The invention relates to a preparation method and process of one-pass nitrile foamed gloves with smooth surface and two-pass nitrile foamed gloves

- Aug 03, 2019-

Background technology:

Protective gloves are used to protect human hands in special working situations. The first cotton thread and animal leather gloves have been developed into various kinds of protective gloves with different materials and properties. Due to different working situations, the requirements for the performance of gloves are not the same.Such as the general dip rubber gloves can be widely used in petrochemical industry, paint printing, agriculture and animal husbandry, automobile machinery maintenance and other industries;But there are some special requirements, such as the requirement for earthquake - proof function.The shock-proof gloves applied in the first application are shock-proof gloves obtained by means of bead point, or can be obtained by further preparation of impregnated rubber material. However, the bead point process in this preparation process requires a long time, a low production capacity and a high cost, so further improvement is needed.

The existing shock-proof glove is a kind of shock-proof glove with anti-wear inner pad, which is provided with a rubber sheet on the palm part and the finger part of the glove, and a soft foam inner pad is provided between the rubber sheet on the palm part and the body, and the rubber sheet is stitched or bonded on the body, or connected on the body with a demountable velcro-sticker.After being used for a period of time, the rubber pieces are easy to fall off, and the gloves can easily penetrate into the gloves after contacting with liquid, which will affect the use.There is no such thing as a shock-resistant glove with a slow recovery.


Technical implementation elements:

(1) technical problems to be solved

In order to solve the above problems of the prior art, the invention provides a preparation method of one-pass nitrile foamed gloves with smooth surface and two-pass nitrile foamed gloves. The preparation method is simple to operate and can be produced in large quantity. The prepared gloves have slow recovery elasticity and better shock absorption performance.

(2) technical scheme

To achieve the above purposes, the main technical scheme of the invention includes:

The invention relates to a preparation method of one-pass nitrile smooth two-pass nitrile foam gloves, which comprises the following steps:

S1. Place the glove embryo on the hand mold, preheat the hand mold, soak the coagulant, then soak the first dipping adhesive, and then soak the foamed adhesive;Among them, the first dipping adhesive and foamed adhesive are nitrile butadiene adhesive, and the foamed adhesive contains foaming agent and permeating agent.

S2. Dip the foamed gloves into the coagulant again;

S3. Pre-bake the gloves soaked with coagulant in step S2;

S4. Wash the gloves after pre-drying;

S5. The gloves washed in step S4 were vulcanized to obtain nitrile foamed gloves with one-pass nitrile smooth surface and two-pass nitrile foamed gloves.

This invention method by dipping two different dipping glue, first dip first dipping glue is make gloves nitrile smooth, using regular nitrile rubber slurry can, but the styrofoam is regular, foaming agent and penetrating agent is added to the rubber gloves to get the foam rubber, with a large number of coarse and fine mesh, with slow rebound elasticity and shock absorption performance, can be used to shock, collision avoidance.The use of osmosis agent makes the first dip adhesive and foamed adhesive can be well fused and fixed, making the combination of the two more firm.The first dip adhesive makes the gloves resistant to abrasion, heat insulation, grease, acid and alkali, and corrosion.Foamed rubber also has slow recovery elasticity, can absorb impact, reduce vibration, low rebound release, making gloves with shockproof function, and using nitrile material, more durable, the performance has been maintained for a long time, further improve the performance of gloves.

The preparation method of the invention is to soak the solidifying agent after dipping the foamed rubber, solidify the foamed rubber, and prebake the gloves at low temperature, and then wash the ions in the fixing agent, such as Ca or zinc, to avoid the influence of these ions on the subsequent first dipping rubber and the vulcanization of the foamed rubber.When curing at a higher temperature, the rubber is further densified, preferably at 100 ~ 120℃.

The preparation method of the invention is to obtain a glove with better performance and new use by improving the impregnation adhesive of nitrile and optimizing the technological process. When the first impregnation adhesive is impregnated, the glove embryo can be completely immersed or semi-immersed or palm immersed.Half dip means to dip the palm of the glove germ in half dip the back of the hand in the first dip which is 3/4 dip;Palm dip means to dip the palm of the glove germ with the first dipping adhesive, and the back of the hand with the first dipping adhesive which is 1/2.Determine the impregnation area according to the requirements.Dipping plastic foam, also can only palm leaching, the leaching styrofoam, fingerprint Angle slightly less than the Angle of dip first dipping glue, such making that the coverage of foam rubber is less than the first dipping glue coverage, one is that both can meet the requirements of performance and can effectively save raw material consumption, to reduce the cost, but when adding in the first impregnation rubber and foam rubber different color paste, can obtain different layered coating rubber gloves, use wear will feel better, have a beautiful look and feel.When impregnated with foamed rubber, it can also be carried out on the back of the palm. Foamed rubber can be directly combined with the glove embryo to form gloves with special requirements.

(3) beneficial effects

The beneficial effects of the invention are:

The invention provides a manufacturing method, through two dipping process, two dipping coagulant, one preheating, water washing and high temperature vulcanization to prepare gloves with nitrile base and nitrile foamed rubber above. The production process is simple, easy to realize industrial production, large output and low investment cost.The gloves are resistant to abrasion, heat insulation, oil stain, acid and alkali, corrosion resistance, as well as slow recovery and shock absorption.Its slow recovery elasticity can absorb impact force, reduce vibration, and release low rebound force. It is light and comfortable, resistant to oil, acid and alkali, and has certain cushioning function, which can better protect the safety of users.

Technical features:

1. A preparation method of one-pass nitrile smooth two-pass nitrile foam gloves is characterized by the following steps:

S1. Place the glove embryo on the hand mold, preheat the hand mold, soak the coagulant, then soak the first dipping adhesive, and then soak the foamed adhesive;Among them, the first dipping adhesive and foamed adhesive are nitrile butadiene adhesive, and the foamed adhesive contains foaming agent and permeating agent.

S2. Dip the foamed gloves into the coagulant again;

S3. Pre-bake the gloves soaked with coagulant in step S2;

S4. Wash the gloves after pre-drying;

S5. The gloves washed in step S4 were vulcanized to obtain nitrile foamed gloves with one-pass nitrile smooth surface and two-pass nitrile foamed gloves.

2. The preparation method described in claim 1 is characterized by that, in step S1, the foaming agent is any of the potassium oleate, potassium ricinoleate or sodium dodecyl benzene sulfonate or any combination thereof.

3. The preparation method described in claim 1 is characterized by, in step S1, the penetrant being either alkyl naphthalene sulfonate or nonylphenoxyethanol or any combination of the two.

4. The preparation method described in claim 1 is characterized by that, in step S1, the first impregnating adhesive is prepared with the following quality fractions: 900 to 1100 nitrile latex and 8 to 20 thickeners.

5. The preparation method mentioned in claim 1 is characterized by that, in step S1, the foamed adhesive is prepared according to the following materials: 900 ~ 1100 parts of nitrile latex, 7 ~ 30 parts of the foaming agent, 10 ~ 50 parts of the osmosis agent, 1 ~ 5 parts of KOH, and 8 ~ 20 parts of the thickener.

6. The preparation method mentioned in claim 1 is characterized by the solution of calcium chloride, calcium nitrate or zinc chloride dissolved in methanol, ethanol or water.

7. The preparation method described in claim 6 is characterized by the mass fraction of calcium chloride, calcium nitrate or zinc chloride of 1.5% ~ 20%.

8. The preparation method mentioned in claim 1 is characterized by that, in step S3, the pre-baking temperature is 50 ~ 90℃ and the time is 15 ~ 35 minutes.

9. The preparation method mentioned in claim 1 is characterized by the water temperature of 30 ~ 65℃ and the time of 20 ~ 50 minutes in step S4 and the curing temperature of 80 ~ 130℃ and the time of 40 ~ 90 minutes in step S5.

10. The preparation method, as described in any of claims 1-9, is characterized by that, in step S1, the first dipping adhesive is fully or partially dipped, and the foamed adhesive is fully or partially or palm dipped.

Technical summary

The invention relates to a preparation method of one-pass nitrile smooth two-pass nitrile foaming gloves, which includes preheating the glove embryo, dipping the coagulant, then dipping the first dipping adhesive, and then dipping the foamed adhesive;The first dipping adhesive and foamed adhesive are both nitrile butadiene adhesive.Again immersed in coagulant, pre-drying, washing, vulcanization.The gloves obtained by the method of the invention not only have the properties of abrasion resistance, heat insulation, oil resistance, acid and alkali resistance, corrosion resistance, but also have the properties of slow recovery elasticity and shock absorption.

SUB 乳胶(NBR)半浸胶手套 (7)