CN111234438A

CN111234438A - Emulsion pump suction pipe of environment-friendly thermoplastic elastomer and preparation method thereof

Info

Publication number: CN111234438A
Application number: CN202010029576.6A
Authority: CN
Inventors: 郑军烽; 王振堂; 杨宏
Original assignee: Yuyao Hongda Sprayer Co ltd
Current assignee: Yuyao Hongda Sprayer Co ltd
Priority date: 2020-01-11
Filing date: 2020-01-11
Publication date: 2020-06-05

Abstract

The invention discloses an emulsion pump suction pipe of an environment-friendly thermoplastic elastomer, and relates to a thermoplastic elastomer which comprises, by mass, 54-62 parts of SBS, 12-16 parts of shell powder, 8-12 parts of glyceryl stearate, 8-14 parts of PP, 15-19 parts of white oil, 3-5 parts of EDTA disodium, 5-8 parts of a lubricant, 2-4 parts of an anti-ultraviolet agent and 1-3 parts of an antioxidant. The material can be limited in the emulsion, so that the possibility of migration of the material to the emulsion is reduced, the environment-friendly effect is achieved, and meanwhile, the production method is convenient and suitable for large-scale production.

Description

Emulsion pump suction pipe of environment-friendly thermoplastic elastomer and preparation method thereof

Technical Field

The invention relates to the field of emulsion pumps, in particular to an emulsion pump suction pipe made of an environment-friendly thermoplastic elastomer and a preparation method thereof.

Background

The emulsion pump is also called as a press type emulsion pump, and is a liquid distributor which utilizes the principle of atmospheric balance, pumps out feed liquid in a bottle by pressing and supplements external atmosphere into the bottle. The main performance indexes of the emulsion pump are as follows: the air compression frequency, the pump discharge amount, the down pressure, the opening torque of the pressure head, the rebound speed, the water inflow index and the like.

For example, chinese patent publication No. CN205891606U discloses a lotion pump, which comprises a pump head and a conduit, wherein the conduit comprises a position-limiting strip, a body and a suction tube. Wherein, the straw is mainly used for carrying the emulsion in the emulsion bottle to can guarantee that the straw can comparatively fully absorb the emulsion in the emulsion bottle. Under general conditions, the length of straw on the one hand generally all can be longer than the body of emulsion bottle, and on the other hand, the material for producing the straw often is thermoplastic elastomer, for example TPE, TPR etc. the mouth of pipe of straw just so can carry out diversified adjustment in emulsion bottle bottom to be favorable to the emulsion in all positions can both be inhaled by the straw.

For this reason, many of the existing emulsion pumps are applied to the fields of cosmetics and foods, but acetic acid, ethanol or grease is commonly added to cosmetics and foods, and thermoplastic elastomers conventionally used for producing straws are commonly added with some additives which are easily migrated into the cosmetics or foods, for example, chinese patent publication No. CN103724781A discloses a TPE refrigerator door seal pellet prepared from 40-50 parts of POE plastic, 30-50 parts of PP elastomer, 15-20 parts of SEBS, 5-15 parts of naphthenic oil, 0.2-0.6 part of antioxidant, 0.2-0.6 part of lubricant, 10-20 parts of filler and 0-5 parts of pigment, wherein the antioxidant is at least one of pentaerythrityl tetrakis (β - (3, 5-di-tert-butyl-4-hydroxyphenyl) propionate) (1010), tris (2, 4-di-tert-butylphenyl) phosphite (168), dioctadecyl thiodipropionate (DSTDP), and the antioxidant is easily dissolved in organic solvents, so that the antioxidant is easily absorbed by human bodies along with the common organic solvents, thereby easily affecting human body health.

Therefore, there is a need to develop an environmentally friendly thermoplastic elastomer which is not easy to migrate to produce the straw of the emulsion pump so as to ensure the health of people.

Disclosure of Invention

The invention aims to provide the emulsion pump suction pipe of the environment-friendly thermoplastic elastomer, the substances in the emulsion pump suction pipe are not easy to migrate to the emulsion, so that the probability of absorbing toxic substances by a human body is reduced, and the preparation method is simple and suitable for large-scale production.

The above object of the present invention is achieved by the following technical solutions: an emulsion pump suction pipe of an environment-friendly thermoplastic elastomer comprises the following components in parts by weight,

54-62 parts of SBS

12-16 parts of shell powder

8-12 parts of glycerol stearate

8-14 parts of PP

15-19 parts of white oil

3-5 parts of EDTA disodium

5-8 parts of lubricant

2-4 parts of anti-ultraviolet agent

1-3 parts of an antioxidant.

By adopting the technical scheme, the shell powder has more pores and has stronger adsorption effect on organic matters, thereby reducing the probability of outward diffusion of materials in the straw. Moreover, the glyceryl stearate has an emulsifying and dispersing effect, so that the materials can be uniformly dispersed in SBS, the probability of layering among the materials is reduced, and particularly, the probability of transferring part of the materials to the surface of the straw after the straw is manufactured is reduced.

In addition, the addition of the disodium EDTA can mask metal ions in the emulsion contacted with the straw, so that the damage of the metal ions to the straw absorbing material can be reduced, and the probability of the materials in the straw migrating from the damaged part to the emulsion is reduced.

Preferably, the lubricant is a mixture of monoglyceride and oleamide, and the mass ratio of the monoglyceride to the oleamide is 1.5: 1.

By adopting the technical scheme, on one hand, the monoglyceride contributes to fully mixing the materials, so that the probability of diffusion of the materials to the surface of the straw is reduced, the oleamide contributes to smoothing the surface of the straw, the greater friction force generated between the emulsion and the surface of the straw in the flowing process is reduced, the probability of erosion of the surface of the straw is reduced, and the probability of migration of the materials in the straw to the emulsion is improved.

Preferably, the detergent also comprises 2-4 parts of potassium lauryl phosphate.

By adopting the technical scheme, firstly, the potassium lauryl phosphate is an anionic surfactant, and the uniform mixing of all materials can be effectively realized. In addition, before assembly, if the suction pipe is bitten by insects, potassium lauryl phosphate and oleamide enter the insects, the oleamide destroys chitin layers on the walls of the insects, and the potassium lauryl phosphate dissolves wax layers on the walls of the insects after passing through the destroyed chitin layers and adheres to respiratory tracts of the insects to form a waterproof and airtight membrane, so that the insects are easily suffocated and die, and the insect prevention effect is achieved.

Preferably, the antioxidant is a mixture of tea polyphenol and vitamin C, and the mass ratio of the tea polyphenol to the vitamin C is 3: 1.

By adopting the technical scheme, on one hand, the tea polyphenol and the vitamin C are natural substances and basically cannot influence the human body, so that the tea polyphenol and the vitamin C cannot influence the human body even if the tea polyphenol and the vitamin C are transferred into the emulsion. On the other hand, tea polyphenol, as a main antioxidant, contains O-H reactive functional groups with active hydrogen atoms, and macromolecular free radicals R and peroxy free radicals ROO generated by the transfer of hydrogen atoms and the action of heat, light and oxygen generate relatively stable macromolecules, and the macromolecular free radicals R and the peroxy free radicals ROO become low-activity free radicals Ar incapable of propagating chain reaction, so that the chain reaction is stopped.

And the vitamin C can be used as an auxiliary antioxidant and can perform synergistic action with the tea polyphenol to effectively improve the antioxidant performance of the tea polyphenol. In addition, the EDTA disodium can protect the vitamin C, so that the probability of rapid oxidation consumption of the vitamin C is reduced, and the anti-oxidation time of the straw is prolonged.

Preferably, the anti-ultraviolet agent is a mixture of phenyl salicylate and nano titanium dioxide, and the mass of the phenyl salicylate and the nano titanium dioxide is 0.5: 1.

By adopting the technical scheme, on one hand, the granularity of the nano titanium dioxide is small, the nano titanium dioxide can be fully and uniformly mixed with various materials, on the other hand, the nano titanium dioxide can effectively reflect ultraviolet rays, and the ultraviolet aging resistance of SBS is improved. The phenyl salicylate can absorb short-wave high-energy UV rays (250-340 nm) by utilizing conversion between single and double bonds in a molecule, and convert the absorbed high energy into long-wave low energy (more than 380nm) for radiation. The ultraviolet rays radiated out are easier to be reflected by the nano titanium dioxide to the direction far away from the straw, so that the ultraviolet rays and the nano titanium dioxide jointly act to effectively reduce the ultraviolet aging of the straw.

Preferably, the shell powder has a particle size of less than 10 um.

Through adopting above-mentioned technical scheme, shell powder can comparatively fully dissolve mutually with other materials like this, has guaranteed the homogeneity of material.

A method for preparing an emulsion pump suction pipe of an environment-friendly thermoplastic elastomer comprises the following steps,

step one, weighing SBS and white oil according to requirements, stirring and mixing the SBS and the white oil at the temperature of 50-60 ℃ until the SBS completely absorbs the white oil;

step two, weighing PP and glyceryl stearate according to requirements, adding the PP and the glyceryl stearate into the SBS obtained in the step one, and mixing uniformly again to obtain a mixture I;

step three, weighing shell powder, EDTA disodium, a lubricant, an anti-ultraviolet agent and an antioxidant, adding the weighed shell powder, EDTA disodium, the lubricant, the anti-ultraviolet agent and the antioxidant into the mixture I obtained in the step two, and uniformly mixing to obtain a mixture II;

and step four, adding the mixture II into an extruder, performing melt extrusion, and injecting into a mold to obtain a finished product of the emulsion pump suction pipe.

Preferably, the shell powder is prepared by processing shells through diammonium hydrogen phosphate and carbamide in a water bath at 60-80 ℃ and grinding.

By adopting the technical scheme, the shell powder can be converted into hydroxyapatite after being treated by diammonium hydrogen phosphate and carbamide, and the hydroxyapatite can effectively improve the capability of the surface of the straw for resisting the corrosion of ethanol, acetic acid and grease, thereby reducing the effect of spreading the materials into the emulsion.

In addition, because the diammonium hydrogen phosphate is acidic, the shell powder is easy to degrease in an acidic environment, so that the chitin in the shell powder can be released, the antibacterial property of the straw is enhanced, and the chitin also has certain viscosity, which is beneficial to improving the integrity of the straw, thereby reducing the material direction

Preferably, the temperature of the extruder from the feeding end of the mixture II to the extrusion head is divided into three sections, namely 100-140 ℃, 140-200 ℃ and 80-60 ℃.

Through adopting above-mentioned technical scheme, divide into the temperature interval of three sections in the extruder, can make the material take place to melt gradually like this to and cool off solidification gradually, thereby can enough guarantee the homogeneity of the mixture of material, reduce the possibility that the part takes place the coking again.

In conclusion, the beneficial technical effects of the invention are as follows:

1. on one hand, the shell powder can adsorb materials, so that the straw can be prevented from migrating towards the direction of emulsion, on the other hand, the EDTA disodium can mask metal ions, and the situation that the metal ions promote the surface of the straw to be oxidized to generate a gap and the materials migrate from the gap to the emulsion is avoided;

2. the monoglyceride and the oleamide are used as the lubricating agent, so that on one hand, the materials can be effectively and fully mixed to avoid layering among the materials, so that the materials migrate into the emulsion, on the other hand, the surface smoothness of the straw is ensured, and the large friction between the emulsion and the straw is reduced, so that the materials enter the emulsion;

3. the shell powder can generate hydroxyapatite through the treatment of diammonium hydrogen phosphate and carbamide, so that the ethanol and acetic acid corrosion resistance of the straw can be improved when the shell powder is coated on the surface of the straw, and meanwhile, esters in the shell powder are treated by diammonium hydrogen phosphate and are easy to fall off from the shell powder, so that chitin can be released, and the antibacterial property of the straw is improved.

Drawings

FIG. 1 is a flow chart of a process for preparing an environmental-friendly thermoplastic elastomer emulsion pump straw.

Detailed Description

The invention is described in further detail below with reference to fig. 1.

The first embodiment is as follows:

step one, weighing 54KgSBS and 15Kg white oil, stirring and mixing the SBS and the white oil at the temperature of 50-60 ℃ until the SBS completely absorbs the white oil;

step two, weighing 8KgPP and 8Kg glyceryl stearate, adding the weighed materials into the SBS in the step one, and mixing the materials uniformly again to obtain a mixture I;

step three, weighing 12Kg of shell powder, 3Kg of EDTA disodium, 5Kg of lubricant, 2Kg of uvioresistant agent and 1Kg of antioxidant, adding the weighed materials into the mixture I obtained in the step two, and uniformly mixing to obtain a mixture II;

The lubricant is a mixture of monoglyceride and oleamide, the mass ratio of monoglyceride to oleamide is 1.5: 1, the antioxidant is a mixture of tea polyphenol and vitamin C, the mass ratio of tea polyphenol to vitamin C is 3: 1, the anti-ultraviolet agent is a mixture of phenyl salicylate and nano titanium dioxide, and the mass ratio of phenoxyethanol to nano titanium dioxide is 0.5: 1.

In addition, the preparation method of the shell powder comprises the following steps:

the method comprises the following steps: mixing diammonium phosphate, carbamide and distilled water to prepare a mixed water solution, wherein the concentration of diammonium phosphate in the mixed water solution is 0.1mol/L, and the concentration of carbamide is 0.1 mol/L;

step two: putting the shell into the mixed aqueous solution, and meanwhile, putting the mixed aqueous solution with the shell into a water bath at the temperature of 60-80 ℃ for 30 min;

step three: taking out the shell, and grinding the shell to powder smaller than 10um to obtain the finished shell powder.

Meanwhile, the temperature of the extruder from the feeding end of the mixture II to the extrusion head is divided into three sections, namely 100-140 ℃, 140-200 ℃ and 80-60 ℃. The time of the material passing through the first temperature section is 15-20 s, the time of the material passing through the second temperature section is 20-30 s, and the time of the material passing through the third temperature section is 10-15 s.

Comparative example one:

the comparative example differs from example one only in that the antioxidants are all tea polyphenols.

Comparative example two:

this comparative example differs from example one only in that the antioxidants are all vitamin C.

Example two:

step one, weighing 58KgSBS and 17Kg white oil, stirring and mixing the SBS and the white oil at the temperature of 50-60 ℃ until the SBS completely absorbs the white oil;

step two, weighing 11KgPP and 10Kg glyceryl stearate, adding the weighed materials into the SBS in the step one, and mixing the materials uniformly again to obtain a mixture I;

step three, weighing 14Kg of shell powder, 4Kg of EDTA disodium, 6.5Kg of lubricant, 3Kg of uvioresistant agent and 2Kg of antioxidant, adding the weighed materials into the mixture I obtained in the step two, and uniformly mixing to obtain a mixture II;

Comparative example three:

the comparative example differs from example three only in that the shell powder has not been treated with diammonium phosphate and carbamide.

Example three:

step one, weighing 62KgSBS and 19Kg white oil, stirring and mixing the SBS and the white oil at the temperature of 50-60 ℃ until the SBS completely absorbs the white oil;

step two, weighing 14KgPP and 12Kg glyceryl stearate, adding the weighed materials into the SBS in the step one, and mixing the materials uniformly again to obtain a mixture I;

step three, weighing 16Kg of shell powder, 5Kg of EDTA disodium, 8Kg of lubricant, 4Kg of uvioresistant agent and 3Kg of antioxidant, adding the weighed materials into the mixture I obtained in the step two, and uniformly mixing to obtain a mixture II;

Example four:

step one, weighing 62KgSBS and 17Kg white oil, stirring and mixing the SBS and the white oil at the temperature of 50-60 ℃ until the SBS completely absorbs the white oil;

step three, weighing 14Kg of shell powder, 5Kg of EDTA disodium, 8Kg of lubricant, 2Kg of uvioresistant agent and 2Kg of antioxidant, adding the weighed materials into the mixture I obtained in the step two, and uniformly mixing to obtain a mixture II;

Comparative example four:

the comparative example only differs from example one in that the anti-uv agents are all phenyl salicylate.

Comparative example five:

the difference between the comparative example and the first example is that the uvioresistant agent is all nano titanium dioxide.

Example five:

a preparation method of an emulsion pump suction pipe of an environment-friendly thermoplastic elastomer is based on the fourth embodiment, and 2Kg of potassium lauryl phosphate is also added in the third step.

Example six:

a preparation method of an emulsion pump suction pipe of an environment-friendly thermoplastic elastomer is based on the fourth embodiment, and 3Kg of potassium lauryl phosphate is also added in the third step.

Example seven:

a preparation method of an emulsion pump suction pipe of an environment-friendly thermoplastic elastomer is based on the fourth embodiment, and 4Kg of potassium lauryl phosphate is also added in the third step.

The tests of examples one to seven and comparative examples one to five were carried out according to the following test methods:

1. detecting the material migration quantity: according to the standard GB4806.7-2016, the total migration of detection indexes in acetic acid, ethanol and olive oil is less than or equal to 10mg/dm³：

2. And (3) antioxidant test: the pipette was placed in an environment at 80 ℃ and 60% relative humidity for 24h and then tested according to GB 4806.7-2016:

3. and (3) ultraviolet resistance test: the pipette was placed at a strength of 5400uW/m²The ultraviolet radiation environment is 24 hours, and then the detection is carried out according to GB 4806.7-2016:

4. dripping 5 drops of 50 wt% glucose culture medium on a suction pipe, then placing the suction pipe in an environment at 37 ℃ for 3 days, and observing the number of bacterial colonies on the suction pipe;

5. 50 termites were placed in 1dm of 10cm by 2cm extrudate³And then observing the survival amount of the termites.

The results of the final testing are shown in Table one below

As is clear from the above table, the pipette of the present application has a small migration amount of organic solvent, and meets the relevant regulations of GB 4806.7-2016. Moreover, as can be seen from the comparison between the example one and the comparative example one, the antioxidant property of the straw can be improved by selecting the compound antioxidant of tea polyphenol and vitamin C compared with the antioxidant property of the straw which is selected by selecting tea polyphenol or vitamin C alone. Secondly, as can be seen from the comparison between the second example and the third comparative example, the shell powder treated by the diammonium phosphate and the carbamide can improve the antibacterial property and the oxidation resistance and the ultraviolet resistance of the straw. Furthermore, as can be seen from the comparison between the example four and the comparative examples four and five, the ultraviolet resistance of the straw is improved more easily by selecting the anti-ultraviolet agent compounded by the phenyl salicylate and the nano titanium dioxide than by selecting the phenyl salicylate or the nano titanium dioxide alone. Finally, as can be seen from the fifth to seventh examples, the potassium lauryl phosphate added can act synergistically with the carbamide to kill insects.

The present embodiment is only for explaining the present invention, and it is not limited to the present invention, and those skilled in the art can make modifications of the present embodiment without inventive contribution as needed after reading the present specification, but all of them are protected by patent law within the scope of the claims of the present invention.

Claims

1. An emulsion pump suction pipe of environmental protection thermoplastic elastomer which characterized in that: the raw materials of the material comprise the following components in parts by weight,

2. the environmental friendly thermoplastic elastomer emulsion pump pipette as defined in claim 1, wherein: the lubricant is a mixture of monoglyceride and oleamide, and the mass ratio of the monoglyceride to the oleamide is 1.5: 1.

3. The environmental friendly thermoplastic elastomer emulsion pump pipette as defined in claim 2, wherein: the paint also comprises 2-4 parts of potassium lauryl phosphate.

4. The environmental friendly thermoplastic elastomer emulsion pump pipette as defined in claim 1, wherein: the antioxidant is a mixture of tea polyphenol and vitamin C, and the mass ratio of the tea polyphenol to the vitamin C is 3: 1.

5. The environmental friendly thermoplastic elastomer emulsion pump pipette as defined in claim 1, wherein: the anti-ultraviolet agent is a mixture of phenyl salicylate and nano titanium dioxide, and the mass ratio of the phenoxyethanol to the nano titanium dioxide is 0.5: 1.

6. The environmental friendly thermoplastic elastomer emulsion pump pipette as defined in claim 1, wherein: the granularity of the shell powder is less than 10 um.

7. The method for preparing the environmental-friendly thermoplastic elastomer emulsion pump straw as claimed in any one of claims 1 to 6, wherein: comprises the following steps of (a) carrying out,

8. The method for preparing the environmental-friendly thermoplastic elastomer emulsion pump straw as claimed in claim 7, wherein the method comprises the following steps: the shell powder is prepared by processing shells in a water bath at 60-80 ℃ through a mixed water solution of diammonium hydrogen phosphate and carbamide and grinding.

9. The method for preparing the environmental-friendly thermoplastic elastomer emulsion pump straw as claimed in claim 7, wherein the method comprises the following steps: the temperature of the extruder from the feeding end of the mixture II to the extrusion head is divided into three sections, namely 100-140 ℃, 140-200 ℃ and 80-60 ℃ in sequence.