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Weighing paper

A technology of surface resistivity and coefficient of static friction, applied in the field of weighing paper, can solve the problems affecting the weighing accuracy of the balance, mass deviation, excessive static electricity, etc., achieve good waterproof and oil-proof effect, reduce weighing error, static friction The effect of small coefficients

Active Publication Date: 2015-01-07
廖张洁
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there is a defect in the commonly used weighing paper, that is, the static electricity is very large. When weighing on a precision balance with an electrostatic alarm device, it will often prompt that the static electricity on the weighing paper is too large
The existence of static electricity will affect the weighing accuracy of the balance, and a small amount of the substance to be weighed will remain on the weighing paper when transferring the substance, resulting in quality deviation
When weighing some very light substances such as nano-powders, these materials will be attracted to the edge of the weighing paper due to the existence of static electricity, and there will be flying powder phenomenon, which will bring unnecessary trouble to the weighing

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] In this example, an antistatic agent is added to the wood pulp, and after beating, it is sliced, pressed, and dried, and the surface is weighed for sizing. The amount of sizing is 1g / m 2 , after being dried into paper, the basis weight of the paper is 40g / m 2 . The static friction coefficient of the weighing surface of the gained weighing paper is 0.25, and the surface resistivity of the back side is 6×10 9 Ω.

[0019] By increasing the content of antistatic agent, the surface resistivity can continue to decrease, so as to achieve 10 8 Ω level and an order of magnitude smaller resistance.

Embodiment 2

[0021] In this example, antistatic agents, film-forming substances, and film-forming aids are added to wood pulp, and after beating, paper is made into sheets, pressed, and dried. The quantitative weight of paper is 25g / m 2 . The static coefficient of friction of the weighing surface of the gained weighing paper is 0.2, and the surface resistivity of the positive and negative sides is all at 10. 8 Ω level, the front and back roughness is 2 microns.

Embodiment 3

[0023] In this embodiment, antistatic agents, film-forming substances, film-forming aids, and oil-repellent agents are added to wood pulp, and after beating, paper is made into sheets, pressed, and dried, and the quantitative weight of the paper is 30g / m 2 . The static coefficient of friction of the weighing surface of the gained weighing paper is 0.15, and the surface resistivity of the positive and negative sides is all at 10. 8 Ω level, the roughness of the weighing surface is 1 micron, and the oil resistance level of the front and back sides is 2.

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Abstract

The invention discloses a piece of weighing paper. The surface resistivity of at least one surface of the weighing paper is not greater than 1010 ohms, the quantity of the paper is 25-45 g / m<2>, and the static friction coefficient of the surface for weighing is not greater than 0.25. The surface resistivity can be further reduced by increasing antistatic components, and due to reduction of the surface resistivity, the possibility of powder flying can be effectively reduced when nano-powder is weighed. Meanwhile, substances like nano-powder can be transferred from the surfaces of the weighing paper smoothly by controlling the surface roughness and the static friction coefficient of the weighing paper.

Description

technical field [0001] The invention relates to a weighing paper, in particular to a weighing paper with antistatic function. Background technique [0002] Weighing paper is often used in scientific experiments. It is used as a weighing carrier. After weighing, the material to be weighed can be transferred conveniently. It is more commonly used for weighing solid powder materials. However, there is a defect in the commonly used weighing paper, that is, the static electricity is very large. When weighing on a precision balance with a built-in static alarm device, it will often prompt that the static electricity carried by the weighing paper is too large. The existence of static electricity will affect the weighing accuracy of the balance, and a small amount of the substance to be weighed will remain on the weighing paper when the substance is transferred, resulting in mass deviation. When weighing some very light substances such as nano-powders, these materials will be sucke...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01G21/22
Inventor 郭宏磊廖张洁
Owner 廖张洁
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