Low-voltage low-loss electrolytic capacitor paper and preparation method and application thereof

An electrolytic capacitor paper, low-loss technology, applied in the field of low-voltage low-loss electrolytic capacitor paper and its preparation, can solve the problems of weakening the fiber bonding force in the wet paper web, poor fiber fiber bonding force, and short circuit of the electrolytic capacitor, so as to improve the quality of the paper Strength, good absorption, and the effect of reducing the short circuit rate

Active Publication Date: 2022-04-01
浙江凯恩新材料有限公司 +2
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  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

[0005] For example, Chinese invention patent CN100373002C discloses a low-tightness electrolytic capacitor paper, which uses aramid fiber and biological cellulose fiber as raw materials. Acid chloride is used in the preparation process of aramid fiber, which leads to the chloride ion content of the prepared aramid fiber is much higher than the requirements of electrolytic capacitor paper, and it will corrode aluminum foil during use, which is harmful to capacitors. has a great influence on the service life of
[0006] For example, Chinese invention patent CN108221487B discloses a low internal resistance super electrolytic capacitor paper and its preparation method, which uses Tencel fiber and superfine polyester fiber as raw materials , prepared by wet papermaking process. Tencel fiber is different from conventional plant fiber. When the tencel beating degree is high, the fiber is shorter and the bonding force between fibers is poor. The tencel fiber and ultrafine polyester fiber are mixed for papermaking. It also weakens the bonding force of fibers in the wet paper web, causing the wet paper web to easily stick to the net during the transfer process, forming holes and other paper defects; at the same time, due to the addition of ultra-fine polyester fibers, the fibers are small in diameter and long in lengt

Method used

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  • Low-voltage low-loss electrolytic capacitor paper and preparation method and application thereof
  • Low-voltage low-loss electrolytic capacitor paper and preparation method and application thereof
  • Low-voltage low-loss electrolytic capacitor paper and preparation method and application thereof

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example 2

[0047] The beating degree of sisal pulp is 25°SR, the beating specific energy is 200kW*h / t, the tencel fiber is soaked for 24 hours and then beating, the beating degree is 50°SR, the beating specific energy is 60kW*h / t, the sisal pulp and tencel The fibers are mixed according to the absolute dry weight of 50% and 50% respectively, and sent to the paper machine papermaking system, and 0.05% of the total dry weight of the raw materials is added to the batching box of the paper machine flow delivery system. Non-ionic polyacrylamide solution , using inclined wire paper machine papermaking, papermaking process according to the conventional process.

[0048] Reference example 3

[0049] The beating degree of sisal pulp is 25°SR, the beating specific energy is 200kW*h / t, the specification of polypropylene fiber is 1.0dtex*5mm, the polypropylene fiber is stirred and dispersed for 40 minutes, and then filtered through a 60-mesh filter, and then added again Ionized water is configured ...

example 4

[0051] Tencel fibers are soaked for 24 hours and then beaten, the degree of beating is 50°SR, the specific energy of beating is 60kW*h / t, the specification of polypropylene fibers is 1.0dtex*5mm, the polypropylene fibers are stirred and dispersed for 40 minutes, and then filtered through a 60-mesh filter. After filtering, deionized water is added to form a fiber suspension with a concentration of 0.1% to 1.0%. The tencel pulp and polypropylene fiber are mixed at 50% and 50% by absolute dry weight and sent to the paper machine papermaking system. Add non-ionic polyacrylamide solution of 0.05% relative to the dry weight of the raw materials in the batching box of the paper machine flow delivery system, and use an inclined wire paper machine for papermaking. The base paper obtained by papermaking is shaped by a sizing machine, and the surface temperature of the sizing dryer is 240 ℃, setting speed 100m / min, setting once.

Embodiment 1

[0053] The beating degree of sisal pulp is 25°SR, the beating specific energy is 200kW*h / t, the tencel fiber is soaked for 24 hours and then beating, the beating degree is 50°SR, the beating specific energy is 60kW*h / t, and the specification of polypropylene fiber is 1.0dtex *5mm, polypropylene fibers were stirred and dispersed for 40 minutes, and then filtered through a 60-mesh filter. After filtration, deionized water was added to make a fiber suspension with a concentration of 0.1% to 1.0%. Sisal pulp, tencel fibers and polypropylene The fibers are mixed and sent to the paper machine papermaking system according to the dry weight ratio of 60%, 30%, and 10%, and 0.05% of the total dry weight of the raw materials is added to the batching box of the paper machine. The acrylamide solution is made by inclined wire paper machine, and the base paper obtained by papermaking is shaped by a setting machine. The surface temperature of the setting drying cylinder is 240°C, the setting s...

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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Abstract

The invention relates to the technical field of aluminum electrolytic capacitor paper new materials, in particular to low-voltage low-loss electrolytic capacitor paper and a preparation method and application thereof. The invention relates to low-voltage low-loss electrolytic capacitor paper, which is prepared from the following fiber raw materials in percentage by mass: 30 to 60 percent of hemp pulp, 20 to 50 percent of tencel pulp and 10 to 50 percent of polyolefin short fiber, the beating degree of the hemp pulp is 15-50 degrees SR; the beating degree of the hemp pulp is 40-70 degrees SR, the beating degree of the tencel pulp is 40-70 degrees SR, the hemp pulp, the tencel pulp and the polyolefin short fibers are uniformly mixed and then fed into a paper machine drifting system, then wet-process papermaking forming is performed to obtain raw paper, and the raw paper is shaped by adopting a shaping drying cylinder to obtain a finished product of the low-voltage and low-loss electrolytic capacitor paper. The product has good absorptivity, relatively low aperture and relatively high strength, the used raw materials are high in purity, the high purity of the electrolytic paper can be effectively ensured, and the risk of aluminum foil corrosion is avoided.

Description

technical field [0001] The invention relates to the technical field of new materials for aluminum electrolytic capacitor paper, in particular to a low-voltage low-loss electrolytic capacitor paper and its preparation method and application. Background technique [0002] Electrolytic capacitors are one of the important components in the electronics industry. In addition to the functions of filtering, decoupling and signal coupling in the circuit, they also play a special role in special circuits such as rectification circuits, power circuits and AC motor starting circuits. Widely used in the automotive industry, security industry, medical electronics, computer TV, electronic toys and industrial control and other fields. [0003] Electrolytic capacitor paper mainly plays the role of isolating positive and negative electrodes and absorbing electrolyte in electrolytic capacitors. According to the requirements of use, it can be divided into high-voltage electrolytic paper and low...

Claims

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Application Information

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IPC IPC(8): D21H27/00D21H11/12D21H13/14D21H15/02D21H13/08H01G9/02
Inventor 李南华左磊刚张文超何江张必强郭婉汪金佩
Owner 浙江凯恩新材料有限公司
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