RU2730290C1 - Covering packing material - Google Patents

Abstract

FIELD: package and storage.

SUBSTANCE: cover packing material represents relief sheet made of moulded fibrous materials by waste paper disintegration in a hydraulic pulper using recycled water at concentration of 4–5 %. Loose paper mass is fed into accumulating tank, pump is fed to cleaner of high concentration of mass to remove heavy contaminants and then to turbo separator, where there is cleaning from light inclusions and fine sand. Cleaned mass of fibrous materials is diluted with recycled water till concentration is equal to 1.0–1.2 % and supplied to the vacuum forming machine to form a relief sheet and to compact the layer of fibres to dryness of 25–30 %. Then, the sheet is dried by passing through a drying tunnel to produce the target product.

EFFECT: material has high mechanical strength.

3 cl

Description

The invention relates to cover packaging materials intended for leaky packaging of various products and can be used for wrapping various bulky items, in particular furniture or industrial equipment, as well as fixing the location of fragile items in the package, in particular glass or ceramics.

Known (RU, patent 2180312, publ. 03/10/2002) laminated packaging material, which is simultaneously a biaxially stretched film, consisting of at least two layers connected with adhesive, one of which is made of polyethylene, and the second is made of polypropylene ... The packaging material is obtained by simultaneous biaxial stretching of the film, during which it is clamped by at least one layer of polymer, the melting point of which is higher, heated to a temperature close to the melting point of the specified layer, stretched, thus transferring the tensile force through adhesive to another layer, thermosetting glue is used as the adhesive, and before stretching the film is kept to such a state of the glue when its structuring is not complete, and the viscosity is 120-600 kPa · s.

The specified packaging material is mainly intended for sealed food packaging.

Its disadvantage is complexity: manufacturing technology.

It is also known (RU, patent 84825, publ. 20.07.2009) reinforced polymeric packaging web containing a half-sleeve made of film, cut from one side along the entire length, or at least two layers of film, connected or connected to each other, to form cells in which the reinforcement is installed, the reinforcement being provided with a shock absorbing element on at least one side.

Known polymeric reinforced packaging web can be used for packaging various types of products in various industries, such as construction, cable or others.

The disadvantage of the known packaging web can be recognized as the complexity of the technology.

Known (DE, application 4421675, publ. 04.01.1996) laminated packaging material, which is a multilayer simultaneously biaxially stretched film, consisting of layers connected by an adhesive. The stretch area ranges from 1 in 49 to 1 in 64.

However, this application does not describe the manufacturing technology of the specified packaging material.

Known (RU, patent 2598442, publ. 09/27/2016) flexible packaging material made of plastic material for packaging dry food, such as cereal products, wherein said plastic material is a single-stage web of a multilayer film, including at least a high moisture impermeability layer made of high density polyethylene (HDPE), an oxygen impermeable layer allowing some predetermined oxygen permeability and made from an extruded blend of amorphous polyethylene terephthalate (PETG) and a polyethylene based polymer (PE) so that it has oxygen permeability of 400 cm ³ / m ² / day or higher when measured at a temperature of 23 ° C and a relative humidity of 0%, as well as a peelable sealing layer, and the specified oxygen impermeable layer contains an extruded mixture comprising less than 85 wt. % PETG, with the remainder of the blend being a polyethylene-based (PE) polymer.

The disadvantage of the known packaging material is the complexity of the design, as well as the narrow field of application.

Also known (RU, patent 2678868, publ. 02/04/2019) is a material for vacuum packaging, which is a broadband three-layer material, the first outer layer of which is made of pre-metallized lavsan, the second is made of foil, and the third inner layer is made of polyethylene.

The known material is intended for transportation, conservation and long-term storage of various objects of technology, electronics, devices and materials.

Its disadvantage is the complexity of the manufacturing technology.

The closest analogue of the developed packaging material can be recognized (https://oplenke.ru/vse-o-vozdushno-puzyrkovoj-plenke/) a three-layer air-bubble film, consisting of a layer of bubbles placed between two layers of smooth polyethylene. Thanks to its bubble structure for shock-absorbing properties, the film provides impact protection.

It protects against scratches and is flexible.

The disadvantage of this packaging film is the complexity of the technology, high cost and the resulting limited use - the predominant use for packaging expensive oversized products.

The technical problem solved by the developed packaging material is to expand the range of packaging materials for a wide range of applications.

The technical result achieved by the implementation of the developed material consists in greater mechanical strength, biodegradability, reduction of the carbon footprint, use of secondary raw materials as a starting material.

To achieve the specified technical result, it is proposed to use a cover packing material, which is a relief sheet made of molded fibrous materials (pulper cardboard), has a bursting resistance index of 2.0 kgf / cm ² .

The relief can be made in the form of hemispherical depressions or in the form of a truncated cone. This list does not limit the options for performing the relief.

The technology for producing cover packaging material from molded fibrous materials is identical to the technology for producing products from waste paper by vacuum forming.

According to a previously developed technology, the process of obtaining the original paper pulp from waste paper takes place, possibly with the addition of wood flour in an amount not exceeding 10% of the raw material mass. Dissolution of waste paper takes place in a pulper using recycled water at a concentration of 4-5%. Then, the loose stock is fed into a storage container. From where, a high concentration mass is pumped to the cleaner to remove heavy contaminants (glass, stones, etc.) and then to the turbo separator, where light impurities (films, foil, etc.) and fine sand are cleaned. The cleaned mass of fibrous materials enters the pool of the cleaned mass, from where it goes to the mixing pump. Here, the concentration of paper pulp is diluted with circulating water to a concentration of 1.0-1.2% and then by a pump, the mass of fibrous materials is fed into the pool of finished pulp, from where it is pumped to a vacuum forming machine. The process of forming a film from a mass of fibrous materials on a vacuum - forming machine is a vacuum deposition of the prepared mass on a form - a grid having the configuration of a finished product. Under the influence of vacuum on the mold, the fiber layer is dehydrated and compacted to a dryness of 25-30%. With this dryness, the molded article has sufficient strength to maintain its geometric dimensions during its transfer from the mold to the conveyor and subsequent drying. The formed paper products pass through a drying tunnel, the duration of the drying process of the formed film is 15 minutes, at a temperature of 130 ° C.

The developed covering packaging material can be used both for wrapping the protected product and for placing between the walls of the solid container and the protected product. Example # 1:

The IKEA company packed the rack with the developed covering packaging material for delivery to the buyer, during its transportation the corner of the wall was touched, the packed goods were not damaged.

Example # 2:

The sold vase was packed in a box by IKEA. The vase was additionally wrapped in a developed cover material. During transportation, the packed vase was dropped from a height of 1 meter, the packed goods were not damaged.

When using a cover-packing material with a lower value of the bursting resistance index on contact with hard surfaces in the form of corners, the material breaks down, allowing damage to the packaged item.

Claims (3)

1. Covering packaging material, characterized in that it is an embossed sheet made of molded fibrous materials by dissolving waste paper in a pulper using circulating water at a concentration of 4-5%, the loose paper pulp is fed into a storage tank, pumped to a pulp cleaner high concentration to remove heavy impurities and then to the turbo separator, where light impurities and fine sand are removed, the purified mass of fibrous materials is diluted with circulating water to a concentration of 1.0-1.2% and fed to a vacuum forming machine to form a relief sheet and compaction of the fiber layer to a dryness of 25-30%, then the sheet is dried by passing through a drying tunnel to obtain the target product. 2. The material according to claim 1, characterized in that the relief is made in the form of hemispherical recesses. 3. The material according to claim 1, characterized in that the relief is made in the form of recesses in the form of a truncated cone.