Composite label and manufacturing process thereof

Abstract

The invention relates to a composite label and a manufacturing process thereof. The composite label comprises a substrate and a non-woven fabric covering film which covers the surface of the substrate through glue. The manufacturing process comprises the following steps: step 1, selecting a material for the substrate; 2, selecting a proper non-woven fabric film covering material from the alternative non-woven fabric materials through a film covering material test; 3, proper film covering operation tension is selected through tension testing; 4, selecting an anilox roller with proper density and proper glue coating amount through a glue ink amount test; 5, printing is conducted on the material for the substrate; step 6, based on an anilox roller with proper density, proper glue coating amount and proper film laminating operation tension, coating glue on the selected substrate material, and laminating the non-woven fabric film laminating material on the substrate material; and 7, performing die cutting to form the composite label. The printing film type is improved, and the market requirement is met; the problems of tension control, glue coating and the like in label manufacturing can be solved.

Description

Technical Field

[0001] This invention relates to the field of label manufacturing, specifically to a composite label and its manufacturing process. Background Technology

[0002] In the current label printing market, although there are a variety of printing processes, including letterpress, gravure, flexographic, screen printing and digital printing, which can meet the expression needs of various patterns, colors and materials to a certain extent, there are still significant technological gaps and process bottlenecks in high-end application scenarios that deeply integrate functionality and sensory experience. Summary of the Invention

[0003] The purpose of this invention is to provide a novel non-woven fabric coated label, improve the label coating type, and meet the market's increasing quality requirements for functional and sensory printed labels.

[0004] To achieve the above objectives, the technical solution adopted by the present invention is as follows: A composite label includes a substrate and a nonwoven fabric coating adhered to the surface of the substrate by adhesive.

[0005] Preferably, the thickness of the nonwoven fabric coating is 0.12-0.14 mm.

[0006] The present invention also provides a manufacturing process for the above-mentioned composite label, which meets its high manufacturing requirements, and the solution is as follows: A manufacturing process for a composite label includes the following steps: Step 1: Select the substrate material; Step 2: Select suitable nonwoven fabric coating materials from the nonwoven fabric candidate materials through coating material testing; Step 3: Select the appropriate lamination tension through tension testing; Step 4: Select an anilox roller with appropriate density and appropriate glue coating amount through glue and ink amount test; Step 5: Print on the substrate material; Step 6: Based on the anilox roller with a suitable density, the suitable amount of adhesive applied, and the suitable lamination tension, apply adhesive to the selected substrate material and then laminate the nonwoven fabric lamination material onto the substrate material. Step 7: Die-cut to form the composite label.

[0007] In step 2, the testing content of the coating material test includes appearance quality test, surface performance test and resistance test.

[0008] Furthermore, the method for testing the appearance quality is as follows: under a standard light source, at a specified observation distance and angle, observe the surface flatness, smoothness, presence of curled edges, and presence of bubbles, wrinkles, or peeling defects of the nonwoven fabric candidate material.

[0009] Furthermore, the surface performance testing method is as follows: using a gloss meter to measure the gloss of the nonwoven fabric candidate material at a specified angle, using a haze meter to test the transparency of the nonwoven fabric candidate material, and evaluating the change in transparency of the nonwoven fabric candidate material after the coating operation.

[0010] Furthermore, the method for the resistance test is as follows: wiping the surface of the nonwoven fabric candidate material with a test reagent, or placing the nonwoven fabric candidate material in a constant temperature and humidity chamber for a period of time, and observing the changes in the appearance and bonding state of the nonwoven fabric candidate material.

[0011] In step 3, the tension test method is as follows: different constant tensions are applied to the nonwoven fabric coating material, and the appropriate coating operation tension is selected based on the tensile strength and edge curling state of the nonwoven fabric coating material after the tension is applied.

[0012] In step 4, the method for testing the amount of adhesive ink is as follows: based on the density of the anilox roller, select multiple alternative adhesive coating amounts; use each of the alternative adhesive coating amounts to coat the nonwoven fabric film material and the substrate material to form multiple samples; and select the appropriate adhesive coating amount based on the peel strength and crease peel resistance of the samples.

[0013] Furthermore, the peel strength of the sample is measured using a tensile testing machine at a specified speed; the sample is folded to form multiple creases, and the crease-peel resistance of the sample is tested based on whether the nonwoven fabric coating material and the substrate separate at the creases.

[0014] Due to the application of the above technical solution, the present invention has the following advantages compared with the prior art: 1. The composite label of the present invention improves the printing and lamination type, which can maintain excellent printability, stable storage and does not affect the physical and chemical properties of the printed product, and plays a role in surface decoration and heat preservation, meeting the market's increasing quality requirements for functional and sensory label printed products. 2. The composite label manufacturing process of the present invention can solve problems such as tension control and adhesive coating, and avoid problems such as unstable substrate feeding, registration deviation or lamination wrinkling, providing supporting materials for the stable implementation of high-precision printing processes. Detailed Implementation

[0015] To enable those skilled in the art to better understand the present invention, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort should fall within the scope of protection of the present invention.

[0016] Example 1: A composite label comprising a substrate and a non-woven fabric lamination. The choice of substrate is unrestricted; paper or film substrates are both acceptable, and a pattern is printed on the substrate. The non-woven fabric lamination is bonded to the substrate surface with adhesive, typically with a thickness of 0.12-0.14 mm. Hot melt adhesive is selected as the adhesive.

[0017] The manufacturing process of the above composite label includes the following steps: Step 1: Select the substrate material.

[0018] Transparent BOPP, specialty films, 50% bright silver BOPP, adhesive films, PE, coated paper, ordinary PPPE polymer film, wrap wrap labels, shrink film, transfer film, cardboard, synthetic paper, etc., can all be used as substrate materials.

[0019] Step 2: Select the appropriate nonwoven fabric coating material from the nonwoven fabric candidate materials through coating material testing.

[0020] The testing content for coated materials includes appearance quality testing, surface performance testing, and resistance testing.

[0021] The main inspection items for appearance quality testing include flatness, smoothness, bubbles, wrinkles, and peeling. The method for appearance quality testing is visual inspection. Under a D65 standard light source, at the specified observation distance and angle, observe the surface flatness, smoothness, presence of curled edges, and the presence of bubbles, wrinkles, or peeling defects in the nonwoven fabric candidate material. If the surface flatness and smoothness are good, and there are no curled edges, bubbles, wrinkles, or peeling defects, then the nonwoven fabric candidate material passes the appearance quality test.

[0022] The main test items for surface performance testing are gloss and transparency (haze). The methods for surface performance testing are: (1) Gloss measurement: use a gloss meter to measure the specular gloss of the nonwoven fabric candidate material at a specified angle (60°); (2) Transmittance and haze measurement: use a haze meter to test the transparency of the nonwoven fabric candidate material and evaluate the change in transparency of the nonwoven fabric candidate material after the coating operation.

[0023] The main test items for resistance testing are solvent resistance, heat resistance, and moisture resistance. The method for resistance testing is as follows: wipe the surface of the nonwoven fabric candidate material with a cotton ball soaked in the test reagent (such as ethanol), or place the nonwoven fabric candidate material in a constant temperature and humidity chamber for a period of time (temperature, humidity, and time are set as needed), and observe the changes in the appearance and bonding state of the nonwoven fabric candidate material.

[0024] Step 3: Select the appropriate coating tension through tension testing.

[0025] The tension test method is as follows: apply different constant tensions to the non-woven fabric coating material, and select the appropriate coating operation tension based on the tensile strength and edge curling state of the non-woven fabric coating material after the tension is applied.

[0026] The tensile strength test results are as follows: Tension magnitude (N) Tensile strength (mm) Judgment result 30 10 NG 20 6 NG 10 2 NG 5 1 OK 3 0.5 OK 2 0 OK Based on the above tensile strength test results and edge curling status, a suitable lamination tension range of 2-3N is selected, and the nonwoven fabric lamination material is fed using this tension during the operation.

[0027] Step 4: Select an anilox roller with appropriate density and appropriate glue coating amount through glue and ink amount test.

[0028] The method for testing the amount of adhesive ink is as follows: Based on the density (line count) of the anilox roller, select multiple alternative adhesive coating amounts. The smaller the line count of the anilox roller, the greater the amount of adhesive transferred. Use each alternative adhesive coating amount to coat the non-woven fabric film material and the substrate material to form multiple samples. Select the appropriate adhesive coating amount based on the peel strength and crease peel resistance of the samples.

[0029] The test results for anilox rollers with different wire harnesses for the same amount of adhesive coating are as follows: Anilox roller density 240 lines 140 lines 80 lines result NG NG OK The sample is subjected to an adhesive strength (or peel strength) test, which tests the adhesion between the nonwoven fabric coating material and the substrate material. Specifically, it includes: (1) Peel strength test: The peel strength of the sample is measured using a tensile testing machine at a measuring speed (300 mm / min), which is the core physical indicator; (2) Crease peel resistance: The sample is folded in a "Z" shape to form multiple creases and pressure is applied. The crease peel resistance of the sample is tested based on whether the nonwoven fabric coating material and the substrate separate at the crease.

[0030] Step 5: Print on the substrate; Step 6: Based on the appropriate density of the anilox roller, the appropriate amount of adhesive applied, and the appropriate lamination tension, apply adhesive to the selected substrate material, laminate the non-woven fabric lamination material onto the substrate material, and cure it to complete the lamination process. Step 7: Die-cut to form composite labels and perform quality inspection.

[0031] Non-woven fabric laminated labels, due to their material properties and composite structure, place higher demands on key process parameters such as printing tension control and adhesive coating uniformity. In actual production, problems such as unstable substrate feeding, registration deviation, or lamination wrinkling often occur due to inaccurate tension control. Simultaneously, improper matching of adhesive ink volume and anilox rollers directly affects coating uniformity and adhesion strength, thus impacting the overall label performance and the effect of the non-woven fabric lamination. Based on this, this invention aims to provide a non-woven fabric lamination manufacturing process for labels. This process improves the printing lamination type to meet the market's increasingly higher quality requirements for functional and sensory printed labels, and provides supporting materials for the stable implementation of high-precision printing processes. In the label printing field, especially in the application environment of composite material labels such as non-woven fabric laminated labels, a non-woven fabric laminated composite material label has been developed that can persistently emit a suitable fragrance, maintain excellent printability, be stably stored, and not affect the physicochemical properties of the printed product.

[0032] The above embodiments are only for illustrating the technical concept and features of the present invention, and are intended to enable those skilled in the art to understand the content of the present invention and implement it accordingly. They should not be construed as limiting the scope of protection of the present invention. All equivalent changes or modifications made in accordance with the spirit and essence of the present invention should be covered within the scope of protection of the present invention.

Claims

1. A composite label, comprising a substrate, characterized in that: The composite label also includes a non-woven fabric coating that is glued to the surface of the substrate.

2. The composite label according to claim 1, characterized in that: The thickness of the nonwoven fabric coating is 0.12-0.14 mm.

3. A manufacturing process for a composite label as described in claim 1, characterized in that: The manufacturing process of the composite label includes the following steps: Step 1: Select the substrate material; Step 2: Select suitable nonwoven fabric coating materials from the nonwoven fabric candidate materials through coating material testing; Step 3: Select the appropriate lamination tension through tension testing; Step 4: Select an anilox roller with appropriate density and appropriate glue coating amount through glue and ink amount test; Step 5: Print on the substrate material; Step 6: Based on the anilox roller with a suitable density, the suitable amount of adhesive applied, and the suitable lamination tension, apply adhesive to the selected substrate material and then laminate the nonwoven fabric lamination material onto the substrate material. Step 7: Die-cut to form the composite label.

4. The manufacturing process of the composite label according to claim 3, characterized in that: The testing content for the coating material includes appearance quality testing, surface performance testing, and resistance testing.

5. The manufacturing process of the composite label according to claim 4, characterized in that: The method for testing the appearance quality is as follows: under a standard light source, at a specified observation distance and angle, observe the surface flatness, smoothness, presence of curled edges, and presence of bubbles, wrinkles, or peeling defects of the nonwoven fabric candidate material.

6. The manufacturing process of the composite label according to claim 4, characterized in that: The surface performance testing method is as follows: using a gloss meter to measure the gloss of the nonwoven fabric candidate material at a specified angle, using a haze meter to test the transparency of the nonwoven fabric candidate material, and evaluating the change in transparency of the nonwoven fabric candidate material after the coating operation.

7. The manufacturing process of the composite label according to claim 4, characterized in that: The method for resistance testing is as follows: wiping the surface of the nonwoven fabric candidate material with a test reagent, or placing the nonwoven fabric candidate material in a constant temperature and humidity chamber for a period of time, and observing the changes in the appearance and bonding state of the nonwoven fabric candidate material.

8. The manufacturing process of the composite label according to claim 3, characterized in that: The tension test method is as follows: different constant tensions are applied to the nonwoven fabric coating material, and the appropriate coating operation tension is selected based on the tensile strength and edge curling state of the nonwoven fabric coating material after the tension is applied.

9. The manufacturing process of the composite label according to claim 4, characterized in that: The method for testing the amount of adhesive ink is as follows: based on the density of the anilox roller, select multiple alternative adhesive coating amounts; use each of the alternative adhesive coating amounts to coat the nonwoven fabric coating material and the substrate material to form multiple samples; select the appropriate adhesive coating amount based on the peel strength and crease peel resistance of the samples.

10. The manufacturing process of the composite label according to claim 9, characterized in that: The peel strength of the sample was determined using a tensile testing machine at a measuring speed. The sample is folded to form multiple creases. The crease resistance and peel resistance of the sample are tested based on whether the nonwoven fabric coating material and the substrate separate at the creases.