阅读说明：本技术 一种口罩全塑鼻梁条的制备方法及制得的口罩全塑鼻梁条 (Preparation method of all-plastic mask nose bridge strip and all-plastic mask nose bridge strip prepared by same ) 是由 聂孙建 周冠辰 杨东 徐辉 古俊飞 付素雅 胡呈杰 刘文明 于 2020-06-23 设计创作，主要内容包括：本发明公开一种口罩全塑鼻梁条的制备方法,包括以下步骤：(1)将高密度聚乙烯、聚丙烯、氧化钙母粒、硅油、钛白粉混合,高密度聚乙烯、聚丙烯、氧化钙母粒、硅油与钛白粉的质量比为1:0.16:0.1:0.001:0.011；(2)将步骤(1)中的混合料加入到挤出机中,调节牵引1、牵引2和牵引3的转速分别为150-320、750-1600、990-1850r/min,牵引1转速与牵引2的转速之比为1：4.9-5.1,挤出拉伸后,经过冷水槽定型。本发明还提供由上述制备方法制得的口罩全塑鼻梁条。本发明的有益效果在于：采用上述质量比的原料制备的鼻梁条,其回弹性低,力学性能较优。(The invention discloses a preparation method of a full-plastic mask nose bridge strip, which comprises the following steps: (1) mixing high-density polyethylene, polypropylene, calcium oxide master batch, silicone oil and titanium dioxide, wherein the mass ratio of the high-density polyethylene, the polypropylene, the calcium oxide master batch, the silicone oil and the titanium dioxide is 1:0.16:0.1:0.001: 0.011; (2) adding the mixture obtained in the step (1) into an extruder, adjusting the rotating speeds of traction 1, traction 2 and traction 3 to be 150-: 4.9 to 5.1, and shaping through a cold water tank after extrusion and stretching. The invention also provides the all-plastic nose bridge strip for the mask prepared by the preparation method. The invention has the beneficial effects that: the nose bridge strip prepared from the raw materials with the mass ratio has low resilience and excellent mechanical property.)

1. A preparation method of a full-plastic mask nose bridge strip is characterized by comprising the following steps: the method comprises the following steps:

(1) mixing high-density polyethylene, polypropylene, calcium oxide master batch, silicone oil and titanium dioxide, wherein the mass ratio of the high-density polyethylene, the polypropylene, the calcium oxide master batch, the silicone oil and the titanium dioxide is 1:0.16:0.1:0.001: 0.011;

(2) adding the mixture obtained in the step (1) into an extruder, sequentially passing through a traction machine 1, a traction machine 2, a cold water tank and a traction machine 3, and adjusting the rotating speeds of the traction machine 1, the traction machine 2 and the traction machine 3 to be 150-750-1600 r/min, 990-1850r/min respectively, wherein the ratio of the rotating speed of the traction machine 1 to the rotating speed of the traction machine 2 is 1: 4.9 to 5.1, and after extrusion and stretching, shaping through a cold water tank to obtain the all-plastic nose bridge strip of the mask.

2. The method for preparing the all-plastic nose bridge strip for the mask according to claim 1, wherein the method comprises the following steps: adjusting the mixture to be molten after sequentially passing through a heating zone 1, a heating zone 2, a heating zone 3 and a heating zone 4 in an extruder barrel, extruding and molding the mixture through a mould 1 zone, then entering a hot water tank, and finally carrying out traction, wherein the temperature of each zone of the heating zone 1, the heating zone 2, the heating zone 3 and the heating zone 4 is 195, 200, 210, 215 and 220 ℃, and the temperature of the mould 1 zone is 220 ℃.

3. The method for preparing the all-plastic nose bridge strip of the mask according to claim 2, wherein the method comprises the following steps: the temperature of the hot water in the hot water tank is 40 ℃.

4. The method for preparing the all-plastic nose bridge strip for the mask according to claim 1, wherein the method comprises the following steps: and (2) drying the mixture in the step (1), wherein the drying temperature is 65 ℃, and the drying time is 3 h.

5. The method for preparing the all-plastic nose bridge strip for the mask according to claim 1, wherein the method comprises the following steps: the temperature of cold water in the cold water tank is 20 ℃.

6. The method for preparing the all-plastic nose bridge strip for the mask according to claim 1, wherein the method comprises the following steps: and (4) winding the all-plastic nose bridge strip of the extruded and stretched mask into a coreless wire coil.

7. The method for preparing the all-plastic nose bridge strip for the mask according to claim 1, wherein the method comprises the following steps: the rotational speeds of traction 1, traction 2 and traction 3 are adjusted to be 200, 1004 and 1134r/min respectively.

8. An all-plastic nose bridge for a mask manufactured by the manufacturing method of any one of claims 1 to 7.

Technical Field

The invention relates to the technical field of a mask nose bridge strip, in particular to a method for preparing a full-plastic mask nose bridge strip and the full-plastic mask nose bridge strip prepared by the method.

Background

At present, a nose bridge strip used by a disposable mask is prepared by wrapping iron wires with polyolefin polymers. The iron wire in the iron core nose bridge strip needs to be specially treated to reach the medical standard, the bending effect of the material is good, but the metal sharp corner can cause damage to the human body, more importantly, the metal material and the non-woven fabric polypropylene material are mixed together, so that the separation and recovery of the waste mask after use become difficult, and the environment protection is not facilitated.

The plastic nose bridge strip does not contain metal materials, can be similar with the non-woven fabrics compatible, recycles after the use and makes harmless plastic products, improves the recycle efficiency, for example the patent application publication plasticity gauze mask nose bridge layering of publication No. CN101831111A, the material component of this layering is by weight: 75-85% of polypropylene, 14-22% of polyvinyl chloride (PVC) and 1-3% of a setting agent.

However, the rebound rate of the all-plastic nose bridge strip in the prior art is high, and the fixed protection of the mask is affected.

Disclosure of Invention

The invention aims to solve the technical problem that the full-plastic nose bridge strip in the prior art has high rebound rate and influences the fixed protection of a mask, and provides a preparation method of the full-plastic nose bridge strip for the mask.

The invention solves the technical problems through the following technical means:

a preparation method of a full-plastic mask nose bridge strip comprises the following steps:

(1) mixing high-density polyethylene, polypropylene, calcium oxide master batch, silicone oil and titanium dioxide, wherein the mass ratio of the high-density polyethylene, the polypropylene, the calcium oxide master batch, the silicone oil and the titanium dioxide is 1:0.16:0.1:0.001: 0.011;

(2) adding the mixture obtained in the step (1) into an extruder, sequentially passing through a traction machine 1, a traction machine 2, a cold water tank and a traction machine 3, and adjusting the rotating speeds of the traction machine 1, the traction machine 2 and the traction machine 3 to be 150-750-1600 r/min, 990-1850r/min respectively, wherein the ratio of the rotating speed of the traction machine 1 to the rotating speed of the traction machine 2 is 1: 4.9 to 5.1, and after extrusion and stretching, shaping through a cold water tank to obtain the all-plastic nose bridge strip of the mask.

Has the advantages that: the nose bridge strip prepared by adopting the raw materials with the mass ratio has low rebound resilience and better mechanical property, and if the rebound resilience is larger, the full-plastic nose bridge strip is difficult to play a role in fixing and protecting.

Preferably, after the mixture is adjusted to be molten through a heating zone 1, a heating zone 2, a heating zone 3 and a heating zone 4 in sequence in an extruder barrel, the mixture is extruded and molded through a mould 1 zone, then enters a hot water tank, and finally is drawn, wherein the temperatures of the heating zone 1, the heating zone 2, the heating zone 3 and the heating zone 4 are 195, 200, 210, 215 and 220 ℃ respectively, and the temperature of the mould 1 zone is 220 ℃.

Preferably, the temperature of the hot water in the hot water tank is 40 ℃.

Preferably, the mixture is dried in the step (1), the drying temperature is 65 ℃, and the drying time is 3 hours.

Preferably, the temperature of the cold water in the cold water tank is 20 ℃.

Preferably, the all-plastic nose bridge strip of the extruded and stretched mask is wound into a coreless wire coil.

Preferably, the rotational speeds of traction 1, traction 2 and traction 3 are adjusted to 200, 1004, 1134r/min, respectively.

The invention aims to solve the technical problem that the full-plastic nose bridge strip in the prior art has high rebound rate and influences the fixed protection of a mask, and provides the full-plastic nose bridge strip for the mask.

The invention solves the technical problems through the following technical means:

a full-plastic nose bridge strip for mask prepared by the above method is provided.

Has the advantages that: the prepared all-plastic nose bridge strip for the mask has low resilience and excellent mechanical property.

The invention has the advantages that: the all-plastic nose bridge strip prepared by the preparation method disclosed by the invention is low in rebound resilience and excellent in mechanical property, can be similar and compatible with a disposable mask material non-woven fabric, improves the recovery efficiency, and can replace the effect of a plastic-coated iron nose bridge strip in a mask.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the embodiments of the present invention, and it is obvious that the described embodiments are some embodiments of the present invention, but not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Test materials, reagents and the like used in the following examples are commercially available unless otherwise specified. High Density Polyethylene (HDPE) type DFDA 7042; polypropylene (PP) HTP-1000 was purchased from Confucian New materials, Inc.; the calcium oxide master batch was purchased from Shanghai Xiner New Material science and technology Co., Ltd.

The extruder was purchased from Enbecd machines, Inc., Suzhou, model WD-50.