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Microcapsule for carbonless copy paper and preparation method thereof and carbonless copy paper and paint thereof

A technology of carbon-free copy paper and microcapsules, which is applied in the field of papermaking, can solve the problem of thin writing line width, and achieve the effect of improving spreadability and increasing line width

Inactive Publication Date: 2017-11-10
GOLD HUASHENG PAPER SUZHOU IND PARK
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The inventors of this application have discovered in the long-term research and development process that high-end customers at home and abroad have very strict requirements on the width of writing lines on carbonless copy paper, while the existing ordinary carbonless copy paper has the problem of thinner writing lines

Method used

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  • Microcapsule for carbonless copy paper and preparation method thereof and carbonless copy paper and paint thereof
  • Microcapsule for carbonless copy paper and preparation method thereof and carbonless copy paper and paint thereof
  • Microcapsule for carbonless copy paper and preparation method thereof and carbonless copy paper and paint thereof

Examples

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preparation example Construction

[0021] In a specific application scenario, the preparation method of the microcapsules for carbonless copy paper provided by the present invention comprises the following steps:

[0022] A, the leuco dye of 2-10 mass parts (for example 2,5,8,10 mass parts etc.), the solvent naphtha of 20-80 mass parts (for example 20,40,60,80 mass parts etc.) 0.01%-0.5% (for example, 0.01%, 0.1%, 0.2%, 0.3%, 0.4%, 0.5%, etc.) of the oil-based dry mass of the oil-soluble surfactant is mixed evenly to obtain the core material of the microcapsule;

[0023] B. The above-mentioned core material, 2-10 parts by mass (such as 2, 5, 8, 10 parts by mass, etc.) The solvent is mixed evenly for preliminary emulsification to obtain an emulsification system mixture. When the particle diameter of the latex particles in the emulsification system mixture reaches 2-8um (such as 2, 5, 8um), add 6-15 parts by mass (such as 6, 9, 12, 15 parts by mass, etc.) of the wall material, fully stirred to obtain the emulsio...

Embodiment 1

[0030] Embodiment 1 (comparative example)

[0031] A, preparation of microcapsules:

[0032] 3g of leuco dye (commercially available) is dissolved in 70g of mineral spirits under heating and mixed uniformly to obtain a core material;

[0033] Mix the above-mentioned core material, 4.5g polystyrene maleic anhydride emulsifier, and 100g water, and carry out preliminary emulsification to obtain an emulsification system mixture. When the particle size of the latex particles in the emulsification system mixture reaches 4.5um, add 15g of wall material , fully stir into the emulsion;

[0034] The above emulsion is gradually heated up to 65°C-75°C under stirring for curing and molding, and the first pH regulator is added to adjust the pH value of the system to 7.5-10 for storage until use.

[0035] B, prepare carbonless copy paper coating:

[0036] Get the above microcapsules 100g, wheat starch 30g, phosphorylated potato starch 8g, styrene-butadiene latex 3g, polyamide polyurea epi...

Embodiment 2

[0040] The difference between Example 2 and Example 1 is that 0.07 g (accounting for 0.1% of the absolute dry mass of solvent oil) Span-40 was added during the preparation of the microcapsule core material.

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Abstract

The invention discloses a microcapsule for carbonless copy paper and a preparation method thereof and the carbonless copy paper and paint thereof. The microcapsule for the carbonless copy paper is prepared from an oil-soluble interfacial agent. In this way, by the adoption of the microcapsule and the carbonless copy paper, the widths of written lines in the carbonless copy paper can be increased.

Description

technical field [0001] The invention relates to the technical field of papermaking, in particular to a microcapsule for carbonless copy paper and a preparation method thereof, carbonless copy paper and a coating thereof. Background technique [0002] Carbonless copy paper (NCR) is a kind of leuco copy paper, which has the function of direct copying and direct color development, and is mainly used for multipart forms, bills, financial notes, etc. [0003] Such as figure 1 as shown, figure 1 It is a structural schematic diagram of an embodiment of an existing carbonless copy paper. Carbonless copy paper is generally composed of three paper sheets, namely upper paper (CB paper) 101, middle paper (CFB paper) 102 and lower paper (CF paper) 103, the back of the upper paper 101 is coated with microcapsules 104a; The front of the paper 102 is coated with a developer 104b, and the back is coated with a microcapsule 105a; the front of the lower paper 103 is coated with a developer ...

Claims

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Application Information

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IPC IPC(8): D21H21/54D21H19/14B01J13/02
CPCD21H21/54B01J13/02D21H19/14
Inventor 丁力陈汉彬李娟周晶
Owner GOLD HUASHENG PAPER SUZHOU IND PARK
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