Laminated iko bụ iwu nke abụọ lites nke galsss bonde togma site na nrapado ihe - a polyvinyl butol (PVB) Nke a na-adịghị ahụ anya PVBlayer e mere ka iko integral na Ọdịdị n'elu mebiri, kama ikwe ka iko na-akụrisị n'ime ma ọ bụghị nnukwu. , nkọ, na ize ndụ piedes.PVB nwekwara dulls n'ọnụ nke gbajiri shards nke iko, pụtara ìhè eweda n'ihe ize ndụ nke mmerụ. Mgbe undergaing a usoro nke kpo oku na ịpị, The abụọ lites nke iko na PVB interlayer ghọrọ otu siri ike, inogide iko ewu.