Environment-friendly degradable material printing color box and manufacturing method thereof

Abstract

The invention discloses an environment-friendly degradable material printing color box and a manufacturing method thereof, and belongs to the field of environment-friendly packaging materials. A box body of the printing color box is made of degradable calcium plastic corrugated boards, and degradable ultraviolet absorption face paper is detachably mounted on the outer surface of the box body. The degradable calcium plastic corrugated board contains a photosensitizer, and the degradable ultraviolet absorption surface paper contains an ultraviolet absorbent. According to the invention, the biodegradable ultraviolet absorption film covers the surface of the photodegradable corrugated case body, so that the overall degradation of the printing color case is basically sufficient, rapid and controllable at lower cost, and meanwhile, the printing color case has good water-based ink repeated printing performance and has commercial value.

Description

Technical Field

[0001] The invention relates to the field of environmentally friendly packaging materials, and in particular to an environmentally friendly degradable material printed color box and a manufacturing method thereof. Background Art

[0002] Corrugated paper boxes are the most widely used packaging materials in people's lives. With its superior performance and processing performance, it is widely praised by manufacturers and users in the transportation industry. The surface of corrugated paper boxes can be printed with beautification and promotional materials to make printed color boxes, which further broadens the use of this packaging material. Among them, calcium plastic corrugated paper boxes, which are mainly made of polyolefin resin and inorganic fillers such as calcium carbonate, have unique high compression resistance, impact resistance, large angle distortion resistance, and moisture resistance, and have no demand for wood. They are the key packaging products promoted in many countries.

[0003] Existing calcium plastic corrugated paper boxes contain a large amount of difficult-to-degrade polyolefin resins, such as polyethylene (PE), polypropylene (PP) etc., which have potential negative impacts on the environment. In some patent documents, a large amount of starch is added into the raw materials of calcium plastic corrugated paper boxes to reduce the amount of polyolefin resin. However, the so-called degradable plastics adding modified starch only have starch therein that can be naturally degraded, and PP, PE etc. still remain in the soil to cause pollution, so such an approach cannot fundamentally solve the problem. In other studies, biodegradable polybutylene terephthalate-adipate (PBAT) and polylactic acid (PLA) gradually come into people's view. However, the price of fully biodegradable plastics is too expensive, and with current technical conditions, the cost of adding a large amount of corrugated paper is difficult for producers to bear.

[0004] The last mature environmentally friendly resin material in the prior art is photodegradable plastic. Additive photodegradable plastics commonly used in industry are made by adding photosensitizers (benzophenone, para-benzoquinone, etc.) to ordinary plastics such as PP and PE; under the irradiation of sunlight (ultraviolet rays), photosensitizers can release free radicals to trigger the oxidation and breakage of polyolefin polymers. Additive photodegradable plastics have low production costs and simple processes, but their degradation effect is greatly related to the amount of light exposure, and the degradation time is less controllable. If the content of photosensitizer is increased to increase the degradation rate, in order to prevent the material from disintegrating during daily use, a large amount of antioxidants must be added to regulate the degradation induction period, which increases costs and may also affect the performance of the material.

[0005] In summary, the prior art lacks a printed color box using packaging materials that are developed based on existing cheap materials, have controllable degradation (ie, do not degrade prematurely during use), and have a fast and sufficient degradation rate. Summary of the invention

[0006] In view of the deficiencies in the prior art, the present invention provides an environmentally friendly and degradable printed color box and a method for manufacturing the same, which can achieve a faster degradation rate and a more sufficient degree of degradation under the condition of controlling costs, and has no negative impact on the mechanical properties of the material.

[0007] The technical solution adopted by the present invention is as follows:

[0008] An environmentally friendly degradable material printed color box, whose box body is made of degradable calcium plastic corrugated paperboard, and the outer surface of the box body is detachably mounted with degradable ultraviolet absorbing surface paper; the degradable calcium plastic corrugated paperboard contains a photosensitizer, and the degradable ultraviolet absorbing surface paper contains an ultraviolet absorber.

[0009] Furthermore, the degradable calcium plastic corrugated cardboard is made of the following components: starch, high-density polyethylene and calcium carbonate in a mass ratio of 1:0.8-1.2:1.5-2, a stabilizer and an antioxidant accounting for 0.2%-0.5% of the total mass of the degradable calcium plastic corrugated cardboard respectively, and a photosensitizer accounting for 0.05%-1% of the total mass of the degradable calcium plastic corrugated cardboard.

[0010] Furthermore, the degradable UV-absorbing facial paper is made of the following components in parts by mass: 60 to 75 parts of polybutylene terephthalate-adipate (PBAT), 3 to 8 parts of polylactic acid (PLA), 23 to 40 parts of filler, 0.4 to 0.8 parts of lubricant, 0.2 to 0.6 parts of emulsifier, 0.3 to 0.5 parts of antioxidant and 0.1 to 0.4 parts of UV absorber.

[0011] Furthermore, the thickness of the degradable ultraviolet absorbing tissue paper is 0.05-0.2 mm.

[0012] In the above scheme, the environmentally friendly and degradable material printed color box body is made of highly photosensitivity degradable material, and the outer surface is covered with biodegradable facial paper that absorbs ultraviolet rays, so that the box body will hardly degrade before the facial paper is peeled off, and the discarded box body can be degraded more fully at a higher rate after the facial paper is damaged.

[0013] The present invention also provides a method for manufacturing an environmentally friendly and degradable material printed color box, the steps of which include:

[0014] S1: cutting the degradable calcium plastic corrugated cardboard into box pieces, and pasting degradable ultraviolet absorbing paper on the outer surface of the box pieces;

[0015] S2: Multi-color printing on facial paper using environmentally friendly water-based ink;

[0016] S3: bonding the corrugated cardboard into color box sheets using an environmentally friendly adhesive, and performing die-cutting, creasing, nailing / gluing to obtain the environmentally friendly and degradable material printed color box.

[0017] Furthermore, the degradable calcium plastic corrugated paperboard is prepared by the following method:

[0018] S1: Mix starch, high-density polyethylene and calcium carbonate in a mass ratio of 1:0.8-1.2:1.5-2;

[0019] S2: adding 0.05% to 1% of the total mass of a photosensitizer and 0.2% to 0.5% of the total mass of a stabilizer and an antioxidant, and mixing them evenly in a high-speed mixer;

[0020] S3: extruding the mixture into granules through a twin-screw extruder at high temperature, and then extruding calcium plastic corrugated paper through a single screw;

[0021] S4: The calcium plastic corrugated paper is plastically deformed into a wave shape after being pressurized by a corrugating roller, and then thermally bonded to form the degradable calcium plastic corrugated paperboard.

[0022] Furthermore, the degradable ultraviolet absorbing facial tissue is prepared by the following method:

[0023] The invention relates to a method for preparing a degradable UV-absorbing facial tissue paper comprising: weighing 60 to 75 parts of polybutylene terephthalate-adipate (PBAT), 3 to 8 parts of polylactic acid (PLA), 23 to 40 parts of a filler, 0.4 to 0.8 parts of a lubricant, 0.3 to 0.5 parts of an antioxidant, 0.2 to 0.6 parts of an emulsifier and 0.1 to 0.4 parts of an ultraviolet absorber, and mixing and dispersing the raw materials uniformly, extruding and granulating the mixed materials, blowing the mixed materials into a film having a thickness of 0.05 to 0.2 mm, and performing a corona treatment to obtain the degradable UV-absorbing facial tissue paper.

[0024] In the above scheme, the main raw material of the degradable UV-absorbing facial tissue is a biodegradable resin containing PBAT and PLA. This composite resin can be completely degraded into water and CO2, has high biosafety and good film-forming performance.

[0025] The technical solution of the present invention has the following beneficial effects:

[0026] 1. During the use of the printed color box of the present invention, the biodegradable ultraviolet absorbing surface paper covers the surface of the photodegradable corrugated paper box to protect the box from degradation; after the printed color box is discarded, the surface paper is damaged or peeled off, and the box is directly exposed to ultraviolet rays and degraded, thereby achieving controllable degradation of the main part of the color box;

[0027] 2. The box material of the present invention has a synergistic degradation mechanism of starch water-oxygen degradation and polyethylene light degradation. One degradation triggers the material disintegration, which can increase the contact area between the material and light or water-oxygen, and promote the occurrence of another degradation. Therefore, the box material has a relatively fast degradation rate after the cover of the facial paper is removed;

[0028] 3. The printed color box of the present invention uses degradable materials for all parts of the box body and the surface paper. Therefore, after the box is discarded, there will be no problem of a large amount of difficult-to-degrade plastic left after the starch in the traditional starch calcium plastic box is degraded;

[0029] 4. The relatively expensive PBAT and PLA materials used in the present invention are limited to the thin film face paper on the outer surface of the box, so while achieving the above-mentioned effects, the total cost is relatively low. DETAILED DESCRIPTION

[0030] The present invention is further described below in conjunction with the embodiments to more clearly and completely describe the technical solution of the present invention. Obviously, the described embodiments are only a part of the implementation of the present invention, and are for the purpose of illustrating the technical solution of the present invention rather than limiting it.

[0031] The invention discloses an environmentally friendly degradable material printed color box, wherein the box body is made of degradable calcium plastic corrugated paperboard, and the outer surface of the box body is detachably mounted with degradable ultraviolet absorbing paper; the degradable calcium plastic corrugated paperboard contains a photosensitizer, and the degradable ultraviolet absorbing paper contains an ultraviolet absorber.

[0032] An environmentally friendly degradable material printed color box, whose box body is made of degradable calcium plastic corrugated paperboard, and the outer surface of the box body is detachably mounted with degradable ultraviolet absorbing surface paper; the degradable calcium plastic corrugated paperboard contains a photosensitizer, and the degradable ultraviolet absorbing surface paper contains an ultraviolet absorber.

[0033] Furthermore, the degradable calcium plastic corrugated cardboard is made of the following components: starch, high-density polyethylene and calcium carbonate in a mass ratio of 1:0.8-1.2:1.5-2, a stabilizer and an antioxidant accounting for 0.2%-0.5% of the total mass of the degradable calcium plastic corrugated cardboard respectively, and a photosensitizer accounting for 0.05%-1% of the total mass of the degradable calcium plastic corrugated cardboard.

[0034] Furthermore, the degradable UV-absorbing facial paper is made of the following components in parts by mass: 60 to 75 parts of polybutylene terephthalate-adipate (PBAT), 3 to 8 parts of polylactic acid (PLA), 23 to 40 parts of filler, 0.4 to 0.8 parts of lubricant, 0.2 to 0.6 parts of emulsifier, 0.3 to 0.5 parts of antioxidant and 0.1 to 0.4 parts of UV absorber.

[0035] In the degradable ultraviolet absorbing paper, the lubricant and emulsifier are combined with corona treatment to make the surface of the paper smooth and the outer surface suitable for printing with water-based environmentally friendly ink. The absorption wavelength of the ultraviolet absorber should cover as much as possible the initiation wavelength of the photosensitizer in the aforementioned degradable calcium plastic corrugated paperboard component; the lubricant can be silicone powder; and the emulsifier can be monoglyceride.

[0036] Furthermore, the thickness of the degradable UV absorbing paper is 0.05-0.2 mm. To improve the UV absorbing performance, the thickness is about twice that of the commonly used color-printed plastic film and is close to the thickness of the agricultural UV absorbing film.

[0037] In the above scheme, the environmentally friendly and degradable material printed color box body is made of highly photosensitivity degradable material, and the outer surface is covered with biodegradable facial paper that absorbs ultraviolet rays, so that the box body will hardly degrade before the facial paper is peeled off, and the discarded box body can be degraded more fully at a higher rate after the facial paper is damaged.

[0038] A method for manufacturing the environmentally friendly and degradable material printed color box of the present invention comprises the following steps:

[0039] S1: cutting the degradable calcium plastic corrugated cardboard into box pieces, and pasting degradable ultraviolet absorbing paper on the outer surface of the box pieces;

[0040] S2: Multi-color printing on facial paper using environmentally friendly water-based ink;

[0041] S3: bonding the corrugated cardboard into color box sheets using an environmentally friendly adhesive, and performing die-cutting, creasing, nailing / gluing to obtain the environmentally friendly and degradable material printed color box.

[0042] Furthermore, the degradable calcium plastic corrugated paperboard is prepared by the following method:

[0043] S1: Mix starch, high-density polyethylene and calcium carbonate in a mass ratio of 1:0.8-1.2:1.5-2;

[0044] S2: Add 0.05% to 1% of the total mass of a photosensitizer and 0.2% to 0.5% of the total mass of a stabilizer and an antioxidant, and mix them evenly in a high-speed mixer;

[0045] S3: extruding the mixture into granules through a twin-screw extruder at high temperature, and then extruding calcium plastic corrugated paper through a single screw;

[0046] S4: The calcium plastic corrugated paper is plastically deformed into a wave shape after being pressurized by a corrugating roller, and then thermally bonded to form the degradable calcium plastic corrugated paperboard.

[0047] Furthermore, the degradable ultraviolet absorbing facial tissue is prepared by the following method:

[0048] The invention relates to a method for preparing a degradable UV-absorbing facial tissue paper comprising: weighing 60 to 75 parts of polybutylene terephthalate-adipate (PBAT), 3 to 8 parts of polylactic acid (PLA), 23 to 40 parts of a filler, 0.4 to 0.8 parts of a lubricant, 0.3 to 0.5 parts of an antioxidant, 0.2 to 0.6 parts of an emulsifier and 0.1 to 0.4 parts of an ultraviolet absorber, and mixing and dispersing the raw materials uniformly, extruding and granulating the mixed materials, blowing the mixed materials into a film having a thickness of 0.05 to 0.2 mm, and performing a corona treatment to obtain the degradable UV-absorbing facial tissue paper.

[0049] In the above scheme, the main raw material of the degradable UV absorbing facial paper is a biodegradable resin containing PBAT and PLA. This composite resin can be completely degraded into water and CO2, has high biological safety, and good film-forming properties. The combination of lubricants and emulsifiers combined with corona treatment can promote the uniform distribution of hydrophilic and lipophilic groups on the film surface, with the hydrophilic groups facing the printing side, which is suitable for printing with more environmentally friendly water-based inks. In addition, the degradable UV absorbing facial paper can be disassembled and replaced, which is convenient for reprinting promotional patterns on packaging materials.

[0050] The following is a detailed description with reference to the embodiments.

[0051] Example 1

[0052] The degradable calcium plastic corrugated paperboard is prepared according to the following steps:

[0053] S1: Weigh 100 g starch, 100 g high-density polyethylene and 200 g calcium carbonate and mix;

[0054] S2: Add 1.2g photosensitizer iron stearate (FeSt3), 0.8g stabilizer zinc stearate and 0.8g antioxidant 1010, and mix well in a high-speed mixer;

[0055] S3: extruding the mixture into granules through a twin-screw extruder at high temperature, and then extruding calcium plastic corrugated paper through a single screw;

[0056] S4: The calcium plastic corrugated paper is plastically deformed into a wave shape after being pressurized by a corrugating roller, and then thermally bonded to form a single-layer degradable calcium plastic corrugated paperboard.

[0057] Prepare the degradable UV absorbing tissue paper as follows:

[0058] According to the mass percentage, 60g of polybutylene terephthalate-adipate (PBAT), 5g of polylactic acid (PLA), 30g of calcium carbonate, 0.6g of silicone powder, 0.3g of antioxidant 1010, 0.3g of monoglyceride and 0.4g of ultraviolet absorber UV-531 were weighed; the raw materials were mixed and dispersed evenly, extruded into granules, blown into a film with a thickness of 0.2mm, and corona treated to obtain the degradable ultraviolet absorbing facial tissue.

[0059] Finally, the degradable material printed color box is prepared according to the following steps:

[0060] S1: cutting the degradable calcium plastic corrugated cardboard into box pieces, and pasting degradable ultraviolet absorbing paper on the outer surface of the box pieces;

[0061] S2: Multi-color printing on facial paper using environmentally friendly water-based ink;

[0062] S3: bonding the corrugated cardboard into color box sheets using an environmentally friendly adhesive, and performing die-cutting, creasing, nailing / gluing to obtain the environmentally friendly and degradable material printed color box.

[0063] Example 2

[0064] The only difference between this embodiment and embodiment 1 is that in step S2 of preparing the degradable calcium plastic corrugated paperboard, the type of photosensitizer added is cerium stearate (CeSt3).

[0065] Example 3

[0066] The difference between this embodiment and embodiment 1 is that in the step of preparing the degradable UV-absorbing facial tissue, the amount of materials other than the UV absorber is 25% of that in embodiment 1, and the film blowing thickness is 0.05 mm.

[0067] Example 4

[0068] The only difference between this embodiment and embodiment 1 is that in the step of preparing the degradable UV-absorbing facial tissue, 0.1 g of UV absorber is added.

[0069] Comparative Example 1

[0070] The only difference between this embodiment and embodiment 1 is that in the step of preparing the degradable UV-absorbing facial tissue, 0.05 g of UV absorber is added.

[0071] Comparative Example 2

[0072] The only difference between this embodiment and embodiment 1 is that no ultraviolet absorber is added in the step of preparing the degradable ultraviolet absorbing facial paper.

[0073] Comparative Example 3

[0074] The difference between this embodiment and embodiment 1 is that in the step of preparing the degradable UV-absorbing facial tissue, the amount of materials other than the UV absorber is 10% of that in embodiment 1, and the film blowing thickness is 0.02 mm.

[0075] Comparative Example 4

[0076] The color box preparation part of this embodiment is exactly the same as that of embodiment 1, and the only difference is that the ultraviolet absorbing surface paper is peeled off in the degradation experiment described later.

[0077] Comparative Example 5

[0078] The only difference between this comparative example and comparative example 3 is that in step S2 of preparing the degradable calcium plastic corrugated paperboard, the type of photosensitizer added is cerium stearate (CeSt3).

[0079] Comparative Example 6

[0080] The only difference between this comparative example and comparative example 3 is that in step S2 of preparing the degradable calcium plastic corrugated paperboard, no photosensitizer is added.

[0081] Degradation experiment 1: A 10 square centimeter piece was cut from the calcium plastic corrugated paper box with face paper prepared in each embodiment and comparative example, and placed in a ventilated sunlight environment for 3 months to consume part of the stabilizer and antioxidant; the face paper on the small pieces of paper boxes in comparative examples 4, 5, and 6 was peeled off, and then the treated small pieces were placed in a xenon lamp aging test box (with the ultraviolet absorbing face paper facing up), and irradiated at 65°C for 72 hours to accelerate aging; finally, the small pieces of each group of paper boxes were taken out, and the infrared spectrum of the corrugated paper surface material under the face paper was detected, and the carboxyl index was calculated, that is, the infrared absorption peak area of ​​the carboxyl region and the 1429cm -1 The ratio of the -CH2- reference absorption peak area.

[0082] Table 1:

[0083]

[0084] The data in Table 1 can illustrate that the photosensitizer added to the degradable calcium plastic corrugated paperboard of the present invention can greatly accelerate the degradation of the box material, among which the effect of ferric stearate inducing degradation is better than that of cerium stearate; the ultraviolet absorber in the degradable ultraviolet absorbing paper can better shield the lower corrugated paperboard from ultraviolet rays, thereby achieving the purpose of controlled degradation. The higher the content of the ultraviolet absorber within a certain range, the better the ultraviolet blocking effect; under the same absorbent dosage, the thickness of the ultraviolet absorbing paperboard also affects the ultraviolet blocking performance, and the ultraviolet absorber dispersed in a film layer of at least 0.05 mm is conducive to the absorption of ultraviolet rays; finally, peeling off the paper before the aging experiment will greatly increase the degradation degree of the box, indicating that the design of the ultraviolet absorbing paper wrapping the box can well protect the box during use.

[0085] Obviously, the above embodiments are merely examples for clear explanation, and are not intended to limit the implementation methods. For those skilled in the art, other different forms of changes or modifications can be made based on the above description, and the obvious changes or modifications derived therefrom should still be considered as the protection scope of the present invention.

Claims

1. A color box printed with environmentally friendly and degradable materials, It is characterized in that The printed color box body is made of degradable calcium plastic corrugated cardboard, and the outer surface of the box is detachably mounted with degradable ultraviolet absorbing paper; the degradable calcium plastic corrugated cardboard contains a photosensitizer, and the degradable ultraviolet absorbing paper contains an ultraviolet absorber.

2. The environmentally friendly and degradable material printed color box according to claim 1, It is characterized in that The degradable calcium plastic corrugated paperboard is made of the following components: starch, high-density polyethylene and calcium carbonate in a mass ratio of 1:0.8-1.2:1.5-2, a stabilizer and an antioxidant accounting for 0.2%-0.5% of the total mass of the degradable calcium plastic corrugated paperboard respectively, and a photosensitizer accounting for 0.05%-1% of the total mass of the degradable calcium plastic corrugated paperboard.

3. The environmentally friendly and degradable material printed color box according to claim 2, It is characterized in that The degradable ultraviolet absorbing facial paper is made of the following components in parts by mass: 60-75 parts of polybutylene terephthalate-adipate, 3-8 parts of polylactic acid, 23-40 parts of filler, 0.4-0.8 parts of lubricant, 0.2-0.6 parts of emulsifier, 0.3-0.5 parts of antioxidant and 0.1-0.4 parts of ultraviolet absorber.

4. The environmentally friendly and degradable material printed color box according to claim 3, It is characterized in that The thickness of the degradable ultraviolet absorbing tissue paper is 0.05-0.2 mm.

5. A method for manufacturing an environmentally friendly and degradable material printed color box according to any one of claims 1 to 4, It is characterized in that The steps include: S1: cutting the degradable calcium plastic corrugated cardboard into box pieces, and pasting degradable ultraviolet absorbing paper on the outer surface of the box pieces; S2: Multi-color printing on facial paper using environmentally friendly water-based ink; S3: bonding the corrugated cardboard into color box sheets using an environmentally friendly adhesive, and performing die-cutting, creasing, nailing / gluing to obtain the environmentally friendly and degradable material printed color box.

6. The method for manufacturing the environmentally friendly and degradable material printed color box according to claim 5, It is characterized in that The degradable calcium plastic corrugated paperboard is prepared by the following method: S1: Mix starch, high-density polyethylene and calcium carbonate in a mass ratio of 1:0.8-1.2:1.5-2; S2: adding 0.05% to 1% of the total mass of a photosensitizer and 0.2% to 0.5% of the total mass of a stabilizer and an antioxidant, respectively, and mixing them evenly in a high-speed mixer; S3: extruding the mixture into granules through a twin-screw extruder at high temperature, and then extruding calcium plastic corrugated paper through a single screw; S4: The calcium plastic corrugated paper is plastically deformed into a wave shape after being pressurized by a corrugating roller, and then thermally bonded to form the degradable calcium plastic corrugated paperboard.

7. The method for manufacturing the environmentally friendly and degradable material printed color box according to claim 5, It is characterized in that The degradable ultraviolet absorbing facial paper is prepared by the following method: Weigh 60-75 parts of polybutylene terephthalate-adipate, 3-8 parts of polylactic acid, 23-40 parts of filler, 0.4-0.8 parts of lubricant, 0.3-0.5 parts of antioxidant, 0.2-0.6 parts of emulsifier and 0.1-0.4 parts of ultraviolet absorber by weight; The raw materials are mixed and dispersed uniformly, extruded and granulated, blown into a film with a thickness of 0.05 to 0.2 mm, and subjected to corona treatment to obtain the degradable ultraviolet absorbing facial tissue.