Non woven fabrics also have their own measurement methods for thickness and weight. Generally, thickness is calculated in millimeters, while weight is calculated in kilograms or tons. Let’s take a look at the detailed measurement methods for thickness and weight of non-woven fabrics.
Measurement method for non-woven fabrics
Any object has weight, just like the non-woven fabric we are talking about today. So how to calculate the weight of non-woven fabric?
In the calculation of the weight and weight of non-woven fabrics, four units are commonly used: one is the yard, abbreviated as Y in English; The second is meters, abbreviated as m, the third is grams, abbreviated as grams, and the fourth is millimeters, abbreviated as mm
Length calculation
In terms of specifications, both size and meter are used to calculate length. In non-woven fabric manufacturing, meter is usually used as the unit of length, and the measurement units of length include meters, centimeters, millimeters, etc. Due to the fact that non-woven fabrics are rolled one by one, the height of the roll is called width, expressed in meters. The commonly used specifications are generally 2.40 meters, 1.60 meters, and 3.2 meters. For example, in the process of producing non-woven fabric, each production process will have a specific length, such as “producing X meters of non-woven fabric in one molding machine”.
Weight calculation
Since there is length and width, is there a thickness unit? That’s right, there are. According to international standards, the units of measurement for weight are grams (g), kilograms (kg), etc. In non-woven fabric manufacturing, the commonly used unit of weight is grams, and grams are used to calculate thickness. grams refer to the square gram weight, which is g/m ^ 2. Why not use millimeters? In fact, millimeters are also used, but they are rarely used. This is an industry rule. In fact, the square gram weight can be equivalent to millimeters in thickness, as the weight of non-woven fabrics ranges from 10g/㎡ to 320g/㎡. In general, the thickness of non-woven fabric is 0.1mm, and the weight per square meter is 30g, so the weight of a 100 meter roll of non-woven fabric is 0.3kg.
Area calculation
The common units of area include square meters (square meters), square yards, square feet, etc. In the production process, special calculation methods must be used due to the varying thickness of non-woven fabrics. The commonly used thickness of non-woven fabric is 0.1mm~0.5mm, and the area calculation is generally based on the weight per square meter (g/㎡). For example, if the weight of one square meter of non-woven fabric is 50 grams, then the non-woven fabric is called 50 grams non-woven fabric (also known as 50g/㎡ non-woven fabric).
Hardness (feel)/Gloss
At present, there are very few instruments and equipment for testing the hardness of non-woven fabrics on the market, and they are generally tested based on hand feel/gloss.
The tensile parameters of non-woven fabrics
Non woven fabrics have longitudinal and transverse tensile parameters. If they are irregularly drawn, pressed, fused and sprayed, the difference in longitudinal and transverse tensile forces is not significant.
Under the gravity of the Earth, weight and mass are equivalent, but the units of measurement are different. The weight of a substance with a mass of 1 kilogram when subjected to an external force of 9.8 Newtons is called 1 kilogram weight. Generally, mass units are commonly used instead of weight, implicitly multiplied by gravitational acceleration. In ancient China, jin and liang were used as units of weight. Pounds, ounces, carats, etc. are also used as units of weight.
The commonly used units of mass include micrograms (ug), milligrams (mg), grams (g), kilograms (kg), tons (t), etc.
Measurement conversion cases
1. How to convert the weight of cloth from g/㎡ to g/meter?
The material of non-woven advertising poles is 50g/㎡. How many grams of raw materials are needed to produce a 100 meter long non-woven fabric? As it is a 50g/㎡ non-woven fabric, the weight per 1 square meter is 50 grams. By this calculation, the weight of a 100 square meter non-woven fabric is 50 grams * 100 square meters=5000 grams=5 kilograms. Therefore, the weight of a 100 meter long non-woven fabric is 5 kilograms/100 meters=50 grams/meter.
2. How to convert grams to area?
The diameter of non-woven fabric is 1.6m, the length of each roll is about 1500 meters, and the weight of each roll is 125kg. How to calculate the weight per square meter? Firstly, calculate the total area of each roll of non-woven fabric. The circular area with a diameter of 1.6 meters is π * r ²， Among them, r=0.8m, π ≈ 3.14, so the area of each roll of non-woven fabric is 3.14 * 0.8 ²≈ 2.01 square meters. Each roll weighs 125 kilograms, so the weight per square meter is 125 grams per square meter ÷ 2.01 square meters per roll ≈ 62.19 grams per square meter.
Conclusion
This article introduces the conversion method of non-woven fabric machine measurement, including calculations of area, weight, length, and other aspects. In the production process of non-woven fabrics, measurement problems are often encountered. As long as the corresponding conversion method is used for calculation, accurate results can be obtained.
Post time: Mar-02-2024