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Base paper for total heat exchanger element

A technology for total heat exchangers and components, applied in the field of base paper for total heat exchanger components, can solve problems such as excess moisture absorption, condensation, and equipment rust

Active Publication Date: 2012-10-10
OJI PAPER CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0016] As mentioned above, as a base paper for total heat exchanger elements, it is required to have both fire resistance and high heat exchange efficiency. In order to improve heat exchange efficiency, various hygroscopic agents or a mixture of moisture absorbing and desorbing powders have been studied, but there is still no A method to determine the balance, productivity, cost, etc. between the fire resistance and the fire resistance to be provided in a balanced manner
[0017] That is, the use of commonly used calcium chloride for hygroscopicity and fire resistance tends to rust the equipment (equipment in the manufacturing process of base paper for total heat exchanger elements such as paper machines, calenders, and winding machines, or in the element processing process), In addition, when a large amount of calcium chloride is added to the base paper for the purpose of improving fire resistance, etc., especially in high-temperature and high-humidity environments, excessive moisture absorption will occur, causing condensation and liquid flow.
Therefore, there are many technologies using organic acid salts, inorganic particles, etc. as moisture absorbents other than calcium chloride. However, according to these technologies, in order to impart fire resistance, it is necessary to add a fire retardant separately as a moisture absorbent. There are problems with cost
In addition, as disclosed in Patent Document 9, by increasing the beating of the base paper, the base paper with excellent gas barrier properties can be obtained. However, making the base paper have a high degree of beating will not only reduce the production efficiency during papermaking, but also make the base paper too high. Brittle, which can cause problems when producing components

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0062] 80% bleached kraft pulp from coniferous trees (NBKP) and 20% bleached kraft pulp from deciduous trees (LBKP) were mixed, and beaten in a real machine DDR until the unconventional freeness (0.3g / L pulp usage) became 450ml.

[0063] As internal additives, relative to the quality of wood pulp, 0.5% of absolutely dry polyacrylamide-based paper strength agent (Polystron 117, manufactured by Arakawa Chemical Industry Co., Ltd.), polyamide polyamine epichlorohydrin-based wet paper strength agent (Arafix 255) was added. , manufactured by Arakawa Chemical Industry Co., Ltd.) 0.5%, alum 0.5%.

[0064] The raw materials obtained above were subjected to papermaking operation with a fourdrinier paper machine, and the sizing press liquid 1 described later containing calcium chloride was impregnated with the on-machine sizing press to make it adhere, and the obtained after drying was used as a base paper, and then The base paper was super-calendered to obtain a base paper for componen...

Embodiment 2

[0071] Use the sizing press fluid 2 prepared as follows, and make the calcium chloride adhesion amount 7g / m 2 (Converted to anhydrous calcium chloride), except that, it carried out similarly to Example 1, and produced the base paper for elements.

[0072] [Sizing Press Fluid 2]

[0073] Calcium chloride: 35% (solid content concentration based on anhydrous conversion)

[0074] Antirust agent: 2% (solid content concentration)

[0075] Anti-blocking agent: 0.02% (solid content concentration)

Embodiment 3

[0077] Use the sizing press fluid 3 prepared as follows, and make the calcium chloride adhesion amount 3g / m 2 (Converted to anhydrous calcium chloride), except that, it carried out similarly to Example 1, and produced the base paper for elements.

[0078] [Sizing Press Fluid 3]

[0079] Calcium chloride: 17% (solid content concentration in terms of anhydrous)

[0080] PVA: 1.5% (solid content concentration)

[0081] Antirust agent: 2% (solid content concentration)

[0082] Anti-blocking agent: 0.02% (solid content concentration)

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Abstract

The present invention relates to a base paper used for full-heat exchanger element, and is characterized in that a paper substrate which has a main component of paper pulp. 10 to 25 % by mass calcium chloride is contained in the substrate, and the hydroscopicity is 15 to 30%.

Description

technical field [0001] The present invention relates to a base paper for total heat exchanger elements that performs heat exchange of sensible heat (temperature) and latent heat (humidity) when fresh external air is supplied and indoor turbid air is exhausted. Background technique [0002] In the prior art, as a device that can perform ventilation without destroying the cooling and heating effects, a heat exchange ventilation device (heat exchange ventilation device) that performs heat exchange between intake air and exhaust air during ventilation is proposed. device). [0003] As this heat exchanger, a heat exchanger having a total heat exchanger element (hereinafter also referred to as a component) in which a plurality of partition plates (lining plates) are laminated through spacers and divided into An intake path that brings outside air into the room and an exhaust path that takes room air out of the room. [0004] In an air-to-air (convection) heat exchanger that perf...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): D21H17/66D21H21/14D21H27/00
Inventor 三柴晶子山本真也
Owner OJI PAPER CO LTD