Cov kev faib tawm ntawm plastics
Cov khoom pov thawj ntawm cov khoom yas yog ABS, AAS, ACS, ASA, BMC, PA66, PP, EVA, LDPE, LLDPE, lwm cov yeeb nkim nyias zaj duab xis, yeeb nkab, phaj, thawv, lub hnab ntim, cov yas yas, tawv tawv, khoom tawv tawv, khoom siv tawv yas, ribbon, yas ntawv sau, yeeb nkab thiab lwm yam yas machinery moulding tshuab, crushing khoom, tsev ntaub tshuab, cuab yeej siv lub tshuab, vuam siv lub tshuab , tshuab luam ntawv thiab accessories, txhaj tshuaj molding tshuab, extruder, sib txawv yeeb nkab tshuab, yeeb tshuab, ntawv tshuab, phaj tshuab, tshuab tshuab, granulating tshuab, tshuab moulding tshuab, yas machinery, ntim khoom, luam ntawv khoom, machine, tshuab xeem, xovxwm thiab lwm yam khoom uas muaj hlau txuas hluav taws xob polycarbonate (PC) thiab ABS hlau, thermoplastic elastomer, polycarbonate copolymers, poly (ether imide, polyphenylene oxide (PPO), polyformaldehyde (P OM), thiab lwm yam yas pigments, masterbatch, cov neeg ua hauj lwm dawb, hluav taws kub, lub roj nplaum, cov nplaum, cov tshuaj tiv thaiv, , cov neeg ua haujlwm tsis muaj zog, cov tshuaj tsis muaj pwm, cov pwm tuaj yeem, cov khoom pwm, cov neeg muag khoom, cov khoom lag luam, cov kabmob antibacterial, tus neeg saib xyuas, kev hloov pauv, thiab lwm yam yas pwm hauv tsev, pwm, pwm, packing aviation pwm, mechanical and electrical pwm, tsiaj txhu, caprolactam, nylon yarn, acrylic, polyester chip kev cais tawm thiab cov qauv ntawm cov khoom pwm ntawm cov khoom pwm, pwm, tshuab pwm, pwm, tshuab pwm, pwm maus taus,
(1) ua los ntawm cov yas yas yog tsim los ntawm tej yam khoom siv rau hauv paus thiab lub tshuab ua kua (molecules ).Qhov cov khoom siv yas yog tsim los ntawm kev siv tshuaj thiab cov yeeb tshuaj. Cov khoom no, xws li cov ntoo, roj, thee thiab cua, organic sib txuas.
(2) kev faib tawm ntawm thermoplastic plasticity - thaum muag thiab ua kom tawv nqaij thaum txias - softening thaum reheated - yog pib softened thaum heated.Hauv hauv pwm hauv cua sov, cov yas molecules tuaj yeem ua ke thiab sib zog, thaum tawv tawv tom qab sib sau, yog tias ntxiv dua siav, 't soften,
(3) yas kev tsim (1) crystalline plastics - PE. PP. Nylon, PBT, POM, PPS, LCP, sPS. Tus tsiaj. (B) thaum muaj teebmeem nyob rau hauv kev ua haujlwm, cov molecules muaj zog thiab qhov nruj muaj zog tuaj. (C) yaj dua loj dua qhov hloov pauv, thaum nyiaj nce nqi txog 30% , (h): qhov tsawg dua ntom nti tom qab lub tsho, ua kom yooj yim dua tom qab kho, (E) molecular chain txoj kev khwv kom nruj heev, yog li kev nyuaj siab tsis yoojyim tso (F) (H) thaum lub sij hawm qhuav ntawm cov pwm khaub thuas, qhov qis qhov me me ntawm lub sijhawm ntawd, tab sis nws yog vim muaj qhov tsis tshua muaj pob zeb, uas ua rau lub zog qis dua yav tom ntej. I) thaum lub sij hawm thermal pwm ntau lawm, tus nqi qis qis qis dua, vim tias qhov kev hloov crystallization siab siab thiab qis qis qis me me (J) qeeb qeeb ntawm cov thermal pwm ntau lawm, qhov ntau dua qhov degree ntawm crystallization , qhov zoo ntawm lub xeev yog lub cev, thiab ntau opaque (K) yog, nrog t (L) tshaj li ntawm ntu: PE 1.03 cm3 / g hauv 20 ℃, ntawm 200 ℃ rau 1.33 cm3 / g, nce tus nqi ntawm 29% (2) ib qho amorphous yas: PS, AS, ABS, PMMA (acrylic), PC, NORYL, PVC, PES (poly) rewelding, CA.Properties: (A) thaum tsis muaj qhov taw qhia (B), cov molecules yog lus, tsis muaj zog hauv lub zog thiab nro. (d) tom qab lub qhov tseem ceeb ntawm cov tawv nqaij hloov me me, tsis muaj qhov contraction tom qab ua kom zoo (E) vim yog qhov qis ntawm crystallization (F (G), cov xim kub ntau dua ntim (H): PS ntawm 20 ℃ mus rau 0.97 cm3 / G ntawm 200 ℃ rau 1.04 cm3 / G nce ntawm tus nqi ntawm 8.3%