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FAQ

How is the blow up ratio of a plastic film calculated? What's its formula?

The ratio of film diameter to die diameter in blown film.

How are membranes classified?

HDPE film. HDPE film is a kind of tough semi transparent film. Its appearance is milky and its surface glossiness is poor. The tensile strength, moisture resistance, heat resistance, oil resistance and chemical stability of HDPE films are better than those of LDPE films, and they can also be sealed by heat. But the transparency is less than that of LDPE. HDPE can be made into thin film with thickness of 0.01. L. Its appearance is similar to that of thin silk paper. It feels comfortable and is called "paper film". It has good strength, toughness and opening, and can be added with a small amount of light calcium carbonate to enhance the paper feel and reduce the cost. HDPE paper film is mainly used for making all kinds of shopping bags, garbage bags, fruit packing bags and all kinds of food packaging bags and so on. Because of its poor air tightness and no incense retention, the storage period of packaged food is not long. In addition, the HDPE film can be used as a heat sealing layer of the cooking bag because of its good heat resistance.

Plastic film ink adhesion is not good, how should I do?

Compared with the two kinds of methods, corona treatment, low cost, poor stability, but the treatment effect, the corona treatment effect will gradually decrease with time, especially when the storage film material in a high humidity environment when corona treatment effect decreased faster. Therefore, in order to achieve good printing effect, on-line corona treatment of corona treated film material is recommended in actual printing process. Although the cost of coating treatment is higher, the treatment effect is stable, and the surface tension is not affected by time.

Do you want to remove the wrapping plastic film from the new mattress?

Restoring the inherent elasticity and comfort of the mattress. There is a bed on the mattress. The sheets are very sanitary. It is not necessary to keep the plastic film in it.

What happens when the friction coefficient of PE plastic film becomes larger?

The film base itself smoothness bad; not with extrusion composite slip agent, sticky film extrusion PE, the friction coefficient is larger;

How can the weathering of the plastic film on the surface of FRP be removed?

Oxidation process. With strong oxidant rinse solution (such as the Potassium Permanganate solution), the wax plastic film surface cleaning. The polar group is introduced to oxidize and break the molecular chains of the surface layer of the plastic film, to form micropores and to increase the roughness of the surface. The treatment method does not need special equipment, is easy to operate, has low cost, good effect and stable treatment. However, due to the long processing time, after the treatment has to be washed and dried, low efficiency and environmental pollution, so rarely used this method to deal with plastic film in large quantities.

Plastic film has eyes, how to make up?

This method is suitable for greenhouses. Remove the damaged area first. According to the damaged area, cut a little larger than the broken film, and then stained with water, or use the natural water on the greenhouse, the film between the air row, the two film flat, hard to squeeze water beads.

Is the foundation covered with film or damp proof powder?

1, I do not know what is the principle of moistureproof powder?. It is estimated that it is additive. But not added to mortar, doubt the function.2, the film will be better, but the follow-up construction is easy to damage, durability is limited, it is better to do a waterproof.3, on the foundation moistureproof, equal to did not do. It is no use crossing a block of water in the middle of the pool. Damp proof should be done below ground level.4, I don't think the film is better than the traditional damp proof layer. Can the height on the ground, construction (brick), can play a role of natural moisture barrier; or on the ground part of the wall construction waterproof isolation layer.