Film Technology: mifananidzo, unhu, kushanda munzvimbo

Nhoroondo iyi yakatanga kunze kunyange pakati pezana remakore rapfuura,. It raishandiswa chiputiriso kwenhumbi zvokudya indasitiri. Firimu mugumisiro vakawanda michina okunatsiridza pakati makemikari anoumba uye kugadzirwa ruzivo zvakapa aine zvakawanda mishonga uye yakakwirira azvipire kushandiswa.

mamiriro

Properties inoitwa nokuda zvekushandisa mapurasitiki firimu, uye chinangwa chayo kuvimba murwiyo:

• High kumanikidzwa polyethylene ane pasi arambe achirema (LDPE).
• Low-kumanikidzwa polyethylene ane gobvu marongerwo (HDPE).
• Linear LDPE aine dzakachinjwa sezvamunoita.
• Misiyano remubatanidzwa: somuenzaniso, LDPE uye HDPE, polypropylene.

rwokugadzira zvinodiwa

The polyethylene haisi chepfu, ndiyo isiri hunokachidza boka zvinobata moto zvinhu pamwe nokupenya zvokusvika 300 ° C, vamwe zvatariswa kuvimba murwiyo:

Polyethylene firimu yakaderera kumanikidzwa:

• Mechanically rakasimba zvinhu (0,94 ÷ 0,96 g / masendimita ^2).
• Kugadzikana yakakwirira tembiricha (aibuda muoti pa 112 C °).
• Persistent chivako kuti dzinodyiwa kwemafuta uye mafuta. Kwazvakarerekera kune acidic uye alkaline zvinhu.
• Kushaikwa - yakakwirira permeability pamwero, anenge 6 nguva kupfuura HP firimu. Haushandi kuonana Mahydrocarbon uye pamamiriro - pamwe nyore oxidizable zvinhu.
• Film Technology kwakavakirwa HDPE rinokosha kuti kavha zvigadzirwa achirapwa mbereko, uye kunyanya zvakasiyana siyana zvokudya.

The polyethylene firimu mukuru kumanikidzwa:

• It ane arambe achirema pamusoro 0,91 ÷ 093 g / masendimita ^2.
• Zvine tensile simba.
• A pasi kuyerera mwero kunoita kuti weld zvinhu zvidimbu.
• Frost nemishonga: kusvika - 60C °.
• On pemvura pendi iri nyore kushandisa.

Linear LDPE: urongwa nokuda kwezvisikwa tatamuka multilayer mafirimu.

Mumwe mhando zvinhu anogadzirwa vanofanira kusangana zvaidiwa wehurumende pamutemo zvinyorwa:

• Plastic firimu hwokugadzira - GOST 10354 - 82.
• Polyethylene vanodzokera - GOST 25951 - 83.
• HDPE GOST 16338 - 85.
• LDPE GOST 16337 - 77.

kugadzirwa

Technical firimu iri zvinoberekwa extrusion mitoo mumatanho akawanda:

• Kubvunda uye rokuridza Semi-mvura sezvamunoita, kuti zvitange goho kuburikidza marudzi akasiyana hwezvo:

1. Ring, achipa mhando wehomwe kavha. Panguva nzira yokubudisa yacho kamwene zvinhu wakazara uye waoma pamusoro rose urefu, pamwe haizopereri tightening iri ngoma uye renguva ronda Coils. Time-unoparadza chichiitwa, izvo anobvumira kuti vawane kanivhasi kusvika 2400 mm pakureba.
2. Flat, achibvumira zvakananga firimu papepa. Mushure extrusion, mashoko yapera, rwakatambanudzwa uye akacheka. Izvi dzichimhanya ano, asi polyethylene machira haapfuuri 1.5 m.

• Polyethylene kunosvika nadzurudzo kubudisa zvinhu pamwe aida ehupfumi:

1. Chemical, pamwechete kuwedzera maduramazwi zvinhu.
2. Mechanical nokuda Munotatamura.
3. "Crosslinking" by Ion nemwaranzi
4. Thermal Kudzikamiswa. Mushure Kupisa kurapwa, chinokosha mamiriro hunowedzera husingakwanisi zvokuimba kukuvara.

Technical firimu: unhu uye mhando apera zvigadzirwa

Zvichienderana feedstock nemabhindauko okunatsiridza kuona zvinotevera hwokugadzira polyethylene:

• Svetostabilizirovany: ane mukuru kuramba zuva nemwaranzi, oupenyu kunoenderana wevasungwa pamusoro stabilizers. Rine inopenya mavara: yero, girini uye zvichingodaro.
• Shure: kana nenharo anoshandura saizi yayo, obtyagivaya chinhu iri mukati. dandemutande makubhiti 150 mm kusvika 2500 mm dzisimbe.

shrinkage:

1. Longitudinal: 40 kusvika 80%.
2. Transverse: 10 ÷ 50%.

• rinoumba The vanodzokera: akasiyana unhani mutsa kuwedzera reagents kuti yokugadziridza zvinhu ehupfumi pasi yaidiwa unhu.
• Yanyatsosimba: Film Technology pamwe pajira riya kuti polypropylene kana polyethylene.
• Transparent: kunobva zvinhu - HDPE. Hydrophilic ethylene copolymer firimu kwakavandudza pachena.
• Color: Material - HDPE, colorants, stabilizers.

Polyethylene firimu Technical: Applications

Kusiyana kwemarudzi rinobvumira kushandiswa polyethylene mune zvinenge mabhora ose mabasa evanhu:

• Kuvaka: ari muchimiro ruoko kana Matandira, ukobvu 60 ÷ 200 microns. Kushandiswa kavha pallets uye kufukidza zvinhu uye kudzivirira hukawanika pakusvibiswa.

• Agriculture:

1. Film Technology dema ruvara: siyana siyana mapepa, kusanganisira kufukidza "pasi chiutsi" Matavi (60 microns ukobvu), mulching, arambe achirema 10 ÷ 60 microns.
2. Hydrophilic pamwe kunowedzera pachena nokuti greenhouses.

• chiputiriso:

1. Shure firimu (ruoko kanivhasi) pamusoro nesekondari, isingadhuri mbishi zvinhu.
2. Muchimiro masaga nokuti kavha matongo uye dongo.

Polyethylene firimu rine guru chikuva unyanzvi, anogona kugutsa chero kuchiva mutengi. The chikuru drawback - iri refu Nguva manyowa kwemashoko uye yakaderera nenhanho kugadzira.