包装论文：交联剂对一步法淀粉胶粘剂性能影响的研究

摘  要

论述了一步法淀粉胶粘剂的研制原理与制备工艺，着重研究了交联剂对一步法淀粉胶粘剂的性能的影响。用不用重量的交联剂硼砂、氯化铁、磷酸钠、硫酸铜、氯化锰分别对一步法淀粉胶粘剂性能影响的条件试验，确定了氯化铁作交联剂。通过添加不同量的蒙脱石、PVA对氯化铁进行对照实验,实验结果表明,用0.8% 氯化铁（按淀粉的百分比重量计，以下均同）、8%蒙脱石、10%PVA制备的淀粉胶粘剂，其粘度为39.4秒，初粘度为98.4%，该胶粘剂粘制的瓦楞纸板粘结强度是2419N/m，边压强度为3660N/m，都超过了同纸质的东莞海富纸品有限公司生产的瓦楞纸板的边压强度（3500 N/m）和粘结强度（1800 N/m），耐水时间74小时。该胶粘剂不凝胶，不分层，不返潮，不发软，用氯化铁取代了长期使用的有毒交联剂硼砂，是环保型交联剂，可推广应用。

关键词：氧化，淀粉胶粘剂，交联剂，瓦楞纸板
ABSTRACT

This paper describes the preparation mechanism and technique for the preparation of one-step synthesized starch adhesive. Our research focuses on the impact of crosslinkers on the viscosity, early viscosity, water resistance, bond strength and compressive strength of starch adhesive. The condition experiments were carried out using different amount of crosslinkers such as borax, ferric chloride, sodium phosphate, and CuSO4, MnCl4 to study their effects on the boron free starch adhesive. After analyzing the results after the addition of different amount of montmorillonite and PVA, the best crosslinker is ferric chloride and the actual amount of composite polymer additive used is 0.8% (weight percent of starch). The viscosity of starch adhesive prepared with the 0.8% ferric chloride, 8% montmorillonite and 10% PVA  is 39.4 seconds. Its initially stick force (broken paper rate) 98.4%. The corrugated cardboards made with this adhesive have bond strength of 2419N/m, compressive strength of 3660N/m. The corrugated boards made by the Haifu Paper Packaging Ltd have adhesive bond strength of 1800N/m and compressive strength of 3500N/m. The water resisitant performance is 74 hours. Thus, the corrugated boards have better quality than those produced by Haifu Paper Packaging Ltd. All test results indicated that the performance of the corrugated boards made with our adhesive has surpassed the national standard. This adhesive has stable performance. The corrugated board made with this adhesive dries very quickly, has good water resistant performance, and is very suitable for industrial production of adhesive.

Keywords: oxidation, oxidized starch adhesives, crosslinking agent, corrugated board

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