He kuleana koʻikoʻi nā pauka polymer redispersible (RDPs) i nā ʻoihana like ʻole, me ke kūkulu ʻana, nā adhesives, a me nā uhi. Hoʻohana nui ʻia kēia mau pauka no ka hoʻomaikaʻi ʻana i nā waiwai o nā mea cementitious, hoʻonui i ka adhesion, hiki ke maʻalahi, a me ka lōʻihi. He mea nui ka hoʻomaopopo ʻana i ke kaʻina hana o nā RDP no nā mea hana e hōʻoia i nā huahana kiʻekiʻe.
Mea Maka:
Hoʻomaka ka hana ʻana i nā pauka polymer redispersible me ke koho pono ʻana i nā mea maka e hoʻoikaika i nā waiwai o ka huahana hope. ʻO nā ʻāpana mua he resins polymer, colloids pale, plasticizers, a me nā mea hoʻohui like ʻole.
Polymer Resins: Ethylene-vinyl acetate (EVA), vinyl acetate-ethylene (VAE), a me nā polymers acrylic e hoʻohana mau ʻia e like me nā resins polymer nui. Hāʻawi kēia mau resins i ka adhesion, ka maʻalahi, a me ka pale wai i nā RDP.
Nā Colloid Palekana: Hoʻohui ʻia nā colloids pale hydrophilic e like me ka polyvinyl alcohol (PVA) a i ʻole cellulose ethers e hoʻopaʻa i nā ʻāpana polymer i ka wā maloʻo a me ka mālama ʻana, e pale ana i ka hōʻuluʻulu ʻana.
Plasticizers: Hoʻonui ka Plasticizer i ka maʻalahi a me ka hana o nā RDP. ʻO nā mea plasticizer maʻamau ka glycol ethers a i ʻole polyethylene glycols.
Hoʻohui: Hiki ke hoʻohui ʻia nā mea hoʻohui like ʻole e like me nā dispersants, thickeners, a me nā mea hoʻohui cross-linking e hoʻomaikaʻi i nā waiwai kikoʻī e like me ka dispersibility, rheology, a i ʻole ka ikaika mechanical.
Nā ʻenehana hana:
ʻO ka hana ʻana o nā pauka polymer redispersible e pili ana i kekahi mau kaʻina hana paʻakikī, me ka polymerization emulsion, ka hoʻomaloʻo ʻana, a me nā kaʻina hana ma hope o ka mālama ʻana.
Emulsion Polymerization:
Hoʻomaka ke kaʻina hana me ka polymerization emulsion, kahi i hui pū ʻia ai nā monomers, ka wai, nā emulsifiers, a me nā mea hoʻomaka i loko o kahi reactor ma lalo o nā kūlana hoʻomalu o ka mahana a me ke kaomi. ʻO nā monomers polymerize e hana i nā ʻāpana latex i hoʻopuehu ʻia i ka wai. ʻO ke koho ʻana o nā monomers a me nā kūlana hopena e hoʻoholo ai i ka haku mele polymer a me nā waiwai.
Hoʻopaʻa a me ka Coagulation:
Ma hope o ka polymerization, e hoʻomau ka latex ma o ka hoʻohui ʻana i nā colloids pale a me nā stabilizers. Mālama kēia ʻanuʻu i ka coagulation particle a hōʻoia i ka paʻa o ka latex dispersion. Hiki ke hoʻokomo ʻia nā mea hana coagulation no ka hoʻoulu ʻana i ka coagulation hoʻomalu ʻia o nā ʻāpana latex, e hana i kahi coagulum paʻa.
Hoʻomaloʻo ʻana:
Hoʻopili ʻia ka latex dispersion i hoʻopaʻa ʻia i loko o kahi mea maloʻo. I loko o ke keʻena hoʻomaloʻo ʻana, ua ʻātomized ka dispersion i nā kulu liʻiliʻi me ka hoʻohana ʻana i nā nozzles kiʻekiʻe. Hoʻokomo ʻia ka ea wela i ka manawa like e hoʻopau i ka ʻike wai, e waiho ana i nā ʻāpana polymer paʻa. ʻO nā kūlana maloʻo, me ka wela o ka ea inlet, ka manawa noho, a me ke kahe o ka ea, e hoʻopili i ka morphology particle a me nā waiwai pauka.
Ma hope o ka mālama ʻana:
Ma hope o ka hoʻomaloʻo ʻana, ʻo ka pauka polymer e loaʻa ana i nā kaʻina hana ma hope o ka mālama ʻana e hoʻomaikaʻi i kāna hana a me ka paʻa o ka mālama ʻana. Hiki i kēia mau kaʻina hana ke komo i ka hoʻololi ʻana i ka ʻili, granulation, a me ka hoʻopili.
a. Hoʻololi i ka ʻili: Hiki ke hoʻohana ʻia nā mea hana i luna a i ʻole nā mea hoʻopili cross-linking e hoʻololi i nā waiwai o ka ʻili o nā ʻāpana polymer, e hoʻomaikaʻi ana i ko lākou dispersibility a me ka launa pū me nā mea ʻē aʻe.
b. Granulation: No ka hoʻomaikaʻi ʻana i ka lawelawe ʻana a me ka hoʻopuehu ʻana, hiki i ka pauka polymer ke hana i ka granulation e hana i nā ʻāpana like ʻole a hoʻemi i ka hoʻokumu ʻana o ka lepo.
c. Packaging: Hoʻopili ʻia nā RDP hope loa i loko o nā pahu wai e pale ai i ka komo ʻana o ka wai a mālama i ko lākou kūpaʻa i ka wā o ka mālama ʻana a me ka lawe ʻana.
Nā ana mana maikaʻi:
Pono ka mana maikaʻi i loko o ke kaʻina hana e hōʻoia i ka kūlike a me ka hilinaʻi i nā waiwai o nā pauka polymer redispersible. Ke nānā ʻia a mālama ʻia kekahi mau ʻāpana koʻikoʻi ma nā pae like ʻole:
ʻOi aku ka maikaʻi o ka waiwai: ʻO ka nānā pono ʻana a me ka hoʻāʻo ʻana i nā mea maka, me nā polymers, colloids, a me nā mea hoʻohui, e hana ʻia e hōʻoia i ko lākou maikaʻi, maʻemaʻe, a me ka hoʻohālikelike ʻana me ka noi i manaʻo ʻia.
Nānā Kaʻina Hana: Ke nānā mau ʻia a hoʻoponopono ʻia nā ʻāpana kaʻina hana koʻikoʻi e like me ka wela o ka hopena, ke kaomi ʻana, ka nui o ka hānai monomer, a me nā kūlana maloʻo e mālama mau i ka maikaʻi o ka huahana a me ke kūlike.
ʻAno ʻāpana: Hoʻopili ʻia ka mahele nui o ka ʻāpana, morphology, a me nā waiwai o ka ʻili o nā pauka polymer me ka hoʻohana ʻana i nā ʻenehana e like me ka laser diffraction, electron microscopy, a me ka nānā ʻana o ka ʻili.
Ka ho'āʻo hoʻokō: ʻO nā pauka polymer redispersible e hoʻāʻo nui i ka hana e loiloi i ko lākou ikaika adhesive, hoʻokumu kiʻiʻoniʻoni, kūpaʻa wai, a me nā waiwai mechanical e like me nā kūlana ʻoihana a me nā koi o ka mea kūʻai aku.
Ho'āʻo Stability: Hoʻomaʻamaʻa ʻia nā hoʻokolohua ʻelemakule a me nā haʻawina kūpaʻa e loiloi i ka paʻa lōʻihi o nā RDP ma lalo o nā kūlana mālama like ʻole, me nā ʻano like ʻole o ka mahana a me ka haʻahaʻa.
ʻO ka hana ʻana i nā pauka polymer redispersible e pili ana i nā ʻanuʻu paʻakikī, mai ka polymerization emulsion a hiki i ka hoʻomaloʻo ʻana a me nā kaʻina hana ma hope o ka mālama ʻana. Ma ka mālama pono ʻana i nā mea maka, nā ʻāpana hana, a me nā ana mana o ka maikaʻi, hiki i nā mea hana ke hōʻoia i ka maikaʻi a me ka hana o nā RDP no nā noi like ʻole i ke kūkulu ʻana, adhesives, a me nā ʻoihana uhi. He mea nui ka hoʻomaopopo ʻana i ka paʻakikī o ke kaʻina hana no ka hoʻonui ʻana i nā hiʻohiʻona huahana a me ka hoʻokō ʻana i nā pono ulu o nā mea kūʻai aku ma ka mākeke.
Ka manawa hoʻouna: Mar-12-2024