Plastic sheet hpe ahkyak ai hpaga lam hte jai lang ai arung arai langai hku nna, gawgap ai lam, shinggyin la ai lam, ndau shana ai lam, tsi hpaji hparat hte kaga lam ni hta grai lang ma ai. Shi a amyu myu galaw ai lam hte jai lang ai lam ni hpe madung hku nna shi a hpawng de ai lam hte raw material lata ai lam hku nna dawdan ai. Ndai laika buk hta plastic sheet a madung npawt tara ni hpe sawk sagawn nna, dai a galaw shapraw ai lam, madung raw arung arai ni, hte ahkyak ai hpaji masa lam ni hpe hkrak tup tsun dan na re, dai hte seng ai hpaga lam ni a matu madung tawn ai lam ni hpe jaw na matu yaw shada ai.
I. Plastic hka htung a npawt tara ni
Plastic sheet hpe madung hku nna, hkum hkrang (sh) tsi ladat ni hku nna galaw ai, tsaw ai -molecular polymers (plastic resins) kaw na galaw ai. Shi a madung daw ni hta base resin, additives, hte karum ai arung arai ni lawm ai. Base resin gaw sheet a madung jak rung atsam, katsi ai hpe ninghkap lu ai atsam, chemical stability hpe dawdan ya ai. Common base resins ni hta, polyethylene (PE), polyvinyl chloride (PVC), polycarbonate (PC), hte acrylonitrile-ya ai-styrene copolymer (ABS) ni lawm ai.
Additives ni hpe lang nna, n-gup magap ni hpe grau kaja hkra galaw na matu lang ai, ga shadawn:
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2. Stabilizers: thermal degradation (sh) photooxidation hpe pat shingdang na, lead sau hte organotin n-gun ni;
3. Fillers: Calcium carbonate hte talc zawn re ai ni gaw, manu jahpu hpe shayawm ya nna, ngang kang ai lam hpe grau kaja hkra galaw ai;
4. Wan hkru ai lam hpe shayawm kau na: Wan hkru ai lam hpe jat wa na, gawgap ai lam hte electronic bungli ni hta jai lang na matu htuk manu ai;
5. Colorants: Aesthetics (sh) logo ni a matu sheet ni hpe masat da ai.
II. Plastic hka htung ni a madung hkrang sumla ni
Plastic sheet hkrang shapraw ai lam ni gaw n bung ai, ladat amyu myu gaw structural uniformity, n-gun n-gun, galaw shapraw ai atsam hpe hkrak hkra hkra machyi shangun ai. Lahta na lam ni gaw, grau nna lang ai ladat nkau mi rai nga ai:
1. Extrusion
Extrusion gaw plastic sheets ni hpe galaw shapraw na matu lang ai ladat langai mi re. Dai lam hta, resin pellets ni hpe additives ni hte kayau nna, extruder langai mi hta katsi shangun nna, T-die hpe sheets hku nna shapraw nna, dai hpang, hkrang shapraw, katsi ai, hpang jahtum shanhte hpe ra sharawng ai specifications ni de gang je kau na matu, three{2}roll calender hku nna lai wa ai. Ndai ladat gaw PE, PP, PVC zawn re ai thermoplastics ni a matu htuk manu ai. Dai gaw matut manoi galaw shapraw ai hte manu n law ai a akyu ni hpe jaw ya ai, raitim, n-gun ja ai uniformity hpe mold design hku nna grai hkra machyi shangun ai.
2. Calendering
Calendering ladat gaw, n-gun n rawng ai shingnip ni de, n-gun n rawng ai shara ni hpe dip nna, n-gun law law hpe lang nna, n-gun n rawng ai shingnip ni de bang da ai. Ndai ladat gaw PVC hte ABS zawn re ai arung arai ni a matu htuk manu ai, tsaw ai{1}}}gloss hpe shapraw ai, npu n-gun n-gun n-gun n-gun n-gun n-gun n-gun n-gun n-gun n-gun n-gun n-gun n-gun n-gun n-gun n-gun n-gun n-gun n-gun n-gun ni hpe galaw ai. Shi a akyu gaw, ntsa lam n-gun kaba ai hta nga ai, raitim, ahkyak ai arung arai ni hpe jai lang ra ai hte raw material flowability hta grai ra kadawn ai lam ni nga ai.
3. Hot Pressing
Hot pressing gaw thersosetting plastic ni (phenolic resins zawn re ai) shing nrai kaba ai, n-gun ja ai shingnip ni a matu htuk manu ai. Prepreg (sh) powdered raw materials ni hpe n-gup magap langai hta tawn da nna, n-gun kaba ai hte n-gun kaba ai npu hta mai tsai wa ai. Ndai ladat gaw grai n-gun ja ai hte n-gun ja ai hkrang ni lawm ai sheet ni hpe shapraw lu ai, raitim, galaw shapraw ai atsam yawm ai hte n-gun grau jai lang ai lam hpe jaw ya lu ai.
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Sheet ni a bungli yawng hpe grau kaja hkra galaw na matu, dai ni na aten na ladat ni gaw, coextrusion (sh) lamination hpe jai lang chye ai. Ga shadawn, wear{1}} hpe ninghkap lu ai layer hte barrier layer hpe substrate layer hte laminate galaw nna, tsaw ai{2}}}performance sheets ni hpe galaw mai ai. Coextrusion gaw extruder law law hpe lang nna, langai sha re ai arung arai ni hpe shadu sha ai, multi{4}}layer structure ni hpe langai sha hta galaw ai. Dai hpe tsaw ai{6}}end gawgap ai lam hte mawdaw lang ai lam ni hta grai lang ai.
III. Madung hpaji masa ni hte Quality hpe hkang ai lam
Plastic sheet arung arai ni a npawt nhpang hte n-gun atsam hpe lam law law a majaw byin pru wa ai, dai hta raw material ratio, process parameters, hte arung arai ni a hkrak ai lam ni lawm ai. Madung hkang zing ai lam ni gaw:
• Nbung laru hpe hkang lu ai: Grai law ai hka lim ai shara ni gaw n-gun yawm mat chye ai, grai n-gun n law ai hka n-gun ni gaw hka lim ai lam hpe hkra machyi shangun chye ai;
•Mungkan tara: Bubbles hte n bung ai n-gun ni hpe koi nna, langai sha re ai arung arai ni hpe garan gachyan ai lam hpe sadi ra ai;
•Coling rate: Sheet a crystallinity hte dimensional stability hpe hkra machyi shangun ai;
•UV coating hte surface printing zawn re ai ni hpe post{ 0}} hpe galaw ai ladat ni gaw, bungli galaw ai lam hpe grau nna jat wa shangun lu ai.
IV. Daw dan lam
Plastic sheet arung arai ni a matu composition ladat hpe lang ra ai. Madung extrusion hte calendering kaw nna, rawt jat galu kaba wa ai coextrusion hte compounding hpaji ni du hkra, galaw sa wa ai lam shagu hta laklai ai akyu ni hte jai lang ai lam a shingdu labau ni nga ai. Htawm hpang de, grup yin hpe makawp maga ai arung arai ni hpe (bio-based plastic zawn re ai) hte hpaji rawng ai galaw shapraw ai hpaji masa ni hpe hpaw hpang wa ai hte, plastic sheet arung arai ni a hpawng de ai ladat ni hpe grau kaja hkra galaw ya na re, shanhte a galu kaba lam hpe grau nna jai lang na matu n-gun jaw ya na re.
