The blanket must be fastened to the cot under appropriate tension. If the blanket tension is too loose and the blanket cannot be reset in time due to displacement under the action of extrusion force during blanket embossing, it will lead to ghosting failure. If the blanket is too tight, it will bring many disadvantages

1膠層較薄，彈性較低。如果印刷壓力是通過在橡皮布的自場狀態(tài)下測量千分尺的厚度來計(jì)算的，則膠層的過度變薄可能導(dǎo)致印刷壓力不足。由于簾布層變薄，毯子的彈性降低了。即使在減小中心距離和增加壓縮的情況下，也可能發(fā)生油墨轉(zhuǎn)移不良。如果氣墊毯過緊，可能使微泡海綿層失效，失去氣墊毯的良好性能。

1. The adhesive layer is thin and has low elasticity. If the printing pressure is calculated by measuring the thickness of the micrometer in the self field state of the blanket, the excessive thinning of the adhesive layer may lead to insufficient printing pressure. As the ply becomes thinner, the elasticity of the blanket decreases. Even when the center distance is reduced and the compression is increased, poor ink transfer may occur. If the air cushion blanket is too tight, the microbubble sponge layer may fail and lose the good performance of the air cushion blanket.

2印刷壓力不均勻。由于張力的作用，毛毯在圓周方向上不同位置上的張力不均勻，造成毛毯在圓周方向上的減薄不均勻，造成印刷壓力不均勻。張力越緊，不均勻性越嚴(yán)重。壓力的不均勻性導(dǎo)致油墨轉(zhuǎn)移的不均勻性，使本應(yīng)均勻的場或平板背景色變得不均勻，使彩像的色調(diào)發(fā)生偏移。

2. Uneven printing pressure. Due to the effect of tension, the tension of the blanket at different positions in the circumferential direction is uneven, resulting in uneven thinning of the blanket in the circumferential direction and uneven printing pressure. The tighter the tension, the more serious the non-uniformity. The non-uniformity of pressure leads to the non-uniformity of ink transfer, which changes the color of the field or flat background that should be uniform, and shifts the tone of the color image.

3影響同步滾動(dòng)狀態(tài)。在正常橡皮布張力和膠筒內(nèi)襯厚度的情況下，三個(gè)輥?zhàn)泳哂辛己玫耐杰堉茀^(qū)，因此在張力過大的情況下，膠筒與板筒、壓印筒的同步軋制比會(huì)上升，破壞同步軋制狀態(tài)，三個(gè)輥?zhàn)訒?huì)滑動(dòng)，這會(huì)影響網(wǎng)點(diǎn)的正確轉(zhuǎn)移，破壞原稿的層次和色彩。

3 affect the synchronous rolling state. Under the condition of normal blanket tension and rubber cylinder lining thickness, the three rollers have a good synchronous rolling area. Therefore, under the condition of excessive tension, the synchronous rolling ratio of rubber cylinder, plate cylinder and embossing cylinder will rise, destroy the synchronous rolling state, and the three rollers will slide, which will affect the correct transfer of dot and destroy the level and color of the original.

4加速橡膠毯的蠕變和老化。張力越緊，越容易引起橡膠分子的構(gòu)象變化，分子鏈越硬，橡膠的彈性越差，影響產(chǎn)品的印刷質(zhì)量，縮短橡皮布的使用壽命。

4 accelerate the creep and aging of rubber blanket. The tighter the tension, the easier it is to cause the conformational change of rubber molecules. The harder the molecular chain, the worse the elasticity of rubber, which affects the printing quality of products and shortens the service life of rubber blanket.