◆ The procedure of bonding process:◆ The adhesive surface should be evenly coated to ensure infiltration, as far as possible to avoid bubbles, due to the porosity of the adhesive strength greatly reduced, resulting in degumming.Attention should be paid to the alignment of the position, not staggered, can be pressurized, air exclusion, make it close contact. Time is three important parameters of curing process and the change of each parameter has direct influence on bonding strength, (each kind of adhesive has a specific curing temperature and time), curing at a certain pressure, it should be said that it is necessary for all Water, avoid bubble pores and make the adhesive layer uniform and fixed position.Whether by chemical reaction or physical action to complete the adhesive curing, it takes a certain amount of time, in order to cure completely get the adhesive strength, must ensure that there is enough curing time,(this is usually referred to a certain amount of time to make the adhesive to reach the final adhesion).

Water-based acrylic glue (viscose) market is often called the invisible market, we usually can not see, but in fact, very much. Water-based Water based glue because water as a solvent acrylic or polyurethane resin through special emulsifying equipment, emulsified,So the advantages are: variety of environmental protection, now there are a lot of coating is water-soluble glue, the effect is better water-based polyurethane glue water-based PU glue water-soluble with its functional environmental protection and low price, will be the direction of the future coating, Oily glue is based on oily solvent (toluene DMF butanone, etc.) as a solvent, acrylic acid or polyurethane dissolved.welcome you to consult, this is our email sales@sinogracechem.com

Acrylic pressure sensitive adhesive is a large range, PUR is one of them, most of the acrylic pressure sensitive adhesive is heated operation, can be reheated after bonding, is reversible.And PUR is wet reaction acrylic pressure sensitive adhesive, heating operation, after bonding and moisture in the air reaction, after the reaction is irreversible (that is, heating will not melt). So PUR is more resistant to low and high temperatures. Acrylic pressure sensitive adhesive： Acrylic pressure sensitive adhesive - moisture curing reaction type polyurethane acrylic pressure sensitive adhesive, acrylic pressure sensitive adhesive spraying technology support. PUR(PolyurethaneReactive), in Chinese, it is called wet gas curing reactive polyurethane acrylic pressure sensitive adhesive.  The secondary component is isocyanate - terminated polyurethane prepolymer.The bonding and toughness (elasticity) of PUR can be adjusted, and has excellent bonding strength, temperature resistance, chemical corrosion resistance and aging resistance.  In recent years, it has become one of the important types of adhesive industry.  Now it is widely used in packaging, wood processing, automobile, textile, electromechanical, aerospace and other national economic categories. PUR adhesive is a molecular structure containing polarity and chemical activity of ammonia ester group (-NHCOO-) or isocyanate ester group (-NCO), and contains vivid hydrogen data, such as wood, leather, fabric, paper, ceramics and other porous data and plastic, metal, glass, rubber and other bright appearance data have excellent adhesion. welcome you to consult, this is our email sales@sinogracechem.com

Waterborne polyurethane fabric coating agent can give the fabric a good soft and plump feel and skin feeling, and the anti-wrinkle, anti-shrinkage, resilience and flexure of the coated fabric have been greatly improved, waterproof waterproof polyurethane fabric coating agent has become the fabric manufacturers and consumers favored object.So how does waterborne polyurethane work as a waterproofing agent in fabrics. Waterborne polyurethane can bond tightly to the surface of the fabric and form a continuous and dense film, which is the key to realize its waterproof performance. The tighter the waterborne polyurethane membrane, the less water molecules are easy to penetrate, and the tighter the waterborne polyurethane and fabric bonding, the more water resistant and not easy to fall off.The adhesion between waterborne polyurethane and fabric is mainly related to the polar groups contained in the structure, such as ammonia ester bond, urea bond, ion bond, etc. There are coulomb force, van der Waals attraction and hydrogen bond between them and fabric surface.The ideal bonding state is that the adhesion between waterborne polyurethane and fabric is greater than the cohesion of fabric, but less than the cohesion between waterborne polyurethane.The density of film formation is related to the cohesive energy of waterborne polyurethane molecules. The greater the cohesive energy is, the smaller the distance between molecules is, the more compact the structure is, and the more dense the film formation is At the same time, in order to maximize the degree of waterproof, the surface tension of waterborne polyurethane film is reduced as much as possible, so that the contact Angle between water droplets and waterborne polyurethane film increases, water droplets are not easy to spread out on the surface of waterborne polyurethane, thus reducing the infiltration effect of water droplets on waterborne polyurethane coating agent. Sinograce Chemical, specializing in the production of waterborne polyurethane series products for many years, non-toxic environmental protection we have a professional team, with a professional attitude, to solve the problems in practical application for you if you are interested in our waterborne polyurethane products or have doubts, Sinograce Chemical chemical welcome you to consult, this is our email sales@sinogracechem.com