阅读说明：本技术 一种eva收纳篮及其制备方法 (EVA (ethylene-vinyl acetate copolymer) storage basket and preparation method thereof ) 是由 谢泽和 于 2021-10-29 设计创作，主要内容包括：本申请涉及日常生活用品领域,具体公开了一种EVA收纳篮及其制备方法。一种EVA收纳篮,包括收纳篮体以及收纳篮底,所述收纳篮体以及所述收纳篮底皆由基膜制得,所述基膜由以下重量百分比的原料制备：EVA 65%-75%；POE 5%-12%；MVLDPE7%-16%；LDPE 6%-12%。制备方法为：制备基膜,然后将基膜制备成EVA收纳篮；制备基膜具体包括以下步骤：先将EVA、POE、MVLDPE和LDPE混合均匀得到混合物,混合物进行密炼、开炼、造粒,得到半成品；对半成品进行共混熔融、挤出,流延,冷却定型,得到基膜。本申请的一种EVA收纳篮提高收纳篮的质量和使用体验的优点。(The application relates to the field of articles for daily use, and particularly discloses an EVA (ethylene vinyl acetate) storage basket and a preparation method thereof. An EVA storage basket comprises a storage basket body and a storage basket bottom, wherein the storage basket body and the storage basket bottom are both made of a base film, and the base film is made of the following raw materials in percentage by weight: 65% -75% of EVA; 5% -12% of POE; MVLDPE7% -16%; 6 to 12 percent of LDPE. The preparation method comprises the following steps: preparing a base film, and then preparing the base film into an EVA storage basket; the preparation of the base film specifically comprises the following steps: uniformly mixing EVA, POE, MVLDPE and LDPE to obtain a mixture, and banburying, open mixing and granulating the mixture to obtain a semi-finished product; and carrying out blending melting, extrusion, tape casting, cooling and shaping on the semi-finished product to obtain the base film. The utility model provides an EVA is accomodate basket and is improved the quality of accomodating the basket and use the advantage of experiencing.)

1. The utility model provides a basket is accomodate to EVA which characterized in that: the storage basket comprises a storage basket body (1) and a storage basket bottom (2), wherein the storage basket body (1) and the storage basket bottom (2) are both made of a base film, and the base film is made of the following raw materials in percentage by weight:

EVA 65%-75%；

POE 5%-12%；

MVLDPE7%-16%；

LDPE 6%-12%；

0 to 10 percent of other auxiliary agents.

2. The EVA storage basket of claim 1, wherein: the other auxiliary agents comprise a slipping agent, the slipping agent is one or two compositions of oleamide and erucamide, and the weight percentage of the slipping agent in the raw materials of the base film is 0.05-0.12%.

3. The EVA storage basket of claim 2, wherein: the other auxiliary agents comprise calcium carbonate, and the calcium carbonate accounts for 6-10% of the raw material of the base film by weight.

4. The EVA storage basket of claim 2, wherein: the other auxiliary agents comprise a slipping agent and calcium carbonate, the slipping agent accounts for 0.1-0.11 wt% of the raw materials of the base film, the calcium carbonate accounts for 7.25-7.35 wt% of the raw materials of the base film, the slipping agent is a composition of oleamide and erucamide, and the mass ratio of the oleamide to the erucamide is 1 (0.4-0.6).

5. The EVA storage basket of claim 1, wherein: the other auxiliary agents comprise polydimethylsiloxane, and the polydimethylsiloxane accounts for 0.75-0.90% of the raw material of the base film by weight.

6. The EVA storage basket of claim 1, wherein: the other auxiliary agents comprise mildew preventive, the mildew preventive is one or a composition of two of sodium isoascorbate and zinc pyrithione, and the mildew preventive accounts for 2-5 wt% of the raw materials of the base film.

7. The EVA storage basket of claim 1, wherein: the other auxiliary agents comprise ammonium polyphosphate, and the weight percentage of the ammonium polyphosphate in the raw material of the base film is 5-9%.

8. The EVA storage basket of claim 1, wherein: the storage basket body (1) is connected with the storage basket bottom (2) through a sewing belt (3), and a lifting belt (4) is arranged on the storage basket body (1).

9. The method of manufacturing an EVA receiving basket of claims 1-8, wherein: the method comprises the following steps:

preparing a base film, preparing the base film into a storage basket body and a storage basket bottom, and fixedly connecting the storage basket body and the storage basket bottom to prepare an EVA storage basket;

the preparation of the base film specifically comprises the following steps:

step 1a, weighing EVA, POE, MVLDPE and LDPE according to the mass ratio;

step 2a, uniformly mixing EVA, POE, MVLDPE and LDPE to obtain a mixture, banburying the mixture, then carrying out open milling and granulation after the banburying is finished, and then carrying out vibration heat dissipation to obtain a semi-finished product;

and 3a, performing blending melting, extrusion, tape casting and cooling setting on the semi-finished product to obtain the base film.

10. The method of claim 9, wherein the method comprises the steps of: the method comprises the following steps from the preparation of the base film to the preparation of the EVA storage basket:

laminating and pressing the base film into a storage basket bottom (2);

the base film is wound into a cylinder shape and then fixed into a containing basket body (1) through a sewing belt (3);

fixedly connecting one side of the storage basket body (1) with a storage basket bottom (2) through a sewing belt (3), and bonding a lifting belt (4) to the outer side wall of the storage basket body (1) to obtain the EVA storage basket.

Technical Field

The application relates to the technical field of daily necessities, in particular to an EVA (ethylene vinyl acetate) storage basket and a preparation method thereof.

Background

Accomodate basket as daily life instrument commonly used in the daily life articles for use, generally be used for bearing life article. Along with the improvement of consumption level, the demands for the storage baskets in daily life are increasingly diversified, the types of the storage baskets on the market are increased, and the storage baskets are mostly applied to various life scenes such as bedrooms, living rooms and bathrooms.

Accomodate the basket and generally adopt the screen cloth to make, the screen cloth class is accomodate basket simple manufacture, but because the screen cloth texture is softer, the holding power is not enough, and the durability is relatively poor, the problem that collapses appears after long-time the use easily, influences the use and experiences.

Disclosure of Invention

In order to improve the quality and the use experience of the containing basket, the EVA containing basket and the preparation method thereof are provided.

First aspect, the utility model provides a basket is accomodate to EVA adopts following technical scheme:

an EVA storage basket comprises a storage basket body and a storage basket bottom, wherein the storage basket body and the storage basket bottom are both made of a base film, and the base film is made of the following raw materials in percentage by weight:

EVA 65％-75％；

POE 5％-12％；

MVLDPE7％-16％；

LDPE 6％-12％；

0 to 10 percent of other auxiliary agents.

Through adopting above-mentioned technical scheme, EVA is ethylene-ethyl acetate copolymer, POE is polyolefin thermoplastic elastomer, MVLDPE is metallocene low density polyethylene, LDPE is low density polyethylene, it prepares the base film to use EVA as main base member, the texture of base film is harder than the screen cloth, make the holding power who accomodates the basket improve, and POE, MVLDPE and LDPE all have certain toughness and bending resistance respectively, make POE through suitable proportion, MVLDPE and LDPE cooperate and play the additional strengthening to the EVA base member, the intensity of base film has been improved when not increasing base film thickness, thereby improve and accomodate basket bending resistance, wherein MVLDPE can make each raw materials melt after mix more evenly, it is good to impel the toughness of base film, make and accomodate the basket and can withstand a lot of drawing, thereby effectively prolong the life who accomodates the basket, thereby improve the quality and the use experience of accomodating the basket.

Preferably, the other auxiliary agents comprise a slipping agent, the slipping agent is one or two of oleic acid amide and erucamide, and the slipping agent accounts for 0.05-0.12% of the raw material of the base film in percentage by weight.

Through adopting above-mentioned technical scheme, add smooth agent for the texture of base film is softer, and oleamide and erucamide all can improve the surface finish of base film, thereby improves the comfort level when accomodating the basket and using.

Preferably, the other auxiliary agent comprises calcium carbonate, and the calcium carbonate accounts for 6-10% of the raw material of the base film by weight.

Through adopting above-mentioned technical scheme, calcium carbonate plays the filling effect, and the internal structure of reinforcement base film can improve the structural stability of base film, improves the toughness of base film.

Preferably, the other auxiliary agents comprise a slipping agent and calcium carbonate, the slipping agent accounts for 0.1-0.11 wt% of the raw material of the base film, the calcium carbonate accounts for 7.25-7.35 wt% of the raw material of the base film, the slipping agent is a composition of oleamide and erucamide, and the mass ratio of the oleamide to the erucamide is 1 (0.4-0.6).

By adopting the technical scheme, the friction resistance between the surface of the calcium carbonate and EVA and MVLDPE is greatly reduced by the combination and the calcium carbonate which are matched in proportion, so that the caking condition of the calcium carbonate is reduced, the dispersibility of the calcium carbonate is improved, the toughness is improved, and meanwhile, the tear resistance is well supplemented.

Preferably, the other auxiliary agent comprises polydimethylsiloxane, and the polydimethylsiloxane accounts for 0.75-0.90% of the raw material of the base film by weight.

By adopting the technical scheme, the polydimethylsiloxane can play the role of a defoaming agent, effectively inhibits the generation of bubbles in materials in the production process by absorbing the moisture content in the air, and improves the shock resistance of the base film by matching with the slipping agent and the calcium carbonate, so that the base film has better forming quality.

Preferably, the other auxiliary agents comprise a mildew preventive, the mildew preventive is one or a composition of two of sodium isoascorbate and zinc pyrithione, and the mildew preventive accounts for 2-5 wt% of the raw materials of the base film.

Through adopting above-mentioned technical scheme, improve the mould proof antibacterial function who accomodates the basket, make and deposit in the article of accomodating the basket and be difficult for receiving mould to disturb.

Preferably, the other auxiliary agents comprise ammonium polyphosphate, and the weight percentage of the ammonium polyphosphate in the raw material of the base film is 5-9%.

Through adopting above-mentioned technical scheme, improve the flame retardant efficiency who accomodates the basket for accomodate the basket non-deformable under high temperature, the stable performance.

Preferably, the storage basket body is connected with the storage basket bottom through a sewing belt, and a lifting belt is arranged on the storage basket body.

Through adopting above-mentioned technical scheme, the setting up of sewing area makes and accomodates the basket body and accomodate the basket bottom and can separately produce, then connects, improves production efficiency, and the lifting belt can convenient to use person carry accomodate the basket.

In a second aspect, the present application provides a method for manufacturing an EVA storage basket, comprising the steps of:

preparing a base film, preparing the base film into a storage basket body and a storage basket bottom, and fixedly connecting the storage basket body and the storage basket bottom to prepare an EVA storage basket;

the preparation of the base film specifically comprises the following steps:

step 1a, weighing EVA, POE, MVLDPE and LDPE according to the mass ratio;

step 2a, uniformly mixing EVA, POE, MVLDPE and LDPE to obtain a mixture, banburying the mixture, then carrying out open milling and granulation after the banburying is finished, and then carrying out vibration heat dissipation to obtain a semi-finished product;

and 3a, performing blending melting, extrusion, tape casting and cooling setting on the semi-finished product to obtain the base film.

Through adopting above-mentioned technical scheme, prepare the base film that has good intensity and toughness for accomodate the basket and have higher holding power, be convenient for simultaneously tensile folding, improve the practicality of accomodating the basket.

Preferably, the following steps are included between the completion of the preparation of the base film and the preparation of the EVA storage basket:

laminating and pressing the base film into a containing basket bottom;

the base film is wound into a cylinder shape and then fixed into a containing basket body through a sewing belt;

fixedly connecting one side of the containing basket body with the containing basket bottom through a sewing belt, and bonding a lifting belt to the outer side wall of the containing basket body to obtain the EVA containing basket.

Through adopting above-mentioned technical scheme, preparation efficiency is high, accomodates the basket body and accomodates and connect between the bottom of the basket closely, accomodates the whole steadiness of basket height.

In summary, the present application has the following beneficial effects:

1. the application adopts four materials of EVA, POE, MVLDPE and LDPE as main materials, the EVA is an ethylene-ethyl acetate copolymer, the POE is a polyolefin thermoplastic elastomer, the MVLDPE is metallocene low-density polyethylene, the LDPE is low-density polyethylene, the EVA is used as a main matrix to prepare the base film, the texture of the base film is harder than that of the mesh cloth, so that the supporting force of the containing basket is improved, and POE, MVLDPE and LDPE respectively have certain toughness and bending resistance, the POE, the MVLDPE and the LDPE cooperate to reinforce the EVA matrix in a proper proportion, the strength of the base film is improved without increasing the thickness of the base film, thereby improving the bending resistance of the storage basket, wherein the MVLDPE can promote the raw materials to be mixed more uniformly after being melted, promote the toughness of the base film to be good, ensure that the containing basket can be stretched for many times, thereby effectively prolonging the service life of the storage basket, and improving the quality and the use experience of the storage basket;

2. oleic acid amide and erucamide are added so that the texture of base film is softer to this application, improve the use comfort who accomodates the basket to this application still adds calcium carbonate as packing, and the reinforcement base film has still improved the tear-resistant ability of base film simultaneously, improves the durability of accomodating the basket.

Drawings

FIG. 1 is a schematic view of the overall structure of a receiving basket provided herein;

fig. 2 is a schematic view of the overall structure of the storage basket provided by the present application.

Description of reference numerals: 1. a storage basket body; 2. a basket bottom is accommodated; 3. a sewing belt; 4. and (5) lifting the belt.

Detailed Description

The present application will be described in further detail below with reference to the accompanying drawings 1-2, preparation examples, examples and comparative examples.

EVA was selected from DuPont, model 460;

POE was selected from dow chemical, model 8150;

MVLDPE was selected from Dow chemical, model 5220G;

LDPE is selected from China petrochemical group Michname petrochemical Co., Ltd., model 1850A;

polydimethylsiloxane was selected from Shanghai arrow chemical (Suzhou) Inc., model JY-810;

ammonium polyphosphate was purchased from keplerian biotechnology limited, shandong, with a degree of polymerization of 2000.

Example 1

A base film is prepared from the following raw materials:

6.5kgEVA、1.2kgPOE、1.15kgMVLDPE、1.15kgLDPE。

a method of making a base film comprising the steps of:

step 1a, weighing EVA, POE, MVLDPE and LDPE;

step 2a, uniformly mixing EVA, POE, MVLDPE and LDPE to obtain a mixture, carrying out banburying by using a banbury mixer, wherein the banburying temperature is 130 ℃, the banburying time is 20min, carrying out open milling and granulation after the banburying is finished, and then carrying out vibration heat dissipation to obtain a semi-finished product;

and 3a, putting the semi-finished product into a double-screw extruder, blending, melting and extruding at the rotating speed of 40r/min, sequentially and respectively carrying out extrusion and tape casting at the five-zone temperatures of 150 ℃, 160 ℃, 170 ℃, 180 ℃ and 180 ℃ in sequence, wherein the tape casting temperature is 140 ℃, and cooling and shaping to obtain the base film.

A method for preparing an EVA storage basket, as shown in fig. 1 and 2, includes the following steps:

step 1b, laminating and pressing the base film into a storage basket bottom 2;

step 2b, winding the base film into a cylinder, fixing two close side edges of the base film through a sewing belt 3, and manufacturing a storage basket body 1;

and 3b, fixing the edge of one end of the storage basket body 1 with the edge of the storage basket bottom 2 through a sewing belt 3, and respectively bonding two lifting belts 4 to two opposite sides of the outer side wall of the storage basket body 1 to obtain the EVA storage basket.

Examples 2 to 17

Examples 2 to 17 are different from example 1 in the raw material of the base film, and the details are shown in tables 1 and 2.

TABLE 1 Unit (kg)

TABLE 2 Unit (kg)

Comparative example

Comparative examples 1 to 5

Comparative examples 1 to 5 are different from example 5 in the raw material of the base film, as shown in table 3, wherein comparative examples 1 to 5 do not add oleamide, erucamide, calcium carbonate, polydimethylsiloxane, sodium erythorbate, zinc pyrithione, and ammonium polyphosphate.

TABLE 3 Unit (kg)

	EVA	POE	MVLDPE	LDPE
					Comparative example 1	6.00	0.80	2.20	1.00
Comparative example 2	8.10	0.80	0.10	1.00
					Comparative example 3	7.90	0.10	1.00	1.00
Comparative example 4	8.00	0.80	1.00	0.20
					Comparative example 5	6.40	1.60	1.00	1.00

Performance test

Determination of tensile Properties of plastics according to GB/T1040.3-2006 part 3: test conditions for films and sheets the tensile strength of the prepared base films of the different examples and comparative examples was determined and the test data are shown in table 4.

The flexural modulus of the base films prepared in the different examples and comparative examples was determined according to GB/T9341-2008 "determination of the flexural Properties of plastics", the test data being shown in Table 4.

The tear strength of the base films prepared in the different examples and comparative examples was determined according to GB/T16578.1-2008 "determination of tear resistance of Plastic films and sheets", the test data being shown in Table 4.

Notched impact strength was determined for the base films prepared in the different examples and comparative examples according to GB/T1843-2008 "test for determination of Plastic Izod impact Strength", the test data being shown in Table 4.

The mildew-proof effect of the base films prepared in different examples and comparative examples is tested according to GB/T24128-2018 evaluation on the mildew-proof effect of the plastic mildew-proof agent, and the test results are shown in Table 4.

The flame retardant effect of the base films of the different examples and comparative examples was tested according to UL94, the results of which are shown in table 4.

TABLE 4

As can be seen from table 4, in combination with example 5 and comparative examples 1 to 5, the base film prepared by the method has good tensile strength, flexural modulus, tear strength and impact resistance, so that the storage basket prepared from the base film has good strength and toughness, a firm structure, bending resistance and good external force resistance, the storage basket has high durability, and the use experience of the storage basket can be improved; and shows that the EVA, the POE, the MVLDPE and the LDPE cooperate with each other in a limited range, thereby improving the performance of the base film.

By combining example 5 with examples 1-4, the base film can be made to have more balanced tensile strength, flexural modulus, tear strength and impact resistance by adjusting the ratio of the EVA, POE, MVLDPE and LDPE within the defined ranges.

By combining the embodiment 5 and the embodiments 6 to 11, the tensile strength, the flexural modulus, the tear strength and the impact resistance of the base film are not greatly influenced by only adding the slipping agent oleamide and the erucamide, the tensile strength and the impact strength can be improved to a certain extent by only adding the calcium carbonate, the total proportion of the oleamide and the erucamide and the proportion of the oleamide and the erucamide are controlled, and the total proportion of the calcium carbonate is controlled, so that the effect of improving the tear strength can be additionally obtained, the capability of the base film for resisting external force is further improved, the durability of the storage basket is improved, the good flexural modulus of the base film is maintained, and the bending resistance is improved.

By combining example 11 with examples 12 to 13, the impact strength of the base film was further enhanced by adding polydimethylsiloxane, thereby improving the toughness of the storage basket.

By combining the embodiment 5 with the embodiments 14-15, the sodium isoascorbate and the zinc pyrithione are added as the mildew preventive, so that the growth of the mildew on the basement membrane can be inhibited, and the mildew-proof and antibacterial performance of the containing basket can be improved.

By combining the embodiment 5 with the embodiments 16-17, ammonium polyphosphate is added as a flame retardant, so that the flame retardant effect of the base film is better.

The present embodiment is only for explaining the present application, and it is not limited to the present application, 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 application.