CN106215388B - A kind of solid pasted leather ball and its manufacturing process - Google Patents

Abstract

The invention relates to a solid leather ball and a manufacturing process thereof, wherein the solid leather ball comprises an outer skin layer and a solid inner container which are sequentially arranged from outside to inside, the solid inner container comprises a solid filling layer and a solid middle tire layer, the solid filling layer is arranged in the outer skin layer, the solid middle tire layer is arranged between the solid filling layer and the outer skin layer, and the solid inner container also comprises a protective layer which is arranged between the solid middle tire layer and the outer skin layer; the preparation process of the solid veneer gluing ball comprises the following process steps: a. manufacturing a solid filling ball; b. manufacturing a solid inner container; c. sticking a skin; the solid rubberized ball prepared by the invention has good stability, no air leakage, convenient use and long service life, is solid, but is not too heavy, does not influence the bounce of the ball, and can achieve the bounce performance same as that of the common inflatable rubberized ball.

Description

A kind of solid pasted leather ball and its manufacturing process

technical field

The invention relates to the field of sporting goods, in particular to a solid leather ball and a manufacturing process thereof.

Background technique

Traditional pasted balls are composed of inner tank layer, yarn layer or cloth layer, rubber material layer and leather material layer. They are inflatable pasted leather balls, and the size and weight of the finished balls have large fluctuations. The inflatable skinned ball can only maintain its elasticity and shape after being inflated. The ambient temperature will cause the change of the air pressure inside the ball, which will directly affect the touch, softness and elasticity of the ball, and thus affect the athlete's technique due to the difference in the air pressure of the ball. stable performance. The traditional inflatable leather ball, when the air pressure of the ball is not enough, it is often necessary to inflate to supplement the air pressure. When inflating, it is difficult to control the amount of gas inflated. Well, it’s hard to control, and it’s easy to hurt people; if the ball is filled too full, the surface of the ball will be relatively smoother, which reduces the friction force when the hand contacts the surface of the ball, making the ball harder to grasp; when the ball is not filled enough When it is full, it affects the bouncing performance of the ball. It can be seen that the traditional inflatable leather ball is inconvenient to use, and the inflatable leather ball is easily punctured by needle-like objects, causing the ball to leak and cannot be used, resulting in a waste of resources. In addition, the manufacturing process of the inflatable pasted ball is cumbersome, and the hollow inner tank needs to be vulcanized and molded, and then it takes a lot of time to polish and trim the vulcanized inner tank before applying the ball skin. Not only the production efficiency is low, but also high cost.

Contents of the invention

The purpose of the present invention is to provide a stable, easy-to-control, long service life solid leather ball and its manufacturing process.

The purpose of the present invention is achieved through the following technical solutions: a solid skinned ball, which includes an outer skin layer and a solid inner container arranged sequentially from outside to inside, and the solid inner container includes a solid filling layer and a solid inner core layer, so The solid filling layer is arranged in the outer skin layer, the solid inner core layer is arranged between the solid filling layer and the outer skin layer, and the solid liner also includes a protective layer, and the protective layer is arranged between the solid inner core layer and the outer skin layer between.

A kind of polyurethane foam material for making the described solid skinned ball, its formula is: by weight, comprising 95-105 parts of polyurethane, 75-85 parts of isocyanate, 0.01-5 parts of ethylene glycol amine, two 0.02-3 parts of ethanolamine, 3-5 parts of catalyst, 3-8 parts of foaming agent HCFC-14lb, 8-10 parts of stannous octoate, 3-6 parts of cell opener, 7-9 parts of silicone oil, 5 parts of dimethyl ethanolamine -20 parts, 5-8 parts of butanediolamine, 5-7 parts of dipropylene glycol, 3-5 parts of water, 10-20 parts of dichloromethane and 6-8 parts of white oil.

Described polyurethane is the polyurethane that the polyether model that Singapore Shell produces is 2082. The isocyanate is MDI-MM103C produced by BASF, Germany.

The inventor of the present invention has tried to only use the purchased polyether model as the polyurethane of 2082 as the material of the solid inner core layer, and found that only this raw material is used as the material for making the solid inner core layer, and the obtained solid pasted leather ball The bounce is not only bad, but also the weather resistance is not good, not stable enough, the ambient temperature will affect the softness and hardness of the whole ball.

Therefore, the present invention uses polyurethane with a polyether type of 2082 as a raw material, and mixes and foams it with other raw materials to obtain a polyurethane foam material with good performance. The solid leather ball made of this polyurethane foam material not only has moderate weight and moderate hardness, but also has good bounce and good sound absorption effect, so that when playing the ball, it will not move too much and disturb other people , In addition, the material has good weather resistance, and will not become too hard or too soft due to changes in ambient temperature, thereby affecting the performance of the ball. The solid sticker made of the polyurethane foam material of the present invention The ball is relatively stable.

The catalyst described in the present invention is one or a combination of catalyst A300, catalyst A33 and catalyst A1.

The cell-opening agent is one or more of liquid paraffin, polybutadiene, methyl polysiloxane, and dihydroxypropylene-oxyethylene copolyether.

The blowing agent HCFC-14lb can also be blowing agent CFC-11 or blowing agent HFC-245fa.

The preparation technology of solid pasting leather ball of the present invention, it comprises the following processing steps:

a. Production of solid filled balls: cutting and grinding EVA foam material or pearl cotton into spheres;

Cut the EVA foam material or pearl cotton into a cube first, then use a cutting machine to cut off the corners of the cube to make the cube into a spherical shape, and then grind it into a smooth and flat sphere on a grinder.

Because different types of balls have different circumference lengths, for example, the circumference lengths of #7, #6, and #3 basketballs are 76cm, 71cm, and 57cm, and the diameters of the corresponding balls are 24cm, 22cm, and 18cm, so according to different types of balls, Different sizes of solid filled balls need to be made. The diameter of the solid filled ball of the present invention is 1/3-3/4 (preferably 3/4) of the diameter of the whole ball, so the diameter of the solid filled ball prepared by the present invention is 6-18cm. Because the thickness of the skin attached to the outside of the solid liner and the PU or TPU film as the protective layer is very thin compared to the solid inner core layer, the rest of the whole ball is almost a solid inner core except for the solid filled ball. When the diameter of the solid filled ball is 1/3-3/4 of the diameter of the whole ball, it is combined with a solid inner core layer made of the polyurethane foam material of the present invention with a certain thickness to obtain a solid filled ball. A leather ball will have moderate weight and good bounce.

b. Making a solid liner: mix polyurethane, isocyanate, ethylene glycol amine, diethanol amine, catalyst, foaming agent HCFC-14lb, stannous octoate, cell opener, silicone oil, dimethyl ethanol amine, butanediol amine, di Propylene glycol, water, dichloromethane and white oil are mixed and heated, poured into a mold with solid filling balls planted in the center and PU film or TPU film attached to the inner wall surface, after pouring and molding, shake the mold, and then take it out and make it The solid liner is solidified and trimmed for later use;

c. Skinning: After the solid liner prepared in step b is pasted with a skin sheet, it can be repaired and solidified.

Wherein, the concrete method that described step b makes solid liner is:

Polyurethane, isocyanate, ethylene glycol amine, diethanol amine, catalyst, blowing agent HCFC-14lb, stannous octoate, cell opener, silicone oil, dimethylethanolamine, butylene glycol amine, dipropylene glycol, water, methylene chloride, and Put the white oil in the foaming filling machine after mixing, keep the temperature of the foaming filling machine at 40-50°C and wait for the filling;

After installing the mold on a rotating device that can rotate 360° up, down, left, and right, lay the PU film or TPU film on the inner wall of the mold, and turn on the air pump to form a negative pressure in the mold, so that the PU film or TPU film is close On the inner wall of the mould, implant and fix the prepared solid filling ball in the center of the mould, then heat the mold to 50°C±5°C in advance, and then pour the material in the foaming pouring machine into the In the mold, after pouring and molding, start the rotating equipment to shake the mold, and the shaking time is controlled at 5-6 minutes; finally take out the solid liner, place the solid liner at room temperature to cure for 3.5-4.5 hours, and repair the burr for later use.

The concrete method of described step c skinning is:

a. After brushing a layer of glue on the back of the skin that has been washed, trademark transferred, and edge-cut in advance, dry it for later use. The drying temperature is controlled within the range of 35°C-45°C, and the drying time is controlled within Within 3-5 minutes;

b. After brushing a layer of glue on the surface of the solid liner that has been made, dry it for later use. The drying temperature is controlled within the range of 35°C-45°C, and the drying time is controlled within the range of 3-5 minutes;

c. Paste the dried skin on the dried solid liner, the pasted skin can wrap the entire solid liner, and then refurbish the appearance of the solid liner with the skin on, Wait for the glue to cure at room temperature for 24-36 hours.

Compared with the prior art, the present invention has the advantages of:

1. The skinned ball of the present invention adopts a solid inner container structure to replace the existing hollow structure consisting of an inner container, a yarn layer, and a middle tire rubber material, thereby avoiding the hidden danger of poor airtightness of an ordinary inflatable skinned ball, and at the same time, it will not be damaged due to Changes in ambient temperature affect the touch, softness and elasticity of the ball, and can meet the daily performance requirements of basketball, volleyball and football.

2. The technology of the present invention further increases the stability of the ball and the function of never leaking air, which is more convenient to use and has a longer service life.

3. The solid liner of the solid leather ball includes a solid filling layer made of EVA foam or pearl cotton and a solid inner core layer made of polyurethane foam material, so that although the solid leather ball is solid, it is also It is not too heavy, does not affect the bounce of the ball, and can achieve the same bounce performance as ordinary inflatable leather balls.

4. The solid skinned ball made by the polyurethane foam material of the present invention has a more moderate weight than the ball made by the traditional polyurethane foam material, and has good bounce and good sound absorption effect. It prevents too much movement when playing the ball and disturbs other people. In addition, the material has good weather resistance and will not become too hard or too soft due to changes in ambient temperature, thereby affecting the performance of the ball. The solid skinned ball made of the polyurethane foam material of the present invention is relatively stable.

5. The present invention adopts low-temperature foaming technology when making the solid liner. Not only is the manufacturing process simple, but also the manufacturing conditions are mild. Because no vulcanization is required, no harmful gas will be produced, so it will not cause harm to the human body.

6. In the skin sticking process of the present invention, the glue-coated skin and the glue-coated solid liner are dried for a certain period of time and at a certain temperature, and then the two are bonded together, and the glue is cured to complete Skinning operation, this skinning process can ensure that the skin and the solid inner tank are firmly pasted, and there will be no warping of the skin, which increases the service life of the solid skinned ball.

Description of drawings

Fig. 1 is a schematic structural view of an embodiment of the present invention.

Explanation of symbols: 1 outer skin layer, 2 solid filling layer, 3 solid inner core layer, 4 protective layer.

Detailed ways

The content of the present invention will be described in detail below in conjunction with the accompanying drawings and embodiments of the description:

As shown in Figure 1: a solid pasted leather ball, it includes an outer skin layer 1 and a solid liner arranged sequentially from the outside to the inside, and the solid liner includes a solid filling layer 2 and a solid inner core layer 3. The solid filling layer 2 is arranged in the outer skin layer 1, and the solid inner core layer 3 is arranged between the solid filling layer 2 and the outer skin layer 1;

The solid liner also includes a protective layer 4, and the protective layer 4 is arranged between the solid inner core layer 3 and the outer skin layer 1;

The protective layer 4 is a PU or TPU film; the setting of the protective layer 4 enables the solid leather ball to achieve the impact resistance of a normal inflatable ball;

The material of the solid filling layer 2 is EVA foam material or pearl cotton material;

The material of the solid inner core layer 3 is polyurethane foam material;

The solid inner core layer 3 of the present invention is polyurethane foam material.

The solid inner core layer 3 is one-time foam molding in a mold with a solid filling layer 2 implanted in the center and a protective layer 4 absorbed on the inner wall surface, and forms an integral body with the solid filling layer 2 and the protective layer 4 to form a solid inner container.

If the whole solid liner adopts polyurethane foam material, the obtained solid pasted ball is relatively heavy, the bounce performance is not good, and the ball is not flexible enough to operate. Therefore, the present invention makes the solid filling layer made of EVA foam or pearl cotton material and The solid inner layer made of polyurethane foam material is combined to reduce the weight of the solid skinned ball, thereby improving the jumping degree, so that the jumping speed and weight of the whole solid skinned skinned ball are the same as those of ordinary inflatable skinned leather balls, which can meet the needs of daily use. Require.

Embodiment one: a kind of preparation technology of solid paste ball (#6 ball, ball diameter is 22cm), it comprises the following processing steps:

a. The making of solid filling ball: EVA foam material is cut, polished into sphere; The diameter of described solid filling ball is 2/3 of whole ball diameter, and the diameter of solid filling ball is 14.7cm;

b. Making a solid liner: in parts by weight, 100 parts of polyurethane, 80 parts of MDI-MM103C, 3 parts of ethylene glycol amine, 1 part of diethanolamine, 2 parts of catalyst A300, 1 part of catalyst A33, 1 part of catalyst A1, Foaming agent HCFC-14lb 5 parts, stannous octoate 9 parts, methyl polysiloxane 4 parts, silicone oil 8 parts, dimethylethanolamine 15 parts, butanediolamine 6 parts, dipropylene glycol 6 parts, water 4 parts , 15 parts of dichloromethane and 7 parts of white oil are mixed and placed in a foaming pouring machine, and the temperature of the foaming pouring machine is kept at 45°C to wait for pouring;

After installing the mold on a rotating device that can rotate 360° up, down, left, and right, lay the PU film or TPU film on the inner wall of the mold, and turn on the air pump to form a negative pressure in the mold, so that the PU film or TPU film is close On the inner wall of the mold, implant and fix the prepared solid filling ball in the center of the mold, then heat the mold to 50°C in advance, and pour the material in the foaming filling machine into the mold. After pouring and forming, start the rotating equipment to shake the mold, and the shaking time is controlled at 5 minutes; finally take out the solid liner, place the solid liner at room temperature to cure for 4 hours, and repair the burrs for later use.

c. Paste skin:

1) After brushing a layer of glue on the back of the skin that has been washed, trademarked and edge-cut, dry it for later use. The drying temperature is controlled at 40°C and the drying time is controlled within 4 minutes;

2) After brushing a layer of glue on the surface of the solid liner that has been made, dry it for later use. The drying temperature is controlled at 40°C, and the drying time is controlled within 4 minutes;

3) Paste the dried skin on the dried solid liner, the pasted skin can wrap the entire solid liner, and then repair the appearance of the solid liner with the skin on, Wait for the glue to cure at room temperature for 30 hours.

Embodiment two: a kind of preparation technology of solid pasting leather ball (#7 ball, ball diameter is 24cm), it comprises following processing steps:

a. The making of solid filled ball: EVA foam material is cut, polished into sphere; The diameter of described solid filled ball is 3/4 of the whole ball diameter, and the diameter of solid filled ball is 18.0cm;

b. Making a solid liner: in parts by weight, 95 parts of polyurethane, 75 parts of MDI-MM103C, 0.01 part of ethylene glycol amine, 0.02 part of diethanolamine, 3 parts of catalyst A300, 3 parts of foaming agent HCFC-14lb, octanoic acid 8 parts of stannous, 3 parts of liquid paraffin, 7 parts of silicone oil, 5 parts of dimethylethanolamine, 5 parts of butanediolamine, 5 parts of dipropylene glycol, 3 parts of water, 10 parts of dichloromethane and 6 parts of white oil In the foaming pouring machine, keep the temperature of the foaming pouring machine at 40°C and wait for the pouring;

After installing the mold on a rotating device that can rotate 360° up, down, left, and right, lay the PU film or TPU film on the inner wall of the mold, and turn on the air pump to form a negative pressure in the mold, so that the PU film or TPU film is close On the inner wall of the mold, implant and fix the prepared solid filling ball in the center of the mold, then heat the mold to 45°C in advance, and then pour the material in the foaming filling machine into the mold. After pouring and forming, start the rotating equipment to shake the mold, and the shaking time is controlled at 6 minutes; finally take out the solid liner, place the solid liner at room temperature to cure for 3.5 hours, and repair the burrs for later use.

c. Paste skin:

1) After brushing a layer of glue on the back of the skin that has been washed, trademark transferred, and edge-cut, dry it for later use. The drying temperature is controlled at 35°C, and the drying time is controlled within 3 minutes;

2) After brushing a layer of glue on the surface of the solid liner that has been made, dry it for later use. The drying temperature is controlled at 35°C, and the drying time is controlled within 3 minutes;

3) Paste the dried skin on the dried solid liner, the pasted skin can wrap the entire solid liner, and then repair the appearance of the solid liner with the skin on, Wait for the glue to cure at room temperature for 24 hours.

Embodiment three: a kind of preparation technology of solid pasting leather ball (#3 ball, ball diameter is 18cm), it comprises following processing steps:

a. The making of solid filling ball: EVA foam material is cut, polished into sphere; The diameter of described solid filling ball is 1/3 of whole ball diameter, and the diameter of solid filling ball is 6.0cm;

b. Making a solid liner: in parts by weight, 105 parts of polyurethane, 85 parts of MDI-MM103C, 5 parts of ethylene glycol amine, 3 parts of diethanolamine, 2 parts of catalyst A300, 3 parts of catalyst A33, blowing agent HCFC- 8 parts 14lb, 10 parts stannous octoate, 3 parts polybutadiene, 3 parts methylpolysiloxane, 9 parts silicone oil, 20 parts dimethylethanolamine, 8 parts butylene glycol amine, 7 parts dipropylene glycol, 5 parts water 20 parts, 20 parts of dichloromethane and 8 parts of white oil are mixed and placed in a foaming filling machine, and the temperature of the foaming filling machine is kept at 50°C for pouring;

After installing the mold on a rotating device that can rotate 360° up, down, left, and right, lay the PU film or TPU film on the inner wall of the mold, and turn on the air pump to form a negative pressure in the mold, so that the PU film or TPU film is close On the inner wall of the mold, implant and fix the prepared solid filling ball in the center of the mold, then heat the mold to 55°C in advance, and then pour the material in the foam filling machine into the mold. After pouring and forming, start the rotating equipment to shake the mold, and the shaking time is controlled at 6 minutes; finally take out the solid liner, place the solid liner at room temperature to cure for 4.5 hours, and repair the hair head for later use.

c. Paste skin:

1) After brushing a layer of glue on the back of the skin that has been washed, trademark transferred, and edge-cut, dry it for later use. The drying temperature is controlled at 45°C, and the drying time is controlled within 5 minutes;

2) After brushing a layer of glue on the surface of the prepared solid liner, dry it for later use. The drying temperature is controlled at 45°C, and the drying time is controlled within 5 minutes;

3) Paste the dried skin on the dried solid liner, the pasted skin can wrap the entire solid liner, and then repair the appearance of the solid liner with the skin on, Wait for the glue to cure at room temperature for 36 hours.

Claims (9)

1. a kind of solid sticky ball, it is characterised in that：In it includes the exodermis (1) being successively arranged from outside to inside and is solid Gallbladder, the solid liner include hatching solid layer (2) and solid middle plies (3), and hatching solid layer (2) setting exists In exodermis (1), the solid middle plies (3) is set between hatching solid layer (2) and exodermis (1), and described is solid interior Gallbladder further includes protective layer (4), and protective layer (4) is set between solid middle plies (3) and exodermis (1)；

The material of the solid middle plies is polyurethane foam material；

The polyurethane foam material, its formula are：In parts by weight, including 95-105 parts of polyurethane, isocyanates 75-85 Part, 0.01-5 parts of ethylene glycol amine, 0.02-3 parts of diethanol amine, 3-5 parts of catalyst, 3-8 parts of blowing agent H CFC-14lb, octanoic acid are sub- 8-10 parts of tin, 3-6 parts of pore-creating agent, 7-9 parts of silicone oil, 5-20 parts of dimethylethanolamine, 5-8 parts of butanediolamine, dipropylene glycol 5-7 Part, 3-5 parts of water, 10-20 parts of methylene chloride and 6-8 parts of white oil.

2. solid sticky ball according to claim 1, it is characterised in that：The protective layer is PU or TPU membrane.

3. solid sticky ball according to claim 1, it is characterised in that：The material of the hatching solid layer (2) is EVA hair Steep material or pearl cotton material.

4. a kind of for making the polyurethane foam material of solid sticky ball described in claim 1-3 any one, feature It is：Its formula is：In parts by weight, including 95-105 parts of polyurethane, 75-85 parts of isocyanates, ethylene glycol amine 0.01-5 Part, 0.02-3 parts of diethanol amine, 3-5 parts of catalyst, 3-8 parts of blowing agent H CFC-14lb, 8-10 parts of stannous octoate, pore-creating agent 3- 6 parts, 7-9 parts of silicone oil, 5-20 parts of dimethylethanolamine, 5-8 parts of butanediolamine, 5-7 parts of dipropylene glycol, 3-5 parts of water, methylene chloride 10-20 parts and 6-8 parts of white oil.

5. polyurethane foam material according to claim 4, it is characterised in that：The catalyst be catalyst A300, The mixing of one or more of catalyst A33, catalyst A1.

6. polyurethane foam material according to claim 4, it is characterised in that：The pore-creating agent is atoleine, gathers The mixing of one or more of butadiene, methyl polysiloxane, dihydroxyl oxypropylene and oxyethylene copolyether.

7. the preparation process of solid sticky ball according to claim 1 to 3, it is characterised in that：It includes following Processing step：

A. the production of hatching solid ball：By EVA foamed material or pearl cotton cutting, it is polished into sphere；

B. solid liner is made：By polyurethane, isocyanates, ethylene glycol amine, diethanol amine, catalyst, blowing agent H CFC- 14lb, stannous octoate, pore-creating agent, silicone oil, dimethylethanolamine, butanediolamine, dipropylene glycol, water, methylene chloride and white oil After Hybrid Heating, the center of being filled into is implanted with hatching solid ball, inner wall absorption is fitted in PU film or the mold of TPU membrane, wait fill After injection forming, mould is shaken, it is spare after taking out the solid liner solidification made later, rebuilding burr；

C. lagging：In stepb in solid liner outer patch obtained after skin graft, trimming, solidification.

8. the preparation process of solid sticky ball according to claim 7, it is characterised in that：In the step b production is solid The specific method of gallbladder is：Polyurethane, isocyanates, ethylene glycol amine, diethanol amine, catalyst, blowing agent H CFC-14lb, octanoic acid Stannous, pore-creating agent, silicone oil, dimethylethanolamine, butanediolamine, dipropylene glycol, water, methylene chloride and white oil mixing are placed on In foaming injection moulding machine, the temperature of foaming injection moulding machine is maintained at 40-50 DEG C of waiting perfusion；

After mold is mounted on the slewing that can be rotated up and down with 360 °, PU film or TPU membrane are layed in mold On inner wall, air exhauster is opened by negative pressure is formed in mold, so that PU film or TPU membrane be made to be tightly attached on the inner wall of mold, is connect The hatching solid ball made is implanted into and is fixed on the centre of mold, then mold is heated in advance 50 DEG C ± After 5 DEG C, the material being located in foaming injection moulding machine is filled into mold, after form, starting slewing shakes mould, shakes mould Time controlled at 5-6 minutes；Solid liner is finally taken out, it is whole after solid liner is carried out room temperature solidification 3.5-4.5 hours It repairs spare after burr.

9. the preparation process of solid sticky ball according to claim 7, it is characterised in that：The step c lagging it is specific Method is：

A. it after painting one layer of glue on the skin graft back side of overshoot skin, trade mark transfer and edge chamfered edge, is dried for standby in advance, Wherein within the scope of 35 DEG C -45 DEG C, drying time is controlled in 3-5 minutes ranges for drying temperature control；

B. it after the solid liner surface made paints one layer of glue, is dried for standby, wherein drying temperature control is 35 Within the scope of DEG C -45 DEG C, drying time is controlled in 3-5 minutes ranges；

C. the skin graft dried is attached on the solid liner dried, the skin graft posted can be by entire solid inner bag It wraps up in, the solid liner of skin graft will be posted later, carry out trimming appearance, after glue normal temperature cure 24-36 hours.