包装论文：耐水增强剂对无硼载体淀粉胶性能影响的研究

摘  要

介绍了无硼载体淀粉胶粘剂的制备原理及制备工艺，着重论述了增强剂和耐水剂对无硼载体淀粉胶粘剂的粘度、初粘度、粘结强度、边压强度及耐水性能的影响。添加不同量的增强剂P、R和H及耐水剂高聚物4和自制高聚物分别对无硼载体淀粉胶粘剂进行条件实验。确定了复合增强剂P、R和H的比值为P:R:H=4:1:3；复合耐水剂的组成为高聚物4和自制高聚物，其比值为高聚物4：自制高聚物=2：13。实验表明用8%（按淀粉重量百分比，以下均同）的增强复合剂，15%的耐水复合剂制备的无硼载体淀粉胶粘剂的粘度为36.5s（国家标准为30～50s），初粘度（即破纸率）为99.3%＞98.5%。用该胶粘剂裱制的瓦楞纸板的粘结强度为2360N/m，边压强度为3890N/m，都超过了东莞海富纸品有限责任公司生产的同纸质瓦楞纸板的粘结强度(1800N/m)和边压强度(3500N/m)，耐水性能为75h。该淀粉胶粘剂不凝胶，不分层，不沉底，循环使用不变稀，该淀粉胶粘剂粘制的瓦楞纸板不返潮、不发软。该胶粘剂用三氯化铁取代了长期使用的有毒的交联剂硼砂，是一种理想环保型淀粉胶粘剂。

关键词：淀粉胶粘剂，粘度，增强剂，耐水剂

 
ABSTRACT

  This paper describes the preparation mechanism and technique for the preparation of boron-free starch adhesive with carrier. Our research focuses on the impact of reinforcing agent and water resistant agent on the viscosity, early viscosity, water resistance, bond strength and compressive strength of boron-free starch adhesive with carrier. The condition experiments were carried out using different amount of reinforcing agents P, R, and H and water resistant agents polymer 4 and home-made polymer to study their effects on the boron free starch adhesive. After analyzing the results, the best ratio of P: R: H in the composite reinforcing agent is 4:1:3. The best ratio between polymer 4 and home-made polymer in the composite water resistant agent is 2: 13, and the actual amount used is 15% (weight percent of starch). The viscosity of as-prepared starch adhesive with the optimized experimental conditions is 36.5 seconds. Its initially stick force (broken paper rate) 99.3%. The corrugated cardboards made with this adhesive have bond strength of 2360N/m, compressive strength of 3890N/m. The corrugated boards made by the Haifu Paper Packaging Ltd have adhesive bond strength of 1800N/m and compressive strength of 3500N/m. Thus, the corrugated boards have better quality than those produced by Haifu Paper Packaging Ltd. Their water resistant performance has achieved 75 hours. 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: starch adhesives, viscosity, strength agent, water-resistant agents

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