CN110229522A - A kind of shift printing rubber head and preparation method thereof - Google Patents
A kind of shift printing rubber head and preparation method thereof Download PDFInfo
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- CN110229522A CN110229522A CN201910616478.XA CN201910616478A CN110229522A CN 110229522 A CN110229522 A CN 110229522A CN 201910616478 A CN201910616478 A CN 201910616478A CN 110229522 A CN110229522 A CN 110229522A
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- parts
- rubber head
- printing rubber
- shift printing
- mold
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Classifications
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- A—HUMAN NECESSITIES
- A43—FOOTWEAR
- A43D—MACHINES, TOOLS, EQUIPMENT OR METHODS FOR MANUFACTURING OR REPAIRING FOOTWEAR
- A43D8/00—Machines for cutting, ornamenting, marking or otherwise working up shoe part blanks
- A43D8/16—Ornamentation
- A43D8/22—Ornamentation by embossing or printing
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L83/00—Compositions of macromolecular compounds obtained by reactions forming in the main chain of the macromolecule a linkage containing silicon with or without sulfur, nitrogen, oxygen or carbon only; Compositions of derivatives of such polymers
- C08L83/04—Polysiloxanes
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2205/00—Polymer mixtures characterised by other features
- C08L2205/02—Polymer mixtures characterised by other features containing two or more polymers of the same C08L -group
- C08L2205/025—Polymer mixtures characterised by other features containing two or more polymers of the same C08L -group containing two or more polymers of the same hierarchy C08L, and differing only in parameters such as density, comonomer content, molecular weight, structure
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2205/00—Polymer mixtures characterised by other features
- C08L2205/03—Polymer mixtures characterised by other features containing three or more polymers in a blend
- C08L2205/035—Polymer mixtures characterised by other features containing three or more polymers in a blend containing four or more polymers in a blend
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2207/00—Properties characterising the ingredient of the composition
- C08L2207/04—Thermoplastic elastomer
Abstract
The present invention relates to a kind of shift printing rubber heads, belong to the technical field of shift printing rubber, in parts by weight, preparing raw material includes silica gel, silicone oil, curing agent, plasticizer, defoaming agent, elastic reinforcing agent, wherein, the raw material for preparing of elastic reinforcing agent includes ethylene-vinyl acetate copolymer, cumyl peroxide, TPU, carbon black；The invention also discloses a kind of preparation methods of shift printing rubber head, comprising the following steps: S1: processing mold；S2: mixed glue solution is prepared；S3: molding；The present invention has preferable resilience, and transferring effect can be improved.
Description
Technical field
The present invention relates to the technical fields of shift printing rubber, more particularly, to a kind of shift printing rubber head and preparation method thereof.
Background technique
During producing sole, for the aesthetics for improving sole, often need in the edge printed color pattern of sole,
Shift printing rubber head is generallyd use to be transferred.
Existing to can refer to the Chinese patent application that notification number is CN103044925B, it discloses a kind of thermal transfer silicon
Glue, preparation method and applications, wherein the raw material for preparing of thermal transfer silica gel is helped including basic silica gel, crosslinking agent, silica gel modification
Agent, basic silica gel include dimethyl ethenyl silicone oil, white carbon black and platinum catalyst；Crosslinking agent includes dimethyl siloxane mixing
Ring DMC, Methyl Hydrogen Polysiloxane Fluid and cation exchange resin；Silica gel modified additive is acrylic acid epoxy resin, methacrylic acid changes
Property epoxy resin, epoxy resin modification acrylic acid, epoxy resin modification methacrylic acid it is one or more.
Prior art among the above has the following deficiencies: that the resilience of bat printing silica gel is lower, after long-time service, silica gel
It is easily deformed, so that silica gel is not easy to sole fitting, to influence transferring effect.
Summary of the invention
The purpose of the present invention one is to provide a kind of shift printing rubber head, has preferable resilience, transferring effect can be improved.
Above-mentioned purpose of the invention has the technical scheme that
A kind of shift printing rubber head, in parts by weight, preparing raw material includes 75-86 parts of silica gel, 16-28 parts of silicone oil, curing agent
0.5-1.6 parts, 0.1-0.4 parts of plasticizer, 0.8-1.4 parts of defoaming agent, 3-7 parts of elastic reinforcing agent, in parts by weight, elasticity
The raw material for preparing of reinforcing agent includes 25-36 parts of ethylene-vinyl acetate copolymer, 0.5-1.2 parts of cumyl peroxide, TPU
15-24 parts, 0.8-2.3 parts of carbon black.
By using above-mentioned technical proposal, silica gel has stronger suction-operated, is easy to inhale using rubber head made of silica gel
Attached ink realizes transferring effect consequently facilitating by printing ink transfer to sole, silica gel can sulfidization molding under room temperature again, have good
Good ink transfer performance and resistance to oil mass solvent borne；The addition of silicone oil can increase the pliability of silica gel, and the component of silicone oil is compared with Gao Ze
Cause shift printing rubber head excessively soft, meanwhile, silicone oil will destroy the component of silica gel, and cause shift printing rubber head it is not wear-resisting, not solvent resistant and
Aging phenomenon, so that the print pass of shift printing rubber head is few, the number for replacing shift printing rubber head increases, cost increase；The component of silicone oil
Lower, then rubber head hardness is larger, and the contact area of rubber head and sole is relatively small, and pattern is imperfect in printing process, secondly, if
Rubber head is really up to the mark, is difficult for ink to be adsorbed on shift printing rubber head；Therefore, the ratio in the present invention between strict control silica gel and silicone oil
Example, reaches optimal pliability；
If pliability is best, and the resilience of shift printing rubber head is poor so that after shift printing rubber head can not restore to the original state, together
Sample will lead to shift printing rubber head and can not be bonded with sole, cause the phenomenon of transferring effect difference, then, addition elasticity enhancing in the feed
Agent, to improve the resilience of shift printing rubber head；
Contain ethylene-vinyl acetate copolymer and TPU in elastic reinforcing agent, ethylene-vinyl acetate copolymer has more excellent
Resilience and cushion performance, TPU resilience for ethylene-vinyl acetate copolymer is weaker, but TPU finished product is as ink
Binder has the characteristics that good wearability, high tenacity, anti-after-tack have excellent performance, therefore, the copolymerization of strict control ethene-vinyl acetate
The proportion of object and TPU, which can be improved the resilience of shift printing rubber head and resists, after-tacks performance, so that shift printing rubber head can be extensive after use
Shape is restored, and ink adhesion is not easy to after-tack after on sole, improves transferring effect；
In addition, the tensile strength and elongation at break of TPU can be improved with carbon black filled TPU, to improve the mechanics of shift printing rubber head
Performance, cumyl peroxide can be used as the crosslinking agent of ethylene-vinyl acetate copolymer, improve ethylene-vinyl acetate copolymer
Intensity and durability, to further increase the intensity of shift printing rubber head；And the soft of shift printing rubber head can be improved in the addition of plasticizer
It while the cooperation of toughness, plasticizer and crosslinking agent is so that shift printing rubber head has some strength, and will not crack easily, to mention
The quality of high shift printing rubber head；The addition of cumyl peroxide crosslinking agent likely results in ethylene-vinyl acetate copolymer and is formed
The abscess of fine and even, defoaming agent can inhibit the generation of foam, so that it is guaranteed that shift printing rubber head smoothness of the surface；
In conclusion first by the ratio of control silica gel and silicone oil, so that shift printing rubber head has more moderate pliability, elasticity
The addition of reinforcing agent is so that shift printing rubber head has more excellent resilience with pliability, to improve transfer effect
Fruit.
The present invention is further arranged to: in parts by weight, preparing raw material includes 5-6 parts of elastic reinforcing agent, silicone oil 22-
26 parts, 80-83 parts of silica gel.
The present invention is further arranged to: in parts by weight, preparing raw material includes 80 parts of silica gel, 20 parts of silicone oil, hardening
1 part of agent, 1.1 parts of defoaming agent, 0.3 part of plasticizer, 5 parts of elastic reinforcing agent.
The present invention is further arranged to: in parts by weight, elastic reinforcing agent includes ethylene-vinyl acetate copolymer 30
Part, 0.8 part of cumyl peroxide, 20 parts of TPU, 1.4 parts of carbon black.
The present invention is further arranged to: it is diethylenetriamine that the curing agent, which is selected,.
The present invention is further arranged to: it is maleic anhydride that the plasticizer, which is selected,.
The present invention is further arranged to: it is polysiloxane defoaming agent that the defoaming agent, which is selected,.
The purpose of the present invention two is to provide a kind of preparation method of shift printing rubber head, comprising the following steps:
S1: processing mold cleans mold with cyclohexanone, then be uniformly applied to the inner wall of mold with dish washing liquid, sprays in mold
Dry powder mould release, it is spare, mold is covered；
S2: preparing mixed glue solution: proportionally, silica gel, silicone oil, plasticizer, defoaming agent, elastic reinforcing agent being stirred evenly, then
Curing agent is added thereto and stirs 2-10 minutes, mixed glue solution is made；
S3: filtering: mixed glue solution is filtered to mold, is taken out after 10-14 hours, and is reused after placing 10-14 hours.
By using above-mentioned technical proposal, the cleannes that can ensure that mold are first cleaned with cyclohexanone and dish washing liquid, are reduced miscellaneous
The influence of confrontation shift printing rubber head；The addition of dry powder mould release can prevent shift printing rubber head from adhering on mold, in shift printing rubber head and mould
Apply a kind of isolation film between tool, convenient for shift printing rubber head by deviating from mold, while guaranteeing that shift printing rubber head quality and mold are complete again
It is good lossless.
The present invention is further arranged to: in step S1, after being cleaned with cyclohexanone, wiping mold with waterproof abrasive paper and water sand
Inner wall, then cleaned up with white spirit.
By using above-mentioned technical proposal, the slickness of mold can be improved with waterproof abrasive paper wiping mould inner wall, help to mention
The Forming Quality of high shift printing rubber head；White spirit has fat-solubility and high volatile, and dirt-removing power is strong, and being cleaned with white spirit can be true
Protect the cleannes of mold.
In conclusion advantageous effects of the invention are as follows:
1. passing through the ratio of strict control silica gel and silicone oil, so that shift printing rubber head reaches optimal pliability, then it is added thereto
Elastic reinforcing agent, to enhance the resilience of shift printing rubber head, so that can restore to the original state after shift printing rubber head use, it is ensured that shift printing rubber
Head can be bonded with sole, to improve transferring effect；
2. the mechanical property of shift printing rubber head can be improved in the addition of carbon black and cumyl peroxide, shift printing rubber head is can be improved in plasticizer
Flexibility, defoaming agent can ensure that shift printing rubber head smoothness of the surface；
3. successively passing sequentially through cyclohexanone, waterproof abrasive paper, white spirit, dish washing liquid to clean mould inner wall, improve in mold
Cleannes, while ensuring that mould inner wall is smooth, reduce mold to the molding influence of shift printing rubber head, improves the quality of shift printing rubber head.
Specific embodiment
Embodiment 1
A kind of preparation method of shift printing rubber head, comprising the following steps:
S1: processing mold cleans mold with cyclohexanone, wipes mould inner wall with waterproof abrasive paper and water sand, then cleaned and done with white spirit
Only, it then with dish washing liquid is uniformly applied to the inner wall of mold, it is spare finally in spraying talcum powder in mold, mold is covered；
S2: mixed glue solution is prepared: in parts by weight, by 75 parts of silica gel, 28 parts of silicone oil, 0.1 part of maleic anhydride, polysiloxanes
1.4 parts of defoaming agent, 3 parts of elastic reinforcing agent stir evenly, then thereto be added 1.6 parts of diethylenetriamine and stir 2 minutes, be made
Mixed glue solution；Wherein elastic reinforcing agent includes 25 parts of ethylene-vinyl acetate copolymer, 1.2 parts of cumyl peroxide, TPU 15
Part, 2.3 parts of carbon black；
S3: filtering: mixed glue solution being filtered to mold, is taken out after 10 hours, and is reused after placing 10 hours.
Embodiment 2
A kind of preparation method of shift printing rubber head, comprising the following steps:
S1: processing mold cleans mold with cyclohexanone, wipes mould inner wall with waterproof abrasive paper and water sand, then cleaned and done with white spirit
Only, it then with dish washing liquid is uniformly applied to the inner wall of mold, it is spare finally in spraying talcum powder in mold, mold is covered；
S2: mixed glue solution is prepared: in parts by weight, by 80 parts of silica gel, 20 parts of silicone oil, 0.3 part of maleic anhydride, polysiloxanes
1.1 parts of defoaming agent, 5 parts of elastic reinforcing agent stir evenly, then 1 part of diethylenetriamine be added thereto and stirs 6 minutes, be made mixed
Close glue；Wherein elastic reinforcing agent includes 30 parts of ethylene-vinyl acetate copolymer, 0.8 part of cumyl peroxide, TPU 20
Part, 1.4 parts of carbon black；
S3: filtering: mixed glue solution being filtered to mold, is taken out after 12 hours, and is reused after placing 12 hours.
Embodiment 3
A kind of preparation method of shift printing rubber head, comprising the following steps:
S1: processing mold cleans mold with cyclohexanone, wipes mould inner wall with waterproof abrasive paper and water sand, then cleaned and done with white spirit
Only, it then with dish washing liquid is uniformly applied to the inner wall of mold, it is spare finally in spraying talcum powder in mold, mold is covered；
S2: mixed glue solution is prepared: in parts by weight, by 86 parts of silica gel, 16 parts of silicone oil, 0.4 part of maleic anhydride, polysiloxanes
0.8 part of defoaming agent, 7 parts of elastic reinforcing agent stir evenly, then thereto be added 0.5 part of diethylenetriamine and stir 10 minutes, system
Obtain mixed glue solution；Wherein elastic reinforcing agent includes 36 parts of ethylene-vinyl acetate copolymer, 0.5 part of cumyl peroxide, TPU
24 parts, 0.8 part of carbon black；
S3: filtering: mixed glue solution being filtered to mold, is taken out after 14 hours, and is reused after placing 14 hours.
Embodiment 4
A kind of preparation method of shift printing rubber head, the difference from example 2 is that, in S2, in parts by weight, by silica gel 78
Part, 18 parts of silicone oil, 0.2 part of maleic anhydride, 0.9 part of polysiloxane defoaming agent, 4 parts of elastic reinforcing agent stir evenly, then thereto
0.8 part of diethylenetriamine is added and stirs 6 minutes, mixed glue solution is made.
Embodiment 5
A kind of preparation method of shift printing rubber head, the difference from example 2 is that, in S2, in parts by weight, by silica gel 84
Part, 25 parts of silicone oil, 0.35 part of maleic anhydride, 1.3 parts of polysiloxane defoaming agent, 6 parts of elastic reinforcing agent stir evenly, then thereto
1.4 parts of diethylenetriamine is added and stirs 6 minutes, mixed glue solution is made.
Embodiment 6
A kind of preparation method of shift printing rubber head, the difference from example 2 is that, in S2, the raw material for preparing of elastic reinforcing agent includes
28 parts of ethylene-vinyl acetate copolymer, 0.6 part of cumyl peroxide, 18 parts of TPU, 1.2 parts of carbon black.
Embodiment 7
A kind of preparation method of shift printing rubber head, the difference from example 2 is that, in S2, the raw material for preparing of elastic reinforcing agent includes
32 parts of ethylene-vinyl acetate copolymer, 1 part of cumyl peroxide, 22 parts of TPU, 1.8 parts of carbon black.
Embodiment 8
A kind of preparation method of shift printing rubber head, the difference from example 2 is that, in S1, directly used after being cleaned with cyclohexanone
Dish washing liquid smears mould inner wall, sprays talcum powder then at mould inner wall, spare, and mold is covered.
Embodiment 9
A kind of preparation method of shift printing rubber head, the difference from example 2 is that, in S2, in parts by weight, silicone oil 22
Part, silica gel are 80 parts.
Embodiment 10
A kind of preparation method of shift printing rubber head, the difference from example 2 is that, in S2, in parts by weight, elastic reinforcing agent
5.5 parts, silicone oil be 24 parts, silica gel is 82 parts.
Embodiment 11
A kind of preparation method of shift printing rubber head, the difference from example 2 is that, in S2, in parts by weight, elastic reinforcing agent
For 6 parts, silicone oil be 26 parts, silica gel is 83 parts.
Comparative example 1
It uses Authorization Notice No. for the patent of CN1030408938B, discloses a kind of add-on type liquid for shift printing rubber head production
Body silicone rubber compound and preparation method thereof.
Performance detection
GB/T1681-2009 carries out resilience detection to embodiment 1-8 and comparative example 1 according to national standards；And measure shift printing rubber
The shore hardness of head；Sole is transferred by shift printing rubber head, observes transferring effect, testing result is as shown in table 1, table 2:
1 embodiment 1-8 of table and 1 performance test results of comparative example
2 embodiment 9-11 performance test results of table
| Project | Embodiment 9 | Embodiment 10 | Embodiment 11 |
| Resilience (%) | 97 | 98 | 97 |
| Transferring effect | Pattern is complete | Pattern is complete | Pattern is complete |
| Shore hardness A (degree) | 17±2 | 18±2 | 18±2 |
| Surface flatness | Smooth no abscess | Smooth no abscess | Smooth no abscess |
Interpretation of result:
The shift printing rubber head shore hardness as made from the preparation method of embodiment 1-8 is moderate as seen from Table 1 and surface without abscess is in
Smooth shape, and shift printing rubber head shore hardness made from comparative example 1 is bigger than normal and surface is not smooth enough, illustrates the additive amount of silicone oil more
It is moderate, it not only can change the hardness of shift printing rubber head, also have the function of lubrication；The addition of defoaming agent also further reduced bubble
A possibility that hole is formed；Secondly, being cleaned repeatedly before using mold to mold and with being sprayed with talcum powder, this sequence of operations
Convenient for shift printing rubber head will be formed by taking out in mold, a possibility that shift printing rubber head is adhered to mould inner wall is reduced, so that it is guaranteed that moving
Print the smoothness on rubber head surface.
As table 1 it is also seen that the shift printing rubber head as made from the preparation method of embodiment 1-8, resilience is preferable, and right
Shift printing rubber head resilience in ratio 1 is slightly poor, illustrates that the addition of elastic reinforcing agent can effectively improve the resilience of shift printing rubber head；It moves
Print rubber head have more moderate shore hardness, preferable resilience and surface it is smooth in the case where, the transferring effect detected is equal
Preferably, transfer pattern is than more complete, and then occurs the incomplete phenomenon of transfer portions pattern in comparative example 1.
Can be seen that by table 1 and table 2, the pliability and resilience effect of embodiment 9-11 is preferable, illustrate elastic reinforcing agent,
The ratio of silicone oil and silica gel will affect the pliability and resilience of shift printing rubber head, be increased in embodiment 9-11 by strict control elasticity
The ratio of strong agent, silicone oil and silica gel makes shift printing rubber head reach optimal pliability, while having more excellent resilience.
In conclusion shift printing rubber head made from preparation method provided by the present invention has more moderate shore hardness, together
When keep good resilience again, can reach preferable transferring effect.
The embodiment of present embodiment is presently preferred embodiments of the present invention, not limits protection of the invention according to this
Range, therefore: the equivalence changes that all structures under this invention, shape, principle are done, should all be covered by protection scope of the present invention it
It is interior.
Claims (10)
1. a kind of shift printing rubber head, it is characterised in that: in parts by weight, preparing raw material includes 75-86 parts of silica gel, silicone oil 16-
28 parts, 0.5-1.6 parts of curing agent, 0.1-0.4 parts of plasticizer, 0.8-1.4 parts of defoaming agent, 3-7 parts of elastic reinforcing agent, according to weight
The raw material for preparing of number meter, elastic reinforcing agent includes 25-36 parts of ethylene-vinyl acetate copolymer, cumyl peroxide 0.5-
1.2 parts, 15-24 parts of TPU, 0.8-2.3 parts of carbon black.
2. a kind of shift printing rubber head according to claim 1, it is characterised in that: in parts by weight, preparing raw material includes
5-6 parts of elastic reinforcing agent, 22-26 parts of silicone oil, 80-83 parts of silica gel.
3. a kind of shift printing rubber head according to claim 2, it is characterised in that: in parts by weight, preparing raw material includes
80 parts of silica gel, 20 parts of silicone oil, 1 part of curing agent, 0.3 part of plasticizer, 1.1 parts of defoaming agent, 5 parts of elastic reinforcing agent.
4. a kind of shift printing rubber head according to claim 3, it is characterised in that: in parts by weight, elastic reinforcing agent packet
Include 30 parts of ethylene-vinyl acetate copolymer, 0.8 part of cumyl peroxide, 20 parts of TPU, 1.4 parts of carbon black.
5. a kind of shift printing rubber head according to claim 3, it is characterised in that: it is diethylenetriamine that the curing agent, which is selected,.
6. a kind of shift printing rubber head according to claim 3, it is characterised in that: it is maleic anhydride that the plasticizer, which is selected,.
7. a kind of shift printing rubber head according to claim 3, it is characterised in that: it is silicone antifoam that the defoaming agent, which is selected,
Agent.
8. a kind of preparation method of shift printing rubber head described in -7 any one according to claim 1, it is characterised in that: including following
Step:
S1: processing mold: mold is cleaned with cyclohexanone, then is uniformly applied to the inner wall of mold with dish washing liquid, is sprayed in mold
Dry powder mould release, it is spare, mold is covered；
S2: preparing mixed glue solution: proportionally, silica gel, silicone oil, plasticizer, defoaming agent, elastic reinforcing agent being stirred evenly, then
Curing agent is added thereto and stirs 2-10 minutes, mixed glue solution is made；
S3: filtering: mixed glue solution is filtered to mold, is taken out after 10-14 hours, and is reused after placing 10-14 hours.
9. a kind of preparation method of shift printing rubber head according to claim 8, it is characterised in that: in step S1, use cyclohexanone
After cleaning, mould inner wall is wiped with waterproof abrasive paper and water sand, then cleaned up with white spirit.
10. a kind of shift printing rubber head according to claim 9, it is characterised in that: it is talcum powder that dry powder mould release, which is selected,.
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| CN110539553A (en) * | 2019-09-24 | 2019-12-06 | 东莞广华汽车饰件科技有限公司 | inflatable transfer printing device |
| CN112159595A (en) * | 2020-10-16 | 2021-01-01 | 深圳市久和丝印器材有限公司 | Rubber head for pad printing of different types of hand surface plate glass and preparation method thereof |
| CN114030196A (en) * | 2021-09-16 | 2022-02-11 | 昆山力普电子橡胶有限公司 | Pad printing rubber head, pad printing equipment and pad printing rubber head processing technology |
| CN114274578A (en) * | 2021-12-20 | 2022-04-05 | 深圳市众诚达应用材料科技有限公司 | Die sleeve and preparation and use methods thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110539553A (en) * | 2019-09-24 | 2019-12-06 | 东莞广华汽车饰件科技有限公司 | inflatable transfer printing device |
| CN112159595A (en) * | 2020-10-16 | 2021-01-01 | 深圳市久和丝印器材有限公司 | Rubber head for pad printing of different types of hand surface plate glass and preparation method thereof |
| CN112159595B (en) * | 2020-10-16 | 2021-11-23 | 深圳市久和丝印器材有限公司 | Rubber head for pad printing of different types of hand surface plate glass and preparation method thereof |
| CN114030196A (en) * | 2021-09-16 | 2022-02-11 | 昆山力普电子橡胶有限公司 | Pad printing rubber head, pad printing equipment and pad printing rubber head processing technology |
| CN114274578A (en) * | 2021-12-20 | 2022-04-05 | 深圳市众诚达应用材料科技有限公司 | Die sleeve and preparation and use methods thereof |
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