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Photosensitive pad suitable for stamp and its prepn method

A technology for photosensitive pads and stamps, which is applied in the field of microporous foam materials and their preparation, can solve problems such as poor uniformity, large pore size of porous materials, and large investment, and achieve stable product quality, small pore size, and good uniformity.

Inactive Publication Date: 2007-12-12
张志华 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The oil storage stamp material obtained by this method is complicated in process, large in investment (requires low-temperature crushing equipment), large in porous material pore size, poor in uniformity, and unstable in product quality.
The process of making stamps with this material is complicated, and the resolution of the stamps is low

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] 70 parts by mass of polyethylene resin, 5.0 parts by mass of pigment carbon black, 3.0 parts by mass of tetrakis [3-(3'5'-di-tert-butyl-4'-hydroxyphenyl) propylene] pentaerythritol ester (1010 antioxidant) , 3.0 parts by mass of sorbitan monolaurate (Span 20), 5 parts by mass of stearic acid, 8 parts by mass of paraffin wax, 3 parts by mass of polyethylene wax, 2 parts by mass of calcium stearate, 7 parts by mass of paraffin oil , 400 parts by mass of calcium carbonate, mixed uniformly, molded, extruded, injection-molded to obtain the material embryo), the material embryo is immersed in a weight concentration of 1% aqueous hydrochloric acid for washing, calcium carbonate is removed, and a softer microporous photosensitive pad is obtained.

[0037] The size of the micropores is 10 microns, and the micropores are an open structure with an open rate of 95%.

[0038] Using this method to prepare a photosensitive seal, compared with the performance of the Wanshi seal, the re...

Embodiment 2

[0041] 90 parts by mass of polyethylene resin, 0.1 part by mass of pigment carbon black, 0.5 part by mass of 2,4,6-tri-tert-butylphenol (antioxidant 246), fatty alcohol polyoxyethylene (20) ether (Pingping plus O- 20) 0.5 parts by mass, 1 part by mass of stearic acid, 1 part by mass of paraffin wax, 1 part by mass of polyethylene wax, 2 parts by mass of paraffin oil, 400 parts by mass of calcium carbonate, mixed uniformly, molded, extruded, and injection molded to obtain a profile (Material embryo), the material embryo is immersed in the nitric acid aqueous solution that weight concentration is 0.5%, washes, and removes calcium carbonate, obtains than in example 1 harder microporous photosensitive pad.

[0042] The size of the micropores is 40 microns, and the micropores are an open structure with an open rate of 99%.

[0043] The photosensitive stamp prepared by this method is compared with the performance of the Wanshi stamp, and the results are as follows:

[0044] ...

Embodiment 3

[0046] The polyethylene resin in Example 1 was changed to copolymerized polypropylene resin to obtain a soft and hard microporous photosensitive pad similar to Example 2.

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PUM

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Abstract

The present invention discloses one kind of photosensitive pad suitable for stamp and its preparation method. The photosensitive pad is made of mocroporous foamed material comprising polyolefin resin or its copolymer resin, organic pigment photosensitive agent, phenol antioxidant, non-ionic surfactant and other assistant. The photosensitive pad for stamp has small aperture size, high homogeneity and stable product quality and can meet relevant requirement.

Description

technical field [0001] The invention relates to a microporous foam material mainly made of artificial resin and a preparation method thereof, in particular to a stamp pad for photosensitive stamps and a preparation method thereof. technical background [0002] With the continuous development of the seal industry, the material requirements for making seals are getting higher and higher. At present, the most widely used material for making 10,000-time stamps (a permeable stamp that can be used more than 10,000 times with ink once added) is polyvinyl chloride powder sintered material, that is, atomic stamps. Its report has: described in JP8011882, JP8022962, JP81151586, JP8037331, this method is that polyvinyl chloride powder raw material and plasticizer, stabilizer, filler and other additives are mixed, and made into pellets, pellets are obtained through low-temperature pulverization Most of the tiny particles over 200 meshes are added into corresponding molds, heated and sin...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B41K1/36B41K1/00
Inventor 陆冲王庆海唐颂超
Owner 张志华
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