Overview
The folding tester is an essential quality control instrument for manufacturers of paper-based products, flexible packaging, and textiles. It quantitatively measures how many double folds a material can withstand before failure, providing critical data for product development and compliance with industry standards like ISO 5620. Modern folding testers combine mechanical precision with digital controls, offering repeatable test conditions and automated counting. They are widely used in paper mills, packaging converters, and research laboratories to predict real-world performance of materials subjected to frequent handling.
Structure and Working Principle
A standard folding tester consists of a clamping system to hold the test specimen, folding jaws that create precise 135° folds, a counter mechanism, and often a load application system (typically 500g-1kg). The machine operates via an electric motor that drives the folding mechanism at a controlled speed (commonly 60-120 folds per minute). The test specimen (usually 15mm wide strips) is subjected to repeated folding until fiber rupture occurs or until a predetermined number of folds is reached. Advanced models feature touchscreen interfaces, programmable test parameters, and data export capabilities for statistical analysis.
Key Features
Precision-engineered folding mechanisms ensure consistent fold angles (±1° tolerance) across thousands of cycles, critical for reliable comparative testing. Many models incorporate automatic specimen tensioning to maintain consistent force throughout the test duration. Digital models offer enhanced functionality including automatic stop at specimen failure, multiple test mode storage, and connectivity options for integration with laboratory information management systems (LIMS). Some high-end versions include environmental chambers to test materials under controlled humidity and temperature conditions.
Application Areas
In the paper industry, folding testers help predict the lifespan of documents, maps, and currency paper. Packaging manufacturers use them to evaluate linerboard and folding boxboard for cartons that undergo frequent opening/closing cycles. The textile sector employs specialized folding testers for fabrics, particularly in garment manufacturing where crease resistance is crucial. Emerging applications include testing flexible electronics substrates and biodegradable packaging materials where fold integrity affects both functionality and sustainability claims.
Maintenance and Precautions
Regular maintenance should include lubrication of moving parts, inspection of folding jaws for wear, and verification of load application accuracy. Monthly calibration with certified reference materials is recommended to maintain testing accuracy. Operators should avoid testing materials beyond the machine's specified thickness capacity to prevent mechanical strain. The testing environment should be maintained at standard conditions (23°C ±1°C, 50% ±2% RH for paper testing) unless specifically testing material behavior under extreme conditions.
B2B Procurement Guide
When sourcing folding testers, prioritize machines compliant with relevant industry standards (ISO, TAPPI, DIN). Consider throughput requirements - semi-automatic models suit small labs, while fully automated systems with multiple test stations benefit high-volume testing facilities. Evaluate after-sales support including calibration services and spare part availability. For specialized applications, seek manufacturers offering customization options such as alternative folding angles or integrated weighing systems. Request demonstration data showing repeatability across multiple test runs to verify equipment precision.
Related Manufacturers
- 主营：拉力试验机、万能试验机、老化试验箱、恒温恒湿箱
- 主营：试验机、拉力机、步入式高低温老化房、氙灯老化试验箱
- 主营：实验室检测仪器、橡胶塑料胶黏类实验室仪器、力学仪器、万能材料试验机、环境学仪器、行业专用仪器、非标定制仪器
- 主营：测定仪、钻孔取芯机、胶砂搅拌机、抗冲磨试验机、混凝土抗渗仪、碱骨料比长仪、混凝土搅拌机
- 主营：[]
- 主营：[]
- 主营：分析仪、测试机、双光源、折断力、试验机、薄膜热、检查台、测量仪、热封仪、检测仪、透湿仪、撕裂力、测试台、柔软度、测试仪、应力仪、水蒸气、pvc硬片、剥离力、抗冲击、测定仪、力测试、试验仪、扭矩仪、密封仪
- 主营：热封强度试验仪、落镖冲击试验仪、测厚仪、智能电子拉力试验机、玻璃瓶冷热冲击试验仪、顶空气体分析仪、垂直轴偏差测试仪、摆锤冲击试验仪、摩擦系数测定仪、气体渗透性测试仪、水蒸气透过率测试仪、微泄露测试仪、薄膜拉力机、泄露与密封性测试仪、玻璃瓶耐内压测试仪、自动扭矩仪、透湿性测试仪、隔膜透气度测试仪
- 主营：机械性能测试设备、可靠性环境测试设备、家电用器检测设备、无螺纹端子弯曲试验机、国家电网检测设备、防水防尘检测设备、非标定制设备
- 主营：拉伸试验机、万能试验机、拉力试验机、压缩弯曲试验机、弹簧试验机、弹簧拉压试验机、疲劳试验机、弹簧疲劳试验机、减震器疲劳试验机、万能拉力试验机、压力试验机、扭转试验机、线材扭转试验机、材料扭转试验机、电子扭转试验机、多通道疲劳试验机、反复弯曲试验机、线材缠绕试验机、缠绕扭转试验机
- 主营：试验仪、陶瓷砖、测定仪、试验机、制样机、试验箱、土工布、土工膜、橡胶试、老化箱、波纹管、检测仪、冲片机、刨片机、厚度仪、粗粒土、水流量、膨润土、磨片机、测厚仪、土工合成材料、防水卷材
- 主营：口罩防护服、注射针、鲁尔圆锥、大底弯折试验机属性、纺织类检测仪器、测定仪、传感器、对色箱、硬度计、测试仪、试验箱、百格刮擦、疲劳强度测试仪、织物燃烧、缝合针、试验仪、刮擦仪
- 主营：密封测试仪、水蒸气透过率测试仪、气体透过率测试仪、摩擦系数剥离试验机、微泄漏无损密封测试仪、微泄漏密封试验仪、薄膜测厚仪、接骨螺钉性能测试仪、透气度测试仪、热封试验仪、摩擦系数仪、氧气透过率测试仪、密封试验仪、泄漏与密封强度测试仪、扭矩试验仪、包装耐压试验仪、包装耐压性能测试仪、导管滑动性能测试仪、刷磨仪、导管摩擦力测试仪、揉搓试验仪、穿刺力测试仪、注射器滑动性能测试仪、注射器器身密合性测试、微生物入侵试验仪
- 主营：试验机、轮椅双辊疲劳试验机、轮椅跌落试验机、轮椅静压强度试验机、轮椅刹车疲劳试验机、电吹风老化试验机、电吹风开关在线试验机、脚轮行走试验机、聚氨酯轮行走耐磨试验机、车架震动试验机、轮胎行走寿命试验机、轮胎冲击试验机、自行车综合试验机、滑板车行走寿命试验机、电热毯耐压试验机、电热毯动负载试验机、电热毯发热线弯曲试验机、手表扭转疲劳试验机、手机跌落试验机、牛仔布滚筒跌试验机、电脑转轴试验机、拐杖疲劳试验机、轮椅静态稳定性测试机、直发器疲劳测试机、53点风筒温度测试仪
- 主营：土壤养分检测仪、食品安全检测仪、程控定量封口机、纸张耐折度测定仪、蜂蜜检测仪、COD检测仪、农药残留检测仪、光合作用测定仪、土壤检测仪、多参数水质检测仪、土壤呼吸测定仪、浮游菌采样器、叶绿素测定仪、兽药残留检测仪、水质检测仪、微波消解仪、荧光定量pcr仪、牛奶分析仪、植物蒸腾仪、微生物检测仪、悬浮物检测仪、气相色谱仪、液体密度计、尘埃粒子计数器、辣椒素检测仪
- 主营：炉温测试仪、炉温跟踪仪、4通道炉温测试仪、剥离试验机、双柱拉力试验机、拉力试验机、全自动钢球冲击试验机、按键寿命试验机、落球冲击试验机、柔性玻璃弯折试验机、万能材料试验机、波峰焊炉温测试仪、单柱拉力机
- 主营：测厚仪、密封性测试仪、热封试验仪、电子拉力试验机、撕裂度测试仪、摩擦系数仪、剥离强度测试仪、持粘测试仪、水蒸气透过率测试仪、透湿性测试仪、气体透过率测试仪、透气性测试仪、氧气透过率测试仪、落球冲击试验仪、落镖冲击试验仪、透气度测试仪、密封测试仪、薄膜测厚仪、耐破度测试仪、鲁尔接头测试仪、鼻氧管测试仪、缝合线线径测试仪、包装密封性测试仪、医药包装性能测试仪、锋利度测试仪
- 主营：食品安全检测仪、水质检测仪、土壤养分检测仪、纸张耐折度测定仪、农药残留检测仪、微波消解仪、蒸馏仪、余氯检测仪、浮游菌采样器、微生物采样器、微生物检测仪、油液颗粒计数器、负氧离子检测仪、氮吹仪、光合测定仪、叶面积测量仪、COD检测仪、闪点测定仪
- 主营：密封性测试仪、测厚仪、瓶盖扭矩仪、智能电子拉力试验机、剥离强度试验机、安瓿瓶折断力测试仪、穿刺力测试仪、初粘检测仪、注射针刚性测试仪、摩擦系数仪、落镖冲击试验仪、电子瓶壁厚测量仪、玻璃瓶抗冲击试验仪、注射器滑动性能测试仪、导管流量测试仪、质构仪、持粘性测试仪、初粘测试仪、医用针管韧性测试仪、垂直轴偏差测试仪、偏光应力仪、阻水性测试仪、缝合线线径测量仪、安瓿瓶圆跳动测试仪、锋利度测试仪
- 主营：线材扭转试验机、扭矩试验机、弹簧拉压试验机、电子万能试验机、疲劳试验机、弯曲试验机、压力试验机、拉力试验机、冲击试验机
- 主营：融指仪、测试机、安全帽、试验机、测试台、压片机、安检线、电池杆、测试仪、试验箱、冲击仪、口罩机、喷涂机、比色箱、冲击测试、工业烤箱、检测仪器、工业脚轮、数显球拍、疲劳试验仪、拉力试验台、漆膜冲击器、纸张取样器、整体实验室、四轮滑板车