Lub Tes Tsho Polyethylene: Tus Yam Ntxwv Ntawm LDPE Ib Lub Tes Tsho Rau Ntim, Khoom Noj Thiab Cov Yeeb Yaj Kiab Dub. Qhov Twg Yog 12cm, 200mm Thiab Lwm Qhov Ntau Thiab Tsawg Siv?

2024 Tus sau: Beatrice Philips | [email protected]. Kawg hloov kho: 2024-01-09 13:24

Txhua tus neeg yuav tsum paub tias lub tes tsho polyethylene yog dab tsi, thiab yam ntxwv zoo li cas ntawm LDPE ib nrab lub tes tsho rau ntim khoom. Kev paub txog tus yam ntxwv ntawm qib zaub mov thiab cov txuj ci yeeb yaj kiab dub kuj tseem ua lub luag haujlwm tseem ceeb. Ib lub ntsiab lus cais yog qhov khoom siv zaj duab xis nrog qhov dav 12 cm, 500 mm thiab lwm qhov ntau thiab tsawg.

Peculiarities

Lub tes tsho polyethylene, tseem hu ua zaj duab xis lub tes tsho, yog cov qauv polymeric ntev kaw rau ob sab. Nws tau siv tsis yog tsuas yog hauv nws daim ntawv dawb huv, tab sis kuj yog qhov khoob rau kev tsim cov pob tshwj xeeb. Feem ntau, lub tes tsho yog qhov ntau thiab tsawg . Qhov no yog vim kev siv ua tib zoo kho cov kab tsim khoom. Cov ntsuas tsis raug hloov kho raws li lub hom phiaj siv tau ntawm cov khoom tshwj xeeb.

Cov yam ntxwv tseem ceeb ntawm cov khoom tiav tau sau tseg hauv GOST 10354-82 . Raws li tus txheej txheem, zaj duab xis yas yuav tsum tau extruded. Qhov dav ntawm cov khoom tsim tawm yog qhov qub nyob ntawm hom khoom. Cov khoom noj khoom haus kuj yuav tsum ua raws li cov cai ntawm kev ua kom huv.

Kev siv rau cov khoom noj xav tau ntawm cov yeeb yaj kiab tsis tau hais tseg hauv GOST 16337 yuav tsum tau koom tes nrog cov saib xyuas kev noj qab haus huv.

Nyob rau hauv txhua rooj plaub, cov thev naus laus zis ib txwm cuam tshuam nrog kev siv hauv kev tsim cov granules nrog muab cov lej ntsuas. Feem ntau, cov khoom tshwj xeeb tau siv, tshwj xeeb yog yas thiab hloov tus neeg sawv cev. Xws li cov tshuaj ntxiv tuaj yeem lav tau lub zog tensile. Kev hloov pauv ntxiv yog ua los ntawm kev xaj tshwj xeeb. Kev tso tawm ntawm ib lub tes tsho txhais tau tias lub tes tsho ntev tsis yog tus qauv.

Cov yam ntxwv tseem ceeb ntawm cov khoom siv yog:

• tiv taus cov tshuaj feem ntau pom hauv lub neej txhua hnub;
• nce elasticity;
• yuav luag xoom permeability rau dej thiab chav;
• huab cua nruj;
• pob tshab ntawm ntau tus qauv;
• theej siab dielectric tsis;
• lub sijhawm ua haujlwm ntev;
• fusibility;
• raug rau ultraviolet teeb;
• tsis txaus ntseeg ntawm qhov kub thiab txias.

Ntau yam

Lub tes tsho polyethylene ntim tau muab faib ua ob hom tseem ceeb - LDPE thiab HDPE, uas yog, ua los ntawm cov khoom siv siab thiab qis, feem. Kev kho siab siab tso cai ua kom yoog raws, tsis muaj qhov hnyav thiab ua kom yoog raws . Qhov saum npoo ntawm cov khoom yuav ci. Cov tshuaj lom ntawm LDPE yog xoom, uas ua rau cov khoom muaj txiaj ntsig zoo rau kev lag luam khoom noj. Tab sis HDPE feem ntau yog siv rau kev xav tau kev paub.

Nws yog cov khoom lag luam ruaj khov thiab ncaj ncees. Nws cuam tshuam me ntsis los ntawm cov kua qaub thiab alkalis.

Hais txog cov khoom siv hluav taws xob rwb thaiv tsev, HDPE tseem sawv tawm rau qhov nyiam. Ib qho ntxiv, nws tsim nyog taw qhia tias zaj duab xis tuaj yeem suav nrog ib lossis ntau txheej. Cov tshuaj ntxiv muaj xws li:

• canvas ntawm hom ib txwm (tsis muaj cov tshuaj ntxiv);
• cov khoom ruaj khov (feem ntau yog xim dub, tab sis qhov no tsis tsim nyog);
• kev tsim kho hydrophilic;
• ib yam khoom nrog kev qhia txog cov neeg ua haujlwm tiv thaiv antistatic (xws li cov ntaub thaiv npog khov tsawg dua li ib txwm).

Lub tes tsho tuaj yeem yog xim dub, dub thiab dawb thiab xim. Gradation ntxiv suav nrog cov khoom hauv qab no:

• tes tsho ua npuas ncauj;
• txhawb ntxiv;
• tshav kub shrinkable;
• ncab hom;
• lub tes tsho nws tus kheej;
• ib nrab-lub tes tsho (nrog txiav ib sab).

Qhov ntev (kho kom raug)

Feem ntau, cov tuab ntawm zaj duab xis polyethylene yog 20-200 microns. Feem ntau, lub tes tsho muaj qhov dav ntawm 1.5 m nrog tig ntawm 3 m hauv qhov cua ntawm 100 tus ntsuas. m. Tsis tas li, qhov dav tuaj yeem yog 10 cm, 12 cm. Kuj tseem muaj tes tsho polyethylene:

• dav 200 hli;
• 50 hli dav;
• dav 150 hli;
• 2 m luas.

Scope ntawm daim ntawv thov

Tau kawg, feem ntau, tubular polyethylene zaj duab xis yog siv rau ntim cov khoom lag luam khoom noj. Cov cua sov uas tiv taus kuj tuaj yeem siv rau ci, kib. Txawm tias cov khoom siv hauv tsev thiab rooj tog tau ntim rau hauv lub tes tsho. Cov khoom loj tau ntim los ntawm txhais tes. Cov khoom me me feem ntau muab tso rau hauv lub tes tsho uas siv cov kws tshaj lij.

Cov khoom lag luam zoo sib xws tseem tab tom siv:

• raws li cov ntaub npog rau tsev cog khoom thiab chaw cog qoob loo;
• hauv kev ntim cov ntaub ntawv ntau;
• raws li ib qho insulator ntawm cov khoom siv hluav taws xob los ntawm kev ua kom humidification;
• rau germinating seedlings (raws li kev hloov pauv rau khob yas).