How to make your own adhesive How to make a formulation of adhesive

Take a look at the special **, and introduce it there.

Preparation materials: baking soda, toothpaste, detergent, flour, water appropriate amount of production method:

1. Add an appropriate amount of baking soda to the container.

2. Squeeze in 3-5 cm long toothpaste.

3. Add 2 tablespoons of flour.

4. Squeeze in an appropriate amount of detergent.

5. Add a little water.

6. Use a tool to stir all the materials in the container into a paste, that is, to become an adhesive.

7. When using, apply it to the position to be pasted, and wait for a while, it can play the role of bonding.

It is a solid adhesive that is used after melting the adhesive by heating. General thermoplastic resins can be used, such as polyurethane, polystyrene, polyacrylate, ethylene-vinyl acetate copolymer, etc.

Solvent-based adhesives.

A binder that is insoluble in water but in a solvent. Such as shellac, butyl rubber, etc.

Emulsion-type adhesives.

It is mostly suspended in water, such as vinyl acetate resin, acrylic resin, chlorinated rubber, etc.

Solvent-free liquid adhesives.

At room temperature, it is a viscous liquid, such as epoxy resin.

The adhesive is the medium between the label material and the adhesive substrate, which acts as a link. According to its characteristics, it can be divided into two types: permanent and removable. It is available in a variety of formulations for different face materials and different occasions.

Adhesives are the most important ingredient in self-adhesive material technology and are the key to label application technology.

By raw material.

1 ms modified silane.

The end of the modified silane polymer is methoxysilane, which was invented in 1978 by Zhongyuan Group, the company is the world's only supplier of modified silane raw materials, on this basis, Belgium Novan Technology has produced a series of high-quality sealants and adhesives used in construction, industry, automobile transportation, civil and other applications through continuous research and development and innovation.

2 Polyurethane.

Polyurethane, the full name of polyurethane, is a general term for macromolecular compounds containing duplicate urethane groups on the backbone. It is made by the addition of organic diisocyanates or polyisocyanates with dihydroxyl or polyhydroxy compounds.

3 Silicone. Silicones (silicones), commonly known as silicone oil or dimethicone oil, molecular formula: (CH3)3SIO(CH3)2SIONSI(CH3)3, is a polymer of organosilicon oxide, is a series of polydimethylsiloxanes with different molecular weights, and the viscosity increases with the increase of molecular weight.

1. Adsorption theory.

The theory that the adsorption of solids to adhesives is regarded as the main cause of bonding is called the adsorption theory of bonding. It is theoretically believed that the main force of adhesion is the molecular force of the bonding system, that is, vandehua gravity and hydrogen bonding force.

The adhesion and adsorption of the adhesive and the surface of the adherent object have some of the same properties. There are two processes in the interaction process between adhesive molecules and the surface molecules of the adherent: the first stage is the diffusion of the liquid adhesive molecules to the surface of the adherent with the help of Brownian motion, so that the polar groups or chain links of the two interfaces are close to each other, in this process, the heating up, the application of contact pressure and the reduction of adhesive viscosity are conducive to the strengthening of Brownian motion.

The second stage is the generation of adsorption. When the distance between the adhesive and the adherent molecules reaches 10-5, the interfacial molecules will attract each other, so that the distance between the molecules will be further shortened to the maximum stable state.

2. Theory of chemical bond formation.

The chemical bond theory believes that in addition to the interaction force between the adhesive and the adherent molecule, sometimes there are chemical bonds, such as the adhesive interface between vulcanized rubber and copper-plated metal, the effect of coupling agent on glue bonding, and the adhesive interface between metal and rubber by isocyanate, all of which prove the formation of chemical bonds. The strength of the chemical bond is much higher than that of van der chemical forces; Chemical bond formation not only improves adhesion strength, but also overcomes the disadvantage of desorption that destroys bonded joints. However, the formation of chemical bonds is not ordinary, and certain quantized parts must be met to form chemical bonds, so it is impossible to make the contact points between the adhesive and the adherent object form chemical bonds.

Moreover, the number of chemical bonds per unit of adhesion interface is much smaller than the number of intermolecular interactions, so the adhesion strength is derived from intermolecular forces.

3. Weak boundary layer theory.

When the liquid adhesive does not penetrate well on the surface of the adherent, air bubbles remain in the void and form a weak zone. For example, when the impurities contained in it can be dissolved in the molten adhesive, but not in the cured adhesive, they will form another phase in the solidified adhesive, and a weak interface layer (WBL) will be formed between the adhesion and the adhesive as a whole. In addition to the process factors, the inhomogeneity of the boundary structure occurs in thermodynamic phenomena such as adhesive and surface adsorption in the molding process of polymer web forming or melt interaction.

The inhomogeneity of the interface layer will have WBL. The stress relaxation and crack development of this WBL will be different, which greatly affects the overall performance of the material and the product.

4. Diffusion theory.

Under the premise of compatibility, when they are in close contact with each other, the phenomenon of mutual diffusion occurs due to the Brownian motion of the molecules or the pendulum of the chain segments. This diffusion is carried out through the interface of the adhesive and the adherent. The result of diffusion leads to the disappearance of the interface and the creation of transition zones.

The adhesive system cannot explain the adhesion of polymer materials to metal, glass, or other hard bodies with the help of diffusion theory, because it is difficult for polymers to diffuse to such materials.

Bonding theory. 1. Mechanical theory The mechanical theory believes that the adhesive must penetrate into the void on the surface of the adherent object and remove the air adsorbed on its interface in order to produce the bonding effect. Mechanical embedding is an important factor when bonding porous substrates such as foam plastics.

The adhesive is better for bonding dense materials with surface grinding than dense materials with smooth surfaces, because (1) mechanical inlay; (2) forming a clean surface; (3) the generation of reactive surfaces; (4) Increased surface area. Since the surface does become rougher due to sanding, it can be assumed that the physical and chemical properties of the surface layer have changed, thus increasing the bond strength.

2. Adsorption theory Adsorption theory believes that bonding is caused by molecular contact and interfacial force between two materials. The main adhesion forces are intermolecular forces, including hydrogen bonding force and van der Waals force. The process of continuous contact between the adhesive and the adherent is called wetting, to make the adhesive wet the solid surface, the surface tension of the adhesive should be less than the critical surface tension of the solid, and the adhesive is immersed in the depressions and voids of the solid surface to form good wetting.

If the adhesive is hollowed out in the recess of the surface, the actual contact area between the adhesive and the adherent object is reduced, thus reducing the bond strength of the joint.

Many synthetic adhesives tend to wet metal substrates, and most solid adhesives have less surface tension than the adhesive. In fact, good wetting is achieved when the adhesive has a lower surface tension than the substrate, which is why epoxy adhesives are excellent for metal bonding, while untreated polymers such as polyethylene, polypropylene, and fluoroplastics are difficult to bond. The adhesive is in close contact with the adherent object through wetting, and the permanent bond is mainly produced by intermolecular forces.

There are four types of chemical bonds included in adhesion and cohesion.

1) Ionic bonds.

2) Covalent bonds.

3) Metal bonds.

4) Van der Waals.

3. Diffusion theory Diffusion theory believes that bonding is produced by molecular diffusion at the interface between the adhesive and the adherent. When both the adhesive and the adherent are long-chain macromolecular polymers that are able to move, diffusion theory is basically applicable. Solvent bonding and thermal welding of thermoplastics can be thought of as the result of molecular diffusion.

4. Electrostatic theory Electrostatic attraction is generated due to the formation of an electric double layer at the interface between the adhesive and the adherent, that is, the resistance to separate from each other. The presence of a significant electric charge when the adhesive is peeled off the adhesive is a strong confirmation of this theory.

5. Weak Boundary Layer Theory The weak boundary layer theory holds that when the bond failure is considered to be an interface failure, it is actually often a cohesive failure or a weak boundary layer failure. Weak boundary layers come from adhesives, adherents, the environment, or any combination of the three. If impurities are concentrated near the adhesive interface and are not firmly bonded to the adherent, a weak boundary layer can appear inside both the adhesive and the adherent.

When failure occurs, although it mostly occurs at the interface between the adhesive and the adherent, it is actually the failure of the weak boundary layer.

Summary. Application of adhesive: This product can be used for bonding plywood, wood board, fireproof board, aluminum-plastic board, MDF, iron, aluminum, plastic and other substances. It is widely used in automobiles, tractors, machinery and electrical appliances, furniture decoration, art advertising, footwear industry and other industries.

When using, the sticky substance will be wiped clean and dried, and then the glue will be evenly coated on the two glued surfaces that are wiped clean, and placed for about 10 min.

Characteristics of adhesive: this product has a simple and reasonable process and a wide range of uses; Good stability, no precipitation, easy to use; It does not contain harmful substances, does not pollute the environment, and is safe and reliable.

Homemade adhesives.

Hello, happy to answer your questions.

Self-made adhesive method: (1) EPS, organic solvents, plasticizers, coupling agents and rosin are added to the polymerization kettle in turn, and the reaction is about 2h after stirring, and the stirring is stopped, and the polymerized glue is out of the kettle, that is, the cherry blossom lifts the limbs to obtain component A. (2) Styrene-butadiene elastomer, mushroomene resin, petroleum resin, organic solvent and modified rosin resin were added to the human polymerization kettle in turn, and the reaction was 1

After about 5 h, after stopping the stirring, the glue was filtered to obtain component B. (3) The components in (1) and (2) are added together and pumped to the mixing tank by a vacuum pump, and the finished product is obtained after stirring and mixing and filtration.

Application of adhesive: This product can be used for bonding plywood, wood board, fireproof board, aluminum-plastic board, MDF, iron, aluminum, plastic and other substances. It is widely used in automobiles, tractors, machinery and electrical appliances, furniture decoration, art advertising, footwear industry and other industries.

When using, the sticky substance will be wiped clean and dried, and then the glue will be evenly coated on the two glued surfaces that are wiped clean, and placed for about 10 min. Characteristics of adhesives: the process of this Congxiang contains is simple and reasonable, and it has a wide range of uses; Good stability, no precipitation, easy to use; It does not contain harmful substances, does not pollute the environment, and is safe and reliable.

Summary. Hello pink adhesive production 350 parts of water to the starch, and add hydrochloric acid, heat, control the temperature to 71 3, maintain for 30min, until the solution is light yellow, and then add the corresponding color starch to debug.

Hello, the production of pink viscosity mixture is to add 350 parts of water to the starch, add hydrochloric acid, heat, control the temperature to 71 3, stare at the mountain and maintain for 30min, until the solution is light yellow, and then add the corresponding color starch to debug. Kai staring.

There is also a method: add 200 parts of water and 1 part of caustic soda in the reaction pot, stir evenly, and then gradually add corn starch under stirring, raise the temperature to 40, continue to stir for 30min, and then prepare the remaining caustic soda with 51 parts of water into a 10% solution, and then slowly add it to the reaction pot to make the starch slowly degraded. When the starch color withered eggplant turns colorless, add the corresponding color starch to debug, and then continue to stir for 20min, and then slowly add the remaining undetected water to roll as it can be.

How to use the adhesion promoter: wipe and disinfect with alcohol, where the car adhesion promoter is used, it must be kept in a dust-free state, otherwise it will affect the paste effect.

The method of using the adhesion aid is as follows: 1. Scrub the position where the adhesion aid is to be used thoroughly, and then wipe it with alcohol. 2. Dip a small amount of adhesion support with a brush and apply it to the place to be pasted.

3. Wait for two minutes before applying, and then press hard several times to let the adhesion booster exert greater viscosity. It should be noted that the adhesion promoter is volatile, so the cap should be closed quickly after application. Adhesion promoter is mainly used with adhesive tape, generally tape sticks to rubber, metal, plastic surface, its song is mainly used in car weatherstrips, weather shields, handles, rearview mirror covers, window trims, welcome pedals, mesh trim strips and other car modifications.

Adhesion promoter is a light brown transparent liquid that improves bonding properties and is an adhesive that is applied to the surface of the object before it is applied. Adhesion promoter can interact with water molecules in the air, can be sold in the wild to produce high adhesion, and has the ability to resist high temperatures, especially when used with acrylic foam tape, can have an excellent bonding effect. Adhesion promoter features:

Speed up the initial adhesion of the tape and improve the adhesive strength. Lost round.

1.Wipe with alcohol.

When using adhesion aids, it is important to keep them dust-free, so scrub the area where you are going to use the adhesion aid thoroughly, and then wipe it with alcohol to keep it dry and clean before using the adhesion aid.

2.Dip in the appropriate adhesion promoter.

The adhesion aid is not glue, you don't need to use it so much at one time, as long as you open the cap of the bottle with its own brush, use the brush to dip a small amount of adhesion aid, remember to close the cap casually, otherwise it is easy to volatilize.

3.Brush with adhesion support.

Apply a small brush with the adhesive to the area where you want to apply, don't rush to put it on at this time, wait two minutes before applying, and then press hard a few times to let the adhesive develop more stickiness.

4.Precautions for adhesion promoters.

Children must stay away from adhesion aids, if they accidentally touch ** and eyes, immediately go to the faucet to wash carefully. In addition, when using it, the adhesion aid should not be applied to the car, but applied to the tape.