Flame-retardant hot melt adhesive meeting requirements of spraying process and preparation method thereof

Abstract

The invention discloses a flame-retardant hot melt adhesive meeting requirements of a spraying process and a preparation method of the flame-retardant hot melt adhesive. The flame-retardant hot melt adhesive comprises the following components in percentage by mass: 10-50% of a polymer, 10-30% of a plasticizer, 30-70% of tackifying resin, 0.1-2% of an antioxidant, 1-20% of a liquid flame retardantand 0-10% of zinc borate monomer grafted polystyrene resin, wherein the sum of the mass percentages of the above components is 100%. The flame-retardant hot melt adhesive prepared by the preparation method disclosed by the invention has relatively high stripping force, relatively high initial adhesion and good wettability to a base material, can pass a UL-94 flame-retardant performance test and reaches the flame-retardant grade V-1.

Description

technical field [0001] The invention relates to a hot-melt adhesive, in particular to a flame-retardant hot-melt adhesive satisfying the spraying process and a preparation method thereof. Background technique [0002] Hot melt adhesive is a kind of plastic adhesive, which is an environmentally friendly chemical product. In the field of industrial adhesives, hot melt adhesives are commonly used to bond together a wide variety of articles, including disposable absorbent articles with nonwoven substrates, construction materials, electronic materials, and the like. These raw materials all have flame retardant properties. Most hot melt adhesives in the prior art do not have flame retardant properties. A small part of hot melt adhesives are matched with inorganic flame retardants and organic flame retardants to achieve flame retardant effects, but If the added inorganic flame retardant is to achieve the required flame retardant effect, the addition amount is required to be large,...

AI Technical Summary

Problems solved by technology

These raw materials all have flame retardant properties. Most hot melt adhesives in the prior art do not have flame retardant properties. A small part of hot melt adhesives are matched with inorganic flame retardants and organic flame retardants to achieve flame retardant effects, but If the added inorganic flame retardant is to achieve the desired flame retardant effect, the addition amount is required to be large, and the compatibility between the inorganic flame retardant and the polymer is poor, causing this type of hot melt adhesive to settle and delaminate, which is easy to cause The glue machine is blocked, which is not suitable for fiber spraying, spiral spraying and other spraying processes; and inorganic flame retardants have a great negative impact on the mechanical properties of hot melt adhesives, which will reduce the initial adhesion and peel strength

[0003] For example, the raw materials (PE film, polypropylene spunbonded fabric, composite nonwoven fabric and spunlace fabric) of disposable medical protective clothing, surgical gowns and fire protection clothing currently on the market all have flame retardant properties, and their adhesion The amount of glue used is small, and the coating process requires high requirements (the viscosity should not be too high for spraying construction), and the existing flame-retardant hot melt adhesives that meet the spraying process cannot meet the process requirements

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