
bopet

bopet (biaxial oriented polyethylene terephthalate) ack polyester film haye joe stretched polyethylene terephthalate (paltu janwar) seey bunny haye aur iska upayog isaki uchch tanyata shakti, rasayanik aur ayami sthirata, paardarshita, paravartansheelta, gais aur sugandh baadha gunon aur vidyut insulation key liye kiya jaataa haye. vibhinn prakaar kii companiyaan vibhinn brand naamon key tahat bopet aur anya polyester filmon kaa nirmaan karati hain. britten aur america mein, sabse prasiddh vyaapaar naam miler, melinex, lumiror aur hostafan hain.
itihas.
bopet film koo 1950 key dashak key madhya mein mool roop seey dupont, shaahi rasayanik udyogon (aaee. see. aaee.) aur hoxt dwara vikasit kiya gayaa thaa.
1953 mein buckminster fuller ney ack bhooganitiya gumbad key liye ack twacha key roop mein miler kaa upayog kiya, jise unhone oregan vishvavidyalaya mein chhatron key saath banaaya thaa.
1955 mein eastman kodak ney photographic film key liye samarthan key roop mein miler kaa upayog kiya aur ise "estar bases" kahaa. bahut patali aur kathin film ney lambi doori kii yuu-2 tohi udaanon parr reelon koo ujagar karane kii anumati dee.
1964 mein, nassa ney iko II launch kiya, ack vyaas kaa gubbara joe ack motee miler film seey banaaya gayaa thaa, joe ack saath bandhe motey aluminium foil kii dou paraton key beach sandwich kiya gayaa thaa.
nirmaan aur guna.
nirmaan prakriya pighali hui polyethylene terephthalate (paltu) kii ack film key saath shuru hoti haye jise ack sheet roll parr baahar nikala jaataa haye, joe ise anakar avastha mein bujhaa detaa haye. phir yeh chitra dwara dwi-akshiya roop seey unmukh haye. aisaa karane kaa sabse aam tarika anukramik prakriya haye, jisamen film koo pahale germ rollers kaa upayog karke machine kii disha mein kheencha jaataa haye aur baad mein anuprasth disha mein kheencha jaataa haye, i.ee. ack germ ovan mein yatra kii disha mein orthogonally. film koo donon dishaaon mein ack saath kheenchana bhee sambhav haye, halanki isake liye aavashyak upkaran kuchh adhik vistrit hain. drow anupaat aamtaur parr pratyek disha mein 3 seey 4 key aspas hotaa haye.
ack baar chitra puuraa honey key baad, film koo "heat sett" yaa aamtaur parr oopar key tapman parr ovan mein tanaav key tahat kristalikrit kiya jaataa haye. ooshmaa setting charan film koo apane mool aprasaarit aakar mein vaapas sikudane seey rokta haye aur film tala mein aanvik abhivinyas mein bund curr detaa haye. bahulak shrinkhalaon kaa abhivinyas dwi-akshiya unmukh paltu film kii uchch shakti aur kathorta key liye jimmedaar haye, jisamen lagbhag ack vishisht yuva mapank hotaa haye. aanvik abhivinyas kaa ack aur mahatvapurna parinam yeh haye kii yeh kaee chrystal naabhikon key gathan koo prerit kartaa haye. teji seey badhane vaale kristaliya padosi kristaliya kii seema taka pahunchate hain aur drishya prakaash kii tarang dairdhya seey chhote rahate hain. natijatan, ardh-sphatikiya sanrachana key bavjood, dwi-akshiya unmukh paltu film mein utkrisht spashtata haye.
yadi ise binaa kissy yojak key banaaya jaataa, tou film kii satah itani chikani hoti kii jaba film koo ghaav kiya jaataa haye tou paraten ack dusare seey dridhata seey chipak jaati hain, jaisa kii dher kiye jaane parr saaf kaanch kii plates koo chipkana hotaa haye. sambhalana sambhav banaane key liye, silicon dioxide jaise sookshm nishkriya acarbonic kann, aamtaur parr film kii satah koo khurdara karane key liye paltu janwar mein embed kiye jaate hain.
biaxial oriented paltu film koo vaashpit aluminium, sonaa yaa anya dhaatu kii ack patali film key vaashp nikshepan dwara dhaatukrit kiya jaa sakata haye. iska parinam gasses key liye bahut cumm pargamya haye (khaadya packaging mein mahatvapurna) aur yeh 99 pratishat prakaash koo pratibimbit kartaa haye, jisamen infrared spectrum kaa adhikansh hissa bhee shamil haye. khaadya packaging jaise kuchh anuprayogon key liye, aluminakrit bopet film koo polyethylene kii ack parat key saath tukade tukade kiya jaa sakata haye, joe seal karane kii kshamata pradaan kartaa haye aur puncher pratirodh mein sudhaar kartaa haye. iss tarah key tukade tukade kaa polyethylene paksh sust aur bopet paksh chamakdaar dikhaai detaa haye.
anya coatings, jaise kii conductive indium tinn oxide (aaee. tii. oh.), koo sputter deposition dwara bopet film parr lagaaya jaa sakata haye.
anuprayog.
bopet polyester filmon key liye upayog mein shamil hain, lekin inn taka seemit naheen hainh

