Method for producing sealing cushion for selenium-coated drum powdered ink

A sealing gasket and toner cartridge technology, which is applied to equipment, chemical instruments and methods, and electrical recording process applying charge patterns, etc., can solve the dimensional changes of polytetrafluoroethylene and sponge and affect product accuracy. and mechanical properties, the sealing function of the gasket is reduced, etc., to achieve the effect of small elastic deformation, excellent stable dimensional stability, and improved sealing effect.

Active Publication Date: 2008-01-02
SHENZHEN FANCY CREATION INDAL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This method has the following problems: 1). The hot melt adhesive between the polytetrafluoroethylene needled felt and the sponge will form a thicker solidified layer in the thermocompression molding process, which will reduce the elasticity of the gasket and make the gasket 2). During the thermoforming process, the mechanical properties of the sponge will decrease due to the temperature increase of the PTFE needle felt and the sponge, and the external force applied at high temperature will cause the size of the PTFE and the sponge to change.
Due to the damage of the mechanical properties of the sponge in the thermoforming process of the gasket made by the existing method, and after being placed for a period of time before use, it will recover elastic deformation, which will cause the longitudinal dimension of the gasket to become larger and the width of the sponge in the transverse direction The size is larger than that of PTFE felt, which affects product accuracy and mechanical properties

Method used

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  • Method for producing sealing cushion for selenium-coated drum powdered ink

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0012] At room temperature, the sponge sheet is die-cut into a U-shaped sponge sheet of the size of a seal gasket for a toner cartridge using a processing device equipped with a U-shaped mold, and a commercially available PTFE needle-punched felt is die-cut into a The sponge sheet is the same size as the U-shaped sheet. Then the sponge sheet is pasted on the polytetrafluoroethylene felt sheet with a stronger adhesive. After removing excess adhesive, a sealing gasket for toner cartridges can be obtained.

[0013] The structural schematic diagram of the product of this embodiment is shown in Figure 1. A sealing gasket for toner cartridges, consisting of three layers of materials, in order from the inside to the outside, are polytetrafluoroethylene felt 1, adhesive 2 and sponge 3, the adhesive 2 is mainly composed of polytetrafluoroethylene felt 1 The effect of bonding to the sponge 3.

[0014] In this embodiment, die-cut the sponge sheet to the specified size at room temperat...

Embodiment 2

[0016] At room temperature, the vulcanized silicone rubber sheet was die-cut into a silicone rubber sheet of the size of a seal gasket for a toner cartridge, and a commercially available polytetrafluoroethylene felt was die-cut into a sheet of the same size as the silicone rubber sheet. Then, the silicone rubber sheet is pasted on the polytetrafluoroethylene felt sheet with an adhesive with strong adhesive performance. The excess adhesive is removed to obtain a sealing gasket for the toner cartridge of the toner cartridge. The die-cutting apparatus of this embodiment is the same as that of Embodiment 1, and the structure of its product is the same as that of Embodiment 1.

[0017] Silicone rubber has excellent aging resistance, air tightness and high temperature resistance. The sealing pad of this embodiment adopts silicon rubber as one of the materials, which is beneficial to improve the aging resistance and high temperature resistance of the sealing pad, so that the printer...

Embodiment 3

[0019] Continuously expanded polystyrene sheets were die-cut at room temperature into styrofoam sheets the size of toner cartridge gaskets, and commercially available PTFE needle felt was die-cut to match the polystyrene foam. Styrofoam sheets are sheets of the same size. Then stick the foamed polystyrene sheet on the polytetrafluoroethylene felt sheet with a double-sided adhesive tape with strong adhesive performance, so as to obtain a sealing gasket for the toner cartridge of the toner cartridge. The die-cutting device and its product structure of this embodiment are the same as those of Embodiment 1.

[0020] Polystyrene foamed plastic has excellent shock resistance and good mechanical properties, so that the sealing gasket for the toner cartridge and toner cartridge using it as one of the materials has good sealing and shock resistance.

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PUM

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Abstract

The invention relates to a preparing method of sealing plate used in selenium drag cartridge, firstly the elastic piece and Teflon blanketing film are cut into size needed by sealing plate, then two are agglutinated by adhesives. The invention leaves out working procedure that current technique heating-up and force make sponge and Teflon blanketing solidified to an integer, overcomes defects that shape of elastic material is changed and performance is decreased under high temperature, and shape of elastic material is recovered under low temperature to affect precision of product, it possesses advantages that size is stable, airproof performance is well. The invention can be widely used in preparing field of selenium drag cartridge sealing plate.

Description

【Technical field】 [0001] The invention belongs to the field of office consumables, and in particular relates to a preparation method of a sealing gasket for office consumables. 【Background technique】 [0002] Polytetrafluoroethylene has been widely used in the field of drag reduction due to its excellent chemical corrosion resistance, aging resistance and small friction coefficient. For example, in the field of office consumables, both sides of the magnetic roller of the toner cartridge of laser copiers and printers are usually sealed with a gasket made of PTFE needle felt and elastic material such as sponge to prevent the toner in the toner cartridge from leaking. At present, the production of the gasket is generally to use double-sided adhesive or hot-melt adhesive to bond the PTFE needle-punched felt and the sponge together, and then place it under high temperature by hot molding to make the PTFE needle-punched. The felt and the sponge are fixed into one body, and at the...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G03G15/08B32B37/12B32B38/04B32B5/24B32B7/10C09K3/10
Inventor 李绍昌朱华
Owner SHENZHEN FANCY CREATION INDAL
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