Fabric Rain test
Spray Rating
Tester Main content：
l Development
of Fabric waterproof or Rain Test
l Category
of Fabric waterproof and Rain Test
l Factors
influencing Fabric water permeability Properties
l Rain
Test Instruments
l Test
Method for GOLLOWEN Rain Tester
Rain Tester
Even rainy spring, Huangmei
Yu in summer, as well as the autumn rainy season ... rain moistening and nourishing
the earth, but accidentally drenched it on having a hard time. Rain, everyday
life has always been an inevitable problem. At the same time, taking into
account people's comfort requirements, not drenched "breathable
fabric" received more and more attention. With the increasing development
of science and technology, social material and cultural living standards, human
rain on this subject, carried out fruitful work, the emergence of many new
waterproof materials or products
How to evaluate the
performance of water-resistant material? what kind of test standards and
methods for the development of new water-resistant product has very important
significance. This article is about the Fabric Rain Performance, introduces the
development of fabric waterproof water permeability, classification, and
factors that affect its performance, combined GOLLOWEN rain tester, make a
detailed rain explanation of the standards and methods for testing the fabric performance.
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Daily
three-piece kind of Rain gear
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（GORE-TEX）fabric Waterproof
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1. Development of Fabric Spray
Rating Tester
Initial implementation of Fabric Spray Rating Tester feature is Ventile, it is
100% cotton woven fabric mainly for troop use. The principle is the fabric made
by the wet cotton fiber cross-sectional area after the expansion, so that the
pores between the fibers of the fabric shrink, so that the penetration of water
required extremely high pressures. With the synthetic fiber denier, denier
filaments of ultra-high density fabric shrinkage (more than 70,000 per square)
appears, but also combines super water repellent finishing technology, these
products and waterproof and breathable wearing comfort there greatly improved
Micro porous PTFE film in
1969 by the landmark R.W.Gore development, named Goretex laminate or
(composite) fabric, is launched in 1971, it is waterproof and breathable fabric
development process important progress. Its first-generation products to market
in 1976, according to market soon and reflect the improved second-generation
products to market in 1978; later have developed two types of elastic and
thermal insulation products, in recent years, a new generation of products
appear Gore windstopper in the market. Subsequently, the Netherlands, Japan,
Britain and other relevant enterprises to develop a micro-porous or non-porous
and non-porous polyurethane film co-polyester film laminated fabric, waterproof
and breathable laminated fabric become the main force in the function of the
product.
In the eighties, the coating
technique, polyurethane represented by dry / wet process technology research
and development, the development of fabric moisture functional products from a
huge boost
According to the information
it said that since the 1980s, waterproof fabric is rapidly increasing rapidly
in the European market, with a capacity of 40 million meters, worth over 270
million pounds. Originally laminated fabrics dominate the market, in 1996; it
is coated fabrics market share of 55% of the UK market which accounted for more
than 30% of the European total. The D & K Consulting market research data
show (1996.11 ~ 1997.7), had predicted to 2000, the Western European market of
45 million meters waterproof and breathable fabric. In addition, by the Dutch
company Akzo-Nobel developed Sympatex laminated fabric market share in Western
Europe of 70%, and continue to open up markets abroad.
In recent years, the
domestic casual wear and casual wear fabrics used in respiratory function of
laminated fabric (knitted or woven fabric and the film adhesive) or coated
fabrics increased significantly
Fabric Spray Rating Tester
In fact, for the fabric
waterproof fabric, there are many test instruments, such as the use of hydrostatic
testing method of hydrostatic pressure tester, using the spray method to test
spray water repellent performance tester, and evaluated by the test water the
absorption speed automatic testing machine. However, for the rain was wetting
and penetration resistance performance test fabrics generally used Spray Rating Tester.
Spray Rating Tester is used to detect a
variety of textile materials, especially rainwater infiltration protection
garment and textile materials and under different pressure rain, or
water-repellent fabric composites. This method is applicable to any or without
a water repellent finish fabric, the fabric can be used to measure the impact
of water permeability, it can also be used to predict the permeability of the
fabric rain. Especially suitable for measuring the penetration resistance of
clothing fabric, fabric measuring water permeability or water resistance is to
measure its water-repellent or water conductivity, with the actual use of
different fabrics and in different ways, and to express a variety of
appropriate indicators permeable fabric or waterproof
The Spray Rating Tester comprises
a metal framework allowing distilled water to be sprayed through a nozzle onto
a test specimen at 45° and 150mm below. The appearance of the specimen is
compared against an optional photographic scale to rate.
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Spray Rating Tester
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Automatic water absorption rate
tester
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1.
GOLLOWEN Rain Tester
Rain Tester Test
Principle：The tester simulates that rain
horizontally impacts fabric samples mounted vertically in a stainless steel
bath. Samples are backed with a standardized blotting paper which is weighed
before and after each test. The rain is formed by a column of water which can
be adjusted from 600mm (24in) to 2400mm (96 inches) depending on model in 300mm
(12 inches) increments, applied via a standardized nozzle. Provided
water supply system with temperature controlled, including electronic
temperature controller, a mixing tank and solenoid valve.
Rain Tester Test
Standard：GB/T23321，AATCC 35，BS EN ISO 22958
Rain Tester Spec：（as table）
Adjustable
value of water: 0.6m、0.9m、1.2m、1.5m、1.8m、2.1m、 2.4m
Nozzle
hole diameter: 0.99±0.013mm
The
number of nozzles holes: 13
Distance
from the nozzle to the specimen: 305mm
Application:
for the determination of water-repellent properties at different rain pressure
fabric or composite material
Rain Tester：Rain
performance test, the most commonly used for the GB / T23321, AATCC 35 and ISO
22958 standards. And GB / T 23321 modify using ISO 22958 standards, the
technical content are basically the same. Hereinafter, only the GB / T23321
AATCC 35 and make comparative illustration.
1.1
GB/T23321 Textiles.
Water resistance. Rain tests: Exposure to a horizontal water spray
1.1.1 Rain Tester Principle
The back with
absorbent paper (known mass) of water in a sample under specified conditions
spray 5min, then re-weigh the quality absorbent paper, absorbent paper was
determined by increasing the quality of the experiment samples of water seep
through quality
1.1.2
Rain Tester Materials
Use
white absorbent paper, having a thickness of 0.7mm, a mass of about (385 ± 4.5)
g / m2, absorption of (200 ± 30) %.
1.1.3
Sample 200x200mm. Presetting wet for at least 4 hours
1.1.4
Step: The absorbent paper laminated on the back of a sample
held on the sample holder, absorbent paper size of 150 × 150mm and after
weighing. The sample holder is fixed on a vertical rigid support, the sample is
located directly on the surface and away from the spout 305mm surface position;
At
a predetermined pressure head, make the test water samples oriented toward
sustaining level spray 5min; After spraying, carefully remove the absorbent
paper and immediately measure its quality, but fine to 0.1g; According to the
test results to determine the accuracy want to get the number of samples, but
not less than three.
1.1.5
Calculation Results
1.1.5.1 To increase the mass of
absorbent paper 5min during the experiment as the water permeability value,
calculates the average of at least three specimens. The test results mean value
of a single sample or assay sample of over 5g of abbreviated as "5 +
g" or "> 5g"
1.1.5.2 To draw a complete
anti-permeability curve of samples based on the average permeability values
measured under different pressure head. By increasing the pressure head value
(starting from 610mm to 305mm as a grade increased successively) measured:
a. the maximum pressure head of
no penetration phenomenon
b. With the increase of
pressure head, fabric water permeability changes
c. The minimum pressure head
occurs "through" phenomenon, that is, osmotic pressure head when
water exceeds 5g
In each test a pressure
head at least three samples, calculate the average value of penetration in the
pressure head
1.1.6
Rain Tester Test Report
The
test report shall include the following,
a. The standard number
b. The number of test
specimens
c. Sample Description
d. The humidity and atmospheric
testing standard
e. water temperature,
hardness and pH values for test
f.
Details f. Any deviation from the standard
g. test results
1.2 AATCC 35 Water
Resistance: Rain Test
1.2.1
Rain Tester Principle
With
a successful absorbent wrap the test sample, sprayed with water under
controlled conditions 5min, absorbent paper and then weighed again to determine
the amount of water leakage in the sample during the test
1.2.2
Rain Tester Materials
AATCC
Textile material absorbent paper
1.2.3
Sample 200x200mm. Presetting wet for at least 4 hours
1.2.4
Step: Test
sample 15.2x15.2cm, weight about 0.1g to wrap the standard, sample clamp onto
them, then mounted on a vertical support frame immediately after the
preparation of the sample components in the middle position of the spray in the
face amount sprayer nozzle 30.5cm distance. At a temperature of 27 ± 1 ℃ with a water sprayer
direction sideways facing continuous sample injection 5min. After the
injection, immediately measure of its quality, but fine to 0.1g. Test three
times.
1.2.5
Rain Tester Evaluation
1.2.5.1
The infiltration of water may vary depending
on the increase in the amount of water absorbent paper 5min to calculate and
record the average of three test samples, the results of a single test or the
average of more than 5g may be abbreviated as "5 + g" or ">
5g "
1.2.5.2
To obtain a
composite fabric material or fabric material complete a comprehensive amount of
impermeable, sprayer nozzles must produce different stigma pressure. Stigma
instrument should be changed in increments of 300mm in order to determine
a. the maximum osmotic
pressure of no penetration phenomenon
b. With increasing pressure
head, fabric seepage pressure change
c. The minimum pressure head
occurs "through" phenomenon, which is the minimum head of water
penetration when more than 5g
With each test a pressure
head at least three samples, calculate the average value of penetration in the
pressure head
1.2.6
Report
Record
the average. Such as greater than 5.0g, is reported as + 5.0g or> 5.0g
Summary: Strengthening standardization
waterproofing products, pay attention to the coordination of product standards,
test methods and equipment, and on the development of new high-end waterproof
and fabric moisture protection has a
good performance is very important
For more details see: http://www.qinsun-lab.com/Products/Water-repellency-tester.html
You
can follow as below, Qinsun
Instruments Co., LTD, Address:
No. 258 Banting Road, Shanghai, Zip
Code: 201199
Phone:
+86-21-6420 0566 Fax: +86-21-6420
0566-810 E-mail: info@qinsun-lab.com website: www.qinsun-lab.com.
