CN114908469B

CN114908469B - Shape memory warp knitting formed medical arm protective sleeve and production process thereof

Info

Publication number: CN114908469B
Application number: CN202210696408.1A
Authority: CN
Inventors: 万爱兰; 王雅倩; 蒋高明; 丛洪莲; 马丕波; 李奇鑫
Original assignee: Jiangnan University
Current assignee: Jiangnan University
Priority date: 2022-06-20
Filing date: 2022-06-20
Publication date: 2023-06-13
Anticipated expiration: 2042-06-20
Also published as: CN114908469A

Abstract

The invention discloses a shape memory warp knitting forming medical arm protective sleeve and a production process thereof, and belongs to the technical field of textile medical. The invention relates to a process for producing a shape memory warp knitting forming medical arm protective sleeve, which is to weave an integrated fabric with a warp knitting mesh structure by using a 12-bar double-needle bar warp knitting machine, wherein the shape memory warp knitting forming medical arm protective sleeve is divided into 4 parts, and comprises a 1 st part of substrate part, a 2 nd part of connecting part, a 3 rd part of opening part and a 4 th part of opening edge connecting part, wherein the opening edge connecting part connects the opening part, the opening part is arranged in the middle of the substrate part, and the connecting part connects the substrate part into a cylinder shape. The double needle bed raschel knitting machine is adopted to form once, and cutting and sewing are not needed again; and is light, thin and breathable; but also solves the problems that the prior art can not prevent the arms of the patient from being tampered with and can not prevent the patient from being pressed by the patient to the venous indwelling needle during sleeping.

Description

Shape memory warp knitting formed medical arm protective sleeve and production process thereof

Technical Field

The invention relates to a shape memory warp knitting forming medical arm protective sleeve and a production process thereof, belonging to the technical field of textile medical use.

Background

Medical supplies are a generic term for items used to treat wounds or to treat diseases. When the arm of a human body is wounded, a medical dressing is often used for bandaging, and a medical adhesive tape is used for fixing the dressing. Most people in real life often cause pollution and the drop of dressing because of the frequent use of arm, especially in hot summer, sweat secretion can destroy medical sticky tape and arm's bonding to the drop of dressing is accelerated, can not carry out effectual treatment and protection to the wound face. Medical tapes also present a puzzlement of itching and allergies to some people who are sensitive to skin.

In order to fix and protect the wound dressing, a few simple protective arm protective sleeves are available on the market, and most of the protective sleeves are provided with binding force by using polyurethane fibers, so that the wound parts of the arms can be protected, and even if the product is provided with a conventional size range because of the change of the dimensions of the arms of the human body, the pressure is too large due to the mismatching of the binding force and the dimensions of the arms of the human body, the healing of the wound is affected, and the comfort is reduced. Therefore, it is necessary to develop a medical external fixation material which is easy to operate, good in performance and high in comfort.

In addition, the venous indwelling needle consists of a stainless steel core, a soft outer sleeve and a plastic needle seat, the outer sleeve and the needle core are penetrated into a blood vessel together during puncturing, and after the sleeve is sent into the blood vessel, the needle core is pulled out, and only the soft outer sleeve is left in the blood vessel for transfusion; when the vein detaining needle is arranged on the arm of the patient, the arm of the patient cannot be tampered, once the vein detaining needle is tampered, the wall of a blood vessel is easy to puncture, and the vein detaining needle is easy to be pressed by the other hand of the patient during sleeping, so that the vein detaining needle is caused to fall off; it can be seen that control of the venous indwelling needle is critical; the vein detaining needle needs the medical external fixing material to have corresponding holes corresponding to the external fixing material, otherwise, no way is provided at all for fixing; this requirement for medical external fixation materials is also higher.

Disclosure of Invention

[ technical problem ]

The existing protective arm protective sleeve is excessively high in pressure due to mismatching of binding force and human arm size, so that wound healing is affected, and comfortableness is reduced.

Technical scheme

In order to solve the problems, the invention utilizes the warp knitting technology to produce the shape memory warp knitting formed medical arm protective sleeve. The nylon/shape memory spandex core-spun yarn adopted by the invention takes the human body temperature as the switching temperature, and when the medical arm protective sleeve is sleeved on an arm, the nylon/shape memory spandex core-spun yarn can be reversibly restored to the original state and restore the elasticity, so that the medical arm protective sleeve prepared from the nylon/shape memory spandex core-spun yarn is easier to pull and deform before wearing, can restore the elasticity and start to shrink under the influence of the human body temperature after wearing, generates additional pressure, and provides binding force for wound dressing or limbs so as to play a binding and fixing role. Compared with the conventional arm protective sleeve, the medical arm protective sleeve formed by the shape memory warp knitting can be formed at one time due to the special warp knitting process; the nylon/shape memory spandex core-spun yarn is applied to the design of the medical arm protective sleeve, and can spontaneously change the clothing structure according to the external environment change due to the shape memory effect, so that the contradiction between the protection performance and the comfort performance of the medical arm protective sleeve is solved.

The first object of the invention is to provide a process for producing a shape memory warp knitting formed medical arm protective sleeve, which is to weave an integrated fabric with warp knitting mesh structure by using a 12-bar double needle bar warp knitting machine, wherein the shape memory warp knitting formed medical arm protective sleeve is divided into 4 parts, and comprises a 1 st part substrate part, a 2 nd part connecting part, a 3 rd part opening part and a 4 th part opening edge connecting part; the open edge connecting part connects the open parts, the open parts are arranged in the middle of the base material part, and the connecting part connects the base material part into a cylinder; the base material part is knitted by 6 guide bars, the guide bars GB1 and GB7 penetrate nylon/shape memory spandex core-spun yarns, knitting chain tissues are adopted to respectively fill yarns on a front needle bed and a back needle bed, the guide bars GB2 and GB3 are fully penetrated, only the front needle mattress yarns are used for forming a warp knitting mesh structure, and the guide bars GB8 and GB9 are used for filling yarns on the back needle bed to form mesh tissues; the structure of the connecting part and the base material part is the same, and the threading modes are different; the open hole part is formed by knitting 10 guide bars, the guide bars GB1 and GB7 are respectively provided with nylon/shape memory spandex core-spun yarns, the guide bars GB2, GB3, GB5, GB6, GB8, GB9, GB11 and GB12 are respectively provided with nylon yarns, the GB1 guide bar adopts an open knitting chain structure, the GB2 guide bar and the GB3 guide bar are respectively provided with two symmetrical guide bars with opposite yarn-filling directions, the guide bars respectively adopt an open knitting chain structure, the GB5 guide bar is different from the GB1 in that the GB5 is different in the displacement across the needle backs, the GB5 is also provided with a front needle mattress yarn, the GB6 adopts a variable knitting chain structure and is provided with a front needle mattress yarn, the GB7 and the GB1 are identical in structure, the GB8 and the GB2 are identical in structure, the GB9 and the GB3 are respectively provided with yarn-filling in the back needle bed, the GB11 and the GB5 are identical in structure, and the GB12 and the GB6 are both arranged in the back needle bed yarn to jointly form the open hole part; the open hole edge connecting part is formed by knitting 2 guide bars, the guide bar GB4 is formed by knitting warp knitting and opening knitting chains on the front needle mattress yarn, the guide bar GB10 is formed by knitting the same knitting structure on the back needle bed yarn, and the open hole parts are connected.

In one embodiment of the invention, the process for producing the shape memory warp knitting formed medical arm protective sleeve specifically comprises the following steps:

(1) Selecting materials: nylon/shape memory spandex core-spun yarn and nylon yarn are selected as raw materials;

(2) Warping: the nylon/shape memory spandex core-spun yarn and the nylon yarn are beamed according to the requirements of width and transverse density on a computerized copy warping machine according to a certain head part;

(3) Weaving: weaving by adopting a 12-comb double needle bed raschel warp knitting machine;

(4) And (3) post-finishing: (1) shaping; (2) cooling;

(5) And (5) detecting and packaging.

Wherein, single comb texture structure and threading mode in the warper and weave are:

part 1 substrate portion:

GB1 comb: 0-1-1/1-0-0-0//, 1 is 7 blank;

GB2 comb: 1-0-0/1-2-2/2-3-3/2-1-1//, full penetration;

GB3 comb: 2-3-3/2-1-1/1-0-0/1-2-2//, full penetration;

GB7 comb: 0-0-0-1/1-1-1-0//,1 is 7 blank; the method comprises the steps of carrying out a first treatment on the surface of the

GB8 comb: 1-1-1/1-1-1-2/2-2-2-3/2-2-2-1//, full of wear;

GB9 comb: 2-2-2-3/2-2-2-1/1-1-1-2//, full penetration;

part 2 attachment portion:

GB1 comb: 0-1-1/1-0-0-0//, 1 is 2 empty;

GB2 comb: 1-0-0/1-2-2/2-3-3/2-1-1//, full penetration;

GB3 comb: 2-3-3/2-1-1/1-0-0/1-2-2//, full penetration;

GB7 comb: 0-0-0-1/1-1-1-0//,1 is 2 empty;

GB8 comb: 1-1-1/1-1-1-2/2-2-2-3/2-2-2-1//, full of wear;

GB9 comb: 2-2-2-3/2-2-2-1/1-1-1-2//, full penetration;

part 3 aperture portion:

GB1 comb: 0-1-1/1-0-0-0//, 1 is 2 empty;

GB2 comb: 1-0-0/1-2-2/2-3-3/2-1-1//, full penetration;

GB3 comb: 2-3-3/2-1-1/1-0-0/1-2-2//, full penetration;

GB5 comb: 0-0-0/4-4-4//, 3 empty, 1 through, 3 empty;

GB6 comb: 0-0-0-0/4-4-4/0-0-0/4-4-4//, 6 empty, 1 pass;

GB7 comb: 0-0-0-1/1-1-1-0//,1 is 2 empty;

GB8 comb: 1-1-1/1-1-1-2/2-2-2-3/2-2-2-1//, full of wear;

GB9 comb: 2-2-2-3/2-2-2-1/1-1-1-2//, full penetration;

GB11 comb: 0-0-0/4-4-4//, 3 empty, 1 through, 3 empty;

GB12 comb: 0-0-0-0/4-4-4/0-0-0/4-4-4//, 6 empty, 1 pass;

part 4 aperture edge connection:

GB4 comb:

2-3-3/1-0-0-0/2-3-3/1-0-0/0-0 3-3-3/1-0-0/2-3-3/3-2-2-2/2-3-3/3-2-2/2-2-2///-, full wear;

GB10 comb:

2-2-3/1-1-1/2-2-3/1-1-0/1-2-1-3/1-1-2/2-3/1-1-1-0/2-2-3/1-1-1-2-2/1-1-2/1-2-3/1-1-2-1/1-1-0/2-2-1-1/2-1-0/2-2-3/1-1-1-0/2-2-2-3/3-3-3/2-3-2/2-2-3/3-2-3/3-3/2-2///, is fully inflated.

In one embodiment of the invention, the yarn composition adopted by the single comb structure in the process for producing the shape memory warp knitting formed medical arm protective sleeve is as follows:

GB1 comb: 210-560D nylon/shape memory spandex core-spun yarn;

GB2 comb: 70-140D nylon yarns;

GB3 comb: 70-140D nylon yarns;

GB4 comb: 40-70D nylon yarn;

GB5 comb: 70-140D nylon yarns;

GB6 comb: 70-140D nylon yarns;

GB7 comb: 210-560D nylon/shape memory spandex core-spun yarn;

GB8 comb: 70-140D nylon yarns;

GB9 comb: 70-140D nylon yarns;

GB10 comb: 40-70D nylon yarn;

GB11 comb: 70-140D nylon yarns;

GB12 comb: 70-140D nylon yarn.

In one embodiment of the invention, the covering process of the nylon/shape memory spandex covering yarn comprises the following steps: taking shape memory spandex as a core and nylon as an outer covering yarn, spinning by adopting a draft ratio of 3.0-4.0 and a twist of 200-1000 twists/m to obtain the nylon/shape memory spandex covering yarn.

In one embodiment of the invention, the shape memory spandex bare yarn in the nylon/shape memory spandex core-spun yarn is 40D-210D; the switch temperature is 32 ℃, and the shape memory function can be triggered when the ambient temperature is higher than 32 ℃; namely: the shape memory spandex has weak restoring force below room temperature (25 ℃) and shows weak rebound, and meanwhile, the deformation (stretched length) of the spandex yarn can be fixed to a certain degree under the temperature condition, and the spandex yarn can not be restored to the shape (length) before being stretched immediately; when the temperature of the shape memory spandex itself approaches the temperature of the human body (32 ℃ or above), the spandex can be restored to its shape (length) before being stretched in a short time, and the elasticity can be restored.

In one embodiment of the invention, the nylon in the nylon/shape memory spandex core-spun yarn is semi-gloss nylon with the specification of 70D/48F.

In one embodiment of the invention, the ratio of the yarn composition adopted by the single comb structure in the process for producing the shape memory warp knitting formed medical arm protective sleeve is as follows:

25-55% of nylon/shape memory spandex core-spun yarn; 45-75% of chinlon; "%" is mass percent.

In one embodiment of the invention, the warping is performed according to the requirements of the width, the transverse density and the yarn penetration rate; the warping temperature is 25+/-2 ℃ and the relative humidity is 65+/-3%.

In one embodiment of the invention, the weaving is to input the tissue yarn-laying number, the warp feeding amount, the pulling density and the like into a computer display screen of a control cabinet, store and load an on-machine file, and start up; and (5) weaving to obtain the grey cloth, weighing, bagging and warehousing.

In one embodiment of the invention, the shaping is performed by a shaping machine, and the oven temperature is 190 ℃.

In one embodiment of the invention, the square meter gram weight of the shape memory warp knitting formed medical arm protecting sleeve is 200-430 g/m ² 。

The second purpose of the invention is to produce the shape memory warp knitting formed medical arm protective sleeve by the process.

The third object of the invention is the application of the shape memory warp knitting formed medical arm protecting sleeve in the field of medical supplies.

A fourth object of the present invention is to provide a method of securing a wound dressing which uses the shape memory warp knit shaped medical arm protective sheath of the present invention.

In one embodiment of the invention, the method is to apply the shape memory warp knitting formed medical arm protective sleeve to the surface of the wound dressing.

A fifth object of the present invention is to provide a method for fixing a venous indwelling needle, which uses the shape memory warp knitting shaped medical arm protecting sleeve of the present invention.

In one embodiment of the invention, the method is to fix the venous indwelling needle in the opening part of the shape memory warp knitting formed medical arm protecting sleeve.

[ advantageous effects ]

(1) The base material of the shape memory warp knitting formed medical arm protective sleeve is nylon/shape memory spandex core-spun yarn, wherein the shape memory spandex is produced by controlling the content of a hard segment and the molecular weight of a soft segment, and the shape memory polyurethane is prepared by combining a spinning process, has the physical and mechanical properties of conventional fibers, is simple and environment-friendly in process, and can realize industrialization in continuous production.

(2) The double needle bed raschel knitting machine is adopted to form once, and cutting and sewing are not needed again; a unique mesh tissue structure can be formed, so that the medical arm protective sleeve is light, thin and breathable; and the unique hole design (the 3 rd part and the 4 th part) is suitable for the venous indwelling needle, and can solve the problems that the arm of a patient cannot be prevented from being tampered with and the venous indwelling needle cannot be prevented from being pressed by the patient when the patient sleeps.

(3) The medical arm protective sleeve with the shape memory warp knitting formed by the invention uses the characteristics that the nylon/shape memory spandex core-spun yarn takes the body temperature as the switch temperature, and the shape memory effect is triggered on the arm, so that the medical protective glove starts to shrink when contacting the skin of the human body, and can provide binding force for wound dressing or limbs to achieve the functions of binding and fixing; the medical adhesive tape overcomes the trouble of allergy caused by medical adhesive tape, is loose before the arm is sleeved, contracts due to body temperature after the arm is sleeved, overcomes the difficulty of unmatched constraint force and arm dimension, and meets the requirements of functionality and comfort.

Drawings

Fig. 1 is a physical diagram of a medical arm protective sleeve formed by shape memory warp knitting after being tiled (split).

Figure 2 is a physical diagram of a shape memory warp knitted formed medical arm protective sleeve,

figure 3 is an application of mesh of a shape memory warp knit formed medical arm protective sheath.

Detailed Description

The following description of the preferred embodiments of the present invention is provided for better illustration of the invention, and should not be construed as limiting the invention.

The testing method comprises the following steps:

elasticity test:

according to FZ/T70006-2004 method for testing tensile elastic recovery of knitted fabrics, an YG028 multifunctional electronic fabric strength machine is adopted to test elastic recovery performance. Wherein the clamping distance is set to 100mm, the stretching speed is 100mm/min, the return speed is 50mm/min, the constant elongation is set to 50%, the pre-tension is 1N, and the process is repeated for 1 time. The test specimen is stretched to a constant elongation at a set rate, the stretching stopping time is 60s, then the test specimen is returned to the initial gauge at the original rate, the stretching recovery time is 180s, the test specimen is tested at the ambient temperature of 20 ℃ and 34 ℃ respectively, the elastic recovery rate of the test specimen is recorded, and the arithmetic average value is taken as the experimental result.

The raw materials used in the examples:

the preparation method of the nylon/shape memory spandex (common spandex) core-spun yarn comprises the following steps:

the shape memory spandex (common spandex) with the specification of 140D is taken as a core, the semi-gloss nylon with the specification of 70D/48F is taken as an outer covering yarn, and the drafting ratio is 4.0; spinning with twist of 600 twist/m to obtain the core-spun yarn.

Example 1

A process for producing a shape memory warp knitting formed medical arm protective sleeve, comprising the following steps:

(1) Selecting materials: selecting 280D nylon/shape memory spandex core-spun yarn and 140D nylon DTY yarn as raw materials; 40% of 280D nylon/shape memory spandex core-spun yarn, 60% of 140D nylon DTY yarn and the weight percentage of "%;

(2) Warping: the nylon/shape memory spandex core-spun yarn and the nylon yarn are beamed according to the requirements of width and transverse density on a computerized copy warping machine according to a certain head part; temperature and humidity of warping site: the temperature is 25+/-2 ℃ and the relative humidity is 65+/-3%;

the warping machine is provided with a hydraulic damping compensation tensioner, so that the requirement of warp knitting warping on tension is met;

(3) Weaving:

model: double needle bed raschel machine RD12N;

number of machine: 22 needles/25.4 mm;

width of door: 138 inches;

the single comb structure and the threading mode are as follows:

part 1 substrate portion:

GB1 comb: 0-1-1/1-0-0-0//, 1 is 7 blank;

GB2 comb: 1-0-0/1-2-2/2-3-3/2-1-1//, full penetration;

GB3 comb: 2-3-3/2-1-1/1-0-0/1-2-2//, full penetration;

GB8 comb: 1-1-1/1-1-1-2/2-2-2-3/2-2-2-1//, full of wear;

GB9 comb: 2-2-2-3/2-2-2-1/1-1-1-2//, full penetration;

part 2 attachment portion:

GB1 comb: 0-1-1/1-0-0-0//, 1 is 2 empty;

GB2 comb: 1-0-0/1-2-2/2-3-3/2-1-1//, full penetration;

GB3 comb: 2-3-3/2-1-1/1-0-0/1-2-2//, full penetration;

GB7 comb: 0-0-0-1/1-1-1-0//,1 is 2 empty;

GB8 comb: 1-1-1/1-1-1-2/2-2-2-3/2-2-2-1//, full of wear;

GB9 comb: 2-2-2-3/2-2-2-1/1-1-1-2//, full penetration;

part 3 aperture portion:

GB1 comb: 0-1-1/1-0-0-0//, 1 is 2 empty;

GB2 comb: 1-0-0/1-2-2/2-3-3/2-1-1//, full penetration;

GB3 comb: 2-3-3/2-1-1/1-0-0/1-2-2//, full penetration;

GB5 comb: 0-0-0/4-4-4//, 3 empty, 1 through, 3 empty;

GB6 comb: 0-0-0-0/4-4-4/0-0-0/4-4-4//, 6 empty, 1 pass;

GB7 comb: 0-0-0-1/1-1-1-0//,1 is 2 empty;

GB8 comb: 1-1-1/1-1-1-2/2-2-2-3/2-2-2-1//, full of wear;

GB9 comb: 2-2-2-3/2-2-2-1/1-1-1-2//, full penetration;

GB11 comb: 0-0-0/4-4-4//, 3 empty, 1 through, 3 empty;

GB12 comb: 0-0-0-0/4-4-4/0-0-0/4-4-4//, 6 empty, 1 pass;

part 4 aperture edge connection:

GB4 comb:

GB10 comb:

2-2-3/1-1-1/2-2-3/1-1-0/1-1-2-3/1-1-2/1-1-0/2-2-3/1-1-1-2-2/1-1-1-2/1-2-3/1-1-2-1/1-1-0/2-2-1-1/2-1-0/2-2-3/1-1-1-0/2-2-2-3/3-3-3/2-2-3/3-3-3-2/2-2-2-3/3-2-3/3-2///, is fully satisfied;

the yarn composition adopted by the single comb structure is as follows:

part 1 substrate portion:

GB1 comb: 280D nylon/shape memory spandex core-spun yarn;

GB2 comb: 140D nylon DTY;

GB3 comb: 140D nylon DTY;

GB7 comb: 280D nylon/shape memory spandex core-spun yarn;

GB8 comb: 140D nylon DTY;

GB9 comb: 140D nylon DTY;

part 2 attachment portion:

GB1 comb: 280D nylon/shape memory spandex core-spun yarn;

GB2 comb: 140D nylon DTY;

GB3 comb: 140D nylon DTY;

GB7 comb: 280D nylon/shape memory spandex core-spun yarn;

GB8 comb: 140D nylon DTY;

GB9 comb: 140D nylon DTY;

part 3 aperture portion:

GB1 comb: 280D nylon/shape memory spandex core-spun yarn;

GB2 comb: 140D nylon DTY;

GB3 comb: 140D nylon DTY;

GB5 comb: 140D nylon DTY;

GB6 comb: 140D nylon DTY;

GB7 comb: 280D nylon/shape memory spandex core-spun yarn;

GB8 comb: 140D nylon DTY;

GB9 comb: 140D nylon DTY;

GB11 comb: 140D nylon DTY;

GB12 comb: 140D nylon DTY;

part 4 aperture edge connection:

GB4 comb: 70D nylon DTY;

GB10 comb: 70D nylon DTY;

inputting the tissue yarn-laying number, the warp feeding amount, the pulling density and the like into a computer display screen of a control cabinet, storing and loading an on-machine file, and starting; the weaving is completed to obtain grey cloth, weighing, bagging and blank warehousing are carried out;

(4) And (3) post-finishing:

(1) shaping; shaping by a shaping machine, wherein the temperature of an oven is 190 ℃;

(2) cooling;

(5) And (5) detecting and packaging.

Comparative example 1

A process for producing a warp knit shaped medical arm protective sleeve comprising the steps of:

(1) Selecting materials: selecting 280D nylon/common spandex core-spun yarn and 140D nylon DTY yarn as raw materials; the ratio of the 280D nylon/common spandex core-spun yarn is 40%, the ratio of the 140D nylon DTY yarn is 60%, and the "%" is the mass percentage;

(2) Warping: the method comprises the steps of (1) warping nylon/common spandex core-spun yarn and nylon yarn according to the requirements of width and transverse density on a computerized copy warping machine according to a certain part; temperature and humidity of warping site: the temperature is 25+/-2 ℃ and the relative humidity is 65+/-3%;

(3) Weaving:

model: double needle bed raschel machine RD12N;

number of machine: 22 needles/25.4 mm;

width of door: 138 inches;

the single comb structure and the threading mode are as follows:

part 1 substrate portion:

GB1 comb: 0-1-1/1-0-0-0//, 1 is 7 blank;

GB2 comb: 1-0-0/1-2-2/2-3-3/2-1-1//, full penetration;

GB3 comb: 2-3-3/2-1-1/1-0-0/1-2-2//, full penetration;

GB8 comb: 1-1-1/1-1-1-2/2-2-2-3/2-2-2-1//, full of wear;

GB9 comb: 2-2-2-3/2-2-2-1/1-1-1-2//, full penetration;

part 2 attachment portion:

GB1 comb: 0-1-1/1-0-0-0//, 1 is 2 empty;

GB2 comb: 1-0-0/1-2-2/2-3-3/2-1-1//, full penetration;

GB3 comb: 2-3-3/2-1-1/1-0-0/1-2-2//, full penetration;

GB7 comb: 0-0-0-1/1-1-1-0//,1 is 2 empty;

GB8 comb: 1-1-1/1-1-1-2/2-2-2-3/2-2-2-1//, full of wear;

GB9 comb: 2-2-2-3/2-2-2-1/1-1-1-2//, full penetration;

part 3 aperture portion:

GB1 comb: 0-1-1/1-0-0-0//, 1 is 2 empty;

GB2 comb: 1-0-0/1-2-2/2-3-3/2-1-1//, full penetration;

GB3 comb: 2-3-3/2-1-1/1-0-0/1-2-2//, full penetration;

GB5 comb: 0-0-0/4-4-4//, 3 empty, 1 through, 3 empty;

GB6 comb: 0-0-0-0/4-4-4/0-0-0/4-4-4//, 6 empty, 1 pass;

GB7 comb: 0-0-0-1/1-1-1-0//,1 is 2 empty;

GB8 comb: 1-1-1/1-1-1-2/2-2-2-3/2-2-2-1//, full of wear;

GB9 comb: 2-2-2-3/2-2-2-1/1-1-1-2//, full penetration;

GB11 comb: 0-0-0/4-4-4//, 3 empty, 1 through, 3 empty;

GB12 comb: 0-0-0-0/4-4-4/0-0-0/4-4-4//, 6 empty, 1 pass;

part 4 aperture edge connection:

GB4 comb:

GB10 comb:

the yarn composition adopted by the single comb structure is as follows:

part 1 substrate portion:

GB1 comb: 280D nylon/common spandex core-spun yarn;

GB2 comb: 140D nylon DTY;

GB3 comb: 140D nylon DTY;

GB7 comb: 280D nylon/common spandex core-spun yarn;

GB8 comb: 140D nylon DTY;

GB9 comb: 140D nylon DTY;

part 2 attachment portion:

GB1 comb: 280D nylon/common spandex core-spun yarn;

GB2 comb: 140D nylon DTY;

GB3 comb: 140D nylon DTY;

GB7 comb: 280D nylon/common spandex core-spun yarn;

GB8 comb: 140D nylon DTY;

GB9 comb: 140D nylon DTY;

part 3 aperture portion:

GB1 comb: 280D nylon/common spandex core-spun yarn;

GB2 comb: 140D nylon DTY;

GB3 comb: 140D nylon DTY;

GB5 comb: 140D nylon DTY;

GB6 comb: 140D nylon DTY;

GB7 comb: 280D nylon/common spandex core-spun yarn;

GB8 comb: 140D nylon DTY;

GB9 comb: 140D nylon DTY;

GB11 comb: 140D nylon DTY;

GB12 comb: 140D nylon DTY;

part 4 aperture edge connection:

GB4 comb: 70D nylon DTY;

GB10 comb: 70D nylon DTY;

(4) And (3) post-finishing:

(2) cooling;

(5) And (5) detecting and packaging.

The medical arm protective sleeves obtained in example 1 and comparative example 1 were subjected to performance tests, and the test results are shown in table 1 below:

TABLE 1 elastic recovery

Example(s)	20℃	34℃
			Example 1	56.78％	89.67％
Comparative example 1	90.34％	90.51％

As can be seen from table 1: in example 1, since the shape memory spandex was used, the elastic recovery rate was significantly changed below and above the switching temperature, whereas in comparative example 1, the conventional spandex was used, so there was substantially no change, and the elastic recovery rate of example 1 was comparable to that of comparative example 1 when the switching temperature was reached.

Comparative example 2

(3) Weaving:

model: double needle bed raschel machine RD12N;

number of machine: 22 needles/25.4 mm;

width of door: 138 inches;

the single comb structure and the threading mode are as follows:

part 1 base part:

GB1 comb: 0-1-1/1-0-0-0//, 1 is 7 blank;

GB2 comb: 1-0-0/1-2-2/2-3-3/2-1-1//, full penetration;

GB3 comb: 2-3-3/2-1-1/1-0-0/1-2-2//, full penetration;

GB8 comb: 1-1-1/1-1-1-2/2-2-2-3/2-2-2-1//, full of wear;

GB9 comb: 2-2-2-3/2-2-2-1/1-1-1-2//, full penetration;

part 2 attachment portion:

GB1 comb: 0-1-1/1-0-0-0//, 1 is 2 empty;

GB2 comb: 1-0-0/1-2-2/2-3-3/2-1-1//, full penetration;

GB3 comb: 2-3-3/2-1-1/1-0-0/1-2-2//, full penetration;

GB7 comb: 0-0-0-1/1-1-1-0//,1 is 2 empty;

GB8 comb: 1-1-1/1-1-1-2/2-2-2-3/2-2-2-1//, full of wear;

GB9 comb: 2-2-2-3/2-2-2-1/1-1-1-2//, full penetration;

part 3:

GB1 comb: 0-1-1/1-0-0-0//, 1 is 2 empty;

GB2 comb: 1-0-0/1-2-2/2-3-3/2-1-1//, full penetration;

GB3 comb: 2-3-3/2-1-1/1-0-0/1-2-2//, full penetration;

GB5 comb: 0-0-0/4-4-4//, 3 empty, 1 through, 3 empty;

GB6 comb: 0-0-0-0/4-4-4/0-0-0/4-4-4//, 6 empty, 1 pass;

GB7 comb: 0-0-0-1/1-1-1-0//,1 is 2 empty;

GB8 comb: 1-1-1/1-1-1-2/2-2-2-3/2-2-2-1//, full of wear;

GB9 comb: 2-2-2-3/2-2-2-1/1-1-1-2//, full penetration;

GB11 comb: 0-0-0/4-4-4//, 3 empty, 1 through, 3 empty;

GB12 comb: 0-0-0-0/4-4-4/0-0-0/4-4-4//, 6 empty, 1 pass;

part 4:

GB4：

2-3-3/1-0-0-0/2-3-3/1-0-0/0 3-3-3/1-0-0-0/2-3-3-3/1-0-0/2-3-3/1-0-0/0-2-3-3/1-0-0/2-3-3/1-0-0// 2-0-0/2-3-3/1-0-0-0/2-3-3/1-0-0// 1-3/0-0//, full wear;

GB10 comb:

2-2-3/1-1-1-0/2-2-2-3/1-1-1-0/2-2-3/1-1-0/2-2-2-3/1-1-1-0/2-2-2-3/1-1-0/2-2-2-3/1-1-1-0/2-2-2-3/1-1-1-0/2-2-3/1-1-0/2-2-2-3/1-1-1-0/2-2-2-3/1-1-1-1/2-3/1-1-1-0/, full wear;

the yarn composition adopted by the single comb structure is as follows:

part 1:

GB1 comb: 280D nylon/shape memory spandex core-spun yarn;

GB2 comb: 140D nylon DTY;

GB3 comb: 140D nylon DTY;

GB7 comb: 280D nylon/shape memory spandex core-spun yarn;

GB8 comb: 140D nylon DTY;

GB9 comb: 140D nylon DTY;

part 2:

GB1 comb: 280D nylon/shape memory spandex core-spun yarn;

GB2 comb: 140D nylon DTY;

GB3 comb: 140D nylon DTY;

GB7 comb: 280D nylon/shape memory spandex core-spun yarn;

GB8 comb: 140D nylon DTY;

GB9 comb: 140D nylon DTY;

part 3:

GB1 comb: 280D nylon/shape memory spandex core-spun yarn;

GB2 comb: 140D nylon DTY;

GB3 comb: 140D nylon DTY;

GB5 comb: 140D nylon DTY;

GB6 comb: 140D nylon DTY;

GB7 comb: 280D nylon/shape memory spandex core-spun yarn;

GB8 comb: 140D nylon DTY;

GB9 comb: 140D nylon DTY;

GB11 comb: 140D nylon DTY;

GB12 comb: 140D nylon DTY;

part 4:

GB4 comb: 70D nylon DTY;

GB10 comb: 70D nylon DTY;

(4) And (3) post-finishing:

(2) cooling;

(5) And (5) detecting and packaging.

The medical arm protective sleeve with the integrally formed cylindrical open-pore-free structure is prepared in the comparative example 2, although the medical arm protective sleeve can be used for fixing a medical dressing, the 4 th part adopts a flattened tissue, so that an open-pore part cannot be formed, the medical arm protective sleeve is inconvenient to fix an arm vein indwelling needle, and the medical arm protective sleeve can only play a role in fixing a few simple auxiliary materials and cannot be used for fixing the vein indwelling needle at all because of the open-pore structure; and the cutting can be off-line, so that the production process flow is increased.

While the invention has been described with reference to the preferred embodiments, it is not limited thereto, and various changes and modifications can be made therein by those skilled in the art without departing from the spirit and scope of the invention as defined in the appended claims.

Claims

1. The process for producing the shape memory warp knitting forming medical arm protective sleeve is characterized by weaving an integrated fabric with a warp knitting mesh structure by using a 12-bar double needle bar warp knitting machine, wherein the shape memory warp knitting forming medical arm protective sleeve is divided into 4 parts, and comprises a 1 st part substrate part, a 2 nd part connecting part, a 3 rd part opening part and a 4 th part opening edge connecting part; the open edge connecting part connects the open parts, the open parts are arranged in the middle of the base material part, and the connecting part connects the base material part into a cylinder; the base material part is knitted by 6 bars, the bars GB1 and GB7 are threaded through nylon/shape memory spandex core-spun yarns, knitting chain tissues are adopted to respectively fill yarns on a front needle bed and a back needle bed, the bars GB2 and GB3 are fully threaded through the mattress yarns on the front needle, a warp knitting mesh structure is formed, and the bars GB8 and GB9 are filled with yarns on the back needle bed, so as to form a mesh structure; the structure of the connecting part and the base material part is the same, and the threading modes are different; the open hole part is formed by knitting 10 bars, the bars GB1 and GB7 are respectively arranged on the front needle mattress yarn, the bars GB5 are respectively arranged on the open hole part by using open knitting chain structure, the bars GB5 are respectively arranged on the front needle mattress yarn, the bars GB5 are arranged on the front needle mattress yarn in a different way from the bars GB1, the bars GB8 are arranged on the front needle mattress yarn by using a variable knitting chain structure, the bars GB7 are identical to the bars GB1 in a structure, the bars GB8 are identical to the bars GB2 in a structure, the bars GB9 are respectively arranged on the back needle mattress structure, the bars GB3 are respectively arranged on the back needle mattress structure, the bars GB5 are also arranged on the front needle mattress yarn in a different way, the bars GB6 are respectively arranged on the back needle mattress structure, the bars GB7 are identical to the bars GB1 in a structure, the bars GB8 are identical to the structure of the mattress structure, the bars GB9 are respectively arranged on the back needle mattress structure, and the bars GB3 are respectively arranged on the back needle mattress structure, and the back needle mattress structure is identical to the back needle mattress structure is formed on the back needle mattress structure; the open hole edge connecting part is formed by knitting 2 guide bars, the guide bar GB4 is formed by knitting warp knitting and opening knitting chains on the front needle mattress yarn, the guide bar GB10 is formed by knitting the same knitting structure on the back needle bed yarn, and the open hole parts are connected.

2. The process according to claim 1, characterized in that it comprises the following steps:

(4) And (3) post-finishing: (1) shaping; (2) cooling;

(5) Detecting and packaging;

part 1 substrate portion:

guide bar GB1: 0-1-1/1-0-0-0//, 1 is 7 blank;

guide bar GB2: 1-0-0/1-2-2/2-3-3/2-1-1//, full penetration;

guide bar GB3: 2-3-3/2-1-1/1-0-0/1-2-2//, full penetration;

guide bar GB7:0-0-0-1/1-1-1-0//,1 is 7 blank;

guide bar GB8: 1-1-1/1-1-1-2/2-2-2-3/2-2-2-1//, full of wear;

guide bar GB9: 2-2-2-3/2-2-2-1/1-1-1-2//, full penetration;

part 2 attachment portion:

guide bar GB1: 0-1-1/1-0-0-0//, 1 is 2 empty;

guide bar GB2: 1-0-0/1-2-2/2-3-3/2-1-1//, full penetration;

guide bar GB3: 2-3-3/2-1-1/1-0-0/1-2-2//, full penetration;

guide bar GB7:0-0-0-1/1-1-1-0//,1 is 2 empty;

guide bar GB8: 1-1-1/1-1-1-2/2-2-2-3/2-2-2-1//, full of wear;

guide bar GB9: 2-2-2-3/2-2-2-1/1-1-1-2//, full penetration;

part 3 aperture portion:

guide bar GB1: 0-1-1/1-0-0-0//, 1 is 2 empty;

guide bar GB2: 1-0-0/1-2-2/2-3-3/2-1-1//, full penetration;

guide bar GB3: 2-3-3/2-1-1/1-0-0/1-2-2//, full penetration;

guide bar GB5: 0-0-0/4-4-4//, 3 empty, 1 through, 3 empty;

guide bar GB6: 0-0-0-0/4-4-4/0-0-0/4-4-4//, 6 empty, 1 pass;

guide bar GB7:0-0-0-1/1-1-1-0//,1 is 2 empty;

guide bar GB8: 1-1-1/1-1-1-2/2-2-2-3/2-2-2-1//, full of wear;

guide bar GB9: 2-2-2-3/2-2-2-1/1-1-1-2//, full penetration;

guide bar GB11: 0-0-0/4-4-4//, 3 empty, 1 through, 3 empty;

guide bar GB12: 0-0-0-0/4-4-4/0-0-0/4-4-4//, 6 empty, 1 pass;

part 4 aperture edge connection:

guide bar GB4:

guide bar GB10:

3. The process according to claim 2, wherein the single comb structure used in the process for producing the shape memory warp knit shaped medical arm protective sleeve comprises the following yarn components:

guide bar GB1: 210-560D nylon/shape memory spandex core-spun yarn;

guide bar GB2: 70-140D nylon yarns;

guide bar GB3: 70-140D nylon yarns;

guide bar GB4: 40-70D nylon yarn;

guide bar GB5: 70-140D nylon yarns;

guide bar GB6: 70-140D nylon yarns;

guide bar GB7: 210-560D nylon/shape memory spandex core-spun yarn;

guide bar GB8: 70-140D nylon yarns;

guide bar GB9: 70-140D nylon yarns;

guide bar GB10: 40-70D nylon yarn;

guide bar GB11: 70-140D nylon yarns;

guide bar GB12: 70-140D nylon yarn.

4. The process according to claim 2, wherein the process for covering the nylon/shape memory spandex core-spun yarn comprises the steps of: taking shape memory spandex as a core and nylon as an outer covering yarn, spinning by adopting a draft ratio of 3.0-4.0 and a twist of 200-1000 twists/m to obtain the nylon/shape memory spandex covering yarn.

5. The process of claim 4, wherein the nylon in the nylon/shape memory spandex core-spun yarn is semi-gloss nylon, having a gauge of 70D/48F.

6. The process according to claim 2, wherein the square meter grammage of the shape memory warp knit shaped medical arm protective sleeve is 200-430 g/m ² 。

7. A shape memory warp knit shaped medical arm protective sleeve made by the process of any one of claims 1-6.

8. The use of the shape memory warp knit shaped medical arm protection sleeve of claim 7 in the field of medical supplies.

9. A method of securing a wound dressing, wherein the method employs the shape memory warp knit shaped medical arm cover of claim 7.

10. A method of securing a venous indwelling needle, said method employing the shape memory warp knit shaped medical arm protective sheath of claim 7.