CN112226014B

CN112226014B - Soft high-elastic PVC glove and preparation method thereof

Info

Publication number: CN112226014B
Application number: CN202011091317.2A
Authority: CN
Inventors: 张伯侯; 马万青; 董松; 张天柱
Original assignee: Anhui Hokai Medical Supplies Technology Co ltd
Current assignee: Anhui Hokai Medical Supplies Technology Co ltd
Priority date: 2020-10-13
Filing date: 2020-10-13
Publication date: 2023-05-09
Anticipated expiration: 2040-10-13
Also published as: CN112226014A

Abstract

The invention discloses a soft high-elastic PVC glove which is prepared from the following raw materials in parts by weight: 100 parts of PVC paste resin, 50-60 parts of plasticizer, 10-20 parts of elastomer, 25-30 parts of viscosity reducer and 0.5-1 part of stabilizer. The elastic body is prepared, the hydrophobic polyether polyurethane obtained by the reaction of the polyether polyol treated by the hydrophobic substance and the cyanate ester has good compatibility with PVC, plasticizers with different molecular weights uniformly dispersed in the PVC can be adhered together to form a plasticizer net, the elastic resilience, softness and wear resistance of the PVC glove are enhanced, the problems of low softness and poor elasticity of the common PVC glove are solved, and the soft high-elasticity PVC glove is obtained, and the preparation method is simple, easy to operate and low in cost.

Description

Soft high-elastic PVC glove and preparation method thereof

Technical Field

The invention belongs to the technical field of plastic gloves, and relates to a soft high-elastic PVC glove and a preparation method thereof.

Background

At present, china has become the world PVC glove production base, and is the world's most important PVC glove supply place. With the appearance and continuous development of PVC gloves, the PVC gloves are gradually favored by masses in the market, and have the advantages of relatively simple production process, comfortable wearing, difficult allergy, stronger tensile strength, puncture resistance, difficult breakage, good sealing property, excellent dust diffusion prevention and chemical resistance, low acid and alkali resistance, low surface chemical residual substances, low ion content and the like, so that the PVC gloves are widely applied to various fields of medical treatment, scientific research, electronics, food and the like. At present, some domestic fields have started to tend to use PVC gloves instead of latex gloves, and the market of PVC gloves is gradually growing.

Along with the continuous growth of the PVC glove market, the market and clients have higher and higher requirements on the hand feeling, softness and elasticity of the PVC glove, but on the other hand, the common PVC glove is affected by the PVC material and the plasticizer, and has poor elasticity. This contradiction has increasingly limited the development of the PVC glove market, and thus improving the softness and elasticity of PVC gloves has become an urgent need in the industry.

Disclosure of Invention

The invention aims to provide a soft high-elastic PVC glove and a preparation method thereof, solves the problems of low softness and poor elasticity of the common PVC glove by adding an elastomer, and has the characteristics of low production cost and good hand feeling and elasticity.

The aim of the invention can be achieved by the following technical scheme:

a soft high-elastic PVC glove is prepared from the following raw materials in parts by weight: 100 parts of PVC paste resin, 50-60 parts of plasticizer, 10-20 parts of elastomer, 25-30 parts of viscosity reducer and 0.5-1 part of stabilizer;

the preparation method of the soft high-elastic PVC glove specifically comprises the following steps:

step S1: preparing raw material emulsion: mixing and stirring the plasticizer and the elastomer, sequentially adding the PVC paste resin and the stabilizer, stirring, standing and defoaming for 24 hours, adding the viscosity reducer, and uniformly stirring;

step S2: dipping: filtering the raw material emulsion prepared in the step S1, vacuumizing, defoaming for 3 hours, then placing the raw material emulsion into an impregnating tank, preheating a hand die to 55-65 ℃ at the same time, and placing the hand die into the impregnating tank for impregnating at the temperature of 50-60 ℃;

step S3: plasticizing and forming: placing the immersed hand mould into an oven, keeping the hand mould rotating, and baking for 5-10 min at 200-230 ℃;

step S4: cooling and post-treatment: after the PVC glove is formed, the hand mould is taken out of the oven, naturally cooled, and the soft high-elastic PVC glove is obtained through lip rolling, powder dipping, demoulding and powder removal.

Further, the plasticizer is obtained by mixing dioctyl terephthalate (DOTP) and dioctyl adipate (DOA) according to a ratio of 3-4:1; the DOTP (dioctyl terephthalate) is a novel environment-friendly plasticizer, has low product price and excellent performance, and has the advantages of high plasticizer efficiency, environmental protection, no toxicity, long heat stability time, good compatibility with polymer, low volatility, exudation inhibition and the like; the dioctyl adipate (DOA) can endow products with good low-temperature softness and light resistance, has certain water resistance, has good lubricity during processing, and has good handfeel.

Further, the stabilizer is a high-efficiency liquid calcium zinc stabilizer, and the model is CZ-320; it has the advantages of low viscosity, good compatibility, excellent transparency and good tinting strength, has the characteristics of excellent long-term heat stability, and the like, and is a good nontoxic stabilizer.

Further, the viscosity reducer is dearomatization oil, and the model is D90.

Further, the elastomer is hydrophobic polyether polyurethane, and is prepared by the following steps:

step A1, slowly adding a hydrophobic substance into polyether polyol under the condition of stirring, so that the hydrophobic substance is uniformly dispersed in the polyether polyol;

a2, transferring the obtained product in the step A1 into a four-neck flask with a stirrer, a condenser tube, a thermometer, a nitrogen introducing tube and a constant pressure funnel, heating to 100-130 ℃, and dehydrating for 2 hours;

and A3, cooling to normal temperature, adding 2, 4-toluene diisocyanate under the protection of nitrogen, stirring and heating to 60-80 ℃, measuring the-NCO value once every 0.5h, stopping the reaction when the-NCO value reaches 5-6%, and defoaming until the polyurethane elastomer is transparent to obtain the hydrophobic polyether polyurethane elastomer.

Further, the hydrophobic substance in the step A1 is fluorocarbon auxiliary agent, and the addition amount is 1.2 percent of the total mass fraction of the reactants.

Further, the relative molecular mass of the polyether polyol described in step A1 is 1500.

Further, the molar ratio of the 2, 4-toluene diisocyanate to the polyether polyol in the step A3 is 1:5.

a preparation method of soft high-elastic PVC gloves specifically comprises the following steps:

step S3: plasticizing and forming: placing the immersed hand mould into an oven, keeping the hand mould rotating, ensuring that the hand mould is heated uniformly, and baking for 5-10 min at 200-230 ℃;

The invention has the beneficial effects that:

according to the soft high-elastic PVC glove and the preparation method thereof, the added elastomer is hydrophobic polyether polyurethane, the hydrophobicity and the surface tension of the elastomer are effectively improved by introducing the hydrophobic substance fluorocarbon auxiliary agent, and the water resistance of the elastomer is improved. The preparation method is simple, easy to operate and low in cost.

Detailed Description

The technical solutions of the present invention will be clearly and completely described in connection with the embodiments, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.

Example 1:

the soft high-elastic PVC glove is prepared from the following raw materials in parts by weight: 100 parts of PVC paste resin, 50 parts of plasticizer, 20 parts of elastomer, 25 parts of dearomatization oil and 1 part of high-efficiency liquid calcium zinc stabilizer, and the preparation method comprises the following steps:

step S1: preparing raw material emulsion: mixing and stirring the plasticizer and the elastomer, sequentially adding the PVC paste resin and the high-efficiency liquid calcium zinc, stirring, standing and defoaming for 24 hours, adding the dearomatization oil, and uniformly stirring;

step S2: dipping: filtering the raw material emulsion prepared in the step S1, vacuumizing, defoaming for 3 hours, then placing the raw material emulsion into an impregnating tank, preheating a hand die to 60 ℃ at the same time, and placing the hand die into the impregnating tank for impregnating at the temperature of 60 ℃;

step S3: plasticizing and forming: placing the immersed hand mould into an oven, keeping the hand mould rotating, ensuring that the hand mould is heated uniformly, and baking for 5min at 220 ℃;

step S4: cooling and post-treatment: after the PVC glove is molded, taking out the hand mold from the oven, naturally cooling, and rolling the lip, dipping powder, demolding and removing powder to obtain the soft high-elasticity PVC glove; the plasticizer is obtained by mixing dioctyl terephthalate and dioctyl adipate according to a molar ratio of 4:1.

Embodiment case 2:

the soft high-elastic PVC glove is prepared from the following raw materials in parts by weight: 100 parts of PVC paste resin, 50 parts of plasticizer, 15 parts of elastomer, 25 parts of dearomatization oil and 1 part of high-efficiency liquid calcium zinc stabilizer, wherein the preparation method comprises the following steps:

step S2: dipping: filtering the raw material emulsion prepared in the step S1, vacuumizing, defoaming for 3 hours, then placing the raw material emulsion into an impregnating tank, preheating a hand die to 60 ℃ at the same time, and placing the hand die into the impregnating tank for impregnating at 560 ℃;

step S4: cooling and post-treatment: after the PVC glove is molded, taking out the hand mold from the oven, naturally cooling, and rolling the lip, dipping powder, demolding and removing powder to obtain the soft high-elasticity PVC glove; the plasticizer is obtained by mixing dioctyl terephthalate and dioctyl adipate according to a molar ratio of 4:1

Embodiment 3:

the soft high-elastic PVC glove is prepared from the following raw materials in parts by weight: 100 parts of PVC paste resin, 50 parts of plasticizer, 10 parts of elastomer, 25 parts of dearomatization oil and 1 part of high-efficiency liquid calcium zinc, and the preparation method comprises the following steps:

Comparative example 1:

the PVC glove is prepared from the following raw materials in parts by weight: 100 parts of PVC paste resin, 50 parts of dioctyl phthalate, 10 parts of elastomer, 25 parts of dearomatization oil and 1 part of high-efficiency liquid calcium zinc, and the preparation method comprises the following steps:

step S1: preparing raw material emulsion: stirring dioctyl phthalate, PVC paste resin and high-efficiency liquid calcium zinc, standing for deaeration for 24 hours, adding dearomatization oil, and uniformly stirring;

step S4: cooling and post-treatment: and after the PVC glove is molded, taking the hand mold out of the oven, naturally cooling, and carrying out lip rolling, powder dipping, demolding and powder removal to obtain the PVC glove.

Comparative example 2:

the PVC glove is prepared from the following raw materials in parts by weight: 100 parts of PVC paste resin, 50 parts of plasticizer, 0 part of elastomer, 25 parts of dearomatization oil and 1 part of high-efficiency liquid calcium zinc, and the preparation method comprises the following steps:

step S1: preparing raw material emulsion: stirring the plasticizer, the PVC paste resin and the high-efficiency liquid calcium zinc, standing and defoaming for 24 hours, adding the dearomatization oil, and uniformly stirring;

step S4: cooling and post-treatment: after the PVC glove is molded, taking out the hand mold from the oven, naturally cooling, and rolling the lip, dipping powder, demolding and removing the powder to obtain the PVC glove; the plasticizer is obtained by mixing dioctyl terephthalate and dioctyl adipate according to a molar ratio of 4:1.

The physical properties of the above examples 1 to 3 and comparative examples 1 and 2 were tested by slicing and sampling, and in order to reduce the test errors, a plurality of sets of equal-size sampling tests were performed for each case, and the final test values were averaged over the plurality of sets of test values, and the test results are shown in table 1.

Table 1 tensile strength and elongation test results for examples 1-3, comparative examples 1, 2

Sample of	Tensile Strength (Mpa)	Elongation (%)
			Example 1	15.7	554
Example 2	15.3	550
			Example 3	14.2	448
Comparative example 1	13.4	381
			Comparative example 2	13.2	361

From the tensile strength and elongation data of examples 1-3 and comparative examples 1, 2 in Table 1, it can be seen that: the softness and the elastic property of the soft high-elastic PVC glove are obviously improved by adding the elastomer; the tensile strength and elongation of the glove may be reduced by the reduced amount of elastomer.

In the description of the present specification, the descriptions of the terms "one embodiment," "example," "specific example," and the like, mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present invention. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiments or examples. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

The preferred embodiments of the invention disclosed above are intended only to assist in the explanation of the invention. The preferred embodiments are not exhaustive or to limit the invention to the precise form disclosed. Obviously, many modifications and variations are possible in light of the above teaching. The embodiments were chosen and described in order to best explain the principles of the invention and the practical application, to thereby enable others skilled in the art to best understand and utilize the invention. The invention is limited only by the claims and the full scope and equivalents thereof.

Claims

1. The soft high-elastic PVC glove is characterized by being prepared from the following raw materials in parts by weight: 100 parts of PVC paste resin, 50-60 parts of plasticizer, 10-20 parts of elastomer, 25-30 parts of viscosity reducer and 0.5-1 part of stabilizer;

the soft high-elastic PVC glove is prepared by the following steps:

step S4: cooling and post-treatment: after the PVC glove is molded, taking out the hand mold from the oven, naturally cooling, and rolling the lip, dipping powder, demolding and removing powder to obtain the soft high-elasticity PVC glove;

the plasticizer is obtained by mixing dioctyl terephthalate and dioctyl adipate according to a molar ratio of 3-4:1;

the elastomer is hydrophobic polyether polyurethane and is prepared by the following steps:

step A1, slowly adding a hydrophobic substance into polyether polyol under the condition of stirring;

a2, transferring the liquid treated in the step A1 into a four-neck flask with a stirrer, a condenser tube, a thermometer, a nitrogen introducing tube and a constant pressure funnel, heating to 100-130 ℃, and dehydrating for 2 hours;

step A3, cooling to normal temperature, adding 2, 4-toluene diisocyanate under the protection of nitrogen, stirring and heating to 60-80 ℃, measuring the-NCO value once every 0.5h, stopping the reaction when the-NCO value reaches 5-6%, and defoaming until the reaction is transparent to obtain the hydrophobic polyether polyurethane elastomer;

the hydrophobic substance in the step A1 is fluorocarbon auxiliary agent, and the addition amount is 1.2 percent of the total mass fraction of the reactants; the relative molecular mass of the polyether polyol in the step A1 is 1500; the molar ratio of the 2, 4-toluene diisocyanate to the polyether polyol in the step A3 is 1:5.

2. the soft, high elastic PVC glove according to claim 1, wherein the stabilizer is a high efficiency liquid calcium zinc stabilizer.

3. The soft, high elastic PVC glove according to claim 1, wherein the viscosity reducing agent is dearomatized oil.

4. The method for preparing the soft and high-elastic PVC glove according to claim 1, which is characterized by comprising the following steps:

step S2: dipping: filtering the raw material emulsion prepared in the step 1, vacuumizing, defoaming for 3 hours, then placing the raw material emulsion into an impregnating tank, preheating a hand die to 55-65 ℃ at the same time, and placing the hand die into the impregnating tank for impregnating at 50-60 ℃;