A thermally bonded non-woven fabric and its production method and use

A production method and technology of non-woven fabrics, applied in the direction of separation methods, textiles and papermaking, chemical instruments and methods, etc., can solve the problems of easy crushing of fibers, small amount of dust collection, low strength of non-woven fabrics, etc., and achieve high strength , High dust collection effect

Active Publication Date: 2018-01-02
TORAY IND INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, it does not specify the ratio and thickness requirements of each fiber type, as well as the flame retardant properties used in the automotive industry.
Moreover, the method of heat-setting and strengthening the fiber web layer in this patent is to use a hot embossing roll at about 120-200 degrees, a hot calendering roll, etc. If the roll is heated and strengthened, only the skin-core composite on the surface of the non-woven fabric The fibers are melted and bonded by heat, but the fibers inside the non-woven fabric are not fully bonded or bonded very little, which leads to the phenomenon that the outer layer of fibers is bonded and the inner layer of fibers is not bonded, resulting in low strength of the non-woven fabric , small amount of dust collection and other disadvantages
In addition, through such a reinforcement method, the fibers on the surface will be easily crushed, which will reduce the air permeability.

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
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  • A thermally bonded non-woven fabric and its production method and use
  • A thermally bonded non-woven fabric and its production method and use
  • A thermally bonded non-woven fabric and its production method and use

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0041] 50% by weight of skin-core composite fibers, 30% by weight of flame-retardant fibers, and 20% by weight of 20 denier ordinary polyester fibers are fed, and after opening, carding, and cross-lapping, a composite fiber web layer is formed. Pass the composite fiber web layer above at a speed of 10 m / min through a hot air box at a temperature of 200°C for preliminary thermal bonding, and then pass through a mesh belt with 12 pairs of hot rollers at a speed of 10 m / min at a temperature of 150°C above and below. The hot pressing device is used for heat setting and reinforcement, and the pressure at the entrance of the mesh belt hot pressing device (for non-woven fabrics) is 0kg / cm 2 , the pressure at the outlet is 50 kg / cm 2 . At the same time, the spacing at the entrance of the mesh belt is 40mm, and the spacing at the exit is 0.05mm. After being bonded by cold pressing rolls, the thermally bonded nonwoven fabric of the present invention is finally obtained. Observing the...

Embodiment 2

[0043] 70% by weight of skin-core composite fibers, 20% by weight of flame-retardant fibers, and 10% by weight of ordinary polyester fibers with a denier thickness of 20 denier are fed, and after opening, carding, and cross-lapping, a composite fiber web layer is formed. Pass the above composite fiber web layer through a hot air box with a temperature of 200°C at a speed of 8 m / min for preliminary thermal bonding, and then pass through a mesh belt with 8 pairs of hot rollers above and below 160°C at a speed of 8 m / min. The hot pressing device is used for heat setting and reinforcement, and the pressure at the entrance of the mesh belt hot pressing device (for non-woven fabrics) is 0kg / cm 2 , the pressure at the outlet is 40 kg / cm 2 . At the same time, the spacing at the entrance of the mesh belt is 45mm, and the spacing at the exit is 0.08mm. After being bonded by cold pressing rolls, the thermally bonded nonwoven fabric of the present invention is finally obtained. Observi...

Embodiment 3

[0045] 45% by weight of skin-core composite fibers, 30% by weight of flame-retardant fibers, and 25% by weight of ordinary polyester fibers with a denier thickness of 15 denier are fed, and a composite fiber web layer is formed after opening, carding, and cross-lapping. Preliminary thermal bonding of the above-mentioned composite fiber web layer through a hot air box with a temperature of 250°C at a speed of 15 m / min, and then through a circulation oven at a speed of 15 m / min with 4 pairs of symmetrical hot rollers at 200°C. Heat setting reinforcement, the pressure at the entrance of the hot roller (for non-woven fabrics) is 0kg / cm 2 , the pressure at the outlet is 60 kg / cm 2 . At the same time, the pitch at the entrance of the heat roller is 45 mm, and the pitch at the exit is 0.06 mm. After being bonded by cold pressing rolls, the thermally bonded nonwoven fabric of the present invention is finally obtained. Observing the cross-section of the above-mentioned nonwoven fabr...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
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Abstract

The invention discloses a heat-adhesive non-woven fabric and its production method and application. The non-woven fabric is composed of three kinds of fibers: skin-core composite fiber, flame-retardant fiber and ordinary polyester fiber. The fibers are in a bonding state, and the bonding rate between fibers is 60-99%. The thermally bonded nonwoven fabric of the present invention has the characteristics of high strength and high dust collection capacity, and can be used in the field of air filtration, such as automotive air conditioner filters, household air purifiers, filters for building air conditioners, clean rooms, vehicles It is mainly used in filters for automotive air conditioners.

Description

technical field [0001] The invention relates to a thermal bonding non-woven fabric and a production method thereof, which are applied in the field of air filtration, especially in the field of automobile air conditioning filtration. Background technique [0002] At present, the web forming methods of non-woven fabrics on the market mainly include dry method, wet method, air-laid method, spunbond method, melt-blown method, etc. Among them, dry method is the main method, accounting for the total production of non-woven fabrics. More than 50% of the amount, and the fixing methods after dry-laid netting include acupuncture, spunlace, chemical bonding, thermal bonding, etc. For non-woven fabrics used in the field of air filtration, they need to have the characteristics of high air permeability and high dust collection. Therefore, low-weight non-woven fabrics formed by dry chemical bonding and dry thermal bonding are widely used, but chemical bonding The problems of the three was...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): D04H1/4382D04H1/542D04H1/435B01D39/08
Inventor 蔡文杰纪舜卿
Owner TORAY IND INC
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