Paper Elongation Measurement Device with Gravitational Loading
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Solution Overview
Problem
Current methods for measuring the elongation behavior of paper and paper-like materials under varying environmental conditions are inadequate, as they are difficult to transport and sensitive to environmental changes, limiting the ability to optimize manufacturing and processing conditions based on temperature and humidity effects.
Innovation Solution
A method involving a device with clamping holding devices and a loading weight system to apply a tensile force to a test specimen, allowing measurement of elongation under controlled temperature and humidity conditions, with an equilibration time to ensure equilibrium, and calculation of strain coefficients to compare material properties.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If complex measurement devices are used to measure elongation behavior under controlled environmental conditions, then measurement precision is improved, but device complexity and portability are worsened
Solution Approach 1:
The measurement device is divided into separate functional components: a simple frame structure, independent holding devices for clamping specimens, separate weighting systems for applying tensile force, and distinct measurement mechanisms for recording elongation. This segmentation allows each component to be optimized independently while maintaining overall measurement precision, and enables easier transport and assembly of the complete system.
2Reliability
If climate control devices are integrated into the measurement system to control temperature and humidity, then measurement reliability under different environmental conditions is improved, but device complexity and energy consumption are worsened
Solution Approach 1:
The patent introduces separate climate control devices as intermediary systems that create controlled environmental chambers around the measurement apparatus. These external climate control systems (humidifiers, heaters, ventilators) act as mediators between the measurement device and the environment, allowing the core measurement system to remain simple while still achieving reliable measurements under controlled temperature and humidity conditions.
3Measurement precision
If external power supply and control systems are added to the measurement device, then automation and measurement precision are improved, but ease of operation and portability are worsened
Solution Approach 1:
The measurement device incorporates self-service features including automatic specimen clamping through simple mechanical operations, self-recording of elongation data through marked indicators that automatically track position changes, and self-calibration capabilities where the initial specimen length is recorded and used as reference for subsequent measurements. These self-service mechanisms reduce the need for complex external control systems while maintaining measurement precision and simplifying operation.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
Enables accurate measurement of elongation behavior under different environmental conditions, allowing for optimization of paper properties and comparison of materials, while being portable and energy-efficient due to its simple structure and lack of external energy requirements.
Implementation Method 1
a loading weight system to apply a tensile force to a test specimen
Implementation Method 2
measuring the elongation behavior of paper and/or a paper-like material
Data Source
Figure 1
AI summary
The invention relates to a method for measuring the elongation behavior of paper and/or a paper-like material, comprising the following steps: (a) fixing a test specimen (3) between two opposing holding devices (1, 2), wherein the test specimen (3) comprises or consists of paper and/or a paper-like material, (b) setting a predetermined temperature and a predetermined relative humidity for the measurement, (c) applying a tensile force (Fz) to the test specimen (3), and (d) measuring the change in length of the test specimen (3) under the tensile force (Fz) applied to the test specimen (3). The invention further relates to a device and the use of such a device.