Modification method and application of polyvinyl alcohol nonwoven fabric
A polyvinyl alcohol and non-woven technology, which is applied in the processing of textile materials, textiles and papermaking, liquid/gas/vapor textile processing, etc., can solve the problems of inability to directly obtain modified polyvinyl alcohol fiber composite materials, etc. Achieve the effect of soft and more comfortable hand feel, improved elongation at break, and excellent heat sealing performance
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Embodiment 1
[0047] Modification method of polyvinyl alcohol non-woven fabric according to figure 1 The process and method proceed:
[0048] The unmodified polyvinyl alcohol non-woven fabric 1 enters the preheating zone 2 to fully preheat the non-woven fabric; the preheated non-woven fabric enters the metering roller device 3 for double-sided roll coating of modifiers; Then enter the air flotation drying oven 4 for drying; the dried non-woven fabric is calendered (embossed) in the calendering (embossing) device 5; finally enters the double cooling roll 6 for cooling Shaping and winding to obtain the modified polyvinyl alcohol nonwoven fabric 7 .
[0049] The preheating zone in the modification process: includes three (pairs) preheating rollers; the metering roller device includes a modifier trough and a gravure metering coating roller.
[0050] In Example 1, the temperature of the triple (pair) heating rollers in the preheating zone 2 is controlled at 65 / 80 / 90°C; ℃ for drying; the tempe...
Embodiment 2
[0062] Modification method of polyvinyl alcohol non-woven fabric according to figure 1 The processes and methods are performed.
[0063] In Example 2, the grammage (GSM) of the polyvinyl alcohol nonwoven fabric 1 to be modified is: 100 grams / m 2 ; The amount of modifier used for coating is 30 g / m 2 ; The moisture content of the modified non-woven fabric is 4.66%; the calendering (embossing) roll temperature is 150°C.
[0064] Metering roll coating coating module 3 carries out the preparation of using modifying agent in the roll coating, by weight parts, comprises following component:
[0065]
[0066] After the above-mentioned components are measured separately, add to the dissolution container with a heating jacket, heat up to 98°C under stirring for 2 hours, mix and dissolve for 2 hours, then cool down to 90°C for 1 hour, then cool down and discharge at room temperature for later use. It is the modifying agent for the modified polyvinyl alcohol nonwoven fabric describe...
Embodiment 3
[0073] Modification method of polyvinyl alcohol non-woven fabric according to figure 1 The processes and methods are performed.
[0074] In Example 3, the grammage (GSM) of the polyvinyl alcohol nonwoven fabric 1 to be modified is: 20 grams / m 2 ; The dosage of modifier for coating is 10 g / m 2 ; The moisture content of the modified non-woven fabric is 3.01%; the calendering (embossing) roll temperature is 100°C.
[0075] Metering roll coating coating module 3 carries out the preparation of using modifying agent in the roll coating, by weight parts, comprises following component:
[0076]
[0077]
[0078]After the above-mentioned components were measured separately, they were added to a dissolution container with a heating jacket, and the temperature was raised to 96°C for 1.5 hours to mix and dissolve under stirring, then the temperature was lowered to 90°C and kept at a constant temperature for 1 hour, and then cooled to room temperature and discharged for later use. ...
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