CN105017796A - Medical nonwoven fabric and manufacturing method thereof - Google Patents

Abstract

The invention relates to a medical nonwoven fabric including the components: 85-90 parts of a thermoplastic elastomer, 6-12 parts of low-density polyethylene, and 3-6 parts of masterbatch granules. A manufacturing method of the medical nonwoven fabric includes the steps: raw material mixing, thermoplastic extrusion, film blowing, wind ring cooling, and thin film reeling. The medical nonwoven fabric has the beneficial effects that with utilization of compatibility of the raw materials, mixed proportioning is performed, the film is prepared by a blow molding method, and the defects of an original disposable medical nonwoven fabric are solved; the raw materials are convenient to purchase, huge and complex mechanical devices are simplified, the energy consumption is greatly reduced, fixed assets and field possession are lessened, the process technology is simpler, the operating difficulty is reduced, the protective property, strength, disinfection stability, comfort, permeability, pilling resistance and other properties of the medical nonwoven fabric are improved, and the requirements of technical indicators of the medical nonwoven fabric are fully met.

Description

A kind of medical non-woven cloth and manufacture method thereof

Technical field

The present invention relates to a kind of medical non-woven cloth and manufacture method thereof.

Background technology

Along with the development of national economy and the continuous improvement of people's lives, improve level of medical and health and prevent the cross infection of bacterium that oneself becomes the key subjects of pendulum in face of medical department, use satisfactory medical non-woven cloth goods to be effective measures.

Non-woven easily carry out Composite and functionalized design easy to use, safe and reliable and be easily combined therefore with modern medicine and medicine, obtain at medical field and apply more and more widely.In biomedical sector widely used non-woven have that fiber source is wide, with short production cycle, technique flexibly, diverse in function and the feature such as product cost is low.

The medical non-woven cloth developed recently of China rapidly its tempo is started late to the research of medical non-woven cloth considerably beyond world average level but due to China, can only produce some common conventional medical non-woven cloth products at present, new high-tech product also depends on import.Therefore the medical non-woven cloth of China or one have the frontier needing exploitation further of very large potentiality.

The prerequisite function of existing medical non-woven cloth has protective, intensity, sterilization stability, ventilation property and wearing comfort.

(1) protective.Protective is divided into part to prevent or all prevent the infringement of particulate, bacterium, liquid and virus.Find after carefully studying medical non-woven cloth articles for use, the barrier propterty of the surgery apparel used now is not by far up to the mark.The initial object of design protection operation dress is that protection patient is not subject to environmental infection, and this is a very important function.

(2) intensity.The end-use of curable product determines the requirement to non-woven intensity.

(3) sterilization stability.When designing the non-woven articles for use needing sterilization, the impact that sterilisation step causes non-woven performance must be understood.

(4) comfortableness and ventilation property.It has been generally acknowledged that comfortable/ventilation property and protective are conflicts, non-woven articles for use planner must adopt half measure to solve this contradiction.For infantees of sterilizing, sterilization infantees should have protective, in storage and transportation, intercept dust and microbe infiltration enters in sterilization wraps up, enough micropores must be had again to penetrate in sterile package by sterilizing agent, surgical set in thorough disinfection bag, and at the end of sterilization, sterilizing agent all must be eliminated in bag, does not allow moisture or chemical residue in bag.Any accident surgery caused by medical non-woven cloth articles for use, all will affect its application at medical field.Protective clothing has ventilation property, will feel comfortable when wearing.Another performance of comfortableness is feel, and this aesthetic properties is difficult to numeral explanation.In general, it is very necessary for obtaining the feedback opinion of market to non-woven flexibility, comfortableness, drape.

(5) pilling tendency.The research that can prevent the observable fluffy balls of naked eyes from entering the product of air in sterile package Kaifeng or use procedure causes people to pay close attention to greatly.Cotton towel and gauze industry are discussing critical micelle dimensional problem always, do not give a definition so far, it has been generally acknowledged that the non-woven fluffy balls amount of coming off be made up of continuous filament yarn is minimum.Also all immature for the test method measuring the fluffy balls amount of coming off at present.

Thermoplastic elastomer (TPR) is a kind of snappiness with rubber, high strength, high resilience, have again can blowing processing feature, there is environment-protecting asepsis safety, there is excellent tint permanence, soft-touch, weathering resistance, fatigue resistance and temperature tolerance, processing characteristics is superior, need not sulfuration, can recycle and reduce costs, with body material coating and bondings such as PP plastic material, PE plastic material, PC engineering plastics, PS plastics, ABS plastic raw materials, also can be shaping separately.Thermoplastic elastomer had both had the processing characteristics of thermoplastics, had again the physicals of vulcanized rubber, was the advantageous combination of plastics and rubber advantage.

Low Density Polyethylene (LDPE) is generally produced by high pressure polymerisation, and density is 0.910 ~ 0.925g/cm ³.The molecular structure of Low Density Polyethylene has the linear macromolecule compared with higly branched chain, and side chain different in size on its main chain have impact on the regularity of macromolecular alignment, piles up not tight, hinder poly crystallization, therefore degree of crystallinity Gongwei 55% ~ 65%.The fusing point of Low Density Polyethylene is low, and quality is soft, and long-chain branch gives high fondant-strength when its low-viscosity in the course of processing under high shear rate and drawing-off,

Therefore be very suitable for film-blowing process, be mainly used in the production of plastic sheeting for farm use, multilayer packing membrane etc.

The object of the invention is to provide a kind of novel medical non-woven cloth, not only technology is simple for it, and processing ease, equipment simplifies, and the manufacturing processed applying and be processed into curable product is simple and convenient.

Summary of the invention

The technical problem to be solved in the present invention is: based on the problems referred to above, the invention provides a kind of medical non-woven cloth and manufacture method thereof.

The present invention solves the technical scheme that its technical problem adopts: a kind of medical non-woven cloth, comprises following component: thermoplastic elastomer 85 ~ 90 parts, Low Density Polyethylene 6 ~ 12 parts, look female particle 3 ~ 6 parts.

The manufacture method of medical non-woven cloth, comprises the following steps:

(1) raw material mixing: by the proportioning of thermoplastic elastomer 85 ~ 90 parts, Low Density Polyethylene 6 ~ 12 parts, look female particle 3 ~ 6 parts, raw material is added blender and fully mix;

(2) thermoplastic is extruded: mixed raw material is extruded from cross-head through melting, and each spot temperature of forcing machine is pressed: the order of die orifice, die head, threeway, barrel 3, barrel 2, barrel 1 is set as 105 DEG C, 125 DEG C, 135 DEG C, 140 DEG C, 125 DEG C, 95 DEG C respectively;

(3) blown film: adopt inflation film manufacturing machine blow molding to produce the film of needs;

(4) vane cooling: the film after blown film cools through the adjustable vane of external-cooling type;

(5) the batching of film: the film of cooling is batched through steady rest, collapser, take off roll, adjusts the width of film, thickness on request, finished films is rolled into cylinder.

The invention has the beneficial effects as follows: utilize the blending of raw material to carry out mixing match, adopt the method for blowing to make film, solve the deficiency that original Dispoable medical non-woven exists; The purchasing of raw materials is convenient, simplify huge, complicated mechanical means, greatly reduce energy consumption, and reduce occupying of fixed capital and place, Technology is more simple, reduce operation easier, improve the protective of medical non-woven cloth, intensity, sterilization stability, comfortableness and the performance such as ventilation property, pilling tendency, meet the technical requirement of medical non-woven cloth completely.

Embodiment

The invention will be further described in conjunction with specific embodiments now, and following examples are intended to the present invention instead of limitation of the invention further are described.

The processing units of the manufacture method employing of medical non-woven cloth:

Blender, blow-extruder, tractor, collecting machine.

Technical process: raw material mixes------inflation---cooling---traction---rolling that thermoplastic is extruded.

Set before production each spot temperature of forcing machine by: the order of die orifice, die head, threeway, barrel 3, barrel 2, barrel 1 is set as 105 DEG C, 125 DEG C, 135 DEG C, 140 DEG C, 125 DEG C, 95 DEG C.

By TPR, LDPE, look female particle, add blender by the proportioning of 86.5%+9%+4.5% fully to mix, forcing machine hopper is added again after mixing, the weight of particle dependence itself enters screw rod from hopper, after particle contacts with screw thread slant edge, the slant edge rotated is in the face of plastics and produce a thrust perpendicular with slant edge face, by plastic pellet forward, in passing process, due to plastics and screw rod, friction between plastics and machine barrel and intergranular collision friction, also progressively dissolve due to barrel indirect heating simultaneously, the plastic warp head of melting filters decon from die head die orifice out, through inflation, vane cools, through steady bubble frame collapser, take off roll batch, adjust the width of film on request, thickness, finished films is rolled into cylinder.

Because the present invention utilizes the blending of raw material to carry out mixing match, the method of blowing is adopted to make film, the feature of environmental protection site requirements that is strong, device-specific solving the raw material production that original Dispoable medical non-woven exists is comparatively large, finished product work program is complicated, finished product rear protecting, intensity, sterilization stability, comfortableness and the weak point such as ventilation property, pilling tendency.The purchasing of raw materials of the present invention is convenient, simplify huge, complicated mechanical means, greatly reduce energy consumption, and reduce occupying of fixed capital and place, Technology is more simple, reduce operation easier, improve the protective of medical non-woven cloth, intensity, sterilization stability, comfortableness and the performance such as ventilation property, pilling tendency, meet the technical requirement of medical non-woven cloth completely.

Obtained TPR-PE medical non-woven cloth associated technical parameters:

Molding mode: blow molding;

Product thickness: 0.06 ~ 0.20mm; Folding footpath: 120 ~ 750mm; Hardness: shore 60A;

Material illustrates: SEBS blow molding;

Longitudinal stretching force: 35 newton;

Lateral tensile force: 20 newton;

Thickness color is produced by customer requirement, conventional color: translucent, blue, grey.

The TPR-PE film that the present invention manufactures, tensile property, damping, ventilation property are all more excellent, can be used as high-grade medical grade plastic film, possess the physical propertys such as excellent weather-proof, ventilative, pliable and tough, on-slip, texture and performance-based are better than non-woven fabrics.

The scope of application: high-grade medical grade TPR-PE film medical film can be used for body cover (can be combined with non-woven fabrics), disposable medical gloves, surgical operation towel, sleeve, the surgical bandages of operation patients.Products characteristics: environmental protection, shading, ventilative, be not clamminess; Softness, waterproof, rub resistance, phozy, be rich in grade without electrostatic, outward appearance, there is good pro-skin sense.

Blue membrane physicals: permeability: can make skin general breathing, keeps the healing environment of wound the best.Water proof, fungus proof performance: anti-sealing and bacterium and dirt invade wound, and the most effectively suppress to vacillate in various germ art, low sensitization viscosity is moderate, fixing reliable not skin irritation, does not hinder skin when removing.

With above-mentioned according to desirable embodiment of the present invention for enlightenment, by above-mentioned description, relevant staff in the scope not departing from this invention technological thought, can carry out various change and amendment completely.The technical scope of this invention is not limited to the content on specification sheets, must determine its technical scope according to right.

Claims (2)

1. a medical non-woven cloth, is characterized in that: comprise following component: thermoplastic elastomer 85 ~ 90 parts, Low Density Polyethylene 6 ~ 12 parts, look female particle 3 ~ 6 parts.

2. the manufacture method of medical non-woven cloth according to claim 1, is characterized in that: comprise the following steps:

(1) raw material mixing: by the proportioning of thermoplastic elastomer 85 ~ 90 parts, Low Density Polyethylene 6 ~ 12 parts, look female particle 3 ~ 6 parts, raw material is added blender and fully mix;

(2) thermoplastic is extruded: mixed raw material is extruded from cross-head through melting, and each spot temperature of forcing machine is pressed: the order of die orifice, die head, threeway, barrel 3, barrel 2, barrel 1 is set as 105 DEG C, 125 DEG C, 135 DEG C, 140 DEG C, 125 DEG C, 95 DEG C respectively;

(3) blown film: adopt inflation film manufacturing machine blow molding to produce the film of needs;

(4) vane cooling: the film after blown film cools through the adjustable vane of external-cooling type;

(5) the batching of film: the film of cooling is batched through steady rest, collapser, take off roll, adjusts the width of film, thickness on request, finished films is rolled into cylinder.