U.S. patent application number 14/566732 was filed with the patent office on 2015-10-08 for processing method of a non-pva hollow yarn and the tubular fabric.
The applicant listed for this patent is Weiguo LIU, Yanping YU. Invention is credited to Weiguo LIU, Yanping YU.
Application Number | 20150284881 14/566732 |
Document ID | / |
Family ID | 51186184 |
Filed Date | 2015-10-08 |
United States Patent
Application |
20150284881 |
Kind Code |
A1 |
YU; Yanping ; et
al. |
October 8, 2015 |
Processing Method of A Non-PVA Hollow Yarn and The Tubular
Fabric
Abstract
The invention discloses the processing method of a non-PVA fiber
hollow yarn and the tubular fabric. The fiber shall include
filament yarn, staple yarn and ribbon. The processing method
applies degradable fiber which is controllable in degradation
conditions and has none formaldehyde residue to produce hollow
yarn, in contrast with conventional soluble Vinylon hollow yarn,
which is environmentally friendly and cheap while has low shrinkage
and distinct hollow effect as can be made into high density textile
and single yarn textile through sizing process. Furthermore, the
tubular fabric as described in this invention spinned with the
non-PVA fiber hollow yarn is feature with lightness, fluffy sense,
warmth, moisture absorption and softness.
Inventors: |
YU; Yanping; (SHANGHAI,
CN) ; LIU; Weiguo; (SHANDONG PROVINCE, CN) |
|
Applicant: |
Name |
City |
State |
Country |
Type |
YU; Yanping
LIU; Weiguo |
SHANGHAI
SHANDONG PROVINCE |
|
CN
CN |
|
|
Family ID: |
51186184 |
Appl. No.: |
14/566732 |
Filed: |
December 11, 2014 |
Current U.S.
Class: |
428/36.1 ;
264/103 |
Current CPC
Class: |
D10B 2331/04 20130101;
Y10T 428/1362 20150115; D02G 3/22 20130101; D02G 3/406 20130101;
D02G 3/02 20130101; D02G 3/36 20130101 |
International
Class: |
D02G 3/22 20060101
D02G003/22; D02G 3/02 20060101 D02G003/02 |
Foreign Application Data
Date |
Code |
Application Number |
Apr 4, 2014 |
CN |
201410139731.4 |
Claims
1. Processing method of non-PVA fiber hollow yarn is featured with
the following steps: a. Process degradable fiber which is
controllable in degradation condition and has none formaldehyde
residue. The fiber should include filament yarn, staple yarn and
ribbon; b. Cover the degradable fiber which is controllable in
degradation condition and has none formaldehyde residue with outer
fiber through open-end-spinning or non-open-end-spinning. The outer
fiber should include various staple fibers to produce covering
yarn; c. Dissolve the degradable fiber which is controllable in
degradation condition and has none formaldehyde residue in the
covering yarn to produce hollow yarn; Among them, process a shall
include preparation of alkaline degradation section, preparation of
blended spinning melts and spinning procedure. In process c, the
dissolution temperature shall be 20-100.degree. C., the alkaline
concentration shall be 1.5-30 g/l, within 20 min-24 hours.
2. According to claim 1, the processing method of non-PVA fiber
hollow yarn is featured with that the preparation of alkaline
degradation section in process a shall include the following steps:
Add sodium sulfonate--isophthalic acid glycol ester at total
polymer weight of 1-20% and isophthalic acid at total polymer
weight of 1-20% during polymerization process of polyester staple
fiber, beat and stir while heating up to 230-250.degree. C. Then
move to reactor and again add in ethylene glycol at total polymer
weight of 1-20% to dilute, and cool down to 200-210.degree. C.; Add
in polyethylene glycol at molecular weight of 4000-6000 which takes
1-20% of the total weight of polymer. Complete the addition of
polyethylene glycol within 40-50 min while keep stirring. Under
room temperature, heat up to 230-250.degree. C. and make the
mixture to polymerize in vacuum condition. Then the alkaline
degradation section after polymerization and perform the cast
stripping, cooling, grain cutting, drying and selection procedures.
The intrinsic viscosity of alkaline degradation section shall be
0.55-0.75.
3. According to claim 2, the processing method of non-PVA fiber
hollow yarn is featured with that the preparation of blended
spinning melt in process a shall include the following steps: Put
the above alkaline degradationnrr section into stainless-steel
degradation kettle and stir to form spinning melt while heating.
During the preparation of spinning melt, blend degradable material
into it. The proportion by weight of alkaline degradation polymer
and degradable material shall be 100:0-60:40. Part of the
degradable material will be filtered or dissolved to form microvoid
on the fiber surface along the axes.
4. According to claim 2, the processing method of non-PVA fiber
hollow yarn is featured with that the degradable material shall
include porous agent Kaolin, degradable silicon dioxide, degradable
barium sulfate, degradable calcium carbonate or water-soluble
polyester.
5. A tubular fabric is featured with that it shall be spinned with
hollow yarn processed according to claims 1 to 4.
Description
BACKGROUND OF THE INVENTION
[0001] The invention relates to the technology field of spinning,
especially to the processing method of a non-PVA hollow yarn and
the tubular fabric.
[0002] Textile industry always creates good things to our life. The
assortment and quality of yarn is the basis of quality of textile
products. The basic assurance for enterprise survival, development
and prosperity of textile markets is to output yarns of new
varieties and good qualities as to meet and promote the quality of
textile products and ultimately to bring the companies to be
competitive in the market.
[0003] Hollow yarn carries a special hollow structure which brings
advantages of lightness and fluffy sense, warmth, moisture
absorption, softness and so on as well as excellent usability of
the product. With broad market prospects, it mainly applies for
knitted underwear, high-class towel, socks, gloves and the other
applications.
[0004] Conventional hollow yarn is proceed with technology of
covering yarn while the original yarn is characterized with bilayer
structure. It cores with soluble PVA fiber or soluble PVA staple
fiber and uses cotton or other fibers as outer coating to make into
yarn for spinning. Then, PVA yarn core is dissolved by leaving
holes in the center of yarn after post-processing of dissolution to
form a yarn with annular hollow structure. A new 100% hollow yarn
is very light and soft and characterizes new performances for
cotton textiles. For instances:
[0005] 1. Warmth and warm feeling. Generally, warmth means thermal
insulation. As air is one of the excellent thermal insulation
media, theoretically, the thermal capacity is higher when the still
air volume in the fiber is higher. Hollow yarn has excellent warmth
capacity as the yarn core is substituted by air with amount of
still air in the yarn.
[0006] 2. Excellent moisture absorption and quick drying. The air
permeability of textile depends on the spacing dimension and
quantity. Obviously, bigger and more spacing in the textile will
bring higher permeability. Hollow yarn has excellent wicking that
moisture on the skin surface will be transmitted in liquid to the
textile through wicking and be evaporated from the surface of
textile into the air for the purpose of wicking and quick
drying.
[0007] 3. Light and fluffy. As there is amount of air in the
center, hollow yarn of same size is rather fluffy and lighter than
conventional yarn.
[0008] 4. Soft. Under external force like washing or kneading, the
hollow structure will not be destroyed but still maintain the
original soft feeling.
[0009] To develop soft hollow yarn with soluble fiber is a new
technology created in these a few years. Japan has made great
succeed in development and research of cotton hollow yarn being on
the world-leading level on this project. It is reported that, Japan
companies Kurabo and Kuroray cooperates to develop cotton hollow
yarn through friction spinning technology and soluble Vinylon
fiber. AliAbar Merati and Masaaki Okamura take effort to study the
influence of the content of soluble PVA on the strength character
of hollow yarn and the variation of yarn diameter and variation
factor under axial and lateral force. Researches show that, there
is no obvious variation on strength but better elongation
performance when compare hollow yarn and conventional yarn.
However, China just starts the research on this project while
mainly uses Vinylon staple fiber of higher solution temperature to
develop hollow yarn. Professor Mingzhen Chen from Wuhan Technology
College uses Sirofil spinning technology with fine soluble Vinylon
staple fiber to spin wool hollow yarn and conducts tests to textile
products made of wool hollow yarn on their mechanical performance,
permeability and moisture absorption. Professor Huiying Ma from
Tianjin Industrial University develops hollow yarn with
conventional ring spinning technology, mainly studying on the
strength variation of yarn during vinylon dissolving and product
performances.
[0010] For the above situations, we found that foreign countries
mainly use soluble Vinylon fiber to develop hollow yarn, but in
domestic we mainly use soluble Vinylon s fiber. However, there are
a few issues as shown below for soluble Vinylon which has limited
the popularity and development of hollow yarn. 1. Soluble Vinylon
fiber is polyvinyl formal which cannot be fully dissolved in hot
water while the macromolecule inside is non-degradable. Besides,
formaldehyde is often found in the residue, which is forbidden in
some field in Europe and America at early stage; 2. Soluble Vinlyon
fiber is expensive; 3. Its dissolution process in hot water can be
specified as: The fiber gets through swelling, shrinking,
fragmenting and diffusion dissolution in hot water. However, there
is no hollow effect eventually since the shrinkage of hollow area
is distinct when the shrinkage ratio is high and the shrinkage is
over performed; 4. Covering yarn with Vinylon cannot get into
sizing process as result of the shrinkage and dissolution of
soluble Vinylon fiber in hot water, thus, they are only suitable
for low density or two fold textile.
BRIEF SUMMARY OF THE INVENTION
[0011] This invent aims to provide processing methods of a non-PVA
fiber hollow yarn specific to disadvantages of current technology.
The fiber should include filament yarn, staple yarn and ribbon. The
processing method of non-PVA hollow yarn applies degradable fiber
which is controllable in degradation conditions and has none
formaldehyde residue to produce cheap, low shrinkage covering yarn
with distinct hollow effect that can be made into high density
textile and single yarn textile through sizing process.
[0012] This invention also aims to provide a kind of tubular fabric
which is characterized with lightness, fluffy sense, warmth,
moisture absorption and softness.
[0013] To reach the above aims, the following technology solution
will help to realize the invention.
[0014] The processing method of a non-PVA fiber hollow yarn should
include the following processes:
[0015] Process degradable fiber which is controllable in
degradation condition and has none formaldehyde residue. The fiber
should include filament yarn, staple yarn and ribbon;
[0016] Cover the degradable fiber which is controllable in
degradation condition and has none formaldehyde residue with outer
fiber through open-end-spinning or non-open-end-spinning. The outer
fiber should include various staple fibers to produce covering
yarn;
[0017] Dissolve the degradable fiber which is controllable in
degradation condition and has none formaldehyde residue in the
covering yarn to produce hollow yarn;
[0018] Among them, process a shall include preparation of alkaline
degradation section, preparation of blended spinning melts and
spinning procedure. In process c, the dissolution temperature shall
be 20-100.degree. C., the alkaline concentration shall be 1.5-30
g/l, within 20 min-24 hours.
[0019] The preparation of alkaline degradation section in process a
shall include the following steps: Add sodium
sulfonate--isophthalic acid glycol ester at total polymer weight of
1-20% and isophthalic acid at total polymer weight of 1-20% during
polymerization process of polyester staple fiber, beat and stir
while heating up to 230-250.degree. C. Then move to reactor and
again add in ethylene glycol at total polymer weight of 1-20% to
dilute, and cool down to 200-210.degree. C.; Add in polyethylene
glycol at molecular weight of 4000-6000 which takes 1-20% of the
total weight of polymer. Complete the addition of polyethylene
glycol within 40-50 min while keep stirring. Under room
temperature, heat up to 230-250.degree. C. and make the mixture to
polymerize in vacuum condition. Then the alkaline degradation
section after polymerization and perform the cast stripping,
cooling, grain cutting, drying and selection procedures. The
intrinsic viscosity of alkaline degradation section shall be
0.55-0.75.
[0020] The preparation of blended spinning melt in process a shall
include the following steps: Put the above alkaline degradationnrr
section into stainless-steel degradation kettle and stir to form
spinning melt while heating. During the preparation of spinning
melt, blend degradable material into it. The proportion by weight
of alkaline degradation polymer and degradable material shall be
100:0-60:40. Part of the degradable material will be filtered or
dissolved to form microvoid on the fiber surface along the
axes.
[0021] The degradable material shall include porous agent Kaolin,
degradable silicon dioxide, degradable barium sulfate, degradable
calcium carbonate or water-soluble polyester.
[0022] A tubular fabric is spinned with hollow yarn produced
according to claims 1 to 4.
[0023] The beneficial effects of the invention are: The processing
method of a non-PVA fiber hollow yarn uses degradable fiber which
is controllable in degradation condition and has none formaldehyde
residue to produce covering yarn. By comparing with conventional
water-soluble Vinylon hollow yarn, hollow yarn prepared with this
method is featured as following: 1. The fiber in it is dissolved
under certain alkaline condition as chemical dissolution, there is
none residue and it is environmental friendly; 2. Cheap. There is
no necessary to apply additional dissolving process with natural
dissolution instead in the pre-processing of the textile; 3. The
fiber is processed under certain alkaline condition in result of
low shrinkage, while the direct dissolution has no impact on the
flatness of the textile to produce distinct hollow area; 4. The
degradable fiber which is controllable in degradation condition and
has none formaldehyde residue is not dissolute in alkali-free
suspension, thus sizing process is applicable for hollow yarn of
degradable fiber which is controllable in degradation condition and
has none formaldehyde residue, that is to say, applicable for
high-density and single yarn textile.
[0024] The other effect of this invention is that: The tubular
fabric as described in this invention spinned with the above
non-PVA fiber hollow yarn is featured with lightness, fluffy sense,
warmth, moisture absorption and softness.
DETAILED DESCRIPTION OF THE INVENTION
[0025] Below is the description of specific implementation of this
invention.
[0026] The processing method of a non-PVA fiber hollow yarn
includes the following steps:
[0027] a. Process degradable fiber which is controllable in
degradation condition and has none formaldehyde residue. The fiber
shall include filament yarn, staple yarn and ribbon;
[0028] b. Cover the degradable fiber which is controllable in
degradation condition and has none formaldehyde residue with outer
fiber through open-end-spinning or non-open-end-spinning. The outer
fiber should include various staple fibers to produce covering
yarn;
[0029] c. Dissolve the degradable fiber which is controllable in
degradation condition and has none formaldehyde residue in the
covering yarn to produce hollow yarn;
[0030] Among them, process a shall include preparation of alkaline
degradation section, preparation of blended spinning melts and
spinning procedure. In process c, the dissolution temperature shall
be 20-100.degree. C., the alkaline concentration shall be 1.5-30
g/l, within 20 min-24 hours.
[0031] The preparation of alkaline degradation section in process a
shall include the following steps: Add sodium
sulfonate--isophthalic acid glycol ester at total polymer weight of
1-20% and isophthalic acid at total polymer weight of 1-20% during
polymerization process of polyester staple fiber, beat and stir
while heating up to 230-250.degree. C. Then move to reactor and
again add in ethylene glycol at total polymer weight of 1-20% to
dilute, and cool down to 200-210.degree. C.; Add in polyethylene
glycol at molecular weight of 4000-6000 which takes 1-20% of the
total weight of polymer. Complete the addition of polyethylene
glycol within 40-50 min while keep stirring. Under room
temperature, heat up to 230-250.degree. C. and make the mixture to
polymerize in vacuum condition. Then the alkaline degradation
section after polymerization and perform the cast stripping,
cooling, grain cutting, drying and selection procedures. The
intrinsic viscosity of alkaline degradation section shall be
0.55-0.75.
[0032] The preparation of blended spinning melt in process a shall
include the following steps: Put the above alkaline degradationnrr
section into stainless-steel degradation kettle and stir to form
spinning melt while heating. During the preparation of spinning
melt, blend degradable material into it. The proportion by weight
of alkaline degradation polymer and degradable material shall be
100:0-60:40. Part of the degradable material will be filtered or
dissolved to form microvoid on the fiber surface along the
axes.
[0033] The degradable material shall include porous agent Kaolin,
degradable silicon dioxide, degradable barium sulfate, degradable
calcium carbonate or water-soluble polyester.
[0034] Production of non-PVA fiber hollow yarn. The first step is
to produce covering yarn which is combined by two different kinds
of fibers separately on outer layer and core layer when the outer
fiber tightly covers on degradable fiber which is controllable in
degradation condition and has none formaldehyde residue by applying
open-end-spinning or non-open-end-spinning which includes
conventional ring spinning, siro spinning, compact spinning, murata
vortex spinning, friction spinning and the other. For instance, a
modified ring spinning frame for non-open-end spinning can be used
to produce covering yarn. The degradable fiber which is
controllable in degradation condition and has none formaldehyde
residue runs through yarn guides and directly feeds into front
roller through integral edger instead of through the collector of
front roller. The covering cotton fiber should cover on the surface
of degradable fiber which is controllable in degradation condition
and has none formaldehyde residue by conventional spinning way.
When the back end of cotton fiber leaves the plier of front roller,
the tension generated is decreased, but the degradable fiber which
is controllable in degradation condition and has none formaldehyde
residue still remains in the position between winding points of the
guide while keeping its tension, therefore, the cotton fiber is
covered on the surface of the yarn core. Then twist and wind the
yarn to complete the spinning process.
[0035] A tubular fabric is spinned with non-PVA fiber hollow yarn
processed according to the above method. Since hollow yarn fabric
is made by covering yarn, before clearing degradable non-PVA fiber,
the fabric shall not be a genuine hollow yarn fabric, instead, it
should be conducted with a series of processes, including
dissolution, to dissolve degradable non-PVA fiber from the hollow
yarn.
[0036] A tubular fabric can be produced through regular spinning
process, that is to spin the textile with covering yarn, or go
through sizing before spinning into textile including knitting
fabric and woven fabric.
[0037] The dissolution process of covering yarn fabric shall
depends on various fabric types and processing conditions.
According to product requirements of covering yarn fiber, the
dissolution condition is controllable and has a wide range. For
instance, the temperature shall be 20-100.degree. C., the alkali
concentration shall be 1.5-30 g/l, within 20 min-24 hours.
[0038] The above content is only about the better implementation
cases of the invent. General technicians of this field may make
modifications to the specific implementation way or application
range according to the concept of the invention. The content in
this description shall not be interpreted as a restriction of the
invention.
* * * * *