The dimensional change rate influencing factors, the choice of washing and drying procedures. . . Music in Japan

The definition of one dimensional changes,


the dimensional change rate refers to the textiles after washing and drying, its the size of the length and the width change, usually expressed as the percentage of the original size change.


2, the factors influencing the dimensional change rate


1, the influence of the fiber composition


hygroscopicity larger fabrics, fibre after flooding will produce inflation, which resulted in increased its diameter, length is shorten, shrink condition is obvious. Bibulous rate is bigger, such as viscose fiber such as hygroscopicity big fabric, after washing will have serious shrink. And synthetic fabrics, such as polyester and polypropylene fiber, such as their hygroscopicity is poorer, the dimensional changes so there would be small.

2, the influence of fabric structure,


in general, the size stability of the woven fabric is better than knitted fabric; High density fabric dimensional stability is better than low density. In the woven fabric, the size of general plain cloth rate is less than the flannel fabric ( With a kind of soft and ZhiZhi of carded wool yarn has the suede wool fabric) ; The dimensional changes and knitted fabrics, flat organization and is less than the rib fabric.


3, the influence of production technology,


the fabric production process is not the same, the dimensional changes leading to different. Fabric in the process of production accumulated residual deformation, large internal stress, the dimensional changes of fabric is big also.


4, the impact of wool fabric fulling


wool surface is scales, after washing, the scales will inevitably damage, so we will produce the problem such as to reduce the deformation. So the sweater is a kind of special need to pay attention to shrink problem fabric.


5, washing the influence of the nursing process


wash care including washing, drying, ironing, the three steps of each step will affect the fabric shrinkage. Such as hand washing sample stability is superior to the maximum size of the sample, and washing temperature also affects the size stability. In general, the higher the temperature, the stability is poor. Samples of drying methods on the fabric shrinkage is bigger. There are four kinds of commonly used dry way: drip dry method, method of metal mesh tile, hang dry, dry method and drum drying method. One drop of water, dry method of least affected by the size of the fabric, and the drum arch dry process had the greatest influence on the size of the fabric, the rest two center. In addition, according to the composition of fabric to choose a suitable ironing temperature, also can improve the shrinkage of fabric. So choose reasonable care labels to washing clothes is very important.


the relevant national standard


GB/T 8628 - 2013 textile testing the size change of trial of garments and fabric sample preparation, tags and measurement

GB/T 8629 - 2001 textile test using household cleaning and drying procedure

GB/T 8630 - 2013 textile washing and drying after the determination of the size change of

GB/T 8878 - 2014 cotton knitted underwear

GB/T 22848 - 2009 knitting of the finished fabric washing method and dry method of product standards

with the GB/T8629 - 2001 textile test with family washing and drying procedures specified in the platen washing machine washing method and dry method, the following table:


the washing program and dry





3, washing and drying procedure how to choose?


product standards commonly used cleaning method and dry method of




the table shows that the current use of clothing product standards, product standards for many, it was stipulated that the washing method and dry method, with some product standards specified in the washing and drying methods are also very clear, for example the FZ/T 73026 - 2014 knit dress and skirt set of rules for general washing method and dry method, also provides the washing method of different categories of fiber content and drying methods.


but there is some product standards, there is no express corresponding washing method and dry method, such as 'FZ/T 81010 - 2009 dust coat 'and' GB/T 2662 - 2008 cotton clothing, 'there is no express. Such detection in the detection of don't know how to select the corresponding cleaning method and dry method to test. In general, the product standard in the case of does not provide a washing method, similar products based on their testing standard, choice of fabric content or wash water standard test method, but this will generate understanding differences, resulting in different test methods. Therefore, suggest to develop product standards, clear the corresponding method of washing and drying.


in the test, also with clothing products will meet the customer standard to test the fabric dimensional changes of, and demand the dimensional changes of fabrics were assessed. Dimensional changes but the fabric is not fully reflect the dimensional changes of fabrics made of finished goods is good or bad, because the fabric in the process of made clothing, passes through preshrinking, sewing processing, and the corresponding ironed, the dimensional changes that will change clothes, therefore, suggest that if you meet with the dimensional changes of clothing product standards to detect fabric, not the size changes to assess, only reference value to the customer to provide the corresponding test.