Foam adhesive tape and preparation method thereof
A technology of cotton tape and tape, applied in the direction of adhesives, adhesive types, film/sheet adhesives, etc., can solve the problems that are not suitable for the automotive field, achieve excellent wettability, high initial adhesion, and avoid The effect of atomization
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[0042] The preparation method of the foam tape provided by the present invention includes scraping a foaming layer on the hot melt layer, then scraping a pressure-sensitive adhesive layer, and then coating a protective layer. Or it includes scraping a foaming layer on the hot melt adhesive, scraping a pressure-sensitive adhesive layer on the protective layer, and then bonding the two parts together. Taking the foam tape with the first transition layer and the second transition layer as an example, it specifically includes the following steps:
[0043] Provide a hot melt layer, and scrape or roll coat the first transition layer on the hot melt layer;
[0044] Then a foam layer is scraped on the first transition layer, and then the second transition layer is scraped or rolled; the foam layer is preferably foamed by a foaming machine, and the foam ratio of the foam is 180% -200%;
[0045] Provide a protective layer, and scrape a pressure-sensitive adhesive layer on the protective laye...
Embodiment 1
[0049] figure 2 It is a flow chart of the preparation process of the foam tape in the embodiment of the present invention.
[0050] See figure 2 The preparation method of the foam tape provided by the present invention is as follows:
[0051] Step S1, the TPV film 1 is subjected to polyurethane affinity treatment, the TPV film 1 is subjected to corona treatment with a voltage of 300V; the one-component polyurethane glue produced by the applicant is coated on the TPV with a coating amount of 100 g / m2 On the film, the one-component polyurethane glue is prepared by referring to the method disclosed in the invention patent filed by the applicant with a patent number of 201110381253.4. The coated one-component polyurethane glue is the adhesive layer 2; Drying at a temperature of ℃, the drying time is 8 minutes.
[0052] Step S2: Add 10%-30% of the anti-hydrolysis component and 1%-2% of the foam regulator to the waterborne polyurethane emulsion to form a polyurethane mixture; mix the ...
Embodiment 2
[0058] Step S1, the TPV film 1 is subjected to polyurethane affinity treatment, and the TPV film 1 is corona treated with a voltage of 500V; the one-component polyurethane glue produced by the applicant is coated on the TPV with a coating amount of 200 g / m2 On the film, the one-component polyurethane glue is prepared by referring to the method disclosed in the invention patent filed by the applicant with a patent number of 201110381253.4. The coated one-component polyurethane glue is the adhesive layer 2; Drying at a temperature of -120℃, the drying time is 8 minutes.
[0059] Step S2: Add 10%-30% of the anti-hydrolysis component and 1%-2% of the foam regulator to the waterborne polyurethane emulsion to form a polyurethane mixture; mix the hydrolysis-resistant component, foam regulator, and color paste in At the same time, stir with a mixer at low speed, and adjust the solution to a predetermined viscosity with a viscosity modifier.
[0060] In step S3, the PE film is released in ...
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