Moisture-proof thermal paperboard

Abstract

The utility model discloses a kind of damp-proof heat preservation paperboard, can be made into carton use, from outside to inside including outer layer, heat preservation layer and aluminium foil layer;The outer layer is at least one of kraft paper, color printing paper or aluminium foil paper, the heat preservation layer is filled with fermentation foam, the aluminium foil layer is aluminium foil paper, the outer layer, heat preservation layer and aluminium foil layer are compounded into a whole by environment-friendly water-based adhesive.The utility model is compounded by heat preservation layer and aluminium foil layer, improve the heat preservation effect of paperboard, and improve the damp-proof effect, especially for the preservation of cold-chain food damp-proof, and improve the strength of paperboard, solve the defect that the strength is low when the existing paperboard is made into carton use, easy to damage.

Description

Technical Field

[0001] This utility model relates to the field of sampling device technology, specifically to a moisture-proof and heat-insulating cardboard. Background Technology

[0002] Cardboard can be made into cartons for storing and transporting various goods and food. Currently, most cardboard uses a single-layer or simple laminated structure, which has the following drawbacks:

[0003] Its poor thermal insulation performance cannot meet the needs of cold chain logistics, food insulation and other scenarios;

[0004] Insufficient moisture resistance; prone to deformation and mold growth in humid environments.

[0005] Some composite panels use non-degradable materials such as plastic film, resulting in poor environmental performance. Utility Model Content

[0006] In view of the above-mentioned technical deficiencies, the purpose of this utility model is to provide a moisture-proof and heat-insulating cardboard to solve the shortcomings of existing cardboard that cannot simultaneously provide both moisture-proof and heat-insulating properties.

[0007] To solve the above-mentioned technical problems, the present invention adopts the following technical solution: The present invention provides a moisture-proof and heat-insulating cardboard, which includes an outer layer, a heat-insulating layer and an aluminum foil layer from the outside to the inside; the outer layer is at least one of kraft paper, color-printed paper or aluminum foil paper, the heat-insulating layer is filled with fermented foam, the aluminum foil layer is aluminum foil paper, and the outer layer, the heat-insulating layer and the aluminum foil layer are composited into a whole by an environmentally friendly water-based adhesive.

[0008] Preferably, the thickness of the insulation layer is 3-7 mm.

[0009] Preferably, the fermentation foam is replaced with polyurethane foam, pearl cotton, or aerogel felt.

[0010] Preferably, the aluminum foil layer is a perforated aluminum foil with a pore size of 0.1-0.5 mm and an open area ratio of 3-10%.

[0011] Preferably, the insulation layer has an embossed structure with a depth of 0.5-0.8 mm.

[0012] The beneficial effects of this utility model are as follows: This utility model improves the heat insulation effect of cardboard and the moisture-proof effect by combining the heat insulation layer and the aluminum foil layer, especially for the preservation and moisture-proofing of cold chain food. It also improves the strength of cardboard and solves the defects of existing cardboard boxes that are low in strength and easily damaged. Attached Figure Description

[0013] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0014] Figure 1 A schematic diagram of the overall structure of this utility model.

[0015] Figure 2 An enlarged view of this utility model.

[0016] Figure 3 A cross-sectional view provided for this utility model.

[0017] Explanation of reference numerals in the attached diagram: Outer layer 1, Insulation layer 2, Aluminum foil layer 3. Detailed Implementation

[0018] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0019] like Figures 1-3 As shown, this utility model provides a moisture-proof and heat-insulating cardboard, which includes an outer layer 1, a heat-insulating layer 2, and an aluminum foil layer 3 from the outside to the inside;

[0020] The outer layer 1 is selected from at least one of kraft paper, color-printed paper or aluminum foil, with a thickness of 0.5-1.2mm being optimal; the outer layer 1 is preferably a composite structure of kraft paper and aluminum foil, which has both strength and reflective heat insulation functions.

[0021] The insulation layer 2 has a thickness of 3-7mm and is made of fermented foam or other alternative materials (such as polyurethane foam, pearl cotton), with a thermal conductivity of ≤0.04W / (m·K). The insulation layer (2) can be provided with a embossed structure with a depth of 0.5-0.8mm. The shape of the embossed structure is one of circle, square, or hexagon. The side length of the embossed structure forms ribs to enhance the strength of the cardboard.

[0022] The fermentation foam can be bio-based, with a natural degradation rate of ≥80% after 180 days.

[0023] Aluminum foil layer 3, with a thickness of 0.05-0.2mm, is placed inside the insulation layer and is formed into a continuous barrier layer through hot pressing.

[0024] The aluminum foil layer and the insulation layer form a "reflective-barrier" dual-effect heat insulation structure. The insulation layer 2 keeps the product warm, while the aluminum foil layer 3 provides insulation, moisture protection, and prevents water seepage for cold chain logistics and food.

[0025] This utility model is specifically described through the following embodiments:

[0026] Example 1:

[0027] The outer layer 1 is made of a composite layer of 0.8mm kraft paper and 0.1mm aluminum foil;

[0028] Insulation layer 2 uses 5mm corn starch fermented foam;

[0029] The aluminum foil layer 3 uses 0.1mm rolled aluminum foil.

[0030] Test results: At 28℃, the internal temperature change was ≤2℃ / h; no deformation was observed after 48 hours in an environment with 95% humidity.

[0031] Example 2:

[0032] The outer layer 1 is made of 0.6mm aluminum foil;

[0033] Insulation layer 2 uses 7mm fermented foam;

[0034] The aluminum foil layer 3 uses 0.15mm perforated aluminum foil (5% air permeability).

[0035] Test results: Compressive strength reached 280 kPa, moisture permeability 3.2 g / (m²) 2 •24h). Example 2 is applicable to fruit and vegetable packaging scenarios that require moderate air permeability.

[0036] Obviously, those skilled in the art can make various modifications and variations to this utility model without departing from its spirit and scope. Therefore, if these modifications and variations fall within the scope of the claims of this utility model and their equivalents, this utility model also intends to include these modifications and variations.

Claims

1. A moisture-proof and heat-insulating cardboard, characterized in that, From the outside to the inside, it includes an outer layer (1), an insulation layer (2), and an aluminum foil layer (3); the outer layer (1) is at least one of kraft paper, color-printed paper, or aluminum foil paper; the insulation layer (2) is filled with fermented foam; the aluminum foil layer (3) is aluminum foil paper; the outer layer (1), the insulation layer (2), and the aluminum foil layer (3) are bonded together as a whole by an environmentally friendly water-based adhesive; the thickness of the insulation layer (2) is 3-7mm; the fermented foam is replaced by polyurethane foam, pearl cotton, or aerogel felt; the aluminum foil layer (3) is perforated aluminum foil with a pore size of 0.1-0.5mm and an opening rate of 3-10%; the insulation layer (2) is provided with a concave-convex embossed structure with a depth of 0.5-0.8mm.

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