Flattening method for nylon film processing semi-finished product

Abstract

The invention relates to the technical field of nylon film processing, in particular to a flattening method for a nylon film processing semi-finished product, which is simple in process, enables a stretched film to retract in liquid, improves the deformation uniformity of the film and prevents wrinkles. The method comprises the following steps that S1, a containing box is installed at an outlet of a stretching box, the interior of the containing box is hollow, the top of the containing box is open, liquid which is low in toxicity or free of toxicity, low in viscosity, not prone to volatilization and free of water is added into the containing box, N lower rollers are installed in a lower half area of the interior of the containing box and located in the liquid, N+1 upper rollers are installed in an upper half area of the containing box, and a height lifting section is arranged at a film outlet of the containing box; S2, N-1 partition plates are arranged at the inner bottom of the containing box, and the interior of the containing box is divided into N areas; and S3, the film from the stretching box passes through the N+1 upper rollers and the N lower rollers in an S shape, the liquid on the surface of a nylon film is removed by means of the height lifting section, and then the next procedure is conducted.

Description

technical field [0001] The invention relates to the technical field of nylon film processing, in particular to a flattening method for processing semi-finished products of nylon film. Background technique [0002] Nylon film is a very tough film with good transparency, good gloss, high tensile strength and tensile strength, and good heat resistance, cold resistance, oil resistance and organic solvent resistance. Excellent wear resistance and puncture resistance, relatively soft, excellent oxygen resistance, but poor barrier property to water vapor, high moisture absorption and moisture permeability, poor heat sealing performance, suitable for packaging hard items, such as greasy Sexual food, meat products, fried food, vacuum-packed food, steamed food, etc. [0003] In the production of polymer films, biaxial stretching or uniaxial stretching is required. Due to the high stretching temperature, it is necessary to cool down after leaving the stretching box. When cooling down,...

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Problems solved by technology

[0002] Nylon film is a very tough film with good transparency, good gloss, high tensile strength and tensile strength, and good heat resistance, cold resistance, oil resistance and organic solvent resistance. Excellent wear resistance and puncture resistance, relatively soft, excellent oxygen resistance, but poor barrier property to water vapor, high moisture absorption and moisture permeability, poor heat sealing performance, suitable for packaging hard items, such as greasy Sexual food, meat products, fried food, vacuum-packed food, steamed food, etc.

[0003] In the production of polymer films, biaxial stretching or uniaxial stretching is required. Due to the high stretching temperature, it is necessary to cool down after leaving the stretching box. When cooling down, the thickness of the film is uneven, the temperature is uneven, and the equipment itself Any defect will cause wrinkles on the surface of the film. In the prior art, mechanical and pneumatic methods are mostly used. The pneumatic type relies on the directional airflow acting on the film to flatten the wrinkles. Although this method can avoid damage to the film Surface, but can not get a flat film after flattening the folds; and the mechanical method is easy to cause excessive stretching of the film, causing damage to the film; therefore, it is necessary to study a method of flattening and finishing the semi-finished nylon film to solve the above problems

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