影響紙箱抗壓強(qiáng)度的因素
1、原材料質(zhì)量
原紙是決定紙箱壓縮強(qiáng)度的決定性因素，由kellicutt公式即可看出。然而瓦楞紙板生產(chǎn)過(guò)程中其他條件的影響也不允許忽視，如粘合劑用量、楞高變化浸漬、涂布、復(fù)合加工處理等。
2、水分
紙箱用含水量過(guò)高的瓦楞紙板制造，或者長(zhǎng)時(shí)間貯顧在潮濕的環(huán)境中，都會(huì)降低其耐壓強(qiáng)度。纖維是一種吸水性很強(qiáng)的，在梅雨季節(jié)及空氣中濕度較大時(shí)，紙板中水分與大氣環(huán)境的濕平衡關(guān)系很重要。
3、箱型
箱型是指箱的類(lèi)型和同種類(lèi)型箱的尺寸比例，它們對(duì)抗壓強(qiáng)度有明顯的影響。有的紙箱箱體為雙層瓦楞紙板構(gòu)成，耐壓強(qiáng)度較同種規(guī)格的單層箱明顯提高;在相同條件下，箱體越高，穩(wěn)定性就越差，耐壓強(qiáng)度越低。
4、印刷與開(kāi)孔
印刷會(huì)降低紙箱抗壓強(qiáng)度。包裝有透氣要求的商品在箱面開(kāi)孔，或在箱側(cè)沖切提手孔，都會(huì)降低紙箱強(qiáng)度，尤其開(kāi)孔面積大，偏向某一側(cè)等，影響更為明顯。
5、加工工藝偏差
在制箱過(guò)程中壓線(xiàn)不當(dāng)，開(kāi)槽過(guò)深，結(jié)合不牢等，也會(huì)降低成箱耐壓強(qiáng)度。
Factors affecting the compressive strength of cartons
1. Quality of raw materials
Base paper is the decisive factor to determine the compression strength of cartons, which can be seen from kellicutt formula. However, the influence of other conditions in the production process of corrugated board should not be ignored, such as the amount of adhesive, the change of corrugated height, impregnation, coating, composite processing and so on.
2. Moisture
Cartons made of corrugated cardboard with high moisture content, or stored in a humid environment for a long time, will reduce their compressive strength. Fiber is a kind of water absorbent. In the rainy season and when the humidity in the air is high, the moisture balance between the water in the paperboard and the atmospheric environment is very important.
3. Box type
Box type refers to the type of box and the size ratio of the same type of box, which have a significant impact on the compressive strength. Some cartons are made of double-layer corrugated cardboard, and the compressive strength is significantly higher than that of single-layer cartons of the same specification; Under the same conditions, the higher the box, the worse the stability and the lower the compressive strength.
4. Printing and tapping
Printing will reduce the compressive strength of cartons. Opening holes on the case surface or punching handle holes on the side of the case will reduce the strength of the carton, especially if the opening area is large and tends to one side.
5. Process deviation
In the process of making boxes, improper pressing, too deep slotting, and poor bonding will also reduce the compressive strength of boxes.
