CN102991074A - Thin film and production method thereof - Google Patents

Abstract

The invention relates to a thin film. The thin film comprises, by weight, 30% of an outer layer, 40% of a middle layer and 30% of an inner layer. The invention further provides a production method of the thin film. The production method includes the following steps of material mixing, batching and film blowing. The thin film has the advantages that the surface evenness is high, electric corona and composition are easy, and the continuous production can be achieved through a film blowing machine by combining batching equipment.

Description

A kind of film and production method thereof

Technical field

The present invention relates to the film production manufacture field, specifically a kind of film and production method thereof.

Background technology

Blown film (BlowMembrane) is a kind of plastic working method, refers to the plastic pellet heating and melting is blown out again a kind of plastic processing of film.If the film that blows out with virgin material, color and luster is even, and clean, finished product stretches.If the plastic pellet with the waste plastics that reclaims is made will add pigment usually when making film, the film of making may be just painted irregular, crisp and easily broken, and price is also lower.Blown film material by the inflation film manufacturing machine production of specialty is applicable to various high-grade blister-packs.This film is owing to its good barrier property, and is fresh-keeping, damp proof, frost protection, and oxygen barrier, oil resistant can be widely used in the weight packing.Such as various fresh fruits, meat product, pickles, fresh milk, liquid beverage, medical supplies etc.If non-professional inflation film manufacturing machine or inflation film manufacturing machine do not make on sound lines in process, the coating materials of making so also may be substandard products.Most of PE are used for the blown film film processed, and general low density PE (LDPE) or linear low close PE (LLDPE) are available.The HDPE film-grade generally is used for requiring the place of superior draftability and fabulous barrier properties.For example, the HDPE film is usually used in commodity bag, groceries bag and food Package.The PE processing film is generally with common blown film processing or the flat processing method of squeezing.

Because the scope that film is used is different, the characteristic of requirement has very large difference, on some film that need to print, need surface smoothness high, easily corona is easily compound, does not also have a kind of easy volume production, surface smoothness high, easily corona, easy compound film at present.

Summary of the invention

The present invention is above technical problem just, provides a kind of easy volume production, surface smoothness high, easily corona, easy compound film.

The present invention is achieved through the following technical solutions:

A kind of film, comprise skin, middle level, internal layer three parts, the each several part proportion of composing is (percentage by weight): outer 30%, middle level 40%, internal layer 30%, its ectomesoderm is comprised of LDPE2420H, LLDPE920NT, and each component ratio accounts for 30%-40% for (percentage by weight): LDPE2420H accounts for 60%-70%, LLDPE920NT; The middle level also is comprised of LDPE2420H, LLDPE920NT, and each component ratio accounts for 60%-70% for (percentage by weight): LDPE2420H accounts for 30%-40%, LLDPE920NT; Internal layer is comprised of LDPE2426H, MDPE5401, LLDPE218W, LLDPE920NT, and each component ratio accounts for for (percentage by weight): LDPE2426H accounts for 20%-30%, MDPE5401 that 20%-30%, LLDPE218W account for 20%-30%, LLDPE920NT accounts for 20%-30%.

A kind of production method of film may further comprise the steps:

Step 1, batch mixing stir each raw material to scale by the percentage by weight of skin, middle level, each component of internal layer and to make former mixed materials for later use;

Step 2, batching are prepared burden the former mixed material of step 1 preparation by the percentage by weight of skin, middle level, internal layer;

Step 3, blown film adopt the film that the inflation film manufacturing machine blow molding of being furnished with Automatic batching equipment is produced to be needed.

Film provided by the invention has surface smoothness height, easily corona, easy compound characteristics, and can in conjunction with dispensing equipment, realize continuously production by inflation film manufacturing machine.

The specific embodiment

The present invention will be further described below in conjunction with specific embodiment.

At first, by weight percentage with 65% LDPE2420H, 35% LLDPE920NT stirs and makes outer former mixed material, by weight percentage with 35% LDPE2420H, 65% LLDPE920NT stirs and makes the former mixed material in middle level, by weight percentage with 25% LDPE2426H, 25% MDPE5401,25% LLDPE218W, 25% LLDPE920NT stirs and makes the former mixed material of internal layer, by weight percentage then with the former mixed material of skin, the former mixed material in middle level, the former mixed material of internal layer is by outer 30%, middle level 40%, internal layer 30% is prepared burden, after batching is finished, can adopt the film that the inflation film manufacturing machine blow molding of being furnished with Automatic batching equipment is produced to be needed.

Film provided by the invention has surface smoothness height, easily corona, easy compound characteristics, and can in conjunction with dispensing equipment, realize continuously production by inflation film manufacturing machine.

Claims (2)

1. film, comprise skin, middle level, internal layer three parts, the each several part proportion of composing is (percentage by weight): outer 30%, middle level 40%, internal layer 30%, its ectomesoderm is comprised of LDPE2420H, LLDPE920NT, and each component ratio accounts for 30%-40% for (percentage by weight): LDPE2420H accounts for 60%-70%, LLDPE920NT; The middle level also is comprised of LDPE2420H, LLDPE920NT, and each component ratio accounts for 60%-70% for (percentage by weight): LDPE2420H accounts for 30%-40%, LLDPE920NT; Internal layer is comprised of LDPE2426H, MDPE5401, LLDPE218W, LLDPE920NT, and each component ratio accounts for for (percentage by weight): LDPE2426H accounts for 20%-30%, MDPE5401 that 20%-30%, LLDPE218W account for 20%-30%, LLDPE920NT accounts for 20%-30%.

2. the production method of a film may further comprise the steps:

Step 1, batch mixing stir each raw material to scale by the percentage by weight of skin, middle level, each component of internal layer and to make former mixed materials for later use;

Step 2, batching are prepared burden the former mixed material of step 1 preparation by the percentage by weight of skin, middle level, internal layer;

Step 3, blown film adopt the film that the inflation film manufacturing machine blow molding of being furnished with Automatic batching equipment is produced to be needed.