CN104374900B - PP film ageing-resistant performance method of testing - Google Patents
PP film ageing-resistant performance method of testing Download PDFInfo
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- CN104374900B CN104374900B CN201410657655.6A CN201410657655A CN104374900B CN 104374900 B CN104374900 B CN 104374900B CN 201410657655 A CN201410657655 A CN 201410657655A CN 104374900 B CN104374900 B CN 104374900B
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Abstract
The invention discloses a kind of PP film ageing-resistant performance method of testing, comprise the steps: step 1: by smooth for copper rod surface finish, and wiped clean; Step 2: by PP film slitting uniformly rectangular sample, and be wrapped on copper rod; Step 3: toasted under the constant temperature of 80-200 DEG C by the copper rod being wound with sample, observes the situation of a film surface at set intervals, and records the visual condition of film, when efflorescence appears in film surface, be the ageing-resistant time of film.The present invention also discloses a kind of proving installation.The present invention has the advantage that can detect PP film simply, accurately and quickly.
Description
Technical field
The present invention relates to detection method, especially relate to a kind of PP film ageing-resistant performance method of testing that can detect PP film accurately and quickly.
Background technology
Polypropylene, english abbreviation PP, dropped into since suitability for industrialized production to nineteen fifty-seven, became one of important plastics variety with the performance of its excellence.Pp material abundance, cheap, the physical strength of its excellence and processing characteristics are widely used in the every field such as automobile, electrical equipment, commodity and furniture packaging.PP has good thermotolerance, is in hot environment for a long time, and molecular structure also can not be destroyed.PP belongs to non-polar polymer, has excellent dielectricity and electrical insulating property, and electrical property is not subject to the impact of ambient humidity and electric field frequency substantially.The chemical resistance of PP is good in addition, except strong oxidizer has erosion action to it, other reagent to it all without acting on.Based on above advantage, since the nineties in last century lithium ion battery suitability for industrialized production, just as one of the primary raw material of lithium ion battery separator, be widely used.
But the effect of PP to oxygen is more responsive, particularly when temperature is higher.Simultaneously its ultraviolet-resistant capacity is very poor, is also subject to the destruction of high-energy radiation, and when being subject to above-mentioned destruction, it all can be degraded generation lower-molecular substance, occurs aging.When PP occurs aging, its mechanical property can reduce, even can efflorescence time serious, if can not get rid of in time, will bring irreversible loss or potential safety hazard.Therefore a lot of occasions used at PP all propose certain requirement to its heat oxygen aging resistance ability, but but do not have a kind of can test for the ageing-resistant performance of PP film by convenient and swift parallel effective method.
Summary of the invention
For overcoming above-mentioned shortcoming, provide a kind of ageing-resistant performance that can detect PP film accurately and quickly, for the PP film ageing-resistant performance method of testing providing foundation when PP film is selected by producer.
The object of the invention is to be realized by following technical measures, a kind of PP film ageing-resistant performance method of testing, comprises the steps:
Step 1: by smooth for copper rod surface finish, and wiped clean;
Step 2: by PP film slitting uniformly rectangular sample, and be wrapped on copper rod;
Step 3: toasted under the constant temperature of 80-200 DEG C by the copper rod being wound with sample, observes the situation of a film surface at set intervals, and records the visual condition of film, when efflorescence appears in film surface, be the ageing-resistant time of film.
As a kind of optimal way, the thickness of described PP film is between 5um ~ 100um.
As a kind of optimal way, the square section of described copper rod is circular.
As a kind of optimal way, when copper rod of polishing is surperficial, guarantee the oxide of copper rod surface noresidue in described step 1.
As a kind of optimal way, by two kinds of different PP film slitting uniformly rectangular samples in described step 2, be wrapped in two ends of copper rod respectively, the afterbody high temperature gummed tape of rectangular sample is fixed.
As a kind of optimal way, the interlude observed in described step 3 is half an hour.
As a kind of optimal way, the baking in described step 3 is carried out in blowing-type baking box.
The present invention improves the experimental situation temperature of PP film, and under the effect of copper, can effectively accelerate the aging of barrier film, reduces test required time, can detect fast the ageing properties of barrier film and contrast.The present invention is easy and simple to handle, equipment is simple, testing staff can independent operation, detect reproducible, testing efficiency is high, compared with the ageing-resistant performance of the test PP film of accurate quick, can be applicable to the testing process of the PP membraneous material of various different size, applied range, for screening PP film provides foundation accurately.
Embodiment
Below the present invention is described in further detail.
A kind of PP film ageing-resistant performance method of testing, comprises the steps:
Step 1: by smooth for copper rod surface finish, and wiped clean;
Step 2: by PP film slitting uniformly rectangular sample, and be wrapped on copper rod;
Step 3: toasted under the constant temperature of 80-200 DEG C by the copper rod being wound with sample, observes the situation of a film surface at set intervals, and records the visual condition of film, when efflorescence appears in film surface, be the ageing-resistant time of film.
This method improves the experimental situation temperature of PP film, and under the effect of copper, can effectively accelerate the aging of barrier film, reduces test required time, can detect fast the ageing properties of barrier film and contrast.This method is easy and simple to handle, equipment is simple, testing staff can independent operation, detect reproducible, testing efficiency is high, compared with the ageing-resistant performance of the test PP film of accurate quick, can be applicable to the testing process of the PP membraneous material of various different size, applied range, for screening PP film provides foundation accurately.
PP film ageing-resistant performance method of testing of the present invention, on the basis of previous technique scheme, the thickness of PP film is between 5um ~ 100um.
PP film ageing-resistant performance method of testing of the present invention, on the basis of previous technique scheme, the square section of copper rod is circular.In test process, film is heated and shrinks, and therefore copper rod should be circular, ensures that the accuracy result of unbalance stress to test does not impact because of the corner angle of copper rod in all positions of experimentation septation.
PP film ageing-resistant performance method of testing of the present invention, because copper oxidation reaction can occur in atmosphere, generates oxide and is attached to copper rod surface, on the basis of previous technique scheme, guarantees the oxide of copper rod surface noresidue in step 1 when copper rod of polishing is surperficial.
PP film ageing-resistant performance method of testing of the present invention, in order to carry out the contrast of two kinds of different PP films, on the basis of previous technique scheme, by two kinds of different PP film slitting uniformly rectangular samples in step 2, be wrapped in two ends of copper rod respectively, the afterbody high temperature gummed tape of rectangular sample is fixed.
PP film ageing-resistant performance method of testing of the present invention, on the basis of previous technique scheme, the interlude observed in step 3 is half an hour.
PP film ageing-resistant performance method of testing of the present invention, on the basis of previous technique scheme, the baking in step 3 is carried out in blowing-type baking box.
Below in conjunction with specific embodiment and comparative example, such scheme is described further.Should be understood that these embodiments are for illustration of the present invention, be not limited to limit the scope of the invention.
Formula 1
A kind of anti-oxidant acrylic plastering, described anti-aging polypropylene alkene plastics is made up of the feed composition of following weight portion: polypropylene 100 parts, anti-oxidant DLTP 0.5 part, epoxy resin 14 parts, spreading agent 0.4 part, coupling agent 0.7 part.
Superhigh speed mixing machine is put in above-mentioned raw materials mixing mix, control rotating speed at 300-400 rev/min.Mixed thing is melt extruded granulation through twin-screw mixer equipment, controls barrel zone temperature at 200-220 DEG C.Anti-oxidant pp material is obtained after cooling.
Granulation gained pp material is joined in curtain coating extrusion system and carries out slab, be prepared into casting films.The casting films prepared is put into constant temperature oven and toasts 5h, oven temperature is stabilized in 140 DEG C.
After thermal treatment completes, casting films film is carried out longitudinal stretching, draw ratio controls 1.8, is prepared into the film A with microcellular structure.
Formula 2
A kind of anti-oxidant acrylic plastering, described anti-aging polypropylene alkene plastics is made up of the feed composition of following weight portion: polypropylene 100 parts, anti-oxidant DLTP 0.2 part, epoxy resin 14 parts, spreading agent 0.4 part, coupling agent 0.7 part.
According to the preparation method in formula 1, the raw material of above-mentioned formula is carried out mixing granulation, and finally make microporous membrane B.
Embodiment
Become 40mm wide with obtained film slitting in formula 2 obtained for formula 1, the sample that 600mm is long, and be numbered A and B respectively.
By the copper rod sand paper of a diameter 10mm, long 300mm that surface finish is smooth, wash away the impurity on surface with water, and use non-dust cloth wiped clean.
By A, B two samples, be wrapped in copper rod both sides respectively, a small amount of high temperature gummed tape of afterbody is fixed, so that film can be wrapped on copper rod closely.
Copper rod after winding sample is put into the blowing-type baking box of 120 DEG C, observe the change of a film surface situation every half an hour, until surface occurs brittle, be the digestion time of film.
The digestion time of table 1 film
| Numbering | Brittle time (h) |
| A | 17.0 |
| B | 10.5 |
From table 1, we can judge that the ageing-resistant performance of A film sample is better than the ageing-resistant performance of B film sample, confirm mutually higher than the result of antioxidant content in B sample with antioxidant content in A sample.
More than that PP film ageing-resistant performance method of testing of the present invention is set forth; the present invention is understood for helping; but embodiments of the present invention are not restricted to the described embodiments; any do not deviate from the principle of the invention under do change, modification, substitute, combination, simplify; all should be the substitute mode of equivalence, be included within protection scope of the present invention.
Claims (7)
1. a PP film ageing-resistant performance method of testing, is characterized in that comprising the steps:
Step 1: by smooth for copper rod surface finish, and wiped clean;
Step 2: by PP film slitting uniformly rectangular sample, and be wrapped on copper rod;
Step 3: toasted under the constant temperature of 80-200 DEG C by the copper rod being wound with sample, observes the situation of a film surface at set intervals, and records the visual condition of film, when efflorescence appears in film surface, be the ageing-resistant time of film.
2. PP film ageing-resistant performance method of testing according to claim 1, is characterized in that: the thickness of described PP film is between 5um ~ 100um.
3. PP film ageing-resistant performance method of testing according to claim 1, is characterized in that: the square section of described copper rod is for circular.
4. PP film ageing-resistant performance method of testing according to claim 1, is characterized in that: the oxide guaranteeing copper rod surface noresidue when copper rod of polishing in described step 1 is surperficial.
5. PP film ageing-resistant performance method of testing according to claim 1, is characterized in that: by two kinds of different PP film slitting uniformly rectangular samples in described step 2, be wrapped in two ends of copper rod respectively, the afterbody high temperature gummed tape of rectangular sample is fixed.
6. PP film ageing-resistant performance method of testing according to claim 1, is characterized in that: the interlude observed in described step 3 is half an hour.
7. PP film ageing-resistant performance method of testing according to claim 1, is characterized in that: the baking in described step 3 is carried out in blowing-type baking box.
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| CN201410657655.6A CN104374900B (en) | 2014-11-17 | 2014-11-17 | PP film ageing-resistant performance method of testing |
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| CN201410657655.6A CN104374900B (en) | 2014-11-17 | 2014-11-17 | PP film ageing-resistant performance method of testing |
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| CN104374900B true CN104374900B (en) | 2016-02-24 |
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| CN108693027A (en) * | 2018-03-30 | 2018-10-23 | 康维明工程薄膜（张家港）有限公司 | A kind of high pressure-temperature high humidity acceleration boiling film sample test method |
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