Two-component general-purpose water-based heat-sealing adhesive for medical device packaging and preparation method thereof

Abstract

The invention provides double component-based universal type water-based heat sealing adhesive for mechanical equipment packaging as well as a preparation method thereof. The double component-based universal type water-based heat sealing adhesive comprises a component A and a component B which are mutually independent, wherein the component A is an adhesion main body part and has the main effect of heat sealing adhesion strength; and the component B is used for adjusting performance and is cooperatively used with the component A. The component A is prepared from modified water-based polyolefinresin liquid, water-based polyester resin emulsion, a water-based aid and deionized water. The component B is prepared from water-based SBS resin emulsion, low-density polyethylene wax emulsion, styrene acrylate spherical hollow polymer emulsion, a water-based aid and deionized water. The components are prepared by the process of mixing and stirring uniformly. Compared with the prior art, the double component-based universal type water-based heat sealing adhesive has the remarkable beneficial effects: the application range is wide, base materials with different specifications and different manufacturers can be adapted, the influence on air permeability of dialyzing paper is little and the storage stability is more excellent.

Description

technical field [0001] The invention relates to a water-based heat-sealing adhesive product, in particular to a two-component general-purpose water-based heat-sealing adhesive for medical device packaging and a preparation method thereof. Background technique [0002] Closely related to human health, medical devices are a fast-growing industry that must have very safe and reliable packaging. Such as: disposable syringes, various utensils, medical gauze sterilized cotton, medical gloves, etc., must be strictly sterilized and packaged before reaching the hands of medical workers. The general packaging form is: one side is a transparent plastic film, usually PET and other plastics and PE plastic composite (or co-extrusion) to form a multi-layer film; ), this kind of paper is breathable (gas can enter and exit, but bacteria cannot pass through), and it is easy to tear by hand. To heat-seal the dialysis paper and the composite membrane (or coated paper), it is necessary to pre-...

AI Technical Summary

Problems solved by technology

[0006] (1) Poor versatility and limited use: Due to the different manufacturers of medical dialysis paper, and the different raw materials and processes of different manufacturers, it is difficult to ensure that the quality and specifications of the dialysis paper produced are exactly the same, even if the paper produced by one factory , it is also difficult to ensure that the surface state of the paper and the distribution density and strength of the fibers are consistent between batches; Tyvek is also an important material for medical device packaging, and it is often necessary to apply adhesives to achieve appropriate heat-sealing strength and opening effect , different specifications of Tyvek, different types of packaging, also have different requirements; Variety of varieties, together with the influence of bag-making process, environmental climate and human factors, these complex and changeable factors make the situation of glue-coated heat-sealed bags very complicated

Specifically reflected in the glue, it is difficult to ensure that the one-component medical water glue can adapt to various paper products and plastic films and processes. The poor adaptability of water glue is a common confusion among many manufacturers, and this is also a recognized problem in the industry.

[0007] (2) Specifically, it often appears that the comprehensive performance of one kind of glue and the base material of the specified specification is suitable for heat sealing strength, while for the same type of base material of another specification, the heat sealing strength is too low or too large, resulting in the strength Insufficient or too strong, resulting in various defects such as opening the bag, breaking paper and falling paper scraps, causing great inconvenience to users

[0008] (3) The dialysis performance is not ideal: In order to ensure the heat sealing strength of the package, the existing water glue has a large amount of glue (some even have a glue amount of 3-8 grams of dry glue per square meter), which makes the dialysis paper The air permeability of the paper decreases, which affects the dialysis performance of the dialysis paper

Because this kind of water-based heat-sealing glue on the market often contains powdery fillers, the glue will precipitate in the glue tank and block the plate, making the coating uneven, and also causing powdery matter on the surface of the glued paper, causing powder drop pollution. The risk of the packaging also makes the air permeability of the dialysis paper worse, which affects subsequent operations such as gas sterilization

[0009] (4) The storage stability is poor, and the general shelf life is 3 to 6 months

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