Oil-proof wrapping paper and preparation method thereof

A technology of wrapping paper and oil-proof paper, which is applied in the direction of wrapping paper, wrapping paper, packaging, etc., can solve the problems of oil-proof food wrapping paper not being environmentally friendly, high amount of oil-proof agent used, and low product strength, so as to improve product grade and Effect of adding value, improving surface oil repellency, and improving internal oil repellency

Active Publication Date: 2019-04-26
ZHEJIANG HENGDA NEW MATERIAL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] In order to solve the problems in the prior art that oil-proof food wrapping paper is not environmentally friendly, low in safety, high in oil-proofing agent us

Method used

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  • Oil-proof wrapping paper and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0043] Example 1

[0044] The method for preparing oil-proof packaging paper of this embodiment includes the following steps:

[0045] (1) Preparation of oil-proof plant microfibrils

[0046] At room temperature, add 50kg of fluorobenzoyl chloride, 50kg of dimethylformamide, and 50kg of plant fiber microfibrils into the reactor successively, stir and mix evenly, heat to 70°C, and stir for 2h at 70°C; react; After the end, cool to room temperature, filter the product to remove excess solvent, and then wash with dichloromethane twice, then with ethanol twice, take it out after washing, and dry at 60°C for 24h to obtain oil-proof vegetable microfiber Silk; wherein: the diameter of the plant fiber microfibrils is 5-10um, and the length is 200-400um.

[0047] (2) A method for preparing oil-resistant (modified) nano cellulose, the method includes the following steps:

[0048] At room temperature, sequentially add 1000g of fluorobenzoyl chloride, 750g of dimethylformamide, and 250g of nano-c...

Example Embodiment

[0056] Example 2

[0057] The method for preparing oil-proof packaging paper of this embodiment includes the following steps:

[0058] (1) Preparation of oil-proof plant microfibrils

[0059] At room temperature, sequentially add 25kg fluorobenzoyl chloride, 50kg dimethylformamide, and 50kg plant fiber microfibrils into the reactor, stir and mix evenly, heat to 80°C, and stir at 80°C for 1h reaction; After finishing, cool to room temperature, filter the product to remove excess solvent, then wash 4 times with dichloromethane, and 4 times with ethanol. After washing, take it out and dry it at 60℃ for 24h to obtain oil-proof vegetable microfiber Silk; wherein: the diameter of the plant fiber microfibrils is 5-10um, and the length is 200-400um.

[0060] (2) Preparation of oil-proof nano cellulose

[0061] At room temperature, 500g of fluorobenzoyl chloride, 500g of dimethylformamide, and 250g of nano-cellulose crystals were added to the reactor in turn, stirred and mixed uniformly, heate...

Example Embodiment

[0069] Example 3

[0070] The preparation method of oil-proof packaging paper of this embodiment includes the following steps:

[0071] (1) Preparation of oil-proof plant microfibrils

[0072] At room temperature, sequentially add 50kg of fluorobenzoyl chloride, 100kg of dimethylformamide, and 50kg of plant fiber microfibrils into the reactor, stir and mix evenly, heat to 75°C, and stir for 1.5h at 75°C; After the reaction, cool to room temperature, filter the product, remove excess solvent, and then wash 5 times with dichloromethane, then 5 times with ethanol, take out and dry at 60°C for 24 hours to obtain oil-proof plant microfibrils; : The plant fiber microfibrils have a diameter of 5-10um and a length of 200-400um.

[0073] (2) Preparation of oil-proof nano cellulose

[0074] At room temperature, 750g of fluorobenzoyl chloride, 500g of dimethylformamide, and 250g of nano-cellulose crystals were sequentially added to the reactor, stirred and mixed uniformly, heated to 80°C, and st...

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Abstract

The invention relates to oil-proof wrapping paper and a preparation method thereof and belongs to the technical field of food wrapping paper. According to the invention, a double oil-proof technologyis adopted, fluorobenzoyl chloride, dimethyl formamide and plant fiber microfilaments are mixed according to a certain proportion, oil-proof plant fiber microfilaments are prepared under certain reaction conditions, nanometer celluloses are subjected to fluorine-containing modification preparation by using the same method, and the double oil-proof wrapping paper is prepared by paper-making and surface application. The oil-proof wrapping paper and the preparation method thereof provided by the invention have the beneficial effects that the interior oil-proof performance and the surface oil-proof performance of the oil-proof wrapping paper are improved, and through double oil-proof treatment on the interior and the surface of pulp, the product achieves high oil-proof performance; in addition, the oil-proof wrapping paper is good in oil-proof performance, enhancement performance and barrier performance, so that the product grade and the value added are improved; moreover, the oil-proof wrapping paper prepared by the preparation method provided by the invention needs not be coated or waxed, so that the environmental protection performance, the safety, the oil-proof efficiency and the strength of the oil-proof wrapping paper are improved, and the application range is expanded.

Description

technical field [0001] The invention belongs to the technical field of food wrapping paper, and in particular relates to an oil-proof wrapping paper and a preparation method thereof. Background technique [0002] The environmental protection and safety of oil-containing food packaging materials have always been a concern of the government, the public and technical personnel in related fields. In recent years, the rapid development of the fast-moving food market has driven the development of oil-containing food packaging materials. Oil-proof wrapping paper is one of the most commonly used oil-containing food packaging materials. Ordinary oil-proof wrapping paper is usually coated with wax or coated on the surface of the paper to improve the oil-resistant performance of the paper. However, whether it is safe to apply wax or film on the surface of fast-moving food oil-proof packaging paper is also a concern of the government, the public and technical personnel in related fields...

Claims

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Application Information

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IPC IPC(8): D21H27/10D21H15/10D21H11/00D21H13/00D21H21/14D21H19/34D21H19/14D21H21/16
CPCD21H11/00D21H13/00D21H15/10D21H19/14D21H19/34D21H21/14D21H21/16D21H27/10
Inventor 伊财富赵新民杨菊红江利王启华程亚洲丁济正吕江华廖寿华
Owner ZHEJIANG HENGDA NEW MATERIAL CO LTD
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