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Transparent anti-stick coating and preparation method thereof

An anti-stick coating, transparent technology, applied in the direction of paper coating, coating, no pigment coating, etc., can solve the problems of high-speed automatic labeling, poor paper release performance, low strength and transparency, etc., to improve peeling. effect, improved transparency, improved strength properties and surface properties

Active Publication Date: 2019-06-07
五洲特种纸业集团股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the glassine paper currently produced in China is inferior to imported products in terms of surface smoothness and oil resistance, which leads to poor paper release performance and requires a high amount of silicon coating on the surface, resulting in increased production costs; The peeling effect is not good, and the required peeling force is relatively large; in addition, the strength and transparency are low, which cannot meet the requirements of high-speed automatic labeling

Method used

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  • Transparent anti-stick coating and preparation method thereof
  • Transparent anti-stick coating and preparation method thereof

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Experimental program
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Effect test

Embodiment 1

[0033] A kind of preparation method of transparent release coating of the present embodiment, described method comprises the steps:

[0034] (1) Preparation of modified nanocellulose

[0035] Under room temperature, 100g pentafluorobenzoyl chloride is joined in closed reactor, then in reactor, add 50g potassium thiocyanate / triethylamine solution (wherein: the mass concentration of potassium thiocyanate in triethylamine is 60%), 20g nanocellulose crystals (wherein: the nanocellulose crystals have a diameter of 10 to 50nm and a length of 150 to 300nm), continuously stirred with a stirrer, and mixed evenly; in a nitrogen atmosphere, the reactor was heated to 90 ℃, and stirred at 90 ℃ for 4 hours, after the reaction, cooled to room temperature, centrifuged the product at 12000r / min for 50min to remove excess solvent, washed the product 6 times with hexane, and washed with ethanol Washing 6 times, and finally centrifuging for 50 minutes to obtain the modified nanocellulose;

[00...

Embodiment 2

[0041] A kind of preparation method of transparent release coating of the present embodiment, described method comprises the steps:

[0042] (1) Preparation of modified nanocellulose

[0043] At room temperature, 100g pentafluorobenzoyl chloride is added in the airtight reactor, then in reactor, add 37.5g potassium thiocyanate / ethylenediamine solution (wherein: the mass concentration of potassium thiocyanate in ethylenediamine 50%), 25g nanocellulose crystals (wherein: the nanocellulose crystals have a diameter of 10-50nm and a length of 150-300nm), continuously stir with a stirrer, and mix evenly; in a nitrogen atmosphere, the reactor is heated to 85°C, and stirred at 85°C for 3.5 hours. After the reaction, cool to room temperature, centrifuge the product at 10000r / min for 50min, remove excess solvent, and wash the product 3 times with hexane. and washed with ethanol for 3 times, and finally centrifuged for 50 min to obtain the modified nanocellulose;

[0044] (2) Preparation...

Embodiment 3

[0049] A kind of preparation method of transparent release coating of the present embodiment, described method comprises the steps:

[0050] (1) Preparation of modified nanocellulose

[0051] Under room temperature, 90g pentafluorobenzoyl chloride is joined in closed reactor, then in reactor, add 40g potassium thiocyanate / triethylamine solution (wherein: the mass concentration of potassium thiocyanate in triethylamine is 60%), 20g nanocellulose crystals (wherein: the nanocellulose crystals have a diameter of 10 to 50nm and a length of 150 to 300nm), continuously stirred with a stirrer, and mixed evenly; in a nitrogen atmosphere, the reactor was heated to 80 ℃, and stirred the reaction at 80℃ for 4h. After the reaction, cooled to room temperature, the obtained product was centrifuged at 12000r / min for 50min to remove excess solvent, and the product was washed 4 times with hexane, and washed with ethanol Washing 4 times, and finally centrifuging for 50 minutes to obtain the mod...

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Abstract

The invention relates to a transparent anti-stick coating and a preparation method thereof, and belongs to the technical field of composite materials. The transparent anti-stick coating comprises modified nanocellulose, carboxymethyl cellulose (CMC) and a styrene-acrylate copolymer according to a mass ratio of 10:(40-60):(40-60), wherein the modified nanocellulose is obtained through the followingsteps: uniformly mixing pentafluorobenzoyl chloride, an organic amine solution of potassium thiocyanate and nanocellulose crystals according to a mass ratio of (4-5):(1.5-2.5):1, heating the obtainedmixture in a nitrogen atmosphere to 80-90 DEG C, stirring and reacting the heated mixture at 80-90 DEG C for 2.5-4 h, centrifuging and concentrating the resulting product to remove the excess solvent, washing the product, and centrifuging the product. A coating layer formed by the coating of the invention has a transparency of 50%, a smoothness of 1550 s and an oil absorptivity of 1 g / m<2>, and has excellent properties such as transverse tear index and tensile index.

Description

technical field [0001] The invention belongs to the technical field of composite materials, and in particular relates to a transparent anti-adhesive coating and a preparation method thereof. Background technique [0002] Natural cellulose is the most abundant biomass resource on earth and the most widely distributed biopolymer in nature. It exists in various organisms such as plants, animals and some bacteria. Nanocellulose crystal (NCC) is a kind of nano-scale cellulose extracted from natural fibers. It is a rigid rod-shaped cellulose with a diameter of 1-100 nm and a length of tens to hundreds of nanometers. Features, also has some unique strength and optical properties, has broad application prospects. [0003] Glassine paper, also known as translucent cellophane, is a special paper with good internal strength and transparency made after coating and processing of Glassine special base paper. It has the functions of high temperature resistance, moisture resistance, oil r...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D21H19/14D21H19/34D21H19/20D21H21/14D21H21/26
Inventor 赵磊黄晔王晓明赵春风
Owner 五洲特种纸业集团股份有限公司