Packaging product and processing technology thereof

Abstract

The invention discloses a packaging product and a processing technology thereof. The packaging product comprises a paper layer, a thin film layer and a cloud silk non-woven fabric which are sequentially compounded from inside to outside, the thin film layer is adhered to the outer surface of the paper layer through a spraying process and comprises a base material film, an aluminum layer arranged on one side of the base material film and a color coating layer arranged on the other side of the base material film; the cloud silk non-woven fabric is adhered to the outer side of the colored coating of the thin film layer through a spraying process, and the base material film is made of at least one of PET and OPP; when PET is adopted to form a high-brightness film, OPP is adopted to form a matte film, and a packaging product is produced through a secondary spraying and coating process, in the production process of the packaging product, by controlling the temperature, the uniformity of all composite layers of a finally produced packaging bag can be effectively improved, the paper layer, the thin film layer and the cloud silk non-woven fabric are not prone to being separated, and the packaging effect is good. Meanwhile, the packaging bag is high in mechanical strength and has the functions of skid resistance, scratch resistance, water resistance, moisture resistance and radiation resistance.

Description

Technical Field

[0001] The present invention relates to the technical field of packaging products, and specifically relates to a packaging product and its processing technology. Background Art

[0002] Packaging products refer to the general term for various materials and containers used to protect, contain, decorate, transport or display products. They play an important role in the processes of commodity production, circulation, sales and use, and are widely used in industries such as food, beverage, medicine, daily chemical, electronics, logistics, etc.

[0003] At present, packaging products such as packaging bags and packaging boxes in use, most of the packaging bags are mainly made of a single material (such as plastic films like PE, PP or paper-based materials), having problems of insufficient mechanical strength and poor barrier properties. For the remaining composite packaging bags, the various composite layers are mainly fixed and connected by gluing. When the packaging bags are used multiple times, the composite layers of the packaging bags are prone to delamination, thereby affecting the practicality of the packaging bags.

[0004] Therefore, in view of this, research and improvement are carried out on the existing structure, and a packaging product and its processing technology are provided, in order to achieve a more practical value purpose. Summary of the Invention

[0005] The purpose of the present invention is to provide a packaging product and its processing technology to solve the problems raised in the above background art, that is, for packaging products such as packaging bags and packaging boxes in use, most of the packaging bags are mainly made of a single material (such as plastic films like PE, PP or paper-based materials), having problems of insufficient mechanical strength and poor barrier properties. For the remaining composite packaging bags, the various composite layers are mainly fixed and connected by gluing. When the packaging bags are used multiple times, the composite layers of the packaging bags are prone to delamination, thereby affecting the practicality of the packaging bags.

[0006] To achieve the above purpose, the present invention provides the following technical solution: A packaging product and its processing technology, including a paper layer, a film layer and a cloud silk non-woven fabric that are sequentially laminated from the inside to the outside;

[0007] The film layer is adhered to the outer surface of the paper layer through a lamination process, and it includes a base film, an aluminum layer provided on one side of the base film and a color coating on the other side;

[0008] The cloud silk non-woven fabric is adhered to the outside of the color coating of the film layer through a lamination process.

[0009] Preferably, the base film is at least one material of PET, OPP; when PET is used, a high-brightness film is formed, and when OPP is used, a matte film is formed.

[0010] Preferably, the mass of the film layer is 15 - 20 g / m2 , the mass of the cloud silk non-woven fabric accounts for 30% - 40% of the total mass of the packaging product.

[0011] Preferably, the gram weight and material of the paper layer meet any one of the following: the gram weight of the paper layer is 80g / m 2 , and its material is at least one of natural kraft paper and bleached kraft paper. After being folded and pressed, the paper layer is used to form at least one packaging product such as a hardcover box and a soft handbag. The gram weight of the paper layer is 300g / m 2 , its material is white cardboard, and after being folded and pressed, the paper layer is used to form at least one packaging product such as a soft paper box and a hard packaging bag.

[0012] Preferably, the color coating of the film layer is selected from the printing patterns in the group consisting of silver and blue.

[0013] Preferably, the size relationship among the paper layer, the film layer and the cloud silk non-woven fabric meets: the size of the paper layer is smaller than that of the film layer so that the paper layer can be embedded in the film layer; the size of the film layer is equal to that of the cloud silk non-woven fabric.

[0014] Preferably, the film layer and the cloud silk non-woven fabric are provided with hole-punching structures at corresponding positions for the installation of the hand-carrying rope.

[0015] Preferably, it is characterized by including the following steps:

[0016] First step, cut and fold 80 - 300g / m 2 paper to form a paper layer prototype;

[0017] Second step, perform unilateral aluminizing and color printing on the other side of the PET / OPP base film at 280°C to form a film layer;

[0018] Third step, bond the aluminized surface of the film layer and the paper layer through a lamination process at 280°C;

[0019] Fourth step, laminate 10 - 20g / m 2 non-woven fabric on the color-printed surface of the film layer at 280°C to form a cloud silk non-woven fabric;

[0020] Fifth step, trim and shape the composite structure.

[0021] Preferably, in the fourth step, the dosage of the cloud silk non-woven fabric is 10g / m 2 , and two lamination processes respectively form a laminated film layer of 15g / m 2 .

[0022] Preferably, when trimming in the fifth step, hand-carrying rope installation holes are opened on the composite structure.

[0023] Compared with the prior art, the beneficial effects of the present invention are as follows: For the packaging product and its processing technology, the packaging product produced by the secondary coating process can effectively improve the uniformity between the composite layers of the finally produced packaging bag by controlling the temperature during the production process of the packaging product. Moreover, the paper layer, the film layer and the cloud silk non-woven fabric are not likely to separate from each other. At the same time, the packaging bag has high mechanical strength and functions of anti-slip, anti-scratch, waterproof, moisture-proof and anti-radiation. The specific content is as follows:

[0024] Through the gradient composite of the paper layer, the film layer and the cloud silk non-woven fabric, it combines the stiffness of paper materials, the barrier property of films and the flexible touch of non-woven fabrics, significantly improving the mechanical strength (such as tear resistance and folding resistance) and functionality (moisture-proof and light-proof) of the packaging product;

[0025] The proportion of the cloud silk non-woven fabric being 30% - 40% optimizes the balance between overall light weight and wear resistance, especially suitable for diverse packaging requirements such as high-end hardcover boxes and soft bags;

[0026] The base film (PET / OPP) is paired with an aluminum layer and a color coating to achieve customized high-brightness / matte visual effects and metallic lusters. At the same time, the aluminum layer enhances the oxygen and moisture barrier properties, extending the shelf life of the contents;

[0027] The color coating can print patterns such as silver and blue, directly eliminating the traditional step of externally pasting labels and reducing production costs;

[0028] Both the film layer and the non-woven fabric are bonded by high-temperature coating (280°C) without additional adhesives, avoiding solvent pollution, and the coating layer (15 g / m 2 ×2) precisely controls the thickness to ensure bonding uniformity;

[0029] The basis weight of the paper layer (80 g / m 2 、 / 300 g / m 2 ) and the differentiation design of the materials (kraft paper, white cardboard) can be compatible with different packaging forms such as soft cartons, rigid bags, hardcover boxes and soft paper bags, meeting the needs of multiple industries such as food and gifts;

[0030] The coating process reduces material waste, and the cloud silk non-woven fabric can use recycled fibers, conforming to the trend of green packaging. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 is a process flow diagram of the production process of the packaging product in the present invention;

[0032] Figure 2 is a structural diagram of the packaging bag in the present invention;

[0033] Figure 3 is a structural diagram of the packaging box in the present invention;

[0034] Figure 4 For the present invention Figure 2 Schematic cross-sectional view of the structure at the middle paper layer;

[0035] Figure 5 For the present invention Figure 4 Schematic cross-sectional view of the structure at the middle film layer.

[0036] In the figure: 1, paper layer; 2, film layer; 201, base film; 202, aluminum layer; 203, color coating; 3, cloud silk non-woven fabric. Specific embodiments

[0037] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention; obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0038] Embodiment 1

[0039] Please refer to Figures 1-5 , the present invention provides a technical solution: a packaging product and its processing technology, including a paper layer 1, a film layer 2, and a cloud silk non-woven fabric 3 that are sequentially laminated from the inside to the outside. Paper layer 1: Select 80g / m 2 bleached kraft paper, cut into a rectangle of 200mm×150mm, and formed into a prototype of a hardcover box through folding and pressing;

[0040] The film layer 2 is bonded to the outer surface of the paper layer 1 through a lamination process. It includes a base film 201, an aluminum layer 202 provided on one side of the base film 201, and a color coating 203 on the other side. Film layer 2: The base film 201 is made of PET material to form a high-brightness film; the aluminum layer 202 is attached to one side of the PET film through a vacuum aluminizing process; the color coating 203 is a silver printed pattern (such as a brand logo) printed on the other side;

[0041] The cloud silk non-woven fabric 3 is bonded to the outside of the color coating 203 of the film layer 2 through a lamination process. Cloud silk non-woven fabric 3: Select 10g / m 2 cloud silk non-woven fabric, with the same size as the film layer (200mm×150mm), accounting for 35% of the total mass of the packaging;

[0042] Among them, the lamination process is a processing technology that combines different substrates (such as paper, film, non-woven fabric, etc.) through a molten thermoplastic material (such as polyethylene PE, polypropylene PP, etc.). Its core is to evenly coat or press the plastic melt on the surface of the substrate through an extruder to form a firm adhesive layer. The steps are as follows: Melting and extrusion: The thermoplastic resin (such as LDPE) is heated to a molten state in the extruder (usually 270 - 330 °C); Film forming by lamination: The melt is extruded through a flat die head to form a continuous and uniform film-like fluid; Pressing and compounding: The melt film is pressed against the substrate (such as a paper layer, a film layer) under the action of a pressure roller (such as a silica gel roller) and solidifies and adheres after cooling;

[0043] The substrate film 201 is made of at least one material of PET and OPP; when PET is used, a high-brightness film is formed, and when OPP is used, a matte film is formed. The substrate film (PET / OPP) is combined with an aluminum layer and a color coating to achieve customization of the high-brightness / matte visual effect and metallic luster. At the same time, the aluminum layer enhances the oxygen and moisture barrier properties and extends the shelf life of the contents;

[0044] The mass of the film layer 2 is 15 - 20 g / m 2 , the mass of the cloud-like non-woven fabric 3 accounts for 30% - 40% of the total mass of the packaging product. The proportion of 30% - 40% of the cloud-like non-woven fabric optimizes the balance between overall light weight and wear resistance, and is especially suitable for diverse packaging requirements such as high-end hardcover boxes and soft bags;

[0045] The grammage and material of the paper layer 1 meet any one of the following: The grammage of the paper layer 1 is 80 g / m 2 , and its material is at least one kind of paper such as natural kraft paper and bleached kraft paper. After being folded and pressed, the paper layer 1 is used to form at least one packaging product such as a hardcover box and a soft hand-held bag. The grammage of the paper layer 1 is 300 g / m 2 , and its material is white cardboard. After being folded and pressed, the paper layer 1 is used to form at least one packaging product such as a soft paper box and a hard packaging bag. The color coating 203 of the film layer 2 is selected from the group consisting of silver and blue for the printed pattern. The colors printed by the color coating 203 preferably include silver and blue, and may also include other colors;

[0046] The size relationship among the paper layer 1, the film layer 2, and the cloud-like non-woven fabric 3 satisfies: The size of the paper layer 1 is smaller than that of the film layer 2 so that the paper layer 1 can be embedded in the film layer 2; The size of the film layer 2 is equal to that of the cloud-like non-woven fabric 3. The paper layer size is smaller than the film layer: The film layer completely covers the edge of the paper layer to prevent the paper layer from being directly exposed to the external environment and prevent delamination or damage caused by friction, moisture absorption, or tearing at the edge. The film layer and the non-woven fabric have equal sizes: Ensure that the non-woven fabric completely covers the color coating (203) of the film layer, avoid abrasion or oxidation of the printing layer, and at the same time enhance the appearance consistency;

[0047] The film layer 2 and the cloud silk non-woven fabric 3 are provided with corresponding hole structures for installing the hand rope. After the hand rope passes through the corresponding holes of the film layer and the non-woven fabric, the tension is shared by the two layers of materials to avoid a single layer (such as only the non-woven fabric) from being torn due to concentrated force.

[0048] Follow these steps:

[0049] The first step is to 80-300g / m 2 The paper is cut, folded and pressed to form a prototype of a paper layer 1;

[0050] 80g / m 2 The bleached kraft paper is cut and folded into shape, leaving creases for the box body;

[0051] Step 2: Aluminum is plated on one side of the PET / OPP substrate film 201 and color printed on the other side at 280° C. to form a film layer 2;

[0052] The PET substrate film was aluminum-plated on one side at 280°C, and the other side was gravure-printed with a silver pattern;

[0053] Step 3: Bond the aluminum-plated surface of the film layer 2 to the paper layer 1 by a coating process at 280°C;

[0054] The aluminum-plated surface of the film layer is bonded to the paper layer through a coating process (280°C), with a coating amount of 15g / m 2 ;

[0055] Step 4: Heat 10-20g / m 2 The non-woven fabric is coated on the color-printed surface of the film layer 2 to form a cloud-silk non-woven fabric 3;

[0056] Laminating again (280℃) to laminate the cloud silk non-woven fabric to the outside of the color coating, with a laminating amount of 15g / m 2 ;

[0057] Step 5: Trim and shape the composite structure.

[0058] Trim the edges and make a 5mm diameter round hole on the top of the box for inserting the hand rope.

[0059] In step 4, the amount of cloud silk non-woven fabric 3 is 10g / m 2 , and the two coating processes form 15g / m 2 The coating layer is provided. When trimming in step five, a hand rope installation hole is opened on the composite structure to facilitate the installation of the hand rope.

[0060] Example 2

[0061] Material selection:

[0062] Paper layer 1: 80g / m 2Natural kraft paper, cut into 300mm×200mm, folded and pressed to form a soft handle bag structure;

[0063] Film layer 2: The base film 201 is made of OPP material to form a matte effect;

[0064] The color coating 203 is printed with a blue gradient;

[0065] Cloud silk non-woven fabric 3: Select 20g / m 2 non-woven fabric, accounting for 40% of the total packaging mass.

[0066] Processing technology

[0067] The steps are similar to those in Example 1, except that:

[0068] The OPP base film is aluminized at 280°C and then directly printed with a blue pattern;

[0069] After the non-woven fabric is coated, there is no need to punch holes, and it is directly heat-sealed at the edge to form the mouth of the paper bag.

[0070] Example 3

[0071] Material selection:

[0072] Paper layer 1: 300g / m 2 white cardboard, folded and pressed into a rigid packaging box;

[0073] Film layer 2: PET base material + double-color printing with a silver bottom + blue text;

[0074] Cloud silk non-woven fabric 3: Take 15g / m 2 of cloud silk non-woven fabric 3, accounting for 30% of the total packaging mass.

[0075] Key process

[0076] Adjust the pressure to 0.3MPa during coating to ensure the bonding strength between the thick paper layer and the film layer;

[0077] After trimming, use the laser drilling process to open the handle rope installation holes.

[0078] Working principle of packaging products

[0079] Paper layer: Paper layer 1 serves as the inner layer of the packaging product, providing basic support and forming ability. Paper layers with different gram weights and materials are suitable for different types of packaging products. Natural kraft paper or bleached kraft paper with a weight of 80g / m 2 has a flexible texture and can be used to make hardcover boxes and soft handle bags after folding and pressing, meeting the requirements for packaging flexibility and certain strength; White cardboard with a weight of 300g / m 2 has a higher hardness and is suitable for folding and pressing to form soft paper boxes and rigid packaging bags, which can bear greater weight and pressure to protect the internal items.

[0080] Film layer: The base film 201 in the film layer 2 provides a high-gloss or matte appearance effect depending on the PET or OPP material to meet the diverse visual needs of packaging. The aluminum layer has good barrier properties and can effectively block oxygen, moisture, light, etc., to prevent internal items from oxidation, moisture or deterioration due to light, thereby extending the shelf life of the items; the color coating is used to print various patterns and text information, which plays a role in beautifying the packaging and conveying product information.

[0081] Yunsi non-woven fabric: Yunsi non-woven fabric 3 accounts for 30%-40% of the mass, giving the packaging products good texture and strength, improving the durability and aesthetics of the packaging. At the same time, its natural and environmentally friendly characteristics also meet the requirements of modern packaging for green environmental protection.

[0082] Structural design advantages: The three layers of materials are compounded from the inside to the outside, and are tightly bonded through the coating process to form a stable composite structure. The size of the paper layer 1 is smaller than the film layer 2, and the film layer 2 is equal to the size of the cloud silk non-woven fabric 3. This design allows the film layer 2 to completely cover the edge of the paper layer 1 to prevent the edge of the paper layer 1 from being worn and damp. At the same time, the cloud silk non-woven fabric 3 fits tightly with the film layer 2, further enhancing the stability of the overall structure. The hole structure at the corresponding position on the film layer 2 and the cloud silk non-woven fabric 3 facilitates the installation of a hand rope, making the packaged product easy to carry.

[0083] Working principle of processing technology

[0084] Paper layer pretreatment: 80-300g / m 2 Paper cutting and folding form the prototype of the paper layer. According to the needs of different packaging products, paper with appropriate weight and material is selected. The shape and structure of the packaging are preliminarily determined through cutting and folding, providing a basis for subsequent composite processing.

[0085] Film layer production: Aluminum is plated on one side of the PET / OPP substrate film 201 and color printed on the other side at 280°C. The high temperature environment puts the substrate film 201 in a suitable physical state, which is convenient for the aluminum plating and color printing processes. The aluminum plating process forms an aluminum layer on one side of the substrate film to enhance the barrier performance; color printing forms a color coating on the other side to achieve packaging decoration and information transmission functions.

[0086] Composite process: Also at 280℃, the aluminum-plated surface of the film layer 2 is first bonded to the paper layer 1 through the coating process. The high temperature melts the coating material and fills the tiny pores on the surface of the paper layer 1 and the film layer 2 under pressure to form a strong bond. Then the non-woven fabric is coated on the color-printed surface of the film layer 2 to form the cloud silk non-woven fabric 3. Both coating processes form 15g / m 2 The coating layer ensures that the layers are tightly bonded to form a stable composite structure.

[0087] Post-processing: Trim and shape the composite structure, and drill holes for carrying ropes at appropriate positions to make the packaging products meet the design requirements and have complete functions for use.

[0088] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements for some of the technical features. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. A packaging product, characterized in that, It comprises a paper layer (1), a film layer (2) and a cloud silk nonwoven fabric (3) which are laminated in sequence from the inside to the outside; The film layer (2) is bonded to the outer surface of the paper layer (1) by a coating process, and comprises a base film (201), an aluminum layer (202) arranged on one side of the base film (201), and a color coating layer (203) on the other side; The cloud silk non-woven fabric (3) is bonded to the outer side of the color coating (203) of the film layer (2) through a coating process.

2. The packaging article according to claim 1, wherein, The substrate film (201) is at least one of PET and OPP. When PET is used, a high-gloss film is formed, and when OPP is used, a matte film is formed.

3. The packaging article according to claim 1, characterized in that, The mass of the thin film layer (2) is 15 to 20 g / m 2 , and the mass of the cloud-like non-woven fabric (3) accounts for 30% to 40% of the total mass of the packaging product.

4. The packaging article according to claim 1, wherein The grammage and material of the paper layer (1) satisfy any one of the following: the grammage of the paper layer (1) is 80 g / m 2 , and its material is at least one of natural kraft paper and bleached kraft paper. Moreover, after folding and pressing, the paper layer (1) is used to form at least one packaging product such as a hardcover box or a soft handbag. The grammage of the paper layer (1) is 300 g / m 2 , and its material is white cardboard. Moreover, after folding and pressing, the paper layer (1) is used to form at least one packaging product such as a soft paper box or a hard packaging bag.

5. The packaging article according to claim 1, characterized in that, The color coating (203) of the film layer (2) is a printed pattern selected from the group consisting of silver and blue.

6. The packaging article according to claim 1, wherein, The size relationship between the paper layer (1), the film layer (2) and the cloud silk non-woven fabric (3) satisfies: the size of the paper layer (1) is smaller than that of the film layer (2), so that the paper layer (1) can be embedded in the film layer (2); and the size of the film layer (2) is equal to that of the cloud silk non-woven fabric (3).

7. The packaging article according to claim 1, wherein The film layer (2) and the cloud silk non-woven fabric (3) are provided with corresponding hole structures for installing a hand-carrying rope.

8. A processing technology of the packaging product according to any one of claims 1-7, characterized in that, The following steps are involved: Step 1: Cut, fold, and press 80 - 300 g / m 2 paper to form a prototype of paper layer (1); Step 2: Aluminum-plating on one side of the PET / OPP substrate film (201) and color printing on the other side at 280° C. to form a film layer (2); Step 3: bonding the aluminum-plated surface of the film layer (2) to the paper layer (1) by a coating process at 280° C.; Step 4: At 280 °C, apply 10 - 20 g / m 2 of non-woven fabric onto the printed surface of the film layer (2) to form a cloud-like non-woven fabric (3); Step 5: Trim and shape the composite structure.

9. The processing technology according to claim 8, characterized in that, In the fourth step, the dosage of the cloud silk non-woven fabric (3) is 10 g / m 2 , and the two coating processes respectively form a coating layer of 15 g / m 2 .

10. The processing technology according to claim 8, wherein In the step 5, a hand rope installation hole is opened on the composite structure during pruning.

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