Polypropylene - Ke Kēhaupaʻa ka mahana, ka waiwai a me nā 'ano

Polypropylene i loaa i kekahi mahele heheʻe i ka wahi i e e ike ia oe ina oe makemake e hoʻohana i ka mea no ka hana, i ole-Polar kemikala thermoplastic pīlali i pili ana i ka papa o polyolefins.

no ka mooolelo

Kekahi ike polypropylene like me ka huina hoonui o ka propylene polymerization. Ka lako e mea keʻokeʻo ma ka waihoʻoluʻu a mai ka paa ole. Kēia i hoomakaukauia ma ka polymerization o propylene. Polymerization ua lawe mai ma lalo o ka aoao o ka puʻe o ka 10 me ka lewa, i ka mahana ua mālama 'ia i loko o 80 ° C.

Hakakino 'ole a me ka mahele heheʻe i ka wahi

Polypropylene, o ka mahele heheʻe i ka wahi o ka i e e kapaʻia ma lalo nei, i ke 'ano o ka hakakino' ole ua maheleia i ekolu hoailona ia mea:

• atactic;
• syndiotactic;
• isotactic.

Atactic polypropylene - ka laholio-e like mea i loaʻa i ke kiʻekiʻe loa o ke fluidity. kona mahele heheʻe i ka wahi o 80 ° C, oiai i ka pa apŘ o 850 kg / m³. Keia mea ua kekahi wehewehe aku ma ka solubility kiʻekiʻe i loko o diethyl Etera wale no.

Ua i kekahi i loko o kona 'ano, mai ka luna-i ho'ākāka' ia isotactic polypropylene i loko o ia mea i ke kiʻekiʻe modulus o elasticity, kona nuʻa hiki i 910 g. / M³, akā, i ka mahele heheʻe i ka wahi mea nui kiekie a me ka papa koa, mai 165 a hiki i 170 ° C. Kēia mea mea hoʻopale i Nine Inch.

Physico-mechanical e waiwai a me ka hoakaka

Polypropylene me ka mahele heheʻe i ka wahi i haiia ae maluna,, okoa mai ka polyethylene o lalo, nuʻa, i mea 0,91 g. / Cm³. Kēia waiwai mea, he pono ole no ka lula ea. I ho'ākāka 'ia hou i nā puke a me ka oi paa, ka mea, ua hoike mai ia ia i ke kiʻekiʻe ia'ku i ka abrasion.

I waena o nā mea a pau, polypropylene, wela-hoʻopale, no ka mea, hoʻomaka e hoopalupalu no au i ka wā i mahana kīnā 140 ° C. Ka mahele heheʻe i ka mehana o 175 ° C, hou, ua 'ano i loaʻa i ka mea e hoʻonaʻauao ka popopo ńlua. Ka malamalama hoʻopale polypropylene me ka oxygen. Introduction stabilizer emi ka pā lonoaʻili, a hiki hou.

Polypropylene i loaa i kekahi mahele heheʻe i ka wahi oe paha e hoihoi, ina e manao e hoʻohana i kēia mea, i ka wā i'ō e hele okoa ke kaumaha ma muli ka mahana a me ka haawe palapala noi holo. Ka haahaa o ka uku o ka hohola ana, i ka oi aku o ka waiwai o ka me mechanical waiwai. Tensile wawahi stress loli aʻe mai ka 250 a hiki i 400 kgf / cm², akā, i ka elongation ma kaʻoluʻolu o ka mea mai ka 200 a hiki i 800%.

Ka mahele heheʻe i ka wahi o ka polypropylene pepa, a i hōʻikeʻia aʻela ma luna, mea ole ka mea wale ano i hoihoi ponoi nā mea kūʻai mai. Ka mea, i kekahi manawa, e pili ana hou a me ka flexural modulus. Ma ka keia hihia ka mea e hoano e mai 6700 a hiki i 11900 kgf. I ka wā o ka hua wahi elongation Ua like ia 10-20%. Hopena ikaika me ka notch mea 33-80 kgf knm / cm². Brinell paakiki mea 6-6.5 kg / mm².

poepoe o ka palapala noi

Ka hoʻohanaʻana i polypropylene mea kaiāulu. Ka mea hoʻohana e e Filmʻaneʻi nā'ōpalaʻano likeʻole. Mawaena o nā huahana ia mea e pono ke kālā līkaia no:

• mauʻeke;
• paipu;
• Ka lula ea Ke kiaha;
• 'ōpala;
• lāliʻi o ka iiaie oaoieei lako a pan;
• hale waiwai;
• hō'īpale mea;
• ole-ulana lole.

Ma ka hana o ka polypropylene i loaʻa kona alanui, ma laila ka mea, ua hoʻohana 'ia no ka kamakawiwo ole a me ka walaʻau hoʻokaʻawale palaoa, e like me ka nenoai mea e maluhia iho la ma ka' enehana "lana kahua hahi". I ka polypropylene ua copolymerized me'etolina, ole-crystallizable copolymer hiki ke loaa. Ua hiki ke ho'āʻo laholio ano, i mea e kū'ē'ē mai i ka poe oo hoi, a ua kiʻekiʻe Nine Inch e kū'ē'ē mai.

No ka wela a me ka kamakawiwo ole ua hoʻomano hoʻohana Hoʻonui i ka pono polypropylene. Ka mahele heheʻe i ka wela o ka polypropylene pepa i haiia ae maluna,,, keia nae mea ole ka mea wale ano i oe e e hoihoi mua ke kūʻaiʻana i nā huahana mai kēia mea. Ua E hoi e makaala i ka hoomaka polypropylene i mea i like loa me ka waiwai i ka polyethylene hua. Akā, EPS hiki ke auou caiaiai me ka Nani Loa holoʻokoʻa extrusion o ka hoomaka polypropylene. No ka caulking, alanui ka paleʻana, no? Ieoaeunoaa adhesives, mastics a me Padfolio Film pinepine hoʻohana atactic polypropylene. Laulā o ka polypropylene i loko o Rusia ua like penei:

• 38% - ipu;
• 30% - ka pae;
• 18% - ho film;
• 6% - paipu;
• 5% - polypropylene a lahilahi;
• 3% - Other.

Ka mahele heheʻe i ka wahi o ka polypropylene na ohe

Ka mahele heheʻe i ka wahi o ka polypropylene na ohe - o kekahi o ia mau ano, i mea loa pinepine hoihoi i loko o ka kēia consumer. Ua lako e hoʻomaka e hoopalupalu mai i 140 ° C ana o ka mahele heheʻe i ka - 175 ° C. Na hope koho - ka mea, o ke ana wela o ka superheated mahu. Inā keia helu, ua noonoo, ka polypropylene hiki ke hoʻohana 'ia no kekahi wai lako'ōnaehana ana i ka wai ua kaʻi aku me auʻa wale kiʻekiʻe ana wela.

Akā, na mea i ole ai na mea i loko o keia mea. Ke ductility hana me ka hou hiʻona o ka mea. Polypropylene ma ka wanaao ae mai ka elongation i loli aʻe i loko o ka laulā o ka 200 a hiki i 800%. Kēia Hōʻike ia ina ka ohe e e loli ma ka kekahi kaumaha, alaila, o ka huina hoonui e ke kīkoʻo i loko o ka lōʻihi Tube, a laila terminates.

I Ka Hopena: keʻano o ka polypropylene

Nā waiwai o ka polypropylene, nā 'ano a me ke ano o keia mea, e ae oe e pohihihi mai i wahi mea pono e hana ia. Isotactic polypropylene ua manawa manao like ka loa hanohano i loko o ka hana. Keia mea aie a hiki i ka hiʻona o keʻano o ka mea, i ka kūikawā pilikia ma kaʻaoʻao pūʻulu i CH3, Aia hana me ka pili ana i ka papa kuhikuhiE kaulahao. Oia poepoe i ho'ākāka 'walaʻauʻana ano e e anao? Aou iwaena o lakou: o ka hiki, e noho ma kona helehelena ma kiʻekiʻe mahana, paakiki, a kiʻekiʻe ikaika.