Tsarin Nazari don Plastik na PVC mai hana harshen wuta V-0

Tsarin Nazari don Plastik na PVC mai hana harshen wuta V-0

Domin cimma ƙimar hana wuta V-0 (bisa ga ƙa'idodin UL-94) a cikin robobi masu amfani da thermoplastic na PVC, aluminum hypophosphite da boric acid su ne abubuwa biyu da ake amfani da su wajen hana wuta. Matakan ƙara su suna buƙatar a inganta su bisa ga takamaiman tsari, yanayin sarrafawa, da buƙatun aiki. Ga wasu shawarwari da kewayon tunani:

1. Ƙarin Matakin Aluminum Hypophosphite

Aluminum hypophosphite wani abu ne mai hana harshen wuta wanda aka yi da phosphorus wanda ya dace da kayan PVC. Yana hana ƙonewa ta hanyar samar da layin phosphate mai kariya da kuma fitar da iskar gas ta phosphoric acid.

• Matakin ƙarin da aka ba da shawarar: 15–25 ph(sassa a kowace sassa ɗari na resin)
• Don ƙirƙirar PVC na yau da kullun, ƙara shi a kusa20 phrna aluminum hypophosphite yawanci yana cimma ƙimar jinkirin harshen wuta na V-0.
• Don ƙarin juriya ga harshen wuta, ana iya ƙara yawan maganin, amma ya kamata a yi la'akari da tasirin da ke kan halayen injiniya.
• Matakan kariya:
• Yawan amfani da sinadarin aluminum hypophosphite na iya rage aikin sarrafawa (misali, ƙarancin kwararar ruwa).
• Ana ba da shawarar a haɗa shi da sauran abubuwan hana harshen wuta (misali, boric acid, aluminum hydroxide) don tasirin haɗin gwiwa.

2. Ƙarin Acid na Boric

Boric acid wani abu ne mai sauƙin kashe harshen wuta wanda ke aiki ta hanyar rugujewar endothermic da kuma samar da wani tsari mai kama da gilashi.

• Matakin ƙarin da aka ba da shawarar: 5–15 phr
• Ana amfani da boric acid a matsayin maganin rage harshen wuta na biyu, kuma yawan da ya wuce kima na iya lalata halayen injiniya da sarrafawa.
• A cikin PVC, ƙara a kusa10 phrna boric acid zai iya haɗawa tare da aluminum hypophosphite don haɓaka jinkirin harshen wuta.
• Matakan kariya:
• Boric acid yana da hygroscopic, don haka ajiya da sarrafawa ya kamata a guji sha danshi.
• Tasirinsa na hana harshen wuta yana da iyaka idan aka yi amfani da shi shi kaɗai; yawanci ana haɗa shi da sauran masu hana harshen wuta (misali, aluminum hypophosphite, aluminum hydroxide).

3. Tsarin haɗin gwiwa na Aluminum Hypophosphite da Boric Acid

Domin cimma matsayin V-0, ana iya haɗa aluminum hypophosphite da boric acid don tasirin haɗin gwiwa. Ga tsarin da aka yi amfani da shi a ƙasa:

• Gilashin aluminum: 15–20 ph
• Boric acid: 5–10 phr
• Sauran ƙarin abubuwa:
• Mai amfani da filastik (misali, DOP): Kamar yadda ake buƙata (an daidaita shi bisa ga buƙatun taurin PVC)
• Mai daidaitawa:2–5 phr(misali, gishirin gubar, masu daidaita sinadarin calcium-zinc)
• Man shafawa:0.5–1 phr(misali, sitaric acid)

Misali Tsarin:

• Resin PVC:100 phr
• Gilashin aluminum:18 phr
• Borate na zinc:8 phr
• Mai sanya filastik (DOP):40 phr
• Mai daidaitawa:3 phr
• Man shafawa:0.8 phr

4. Gwaji da Ingantawa

A aikace-aikace na zahiri, ana ba da shawarar waɗannan matakai don gwaji da ingantawa:

1. Tsarin gwaji:Shirya ƙaramin gwaji bisa ga kewayon tunani.
2. Gwajin UL-94:Yi gwaje-gwajen ƙonawa a tsaye don kimanta ƙimar hana ƙonewa.
3. Gwajin Aiki:Kimanta halayen injiniya (misali, ƙarfin tauri, ƙarfin tasiri) da kuma aikin sarrafawa (misali, sauƙin kwarara, kwanciyar hankali na zafi).
4. Ingantawa:Daidaita matakan ƙara na aluminum hypophosphite da boric acid ko kuma a gabatar da wasu abubuwan hana harshen wuta (misali, aluminum hydroxide, antimony trioxide) don ƙara inganta aiki.

5. Muhimman Abubuwan Da Za A Yi La'akari Da Su

• Zafin sarrafawa:Yanayin ruɓewar aluminum hypophosphite da boric acid yana da yawa; a tabbatar da cewa zafin sarrafawa bai wuce waɗannan iyakoki ba don guje wa lalacewa.
• Watsawa:Tabbatar da cewa an rarraba na'urorin hana harshen wuta a cikin PVC iri ɗaya don hana matsalolin tattarawa na gida.
• Tasirin Muhalli:Dukansu aluminum hypophosphite da boric acid suna hana harshen wuta, amma ya kamata a tabbatar da dacewa da sauran ƙarin abubuwa.

6. Kammalawa

Domin cimma matakin rage harshen wuta na V-0 a cikin robobi masu amfani da thermoplastic na PVC, matakan ƙarin da aka ba da shawarar su ne:15-25 phr don aluminum hypophosphitekuma5-15 hr don boric acidAmfani da waɗannan na'urorin hana harshen wuta ta hanyar haɗin gwiwa na iya haɓaka aiki. A aikace, ingantawa bisa ga takamaiman tsari da buƙatun aiki yana da mahimmanci, kuma ya kamata a gudanar da gwajin UL-94 don tabbatar da ƙimar hana harshen wuta.

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