HEPA production method

A production process and hot-melt temperature technology, applied in the field of air purification, can solve problems such as heavy odor and unsightly shape, and achieve the effect of avoiding odor problems.

Inactive Publication Date: 2018-05-08
A O SMITH CHINA WATER HEATER CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the current market, relatively short fibers (which can be called staple fibers) are mixed with acrylic esters to make PET non-woven fabrics using papermaking technology. If acrylates are added less, the PET non-woven fabrics made are relatively It is soft, the shape is not good-looking, and it is not very stiff, so the amount of acrylic ester added is generally about 40%. There is no problem with this material itself, but when it comes to laminating and discounting processes, the acrylic ester will volatilize under the action of high temperature When it comes out, the gaseous molecules are easy to adhere to the PP layer. Therefore, in the process of blowing through the wind, all the sour gaseous molecules are blown out and dispersed in the air, producing a heavy odor.

Method used

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Embodiment 1

[0033] The present embodiment provides a kind of production technology of HEPA, and it comprises the following steps:

[0034] (1) PET molding: Use two parallel nozzles to spray PET with different melting temperatures, so that the formed two PET filaments are adhered together to form PET filaments, wherein the melting temperatures of the two PETs are respectively 250°C and 170°C;

[0035] Weaving PET filament into PET layer, wherein, the weight of PET layer is controlled as 65g / m 2 ;

[0036] (2) PP forming: PP particles are directly sprayed and formed under a pressure greater than 100°C and 3MPa, and directly made into a PP layer, wherein the weight of the PP layer is controlled to 25g / m 2 ;

[0037] (3) Bonding: hot-melt the hot-melt adhesive into a fluid state, spray it on the surface of the PET layer, and then attach the PP layer to the surface of the PET layer with the hot-sol to form a composite layer structure;

[0038] Among them, the composition of the hot melt ad...

Embodiment 2

[0043] The present embodiment provides a kind of production technique of HEPA, and it comprises the following steps:

[0044] (1) PET molding: Use two parallel nozzles to spray PET with different melting temperatures, so that the formed two PET filaments are adhered together to form PET filaments, wherein the melting temperatures of the two PETs are respectively 250°C and 170°C;

[0045] Weaving PET filament into PET layer, wherein, the weight of PET layer is controlled to be 70g / m 2 ;

[0046] (2) PP molding: PP particles are directly sprayed and molded at a pressure greater than 100°C and 3MPa, and directly made into a PP layer, wherein the weight of the PP layer is controlled at 20g / m 2 ;

[0047] (3) Bonding: hot-melt the hot-melt adhesive into a fluid state, spray it on the surface of the PET layer, and then attach the PP layer to the surface of the PET layer with the hot-sol to form a composite layer structure;

[0048] Among them, the composition of the hot melt adhes...

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Abstract

The invention provides a HEPA production method. The method comprises PET molding: preparing PET filaments from two types PET at different melting temperatures and preparing a PET layer from the PET filaments, PP molding: spin-casting PP particles and preparing a PP layer, pasting: applying a hot melt adhesive to the PET layer through a spraying or powder spraying method and pasting the PP layer to the PET layer to obtain a composite layer structure, bending and setting: bending and hot-setting the composite layer structure, and adhesive tape loading: applying an adhesive tape to the bent composite layer structure to obtain HEPA. The production method can reduce the pungent odor of the product after processing and improve user comfort.

Description

technical field [0001] The invention relates to a production process of HEPA, which belongs to the technical field of air purification. Background technique [0002] HEPA (high-efficiency filter material) is a key component in the air purifier, which is mainly formed by bonding PET layers and PP layers together after discounting. Wherein, the existing PET layer is made of PET filament through weaving. [0003] The preparation of PET filament usually adopts chemical bonding method, and the adhesive used is acrylate. In the current market, relatively short fibers (which can be called staple fibers) are mixed with acrylic esters to make PET non-woven fabrics using papermaking technology. If acrylates are added less, the PET non-woven fabrics made are relatively It is soft, the shape is not good-looking, and it is not very stiff, so the amount of acrylic ester added is generally about 40%. There is no problem with this material itself, but when it comes to laminating and disco...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B32B27/36B32B27/02B32B27/08B32B27/12B32B7/12B32B7/08B32B33/00B32B37/12B32B37/06D01D5/32D01D5/34B01D46/10
CPCB01D46/10B32B5/26B32B7/08B32B7/12B32B33/00B32B37/06B32B37/12B32B2037/1269B32B2250/20B32B2262/0253B32B2262/0284D01D5/32D01D5/34
Inventor 季兵颜松杨林峰徐超
Owner A O SMITH CHINA WATER HEATER CO LTD
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