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发明公开
CN101875737A 食品级高熔指低密度注塑级聚乙烯树脂 无效 - 驳回

食品级高熔指低密度注塑级聚乙烯树脂
摘要：
本发明涉及食品级高熔指低密度注塑级聚乙烯树脂，是在190℃，2.16kg/cm3，实验方法：GB/T3682-2000下以熔指MI:18～22g/10min；实验方法：GB1033-1986下密度DE：0.918～0.922g/cm3的聚乙烯树脂作为基料，其中树脂基料为丁烯-1与乙烯共聚物，丁烯-1含量9.5～10.5wt％；酸中和剂为硬脂酸锌。抗氧剂可选择一种或二种的受阻类抗氧剂或亚磷酸酯类。各组份的配比为：W/W，树脂基料：硬脂酸锌＝100：0.05～0.20；树脂基料：抗氧剂＝100：0.01～0.15。该注塑料用于各种形状食品保鲜盒盖的制造，具有良好的耐低温性。
摘要（英）：

The invention relates to a food-grade high melt index and low density injection molding polyvinyl resin. Under the condition of 190 DEG C and 2.16kg/cm<3>, the experiment method comprises the melt index MI: 18-22g/10min below GB/T 3682-2000; the experiment method comprises: taking polyvinyl resin with the density DE: 0.918-0.922g/cm<3> below GB 1033-1986 as base material, wherein the resin base material is butene-1 and ethylene copolymer, and the butene-1 has the content of 9.5-10.5wt%; and acid neutralizing agent is zinc stearate. One or two blocked antioxidant or phosphite esters can be selected as antioxidant. The mixture ratio W/W between the resin base material and the zinc stearate is 100: 0.05-0.20, and the mixture ratio between the resin base material and the antioxidant is 100: 0.01-0.15. The injection molding material can be used for manufacturing food fresh keeping boxes with various shapes, and has good low temperature resistance.

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