CN108752622B - A kind of foamed products and preparation method thereof replacing foaming agent with air - Google Patents
A kind of foamed products and preparation method thereof replacing foaming agent with air Download PDFInfo
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- CN108752622B CN108752622B CN201810521721.5A CN201810521721A CN108752622B CN 108752622 B CN108752622 B CN 108752622B CN 201810521721 A CN201810521721 A CN 201810521721A CN 108752622 B CN108752622 B CN 108752622B
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Abstract
The present invention relates to a kind of foamed products and preparation method thereof for replacing foaming agent with air, belong to Material Field.Preparation method is the following steps are included: foaming material pending is placed in air foaming mould, and the pressure being passed through under conditions of 135-145 DEG C into air foaming mould in air to air foaming mould is 11.5-13MPa, is foamed, and pressure releasing die sinking obtains foamed products.Above-mentioned preparation method is simple, and process is easily-controllable, without foaming agent is used, directly replaces foaming agent, safety and environmental protection with air.The foamed products being prepared are non-toxic and tasteless, and use is safe, and performance is preferable.
Description
Technical field
The present invention relates to Material Fields, and in particular to a kind of air replaces foamed products and its preparation side of foaming agent
Method.
Background technique
The Plastic Rubber Products come out with foaming agent foam nearly all at present have different degrees of bad smell or formamide
Exceeded problem exists.And some foaming agents (sodium bicarbonate) can generate a large amount of carbon dioxide, foaming agent itself after disassembly
There are problems that environmental pollution during production.
Summary of the invention
One of the objects of the present invention is to provide a kind of preparation method of foamed products for replacing foaming agent with air, the systems
Preparation Method is simple, and process is easily-controllable, without foaming agent is used, directly replaces foaming agent, safety and environmental protection with air.
The second object of the present invention, which is to provide, a kind of replaces foaming agent with air by what above-mentioned preparation method was prepared
Foamed products, the foamed products are non-toxic and tasteless, and use is safe, and performance is preferable.
The present invention solves its technical problem and adopts the following technical solutions to realize:
The present invention proposes a kind of preparation method of foamed products for replacing foaming agent with air, comprising the following steps: will be to
Foamed material is placed in air foaming mould, is passed through air to air into air foaming mould under conditions of 135-145 DEG C and is foamed
Pressure in mould is 11.5-13MPa, is foamed, and pressure releasing die sinking obtains foamed products.
Preferably, the pressure being passed through in air to air foaming mould under conditions of 140 DEG C into air foaming mould is
12MPa。
The present invention also proposes a kind of foamed products for replacing foaming agent with air, is prepared by above-mentioned preparation method.
The beneficial effect with the foamed products of air substitution foaming agent and preparation method thereof that present pre-ferred embodiments provide
Fruit includes:
The preparation method for the foamed products with air substitution foaming agent that present pre-ferred embodiments provide is by using sky
Gas replaces foaming agent in the prior art, and the reticular structure of plastic cement or rubber is supportted to big modeling to reach foaming effect, after foaming
Glue or rubber are expanded in appropriate range.Through above-mentioned air foam forms, it on the one hand can be avoided and send out in the prior art
Great amount of carbon dioxide is generated after infusion foaming, pollutes environment, foamed products on the other hand can be made not have bad smell, formamide
Content is qualified, non-toxic and tasteless and equally have preferable mechanical property.The foamed products being prepared by this method are non-toxic and tasteless,
Using safe, performance is preferable.
Specific embodiment
It in order to make the object, technical scheme and advantages of the embodiment of the invention clearer, below will be in the embodiment of the present invention
Technical solution be clearly and completely described.The person that is not specified actual conditions in embodiment, according to normal conditions or manufacturer builds
The condition of view carries out.Reagents or instruments used without specified manufacturer is the conventional production that can be obtained by commercially available purchase
Product.
The foamed products and preparation method thereof of foaming agent are replaced to carry out specifically with air the embodiment of the present invention below
It is bright.
The preparation method of the foamed products provided in an embodiment of the present invention for replacing foaming agent with air will be the following steps are included: will
In foaming material merging air foaming mould pending, air to air is passed through into air foaming mould under conditions of 135-145 DEG C and is sent out
Steeping the pressure in mould is 11.5-13MPa, is foamed, and pressure releasing die sinking obtains foamed products.
Preferably, the pressure being passed through in air to air foaming mould under conditions of 140 DEG C into air foaming mould is
12MPa.Above-mentioned temperature and pressure matching requirements further aspect are conducive to improve foam performance, improve the quantity of small-bore abscess,
Foamed products surface layer and internal thickness proportion are balanced, to obtain preferable mechanical property；On the other hand can reduce flash and
Stress extends die life.
Air foaming mould is lockked with sealing device in foaming process.It can refer to, sealing device may include hydraulic press.It is logical
It crosses after being passed through air to specified pressure into air foaming mould, and under the conditions of the locking of hydraulic press, air can be made to be formed super
Critical state is injected after die cavity under the action of gas diffusion internal pressure, and making foamed products intermediate distribution having a size of ten, a few to tens of are micro-
The closed porosity foaming of rice.
It can refer to ground, foamed time presses the thickness gauge of foamed products in the embodiment of the present invention, and the target of every 1mm thickness, which foams, to be produced
The foamed time of product is 8-12min.Preferably, the foamed time of the target foamed products of every 1mm thickness is 10min.By with mesh
The thickness of foamed products is marked to determine foamed time, specific aim setting can be carried out to different foamed products.Also, according to above-mentioned hair
The bubble time, which can effectively avoid Material shrinkage in foaming process in the prior art, causes foaming product surface to occur shrinking trace, vortex line
Or phenomena such as pit.
It is worth noting that the too short foaming effect that will cause of foamed time is poor, foam phenomena such as incomplete, and foamed time
It will lead to appearance and the possibility steeped after too long, reduce foaming effect instead.
Foaming agent in the prior art is replaced by using air in the embodiment of the present invention, by plastic cement or the netted knot of rubber
Structure support is big, and to reach foaming effect, plastic cement or rubber after foaming are expanded in appropriate range.It foams through above-mentioned air
Form generates great amount of carbon dioxide after on the one hand can be avoided foaming agent foam in the prior art, pollutes environment, another aspect energy
Foamed products are made not have bad smell, formamide content is qualified, non-toxic and tasteless and equally have preferable mechanical property.
It can refer to ground, the foaming material pending in the embodiment of the present invention can be obtained through following steps: mixed raw material, in mixer
Middle mixing, slice or granulation, obtain initial material；Vulcanization or crosslinking initial material, it is cooling, obtain foaming material pending.
Raw material includes at least one of the raw material of rubber and the raw material of plastic cement.
For example, raw material may include:
1, the EVA (ethylene-vinyl acetate copolymer) of 90-110 parts by weight, 20-40 parts by weight calcium carbonate and 0.8-
BIPB (dual-tert-butyl dicumyl peroxide) crosslinking agent of 1.2 parts by weight.Preferably, can be 100 parts by weight EVA,
The BIPB crosslinking agent of the calcium carbonate of 30 parts by weight and 1 parts by weight.
2, the BIPB of the PE (polyethylene) of 90-110 parts by weight, the calcium carbonate of 20-40 parts by weight and 0.8-1.2 parts by weight are handed over
Join agent.Preferably, the BIPB crosslinking agent of the PE of 100 parts by weight, the calcium carbonate of 30 parts by weight and 1 parts by weight be can be.
3, the calcium carbonate and 0.8-1.2 parts by weight of PE, 20-40 parts by weight of EVA, 40-60 parts by weight of 40-60 parts by weight
BIPB crosslinking agent.Preferably, the EVA of 50 parts by weight, the PE of 50 parts by weight, the calcium carbonate of 30 parts by weight and 1 weight be can be
The BIPB crosslinking agent of part.
4, the SBR-1502 (butadiene-styrene rubber 1502) of 20-40 parts by weight, 40-60 parts by weight NR-3L (natural rubber-
3L), the EPDM (ethylene propylene diene rubber), the calcium carbonate of 40-60 parts by weight of 15-25 parts by weight, 15-25 parts by weight carclazyte,
The stearic acid of 0.8-1.2 parts by weight, the zinc oxide of 1.5-2.5 parts by weight, 0.2-0.4 parts by weight M, 0.8-1.2 parts by weight
The DOP (dioctyl phthalate) of DM, 40-60 parts by weight and S of 1.8-2.2 parts by weight.
Preferably, the SBR-1502 of 30 parts by weight, the NR-3L of 50 parts by weight, the EPDM of 20 parts by weight, 50 weight be can be
Calcium carbonate, the carclazyte of 20 parts by weight, the stearic acid of 1 parts by weight, the zinc oxide of 2 parts by weight, the M of 0.3 parts by weight, 1 weight of part
The DM, the DOP of 50 parts by weight and the S of 2 parts by weight of part.
By said ratio mixed raw material, it is kneaded in mixer so that each raw material is uniformly mixed, obtains mixing glue.It can refer to
Ground, temperature control for example can be at 80-100 DEG C, under the temperature range in mixing process, and the invasion that sizing material is not easily susceptible to oxygen generate
Chain rupture, to be conducive to make sizing material that there is preferable breaking strength.
Slice or granulation, obtain initial material after mixing.Above-mentioned initial material is vulcanized or is crosslinked, for example, can in vulcanizer into
Row.It is worth noting that vulcanization and crosslinking are substantially identical in the embodiment of the present invention, sulphur is mainly referred to as in the preparation of rubber raw materials
Change, it is corresponding, mainly it is referred to as in the preparation of plastic material and is crosslinked.By the step, pass through the macromolecule in foaming material pending
Crosslinking or sulfurization form tridimensional network, so that foaming material pending has certain intensity and elasticity, it is wear-resisting to improve its
Property and anti-swelling.
Optionally, the temperature for vulcanizing or being crosslinked can be 150-170 DEG C.Preferably, vulcanize or the temperature of crosslinking is
160℃.Above-mentioned vulcanization or crosslinking temperature can make foaming material pending have the cross-linked structure for being suitable for air foaming.Vulcanization is handed over
It is excessively high to join temperature, after especially more than 180 DEG C, rubber or plastic cement strand can be caused to crack, reduce the mechanical property of sizing material,
Secondary, when material thickness to be foamed is thicker, excessively high crosslinking or curing temperature can also make the material inside and outside temperature difference to be foamed larger, sulphur
Change or crosslinking is uneven.Conversely, vulcanization or crosslinking temperature are too low, at especially less than 140 DEG C, it will cause vulcanization or crosslinking do not filled
Point, tridimensional network is insecure in foaming material pending.
Preferably, the time of vulcanization or crosslinking in the embodiment of the present invention presses the thickness gauge of required foaming material pending, often
The time of vulcanization or the crosslinking of the foaming material pending of 10mm thickness is 10-15min.Vulcanization or crosslinking time are set according to thickness,
Targetedly it can be vulcanized or be crosslinked according to different foaming materials pending, so that different foaming materials pending all has preferably
Structure and performance with air foaming process to match.
It further, further include cooling after vulcanizing or be crosslinked.It is cooling to be mainly cooled to room temperature foaming material pending, such as
10-30℃.Cooling time can be controlled in 20-26h.By cooling, can avoid causing due to cooling deficiency in air foaming process
It is middle that there is a situation where gases to burst.
Further, by foaming material merging air foaming foam-in-mould pending after cooling.
The foamed products being prepared through preparation method provided in an embodiment of the present invention can be applied to footwear material, sports goods,
The fields such as automobile, rail traffic, electronics or space flight and aviation.
Feature and performance of the invention are described in further detail with reference to embodiments.
Embodiment 1
Mixed raw material is kneaded in mixer with 80 DEG C of temperature, and then slice or granulation, obtain initial material.In 150 DEG C
Under conditions of vulcanize or crosslinking initial material, vulcanization or crosslinking time press the thickness gauge of required foaming material pending, every 10mm it is thick to
The time of vulcanization or the crosslinking of foamed material is 10min.Then 20h is cooled down to room temperature, obtains foaming material pending.
Wherein, raw material contains the BIPB crosslinking agent of the EVA of 90 parts by weight, the calcium carbonate of 20 parts by weight and 0.8 parts by weight.
Foaming material pending is placed in air foaming mould, is passed through air extremely into air foaming mould under conditions of 135 DEG C
Pressure in air foaming mould is 11.5MPa, foaming.Foamed time presses the thickness gauge of required foamed products, the hair of every 1mm thickness
The foamed time for steeping product is 8min.After the completion of foaming, pressure releasing die sinking, handy air replaces the foamed products of foaming agent.
Embodiment 2
Mixed raw material is kneaded in mixer with 100 DEG C of temperature, and then slice or granulation, obtain initial material.In 170
Vulcanize or be crosslinked initial material under conditions of DEG C, vulcanization or crosslinking time press the thickness gauge of required foaming material pending, every 10mm thickness
The time of vulcanization or the crosslinking of foaming material pending is 15min.Then 26h is cooled down to room temperature, obtains foaming material pending.
Wherein, raw material contains the BIPB crosslinking agent of the EVA of 110 parts by weight, the calcium carbonate of 40 parts by weight and 1.2 parts by weight.
Foaming material pending is placed in air foaming mould, is passed through air extremely into air foaming mould under conditions of 145 DEG C
Pressure in air foaming mould is 13MPa, foaming.Foamed time presses the thickness gauge of required foamed products, thick required of every 1mm
The foamed time of foamed products is 12min.After the completion of foaming, pressure releasing die sinking, handy air replaces the foamed products of foaming agent.
Embodiment 3
Mixed raw material is kneaded in mixer with 90 DEG C of temperature, and then slice or granulation, obtain initial material.In 160 DEG C
Under conditions of vulcanize or crosslinking initial material, vulcanization or crosslinking time press the thickness gauge of required foaming material pending, every 10mm it is thick to
The time of vulcanization or the crosslinking of foamed material is 12.5min.Then it cools down for 24 hours to room temperature, obtains foaming material pending.
Wherein, raw material contains the BIPB crosslinking agent of the EVA of 100 parts by weight, the calcium carbonate of 30 parts by weight and 1 parts by weight.
Foaming material pending is placed in air foaming mould, is passed through air extremely into air foaming mould under conditions of 140 DEG C
Pressure in air foaming mould is 12MPa, foaming.Foamed time presses the thickness gauge of required foamed products, thick required of every 1mm
The foamed time of foamed products is 10min.After the completion of foaming, pressure releasing die sinking, handy air replaces the foamed products of foaming agent.
Embodiment 4
The present embodiment the difference from embodiment 1 is that:
Raw material contains the BIPB crosslinking agent of the PE of 90 parts by weight, the calcium carbonate of 20 parts by weight and 0.8 parts by weight.
Embodiment 5
The present embodiment the difference from embodiment 1 is that:
Raw material contains the BIPB of the EVA of 40 parts by weight, the PE of 40 parts by weight, the calcium carbonate of 20 parts by weight and 0.8 parts by weight
Crosslinking agent.
Embodiment 6
The present embodiment the difference from embodiment 1 is that:
Raw material contains the SBR-1502 of 20 parts by weight, the NR-3L of 40 parts by weight, the EPDM of 15 parts by weight, 40 parts by weight
Calcium carbonate, the carclazyte of 15 parts by weight, the stearic acid of 0.8 parts by weight, the zinc oxide of 1.5 parts by weight, the M of 0.2 parts by weight, 0.8 weight
Measure the DM, the DOP of 40 parts by weight and the S of 1.8 parts by weight of part.
Embodiment 7
The present embodiment the difference from example 2 is that:
Raw material contains the BIPB crosslinking agent of the PE of 110 parts by weight, the calcium carbonate of 40 parts by weight and 1.2 parts by weight.
Embodiment 8
The present embodiment the difference from example 2 is that:
Raw material contains the BIPB of the EVA of 60 parts by weight, the PE of 60 parts by weight, the calcium carbonate of 40 parts by weight and 1.2 parts by weight
Crosslinking agent.
Embodiment 9
The present embodiment the difference from example 2 is that:
Raw material contains the SBR-1502 of 40 parts by weight, the NR-3L of 60 parts by weight, the EPDM of 25 parts by weight, 60 parts by weight
Calcium carbonate, the carclazyte of 25 parts by weight, the stearic acid of 1.2 parts by weight, the zinc oxide of 2.5 parts by weight, the M of 0.4 parts by weight, 1.2 weights
Measure the DM, the DOP of 60 parts by weight and the S of 2.2 parts by weight of part.
Embodiment 10
The present embodiment and the difference of embodiment 3 are:
Raw material contains the BIPB crosslinking agent of the PE of 100 parts by weight, the calcium carbonate of 30 parts by weight and 1 parts by weight.
Embodiment 11
The present embodiment and the difference of embodiment 3 are:
The BIPB that raw material contains the EVA of 50 parts by weight, the PE of 50 parts by weight, the calcium carbonate of 30 parts by weight and 1 parts by weight is handed over
Join agent.
Embodiment 12
The present embodiment and the difference of embodiment 3 are:
Raw material contains the SBR-1502 of 30 parts by weight, the NR-3L of 50 parts by weight, the EPDM of 20 parts by weight, 50 parts by weight
Calcium carbonate, the carclazyte of 20 parts by weight, the stearic acid of 1 parts by weight, the zinc oxide of 2 parts by weight, the M of 0.3 parts by weight, 1 parts by weight
The S of DM, the DOP of 50 parts by weight and 2 parts by weight.
Test example
It repeats to implement above-described embodiment 1-12, obtains enough foamed products for replacing foaming agent with air.
By taking embodiment 3, embodiment 6 and embodiment 12 as an example, respectively to its resulting foaming for replacing foaming agent with air
Product is tested for the property, and the results are shown in Table 1.
1 results of property of table
As can be seen from Table 1, there is preferable power by the foamed products that the preparation method of the embodiment of the present invention is prepared
Learn performance.
In addition, setting control group 1-6, control group 1-3 successively respectively corresponds embodiment 3, embodiment 6 and embodiment 12, right
130 DEG C are below according to the blowing temperature in group 1-3, control group 4-6 also successively respectively corresponds embodiment 3, embodiment 6 and embodiment
Blowing temperature in 12, control group 4-6 is higher than 150 DEG C.It is the results show that the mechanical property of the foamed products of control group 1-6 is equal
It is worse compared with embodiment 3, embodiment 6 and embodiment 12.
Control group 7-12 is set, and control group 7-9 successively respectively corresponds embodiment 3, embodiment 6 and embodiment 12, control group
Pressure in 7-9 in air foaming mould is below 10 DEG C, and control group 10-12 also successively respectively corresponds embodiment 3,6 and of embodiment
Embodiment 12, the pressure in control group 10-12 in air foaming mould are above 15MPa.Itself the results show that control group 7-12 hair
The mechanical property for steeping product is worse compared with embodiment 3, embodiment 6 and embodiment 12.
Setting control group 13-18, control group 13-15 and control group 16-18 are corresponding in turn to embodiment 3, embodiment 6
With embodiment 12.Blowing temperature is with control group 1 in control group 13, and the pressure in air foaming mould is the same as control group 7；In control group 14
Blowing temperature is with control group 2, and the pressure in air foaming mould is the same as control group 8；Blowing temperature is empty with control group 3 in control group 15
Pressure in gas foaming mould is the same as control group 9；Blowing temperature is with control group 4 in control group 16, and the pressure in air foaming mould is the same as right
According to group 10；Blowing temperature is with control group 5 in control group 17, and the pressure in air foaming mould is the same as control group 11；It is sent out in control group 18
Temperature is steeped with control group 6, and the pressure in air foaming mould is the same as control group 12.Itself the results show that control group 13-18 foamed products
Mechanical property it is either clearly worse compared with embodiment 3, embodiment 6 and embodiment 12, or compared with control group 1-12, and its power
Performance is learned respectively well below control group 1-12.
It is possible thereby to illustrate blowing temperature in preparation process provided in an embodiment of the present invention and pressure to foamed products
Mechanical property has larger impact, is conducive to obtain the preferable foamed products of performance.
In addition, control group 19-21 is arranged by taking embodiment 12 as an example, wherein the foamed time of control group 19 is every 1mm thick
The foamed time of target foamed products is 5min, and the foamed time of control group 20 is the foaming of the target foamed products of every 1mm thickness
Time is 15min, and the foamed time of control group 20 does not consider that the thickness of target foamed products, foamed time amount to 10min.Respectively
Resulting foamed products are tested for the property, the results show that the comprehensive mechanical property of the resulting foamed products of control group 19-21
Worse compared with embodiment 12, wherein the comprehensive mechanical property of control group 21 is worst.Illustrate preparation work provided in an embodiment of the present invention
Foamed time in skill has larger impact to the mechanical property of foamed products, is conducive to obtain the preferable foamed products of performance.
In conclusion the preparation method of the foamed products provided in an embodiment of the present invention for replacing foaming agent with air is simple,
Process is easily-controllable, without foaming agent is used, directly replaces foaming agent, safety and environmental protection with air.Thus obtained foamed products are nontoxic
Tasteless, use is safe, and performance is preferable.
Embodiments described above is a part of the embodiment of the present invention, instead of all the embodiments.Reality of the invention
The detailed description for applying example is not intended to limit the range of claimed invention, but is merely representative of selected implementation of the invention
Example.Based on the embodiments of the present invention, obtained by those of ordinary skill in the art without making creative efforts
Every other embodiment, shall fall within the protection scope of the present invention.
Claims (10)
1. a kind of preparation method for the foamed products for replacing foaming agent with air, comprising the following steps: foaming material pending to be placed in
In air foaming mould, it is passed through in air to the air foaming mould under conditions of 135-145 DEG C into the air foaming mould
Pressure be 11.5-13MPa, foaming, pressure releasing die sinking obtains foamed products；
Foamed time presses the thickness gauge of the foamed products, and the foamed time of the foamed products of every 1mm thickness is 8-12min；
The foaming material pending is obtained through following steps: mixed raw material is kneaded in mixer, and slice or granulation obtain initial material；Sulphur
Change or be crosslinked the initial material, it is cooling, obtain the foaming material pending；
The raw material includes at least one of the raw material of rubber and the raw material of plastic cement；
The temperature of vulcanization or crosslinking is 150-170 DEG C；The time of vulcanization or crosslinking presses the thickness gauge of the foaming material pending, often
The time of vulcanization or the crosslinking of the foaming material pending of 10mm thickness is 10-15min.
2. preparation method according to claim 1, which is characterized in that the air foaming mould under conditions of 140 DEG C
In to be passed through pressure in air to the air foaming mould be 12MPa.
3. preparation method according to claim 1, which is characterized in that the foamed time of the foamed products of every 1mm thickness
For 10min.
4. preparation method according to claim 1, which is characterized in that lock the air with sealing device in foaming process
Foaming mould.
5. the preparation method according to claim 4, which is characterized in that the sealing device includes hydraulic press.
6. preparation method according to claim 1, which is characterized in that the temperature of vulcanization or crosslinking is 160 DEG C.
7. preparation method according to claim 1, which is characterized in that according to parts by weight, the raw material includes 90-110
The BIPB crosslinking agent of the EVA of parts by weight or the calcium carbonate of PE, 20-40 parts by weight and 0.8-1.2 parts by weight.
8. preparation method according to claim 1, which is characterized in that according to parts by weight, the raw material includes 40-60 weight
Measure the calcium carbonate of PE, 20-40 parts by weight of EVA, 40-60 parts by weight of part and the BIPB crosslinking agent of 0.8-1.2 parts by weight.
9. preparation method according to claim 1, which is characterized in that according to parts by weight, the raw material includes 20-40 weight
Measure calcium carbonate, the 15-25 of EPDM, 40-60 parts by weight of NR-3L, 15-25 parts by weight of SBR-1502,40-60 parts by weight of part
The carclazyte of parts by weight, the stearic acid of 0.8-1.2 parts by weight, the zinc oxide of 1.5-2.5 parts by weight, 0.2-0.4 parts by weight M,
The S of the DOP and 1.8-2.2 parts by weight of DM, 40-60 parts by weight of 0.8-1.2 parts by weight.
10. a kind of foamed products for replacing foaming agent with air, which is characterized in that the foamed products are by such as claim 1-9
Any preparation method is prepared.
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