Adhesive for rubber footwear lasting and preparation method of adhesive

Abstract

The invention discloses an adhesive for rubber footwear lasting and a preparation method of the adhesive. The adhesive comprises the following raw materials in parts by weight: 1# standard rubber, zinc oxide, stearic acid, an accelerant M, an accelerant D, an anti-aging agent D, light calcium carbonate, rosin, 1# standard rubber threads, 120# gasoline, a terpene resin, industrial alcohol and sulfur. The adhesive has high initial adhesion and adhesive properties and is high in cohesive strength, and even if the adhesion is ineffective under temperature conditions of a drying oven, a phenomenon that the lasting is loosened is difficultly caused. Meanwhile, the adhesive has the characteristics of low price, low toxicity, quick dryness and simplicity in manufacture. In the preparation method, high molecular weight of natural rubber is kept, and the rubber footwear lasting is difficultly loosened under the drying conditions after being adhered. Moreover, the condition that the initial adhesion of the high molecular weight raw rubber threads does not meet the adhesion requirement is improved by directly adding a tackifier terpene resin into an adhesive cement pot, the industrial alcohol is added to reduce the viscosity, the brushing properties of the high molecular weight rubber threads are improved, and the raw foam rubber vulcanization speed is increased.

Description

technical field [0001] The invention relates to an adhesive for shoes, in particular to an adhesive for rubber shoe uppers and a preparation method thereof. Background technique [0002] Adhesives for shoes are used in hot-vulcanized rubber shoe molding lines, and are used for bonding and fixing between rubber shoe uppers and secondary vulcanized rubber sponges during the bonding process of uppers and secondary vulcanized sponges (commonly known as "brackets"). The properties that the adhesive should have: good initial tack, good adhesion retention, especially under the condition of oven temperature (generally 40°C to 60°C), it is not easy to "loosen" (that is, the adhesion will fail), and the cohesive strength is high. The characteristics of several adhesives commonly used in the prior art are as follows: 1. Using adhesive neoprene and various resin glues: the initial tack and adhesion retention can meet the above requirements, but contain benzene series or ketones that are...

AI Technical Summary

Problems solved by technology

The characteristics of several adhesives commonly used in the prior art are as follows: 1. Using adhesive neoprene and various resin glues: the initial tack and adhesion retention can meet the above requirements, but contain benzene series or ketones that are harmful to the human body 2. Water-based natural latex: the adhesion retention performance meets the above requirements, but the initial viscosity is poor. Because it is a water-based liquid, it dries slowly and affects production. Efficiency; due to the small surface tension, it is easy to drip and flow when painting, and it is easy to pollute the upper, and the price is in the middle

The gasoline mortar in the prior art is easy to loosen under drying conditions. In order to increase the viscosity of the glue, the natural rubber is often over-plasticized to greatly reduce the molecular weight of the preparation method, but this reduces the natural rubber under drying conditions. Excellent adhesive retention, and the molecular weight is small, the adhesive strength drops more at high temperature, and it is very easy to loosen the side