What Are the Different Types of Water Based Adhesive?

The starch binder is actually a raw additive that is pumped to the corrugator and then applied to the corrugated peak. When it is in a raw state, it is not sticky, and only when it is heated to a certain temperature on the paste line, it will become a strong adhesive.

Water-based adhesive

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Starch binder is actually a raw

Water-based adhesives mainly dry or bond by absorbing water on the surface. The raw solid starch in the adhesive gels and absorbs water on the paste line. The bonding time is from a few seconds to about a minute. Water is gradually absorbed by the surrounding air and paper fibers. This traditional way of adhesive is commonly used

To achieve a satisfactory cohesive effect, a slightly viscous suspoemulsion must be added to the starch and water emulsion, which contains pregelatinized starch. This suspension emulsion can suspend raw starch in water and prevent its sedimentation; increase the concentration to facilitate being coated on the sizing roller and form a paste film of appropriate thickness on the roller; adjust the viscosity so that the paper fibers are properly wetted and initially adhered; ensure There is a lot of water around the raw starch molecules, so that the starch can swell to the maximum and completely gelatinize when heated; caustic soda must be added to adjust and control the gelatinization temperature of the starch to a minimum.

In order to achieve a satisfactory bonding effect, borax must also be added to make the raw starch absorb all available water when it is heated; to make the starch produce appropriate viscosity and toughness when gelatinized; to act as a buffer and prevent caustic soda Swell a portion of the raw starch below the minimum gelatinization temperature.

It is used for plywood, solid wood dining table, dining chair, solid wood door, wooden musical instrument, wooden handicraft, bamboo products, etc. It is suitable for splicing of hardwood such as pestle wood, manchurian ash, beech wood.

It has high adhesive strength, excellent water resistance and weather resistance, and its performance meets Japanese JAS and European D4 standards. It is a green product and meets Japanese F (F4 star) and European E1 environmental standards.

Viscosity: A22898 6000-20000CP / 20 ° C A21008 200-300CP / 20 ° C

Appearance: liquid

PH value: 5-7

Coating volume: 140-280 g / m2

Pressing time: pressurize at room temperature for at least 45 minutes

Pressure: 10-15 kg / cm2

Most water-resistant adhesives have a limited life. Some gradually thicken over time, and cannot be avoided even with agitation. Some mechanical operation performance is good, but the degree of water resistance is greatly reduced. Therefore, the adhesive must be used as soon as possible after preparation.