na matsi ba kyakkyawan ma'auni bane na matsa lamba ko aikin rufewa. Yawancin lokaci, mafi wahalar gwajin shakatawa na matsananciyar damuwa shine za a yi, mafi kyawun aikin hatimin samfurin ana hasashen.
Ana amfani da ka'idojin gwaji masu zuwa don inganta aikin nakasar roba na dindindin. Lura: Waɗannan ƙa'idodi na gwaji ƙila ba za su iya aiki ba a kowane yanayi. Bugu da ƙari, duk wani canji wanda zai iya rage nakasar dindindin a cikin matsawa ko tashin hankali zai iya rinjayar wasu kaddarorin kuma ba za a magance shi a cikin rubutu ba.
1. vulcanization tsarin
Yi la'akari da yin amfani da peroxides a matsayin ma'aikatan vulcanizing, wanda zai iya samar da haɗin giciye na CC kuma don haka inganta nakasar roba ta dindindin. Vulcanization na ethylene propylene roba tare da peroxide na iya rage matsawa na dindindin nakasar roba. Fa'idodin peroxide akan sulfur shine sauƙin sarrafa peroxide da ƙarancin nakasar dindindin na roba.
2. Vulcanization lokaci da zafin jiki
Mafi girman zafin vulcanization da tsayin lokacin vulcanization na iya ƙara ƙimar vulcanization don haka rage saitin matsi na roba.
3. Ƙimar haɗin kai
Ƙara giciye da yawa na roba na iya yadda ya kamata rage matsawa dindindin nakasar roba.
4. Sulfur vulcanization tsarin
Domin rage matsawa m nakasawa na EPDM fili da kuma inganta zafi juriya, za mu iya la'akari da wannan 'low nakasawa' tsarin vulcanization (mass): sulfur 0.5PHR, ZDBC 3PHR, ZMDC 3PHR, DTDM 2PHR, TMTD3PHR.
A cikin nau'in W neoprene, amfani da diphenylthiourea accelerator zai iya sa roba tare da ƙananan matsawa nakasawa na dindindin, amma kauce wa amfani da CTP a matsayin wakili na anti-coke, ko da yake yana iya tsawaita lokacin zafi, amma yana da ƙarin lalacewa ga matsawa nakasar dindindin.
Don NBR rubber, a cikin tsarin vulcanization da aka zaɓa, ya kamata a rage adadin sulfur, gwada amfani da sulfur don ba da jiki kamar TMTD ko DTDM don maye gurbin wani ɓangare na sulfur, ƙananan sulfur abubuwa zasu inganta matsawa na dindindin nakasar aikin roba. Tsarin vulcanization tare da HVA-2 da hyposulfuramide na iya yin roba tare da ƙananan matsawa nakasawa na dindindin.
5. peroxide vulcanization tsarin
Zaɓin BBPIB peroxide zai ba roba mafi kyawun nakasar dindindin a cikin matsawa. A cikin tsarin ɓarna na peroxide, yin amfani da haɗin gwiwar haɗin gwiwar yana ƙara rashin daidaituwa a cikin tsarin, wanda hakan ke haifar da haɓakar haɓakar haɗin gwiwa, saboda ƙetarewar radicals kyauta tare da haɗin da ba a yarda da su ba yana faruwa cikin sauƙi fiye da ɗaukar hydrogen daga sarƙoƙi da aka cika. Amfani da co-crosslinkers yana canza nau'in hanyar sadarwa ta hanyar sadarwa kuma don haka yana haɓaka kaddarorin lalata na dindindin na manne.
6. bayan vulcanization
Akwai vulcanization by-products a lokacin da vulcanization tsari, da kuma post-vulcanization a matsa lamba na yanayi damar saki wadannan ta-samfurin, don haka ba da roba wani m matsawa saitin.
7. Fluoroelastomer FKM/Bisphenol AF Vulcanization
Ga fluoroelastomers, amfani da bisphenol vulcanizing wakili a maimakon peroxide vulcanizing wakili na iya ba da roba ƙananan nakasawa na dindindin a cikin matsawa.
8. Sakamakon nauyin kwayoyin halitta
A cikin dabarar roba, zaɓin roba tare da matsakaicin matsakaicin nauyin ƙwayoyin ƙwayoyin cuta na iya rage gurɓacewar nakasar roba ta dindindin yadda ya kamata.
Don roba na NBR, ya kamata a yi amfani da roba mai tsayin Mooney danko, wanda zai iya sanya robar tare da ƙananan nakasawa na dindindin.
9. Neoprene
W nau'in neoprene yana da ƙananan nakasar matsawa ta dindindin fiye da nau'in G neoprene.
10. EPDM
Don yin roba tare da ƙananan nakasawa na dindindin, yi ƙoƙarin guje wa yin amfani da robar EPDM tare da babban crystallinity.
11. NBR
NBR, wanda aka yi da emulsion polymerized tare da alli chloride a matsayin coagulant, yawanci yana da ƙananan matsawa saitin.
Don NBR roba, idan kana so ka mayar da hankali a kan ta matsawa m nakasawa yi, sa'an nan kokarin zabi iri da high reshe da high sarkar entanglement ko iri tare da low acrylonitrile abun ciki.
12. Ethylene-acrylate roba
Don rubbers na AEM, wakilai masu ɓarna peroxide na iya ba da ƙaramin saitin matsawa fiye da diamine vulcanizing agents.
13. Gudun tushen homogenizers
Guji yin amfani da homogenizers na tushen guduro a cikin mahadi na roba, saboda wannan yana ƙara saitin matsawa na fili.
14. Fillers
Rage cikawa, tsari da takamaiman yanki na filler (ƙara girman ƙwayar ƙwayar cuta) yawanci zai rage saitin matsawa. A lokaci guda, haɓaka ayyukan filler kuma yana iya inganta juriyar saiti na fili.
15. Siliki
Ƙananan silica filler a cikin fili zai rage saitin matsawa. Domin samun ƙananan matsawa, ya zama dole don kauce wa babban cikawa na silica. Idan yawan cikon ya fi sassa 25 (ta hanyar taro), nakasar daɗaɗɗen fili ta zama babba.
16. Silane coupling agent
Yin la'akari da yin amfani da wakili na haɗin gwiwar silane a cikin babban adadin silica mai girma, za'a iya rage nakasar mannewa ta dindindin. Silane hada biyu wakili na iya rage matsawa dindindin nakasar silica cike roba, da kuma rage matsawa dindindin nakasawa na silicate irin filler kamar yumbu, talcum foda da sauran cika roba.
17. Plasticizers
Rage adadin cika na roba a cikin roba zai yawanci rage matsawa na dindindin nakasar roba.
