Composite paper

A composite paper and paper layer technology, applied to composite paper. It can solve the problems of leaving paper scraps, low strength and poor natural texture, and achieve the effect of good wet strength, safety and comfort.

Inactive Publication Date: 2015-03-11
SHANGHAI HULIJIA IND
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  • Application Information

AI Technical Summary

Problems solved by technology

However, the strength of household paper is very low when it is wet, usually below 1.5N / 15mm
This kind of household paper often breaks and leaves paper scraps when used. To increase the moisture resistance strength, it is necessary to add a lot of chemical wet strength agents when making paper, which brings safety risks to consumers.
[0004] Common disposable hygiene products, such as wet wipes, sanitary napkins, diapers, panty liners, etc., generally use non-woven fabrics as the surface layer. Due to the large proportion of synthetic fibers or chemical fibers, the natural texture is poor, and catalysts often remain , reactive monomers, chemical oils and other trace chemical substances, bringing potential safety risks to consumers

Method used

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Examples

Experimental program
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preparation example Construction

[0033] The present invention has no special limitation on the preparation method of the composite paper, which may be hot pressing method or ultrasonic method. The hot pressing method includes the following steps: stacking the paper layer and the reinforcement layer up and down to form a group, pressing rollers, forming bonding lines on the surface of the paper layer and the reinforcement layer by heating and pressing, so that the paper layer and the reinforcement layer are connected together .

[0034] The ultrasonic method includes the following steps: stack the paper layer and the reinforcing layer, use an ultrasonic generator to form ultrasonic waves in the area to be bonded, and under the action of the ultrasonic waves, the paper layer and the reinforcing layer will oscillate at high frequency to form a bonding pattern, and connect the Together.

[0035] Experimental results show that the wet breaking strength of the composite paper of the invention is greater than 3N / 15...

Embodiment 1

[0038] A composite paper is obtained by heating and pressing one layer of paper and one layer of reinforcing layer. The reinforcing layer is air-through non-woven fabric.

[0039] figure 1 A schematic cross-sectional view of the composite paper prepared for Example 1. figure 1 Among them, (1) is the paper layer, (2) is the reinforcement layer, and (3) is the single-side bonding grain.

[0040] The wet breaking strength of the obtained composite paper was measured, and the results showed that the wet breaking strength was 3.1N / 15mm.

Embodiment 2

[0042] The first paper layer, the reinforcement layer, and the second paper layer are stacked in sequence, and subjected to ultrasonic vibration to obtain a composite paper with single-side bonded grain. The reinforcement layer is a polyethylene film.

[0043] figure 1 Schematic cross-sectional view of the composite paper prepared for Example 2. figure 2 Among them, (1) is the first paper layer, (2) is the reinforcement layer, (3) is the second paper layer, and (4) is the single-sided bonding grain.

[0044] The wet breaking strength of the obtained composite paper was measured, and the results showed that the wet breaking strength was 3.3N / 15mm.

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Abstract

The invention provides composite paper which comprises one or more paper layers and one or more strengthening layers, wherein the paper layers and the strengthening layers are connected through combining patterns; the paper layers are not connected with each other; at least one surface of the composite paper is the paper layer; the strengthening layers are non-woven fabric or plastic films. According to the invention, as the strengthening layers achieve higher strength after being wetted, so that after the strengthening layers are composited with the paper layers, the composite paper has better wetting strength, and avoids the problems of cracks and paper scrap residues when being wetted; besides, at least one surface of the composite paper is the paper layer, so that after the composite paper is in contact with the human body, the comfort and safety of the human body are guaranteed.

Description

technical field [0001] The invention relates to the field of paper production, in particular to a composite paper. Background technique [0002] With the development of the economy and the improvement of people's living standards, people's demand for household paper and disposable hygiene products is increasing. [0003] Household paper refers to all kinds of sanitary wiping paper used to take care of personal homes and going out, including roll toilet paper, removable toilet paper, boxed facial tissue, pocket facial tissue, handkerchief paper, napkin paper, kitchen paper, wet wipes , shoe shine paper, toilet paper, etc. Since tissue paper uses natural cellulose such as wood pulp and bamboo pulp as raw materials, it is more natural and environmentally friendly, and it is more comfortable to use. However, the strength of household paper is very low when it is wet, usually below 1.5N / 15mm. This kind of household paper often breaks and leaves paper scraps when used. If the m...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
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Application Information

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IPC IPC(8): D21H27/38B32B27/10B32B29/02B32B7/04
Inventor 夏双印张维军
Owner SHANGHAI HULIJIA IND
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