Rapid forming method of nose bridge strip for mask

A molding method and nose bridge technology, applied in the field of masks, can solve the problems of difficulty in separating and recycling discarded masks, protection of unfavorable environment, and difficulty in material recycling.

Inactive Publication Date: 2021-05-18
安徽聚屹新材料科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Among them, the nose bridge of the iron wire is polyolefin polymer-coated galvanized fine steel wire. The specific method is to coat a layer of polyolefin polymer material on the galvanized fine steel wire with a diameter of 0.45-0.55mm. The bending performance of this mixed material and The appearance is good, but after this kind of nose bridge is discarded, it is difficult to separate the galvanized fine steel wire from the polyolefin polymer material, and the material recycling is difficult, which is not conducive to the protection of the environment; the aluminum nose bridge is stamped from metal aluminum plate, The advantage of aluminum is that it has good bending effect, strong shaping ability, hot melt adhesive on the back, which can quickly bond with the mask body, which improves production efficiency, and the aluminum nose bridge is stamped, which can be mass-produced quickly. It is mainly used for N95 and KN95 masks. However, the use of aluminum nose bridges also has the above-mentioned problems, that is, due to the mixing of metal materials and non-woven fabrics, it becomes difficult to separate and recycle waste masks after use, which is not conducive to environmental protection.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0051] A molding method for a nose bridge strip for a mask:

[0052] (1) Use a high-speed mixer to mix polyethylene resin, polypropylene resin, ultrafine inorganic powder titanium dioxide, lubricant ethylene bisstearamide, silane coupling agent and antioxidant, and then feed into the extruder Melt extrusion, after traction and stretching, a strip-shaped skeleton is obtained;

[0053] The mixed material fed into the extruder passes through the heating zone 1, heating zone 2, heating zone 3, and heating zone 4 of the extruder barrel in sequence, and then is extruded through the mold; wherein, the temperature of the heating zone 1 is 190 ℃, the temperature of heating zone 2 is 200 ℃, the temperature of heating zone 3 is 210 ℃, the temperature of heating zone 4 is 220 ℃, and the temperature of mold is 220 ℃;

[0054] The material extruded by the extruder passes through three traction zones, and the speeds of the three traction zones are 200rpm, 1000rpm, and 1150rpm in turn;

[0...

Embodiment 2

[0061] This embodiment is basically the same as the molding method of the bridge of the nose strip in Example 1. The difference is that among the raw material components used to prepare the bar-shaped skeleton, the strip-shaped skeleton is made of the following components in weight percentage: polyethylene resin (Paxon TM AD60-005, the melt index is 0.47g / 10min (190℃, 2.16kg), the density is 0.963g / cm 3 ) 55 parts, polypropylene resin (ExxonMobil TM PP1304E6 melt index is 13g / 10min) 45 parts, titanium dioxide (120nm) 5 parts, lubricant ethylene bisstearamide 0.1 part, silane coupling agent (grade KH151) 0.2 part, antioxidant AT10 0.15 part, antioxidant Agent triphenyl phosphite 0.3 part;

[0062] Keeping the rest unchanged, the nose bridge strip is prepared.

Embodiment 3

[0064] This embodiment is basically the same as the molding method of the bridge of the nose strip in Example 1. The difference is that among the raw material components used to prepare the bar-shaped skeleton, the strip-shaped skeleton is made of the following components in weight percentage: polyethylene resin (Paxon TM AD60-005, the melt index is 0.47g / 10min (190℃, 2.16kg), the density is 0.963g / cm 3 ) 75 parts, polypropylene resin (ExxonMobil TM PP1304E6 melt index is 13g / 10min) 22 parts, titanium dioxide (120nm) 3 parts, lubricant ethylene bisstearamide 0.15 parts, silane coupling agent (brand is KH151) 0.15 parts, antioxidant AT10 0.1 parts, antioxidant Agent triphenyl phosphite 0.2 parts;

[0065] Keeping the rest unchanged, the nose bridge strip is prepared.

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Abstract

The invention relates to the technical field of masks, in particular to a rapid forming method of a nose bridge strip for a mask. The method comprises the following steps of (1), uniformly mixing polyethylene resin, polypropylene resin, superfine inorganic powder, a lubricant, a coupling agent and an antioxidant, then blanking into an extruder for melt extrusion, and drawing and stretching to obtain a strip-shaped framework; and (2), continuously dipping the strip-shaped framework in pre-molten surface layer film coating melt, and cooling and shaping to obtain a nose bridge strip finished product. According to the method, the on-line film coating is adopted, the step of cooling and shaping the strip-shaped framework is omitted, the temperature of an extruded material is gradually reduced from more than two hundred DEG C of a discharge hole of the extruder, the extruded material still has higher residual temperature when being dipped into the surface layer film coating melt, the surface layer film coating is more uniformly dipped, and the energy consumption for keeping the molten state of the surface layer film coating melt is reduced; and the problem that the plasticity effect is affected due to uneven internal stress of a high polymer material caused by overlarge temperature difference of the strip-shaped framework is avoided.

Description

technical field [0001] The invention relates to the technical field of masks, in particular to a rapid prototyping method for nose bridge strips for masks. Background technique [0002] The mask is composed of non-woven fabric, melt-blown fabric, ear strap and nose bridge strip. Among them, the function of the bridge of the nose is to make the mask fit the face better, to ensure that bacteria and droplets are not easy to enter through the junction of the mask and the face, and to ensure the protective effect of the mask. The nose bridge strip needs to have a good force-bearing shape, and it will not rebound when it is not stressed, and keep the existing shape without deformation. [0003] In the prior art, commonly used nose bridge strips mainly include wire nose bridge and aluminum nose bridge. Among them, the nose bridge of the iron wire is a polyolefin polymer coated galvanized fine steel wire. The specific method is to coat a layer of polyolefin polymer material on the...

Claims

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Application Information

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Patent Type & AuthorityApplications(China)
IPC IPC(8): B29C69/02C08J7/044C08L23/06C08L23/12C08K13/02C08K3/22C08K5/20C08K5/526
CPCB29C69/02C08J2323/06C08J2423/12C08J2467/04C08K5/20C08K5/526C08K13/02C08K2003/2241C08K2201/011C08J7/0427C08J7/044
Inventor刘娟王耀明李芳
Owner安徽聚屹新材料科技有限公司