Summary of the invention
The objective of the invention is provides a kind of polyolefin film hot melt separant at the problems referred to above, for the manufacture of the isolation of air inlet unit and outside base material in the wrapping material hot sealing process process; A kind of preparation and using method of this separant are provided simultaneously.
The present invention is achieved through the following technical solutions: polyolefin film hot melt separant is main raw material for 5~10 parts with 55~70 parts in calcium carbonate, talcum powder, interpolation serves as to calculate 1~2 part of 3~4 parts of 3~5 parts of 4~7 parts of silane coupling agents, promotor, properties-correcting agent, sequestrant, 5~7 parts of the tackifier of benchmark with calcium carbonate, talcum powder total amount, after fully mixing, under 70 ℃ ± 5 ℃ conditions of temperature, make thick product; At room temperature adding with thick product total amount serves as to calculate 30~50 parts of the ethyl acetate of benchmark, the liquid product of 15~25 parts of furnishing viscosity 5~8 centipoises of tackifier, density 2.1~2.5 grams/cubic centimetre.
Group component is parts by weight described in the scheme, and raw material calcium carbonate granularity wherein is selected from 850~1100 orders, is best with 1000 orders.
Talcum powder (hydrated magnesium silicate), molecular formula are Mg
3[Si
4O
10] (OH)
2Because it is good that talcum has oilness, anti-glutinous connection, opacifying power, crystal structure is stratiform, so have the trend that easily splits into scale and special slip, the effect of separant is exactly to stop between two aspect macromolecular chains of hot melt film to tangle mutually, because the talcum powder separability is good, poor adhesive force, separant applies the back and easily produces obscission, can not satisfy this product production engineering specifications, and this will remedy this respect deficiency by other combination of materials.
Silane coupling agent in the scheme is specially vinyl silanes, as vinyltrimethoxy silane, tetraethyl silicate also can use methacryloxy silane, as 3-glycidyl ether oxygen base propyl trimethoxy silicane, the 3-methacryloxypropyl trimethoxy silane substitutes.Silane coupling agent has bonding or crosslinked action, in this programme, be used for inorganic material bonding between the organic materials, by using silane coupling agent, can between the interface of inorganic substance and organic substance, erect " molecule bridge ", the material of two kinds of character great disparities is linked together.
Promotor is zinc oxide, because active zinc flower has good activation performance, can promote calcium carbonate, talcous surface activation, makes the different material component can fine mutual mixing, can substitute with magnesium oxide in addition.
Properties-correcting agent is stearic acid, and its effect is to improve calcium carbonate and talcum powder surfactivity, plays synergistic effect with promotor zinc oxide, and acidity value content is controlled between 205~211.
The sequestrant diethylene triamine pentacetic acid (DTPA), chelating value 253 ± 2mg/g, because sequestrant has the ring texture title complex, distinguishing feature is that affinity is good, Heat stability is good is easy to be dissolved in organic solvent, plays good mediation effect in the preparation of raw material process.Can be the ethylenediamine tetraacetic acid (EDTA) replacement of 339 ± 2mg/g with chelating value in addition.
Solvent is ethyl acetate, adopts ethyl acetate to make solvent, and its effect is product dissolving and the evenly dispersion that above-mentioned all material are produced, and also can use acetone to substitute.
Tackifier among the present invention are that the polymerization degree is 900~1100 polyisobutene, polyisobutene effect in the present invention is that the thick shape liquid product of making is evenly distributed on the coated film surface, can effectively improve the even distributed degrees of separant, realize suitability for industrialized production.
The concrete preparation method of separant:
A, calcium carbonate, talcum powder surface activation are handled: will place container by calcium carbonate, the talcum powder that formula ratio takes by weighing earlier, add the silane coupling agent that takes by weighing by calcium carbonate, talcum powder total amount during stirring heating temperature to 70 ± 5 ℃, after mixing, add the promotor, properties-correcting agent stearic acid, the sequestrant that take by weighing by calcium carbonate, talcum powder total amount under the uniform temp condition successively, fully stir the back and add polyisobutene, after fully stirring, making thick product, to be down to room temperature stand-by;
B, mediation: adding in above-mentioned thick product with thick product weight serves as to calculate the ethyl acetate of benchmark, adds polyisobutene again, and being modulated into kinematic viscosity is the liquid product of 5~8 centipoises, density 2.1~2.5 grams/cubic centimetre.
Using method provided by the invention is that the separant that modulates is coated to separant on the film surface that needs to isolate with mode of printing.
Adopt the positively effect of technique scheme: product isolation effect provided by the invention is good, coating evenly, even not glutinous by isolation aspect sealing coat under the elevated temperature heat pressure condition, under the synergy of promotor, properties-correcting agent, sequestrant and tackifier, the separant stable performance, low temperature (20 ℃) unchangeability, normal temperature storage is not decomposed.
Embodiment: the invention will be further described below in conjunction with accompanying drawing:
Embodiment 1
A, calcium carbonate, the talcum powder surface activation is handled: the 850 order calcium carbonate that will take by weighing by formula ratio are 70 parts earlier, talcum powder places container for 10 parts, add during stirring heating temperature to 70 ± 5 ℃ and press calcium carbonate, 6 parts of the silane coupling agent vinyl Trimethoxy silanes that the talcum powder total amount takes by weighing, after stirring 5 minutes abundant mixing, add successively under the uniform temp condition and press calcium carbonate, 4 parts in the promotor zinc oxide that the talcum powder total amount takes by weighing, 4 parts of properties-correcting agent stearic acid, 1.5 parts of sequestrant diethylene triamine pentacetic acid (DTPA)s, fully stir that to add the polymerization degree after 15 minutes be 15 parts of 900 polyisobutene, stir after 15 minutes, it is stand-by that the thick product of gained is down to room temperature;
B, mediation: adding in above-mentioned thick product with thick product weight serves as to calculate 30 parts of the ethyl acetate of benchmark, adding the polymerization degree again is 15 parts of 1100 polyisobutene, is modulated into the liquid product of viscosity 5 centipoises, density 2.5 grams/cubic centimetre after mixing.
Embodiment 2
A, calcium carbonate, the talcum powder surface activation is handled: the 1000 order calcium carbonate that will take by weighing by formula ratio are 58 parts earlier, talcum powder places container for 5 parts, add during stirring heating temperature to 70 ± 5 ℃ and press calcium carbonate, 5 parts of the silane coupling agent tetraethyl silicate that the talcum powder total amount takes by weighing, after stirring 10 minutes abundant mixing, add successively under the uniform temp condition and press calcium carbonate, 3.5 parts in the promotor magnesium oxide that the talcum powder total amount takes by weighing, 3.5 parts of properties-correcting agent stearic acid, 1 part of sequestrant diethylene triamine pentacetic acid (DTPA), fully stir that to add the polymerization degree after 15 minutes be 25 parts of 1100 polyisobutene, stir after 10-20 minute, it is stand-by that the thick product of gained is down to room temperature;
B, mediation: adding in above-mentioned thick product with thick product weight serves as to calculate 50 parts of the ethyl acetate of benchmark, adding the polymerization degree again is that 900 polyisobutene add-ons are 25 parts, is modulated into the liquid product of viscosity 8 centipoises, density 2.1 grams/cubic centimetre after mixing.
Embodiment 3
A, calcium carbonate, the talcum powder surface activation is handled: the 1000 order calcium carbonate that will take by weighing by formula ratio are 55 parts earlier, talcum powder places container for 7 parts, add during stirring heating temperature to 70 ± 5 ℃ and press calcium carbonate, 4 parts of the silane coupling agent vinyl Trimethoxy silanes that the talcum powder total amount takes by weighing, after stirring 10 minutes abundant mixing, add successively under the uniform temp condition and press calcium carbonate, 4.5 parts in the promotor zinc oxide that the talcum powder total amount takes by weighing, 3 parts of properties-correcting agent stearic acid, 2 parts of sequestrant ethylenediamine tetraacetic acid (EDTA)s, fully stir that to add the polymerization degree after 15 minutes be 23 parts of 900 polyisobutene tackifier, stir after 15 minutes, it is stand-by that the thick product of gained is down to room temperature;
B, mediation: adding in above-mentioned thick product with thick product weight serves as to calculate 40 parts of the ethyl acetate of benchmark, adding the polymerization degree again is that 1100 polyisobutene add-ons are 23 parts, is modulated into the liquid product of viscosity 7.5 centipoises, density 2.2 grams/cubic centimetre after mixing.
Embodiment 4
A, calcium carbonate, the talcum powder surface activation is handled: the 1100 order calcium carbonate that will take by weighing by formula ratio are 60 parts earlier, talcum powder places container for 6 parts, add during stirring heating temperature to 70 ± 5 ℃ and press calcium carbonate, 5 parts of the silane coupling agent tetraethyl silicate that the talcum powder total amount takes by weighing, after stirring 10 minutes abundant mixing, add successively under the uniform temp condition and press calcium carbonate, 5 parts in the promotor zinc oxide that the talcum powder total amount takes by weighing, 3.5 parts of properties-correcting agent stearic acid, 1 part of sequestrant ethylenediamine tetraacetic acid (EDTA), fully to add the polymerization degree after 15 minutes be 23 parts of 900 polyisobutene tackifier to stir about, stir after 10 minutes, it is stand-by that the thick product of gained is down to room temperature;
B, mediation: adding in above-mentioned thick product with thick product weight serves as to calculate 45 parts in the acetone of benchmark, adding the polymerization degree again is that 900 polyisobutene add-ons are 23 parts, is modulated into the liquid product of viscosity 7.5 centipoises, density 2.2 grams/cubic centimetre after mixing.
Embodiment 5
A, calcium carbonate, the talcum powder surface activation is handled: the 900 order calcium carbonate that will take by weighing by formula ratio are 65 parts earlier, talcum powder places container for 8 parts, add during stirring heating temperature to 70 ± 5 ℃ and press calcium carbonate, 6 parts of the silane coupling agent 3-glycidyl ether oxygen base propyl trimethoxy silicanes that the talcum powder total amount takes by weighing, after stirring 5 minutes abundant mixing, add successively under the uniform temp condition and press calcium carbonate, 3 parts in the promotor zinc oxide that the talcum powder total amount takes by weighing, 4 parts of properties-correcting agent stearic acid, 1.5 parts of sequestrant diethylene triamine pentacetic acid (DTPA)s, fully stir that to add the polymerization degree after 15 minutes be 20 parts of 900 polyisobutene, stir after 15 minutes, it is stand-by that the thick product of gained is down to room temperature;
B, mediation: adding in above-mentioned thick product with thick product weight serves as to calculate 45 parts of the ethyl acetate of benchmark, adding the polymerization degree again is 20 parts of 900 polyisobutene, is modulated into the liquid product of viscosity 5.6 centipoises, density 2.3 grams/cubic centimetre after mixing.
Embodiment 6
A, calcium carbonate, the talcum powder surface activation is handled: the 1000 order calcium carbonate that will take by weighing by formula ratio are 68 parts earlier, talcum powder places container for 9 parts, add during stirring heating temperature to 70 ± 5 ℃ and press calcium carbonate, 7 parts of the silane coupling agent 3-methacryloxypropyl trimethoxy silane that the talcum powder total amount takes by weighing, after stirring 5 minutes abundant mixing, add successively under the uniform temp condition and press calcium carbonate, 4 parts in the promotor magnesium oxide that the talcum powder total amount takes by weighing, 4 parts of properties-correcting agent stearic acid, 1.5 parts of sequestrant ethylenediamine tetraacetic acid (EDTA)s, fully stir that to add the polymerization degree after 15 minutes be 18 parts of 900 polyisobutene, stir after 15 minutes, it is stand-by that the thick product of gained is down to room temperature;
B, mediation: adding in above-mentioned thick product with thick product weight serves as to calculate 35 parts in the acetone of benchmark, adding the polymerization degree again is 18 parts of 1100 polyisobutene, is modulated into the liquid product of viscosity 5.5 centipoises, density 2.4 grams/cubic centimetre after mixing.