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    • CommentAuthorqzz10011
    • CommentTimeSep 30th 2016
     
    <p>The formaldehyde emission of wood flooring due to the production of all the adhesives containing free formaldehyde, if excessive formaldehyde from the <a href="http://wpcdeckingfence.com/decking-fence/4743.html">rooftop deck design ideas</a> floor around the lax release will be harmful to humans. </p>
    <p>National standards GB18580-2001 provides that laminate flooring through the dryer method of testing, must meet the E1 standard, that is, formaldehyde emission of not more than 1.5mg / L. 3, the substrate density Laminate flooring now there are two main substrates: one is a high-density fiberboard, density 0.82-0.94g / cm3, the other is a special form of particleboard. National GB / T18102 standards, substrate density greater than or equal 0.80g / cm3 for qualified. The higher the substrate density, the mechanical properties of the <a href="http://wpcdeckingfence.com/decking-fence/6806.html">metal cladding wall panel systems</a> floor, the higher the impact resistance. But it is not the bigger the better. Under the same conditions, the higher the density of the substrate, the swelling thickness of the water absorption is too large, poor dimensional stability. 4, the thickness of water swelling Thickness of water swelling reflects the product's water resistance, the lower the value of the index, the better the water resistance. Poor water resistance of the floor in a humid environment, if the seal around the floor lax, may occur more obvious expansion, causing dimensional changes. </p>
    <p>Changes in the size of the General Assembly caused the floor from the arch, thereby affecting the <a href="http://wpcdeckingfence.com/decking-fence/6816.html">tongue and groove cedar boards</a> floor life. The same thickness of the product, the greater the swelling thickness of water absorption, dimensional stability is worse.</p>
    • CommentAuthorvalexcos
    • CommentTimeJul 7th 2018
     
    • CommentAuthorvalexcos
    • CommentTimeJul 7th 2018
     
    • CommentAuthorvalexcos
    • CommentTimeJul 7th 2018
     
    • CommentAuthorvalexcos
    • CommentTimeJul 7th 2018
     
    • CommentAuthorvalexcos
    • CommentTimeJul 7th 2018
     
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