The artifact of brightening plastic products

As we all know, PE plastic is soft and feels like wax. Compared with other plastics, it is lighter and has certain transparency, so it is often used to make PE plastic blow film products. The common fresh-keeping film, vest type plastic bag, plastic food bag, product packaging, greenhouse film, calendering tape for packaging, ligation tape, rope and cable, fishing net, braiding fiber, wire and cable are all PE blown film products. Today, Shanghai enmai Xiaobian will talk with you about how to improve the whiteness and transparency of PE blown film.

 

For the current market, with the increasing pressure of environmental protection, the business of plastic industry is more and more difficult to do. In order to reduce production costs, most plastic manufacturers will choose recycled materials to produce PE blown film. But the PE blown film made of recycled materials is always unsatisfactory in appearance, so some additives are usually added to improve it. Fluorescent brightener, as an additive in blown film products, plays an important role.

 

What conditions should whitening agent for film blowing meet?

 

Film blowing is a kind of plastic processing method, which is a kind of plastic processing technology that the PE plastic particles are heated and melted, and then blown into a film. Usually, the polymer is extruded into a tubular film blank, and the tube film is blown to the required thickness through high-pressure air under a better melt flow state, and then the film is formed after cooling and shaping. PE blown plastic has high requirements for whiteness, brightness, transparency, solubility and weatherability. Let's take greenhouse film as an example. PE blown plastic used for mulching film and greenhouse film needs a film with good whiteness and transparency, so that it can quickly raise the temperature in the greenhouse during the day and promote the rapid growth of vegetables. If the transparency of PE film itself is not enough, or if it is used for a short time, it will appear yellowing and discoloration, and the transparency will decrease, which will weaken the sunlight and lead to the decline of vegetable production.

 

Which type of fluorescent whitening agent is suitable for film blowing?

 

Not all fluorescent brighteners are suitable for PE blown plastic. Shanghai enmai suggests that you use fluorescent brightener ob. The whiteness, transparency, solubility and weather resistance of Fluorescent Whitening Agent OB are better than other whitening agents, especially suitable for blown film products (also suitable for whitening of PVC, PP, PS, ABS, PMMA, POM and other thermoplastic plastics, thermosetting plastics, polyester fiber and other products). The use of this product can greatly improve the whiteness, brightness and brightness of blown film products, and make blown film bright as new.

 

Usage and dosage of OB fluorescent whitening agent: evenly dissolve and disperse in the product or solvent, with the addition amount of 1 / 10000 to 5 (that is, 10-50g per 100kg raw material).