CN100406642C - Flame Retardant Coating Process for Heavy Fabrics - Google Patents

Abstract

The invention discloses a flame retardant coating process for heavy fabrics, and relates to a fabric flame retardant processing process. It adopts mechanical foaming of low-viscosity flame-retardant glue to achieve the purpose of thickening, so that it has coating processability. After scraper coating, the foam is broken during the scraping and extrusion process and becomes low-viscosity again. The flame retardant glue penetrates into the coated substrate and then dries to make the overall flame retardant performance of the fabric meet the requirements. It solves the problems of complicated process, poor flame retardant effect, poor fabric comfort and safety, and high cost in the flame retardant of heavy fabrics.

Description

Flame Retardant Coating Process for Heavy Fabrics

technical field

The invention discloses a flame retardant coating process for heavy fabrics, and relates to a fabric flame retardant processing process.

Background technique:

Flame retardant finishing (padding) and flame retardant coating methods are mostly used in the flame retardant treatment of fabrics. The flame retardant coating method is being accepted by more and more people because it does not affect the fabric performance of the non-coated surface and has better safety and comfort. However, for thick and dense fabrics, it is difficult for ordinary flame-retardant coatings to meet the overall flame-retardant requirements, because the thick and tight fabrics block the permeability of flame-retardant adhesives, resulting in non-coated surfaces that cannot be protected by flame-retardant protection, so that the overall The flame retardant performance of the fabric cannot meet the flame retardant requirements. Therefore, at present, for thick and heavy fabrics, flame-retardant finishing or flame-retardant finishing first, and then flame-retardant coating are mostly used. In this way, there are problems such as complex process, poor flame retardant effect, poor fabric comfort and safety, and high cost.

Contents of the invention

The purpose of the present invention is to overcome the defects of the prior art, and propose a foam flame retardant coating process, which solves the complicated process in the flame retardant of heavy fabrics, poor flame retardant effect, poor fabric comfort and safety, and high cost. high question.

The technical solution of the present invention is: use mechanical foaming of low-viscosity flame-retardant glue to achieve the purpose of thickening, so that it has coating processability, after the scraper coating, the foam is broken during the scraping and extrusion process, It turns into a low-viscosity flame-retardant glue again, penetrates into the coated substrate, and then dries to make the overall flame-retardant performance of the fabric meet the requirements.

Detailed ways

Add the flame retardant coating glue into the mechanical foaming machine, the flame retardant coating glue is self-prepared, the main component is water-based coating adhesive (solid content 30-50%, viscosity 1000-5000mpa·s), which is acrylic polymer It can also be polymers such as polyurethane, vinyl chloride, polyester, polyamide, styrene-butadiene; the flame retardant can be a halide, (antimony trioxide, or other nitrogen and phosphorus flame retardants, commercially available), The addition amount is 5-70%, and the foaming ratio is controlled between 1:1.2-10 (adjusted according to the thickness and density of the fabric). The above-mentioned styrofoam is applied on the surface of the cloth to be processed on the coating platform through the pipeline, the downward knife distance of the knife edge is 1-30mm, the front and rear knife distance is 1-30mm, the vehicle speed is 5-50m/min, the temperature is 110-170℃, after After coating, the amount of sizing on the fabric is controlled within the range of 20-250g/m ² (dry weight).

Compared with the prior art, the advantages of the invention are: 1) the processing technology is simple and the operability is strong; 2) the flame retardant performance is excellent, the cost is low, the original comfort and safety of the fabric are maintained, and the thick and compact fabric is effectively solved. 3) semi-durable, can withstand 40 ℃ water immersion.

Comparison of Flame Retardant Performance with Existing Technology

Example 1

Flame-retardant coating glue (acrylic adhesive 100kg, purchased from National Startch & Chemical Ltd. Viscosity 4000mpa s, 15kg of decabromodiphenyl ether with a particle size of 1-15μm, 5kg of antimony trioxide with a particle size of 1-15μm, Commercially available, 0.5kg of phosphate dispersant, high-speed shearing machine disperses for 30 minutes) is put into mechanical foaming machine, and foaming ratio is 1: 2, is coated on 300g/m ² full polyester imitation by knife coating mode On suede fabrics, adjust the upper and lower knife distances to 2-7mm downward, the front and rear knife distances to 2-15mm, the speed of the machine at 25m/min, the temperature at 150-170℃, and the amount of glue applied at 100g/m ² (dry weight), tested by experiment , can pass BS5852 and other standards.

Example 2

Flame-retardant coating glue (acrylic adhesive 100kg, purchased from National Startch & Chemical Ltd. Viscosity 4000mpa s, 15kg of decabromodiphenyl ether with a particle size of 1-15μm, 5kg of antimony trioxide with a particle size of 1-15μm, Commercially available, 0.5kg of phosphate-based dispersant, high-speed shearing machine for 30 minutes) is coated on 290g/ ^m2 cotton canvas fabric by knife coating, and the upper and lower knife distance is adjusted to be 2-7mm downward. The front and rear cutter distance is 2-15mm, the vehicle speed is 25m/min, the temperature is 150-170℃, and the amount of glue applied is 90g/m ² (dry weight). After experimental testing, it can pass BS5852 and other standards.

Example 3

Flame retardant coating glue (ethylene-vinyl chloride copolymer adhesive 100kg, viscosity 3000mpa s, decabromodiphenyl ether 5kg particle size 1-15μm, 15kg antimony trioxide 1-15μm, 0.3kg phosphate dispersion agent, commercially available, high-speed shearing machine dispersed for 30 minutes) into a mechanical foaming machine, the foaming ratio is 1:1.5. It is coated on the composite of 400g/ ^m2 suede and cotton gauze by knife coating On the cloth, adjust the upper and lower knife distances to be 5-15mm downward, the front and rear knife distances to 2-15mm, the speed of the machine to be 15m/min, the temperature to be 150-170°C, and the amount of glue to be applied to be 110g/ ^m2 (dry weight). After experimental testing, it can pass BS5852 and other standards.

Example 4

Flame retardant coating glue (ethylene-vinyl chloride copolymer adhesive 100kg, viscosity 3000mpa-s, decabromodiphenyl ether 5kg particle size 1-15μm, antimony trioxide 1-15μm, 15kg, 0.3kg phosphate Dispersant, commercially available, high-speed shearing machine disperses for 30 minutes) into a mechanical foaming machine with a foaming ratio of 1:1.5. It is coated on the T/C fabric of 350g/ ^m2 by knife coating, and adjusted up and down The knife distance is 5-15mm downward, the front and rear knife distance is 2-15mm, the speed is 18 ¹ m/min, the temperature is 150-170°C, the amount of glue is 120g/m ² (dry weight), and the experimental test can pass BS5852 and other standards .

Claims (2)

1. the flame retardant coating technology of a heavy fabric, it is characterized in that adopting and low sticking flame-retardant coatings glue is carried out mechanical foaming reach thickening, after passing through the scraper coating again, foam fragmentation in blade coating extrusion process, again become low sticking fire retardant glue, be penetrated in the coated base material, dry then and make, wherein

The flame-retardant coatings glue main component has aqueous coating adhesive 30-95%, solid content 30-50%, and viscosity 1000-5000mpas, fire retardant is 5-70%, blowing ratio is controlled at 1: between the 1.2-10;

Adhesive is selected from acrylate copolymer, polyurethane, ethene vinyl chloride, polyester, polyamide, butylbenzene;

Fire retardant is a halide, is selected from antimonous oxide or nitrogen phosphorus type flame retardant.

2. flame retardant coating technology as claimed in claim 1, it is characterized in that the fire retardant glue after the above-mentioned foaming is imposed on the cloth cover to be processed on the coating platform by pipeline, the downward cutter of the edge of a knife is apart from 1-30mm, and the front and back cutter is apart from 1-30mm, speed of a motor vehicle 5-50m/min, temperature 110-170 ℃.