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A heat-insulating, non-slip and high-barrier composite packaging material with a smooth and continuous printing surface

A technology of composite packaging materials and pigments and fillers, which is applied in packaging, wrapping paper, wrapping paper, etc., can solve the problems of insufficient adhesion of thermoplastic resin layers, and achieve the effects of improving adhesion, increasing loss, and reducing production efficiency

Active Publication Date: 2021-08-13
QINGDAO RONGXIN IND & TRADE CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] The purpose of the present invention is to provide a composite packaging material with a smooth and continuous printing surface, so that the printing layer can form a smoother and smoother printing surface without affecting the foaming effect of the foam composite paper and the basic heat insulation and anti-scalding functions. It also solves the problem of insufficient adhesion between the coating layer and the thermoplastic resin layer of the coated paper

Method used

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  • A heat-insulating, non-slip and high-barrier composite packaging material with a smooth and continuous printing surface
  • A heat-insulating, non-slip and high-barrier composite packaging material with a smooth and continuous printing surface
  • A heat-insulating, non-slip and high-barrier composite packaging material with a smooth and continuous printing surface

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] like figure 1 and figure 2 As shown, the foamed composite paper prepared in this example includes a first layer of barrier layer 1 composed of medium density polyethylene MDPE, a second layer of food-grade packaging paper layer 2, and the third layer composed of low density polyethylene LDPE The foam layer 3, the fourth layer is a coating layer 4 composed of coating latex, and the coating latex is coated on the outside of the third layer foam layer 3 by a gravure process.

[0031] In order to overcome the problems of the previously used acrylate polymers, the applicant first selected an acrylate polymer emulsion with a lower glass transition temperature, and selected an 88% water-based acrylate emulsion with a glass transition temperature of -10°C. The coating latex used in the cloth layer also includes 1% defoamer, 8% titanium oxide (particle size 5-20μm), 2% isocyanate curing agent, 1‰ leveling agent, 2‰ wetting agent, and 7‰ dispersant. The above components are ad...

Embodiment 2

[0036] The prepared foamed composite packaging material includes the first layer of barrier layer 1 composed of medium density polyethylene MDPE, the second layer of food grade packaging paper layer 2, and the third layer of foam layer 3 composed of low density polyethylene LDPE ,

[0037] Among them, the medium density polyethylene MDPE is 12-28 g / m 2 , food-grade packaging paper selection 160-350 g / m 2 Paper for packaging materials; low-density polyethylene LDPE layer is 15-45 g / m 2 ;

[0038] The fourth layer is a coating layer 4 made of coated latex, and the coating layer 4 is coated on the outside of the third foaming layer 3 by using a gravure printing process. The coating layer used in the present embodiment selects water-based polyurethane emulsion with a lower glass transition temperature, wherein coating layer 4 comprises 88% of aqueous polyurethane emulsion, defoamer 8‰, titanium oxide (5-20 μm in particle size) 9%, Isocyanate curing agent 1%, leveling agent 1...

Embodiment 3

[0052] The barrier layer 1 composed of the first layer of medium density polyethylene MDPE, the second layer of food grade packaging paper layer 2, and the third layer of foam layer 3 composed of low density polyethylene LDPE are consistent with embodiment 2, and the present embodiment uses The composition of the coating latex is as follows: water-based polyurethane emulsion 88%, defoamer 8‰, titanium oxide (particle size 5-20 μm) 9%, leveling agent 2‰, wetting agent 5‰, dispersant 1.5%; Add it to the dispersion stirring tank, stir and disperse evenly at 25-35°C, with a rotation speed of 1000r / min to form a coated latex. The coated latex is used to prepare a heat-insulating, non-slip and high-barrier compound with a smooth and continuous printing surface. Packaging Materials;

[0053] Its specific preparation method is: use the food-grade packaging laminating paper of 19.5+250+39 g / m2 composed of foam layer 3, food-grade packaging paper layer 2 and barrier layer 1 as the base ...

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Abstract

The invention provides a composite packaging material with a smooth and continuous printing surface. From the inside to the outside, the first barrier layer is a medium-density polyethylene MDPE layer, the second layer is food-grade packaging paper, and the third layer is a foam layer. The low-density polyethylene LDPE layer is also coated with latex on the outside of the third foam layer low-density polyethylene LDPE layer, and the latex coating contains 50-90% water-based polyurethane emulsion, 5 ‰‑1% defoamer, 5%‑43% white pigment, 0‑3% curing agent, 0.1‰‑5‰ leveling agent, 0.5‰‑5‰ wetting agent, 5‰‑5‰ 2% dispersant. The composite packaging material of the present invention enables the printing layer to form a smoother and smoother printing plane without affecting the foaming effect of the foamed composite paper and the basic heat insulation and anti-scalding functions, and also solves the problem of the coating layer and the coated paper thermoplastic resin The problem of insufficient layer adhesion.

Description

technical field [0001] The invention belongs to the technical field of food-grade packaging materials, and in particular relates to a composite packaging material with thermal insulation, slip resistance and high barrier properties with a smooth continuous printing surface. Background technique [0002] In addition to protecting food, preventing damage from external factors and maintaining the stable quality of food itself, food packaging materials can effectively attract consumers if they have a good printing effect after printing, and have value other than material cost. . In the field of food packaging materials, some liquid foods require packaging materials with waterproof, oil-proof, heat-sealing and thermal insulation functions, such as instant noodles, cold drinks and hot drinks. Coated paper is widely used in the current market for this type of food packaging needs. The so-called coated paper is a composite material that processes plastic particles such as polyethyl...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B32B27/10B32B27/32B32B29/00B32B33/00C09D175/04C09D7/61D21H27/10D21H27/30
CPCB32B5/18B32B27/10B32B27/32B32B29/007B32B33/00B32B2255/102B32B2255/26B32B2266/0221B32B2307/304B32B2307/31B32B2307/7265B32B2439/70C08J2323/06C08J2475/04C08K2003/2237C09D175/04C09D7/61C08K3/22
Inventor 姜群张春刚
Owner QINGDAO RONGXIN IND & TRADE CO LTD
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