High{0}}density polyethylene (HDPE) laika hpe, tsi mawan, gawgap ai lam, jak rung ni hpe galaw shapraw ai bungli ni hta, grai kaja ai tsi mawan ni hpe ngang grin hkra galaw ai, n-gun n rawng ai hpe ninghkap lu ai atsam, n-gun n law ai atsam ni a majaw, grai lang ai. Raitim, n bung ai application masa ni gaw HDPE sheet a matu ra kadawn ai arung arai ni a bungli galaw ai lam hta ahkyak ai shai hkat ai lam ni hpe shabyin ya ai majaw, bungli masing a hkam kaja lam hte asak galu na matu htap htuk ai arung arai ni hpe lata la ai lam hpe ahkyak shatai ya nga ai. Ndai laika buk gaw HDPE sheet arung arai lata ai ladat ni hpe ningmu masum kaw na hkrang shapraw ai hku sawk sagawn ai: madung arung arai ni a atsam marai ni, ahkyak ai bungli galaw ai lam ni, hte shinggyim masha ni a matu jai lang ai lam ni hpe hkrang shapraw ai.
HDPE Materials ni a npawt nhpang hte garan ginhka ai lam ni
HDPE gaw grai n-gun ja ai polyethylene resin rai nna, n-gun ja ai molecular chain ni hte 0.941 kaw nna 0.965 g/cm3 du hkra n-gun rawng ai. Hpaga lam hta shai hkat ai lam ni hpe madung tawn nna, gat lawk hta nga ai HDPE sheet arung arai ni hpe extruded hte compression-molded amyu hku garan ginhka mai ai. Shawng na gaw, grau kaja ai n-gun (hkam sharang ai ±0.5mm) hpe jaw ya nna, lining hkrak ai arung arai ni a matu mung htuk manu ai. Hpang jahtum na gaw grau nna hkra machyi ai lam hpe jaw ya ai (notched impact n-gun 20 kJ/m2 hta grau kaba ai (sh) maren sha re) rai nna, n-gun ja ai lit ni hpe hkan sa ai application ni a matu htuk manu ai.
Madung bungli galaw ai lam hte seng nna, tsaw ai{0}} manu dan ai HDPE sheet gaw lawu na madung masat kumla ni hpe hkan sa ra ai:
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2. grup yin hte seng ai myit ru myit tsang lam hpe ninghkap ai lam: Hkying hkum 24 tup 50℃hta hka kata de lup mat ai hpang n-gun n rawng ai lam n nga ai.
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Madung bungli galaw ai lam a matu lata la ai lam
(1) Ladat hte seng ai npawt tara ni
Lit kaba ni (sh) ayan na shingjawng ai lam ni (mining jak liner zawn re ai) ni a matu, arung arai ni hpe ninghkap ai lam gaw ahkyak ai lam langai rai nga ai. 2%{3}5% ultra-high molecular weight polyethylene (UHWPE) hpe kayau kaya bang ai hku nna, sheet n-gun hpe 0.08-0.12 cm3/1.61 km (ASTM D1044 chyam dinglik ai madang) de shayawm lu ai. Structural support applications ni a matu (100 MPa hta grau ai (sh) maren sha re ai n-gun ja ai n-gun rawng ai n-gun ja ai n-gun ja ai ni a matu, 800 MPa hte elastic modulus Greater hta grau kaba ai (sh) elastic modulus kaba ai hpe lata la ra ai.
(2) grup yin hte seng ai lam hpe madi shadaw ai lam ni
Hkring ai aten hta- aten ladaw hta, UV aging gaw primary failure mode rai nga ai. 2%-3% carbon nsam rawng ai hte galai shai ai HDPE sheets ni gaw nbung laru hpe 3-5 lang jat ya lu ai (QUV acceleated acceleated aging tests ni gaw ΔE a nsam shai hkat ai lam hpe madun dan ai.<3 after 500 hours). For applications involving contact with food or pharmaceutical media, sanitary-grade resins that comply with FDA 21 CFR 177.1520 must be selected to ensure heavy metal migration is less than 0.1 ppm.
(3) Htap htuk ai lam galaw ai
thermal welding hpe lang nna sheets ni hpe hpaw dat ai shaloi, 0.1-}0 g/10 min 0.1-0.3 g/10 min ngu ai melt flow rate (MFR) hte npu de n-gun n-gun n-gun n-gun hpe lata la na matu hpaji jaw da ai. Ndai lam gaw weld joint n-gun hpe madi shadaw ya ai (Shear n-gun atsam hta 85% hta grau ai (sh) maren sha re) n-gun grai ja ai majaw byin pru wa ai n-gun n-gun hpe koi gam lu ai. CNC cutting a matu, MFR > 0.5 g/10 min hte free-cuttting grade hpe grai shayawm lu na matu hpaji jaw ai.
Typical jai lang ai lam a matu arung arai hparan ladat ni
(1) Chemical Corrosion makawp maga ai lam
Hydrochloric acid hte sodium hydroxide zawn re ai n-gun n rawng ai media ni hte hkrum katut ai tank lining application ni a matu, 15% glass fiber hpe n-gun shaja ya ai HDPE composite arung arai ni hpe galaw na matu hpaji jaw da ai. Shi a Young a modulus gaw 1200 MPa de du lu ai sha n-ga, grai kaja ai tsi mawan ni hpe ninghkap lu ai atsam hpe matut manoi tawn da lu ai (50% NaOH hka hta shaning mi tup hka kata de lup mat ai hpang n hkrat sum ai).
(2) jak hte makawp maga ai ladat ni
Machine tool hpe lam madun ai rail sin ai ni a matu, 0.8 μm hta grau nna Ra Less a ntsa n-gun n-gun rawng ai hte Shore D 60-70 hte n-gun n-gun n-gun n-gun n-rawng ai. Ndai lam gaw metal chip hkra machyi ai lam ni hpe hkrak hkra pat shingdang ya nna, lam madun ai wanleng ntsa hta grai n-gun ja ai hpe pat shingdang ya ai.
(3) grup yin makawp maga ai lam ni
0.7 g/cm3 hte n-gun n law ai HDPE sheet gaw, 40% daram n-gun hpe shayawm ya lu ai sha n-ga, n-gun n-gun hpe n-gun n-gun hpe shayawm ya lu ai.
HDPE sheeting a matu arung arai lata ai lam gaw, madung hku nna, arung arai galaw ai lam hpe jai lang ra ai lam ni hte hkrak hkrak bung hkra galaw ai lam re. Engineering galaw ai hta, jak rung n-gun, grup yin hpe ninghkap ai lam, sut masa lam ni hpe galaw ai zawn re ai lam law law hpe tup hkrak myit yu ra ai, lata la ai hparan ladat a kam hpa mai ai lam hpe prototype chyam dinglik ai lam hku nna jep joi ra na re. Bletting hte gram lajang ai lam ni hta rawt jat wa ai hte maren, HDPE sheet hparan ladat ni gaw shi a application hpe grau ra sharawng ai application ni hta shadut nga ai. Ndai lam gaw, arung arai engineer ni gaw, dai arung arai a microstructure hte macroscopic atsam ni hpe matut mahkai ya ai ladat ni hpe matut nna chye na na matu ra nga ai.
