A kind of preparation method of polyvinyl alcohol stretch film
A technology of polyvinyl alcohol and stretch film, applied in the field of packaging materials, can solve the problems of low tensile strength and elongation at break, poor viscosity, etc., and achieve the effects of improving mechanical properties, increasing adhesive force, and increasing tensile strength
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[0025] A kind of preparation method of polyvinyl alcohol stretch film, this preparation method comprises the steps:
[0026] (1) Heat the rosin ester to 140~160°C, melt for 4~5 minutes, lower the temperature to 60~70°C, add an emulsifier with 3~5% mass of rosin ester, stir evenly, pour the same mass of rosin ester In water at 60-70°C, stir at 800-900r / min for 15-20min, homogenize twice through a high-pressure homogenizing pump, cool to room temperature, filter through a 200-mesh sieve to obtain an emulsion, and set aside;
[0027] (2) In parts by weight, take 10~13 parts of acetone, 7~8 parts of titanium dioxide, 2~3 parts of silane coupling agent, 1~2 parts of titanate coupling agent, and mix silane coupling agent, titanic acid Mix the ester coupling agent and acetone, stir evenly, add titanium dioxide, stir for 8-10min, ultrasonic for 0.8-1h, dry at 70-80°C for 20-24h, grind, pass through a 200-300 mesh sieve to obtain the sieved product ;
[0028] (3) Grind the green tea,...
Embodiment 1
[0033] The emulsifier is alkylphenol ethoxylate.
[0034] The silane coupling agent is γ-aminopropyltriethoxysilane.
[0035] The titanate coupling agent is isopropyl tris(isostearyl) titanate.
[0036] The composite agent is obtained by mixing ammonium polyphosphate and pentaerythritol in a mass ratio of 20:9.
[0037] A kind of preparation method of polyvinyl alcohol stretch film, this preparation method comprises the steps:
[0038] (1) Heat the rosin ester to 140°C, melt for 4 minutes, lower the temperature to 60°C, add an emulsifier with 3% mass of the rosin ester, stir evenly, pour the same mass of rosin ester into water at a temperature of 60°C, and heat at 800r / min and stir for 15 minutes, homogenize twice through a high-pressure homogenizing pump, wait to cool to room temperature, filter with a 200-mesh sieve to obtain an emulsion, and set aside;
[0039] (2) In parts by weight, take 10 parts of acetone, 7 parts of titanium dioxide, 2 parts of silane coupling agen...
Embodiment 2
[0045] The emulsifier is alkylphenol ethoxylate.
[0046] The silane coupling agent is γ-aminopropyltriethoxysilane.
[0047] The titanate coupling agent is isopropyl tris(isostearyl) titanate.
[0048] The composite agent is obtained by mixing ammonium polyphosphate and pentaerythritol in a mass ratio of 20:9.
[0049] A kind of preparation method of polyvinyl alcohol stretch film, this preparation method comprises the steps:
[0050] (1) Heat the rosin ester to 160°C, melt for 5 minutes, lower the temperature to 70°C, add an emulsifier with 5% mass of the rosin ester, stir evenly, pour the same mass of rosin ester into water at a temperature of 70°C, and use 900r / min and stir for 20 minutes, homogenize twice through a high-pressure homogenizing pump, cool to room temperature, filter through a 200-mesh sieve to obtain an emulsion, and set aside;
[0051] (2) In parts by weight, take 13 parts of acetone, 8 parts of titanium dioxide, 3 parts of silane coupling agent, and 2 ...
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