Stretch film yɛ polymer ade a wɔde di dwuma kɛse wɔ logistics packaging mu. Ne synthesis nhyehyɛe no nya adwumayɛ ne gua so akansi a ɛwɔ ade no mu no so nkɛntɛnso tẽẽ. Esiane sɛ nneɛma a atwa yɛn ho ahyia ho banbɔ ho ahwehwɛde ahorow no atu mpɔn ne nneɛma a wɔde kyekyere nneɛma ho ahiade ahorow nti, mfiridwuma a wɔde yɛ nneɛma a wɔde yɛ sini a wɔtrɛw mu no nso yɛ foforo bere nyinaa. Saa asɛm yi bɛhwehwɛ core synthesis kwan a wɔfa so yɛ stretch film fi raw material selection, polymerization nhyehyɛe so kosi film forming technology so yiye.
Raw material a wɔpaw: Fapem na ɛkyerɛ adwumayɛ .
Nneɛma titiriw a wɔde yɛ stretch film ne polyethylene (PE). Ɛgyina atirimpɔw no so no, wobetumi apaw nea ɛba fam-Density polyethylene (LDPE), linear low-Density polyethylene (lldpe) anaa nea ɛkorɔn-Density polyethylene (HDPE). LDPE ma film no yɛ flexibility pa ne transparency, bere a LLDPE tumi kɛse ma tensile ahoɔden ne puncture resistance. Wɔ nnansa yi mfe mu no, Metallocene polyethylene (MPE) a ɛnyɛ nea atwa yɛn ho ahyia ho asɛm no abɛyɛ nea wɔpɛ nkakrankakra a wɔde yɛ nneɛma a wɔde yɛ ade a ɛkorɔn-End stretch film esiane ne molecule nhyehyɛe a ɛyɛ pɛ kɛse ne adwumayɛ a ɛyɛ adwuma yiye nti. Bio nso, sɛnea ɛbɛyɛ a wobedi ahiade pɔtee bi ho dwuma no, nneɛma bi de nneɛma a wɔde ka ho te sɛ tackifiers, UV inhibitors anaa antioxidants bɛka ho.
Polymerization nhyehyɛe: efi monomer so kosi polymer so .
Wɔnam ethylene a ɛyɛ polymerization adeyɛ so na ɛyɛ polyethylene a wɔyɛ no titiriw. Nneɛma a wɔtaa yɛ no bi ne-nhyɛso polymerization ne-nhyɛso polymerization. High-pressure polymerization (te sɛ tubular kwan anaa kettle kwan) fata ma LDPE a wɔyɛ. Nneyɛe tebea no yɛ katee na free radical polymerization ho hia wɔ ɔhyew a ɛkorɔn ne nhyɛso a ɛkorɔn ase. Low-Pressure polymerization (te sɛ gas phase kwan anaa ano aduru kwan) na wɔde yɛ LLDPE ne HDPE. Ziegler-Natta Catalyst anaa Metallocene Catalyst na wɔtaa de di dwuma. Nneɛma a ɛma ɛyɛ adwuma no yɛ mmerɛw na molecule mu duru kyekyɛ no yɛ nea wotumi di so. Nnɛyi akwan horow taa de gas-Phase fluidized bed mfiridwuma di dwuma de ma nneɛma a wɔyɛ no tu mpɔn na ɛtew ahoɔden a wɔde di dwuma so.
Sini a Wɔyɛ Mfiridwuma: Agoru a ɛda Blow Molding ne Cast Film ntam .
Nneɛma a wɔde kyekyere nneɛma ho a wɔyɛ no gyina nneɛma abien a wɔyɛ so titiriw: Blow Molding ne Cast Film. Ɔkwan a wɔfa so bɔ no no ma resin a ayow no kɔ tubular film mu fa annular die head so, na afei ɛyɛ nwini, twetwe na ɛma ɛyɛ hyew. Saa kwan yi sua-ɛka na ɛfata ma kɛse-scale production, nanso film thickness no pɛpɛɛpɛyɛ no ba fam kakra. Ɔkwan a wɔfa so yɛ sini no de die ti a ɛyɛ tratraa di dwuma de yi sini no fi mu tẽẽ, na wɔde cooling roller na ɛyɛ no ntɛmntɛm. Ade a wɔawie no yɛ nea ɛyɛ pɛ na ɛyɛ nea ɛda adi kɛse, nanso nnwinnade a wɔde hyɛ mu no yɛ kɛse. Wɔ nnansa yi mfeɛ mu no, Multi-Layer CO-extrusion technology abɛyɛ adeɛ titire. Ɛdenam resin layers a ɛsono ne su a wɔde hyɛ so no so no, wobetumi anya ahoɔden a ɛkorɔn, nea ɛda adi kɛse ne nsu a ɛyɛ den pa bere koro mu.
Nneɛma a atwa yɛn ho ahyia ho banbɔ su: sɛe a ɛsɛe ade na wotumi de yɛ nneɛma foforo .
Bere a wiase nyinaa nneɛma a atwa yɛn ho ahyia ho mmara ayɛ den no, Synthesis Technology of Stretch Film no rekɔ so akɔ fam a ɛyɛ mmerɛw sɛ ɛbɛsɛe na ɛnyɛ den sɛ wɔbɛsan de adi dwuma bio. Bio-gyina polyethylene (te sɛ PE a wɔde asikre ethanol ayɛ) ne nneɛma a wɔde ka ho a ɛtumi sɛe no a wɔde di dwuma no de nkakrankakra rehyɛ atetesɛm mu petrochemical raw materials ananmu. Bere koro no ara mu no, volatile organic compound (VOCs) a wɔtew so denam nneɛma a wɔyɛ no a wɔma ɛyɛ papa so no nso abɛyɛ ade titiriw a nnwuma no de wɔn adwene si so.
Synthesis technology a ɛwɔ stretch film mu no ka nkɔso a ɛwɔ fields pii a ɛfa polymer chemistry, nneɛma ho mfiridwuma ne nneɛma a atwa yɛn ho ahyia ho nyansahu ho no bom. Daakye, ɛnam sɛ nneɛma foforɔ a ɛma nneɛma yɛ adwuma ne akwan a ɛyɛ ahabammono a ɛkɔ so yɛ adwuma no renya nkɔsoɔ nti, wɔbɛma stretch film no adwumayɛ ne nea ɛbɛkɔ so atra hɔ daa no atu mpɔn bio, na ɛbɛma wiase nyinaa nneɛma a wɔde kyekyere nneɛma ho adwuma no anya ano aduru a ɛyɛ adwuma yie.