Eby’okurya bya PVC eby’omuhendo SG3, SG5, SG7: Enkora y’okushoboorora enshonga z’amakorero kuruga aha muheru kuhika aha muheru

Enkora ya molekyu & Emitwarize y'omubiri

SG3 (Ekicweka ky‘ahaiguru - eky‘okuhindurahindura)
Ekozirwe n’ekipimo ky’okuhindura ebiriisa 1300 - 1500 na K - omuhendo gwa 70 - 72, omutindo ogu gwine enjegyere z’ebicweka by’omubiri eziraingwa ezirikwongyera aha kukwatwa kw’ebintu ebirikukora ebiriisa. Okugabwa kwayo kw’ebicweka 60 - 250μm nikuhamya okujanjaara okurikushushana omu nkora z’ebirungo ebigumire, ekirikubaasisa 25 - 35g y’okunywanisa kw’ekirungo kya pulasitiki ahari 100g y’ekirungo. Omubumbi ogurikuruga omu nkora ya amorphous niguha okutunguuka kw’omutaano omu kuhenda, ekirikugihindura nungi aha bintu ebirikwetenga kugarukagaruka kuhendagura hatariho kuhendagura.

SG5 (Omugati gw'ebintu bingi - Ekibiina)
Okugyeragyeranisa diguri y‘okukora ebiriisa 1000 - 1100 n‘omuhendo gwa K - ogwa 65 - 67, SG5 neeha omwanya gwa rwagati ogw‘amaani. Obuhango bwayo obuhikire (0.45 - 0.58g/mL) nibuhwera omu kugyendera gye kw’okusheenya omu kusheenya n’okusheenya, obwo okunywanisa kw’epulasitiki okuri ahagati (20 - 28g/100g) kurikubaasisa okuhinduka kuruga omu nkora z’ebikwato ebigumire kuza omu nkora z’ebikwato ebigumire. Okugumaho kw’orujegyere rwa molekyu nikukyendeeza oburemeezi omu kukora, kuhamya obuhango bw’ekisiika obutarikuhinduka omu kushohora kw’emipiira.

SG7 (Ekicweka kya Inginiya ekigumire)
Omuri 700 - 850 n’omuhendo gwa K - 60 - 62, SG7 neeyebembeza oburungi bw’okupakira molekyu ahabw’okuguma. Omuringo gwayo gw‘ebicweka 40 - 180μm (oburemeezi 0.50 - 0.62g/mL) nigukyendeeza aha busha omu bicweka ebibumbirwe, kwongyera aha kugumisiriza okuhutaara omu nkora z‘okwombeka. Okunywanisa kwa pulasitiki okukye (15 - 22g/100g) nikubaasisa okukora ebirungo ebigumire omu bwijwire, obwo vinyl monomer esigaireho ≤3μg/g erikuhikiiriza emitindo y‘obukuumi bw‘eby‘okurya - okukwatagana ahabw‘okukoresa omu kuteeka.

Enkora y'eby'obuhangwa

SG3: Omukugu omu kuhindurahindura
Omu bicweka by’eby’obuhingi, firimu ezirikwegamira ahari SG3 ezirimu 40 - 50 phr plasticizer eziyongyeirweho nizikora UV - ebikingirizo by’ebishaka ebihamire, ebirikugyeragyeranisa okujanjaaza omushana n’amaani g’okuzibira okusheeshasheesha. Aha mirimo y‘obujanjabi, ebiri omu monomer byayo ebikye nibibaasisa okutaho ebipimo by‘ebyoma by‘okukyebera eshagama, obwo omu ngatto, nibireetaho ebigyere ebigumire ebirikuguma biine ekishushani omu kuhinduka kw‘obutagatsi.

SG5: Embaraasi y’okukora omu makorero
Abarikukora ebikwato by’amashanyarazi nibakoresa SG5’s 10 - 20 phr plasticizer range kuhangaho ebikwato by’okuzibira omuriro - ebirikuzibira amashanyarazi, barikugaita okuzibira amashanyarazi n’okugumaho kw’ebyoma. Omu kwombeka, neerugayo omu bipande by’okukinga amadirisa ebitarikubaasa kukwatwa embeera y’obwire, ahu obugumire bwayo oburi ahagati burikuzibira okusheenyagurika kw’omuyaga gwa ozone. Ebicweka by’emotoka ebibumbirwe omu nshaho, nk’okusharaho enyiigi, nibigasirwa omu nkora yaayo - amaani - n’oburemeezi.

SG7: Omuhanguzi w’obugumire
Enkora z‘okutaho emipiira y‘amakorero nizeegamira aha SG7‘s high modulus ahabw‘emipiira y‘okusheenya amaizi etarikukwatwaho emibazi n‘emipiira y‘amaizi erikuteebwaho oburemeezi. Ebishushani by’amadirisa ebishohoziibwe, byajwanzya na titanium dioxide, nibyoreka okugumaho kw’erangi okw’omutaano omu mbeera z’aheeru. Abarikukora eby’amashanyarazi nibakikozesa omu nju z’ebikwato ebikozirwe omu nshaho, barikukoresa okuhama kwayo omu bwire bw’okuteerana omu bwire bw’obutagatsi bwingi.

Endagiiriro y'okutunguura enkora

Entwaza y'okwotsya
SG3 neeshaba okurinda obutagatsi obugumire (160 - 180°C) okuzibira okuvunda juba; nangwa n’okurenga ahari 10°C nikibaasa kureetera hydrochloric acid kuruga omu mubiri, ekirikureetaho okuhinduka kyenju. Okutaana n’ekyo, SG7 neegumisiriza okukora 180 - 200°C, ekirikubaasisa emihendo y’okushohoza ey’ahonaaho ahabw’emipiira mikuru - diamita, n’obu eraabe neerenga 210°C neereetaho akabi k’okusharaho orujegyere rwa molekyu.

Enkora y'okwongyeraho
Okuhamya: SG3 neeyenda 1 - 2 phr y‘ebirikuhamya ebirimu ebiriisa bya calcium - zinc okurwanisa okusheenyagurika kw‘okwotsya omu bwire bw‘okukora aha nkora y‘okuhamya ebiriisa bingi, obwo SG7 erikwetenga 0.5 - 1 phr yonka ahabw‘okukyendeeza aha buremeezi oburikureetwaho ebiriisa by‘obuveera.
Okusiiga amajuta: Emiringo yoona neegasirwa omu 0.2 - 0.5 phr ya polyethylene wax, kwonka SG3 neebaasa kwetenga emibazi y‘ahaiguru kukyendeeza aha kuteerana kw‘omunda omu birungo ebigumire.
Ebirungo ebirikukora: Ebirikurwanisa obukooko omu nkora za SG7 nibiyongyera aha myaka y‘obuheereza bw‘aheeru, obwo ebirikuhindura aha nkora omu SG5 birikwongyera aha kugumisiriza kwa notch ahabw‘okukoresa omu bwire bw‘obufuki - obw‘obwire.

Oburungi bwa Inginiya omukukora Resin

Omu kugaita enkora ya molekyu ehikire n’okugyezesa okurikugyendera aha kukozesa, ekicweka kyaitu kya SG3, SG5, SG7 nikiha abakozi obushoboorozi bw’okurenga aha bugarukiro bwa PVC obw’obuhangwa. Kuruga aha kuhindurahindura okurikwetengwa ahabw‘ebintu ebirikukoresibwa omu by‘obujanjabi kuhika aha buhame bw‘enkora oburikwetengwa omu kwombeka kw‘ahaiguru, ebirungo ebi nibikwatanisa okuteerana kw‘obugumire bwa sayansi n‘okukora kw‘amakorero—okutaho emitindo mirungi y‘okukora - erikutegyekwa eby‘okugarukamu bya polymer.

Ebirikushobororwaho

Orupapura rw'okurinda omutindo