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首页> 外文期刊>Maderas: ciencia y tecnologia >Kraft scrap paper pulp as a substitute of wood chips in manufacture of particleboards resinated with hybrid pf/pmdi resin
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Kraft scrap paper pulp as a substitute of wood chips in manufacture of particleboards resinated with hybrid pf/pmdi resin

机译：牛皮纸废纸浆可替代木屑，用于制造用混合pf / pmdi树脂树脂化的刨花板

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This study analyzed feasibility of manufacture of composite particleboards resinated with a mixture of phenol-formaldehyde resin and 4,4′-methylenediphenyl isocyanate in the weight ratio 70:30. For this purpose 3-layer particleboards were produced with varying shares of Kraft scrap paper pulp in the core. Experimental boards were manufactured applying 0, 10, 15, 25, 50 and 75% substitution of wood chips with Kraft paper pulp. Analyses were conducted to determine physico-mechanical properties of boards, i.e. bending strength, modulus of elasticity, internal bond before and after the boiling test and swelling in thickness after 24 soaking in water. Based on recorded testing results it was stated that moisture resistant composite boards manufactured with a 25% substitution of wood chips with Kraft paper pulp meet the requirements of the EN 312 standard for boards used in humid conditions in terms of their strength and moisture resistance specified in the internal bond after the boiling test.
机译：这项研究分析了制造重量比为70:30的酚醛树脂和4,4'-亚甲基二苯基异氰酸酯的混合物树脂化的复合刨花板的可行性。为此目的，生产了三层刨花板，其芯中有不同份额的牛皮纸废纸浆。通过用牛皮纸纸浆替代木屑的0％，10％，15％，25％，50％和75％来制造实验板。进行分析以确定板的物理机械性能，即弯曲强度，弹性模量，沸腾试验之前和之后的内部粘合以及在水中浸泡24小时后厚度的膨胀。根据记录的测试结果，可以得出结论，用牛皮纸纸浆替代木屑的25％制成的防潮复合板在强度和耐湿性方面均达到了EN 312标准的要求，适用于潮湿条件下使用的纸板。沸腾测试后的内部键。

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