CN1211658C - Method for testing boiling shrinkage of high shrinkage polyester fiber - Google Patents
Method for testing boiling shrinkage of high shrinkage polyester fiber Download PDFInfo
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- CN1211658C CN1211658C CN 03132400 CN03132400A CN1211658C CN 1211658 C CN1211658 C CN 1211658C CN 03132400 CN03132400 CN 03132400 CN 03132400 A CN03132400 A CN 03132400A CN 1211658 C CN1211658 C CN 1211658C
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Abstract
The present invention relates to a testing method of the boiling shrinkage of high shrinkage polyester or modified polyester fiber filaments, wherein the shrinkage of the high shrinkage polyester or modified polyester fiber filaments is more than 15%. A sample is put into a neutral or alkaline water medium at the temperature lower than a glass-transition temperature Tg, the temperature of water is increased at a rate of 0.5 DEG C/min to 7 DEG C/min until the water is boiled, a boiling state is kept for 25 to 35 minutes, and the sample is sufficiently shrunk. After heat treatment is carried out to the sample, a balance process step is carried out. The length of the shrunk sample is measured, and is compared with data before shrinkage and treated, and therefore, the boiling shrinkage of fibers is calculated. The method overcomes the defects that the sample is directly put into boiling water to be treated in the original testing methods, and eliminates the influence on the shrinkage performance of the fibers, which is caused by the factors of different additive types and content, different fiber processing processes, and the like in a process of manufacturing polyester filaments. The test results have good repeatability, and evaluated conclusions accord with the characteristics of the fibers and are consistent with the testing and using conditions of subsequent users. The obtained results of the testing method can be directly used for face fabric design.
Description
Relate to the field
The present invention relates to the method for testing of PFY boiling water shrinkage, relate in particular to shrinkage factor is shunk the boiling water shrinkage of pure PFY or modified poly ester long filament greater than 15% height method of testing.
Background technology
Boiling water shrinkage (shrinkage) is an important performance indexes of PFY, and international chemical standard fibre office is defined as it: the decrement of the specimen length that after the stipulated time boiling water treating, takes place, represent with the percent that accounts for untreated samples length.In the BISFA standard of the world chemical standard fibre office promulgation, calculate boiling water shrinkage by the length of under the regulation pretension, measuring sample processing front and back.The polyester enterprise of present some large polyester enterprises in the world and more domestic imported technologies adopts the BISFA standard to measure the boiling water shrinkage of pure polyester or modified poly ester long filament mostly.Domestic have most of polyester enterprise in addition when measuring these performance index, employing be standard GB/T6505-2001 " filament of synthetic fibre and textured filament boiling water shrinkage test method ".
BISFA standard and GB/T6505-2001 national standard, the principle and the operation steps of two kinds of method of testings are basic identical, all are fiber sample to be relaxed state put into 100 ℃ boiling water and boiled 30 ± 5 minutes, measure the length L of sample before and after handling
0, L
S, again according to formula S={ (L
0-L
S)/L
0* 100%} calculates the boiling water shrinkage S of fiber.Practical operation shows, when these two kinds of method of testings are shunk pure PFY or modified poly ester long filament at test boiling water shrinkage S greater than 15% height, because additive types and content is different, the perhaps difference of processing technology, cause that fiber crystalline orientation performance is inconsistent, its test result is lack of consistency with the shrinkage that road product actual use in back shows.So existing these two kinds of method of testings are difficult to accurately characterize the shrinkage of high shrinkage continuous yarn, cause the evaluation deviation of high-shrinkage fibre on Fabric Design and fabric style easily, to the bigger negative effect of use formation of following process product.
Summary of the invention
The objective of the invention is to solve the above-mentioned defective of prior art and provide a kind of and shrink the method for testing of the boiling water shrinkage of pure PFY or modified poly ester long filament, utilize this method of testing can estimate the shrinkage of high-shrinkage polyester filaments more exactly at height.
Purpose of the present invention realizes by following technical solution:
A kind of method of testing of high-shrinkage polyester filaments boiling water shrinkage comprises successively: fiber samples.Preparation and processing, measurement boil boil before the length L of sample
0, boil and boil processing, measure to boil and boil the length L of back sample
SFour master operations, S={ (L by formula again
0-L
S)/L
0* 100%} calculates the boiling water shrinkage S of fiber samples; Described boiling boiled treatment process and included a in regular turn, b, three steps of c, step a puts into the test mesh bag with being relaxed state after the fiber samples doubling, step c boils to boil aftertreatment, promptly from mesh bag, take out sample, with thieving paper it is blotted, at 50～60 ℃, under the no external tension condition with sample drying 30～90 minutes, again with sample with relaxed state at standard atmospheric pressure, 18～22 ℃, relative humidity is under 62～68% conditions, carry out Balance Treatment more than 2 hours, described boiling boiled the step b of treatment process, be in container, to add an amount of neutral or the alkaline water of being with heating arrangement, water is heated, when water temperature is no more than the glass transition temperature Tg of sample, the mesh bag that sample is housed is put into water make it complete submergence, under normal pressure, water temperature is risen to 100 ℃ then, keep fluidized state, the sample in the mesh bag is boiled boil 25～35 minutes.
The method of testing of aforesaid high-shrinkage polyester filaments boiling water shrinkage, wherein said high-shrinkage polyester filaments are boiling water shrinkages greater than 15% pure PFY or modified poly ester long filament.
The method of testing of aforesaid high-shrinkage polyester filaments boiling water shrinkage, wherein said high-shrinkage polyester filaments is a boiling water shrinkage greater than 15% polyester filament, boil and boil in the processing procedure when water temperature is 20～70 ℃, the mesh bag that sample is housed is put into water, and the speed with 0.5～7 ℃/min rises to 100 ℃ with water temperature under normal pressure then.
The method of testing of aforesaid high-shrinkage polyester filaments boiling water shrinkage, the wherein said mesh bag that takes up sample are that woven bag or other can make the unfettered therein and equally distributed wrappage of aqueous medium that heat conduction is used of sample.
Adopt method of testing of the present invention, can reach following effect:
(1) eliminated in the PFY manufacture process, owing to the type of adjuvant and the equal factor of processing technology different, fiber of content cause to the filament contraction Effect on Performance, overcome the deviation that has produced when adopting BISFA standard or two kinds of method of testings of GB/T6505-2001 national standard to estimate the high-shrinkage polyester filaments shrinkage, can test PFY better---the boiling water shrinkage of high-shrinkage polyester filaments particularly.
(2) high-shrinkage polyester filaments can obtain disposable accurately evaluation in the shrinkage of different operational phases, does not need through estimating layer by layer.Aspect the shrinkage that accurately characterizes high-shrinkage polyester filaments, advantage such as have that evaluation speed is fast, accuracy is high, directiveness is strong, sample less wastage, appraisal cost are low.
(3) can accurately estimate the influence of high-shrinkage polyester filaments, can directly utilize test result to carry out design of plus material fabric style.Otherwise, also can instruct the structural behaviour of high-shrinkage polyester filaments to design and variety development according to the demand of fabric style.
Description of drawings
Fig. 1 is the test result comparison diagram of three kinds of method of testings.Wherein method 1 adopts standard GB/T6505-2001 method of testing, and method 2 is that back road user is to containing the evaluation test method of high-shrinkage polyester filaments grey cloth shrinkage factor, method 3 employings method of testing of the present invention.
Embodiment
The present invention is by putting into the heat transfer aqueous medium with the high-shrinkage polyester filaments sample before glass transition temperature Tg, seethe with excitement until aqueous medium according to suitable speed intensification, keep boiling and boil state a period of time sample is fully shunk, again through bakingout process back balance operation, measure the specimen length after shrinking, compare and handle with perisystolic data, thereby calculate the boiling water shrinkage S of this fiber.This method has overcome in original method of testing and directly sample has been dropped into the defective of handling in the middle of the boiling water, eliminated the influence of additive types different in the PFY manufacture process and content, different factors such as fibre process to the test of filament contraction rate, gained test result good reproducibility, its evaluation conclusion meets the operating characteristic of fiber itself, with afterwards road user's test and operating position match.
Further specify technical scheme of the present invention and implementation result with embodiment and Comparative Examples below.
" embodiment one "
High-shrinkage polyester FDY long filament and the yarn that contains this long filament being handled on spool stand respectively make skein silk, is under 62～68% conditions at standard atmospheric pressure, 18～22 ℃, relative humidity, carries out the thermal treatment forward horizontal stand more than 2 hours.Separately length L before measurement is boiled and boiled
0, put into mesh bag then.When water temperature is 40 ℃, the mesh bag that sample is housed is immersed in the water, with 1.7 ℃/minute speed water temperature is risen to 100 ℃, kept fluidized state 30 minutes, then mesh bag is taken out, therefrom taking out boils boils sample after the processing, with thieving paper it is blotted, under 50～60 ℃, no external tension condition with this sample drying 60～90 minutes, be under 62～68% conditions with relaxed state at standard atmospheric pressure, 18～22 ℃, relative humidity again, sample is carried out Balance Treatment more than 2 hours, the length L that measuring boils boils the back sample
S, S={ (L by formula
0-L
S)/L
0* 100%} calculates, and the boiling water shrinkage that obtains this high-shrinkage polyester FDY long filament sample is 21.6%, and the boiling water shrinkage that contains the sample of yarn of this high-shrinkage polyester FDY long filament is 20.0%.
" embodiment two "
With with embodiment one batch sample together, except the temperature of aqueous medium when the mesh bag that sample is housed drops into is that 30 ℃, the heating rate of water are 4.3 ℃/minute, to keep the time of fluidized state be 35 minutes three conditions change, other test process is identical with embodiment one with condition, the boiling water shrinkage that obtains this high-shrinkage polyester FDY long filament sample is 22.3%, and the boiling water shrinkage that contains the sample of yarn of this high-shrinkage polyester FDY long filament is 20.5%.
" embodiment three "
With with embodiment one batch sample together, except the temperature that adopts aqueous alkali to add fashionable water as heating medium, mesh bag that sample is housed is that 50 ℃, the heating rate of water are 1.2 ℃/minute, to keep the time of fluidized state be 25 minutes four conditions change, other test process is identical with embodiment one with condition, the boiling water shrinkage that obtains this high-shrinkage polyester FDY long filament sample is 22.6%, and the boiling water shrinkage that contains the sample of yarn of this high-shrinkage polyester FDY long filament is 20.8%.
" Comparative Examples one "
With method of testing of the present invention and national GB/T6505-2001 method of testing conventional polyester FDY long filament is carried out the boiling water shrinkage test comparison, the former test result is 7.5%, and latter's test result is 8.3%.
" Comparative Examples two "
With method of testing of the present invention and GB/T6505-2001 method of testing, 4 kinds of different high-shrinkage fibers and the yarn that contains these high-shrinkage fibers are carried out the boiling water shrinkage test; The grey cloth that will contain these 4 kinds of high-shrinkage filaments simultaneously carries out dyeing and finishing with same institutional framework form to be handled, and measures the door width of cloth shrinkage factor that broadwise contains the grey cloth of these 4 kinds of high-shrinkage fibres by the method for testing of back road producer.The test result of three kinds of methods sees the following form:
From three embodiment, no matter be pure high-shrinkage fibre or the yarn that contains this high-shrinkage fibre, according to method of testing provided by the invention and test condition, its test result is identical substantially, and method of testing good reproducibility of the present invention, reliability height are described.
From first Comparative Examples, when testing the boiling water shrinkage of conventional polyester FDY long filament, the test result of method of testing of the present invention and GB/T6505-2001 method of testing is more or less the same, and both are consistent basically, and through various/time test, system deviation is basicly stable.Less than 10% normal polyester long filament, method of testing of the present invention and GB/T6505-2001 national standard method of testing all can adopt less than big-difference too for shrinkage factor in this explanation.
From second Comparative Examples, the boiling water shrinkage of testing pure high-shrinkage fibre and containing the yarn of this high-shrinkage fibre according to standard GB/T6505-2001, its result and back road producer are inconsistent with the direct evaluation method of grey cloth test, the shrinkage factor size ordering of the 4 kinds of fibers of surveying is irregular, and deviation is very big.And the data that adopt method of testing of the present invention to record, high-shrinkage fibre is on all four in the relative trend of each stage shrinkage factor, and the shrinkage factor of 4 kinds of fibers is compared with the shrinkage factor of grey cloth, and its test result is basically identical also.This situation with Fig. 1 show just more intuitively, more obvious.Among Fig. 1, what method 1 adopted is standard GB/T6505-2001 method of testing, and method 2 is that back road user is to containing the evaluation test method of high-shrinkage polyester filaments grey cloth shrinkage factor, method 3 employings method of testing of the present invention.
Comparative Examples two explanations, the GB/T6505-2001 method of testing can not be made accurately for the shrinkage in the high-shrinkage fibre actual application and being estimated.If high-shrinkage fibre manufacturer is when product export, data according to the test of GB/T6505-2001 method are offered downstream user, add the man-hour high-shrinkage fibre so and big problem in fiber plying, fabric finishing process, will occur, produce big departing from the contraction situation of estimating, directly have influence on back process and back converted products.To correctly estimate the shrinkage of this fiber, just need estimate layer by layer the shrinkage factor of different operational phases such as pure high-shrinkage fibre, plying high-shrinkage yarn line, grey cloth.
And adopt method of testing of the present invention, the shrinkage that promptly can accomplish disposable accurate evaluation high-shrinkage polyester filaments, and need not estimate layer by layer.Among Fig. 1, the test result of method 3 and method 2 is very identical, consider that high-shrinkage fibre in the grey cloth is subjected to the constraint of fabric structure, and grey cloth has passed through factors such as dyeing and finishing processing, the grey cloth shrinkage factor of surveying should be slightly less than the filament contraction rate that records under the free state, and this has obtained fine embodiment in Fig. 1.It can also be seen that from Fig. 1 the grey cloth of 4 kinds of high-shrinkage fibres is compared with fiber, the reduction degree of shrinkage factor is also consistent basically, and this further specifies the better method that the present invention is a test high-shrinkage polyester filaments shrinkage factor.
Claims (4)
1. the method for testing of a high-shrinkage polyester filaments boiling water shrinkage comprises: the length L of sample before the preparation of fiber samples and processing, measurement are boiled and boiled successively
0, boil and boil processing, measure to boil and boil the length L of back sample
SFour master operations, S={ (L by formula again
0-L
S)/L
0* 100%} calculates the boiling water shrinkage S of fiber samples; Described boiling boiled treatment process and included a in regular turn, b, three steps of c, step a puts into the test mesh bag with being relaxed state after the fiber samples doubling, step c boils to boil aftertreatment, promptly from mesh bag, take out sample, with thieving paper it is blotted, at 50～60 ℃, under the no external tension condition with sample drying 30～90 minutes, again with sample with relaxed state at standard atmospheric pressure, 18～22 ℃, relative humidity is under 62～68% conditions, carry out Balance Treatment more than 2 hours, it is characterized in that: described boiling boiled the step b of treatment process, be in container, to add to be neutral or alkaline water with heating arrangement, water is heated, reach in water temperature and the mesh bag that sample is housed is put into water before the glass transition temperature Tg of sample and make it complete submergence, under normal pressure, water temperature is risen to 100 ℃ then, keep fluidized state, the sample in the mesh bag is boiled boil 25～35 minutes.
2. the method for testing of high-shrinkage polyester filaments boiling water shrinkage as claimed in claim 1 is characterized in that: described high-shrinkage polyester filaments is a boiling water shrinkage greater than 15% pure PFY or modified poly ester long filament.
3. the method for testing of high-shrinkage polyester filaments boiling water shrinkage as claimed in claim 2, it is characterized in that: described high-shrinkage polyester filaments is a boiling water shrinkage greater than 15% polyester filament, boil and boil in the processing procedure when water temperature is 20～70 ℃, the mesh bag that sample is housed is put into water, and the speed with 0.5～7 ℃/min rises to 100 ℃ with water temperature under normal pressure then.
4. as the method for testing of claim 1,2 or 3 described high-shrinkage polyester filaments boiling water shrinkages, it is characterized in that: the described mesh bag that takes up sample is that woven bag or other can make the unfettered therein and equally distributed wrappage of aqueous medium that heat conduction is used of sample.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 03132400 CN1211658C (en) | 2003-08-21 | 2003-08-21 | Method for testing boiling shrinkage of high shrinkage polyester fiber |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 03132400 CN1211658C (en) | 2003-08-21 | 2003-08-21 | Method for testing boiling shrinkage of high shrinkage polyester fiber |
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| Publication Number | Publication Date |
|---|---|
| CN1490621A CN1490621A (en) | 2004-04-21 |
| CN1211658C true CN1211658C (en) | 2005-07-20 |
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|---|---|---|---|
| CN 03132400 Expired - Lifetime CN1211658C (en) | 2003-08-21 | 2003-08-21 | Method for testing boiling shrinkage of high shrinkage polyester fiber |
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Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102914476B (en) * | 2012-09-04 | 2015-04-08 | 福建鑫华股份有限公司 | Method for online detection of polyester staple fiber shrinkage in boiling water |
| CN104777287A (en) * | 2015-03-05 | 2015-07-15 | 绍兴文理学院 | Determination method for boiling water shrinkage of viscous/spandex wrapped yarn |
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2003
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Effective date of registration: 20160206 Address after: 211900 Yizheng Changjiang Road, Jiangsu, China, No. 1, No. Patentee after: SINOPEC YIZHENG CHEMICAL FIBRE Co.,Ltd. Address before: Changjiang Road 211900 Jiangsu city of Yizheng province Xupu No. 1 Patentee before: SINOPEC Yizheng Chemical Fibre Co.,Ltd. |
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Granted publication date: 20050720 |
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