The influence of various physical properties of th

2022-09-23
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The influence of various physical properties of blanket on the quality of printed matter

the thickness is expressed and measured. The thickness value expressed is called nominal thickness. This expression method is based on the requirements of ISO specification. The actual thickness is provided by the blanket manufacturer according to the printing machine and practical conditions, so this thickness is not limited and must be the same as the measured thickness. For this reason, the blanket manufacturer will attach a checklist with the measured thickness of each roll of blanket when it leaves the factory, or print the value on the back of the blanket

hardness generally refers to the surface hardness of rubber blanket, that is, the overall hardness value of rubber surface layer, base cloth layer and compression layer, which is expressed by shore hardness value as an index of rubber blanket compression performance

rebound is expressed in%. Drop a certain weight of conical object onto the rubber surface of the blanket to measure its rebound force. This value can be regarded as the energy absorption of the blanket. This is closely related to the quality of surface rubber and air cushion layer, and has a great impact on the quality of air cushion blanket and prints

the elongation is expressed in%. Reinforce a certain load in the longitudinal direction of the test object with the specified size, and measure the elongation obtained by the calculation formula after a certain time. This value is closely related to the base fabric structure of the blanket, and has an impact on the tightening times during the installation and printing of the blanket, and the thickness change of the rubber nose

the breaking strength is expressed in%. Reinforce a certain load in the longitudinal direction of the test object with the specified size, and measure the elongation of the test object at breaking at a certain tensile speed. It is still in an important strategic opportunity period of development

the bond strength between layers is expressed in n/mm, and the bond strength of each layer of the test article of the specified size. This value affects the stability of print quality. It is a very important index for the surface rubber layer, top base cloth and air cushion layer at high speed. When D1> 9, the dimensional deviation and appearance quality are unqualified

in addition, the solvent resistance is expressed in thickness change mm, and the ink resistance is expressed in thickness change mm. All manufacturers have specified quantity values to control the operation skills of the wear resistance testing machine, which is roughly similar to that of some testing machines of Jinan new era Gold Testing Instrument Co., Ltd

in terms of dynamic physical properties, the subsidence is expressed in mm, and the perimeter change rate is expressed in%. All manufacturers also have specified quantitative values to control

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