CN1353133A - Process for preparing foamed substance containing continuous bubble pores - Google Patents

Abstract

A process for preparing the foamed substance containing continuous pores used for treating smell foot and preventing the breeding of bacteria includes such steps as mixing ethylene-vinyl acetate, lubricant, bridging agent and foaming agent together, pugging to make into raw material, loading it in mould by 25-50% of mould block coefficient, sulfurizing, foaming, regulating temp. of upper die, shaping for 7-20 min, demoulding and cooling.

Description

Preparation method with the foaming thing in continuous air bubbles hole

The present invention relates to a kind of preparation method who contains the foam of most bubbles.

General ethene-vinyl acetate copolymer (the ethylene-vinyl acetatecopolymer that uses, EVA) made foam, mainly be that its constituent is inserted heating and pressurizing in the thermocompressor, when reaching decomposition temperature, bridging agent at first decomposes, and begin to build bridge, secondly whipping agent produces chemical reaction, produce nitrogen or carbonic acid gas, under continuous high temperature highly compressed situation, bridging agent and whipping agent continue to decompose, produce more substantial nitrogen or carbonic acid gas, and be scattered in the compound, after finishing build bridge back moment die sinking and pressure relief, the gas that is produced expand into countless small bubbles rapidly in the EVA material, to form the effect of foaming, and make its inside have most bubbles, but these bubbles are to be independent and discontinuous shape, even after making tabular finished product, the finished product sanction is gone to epidermis and corner, the bubble of finished product inside is not communicated with each other, do not have a germ resistance yet, when this finished product is made shoe-pad and is placed on the footwear body when inner, the wearer is in walking, running hopscotch makes the vola produce the action that the moment separation presses again with respect to sole, can not be in the inner effect that produces gas flow of footwear body, so that footwear body temperature inside, humidity is too high, grows the infection of smelly enough and bacterium easily.

The object of the present invention is to provide a kind of foot that reduces smelly and prevent the preparation method of the foaming thing with continuous air bubbles hole of bacteria breed.

To achieve the above object, the invention provides a kind of preparation method, it is characterized in that, comprise the following step with the foaming thing in continuous air bubbles hole:

Step (1): prepare quantitative constituent, this constituent includes ethene-vinyl acetate copolymer, lubricant, bridging agent, the whipping agent of predetermined percentage at least;

Step (2): this constituent is carried out even mixing processing with mixing roll, and mixing one-tenth raw material;

Step (3): the raw material of the mixing one-tenth of step (2) inserted with 25%～50% mold filling amount vulcanize a molding tool inside and the processing of foaming, its processing conditions is die pressure 70～150kg/cm ², 125 ℃～175 ℃ of patrix temperature, 135 ℃～185 ℃ of counterdie temperature, molding time 3～10 minutes;

Step (4): the patrix temperature is adjusted into 140 ℃～190 ℃, continues moulding 7～20 minutes;

Step (5): die sinking, cooling can make work in-process;

Step (6): this work in-process sanction is gone to epidermis and corner, can obtain to have the foaming thing finished product in continuous air bubbles hole.

The present invention also provides a kind of preparation method with the foaming thing in continuous air bubbles hole, it is characterized in that, comprises the following step:

Step (1): prepare quantitative constituent, this constituent includes ethene-vinyl acetate copolymer, lubricant, bridging agent, the whipping agent of predetermined percentage at least;

Step (2): this constituent is carried out even mixing processing with mixing roll, and mixing one-tenth raw material;

Step (3): the raw material of the mixing one-tenth of step (2) inserted with 25%～75% mold filling amount one first mould inside vulcanizes and the processing of foaming, its processing conditions is die pressure 70～150kg/cm ², 125 ℃～175 ℃ of patrix temperature, 135 ℃～185 ℃ of counterdie temperature, molding time 3～10 minutes;

Step (4): the patrix temperature is adjusted into 140 ℃～190 ℃, proceeds 5.5～15 minutes;

Step (5): can take out an embryo material after the die sinking, this embryo material be inserted one second mould inside again and carry out post cure and foaming processing, its processing conditions is die pressure 70～150kg/cm ², 135 ℃～190 ℃ of die temperatures, molding time 8～24 minutes;

Step (6): die sinking, cooling can make work in-process;

Step (7): this work in-process sanction is gone to epidermis and corner, can obtain to have the foaming thing finished product in continuous air bubbles hole.

Described preparation method with the foaming thing in continuous air bubbles hole is characterized in that:

This constituent includes 100 parts of ethene-vinyl acetate copolymers, 0～20 part of rubber, 0.2～5 part of lubricant, 0.2～5 part of bridging agent, is total to 0～3 part of bridging agent, 2～20 parts of whipping agents, 0～15 part of frothing aid, 0～100 part of weighting agent, 0～5 part of nucleus agent, 0～20 part of scrap stock, 0.2～5 part of antiseptic-germicide, 0～5 part of tinting material.

With the bubble that the foaming thing inside of preparation method's preparation of the foaming thing with continuous air bubbles hole of the present invention has most continuous, it is smelly and prevent bacteria breed and tool buffering elasticity to reduce foot.

The present invention is described in detail below in conjunction with drawings and Examples:

Fig. 1 is the process block diagram of the present invention first than Cui embodiment.

Fig. 2 is the process block diagram of the present invention second than Cui embodiment.

To be that the present invention is above-mentioned shone the finished product crafters picture taken the photograph with electronics according to taking the photograph microscope than Cui embodiment to Fig. 3.

As shown in Figure 1, the preparation method's of the foaming thing with continuous air bubbles hole of the present invention first embodiment comprises the following step:

Step 1: prepare quantitative constituent, constituent includes 100 parts of ethene-vinyl acetate copolymers (EVA), 0～20 part of rubber, 0.2～5 part of lubricant, 0.2～5 part of bridging agent, is total to 0～3 part of bridging agent, 2～20 parts of whipping agents, 0～15 part of frothing aid, 0～100 part of weighting agent, 0～5 part of nucleus agent, 0～20 part of scrap stock, 0.2～5 part of antiseptic-germicide, 0～5 part of tinting material.

Step 2: this constituent is carried out even mixing processing with mixing roll, and mixing one-tenth raw material.

Step 3: raw material is inserted a molding tool inside with 25%～50% mold filling amount, and make forming mould inside be reserved with enough expansion spaces, the condition of forming process is die pressure 70～150kg/cm ²125 ℃～175 ℃ of patrix temperature, 135 ℃～185 ℃ of counterdie temperature, molding time 3～10 minutes, raw material is subjected to forming mould and heats to the effect of preset temperature, and the expansion space of being reserved in the mould, under continuous high temperature, EVA in the constituent produces bridge formation because of being heated, the link effect, and whipping agent produces chemical reaction and produces a large amount of nitrogen or carbon dioxide, and generate a large amount of bubbles, this decomposing gas of sulfuration is melted in constituent under High Temperature High Pressure, to reach the sulfuration purpose, so can form the crafters (as Fig. 3) that can interconnect and be continuous shape in inside.

Step 4: the patrix temperature is adjusted into 140 ℃～190 ℃, continue moulding 7～20 minutes, the expansible constituent so that make progress gradually, when leveling off to patrix gradually, have enough sulfuration bridge formation temperature, improving composition upper strata bridge formation speed partly, and the bridge formation that makes composition in the forming mould carry out is quite even.

Step 5: remove shaper mold pressing, die sinking, cool off (also shaper can be cooled to die sinking again about 10 ℃), can make work in-process.

Step 6: this work in-process sanction is gone to epidermis and corner, promptly can be made into the foaming thing finished product of the open crafters of tool.

And as shown in Figure 3, shone the finished product of taking the photograph by electronics according to taking the photograph microscope, its inside has most crafterss, so crafters can form continuous shape because of breaking through hole wall, and makes finished product have ventilation property.

The made finished product of first embodiment is applicable to the plate object that thickness is less, shoe-pad knee-pad for example ... Deng, and utilize its inside can connect continuous air bubbles hole to each side face, between the face and each side face of finished product that can guarantee to contact with human body skin, gas has the circulation than Cui, when being applied to shoe-pad, it is inner and between vola and sole that then shoe-pad is located at the footwear body, utilize open continuous air bubbles hole can increase vola gas stream momentum, can reduce shoe temperature, when being applied to protecting ware for sports, then can prevent the generation of eczema, cooperate the antiseptic-germicide of constituent again, then can make shoe-pad, protecting ware for sports etc. have the antibacterial effect than Cui, and can reduce growing of smelly enough and bacterium, and be difficult for accumulating bacterium.

In addition, as shown in Figure 2, the present invention second is mainly used in the bigger finished product of thickness than Cui embodiment, the steps include:

Step 1: prepare quantitative constituent, this constituent formula rate and first embodiment are basic identical.

Step 2: this constituent is carried out even mixing processing with mixing roll, and mixing one-tenth raw material.

Step 3: raw material is inserted one first mould inside with 25%～75% mold filling amount, and make first mould inside be reserved with enough expansion spaces, the condition of forming process is die pressure 70～150kg/cm ², 125 ℃～175 ℃ of patrix temperature, 135 ℃～185 ℃ of counterdie temperature, molding time 3～10 minutes, and make raw material can reach the primary vulcanization and the purpose of foaming for the first time at first mould inside.

Step 4: the patrix temperature is adjusted into 140 ℃～190 ℃, proceeds 5.5～15 minutes, so that the bridge formation that constituent carries out in first mould is quite even.

Step 5: after removing first die pressure, the embryo material in first mould can be cooled off, or while hot this embryo material is inserted one second mould inside and carry out post cure and foaming processing, its processing conditions is die pressure 70～150kg/cm ², 135 ℃～190 ℃ of die temperatures, molding time 8～24 minutes, build bridge when finishing when sulfuration, can form the crafters that interconnect, be continuous shape in inside.

Step 6: remove second mould mold pressing, cool off (also can with die sinking again about second mold cools down to 10 ℃), can make work in-process.

Step 7: this work in-process sanction is gone to epidermis and corner, promptly can be made into the foaming thing finished product of the open crafters of tool.

In a second embodiment, utilize the difference of mold filling amount, and the two-section type sulfuration, the foaming processing that utilize first mould and second mold in turn to carry out, then applicable to the bigger finished product of thickness (as the cushion plate of sports equipment), and make this finished product still have open crafters complete, that link up mutually.

What deserves to be mentioned is, though the made finished product of the present invention is formed with the crafters that majority interconnects, and because of hole wall around breaking through crafters forms continuous shape, but can borrow the formula rate of constituent, and make tissue have suitable intensity, and finished products such as made shoe-pad, protecting ware for sports can't influence its intensity because of having ventilation property.

Claims (3)

1. the preparation method with the foaming thing in continuous air bubbles hole is characterized in that, comprises the following step:

Step (1): prepare quantitative constituent, this constituent includes ethene-vinyl acetate copolymer, lubricant, bridging agent, the whipping agent of predetermined percentage at least:

Step (2): this constituent is carried out even mixing processing with mixing roll, and mixing one-tenth raw material;

Step (3): the raw material of the mixing one-tenth of step (2) inserted with 25%～50% mold filling amount vulcanize a molding tool inside and the processing of foaming, its processing conditions is die pressure 70～150kg/cm ², 125 ℃～175 ℃ of patrix temperature, 135 ℃～185 ℃ of counterdie temperature, molding time 3～10 minutes;

Step (4): the patrix temperature is adjusted into 140 ℃～190 ℃, continues moulding 7～20 minutes;

Step (5): die sinking, cooling can make work in-process;

Step (6): this work in-process sanction is gone to epidermis and corner, can obtain to have the foaming thing finished product in continuous air bubbles hole.

2. the preparation method with the foaming thing in continuous air bubbles hole is characterized in that, comprises the following step:

Step (1): prepare quantitative constituent, this constituent includes ethene-vinyl acetate copolymer, lubricant, bridging agent, the whipping agent of predetermined percentage at least;

Step (2): this constituent is carried out even mixing processing with mixing roll, and mixing one-tenth raw material;

Step (3): the raw material of the mixing one-tenth of step (2) inserted with 25%～75% mold filling amount one first mould inside vulcanizes and the processing of foaming, its processing conditions is die pressure 70～150kg/cm ², 125 ℃～175 ℃ of patrix temperature, 135 ℃～185 ℃ of counterdie temperature, molding time 3～10 minutes;

Step (4): the patrix temperature is adjusted into 140 ℃～190 ℃, proceeds 5.5～15 minutes;

Step (5): can take out an embryo material after the die sinking, this embryo material be inserted one second mould inside again and carry out post cure and foaming processing, its processing conditions is die pressure 70～150kg/cm ², 135 ℃～190 ℃ of die temperatures, molding time 8～24 minutes;

Step (6): die sinking, cooling can make work in-process;

Step (7): this work in-process sanction is gone to epidermis and corner, can obtain to have the foaming thing finished product in continuous air bubbles hole.

3. the preparation method with the foaming thing in continuous air bubbles hole as claimed in claim 1 or 2 is characterized in that:

This constituent includes 100 parts of ethene-vinyl acetate copolymers, 0～20 part of rubber, 0.2～5 part of lubricant, 0.2～5 part of bridging agent, is total to 0～3 part of bridging agent, 2～20 parts of whipping agents, 0～15 part of frothing aid, 0～100 part of weighting agent, 0～5 part of nucleus agent, 0～20 part of scrap stock, 0.2～5 part of antiseptic-germicide, 0～5 part of tinting material.

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