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China-hemp fabric with low formaldehyde and permanent flame retardation

A permanent, low-formaldehyde technology, applied in plant fibers, textiles, papermaking, fiber treatment, etc., can solve problems such as easy to wrinkle, difficult to dye through, and increased formaldehyde content, achieve good results, increase flame-retardant properties, and reduce costs low effect

Inactive Publication Date: 2017-03-29
SHANDONG LUSHI SPECIAL FABRIC TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] Hemp is a new type of hemp fiber, known as the "king of natural fibers". The fabric made of hemp has multiple functions such as moisture absorption, ventilation, and heat dissipation. It can be used for both military and civilian purposes. Due to the problems of low depth, difficult to dye through and easy to wrinkle, various pretreatments and chemical modifications are used to improve the dyeability of hemp fiber, and the dyeing depth and dyeing performance are improved. However, in order to dye firmly, various dyeing The addition of additives also increases the content of formaldehyde in the hemp fabric, and the anti-wrinkle finishing will also increase the content of formaldehyde

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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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0015] Low-formaldehyde permanent flame-retardant hemp fabric, including pre-treatment and post-treatment, the pre-treatment includes:

[0016] (1) Modification of formaldehyde scavenger: the hemp fabric is modified with polyvinyl alcohol for free formaldehyde, the treatment time is 1h, repeated 2 times of treatment, and dried;

[0017] (2) Adsorption of formaldehyde: In order to remove formaldehyde in the adsorbed state, use activated alumina and place it in a sealed environment at 92°C for 12 hours;

[0018] The post-treatment is carried out in the ammonia fumigation chamber, and the ammonia fumigation chamber has multiple nozzles to supply ammonia during ammonia fumigation, so as to ensure uniform ammonia gas concentration during ammonia fumigation, so that ammonia and formaldehyde can fully react.

[0019] An air filter device is set at the fabric inlet of the ammonia fumigation room to prevent the fabric from bringing in air to dilute the ammonia concentration, and an amm...

Embodiment 2

[0021] Low-formaldehyde permanent flame-retardant hemp fabric, including pre-treatment and post-treatment, the pre-treatment includes:

[0022] (1) Modification of formaldehyde scavenger: the hemp fabric is modified with ethylene urea to free formaldehyde. The treatment time is 1 hour, and the treatment is repeated twice, and then dried;

[0023] (2) Adsorption of formaldehyde: In order to remove formaldehyde in the adsorbed state, use activated alumina and place it in a sealed environment at 100°C for 12 hours;

[0024] The post-treatment is carried out in the ammonia fumigation chamber, and the ammonia fumigation chamber has multiple nozzles to supply ammonia during ammonia fumigation, so as to ensure uniform ammonia gas concentration during ammonia fumigation, so that ammonia and formaldehyde can fully react.

[0025] An air filter device is set at the fabric inlet of the ammonia fumigation room to prevent the fabric from bringing in air to dilute the ammonia concentration,...

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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PUM

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Abstract

The invention relates to the technical field of fabric for formaldehyde scavenging, and especially relates to China-hemp fabric with low formaldehyde and permanent flame retardation. Pretreatment and aftertreatment are provided; the pretreatment comprises the following steps: (1) modification with a formaldehyde capture agent: modification treatment is carried out for free formaldehyde by using the organic capture agent for China-hemp fabric, treatment time is 1 hour, treatment is repeated for twice, and drying is carried out; (2) adsorption of formaldehyde: in order to remove formaldehyde in adsorption state, active aluminum oxide is used, and the fabric is placed in a sealed environment for 12 hours at 92-100 DEG C. The aftertreatment is carried out in an ammonia fumigation room, multiple nozzles are used for supplying ammonia in the ammonia fumigation room during ammonia fumigation, in order to guarantee uniform ammonia gas concentration during ammonia fumigation, and an air filtration unit is arranged at a fabric entrance of the ammonia fumigation room, in order to prevent air brought by the fabric from diluting concentration of ammonia gas, and an ammonia gas filtering apparatus is arranged at a fabric exit of the ammonia fumigation room. The fabric has the beneficial effects that the pretreatment and the aftertreatment are carried out, so that the formaldehyde content in the China-hemp fabric is reduced to 60mg / kg, the formaldehyde scavenging is good, and the cost is low.

Description

technical field [0001] The invention relates to the technical field of removing formaldehyde from fabrics, in particular to a low-formaldehyde permanent flame-retardant hemp fabric. Background technique [0002] Hemp is a new type of hemp fiber, known as the "king of natural fibers". The fabric made of hemp has multiple functions such as moisture absorption, ventilation, and heat dissipation. It can be used for both military and civilian purposes. Due to the problems of low depth, difficult to dye through and easy to wrinkle, various pretreatments and chemical modifications are used to improve the dyeability of hemp fiber, and the dyeing depth and dyeing performance are improved. However, in order to dye firmly, various dyeing The addition of additives also increases the content of formaldehyde in the hemp fabric, and the anti-wrinkle finishing also increases the content of formaldehyde. Formaldehyde has stimulating, carcinogenic and mutagenic effects. In view of the variou...

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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IPC IPC(8): D06M15/333D06M13/432D06M11/45D06M11/60D06M101/06
Inventor 芦天龙刘登云芦长江曲岐山魏维
Owner SHANDONG LUSHI SPECIAL FABRIC TECH