一、皮革耐撓性試驗(yàn)機(jī)說(shuō)明:

            使用耐橈專用夾具測(cè)試皮革表面在不斷受外力作用下皮料發(fā)生皺摺和破損的情形，本試驗(yàn)機(jī)用用于沙發(fā)面料的撓性試驗(yàn).
 

二、皮革耐撓性試驗(yàn)機(jī)目的 :  

             用于沙發(fā)上的皮革如果有良好的抗彎折的特性, 生產(chǎn)出來(lái)的沙發(fā)便不容易起皺接, 沙發(fā)會(huì)更美觀耐用.

         Purpose: If the leather use for the sofa have a good flex resistance properties, the product will have little chance to become winkle, and the product will be more durable and more comfortable.

               本皮革耐撓性試驗(yàn)機(jī)適用于3毫米厚度以下的皮革.

                Applicable to all types of leather below 3.0 mm in thickness.

三、皮革耐撓性試驗(yàn)機(jī)技術(shù)參數(shù):

                試片: 70*45mm

                彎折角度: 22.5

               彎折速度: 100±5cpm

                計(jì)數(shù)器: 0~999,999（六位數(shù)）

                電源: 220伏300瓦
設(shè)計(jì)標(biāo)準(zhǔn)： EN ISO 5402 

 1）      Open the upper and lower clamps so that the gap is at least twice the thickness of the test piece.

打開上、下夾,其打開的夾縫應(yīng)不少於待測(cè)試皮夾的2倍。

       2）      Turn the upper clamp so that its lower edge is parallel to the upper edge of the fixed lower clamp.

調(diào)整上夾使其底邊跟下固定夾的上邊平行。

      3）      Fold the test piece in two with the surface to be tested inwards so that the two longer sides are brought together. Clamp the folded test piece as shown in below figure （a） with the folded edge against the ledge and the end against the stop formed by the clamping screw.

將皮革沿長(zhǎng)邊對(duì)摺（測(cè)試面朝內(nèi)）, 將已對(duì)摺的皮革按下圖（a） 的樣子,摺邊擱在上夾突出的邊上，末端則貼近由鎖緊螺絲造成的限位上。

把未有夾緊的那一頭往外然后向下拉, 把兩個(gè)里面併攏, 然后將開口端按圖（c）夾緊在下夾,注意不要過(guò)份夾緊以致夾壞皮革，并且要跟對(duì)摺面垂直。

       5）      Run the machine for the required number of flex cycles selected from the following list:

Dry flex: 500；1000；5,000；10,000；20,000；25,000；50,000；100,000；150,000；

        200,000；250,000 CYCLES

 按所需測(cè)試週期開始測(cè)試。

       6）      cutting of sample: A rectangle shaped sample 70 ±1 mm x 45 ±1 mm.

       7）      樣辦尺寸: 70 ±1 mm x 45 ±1 mm.

      4）      Draw the free corners of the test piece outward and downward around the clamp as shown in figure （b）. Bring the inner surfaces together and clamp the free end in the lower clamp as shown in figure （c）, with the part of the folded test piece in the clamps vertical and using no more force than is necessary to make the leather just taut.

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