Q:When will the plastic film be opened when the vegetables are sprouting?

Plastic films are made of polyvinyl chloride, polyethylene, polypropylene, polystyrene and other resins. The surface tension of the plastic film depends on the free energy of the surface of the plastic film, and the surface energy of the film depends on the molecular structure of the film itself. Plastic film can be used in food packaging, electrical product packaging, daily necessities packaging, clothing packaging, etc..

Q:What's the plastic film on the disposable paper cup?

At present, the domestic use of disposable cups can be divided into three types: cold, hot drinks and ice cream cup cup cup; according to the use of paper cups, the coating is also divided into three kinds, one is the wax cup, and a cup of polyethylene film and straight wall double cup.

Q:What is concrete plastic sheeting for moisture conservation?

Film curing agent maintenance: in the new pouring concrete surface coated with a layer of liquid film curing agent (also called film solution), curing agent on the surface of the concrete to seal a layer of impermeable film formed quickly, prevent water evaporation in concrete, a maintenance method in concrete water mud fully water condition.

Q:What are the appliances for drawing plastic films?

The tensile strength is divided into longitudinal and transverse directions. Plastic film material in a certain direction, through the tensile fixture test speed, tensile until fracture, showing the carrying capacity.

Q: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.

Q:Can ultraviolet light penetrate transparent plastic film?

Plastics do not pass through ultraviolet light, but they promote the absorption of calcium, as if in the sun's ultraviolet rays. However, there will still be UV tents, it should also have effect

Q:What are the factors affecting the puncture strength of plastic film?

The specific operation is as follows: the diameter of test piece 100mm is installed on the fixed clamping ring like membrane, with a diameter of 1.0mm spherical apex radius of 0.5mm needle, thorn to the top with the speed of 50mm/min, the maximum load test piece read needle penetration. I hope I can help you.

Q:How to detect the surface tension of plastic film?

Use a pen and a ballpoint pen to draw lines or write on the surface of the film, and judge whether the lines drawn by ink or ballpoint pens are continuous. Lines can be printed continuously, otherwise they are not processed enough.

Q:What are the kinds of plastic films?

Low density polyethylene film, such as plastic film, greenhouse film, plastic film, plastic film, food bag;

Q:What solvent can be used to remove the plastic film glued to the glass?

You can remove nitro thinner scrub.Nitro thinner is used in automobile paint lacquer, the car paint, and then use the nitro thinner cleaning spray gun. The diluent is allergic to the skin, after evaporation, skin itching feeling, also feel hot.