阅读说明：本技术 一种盛装冷饮用的环保淋膜纸 (Environment-friendly laminating paper for containing cold drinks ) 是由 陈建忠 黄志彬 于 2019-09-26 设计创作，主要内容包括：本发明公开了一种盛装冷饮用的环保淋膜纸,由食品级原纸作为基层,基层内侧面淋膜可降解树脂,基层外侧面具有防水阻隔涂层。本发明外侧面具有防水阻隔涂层,不仅能提高淋膜纸的强度和韧性,又能有效进行防水阻隔,阻延冷凝水珠入侵纸张,大大延长容器的使用寿命,且相对于双面淋膜PLA,成本大大降低。(The invention discloses environment-friendly laminating paper for containing cold drinks. The outer side surface of the invention is provided with the waterproof barrier coating, which not only can improve the strength and toughness of the film coated paper, but also can effectively carry out waterproof barrier, delay the invasion of condensed water drops into the paper, greatly prolong the service life of the container, and greatly reduce the cost compared with the double-sided film coated PLA.)

1. The environment-friendly laminating paper for cold drink is characterized in that food-grade base paper is used as a base layer, degradable resin is laminated on the inner side surface of the base layer, and a waterproof barrier coating is arranged on the outer side surface of the base layer.

2. The environment-friendly laminating paper for containing cold drinks according to claim 1, characterized in that: the waterproof barrier coating is formed by coating polyolefin resin aqueous dispersion, and the particle size of the polyolefin resin aqueous dispersion is less than 1 micron; the solid content of the polyolefin resin aqueous dispersion is 35-40%.

3. The environmental-friendly laminating paper for containing cold drinks according to claim 1 or 2, which is characterized in thatCharacterized in that: the coating amount of the waterproof barrier coating is 0.5-15g/m on a dry basis²。

4. The environment-friendly laminating paper for containing cold drinks according to claim 3, characterized in that: the coating amount of the waterproof barrier coating is 4-6g/m on a dry basis²。

5. The environment-friendly laminating paper for containing cold drinks according to claim 1, characterized in that: and after the patterns are printed on the outer side surface of the base layer, a waterproof barrier coating is coated.

6. The environment-friendly laminating paper for containing cold drinks according to claim 1, characterized in that: the paper quantitative amount of the food-grade base paper is 120-400g/m²And the thickness is 150-600 μm.

7. The environment-friendly laminating paper for containing cold drinks according to claim 1, characterized in that: the degradable resin is PLA, and the gram weight of the PLA drenches the film is 15-50g/m²。

8. The environment-friendly laminating paper for containing cold drinks according to claim 7, wherein the laminating paper comprises: the gram weight of the PLA drenches the membrane is 28-32g/m²。

9. The environment-friendly laminating paper for containing cold drinks according to claim 1, characterized in that: the degradable resin is PBS, and the gram weight of the PBS laminated film is 10-30g/m²。

10. The environment-friendly laminating paper for containing cold drinks according to claim 9, wherein the laminating paper comprises: the gram weight of the PBS laminated film is 16-18g/m²。

Technical Field

The invention relates to the technical field of disposable paper container production, in particular to environment-friendly laminating paper for containing cold drinks.

Background

With the rapid convergence of living joints, the demand of people in all countries in the world for disposable paper containers is increasing. The existing paper container mostly uses PE (polyethylene) laminating paper as a raw material, wherein the PE material is difficult to naturally degrade, cancerogenic substances, namely dioxin, are generated by burning, and thick smoke and irritant toxic and harmful gases generated by burning pollute the atmosphere and seriously pollute the environment.

PLA resin gradually replaces PE resin and is accepted by all countries in the world. Single-side PLA laminated paper containers are mostly available in single markets.

In single-sided PLA film-coated paper containers such as paper cups, paper bowls and paper lunch boxes for containing cold drinks, water drops are often condensed on the outer side of the containers and permeate into the base paper, so that the paper containers become soft and the strength is reduced. Chinese patent CN 208647363U proposes a method for manufacturing paper tableware by using double-sided PLA (Poly lactic acid) coated paper to replace the traditional double-sided PE (Poly ethylene) coated paper. The double-sided laminating PLA resin is high in price and is not accepted by the market.

Disclosure of Invention

The invention aims to overcome the defects that the existing single-sided PLA (polylactic acid) film coated paper container for containing condensed water beads on the surface of a cold drink is soft, the strength is reduced, the cost of the double-sided PLA film coated paper is high and the like, and provides the environment-friendly film coated paper for containing cold drink, wherein the outer side surface of the environment-friendly film coated paper is provided with a waterproof barrier coating, so that the strength and the toughness of the film coated paper can be improved, the waterproof barrier can be effectively carried out, the condensed water beads are prevented from invading the paper, the service life of the container is greatly prolonged, and the cost is greatly reduced compared with the double.

The technical scheme adopted by the invention for solving the technical problems is as follows:

the utility model provides a splendid attire cold drink's environmental protection drenches membrane paper, is regarded as the basic unit by food level body paper, and the inboard side of basic unit drenches membrane degradable resin, and the basic unit lateral surface has waterproof separation coating.

The outer side surface of the base layer is coated with the waterproof barrier coating mainly composed of the specific micro-particle polyolefin aqueous dispersion, the particle size is less than 1 mu m, and the waterproof barrier coating can be uniformly and densely distributed on the surface of the base layer to form a waterproof layer, so that the waterproof performance of the surface of the food-grade base paper is improved; and the water-based dispersion of the particulate polyolefin has small molecular weight, is made of non-high molecular plastic materials, and the waterproof barrier coating is crushed along with paper pulp in the recycling process, so that the waterproof barrier coating can be easily separated in the cleaning and dust removing stage, the recycling process is more convenient and more convenient, and the environment-friendly effect is facilitated.

The inner side surface of the base layer is coated with the degradable resin, so that the degradable resin can be completely degraded, and the environment-friendly concept of the current society is met.

The waterproof barrier coating is formed by coating polyolefin resin aqueous dispersion, and the particle size of the polyolefin resin aqueous dispersion is less than 1 micron; the solid content of the polyolefin resin aqueous dispersion is 35-40%.

The coating amount of the waterproof barrier coating is 0.5-15g/m on a dry basis²。

The coating amount of the waterproof barrier coating is 4-6g/m on a dry basis²。

And after the patterns are printed on the outer side surface of the base layer, a waterproof barrier coating is coated.

The paper quantitative amount of the food-grade base paper is 120-400g/m²And the thickness is 150-600 μm.

The degradable resin is PLA, and the gram weight of the PLA drenches the film is 15-50g/m²。

The gram weight of the PLA drenches the membrane is 28-32g/m²。

The degradable resin is PBS (poly butylene succinate), and the gram weight of the PBS laminated film is 10-30g/m²。

The gram weight of the PBS laminated film is 16-18g/m²。

The invention has the beneficial effects that: the outer side surface of the invention is provided with the waterproof barrier coating, which not only can improve the strength and toughness of the film coated paper, but also can effectively perform waterproof barrier, delay the invasion of condensed water drops into the paper and greatly prolong the service life of the container, and compared with the double-sided film coated PLA, the cost is greatly reduced by about 10 percent.

Drawings

FIG. 1 is a schematic diagram of a hierarchical structure of the present invention.

Detailed Description

The technical solution of the present invention will be further specifically described below by way of specific examples.

In the present invention, the raw materials and equipment used are commercially available or commonly used in the art, unless otherwise specified. The methods in the following examples are conventional in the art unless otherwise specified.

Selecting food-grade base cup paper of Zhejiang five-star paper industry CoThe amount is 300g/m²And the thickness is 300 mu m. PLA particles from Natureworks, USA, with a mark of 2003D, were selected. PBS, commercially available, Japan Showa. The polyolefin resin aqueous dispersion was purchased from mitsui chemical, model S300, 35% solids, 400mPas viscosity, 0.5 μm particle size.