保麗龍包裝材料與落下實驗G值之研究

A Study of the G Value of Drop Test on Styrofoam Materials

何翊倫(Yi-Lun Ho)

指導教授 ： 蔡瑞益

中原大學/工學院/機械工程研究所/碩士(2009年)

https://doi.org/10.6840/cycu200901111

摘要

保麗龍包裝材料在現今許多的產品包裝中佔有非常高的使用率，保麗龍有著高效的緩衝性、良好的耐衝擊性及成本相當低廉的好處。如需要驗證保麗龍是否能夠安全理想的保護包裝好的產品跌落時，不受過度的衝擊而損壞，落下試驗時通過傳感器所能測知的G值便是一個可以衡量指標。
本文針對保麗龍材料的發泡顆粒大小、密度、產品接觸面積、緩衝材料距離，以及落下試驗高度的變化，來做一個詳細的分析及比對。並利用LCD Monitor業界普遍參考的落下試驗測試標準及方法，來試驗出在前述各個不同的條件下的G值走向，藉以找出有效的方法來降低G值對於產品跌落時的衝擊。
保麗龍包裝材料的許多相關設計參數的來源是從產品落下實驗後的結果而來。包裝緩衝材料設計的合理與否會直接的影響到產品的保護效果，而實驗時所測得的G值大小則是緩衝包裝產品是否可以良好且有效來保護產品的一個很好且重要的參考依據。材質相同的緩衝材料，其大致上的緩衝性都有一定相對的穩定性且規律的，如產品的抗拉力，抗壓，彈性…等等的基本特性，在一定的條件下是相對穩定的。但是在這相對穩定的特性中，如果包裝緩衝材料本身的設計很合理，其產生的緩衝效果就會比較明顯。
綜合所有數據可以發現，在發泡密度高、接觸面積大、緩衝距離小的情況下，面對較高的落下試驗測試高度時，會產生出較高的G值也就是對於產品的衝擊較大。反之在發泡密度低、接觸面積小、緩衝距離大的情況下，面對較高的落下試驗測試高度時，會產生出較高的G值也就是對於產品的衝擊較小。

關鍵字

落下實驗 ； 保麗龍 ； G值

並列摘要

There is very high utility rate to use Styrofoam material when products need to be pack; due to it has high buffer to absorb the shock and lower price relative to other packing materials. “G factor” is one way to measurement the Styrofoam material is qualify enough to protect the product to absorb the shock if dropped, when we do the Drop-Test, we can use Sensor to get it.
A theoretical study are on the vesicant pellet size, the density after mold, the superficial of product contact, the distance of cushion buffer and fixed height of Drop-Test to do the detail evaluation and verification. And use Drop-Test standard specification and method which is normally used in LCD Monitor products to get the G Value variation in the different condition and try to find the efficacious way to reduce the G Value when products fallen.
The package design concept of Styrofoam materials are all refers from Drop-Test result. A reasonable package design will impact the products protection effect, and G factors which were from drop test are good reference materials for the packing design. The cushioning effect of same material cushions are stable and regular when on the same conditions, like basic property of the tensile strength, the compressive strength and the coefficient of elasticity...etc. But, it still needs reasonable package design to accentuate the cushioning effect.
In accordance with the result can found, in the conditions of high vesicant density, major contact superficial, thin of cushion buffer and higher height of Drop-Test got the higher G Value and major impact to the product. To the contrary conditions of low vesicant density, minor contact superficial, thick cushion buffer and lower height of Drop-Test got the lower G Value and minor impact to the product.

並列關鍵字

drop test ； G value ； Styrofoam

參考文獻

11. ASTM D 1596-97 (Reapproved 2003)Dynamic Shock Cushioning Characteristics of Packaging material，pp 1-4。

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2. 曾漢壽(1996a),緩衝包裝材料知多少(上), 台灣包裝工業雜誌,Vol.67, pp 56-60。

3. 曾漢壽(1996b),緩衝包裝材料知多少(下), 台灣包裝工業雜誌, Vol.68, pp 46-50。

4. David Eaves, Hand Book of polymer Foams, iSmithers Rapra Publishing, Chapter 1.1, pp 1 and Chapter 3.0 pp 37-53, 2006。