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Method and apapratus for foam casting using three-dimensional molds

A foam, three-dimensional technology, applied in home appliances, other home appliances, applications, etc., can solve the problems of reducing the durability of finished products and reducing the quality of finished products

Inactive Publication Date: 2007-07-18
AHLSTROM MUNKSJO OYJ
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Second, mechanical changes in the formed filter paper reduce the durability of the finished product
Bending the formed flat filter paper to form pleats and grooves creates stress on the bends which degrades the quality of the finished product through rapid deterioration

Method used

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  • Method and apapratus for foam casting using three-dimensional molds
  • Method and apapratus for foam casting using three-dimensional molds
  • Method and apapratus for foam casting using three-dimensional molds

Examples

Experimental program
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Embodiment Construction

[0033] Figure 1 is a schematic diagram of a prior art process for producing filter paper using foam in an on-line manner. First, the fabric is formed using a foam-laying process as shown in numeral 10, in which a slurry of air, water, surfactants, and fibers is moved into contact with a movable porous The foam is removed from the material through the conveyor to form a non-woven fabric. The fibers are short fibers having a length of 50 mm or less. Fibers may be formed from synthetic materials, mechanical wood pulp, chemical wood pulp, and other fibrous materials. Drying and other conventional steps are also performed during the processing of the foam.

[0034] The remaining steps in Figure 1 can be adapted to the hydrojet-laid process, if desired, with conventional resin or latex impregnation at 11 to enhance the properties of the fabric, and conventional grooving at 12. Steps 10, 11 and 12 are usually carried out in a fabric production facility. The conventional folding s...

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Abstract

Disclosed is a method of producing a non-woven web of fibrous or particulate material comprising: formation of a foam slurry; deposition of that slurry onto a foraminous element having a three-dimensional mold; and formation of a web having a three-dimensional shape that is not substantially planar by removal of foam from the slurry through the foraminous element and drying the web. An apparatus therefor is also disclosed. The method may be used in production a variety of products, including automotive pleated fluid and air filters, pleated heating and / or air conditioning (HVAC) filters, shaped breathing mask filters and bacterial filters, laminated cleaning products with super-absorbent middle layers, such as a mop wipe shape to fit a cleaning mop head, and other products.

Description

technical field [0001] The present invention relates to the application of the foam process from specific raw materials to manufacture nonwoven fabrics and to manufacture specific finished products. The foam process is essentially as described in U.S. Patent Nos. 3,716,449, 3,871,952, and 3,938,782 (the disclosures of which are incorporated herein by reference), pending U.S. Application No. 08 / 923,900 filed September 4, 1997 (Attorney Docket No. 30-441), and in US Application No. 09 / 098458, filed June 17, 1998 (Attorney Docket 30-476), the disclosures of which are incorporated herein by reference in their entirety. Background technique [0002] The foam process is commonly used in the fabric forming process to create flat templates with uniform thickness, that is, two-dimensionally shaped templates. In accordance with the present invention, a three-dimensionally shaped template is formed from one or more foam layers by using a three-dimensional mold in the fabric forming pr...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): D04H1/00D21J3/00B29C39/16B29K105/04B29K105/08B29L31/14D21F11/00
CPCD21F11/002B29C44/20
Inventor J·乔治A·格罗索E·莱尼H·拉希亚拉K·雷克曼
Owner AHLSTROM MUNKSJO OYJ