"Non-stick pan" is a very common pot in the kitchen, because in the process of using less oil consumption, less smoke, but also not easy to paste the problem, so it is welcomed by many people. In recent years, however, there have been more and more controversies about non-stick pans: Some people think that non-stick coating will produce toxic substances, can not be used for a long time; Some people feel that the use of non-stick pan is very convenient, and use for so long, also did not find the body appears any discomfort symptoms. So is nonstick coating really toxic? Can the nonstick pan at home still be used? Today we'll have a look too. The reason why the non-stick pan is not stick The non-stick pan we use is able to do non-stick, the main reason is the coating material on the surface of the pan. The surface of non-stick pot will use a special coating, this coating has good lubrication performance, and the coefficient of friction is very small, the surface tension is very small, so as to ensure that the non-stick pot in the process of use will not easily adhere to the substance, so it can achieve the effect of non-stick. The reason why we are willing to choose to use a non-stick pan is because of the characteristics of non-stick. It is not easy to paste the pan when frying dishes. Even when frying steak or eggs, it is also very convenient to put a little oil and not to stick to the pan. Is the coating of nonstick pans really toxic? As we all know, the most important thing about nonstick wok is the coating material used on its surface, but at the same time, the coating material is also the controversy of nonstick wok. Some people think that the coating used on the surface of non-stick pans will produce harmful substances. If these usually enter the food, it may even lead to poisoning and other symptoms, which will pose a great threat to our health. So what is the material of the coating of the nonstick pan? Teflon is the main substance of the coating material used in nonstick pans. The Teflon material does break down a little bit with the temperature, and the products that do break down, they have some toxicity. So is the coating of nonstick pans really bad for us? You don't have to worry too much about this. Although the Teflon coating in the nonstick pan will decompose, but the harm to the human body is very small, under normal circumstances, you can rest assured to use the nonstick pan. The Teflon in the nonstick coating doesn't start to break down until the temperature reaches 300 degrees Celsius. Experiments have shown that when the temperature reaches the decomposition temperature of Teflon, the decomposition will be carried out, but due to different temperature changes, the decomposed products will be different and the final toxicity will be different. In our normal cooking process, the temperature inside the nonstick pan rarely reaches 300 degrees Celsius, which means it does not reach the temperature of Teflon decomposition, and does n...

1.Excellent adhesion The polymer structure of water-based acrylic emulsion contributes to the flow and wettability of molecular chains on the substrate surface, making the coating and substrate molecules in close contact, to achieve high adhesion. 2.High load-bearing capacity of the makeup filler can significantly reduce the cost Waterborne acrylic emulsion has excellent fillability, the total solid content of the coating formula can reach 60%. Among them, the ratio of resin to filler can reach 1:2, which significantly reduces the formulation and use cost of waterborne wood lacquer. 3.Zero VOC safety and environmental protection Water-based acrylic emulsion itself does not contain VOC, and can be formed at room temperature without film forming agent. Paints formulated in this way can have zero VOC content. 4.Excellent water resistance Aqueous acrylic emulsion does not contain ordinary acrylic emulsion used surfactants, and has a special design of hydrophobic groups. Therefore, water-based acrylic emulsion has excellent moisture resistance, which can prevent the penetration of water molecules to the substrate after the film is dried, so as to achieve the effect of waterproof and moisture-proof. 5.Excellent weather resistance The molecular structure of water-based acrylic emulsion adopts UV-stabilized monomer structure, and the emulsion is specially designed, which can make TIO2 fully evenly dispersed in the emulsion, reduce the influence of UV on the emulsion, and effectively protect the substrate. 6.Excellent pigment dispersion Water-based acrylic emulsion and a variety of water-based color paste compatibility is good, so that the function of fillers and pigments get the maximum play, paint color bright.

With the continuous enhancement of human environmental awareness, environmental protection laws and regulations are also being introduced and improved. All industries are working together in the direction of environmental protection, green, healthy.With the development of flexible packaging industry, it has become an inevitable trend to reduce and remove the organic solvents used in the compound.Water-based composite adhesive in the use of methods and price technology and other aspects are gradually mature, become the new darling of the soft bag industry, has achieved rapid development at home and abroad. In plastic composite and plastic aluminum composite, water - based polyurethane and acrylic polymers are mainly used. Water-based adhesive mainly has the following (1)High composite strength. The molecular weight of water-based adhesive is large, which is dozens of times that of polyurethane adhesive. Its bonding force is mainly based on van der Waals force, which belongs to physical adsorption, so a very small amount of adhesive can achieve quite high composite strength. (2)soft, more suitable for the compound of aluminum plating film. One-component water-based adhesives are softer than two-component polyurethane adhesives. When they fully set, polyurethane adhesives are very rigid, while water-based adhesives are very soft. Therefore, the soft properties and elasticity of water-based adhesive are more suitable for the composite of aluminum plating film, which does not easily lead to the transfer of aluminum plating film. (3)No need to mature, off the machine can be sliced. Single component water-based adhesive compound does not need curing, after off the machine can be splayed, bag making and other subsequent processes. This is because of the high initial adhesive strength, especially shear strength, to ensure that the product in the composite and cutting process will not produce "tunnel", fold and other problems. Moreover, the use of water-based adhesive composite film in 4 hours after placement, strength can improve by 50%. Here is not the concept of maturation, the colloid itself did not occur crosslinking, mainly with the leveling of the glue, composite strength also improved. (4)Thin adhesive layer, good transparency. Due to the small amount of water-based adhesive, and the concentration of adhesive is higher than that of solvent-based adhesive, so the need for drying and discharge of water is far less than solvent-based adhesive. After the moisture is completely dried, the film will become very transparent, because the adhesive layer is thinner, so the transparency of the composite is better than that of the solvent adhesive. (5)Environmental protection, harmless to people. There is no solvent residue after drying of water-based adhesive, many manufacturers use water-based adhesive to avoid residual solvent compound, so the use of water-based adhesive production safety, no damage to the health of the operator staff. With the increasing s...

After the composite product has been cured at a certain temperature and time, the interlayer peeling composite film adhesive layer still has a certain viscosity, that is, after the composite film peeling, the two-layer film will be re-glued together by hand, and the severe drying of the composite film adhesive layer will directly affect the peeling strength of the composite film, while the slight non drying phenomenon will lead to poor heat sealing strength after bagging, and the viscosity after the interlayer peeling. Heat sealing place is easy to wrinkle phenomenon, but storage a week or half a month later, packaging bag wrinkle phenomenon, this phenomenon, caused by the loss is often larger. Causes of non -drying composite film 1.The ratio provided by the glue manufacturer is not accurate, the proportion of curing agent is too small or the ratio of mixing glue liquid is misadjusted, and the curing agent is too little or ineffective. 2.In addition to dilute the solvent water or small molecular alcohol content is too high consumption of curing agent 3.Film moisture absorption, especially NY and cellophane, it is easy to appear not dry phenomenon. 4.The use of ink containing alcohol solvent does not volatilize completely resulting in the glue layer is not dry. 5.The use of polyurethane, polyester ink without hardening agent caused by the glue layer is not dry phenomenon. 6.The ambient temperature and humidity are too high, the prepared adhesive is placed for too long, resulting in the curing agent and water reaction for a long time. 7.Containing K coating PET film composite machine PET film additive influence. Corresponding solution 1.Generally speaking, the ratio provided by adhesive manufacturers is a reasonable ratio obtained through a large number of tests by adhesive manufacturers. Therefore, the ratio will not be inaccurate. If indeed because of the quality of the adhesive itself must be replaced by the adhesive; 2.Reduce the total content of water and alcohol in ethyl acetate (replace good quality ethyl acetate, the total content of water and alcohol is less than 0.2%); 3.When the composite moisture absorption NY and cellophane film adjust to improve the proportion of curing agent (5% ~ 10%), at the same time do not use damp film; 4.As far as possible to reduce the amount of residual solvent in printing ink; 5.The use of polyurethane ink: the first is to solve the composition of polyurethane ink dilution solvent, try to do not use alcohol dilution solvent. If alcohol diluent must be used when printing, it should also be done in printing to minimize the residual solvent; Secondly, if there is a printing film with white ink, finally, a small amount of hardener is added to white ink, which can increase the compound fastness. But added hardener ink use period is shorter, if there is surplus, and the interval time is longer in principle should not be used again. Finally, the purity of ethyl acetate used for preparing adhesive dilution should be...