High-wet-strength hot melt adhesive for glass container and preparation method thereof

Abstract

The invention discloses a high-wet-strength hot melt adhesive for a glass container and a preparation method thereof. The high-wet-strength hot melt adhesive comprises the following components in percentage by mass: 12-20% of rubber oil, 22-32% of a rubber polymer, 40-55% of tackifying resin, 3-14% of polyolefin, 0.1-1% of an antioxidant and 0.3-1.5% of a coupling agent. The sum of the mass percentages of the components is 100%. According to the hot melt adhesive prepared by the preparation method, when high-concentration moisture exists in a storage environment, the bonding strength of the hot melt adhesive on the glass container cannot be reduced by water condensed on a bonding interface, and the bonding strength is improved to a certain extent on the contrary; besides, through improvement of the formula, the dispersion effect of the coupling agent is greatly improved, meanwhile, in the preparation process, the vacuumizing time is prolonged at low temperature, finally, the finished product is free of bubbles and impurities, and the stability of various performance indexes is greatly improved.

Description

technical field [0001] The invention relates to the application field of hot-melt adhesives, in particular to a high-wet-strength hot-melt adhesive for glass containers and a preparation method thereof. Background technique [0002] At present, in order to avoid changes in the taste and quality of drinks caused by high temperatures, some high-end drinks usually use low-temperature storage or refrigerate glass containers before filling them. When the ambient temperature gradually rises, a small amount of Condensed water, and the existence of water on the surface of the glass container will cause ordinary hot-melt pressure-sensitive adhesives to fail to bond well, causing the hot-melt adhesive to fall or fail to fit. [0003] The reactive moisture-curing hot-melt adhesive can solve the above problems, but its price is high due to its strict preparation, packaging, storage, transportation, and final use; The process needs to control external factors such as reaction temperatur...

AI Technical Summary

Problems solved by technology

[0002] At present, in order to avoid changes in the taste and quality of drinks caused by high temperatures, some high-end drinks usually use low-temperature storage or refrigerate glass containers before filling them. When the ambient temperature gradually rises, a small amount of Condensed water, and the existence of water on the surface of the glass container will cause ordinary hot-melt pressure-sensitive adhesives to fail to bond well, causing the hot-melt adhesive to fall or fail to fit

[0003] The reactive moisture-curing hot-melt adhesive can solve the above problems, but its price is high due to its strict preparation, packaging, storage, transportation, and final use; The process needs to control external factors such as reaction temperature and pressure. The reaction process needs to strictly control the process to prevent implosion or incomplete reaction. At the same time, the entire production process needs to be carried out under the condition of isolating water vapor, and nitrogen protection is required. , it is also necessary to use a professional cleaning agent to clean the reactor to avoid the reaction of the glue remaining in the reactor with the water vapor in the air, causing damage to the reactor; and the packaging needs to be packed in aluminum bags or iron drums to avoid Avoid contact with water vapor in the air, and the packaging materials are more expensive; in addition, when the reactive hot melt adhesive is stored and transported, it is necessary to avoid product contact with the air. Damage to the packaging will directly cause the product to fail due to the reaction with the water vapor in the air. For reuse, the glue machine equipment also needs to use professional glue machine equipment that can be filled with nitrogen for protection; in the final glue spraying operation, special hot-melt glue equipment is also required, and the performance of reactive hot-melt glue can only be guaranteed by nitrogen protection. The stability of the system has high requirements for personnel operation and equipment

[0004] The above reasons lead to the high price of the moisture-curing hot melt adhesive, which is 2-5 times the price of ordinary hot melt adhesives.

However, ordinary hot-melt adhesives cannot be bonded to glass containers with water on the surface, and the pressure-sensitive adhesive products that have been bonded to glass containers will greatly reduce their bond strength in high-humidity environments, and even fall off directly

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