ʻO ke kumu a me nā hoʻololi o ka hoʻoheheʻe ʻana i ka lāʻau lapaʻau

He elasticity maikaʻi ka Rubber, akā pilikia nui kēia waiwai waiwai i ka hana huahana. Inā ʻaʻole i hoʻemi mua ʻia ka elasticity o ka lāʻau maka, ʻo ka hapa nui o ka ikehu mechanical e hoʻopau ʻia i ka deformation elastic i ka wā o ke kaʻina hana, a ʻaʻole hiki ke loaʻa ke ʻano i makemake ʻia. Loaʻa i ka ʻenehana hana Rubber kekahi mau koi no ka plasticity o ka lāʻau maka, e like me ka hui ʻana, ka mea maʻamau e koi i ka viscosity Mooney ma kahi o 60, a me ka holoi ʻana i ka lāʻau, e koi ana i ka viscosity Mooney ma kahi o 40, Inā ʻaʻole, ʻaʻole hiki ke hana maʻalahi. . Kekahi maka adhesives loa paakiki, kiʻekiʻe viscosity, a nele kumu a me ka pono kaʻina waiwai - maikaʻi plasticity. I mea e hoʻokō ai i nā koi o ke kaʻina hana, pono e hoʻopili ʻia ka ʻōpala maka e ʻoki i ke kaulahao mole a hoʻemi i ke kaumaha mole ma lalo o ka mechanical, thermal, chemical a me nā hana ʻē aʻe. ʻO kahi pūhui plastik e nalowale ana kona elasticity no kekahi manawa a lilo i palupalu a malleable. Hiki ke ʻōlelo ʻia ʻo ka hoʻoheheʻe ʻana i ka lāʻau maka ke kumu o nā kaʻina hana ʻenehana ʻē aʻe.
ʻO ke kumu o ka hoʻoheheʻe ʻana i ka lāʻau lapaʻau, ʻo ia ka: ʻo ka mea mua, e loaʻa i kahi pae o ka plasticity no ka ʻōpala maka, e kūpono ai no ka hui ʻana, ka ʻōwili ʻana, extrusion, hoʻokumu ʻana, vulcanization, a me nā koi o nā kaʻina hana e like me ka rubber slurry a me ka sponge rubber. hana hana; ʻO ka lua, ʻo ia ka homogenize i ka plasticity o ka ʻōpala maka i mea e hana ai i kahi mea hao me ka maikaʻi like.
Ma hope o ka plasticizing, hoʻololi pū ʻia nā waiwai kino a me nā kemika o ka lāʻau maka. Ma muli o ka ikaika mechanical a me ka oxidation, e hoʻololi ke ʻano molecular a me ke kaumaha molekala o ka lāʻau i kekahi ʻano, no laila e loli pū nā waiwai kino a me nā kemika. Hōʻike ʻia kēia ma ka emi ʻana o ka elasticity, ka piʻi ʻana o ka plasticity, ka piʻi ʻana o ka solubility, ka emi ʻana o ka viscosity o ka hopena rubber, a me ka hoʻomaikaʻi ʻana i ka hana adhesive o ka mea hao. Akā e like me ka piʻi ʻana o ka plasticity o ka ʻōpala maka, e emi ana ka ikaika mechanical o ka rubber vulcanized, piʻi ka deformation mau, a me ke kūpaʻa ʻana a me ke kūpaʻa ʻelemakule. No laila, ʻo ka plasticization o ka ʻōpala maka he mea maikaʻi wale nō ia no ke kaʻina hana kaʻa, a ʻaʻole kūpono i ka hana o ka vulcanized rubber.