Technique for producing printing blanket airpillow layer

A production process and blanket technology, applied in the production process field of printing blanket air cushion layer, can solve the problems of blanket printing performance impact, poor recovery, poor elasticity, etc., achieve good elasticity, not easy to compress and deform, and improve printing performance Effect

Inactive Publication Date: 2008-05-14
HANGZHOU YUANYANG IND
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The defect of such tiny cells is poor elasticity and poor recovery after being compressed and deformed by pressure, which affects the printing performance of the blanket.

Method used

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  • Technique for producing printing blanket airpillow layer

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] 1) Add sulfur and ultra-fine chemical blowing agent--4,4'-oxobisbenzenesulfonyl hydrazide into the rubber compound and stir evenly. The weight ratio of the ultra-fine chemical foaming agent to the rubber compound is 1:10 ; Vulcanizing agent (sulfur) is conventional consumption;

[0022] 2), above-mentioned rubber compound is coated on the cotton cloth, is then compounded with the cotton cloth that the remaining three layers are coated with common rubber compound;

[0023] 3) Put the compounded semi-finished product into a drum vulcanizer for continuous vulcanization, the vulcanization pressure is 10 MPa, the vulcanization temperature is 140° C., and the vulcanization speed is 10 m / hour.

Embodiment 2

[0025] 1) Add sulfur and ultra-fine chemical blowing agent--4,4'-oxobisbenzenesulfonyl hydrazide into the rubber compound and stir evenly. The weight ratio of the ultra-fine chemical foaming agent to the rubber compound is 1:25 ; Vulcanizing agent (sulfur) is conventional consumption;

[0026] 2), above-mentioned rubber compound is coated on the cotton cloth, is then compounded with the cotton cloth that the remaining three layers are coated with common rubber compound;

[0027] 3) Put the compounded semi-finished product into a drum vulcanizer for continuous vulcanization, the vulcanization pressure is 15 MPa, the vulcanization temperature is 150° C., and the vulcanization speed is 12 m / hour.

Embodiment 3

[0029] 1) Add sulfur and superfine chemical foaming agent--4,4'-oxobisbenzenesulfonylhydrazide into the rubber compound and stir evenly. The weight ratio of superfine chemical foaming agent to rubber compound is 1:40 ; Vulcanizing agent (sulfur) is conventional consumption;

[0030] 2), above-mentioned rubber compound is coated on the cotton cloth, is then compounded with the cotton cloth that the remaining three layers are coated with common rubber compound;

[0031] 3) Put the compounded semi-finished product into a drum vulcanizer for continuous vulcanization, the vulcanization pressure is 18 MPa, the vulcanization temperature is 160°C, and the vulcanization speed is 15 m / h.

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Abstract

The invention relates to a manufacturing technique of printing rubber blanket air cushion layer for the offset printing machine printing roller, which solves the technical problem of quality and productivity for the air cushion by the provided craft. The invention is characterized in that, firstly, a vulcanization agent and an ultrafine chemical foaming agent are put into a rubber sizing material and mixed evenly, and the weight ratio of the ultrafine chemical foaming agent and the rubber sizing material is form 1:40 to 1:15; secondly, a cotton cloth is coated by the rubber sizing material and compounded with the cotton cloth the other three layers of which are coated by the common rubber sizing material; thirdly, the compounded semi-finished products is put into a drum vulcanizer to be continually vulcanized, the vulcanization pressure is form 10 MPa to 18 MPa, the vulcanization temperature is from 140 centigrade to 160 centigrade, and the vulcanization speed is from 10 to 15 m/h; fourthly, the ultrafine chemical foaming agent is 4, 4'-Oxylbisbenzenesulfonyl Hydrazide, and the fineness is from 500 to 1000 mesh; fifthly, the vulcanization agent is sulfur.

Description

technical field [0001] The invention relates to a production process of a blanket, in particular to a production process of a printing blanket air cushion layer on a printing cylinder of an offset printing machine. Background technique [0002] The blankets on the printing cylinder of the existing offset printing machine are all four-layer cloth and four-layer rubber structure as shown in Figure 2 (except for one layer of rubber is an air cushion layer, the remaining layers of rubber are ordinary rubber rubber materials): The air cushion layer 1 is made by physical foaming [the added physical foaming agent is heated and expanded to form microsphere cells when the rubber compound is vulcanized]. There are countless independent tiny cells distributed in the air cushion layer, and each cell They are all similar to tiny table tennis balls (about 0.15-0.25mm in diameter), and the internal pressure of the cells is the same as the external pressure. The defect of such tiny cells i...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B32B37/15B29C35/02C08K5/42C08L21/00C08J9/04
Inventor 王德平
Owner HANGZHOU YUANYANG IND
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