WO2002055280A1 - Plastic part and method for producing a plastic part - Google Patents

Abstract

The invention relates to a plastic part and to a method for producing a plastic part. Portions of a phase-change material are contained inside said plastic part. The invention provides that the phase-change material of the part, which is produced in a plastic injection method, is accommodated inside capillary spaces of supporting material parts, which are numerously arranged in a distributed manner inside the plastic part. To this end, the plastic part is produced by injecting liquefied plastic starting material in a mold cavity while using a common plastic starting material, and supporting material parts with capillary spaces are admixed with the plastic starting material before injecting it into the mold cavity. The phase-change material is accommodated inside the capillary spaces.

Description

00001 Plastic part and method for the production of a

00002 plastic hurry 00003

The invention relates to a plastic part with it

00005 contained portions of phase change material. 00006

00007 In addition, the invention also relates to a method

00008 for the production of a plastic part with contained

00009 shares of phase change material. 00010

Such plastic parts that can be molded are

00012 already known. For example, EP 747431 A2

00013. 00014

In addition, the prior art is based on DE 199

00016 29 861, US 4,908,166 and DE 199 02 990 AI

00017 reference. DE 199 29 861 describes sponge-like

00018 or liquid-absorbing mineral carrier materials

00019 lines with an organic or inorganic melting

00020 storage material, which carrier materials of organic

00021 see or inorganic materials are coated,

00022 where the melt storage material or a phase change

00023 sel material is permanently included. The wrapping

Material material can also be a plastic. 00025

U.S. Patent 4,808,166 describes a cross-linked

00027 polyolefin with phase change material absorbed therein

00028 al. The plastic thus obtained with contained therein

00029 phase change material can then take certain forms

00030 are brought. Finally, DE 199 02 990 AI

00031 writes a process for the injection molding of

00032 molded parts, in which in the sprayed plastic

00033 fillers and reinforcing materials are included. 00034 00035 The plastic parts mentioned, the phase change materials

Contain 00036 al, do not have the usual for

00037 plastic parts, such as polypropylene or polyethylene

00038 typical properties when these plastic parts in

00039 plastic injection molding are made. Insbesonde-

00040 re not in terms of hardness, but also not looking

00041 lent strength and durability. 00042

00043 There is therefore initially a need to

Specify 00044 part that is easy to manufacture and

00045 with proportions of phase change material to the usual

00046 plastic parts, especially with regard to hardness

00047 also as far as possible with regard to strength and durability

00048 requirements met. Furthermore

00049 there is a need to manufacture a corresponding

00050 procedure to be specified. 00051

For this purpose, the invention first proposes that the

00053 phase change material of plastic injection molding

00054 manufactured component in capillary spaces of carrier material

00055 rialteile is included, which carrier material parts

00056 distributed in a variety, preferably homogeneously mixed

Divides, are arranged in the plastic part. inventions

00058 appropriately the path is followed, in which then as

00059 plastic matrix serving usual plastic one

00060 plastic injection molded part, e.g. polypropylene, polyethylene

00061 len or the like. Distributes small parts of carrier material

00062 to integrate, which in turn received in capillary spaces

00063 menes phase change material included. Surprisingly

00064 has shown that these carrier material parts also

00065 in the course of the plastic injection molding process

00066 can enforce without the phase change material

00067 rial to essential parts from the capillary spaces

00068 emerges and then in some other way then in the

Distributed 00069 plastic matrix. The expansion of the 00070 phase change material when the plastic is heated

00071 fabric part easily added. The phase change measure

00072 terial uses the expansion caused by the phase

00073 replacement material not yet filled in before heating

00074 th parts of the capillary spaces. 00075

00076 Alternatively or in addition to the above-described art

00077 fabric part, it is also possible that the phase change

00078 material of the plastic injection molding process

00079 component is arranged in a wrapping matrix. The

00080 wrapping matrix is chosen so that it is in the course of the

00081 extrusion process not completely melted

00082 will. So in the part so produced are still

00083 components recognizable, the phase change material with

00084 have a wrapping matrix that does not or only

00085 partially in the course of the plastic injection molding process

00086 is melted. The wrap matrix is preferred

00087 also a plastic matrix. The wrapping matrix is

00088 in the finished part directly into the surrounding

00089 plastic injection matrix integrated. 00090

00091 In further detail, it is preferred that the viscous

00092 did the plastic material of the cladding plastic material

00093 trix is so high in the molten state that the

00094 plastic material not in capillary spaces of the binding material

00095 rials of phase change material occurs. The viscous

00096 t of plastic wrapping material should do this

2

00097 greater than 40mm / sec. his. The viscous

00098 sity of plastic wrapping material between 40 and

2

00099 400mm / sec. be chosen. Here is the viscosity

00100 affected, which the plastic material in the course of the

00101 leading the plastic injection process as the lowest

00102 occupies. The viscosity mentioned is especially then

00103 of importance if unclad carrier material parts

00104 are entered into the process, which capillary spaces 00105, in which the phase change material

00106 men. The manufactured plastic part, an artificial

00107 fabric molding, can be up to 80% based on its volume

00108 men to the carrier material containing the phase change material

00109 have material parts. As far as phase change material in

00110 is arranged in a wrapping matrix, the same applies

00111 upper limit based on the volume of the plastic part,

00112 where the wrapping matrix is included in the volume of the

00113 included parts is to be included. 00114

00115 With regard to the carrier material having capillary spaces

00116 parts is the specified lower viscosity limit of

00117 enveloping plastic advantageous because the capillary

00118 me then remain as expansion spaces if that

00119 plastic part thus produced in the usual way

00120 heat is applied. The phase change material

00121 therefore retains its expansion spaces and can be in the

00122 Extend and withdraw capillaries. 00123

00124 In this context, it is particularly preferred that

00125 the carrier material parts and in particular their capillary

00126 did are selected so that, depending on

00127 Processes that occur in the course of the spraying process

00128 temperatures do not cause the phase change

00129 material from the carrier material parts or its capillary

00130 leaks out. At least not in a substantial

00131 dimension. 00132

00133 It is also preferred that a carrier material part approx.

00134 up to 80% volume of phase change material

00135 points. 00136

00137 The carrier material parts are preferably very small.

00138 dials. Is a largest dimension of 1 mm or less

00139 preferred. It is further preferred that the dimension 00140 of a carrier material part in the range from 0.1 to 0.6 mm

00141 lies. On the other hand, they can also range in size

00142 to 1 cm and even above. Ultimately, this is

00143 also depends on the one used

00144 procedure. 00145

00146 In addition to paraffin, what is detailed below

00147 is explained, the phase change material can in particular

00148 also a salt or a higher boiling river

00149 liquid such as alcohol. The latter phase change

00150 material is particularly suitable for refrigeration applications. 00151

00152 With regard to the carrier material parts, it can

00153 next to a mineral with an open capillary

00154 act pore structure. The mineral possesses

00155 an absorbent solid structure, preferably made of

00156 a plaster material, a clay material, sand-lime brick,

00157 silica or from any combination of these

00158 materials. With regard to silica, both hydrophobic

00159 be as well as hydrophilic or pyrogenic silica

00160 are used. The carrier material particles can

00161 in a diameter range from 0.001 mm to

00162 3 mm are used. In any case, in the course of

00163 spraying process no destruction of the carrier material part

00164 Chen take place. The smaller diameters are rather

00165 for what has been mentioned in detail below

00166 "Cold process" provided. Preferred source products

00167 for the carrier material particles are also corresponding

00168 untreated gypsum boards, gypsum granules, diatomaceous earth

00169 nulate, diatomaceous earth, etc. These materials meet

00170 increased static requirements and also fire protection

00171 claims. In addition, fiber structures can also be used

00172 may be included. These can be distributed in the carrier material

00173 rialteile and / or arranged in the plastic matrix

00174. An example of fibers in this 00175 relationship to organic materials such as plastic,

00176 cellulose, wood, ceramic, mineral wool, plastic fiber

00177 sern, cotton or sheep's wool referenced. fiber elements

00178 made of plastic preferably have base materials such as

00179 polyester, polyamide, polyurethane, polyalkyl nitride or

00180 polyolefins. The mass fraction is preferably from

00181 latent heat storage material based on a carrier material

00182 rial portion between 5 and 50%, more preferably between

00183 see 40 and 50% of the mass of the carrier material part.

00184 The loading of the carrier material parts is further preferred.

00185 le provided with latent heat storage material so that

00186 in the carrier material part a residual air volume

00187 remains, the temperature-dependent volume changes of the

00188 receives latent heat storage material. These lie

00189 approximately in the range of 10% of the room volume, which the

00190 occupies latent heat storage material. The remaining volume

00191 can also be higher if it is not sufficient

00192 should be the overheating that occurs during enforcement

00193 the plastic injection molding machine onto the carrier material

00194 le acts to compensate. Taking balance here

00195 understood that it was not or practically not one

00196 leakage of latent heat storage material in which

00197 heated state, comes from the carrier material parts. 00198

00199 With regard to paraffin, everyone can

00200 known types of paraffin are used. So especially

00201 macro paraffins, intermediate paraffins and microcritics

00202 stalline waxes. Unless, how

00203 described above, just a dry setting

00204 is desired, consciously liquid components (low

00205 rig-melting n- and iso-alkanes and naphthenes)

00206 points. A special cut can also be made.

00207 that is selected so that it compares

00208 is narrow. A tight fit means that 00209 only chain lengths fewer numbers are included. Beispiels-

00210 as C14 to C16 or C20 to C23. 00211

00212 As is well known, at least on an industrial scale,

00213 if no very special precautions are taken

00214 the cutting is always in the sense of a frequent

00215 results in distribution, means the

00216 ter measure that in any case by far the largest

00217 proportion of a given amount of heat storage medium

00218 formed the chain lengths comprising a few numbers

00219 is. In detail, the cut is made after the

00220 desired melting temperature made. Furthermore

00221 has proven to be particularly advantageous

00222 the even-numbered, normal C chains (n-alkanes)

Prefer 00223. These point in the named insulation

00224 a surprisingly high heat storage capacity with phase

00225 change on. Alternatively or in addition to the through

00226 Vacuum distillation can also achieve paraffins

00227 synthetic paraffins, in the Fischer-Tropsch process

00228 paraffins obtained are used. These so-called

00229 th FT paraffins consist primarily of normal

00230 paraffins. More than 90% are usually n-alkanes. The

00231 rest are iso-alkanes. The chain length is from C30 to

00232 about C100, with a gradation (also solidification point,

00233 EP) from approx. 40 ° C to approx. 105 ° C. To the FT paraffins

00234 in general is also referred to, for example, the literature

00235 put A. Kühnle in fats, soaps, paints

00236 1982, pages 256 to 162. 00237

00238 With regard to the copolymers described in the

00239 ben latent heat storage material are used,

00240 can be individually different polymers

00241 act. About diblock, triblock, radial block and

00242 multiblock copolymers. The is particularly preferred

00243 Use as a Kraton, in particular as a "Kraton G" 00244 known copolymer. It is thermoplastic

00245 rubber. The diblock copolymer can be used in another

00246 detail from styrene and / or ethylene and / or propy-

00247 len exist. These polymers result in a cross-linked

00248 stiff gel. The mass obtained in this way can also be obtained

Describe 00249 as gelatinous. The latent heat storage

00250 chermaterial assumes this overall appearance.

00251 This is achieved in that the block copolymers

00252 form a three-dimensional network through physical

00253 cross connections. The cross connections occur

00254 on these block copolymers by forming

00255 submicroscopic small particles of a particle block

00256 kes, which can also be addressed as a domain. The

00257 can cross-link this insoluble domain by

00258 factors are reached which the cross-connecting

00259 affect the density of the network, including the

00260 length of unsolvable block domains, the length of solvable

00261 ren block domains and the number of cross-linked

00262 locations. 00263

00264 The copolymers can in different proportions

00265 the latent heat storage material may be included. customary

00266 they are in a proportion of 5 to 20%, however

00267 also under 5% and over 20%, there are about 25% as

00268 selected portion additionally mentioned, in which latent

00269 heat storage material included. This can also

00270 the temperature at which the

00271 latent heat storage material the plasticity limit

00272 reached. The higher the proportion of copolymers, the more

00273 is also the temperature at which the latent

00274 heat storage material is plastically deformable. It is

00275 wishes that the plasticity limit in the temperature range

00276 not the area of a latent heat storage material

00277 is reached. With about 20% shares of such copo-

00278 polymers in the latent heat storage material results 00279 a plasticity limit in the range of 140 to

00280 150 ° C. 00281

00282 With regard to the carrier material part, it can also be

00283 a carrier material impregnated with low-grade paraffin

00284 trade part that is made of high-grade paraffin, especially

00285 special FT paraffin, is surrounded. This at relative

00286 low melting temperature of the spray plastic. So

00287 can be achieved under certain circumstances that the FT paraf-

00288 fin forms an envelope which is not or not completely

00289 constantly melts in the course of the spraying process. 00290

00291 Regarding the plastic raw material or

00292 plastic matrix can in particular also be

00293 silicone or synthetic resins act with a hardener

00294 are offset. The plastic injection molding process

00295 ren, preferably at relatively low temperatures

00296 up to ambient temperatures, so performed

00297 that the molded part has not yet hardened

00298 tet, but only in the injection mold - chemical -

00299 hardens. Such a procedure can also be used with relative

00300 low pressures, approximately in the range from 0.01 bar to

00301 50/80 bar. While the

00302 framework of the present description otherwise addressed

00303 ne usual plastic spraying process here with pressures

00304 in the range of 50-300 bar. The printing

00305 upper limit results from the fact that the plastic

00306 not in the capillary spaces of the carrier material particles

00307 (at least not significantly) may be pressed in.

00308 This also gives a certain limit to the temperature

00309 which is tolerable. Overall, along with the

00310 written "cold process" results in a temperature

00311 range from 20-200 ° C, with the "cold process",

00312 ie with chemically curing silicone or synthetic resin, 00313 the temperature is in the range of 20-100 ° C and

00314 the usual plastic injection molding process in the range of

00315 100-200 ° C. 00316

00317 Even if the curing with the described "cold

00318 drive "takes place essentially in the injection mold,

00319 can also have a certain amount of pre-crosslinking already

00320 of the take place. 00321

00322 With regard to the further object of the invention,

00323 of the method for producing a plastic part

00324 with contained phase change material,

00325 there is a need to follow a simple procedure

00326 ben, which leads to plastic parts, which are the usual

00327 Requirements for hardness, but possibly also for strength

00328 performance or durability met. 00329

00330 This problem is solved procedurally in that

00331 the part in the plastic injection molding process by injection

00332 of liquefied plastic raw material in one

00333 mold cavity is produced using a

00334 usual plastic raw material, and that the

00335 plastic starting material before injection into the

00336 mold cavity carrier material parts with in their capillary

00337 added recorded phase change material

00338. 00339

00340 So it can be a conventional plastic injection molding machine

00341 an extruder can be used. Basically, however

00342 also the use of a piston press plastic injection

00343 machine possible. Such a plastic injection machine

00344 is known to be used as a plastic raw material

00345 Plastic granulate loaded. The granules penetrate

00346 the extruder and is there in a plastic up 00347 liquid state, with simultaneous heating, over-

00348 leads. 00349

00350 The carrier material parts can now in the one

00351 usually provided at the inlet of an extruder

00352 mass funnels can be introduced, but they can also

00353 via a separate inlet, on the tool side

00354 loaned the mass funnel, introduced into the extruder

00355 or just before the mold cavity. In

00356 the latter two cases is then due

00357 of the increased pressure, usually via a lock

00358 chamber required. 00359

00360 A maximum temperature that the plastic in the train

00361 of the spraying process and a maximum pressure,

00362 which the plastic in the course of the spraying process

00363 is exposed to evaporation

00364 of the phase change material used less than

00365 15 volume percent takes place. Preferably, the

00366 selected parameters so that less than 10

00367 volume percent and in particular such that less than 5

Evaporate 00368 percent by volume. 00369

00370 With regard to the plastic raw material, the

00371 phase change material and other aspects of

00372 used and used materials is on the

00373 referenced above. 00374

00375 The invention is further based on the

00376 attached drawing, showing: 00377

00378 Fig. 1 is a schematic side view

00379 an extruder plastic injection molding machine

00380 machine; and 00381 00382 Fig. 2 shows a cross section through a

00383 plastic injection molding

00384 plate part with portions

00385 phase change material. 00386

00387 is shown and described initially with reference to

00388 FIG. 1, a plastic injection machine 1 with an extrusion

00389 of FIG. 2, which is filled via a mass funnel 12.

00390 Downstream of the extruder 2 is an injection mold 3

00391 an upper tool 4 and a lower tool 5 provided

00392 hen. The lower tool 5 is in the plastic injection molding

00393 machine can be moved along rails 6 for opening. Here-

00394, for example, an opening knee joint 7 is provided

00395. 00396

00397 The extruder 2 has heating elements 8, which

00398 fabric starting material 9, which is in the form of granules

00399 is entered into the mass funnel 12, on a

00400 Heat plastic to fluid state. 00401

00402 in the funnel 12, which is only schematic

00403 is shown, continue to be carrier material parts

00404 11 introduced, which deposited in capillary cavities

00405 tes phase change material. Alternatively, you can

00406 the carrier material parts also via a schematic

00407 indicated second funnel 12 'are introduced,

00408 which is located near an end of the extruder 2 on the mold side.

00409 is assigned. Then there is a lock chamber

00410 or comparable device for overcoming the in

00411 the extruder pressure required. 00412

00413 A with a plastic injection molding machine according to FIG. 1

00414 typically manufactured molded part can be a body

00415 how _. he schematically shown in Figure 2 in cross section

00416 is. 00417 Furthermore, in this cross-sectional representation,

00418 table indicated that a large number of carrier material

00419 divide 11 distributed in the matrix of sprayed art

00420 material starting material 9 are arranged. With some

00421 parts produced in this way can, in terms of

00422 cross-sectional areas, observe an edge accumulation.

00423 Some parts that are described with the

00424 NEN capillary spaces having carrier material parts

00425 are made, one opposite from completely

00426 corresponding plastic manufactured parts increased

00427 Determine brittleness. The fracture shows up

00428 of a fracture surface the size of the one used

00429 granular carrier material parts oriented granular structure

00430 area. 00431

00432 All disclosed features are (in themselves) inventive

00433 considerably. We hereby disclose the application

00434 also the disclosure content of the associated / attached

00435 priority documents (copy of pre-registration) fully

00436 included in content, also for the purpose of features

00437 of these documents in claims of the present application

00438 to record.

Claims

00439 claims 00440 00441 1. Plastic part with parts contained therein 00442 phase change material, characterized in that the 00443 phase change material of plastic injection molding 00444 manufactured component in capillary spaces of carrier material 00445 rialteile is included, which carrier material parts 00446 distributed in a large number in the plastic part 00447 are classified. 00448 00449 2. Plastic part according to the features of the generic term 00450 of claim 1 or in particular according thereto, thereby 00451 indicates that the phase change material of the im 00452 Plastic injection molding manufactured component in 00453 a wrapping matrix is arranged, which in the course of 00454 Extrusion process not completely melted 00455 is. 00456 00457 3. Plastic part according to one or more of the previously 00458 claims or in particular according thereto, thereby 00459 characterized in that the carrier material part of a 00460 plastic matrix, which is used in the course of the extrusion process 00461 is not completely melted, is encased. 00462 00463 4. Plastic part according to one or more of the previously 00464 claims or in particular according thereto, thereby 00465 characterized that the viscosity of the coating 00466 plastic matrix in the molten state is so high 00467 that the plastic material is not in the capillary spaces of the 00468 binding material of the phase change material occurs. 00469 00470 5. Plastic part according to one or more of the previously 00471 claims or in particular according thereto, thereby 00472 characterized that the viscosity of the plastic 2 00473 wrapping material greater than 40mm / sec. is. 00474 6. Plastic part according to one or more of the previously 00475 claims or in particular according thereto, thereby 00476 characterized that the viscosity of the plastic 2 00477 wrapping material between 40 and 400mm / sec. is. 00478 00479 7. Plastic part according to one or more of the previously 00480 claims or in particular according thereto, thereby 00481 characterized that the plastic with regard to its 00482 viscosity in the molten state is selected so 00483 that penetration into the capillary spaces of the carrier material 00484 rialteile not taking place. 00485 00486 8. Plastic part according to one or more of the previously 00487 claims or in particular according thereto, thereby 00488 characterized that a kinematic viscosity of the 00489 plastic material greater than 40mm / sec. is. 00490 00491 9. Plastic part according to one or more of the previously 00492 claims or in particular according thereto, thereby 00493 characterized that the kinematic viscosity of the 2 00494 plastic material in the range of 40-400mm / sec. is. 00495 00496 10. Plastic part according to one or more of the previously 00497 claims or in particular according thereto, thereby 00498 characterized in that the plastic part has a volume 00499 part of up to 80% of the phase change material 00500 holding carrier material parts. 00501 00502 11. Plastic part according to one or more of the previously 00503 going claims or in particular according thereto, thereby 00504 characterized that a carrier material part approx. 15% 00505 or more based on the volume of the carrier material 00506 phase change material. 00507 00508 12. Plastic part according to one or more of the preceding claims or in particular according thereto, characterized 00510 in that a carrier material part has a largest 00511 dimension of 2 cm or less. 00512 00513 13. Plastic part according to one or more of the preceding 00514 claims or in particular according thereto, characterized 00515 in that a carrier material part has a largest 00516 dimension of 1 mm or less. 00517 00518 14. Plastic part according to one or more of the preceding 00519 claims or in particular according thereto, characterized 00520 in that a carrier material part has a largest 00521 dimension of 0.1 to 0.6 mm. 00522 00523 15. Plastic part according to one or more of the preceding 00524 claims or in particular according thereto, characterized 00525 in that the phase change material is paraffin 00526 or is paraffin-based. 00527 00528 16. Plastic part according to one or more of the preceding 00529 claims or in particular according thereto, characterized in 00530 that the carrier material part is soaked with FT-Par00531. 00532 00533 17. Plastic part according to one or more of the preceding claims or in particular according to it, characterized in 00535 that a carrier material part impregnated with low-grade paraffin 00536 is surrounded by high-grade Paraf00537 fin, in particular FT paraffin. 00538 00539 18. Plastic part according to one or more of the preceding 00540 claims or in particular according thereto, characterized in 00541 that the phase change material is a salt 00542. 00543 19. Plastic part according to one or more of the previously 00544 claims or in particular according thereto, thereby 00545 characterized that the phase change material a 00546 is higher boiling liquid like alcohol. 00547 00548 20. Method for producing a plastic part with 00549 contained therein in phase change material, 00550 characterized in that the plastic part in the plastic 00551 substance injection process by injecting liquefied 00552 te plastic starting material in a mold cavity 00553 is manufactured using a conventional plastic 00554 material starting material, and that the plastic starting 00555 gangs material before injection into the mold cavity 00556 carrier material parts with capillary spaces are added 00557 den, with phase change material in the capillary spaces 00558 is included .. 00559 00560 21. Method according to claim 20 or in particular 00561 according to, the method in a plastic injection molding 00562 machine is carried out with an extruder, thereby 00563 characterized that the admixture before enforcing the 00564 extruder is carried out. 00565 00566 22. The method according to claim 20 or 21 or in particular 00567 re thereafter, characterized in that the admixture 00568 is carried out when passing through the extruder. 00569 00570 23. The method according to any one of claims 20 to 22 or 00571 especially afterwards, characterized in that the 00572 admixture after passing through the extruder 00573 leads. 00574 00575 24. The method according to any one of claims 20 to 23 or 00576 especially afterwards, characterized in that the 00577 plastic material and the phase change material 00578 introduced different places in the extruder 00579. 00580 00581 25. The method according to any one of claims 20 to 24 or 00582 especially afterwards, characterized in that the 00583 carrier material parts in a plastic injection mold 00584 and that an extrusion coating of the capillary 00585 parts in the usual plastic injection molding process 00586 leads. 00587 00588 26. The method according to any one of claims 20 to 25 or 00589 in particular afterwards, characterized in that in 00590 the injection mold before performing the plastic injection molding 00591 driving additionally inserted a hardening material 00592 will. 00593 00594 27. The method according to any one of claims 20 to 26 or 00595 especially afterwards, characterized in that the 00596 strengthening material consists of fibers. 00597 00598 28. Method according to one of claims 20 to 27 or 00599 especially afterwards, characterized in that the 00600 bonding material is a textile or fiber fabric. 00601 00602 29. The method according to any one of claims 20 to 28 or 00603 in particular afterwards, characterized in that a 00604 carrier material part a fiberboard or a fiberboard 00605 part is. 00606 00607 30. The method according to any one of claims 20 to 29 or 00608 in particular afterwards, characterized in that a 00609 plastic is used, its viscosity is so high 00610 is that the plastic is not in the capillary spaces of the 00611 carrier material parts penetrates. 00612 00613 31. The method according to any one of claims 20 to 30 or 00614 especially afterwards, characterized in that a 00615 maximum temperature that the plastic in the course of 00616 spraying method, and a maximum pressure, 00617 which the plastic in the course of the spraying process 00618 is exposed, are chosen so that evaporation 00619 of the phase change material used less than 00620 15 volume percent takes place. 00621 00622 32. The method according to any one of claims 20 to 31 or 00623 in particular afterwards, characterized in that the 00624 pressure and / or the temperature are selected such that 00625 an evaporation of less than 10 volume percent 00626 takes place. 00627 00628 33. The method according to any one of claims 20 to 32 or 00629 especially afterwards, characterized in that the 00630 pressure and / or temperature are selected so that 00631 an evaporation of less than 5 percent by volume 00632 finds.