CN110696460A

CN110696460A - Preparation method of surgical drape cloth base material

Info

Publication number: CN110696460A
Application number: CN201911055099.4A
Authority: CN
Inventors: 不公告发明人
Original assignee: Individual
Current assignee: Individual
Priority date: 2017-03-20
Filing date: 2017-03-20
Publication date: 2020-01-17
Also published as: CN106965514B; CN106965514A; CN107599574B; CN107599574A

Abstract

The invention provides a preparation method of an operation hole towel cloth base material, the operation hole towel cloth base material comprises a non-woven fabric layer and a film layer, the non-woven fabric layer and the film layer are bonded and compounded through an adhesive layer, the film layer is a polyethylene film, and the polyethylene film comprises the following components in percentage by weight: 704230% -40% of PE particles; 705015% -25% of PE particles; PE particles P0130% -45%; 4% -13% of color additive; 1 to 4 percent of modified additive; 3 to 10 percent of mildew-proof antibacterial additive; the preparation method of the surgical hole towel cloth base material comprises the following steps: A) raw material purchasing; B) checking and accepting for storage; C) taking the mixed materials; D) producing a film; E) performing compound mass production; F) slitting and winding; G) checking and accepting and packaging; H) warehousing and delivering; the base material of the surgical hole towel cloth prepared by the invention has antibacterial and mildewproof performances, can better protect patients, can be used outdoors in emergency, prevents secondary damage caused by bacteria penetration, and has elasticity and good fitting property when in use.

Description

Preparation method of surgical drape cloth base material

Technical Field

The invention belongs to the technical field of medical composite materials, and relates to an operation hole towel cloth base material and a preparation method thereof.

Background

With the continuous improvement of medical level, hospitals increasingly pay more attention to the prevention and control of infection risks in operations, and the operation hole towel is widely used in operating rooms. Surgical drapes are barrier materials used to drape over the surgical site to prevent and reduce contamination during surgery, to protect patients with compromised resistance from cross-contamination, and to protect surgical personnel. The conventional medical operation hole towel generally uses SMS non-woven fabric or spunlace non-woven fabric which is processed by three prevention as a main base material, and is compounded with a film by using a compounding technology to play the roles of absorbing blood and blocking liquid leakage.

However, the conventional surgical hole towel material has poor elasticity, so that the formed surgical hole towel has poor fit, is bulky and is easy to hook threads and block the operation of doctors. In addition, the mildew-proof and antibacterial properties of the material are weak, and the mildew can cause secondary damage to wounds in outdoor use.

The film compounded with the non-woven fabric is mostly formed by adopting a casting film machine, the casting film machine is used for casting and quenching a melt to form a film through a casting device, and a cooling roller is the most main film forming part. Most of the traditional cooling rollers adopt a single-row spiral cooling water channel, and when the cooling rollers are cooled to form a film, cooling water flows from one end of each cooling roller to the other end of each cooling roller so as to maintain the lower roller surface temperature of the cooling rollers. The cooling roller can only produce narrow casting films because the length of the cooling roller of the narrow casting films is short, the temperature difference between two ends of the roller surface is not large, and the quality of the casting films formed by quenching the casting films cannot be influenced. For the wide casting film, a cooling roller with longer length is needed, and the temperature difference between two ends of the roller surface is increased along with the lengthening of the length, so that the quality of the casting film formed by quenching is influenced, and the prepared composite material cannot meet the quality requirement of the surgical hole towel.

Disclosure of Invention

The invention aims to solve the problems in the prior art, provides a surgical hole towel cloth base material, solves the problem of poor antibacterial and mildewproof performance, can better protect patients, can be used outdoors in emergency, and prevents secondary damage caused by bacteria penetration.

The purpose of the invention can be realized by the following technical scheme:

the surgical hole towel cloth base material comprises a non-woven fabric layer and a film layer, wherein the non-woven fabric layer and the film layer are bonded and compounded through an adhesive layer, the film layer is a polyethylene film, and the polyethylene film comprises the following components in percentage by weight:

in the base material of the surgical hole towel cloth, the color additive comprises 3-10% of color additive B05 and 1-3% of color additive W01.

In the surgical hole towel cloth base material, the gram weight of the non-woven fabric layer is 2-3 times of that of the film layer.

In the surgical hole towel cloth base material, the gram weight of the non-woven cloth layer is 40-50 gsm, the gram weight of the thin film layer is 15-25 gsm, and the gram weight of the adhesive layer is 2-5 gsm.

In the above-mentioned base material of the surgical drape, the adhesive layer is TEP903 series adhesive.

In the above-mentioned surgical drape cloth base material, the nonwoven fabric layer is a spunlace nonwoven fabric or an SMS nonwoven fabric.

The invention also aims to solve the problems of poor antibacterial and mildewproof performance and poor fitting performance in the prior art, and the prepared surgical drape cloth base material has antibacterial and mildewproof performance and good fitting performance when having elasticity.

The purpose of the invention can be realized by the following technical scheme:

a preparation method of a surgical hole towel cloth base material comprises the following steps:

A) raw material purchasing: purchasing raw materials such as non-woven fabrics, PE particles 7042, PE particles 7050, PE particles P01, color additives B05, W01, modified additives SHJ, mildew-proof antibacterial additives MKJ1, TEP903 series glue and the like;

B) and (6) checking and accepting and warehousing: checking and warehousing the raw materials purchased in the step A);

C) taking and stirring materials: weighing various raw materials according to a proportion by using a high-precision electronic scale according to 500 kg in each barrel, wherein the proportion of the PE particles 7042 is 30-40%, and the proportion of the PE particles 7050 is 15-25%; the proportion of the PE particles P01 is 30-45%; the color additive B05 accounts for 3-10 percent; the color additive number W01 accounts for 1-3%; the proportion of the modified additive is 1 to 4 percent; the ratio of the mildew-proof antibacterial additive is 3-10 percent; adding the raw materials into a vertical heating stirrer for stirring, wherein the stirring time is more than 50 minutes per 500 kg, the temperature is controlled to be 50 +/-5 ℃, and only 500 kg plus or minus 10 kg of raw materials can be stirred at one time;

D) film production: adding the stirred materials into a double-screw widening type casting machine, mixing and extruding to obtain a polyethylene film; the heating of a material cylinder of the film forming equipment is provided with 7 areas, the temperature of the first area is 185 +/-10 ℃, the temperature of the second area is 220 +/-10 ℃, the temperature of the third area is 235 +/-10 ℃, and the temperatures of the fourth area to the seventh area are 250 +/-10 ℃; the temperature of the filter screen changer is 240 +/-10 ℃, and the temperature of the rest parts is adjusted between 230 ℃ and 250 ℃; the temperature control of the film forming mold is provided with 13 areas, the temperature of the two areas is set to be 260 +/-5 ℃, and the temperature of the other 11 areas is set to be 240 +/-10 ℃;

E) compound mass production: bonding and compounding the non-woven fabric and the polyethylene film prepared in the step D) by using a compounding machine to prepare a finished product, wherein the tension technological parameters of the compounding machine are that the unreeling tension is 0.5-1 Newton, the reeling tension is 1-4 Newton, and the tension adjustment of 0.1 Newton is carried out; the temperature technological parameters are that the temperature of a melting cylinder is 150 +/-2 ℃, the temperature of a throat pipe is 160 +/-2 ℃, the temperature of a spray gun is 160 +/-2 ℃, and the temperature of hot air is 160 +/-2 ℃; the other control parameters are that the clearance of a roller of the spray gun is 50mm, the active unreeling tension is 0.5 to 1N, and the reeling tension is 1 to 4N;

F) slitting and winding;

G) checking and accepting and packaging;

H) and (7) warehousing and ex-warehouse.

In the preparation method of the surgical hole towel cloth base material, the double-screw widening type casting machine is provided with a widening type cooling roller, the widening type cooling roller comprises a roller body, a first rotary joint and a second rotary joint, the first rotary joint is installed at the left end of the roller body, the second rotary joint is installed at the right end of the roller body, the first rotary joint is provided with a first liquid inlet flow passage and a first liquid outlet flow passage, the first liquid inlet flow passage is connected with the first liquid inlet pipe, the first liquid outlet flow passage is connected with the first liquid outlet pipe, the second rotary joint is provided with a second liquid inlet flow passage and a second liquid outlet flow passage, the second liquid inlet flow passage is connected with the second liquid inlet pipe; the roller body comprises an inner roller body, a middle roller body, an outer roller body, a left end cover and a right end cover, the middle roller body is sleeved on the inner roller body, the outer roller body is sleeved on the middle roller body, the left end of the inner roller body penetrates through the left end cover, the left end cover is covered on the left end of the middle roller body and the left end of the outer roller body in a sealing mode, a first rotary joint is connected with the left end cover, and the first rotary joint is sleeved and covered on the left end of the inner roller body; the right end of the inner roller body penetrates through the right end cover, the right end cover covers the right end of the middle roller body and the right end of the outer roller body, the second rotary joint is connected with the right end cover, and the second rotary joint is sleeved and sealed at the right end of the inner roller body; the middle roller body is convexly provided with a check ring, the check ring is integrally formed at the middle end of the outer wall of the middle roller body, and the check ring is pressed against the middle end of the inner wall of the outer roller body; a first cooling channel and a second cooling channel are formed between the outer roller body and the middle roller body, end cover flow passages are formed in the left end cover and the right end cover, the end cover flow passage of the left end cover is communicated with the first cooling channel and the first liquid outlet flow passage, and the end cover flow passage of the right end cover is communicated with the second cooling channel and the second liquid outlet flow passage; the inner roller body is divided into a left roller body and a right roller body which are integrally formed and are in a symmetrical structure; the liquid inlet channel I of the first rotary joint is communicated with the liquid inlet channel I of the left roller body; a liquid inlet channel II of the rotary joint II is communicated with a liquid inlet channel II of the right roller body; a first spiral water channel and a second spiral water channel are formed between the left side roller body and the middle roller body, the first spiral water channel and the second spiral water channel are staggered with each other, a first liquid inlet channel extends inwards from the left end of the left side roller body and is communicated with the inner end of the first spiral water channel, the outer end of the first spiral water channel is communicated with the outer end of the second spiral water channel through a first connecting groove, the middle roller body is provided with a first circle of water outlet holes, the first water outlet holes are adjacent to the check ring, and the inner end of the second spiral water channel is communicated with; a spiral water channel III and a spiral water channel IV are formed between the right side roller body and the middle roller body, the spiral water channel III and the spiral water channel IV are staggered with each other, a liquid inlet channel II extends inwards from the right end of the right side roller body and is communicated with the inner end of the spiral water channel III, the outer end of the spiral water channel III is communicated with the outer end of the spiral water channel IV through a connecting groove II, the middle roller body is provided with a circle of water outlet hole II, the water outlet hole II is adjacent to the retainer ring, and the inner end of the spiral water channel IV is communicated; the retaining ring both sides welding of middle roll body has the equidistant spaced drainage piece group of multiunit, and every drainage piece group comprises a plurality of drainage pieces, and the drainage piece of every drainage piece group is radial interval welding on the outer wall of middle roll body, and the position of the drainage piece of adjacent two sets of drainage piece groups staggers each other.

In the preparation method of the operation hole towel cloth base material, the two ends of the outer roller body are respectively embedded with a thickening sleeve, the thickening sleeve is positioned between the end part of the outer roller body and the end part of the middle roller body, the outer wall of the thickening sleeve is abutted against the inner wall of the outer roller body, and the wall thickness of the thickening sleeve is gradually increased from inside to outside.

In the preparation method of the surgical hole towel cloth base material, the inner wall of the outer roller body is adhered with the first heat-conducting metal layer, and the inner wall of the middle roller body is adhered with the second heat-conducting metal layer.

Compared with the prior art, the invention has the advantages that:

1. the product of the invention has the mildew-proof and antibacterial properties, can better protect patients in use, can also be used outdoors in emergency, prevents bacteria from penetrating, keeps better effect of the product, prevents secondary damage of wounds, has good elasticity, and can be tightly fitted with certain tension when the part of the patient is fastened;

2. the design of the widening type cooling roller of the casting machine is a symmetrical two-way liquid inlet and drainage structure, the adopted two-way cooling water inlet and cooling water outlet structures are arranged at two ends of the roller body in two ways, the liquid inlet end and the liquid outlet end of the cooling water are the same end of the roller body, the liquid inlet and the liquid outlet structures are simultaneously arranged at the same end of the roller body, the temperature difference at two ends of the roller body is reduced, the uniform cooling of a film is realized, the problem that the cooling efficiency is low when the length of the cooling roller is too long is solved, the cooling is not uniform is solved, the production quality of the film is improved, and the wide film.

Drawings

Fig. 1 is a schematic structural view of the surgical drape cloth base of the present invention.

FIG. 2 is a flow chart of a method of making a surgical drape cloth substrate of the present invention.

Fig. 3 is a schematic view of the structure of the widened chill roll of the present invention.

Fig. 4 is a side view of the intermediate roll body of the inventive widened chill roll.

Fig. 5 is a partially enlarged view of a portion a in fig. 3.

Fig. 6 is a partially enlarged view of a portion B in fig. 3.

In the figure, 1, a first rotary joint; 2. a second rotary joint; 3. a first liquid inlet flow channel; 4. a first liquid outlet flow passage; 5. a liquid inlet pipe I; 6. a first liquid outlet pipe; 7. a liquid inlet flow channel II; 8. a liquid outlet flow passage II; 9. a liquid inlet pipe II; 10. a second liquid outlet pipe; 11. an inner roller body; 12. a middle roller body; 13. an outer roller body; 14. a left end cap; 15. a right end cap; 16. a retainer ring; 17. a first cooling channel; 18. a second cooling channel; 19. an end cap flow passage; 20. a left roller body; 21. A right roller body; 22. a liquid inlet channel I; 23. a liquid inlet channel II; 24. a first spiral water channel; 25. a second spiral water channel; 26. connecting a first connecting groove; 27. a water outlet hole I; 28. a spiral water channel III; 29. a spiral water channel IV; 30. connecting groove two; 31. a water outlet hole II; 32. a drainage sheet set; 33. a drainage sheet; 34. thickening the sleeve; 35. a first heat-conducting metal layer; 36. a second heat-conducting metal layer; 37. an end cover groove; 38. a step portion; 39. a first drainage strip; 40. a second drainage strip; 41. a third drainage strip; 42. a fourth drainage strip; 43. a non-woven fabric layer; 44. a thin film layer; 45. and (6) an adhesive layer.

Detailed Description

The following are specific embodiments of the present invention and are further described with reference to the drawings, but the present invention is not limited to these embodiments.

Example one

As shown in figure 1, the invention provides an operation hole towel cloth substrate, which comprises a non-woven fabric layer 43 and a film layer 44, wherein the non-woven fabric layer 43 and the film layer 44 are bonded and compounded through an adhesive layer 45, the non-woven fabric layer 43 is 45gsm white spunlace non-woven fabric, the adhesive layer 45 is 4gsm TEP903 system glue, the film layer 44 is a 25gsm polyethylene film, and the polyethylene film comprises the following components in percentage by weight:

example two

The surgical hole towel cloth base material comprises a non-woven fabric layer 43 and a film layer 44, wherein the non-woven fabric layer 43 and the film layer 44 are bonded and compounded through an adhesive layer 45, the non-woven fabric layer 43 is 50gsm white spunlace non-woven fabric, the adhesive layer 45 is 3.0gsm TEP903 series glue, the film layer 44 is a 20gsm polyethylene film, and the polyethylene film comprises the following components in percentage by weight:

EXAMPLE III

The surgical hole towel cloth base material comprises a non-woven fabric layer 43 and a film layer 44, wherein the non-woven fabric layer 43 and the film layer 44 are bonded and compounded through an adhesive layer 45, the non-woven fabric layer 43 is 50gsm blue SMS non-woven fabric, the adhesive layer 45 is 3gsm TEP903 system glue, the film layer 44 is a 20gsm polyethylene film, and the polyethylene film comprises the following components in percentage by weight:

the main physical parameters of the operation hole towel cloth base material are width, gram weight, tensile strength, peeling strength and water pressure resistance. The equipment used for the gram weight test is a specific gravity balance of Taiwan high-speed railway company, the equipment used for the tensile strength and the peeling strength is a servo tensile testing machine of Taiwan high-speed railway company, the water pressure resistance test is a novel water pressure resistance tester imported from Switzerland, and the width of the door uses a conventional measuring tape.

The surgical drape cloth substrate provided in example three was tested and the results are shown in table one:

watch 1

The anti-mildew and antibacterial agent is added into the polyethylene film, so that the finished product has anti-mildew and antibacterial properties, the antibacterial effect is to better protect patients in use of the product, and can also be used for emergency outdoor use to prevent bacteria from penetrating, the anti-mildew effect is to keep the product to be better, and the mildew can cause secondary damage to wounds in outdoor use.

As shown in fig. 2 to 6, the invention further provides a preparation method of the surgical drape cloth base material, which is used for preparing the surgical drape cloth base material and comprises the following steps:

C) taking and stirring materials: weighing various raw materials according to a proportion by using a high-precision electronic scale according to 500 kg in each barrel, wherein the proportion of the PE particles 7042 is 30-40%, and the proportion of the PE particles 7050 is 15-25%; the proportion of the PE particles P01 is 30-45%; the color additive B05 accounts for 3-10 percent; the color additive number W01 accounts for 1-3%; the proportion of the modified additive is 1 to 4 percent; the ratio of the mildew-proof antibacterial additive is 3-10 percent; the raw materials with the component proportion of more than 20 percent are controlled within plus or minus 100 grams, and the raw materials with the component proportion of less than 20 percent are controlled within plus or minus 20 grams; adding the raw materials into a vertical heating stirrer for stirring, wherein the stirring time is more than 50 minutes per 500 kg, the temperature is controlled to be 50 +/-5 ℃, and only 500 kg plus or minus 10 kg of raw materials can be stirred at one time;

D) film production: adding the stirred materials into a double-screw widening type casting machine, mixing and extruding, and fully mixing and extruding the antibacterial and mildewproof additive and the common raw materials to prepare a polyethylene film with antibacterial and mildewproof performances; the heating of a material cylinder of the film forming equipment is provided with 7 areas, the temperature of the first area is 185 +/-10 ℃, the temperature of the second area is 220 +/-10 ℃, the temperature of the third area is 235 +/-10 ℃, and the temperatures of the fourth area to the seventh area are 250 +/-10 ℃; the temperature of the filter screen changer is 240 +/-10 ℃, and the temperature of the rest parts is adjusted between 230 ℃ and 250 ℃; the temperature control of the film forming mold is provided with 13 areas, the mold is rectangular, the side surface of the mold is trapezoidal, the temperature of the areas at two sides is set to be 260 +/-5 ℃, and the temperature of the other 11 areas is 240 +/-10 ℃;

F) slitting and winding;

G) checking and accepting and packaging;

H) and (7) warehousing and ex-warehouse.

The product needs to be finished by a casting machine and a compound machine together, and the problem between the two devices is tension control, so that the two devices have stable tension control systems, and the prepared product has good tensile property and elasticity, and can be tightly fitted with a certain tension when the part of a patient is fastened.

It is worth mentioning that, twin-screw widening formula casting machine has widening formula cooling roller, and widening formula cooling roller includes roll body, rotary joint 1 and rotary joint two 2, and rotary joint 1 installs the left end at the roll body, and rotary joint two 2 installs the right-hand member at the roll body, and when cooling down the film, the roll body is in the rotation state, and roll body relative rotation connects 1 and rotary joint two 2 axial rotations. The rotary joint I1 is provided with a liquid inlet flow channel I3 and a liquid outlet flow channel I4, the liquid inlet flow channel I3 is connected with a liquid inlet pipe I5, the liquid outlet flow channel I4 is connected with a liquid outlet pipe I6, the rotary joint II 2 is provided with a liquid inlet flow channel II 7 and a liquid outlet flow channel II 8, the liquid inlet flow channel II 7 is connected with a liquid inlet pipe II 9, and the liquid outlet flow channel II 8 is connected with a liquid outlet pipe II 10. This widen formula chill roll adopts and is two-way into the cooling water then two-way with the cooling water discharge from the both ends of roll body, and the feed liquor end of cooling water is the same end of roll body with play liquid end, and the feed liquor simultaneously and play liquid have reduced the roll body both ends difference in temperature at the same end of roll body, realize the even cooling of film, are favorable to improving the production quality of polyethylene film.

Specifically, the roller body comprises an inner roller body 11, a middle roller body 12, an outer roller body 13, a left end cover 14 and a right end cover 15, the middle roller body 12 is sleeved on the inner roller body 11, and the outer roller body 13 is sleeved on the middle roller body 12 and has a gap with the middle roller body 12.

The left end cover 14 and the right end cover 15 are identical in structure, shaft holes matched with the inner roller body 11 are formed in the center of the left end cover 14 and the center of the right end cover 15, the left end cover 14 is arranged at the left end of the inner roller body 11 in a penetrating mode, the left end cover 14 covers the left end of the middle roller body 12 and the left end of the outer roller body 13 in a sealing mode, and the left end cover 14 and the outer roller body 13 are fixed in a locking mode through screws. The first rotary joint 1 is connected with the left end cover 14 through a flange, and the left end of the inner roller body 11 is sleeved with the first rotary joint 1 and is covered by the left end of the inner roller body. The right end of the inner roller body 11 penetrates through the right end cover 15, the right end cover 15 is covered on the right end of the middle roller body 12 and the right end of the outer roller body 13 in a sealing mode, the right end cover 15 and the outer roller body 13 are locked and fixed through screws, the second rotary joint 2 is connected with the right end cover 15 in a flange mode, and the second rotary joint 2 is sleeved on the right end of the inner roller body 11 and covers the right end of the inner roller body 11. Optionally, both the left end cover 14 and the right end cover 15 are provided with an inwardly concave end cover groove 37, the left end of the middle roller body 12 is clamped into the end cover groove 37 of the left end cover 14, and the right end of the middle roller body 12 is clamped into the end cover groove 37 of the right end cover 15, so that the left end cover 14 and the right end cover 15 can more firmly seal the middle roller body 12.

Furthermore, the middle roller body 12 is convexly provided with a retaining ring 16, the retaining ring 16 is integrally formed at the middle end of the outer wall of the middle roller body 12, and the retaining ring 16 is pressed against the middle end of the inner wall of the outer roller body 13; optionally, the middle end of the inner wall of the outer roller body 13 is provided with an outer roller body 13 clamping groove matched with the size of the retainer ring 16, and the retainer ring 16 is clamped into the outer roller body 13 clamping groove to enhance the connecting force between the middle roller body 12 and the outer roller body 13. It is worth mentioning that due to the arrangement of the retainer ring 16, a first cooling channel 17 and a second cooling channel 18 are formed between the outer roller body 13 and the middle roller body 12, the first cooling channel 17 and the second cooling channel 18 are separated by the retainer ring 16, the first cooling channel 17 is formed on the left side of the retainer ring 16, and the second cooling channel 18 is formed on the right side of the retainer ring 16; the first cooling channel 17 and the second cooling channel 18 are not communicated, and the cooling effects are not interfered with each other. The left end cover 14 and the right end cover 15 are both provided with an end cover flow passage 19, the end cover flow passage 19 of the left end cover 14 is communicated with the first cooling channel 17 and the first liquid outlet flow passage 4, and the end cover flow passage 19 of the right end cover 15 is communicated with the second cooling channel 18 and the second liquid outlet flow passage 8, so that bidirectional independent cooling is realized. In addition, the first cooling channel 17 and the second cooling channel 18 are equal in volume to achieve an equivalent cooling effect.

The inner roller body 11 is divided into a left roller body 20 and a right roller body 21, the left roller body 20 and the right roller body 21 are integrally formed and have a symmetrical structure, the left roller body 20 corresponds to the first cooling channel 17, and the right roller body 21 corresponds to the second cooling channel 18. Specifically, the inside of the left roller body 20 is provided with a first liquid inlet channel 22, the inside of the right roller body 21 is provided with a second liquid inlet channel 23, and the first liquid inlet channel 22 is not communicated with the second liquid inlet channel 23. The inlet of the liquid inlet channel I22 extends into the liquid inlet flow channel I3 of the rotary joint I1, so that the liquid inlet flow channel I3 of the rotary joint I1 is communicated with the liquid inlet channel I22 of the left roller body 20; the inlet of the liquid inlet channel II 23 extends into the liquid inlet channel II 7 of the rotary joint II 2, so that the liquid inlet channel II 7 of the rotary joint II 2 is communicated with the liquid inlet channel II 23 of the right roller body 21; and the two ends of the inner roller body 11 are simultaneously fed with liquid, so that the two-way liquid feeding of the cooling roller is realized.

A spiral water channel I24 and a spiral water channel II 25 are formed between the left side roller body 20 and the middle roller body 12, the spiral water channel I24 and the spiral water channel II 25 are mutually staggered, a liquid inlet channel I22 extends inwards from the left end of the left side roller body 20 and is communicated with the inner end of the spiral water channel I24, the outer end of the spiral water channel I24 is communicated with the outer end of the spiral water channel II 25 through a connecting groove I26, the middle roller body 12 is provided with a circle of water outlet I27, the water outlet I27 is adjacent to the retainer ring 16, and the inner end of the spiral water channel II 25 is communicated with the cooling channel I17 through. A spiral water channel three 28 and a spiral water channel four 29 are formed between the right roller body 21 and the middle roller body 12, the spiral water channel three 28 and the spiral water channel four 29 are staggered, a liquid inlet channel two 23 extends inwards from the right end of the right roller body 21 and is communicated with the inner end of the spiral water channel three 28, the outer end of the spiral water channel three 28 is communicated with the outer end of the spiral water channel four 29 through a connecting groove two 30, the middle roller body 12 is provided with a circle of water outlet holes two 31, the water outlet holes two 31 are adjacent to the retainer ring 16, and the inner end of the spiral water channel four 29 is communicated with the cooling channel two 18 through.

After the first liquid inlet pipe 5 and the second liquid inlet pipe 9 are opened simultaneously, cooling water of the first liquid inlet pipe 5 enters the first liquid inlet channel 22 of the inner roller body 11 from the left end through the first liquid inlet flow channel 3 of the first rotary joint 1, flows inwards to the first spiral water channel 24 along the first liquid inlet channel 22, then flows through the surface of the left roller body 20 from inside to outside along the first spiral water channel 24, and after meeting with the second spiral water channel 25, the cooling water enters the second spiral water channel 25, and again flows over the surface of the left-hand roller body 20 from the outside inwards along the second spiral water channel 25, and enters the cooling channel I17 from the water outlet I27, flows leftwards from the middle of the outer roller body 13 along the cooling channel I17, passes through the end cover flow channel 19 of the left end cover 14 and the liquid outlet flow channel I4 of the rotary joint I1, is discharged outwards from the liquid outlet pipe I6, and is responsible for cooling the left half part of the outer roller body 13 and taking away heat of the left half part of the film.

The cooling water in the liquid inlet pipe II 9 enters the liquid inlet channel II 23 of the inner roller body 11 from the right end through the liquid inlet flow channel II 7 of the rotary joint II 2, flows inwards to the spiral water channel III 28 along the liquid inlet channel II 23, flows through the surface of the right roller body 21 from the inside to the outside along the spiral water channel III 28, is converged with the spiral water channel IV 29, enters the spiral water channel IV 29, flows through the surface of the right roller body 21 again from the outside to the inside along the spiral water channel IV 29, enters the cooling channel II 18 from the water outlet hole II 31, flows rightward from the middle of the outer roller body 13 along the cooling channel II 18, passes through the end cover flow channel 19 of the right end cover 15 and the liquid outlet flow channel II 8 of the rotary joint II 2, is discharged outwards from the liquid outlet pipe II 10, and is responsible for cooling the right half part of the outer roller body 13 and takes away the right half heat of. The cooling roller is of a symmetrical structure about the middle end, since the cooling of the left and right halves of the outer roller body 13 is the same.

The inner wall of the outer roller body 13 is attached with a first heat-conducting metal layer 35, and the inner wall of the middle roller body 12 is attached with a second heat-conducting metal layer 36. It is worth mentioning that when the film is cooled by the cooling roller, the film is attached to the surface of the outer roller body 13, and the cooling roller is designed into a symmetrical two-way liquid inlet and drainage structure, so that the problems of low cooling efficiency and uneven cooling when the length of the cooling roller is too long are solved. Before cooling water flows into the first cooling channel 17 and the second cooling channel 18 to cool the outer roller body 13, spiral reciprocating flow is performed between the middle roller body 12 and the inner roller body 11, the flow time of the cooling water in the roller body is prolonged, when the cooling water flows in the first spiral water channel 24, the second spiral water channel 25, the third spiral water channel 28 and the fourth spiral water channel 29, the cooling effect on the middle roller body 12 is achieved, cold temperature can be transmitted to the first cooling channel 17 and the second cooling channel 18 in advance through the middle roller body 12, the internal temperature of the first cooling channel 17 and the second cooling channel 18 can be reduced firstly before the cooling water is introduced, namely when the cooling water flows spirally between the middle roller body 12 and the inner roller body 11, the cooling water can also achieve an indirect cooling effect on the outer roller body 13, the effect rate of the cooling water is improved, and sudden shock of the outer roller body 13 after the cooling water enters the first cooling channel 17 and the second cooling channel 18 is avoided, the phenomenon that the temperature difference between the front and the back of the outer roller body 13 is too large is avoided, and the film is cooled uniformly.

Preferably, the first spiral water channel 24 and the second spiral water channel 25 are spiral grooves concavely arranged on the left roller body 20; the third spiral water channel 28 and the fourth spiral water channel 29 are spiral grooves concavely arranged on the right roller body 21.

Optionally, the middle end of the outer wall of the inner roller body 11 is provided with a convex step part 38, the left roller body 20 and the right roller body 21 are separated by the step part 38, and the step part 38 abuts against the middle end of the inner wall of the middle roller body 12; the left roller body 20 is spirally wound with a first protruded drainage strip 39 and a second protruded drainage strip 40, and the widths of the first drainage strip 39 and the second drainage strip 40 are the same. The first drainage strip 39 and the second drainage strip 40 are welded on the outer wall of the left roller body 20, and the first drainage strip 39 and the second drainage strip 40 abut against the inner wall of the middle roller body 12 and define a first spiral water channel 24 and a second spiral water channel 25.

And a third convex drainage strip 41 and a fourth convex drainage strip 42 are spirally wound on the right roller body 21, and the widths of the third convex drainage strip 41 and the fourth convex drainage strip 42 are the same. Drainage strip three 41 and drainage strip four 42 are both welded on the outer wall of right roll body 21, and drainage strip three 41 and drainage strip four 42 are abutted against the inner wall of middle roll body 12, and define spiral water channel three 28 and spiral water channel four 29.

Optionally, a plurality of groups of equally spaced drainage sheet groups 32 are welded on two sides of the retainer ring 16 of the middle roller body 12, each group of drainage sheet group 32 is composed of a plurality of drainage sheets 33, the drainage sheets 33 of each group of drainage sheet group 32 are welded on the outer wall of the middle roller body 12 in a radial shape at intervals, and the positions of the drainage sheets 33 of two adjacent groups of drainage sheet groups 32 are staggered with each other; when the cooling water flows in the first cooling channel 17 and the second cooling channel 18, the drainage sheets 33 play a role in stirring the cooling water, and the laminar flow phenomenon is overcome.

In addition, two ends of the outer roller body 13 are respectively embedded with a thickening sleeve 34, the outer diameter of the thickening sleeve 34 is matched with the inner diameter of the two ends of the outer roller body 13, the thickening sleeve 34 is positioned between the end of the outer roller body 13 and the end of the middle roller body 12, the outer wall of the thickening sleeve 34 is abutted against the inner wall of the outer roller body 13, the thickening sleeve 34 at the left end of the outer roller body 13 is locked and fixed with the left end cover 14 through a fastener, and the thickening sleeve 34 at the right end of the outer roller body 13 is locked and fixed with the right end cover 15 through a fastener; the wall thickness of the thickening sleeve 34 increases gradually from the inside to the outside. The both ends of outer roll body 13 are in the non-work area, and the setting of thickening cover 34 has increased the both ends thickness of outer roll body 13, hinders the cooling at outer roll body 13 both ends of cooling water, avoids the both ends of outer roll body 13 to produce the dewfall phenomenon, is favorable to solving the influence of dewfall to the film quality.

The specific embodiments described herein are merely illustrative of the spirit of the invention. Various modifications or additions may be made to the described embodiments or alternatives may be employed by those skilled in the art without departing from the spirit or ambit of the invention as defined in the appended claims.

Although a swivel joint 1 is used more herein; a second rotary joint 2; a first liquid inlet flow channel 3; a first liquid outlet flow passage 4; a first liquid inlet pipe 5; a first liquid outlet pipe 6; a second liquid inlet flow channel 7; a liquid outlet flow passage II 8; a liquid inlet pipe II 9; a second liquid outlet pipe 10; an inner roller body 11; a middle roller body 12; an outer roller body 13; a left end cap 14; a right end cap 15; a retainer ring 16; a first cooling channel 17; a second cooling channel 18; an end cover flow passage 19; a left roll body 20; a right-side roller body 21; the first liquid inlet channel 22; a second liquid inlet channel 23; a first spiral water channel 24; a second spiral water channel 25; a first connecting groove 26; a first water outlet 27; a third spiral water channel 28; spiral water channel four 29; a second connecting groove 30; a water outlet hole II 31; a set of drainage fins 32; a drainage sheet 33; a thickening sleeve 34; a first heat-conducting metal layer 35; a second thermally conductive metal layer 36; end cap slots 37; a step portion 38; a first drainage strip 39; a second drainage strip 40; a third drainage strip 41; a fourth drainage strip 42; a non-woven fabric layer 43; a film layer 44; adhesive layer 45, etc., but does not exclude the possibility of using other terms. These terms are used merely to more conveniently describe and explain the nature of the present invention; they are to be construed as being without limitation to any additional limitations that may be imposed by the spirit of the present invention.

Claims

1. A preparation method of an operation hole towel cloth base material is used for preparing the operation hole towel cloth base material, the operation hole towel cloth base material comprises a non-woven fabric layer and a thin film layer, the non-woven fabric layer and the thin film layer are bonded and compounded through an adhesive layer, the thin film layer is a polyethylene film, and the polyethylene film comprises the following components in percentage by weight: 704240% of PE particles; 705015% of PE particles; PE particles P0130%; 4% of color additive; 2% of a modified additive; 8% of mildew-proof antibacterial additive; the method is characterized by comprising the following steps:

A) raw material purchasing: purchasing non-woven fabrics, PE particles 7042, PE particles 7050, PE particles P01, a color additive B05, a color additive W01, a modified additive SHJ, a mildew-proof antibacterial additive MKJ1 and TEP903 series glue raw materials;

E) compound mass production: bonding and compounding the non-woven fabric and the polyethylene film prepared in the step D) by using a compounding machine to prepare a finished product, wherein the tension technological parameters of the compounding machine are that the unreeling tension is 0.5-1 Newton, the reeling tension is 1-4 Newton, and the tension adjustment of 0.1 Newton is carried out; the temperature technological parameters are that the temperature of a melting cylinder is 150 +/-2 ℃, the temperature of a throat pipe is 160 +/-2 ℃, the temperature of a spray gun is 160 +/-2 ℃, and the temperature of hot air is 160 +/-2 ℃; the other control parameters are the clearance of the roller of the spray gun is 50 mm;

F) slitting and winding;

G) checking and accepting and packaging;

H) warehousing and delivering;

the double-screw widening type casting machine is provided with a widening type cooling roller, the widening type cooling roller comprises a roller body, a first rotating joint and a second rotating joint, the first rotating joint is installed at the left end of the roller body, the second rotating joint is installed at the right end of the roller body, the first rotating joint is provided with a first liquid inlet flow channel and a first liquid outlet flow channel, the first liquid inlet flow channel is connected with a first liquid inlet pipe, the first liquid outlet flow channel is connected with a first liquid outlet pipe, the second rotating joint is provided with a second liquid inlet flow channel and a second liquid outlet flow channel, the second liquid inlet flow channel is connected with a second liquid inlet pipe; the roller body comprises an inner roller body, a middle roller body, an outer roller body, a left end cover and a right end cover, the middle roller body is sleeved on the inner roller body, the outer roller body is sleeved on the middle roller body, the left end of the inner roller body penetrates through the left end cover, the left end cover is covered on the left end of the middle roller body and the left end of the outer roller body in a sealing mode, a first rotary joint is connected with the left end cover, and the first rotary joint is sleeved and covered on the left end of the inner roller body; the right end of the inner roller body penetrates through the right end cover, the right end cover covers the right end of the middle roller body and the right end of the outer roller body, the second rotary joint is connected with the right end cover, and the second rotary joint is sleeved and sealed at the right end of the inner roller body; the middle roller body is convexly provided with a check ring, the check ring is integrally formed at the middle end of the outer wall of the middle roller body, and the check ring is pressed against the middle end of the inner wall of the outer roller body; a first cooling channel and a second cooling channel are formed between the outer roller body and the middle roller body, end cover flow passages are formed in the left end cover and the right end cover, the end cover flow passage of the left end cover is communicated with the first cooling channel and the first liquid outlet flow passage, and the end cover flow passage of the right end cover is communicated with the second cooling channel and the second liquid outlet flow passage; the inner roller body is divided into a left roller body and a right roller body which are integrally formed and are in a symmetrical structure; the liquid inlet channel I of the first rotary joint is communicated with the liquid inlet channel I of the left roller body; a liquid inlet channel II of the rotary joint II is communicated with a liquid inlet channel II of the right roller body; a first spiral water channel and a second spiral water channel are formed between the left side roller body and the middle roller body, the first spiral water channel and the second spiral water channel are staggered with each other, a first liquid inlet channel extends inwards from the left end of the left side roller body and is communicated with the inner end of the first spiral water channel, the outer end of the first spiral water channel is communicated with the outer end of the second spiral water channel through a first connecting groove, the middle roller body is provided with a first circle of water outlet holes, the first water outlet holes are adjacent to the check ring, and the inner end of the second spiral water channel is communicated with; a spiral water channel III and a spiral water channel IV are formed between the right side roller body and the middle roller body, the spiral water channel III and the spiral water channel IV are staggered with each other, a liquid inlet channel II extends inwards from the right end of the right side roller body and is communicated with the inner end of the spiral water channel III, the outer end of the spiral water channel III is communicated with the outer end of the spiral water channel IV through a connecting groove II, the middle roller body is provided with a circle of water outlet hole II, the water outlet hole II is adjacent to the retainer ring, and the inner end of the spiral water channel IV is communicated; the retaining ring both sides welding of middle roll body has the equidistant spaced drainage piece group of multiunit, and every drainage piece group comprises a plurality of drainage pieces, and the drainage piece of every drainage piece group is radial interval welding on the outer wall of middle roll body, and the position of the drainage piece of adjacent two sets of drainage piece groups staggers each other.

2. The method for preparing an operation hole towel cloth base material according to claim 1, wherein a thickening sleeve is embedded at each end of the outer roller body, the thickening sleeve is positioned between the end part of the outer roller body and the end part of the middle roller body, the outer wall of the thickening sleeve is abutted against the inner wall of the outer roller body, and the wall thickness of the thickening sleeve gradually increases from inside to outside.

3. The method for preparing a surgical hole towel cloth base material according to claim 1, wherein a first heat-conducting metal layer is attached to the inner wall of the outer roller body, and a second heat-conducting metal layer is attached to the inner wall of the middle roller body.