CN114478994A

CN114478994A - Novel dry-process foaming resin and production process thereof

Info

Publication number: CN114478994A
Application number: CN202210136655.6A
Authority: CN
Inventors: 夏永奎; 李伟; 张方伟; 马云宝; 马军华
Original assignee: Zhejiang Huada Resin Co ltd
Current assignee: Zhejiang Huada Resin Co ltd
Priority date: 2022-02-15
Filing date: 2022-02-15
Publication date: 2022-05-13

Abstract

The invention relates to a novel dry foaming resin and a production process thereof, wherein the dry foaming resin comprises a dry foaming polyurethane resin, and the dry foaming polyurethane resin is prepared from polyol, a chain extender, diphenylmethane diisocyanate, toluene diisocyanate, n-dimethylformamide and toluene; the polyurethane resin is used as a novel dry foaming polyurethane resin and has the advantages of good foaming effect, fine and dense foam holes and stable foaming effect, compared with the prior art, the PU leather prepared by using the dry foaming resin is soft and plump in hand feeling, good elasticity and good wearability.

Description

Novel dry-process foaming resin and production process thereof

Technical Field

The invention relates to a novel dry-process foaming resin and a production process thereof.

Background

Polyurethane resin is used as a high polymer material with the characteristics of high strength, tear resistance, wear resistance and the like, is widely applied to the fields of daily life, industrial and agricultural production, medicine and the like, natural leather has the advantages of softness, air permeability, wear resistance, high strength, high hygroscopicity, water vapor permeability and the like, but has the advantages of limited resources, high price, heavy pollution in the processing process, irregular shape, uneven thickness and easy damage on the surface, polyurethane artificial leather and synthetic leather are generally called polyurethane leather (pu leather), and because of the characteristics of the polyurethane resin, the pu leather has the advantages of high strength, wear resistance, cold resistance, air permeability, aging resistance, solvent resistance, soft texture, beautiful appearance and the like, has good processing performance, is an ideal imitation leather product for replacing natural leather, in recent years, the Chinese polyurethane material is rapidly increased, the specific gravity of the polyurethane material in the synthetic resin is increased more and more, the new technology, new raw materials and new process are endless, the variety is gradually increased year by year, however, the pu leather prepared by the existing polyurethane resin has the defects of light and thin hand feeling and shriveling hand feeling, and the conventional dry foaming resin is unstable in foaming, so that improvement is needed.

Disclosure of Invention

The invention aims to solve one of the technical problems in the prior art.

The technical scheme of the invention is realized as follows: a novel dry foaming resin comprises a dry foaming polyurethane resin, wherein the dry foaming polyurethane resin is prepared from polyol, a chain extender, diphenylmethane diisocyanate, toluene diisocyanate, n-dimethylformamide and toluene;

the polyol comprises polyester polyol and organic silicon oil polyol, the chain extender is ethylene glycol, 1, 4-butanediol and neopentyl glycol, the viscosity of the dry foaming polyurethane resin is 5-8 ten thousand cps/25 ℃, and the solid content is 59-61%.

The invention is further configured to: the dry foaming polyurethane resin also comprises an antioxidant and a foam stabilizer;

wherein the amount of the foam stabilizer is 0.1-2.5% of the mass of the dry foaming polyurethane resin.

Further, the dry-process foaming polyurethane resin is prepared by the following steps:

mixing polyol, diphenylmethane diisocyanate and n, n-dimethylformamide for prepolymerization reaction to obtain prepolymerization reaction liquid;

secondly, mixing the prepolymerization reaction liquid with toluene, a chain extender and toluene diisocyanate to carry out repeated tackifying reaction and dilution until the system viscosity is 5-8 ten thousand cps/25 ℃ and the solid content is 59-61%, so as to obtain two-liquid dry foaming polyurethane resin;

wherein, the dilution is performed by using n, n-dimethylformamide.

Further, the polyhydric alcohols in the step (I) comprise polyester polyhydric alcohols and organic silicon oil polyhydric alcohols; the mass ratio of the total mass of the polyester polyol to the mass of the organic silicon oil polyol is 9: 1;

in the step I, the solid content of a system at the beginning of the prepolymerization reaction is 55-60%, the chain extension coefficient is 0.75-1.2, the temperature of the prepolymerization reaction is 65-80 ℃, and the time is 60-120 min.

Further, the molar ratio of the addition amount of the chain extender to the addition amount of the polyol in the step I is 1: 1-3, the solid content of the system is 70-85% when the first tackifying reaction is started, the chain extension coefficient is 1, and the temperature of the tackifying reaction is 65-80 ℃.

By adopting the technical scheme, compared with the prior art, the invention has the beneficial effects that: the resin used as a novel dry foaming polyurethane resin has good foaming effect, fine and dense foam holes and stable foaming effect, and the pu leather prepared by using the dry foaming resin disclosed by the invention has soft and plump hand feeling, good elasticity and good wearability.

The invention also discloses a production process suitable for the novel dry foaming resin, which comprises the following steps:

thirdly, diluting the resin according to the following dilution ratio: diluting 30-40 parts of methyl ester solvent by 100 parts of resin, adding foaming powder: 0.3-1 part of filling powder is added into 5-7 parts of the mixture;

fourthly, coating the resin in the third step;

fifthly, sending the intermediate product in the step IV into an oven for pre-drying and laminating at the temperature of 100 ℃ and 110 ℃, and then completely drying and foaming at the temperature of 130 ℃ to form the PU leather.

Further, the oven still includes:

a base;

the pre-drying box body is arranged on the left side of the base, and an air inlet pipe is arranged at the upper end of the pre-drying box body;

the main drying box body is arranged on the right side of the base, a plurality of electric heating tubes are arranged in the main drying oven, and an exhaust pipe is arranged at the upper end of the main drying box body;

the cleaning unit is fixedly arranged on the base;

the fan box is internally provided with an exhaust fan;

a three-way valve;

the cleaning unit is arranged between the pre-drying box body and the main drying box body, the fan box is arranged at the upper end of the air inlet pipe, the lower end valve port of the three-way valve is connected with the upper end of the exhaust pipe, the left end valve port is communicated with the fan box through a connecting pipe, and the upper end valve port is connected with an air outlet pipe.

Further, the cleaning unit further includes:

the mounting plate is fixedly arranged on the base and symmetrically arranged at two sides of the product conveyed by the oven;

the cleaning box is arranged between the two mounting plates in a sliding manner through the pulleys;

the movable box is arranged in the cleaning box in a lifting manner;

the brush roller is rotatably arranged at the lower end of the movable box;

the rotating shaft is rotationally arranged in the movable box and is driven by a rotating motor, and a driving belt wheel and a cam are arranged on the rotating shaft;

the piston cavity is internally provided with a piston plate, and two sides of the upper end of the piston cavity are provided with one-way valves;

the return spring is arranged between the piston plate and the piston cavity;

the dust collection pipe is provided with a plurality of dust collection holes;

the dust collecting box is arranged on the upper surface of the cleaning box;

the dust collection box is connected with the one-way valve on the right side of the piston cavity through the connecting hose, and the lower end of the piston plate is connected with a piston rod abutted to the cam.

Further, the method also comprises the following steps:

the sliding groove is arranged on the side wall of the mounting plate, and a pair of pulleys is arranged in the sliding groove;

one end of the connecting shaft is fixedly connected with the side wall of the cleaning box, and the other end of the connecting shaft is forked and is movably connected with the two pulleys through bearings respectively;

wherein, the spout sets up along the direction of the product that the oven was carried, and the outside of bearing is provided with the mounting groove, is provided with the ring of moving away to avoid possible earthquakes in the mounting groove, and the spout reciprocating motion can be followed through the driving source to the cleaning box.

Further, the suspension ring further comprises:

the first shock absorbing ring is internally provided with a shock absorbing cavity;

the second shock absorbing rings are arranged on two sides of the first shock absorbing ring, and the inner sides of the second shock absorbing rings are provided with wave-shaped inner shock absorbing rings;

the outer diameter of the second shock absorbing ring is smaller than that of the first shock absorbing ring, and the deformation amount of the first shock absorbing ring is larger than the difference between the outer diameters of the first shock absorbing ring and the second shock absorbing ring.

By adopting the technical scheme, compared with the prior art, the invention has the beneficial effects that:

1) the manufactured PU leather has elastic and full hand feeling and no crease, and the product quality is improved;

2) the oven is closely matched with the production link, so that waste heat of the product during drying can be effectively utilized, the energy waste is reduced, and the production cost is reduced;

3) the impurity on the surface of the product can be effectively cleaned, the quality of the finished product of the product is further improved, and the product is stable in operation and not easy to damage.

The advantageous effects of the present invention will be explained in detail in the embodiments, thereby making the advantageous effects more apparent.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.

FIG. 1 is a schematic structural diagram of an embodiment of the present invention.

Fig. 2 is a schematic side view of the cleaning unit.

Fig. 3 is a schematic front view of the cleaning unit.

Fig. 4 is a schematic view of a pulley structure.

FIG. 5 is a schematic view of a shock absorbing ring structure.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Example 1:

the embodiment of the application provides a novel dry foaming resin, which comprises a dry foaming polyurethane resin, wherein the dry foaming polyurethane resin is prepared from polyol, a chain extender, diphenylmethane diisocyanate, toluene diisocyanate, n-dimethylformamide and toluene;

The dry foaming polyurethane resin also comprises an antioxidant and a foam stabilizer;

In the embodiment of the application, the novel dry foaming resin is adopted, and the resin has good foaming effect, fine and dense foam holes and stable foaming effect as the novel dry foaming polyurethane resin.

Example 2:

in this example, in addition to including the structural features of the previous examples, a further dry-blown polyurethane resin was prepared by the steps of:

wherein, the dilution is performed by using n, n-dimethylformamide.

The polyhydric alcohols in the step I comprise polyester polyhydric alcohols and organic silicon oil polyhydric alcohols; the mass ratio of the total mass of the polyester polyol to the mass of the organic silicon oil polyol is 9: 1;

The molar ratio of the addition amount of the chain extender to the addition amount of the polyol in the first step is 1: 1-3, the solid content of the system is 70-85% when the first tackifying reaction is started, the chain extension coefficient is 1, and the temperature of the tackifying reaction is 65-80 ℃.

Moreover, when the dry foaming polyurethane resin comprises the antioxidant and the foam stabilizer, the antioxidant and the foam stabilizer are added into the system after the viscosity and the solid content of the system meet the requirements.

A small amount of catalyst is added into the resin when the first tackifying reaction is started so as to accelerate the reaction speed, adjust the size of foam pores and improve the foam stability; the catalyst is preferably an amine catalyst and/or an organotin catalyst; the amount of the catalyst is preferably 50 to 200 ppm.

In the resin synthesis, after the tackifying reaction is started, the viscosity of the system is gradually increased, after the viscosity is increased to a certain degree, toluene is added into the system for dilution, then the tackifying reaction is continuously carried out, and the dilution is carried out after the viscosity is increased until the final solid content of the system reaches the requirement, and at the moment, the tackifying is carried out again until the viscosity reaches the requirement. The resin optimally controls the increase degree of viscosity in dilution to be 5-8 ten thousand cps/25 ℃, the solid content is 59-61%, and the screening and proportion adjustment of the foaming powder and the filling powder are carried out.

In the embodiment of the application, the novel dry foaming resin is adopted, the foaming effect is good, the foam holes are fine and dense, the foaming effect is stable, and the pu leather prepared by using the dry foaming resin disclosed by the invention is soft and plump in hand feeling, good in elasticity and good in wearability.

Example 3:

in the embodiment, in addition to the structural features of the previous embodiment, a production process suitable for the novel dry-process foaming resin is further disclosed, which comprises the following steps:

fourthly, coating the resin in the third step;

In the embodiment of the application, the production process suitable for the novel dry foaming resin is adopted, the foaming effect is high in stability and good in uniformity, the formed PU leather is elastic and full in hand feeling and free of crease, and the quality of finished products of the products is improved.

Example 4:

in this embodiment, in addition to including the structural features of the previous embodiments, a further oven includes: a base 1; the pre-drying box body 2 is arranged on the left side of the base 1, and an air inlet pipe 200 is arranged at the upper end of the pre-drying box body 2; the drying device comprises a main drying box body 3, wherein the main drying box body 3 is arranged on the right side of a base 1, a plurality of electric heating tubes 300 are arranged in a main drying oven 3, and an exhaust pipe 301 is arranged at the upper end of the main drying box body 3; the cleaning unit 4 is fixedly arranged on the base 1; the fan box 5, wherein an exhaust fan 51 is arranged in the fan box 5; a three-way valve 6;

the cleaning unit 4 is arranged between the pre-drying box body 2 and the main drying box body 3, the fan box 5 is arranged at the upper end of the air inlet pipe 200, the lower end valve port of the three-way valve 6 is connected with the upper end of the exhaust pipe 301, the left end valve port is communicated with the fan box 5 through the connecting pipe 302, and the upper end valve port is connected with the air outlet pipe 303.

In the embodiment of the application, adopt foretell production technology suitable for novel dry process expanded resin, in process of production, the intermediate product that will treat the stoving is carried to the pre-drying box and is carried main stoving box through the pre-drying box in, a plurality of electrothermal tubes produce heat in the main stoving box, thereby dry intermediate product, and simultaneously, air exhauster work in the fan case passes through the blast pipe with the hot-air in the main stoving box, in connecting pipe and the intake pipe send into the pre-drying box, thereby carry out the pre-drying to intermediate product through hot-blast, effectively utilized the waste heat in the main stoving box, the waste of the energy has been reduced, and the production cost is reduced.

Example 5:

in this embodiment, in addition to the structural features of the previous embodiment, the further cleaning unit 4 further includes: the mounting plate 401 is fixedly mounted on the base 1, and the mounting plate 401 is symmetrically arranged at two sides of a product conveyed by the oven; a cleaning box 402, wherein the cleaning box 402 is arranged between the two mounting plates 401 in a sliding manner through a pulley 403; the movable box 404 is arranged in the cleaning box 402 in a lifting manner, and the upper end of the movable box 404 is provided with a spring 405 connected with the cleaning box 402; a brush roller 406, the brush roller 406 being rotatably provided at a lower end of the movable box 404; the rotating shaft 407 is rotatably arranged in the movable box 404, the rotating shaft 407 is driven by a rotating motor 408, and a driving pulley 4071 and a cam 4072 are arranged on the rotating shaft 407; a piston cavity 409, a piston plate 410 is arranged in the piston cavity 409, and two sides of the upper end of the piston cavity 409 are provided with check valves 411; a return spring 412, the return spring 412 disposed between the piston plate 410 and the piston cavity 409; the dust suction pipe 413 is provided with a plurality of dust suction holes; a dust box 414, the dust box 414 is arranged on the upper surface of the cleaning box 402;

the brush rollers 406 are symmetrically arranged on two sides of a product conveyed by the oven from top to bottom, the brush rollers 406 are in transmission connection with a driving pulley 4071 through a driven pulley and a belt, a dust suction pipe 413 is arranged on one side of the brush rollers 406, the dust suction pipe 413 is connected with a one-way valve 411 on the left side of a piston cavity 409 through a connecting hose 415, a dust collection box 414 is connected with the one-way valve 411 on the right side of the piston cavity 409 through the connecting hose 415, and the lower end of the piston plate 410 is connected with a piston rod 416 abutted to a cam 4072.

In the embodiment of the application, adopt foretell production technology suitable for novel dry process foamed resin, in the production process, intermediate product is after the predrying, the impurity that its surface was holding up floats in the surface, in-process through the clearance case, it rotates to rotate the motor drive axis of rotation, thereby make driving pulley drive driven pulley rotate, the brush roller rotates along with driven pulley rotates, brush the impurity on intermediate product surface, the cam drives the piston plate through the piston rod and removes in the piston chamber simultaneously, thereby produce suction, the impurity that will brush up sends into the dust collection box through connecting hose in the in-process that the piston plate shifts up through dust absorption pipe and connecting hose suction piston chamber, thereby it is clear to be with intermediate product surface adnexed impurity, make things convenient for the follow-up processing of intermediate product, the finished product quality of product has been improved.

Example 6:

in this embodiment, in addition to the structural features of the foregoing embodiment, the method further includes:

a slide groove 417, the slide groove 414 is arranged on the side wall of the mounting plate 401, and a pair of pulleys 403 is arranged in the slide groove 414;

one end of the connecting shaft 418 is fixedly connected with the side wall of the cleaning box 402, and the other end of the connecting shaft 418 is forked and is respectively movably connected with the two pulleys 403 through bearings 419;

the chute 417 is arranged along the direction of the product conveyed by the oven, an installation groove is arranged outside the bearing 419, a shock absorbing ring 7 is arranged in the installation groove, and the cleaning box 402 can reciprocate along the chute 417 by a driving source.

In the embodiment of the application, adopt foretell production technology suitable for novel dry process foaming resin, in process of production, the cleaning box passes through the driving source along the direction of delivery reciprocating motion of intermediate product to make the brush roller rotate self when clearing up intermediate product surface, can also follow the reciprocal clearance of intermediate product direction of delivery, further improved the clearance effect, made things convenient for the subsequent processing of intermediate product, improved the finished product quality of product.

Example 7:

in this embodiment, in addition to the structural features of the previous embodiment, the shock absorbing ring 7 further includes:

a first suspension ring 71, wherein a suspension cavity is arranged in the first suspension ring 71;

a second suspension ring 72, wherein the second suspension ring 72 is arranged at two sides of the first suspension ring 71, and the inner side of the second suspension ring 72 is provided with a waved inner suspension ring 73;

wherein the outer diameter of the second suspension ring 72 is smaller than the outer diameter of the first suspension ring 71, and the deformation amount of the first suspension ring 71 is larger than the difference between the outer diameters of the first suspension ring 71 and the second suspension ring 72.

In the embodiment of the application, adopt foretell production technology suitable for novel dry process foaming resin, in process of production, first ring and the second of moving away to avoid possible earthquakes ring mutually supports and can weaken the buffering to the vibrations of not equidimension, has improved the operating stability of clearance unit, and the interior ring of moving away to avoid possible earthquakes can further strengthen the second and move away to avoid possible earthquakes the shock attenuation effect of ring, guarantees clearance unit steady operation.

The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.

Claims

1. A novel dry foaming resin comprises a dry foaming polyurethane resin, and is characterized in that: the dry foaming polyurethane resin is prepared from polyol, a chain extender, diphenylmethane diisocyanate, toluene diisocyanate, n-dimethylformamide and toluene;

the polyol comprises polyester polyol and organic silicon oil polyol, the chain extender is ethylene glycol, 1, 4-butanediol and neopentyl glycol, the viscosity of the dry foaming polyurethane resin is 5-8 ten thousand cps/25 ℃, and the solid content of the dry foaming polyurethane resin is 59-61%.

2. The novel dry-blown resin according to claim 1, wherein: the dry foaming polyurethane resin also comprises an antioxidant and a foam stabilizer;

3. The novel dry-process foaming resin according to claim 2, wherein the dry-process foaming polyurethane resin is prepared by the following steps:

mixing the prepolymerization reaction solution with toluene, a chain extender and toluene diisocyanate to carry out repeated tackifying reaction and dilution until the system viscosity is 5-8 ten thousand cps/25 ℃ and the solid content is 59-61 percent, so as to obtain a two-liquid dry foaming polyurethane resin;

wherein the dilution is performed by using n, n-dimethylformamide.

4. A novel dry-blown resin according to claim 3, wherein: the polyhydric alcohols in the step I comprise polyester polyhydric alcohols and organic silicon oil polyhydric alcohols; the mass ratio of the total mass of the polyester polyol to the mass of the organic silicon oil polyol is 9: 1;

in the step I, the solid content of a system at the beginning of a prepolymerization reaction is 55-60%, the chain extension coefficient is 0.75-1.2, the temperature of the prepolymerization reaction is 65-80 ℃, and the time is 60-120 min.

5. The novel dry-blown resin according to claim 4, wherein: the molar ratio of the addition amount of the chain extender in the step II to the addition amount of the polyol in the step I is 1: 1-3, the solid content of the system at the beginning of the first tackifying reaction is 70-85%, the chain extension coefficient is 1, and the temperature of the tackifying reaction is 65-80 ℃.

6. A production process suitable for the novel dry foaming resin of claim 5, which comprises a step I and a step II, and is characterized by further comprising the following steps of:

fourthly, coating the resin in the third step;

fifthly, sending the intermediate product in the step IV into an oven for pre-drying and laminating at the temperature of 100-110 ℃, and then completely drying and foaming at the temperature of 130 ℃ to form the PU leather.

7. The process for producing a novel dry-process foaming resin according to claim 6, wherein the oven further comprises:

a base (1);

the pre-drying box body (2) is arranged on the left side of the base (1), and an air inlet pipe (200) is arranged at the upper end of the pre-drying box body (2);

the drying device comprises a main drying box body (3), wherein the main drying box body (3) is arranged on the right side of a base (1), a plurality of electric heating pipes (300) are arranged in the main drying box body (3), and an exhaust pipe (301) is arranged at the upper end of the main drying box body (3);

the cleaning unit (4), the cleaning unit (4) is fixedly arranged on the base (1);

the fan box (5), wherein an exhaust fan (51) is arranged in the fan box (5);

a three-way valve (6);

the cleaning unit (4) is arranged between the pre-drying box body (2) and the main drying box body (3), the fan box (5) is arranged at the upper end of the air inlet pipe (200), the lower end valve port of the three-way valve (6) is connected with the upper end of the exhaust pipe (301), the left end valve port is communicated with the fan box (5) through a connecting pipe (302), and the upper end valve port is connected with an air outlet pipe (303).

8. The process for the production of a novel dry-blown resin according to claim 7, wherein said cleaning unit (4) further comprises:

the mounting plate (401) is fixedly mounted on the base (1), and the mounting plate (401) is symmetrically arranged at two sides of a product conveyed by the oven;

the cleaning box (402) is arranged between the two mounting plates (401) in a sliding mode through a pulley (403);

the movable box (404) is arranged in the cleaning box (402) in a lifting mode, and a spring (405) connected with the cleaning box (402) is arranged at the upper end of the movable box (404);

a brush roller (406), the brush roller (406) being rotatably disposed at a lower end of the movable box (404);

the rotating shaft (407) is rotatably arranged in the movable box (404), the rotating shaft (407) is driven by a rotating motor (408), and a driving pulley (4071) and a cam (4072) are arranged on the rotating shaft (407);

the piston device comprises a piston cavity (409), wherein a piston plate (410) is arranged in the piston cavity (409), and two sides of the upper end of the piston cavity (409) are respectively provided with a one-way valve (411);

a return spring (412), the return spring (412) disposed between the piston plate (410) and the piston cavity (409);

the dust collection pipe (413), wherein a plurality of dust collection holes are formed in the dust collection pipe (413);

a dust box (414), wherein the dust box (414) is arranged on the upper surface of the cleaning box (402);

the brush rollers (406) are symmetrically arranged on two sides of a product conveyed by the oven from top to bottom, the brush rollers (406) are in transmission connection with a driving pulley (4071) through a driven pulley and a belt, the dust suction pipe (413) is arranged on one side of the brush rollers (406), the dust suction pipe (413) is connected with a one-way valve (411) on the left side of the piston cavity (409) through a connecting hose (415), the dust collection box (414) is connected with the one-way valve (411) on the right side of the piston cavity (409) through the connecting hose (415), and the lower end of the piston plate (410) is connected with a piston rod (416) abutted to the cam (4072).

9. The process for producing a novel dry-blown resin according to claim 8, further comprising:

a chute (417), wherein the chute (414) is arranged on the side wall of the mounting plate (401), and a pair of pulleys (403) is arranged in the chute (414);

one end of the connecting shaft (418) is fixedly connected with the side wall of the cleaning box (402), and the other end of the connecting shaft (418) is forked and is respectively movably connected with the two pulleys (403) through bearings (419);

wherein, spout (417) set up along the direction of the product that the oven was carried, the outside of bearing (419) is provided with the mounting groove, be provided with in the mounting groove and move away from shock ring (7), spout (417) reciprocating motion can be followed through the driving source to cleaning box (402).

10. The process for producing a novel dry-blown resin as claimed in claim 9, wherein said shock absorbing ring (7) further comprises:

a first suspension ring (71), said first suspension ring (71) having a suspension cavity therein;

the second shock absorbing ring (72) is arranged on two sides of the first shock absorbing ring (71), and the inner side of the second shock absorbing ring (72) is provided with a wave-shaped inner shock absorbing ring (73);

the outer diameter of the second shock absorbing ring (72) is smaller than that of the first shock absorbing ring (71), and the deformation amount of the first shock absorbing ring (71) is larger than the difference between the outer diameters of the first shock absorbing ring (71) and the second shock absorbing ring (72).